diff options
88 files changed, 6781 insertions, 498 deletions
diff --git a/Documentation/devicetree/bindings/clock/renesas,r8a7778-cpg-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,r8a7778-cpg-clocks.txt index 2f3747f..e4cdaf1c 100644 --- a/Documentation/devicetree/bindings/clock/renesas,r8a7778-cpg-clocks.txt +++ b/Documentation/devicetree/bindings/clock/renesas,r8a7778-cpg-clocks.txt @@ -1,7 +1,9 @@ * Renesas R8A7778 Clock Pulse Generator (CPG) The CPG generates core clocks for the R8A7778. It includes two PLLs and -several fixed ratio dividers +several fixed ratio dividers. +The CPG also provides a Clock Domain for SoC devices, in combination with the +CPG Module Stop (MSTP) Clocks. Required Properties: @@ -10,10 +12,18 @@ Required Properties: - #clock-cells: Must be 1 - clock-output-names: The names of the clocks. Supported clocks are "plla", "pllb", "b", "out", "p", "s", and "s1". + - #power-domain-cells: Must be 0 +SoC devices that are part of the CPG/MSTP Clock Domain and can be power-managed +through an MSTP clock should refer to the CPG device node in their +"power-domains" property, as documented by the generic PM domain bindings in +Documentation/devicetree/bindings/power/power_domain.txt. -Example -------- + +Examples +-------- + + - CPG device node: cpg_clocks: cpg_clocks@ffc80000 { compatible = "renesas,r8a7778-cpg-clocks"; @@ -22,4 +32,17 @@ Example clocks = <&extal_clk>; clock-output-names = "plla", "pllb", "b", "out", "p", "s", "s1"; + #power-domain-cells = <0>; + }; + + + - CPG/MSTP Clock Domain member device node: + + sdhi0: sd@ffe4c000 { + compatible = "renesas,sdhi-r8a7778"; + reg = <0xffe4c000 0x100>; + interrupts = <0 87 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp3_clks R8A7778_CLK_SDHI0>; + power-domains = <&cpg_clocks>; + status = "disabled"; }; diff --git a/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt index ed3c8cb..8c81547 100644 --- a/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt +++ b/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt @@ -1,7 +1,9 @@ * Renesas R8A7779 Clock Pulse Generator (CPG) The CPG generates core clocks for the R8A7779. It includes one PLL and -several fixed ratio dividers +several fixed ratio dividers. +The CPG also provides a Clock Domain for SoC devices, in combination with the +CPG Module Stop (MSTP) Clocks. Required Properties: @@ -12,16 +14,36 @@ Required Properties: - #clock-cells: Must be 1 - clock-output-names: The names of the clocks. Supported clocks are "plla", "z", "zs", "s", "s1", "p", "b", "out". + - #power-domain-cells: Must be 0 +SoC devices that are part of the CPG/MSTP Clock Domain and can be power-managed +through an MSTP clock should refer to the CPG device node in their +"power-domains" property, as documented by the generic PM domain bindings in +Documentation/devicetree/bindings/power/power_domain.txt. -Example -------- + +Examples +-------- + + - CPG device node: cpg_clocks: cpg_clocks@ffc80000 { compatible = "renesas,r8a7779-cpg-clocks"; - reg = <0 0xffc80000 0 0x30>; + reg = <0xffc80000 0x30>; clocks = <&extal_clk>; #clock-cells = <1>; clock-output-names = "plla", "z", "zs", "s", "s1", "p", "b", "out"; + #power-domain-cells = <0>; + }; + + + - CPG/MSTP Clock Domain member device node: + + sata: sata@fc600000 { + compatible = "renesas,sata-r8a7779", "renesas,rcar-sata"; + reg = <0xfc600000 0x2000>; + interrupts = <0 100 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp1_clks R8A7779_CLK_SATA>; + power-domains = <&cpg_clocks>; }; diff --git a/Documentation/devicetree/bindings/clock/renesas,rcar-gen2-cpg-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,rcar-gen2-cpg-clocks.txt index 56f111b..2a9a8ed 100644 --- a/Documentation/devicetree/bindings/clock/renesas,rcar-gen2-cpg-clocks.txt +++ b/Documentation/devicetree/bindings/clock/renesas,rcar-gen2-cpg-clocks.txt @@ -2,6 +2,8 @@ The CPG generates core clocks for the R-Car Gen2 SoCs. It includes three PLLs and several fixed ratio dividers. +The CPG also provides a Clock Domain for SoC devices, in combination with the +CPG Module Stop (MSTP) Clocks. Required Properties: @@ -20,10 +22,18 @@ Required Properties: - clock-output-names: The names of the clocks. Supported clocks are "main", "pll0", "pll1", "pll3", "lb", "qspi", "sdh", "sd0", "sd1", "z", "rcan", and "adsp" + - #power-domain-cells: Must be 0 +SoC devices that are part of the CPG/MSTP Clock Domain and can be power-managed +through an MSTP clock should refer to the CPG device node in their +"power-domains" property, as documented by the generic PM domain bindings in +Documentation/devicetree/bindings/power/power_domain.txt. -Example -------- + +Examples +-------- + + - CPG device node: cpg_clocks: cpg_clocks@e6150000 { compatible = "renesas,r8a7790-cpg-clocks", @@ -34,4 +44,16 @@ Example clock-output-names = "main", "pll0, "pll1", "pll3", "lb", "qspi", "sdh", "sd0", "sd1", "z", "rcan", "adsp"; + #power-domain-cells = <0>; + }; + + + - CPG/MSTP Clock Domain member device node: + + thermal@e61f0000 { + compatible = "renesas,thermal-r8a7790", "renesas,rcar-thermal"; + reg = <0 0xe61f0000 0 0x14>, <0 0xe61f0100 0 0x38>; + interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp5_clks R8A7790_CLK_THERMAL>; + power-domains = <&cpg_clocks>; }; diff --git a/Documentation/devicetree/bindings/clock/renesas,rz-cpg-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,rz-cpg-clocks.txt index b0f7ddb..bb51a33 100644 --- a/Documentation/devicetree/bindings/clock/renesas,rz-cpg-clocks.txt +++ b/Documentation/devicetree/bindings/clock/renesas,rz-cpg-clocks.txt @@ -2,6 +2,8 @@ The CPG generates core clocks for the RZ SoCs. It includes the PLL, variable CPU and GPU clocks, and several fixed ratio dividers. +The CPG also provides a Clock Domain for SoC devices, in combination with the +CPG Module Stop (MSTP) Clocks. Required Properties: @@ -14,10 +16,18 @@ Required Properties: - #clock-cells: Must be 1 - clock-output-names: The names of the clocks. Supported clocks are "pll", "i", and "g" + - #power-domain-cells: Must be 0 +SoC devices that are part of the CPG/MSTP Clock Domain and can be power-managed +through an MSTP clock should refer to the CPG device node in their +"power-domains" property, as documented by the generic PM domain bindings in +Documentation/devicetree/bindings/power/power_domain.txt. -Example -------- + +Examples +-------- + + - CPG device node: cpg_clocks: cpg_clocks@fcfe0000 { #clock-cells = <1>; @@ -26,4 +36,19 @@ Example reg = <0xfcfe0000 0x18>; clocks = <&extal_clk>, <&usb_x1_clk>; clock-output-names = "pll", "i", "g"; + #power-domain-cells = <0>; + }; + + + - CPG/MSTP Clock Domain member device node: + + mtu2: timer@fcff0000 { + compatible = "renesas,mtu2-r7s72100", "renesas,mtu2"; + reg = <0xfcff0000 0x400>; + interrupts = <0 107 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "tgi0a"; + clocks = <&mstp3_clks R7S72100_CLK_MTU2>; + clock-names = "fck"; + power-domains = <&cpg_clocks>; + status = "disabled"; }; diff --git a/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt b/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt new file mode 100644 index 0000000..b1669fb --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt @@ -0,0 +1,44 @@ +Tegra124 CPU frequency scaling driver bindings +---------------------------------------------- + +Both required and optional properties listed below must be defined +under node /cpus/cpu@0. + +Required properties: +- clocks: Must contain an entry for each entry in clock-names. + See ../clocks/clock-bindings.txt for details. +- clock-names: Must include the following entries: + - cpu_g: Clock mux for the fast CPU cluster. + - cpu_lp: Clock mux for the low-power CPU cluster. + - pll_x: Fast PLL clocksource. + - pll_p: Auxiliary PLL used during fast PLL rate changes. + - dfll: Fast DFLL clocksource that also automatically scales CPU voltage. +- vdd-cpu-supply: Regulator for CPU voltage + +Optional properties: +- clock-latency: Specify the possible maximum transition latency for clock, + in unit of nanoseconds. + +Example: +-------- +cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + device_type = "cpu"; + compatible = "arm,cortex-a15"; + reg = <0>; + + clocks = <&tegra_car TEGRA124_CLK_CCLK_G>, + <&tegra_car TEGRA124_CLK_CCLK_LP>, + <&tegra_car TEGRA124_CLK_PLL_X>, + <&tegra_car TEGRA124_CLK_PLL_P>, + <&dfll>; + clock-names = "cpu_g", "cpu_lp", "pll_x", "pll_p", "dfll"; + clock-latency = <300000>; + vdd-cpu-supply: <&vdd_cpu>; + }; + + <...> +}; diff --git a/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt b/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt new file mode 100644 index 0000000..e6df32f --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt @@ -0,0 +1,125 @@ +* Device tree bindings for ARM PL172 MultiPort Memory Controller + +Required properties: + +- compatible: "arm,pl172", "arm,primecell" + +- reg: Must contains offset/length value for controller. + +- #address-cells: Must be 2. The partition number has to be encoded in the + first address cell and it may accept values 0..N-1 + (N - total number of partitions). The second cell is the + offset into the partition. + +- #size-cells: Must be set to 1. + +- ranges: Must contain one or more chip select memory regions. + +- clocks: Must contain references to controller clocks. + +- clock-names: Must contain "mpmcclk" and "apb_pclk". + +- clock-ranges: Empty property indicating that child nodes can inherit + named clocks. Required only if clock tree data present + in device tree. + See clock-bindings.txt + +Child chip-select (cs) nodes contain the memory devices nodes connected to +such as NOR (e.g. cfi-flash) and NAND. + +Required child cs node properties: + +- #address-cells: Must be 2. + +- #size-cells: Must be 1. + +- ranges: Empty property indicating that child nodes can inherit + memory layout. + +- clock-ranges: Empty property indicating that child nodes can inherit + named clocks. Required only if clock tree data present + in device tree. + +- mpmc,cs: Chip select number. Indicates to the pl0172 driver + which chipselect is used for accessing the memory. + +- mpmc,memory-width: Width of the chip select memory. Must be equal to + either 8, 16 or 32. + +Optional child cs node config properties: + +- mpmc,async-page-mode: Enable asynchronous page mode. + +- mpmc,cs-active-high: Set chip select polarity to active high. + +- mpmc,byte-lane-low: Set byte lane state to low. + +- mpmc,extended-wait: Enable extended wait. + +- mpmc,buffer-enable: Enable write buffer. + +- mpmc,write-protect: Enable write protect. + +Optional child cs node timing properties: + +- mpmc,write-enable-delay: Delay from chip select assertion to write + enable (WE signal) in nano seconds. + +- mpmc,output-enable-delay: Delay from chip select assertion to output + enable (OE signal) in nano seconds. + +- mpmc,write-access-delay: Delay from chip select assertion to write + access in nano seconds. + +- mpmc,read-access-delay: Delay from chip select assertion to read + access in nano seconds. + +- mpmc,page-mode-read-delay: Delay for asynchronous page mode sequential + accesses in nano seconds. + +- mpmc,turn-round-delay: Delay between access to memory banks in nano + seconds. + +If any of the above timing parameters are absent, current parameter value will +be taken from the corresponding HW reg. + +Example for pl172 with nor flash on chip select 0 shown below. + +emc: memory-controller@40005000 { + compatible = "arm,pl172", "arm,primecell"; + reg = <0x40005000 0x1000>; + clocks = <&ccu1 CLK_CPU_EMCDIV>, <&ccu1 CLK_CPU_EMC>; + clock-names = "mpmcclk", "apb_pclk"; + #address-cells = <2>; + #size-cells = <1>; + ranges = <0 0 0x1c000000 0x1000000 + 1 0 0x1d000000 0x1000000 + 2 0 0x1e000000 0x1000000 + 3 0 0x1f000000 0x1000000>; + + cs0 { + #address-cells = <2>; + #size-cells = <1>; + ranges; + + mpmc,cs = <0>; + mpmc,memory-width = <16>; + mpmc,byte-lane-low; + mpmc,write-enable-delay = <0>; + mpmc,output-enable-delay = <0>; + mpmc,read-enable-delay = <70>; + mpmc,page-mode-read-delay = <70>; + + flash@0,0 { + compatible = "sst,sst39vf320", "cfi-flash"; + reg = <0 0 0x400000>; + bank-width = <2>; + #address-cells = <1>; + #size-cells = <1>; + partition@0 { + label = "data"; + reg = <0 0x400000>; + }; + }; + }; +}; diff --git a/Documentation/devicetree/bindings/reset/ath79-reset.txt b/Documentation/devicetree/bindings/reset/ath79-reset.txt new file mode 100644 index 0000000..4c56330 --- /dev/null +++ b/Documentation/devicetree/bindings/reset/ath79-reset.txt @@ -0,0 +1,20 @@ +Binding for Qualcomm Atheros AR7xxx/AR9XXX reset controller + +Please also refer to reset.txt in this directory for common reset +controller binding usage. + +Required Properties: +- compatible: has to be "qca,<soctype>-reset", "qca,ar7100-reset" + as fallback +- reg: Base address and size of the controllers memory area +- #reset-cells : Specifies the number of cells needed to encode reset + line, should be 1 + +Example: + + reset-controller@1806001c { + compatible = "qca,ar9132-reset", "qca,ar7100-reset"; + reg = <0x1806001c 0x4>; + + #reset-cells = <1>; + }; diff --git a/Documentation/devicetree/bindings/reset/nxp,lpc1850-rgu.txt b/Documentation/devicetree/bindings/reset/nxp,lpc1850-rgu.txt new file mode 100644 index 0000000..b4e96a2 --- /dev/null +++ b/Documentation/devicetree/bindings/reset/nxp,lpc1850-rgu.txt @@ -0,0 +1,84 @@ +NXP LPC1850 Reset Generation Unit (RGU) +======================================== + +Please also refer to reset.txt in this directory for common reset +controller binding usage. + +Required properties: +- compatible: Should be "nxp,lpc1850-rgu" +- reg: register base and length +- clocks: phandle and clock specifier to RGU clocks +- clock-names: should contain "delay" and "reg" +- #reset-cells: should be 1 + +See table below for valid peripheral reset numbers. Numbers not +in the table below are either reserved or not applicable for +normal operation. + +Reset Peripheral + 9 System control unit (SCU) + 12 ARM Cortex-M0 subsystem core (LPC43xx only) + 13 CPU core + 16 LCD controller + 17 USB0 + 18 USB1 + 19 DMA + 20 SDIO + 21 External memory controller (EMC) + 22 Ethernet + 25 Flash bank A + 27 EEPROM + 28 GPIO + 29 Flash bank B + 32 Timer0 + 33 Timer1 + 34 Timer2 + 35 Timer3 + 36 Repetitive Interrupt timer (RIT) + 37 State Configurable Timer (SCT) + 38 Motor control PWM (MCPWM) + 39 QEI + 40 ADC0 + 41 ADC1 + 42 DAC + 44 USART0 + 45 UART1 + 46 USART2 + 47 USART3 + 48 I2C0 + 49 I2C1 + 50 SSP0 + 51 SSP1 + 52 I2S0 and I2S1 + 53 Serial Flash Interface (SPIFI) + 54 C_CAN1 + 55 C_CAN0 + 56 ARM Cortex-M0 application core (LPC4370 only) + 57 SGPIO (LPC43xx only) + 58 SPI (LPC43xx only) + 60 ADCHS (12-bit ADC) (LPC4370 only) + +Refer to NXP LPC18xx or LPC43xx user manual for more details about +the reset signals and the connected block/peripheral. + +Reset provider example: +rgu: reset-controller@40053000 { + compatible = "nxp,lpc1850-rgu"; + reg = <0x40053000 0x1000>; + clocks = <&cgu BASE_SAFE_CLK>, <&ccu1 CLK_CPU_BUS>; + clock-names = "delay", "reg"; + #reset-cells = <1>; +}; + +Reset consumer example: +mac: ethernet@40010000 { + compatible = "nxp,lpc1850-dwmac", "snps,dwmac-3.611", "snps,dwmac"; + reg = <0x40010000 0x2000>; + interrupts = <5>; + interrupt-names = "macirq"; + clocks = <&ccu1 CLK_CPU_ETHERNET>; + clock-names = "stmmaceth"; + resets = <&rgu 22>; + reset-names = "stmmaceth"; + status = "disabled"; +}; diff --git a/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt b/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt index 54ae9f7..9ca2776 100644 --- a/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt +++ b/Documentation/devicetree/bindings/reset/st,sti-picophyreset.txt @@ -39,4 +39,4 @@ Example: }; Macro definitions for the supported reset channels can be found in: -include/dt-bindings/reset-controller/stih407-resets.h +include/dt-bindings/reset/stih407-resets.h diff --git a/Documentation/devicetree/bindings/reset/st,sti-powerdown.txt b/Documentation/devicetree/bindings/reset/st,sti-powerdown.txt index 5ab26b7..1cfd21d 100644 --- a/Documentation/devicetree/bindings/reset/st,sti-powerdown.txt +++ b/Documentation/devicetree/bindings/reset/st,sti-powerdown.txt @@ -43,5 +43,5 @@ example: Macro definitions for the supported reset channels can be found in: -include/dt-bindings/reset-controller/stih415-resets.h -include/dt-bindings/reset-controller/stih416-resets.h +include/dt-bindings/reset/stih415-resets.h +include/dt-bindings/reset/stih416-resets.h diff --git a/Documentation/devicetree/bindings/reset/st,sti-softreset.txt b/Documentation/devicetree/bindings/reset/st,sti-softreset.txt index a8d3d3c..891a2fd 100644 --- a/Documentation/devicetree/bindings/reset/st,sti-softreset.txt +++ b/Documentation/devicetree/bindings/reset/st,sti-softreset.txt @@ -42,5 +42,5 @@ example: Macro definitions for the supported reset channels can be found in: -include/dt-bindings/reset-controller/stih415-resets.h -include/dt-bindings/reset-controller/stih416-resets.h +include/dt-bindings/reset/stih415-resets.h +include/dt-bindings/reset/stih416-resets.h diff --git a/Documentation/devicetree/bindings/reset/zynq-reset.txt b/Documentation/devicetree/bindings/reset/zynq-reset.txt new file mode 100644 index 0000000..5860120 --- /dev/null +++ b/Documentation/devicetree/bindings/reset/zynq-reset.txt @@ -0,0 +1,68 @@ +Xilinx Zynq Reset Manager + +The Zynq AP-SoC has several different resets. + +See Chapter 26 of the Zynq TRM (UG585) for more information about Zynq resets. + +Required properties: +- compatible: "xlnx,zynq-reset" +- reg: SLCR offset and size taken via syscon <0x200 0x48> +- syscon: <&slcr> + This should be a phandle to the Zynq's SLCR registers. +- #reset-cells: Must be 1 + +The Zynq Reset Manager needs to be a childnode of the SLCR. + +Example: + rstc: rstc@200 { + compatible = "xlnx,zynq-reset"; + reg = <0x200 0x48>; + #reset-cells = <1>; + syscon = <&slcr>; + }; + +Reset outputs: + 0 : soft reset + 32 : ddr reset + 64 : topsw reset + 96 : dmac reset + 128: usb0 reset + 129: usb1 reset + 160: gem0 reset + 161: gem1 reset + 164: gem0 rx reset + 165: gem1 rx reset + 166: gem0 ref reset + 167: gem1 ref reset + 192: sdio0 reset + 193: sdio1 reset + 196: sdio0 ref reset + 197: sdio1 ref reset + 224: spi0 reset + 225: spi1 reset + 226: spi0 ref reset + 227: spi1 ref reset + 256: can0 reset + 257: can1 reset + 258: can0 ref reset + 259: can1 ref reset + 288: i2c0 reset + 289: i2c1 reset + 320: uart0 reset + 321: uart1 reset + 322: uart0 ref reset + 323: uart1 ref reset + 352: gpio reset + 384: lqspi reset + 385: qspi ref reset + 416: smc reset + 417: smc ref reset + 448: ocm reset + 512: fpga0 out reset + 513: fpga1 out reset + 514: fpga2 out reset + 515: fpga3 out reset + 544: a9 reset 0 + 545: a9 reset 1 + 552: peri reset + diff --git a/Documentation/devicetree/bindings/soc/qcom,smd-rpm.txt b/Documentation/devicetree/bindings/soc/qcom,smd-rpm.txt new file mode 100644 index 0000000..e27f5c4 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom,smd-rpm.txt @@ -0,0 +1,117 @@ +Qualcomm Resource Power Manager (RPM) over SMD + +This driver is used to interface with the Resource Power Manager (RPM) found in +various Qualcomm platforms. The RPM allows each component in the system to vote +for state of the system resources, such as clocks, regulators and bus +frequencies. + +- compatible: + Usage: required + Value type: <string> + Definition: must be one of: + "qcom,rpm-msm8974" + +- qcom,smd-channels: + Usage: required + Value type: <stringlist> + Definition: Shared Memory channel used for communication with the RPM + += SUBDEVICES + +The RPM exposes resources to its subnodes. The below bindings specify the set +of valid subnodes that can operate on these resources. + +== Regulators + +Regulator nodes are identified by their compatible: + +- compatible: + Usage: required + Value type: <string> + Definition: must be one of: + "qcom,rpm-pm8841-regulators" + "qcom,rpm-pm8941-regulators" + +- vdd_s1-supply: +- vdd_s2-supply: +- vdd_s3-supply: +- vdd_s4-supply: +- vdd_s5-supply: +- vdd_s6-supply: +- vdd_s7-supply: +- vdd_s8-supply: + Usage: optional (pm8841 only) + Value type: <phandle> + Definition: reference to regulator supplying the input pin, as + described in the data sheet + +- vdd_s1-supply: +- vdd_s2-supply: +- vdd_s3-supply: +- vdd_l1_l3-supply: +- vdd_l2_lvs1_2_3-supply: +- vdd_l4_l11-supply: +- vdd_l5_l7-supply: +- vdd_l6_l12_l14_l15-supply: +- vdd_l8_l16_l18_l19-supply: +- vdd_l9_l10_l17_l22-supply: +- vdd_l13_l20_l23_l24-supply: +- vdd_l21-supply: +- vin_5vs-supply: + Usage: optional (pm8941 only) + Value type: <phandle> + Definition: reference to regulator supplying the input pin, as + described in the data sheet + +The regulator node houses sub-nodes for each regulator within the device. Each +sub-node is identified using the node's name, with valid values listed for each +of the pmics below. + +pm8841: + s1, s2, s3, s4, s5, s6, s7, s8 + +pm8941: + s1, s2, s3, s4, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11, l12, l13, + l14, l15, l16, l17, l18, l19, l20, l21, l22, l23, l24, lvs1, lvs2, + lvs3, 5vs1, 5vs2 + +The content of each sub-node is defined by the standard binding for regulators - +see regulator.txt. + += EXAMPLE + + smd { + compatible = "qcom,smd"; + + rpm { + interrupts = <0 168 1>; + qcom,ipc = <&apcs 8 0>; + qcom,smd-edge = <15>; + + rpm_requests { + compatible = "qcom,rpm-msm8974"; + qcom,smd-channels = "rpm_requests"; + + pm8941-regulators { + compatible = "qcom,rpm-pm8941-regulators"; + vdd_l13_l20_l23_l24-supply = <&pm8941_boost>; + + pm8941_s3: s3 { + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + }; + + pm8941_boost: s4 { + regulator-min-microvolt = <5000000>; + regulator-max-microvolt = <5000000>; + }; + + pm8941_l20: l20 { + regulator-min-microvolt = <2950000>; + regulator-max-microvolt = <2950000>; + }; + }; + }; + }; + }; + diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt new file mode 100644 index 0000000..f65c76d --- /dev/null +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smd.txt @@ -0,0 +1,79 @@ +Qualcomm Shared Memory Driver (SMD) binding + +This binding describes the Qualcomm Shared Memory Driver, a fifo based +communication channel for sending data between the various subsystems in +Qualcomm platforms. + +- compatible: + Usage: required + Value type: <stringlist> + Definition: must be "qcom,smd" + += EDGES + +Each subnode of the SMD node represents a remote subsystem or a remote +processor of some sort - or in SMD language an "edge". The name of the edges +are not important. +The edge is described by the following properties: + +- interrupts: + Usage: required + Value type: <prop-encoded-array> + Definition: should specify the IRQ used by the remote processor to + signal this processor about communication related updates + +- qcom,ipc: + Usage: required + Value type: <prop-encoded-array> + Definition: three entries specifying the outgoing ipc bit used for + signaling the remote processor: + - phandle to a syscon node representing the apcs registers + - u32 representing offset to the register within the syscon + - u32 representing the ipc bit within the register + +- qcom,smd-edge: + Usage: required + Value type: <u32> + Definition: the identifier of the remote processor in the smd channel + allocation table + += SMD DEVICES + +In turn, subnodes of the "edges" represent devices tied to SMD channels on that +"edge". The names of the devices are not important. The properties of these +nodes are defined by the individual bindings for the SMD devices - but must +contain the following property: + +- qcom,smd-channels: + Usage: required + Value type: <stringlist> + Definition: a list of channels tied to this device, used for matching + the device to channels + += EXAMPLE + +The following example represents a smd node, with one edge representing the +"rpm" subsystem. For the "rpm" subsystem we have a device tied to the +"rpm_request" channel. + + apcs: syscon@f9011000 { + compatible = "syscon"; + reg = <0xf9011000 0x1000>; + }; + + smd { + compatible = "qcom,smd"; + + rpm { + interrupts = <0 168 1>; + qcom,ipc = <&apcs 8 0>; + qcom,smd-edge = <15>; + + rpm_requests { + compatible = "qcom,rpm-msm8974"; + qcom,smd-channels = "rpm_requests"; + + ... + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index b772b85..248b46b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8613,6 +8613,7 @@ M: Philipp Zabel <p.zabel@pengutronix.de> S: Maintained F: drivers/reset/ F: Documentation/devicetree/bindings/reset/ +F: include/dt-bindings/reset/ F: include/linux/reset.h F: include/linux/reset-controller.h diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi index 838b812..eab3477 100644 --- a/arch/arm/boot/dts/stih407-family.dtsi +++ b/arch/arm/boot/dts/stih407-family.dtsi @@ -9,7 +9,7 @@ #include "stih407-pinctrl.dtsi" #include <dt-bindings/mfd/st-lpc.h> #include <dt-bindings/phy/phy.h> -#include <dt-bindings/reset-controller/stih407-resets.h> +#include <dt-bindings/reset/stih407-resets.h> #include <dt-bindings/interrupt-controller/irq-st.h> / { #address-cells = <1>; diff --git a/arch/arm/boot/dts/stih415.dtsi b/arch/arm/boot/dts/stih415.dtsi index 19b019b..12427e6 100644 --- a/arch/arm/boot/dts/stih415.dtsi +++ b/arch/arm/boot/dts/stih415.dtsi @@ -10,7 +10,7 @@ #include "stih415-clock.dtsi" #include "stih415-pinctrl.dtsi" #include <dt-bindings/interrupt-controller/arm-gic.h> -#include <dt-bindings/reset-controller/stih415-resets.h> +#include <dt-bindings/reset/stih415-resets.h> / { L2: cache-controller { diff --git a/arch/arm/boot/dts/stih416.dtsi b/arch/arm/boot/dts/stih416.dtsi index 9dca173..9e3170c 100644 --- a/arch/arm/boot/dts/stih416.dtsi +++ b/arch/arm/boot/dts/stih416.dtsi @@ -12,7 +12,7 @@ #include <dt-bindings/phy/phy.h> #include <dt-bindings/interrupt-controller/arm-gic.h> -#include <dt-bindings/reset-controller/stih416-resets.h> +#include <dt-bindings/reset/stih416-resets.h> #include <dt-bindings/interrupt-controller/irq-st.h> / { L2: cache-controller { diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig index 9747316..c86a5a0 100644 --- a/arch/arm/mach-mvebu/Kconfig +++ b/arch/arm/mach-mvebu/Kconfig @@ -96,6 +96,7 @@ config MACH_DOVE select MACH_MVEBU_ANY select ORION_IRQCHIP select ORION_TIMER + select PM_GENERIC_DOMAINS if PM select PINCTRL_DOVE help Say 'Y' here if you want your kernel to support the diff --git a/arch/arm/mach-mvebu/dove.c b/arch/arm/mach-mvebu/dove.c index 5a17415..1aebb82 100644 --- a/arch/arm/mach-mvebu/dove.c +++ b/arch/arm/mach-mvebu/dove.c @@ -12,6 +12,7 @@ #include <linux/mbus.h> #include <linux/of.h> #include <linux/of_platform.h> +#include <linux/soc/dove/pmu.h> #include <asm/hardware/cache-tauros2.h> #include <asm/mach/arch.h> #include "common.h" @@ -24,6 +25,7 @@ static void __init dove_init(void) tauros2_init(0); #endif BUG_ON(mvebu_mbus_dt_init(false)); + dove_init_pmu(); of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig index aa38a43..926e336 100644 --- a/arch/arm/mach-shmobile/Kconfig +++ b/arch/arm/mach-shmobile/Kconfig @@ -4,6 +4,7 @@ config ARCH_SHMOBILE config PM_RCAR bool + select PM_GENERIC_DOMAINS if PM config PM_RMOBILE bool @@ -50,6 +51,7 @@ config ARCH_EMEV2 config ARCH_R7S72100 bool "RZ/A1H (R7S72100)" + select PM_GENERIC_DOMAINS if PM select SYS_SUPPORTS_SH_MTU2 config ARCH_R8A73A4 diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c index 155807f..9157546 100644 --- a/arch/arm/mach-tegra/cpuidle-tegra114.c +++ b/arch/arm/mach-tegra/cpuidle-tegra114.c @@ -24,6 +24,7 @@ #include <asm/cpuidle.h> #include <asm/smp_plat.h> #include <asm/suspend.h> +#include <asm/psci.h> #include "pm.h" #include "sleep.h" @@ -44,16 +45,12 @@ static int tegra114_idle_power_down(struct cpuidle_device *dev, tegra_set_cpu_in_lp2(); cpu_pm_enter(); - tick_broadcast_enter(); - call_firmware_op(prepare_idle); /* Do suspend by ourselves if the firmware does not implement it */ if (call_firmware_op(do_idle, 0) == -ENOSYS) cpu_suspend(0, tegra30_sleep_cpu_secondary_finish); - tick_broadcast_exit(); - cpu_pm_exit(); tegra_clear_cpu_in_lp2(); @@ -61,6 +58,13 @@ static int tegra114_idle_power_down(struct cpuidle_device *dev, return index; } + +static void tegra114_idle_enter_freeze(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + tegra114_idle_power_down(dev, drv, index); +} #endif static struct cpuidle_driver tegra_idle_driver = { @@ -72,8 +76,10 @@ static struct cpuidle_driver tegra_idle_driver = { #ifdef CONFIG_PM_SLEEP [1] = { .enter = tegra114_idle_power_down, + .enter_freeze = tegra114_idle_enter_freeze, .exit_latency = 500, .target_residency = 1000, + .flags = CPUIDLE_FLAG_TIMER_STOP, .power_usage = 0, .name = "powered-down", .desc = "CPU power gated", @@ -84,5 +90,8 @@ static struct cpuidle_driver tegra_idle_driver = { int __init tegra114_cpuidle_init(void) { - return cpuidle_register(&tegra_idle_driver, NULL); + if (!psci_smp_available()) + return cpuidle_register(&tegra_idle_driver, NULL); + + return 0; } diff --git a/arch/arm/mach-tegra/iomap.h b/arch/arm/mach-tegra/iomap.h index 81dc950..9e5b2f8 100644 --- a/arch/arm/mach-tegra/iomap.h +++ b/arch/arm/mach-tegra/iomap.h @@ -82,9 +82,6 @@ #define TEGRA_EMC_BASE 0x7000F400 #define TEGRA_EMC_SIZE SZ_1K -#define TEGRA_FUSE_BASE 0x7000F800 -#define TEGRA_FUSE_SIZE SZ_1K - #define TEGRA_EMC0_BASE 0x7001A000 #define TEGRA_EMC0_SIZE SZ_2K diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 199a835..c6d28bc 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -118,6 +118,7 @@ config ATH25 config ATH79 bool "Atheros AR71XX/AR724X/AR913X based boards" + select ARCH_HAS_RESET_CONTROLLER select ARCH_REQUIRE_GPIOLIB select BOOT_RAW select CEVT_R4K diff --git a/arch/mips/boot/dts/qca/ar9132.dtsi b/arch/mips/boot/dts/qca/ar9132.dtsi index 4759cff..fb7734e 100644 --- a/arch/mips/boot/dts/qca/ar9132.dtsi +++ b/arch/mips/boot/dts/qca/ar9132.dtsi @@ -115,6 +115,14 @@ interrupt-controller; #interrupt-cells = <1>; }; + + rst: reset-controller@1806001c { + compatible = "qca,ar9132-reset", + "qca,ar7100-reset"; + reg = <0x1806001c 0x4>; + + #reset-cells = <1>; + }; }; spi@1f000000 { diff --git a/drivers/clk/shmobile/clk-mstp.c b/drivers/clk/shmobile/clk-mstp.c index 2d2fe77..b1df7b2 100644 --- a/drivers/clk/shmobile/clk-mstp.c +++ b/drivers/clk/shmobile/clk-mstp.c @@ -2,6 +2,7 @@ * R-Car MSTP clocks * * Copyright (C) 2013 Ideas On Board SPRL + * Copyright (C) 2015 Glider bvba * * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> * @@ -10,11 +11,16 @@ * the Free Software Foundation; version 2 of the License. */ +#include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/clkdev.h> +#include <linux/clk/shmobile.h> +#include <linux/device.h> #include <linux/io.h> #include <linux/of.h> #include <linux/of_address.h> +#include <linux/pm_clock.h> +#include <linux/pm_domain.h> #include <linux/spinlock.h> /* @@ -236,3 +242,84 @@ static void __init cpg_mstp_clocks_init(struct device_node *np) of_clk_add_provider(np, of_clk_src_onecell_get, &group->data); } CLK_OF_DECLARE(cpg_mstp_clks, "renesas,cpg-mstp-clocks", cpg_mstp_clocks_init); + + +#ifdef CONFIG_PM_GENERIC_DOMAINS_OF +int cpg_mstp_attach_dev(struct generic_pm_domain *domain, struct device *dev) +{ + struct device_node *np = dev->of_node; + struct of_phandle_args clkspec; + struct clk *clk; + int i = 0; + int error; + + while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i, + &clkspec)) { + if (of_device_is_compatible(clkspec.np, + "renesas,cpg-mstp-clocks")) + goto found; + + of_node_put(clkspec.np); + i++; + } + + return 0; + +found: + clk = of_clk_get_from_provider(&clkspec); + of_node_put(clkspec.np); + + if (IS_ERR(clk)) + return PTR_ERR(clk); + + error = pm_clk_create(dev); + if (error) { + dev_err(dev, "pm_clk_create failed %d\n", error); + goto fail_put; + } + + error = pm_clk_add_clk(dev, clk); + if (error) { + dev_err(dev, "pm_clk_add_clk %pC failed %d\n", clk, error); + goto fail_destroy; + } + + return 0; + +fail_destroy: + pm_clk_destroy(dev); +fail_put: + clk_put(clk); + return error; +} + +void cpg_mstp_detach_dev(struct generic_pm_domain *domain, struct device *dev) +{ + if (!list_empty(&dev->power.subsys_data->clock_list)) + pm_clk_destroy(dev); +} + +void __init cpg_mstp_add_clk_domain(struct device_node *np) +{ + struct generic_pm_domain *pd; + u32 ncells; + + if (of_property_read_u32(np, "#power-domain-cells", &ncells)) { + pr_warn("%s lacks #power-domain-cells\n", np->full_name); + return; + } + + pd = kzalloc(sizeof(*pd), GFP_KERNEL); + if (!pd) + return; + + pd->name = np->name; + + pd->flags = GENPD_FLAG_PM_CLK; + pm_genpd_init(pd, &simple_qos_governor, false); + pd->attach_dev = cpg_mstp_attach_dev; + pd->detach_dev = cpg_mstp_detach_dev; + + of_genpd_add_provider_simple(np, pd); +} +#endif /* !CONFIG_PM_GENERIC_DOMAINS_OF */ diff --git a/drivers/clk/shmobile/clk-r8a7778.c b/drivers/clk/shmobile/clk-r8a7778.c index e97e28f..87c1d2f 100644 --- a/drivers/clk/shmobile/clk-r8a7778.c +++ b/drivers/clk/shmobile/clk-r8a7778.c @@ -124,6 +124,8 @@ static void __init r8a7778_cpg_clocks_init(struct device_node *np) } of_clk_add_provider(np, of_clk_src_onecell_get, &cpg->data); + + cpg_mstp_add_clk_domain(np); } CLK_OF_DECLARE(r8a7778_cpg_clks, "renesas,r8a7778-cpg-clocks", diff --git a/drivers/clk/shmobile/clk-r8a7779.c b/drivers/clk/shmobile/clk-r8a7779.c index af29796..92275c5f 100644 --- a/drivers/clk/shmobile/clk-r8a7779.c +++ b/drivers/clk/shmobile/clk-r8a7779.c @@ -168,6 +168,8 @@ static void __init r8a7779_cpg_clocks_init(struct device_node *np) } of_clk_add_provider(np, of_clk_src_onecell_get, &cpg->data); + + cpg_mstp_add_clk_domain(np); } CLK_OF_DECLARE(r8a7779_cpg_clks, "renesas,r8a7779-cpg-clocks", r8a7779_cpg_clocks_init); diff --git a/drivers/clk/shmobile/clk-rcar-gen2.c b/drivers/clk/shmobile/clk-rcar-gen2.c index 9233ebf..745496f 100644 --- a/drivers/clk/shmobile/clk-rcar-gen2.c +++ b/drivers/clk/shmobile/clk-rcar-gen2.c @@ -415,6 +415,8 @@ static void __init rcar_gen2_cpg_clocks_init(struct device_node *np) } of_clk_add_provider(np, of_clk_src_onecell_get, &cpg->data); + + cpg_mstp_add_clk_domain(np); } CLK_OF_DECLARE(rcar_gen2_cpg_clks, "renesas,rcar-gen2-cpg-clocks", rcar_gen2_cpg_clocks_init); diff --git a/drivers/clk/shmobile/clk-rz.c b/drivers/clk/shmobile/clk-rz.c index 7e68e86..9766e3c 100644 --- a/drivers/clk/shmobile/clk-rz.c +++ b/drivers/clk/shmobile/clk-rz.c @@ -10,6 +10,7 @@ */ #include <linux/clk-provider.h> +#include <linux/clk/shmobile.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/of.h> @@ -99,5 +100,7 @@ static void __init rz_cpg_clocks_init(struct device_node *np) } of_clk_add_provider(np, of_clk_src_onecell_get, &cpg->data); + + cpg_mstp_add_clk_domain(np); } CLK_OF_DECLARE(rz_cpg_clks, "renesas,rz-cpg-clocks", rz_cpg_clocks_init); diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index cc8a71c..24e5c66 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -247,12 +247,19 @@ config ARM_SPEAR_CPUFREQ help This adds the CPUFreq driver support for SPEAr SOCs. -config ARM_TEGRA_CPUFREQ - bool "TEGRA CPUFreq support" +config ARM_TEGRA20_CPUFREQ + bool "Tegra20 CPUFreq support" depends on ARCH_TEGRA default y help - This adds the CPUFreq driver support for TEGRA SOCs. + This adds the CPUFreq driver support for Tegra20 SOCs. + +config ARM_TEGRA124_CPUFREQ + tristate "Tegra124 CPUFreq support" + depends on ARCH_TEGRA && CPUFREQ_DT + default y + help + This adds the CPUFreq driver support for Tegra124 SOCs. config ARM_PXA2xx_CPUFREQ tristate "Intel PXA2xx CPUfreq driver" diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index 2169bf7..032745d 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -76,7 +76,8 @@ obj-$(CONFIG_ARM_S5PV210_CPUFREQ) += s5pv210-cpufreq.o obj-$(CONFIG_ARM_SA1100_CPUFREQ) += sa1100-cpufreq.o obj-$(CONFIG_ARM_SA1110_CPUFREQ) += sa1110-cpufreq.o obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o -obj-$(CONFIG_ARM_TEGRA_CPUFREQ) += tegra-cpufreq.o +obj-$(CONFIG_ARM_TEGRA20_CPUFREQ) += tegra20-cpufreq.o +obj-$(CONFIG_ARM_TEGRA124_CPUFREQ) += tegra124-cpufreq.o obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ) += vexpress-spc-cpufreq.o ################################################################################## diff --git a/drivers/cpufreq/tegra124-cpufreq.c b/drivers/cpufreq/tegra124-cpufreq.c new file mode 100644 index 0000000..20bcceb --- /dev/null +++ b/drivers/cpufreq/tegra124-cpufreq.c @@ -0,0 +1,214 @@ +/* + * Tegra 124 cpufreq driver + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/clk.h> +#include <linux/cpufreq-dt.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_opp.h> +#include <linux/regulator/consumer.h> +#include <linux/types.h> + +struct tegra124_cpufreq_priv { + struct regulator *vdd_cpu_reg; + struct clk *cpu_clk; + struct clk *pllp_clk; + struct clk *pllx_clk; + struct clk *dfll_clk; + struct platform_device *cpufreq_dt_pdev; +}; + +static int tegra124_cpu_switch_to_dfll(struct tegra124_cpufreq_priv *priv) +{ + struct clk *orig_parent; + int ret; + + ret = clk_set_rate(priv->dfll_clk, clk_get_rate(priv->cpu_clk)); + if (ret) + return ret; + + orig_parent = clk_get_parent(priv->cpu_clk); + clk_set_parent(priv->cpu_clk, priv->pllp_clk); + + ret = clk_prepare_enable(priv->dfll_clk); + if (ret) + goto out; + + clk_set_parent(priv->cpu_clk, priv->dfll_clk); + + return 0; + +out: + clk_set_parent(priv->cpu_clk, orig_parent); + + return ret; +} + +static void tegra124_cpu_switch_to_pllx(struct tegra124_cpufreq_priv *priv) +{ + clk_set_parent(priv->cpu_clk, priv->pllp_clk); + clk_disable_unprepare(priv->dfll_clk); + regulator_sync_voltage(priv->vdd_cpu_reg); + clk_set_parent(priv->cpu_clk, priv->pllx_clk); +} + +static struct cpufreq_dt_platform_data cpufreq_dt_pd = { + .independent_clocks = false, +}; + +static int tegra124_cpufreq_probe(struct platform_device *pdev) +{ + struct tegra124_cpufreq_priv *priv; + struct device_node *np; + struct device *cpu_dev; + struct platform_device_info cpufreq_dt_devinfo = {}; + int ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + cpu_dev = get_cpu_device(0); + if (!cpu_dev) + return -ENODEV; + + np = of_cpu_device_node_get(0); + if (!np) + return -ENODEV; + + priv->vdd_cpu_reg = regulator_get(cpu_dev, "vdd-cpu"); + if (IS_ERR(priv->vdd_cpu_reg)) { + ret = PTR_ERR(priv->vdd_cpu_reg); + goto out_put_np; + } + + priv->cpu_clk = of_clk_get_by_name(np, "cpu_g"); + if (IS_ERR(priv->cpu_clk)) { + ret = PTR_ERR(priv->cpu_clk); + goto out_put_vdd_cpu_reg; + } + + priv->dfll_clk = of_clk_get_by_name(np, "dfll"); + if (IS_ERR(priv->dfll_clk)) { + ret = PTR_ERR(priv->dfll_clk); + goto out_put_cpu_clk; + } + + priv->pllx_clk = of_clk_get_by_name(np, "pll_x"); + if (IS_ERR(priv->pllx_clk)) { + ret = PTR_ERR(priv->pllx_clk); + goto out_put_dfll_clk; + } + + priv->pllp_clk = of_clk_get_by_name(np, "pll_p"); + if (IS_ERR(priv->pllp_clk)) { + ret = PTR_ERR(priv->pllp_clk); + goto out_put_pllx_clk; + } + + ret = tegra124_cpu_switch_to_dfll(priv); + if (ret) + goto out_put_pllp_clk; + + cpufreq_dt_devinfo.name = "cpufreq-dt"; + cpufreq_dt_devinfo.parent = &pdev->dev; + cpufreq_dt_devinfo.data = &cpufreq_dt_pd; + cpufreq_dt_devinfo.size_data = sizeof(cpufreq_dt_pd); + + priv->cpufreq_dt_pdev = + platform_device_register_full(&cpufreq_dt_devinfo); + if (IS_ERR(priv->cpufreq_dt_pdev)) { + ret = PTR_ERR(priv->cpufreq_dt_pdev); + goto out_switch_to_pllx; + } + + platform_set_drvdata(pdev, priv); + + return 0; + +out_switch_to_pllx: + tegra124_cpu_switch_to_pllx(priv); +out_put_pllp_clk: + clk_put(priv->pllp_clk); +out_put_pllx_clk: + clk_put(priv->pllx_clk); +out_put_dfll_clk: + clk_put(priv->dfll_clk); +out_put_cpu_clk: + clk_put(priv->cpu_clk); +out_put_vdd_cpu_reg: + regulator_put(priv->vdd_cpu_reg); +out_put_np: + of_node_put(np); + + return ret; +} + +static int tegra124_cpufreq_remove(struct platform_device *pdev) +{ + struct tegra124_cpufreq_priv *priv = platform_get_drvdata(pdev); + + platform_device_unregister(priv->cpufreq_dt_pdev); + tegra124_cpu_switch_to_pllx(priv); + + clk_put(priv->pllp_clk); + clk_put(priv->pllx_clk); + clk_put(priv->dfll_clk); + clk_put(priv->cpu_clk); + regulator_put(priv->vdd_cpu_reg); + + return 0; +} + +static struct platform_driver tegra124_cpufreq_platdrv = { + .driver.name = "cpufreq-tegra124", + .probe = tegra124_cpufreq_probe, + .remove = tegra124_cpufreq_remove, +}; + +static int __init tegra_cpufreq_init(void) +{ + int ret; + struct platform_device *pdev; + + if (!of_machine_is_compatible("nvidia,tegra124")) + return -ENODEV; + + /* + * Platform driver+device required for handling EPROBE_DEFER with + * the regulator and the DFLL clock + */ + ret = platform_driver_register(&tegra124_cpufreq_platdrv); + if (ret) + return ret; + + pdev = platform_device_register_simple("cpufreq-tegra124", -1, NULL, 0); + if (IS_ERR(pdev)) { + platform_driver_unregister(&tegra124_cpufreq_platdrv); + return PTR_ERR(pdev); + } + + return 0; +} +module_init(tegra_cpufreq_init); + +MODULE_AUTHOR("Tuomas Tynkkynen <ttynkkynen@nvidia.com>"); +MODULE_DESCRIPTION("cpufreq driver for NVIDIA Tegra124"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra20-cpufreq.c index 8084c7f..8084c7f 100644 --- a/drivers/cpufreq/tegra-cpufreq.c +++ b/drivers/cpufreq/tegra20-cpufreq.c diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index f1fb1d3..f491aec 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -222,7 +222,7 @@ config TEGRA_IOMMU_SMMU select IOMMU_API help This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra - SoCs (Tegra30 up to Tegra132). + SoCs (Tegra30 up to Tegra210). config EXYNOS_IOMMU bool "Exynos IOMMU Support" diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig index 8406c668..c6a644b 100644 --- a/drivers/memory/Kconfig +++ b/drivers/memory/Kconfig @@ -7,6 +7,14 @@ menuconfig MEMORY if MEMORY +config ARM_PL172_MPMC + tristate "ARM PL172 MPMC driver" + depends on ARM_AMBA && OF + help + This selects the ARM PrimeCell PL172 MultiPort Memory Controller. + If you have an embedded system with an AMBA bus and a PL172 + controller, say Y or M here. + config ATMEL_SDRAMC bool "Atmel (Multi-port DDR-)SDRAM Controller" default y diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile index b670441..1c46af5 100644 --- a/drivers/memory/Makefile +++ b/drivers/memory/Makefile @@ -5,6 +5,7 @@ ifeq ($(CONFIG_DDR),y) obj-$(CONFIG_OF) += of_memory.o endif +obj-$(CONFIG_ARM_PL172_MPMC) += pl172.o obj-$(CONFIG_ATMEL_SDRAMC) += atmel-sdramc.o obj-$(CONFIG_TI_AEMIF) += ti-aemif.o obj-$(CONFIG_TI_EMIF) += emif.o diff --git a/drivers/memory/pl172.c b/drivers/memory/pl172.c new file mode 100644 index 0000000..b2ef607 --- /dev/null +++ b/drivers/memory/pl172.c @@ -0,0 +1,301 @@ +/* + * Memory controller driver for ARM PrimeCell PL172 + * PrimeCell MultiPort Memory Controller (PL172) + * + * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com> + * + * Based on: + * TI AEMIF driver, Copyright (C) 2010 - 2013 Texas Instruments Inc. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/amba/bus.h> +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/time.h> + +#define MPMC_STATIC_CFG(n) (0x200 + 0x20 * n) +#define MPMC_STATIC_CFG_MW_8BIT 0x0 +#define MPMC_STATIC_CFG_MW_16BIT 0x1 +#define MPMC_STATIC_CFG_MW_32BIT 0x2 +#define MPMC_STATIC_CFG_PM BIT(3) +#define MPMC_STATIC_CFG_PC BIT(6) +#define MPMC_STATIC_CFG_PB BIT(7) +#define MPMC_STATIC_CFG_EW BIT(8) +#define MPMC_STATIC_CFG_B BIT(19) +#define MPMC_STATIC_CFG_P BIT(20) +#define MPMC_STATIC_WAIT_WEN(n) (0x204 + 0x20 * n) +#define MPMC_STATIC_WAIT_WEN_MAX 0x0f +#define MPMC_STATIC_WAIT_OEN(n) (0x208 + 0x20 * n) +#define MPMC_STATIC_WAIT_OEN_MAX 0x0f +#define MPMC_STATIC_WAIT_RD(n) (0x20c + 0x20 * n) +#define MPMC_STATIC_WAIT_RD_MAX 0x1f +#define MPMC_STATIC_WAIT_PAGE(n) (0x210 + 0x20 * n) +#define MPMC_STATIC_WAIT_PAGE_MAX 0x1f +#define MPMC_STATIC_WAIT_WR(n) (0x214 + 0x20 * n) +#define MPMC_STATIC_WAIT_WR_MAX 0x1f +#define MPMC_STATIC_WAIT_TURN(n) (0x218 + 0x20 * n) +#define MPMC_STATIC_WAIT_TURN_MAX 0x0f + +/* Maximum number of static chip selects */ +#define PL172_MAX_CS 4 + +struct pl172_data { + void __iomem *base; + unsigned long rate; + struct clk *clk; +}; + +static int pl172_timing_prop(struct amba_device *adev, + const struct device_node *np, const char *name, + u32 reg_offset, u32 max, int start) +{ + struct pl172_data *pl172 = amba_get_drvdata(adev); + int cycles; + u32 val; + + if (!of_property_read_u32(np, name, &val)) { + cycles = DIV_ROUND_UP(val * pl172->rate, NSEC_PER_MSEC) - start; + if (cycles < 0) { + cycles = 0; + } else if (cycles > max) { + dev_err(&adev->dev, "%s timing too tight\n", name); + return -EINVAL; + } + + writel(cycles, pl172->base + reg_offset); + } + + dev_dbg(&adev->dev, "%s: %u cycle(s)\n", name, start + + readl(pl172->base + reg_offset)); + + return 0; +} + +static int pl172_setup_static(struct amba_device *adev, + struct device_node *np, u32 cs) +{ + struct pl172_data *pl172 = amba_get_drvdata(adev); + u32 cfg; + int ret; + + /* MPMC static memory configuration */ + if (!of_property_read_u32(np, "mpmc,memory-width", &cfg)) { + if (cfg == 8) { + cfg = MPMC_STATIC_CFG_MW_8BIT; + } else if (cfg == 16) { + cfg = MPMC_STATIC_CFG_MW_16BIT; + } else if (cfg == 32) { + cfg = MPMC_STATIC_CFG_MW_32BIT; + } else { + dev_err(&adev->dev, "invalid memory width cs%u\n", cs); + return -EINVAL; + } + } else { + dev_err(&adev->dev, "memory-width property required\n"); + return -EINVAL; + } + + if (of_property_read_bool(np, "mpmc,async-page-mode")) + cfg |= MPMC_STATIC_CFG_PM; + + if (of_property_read_bool(np, "mpmc,cs-active-high")) + cfg |= MPMC_STATIC_CFG_PC; + + if (of_property_read_bool(np, "mpmc,byte-lane-low")) + cfg |= MPMC_STATIC_CFG_PB; + + if (of_property_read_bool(np, "mpmc,extended-wait")) + cfg |= MPMC_STATIC_CFG_EW; + + if (of_property_read_bool(np, "mpmc,buffer-enable")) + cfg |= MPMC_STATIC_CFG_B; + + if (of_property_read_bool(np, "mpmc,write-protect")) + cfg |= MPMC_STATIC_CFG_P; + + writel(cfg, pl172->base + MPMC_STATIC_CFG(cs)); + dev_dbg(&adev->dev, "mpmc static config cs%u: 0x%08x\n", cs, cfg); + + /* MPMC static memory timing */ + ret = pl172_timing_prop(adev, np, "mpmc,write-enable-delay", + MPMC_STATIC_WAIT_WEN(cs), + MPMC_STATIC_WAIT_WEN_MAX, 1); + if (ret) + goto fail; + + ret = pl172_timing_prop(adev, np, "mpmc,output-enable-delay", + MPMC_STATIC_WAIT_OEN(cs), + MPMC_STATIC_WAIT_OEN_MAX, 0); + if (ret) + goto fail; + + ret = pl172_timing_prop(adev, np, "mpmc,read-access-delay", + MPMC_STATIC_WAIT_RD(cs), + MPMC_STATIC_WAIT_RD_MAX, 1); + if (ret) + goto fail; + + ret = pl172_timing_prop(adev, np, "mpmc,page-mode-read-delay", + MPMC_STATIC_WAIT_PAGE(cs), + MPMC_STATIC_WAIT_PAGE_MAX, 1); + if (ret) + goto fail; + + ret = pl172_timing_prop(adev, np, "mpmc,write-access-delay", + MPMC_STATIC_WAIT_WR(cs), + MPMC_STATIC_WAIT_WR_MAX, 2); + if (ret) + goto fail; + + ret = pl172_timing_prop(adev, np, "mpmc,turn-round-delay", + MPMC_STATIC_WAIT_TURN(cs), + MPMC_STATIC_WAIT_TURN_MAX, 1); + if (ret) + goto fail; + + return 0; +fail: + dev_err(&adev->dev, "failed to configure cs%u\n", cs); + return ret; +} + +static int pl172_parse_cs_config(struct amba_device *adev, + struct device_node *np) +{ + u32 cs; + + if (!of_property_read_u32(np, "mpmc,cs", &cs)) { + if (cs >= PL172_MAX_CS) { + dev_err(&adev->dev, "cs%u invalid\n", cs); + return -EINVAL; + } + + return pl172_setup_static(adev, np, cs); + } + + dev_err(&adev->dev, "cs property required\n"); + + return -EINVAL; +} + +static const char * const pl172_revisions[] = {"r1", "r2", "r2p3", "r2p4"}; + +static int pl172_probe(struct amba_device *adev, const struct amba_id *id) +{ + struct device_node *child_np, *np = adev->dev.of_node; + struct device *dev = &adev->dev; + static const char *rev = "?"; + struct pl172_data *pl172; + int ret; + + if (amba_part(adev) == 0x172) { + if (amba_rev(adev) < ARRAY_SIZE(pl172_revisions)) + rev = pl172_revisions[amba_rev(adev)]; + } + + dev_info(dev, "ARM PL%x revision %s\n", amba_part(adev), rev); + + pl172 = devm_kzalloc(dev, sizeof(*pl172), GFP_KERNEL); + if (!pl172) + return -ENOMEM; + + pl172->clk = devm_clk_get(dev, "mpmcclk"); + if (IS_ERR(pl172->clk)) { + dev_err(dev, "no mpmcclk provided clock\n"); + return PTR_ERR(pl172->clk); + } + + ret = clk_prepare_enable(pl172->clk); + if (ret) { + dev_err(dev, "unable to mpmcclk enable clock\n"); + return ret; + } + + pl172->rate = clk_get_rate(pl172->clk) / MSEC_PER_SEC; + if (!pl172->rate) { + dev_err(dev, "unable to get mpmcclk clock rate\n"); + ret = -EINVAL; + goto err_clk_enable; + } + + ret = amba_request_regions(adev, NULL); + if (ret) { + dev_err(dev, "unable to request AMBA regions\n"); + goto err_clk_enable; + } + + pl172->base = devm_ioremap(dev, adev->res.start, + resource_size(&adev->res)); + if (!pl172->base) { + dev_err(dev, "ioremap failed\n"); + ret = -ENOMEM; + goto err_no_ioremap; + } + + amba_set_drvdata(adev, pl172); + + /* + * Loop through each child node, which represent a chip select, and + * configure parameters and timing. If successful; populate devices + * under that node. + */ + for_each_available_child_of_node(np, child_np) { + ret = pl172_parse_cs_config(adev, child_np); + if (ret) + continue; + + of_platform_populate(child_np, NULL, NULL, dev); + } + + return 0; + +err_no_ioremap: + amba_release_regions(adev); +err_clk_enable: + clk_disable_unprepare(pl172->clk); + return ret; +} + +static int pl172_remove(struct amba_device *adev) +{ + struct pl172_data *pl172 = amba_get_drvdata(adev); + + clk_disable_unprepare(pl172->clk); + amba_release_regions(adev); + + return 0; +} + +static const struct amba_id pl172_ids[] = { + { + .id = 0x07341172, + .mask = 0xffffffff, + }, + { 0, 0 }, +}; +MODULE_DEVICE_TABLE(amba, pl172_ids); + +static struct amba_driver pl172_driver = { + .drv = { + .name = "memory-pl172", + }, + .probe = pl172_probe, + .remove = pl172_remove, + .id_table = pl172_ids, +}; +module_amba_driver(pl172_driver); + +MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>"); +MODULE_DESCRIPTION("PL172 Memory Controller Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/memory/tegra/Makefile b/drivers/memory/tegra/Makefile index 6a0b9ac..c2cb671f 100644 --- a/drivers/memory/tegra/Makefile +++ b/drivers/memory/tegra/Makefile @@ -4,6 +4,7 @@ tegra-mc-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30.o tegra-mc-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114.o tegra-mc-$(CONFIG_ARCH_TEGRA_124_SOC) += tegra124.o tegra-mc-$(CONFIG_ARCH_TEGRA_132_SOC) += tegra124.o +tegra-mc-$(CONFIG_ARCH_TEGRA_210_SOC) += tegra210.o obj-$(CONFIG_TEGRA_MC) += tegra-mc.o diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index c71ede6..a1ae0cc 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -42,7 +42,6 @@ #define MC_ERR_STATUS_ADR_HI_MASK 0x3 #define MC_ERR_STATUS_SECURITY (1 << 17) #define MC_ERR_STATUS_RW (1 << 16) -#define MC_ERR_STATUS_CLIENT_MASK 0x7f #define MC_ERR_ADR 0x0c @@ -67,6 +66,9 @@ static const struct of_device_id tegra_mc_of_match[] = { #ifdef CONFIG_ARCH_TEGRA_132_SOC { .compatible = "nvidia,tegra132-mc", .data = &tegra132_mc_soc }, #endif +#ifdef CONFIG_ARCH_TEGRA_210_SOC + { .compatible = "nvidia,tegra210-mc", .data = &tegra210_mc_soc }, +#endif { } }; MODULE_DEVICE_TABLE(of, tegra_mc_of_match); @@ -283,7 +285,7 @@ static irqreturn_t tegra_mc_irq(int irq, void *data) else secure = ""; - id = value & MC_ERR_STATUS_CLIENT_MASK; + id = value & mc->soc->client_id_mask; for (i = 0; i < mc->soc->num_clients; i++) { if (mc->soc->clients[i].id == id) { @@ -410,6 +412,8 @@ static int tegra_mc_probe(struct platform_device *pdev) return err; } + WARN(!mc->soc->client_id_mask, "Missing client ID mask for this SoC\n"); + value = MC_INT_DECERR_MTS | MC_INT_SECERR_SEC | MC_INT_DECERR_VPR | MC_INT_INVALID_APB_ASID_UPDATE | MC_INT_INVALID_SMMU_PAGE | MC_INT_SECURITY_VIOLATION | MC_INT_DECERR_EMEM; diff --git a/drivers/memory/tegra/mc.h b/drivers/memory/tegra/mc.h index b7361b0..ddb1667 100644 --- a/drivers/memory/tegra/mc.h +++ b/drivers/memory/tegra/mc.h @@ -41,4 +41,8 @@ extern const struct tegra_mc_soc tegra124_mc_soc; extern const struct tegra_mc_soc tegra132_mc_soc; #endif +#ifdef CONFIG_ARCH_TEGRA_210_SOC +extern const struct tegra_mc_soc tegra210_mc_soc; +#endif + #endif /* MEMORY_TEGRA_MC_H */ diff --git a/drivers/memory/tegra/tegra114.c b/drivers/memory/tegra/tegra114.c index 9f57958..c8765db 100644 --- a/drivers/memory/tegra/tegra114.c +++ b/drivers/memory/tegra/tegra114.c @@ -944,5 +944,6 @@ const struct tegra_mc_soc tegra114_mc_soc = { .num_clients = ARRAY_SIZE(tegra114_mc_clients), .num_address_bits = 32, .atom_size = 32, + .client_id_mask = 0x7f, .smmu = &tegra114_smmu_soc, }; diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c index 8620355..3dac7be 100644 --- a/drivers/memory/tegra/tegra124-emc.c +++ b/drivers/memory/tegra/tegra124-emc.c @@ -1027,7 +1027,40 @@ static int emc_debug_rate_set(void *data, u64 rate) DEFINE_SIMPLE_ATTRIBUTE(emc_debug_rate_fops, emc_debug_rate_get, emc_debug_rate_set, "%lld\n"); -static void emc_debugfs_init(struct device *dev) +static int emc_debug_supported_rates_show(struct seq_file *s, void *data) +{ + struct tegra_emc *emc = s->private; + const char *prefix = ""; + unsigned int i; + + for (i = 0; i < emc->num_timings; i++) { + struct emc_timing *timing = &emc->timings[i]; + + seq_printf(s, "%s%lu", prefix, timing->rate); + + prefix = " "; + } + + seq_puts(s, "\n"); + + return 0; +} + +static int emc_debug_supported_rates_open(struct inode *inode, + struct file *file) +{ + return single_open(file, emc_debug_supported_rates_show, + inode->i_private); +} + +static const struct file_operations emc_debug_supported_rates_fops = { + .open = emc_debug_supported_rates_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void emc_debugfs_init(struct device *dev, struct tegra_emc *emc) { struct dentry *root, *file; struct clk *clk; @@ -1048,6 +1081,11 @@ static void emc_debugfs_init(struct device *dev) &emc_debug_rate_fops); if (!file) dev_err(dev, "failed to create debugfs entry\n"); + + file = debugfs_create_file("supported_rates", S_IRUGO, root, emc, + &emc_debug_supported_rates_fops); + if (!file) + dev_err(dev, "failed to create debugfs entry\n"); } static int tegra_emc_probe(struct platform_device *pdev) @@ -1119,7 +1157,7 @@ static int tegra_emc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, emc); if (IS_ENABLED(CONFIG_DEBUG_FS)) - emc_debugfs_init(&pdev->dev); + emc_debugfs_init(&pdev->dev, emc); return 0; }; diff --git a/drivers/memory/tegra/tegra124.c b/drivers/memory/tegra/tegra124.c index 966e155..060fb3d 100644 --- a/drivers/memory/tegra/tegra124.c +++ b/drivers/memory/tegra/tegra124.c @@ -1032,6 +1032,7 @@ const struct tegra_mc_soc tegra124_mc_soc = { .num_clients = ARRAY_SIZE(tegra124_mc_clients), .num_address_bits = 34, .atom_size = 32, + .client_id_mask = 0x7f, .smmu = &tegra124_smmu_soc, .emem_regs = tegra124_mc_emem_regs, .num_emem_regs = ARRAY_SIZE(tegra124_mc_emem_regs), @@ -1067,6 +1068,7 @@ const struct tegra_mc_soc tegra132_mc_soc = { .num_clients = ARRAY_SIZE(tegra124_mc_clients), .num_address_bits = 34, .atom_size = 32, + .client_id_mask = 0x7f, .smmu = &tegra132_smmu_soc, }; #endif /* CONFIG_ARCH_TEGRA_132_SOC */ diff --git a/drivers/memory/tegra/tegra210.c b/drivers/memory/tegra/tegra210.c new file mode 100644 index 0000000..5e144ab --- /dev/null +++ b/drivers/memory/tegra/tegra210.c @@ -0,0 +1,1080 @@ +/* + * Copyright (C) 2015 NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/of.h> +#include <linux/mm.h> + +#include <asm/cacheflush.h> + +#include <dt-bindings/memory/tegra210-mc.h> + +#include "mc.h" + +static const struct tegra_mc_client tegra210_mc_clients[] = { + { + .id = 0x00, + .name = "ptcr", + .swgroup = TEGRA_SWGROUP_PTC, + }, { + .id = 0x01, + .name = "display0a", + .swgroup = TEGRA_SWGROUP_DC, + .smmu = { + .reg = 0x228, + .bit = 1, + }, + .la = { + .reg = 