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-rw-r--r--Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt36
-rw-r--r--Documentation/devicetree/bindings/fsi/fsi.txt5
-rw-r--r--drivers/fsi/Kconfig9
-rw-r--r--drivers/fsi/Makefile1
-rw-r--r--drivers/fsi/cf-fsi-fw.h157
-rw-r--r--drivers/fsi/fsi-core.c24
-rw-r--r--drivers/fsi/fsi-master-ast-cf.c1438
-rw-r--r--drivers/fsi/fsi-sbefifo.c13
-rw-r--r--drivers/gpio/gpio-aspeed.c426
-rw-r--r--include/linux/device.h4
-rw-r--r--include/linux/gpio/aspeed.h15
-rw-r--r--include/trace/events/fsi_master_ast_cf.h150
-rw-r--r--lib/devres.c36
13 files changed, 2252 insertions, 62 deletions
diff --git a/Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt b/Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt
new file mode 100644
index 0000000..3dc752d
--- /dev/null
+++ b/Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt
@@ -0,0 +1,36 @@
+Device-tree bindings for ColdFire offloaded gpio-based FSI master driver
+------------------------------------------------------------------------
+
+Required properties:
+ - compatible =
+ "aspeed,ast2400-cf-fsi-master" for an AST2400 based system
+ or
+ "aspeed,ast2500-cf-fsi-master" for an AST2500 based system
+
+ - clock-gpios = <gpio-descriptor>; : GPIO for FSI clock
+ - data-gpios = <gpio-descriptor>; : GPIO for FSI data signal
+ - enable-gpios = <gpio-descriptor>; : GPIO for enable signal
+ - trans-gpios = <gpio-descriptor>; : GPIO for voltage translator enable
+ - mux-gpios = <gpio-descriptor>; : GPIO for pin multiplexing with other
+ functions (eg, external FSI masters)
+ - memory-region = <phandle>; : Reference to the reserved memory for
+ the ColdFire. Must be 2M aligned on
+ AST2400 and 1M aligned on AST2500
+ - aspeed,sram = <phandle>; : Reference to the SRAM node.
+ - aspeed,cvic = <phandle>; : Reference to the CVIC node.
+
+Examples:
+
+ fsi-master {
+ compatible = "aspeed,ast2500-cf-fsi-master", "fsi-master";
+
+ clock-gpios = <&gpio 0>;
+ data-gpios = <&gpio 1>;
+ enable-gpios = <&gpio 2>;
+ trans-gpios = <&gpio 3>;
+ mux-gpios = <&gpio 4>;
+
+ memory-region = <&coldfire_memory>;
+ aspeed,sram = <&sram>;
+ aspeed,cvic = <&cvic>;
+ }
diff --git a/Documentation/devicetree/bindings/fsi/fsi.txt b/Documentation/devicetree/bindings/fsi/fsi.txt
index ab516c6..afb4ecc 100644
--- a/Documentation/devicetree/bindings/fsi/fsi.txt
+++ b/Documentation/devicetree/bindings/fsi/fsi.txt
@@ -83,6 +83,10 @@ addresses and sizes in the slave address space:
#address-cells = <1>;
#size-cells = <1>;
+Optionally, a slave can provide a global unique chip ID which is used to
+identify the physical location of the chip in a system specific way
+
+ chip-id = <0>;
FSI engines (devices)
---------------------
@@ -125,6 +129,7 @@ device tree if no extra platform information is required.
reg = <0 0>;
#address-cells = <1>;
#size-cells = <1>;
+ chip-id = <0>;
/* FSI engine at 0xc00, using a single page. In this example,
* it's an I2C master controller, so subnodes describe the
diff --git a/drivers/fsi/Kconfig b/drivers/fsi/Kconfig
index 9c08f46..8d82b1e 100644
--- a/drivers/fsi/Kconfig
+++ b/drivers/fsi/Kconfig
@@ -27,6 +27,15 @@ config FSI_MASTER_HUB
allow chaining of FSI links to an arbitrary depth. This allows for
a high target device fanout.
+config FSI_MASTER_AST_CF
+ tristate "FSI master based on Aspeed ColdFire coprocessor"
+ depends on GPIOLIB
+ depends on GPIO_ASPEED
+ ---help---
+ This option enables a FSI master using the AST2400 and AST2500 GPIO
+ lines driven by the internal ColdFire coprocessor. This requires
+ the corresponding machine specific ColdFire firmware to be available.