0x2e8, + .shift = 0, + .mask = 0xff, + .def = 0xc2, + }, + }, { + .id = 0x02, + .name = "display0ab", + .swgroup = TEGRA_SWGROUP_DCB, + .smmu = { + .reg = 0x228, + .bit = 2, + }, + .la = { + .reg = 0x2f4, + .shift = 0, + .mask = 0xff, + .def = 0xc6, + }, + }, { + .id = 0x03, + .name = "display0b", + .swgroup = TEGRA_SWGROUP_DC, + .smmu = { + .reg = 0x228, + .bit = 3, + }, + .la = { + .reg = 0x2e8, + .shift = 16, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x04, + .name = "display0bb", + .swgroup = TEGRA_SWGROUP_DCB, + .smmu = { + .reg = 0x228, + .bit = 4, + }, + .la = { + .reg = 0x2f4, + .shift = 16, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x05, + .name = "display0c", + .swgroup = TEGRA_SWGROUP_DC, + .smmu = { + .reg = 0x228, + .bit = 5, + }, + .la = { + .reg = 0x2ec, + .shift = 0, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x06, + .name = "display0cb", + .swgroup = TEGRA_SWGROUP_DCB, + .smmu = { + .reg = 0x228, + .bit = 6, + }, + .la = { + .reg = 0x2f8, + .shift = 0, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x0e, + .name = "afir", + .swgroup = TEGRA_SWGROUP_AFI, + .smmu = { + .reg = 0x228, + .bit = 14, + }, + .la = { + .reg = 0x2e0, + .shift = 0, + .mask = 0xff, + .def = 0x13, + }, + }, { + .id = 0x0f, + .name = "avpcarm7r", + .swgroup = TEGRA_SWGROUP_AVPC, + .smmu = { + .reg = 0x228, + .bit = 15, + }, + .la = { + .reg = 0x2e4, + .shift = 0, + .mask = 0xff, + .def = 0x04, + }, + }, { + .id = 0x10, + .name = "displayhc", + .swgroup = TEGRA_SWGROUP_DC, + .smmu = { + .reg = 0x228, + .bit = 16, + }, + .la = { + .reg = 0x2f0, + .shift = 0, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x11, + .name = "displayhcb", + .swgroup = TEGRA_SWGROUP_DCB, + .smmu = { + .reg = 0x228, + .bit = 17, + }, + .la = { + .reg = 0x2fc, + .shift = 0, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x15, + .name = "hdar", + .swgroup = TEGRA_SWGROUP_HDA, + .smmu = { + .reg = 0x228, + .bit = 21, + }, + .la = { + .reg = 0x318, + .shift = 0, + .mask = 0xff, + .def = 0x24, + }, + }, { + .id = 0x16, + .name = "host1xdmar", + .swgroup = TEGRA_SWGROUP_HC, + .smmu = { + .reg = 0x228, + .bit = 22, + }, + .la = { + .reg = 0x310, + .shift = 0, + .mask = 0xff, + .def = 0x1e, + }, + }, { + .id = 0x17, + .name = "host1xr", + .swgroup = TEGRA_SWGROUP_HC, + .smmu = { + .reg = 0x228, + .bit = 23, + }, + .la = { + .reg = 0x310, + .shift = 16, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x1c, + .name = "nvencsrd", + .swgroup = TEGRA_SWGROUP_NVENC, + .smmu = { + .reg = 0x228, + .bit = 28, + }, + .la = { + .reg = 0x328, + .shift = 0, + .mask = 0xff, + .def = 0x23, + }, + }, { + .id = 0x1d, + .name = "ppcsahbdmar", + .swgroup = TEGRA_SWGROUP_PPCS, + .smmu = { + .reg = 0x228, + .bit = 29, + }, + .la = { + .reg = 0x344, + .shift = 0, + .mask = 0xff, + .def = 0x49, + }, + }, { + .id = 0x1e, + .name = "ppcsahbslvr", + .swgroup = TEGRA_SWGROUP_PPCS, + .smmu = { + .reg = 0x228, + .bit = 30, + }, + .la = { + .reg = 0x344, + .shift = 16, + .mask = 0xff, + .def = 0x1a, + }, + }, { + .id = 0x1f, + .name = "satar", + .swgroup = TEGRA_SWGROUP_SATA, + .smmu = { + .reg = 0x228, + .bit = 31, + }, + .la = { + .reg = 0x350, + .shift = 0, + .mask = 0xff, + .def = 0x65, + }, + }, { + .id = 0x27, + .name = "mpcorer", + .swgroup = TEGRA_SWGROUP_MPCORE, + .la = { + .reg = 0x320, + .shift = 0, + .mask = 0xff, + .def = 0x04, + }, + }, { + .id = 0x2b, + .name = "nvencswr", + .swgroup = TEGRA_SWGROUP_NVENC, + .smmu = { + .reg = 0x22c, + .bit = 11, + }, + .la = { + .reg = 0x328, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x31, + .name = "afiw", + .swgroup = TEGRA_SWGROUP_AFI, + .smmu = { + .reg = 0x22c, + .bit = 17, + }, + .la = { + .reg = 0x2e0, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x32, + .name = "avpcarm7w", + .swgroup = TEGRA_SWGROUP_AVPC, + .smmu = { + .reg = 0x22c, + .bit = 18, + }, + .la = { + .reg = 0x2e4, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x35, + .name = "hdaw", + .swgroup = TEGRA_SWGROUP_HDA, + .smmu = { + .reg = 0x22c, + .bit = 21, + }, + .la = { + .reg = 0x318, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x36, + .name = "host1xw", + .swgroup = TEGRA_SWGROUP_HC, + .smmu = { + .reg = 0x22c, + .bit = 22, + }, + .la = { + .reg = 0x314, + .shift = 0, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x39, + .name = "mpcorew", + .swgroup = TEGRA_SWGROUP_MPCORE, + .la = { + .reg = 0x320, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x3b, + .name = "ppcsahbdmaw", + .swgroup = TEGRA_SWGROUP_PPCS, + .smmu = { + .reg = 0x22c, + .bit = 27, + }, + .la = { + .reg = 0x348, + .shift = 0, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x3c, + .name = "ppcsahbslvw", + .swgroup = TEGRA_SWGROUP_PPCS, + .smmu = { + .reg = 0x22c, + .bit = 28, + }, + .la = { + .reg = 0x348, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x3d, + .name = "sataw", + .swgroup = TEGRA_SWGROUP_SATA, + .smmu = { + .reg = 0x22c, + .bit = 29, + }, + .la = { + .reg = 0x350, + .shift = 16, + .mask = 0xff, + .def = 0x65, + }, + }, { + .id = 0x44, + .name = "ispra", + .swgroup = TEGRA_SWGROUP_ISP2, + .smmu = { + .reg = 0x230, + .bit = 4, + }, + .la = { + .reg = 0x370, + .shift = 0, + .mask = 0xff, + .def = 0x18, + }, + }, { + .id = 0x46, + .name = "ispwa", + .swgroup = TEGRA_SWGROUP_ISP2, + .smmu = { + .reg = 0x230, + .bit = 6, + }, + .la = { + .reg = 0x374, + .shift = 0, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x47, + .name = "ispwb", + .swgroup = TEGRA_SWGROUP_ISP2, + .smmu = { + .reg = 0x230, + .bit = 7, + }, + .la = { + .reg = 0x374, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x4a, + .name = "xusb_hostr", + .swgroup = TEGRA_SWGROUP_XUSB_HOST, + .smmu = { + .reg = 0x230, + .bit = 10, + }, + .la = { + .reg = 0x37c, + .shift = 0, + .mask = 0xff, + .def = 0x39, + }, + }, { + .id = 0x4b, + .name = "xusb_hostw", + .swgroup = TEGRA_SWGROUP_XUSB_HOST, + .smmu = { + .reg = 0x230, + .bit = 11, + }, + .la = { + .reg = 0x37c, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x4c, + .name = "xusb_devr", + .swgroup = TEGRA_SWGROUP_XUSB_DEV, + .smmu = { + .reg = 0x230, + .bit = 12, + }, + .la = { + .reg = 0x380, + .shift = 0, + .mask = 0xff, + .def = 0x39, + }, + }, { + .id = 0x4d, + .name = "xusb_devw", + .swgroup = TEGRA_SWGROUP_XUSB_DEV, + .smmu = { + .reg = 0x230, + .bit = 13, + }, + .la = { + .reg = 0x380, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x4e, + .name = "isprab", + .swgroup = TEGRA_SWGROUP_ISP2B, + .smmu = { + .reg = 0x230, + .bit = 14, + }, + .la = { + .reg = 0x384, + .shift = 0, + .mask = 0xff, + .def = 0x18, + }, + }, { + .id = 0x50, + .name = "ispwab", + .swgroup = TEGRA_SWGROUP_ISP2B, + .smmu = { + .reg = 0x230, + .bit = 16, + }, + .la = { + .reg = 0x388, + .shift = 0, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x51, + .name = "ispwbb", + .swgroup = TEGRA_SWGROUP_ISP2B, + .smmu = { + .reg = 0x230, + .bit = 17, + }, + .la = { + .reg = 0x388, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x54, + .name = "tsecsrd", + .swgroup = TEGRA_SWGROUP_TSEC, + .smmu = { + .reg = 0x230, + .bit = 20, + }, + .la = { + .reg = 0x390, + .shift = 0, + .mask = 0xff, + .def = 0x9b, + }, + }, { + .id = 0x55, + .name = "tsecswr", + .swgroup = TEGRA_SWGROUP_TSEC, + .smmu = { + .reg = 0x230, + .bit = 21, + }, + .la = { + .reg = 0x390, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x56, + .name = "a9avpscr", + .swgroup = TEGRA_SWGROUP_A9AVP, + .smmu = { + .reg = 0x230, + .bit = 22, + }, + .la = { + .reg = 0x3a4, + .shift = 0, + .mask = 0xff, + .def = 0x04, + }, + }, { + .id = 0x57, + .name = "a9avpscw", + .swgroup = TEGRA_SWGROUP_A9AVP, + .smmu = { + .reg = 0x230, + .bit = 23, + }, + .la = { + .reg = 0x3a4, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x58, + .name = "gpusrd", + .swgroup = TEGRA_SWGROUP_GPU, + .smmu = { + /* read-only */ + .reg = 0x230, + .bit = 24, + }, + .la = { + .reg = 0x3c8, + .shift = 0, + .mask = 0xff, + .def = 0x1a, + }, + }, { + .id = 0x59, + .name = "gpuswr", + .swgroup = TEGRA_SWGROUP_GPU, + .smmu = { + /* read-only */ + .reg = 0x230, + .bit = 25, + }, + .la = { + .reg = 0x3c8, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x5a, + .name = "displayt", + .swgroup = TEGRA_SWGROUP_DC, + .smmu = { + .reg = 0x230, + .bit = 26, + }, + .la = { + .reg = 0x2f0, + .shift = 16, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x60, + .name = "sdmmcra", + .swgroup = TEGRA_SWGROUP_SDMMC1A, + .smmu = { + .reg = 0x234, + .bit = 0, + }, + .la = { + .reg = 0x3b8, + .shift = 0, + .mask = 0xff, + .def = 0x49, + }, + }, { + .id = 0x61, + .name = "sdmmcraa", + .swgroup = TEGRA_SWGROUP_SDMMC2A, + .smmu = { + .reg = 0x234, + .bit = 1, + }, + .la = { + .reg = 0x3bc, + .shift = 0, + .mask = 0xff, + .def = 0x49, + }, + }, { + .id = 0x62, + .name = "sdmmcr", + .swgroup = TEGRA_SWGROUP_SDMMC3A, + .smmu = { + .reg = 0x234, + .bit = 2, + }, + .la = { + .reg = 0x3c0, + .shift = 0, + .mask = 0xff, + .def = 0x49, + }, + }, { + .id = 0x63, + .swgroup = TEGRA_SWGROUP_SDMMC4A, + .name = "sdmmcrab", + .smmu = { + .reg = 0x234, + .bit = 3, + }, + .la = { + .reg = 0x3c4, + .shift = 0, + .mask = 0xff, + .def = 0x49, + }, + }, { + .id = 0x64, + .name = "sdmmcwa", + .swgroup = TEGRA_SWGROUP_SDMMC1A, + .smmu = { + .reg = 0x234, + .bit = 4, + }, + .la = { + .reg = 0x3b8, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x65, + .name = "sdmmcwaa", + .swgroup = TEGRA_SWGROUP_SDMMC2A, + .smmu = { + .reg = 0x234, + .bit = 5, + }, + .la = { + .reg = 0x3bc, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x66, + .name = "sdmmcw", + .swgroup = TEGRA_SWGROUP_SDMMC3A, + .smmu = { + .reg = 0x234, + .bit = 6, + }, + .la = { + .reg = 0x3c0, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x67, + .name = "sdmmcwab", + .swgroup = TEGRA_SWGROUP_SDMMC4A, + .smmu = { + .reg = 0x234, + .bit = 7, + }, + .la = { + .reg = 0x3c4, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x6c, + .name = "vicsrd", + .swgroup = TEGRA_SWGROUP_VIC, + .smmu = { + .reg = 0x234, + .bit = 12, + }, + .la = { + .reg = 0x394, + .shift = 0, + .mask = 0xff, + .def = 0x1a, + }, + }, { + .id = 0x6d, + .name = "vicswr", + .swgroup = TEGRA_SWGROUP_VIC, + .smmu = { + .reg = 0x234, + .bit = 13, + }, + .la = { + .reg = 0x394, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x72, + .name = "viw", + .swgroup = TEGRA_SWGROUP_VI, + .smmu = { + .reg = 0x234, + .bit = 18, + }, + .la = { + .reg = 0x398, + .shift = 0, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x73, + .name = "displayd", + .swgroup = TEGRA_SWGROUP_DC, + .smmu = { + .reg = 0x234, + .bit = 19, + }, + .la = { + .reg = 0x3c8, + .shift = 0, + .mask = 0xff, + .def = 0x50, + }, + }, { + .id = 0x78, + .name = "nvdecsrd", + .swgroup = TEGRA_SWGROUP_NVDEC, + .smmu = { + .reg = 0x234, + .bit = 24, + }, + .la = { + .reg = 0x3d8, + .shift = 0, + .mask = 0xff, + .def = 0x23, + }, + }, { + .id = 0x79, + .name = "nvdecswr", + .swgroup = TEGRA_SWGROUP_NVDEC, + .smmu = { + .reg = 0x234, + .bit = 25, + }, + .la = { + .reg = 0x3d8, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x7a, + .name = "aper", + .swgroup = TEGRA_SWGROUP_APE, + .smmu = { + .reg = 0x234, + .bit = 26, + }, + .la = { + .reg = 0x3dc, + .shift = 0, + .mask = 0xff, + .def = 0xff, + }, + }, { + .id = 0x7b, + .name = "apew", + .swgroup = TEGRA_SWGROUP_APE, + .smmu = { + .reg = 0x234, + .bit = 27, + }, + .la = { + .reg = 0x3dc, + .shift = 0, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x7e, + .name = "nvjpgsrd", + .swgroup = TEGRA_SWGROUP_NVJPG, + .smmu = { + .reg = 0x234, + .bit = 30, + }, + .la = { + .reg = 0x3e4, + .shift = 0, + .mask = 0xff, + .def = 0x23, + }, + }, { + .id = 0x7f, + .name = "nvjpgswr", + .swgroup = TEGRA_SWGROUP_NVJPG, + .smmu = { + .reg = 0x234, + .bit = 31, + }, + .la = { + .reg = 0x3e4, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x80, + .name = "sesrd", + .swgroup = TEGRA_SWGROUP_SE, + .smmu = { + .reg = 0xb98, + .bit = 0, + }, + .la = { + .reg = 0x3e0, + .shift = 0, + .mask = 0xff, + .def = 0x2e, + }, + }, { + .id = 0x81, + .name = "seswr", + .swgroup = TEGRA_SWGROUP_SE, + .smmu = { + .reg = 0xb98, + .bit = 1, + }, + .la = { + .reg = 0xb98, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x82, + .name = "axiapr", + .swgroup = TEGRA_SWGROUP_AXIAP, + .smmu = { + .reg = 0xb98, + .bit = 2, + }, + .la = { + .reg = 0x3a0, + .shift = 0, + .mask = 0xff, + .def = 0xff, + }, + }, { + .id = 0x83, + .name = "axiapw", + .swgroup = TEGRA_SWGROUP_AXIAP, + .smmu = { + .reg = 0xb98, + .bit = 3, + }, + .la = { + .reg = 0x3a0, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x84, + .name = "etrr", + .swgroup = TEGRA_SWGROUP_ETR, + .smmu = { + .reg = 0xb98, + .bit = 4, + }, + .la = { + .reg = 0x3ec, + .shift = 0, + .mask = 0xff, + .def = 0xff, + }, + }, { + .id = 0x85, + .name = "etrw", + .swgroup = TEGRA_SWGROUP_ETR, + .smmu = { + .reg = 0xb98, + .bit = 5, + }, + .la = { + .reg = 0x3ec, + .shift = 16, + .mask = 0xff, + .def = 0xff, + }, + }, { + .id = 0x86, + .name = "tsecsrdb", + .swgroup = TEGRA_SWGROUP_TSECB, + .smmu = { + .reg = 0xb98, + .bit = 6, + }, + .la = { + .reg = 0x3f0, + .shift = 0, + .mask = 0xff, + .def = 0x9b, + }, + }, { + .id = 0x87, + .name = "tsecswrb", + .swgroup = TEGRA_SWGROUP_TSECB, + .smmu = { + .reg = 0xb98, + .bit = 7, + }, + .la = { + .reg = 0x3f0, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, { + .id = 0x88, + .name = "gpusrd2", + .swgroup = TEGRA_SWGROUP_GPU, + .smmu = { + /* read-only */ + .reg = 0xb98, + .bit = 8, + }, + .la = { + .reg = 0x3e8, + .shift = 0, + .mask = 0xff, + .def = 0x1a, + }, + }, { + .id = 0x89, + .name = "gpuswr2", + .swgroup = TEGRA_SWGROUP_GPU, + .smmu = { + /* read-only */ + .reg = 0xb98, + .bit = 9, + }, + .la = { + .reg = 0x3e8, + .shift = 16, + .mask = 0xff, + .def = 0x80, + }, + }, +}; + +static const struct tegra_smmu_swgroup tegra210_swgroups[] = { + { .name = "dc", .swgroup = TEGRA_SWGROUP_DC, .reg = 0x240 }, + { .name = "dcb", .swgroup = TEGRA_SWGROUP_DCB, .reg = 0x244 }, + { .name = "afi", .swgroup = TEGRA_SWGROUP_AFI, .reg = 0x238 }, + { .name = "avpc", .swgroup = TEGRA_SWGROUP_AVPC, .reg = 0x23c }, + { .name = "hda", .swgroup = TEGRA_SWGROUP_HDA, .reg = 0x254 }, + { .name = "hc", .swgroup = TEGRA_SWGROUP_HC, .reg = 0x250 }, + { .name = "nvenc", .swgroup = TEGRA_SWGROUP_NVENC, .reg = 0x264 }, + { .name = "ppcs", .swgroup = TEGRA_SWGROUP_PPCS, .reg = 0x270 }, + { .name = "sata", .swgroup = TEGRA_SWGROUP_SATA, .reg = 0x274 }, + { .name = "isp2", .swgroup = TEGRA_SWGROUP_ISP2, .reg = 0x258 }, + { .name = "xusb_host", .swgroup = TEGRA_SWGROUP_XUSB_HOST, .reg = 0x288 }, + { .name = "xusb_dev", .swgroup = TEGRA_SWGROUP_XUSB_DEV, .reg = 0x28c }, + { .name = "isp2b", .swgroup = TEGRA_SWGROUP_ISP2B, .reg = 0xaa4 }, + { .name = "tsec", .swgroup = TEGRA_SWGROUP_TSEC, .reg = 0x294 }, + { .name = "a9avp", .swgroup = TEGRA_SWGROUP_A9AVP, .reg = 0x290 }, + { .name = "gpu", .swgroup = TEGRA_SWGROUP_GPU, .reg = 0xaac }, + { .name = "sdmmc1a", .swgroup = TEGRA_SWGROUP_SDMMC1A, .reg = 0xa94 }, + { .name = "sdmmc2a", .swgroup = TEGRA_SWGROUP_SDMMC2A, .reg = 0xa98 }, + { .name = "sdmmc3a", .swgroup = TEGRA_SWGROUP_SDMMC3A, .reg = 0xa9c }, + { .name = "sdmmc4a", .swgroup = TEGRA_SWGROUP_SDMMC4A, .reg = 0xaa0 }, + { .name = "vic", .swgroup = TEGRA_SWGROUP_VIC, .reg = 0x284 }, + { .name = "vi", .swgroup = TEGRA_SWGROUP_VI, .reg = 0x280 }, + { .name = "nvdec", .swgroup = TEGRA_SWGROUP_NVDEC, .reg = 0xab4 }, + { .name = "ape", .swgroup = TEGRA_SWGROUP_APE, .reg = 0xab8 }, + { .name = "nvjpg", .swgroup = TEGRA_SWGROUP_NVJPG, .reg = 0xac0 }, + { .name = "se", .swgroup = TEGRA_SWGROUP_SE, .reg = 0xabc }, + { .name = "axiap", .swgroup = TEGRA_SWGROUP_AXIAP, .reg = 0xacc }, + { .name = "etr", .swgroup = TEGRA_SWGROUP_ETR, .reg = 0xad0 }, + { .name = "tsecb", .swgroup = TEGRA_SWGROUP_TSECB, .reg = 0xad4 }, +}; + +static const struct tegra_smmu_soc tegra210_smmu_soc = { + .clients = tegra210_mc_clients, + .num_clients = ARRAY_SIZE(tegra210_mc_clients), + .swgroups = tegra210_swgroups, + .num_swgroups = ARRAY_SIZE(tegra210_swgroups), + .supports_round_robin_arbitration = true, + .supports_request_limit = true, + .num_tlb_lines = 32, + .num_asids = 128, +}; + +const struct tegra_mc_soc tegra210_mc_soc = { + .clients = tegra210_mc_clients, + .num_clients = ARRAY_SIZE(tegra210_mc_clients), + .num_address_bits = 34, + .atom_size = 64, + .client_id_mask = 0xff, + .smmu = &tegra210_smmu_soc, +}; diff --git a/drivers/memory/tegra/tegra30.c b/drivers/memory/tegra/tegra30.c index 1abcd8f..52e16c7 100644 --- a/drivers/memory/tegra/tegra30.c +++ b/drivers/memory/tegra/tegra30.c @@ -966,5 +966,6 @@ const struct tegra_mc_soc tegra30_mc_soc = { .num_clients = ARRAY_SIZE(tegra30_mc_clients), .num_address_bits = 32, .atom_size = 16, + .client_id_mask = 0x7f, .smmu = &tegra30_smmu_soc, }; diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 157d421..85d5904 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -1,5 +1,8 @@ obj-$(CONFIG_RESET_CONTROLLER) += core.o +obj-$(CONFIG_ARCH_LPC18XX) += reset-lpc18xx.o obj-$(CONFIG_ARCH_SOCFPGA) += reset-socfpga.o obj-$(CONFIG_ARCH_BERLIN) += reset-berlin.o obj-$(CONFIG_ARCH_SUNXI) += reset-sunxi.o obj-$(CONFIG_ARCH_STI) += sti/ +obj-$(CONFIG_ARCH_ZYNQ) += reset-zynq.o +obj-$(CONFIG_ATH79) += reset-ath79.o diff --git a/drivers/reset/reset-ath79.c b/drivers/reset/reset-ath79.c new file mode 100644 index 0000000..d2d2904 --- /dev/null +++ b/drivers/reset/reset-ath79.c @@ -0,0 +1,128 @@ +/* + * Copyright (C) 2015 Alban Bedel <albeu@free.fr> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/reset-controller.h> + +struct ath79_reset { + struct reset_controller_dev rcdev; + void __iomem *base; + spinlock_t lock; +}; + +static int ath79_reset_update(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct ath79_reset *ath79_reset = + container_of(rcdev, struct ath79_reset, rcdev); + unsigned long flags; + u32 val; + + spin_lock_irqsave(&ath79_reset->lock, flags); + val = readl(ath79_reset->base); + if (assert) + val |= BIT(id); + else + val &= ~BIT(id); + writel(val, ath79_reset->base); + spin_unlock_irqrestore(&ath79_reset->lock, flags); + + return 0; +} + +static int ath79_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return ath79_reset_update(rcdev, id, true); +} + +static int ath79_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return ath79_reset_update(rcdev, id, false); +} + +static int ath79_reset_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct ath79_reset *ath79_reset = + container_of(rcdev, struct ath79_reset, rcdev); + u32 val; + + val = readl(ath79_reset->base); + + return !!(val & BIT(id)); +} + +static struct reset_control_ops ath79_reset_ops = { + .assert = ath79_reset_assert, + .deassert = ath79_reset_deassert, + .status = ath79_reset_status, +}; + +static int ath79_reset_probe(struct platform_device *pdev) +{ + struct ath79_reset *ath79_reset; + struct resource *res; + + ath79_reset = devm_kzalloc(&pdev->dev, + sizeof(*ath79_reset), GFP_KERNEL); + if (!ath79_reset) + return -ENOMEM; + + platform_set_drvdata(pdev, ath79_reset); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ath79_reset->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ath79_reset->base)) + return PTR_ERR(ath79_reset->base); + + ath79_reset->rcdev.ops = &ath79_reset_ops; + ath79_reset->rcdev.owner = THIS_MODULE; + ath79_reset->rcdev.of_node = pdev->dev.of_node; + ath79_reset->rcdev.of_reset_n_cells = 1; + ath79_reset->rcdev.nr_resets = 32; + + return reset_controller_register(&ath79_reset->rcdev); +} + +static int ath79_reset_remove(struct platform_device *pdev) +{ + struct ath79_reset *ath79_reset = platform_get_drvdata(pdev); + + reset_controller_unregister(&ath79_reset->rcdev); + + return 0; +} + +static const struct of_device_id ath79_reset_dt_ids[] = { + { .compatible = "qca,ar7100-reset", }, + { }, +}; +MODULE_DEVICE_TABLE(of, ath79_reset_dt_ids); + +static struct platform_driver ath79_reset_driver = { + .probe = ath79_reset_probe, + .remove = ath79_reset_remove, + .driver = { + .name = "ath79-reset", + .of_match_table = ath79_reset_dt_ids, + }, +}; +module_platform_driver(ath79_reset_driver); + +MODULE_AUTHOR("Alban Bedel <albeu@free.fr>"); +MODULE_DESCRIPTION("AR71xx Reset Controller Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/reset/reset-lpc18xx.c b/drivers/reset/reset-lpc18xx.c new file mode 100644 index 0000000..70922e9 --- /dev/null +++ b/drivers/reset/reset-lpc18xx.c @@ -0,0 +1,258 @@ +/* + * Reset driver for NXP LPC18xx/43xx Reset Generation Unit (RGU). + * + * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/reboot.h> +#include <linux/reset-controller.h> +#include <linux/spinlock.h> + +/* LPC18xx RGU registers */ +#define LPC18XX_RGU_CTRL0 0x100 +#define LPC18XX_RGU_CTRL1 0x104 +#define LPC18XX_RGU_ACTIVE_STATUS0 0x150 +#define LPC18XX_RGU_ACTIVE_STATUS1 0x154 + +#define LPC18XX_RGU_RESETS_PER_REG 32 + +/* Internal reset outputs */ +#define LPC18XX_RGU_CORE_RST 0 +#define LPC43XX_RGU_M0SUB_RST 12 +#define LPC43XX_RGU_M0APP_RST 56 + +struct lpc18xx_rgu_data { + struct reset_controller_dev rcdev; + struct clk *clk_delay; + struct clk *clk_reg; + void __iomem *base; + spinlock_t lock; + u32 delay_us; +}; + +#define to_rgu_data(p) container_of(p, struct lpc18xx_rgu_data, rcdev) + +static void __iomem *rgu_base; + +static int lpc18xx_rgu_restart(struct notifier_block *this, unsigned long mode, + void *cmd) +{ + writel(BIT(LPC18XX_RGU_CORE_RST), rgu_base + LPC18XX_RGU_CTRL0); + mdelay(2000); + + pr_emerg("%s: unable to restart system\n", __func__); + + return NOTIFY_DONE; +} + +static struct notifier_block lpc18xx_rgu_restart_nb = { + .notifier_call = lpc18xx_rgu_restart, + .priority = 192, +}; + +/* + * The LPC18xx RGU has mostly self-deasserting resets except for the + * two reset lines going to the internal Cortex-M0 cores. + * + * To prevent the M0 core resets from accidentally getting deasserted + * status register must be check and bits in control register set to + * preserve the state. + */ +static int lpc18xx_rgu_setclear_reset(struct reset_controller_dev *rcdev, + unsigned long id, bool set) +{ + struct lpc18xx_rgu_data *rc = to_rgu_data(rcdev); + u32 stat_offset = LPC18XX_RGU_ACTIVE_STATUS0; + u32 ctrl_offset = LPC18XX_RGU_CTRL0; + unsigned long flags; + u32 stat, rst_bit; + + stat_offset += (id / LPC18XX_RGU_RESETS_PER_REG) * sizeof(u32); + ctrl_offset += (id / LPC18XX_RGU_RESETS_PER_REG) * sizeof(u32); + rst_bit = 1 << (id % LPC18XX_RGU_RESETS_PER_REG); + + spin_lock_irqsave(&rc->lock, flags); + stat = ~readl(rc->base + stat_offset); + if (set) + writel(stat | rst_bit, rc->base + ctrl_offset); + else + writel(stat & ~rst_bit, rc->base + ctrl_offset); + spin_unlock_irqrestore(&rc->lock, flags); + + return 0; +} + +static int lpc18xx_rgu_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return lpc18xx_rgu_setclear_reset(rcdev, id, true); +} + +static int lpc18xx_rgu_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return lpc18xx_rgu_setclear_reset(rcdev, id, false); +} + +/* Only M0 cores require explicit reset deassert */ +static int lpc18xx_rgu_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct lpc18xx_rgu_data *rc = to_rgu_data(rcdev); + + lpc18xx_rgu_assert(rcdev, id); + udelay(rc->delay_us); + + switch (id) { + case LPC43XX_RGU_M0SUB_RST: + case LPC43XX_RGU_M0APP_RST: + lpc18xx_rgu_setclear_reset(rcdev, id, false); + } + + return 0; +} + +static int lpc18xx_rgu_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct lpc18xx_rgu_data *rc = to_rgu_data(rcdev); + u32 bit, offset = LPC18XX_RGU_ACTIVE_STATUS0; + + offset += (id / LPC18XX_RGU_RESETS_PER_REG) * sizeof(u32); + bit = 1 << (id % LPC18XX_RGU_RESETS_PER_REG); + + return !(readl(rc->base + offset) & bit); +} + +static struct reset_control_ops lpc18xx_rgu_ops = { + .reset = lpc18xx_rgu_reset, + .assert = lpc18xx_rgu_assert, + .deassert = lpc18xx_rgu_deassert, + .status = lpc18xx_rgu_status, +}; + +static int lpc18xx_rgu_probe(struct platform_device *pdev) +{ + struct lpc18xx_rgu_data *rc; + struct resource *res; + u32 fcclk, firc; + int ret; + + rc = devm_kzalloc(&pdev->dev, sizeof(*rc), GFP_KERNEL); + if (!rc) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rc->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rc->base)) + return PTR_ERR(rc->base); + + rc->clk_reg = devm_clk_get(&pdev->dev, "reg"); + if (IS_ERR(rc->clk_reg)) { + dev_err(&pdev->dev, "reg clock not found\n"); + return PTR_ERR(rc->clk_reg); + } + + rc->clk_delay = devm_clk_get(&pdev->dev, "delay"); + if (IS_ERR(rc->clk_delay)) { + dev_err(&pdev->dev, "delay clock not found\n"); + return PTR_ERR(rc->clk_delay); + } + + ret = clk_prepare_enable(rc->clk_reg); + if (ret) { + dev_err(&pdev->dev, "unable to enable reg clock\n"); + return ret; + } + + ret = clk_prepare_enable(rc->clk_delay); + if (ret) { + dev_err(&pdev->dev, "unable to enable delay clock\n"); + goto dis_clk_reg; + } + + fcclk = clk_get_rate(rc->clk_reg) / USEC_PER_SEC; + firc = clk_get_rate(rc->clk_delay) / USEC_PER_SEC; + if (fcclk == 0 || firc == 0) + rc->delay_us = 2; + else + rc->delay_us = DIV_ROUND_UP(fcclk, firc * firc); + + spin_lock_init(&rc->lock); + + rc->rcdev.owner = THIS_MODULE; + rc->rcdev.nr_resets = 64; + rc->rcdev.ops = &lpc18xx_rgu_ops; + rc->rcdev.of_node = pdev->dev.of_node; + + platform_set_drvdata(pdev, rc); + + ret = reset_controller_register(&rc->rcdev); + if (ret) { + dev_err(&pdev->dev, "unable to register device\n"); + goto dis_clks; + } + + rgu_base = rc->base; + ret = register_restart_handler(&lpc18xx_rgu_restart_nb); + if (ret) + dev_warn(&pdev->dev, "failed to register restart handler\n"); + + return 0; + +dis_clks: + clk_disable_unprepare(rc->clk_delay); +dis_clk_reg: + clk_disable_unprepare(rc->clk_reg); + + return ret; +} + +static int lpc18xx_rgu_remove(struct platform_device *pdev) +{ + struct lpc18xx_rgu_data *rc = platform_get_drvdata(pdev); + int ret; + + ret = unregister_restart_handler(&lpc18xx_rgu_restart_nb); + if (ret) + dev_warn(&pdev->dev, "failed to unregister restart handler\n"); + + reset_controller_unregister(&rc->rcdev); + + clk_disable_unprepare(rc->clk_delay); + clk_disable_unprepare(rc->clk_reg); + + return 0; +} + +static const struct of_device_id lpc18xx_rgu_match[] = { + { .compatible = "nxp,lpc1850-rgu" }, + { } +}; +MODULE_DEVICE_TABLE(of, lpc18xx_rgu_match); + +static struct platform_driver lpc18xx_rgu_driver = { + .probe = lpc18xx_rgu_probe, + .remove = lpc18xx_rgu_remove, + .driver = { + .name = "lpc18xx-reset", + .of_match_table = lpc18xx_rgu_match, + }, +}; +module_platform_driver(lpc18xx_rgu_driver); + +MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>"); +MODULE_DESCRIPTION("Reset driver for LPC18xx/43xx RGU"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c index 0a8def3..1a6c5d6 100644 --- a/drivers/reset/reset-socfpga.c +++ b/drivers/reset/reset-socfpga.c @@ -24,11 +24,11 @@ #include <linux/types.h> #define NR_BANKS 4 -#define OFFSET_MODRST 0x10 struct socfpga_reset_data { spinlock_t lock; void __iomem *membase; + u32 modrst_offset; struct reset_controller_dev rcdev; }; @@ -45,8 +45,8 @@ static int socfpga_reset_assert(struct reset_controller_dev *rcdev, spin_lock_irqsave(&data->lock, flags); - reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS)); - writel(reg | BIT(offset), data->membase + OFFSET_MODRST + + reg = readl(data->membase + data->modrst_offset + (bank * NR_BANKS)); + writel(reg | BIT(offset), data->membase + data->modrst_offset + (bank * NR_BANKS)); spin_unlock_irqrestore(&data->lock, flags); @@ -67,8 +67,8 @@ static int socfpga_reset_deassert(struct reset_controller_dev *rcdev, spin_lock_irqsave(&data->lock, flags); - reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS)); - writel(reg & ~BIT(offset), data->membase + OFFSET_MODRST + + reg = readl(data->membase + data->modrst_offset + (bank * NR_BANKS)); + writel(reg & ~BIT(offset), data->membase + data->modrst_offset + (bank * NR_BANKS)); spin_unlock_irqrestore(&data->lock, flags); @@ -85,7 +85,7 @@ static int socfpga_reset_status(struct reset_controller_dev *rcdev, int offset = id % BITS_PER_LONG; u32 reg; - reg = readl(data->membase + OFFSET_MODRST + (bank * NR_BANKS)); + reg = readl(data->membase + data->modrst_offset + (bank * NR_BANKS)); return !(reg & BIT(offset)); } @@ -100,6 +100,8 @@ static int socfpga_reset_probe(struct platform_device *pdev) { struct socfpga_reset_data *data; struct resource *res; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; /* * The binding was mainlined without the required property. @@ -120,6 +122,11 @@ static int socfpga_reset_probe(struct platform_device *pdev) if (IS_ERR(data->membase)) return PTR_ERR(data->membase); + if (of_property_read_u32(np, "altr,modrst-offset", &data->modrst_offset)) { + dev_warn(dev, "missing altr,modrst-offset property, assuming 0x10!\n"); + data->modrst_offset = 0x10; + } + spin_lock_init(&data->lock); data->rcdev.owner = THIS_MODULE; diff --git a/drivers/reset/reset-zynq.c b/drivers/reset/reset-zynq.c new file mode 100644 index 0000000..89318a5 --- /dev/null +++ b/drivers/reset/reset-zynq.c @@ -0,0 +1,155 @@ +/* + * Copyright (c) 2015, National Instruments Corp. + * + * Xilinx Zynq Reset controller driver + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/mfd/syscon.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/reset-controller.h> +#include <linux/regmap.h> +#include <linux/types.h> + +struct zynq_reset_data { + struct regmap *slcr; + struct reset_controller_dev rcdev; + u32 offset; +}; + +#define to_zynq_reset_data(p) \ + container_of((p), struct zynq_reset_data, rcdev) + +static int zynq_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct zynq_reset_data *priv = to_zynq_reset_data(rcdev); + + int bank = id / BITS_PER_LONG; + int offset = id % BITS_PER_LONG; + + pr_debug("%s: %s reset bank %u offset %u\n", KBUILD_MODNAME, __func__, + bank, offset); + + return regmap_update_bits(priv->slcr, + priv->offset + (bank * 4), + BIT(offset), + BIT(offset)); +} + +static int zynq_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct zynq_reset_data *priv = to_zynq_reset_data(rcdev); + + int bank = id / BITS_PER_LONG; + int offset = id % BITS_PER_LONG; + + pr_debug("%s: %s reset bank %u offset %u\n", KBUILD_MODNAME, __func__, + bank, offset); + + return regmap_update_bits(priv->slcr, + priv->offset + (bank * 4), + BIT(offset), + ~BIT(offset)); +} + +static int zynq_reset_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct zynq_reset_data *priv = to_zynq_reset_data(rcdev); + + int bank = id / BITS_PER_LONG; + int offset = id % BITS_PER_LONG; + int ret; + u32 reg; + + pr_debug("%s: %s reset bank %u offset %u\n", KBUILD_MODNAME, __func__, + bank, offset); + + ret = regmap_read(priv->slcr, priv->offset + (bank * 4), ®); + if (ret) + return ret; + + return !!(reg & BIT(offset)); +} + +static struct reset_control_ops zynq_reset_ops = { + .assert = zynq_reset_assert, + .deassert = zynq_reset_deassert, + .status = zynq_reset_status, +}; + +static int zynq_reset_probe(struct platform_device *pdev) +{ + struct resource *res; + struct zynq_reset_data *priv; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + platform_set_drvdata(pdev, priv); + + priv->slcr = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "syscon"); + if (IS_ERR(priv->slcr)) { + dev_err(&pdev->dev, "unable to get zynq-slcr regmap"); + return PTR_ERR(priv->slcr); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "missing IO resource\n"); + return -ENODEV; + } + + priv->offset = res->start; + + priv->rcdev.owner = THIS_MODULE; + priv->rcdev.nr_resets = resource_size(res) / 4 * BITS_PER_LONG; + priv->rcdev.ops = &zynq_reset_ops; + priv->rcdev.of_node = pdev->dev.of_node; + reset_controller_register(&priv->rcdev); + + return 0; +} + +static int zynq_reset_remove(struct platform_device *pdev) +{ + struct zynq_reset_data *priv = platform_get_drvdata(pdev); + + reset_controller_unregister(&priv->rcdev); + + return 0; +} + +static const struct of_device_id zynq_reset_dt_ids[] = { + { .compatible = "xlnx,zynq-reset", }, + { /* sentinel */ }, +}; + +static struct platform_driver zynq_reset_driver = { + .probe = zynq_reset_probe, + .remove = zynq_reset_remove, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = zynq_reset_dt_ids, + }, +}; +module_platform_driver(zynq_reset_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Moritz Fischer <moritz.fischer@ettus.com>"); +MODULE_DESCRIPTION("Zynq Reset Controller Driver"); diff --git a/drivers/reset/sti/reset-stih407.c b/drivers/reset/sti/reset-stih407.c index d83db5d7..827eb3d 100644 --- a/drivers/reset/sti/reset-stih407.c +++ b/drivers/reset/sti/reset-stih407.c @@ -11,7 +11,7 @@ #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> -#include <dt-bindings/reset-controller/stih407-resets.h> +#include <dt-bindings/reset/stih407-resets.h> #include "reset-syscfg.h" /* STiH407 Peripheral powerdown definitions. */ @@ -126,7 +126,7 @@ static const struct syscfg_reset_controller_data stih407_picophyreset_controller .channels = stih407_picophyresets, }; -static struct of_device_id stih407_reset_match[] = { +static const struct of_device_id stih407_reset_match[] = { { .compatible = "st,stih407-powerdown", .data = &stih407_powerdown_controller, diff --git a/drivers/reset/sti/reset-stih415.c b/drivers/reset/sti/reset-stih415.c index 8dad603..6f220cd 100644 --- a/drivers/reset/sti/reset-stih415.c +++ b/drivers/reset/sti/reset-stih415.c @@ -13,7 +13,7 @@ #include <linux/of_platform.h> #include <linux/platform_device.h> -#include <dt-bindings/reset-controller/stih415-resets.h> +#include <dt-bindings/reset/stih415-resets.h> #include "reset-syscfg.h" @@ -89,7 +89,7 @@ static struct syscfg_reset_controller_data stih415_softreset_controller = { .channels = stih415_softresets, }; -static struct of_device_id stih415_reset_match[] = { +static const struct of_device_id stih415_reset_match[] = { { .compatible = "st,stih415-powerdown", .data = &stih415_powerdown_controller, }, { .compatible = "st,stih415-softreset", diff --git a/drivers/reset/sti/reset-stih416.c b/drivers/reset/sti/reset-stih416.c index 79aed70..c581d60 100644 --- a/drivers/reset/sti/reset-stih416.c +++ b/drivers/reset/sti/reset-stih416.c @@ -13,7 +13,7 @@ #include <linux/of_platform.h> #include <linux/platform_device.h> -#include <dt-bindings/reset-controller/stih416-resets.h> +#include <dt-bindings/reset/stih416-resets.h> #include "reset-syscfg.h" @@ -120,7 +120,7 @@ static struct syscfg_reset_controller_data stih416_softreset_controller = { .channels = stih416_softresets, }; -static struct of_device_id stih416_reset_match[] = { +static const struct of_device_id stih416_reset_match[] = { { .compatible = "st,stih416-powerdown", .data = &stih416_powerdown_controller, }, { .compatible = "st,stih416-softreset", diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile index 7dc7c0d..0b12d77 100644 --- a/drivers/soc/Makefile +++ b/drivers/soc/Makefile @@ -2,6 +2,7 @@ # Makefile for the Linux Kernel SOC specific device drivers. # +obj-$(CONFIG_MACH_DOVE) += dove/ obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/ obj-$(CONFIG_ARCH_QCOM) += qcom/ obj-$(CONFIG_ARCH_SUNXI) += sunxi/ diff --git a/drivers/soc/dove/Makefile b/drivers/soc/dove/Makefile new file mode 100644 index 0000000..2db8e65 --- /dev/null +++ b/drivers/soc/dove/Makefile @@ -0,0 +1 @@ +obj-y += pmu.o diff --git a/drivers/soc/dove/pmu.c b/drivers/soc/dove/pmu.c new file mode 100644 index 0000000..6792aae --- /dev/null +++ b/drivers/soc/dove/pmu.c @@ -0,0 +1,412 @@ +/* + * Marvell Dove PMU support + */ +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/reset.h> +#include <linux/reset-controller.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/soc/dove/pmu.h> +#include <linux/spinlock.h> + +#define NR_PMU_IRQS 7 + +#define PMC_SW_RST 0x30 +#define PMC_IRQ_CAUSE 0x50 +#define PMC_IRQ_MASK 0x54 + +#define PMU_PWR 0x10 +#define PMU_ISO 0x58 + +struct pmu_data { + spinlock_t lock; + struct device_node *of_node; + void __iomem *pmc_base; + void __iomem *pmu_base; + struct irq_chip_generic *irq_gc; + struct irq_domain *irq_domain; +#ifdef CONFIG_RESET_CONTROLLER + struct reset_controller_dev reset; +#endif +}; + +/* + * The PMU contains a register to reset various subsystems within the + * SoC. Export this as a reset controller. + */ +#ifdef CONFIG_RESET_CONTROLLER +#define rcdev_to_pmu(rcdev) container_of(rcdev, struct pmu_data, reset) + +static int pmu_reset_reset(struct reset_controller_dev *rc, unsigned long id) +{ + struct pmu_data *pmu = rcdev_to_pmu(rc); + unsigned long flags; + u32 val; + + spin_lock_irqsave(&pmu->lock, flags); + val = readl_relaxed(pmu->pmc_base + PMC_SW_RST); + writel_relaxed(val & ~BIT(id), pmu->pmc_base + PMC_SW_RST); + writel_relaxed(val | BIT(id), pmu->pmc_base + PMC_SW_RST); + spin_unlock_irqrestore(&pmu->lock, flags); + + return 0; +} + +static int pmu_reset_assert(struct reset_controller_dev *rc, unsigned long id) +{ + struct pmu_data *pmu = rcdev_to_pmu(rc); + unsigned long flags; + u32 val = ~BIT(id); + + spin_lock_irqsave(&pmu->lock, flags); + val &= readl_relaxed(pmu->pmc_base + PMC_SW_RST); + writel_relaxed(val, pmu->pmc_base + PMC_SW_RST); + spin_unlock_irqrestore(&pmu->lock, flags); + + return 0; +} + +static int pmu_reset_deassert(struct reset_controller_dev *rc, unsigned long id) +{ + struct pmu_data *pmu = rcdev_to_pmu(rc); + unsigned long flags; + u32 val = BIT(id); + + spin_lock_irqsave(&pmu->lock, flags); + val |= readl_relaxed(pmu->pmc_base + PMC_SW_RST); + writel_relaxed(val, pmu->pmc_base + PMC_SW_RST); + spin_unlock_irqrestore(&pmu->lock, flags); + + return 0; +} + +static struct reset_control_ops pmu_reset_ops = { + .reset = pmu_reset_reset, + .assert = pmu_reset_assert, + .deassert = pmu_reset_deassert, +}; + +static struct reset_controller_dev pmu_reset __initdata = { + .ops = &pmu_reset_ops, + .owner = THIS_MODULE, + .nr_resets = 32, +}; + +static void __init pmu_reset_init(struct pmu_data *pmu) +{ + int ret; + + pmu->reset = pmu_reset; + pmu->reset.of_node = pmu->of_node; + + ret = reset_controller_register(&pmu->reset); + if (ret) + pr_err("pmu: %s failed: %d\n", "reset_controller_register", ret); +} +#else +static void __init pmu_reset_init(struct pmu_data *pmu) +{ +} +#endif + +struct pmu_domain { + struct pmu_data *pmu; + u32 pwr_mask; + u32 rst_mask; + u32 iso_mask; + struct generic_pm_domain base; +}; + +#define to_pmu_domain(dom) container_of(dom, struct pmu_domain, base) + +/* + * This deals with the "old" Marvell sequence of bringing a power domain + * down/up, which is: apply power, release reset, disable isolators. + * + * Later devices apparantly use a different sequence: power up, disable + * isolators, assert repair signal, enable SRMA clock, enable AXI clock, + * enable module clock, deassert reset. + * + * Note: reading the assembly, it seems that the IO accessors have an + * unfortunate side-effect - they cause memory already read into registers + * for the if () to be re-read for the bit-set or bit-clear operation. + * The code is written to avoid this. + */ +static int pmu_domain_power_off(struct generic_pm_domain *domain) +{ + struct pmu_domain *pmu_dom = to_pmu_domain(domain); + struct pmu_data *pmu = pmu_dom->pmu; + unsigned long flags; + unsigned int val; + void __iomem *pmu_base = pmu->pmu_base; + void __iomem *pmc_base = pmu->pmc_base; + + spin_lock_irqsave(&pmu->lock, flags); + + /* Enable isolators */ + if (pmu_dom->iso_mask) { + val = ~pmu_dom->iso_mask; + val &= readl_relaxed(pmu_base + PMU_ISO); + writel_relaxed(val, pmu_base + PMU_ISO); + } + + /* Reset unit */ + if (pmu_dom->rst_mask) { + val = ~pmu_dom->rst_mask; + val &= readl_relaxed(pmc_base + PMC_SW_RST); + writel_relaxed(val, pmc_base + PMC_SW_RST); + } + + /* Power down */ + val = readl_relaxed(pmu_base + PMU_PWR) | pmu_dom->pwr_mask; + writel_relaxed(val, pmu_base + PMU_PWR); + + spin_unlock_irqrestore(&pmu->lock, flags); + + return 0; +} + +static int pmu_domain_power_on(struct generic_pm_domain *domain) +{ + struct pmu_domain *pmu_dom = to_pmu_domain(domain); + struct pmu_data *pmu = pmu_dom->pmu; + unsigned long flags; + unsigned int val; + void __iomem *pmu_base = pmu->pmu_base; + void __iomem *pmc_base = pmu->pmc_base; + + spin_lock_irqsave(&pmu->lock, flags); + + /* Power on */ + val = ~pmu_dom->pwr_mask & readl_relaxed(pmu_base + PMU_PWR); + writel_relaxed(val, pmu_base + PMU_PWR); + + /* Release reset */ + if (pmu_dom->rst_mask) { + val = pmu_dom->rst_mask; + val |= readl_relaxed(pmc_base + PMC_SW_RST); + writel_relaxed(val, pmc_base + PMC_SW_RST); + } + + /* Disable isolators */ + if (pmu_dom->iso_mask) { + val = pmu_dom->iso_mask; + val |= readl_relaxed(pmu_base + PMU_ISO); + writel_relaxed(val, pmu_base + PMU_ISO); + } + + spin_unlock_irqrestore(&pmu->lock, flags); + + return 0; +} + +static void __pmu_domain_register(struct pmu_domain *domain, + struct device_node *np) +{ + unsigned int val = readl_relaxed(domain->pmu->pmu_base + PMU_PWR); + + domain->base.power_off = pmu_domain_power_off; + domain->base.power_on = pmu_domain_power_on; + + pm_genpd_init(&domain->base, NULL, !(val & domain->pwr_mask)); + + if (np) + of_genpd_add_provider_simple(np, &domain->base); +} + +/* PMU IRQ controller */ +static void pmu_irq_handler(unsigned int irq, struct irq_desc *desc) +{ + struct pmu_data *pmu = irq_get_handler_data(irq); + struct irq_chip_generic *gc = pmu->irq_gc; + struct irq_domain *domain = pmu->irq_domain; + void __iomem *base = gc->reg_base; + u32 stat = readl_relaxed(base + PMC_IRQ_CAUSE) & gc->mask_cache; + u32 done = ~0; + + if (stat == 0) { + handle_bad_irq(irq, desc); + return; + } + + while (stat) { + u32 hwirq = fls(stat) - 1; + + stat &= ~(1 << hwirq); + done &= ~(1 << hwirq); + + generic_handle_irq(irq_find_mapping(domain, hwirq)); + } + + /* + * The PMU mask register is not RW0C: it is RW. This means that + * the bits take whatever value is written to them; if you write + * a '1', you will set the interrupt. + * + * Unfortunately this means there is NO race free way to clear + * these interrupts. + * + * So, let's structure the code so that the window is as small as + * possible. + */ + irq_gc_lock(gc); + done &= readl_relaxed(base + PMC_IRQ_CAUSE); + writel_relaxed(done, base + PMC_IRQ_CAUSE); + irq_gc_unlock(gc); +} + +static int __init dove_init_pmu_irq(struct pmu_data *pmu, int irq) +{ + const char *name = "pmu_irq"; + struct irq_chip_generic *gc; + struct irq_domain *domain; + int ret; + + /* mask and clear all interrupts */ + writel(0, pmu->pmc_base + PMC_IRQ_MASK); + writel(0, pmu->pmc_base + PMC_IRQ_CAUSE); + + domain = irq_domain_add_linear(pmu->of_node, NR_PMU_IRQS, + &irq_generic_chip_ops, NULL); + if (!domain) { + pr_err("%s: unable to add irq domain\n", name); + return -ENOMEM; + } + + ret = irq_alloc_domain_generic_chips(domain, NR_PMU_IRQS, 1, name, + handle_level_irq, + IRQ_NOREQUEST | IRQ_NOPROBE, 0, + IRQ_GC_INIT_MASK_CACHE); + if (ret) { + pr_err("%s: unable to alloc irq domain gc: %d\n", name, ret); + irq_domain_remove(domain); + return ret; + } + + gc = irq_get_domain_generic_chip(domain, 0); + gc->reg_base = pmu->pmc_base; + gc->chip_types[0].regs.mask = PMC_IRQ_MASK; + gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit; + gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit; + + pmu->irq_domain = domain; + pmu->irq_gc = gc; + + irq_set_handler_data(irq, pmu); + irq_set_chained_handler(irq, pmu_irq_handler); + + return 0; +} + +/* + * pmu: power-manager@d0000 { + * compatible = "marvell,dove-pmu"; + * reg = <0xd0000 0x8000> <0xd8000 0x8000>; + * interrupts = <33>; + * interrupt-controller; + * #reset-cells = 1; + * vpu_domain: vpu-domain { + * #power-domain-cells = <0>; + * marvell,pmu_pwr_mask = <0x00000008>; + * marvell,pmu_iso_mask = <0x00000001>; + * resets = <&pmu 16>; + * }; + * gpu_domain: gpu-domain { + * #power-domain-cells = <0>; + * marvell,pmu_pwr_mask = <0x00000004>; + * marvell,pmu_iso_mask = <0x00000002>; + * resets = <&pmu 18>; + * }; + * }; + */ +int __init dove_init_pmu(void) +{ + struct device_node *np_pmu, *domains_node, *np; + struct pmu_data *pmu; + int ret, parent_irq; + + /* Lookup the PMU node */ + np_pmu = of_find_compatible_node(NULL, NULL, "marvell,dove-pmu"); + if (!np_pmu) + return 0; + + domains_node = of_get_child_by_name(np_pmu, "domains"); + if (!domains_node) { + pr_err("%s: failed to find domains sub-node\n", np_pmu->name); + return 0; + } + + pmu = kzalloc(sizeof(*pmu), GFP_KERNEL); + if (!pmu) + return -ENOMEM; + + spin_lock_init(&pmu->lock); + pmu->of_node = np_pmu; + pmu->pmc_base = of_iomap(pmu->of_node, 0); + pmu->pmu_base = of_iomap(pmu->of_node, 1); + if (!pmu->pmc_base || !pmu->pmu_base) { + pr_err("%s: failed to map PMU\n", np_pmu->name); + iounmap(pmu->pmu_base); + iounmap(pmu->pmc_base); + kfree(pmu); + return -ENOMEM; + } + + pmu_reset_init(pmu); + + for_each_available_child_of_node(domains_node, np) { + struct of_phandle_args args; + struct pmu_domain *domain; + + domain = kzalloc(sizeof(*domain), GFP_KERNEL); + if (!domain) + break; + + domain->pmu = pmu; + domain->base.name = kstrdup(np->name, GFP_KERNEL); + if (!domain->base.name) { + kfree(domain); + break; + } + + of_property_read_u32(np, "marvell,pmu_pwr_mask", + &domain->pwr_mask); + of_property_read_u32(np, "marvell,pmu_iso_mask", + &domain->iso_mask); + + /* + * We parse the reset controller property directly here + * to ensure that we can operate when the reset controller + * support is not configured into the kernel. + */ + ret = of_parse_phandle_with_args(np, "resets", "#reset-cells", + 0, &args); + if (ret == 0) { + if (args.np == pmu->of_node) + domain->rst_mask = BIT(args.args[0]); + of_node_put(args.np); + } + + __pmu_domain_register(domain, np); + } + pm_genpd_poweroff_unused(); + + /* Loss of the interrupt controller is not a fatal error. */ + parent_irq = irq_of_parse_and_map(pmu->of_node, 0); + if (!parent_irq) { + pr_err("%s: no interrupt specified\n", np_pmu->name); + } else { + ret = dove_init_pmu_irq(pmu, parent_irq); + if (ret) + pr_err("dove_init_pmu_irq() failed: %d\n", ret); + } + + return 0; +} diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index 5eea374..ba47b70 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -13,7 +13,38 @@ config QCOM_GSBI config QCOM_PM bool "Qualcomm Power Management" depends on ARCH_QCOM && !ARM64 + select QCOM_SCM help QCOM Platform specific power driver to manage cores and L2 low power modes. It interface with various system drivers to put the cores in low power modes. + +config QCOM_SMD + tristate "Qualcomm Shared Memory Driver (SMD)" + depends on QCOM_SMEM + help + Say y here to enable support for the Qualcomm Shared Memory Driver + providing communication channels to remote processors in Qualcomm + platforms. + +config QCOM_SMD_RPM + tristate "Qualcomm Resource Power Manager (RPM) over SMD" + depends on QCOM_SMD && OF + help + If you say yes to this option, support will be included for the + Resource Power Manager system found in the Qualcomm 8974 based + devices. + + This is required to access many regulators, clocks and bus + frequencies controlled by the RPM on these devices. + + Say M here if you want to include support for the Qualcomm RPM as a + module. This will build a module called "qcom-smd-rpm". + +config QCOM_SMEM + tristate "Qualcomm Shared Memory Manager (SMEM)" + depends on ARCH_QCOM + help + Say y here to enable support for the Qualcomm Shared Memory Manager. + The driver provides an interface to items in a heap shared among all + processors in a Qualcomm platform. diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index 931d385..10a93d1 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -1,2 +1,5 @@ obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o obj-$(CONFIG_QCOM_PM) += spm.o +obj-$(CONFIG_QCOM_SMD) += smd.o +obj-$(CONFIG_QCOM_SMD_RPM) += smd-rpm.o +obj-$(CONFIG_QCOM_SMEM) += smem.o diff --git a/drivers/soc/qcom/smd-rpm.c b/drivers/soc/qcom/smd-rpm.c new file mode 100644 index 0000000..1392ccf --- /dev/null +++ b/drivers/soc/qcom/smd-rpm.c @@ -0,0 +1,244 @@ +/* + * Copyright (c) 2015, Sony Mobile Communications AB. + * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/of_platform.h> +#include <linux/io.h> +#include <linux/interrupt.h> + +#include <linux/soc/qcom/smd.h> +#include <linux/soc/qcom/smd-rpm.h> + +#define RPM_REQUEST_TIMEOUT (5 * HZ) + +/** + * struct qcom_smd_rpm - state of the rpm device driver + * @rpm_channel: reference to the smd channel + * @ack: completion for acks + * @lock: mutual exclusion around the send/complete pair + * @ack_status: result of the rpm request + */ +struct qcom_smd_rpm { + struct qcom_smd_channel *rpm_channel; + + struct completion ack; + struct mutex lock; + int ack_status; +}; + +/** + * struct qcom_rpm_header - header for all rpm requests and responses + * @service_type: identifier of the service + * @length: length of the payload + */ +struct qcom_rpm_header { + u32 service_type; + u32 length; +}; + +/** + * struct qcom_rpm_request - request message to the rpm + * @msg_id: identifier of the outgoing message + * @flags: active/sleep state flags + * @type: resource type + * @id: resource id + * @data_len: length of the payload following this header + */ +struct qcom_rpm_request { + u32 msg_id; + u32 flags; + u32 type; + u32 id; + u32 data_len; +}; + +/** + * struct qcom_rpm_message - response message from the rpm + * @msg_type: indicator of the type of message + * @length: the size of this message, including the message header + * @msg_id: message id + * @message: textual message from the rpm + * + * Multiple of these messages can be stacked in an rpm message. + */ +struct qcom_rpm_message { + u32 msg_type; + u32 length; + union { + u32 msg_id; + u8 message[0]; + }; +}; + +#define RPM_SERVICE_TYPE_REQUEST 0x00716572 /* "req\0" */ + +#define RPM_MSG_TYPE_ERR 0x00727265 /* "err\0" */ +#define RPM_MSG_TYPE_MSG_ID 0x2367736d /* "msg#" */ + +/** + * qcom_rpm_smd_write - write @buf to @type:@id + * @rpm: rpm handle + * @type: resource type + * @id: resource identifier + * @buf: the data to be written + * @count: number of bytes in @buf + */ +int qcom_rpm_smd_write(struct qcom_smd_rpm *rpm, + int state, + u32 type, u32 id, + void *buf, + size_t count) +{ + static unsigned msg_id = 1; + int left; + int ret; + + struct { + struct qcom_rpm_header hdr; + struct qcom_rpm_request req; + u8 payload[count]; + } pkt; + + /* SMD packets to the RPM may not exceed 256 bytes */ + if (WARN_ON(sizeof(pkt) >= 256)) + return -EINVAL; + + mutex_lock(&rpm->lock); + + pkt.hdr.service_type = RPM_SERVICE_TYPE_REQUEST; + pkt.hdr.length = sizeof(struct qcom_rpm_request) + count; + + pkt.req.msg_id = msg_id++; + pkt.req.flags = BIT(state); + pkt.req.type = type; + pkt.req.id = id; + pkt.req.data_len = count; + memcpy(pkt.payload, buf, count); + + ret = qcom_smd_send(rpm->rpm_channel, &pkt, sizeof(pkt)); + if (ret) + goto out; + + left = wait_for_completion_timeout(&rpm->ack, RPM_REQUEST_TIMEOUT); + if (!left) + ret = -ETIMEDOUT; + else + ret = rpm->ack_status; + +out: + mutex_unlock(&rpm->lock); + return ret; +} +EXPORT_SYMBOL(qcom_rpm_smd_write); + +static int qcom_smd_rpm_callback(struct qcom_smd_device *qsdev, + const void *data, + size_t count) +{ + const struct qcom_rpm_header *hdr = data; + const struct qcom_rpm_message *msg; + struct qcom_smd_rpm *rpm = dev_get_drvdata(&qsdev->dev); + const u8 *buf = data + sizeof(struct qcom_rpm_header); + const u8 *end = buf + hdr->length; + char msgbuf[32]; + int status = 0; + u32 len; + + if (hdr->service_type != RPM_SERVICE_TYPE_REQUEST || + hdr->length < sizeof(struct qcom_rpm_message)) { + dev_err(&qsdev->dev, "invalid request\n"); + return 0; + } + + while (buf < end) { + msg = (struct qcom_rpm_message *)buf; + switch (msg->msg_type) { + case RPM_MSG_TYPE_MSG_ID: + break; + case RPM_MSG_TYPE_ERR: + len = min_t(u32, ALIGN(msg->length, 4), sizeof(msgbuf)); + memcpy_fromio(msgbuf, msg->message, len); + msgbuf[len - 1] = 0; + + if (!strcmp(msgbuf, "resource does not exist")) + status = -ENXIO; + else + status = -EINVAL; + break; + } + + buf = PTR_ALIGN(buf + 2 * sizeof(u32) + msg->length, 4); + } + + rpm->ack_status = status; + complete(&rpm->ack); + return 0; +} + +static int qcom_smd_rpm_probe(struct qcom_smd_device *sdev) +{ + struct qcom_smd_rpm *rpm; + + rpm = devm_kzalloc(&sdev->dev, sizeof(*rpm), GFP_KERNEL); + if (!rpm) + return -ENOMEM; + + mutex_init(&rpm->lock); + init_completion(&rpm->ack); + + rpm->rpm_channel = sdev->channel; + + dev_set_drvdata(&sdev->dev, rpm); + + return of_platform_populate(sdev->dev.of_node, NULL, NULL, &sdev->dev); +} + +static void qcom_smd_rpm_remove(struct qcom_smd_device *sdev) +{ + of_platform_depopulate(&sdev->dev); +} + +static const struct of_device_id qcom_smd_rpm_of_match[] = { + { .compatible = "qcom,rpm-msm8974" }, + {} +}; +MODULE_DEVICE_TABLE(of, qcom_smd_rpm_of_match); + +static struct qcom_smd_driver qcom_smd_rpm_driver = { + .probe = qcom_smd_rpm_probe, + .remove = qcom_smd_rpm_remove, + .callback = qcom_smd_rpm_callback, + .driver = { + .name = "qcom_smd_rpm", + .owner = THIS_MODULE, + .of_match_table = qcom_smd_rpm_of_match, + }, +}; + +static int __init qcom_smd_rpm_init(void) +{ + return qcom_smd_driver_register(&qcom_smd_rpm_driver); +} +arch_initcall(qcom_smd_rpm_init); + +static void __exit qcom_smd_rpm_exit(void) +{ + qcom_smd_driver_unregister(&qcom_smd_rpm_driver); +} +module_exit(qcom_smd_rpm_exit); + +MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>"); +MODULE_DESCRIPTION("Qualcomm SMD backed RPM driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c new file mode 100644 index 0000000..327adcf --- /dev/null +++ b/drivers/soc/qcom/smd.c @@ -0,0 +1,1319 @@ +/* + * Copyright (c) 2015, Sony Mobile Communications AB. + * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/soc/qcom/smd.h> +#include <linux/soc/qcom/smem.h> +#include <linux/wait.h> + +/* + * The Qualcomm Shared Memory communication solution provides point-to-point + * channels for clients to send and receive streaming or packet based data. + * + * Each channel consists of a control item (channel info) and a ring buffer + * pair. The channel info carry information related to channel state, flow + * control and the offsets within the ring buffer. + * + * All allocated channels are listed in an allocation table, identifying the + * pair of items by name, type and remote processor. + * + * Upon creating a new channel the remote processor allocates channel info and + * ring buffer items from the smem heap and populate the allocation table. An + * interrupt is sent to the other end of the channel and a scan for new + * channels should be done. A channel never goes away, it will only change + * state. + * + * The remote processor signals it intent for bring up the communication + * channel by setting the state of its end of the channel to "opening" and + * sends out an interrupt. We detect this change and register a smd device to + * consume the channel. Upon finding a consumer we finish the handshake and the + * channel is up. + * + * Upon closing a channel, the remote processor will update the state of its + * end of the channel and signal us, we will then unregister any attached + * device and close our end of the channel. + * + * Devices attached to a channel can use the qcom_smd_send function to push + * data to the channel, this is done by copying the data into the tx ring + * buffer, updating the pointers in the channel info and signaling the remote + * processor. + * + * The remote processor does the equivalent when it transfer data and upon + * receiving the interrupt we check the channel info for new data and delivers + * this to the attached device. If the device is not ready to receive the data + * we leave it in the ring buffer for now. + */ + +struct smd_channel_info; +struct smd_channel_info_word; + +#define SMD_ALLOC_TBL_COUNT 2 +#define SMD_ALLOC_TBL_SIZE 64 + +/* + * This lists the various smem heap items relevant for the