+
config FSI_SCOM
tristate "SCOM FSI client device driver"
---help---
diff --git a/drivers/fsi/Makefile b/drivers/fsi/Makefile
index 851182e..a50d6ce 100644
--- a/drivers/fsi/Makefile
+++ b/drivers/fsi/Makefile
@@ -2,5 +2,6 @@
obj-$(CONFIG_FSI) += fsi-core.o
obj-$(CONFIG_FSI_MASTER_HUB) += fsi-master-hub.o
obj-$(CONFIG_FSI_MASTER_GPIO) += fsi-master-gpio.o
+obj-$(CONFIG_FSI_MASTER_AST_CF) += fsi-master-ast-cf.o
obj-$(CONFIG_FSI_SCOM) += fsi-scom.o
obj-$(CONFIG_FSI_SBEFIFO) += fsi-sbefifo.o
diff --git a/drivers/fsi/cf-fsi-fw.h b/drivers/fsi/cf-fsi-fw.h
new file mode 100644
index 0000000..712df04
--- /dev/null
+++ b/drivers/fsi/cf-fsi-fw.h
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0+
+#ifndef __CF_FSI_FW_H
+#define __CF_FSI_FW_H
+
+/*
+ * uCode file layout
+ *
+ * 0000...03ff : m68k exception vectors
+ * 0400...04ff : Header info & boot config block
+ * 0500....... : Code & stack
+ */
+
+/*
+ * Header info & boot config area
+ *
+ * The Header info is built into the ucode and provide version and
+ * platform information.
+ *
+ * the Boot config needs to be adjusted by the ARM prior to starting
+ * the ucode if the Command/Status area isn't at 0x320000 in CF space
+ * (ie. beginning of SRAM).
+ */
+
+#define HDR_OFFSET 0x400
+
+/* Info: Signature & version */
+#define HDR_SYS_SIG 0x00 /* 2 bytes system signature */
+#define SYS_SIG_SHARED 0x5348
+#define SYS_SIG_SPLIT 0x5350
+#define HDR_FW_VERS 0x02 /* 2 bytes Major.Minor */
+#define HDR_API_VERS 0x04 /* 2 bytes Major.Minor */
+#define API_VERSION_MAJ 2 /* Current version */
+#define API_VERSION_MIN 1
+#define HDR_FW_OPTIONS 0x08 /* 4 bytes option flags */
+#define FW_OPTION_TRACE_EN 0x00000001 /* FW tracing enabled */
+#define FW_OPTION_CONT_CLOCK 0x00000002 /* Continuous clocking supported */
+#define HDR_FW_SIZE 0x10 /* 4 bytes size for combo image */
+
+/* Boot Config: Address of Command/Status area */
+#define HDR_CMD_STAT_AREA 0x80 /* 4 bytes CF address */
+#define HDR_FW_CONTROL 0x84 /* 4 bytes control flags */
+#define FW_CONTROL_CONT_CLOCK 0x00000002 /* Continuous clocking enabled */
+#define FW_CONTROL_DUMMY_RD 0x00000004 /* Extra dummy read (AST2400) */
+#define FW_CONTROL_USE_STOP 0x00000008 /* Use STOP instructions */
+#define HDR_CLOCK_GPIO_VADDR 0x90 /* 2 bytes offset from GPIO base */
+#define HDR_CLOCK_GPIO_DADDR 0x92 /* 2 bytes offset from GPIO base */
+#define HDR_DATA_GPIO_VADDR 0x94 /* 2 bytes offset from GPIO base */
+#define HDR_DATA_GPIO_DADDR 0x96 /* 2 bytes offset from GPIO base */
+#define HDR_TRANS_GPIO_VADDR 0x98 /* 2 bytes offset from GPIO base */
+#define HDR_TRANS_GPIO_DADDR 0x9a /* 2 bytes offset from GPIO base */
+#define HDR_CLOCK_GPIO_BIT 0x9c /* 1 byte bit number */
+#define HDR_DATA_GPIO_BIT 0x9d /* 1 byte bit number */
+#define HDR_TRANS_GPIO_BIT 0x9e /* 1 byte bit number */
+
+/*
+ * Command/Status area layout: Main part
+ */
+
+/* Command/Status register:
+ *
+ * +---------------------------+
+ * | STAT | RLEN | CLEN | CMD |
+ * | 8 | 8 | 8 | 8 |
+ * +---------------------------+
+ * | | | |
+ * status | | |
+ * Response len | |
+ * (in bits) | |
+ * | |
+ * Command len |
+ * (in bits) |
+ * |
+ * Command code
+ *
+ * Due to the big endian layout, that means that a byte read will