allocation table and + * smd channel entries. + */ +static const struct { + unsigned alloc_tbl_id; + unsigned info_base_id; + unsigned fifo_base_id; +} smem_items[SMD_ALLOC_TBL_COUNT] = { + { + .alloc_tbl_id = 13, + .info_base_id = 14, + .fifo_base_id = 338 + }, + { + .alloc_tbl_id = 14, + .info_base_id = 266, + .fifo_base_id = 202, + }, +}; + +/** + * struct qcom_smd_edge - representing a remote processor + * @smd: handle to qcom_smd + * @of_node: of_node handle for information related to this edge + * @edge_id: identifier of this edge + * @irq: interrupt for signals on this edge + * @ipc_regmap: regmap handle holding the outgoing ipc register + * @ipc_offset: offset within @ipc_regmap of the register for ipc + * @ipc_bit: bit in the register at @ipc_offset of @ipc_regmap + * @channels: list of all channels detected on this edge + * @channels_lock: guard for modifications of @channels + * @allocated: array of bitmaps representing already allocated channels + * @need_rescan: flag that the @work needs to scan smem for new channels + * @smem_available: last available amount of smem triggering a channel scan + * @work: work item for edge house keeping + */ +struct qcom_smd_edge { + struct qcom_smd *smd; + struct device_node *of_node; + unsigned edge_id; + + int irq; + + struct regmap *ipc_regmap; + int ipc_offset; + int ipc_bit; + + struct list_head channels; + spinlock_t channels_lock; + + DECLARE_BITMAP(allocated[SMD_ALLOC_TBL_COUNT], SMD_ALLOC_TBL_SIZE); + + bool need_rescan; + unsigned smem_available; + + struct work_struct work; +}; + +/* + * SMD channel states. + */ +enum smd_channel_state { + SMD_CHANNEL_CLOSED, + SMD_CHANNEL_OPENING, + SMD_CHANNEL_OPENED, + SMD_CHANNEL_FLUSHING, + SMD_CHANNEL_CLOSING, + SMD_CHANNEL_RESET, + SMD_CHANNEL_RESET_OPENING +}; + +/** + * struct qcom_smd_channel - smd channel struct + * @edge: qcom_smd_edge this channel is living on + * @qsdev: reference to a associated smd client device + * @name: name of the channel + * @state: local state of the channel + * @remote_state: remote state of the channel + * @tx_info: byte aligned outgoing channel info + * @rx_info: byte aligned incoming channel info + * @tx_info_word: word aligned outgoing channel info + * @rx_info_word: word aligned incoming channel info + * @tx_lock: lock to make writes to the channel mutually exclusive + * @fblockread_event: wakeup event tied to tx fBLOCKREADINTR + * @tx_fifo: pointer to the outgoing ring buffer + * @rx_fifo: pointer to the incoming ring buffer + * @fifo_size: size of each ring buffer + * @bounce_buffer: bounce buffer for reading wrapped packets + * @cb: callback function registered for this channel + * @recv_lock: guard for rx info modifications and cb pointer + * @pkt_size: size of the currently handled packet + * @list: lite entry for @channels in qcom_smd_edge + */ +struct qcom_smd_channel { + struct qcom_smd_edge *edge; + + struct qcom_smd_device *qsdev; + + char *name; + enum smd_channel_state state; + enum smd_channel_state remote_state; + + struct smd_channel_info *tx_info; + struct smd_channel_info *rx_info; + + struct smd_channel_info_word *tx_info_word; + struct smd_channel_info_word *rx_info_word; + + struct mutex tx_lock; + wait_queue_head_t fblockread_event; + + void *tx_fifo; + void *rx_fifo; + int fifo_size; + + void *bounce_buffer; + int (*cb)(struct qcom_smd_device *, const void *, size_t); + + spinlock_t recv_lock; + + int pkt_size; + + struct list_head list; +}; + +/** + * struct qcom_smd - smd struct + * @dev: device struct + * @num_edges: number of entries in @edges + * @edges: array of edges to be handled + */ +struct qcom_smd { + struct device *dev; + + unsigned num_edges; + struct qcom_smd_edge edges[0]; +}; + +/* + * Format of the smd_info smem items, for byte aligned channels. + */ +struct smd_channel_info { + u32 state; + u8 fDSR; + u8 fCTS; + u8 fCD; + u8 fRI; + u8 fHEAD; + u8 fTAIL; + u8 fSTATE; + u8 fBLOCKREADINTR; + u32 tail; + u32 head; +}; + +/* + * Format of the smd_info smem items, for word aligned channels. + */ +struct smd_channel_info_word { + u32 state; + u32 fDSR; + u32 fCTS; + u32 fCD; + u32 fRI; + u32 fHEAD; + u32 fTAIL; + u32 fSTATE; + u32 fBLOCKREADINTR; + u32 tail; + u32 head; +}; + +#define GET_RX_CHANNEL_INFO(channel, param) \ + (channel->rx_info_word ? \ + channel->rx_info_word->param : \ + channel->rx_info->param) + +#define SET_RX_CHANNEL_INFO(channel, param, value) \ + (channel->rx_info_word ? \ + (channel->rx_info_word->param = value) : \ + (channel->rx_info->param = value)) + +#define GET_TX_CHANNEL_INFO(channel, param) \ + (channel->tx_info_word ? \ + channel->tx_info_word->param : \ + channel->tx_info->param) + +#define SET_TX_CHANNEL_INFO(channel, param, value) \ + (channel->tx_info_word ? \ + (channel->tx_info_word->param = value) : \ + (channel->tx_info->param = value)) + +/** + * struct qcom_smd_alloc_entry - channel allocation entry + * @name: channel name + * @cid: channel index + * @flags: channel flags and edge id + * @ref_count: reference count of the channel + */ +struct qcom_smd_alloc_entry { + u8 name[20]; + u32 cid; + u32 flags; + u32 ref_count; +} __packed; + +#define SMD_CHANNEL_FLAGS_EDGE_MASK 0xff +#define SMD_CHANNEL_FLAGS_STREAM BIT(8) +#define SMD_CHANNEL_FLAGS_PACKET BIT(9) + +/* + * Each smd packet contains a 20 byte header, with the first 4 being the length + * of the packet. + */ +#define SMD_PACKET_HEADER_LEN 20 + +/* + * Signal the remote processor associated with 'channel'. + */ +static void qcom_smd_signal_channel(struct qcom_smd_channel *channel) +{ + struct qcom_smd_edge *edge = channel->edge; + + regmap_write(edge->ipc_regmap, edge->ipc_offset, BIT(edge->ipc_bit)); +} + +/* + * Initialize the tx channel info + */ +static void qcom_smd_channel_reset(struct qcom_smd_channel *channel) +{ + SET_TX_CHANNEL_INFO(channel, state, SMD_CHANNEL_CLOSED); + SET_TX_CHANNEL_INFO(channel, fDSR, 0); + SET_TX_CHANNEL_INFO(channel, fCTS, 0); + SET_TX_CHANNEL_INFO(channel, fCD, 0); + SET_TX_CHANNEL_INFO(channel, fRI, 0); + SET_TX_CHANNEL_INFO(channel, fHEAD, 0); + SET_TX_CHANNEL_INFO(channel, fTAIL, 0); + SET_TX_CHANNEL_INFO(channel, fSTATE, 1); + SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 0); + SET_TX_CHANNEL_INFO(channel, head, 0); + SET_TX_CHANNEL_INFO(channel, tail, 0); + + qcom_smd_signal_channel(channel); + + channel->state = SMD_CHANNEL_CLOSED; + channel->pkt_size = 0; +} + +/* + * Calculate the amount of data available in the rx fifo + */ +static size_t qcom_smd_channel_get_rx_avail(struct qcom_smd_channel *channel) +{ + unsigned head; + unsigned tail; + + head = GET_RX_CHANNEL_INFO(channel, head); + tail = GET_RX_CHANNEL_INFO(channel, tail); + + return (head - tail) & (channel->fifo_size - 1); +} + +/* + * Set tx channel state and inform the remote processor + */ +static void qcom_smd_channel_set_state(struct qcom_smd_channel *channel, + int state) +{ + struct qcom_smd_edge *edge = channel->edge; + bool is_open = state == SMD_CHANNEL_OPENED; + + if (channel->state == state) + return; + + dev_dbg(edge->smd->dev, "set_state(%s, %d)\n", channel->name, state); + + SET_TX_CHANNEL_INFO(channel, fDSR, is_open); + SET_TX_CHANNEL_INFO(channel, fCTS, is_open); + SET_TX_CHANNEL_INFO(channel, fCD, is_open); + + SET_TX_CHANNEL_INFO(channel, state, state); + SET_TX_CHANNEL_INFO(channel, fSTATE, 1); + + channel->state = state; + qcom_smd_signal_channel(channel); +} + +/* + * Copy count bytes of data using 32bit accesses, if that's required. + */ +static void smd_copy_to_fifo(void __iomem *_dst, + const void *_src, + size_t count, + bool word_aligned) +{ + u32 *dst = (u32 *)_dst; + u32 *src = (u32 *)_src; + + if (word_aligned) { + count /= sizeof(u32); + while (count--) + writel_relaxed(*src++, dst++); + } else { + memcpy_toio(_dst, _src, count); + } +} + +/* + * Copy count bytes of data using 32bit accesses, if that is required. + */ +static void smd_copy_from_fifo(void *_dst, + const void __iomem *_src, + size_t count, + bool word_aligned) +{ + u32 *dst = (u32 *)_dst; + u32 *src = (u32 *)_src; + + if (word_aligned) { + count /= sizeof(u32); + while (count--) + *dst++ = readl_relaxed(src++); + } else { + memcpy_fromio(_dst, _src, count); + } +} + +/* + * Read count bytes of data from the rx fifo into buf, but don't advance the + * tail. + */ +static size_t qcom_smd_channel_peek(struct qcom_smd_channel *channel, + void *buf, size_t count) +{ + bool word_aligned; + unsigned tail; + size_t len; + + word_aligned = channel->rx_info_word != NULL; + tail = GET_RX_CHANNEL_INFO(channel, tail); + + len = min_t(size_t, count, channel->fifo_size - tail); + if (len) { + smd_copy_from_fifo(buf, + channel->rx_fifo + tail, + len, + word_aligned); + } + + if (len != count) { + smd_copy_from_fifo(buf + len, + channel->rx_fifo, + count - len, + word_aligned); + } + + return count; +} + +/* + * Advance the rx tail by count bytes. + */ +static void qcom_smd_channel_advance(struct qcom_smd_channel *channel, + size_t count) +{ + unsigned tail; + + tail = GET_RX_CHANNEL_INFO(channel, tail); + tail += count; + tail &= (channel->fifo_size - 1); + SET_RX_CHANNEL_INFO(channel, tail, tail); +} + +/* + * Read out a single packet from the rx fifo and deliver it to the device + */ +static int qcom_smd_channel_recv_single(struct qcom_smd_channel *channel) +{ + struct qcom_smd_device *qsdev = channel->qsdev; + unsigned tail; + size_t len; + void *ptr; + int ret; + + if (!channel->cb) + return 0; + + tail = GET_RX_CHANNEL_INFO(channel, tail); + + /* Use bounce buffer if the data wraps */ + if (tail + channel->pkt_size >= channel->fifo_size) { + ptr = channel->bounce_buffer; + len = qcom_smd_channel_peek(channel, ptr, channel->pkt_size); + } else { + ptr = channel->rx_fifo + tail; + len = channel->pkt_size; + } + + ret = channel->cb(qsdev, ptr, len); + if (ret < 0) + return ret; + + /* Only forward the tail if the client consumed the data */ + qcom_smd_channel_advance(channel, len); + + channel->pkt_size = 0; + + return 0; +} + +/* + * Per channel interrupt handling + */ +static bool qcom_smd_channel_intr(struct qcom_smd_channel *channel) +{ + bool need_state_scan = false; + int remote_state; + u32 pktlen; + int avail; + int ret; + + /* Handle state changes */ + remote_state = GET_RX_CHANNEL_INFO(channel, state); + if (remote_state != channel->remote_state) { + channel->remote_state = remote_state; + need_state_scan = true; + } + /* Indicate that we have seen any state change */ + SET_RX_CHANNEL_INFO(channel, fSTATE, 0); + + /* Signal waiting qcom_smd_send() about the interrupt */ + if (!GET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR)) + wake_up_interruptible(&channel->fblockread_event); + + /* Don't consume any data until we've opened the channel */ + if (channel->state != SMD_CHANNEL_OPENED) + goto out; + + /* Indicate that we've seen the new data */ + SET_RX_CHANNEL_INFO(channel, fHEAD, 0); + + /* Consume data */ + for (;;) { + avail = qcom_smd_channel_get_rx_avail(channel); + + if (!channel->pkt_size && avail >= SMD_PACKET_HEADER_LEN) { + qcom_smd_channel_peek(channel, &pktlen, sizeof(pktlen)); + qcom_smd_channel_advance(channel, SMD_PACKET_HEADER_LEN); + channel->pkt_size = pktlen; + } else if (channel->pkt_size && avail >= channel->pkt_size) { + ret = qcom_smd_channel_recv_single(channel); + if (ret) + break; + } else { + break; + } + } + + /* Indicate that we have seen and updated tail */ + SET_RX_CHANNEL_INFO(channel, fTAIL, 1); + + /* Signal the remote that we've consumed the data (if requested) */ + if (!GET_RX_CHANNEL_INFO(channel, fBLOCKREADINTR)) { + /* Ensure ordering of channel info updates */ + wmb(); + + qcom_smd_signal_channel(channel); + } + +out: + return need_state_scan; +} + +/* + * The edge interrupts are triggered by the remote processor on state changes, + * channel info updates or when new channels are created. + */ +static irqreturn_t qcom_smd_edge_intr(int irq, void *data) +{ + struct qcom_smd_edge *edge = data; + struct qcom_smd_channel *channel; + unsigned available; + bool kick_worker = false; + + /* + * Handle state changes or data on each of the channels on this edge + */ + spin_lock(&edge->channels_lock); + list_for_each_entry(channel, &edge->channels, list) { + spin_lock(&channel->recv_lock); + kick_worker |= qcom_smd_channel_intr(channel); + spin_unlock(&channel->recv_lock); + } + spin_unlock(&edge->channels_lock); + + /* + * Creating a new channel requires allocating an smem entry, so we only + * have to scan if the amount of available space in smem have changed + * since last scan. + */ + available = qcom_smem_get_free_space(edge->edge_id); + if (available != edge->smem_available) { + edge->smem_available = available; + edge->need_rescan = true; + kick_worker = true; + } + + if (kick_worker) + schedule_work(&edge->work); + + return IRQ_HANDLED; +} + +/* + * Delivers any outstanding packets in the rx fifo, can be used after probe of + * the clients to deliver any packets that wasn't delivered before the client + * was setup. + */ +static void qcom_smd_channel_resume(struct qcom_smd_channel *channel) +{ + unsigned long flags; + + spin_lock_irqsave(&channel->recv_lock, flags); + qcom_smd_channel_intr(channel); + spin_unlock_irqrestore(&channel->recv_lock, flags); +} + +/* + * Calculate how much space is available in the tx fifo. + */ +static size_t qcom_smd_get_tx_avail(struct qcom_smd_channel *channel) +{ + unsigned head; + unsigned tail; + unsigned mask = channel->fifo_size - 1; + + head = GET_TX_CHANNEL_INFO(channel, head); + tail = GET_TX_CHANNEL_INFO(channel, tail); + + return mask - ((head - tail) & mask); +} + +/* + * Write count bytes of data into channel, possibly wrapping in the ring buffer + */ +static int qcom_smd_write_fifo(struct qcom_smd_channel *channel, + const void *data, + size_t count) +{ + bool word_aligned; + unsigned head; + size_t len; + + word_aligned = channel->tx_info_word != NULL; + head = GET_TX_CHANNEL_INFO(channel, head); + + len = min_t(size_t, count, channel->fifo_size - head); + if (len) { + smd_copy_to_fifo(channel->tx_fifo + head, + data, + len, + word_aligned); + } + + if (len != count) { + smd_copy_to_fifo(channel->tx_fifo, + data + len, + count - len, + word_aligned); + } + + head += count; + head &= (channel->fifo_size - 1); + SET_TX_CHANNEL_INFO(channel, head, head); + + return count; +} + +/** + * qcom_smd_send - write data to smd channel + * @channel: channel handle + * @data: buffer of data to write + * @len: number of bytes to write + * + * This is a blocking write of len bytes into the channel's tx ring buffer and + * signal the remote end. It will sleep until there is enough space available + * in the tx buffer, utilizing the fBLOCKREADINTR signaling mechanism to avoid + * polling. + */ +int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len) +{ + u32 hdr[5] = {len,}; + int tlen = sizeof(hdr) + len; + int ret; + + /* Word aligned channels only accept word size aligned data */ + if (channel->rx_info_word != NULL && len % 4) + return -EINVAL; + + ret = mutex_lock_interruptible(&channel->tx_lock); + if (ret) + return ret; + + while (qcom_smd_get_tx_avail(channel) < tlen) { + if (channel->state != SMD_CHANNEL_OPENED) { + ret = -EPIPE; + goto out; + } + + SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 1); + + ret = wait_event_interruptible(channel->fblockread_event, + qcom_smd_get_tx_avail(channel) >= tlen || + channel->state != SMD_CHANNEL_OPENED); + if (ret) + goto out; + + SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 0); + } + + SET_TX_CHANNEL_INFO(channel, fTAIL, 0); + + qcom_smd_write_fifo(channel, hdr, sizeof(hdr)); + qcom_smd_write_fifo(channel, data, len); + + SET_TX_CHANNEL_INFO(channel, fHEAD, 1); + + /* Ensure ordering of channel info updates */ + wmb(); + + qcom_smd_signal_channel(channel); + +out: + mutex_unlock(&channel->tx_lock); + + return ret; +} +EXPORT_SYMBOL(qcom_smd_send); + +static struct qcom_smd_device *to_smd_device(struct device *dev) +{ + return container_of(dev, struct qcom_smd_device, dev); +} + +static struct qcom_smd_driver *to_smd_driver(struct device *dev) +{ + struct qcom_smd_device *qsdev = to_smd_device(dev); + + return container_of(qsdev->dev.driver, struct qcom_smd_driver, driver); +} + +static int qcom_smd_dev_match(struct device *dev, struct device_driver *drv) +{ + return of_driver_match_device(dev, drv); +} + +/* + * Probe the smd client. + * + * The remote side have indicated that it want the channel to be opened, so + * complete the state handshake and probe our client driver. + */ +static int qcom_smd_dev_probe(struct device *dev) +{ + struct qcom_smd_device *qsdev = to_smd_device(dev); + struct qcom_smd_driver *qsdrv = to_smd_driver(dev); + struct qcom_smd_channel *channel = qsdev->channel; + size_t bb_size; + int ret; + + /* + * Packets are maximum 4k, but reduce if the fifo is smaller + */ + bb_size = min(channel->fifo_size, SZ_4K); + channel->bounce_buffer = kmalloc(bb_size, GFP_KERNEL); + if (!channel->bounce_buffer) + return -ENOMEM; + + channel->cb = qsdrv->callback; + + qcom_smd_channel_set_state(channel, SMD_CHANNEL_OPENING); + + qcom_smd_channel_set_state(channel, SMD_CHANNEL_OPENED); + + ret = qsdrv->probe(qsdev); + if (ret) + goto err; + + qcom_smd_channel_resume(channel); + + return 0; + +err: + dev_err(&qsdev->dev, "probe failed\n"); + + channel->cb = NULL; + kfree(channel->bounce_buffer); + channel->bounce_buffer = NULL; + + qcom_smd_channel_set_state(channel, SMD_CHANNEL_CLOSED); + return ret; +} + +/* + * Remove the smd client. + * + * The channel is going away, for some reason, so remove the smd client and + * reset the channel state. + */ +static int qcom_smd_dev_remove(struct device *dev) +{ + struct qcom_smd_device *qsdev = to_smd_device(dev); + struct qcom_smd_driver *qsdrv = to_smd_driver(dev); + struct qcom_smd_channel *channel = qsdev->channel; + unsigned long flags; + + qcom_smd_channel_set_state(channel, SMD_CHANNEL_CLOSING); + + /* + * Make sure we don't race with the code receiving data. + */ + spin_lock_irqsave(&channel->recv_lock, flags); + channel->cb = NULL; + spin_unlock_irqrestore(&channel->recv_lock, flags); + + /* Wake up any sleepers in qcom_smd_send() */ + wake_up_interruptible(&channel->fblockread_event); + + /* + * We expect that the client might block in remove() waiting for any + * outstanding calls to qcom_smd_send() to wake up and finish. + */ + if (qsdrv->remove) + qsdrv->remove(qsdev); + + /* + * The client is now gone, cleanup and reset the channel state. + */ + channel->qsdev = NULL; + kfree(channel->bounce_buffer); + channel->bounce_buffer = NULL; + + qcom_smd_channel_set_state(channel, SMD_CHANNEL_CLOSED); + + qcom_smd_channel_reset(channel); + + return 0; +} + +static struct bus_type qcom_smd_bus = { + .name = "qcom_smd", + .match = qcom_smd_dev_match, + .probe = qcom_smd_dev_probe, + .remove = qcom_smd_dev_remove, +}; + +/* + * Release function for the qcom_smd_device object. + */ +static void qcom_smd_release_device(struct device *dev) +{ + struct qcom_smd_device *qsdev = to_smd_device(dev); + + kfree(qsdev); +} + +/* + * Finds the device_node for the smd child interested in this channel. + */ +static struct device_node *qcom_smd_match_channel(struct device_node *edge_node, + const char *channel) +{ + struct device_node *child; + const char *name; + const char *key; + int ret; + + for_each_available_child_of_node(edge_node, child) { + key = "qcom,smd-channels"; + ret = of_property_read_string(child, key, &name); + if (ret) { + of_node_put(child); + continue; + } + + if (strcmp(name, channel) == 0) + return child; + } + + return NULL; +} + +/* + * Create a smd client device for channel that is being opened. + */ +static int qcom_smd_create_device(struct qcom_smd_channel *channel) +{ + struct qcom_smd_device *qsdev; + struct qcom_smd_edge *edge = channel->edge; + struct device_node *node; + struct qcom_smd *smd = edge->smd; + int ret; + + if (channel->qsdev) + return -EEXIST; + + node = qcom_smd_match_channel(edge->of_node, channel->name); + if (!node) { + dev_dbg(smd->dev, "no match for '%s'\n", channel->name); + return -ENXIO; + } + + dev_dbg(smd->dev, "registering '%s'\n", channel->name); + + qsdev = kzalloc(sizeof(*qsdev), GFP_KERNEL); + if (!qsdev) + return -ENOMEM; + + dev_set_name(&qsdev->dev, "%s.%s", edge->of_node->name, node->name); + qsdev->dev.parent = smd->dev; + qsdev->dev.bus = &qcom_smd_bus; + qsdev->dev.release = qcom_smd_release_device; + qsdev->dev.of_node = node; + + qsdev->channel = channel; + + channel->qsdev = qsdev; + + ret = device_register(&qsdev->dev); + if (ret) { + dev_err(smd->dev, "device_register failed: %d\n", ret); + put_device(&qsdev->dev); + } + + return ret; +} + +/* + * Destroy a smd client device for a channel that's going away. + */ +static void qcom_smd_destroy_device(struct qcom_smd_channel *channel) +{ + struct device *dev; + + BUG_ON(!channel->qsdev); + + dev = &channel->qsdev->dev; + + device_unregister(dev); + of_node_put(dev->of_node); + put_device(dev); +} + +/** + * qcom_smd_driver_register - register a smd driver + * @qsdrv: qcom_smd_driver struct + */ +int qcom_smd_driver_register(struct qcom_smd_driver *qsdrv) +{ + qsdrv->driver.bus = &qcom_smd_bus; + return driver_register(&qsdrv->driver); +} +EXPORT_SYMBOL(qcom_smd_driver_register); + +/** + * qcom_smd_driver_unregister - unregister a smd driver + * @qsdrv: qcom_smd_driver struct + */ +void qcom_smd_driver_unregister(struct qcom_smd_driver *qsdrv) +{ + driver_unregister(&qsdrv->driver); +} +EXPORT_SYMBOL(qcom_smd_driver_unregister); + +/* + * Allocate the qcom_smd_channel object for a newly found smd channel, + * retrieving and validating the smem items involved. + */ +static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *edge, + unsigned smem_info_item, + unsigned smem_fifo_item, + char *name) +{ + struct qcom_smd_channel *channel; + struct qcom_smd *smd = edge->smd; + size_t fifo_size; + size_t info_size; + void *fifo_base; + void *info; + int ret; + + channel = devm_kzalloc(smd->dev, sizeof(*channel), GFP_KERNEL); + if (!channel) + return ERR_PTR(-ENOMEM); + + channel->edge = edge; + channel->name = devm_kstrdup(smd->dev, name, GFP_KERNEL); + if (!channel->name) + return ERR_PTR(-ENOMEM); + + mutex_init(&channel->tx_lock); + spin_lock_init(&channel->recv_lock); + init_waitqueue_head(&channel->fblockread_event); + + ret = qcom_smem_get(edge->edge_id, smem_info_item, (void **)&info, &info_size); + if (ret) + goto free_name_and_channel; + + /* + * Use the size of the item to figure out which channel info struct to + * use. + */ + if (info_size == 2 * sizeof(struct smd_channel_info_word)) { + channel->tx_info_word = info; + channel->rx_info_word = info + sizeof(struct smd_channel_info_word); + } else if (info_size == 2 * sizeof(struct smd_channel_info)) { + channel->tx_info = info; + channel->rx_info = info + sizeof(struct smd_channel_info); + } else { + dev_err(smd->dev, + "channel info of size %zu not supported\n", info_size); + ret = -EINVAL; + goto free_name_and_channel; + } + + ret = qcom_smem_get(edge->edge_id, smem_fifo_item, &fifo_base, &fifo_size); + if (ret) + goto free_name_and_channel; + + /* The channel consist of a rx and tx fifo of equal size */ + fifo_size /= 2; + + dev_dbg(smd->dev, "new channel '%s' info-size: %zu fifo-size: %zu\n", + name, info_size, fifo_size); + + channel->tx_fifo = fifo_base; + channel->rx_fifo = fifo_base + fifo_size; + channel->fifo_size = fifo_size; + + qcom_smd_channel_reset(channel); + + return channel; + +free_name_and_channel: + devm_kfree(smd->dev, channel->name); + devm_kfree(smd->dev, channel); + + return ERR_PTR(ret); +} + +/* + * Scans the allocation table for any newly allocated channels, calls + * qcom_smd_create_channel() to create representations of these and add + * them to the edge's list of channels. + */ +static void qcom_discover_channels(struct qcom_smd_edge *edge) +{ + struct qcom_smd_alloc_entry *alloc_tbl; + struct qcom_smd_alloc_entry *entry; + struct qcom_smd_channel *channel; + struct qcom_smd *smd = edge->smd; + unsigned long flags; + unsigned fifo_id; + unsigned info_id; + int ret; + int tbl; + int i; + + for (tbl = 0; tbl < SMD_ALLOC_TBL_COUNT; tbl++) { + ret = qcom_smem_get(edge->edge_id, + smem_items[tbl].alloc_tbl_id, + (void **)&alloc_tbl, + NULL); + if (ret < 0) + continue; + + for (i = 0; i < SMD_ALLOC_TBL_SIZE; i++) { + entry = &alloc_tbl[i]; + if (test_bit(i, edge->allocated[tbl])) + continue; + + if (entry->ref_count == 0) + continue; + + if (!entry->name[0]) + continue; + + if (!(entry->flags & SMD_CHANNEL_FLAGS_PACKET)) + continue; + + if ((entry->flags & SMD_CHANNEL_FLAGS_EDGE_MASK) != edge->edge_id) + continue; + + info_id = smem_items[tbl].info_base_id + entry->cid; + fifo_id = smem_items[tbl].fifo_base_id + entry->cid; + + channel = qcom_smd_create_channel(edge, info_id, fifo_id, entry->name); + if (IS_ERR(channel)) + continue; + + spin_lock_irqsave(&edge->channels_lock, flags); + list_add(&channel->list, &edge->channels); + spin_unlock_irqrestore(&edge->channels_lock, flags); + + dev_dbg(smd->dev, "new channel found: '%s'\n", channel->name); + set_bit(i, edge->allocated[tbl]); + } + } + + schedule_work(&edge->work); +} + +/* + * This per edge worker scans smem for any new channels and register these. It + * then scans all registered channels for state changes that should be handled + * by creating or destroying smd client devices for the registered channels. + * + * LOCKING: edge->channels_lock is not needed to be held during the traversal + * of the channels list as it's done synchronously with the only writer. + */ +static void qcom_channel_state_worker(struct work_struct *work) +{ + struct qcom_smd_channel *channel; + struct qcom_smd_edge *edge = container_of(work, + struct qcom_smd_edge, + work); + unsigned remote_state; + + /* + * Rescan smem if we have reason to belive that there are new channels. + */ + if (edge->need_rescan) { + edge->need_rescan = false; + qcom_discover_channels(edge); + } + + /* + * Register a device for any closed channel where the remote processor + * is showing interest in opening the channel. + */ + list_for_each_entry(channel, &edge->channels, list) { + if (channel->state != SMD_CHANNEL_CLOSED) + continue; + + remote_state = GET_RX_CHANNEL_INFO(channel, state); + if (remote_state != SMD_CHANNEL_OPENING && + remote_state != SMD_CHANNEL_OPENED) + continue; + + qcom_smd_create_device(channel); + } + + /* + * Unregister the device for any channel that is opened where the + * remote processor is closing the channel. + */ + list_for_each_entry(channel, &edge->channels, list) { + if (channel->state != SMD_CHANNEL_OPENING && + channel->state != SMD_CHANNEL_OPENED) + continue; + + remote_state = GET_RX_CHANNEL_INFO(channel, state); + if (remote_state == SMD_CHANNEL_OPENING || + remote_state == SMD_CHANNEL_OPENED) + continue; + + qcom_smd_destroy_device(channel); + } +} + +/* + * Parses an of_node describing an edge. + */ +static int qcom_smd_parse_edge(struct device *dev, + struct device_node *node, + struct qcom_smd_edge *edge) +{ + struct device_node *syscon_np; + const char *key; + int irq; + int ret; + + INIT_LIST_HEAD(&edge->channels); + spin_lock_init(&edge->channels_lock); + + INIT_WORK(&edge->work, qcom_channel_state_worker); + + edge->of_node = of_node_get(node); + + irq = irq_of_parse_and_map(node, 0); + if (irq < 0) { + dev_err(dev, "required smd interrupt missing\n"); + return -EINVAL; + } + + ret = devm_request_irq(dev, irq, + qcom_smd_edge_intr, IRQF_TRIGGER_RISING, + node->name, edge); + if (ret) { + dev_err(dev, "failed to request smd irq\n"); + return ret; + } + + edge->irq = irq; + + key = "qcom,smd-edge"; + ret = of_property_read_u32(node, key, &edge->edge_id); + if (ret) { + dev_err(dev, "edge missing %s property\n", key); + return -EINVAL; + } + + syscon_np = of_parse_phandle(node, "qcom,ipc", 0); + if (!syscon_np) { + dev_err(dev, "no qcom,ipc node\n"); + return -ENODEV; + } + + edge->ipc_regmap = syscon_node_to_regmap(syscon_np); + if (IS_ERR(edge->ipc_regmap)) + return PTR_ERR(edge->ipc_regmap); + + key = "qcom,ipc"; + ret = of_property_read_u32_index(node, key, 1, &edge->ipc_offset); + if (ret < 0) { + dev_err(dev, "no offset in %s\n", key); + return -EINVAL; + } + + ret = of_property_read_u32_index(node, key, 2, &edge->ipc_bit); + if (ret < 0) { + dev_err(dev, "no bit in %s\n", key); + return -EINVAL; + } + + return 0; +} + +static int qcom_smd_probe(struct platform_device *pdev) +{ + struct qcom_smd_edge *edge; + struct device_node *node; + struct qcom_smd *smd; + size_t array_size; + int num_edges; + int ret; + int i = 0; + + /* Wait for smem */ + ret = qcom_smem_get(QCOM_SMEM_HOST_ANY, smem_items[0].alloc_tbl_id, NULL, NULL); + if (ret == -EPROBE_DEFER) + return ret; + + num_edges = of_get_available_child_count(pdev->dev.of_node); + array_size = sizeof(*smd) + num_edges * sizeof(struct qcom_smd_edge); + smd = devm_kzalloc(&pdev->dev, array_size, GFP_KERNEL); + if (!smd) + return -ENOMEM; + smd->dev = &pdev->dev; + + smd->num_edges = num_edges; + for_each_available_child_of_node(pdev->dev.of_node, node) { + edge = &smd->edges[i++]; + edge->smd = smd; + + ret = qcom_smd_parse_edge(&pdev->dev, node, edge); + if (ret) + continue; + + edge->need_rescan = true; + schedule_work(&edge->work); + } + + platform_set_drvdata(pdev, smd); + + return 0; +} + +/* + * Shut down all smd clients by making sure that each edge stops processing + * events and scanning for new channels, then call destroy on the devices. + */ +static int qcom_smd_remove(struct platform_device *pdev) +{ + struct qcom_smd_channel *channel; + struct qcom_smd_edge *edge; + struct qcom_smd *smd = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < smd->num_edges; i++) { + edge = &smd->edges[i]; + + disable_irq(edge->irq); + cancel_work_sync(&edge->work); + + list_for_each_entry(channel, &edge->channels, list) { + if (!channel->qsdev) + continue; + + qcom_smd_destroy_device(channel); + } + } + + return 0; +} + +static const struct of_device_id qcom_smd_of_match[] = { + { .compatible = "qcom,smd" }, + {} +}; +MODULE_DEVICE_TABLE(of, qcom_smd_of_match); + +static struct platform_driver qcom_smd_driver = { + .probe = qcom_smd_probe, + .remove = qcom_smd_remove, + .driver = { + .name = "qcom-smd", + .of_match_table = qcom_smd_of_match, + }, +}; + +static int __init qcom_smd_init(void) +{ + int ret; + + ret = bus_register(&qcom_smd_bus); + if (ret) { + pr_err("failed to register smd bus: %d\n", ret); + return ret; + } + + return platform_driver_register(&qcom_smd_driver); +} +postcore_initcall(qcom_smd_init); + +static void __exit qcom_smd_exit(void) +{ + platform_driver_unregister(&qcom_smd_driver); + bus_unregister(&qcom_smd_bus); +} +module_exit(qcom_smd_exit); + +MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>"); +MODULE_DESCRIPTION("Qualcomm Shared Memory Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c new file mode 100644 index 0000000..7c2c324c --- /dev/null +++ b/drivers/soc/qcom/smem.c @@ -0,0 +1,775 @@ +/* + * Copyright (c) 2015, Sony Mobile Communications AB. + * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/hwspinlock.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/soc/qcom/smem.h> + +/* + * The Qualcomm shared memory system is a allocate only heap structure that + * consists of one of more memory areas that can be accessed by the processors + * in the SoC. + * + * All systems contains a global heap, accessible by all processors in the SoC, + * with a table of contents data structure (@smem_header) at the beginning of + * the main shared memory block. + * + * The global header contains meta data for allocations as well as a fixed list + * of 512 entries (@smem_global_entry) that can be initialized to reference + * parts of the shared memory space. + * + * + * In addition to this global heap a set of "private" heaps can be set up at + * boot time with access restrictions so that only certain processor pairs can + * access the data. + * + * These partitions are referenced from an optional partition table + * (@smem_ptable), that is found 4kB from the end of the main smem region. The + * partition table entries (@smem_ptable_entry) lists the involved processors + * (or hosts) and their location in the main shared memory region. + * + * Each partition starts with a header (@smem_partition_header) that identifies + * the partition and holds properties for the two internal memory regions. The + * two regions are cached and non-cached memory respectively. Each region + * contain a link list of allocation headers (@smem_private_entry) followed by + * their data. + * + * Items in the non-cached region are allocated from the start of the partition + * while items in the cached region are allocated from the end. The free area + * is hence the region between the cached and non-cached offsets. + * + * + * To synchronize allocations in the shared memory heaps a remote spinlock must + * be held - currently lock number 3 of the sfpb or tcsr is used for this on all + * platforms. + * + */ + +/* + * Item 3 of the global heap contains an array of versions for the various + * software components in the SoC. We verify that the boot loader version is + * what the expected version (SMEM_EXPECTED_VERSION) as a sanity check. + */ +#define SMEM_ITEM_VERSION 3 +#define SMEM_MASTER_SBL_VERSION_INDEX 7 +#define SMEM_EXPECTED_VERSION 11 + +/* + * The first 8 items are only to be allocated by the boot loader while + * initializing the heap. + */ +#define SMEM_ITEM_LAST_FIXED 8 + +/* Highest accepted item number, for both global and private heaps */ +#define SMEM_ITEM_COUNT 512 + +/* Processor/host identifier for the application processor */ +#define SMEM_HOST_APPS 0 + +/* Max number of processors/hosts in a system */ +#define SMEM_HOST_COUNT 9 + +/** + * struct smem_proc_comm - proc_comm communication struct (legacy) + * @command: current command to be executed + * @status: status of the currently requested command + * @params: parameters to the command + */ +struct smem_proc_comm { + u32 command; + u32 status; + u32 params[2]; +}; + +/** + * struct smem_global_entry - entry to reference smem items on the heap + * @allocated: boolean to indicate if this entry is used + * @offset: offset to the allocated space + * @size: size of the allocated space, 8 byte aligned + * @aux_base: base address for the memory region used by this unit, or 0 for + * the default region. bits 0,1 are reserved + */ +struct smem_global_entry { + u32 allocated; + u32 offset; + u32 size; + u32 aux_base; /* bits 1:0 reserved */ +}; +#define AUX_BASE_MASK 0xfffffffc + +/** + * struct smem_header - header found in beginning of primary smem region + * @proc_comm: proc_comm communication interface (legacy) + * @version: array of versions for the various subsystems + * @initialized: boolean to indicate that smem is initialized + * @free_offset: index of the first unallocated byte in smem + * @available: number of bytes available for allocation + * @reserved: reserved field, must be 0 + * toc: array of references to items + */ +struct smem_header { + struct smem_proc_comm proc_comm[4]; + u32 version[32]; + u32 initialized; + u32 free_offset; + u32 available; + u32 reserved; + struct smem_global_entry toc[SMEM_ITEM_COUNT]; +}; + +/** + * struct smem_ptable_entry - one entry in the @smem_ptable list + * @offset: offset, within the main shared memory region, of the partition + * @size: size of the partition + * @flags: flags for the partition (currently unused) + * @host0: first processor/host with access to this partition + * @host1: second processor/host with access to this partition + * @reserved: reserved entries for later use + */ +struct smem_ptable_entry { + u32 offset; + u32 size; + u32 flags; + u16 host0; + u16 host1; + u32 reserved[8]; +}; + +/** + * struct smem_ptable - partition table for the private partitions + * @magic: magic number, must be SMEM_PTABLE_MAGIC + * @version: version of the partition table + * @num_entries: number of partitions in the table + * @reserved: for now reserved entries + * @entry: list of @smem_ptable_entry for the @num_entries partitions + */ +struct smem_ptable { + u32 magic; + u32 version; + u32 num_entries; + u32 reserved[5]; + struct smem_ptable_entry entry[]; +}; +#define SMEM_PTABLE_MAGIC 0x434f5424 /* "$TOC" */ + +/** + * struct smem_partition_header - header of the partitions + * @magic: magic number, must be SMEM_PART_MAGIC + * @host0: first processor/host with access to this partition + * @host1: second processor/host with access to this partition + * @size: size of the partition + * @offset_free_uncached: offset to the first free byte of uncached memory in + * this partition + * @offset_free_cached: offset to the first free byte of cached memory in this + * partition + * @reserved: for now reserved entries + */ +struct smem_partition_header { + u32 magic; + u16 host0; + u16 host1; + u32 size; + u32 offset_free_uncached; + u32 offset_free_cached; + u32 reserved[3]; +}; +#define SMEM_PART_MAGIC 0x54525024 /* "$PRT" */ + +/** + * struct smem_private_entry - header of each item in the private partition + * @canary: magic number, must be SMEM_PRIVATE_CANARY + * @item: identifying number of the smem item + * @size: size of the data, including padding bytes + * @padding_data: number of bytes of padding of data + * @padding_hdr: number of bytes of padding between the header and the data + * @reserved: for now reserved entry + */ +struct smem_private_entry { + u16 canary; + u16 item; + u32 size; /* includes padding bytes */ + u16 padding_data; + u16 padding_hdr; + u32 reserved; +}; +#define SMEM_PRIVATE_CANARY 0xa5a5 + +/** + * struct smem_region - representation of a chunk of memory used for smem + * @aux_base: identifier of aux_mem base + * @virt_base: virtual base address of memory with this aux_mem identifier + * @size: size of the memory region + */ +struct smem_region { + u32 aux_base; + void __iomem *virt_base; + size_t size; +}; + +/** + * struct qcom_smem - device data for the smem device + * @dev: device pointer + * @hwlock: reference to a hwspinlock + * @partitions: list of pointers to partitions affecting the current + * processor/host + * @num_regions: number of @regions + * @regions: list of the memory regions defining the shared memory + */ +struct qcom_smem { + struct device *dev; + + struct hwspinlock *hwlock; + + struct smem_partition_header *partitions[SMEM_HOST_COUNT]; + + unsigned num_regions; + struct smem_region regions[0]; +}; + +/* Pointer to the one and only smem handle */ +static struct qcom_smem *__smem; + +/* Timeout (ms) for the trylock of remote spinlocks */ +#define HWSPINLOCK_TIMEOUT 1000 + +static int qcom_smem_alloc_private(struct qcom_smem *smem, + unsigned host, + unsigned item, + size_t size) +{ + struct smem_partition_header *phdr; + struct smem_private_entry *hdr; + size_t alloc_size; + void *p; + + /* We're not going to find it if there's no matching partition */ + if (host >= SMEM_HOST_COUNT || !smem->partitions[host]) + return -ENOENT; + + phdr = smem->partitions[host]; + + p = (void *)phdr + sizeof(*phdr); + while (p < (void *)phdr + phdr->offset_free_uncached) { + hdr = p; + + if (hdr->canary != SMEM_PRIVATE_CANARY) { + dev_err(smem->dev, + "Found invalid canary in host %d partition\n", + host); + return -EINVAL; + } + + if (hdr->item == item) + return -EEXIST; + + p += sizeof(*hdr) + hdr->padding_hdr + hdr->size; + } + + /* Check that we don't grow into the cached region */ + alloc_size = sizeof(*hdr) + ALIGN(size, 8); + if (p + alloc_size >= (void *)phdr + phdr->offset_free_cached) { + dev_err(smem->dev, "Out of memory\n"); + return -ENOSPC; + } + + hdr = p; + hdr->canary = SMEM_PRIVATE_CANARY; + hdr->item = item; + hdr->size = ALIGN(size, 8); + hdr->padding_data = hdr->size - size; + hdr->padding_hdr = 0; + + /* + * Ensure the header is written before we advance the free offset, so + * that remote processors that does not take the remote spinlock still + * gets a consistent view of the linked list. + */ + wmb(); + phdr->offset_free_uncached += alloc_size; + + return 0; +} + +static int qcom_smem_alloc_global(struct qcom_smem *smem, + unsigned item, + size_t size) +{ + struct smem_header *header; + struct smem_global_entry *entry; + + if (WARN_ON(item >= SMEM_ITEM_COUNT)) + return -EINVAL; + + header = smem->regions[0].virt_base; + entry = &header->toc[item]; + if (entry->allocated) + return -EEXIST; + + size = ALIGN(size, 8); + if (WARN_ON(size > header->available)) + return -ENOMEM; + + entry->offset = header->free_offset; + entry->size = size; + + /* + * Ensure the header is consistent before we mark the item allocated, + * so that remote processors will get a consistent view of the item + * even though they do not take the spinlock on read. + */ + wmb(); + entry->allocated = 1; + + header->free_offset += size; + header->available -= size; + + return 0; +} + +/** + * qcom_smem_alloc() - allocate space for a smem item + * @host: remote processor id, or -1 + * @item: smem item handle + * @size: number of bytes to be allocated + * + * Allocate space for a given smem item of size @size, given that the item is + * not yet allocated. + */ +int qcom_smem_alloc(unsigned host, unsigned item, size_t size) +{ + unsigned long flags; + int ret; + + if (!__smem) + return -EPROBE_DEFER; + + if (item < SMEM_ITEM_LAST_FIXED) { + dev_err(__smem->dev, + "Rejecting allocation of static entry %d\n", item); + return -EINVAL; + } + + ret = hwspin_lock_timeout_irqsave(__smem->hwlock, + HWSPINLOCK_TIMEOUT, + &flags); + if (ret) + return ret; + + ret = qcom_smem_alloc_private(__smem, host, item, size); + if (ret == -ENOENT) + ret = qcom_smem_alloc_global(__smem, item, size); + + hwspin_unlock_irqrestore(__smem->hwlock, &flags); + + return ret; +} +EXPORT_SYMBOL(qcom_smem_alloc); + +static int qcom_smem_get_global(struct qcom_smem *smem, + unsigned item, + void **ptr, + size_t *size) +{ + struct smem_header *header; + struct smem_region *area; + struct smem_global_entry *entry; + u32 aux_base; + unsigned i; + + if (WARN_ON(item >= SMEM_ITEM_COUNT)) + return -EINVAL; + + header = smem->regions[0].virt_base; + entry = &header->toc[item]; + if (!entry->allocated) + return -ENXIO; + + if (ptr != NULL) { + aux_base = entry->aux_base & AUX_BASE_MASK; + + for (i = 0; i < smem->num_regions; i++) { + area = &smem->regions[i]; + + if (area->aux_base == aux_base || !aux_base) { + *ptr = area->virt_base + entry->offset; + break; + } + } + } + if (size != NULL) + *size = entry->size; + + return 0; +} + +static int qcom_smem_get_private(struct qcom_smem *smem, + unsigned host, + unsigned item, + void **ptr, + size_t *size) +{ + struct smem_partition_header *phdr; + struct smem_private_entry *hdr; + void *p; + + /* We're not going to find it if there's no matching partition */ + if (host >= SMEM_HOST_COUNT || !smem->partitions[host]) + return -ENOENT; + + phdr = smem->partitions[host]; + + p = (void *)phdr + sizeof(*phdr); + while (p < (void *)phdr + phdr->offset_free_uncached) { + hdr = p; + + if (hdr->canary != SMEM_PRIVATE_CANARY) { + dev_err(smem->dev, + "Found invalid canary in host %d partition\n", + host); + return -EINVAL; + } + + if (hdr->item == item) { + if (ptr != NULL) + *ptr = p + sizeof(*hdr) + hdr->padding_hdr; + + if (size != NULL) + *size = hdr->size - hdr->padding_data; + + return 0; + } + + p += sizeof(*hdr) + hdr->padding_hdr + hdr->size; + } + + return -ENOENT; +} + +/** + * qcom_smem_get() - resolve ptr of size of a smem item + * @host: the remote processor, or -1 + * @item: smem item handle + * @ptr: pointer to be filled out with address of the item + * @size: pointer to be filled out with size of the item + * + * Looks up pointer and size of a smem item. + */ +int qcom_smem_get(unsigned host, unsigned item, void **ptr, size_t *size) +{ + unsigned long flags; + int ret; + + if (!__smem) + return -EPROBE_DEFER; + + ret = hwspin_lock_timeout_irqsave(__smem->hwlock, + HWSPINLOCK_TIMEOUT, + &flags); + if (ret) + return ret; + + ret = qcom_smem_get_private(__smem, host, item, ptr, size); + if (ret == -ENOENT) + ret = qcom_smem_get_global(__smem, item, ptr, size); + + hwspin_unlock_irqrestore(__smem->hwlock, &flags); + return ret; + +} +EXPORT_SYMBOL(qcom_smem_get); + +/** + * qcom_smem_get_free_space() - retrieve amount of free space in a partition + * @host: the remote processor identifying a partition, or -1 + * + * To be used by smem clients as a quick way to determine if any new + * allocations has been made. + */ +int qcom_smem_get_free_space(unsigned host) +{ + struct smem_partition_header *phdr; + struct smem_header *header; + unsigned ret; + + if (!__smem) + return -EPROBE_DEFER; + + if (host < SMEM_HOST_COUNT && __smem->partitions[host]) { + phdr = __smem->partitions[host]; + ret = phdr->offset_free_cached - phdr->offset_free_uncached; + } else { + header = __smem->regions[0].virt_base; + ret = header->available; + } + + return ret; +} +EXPORT_SYMBOL(qcom_smem_get_free_space); + +static int qcom_smem_get_sbl_version(struct qcom_smem *smem) +{ + unsigned *versions; + size_t size; + int ret; + + ret = qcom_smem_get_global(smem, SMEM_ITEM_VERSION, + (void **)&versions, &size); + if (ret < 0) { + dev_err(smem->dev, "Unable to read the version item\n"); + return -ENOENT; + } + + if (size < sizeof(unsigned) * SMEM_MASTER_SBL_VERSION_INDEX) { + dev_err(smem->dev, "Version item is too small\n"); + return -EINVAL; + } + + return versions[SMEM_MASTER_SBL_VERSION_INDEX]; +} + +static int qcom_smem_enumerate_partitions(struct qcom_smem *smem, + unsigned local_host) +{ + struct smem_partition_header *header; + struct smem_ptable_entry *entry; + struct smem_ptable *ptable; + unsigned remote_host; + int i; + + ptable = smem->regions[0].virt_base + smem->regions[0].size - SZ_4K; + if (ptable->magic != SMEM_PTABLE_MAGIC) + return 0; + + if (ptable->version != 1) { + dev_err(smem->dev, + "Unsupported partition header version %d\n", + ptable->version); + return -EINVAL; + } + + for (i = 0; i < ptable->num_entries; i++) { + entry = &ptable->entry[i]; + + if (entry->host0 != local_host && entry->host1 != local_host) + continue; + + if (!entry->offset) + continue; + + if (!entry->size) + continue; + + if (entry->host0 == local_host) + remote_host = entry->host1; + else + remote_host = entry->host0; + + if (remote_host >= SMEM_HOST_COUNT) { + dev_err(smem->dev, + "Invalid remote host %d\n", + remote_host); + return -EINVAL; + } + + if (smem->partitions[remote_host]) { + dev_err(smem->dev, + "Already found a partition for host %d\n", + remote_host); + return -EINVAL; + } + + header = smem->regions[0].virt_base + entry->offset; + + if (header->magic != SMEM_PART_MAGIC) { + dev_err(smem->dev, + "Partition %d has invalid magic\n", i); + return -EINVAL; + } + + if (header->host0 != local_host && header->host1 != local_host) { + dev_err(smem->dev, + "Partition %d hosts are invalid\n", i); + return -EINVAL; + } + + if (header->host0 != remote_host && header->host1 != remote_host) { + dev_err(smem->dev, + "Partition %d hosts are invalid\n", i); + return -EINVAL; + } + + if (header->size != entry->size) { + dev_err(smem->dev, + "Partition %d has invalid size\n", i); + return -EINVAL; + } + + if (header->offset_free_uncached > header->size) { + dev_err(smem->dev, + "Partition %d has invalid free pointer\n", i); + return -EINVAL; + } + + smem->partitions[remote_host] = header; + } + + return 0; +} + +static int qcom_smem_count_mem_regions(struct platform_device *pdev) +{ + struct resource *res; + int num_regions = 0; + int i; + + for (i = 0; i < pdev->num_resources; i++) { + res = &pdev->resource[i]; + + if (resource_type(res) == IORESOURCE_MEM) + num_regions++; + } + + return num_regions; +} + +static int qcom_smem_probe(struct platform_device *pdev) +{ + struct smem_header *header; + struct device_node *np; + struct qcom_smem *smem; + struct resource *res; + struct resource r; + size_t array_size; + int num_regions = 0; + int hwlock_id; + u32 version; + int ret; + int i; + + num_regions = qcom_smem_count_mem_regions(pdev) + 1; + + array_size = num_regions * sizeof(struct smem_region); + smem = devm_kzalloc(&pdev->dev, sizeof(*smem) + array_size, GFP_KERNEL); + if (!smem) + return -ENOMEM; + + smem->dev = &pdev->dev; + smem->num_regions = num_regions; + + np = of_parse_phandle(pdev->dev.of_node, "memory-region", 0); + if (!np) { + dev_err(&pdev->dev, "No memory-region specified\n"); + return -EINVAL; + } + + ret = of_address_to_resource(np, 0, &r); + of_node_put(np); + if (ret) + return ret; + + smem->regions[0].aux_base = (u32)r.start; + smem->regions[0].size = resource_size(&r); + smem->regions[0].virt_base = devm_ioremap_nocache(&pdev->dev, + r.start, + resource_size(&r)); + if (!smem->regions[0].virt_base) + return -ENOMEM; + + for (i = 1; i < num_regions; i++) { + res = platform_get_resource(pdev, IORESOURCE_MEM, i - 1); + + smem->regions[i].aux_base = (u32)res->start; + smem->regions[i].size = resource_size(res); + smem->regions[i].virt_base = devm_ioremap_nocache(&pdev->dev, + res->start, + resource_size(res)); + if (!smem->regions[i].virt_base) + return -ENOMEM; + } + + header = smem->regions[0].virt_base; + if (header->initialized != 1 || header->reserved) { + dev_err(&pdev->dev, "SMEM is not initialized by SBL\n"); + return -EINVAL; + } + + version = qcom_smem_get_sbl_version(smem); + if (version >> 16 != SMEM_EXPECTED_VERSION) { + dev_err(&pdev->dev, "Unsupported SMEM version 0x%x\n", version); + return -EINVAL; + } + + ret = qcom_smem_enumerate_partitions(smem, SMEM_HOST_APPS); + if (ret < 0) + return ret; + + hwlock_id = of_hwspin_lock_get_id(pdev->dev.of_node, 0); + if (hwlock_id < 0) { + dev_err(&pdev->dev, "failed to retrieve hwlock\n"); + return hwlock_id; + } + + smem->hwlock = hwspin_lock_request_specific(hwlock_id); + if (!smem->hwlock) + return -ENXIO; + + __smem = smem; + + return 0; +} + +static int qcom_smem_remove(struct platform_device *pdev) +{ + __smem = NULL; + hwspin_lock_free(__smem->hwlock); + + return 0; +} + +static const struct of_device_id qcom_smem_of_match[] = { + { .compatible = "qcom,smem" }, + {} +}; +MODULE_DEVICE_TABLE(of, qcom_smem_of_match); + +static struct platform_driver qcom_smem_driver = { + .probe = qcom_smem_probe, + .remove = qcom_smem_remove, + .driver = { + .name = "qcom-smem", + .of_match_table = qcom_smem_of_match, + .suppress_bind_attrs = true, + }, +}; + +static int __init qcom_smem_init(void) +{ + return platform_driver_register(&qcom_smem_driver); +} +arch_initcall(qcom_smem_init); + +static void __exit qcom_smem_exit(void) +{ + platform_driver_unregister(&qcom_smem_driver); +} +module_exit(qcom_smem_exit) + +MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>"); +MODULE_DESCRIPTION("Qualcomm Shared Memory Manager"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/soc/tegra/Makefile b/drivers/soc/tegra/Makefile index cdaad9d..ae857ff 100644 --- a/drivers/soc/tegra/Makefile +++ b/drivers/soc/tegra/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_ARCH_TEGRA) += fuse/ +obj-y += fuse/ -obj-$(CONFIG_ARCH_TEGRA) += common.o -obj-$(CONFIG_ARCH_TEGRA) += pmc.o +obj-y += common.o +obj-y += pmc.o diff --git a/drivers/soc/tegra/common.c b/drivers/soc/tegra/common.c index a71cb74..cd8f413 100644 --- a/drivers/soc/tegra/common.c +++ b/drivers/soc/tegra/common.c @@ -15,6 +15,8 @@ static const struct of_device_id tegra_machine_match[] = { { .compatible = "nvidia,tegra30", }, { .compatible = "nvidia,tegra114", }, { .compatible = "nvidia,tegra124", }, + { .compatible = "nvidia,tegra132", }, + { .compatible = "nvidia,tegra210", }, { } }; diff --git a/drivers/soc/tegra/fuse/Makefile b/drivers/soc/tegra/fuse/Makefile index 3af357d..21bc275 100644 --- a/drivers/soc/tegra/fuse/Makefile +++ b/drivers/soc/tegra/fuse/Makefile @@ -6,3 +6,5 @@ obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += speedo-tegra20.o obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += speedo-tegra30.o obj-$(CONFIG_ARCH_TEGRA_114_SOC) += speedo-tegra114.o obj-$(CONFIG_ARCH_TEGRA_124_SOC) += speedo-tegra124.o +obj-$(CONFIG_ARCH_TEGRA_132_SOC) += speedo-tegra124.o +obj-$(CONFIG_ARCH_TEGRA_210_SOC) += speedo-tegra210.o diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index c0d660f..de2c1bf 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra.c +++ b/drivers/soc/tegra/fuse/fuse-tegra.c @@ -15,9 +15,10 @@ * */ +#include <linux/clk.h> #include <linux/device.h> #include <linux/kobject.h> -#include <linux/kernel.h> +#include <linux/module.h> #include <linux/platform_device.h> #include <linux/of.h> #include <linux/of_address.h> @@ -28,8 +29,6 @@ #include "fuse.h" -static u32 (*fuse_readl)(const unsigned int offset); -static int fuse_size; struct tegra_sku_info tegra_sku_info; EXPORT_SYMBOL(tegra_sku_info); @@ -42,11 +41,11 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = { [TEGRA_REVISION_A04] = "A04", }; -static u8 fuse_readb(const unsigned int offset) +static u8 fuse_readb(struct tegra_fuse *fuse, unsigned int offset) { u32 val; - val = fuse_readl(round_down(offset, 4)); + val = fuse->read(fuse, round_down(offset, 4)); val >>= (offset % 4) * 8; val &= 0xff; @@ -54,19 +53,21 @@ static u8 fuse_readb(const unsigned int offset) } static ssize_t fuse_read(struct file *fd, struct kobject *kobj, - struct bin_attribute *attr, char *buf, - loff_t pos, size_t size) + struct bin_attribute *attr, char *buf, + loff_t pos, size_t size) { + struct device *dev = kobj_to_dev(kobj); + struct tegra_fuse *fuse = dev_get_drvdata(dev); int i; - if (pos < 0 || pos >= fuse_size) + if (pos < 0 || pos >= attr->size) return 0; - if (size > fuse_size - pos) - size = fuse_size - pos; + if (size > attr->size - pos) + size = attr->size - pos; for (i = 0; i < size; i++) - buf[i] = fuse_readb(pos + i); + buf[i] = fuse_readb(fuse, pos + i); return i; } @@ -76,89 +77,239 @@ static struct bin_attribute fuse_bin_attr = { .read = fuse_read, }; +static int tegra_fuse_create_sysfs(struct device *dev, unsigned int size, + const struct tegra_fuse_info *info) +{ + fuse_bin_attr.size = size; + + return device_create_bin_file(dev, &fuse_bin_attr); +} + static const struct of_device_id car_match[] __initconst = { { .compatible = "nvidia,tegra20-car", }, { .compatible = "nvidia,tegra30-car", }, { .compatible = "nvidia,tegra114-car", }, { .compatible = "nvidia,tegra124-car", }, { .compatible = "nvidia,tegra132-car", }, + { .compatible = "nvidia,tegra210-car", }, {}, }; -static void tegra_enable_fuse_clk(void __iomem *base) +static struct tegra_fuse *fuse = &(struct tegra_fuse) { + .base = NULL, + .soc = NULL, +}; + +static const struct of_device_id tegra_fuse_match[] = { +#ifdef CONFIG_ARCH_TEGRA_210_SOC + { .compatible = "nvidia,tegra210-efuse", .data = &tegra210_fuse_soc }, +#endif +#ifdef CONFIG_ARCH_TEGRA_132_SOC + { .compatible = "nvidia,tegra132-efuse", .data = &tegra124_fuse_soc }, +#endif +#ifdef CONFIG_ARCH_TEGRA_124_SOC + { .compatible = "nvidia,tegra124-efuse", .data = &tegra124_fuse_soc }, +#endif +#ifdef CONFIG_ARCH_TEGRA_114_SOC + { .compatible = "nvidia,tegra114-efuse", .data = &tegra114_fuse_soc }, +#endif +#ifdef CONFIG_ARCH_TEGRA_3x_SOC + { .compatible = "nvidia,tegra30-efuse", .data = &tegra30_fuse_soc }, +#endif +#ifdef CONFIG_ARCH_TEGRA_2x_SOC + { .compatible = "nvidia,tegra20-efuse", .data = &tegra20_fuse_soc }, +#endif + { /* sentinel */ } +}; + +static int tegra_fuse_probe(struct platform_device *pdev) { - u32 reg; + void __iomem *base = fuse->base; + struct resource *res; + int err; + + /* take over the memory region from the early initialization */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + fuse->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(fuse->base)) + return PTR_ERR(fuse->base); + + fuse->clk = devm_clk_get(&pdev->dev, "fuse"); + if (IS_ERR(fuse->clk)) { + dev_err(&pdev->dev, "failed to get FUSE clock: %ld", + PTR_ERR(fuse->clk)); + return PTR_ERR(fuse->clk); + } - reg = readl_relaxed(base + 0x48); - reg |= 1 << 28; - writel(reg, base + 0x48); + platform_set_drvdata(pdev, fuse); + fuse->dev = &pdev->dev; - /* - * Enable FUSE clock. This needs to be hardcoded because the clock - * subsystem is not active during early boot. - */ - reg = readl(base + 0x14); - reg |= 1 << 7; - writel(reg, base + 0x14); + if (fuse->soc->probe) { + err = fuse->soc->probe(fuse); + if (err < 0) + return err; + } + + if (tegra_fuse_create_sysfs(&pdev->dev, fuse->soc->info->size, + fuse->soc->info)) + return -ENODEV; + + /* release the early I/O memory mapping */ + iounmap(base); + + return 0; +} + +static struct platform_driver tegra_fuse_driver = { + .driver = { + .name = "tegra-fuse", + .of_match_table = tegra_fuse_match, + .suppress_bind_attrs = true, + }, + .probe = tegra_fuse_probe, +}; +module_platform_driver(tegra_fuse_driver); + +bool __init tegra_fuse_read_spare(unsigned int spare) +{ + unsigned int offset = fuse->soc->info->spare + spare * 4; + + return fuse->read_early(fuse, offset) & 1; +} + +u32 __init tegra_fuse_read_early(unsigned int offset) +{ + return fuse->read_early(fuse, offset); } int tegra_fuse_readl(unsigned long offset, u32 *value) { - if (!fuse_readl) + if (!fuse->read) return -EPROBE_DEFER; - *value = fuse_readl(offset); + *value = fuse->read(fuse, offset); return 0; } EXPORT_SYMBOL(tegra_fuse_readl); -int tegra_fuse_create_sysfs(struct device *dev, int size, - u32 (*readl)(const unsigned int offset)) +static void tegra_enable_fuse_clk(void __iomem *base) { - if (fuse_size) - return -ENODEV; - - fuse_bin_attr.size = size; - fuse_bin_attr.read = fuse_read; + u32 reg; - fuse_size = size; - fuse_readl = readl; + reg = readl_relaxed(base + 0x48); + reg |= 1 << 28; + writel(reg, base + 0x48); - return device_create_bin_file(dev, &fuse_bin_attr); + /* + * Enable FUSE clock. This needs to be hardcoded because the clock + * subsystem is not active during early boot. + */ + reg = readl(base + 0x14); + reg |= 1 << 7; + writel(reg, base + 0x14); } static int __init tegra_init_fuse(void) { + const struct of_device_id *match; struct device_node *np; - void __iomem *car_base; - - if (!soc_is_tegra()) - return 0; + struct resource regs; tegra_init_apbmisc(); - np = of_find_matching_node(NULL, car_match); - car_base = of_iomap(np, 0); - if (car_base) { - tegra_enable_fuse_clk(car_base); - iounmap(car_base); + np = of_find_matching_node_and_match(NULL, tegra_fuse_match, &match); + if (!np) { + /* + * Fall back to legacy initialization for 32-bit ARM only. All + * 64-bit ARM device tree files for Tegra are required to have + * a FUSE node. + * + * This is for backwards-compatibility with old device trees + * that didn't contain a FUSE node. + */ + if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) { + u8 chip = tegra_get_chip_id(); + + regs.start = 0x7000f800; + regs.end = 0x7000fbff; + regs.flags = IORESOURCE_MEM; + + switch (chip) { +#ifdef CONFIG_ARCH_TEGRA_2x_SOC + case TEGRA20: + fuse->soc = &tegra20_fuse_soc; + break; +#endif + +#ifdef CONFIG_ARCH_TEGRA_3x_SOC + case TEGRA30: + fuse->soc = &tegra30_fuse_soc; + break; +#endif + +#ifdef CONFIG_ARCH_TEGRA_114_SOC + case TEGRA114: + fuse->soc = &tegra114_fuse_soc; + break; +#endif + +#ifdef CONFIG_ARCH_TEGRA_124_SOC + case TEGRA124: + fuse->soc = &tegra124_fuse_soc; + break; +#endif + + default: + pr_warn("Unsupported SoC: %02x\n", chip); + break; + } + } else { + /* + * At this point we're not running on Tegra, so play + * nice with multi-platform kernels. + */ + return 0; + } } else { - pr_err("Could not enable fuse clk. ioremap tegra car failed.