+ * return the status byte
+ */
+#define CMD_STAT_REG 0x00
+#define CMD_REG_CMD_MASK 0x000000ff
+#define CMD_REG_CMD_SHIFT 0
+#define CMD_NONE 0x00
+#define CMD_COMMAND 0x01
+#define CMD_BREAK 0x02
+#define CMD_IDLE_CLOCKS 0x03 /* clen = #clocks */
+#define CMD_INVALID 0xff
+#define CMD_REG_CLEN_MASK 0x0000ff00
+#define CMD_REG_CLEN_SHIFT 8
+#define CMD_REG_RLEN_MASK 0x00ff0000
+#define CMD_REG_RLEN_SHIFT 16
+#define CMD_REG_STAT_MASK 0xff000000
+#define CMD_REG_STAT_SHIFT 24
+#define STAT_WORKING 0x00
+#define STAT_COMPLETE 0x01
+#define STAT_ERR_INVAL_CMD 0x80
+#define STAT_ERR_INVAL_IRQ 0x81
+#define STAT_ERR_MTOE 0x82
+
+/* Response tag & CRC */
+#define STAT_RTAG 0x04
+
+/* Response CRC */
+#define STAT_RCRC 0x05
+
+/* Echo and Send delay */
+#define ECHO_DLY_REG 0x08
+#define SEND_DLY_REG 0x09
+
+/* Command data area
+ *
+ * Last byte of message must be left aligned
+ */
+#define CMD_DATA 0x10 /* 64 bit of data */
+
+/* Response data area, right aligned, unused top bits are 1 */
+#define RSP_DATA 0x20 /* 32 bit of data */
+
+/* Misc */
+#define INT_CNT 0x30 /* 32-bit interrupt count */
+#define BAD_INT_VEC 0x34 /* 32-bit bad interrupt vector # */
+#define CF_STARTED 0x38 /* byte, set to -1 when copro started */
+#define CLK_CNT 0x3c /* 32-bit, clock count (debug only) */
+
+/*
+ * SRAM layout: GPIO arbitration part
+ */
+#define ARB_REG 0x40
+#define ARB_ARM_REQ 0x01
+#define ARB_ARM_ACK 0x02
+
+/* Misc2 */
+#define CF_RESET_D0 0x50
+#define CF_RESET_D1 0x54
+#define BAD_INT_S0 0x58
+#define BAD_INT_S1 0x5c
+#define STOP_CNT 0x60
+
+/* Internal */
+
+/*
+ * SRAM layout: Trace buffer (debug builds only)
+ */
+#define TRACEBUF 0x100
+#define TR_CLKOBIT0 0xc0
+#define TR_CLKOBIT1 0xc1
+#define TR_CLKOSTART 0x82
+#define TR_OLEN 0x83 /* + len */
+#define TR_CLKZ 0x84 /* + count */
+#define TR_CLKWSTART 0x85
+#define TR_CLKTAG 0x86 /* + tag */
+#define TR_CLKDATA 0x87 /* + len */
+#define TR_CLKCRC 0x88 /* + raw crc */
+#define TR_CLKIBIT0 0x90
+#define TR_CLKIBIT1 0x91
+#define TR_END 0xff
+
+#endif /* __CF_FSI_FW_H */
+
diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index e9f8813..eab6c5c 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -80,6 +80,7 @@ struct fsi_slave {
struct fsi_master *master;
int id;
int link;
+ int chip_id;
uint32_t size; /* size of slave address space */
u8 t_send_delay;
u8 t_echo_delay;
@@ -717,6 +718,17 @@ static ssize_t slave_send_echo_store(struct device *dev,
static DEVICE_ATTR(send_echo_delays, 0600,
slave_send_echo_show, slave_send_echo_store);
+static ssize_t chip_id_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct fsi_slave *slave = to_fsi_slave(dev);
+
+ return sprintf(buf, "%d\n", slave->chip_id);
+}
+
+static DEVICE_ATTR_RO(chip_id);
+
static int fsi_slave_init(struct fsi_master *master, int link, uint8_t id)
{
uint32_t chip_id;
@@ -780,6 +792,14 @@ static int fsi_slave_init(struct fsi_master *master, int link, uint8_t id)
slave->t_send_delay = 16;
slave->t_echo_delay = 16;
+ /* Get chip ID if any */
+ slave->chip_id = -1;
+ if (slave->dev.of_node) {
+ uint32_t prop;
+ if (!of_property_read_u32(slave->dev.of_node, "chip-id", &prop))
+ slave->chip_id = prop;
+
+ }
rc = fsi_slave_set_smode(slave);
if (rc) {
dev_warn(&master->dev,