\n"); + /* + * Extract information from the device tree if we've found a + * matching node. + */ + if (of_address_to_resource(np, 0, ®s) < 0) { + pr_err("failed to get FUSE register\n"); + return -ENXIO; + } + + fuse->soc = match->data; + } + + np = of_find_matching_node(NULL, car_match); + if (np) { + void __iomem *base = of_iomap(np, 0); + if (base) { + tegra_enable_fuse_clk(base); + iounmap(base); + } else { + pr_err("failed to map clock registers\n"); + return -ENXIO; + } + } + + fuse->base = ioremap_nocache(regs.start, resource_size(®s)); + if (!fuse->base) { + pr_err("failed to map FUSE registers\n"); return -ENXIO; } - if (tegra_get_chip_id() == TEGRA20) - tegra20_init_fuse_early(); - else - tegra30_init_fuse_early(); + fuse->soc->init(fuse); - pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n", + pr_info("Tegra Revision: %s SKU: %d CPU Process: %d SoC Process: %d\n", tegra_revision_name[tegra_sku_info.revision], tegra_sku_info.sku_id, tegra_sku_info.cpu_process_id, - tegra_sku_info.core_process_id); - pr_debug("Tegra CPU Speedo ID %d, Soc Speedo ID %d\n", - tegra_sku_info.cpu_speedo_id, tegra_sku_info.soc_speedo_id); + tegra_sku_info.soc_process_id); + pr_debug("Tegra CPU Speedo ID %d, SoC Speedo ID %d\n", + tegra_sku_info.cpu_speedo_id, tegra_sku_info.soc_speedo_id); return 0; } diff --git a/drivers/soc/tegra/fuse/fuse-tegra20.c b/drivers/soc/tegra/fuse/fuse-tegra20.c index 6acc2c4..294413a 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra20.c +++ b/drivers/soc/tegra/fuse/fuse-tegra20.c @@ -34,159 +34,107 @@ #include "fuse.h" #define FUSE_BEGIN 0x100 -#define FUSE_SIZE 0x1f8 #define FUSE_UID_LOW 0x08 #define FUSE_UID_HIGH 0x0c -static phys_addr_t fuse_phys; -static struct clk *fuse_clk; -static void __iomem __initdata *fuse_base; - -static DEFINE_MUTEX(apb_dma_lock); -static DECLARE_COMPLETION(apb_dma_wait); -static struct dma_chan *apb_dma_chan; -static struct dma_slave_config dma_sconfig; -static u32 *apb_buffer; -static dma_addr_t apb_buffer_phys; +static u32 tegra20_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset) +{ + return readl_relaxed(fuse->base + FUSE_BEGIN + offset); +} static void apb_dma_complete(void *args) { - complete(&apb_dma_wait); + struct tegra_fuse *fuse = args; + + complete(&fuse->apbdma.wait); } -static u32 tegra20_fuse_readl(const unsigned int offset) +static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset) { - int ret; - u32 val = 0; + unsigned long flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK; struct dma_async_tx_descriptor *dma_desc; unsigned long time_left; + u32 value = 0; + int err; + + mutex_lock(&fuse->apbdma.lock); - mutex_lock(&apb_dma_lock); + fuse->apbdma.config.src_addr = fuse->apbdma.phys + FUSE_BEGIN + offset; - dma_sconfig.src_addr = fuse_phys + FUSE_BEGIN + offset; - ret = dmaengine_slave_config(apb_dma_chan, &dma_sconfig); - if (ret) + err = dmaengine_slave_config(fuse->apbdma.chan, &fuse->apbdma.config); + if (err) goto out; - dma_desc = dmaengine_prep_slave_single(apb_dma_chan, apb_buffer_phys, - sizeof(u32), DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + dma_desc = dmaengine_prep_slave_single(fuse->apbdma.chan, + fuse->apbdma.phys, + sizeof(u32), DMA_DEV_TO_MEM, + flags); if (!dma_desc) goto out; dma_desc->callback = apb_dma_complete; - dma_desc->callback_param = NULL; + dma_desc->callback_param = fuse; - reinit_completion(&apb_dma_wait); + reinit_completion(&fuse->apbdma.wait); - clk_prepare_enable(fuse_clk); + clk_prepare_enable(fuse->clk); dmaengine_submit(dma_desc); - dma_async_issue_pending(apb_dma_chan); - time_left = wait_for_completion_timeout(&apb_dma_wait, + dma_async_issue_pending(fuse->apbdma.chan); + time_left = wait_for_completion_timeout(&fuse->apbdma.wait, msecs_to_jiffies(50)); if (WARN(time_left == 0, "apb read dma timed out")) - dmaengine_terminate_all(apb_dma_chan); + dmaengine_terminate_all(fuse->apbdma.chan); else - val = *apb_buffer; + value = *fuse->apbdma.virt; - clk_disable_unprepare(fuse_clk); -out: - mutex_unlock(&apb_dma_lock); + clk_disable_unprepare(fuse->clk); - return val; +out: + mutex_unlock(&fuse->apbdma.lock); + return value; } -static const struct of_device_id tegra20_fuse_of_match[] = { - { .compatible = "nvidia,tegra20-efuse" }, - {}, -}; - -static int apb_dma_init(void) +static int tegra20_fuse_probe(struct tegra_fuse *fuse) { dma_cap_mask_t mask; dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - apb_dma_chan = dma_request_channel(mask, NULL, NULL); - if (!apb_dma_chan) + + fuse->apbdma.chan = dma_request_channel(mask, NULL, NULL); + if (!fuse->apbdma.chan) return -EPROBE_DEFER; - apb_buffer = dma_alloc_coherent(NULL, sizeof(u32), &apb_buffer_phys, - GFP_KERNEL); - if (!apb_buffer) { - dma_release_channel(apb_dma_chan); + fuse->apbdma.virt = dma_alloc_coherent(fuse->dev, sizeof(u32), + &fuse->apbdma.phys, + GFP_KERNEL); + if (!fuse->apbdma.virt) { + dma_release_channel(fuse->apbdma.chan); return -ENOMEM; } - dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - dma_sconfig.src_maxburst = 1; - dma_sconfig.dst_maxburst = 1; + fuse->apbdma.config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + fuse->apbdma.config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + fuse->apbdma.config.src_maxburst = 1; + fuse->apbdma.config.dst_maxburst = 1; - return 0; -} - -static int tegra20_fuse_probe(struct platform_device *pdev) -{ - struct resource *res; - int err; - - fuse_clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(fuse_clk)) { - dev_err(&pdev->dev, "missing clock"); - return PTR_ERR(fuse_clk); - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -EINVAL; - fuse_phys = res->start; - - err = apb_dma_init(); - if (err) - return err; - - if (tegra_fuse_create_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl)) - return -ENODEV; - - dev_dbg(&pdev->dev, "loaded\n"); + init_completion(&fuse->apbdma.wait); + mutex_init(&fuse->apbdma.lock); + fuse->read = tegra20_fuse_read; return 0; } -static struct platform_driver tegra20_fuse_driver = { - .probe = tegra20_fuse_probe, - .driver = { - .name = "tegra20_fuse", - .of_match_table = tegra20_fuse_of_match, - } +static const struct tegra_fuse_info tegra20_fuse_info = { + .read = tegra20_fuse_read, + .size = 0x1f8, + .spare = 0x100, }; -static int __init tegra20_fuse_init(void) -{ - return platform_driver_register(&tegra20_fuse_driver); -} -postcore_initcall(tegra20_fuse_init); - /* Early boot code. This code is called before the devices are created */ -u32 __init tegra20_fuse_early(const unsigned int offset) -{ - return readl_relaxed(fuse_base + FUSE_BEGIN + offset); -} - -bool __init tegra20_spare_fuse_early(int spare_bit) -{ - u32 offset = spare_bit * 4; - bool value; - - value = tegra20_fuse_early(offset + 0x100); - - return value; -} - static void __init tegra20_fuse_add_randomness(void) { u32 randomness[7]; @@ -195,22 +143,27 @@ static void __init tegra20_fuse_add_randomness(void) randomness[1] = tegra_read_straps(); randomness[2] = tegra_read_chipid(); randomness[3] = tegra_sku_info.cpu_process_id << 16; - randomness[3] |= tegra_sku_info.core_process_id; + randomness[3] |= tegra_sku_info.soc_process_id; randomness[4] = tegra_sku_info.cpu_speedo_id << 16; randomness[4] |= tegra_sku_info.soc_speedo_id; - randomness[5] = tegra20_fuse_early(FUSE_UID_LOW); - randomness[6] = tegra20_fuse_early(FUSE_UID_HIGH); + randomness[5] = tegra_fuse_read_early(FUSE_UID_LOW); + randomness[6] = tegra_fuse_read_early(FUSE_UID_HIGH); add_device_randomness(randomness, sizeof(randomness)); } -void __init tegra20_init_fuse_early(void) +static void __init tegra20_fuse_init(struct tegra_fuse *fuse) { - fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE); + fuse->read_early = tegra20_fuse_read_early; tegra_init_revision(); - tegra20_init_speedo_data(&tegra_sku_info); + fuse->soc->speedo_init(&tegra_sku_info); tegra20_fuse_add_randomness(); - - iounmap(fuse_base); } + +const struct tegra_fuse_soc tegra20_fuse_soc = { + .init = tegra20_fuse_init, + .speedo_init = tegra20_init_speedo_data, + .probe = tegra20_fuse_probe, + .info = &tegra20_fuse_info, +}; diff --git a/drivers/soc/tegra/fuse/fuse-tegra30.c b/drivers/soc/tegra/fuse/fuse-tegra30.c index 4d2f71b..882607b 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra30.c +++ b/drivers/soc/tegra/fuse/fuse-tegra30.c @@ -42,113 +42,33 @@ #define FUSE_HAS_REVISION_INFO BIT(0) -enum speedo_idx { - SPEEDO_TEGRA30 = 0, - SPEEDO_TEGRA114, - SPEEDO_TEGRA124, -}; - -struct tegra_fuse_info { - int size; - int spare_bit; - enum speedo_idx speedo_idx; -}; - -static void __iomem *fuse_base; -static struct clk *fuse_clk; -static const struct tegra_fuse_info *fuse_info; - -u32 tegra30_fuse_readl(const unsigned int offset) +#if defined(CONFIG_ARCH_TEGRA_3x_SOC) || \ + defined(CONFIG_ARCH_TEGRA_114_SOC) || \ + defined(CONFIG_ARCH_TEGRA_124_SOC) || \ + defined(CONFIG_ARCH_TEGRA_132_SOC) || \ + defined(CONFIG_ARCH_TEGRA_210_SOC) +static u32 tegra30_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset) { - u32 val; - - /* - * early in the boot, the fuse clock will be enabled by - * tegra_init_fuse() - */ - - if (fuse_clk) - clk_prepare_enable(fuse_clk); - - val = readl_relaxed(fuse_base + FUSE_BEGIN + offset); - - if (fuse_clk) - clk_disable_unprepare(fuse_clk); - - return val; + return readl_relaxed(fuse->base + FUSE_BEGIN + offset); } -static const struct tegra_fuse_info tegra30_info = { - .size = 0x2a4, - .spare_bit = 0x144, - .speedo_idx = SPEEDO_TEGRA30, -}; - -static const struct tegra_fuse_info tegra114_info = { - .size = 0x2a0, - .speedo_idx = SPEEDO_TEGRA114, -}; - -static const struct tegra_fuse_info tegra124_info = { - .size = 0x300, - .speedo_idx = SPEEDO_TEGRA124, -}; - -static const struct of_device_id tegra30_fuse_of_match[] = { - { .compatible = "nvidia,tegra30-efuse", .data = &tegra30_info }, - { .compatible = "nvidia,tegra114-efuse", .data = &tegra114_info }, - { .compatible = "nvidia,tegra124-efuse", .data = &tegra124_info }, - {}, -}; - -static int tegra30_fuse_probe(struct platform_device *pdev) +static u32 tegra30_fuse_read(struct tegra_fuse *fuse, unsigned int offset) { - const struct of_device_id *of_dev_id; - - of_dev_id = of_match_device(tegra30_fuse_of_match, &pdev->dev); - if (!of_dev_id) - return -ENODEV; + u32 value; + int err; - fuse_clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(fuse_clk)) { - dev_err(&pdev->dev, "missing clock"); - return PTR_ERR(fuse_clk); + err = clk_prepare_enable(fuse->clk); + if (err < 0) { + dev_err(fuse->dev, "failed to enable FUSE clock: %d\n", err); + return 0; } - platform_set_drvdata(pdev, NULL); - - if (tegra_fuse_create_sysfs(&pdev->dev, fuse_info->size, - tegra30_fuse_readl)) - return -ENODEV; + value = readl_relaxed(fuse->base + FUSE_BEGIN + offset); - dev_dbg(&pdev->dev, "loaded\n"); + clk_disable_unprepare(fuse->clk); - return 0; -} - -static struct platform_driver tegra30_fuse_driver = { - .probe = tegra30_fuse_probe, - .driver = { - .name = "tegra_fuse", - .of_match_table = tegra30_fuse_of_match, - } -}; - -static int __init tegra30_fuse_init(void) -{ - return platform_driver_register(&tegra30_fuse_driver); + return value; } -postcore_initcall(tegra30_fuse_init); - -/* Early boot code. This code is called before the devices are created */ - -typedef void (*speedo_f)(struct tegra_sku_info *sku_info); - -static speedo_f __initdata speedo_tbl[] = { - [SPEEDO_TEGRA30] = tegra30_init_speedo_data, - [SPEEDO_TEGRA114] = tegra114_init_speedo_data, - [SPEEDO_TEGRA124] = tegra124_init_speedo_data, -}; static void __init tegra30_fuse_add_randomness(void) { @@ -158,67 +78,83 @@ static void __init tegra30_fuse_add_randomness(void) randomness[1] = tegra_read_straps(); randomness[2] = tegra_read_chipid(); randomness[3] = tegra_sku_info.cpu_process_id << 16; - randomness[3] |= tegra_sku_info.core_process_id; + randomness[3] |= tegra_sku_info.soc_process_id; randomness[4] = tegra_sku_info.cpu_speedo_id << 16; randomness[4] |= tegra_sku_info.soc_speedo_id; - randomness[5] = tegra30_fuse_readl(FUSE_VENDOR_CODE); - randomness[6] = tegra30_fuse_readl(FUSE_FAB_CODE); - randomness[7] = tegra30_fuse_readl(FUSE_LOT_CODE_0); - randomness[8] = tegra30_fuse_readl(FUSE_LOT_CODE_1); - randomness[9] = tegra30_fuse_readl(FUSE_WAFER_ID); - randomness[10] = tegra30_fuse_readl(FUSE_X_COORDINATE); - randomness[11] = tegra30_fuse_readl(FUSE_Y_COORDINATE); + randomness[5] = tegra_fuse_read_early(FUSE_VENDOR_CODE); + randomness[6] = tegra_fuse_read_early(FUSE_FAB_CODE); + randomness[7] = tegra_fuse_read_early(FUSE_LOT_CODE_0); + randomness[8] = tegra_fuse_read_early(FUSE_LOT_CODE_1); + randomness[9] = tegra_fuse_read_early(FUSE_WAFER_ID); + randomness[10] = tegra_fuse_read_early(FUSE_X_COORDINATE); + randomness[11] = tegra_fuse_read_early(FUSE_Y_COORDINATE); add_device_randomness(randomness, sizeof(randomness)); } -static void __init legacy_fuse_init(void) +static void __init tegra30_fuse_init(struct tegra_fuse *fuse) { - switch (tegra_get_chip_id()) { - case TEGRA30: - fuse_info = &tegra30_info; - break; - case TEGRA114: - fuse_info = &tegra114_info; - break; - case TEGRA124: - case TEGRA132: - fuse_info = &tegra124_info; - break; - default: - return; - } + fuse->read_early = tegra30_fuse_read_early; + fuse->read = tegra30_fuse_read; - fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE); + tegra_init_revision(); + fuse->soc->speedo_init(&tegra_sku_info); + tegra30_fuse_add_randomness(); } +#endif -bool __init tegra30_spare_fuse(int spare_bit) -{ - u32 offset = fuse_info->spare_bit + spare_bit * 4; +#ifdef CONFIG_ARCH_TEGRA_3x_SOC +static const struct tegra_fuse_info tegra30_fuse_info = { + .read = tegra30_fuse_read, + .size = 0x2a4, + .spare = 0x144, +}; - return tegra30_fuse_readl(offset) & 1; -} +const struct tegra_fuse_soc tegra30_fuse_soc = { + .init = tegra30_fuse_init, + .speedo_init = tegra30_init_speedo_data, + .info = &tegra30_fuse_info, +}; +#endif -void __init tegra30_init_fuse_early(void) -{ - struct device_node *np; - const struct of_device_id *of_match; - - np = of_find_matching_node_and_match(NULL, tegra30_fuse_of_match, - &of_match); - if (np) { - fuse_base = of_iomap(np, 0); - fuse_info = (struct tegra_fuse_info *)of_match->data; - } else - legacy_fuse_init(); - - if (!fuse_base) { - pr_warn("fuse DT node missing and unknown chip id: 0x%02x\n", - tegra_get_chip_id()); - return; - } +#ifdef CONFIG_ARCH_TEGRA_114_SOC +static const struct tegra_fuse_info tegra114_fuse_info = { + .read = tegra30_fuse_read, + .size = 0x2a0, + .spare = 0x180, +}; - tegra_init_revision(); - speedo_tbl[fuse_info->speedo_idx](&tegra_sku_info); - tegra30_fuse_add_randomness(); -} +const struct tegra_fuse_soc tegra114_fuse_soc = { + .init = tegra30_fuse_init, + .speedo_init = tegra114_init_speedo_data, + .info = &tegra114_fuse_info, +}; +#endif + +#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC) +static const struct tegra_fuse_info tegra124_fuse_info = { + .read = tegra30_fuse_read, + .size = 0x300, + .spare = 0x200, +}; + +const struct tegra_fuse_soc tegra124_fuse_soc = { + .init = tegra30_fuse_init, + .speedo_init = tegra124_init_speedo_data, + .info = &tegra124_fuse_info, +}; +#endif + +#if defined(CONFIG_ARCH_TEGRA_210_SOC) +static const struct tegra_fuse_info tegra210_fuse_info = { + .read = tegra30_fuse_read, + .size = 0x300, + .spare = 0x280, +}; + +const struct tegra_fuse_soc tegra210_fuse_soc = { + .init = tegra30_fuse_init, + .speedo_init = tegra210_init_speedo_data, + .info = &tegra210_fuse_info, +}; +#endif diff --git a/drivers/soc/tegra/fuse/fuse.h b/drivers/soc/tegra/fuse/fuse.h index 3a398bf3..10c2076 100644 --- a/drivers/soc/tegra/fuse/fuse.h +++ b/drivers/soc/tegra/fuse/fuse.h @@ -19,53 +19,90 @@ #ifndef __DRIVERS_MISC_TEGRA_FUSE_H #define __DRIVERS_MISC_TEGRA_FUSE_H -#define TEGRA_FUSE_BASE 0x7000f800 -#define TEGRA_FUSE_SIZE 0x400 +#include <linux/dmaengine.h> +#include <linux/types.h> -int tegra_fuse_create_sysfs(struct device *dev, int size, - u32 (*readl)(const unsigned int offset)); +struct tegra_fuse; + +struct tegra_fuse_info { + u32 (*read)(struct tegra_fuse *fuse, unsigned int offset); + unsigned int size; + unsigned int spare; +}; + +struct tegra_fuse_soc { + void (*init)(struct tegra_fuse *fuse); + void (*speedo_init)(struct tegra_sku_info *info); + int (*probe)(struct tegra_fuse *fuse); + + const struct tegra_fuse_info *info; +}; + +struct tegra_fuse { + struct device *dev; + void __iomem *base; + phys_addr_t phys; + struct clk *clk; + + u32 (*read_early)(struct tegra_fuse *fuse, unsigned int offset); + u32 (*read)(struct tegra_fuse *fuse, unsigned int offset); + const struct tegra_fuse_soc *soc; + + /* APBDMA on Tegra20 */ + struct { + struct mutex lock; + struct completion wait; + struct dma_chan *chan; + struct dma_slave_config config; + dma_addr_t phys; + u32 *virt; + } apbdma; +}; -bool tegra30_spare_fuse(int bit); -u32 tegra30_fuse_readl(const unsigned int offset); -void tegra30_init_fuse_early(void); void tegra_init_revision(void); void tegra_init_apbmisc(void); +bool __init tegra_fuse_read_spare(unsigned int spare); +u32 __init tegra_fuse_read_early(unsigned int offset); + #ifdef CONFIG_ARCH_TEGRA_2x_SOC void tegra20_init_speedo_data(struct tegra_sku_info *sku_info); -bool tegra20_spare_fuse_early(int spare_bit); -void tegra20_init_fuse_early(void); -u32 tegra20_fuse_early(const unsigned int offset); -#else -static inline void tegra20_init_speedo_data(struct tegra_sku_info *sku_info) {} -static inline bool tegra20_spare_fuse_early(int spare_bit) -{ - return false; -} -static inline void tegra20_init_fuse_early(void) {} -static inline u32 tegra20_fuse_early(const unsigned int offset) -{ - return 0; -} #endif - #ifdef CONFIG_ARCH_TEGRA_3x_SOC void tegra30_init_speedo_data(struct tegra_sku_info *sku_info); -#else -static inline void tegra30_init_speedo_data(struct tegra_sku_info *sku_info) {} #endif #ifdef CONFIG_ARCH_TEGRA_114_SOC void tegra114_init_speedo_data(struct tegra_sku_info *sku_info); -#else -static inline void tegra114_init_speedo_data(struct tegra_sku_info *sku_info) {} #endif -#ifdef CONFIG_ARCH_TEGRA_124_SOC +#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC) void tegra124_init_speedo_data(struct tegra_sku_info *sku_info); -#else -static inline void tegra124_init_speedo_data(struct tegra_sku_info *sku_info) {} +#endif + +#ifdef CONFIG_ARCH_TEGRA_210_SOC +void tegra210_init_speedo_data(struct tegra_sku_info *sku_info); +#endif + +#ifdef CONFIG_ARCH_TEGRA_2x_SOC +extern const struct tegra_fuse_soc tegra20_fuse_soc; +#endif + +#ifdef CONFIG_ARCH_TEGRA_3x_SOC +extern const struct tegra_fuse_soc tegra30_fuse_soc; +#endif + +#ifdef CONFIG_ARCH_TEGRA_114_SOC +extern const struct tegra_fuse_soc tegra114_fuse_soc; +#endif + +#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC) +extern const struct tegra_fuse_soc tegra124_fuse_soc; +#endif + +#ifdef CONFIG_ARCH_TEGRA_210_SOC +extern const struct tegra_fuse_soc tegra210_fuse_soc; #endif #endif diff --git a/drivers/soc/tegra/fuse/speedo-tegra114.c b/drivers/soc/tegra/fuse/speedo-tegra114.c index 2a6ca03..1ba41eb 100644 --- a/drivers/soc/tegra/fuse/speedo-tegra114.c +++ b/drivers/soc/tegra/fuse/speedo-tegra114.c @@ -22,7 +22,7 @@ #include "fuse.h" -#define CORE_PROCESS_CORNERS 2 +#define SOC_PROCESS_CORNERS 2 #define CPU_PROCESS_CORNERS 2 enum { @@ -31,7 +31,7 @@ enum { THRESHOLD_INDEX_COUNT, }; -static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = { +static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = { {1123, UINT_MAX}, {0, UINT_MAX}, }; @@ -74,8 +74,8 @@ static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info, } if (rev == TEGRA_REVISION_A01) { - tmp = tegra30_fuse_readl(0x270) << 1; - tmp |= tegra30_fuse_readl(0x26c); + tmp = tegra_fuse_read_early(0x270) << 1; + tmp |= tegra_fuse_read_early(0x26c); if (!tmp) sku_info->cpu_speedo_id = 0; } @@ -84,27 +84,27 @@ static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info, void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info) { u32 cpu_speedo_val; - u32 core_speedo_val; + u32 soc_speedo_val; int threshold; int i; BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != THRESHOLD_INDEX_COUNT); - BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != + BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) != THRESHOLD_INDEX_COUNT); rev_sku_to_speedo_ids(sku_info, &threshold); - cpu_speedo_val = tegra30_fuse_readl(0x12c) + 1024; - core_speedo_val = tegra30_fuse_readl(0x134); + cpu_speedo_val = tegra_fuse_read_early(0x12c) + 1024; + soc_speedo_val = tegra_fuse_read_early(0x134); for (i = 0; i < CPU_PROCESS_CORNERS; i++) if (cpu_speedo_val < cpu_process_speedos[threshold][i]) break; sku_info->cpu_process_id = i; - for (i = 0; i < CORE_PROCESS_CORNERS; i++) - if (core_speedo_val < core_process_speedos[threshold][i]) + for (i = 0; i < SOC_PROCESS_CORNERS; i++) + if (soc_speedo_val < soc_process_speedos[threshold][i]) break; - sku_info->core_process_id = i; + sku_info->soc_process_id = i; } diff --git a/drivers/soc/tegra/fuse/speedo-tegra124.c b/drivers/soc/tegra/fuse/speedo-tegra124.c index 4636238..a63a134 100644 --- a/drivers/soc/tegra/fuse/speedo-tegra124.c +++ b/drivers/soc/tegra/fuse/speedo-tegra124.c @@ -24,7 +24,7 @@ #define CPU_PROCESS_CORNERS 2 #define GPU_PROCESS_CORNERS 2 -#define CORE_PROCESS_CORNERS 2 +#define SOC_PROCESS_CORNERS 2 #define FUSE_CPU_SPEEDO_0 0x14 #define FUSE_CPU_SPEEDO_1 0x2c @@ -53,7 +53,7 @@ static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = { {0, UINT_MAX}, }; -static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = { +static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = { {2101, UINT_MAX}, {0, UINT_MAX}, }; @@ -119,19 +119,19 @@ void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info) THRESHOLD_INDEX_COUNT); BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) != THRESHOLD_INDEX_COUNT); - BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != + BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) != THRESHOLD_INDEX_COUNT); - cpu_speedo_0_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_0); + cpu_speedo_0_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0); /* GPU Speedo is stored in CPU_SPEEDO_2 */ - sku_info->gpu_speedo_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_2); + sku_info->gpu_speedo_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2); - soc_speedo_0_value = tegra30_fuse_readl(FUSE_SOC_SPEEDO_0); + soc_speedo_0_value = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0); - cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ); - soc_iddq_value = tegra30_fuse_readl(FUSE_SOC_IDDQ); - gpu_iddq_value = tegra30_fuse_readl(FUSE_GPU_IDDQ); + cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ); + soc_iddq_value = tegra_fuse_read_early(FUSE_SOC_IDDQ); + gpu_iddq_value = tegra_fuse_read_early(FUSE_GPU_IDDQ); sku_info->cpu_speedo_value = cpu_speedo_0_value; @@ -143,7 +143,7 @@ void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info) rev_sku_to_speedo_ids(sku_info, &threshold); - sku_info->cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ); + sku_info->cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ); for (i = 0; i < GPU_PROCESS_CORNERS; i++) if (sku_info->gpu_speedo_value < @@ -157,11 +157,11 @@ void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info) break; sku_info->cpu_process_id = i; - for (i = 0; i < CORE_PROCESS_CORNERS; i++) + for (i = 0; i < SOC_PROCESS_CORNERS; i++) if (soc_speedo_0_value < - core_process_speedos[threshold][i]) + soc_process_speedos[threshold][i]) break; - sku_info->core_process_id = i; + sku_info->soc_process_id = i; pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n", sku_info->gpu_speedo_id, sku_info->gpu_speedo_value); diff --git a/drivers/soc/tegra/fuse/speedo-tegra20.c b/drivers/soc/tegra/fuse/speedo-tegra20.c index eff1b63..5f7818b 100644 --- a/drivers/soc/tegra/fuse/speedo-tegra20.c +++ b/drivers/soc/tegra/fuse/speedo-tegra20.c @@ -28,11 +28,11 @@ #define CPU_SPEEDO_REDUND_MSBIT 39 #define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT) -#define CORE_SPEEDO_LSBIT 40 -#define CORE_SPEEDO_MSBIT 47 -#define CORE_SPEEDO_REDUND_LSBIT 48 -#define CORE_SPEEDO_REDUND_MSBIT 55 -#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT) +#define SOC_SPEEDO_LSBIT 40 +#define SOC_SPEEDO_MSBIT 47 +#define SOC_SPEEDO_REDUND_LSBIT 48 +#define SOC_SPEEDO_REDUND_MSBIT 55 +#define SOC_SPEEDO_REDUND_OFFS (SOC_SPEEDO_REDUND_MSBIT - SOC_SPEEDO_MSBIT) #define SPEEDO_MULT 4 @@ -56,7 +56,7 @@ static const u32 __initconst cpu_process_speedos[][PROCESS_CORNERS_NUM] = { {316, 331, 383, UINT_MAX}, }; -static const u32 __initconst core_process_speedos[][PROCESS_CORNERS_NUM] = { +static const u32 __initconst soc_process_speedos[][PROCESS_CORNERS_NUM] = { {165, 195, 224, UINT_MAX}, {165, 195, 224, UINT_MAX}, {165, 195, 224, UINT_MAX}, @@ -69,7 +69,7 @@ void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info) int i; BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT); - BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT); + BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) != SPEEDO_ID_COUNT); if (SPEEDO_ID_SELECT_0(sku_info->revision)) sku_info->soc_speedo_id = SPEEDO_ID_0; @@ -80,8 +80,8 @@ void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info) val = 0; for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) { - reg = tegra20_spare_fuse_early(i) | - tegra20_spare_fuse_early(i + CPU_SPEEDO_REDUND_OFFS); + reg = tegra_fuse_read_spare(i) | + tegra_fuse_read_spare(i + CPU_SPEEDO_REDUND_OFFS); val = (val << 1) | (reg & 0x1); } val = val * SPEEDO_MULT; @@ -94,17 +94,17 @@ void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info) sku_info->cpu_process_id = i; val = 0; - for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) { - reg = tegra20_spare_fuse_early(i) | - tegra20_spare_fuse_early(i + CORE_SPEEDO_REDUND_OFFS); + for (i = SOC_SPEEDO_MSBIT; i >= SOC_SPEEDO_LSBIT; i--) { + reg = tegra_fuse_read_spare(i) | + tegra_fuse_read_spare(i + SOC_SPEEDO_REDUND_OFFS); val = (val << 1) | (reg & 0x1); } val = val * SPEEDO_MULT; pr_debug("Core speedo value %u\n", val); for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) { - if (val <= core_process_speedos[sku_info->soc_speedo_id][i]) + if (val <= soc_process_speedos[sku_info->soc_speedo_id][i]) break; } - sku_info->core_process_id = i; + sku_info->soc_process_id = i; } diff --git a/drivers/soc/tegra/fuse/speedo-tegra210.c b/drivers/soc/tegra/fuse/speedo-tegra210.c new file mode 100644 index 0000000..5373f4c --- /dev/null +++ b/drivers/soc/tegra/fuse/speedo-tegra210.c @@ -0,0 +1,184 @@ +/* + * Copyright (c) 2013-2015, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/bug.h> + +#include <soc/tegra/fuse.h> + +#include "fuse.h" + +#define CPU_PROCESS_CORNERS 2 +#define GPU_PROCESS_CORNERS 2 +#define SOC_PROCESS_CORNERS 3 + +#define FUSE_CPU_SPEEDO_0 0x014 +#define FUSE_CPU_SPEEDO_1 0x02c +#define FUSE_CPU_SPEEDO_2 0x030 +#define FUSE_SOC_SPEEDO_0 0x034 +#define FUSE_SOC_SPEEDO_1 0x038 +#define FUSE_SOC_SPEEDO_2 0x03c +#define FUSE_CPU_IDDQ 0x018 +#define FUSE_SOC_IDDQ 0x040 +#define FUSE_GPU_IDDQ 0x128 +#define FUSE_FT_REV 0x028 + +enum { + THRESHOLD_INDEX_0, + THRESHOLD_INDEX_1, + THRESHOLD_INDEX_COUNT, +}; + +static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = { + { 2119, UINT_MAX }, + { 2119, UINT_MAX }, +}; + +static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = { + { UINT_MAX, UINT_MAX }, + { UINT_MAX, UINT_MAX }, +}; + +static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = { + { 1950, 2100, UINT_MAX }, + { 1950, 2100, UINT_MAX }, +}; + +static u8 __init get_speedo_revision(void) +{ + return tegra_fuse_read_spare(4) << 2 | + tegra_fuse_read_spare(3) << 1 | + tegra_fuse_read_spare(2) << 0; +} + +static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info, + u8 speedo_rev, int *threshold) +{ + int sku = sku_info->sku_id; + + /* Assign to default */ + sku_info->cpu_speedo_id = 0; + sku_info->soc_speedo_id = 0; + sku_info->gpu_speedo_id = 0; + *threshold = THRESHOLD_INDEX_0; + + switch (sku) { + case 0x00: /* Engineering SKU */ + case 0x01: /* Engineering SKU */ + case 0x07: + case 0x17: + case 0x27: + if (speedo_rev >= 2) + sku_info->gpu_speedo_id = 1; + break; + + case 0x13: + if (speedo_rev >= 2) + sku_info->gpu_speedo_id = 1; + + sku_info->cpu_speedo_id = 1; + break; + + default: + pr_err("Tegra210: unknown SKU %#04x\n", sku); + /* Using the default for the error case */ + break; + } +} + +static int get_process_id(int value, const u32 *speedos, unsigned int num) +{ + unsigned int i; + + for (i = 0; i < num; i++) + if (value < speedos[num]) + return i; + + return -EINVAL; +} + +void __init tegra210_init_speedo_data(struct tegra_sku_info *sku_info) +{ + int cpu_speedo[3], soc_speedo[3], cpu_iddq, gpu_iddq, soc_iddq; + unsigned int index; + u8 speedo_revision; + + BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != + THRESHOLD_INDEX_COUNT); + BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) != + THRESHOLD_INDEX_COUNT); + BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) != + THRESHOLD_INDEX_COUNT); + + /* Read speedo/IDDQ fuses */ + cpu_speedo[0] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0); + cpu_speedo[1] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_1); + cpu_speedo[2] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2); + + soc_speedo[0] = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0); + soc_speedo[1] = tegra_fuse_read_early(FUSE_SOC_SPEEDO_1); + soc_speedo[2] = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2); + + cpu_iddq = tegra_fuse_read_early(FUSE_CPU_IDDQ) * 4; + soc_iddq = tegra_fuse_read_early(FUSE_SOC_IDDQ) * 4; + gpu_iddq = tegra_fuse_read_early(FUSE_GPU_IDDQ) * 5; + + /* + * Determine CPU, GPU and SoC speedo values depending on speedo fusing + * revision. Note that GPU speedo value is fused in CPU_SPEEDO_2. + */ + speedo_revision = get_speedo_revision(); + pr_info("Speedo Revision %u\n", speedo_revision); + + if (speedo_revision >= 3) { + sku_info->cpu_speedo_value = cpu_speedo[0]; + sku_info->gpu_speedo_value = cpu_speedo[2]; + sku_info->soc_speedo_value = soc_speedo[0]; + } else if (speedo_revision == 2) { + sku_info->cpu_speedo_value = (-1938 + (1095 * cpu_speedo[0] / 100)) / 10; + sku_info->gpu_speedo_value = (-1662 + (1082 * cpu_speedo[2] / 100)) / 10; + sku_info->soc_speedo_value = ( -705 + (1037 * soc_speedo[0] / 100)) / 10; + } else { + sku_info->cpu_speedo_value = 2100; + sku_info->gpu_speedo_value = cpu_speedo[2] - 75; + sku_info->soc_speedo_value = 1900; + } + + if ((sku_info->cpu_speedo_value <= 0) || + (sku_info->gpu_speedo_value <= 0) || + (sku_info->soc_speedo_value <= 0)) { + WARN(1, "speedo value not fused\n"); + return; + } + + rev_sku_to_speedo_ids(sku_info, speedo_revision, &index); + + sku_info->gpu_process_id = get_process_id(sku_info->gpu_speedo_value, + gpu_process_speedos[index], + GPU_PROCESS_CORNERS); + + sku_info->cpu_process_id = get_process_id(sku_info->cpu_speedo_value, + cpu_process_speedos[index], + CPU_PROCESS_CORNERS); + + sku_info->soc_process_id = get_process_id(sku_info->soc_speedo_value, + soc_process_speedos[index], + SOC_PROCESS_CORNERS); + + pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n", + sku_info->gpu_speedo_id, sku_info->gpu_speedo_value); +} diff --git a/drivers/soc/tegra/fuse/speedo-tegra30.c b/drivers/soc/tegra/fuse/speedo-tegra30.c index b17f0dc..9b010b3 100644 --- a/drivers/soc/tegra/fuse/speedo-tegra30.c +++ b/drivers/soc/tegra/fuse/speedo-tegra30.c @@ -22,7 +22,7 @@ #include "fuse.h" -#define CORE_PROCESS_CORNERS 1 +#define SOC_PROCESS_CORNERS 1 #define CPU_PROCESS_CORNERS 6 #define FUSE_SPEEDO_CALIB_0 0x14 @@ -54,7 +54,7 @@ enum { THRESHOLD_INDEX_COUNT, }; -static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = { +static const u32 __initconst soc_process_speedos[][SOC_PROCESS_CORNERS] = { {180}, {170}, {195}, @@ -93,25 +93,25 @@ static void __init fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp) int bit_minus1; int bit_minus2; - reg = tegra30_fuse_readl(FUSE_SPEEDO_CALIB_0); + reg = tegra_fuse_read_early(FUSE_SPEEDO_CALIB_0); *speedo_lp = (reg & 0xFFFF) * 4; *speedo_g = ((reg >> 16) & 0xFFFF) * 4; - ate_ver = tegra30_fuse_readl(FUSE_TEST_PROG_VER); + ate_ver = tegra_fuse_read_early(FUSE_TEST_PROG_VER); pr_debug("Tegra ATE prog ver %d.%d\n", ate_ver/10, ate_ver%10); if (ate_ver >= 26) { - bit_minus1 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1); - bit_minus1 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1_R); - bit_minus2 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2); - bit_minus2 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2_R); + bit_minus1 = tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS1); + bit_minus1 |= tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS1_R); + bit_minus2 = tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS2); + bit_minus2 |= tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS2_R); *speedo_lp |= (bit_minus1 << 1) | bit_minus2; - bit_minus1 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1); - bit_minus1 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1_R); - bit_minus2 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2); - bit_minus2 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2_R); + bit_minus1 = tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS1); + bit_minus1 |= tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS1_R); + bit_minus2 = tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS2); + bit_minus2 |= tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS2_R); *speedo_g |= (bit_minus1 << 1) | bit_minus2; } else { *speedo_lp |= 0x3; @@ -121,7 +121,7 @@ static void __init fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp) static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info) { - int package_id = tegra30_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F; + int package_id = tegra_fuse_read_early(FUSE_PACKAGE_INFO) & 0x0F; switch (sku_info->revision) { case TEGRA_REVISION_A01: @@ -246,19 +246,19 @@ static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info) void __init tegra30_init_speedo_data(struct tegra_sku_info *sku_info) { u32 cpu_speedo_val; - u32 core_speedo_val; + u32 soc_speedo_val; int i; BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != THRESHOLD_INDEX_COUNT); - BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != + BUILD_BUG_ON(ARRAY_SIZE(soc_process_speedos) != THRESHOLD_INDEX_COUNT); rev_sku_to_speedo_ids(sku_info); - fuse_speedo_calib(&cpu_speedo_val, &core_speedo_val); + fuse_speedo_calib(&cpu_speedo_val, &soc_speedo_val); pr_debug("Tegra CPU speedo value %u\n", cpu_speedo_val); - pr_debug("Tegra Core speedo value %u\n", core_speedo_val); + pr_debug("Tegra Core speedo value %u\n", soc_speedo_val); for (i = 0; i < CPU_PROCESS_CORNERS; i++) { if (cpu_speedo_val < cpu_process_speedos[threshold_index][i]) @@ -273,16 +273,16 @@ void __init tegra30_init_speedo_data(struct tegra_sku_info *sku_info) sku_info->cpu_speedo_id = 1; } - for (i = 0; i < CORE_PROCESS_CORNERS; i++) { - if (core_speedo_val < core_process_speedos[threshold_index][i]) + for (i = 0; i < SOC_PROCESS_CORNERS; i++) { + if (soc_speedo_val < soc_process_speedos[threshold_index][i]) break; } - sku_info->core_process_id = i - 1; + sku_info->soc_process_id = i - 1; - if (sku_info->core_process_id == -1) { - pr_warn("Tegra CORE speedo value %3d out of range", - core_speedo_val); - sku_info->core_process_id = 0; + if (sku_info->soc_process_id == -1) { + pr_warn("Tegra SoC speedo value %3d out of range", + soc_speedo_val); + sku_info->soc_process_id = 0; sku_info->soc_speedo_id = 1; } } diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c index 73fad05..5b18f6f 100644 --- a/drivers/soc/tegra/fuse/tegra-apbmisc.c +++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c @@ -21,11 +21,10 @@ #include <linux/io.h> #include <soc/tegra/fuse.h> +#include <soc/tegra/common.h> #include "fuse.h" -#define APBMISC_BASE 0x70000800 -#define APBMISC_SIZE 0x64 #define FUSE_SKU_INFO 0x10 #define PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT 4 @@ -95,8 +94,8 @@ void __init tegra_init_revision(void) rev = TEGRA_REVISION_A02; break; case 3: - if (chip_id == TEGRA20 && (tegra20_spare_fuse_early(18) || - tegra20_spare_fuse_early(19))) + if (chip_id == TEGRA20 && (tegra_fuse_read_spare(18) || + tegra_fuse_read_spare(19))) rev = TEGRA_REVISION_A03p; else rev = TEGRA_REVISION_A03; @@ -110,27 +109,74 @@ void __init tegra_init_revision(void) tegra_sku_info.revision = rev; - if (chip_id == TEGRA20) - tegra_sku_info.sku_id = tegra20_fuse_early(FUSE_SKU_INFO); - else - tegra_sku_info.sku_id = tegra30_fuse_readl(FUSE_SKU_INFO); + tegra_sku_info.sku_id = tegra_fuse_read_early(FUSE_SKU_INFO); } void __init tegra_init_apbmisc(void) { + struct resource apbmisc, straps; struct device_node *np; np = of_find_matching_node(NULL, apbmisc_match); - apbmisc_base = of_iomap(np, 0); - if (!apbmisc_base) { - pr_warn("ioremap tegra apbmisc failed. using %08x instead\n", - APBMISC_BASE); - apbmisc_base = ioremap(APBMISC_BASE, APBMISC_SIZE); + if (!np) { + /* + * Fall back to legacy initialization for 32-bit ARM only. All + * 64-bit ARM device tree files for Tegra are required to have + * an APBMISC node. + * + * This is for backwards-compatibility with old device trees + * that didn't contain an APBMISC node. + */ + if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) { + /* APBMISC registers (chip revision, ...) */ + apbmisc.start = 0x70000800; + apbmisc.end = 0x70000863; + apbmisc.flags = IORESOURCE_MEM; + + /* strapping options */ + if (tegra_get_chip_id() == TEGRA124) { + straps.start = 0x7000e864; + straps.end = 0x7000e867; + } else { + straps.start = 0x70000008; + straps.end = 0x7000000b; + } + + straps.flags = IORESOURCE_MEM; + + pr_warn("Using APBMISC region %pR\n", &apbmisc); + pr_warn("Using strapping options registers %pR\n", + &straps); + } else { + /* + * At this point we're not running on Tegra, so play + * nice with multi-platform kernels. + */ + return; + } + } else { + /* + * Extract information from the device tree if we've found a + * matching node. + */ + if (of_address_to_resource(np, 0, &apbmisc) < 0) { + pr_err("failed to get APBMISC registers\n"); + return; + } + + if (of_address_to_resource(np, 1, &straps) < 0) { + pr_err("failed to get strapping options registers\n"); + return; + } } - strapping_base = of_iomap(np, 1); + apbmisc_base = ioremap_nocache(apbmisc.start, resource_size(&apbmisc)); + if (!apbmisc_base) + pr_err("failed to map APBMISC registers\n"); + + strapping_base = ioremap_nocache(straps.start, resource_size(&straps)); if (!strapping_base) - pr_err("ioremap tegra strapping_base failed\n"); + pr_err("failed to map strapping options registers\n"); long_ram_code = of_property_read_bool(np, "nvidia,long-ram-code"); } diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index 75d0457..bc34cf7 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -17,6 +17,8 @@ * */ +#define pr_fmt(fmt) "tegra-pmc: " fmt + #include <linux/kernel.h> #include <linux/clk.h> #include <linux/clk/tegra.h> @@ -457,7 +459,6 @@ static int tegra_io_rail_prepare(int id, unsigned long *request, unsigned long *status, unsigned int *bit) { unsigned long rate, value; - struct clk *clk; *bit = id % 32; @@ -476,12 +477,7 @@ static int tegra_io_rail_prepare(int id, unsigned long *request, *request = IO_DPD2_REQ; } - clk = clk_get_sys(NULL, "pclk"); - if (IS_ERR(clk)) - return PTR_ERR(clk); - - rate = clk_get_rate(clk); - clk_put(clk); + rate = clk_get_rate(pmc->clk); tegra_pmc_writel(DPD_SAMPLE_ENABLE, DPD_SAMPLE); @@ -535,8 +531,10 @@ int tegra_io_rail_power_on(int id) tegra_pmc_writel(value, request); err = tegra_io_rail_poll(status, mask, 0, 250); - if (err < 0) + if (err < 0) { + pr_info("tegra_io_rail_poll() failed: %d\n", err); return err; + } tegra_io_rail_unprepare(); @@ -551,8 +549,10 @@ int tegra_io_rail_power_off(int id) int err; err = tegra_io_rail_prepare(id, &request, &status, &bit); - if (err < 0) + if (err < 0) { + pr_info("tegra_io_rail_prepare() failed: %d\n", err); return err; + } mask = 1 << bit; @@ -736,12 +736,12 @@ void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc) u32 value, checksum; if (!pmc->soc->has_tsense_reset) - goto out; + return; np = of_find_node_by_name(pmc->dev->of_node, "i2c-thermtrip"); if (!np) { dev_warn(dev, "i2c-thermtrip node not found, %s.\n", disabled); - goto out; + return; } if (of_property_read_u32(np, "nvidia,i2c-controller-id", &ctrl_id)) { @@ -801,7 +801,6 @@ void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc) out: of_node_put(np); - return; } static int tegra_pmc_probe(struct platform_device *pdev) @@ -1002,7 +1001,56 @@ static const struct tegra_pmc_soc tegra124_pmc_soc = { .has_gpu_clamps = true, }; +static const char * const tegra210_powergates[] = { + [TEGRA_POWERGATE_CPU] = "crail", + [TEGRA_POWERGATE_3D] = "3d", + [TEGRA_POWERGATE_VENC] = "venc", + [TEGRA_POWERGATE_PCIE] = "pcie", + [TEGRA_POWERGATE_L2] = "l2", + [TEGRA_POWERGATE_MPE] = "mpe", + [TEGRA_POWERGATE_HEG] = "heg", + [TEGRA_POWERGATE_SATA] = "sata", + [TEGRA_POWERGATE_CPU1] = "cpu1", + [TEGRA_POWERGATE_CPU2] = "cpu2", + [TEGRA_POWERGATE_CPU3] = "cpu3", + [TEGRA_POWERGATE_CELP] = "celp", + [TEGRA_POWERGATE_CPU0] = "cpu0", + [TEGRA_POWERGATE_C0NC] = "c0nc", + [TEGRA_POWERGATE_C1NC] = "c1nc", + [TEGRA_POWERGATE_SOR] = "sor", + [TEGRA_POWERGATE_DIS] = "dis", + [TEGRA_POWERGATE_DISB] = "disb", + [TEGRA_POWERGATE_XUSBA] = "xusba", + [TEGRA_POWERGATE_XUSBB] = "xusbb", + [TEGRA_POWERGATE_XUSBC] = "xusbc", + [TEGRA_POWERGATE_VIC] = "vic", + [TEGRA_POWERGATE_IRAM] = "iram", + [TEGRA_POWERGATE_NVDEC] = "nvdec", + [TEGRA_POWERGATE_NVJPG] = "nvjpg", + [TEGRA_POWERGATE_AUD] = "aud", + [TEGRA_POWERGATE_DFD] = "dfd", + [TEGRA_POWERGATE_VE2] = "ve2", +}; + +static const u8 tegra210_cpu_powergates[] = { + TEGRA_POWERGATE_CPU0, + TEGRA_POWERGATE_CPU1, + TEGRA_POWERGATE_CPU2, + TEGRA_POWERGATE_CPU3, +}; + +static const struct tegra_pmc_soc tegra210_pmc_soc = { + .num_powergates = ARRAY_SIZE(tegra210_powergates), + .powergates = tegra210_powergates, + .num_cpu_powergates = ARRAY_SIZE(tegra210_cpu_powergates), + .cpu_powergates = tegra210_cpu_powergates, + .has_tsense_reset = true, + .has_gpu_clamps = true, +}; + static const struct of_device_id tegra_pmc_match[] = { + { .compatible = "nvidia,tegra210-pmc", .data = &tegra210_pmc_soc }, + { .compatible = "nvidia,tegra132-pmc", .data = &tegra124_pmc_soc }, { .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc }, { .compatible = "nvidia,tegra114-pmc", .data = &tegra114_pmc_soc }, { .compatible = "nvidia,tegra30-pmc", .data = &tegra30_pmc_soc }, @@ -1035,25 +1083,44 @@ static int __init tegra_pmc_early_init(void) bool invert; u32 value; - if (!soc_is_tegra()) - return 0; - np = of_find_matching_node_and_match(NULL, tegra_pmc_match, &match); if (!np) { - pr_warn("PMC device node not found, disabling powergating\n"); - - regs.start = 0x7000e400; - regs.end = 0x7000e7ff; - regs.flags = IORESOURCE_MEM; - - pr_warn("Using memory region %pR\n", ®s); + /* + * Fall back to legacy initialization for 32-bit ARM only. All + * 64-bit ARM device tree files for Tegra are required to have + * a PMC node. + * + * This is for backwards-compatibility with old device trees + * that didn't contain a PMC node. Note that in this case the + * SoC data can't be matched and therefore powergating is + * disabled. + */ + if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) { + pr_warn("DT node not found, powergating disabled\n"); + + regs.start = 0x7000e400; + regs.end = 0x7000e7ff; + regs.flags = IORESOURCE_MEM; + + pr_warn("Using memory region %pR\n", ®s); + } else { + /* + * At this point we're not running on Tegra, so play + * nice with multi-platform kernels. + */ + return 0; + } } else { - pmc->soc = match->data; - } + /* + * Extract information from the device tree if we've found a + * matching node. + */ + if (of_address_to_resource(np, 0, ®s) < 0) { + pr_err("failed to get PMC registers\n"); + return -ENXIO; + } - if (of_address_to_resource(np, 0, ®s) < 0) { - pr_err("failed to get PMC registers\n"); - return -ENXIO; + pmc->soc = match->data; } pmc->base = ioremap_nocache(regs.start, resource_size(®s)); @@ -1064,6 +1131,10 @@ static int __init tegra_pmc_early_init(void) mutex_init(&pmc->powergates_lock); + /* + * Invert the interrupt polarity if a PMC device tree node exists and + * contains the nvidia,invert-interrupt property. + */ invert = of_property_read_bool(np, "nvidia,invert-interrupt"); value = tegra_pmc_readl(PMC_CNTRL); diff --git a/include/dt-bindings/memory/tegra210-mc.h b/include/dt-bindings/memory/tegra210-mc.h new file mode 100644 index 0000000..d1731bc --- /dev/null +++ b/include/dt-bindings/memory/tegra210-mc.h @@ -0,0 +1,36 @@ +#ifndef DT_BINDINGS_MEMORY_TEGRA210_MC_H +#define DT_BINDINGS_MEMORY_TEGRA210_MC_H + +#define TEGRA_SWGROUP_PTC 0 +#define TEGRA_SWGROUP_DC 1 +#define TEGRA_SWGROUP_DCB 2 +#define TEGRA_SWGROUP_AFI 3 +#define TEGRA_SWGROUP_AVPC 4 +#define TEGRA_SWGROUP_HDA 5 +#define TEGRA_SWGROUP_HC 6 +#define TEGRA_SWGROUP_NVENC 7 +#define TEGRA_SWGROUP_PPCS 8 +#define TEGRA_SWGROUP_SATA 9 +#define TEGRA_SWGROUP_MPCORE 10 +#define TEGRA_SWGROUP_ISP2 11 +#define TEGRA_SWGROUP_XUSB_HOST 12 +#define TEGRA_SWGROUP_XUSB_DEV 13 +#define TEGRA_SWGROUP_ISP2B 14 +#define TEGRA_SWGROUP_TSEC 15 +#define TEGRA_SWGROUP_A9AVP 16 +#define TEGRA_SWGROUP_GPU 17 +#define TEGRA_SWGROUP_SDMMC1A 18 +#define TEGRA_SWGROUP_SDMMC2A 19 +#define TEGRA_SWGROUP_SDMMC3A 20 +#define TEGRA_SWGROUP_SDMMC4A 21 +#define TEGRA_SWGROUP_VIC 22 +#define TEGRA_SWGROUP_VI 23 +#define TEGRA_SWGROUP_NVDEC 24 +#define TEGRA_SWGROUP_APE 25 +#define TEGRA_SWGROUP_NVJPG 26 +#define TEGRA_SWGROUP_SE 27 +#define TEGRA_SWGROUP_AXIAP 28 +#define TEGRA_SWGROUP_ETR 29 +#define TEGRA_SWGROUP_TSECB 30 + +#endif diff --git a/include/dt-bindings/reset-controller/stih407-resets.h b/include/dt-bindings/reset/stih407-resets.h index 02d4328..02d4328 100644 --- a/include/dt-bindings/reset-controller/stih407-resets.h +++ b/include/dt-bindings/reset/stih407-resets.h diff --git a/include/dt-bindings/reset-controller/stih415-resets.h b/include/dt-bindings/reset/stih415-resets.h index c2329fe..c2329fe 100644 --- a/include/dt-bindings/reset-controller/stih415-resets.h +++ b/include/dt-bindings/reset/stih415-resets.h diff --git a/include/dt-bindings/reset-controller/stih416-resets.h b/include/dt-bindings/reset/stih416-resets.h index fcf9af1..fcf9af1 100644 --- a/include/dt-bindings/reset-controller/stih416-resets.h +++ b/include/dt-bindings/reset/stih416-resets.h diff --git a/include/linux/clk/shmobile.h b/include/linux/clk/shmobile.h index 63a8159..cb19cc1 100644 --- a/include/linux/clk/shmobile.h +++ b/include/linux/clk/shmobile.h @@ -16,8 +16,20 @@ #include <linux/types.h> +struct device; +struct device_node; +struct generic_pm_domain; + void r8a7778_clocks_init(u32 mode); void r8a7779_clocks_init(u32 mode); void rcar_gen2_clocks_init(u32 mode); +#ifdef CONFIG_PM_GENERIC_DOMAINS_OF +void cpg_mstp_add_clk_domain(struct device_node *np); +int cpg_mstp_attach_dev(struct generic_pm_domain *domain, struct device *dev); +void cpg_mstp_detach_dev(struct generic_pm_domain *domain, struct device *dev); +#else +static inline void cpg_mstp_add_clk_domain(struct device_node *np) {} +#endif + #endif diff --git a/include/linux/soc/dove/pmu.h b/include/linux/soc/dove/pmu.h new file mode 100644 index 0000000..9c99f84 --- /dev/null +++ b/include/linux/soc/dove/pmu.h @@ -0,0 +1,6 @@ +#ifndef LINUX_SOC_DOVE_PMU_H +#define LINUX_SOC_DOVE_PMU_H + +int dove_init_pmu(void); + +#endif diff --git a/include/linux/soc/qcom/smd-rpm.h b/include/linux/soc/qcom/smd-rpm.h new file mode 100644 index 0000000..2a53dca --- /dev/null +++ b/include/linux/soc/qcom/smd-rpm.h @@ -0,0 +1,35 @@ +#ifndef __QCOM_SMD_RPM_H__ +#define __QCOM_SMD_RPM_H__ + +struct qcom_smd_rpm; + +#define QCOM_SMD_RPM_ACTIVE_STATE 0 +#define QCOM_SMD_RPM_SLEEP_STATE 1 + +/* + * Constants used for addressing resources in the RPM. + */ +#define QCOM_SMD_RPM_BOOST 0x61747362 +#define QCOM_SMD_RPM_BUS_CLK 0x316b6c63 +#define QCOM_SMD_RPM_BUS_MASTER 0x73616d62 +#define QCOM_SMD_RPM_BUS_SLAVE 0x766c7362 +#define QCOM_SMD_RPM_CLK_BUF_A 0x616B6C63 +#define QCOM_SMD_RPM_LDOA 0x616f646c +#define QCOM_SMD_RPM_LDOB 0x626F646C +#define QCOM_SMD_RPM_MEM_CLK 0x326b6c63 +#define QCOM_SMD_RPM_MISC_CLK 0x306b6c63 +#define QCOM_SMD_RPM_NCPA 0x6170636E +#define QCOM_SMD_RPM_NCPB 0x6270636E +#define QCOM_SMD_RPM_OCMEM_PWR 0x706d636f +#define QCOM_SMD_RPM_QPIC_CLK 0x63697071 +#define QCOM_SMD_RPM_SMPA 0x61706d73 +#define QCOM_SMD_RPM_SMPB 0x62706d73 +#define QCOM_SMD_RPM_SPDM 0x63707362 +#define QCOM_SMD_RPM_VSA 0x00617376 + +int qcom_rpm_smd_write(struct qcom_smd_rpm *rpm, + int state, + u32 resource_type, u32 resource_id, + void *buf, size_t count); + +#endif diff --git a/include/linux/soc/qcom/smd.h b/include/linux/soc/qcom/smd.h new file mode 100644 index 0000000..d7e50aa --- /dev/null +++ b/include/linux/soc/qcom/smd.h @@ -0,0 +1,46 @@ +#ifndef __QCOM_SMD_H__ +#define __QCOM_SMD_H__ + +#include <linux/device.h> +#include <linux/mod_devicetable.h> + +struct qcom_smd; +struct qcom_smd_channel; +struct qcom_smd_lookup; + +/** + * struct qcom_smd_device - smd device struct + * @dev: the device struct + * @channel: handle to the smd channel for this device + */ +struct qcom_smd_device { + struct device dev; + struct qcom_smd_channel *channel; +}; + +/** + * struct qcom_smd_driver - smd driver struct + * @driver: underlying device driver + * @probe: invoked when the smd channel is found + * @remove: invoked when the smd channel is closed + * @callback: invoked when an inbound message is received on the channel, + * should return 0 on success or -EBUSY if the data cannot be + * consumed at this time + */ +struct qcom_smd_driver { + struct device_driver driver; + int (*probe)(struct qcom_smd_device *dev); + void (*remove)(struct qcom_smd_device *dev); + int (*callback)(struct qcom_smd_device *, const void *, size_t); +}; + +int qcom_smd_driver_register(struct qcom_smd_driver *drv); +void qcom_smd_driver_unregister(struct qcom_smd_driver *drv); + +#define module_qcom_smd_driver(__smd_driver) \ + module_driver(__smd_driver, qcom_smd_driver_register, \ + qcom_smd_driver_unregister) + +int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len); + +#endif diff --git a/include/linux/soc/qcom/smem.h b/include/linux/soc/qcom/smem.h new file mode 100644 index 0000000..bc9630d --- /dev/null +++ b/include/linux/soc/qcom/smem.h @@ -0,0 +1,11 @@ +#ifndef __QCOM_SMEM_H__ +#define __QCOM_SMEM_H__ + +#define QCOM_SMEM_HOST_ANY -1 + +int qcom_smem_alloc(unsigned host, unsigned item, size_t size); +int qcom_smem_get(unsigned host, unsigned item, void **ptr, size_t *size); + +int qcom_smem_get_free_space(unsigned host); + +#endif diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h index b019e34..961b821 100644 --- a/include/soc/tegra/fuse.h +++ b/include/soc/tegra/fuse.h @@ -22,6 +22,7 @@ #define TEGRA114 0x35 #define TEGRA124 0x40 #define TEGRA132 0x13 +#define TEGRA210 0x21 #define TEGRA_FUSE_SKU_CALIB_0 0xf0 #define TEGRA30_FUSE_SATA_CALIB 0x124 @@ -47,10 +48,11 @@ struct tegra_sku_info { int cpu_speedo_id; int cpu_speedo_value; int cpu_iddq_value; - int core_process_id; + int soc_process_id; int soc_speedo_id; - int gpu_speedo_id; + int soc_speedo_value; int gpu_process_id; + int gpu_speedo_id; int gpu_speedo_value; enum tegra_revision revision; }; diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h index 1ab2813..370f2909 100644 --- a/include/soc/tegra/mc.h +++ b/include/soc/tegra/mc.h @@ -102,6 +102,8 @@ struct tegra_mc_soc { unsigned int num_address_bits; unsigned int atom_size; + u8 client_id_mask; + const struct tegra_smmu_soc *smmu; }; diff --git a/include/soc/tegra/pmc.h b/include/soc/tegra/pmc.h index f5c0de4..d18efe4 100644 --- a/include/soc/tegra/pmc.h +++ b/include/soc/tegra/pmc.h @@ -67,6 +67,11 @@ int tegra_pmc_cpu_remove_clamping(int cpuid); #define TEGRA_POWERGATE_XUSBC 22 #define TEGRA_POWERGATE_VIC 23 #define TEGRA_POWERGATE_IRAM 24 +#define TEGRA_POWERGATE_NVDEC 25 +#define TEGRA_POWERGATE_NVJPG 26 +#define TEGRA_POWERGATE_AUD 27 +#define TEGRA_POWERGATE_DFD 28 +#define TEGRA_POWERGATE_VE2 29 #define TEGRA_POWERGATE_3D0 TEGRA_POWERGATE_3D |