@@ -814,6 +834,10 @@ static int fsi_slave_init(struct fsi_master *master, int link, uint8_t id)
if (rc)
dev_warn(&slave->dev, "failed to create delay attr: %d\n", rc);
+ rc = device_create_file(&slave->dev, &dev_attr_chip_id);
+ if (rc)
+ dev_warn(&slave->dev, "failed to create chip id: %d\n", rc);
+
rc = fsi_slave_scan(slave);
if (rc)
dev_dbg(&master->dev, "failed during slave scan with: %d\n",
diff --git a/drivers/fsi/fsi-master-ast-cf.c b/drivers/fsi/fsi-master-ast-cf.c
new file mode 100644
index 0000000..57afaae
--- /dev/null
+++ b/drivers/fsi/fsi-master-ast-cf.c
@@ -0,0 +1,1438 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright 2018 IBM Corp
+/*
+ * A FSI master controller, using a simple GPIO bit-banging interface
+ */
+
+#include <linux/crc4.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/fsi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/io.h>
+#include <linux/irqflags.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/firmware.h>
+#include <linux/gpio/aspeed.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
+#include <linux/genalloc.h>
+
+#include "fsi-master.h"
+#include "cf-fsi-fw.h"
+
+#define FW_FILE_NAME "cf-fsi-fw.bin"
+
+/* Common SCU based coprocessor control registers */
+#define SCU_COPRO_CTRL 0x100
+#define SCU_COPRO_RESET 0x00000002
+#define SCU_COPRO_CLK_EN 0x00000001
+
+/* AST2500 specific ones */
+#define SCU_2500_COPRO_SEG0 0x104
+#define SCU_2500_COPRO_SEG1 0x108
+#define SCU_2500_COPRO_SEG2 0x10c
+#define SCU_2500_COPRO_SEG3 0x110
+#define SCU_2500_COPRO_SEG4 0x114
+#define SCU_2500_COPRO_SEG5 0x118
+#define SCU_2500_COPRO_SEG6 0x11c
+#define SCU_2500_COPRO_SEG7 0x120
+#define SCU_2500_COPRO_SEG8 0x124
+#define SCU_2500_COPRO_SEG_SWAP 0x00000001
+#define SCU_2500_COPRO_CACHE_CTL 0x128
+#define SCU_2500_COPRO_CACHE_EN 0x00000001
+#define SCU_2500_COPRO_SEG0_CACHE_EN 0x00000002
+#define SCU_2500_COPRO_SEG1_CACHE_EN 0x00000004
+#define SCU_2500_COPRO_SEG2_CACHE_EN 0x00000008
+#define SCU_2500_COPRO_SEG3_CACHE_EN 0x00000010
+#define SCU_2500_COPRO_SEG4_CACHE_EN 0x00000020
+#define SCU_2500_COPRO_SEG5_CACHE_EN 0x00000040
+#define SCU_2500_COPRO_SEG6_CACHE_EN 0x00000080
+#define SCU_2500_COPRO_SEG7_CACHE_EN 0x00000100
+#define SCU_2500_COPRO_SEG8_CACHE_EN 0x00000200
+
+#define SCU_2400_COPRO_SEG0 0x104
+#define SCU_2400_COPRO_SEG2 0x108
+#define SCU_2400_COPRO_SEG4 0x10c
+#define SCU_2400_COPRO_SEG6 0x110
+#define SCU_2400_COPRO_SEG8 0x114
+#define SCU_2400_COPRO_SEG_SWAP 0x80000000
+#define SCU_2400_COPRO_CACHE_CTL 0x118
+#define SCU_2400_COPRO_CACHE_EN 0x00000001
+#define SCU_2400_COPRO_SEG0_CACHE_EN 0x00000002
+#define SCU_2400_COPRO_SEG2_CACHE_EN 0x00000004
+#define SCU_2400_COPRO_SEG4_CACHE_EN 0x00000008
+#define SCU_2400_COPRO_SEG6_CACHE_EN 0x00000010
+#define SCU_2400_COPRO_SEG8_CACHE_EN 0x00000020
+
+/* CVIC registers */
+#define CVIC_EN_REG 0x10
+#define CVIC_TRIG_REG 0x18
+
+/*
+ * System register base address (needed for configuring the
+ * coldfire maps)
+ */
+#define SYSREG_BASE 0x1e600000
+
+/* Amount of SRAM required */
+#define SRAM_SIZE 0x1000
+
+#define LAST_ADDR_INVALID 0x1
+
+struct fsi_master_acf {
+ struct fsi_master master;
+ struct device *dev;
+ struct regmap *scu;
+ struct mutex lock; /* mutex for command ordering */
+ struct gpio_desc *gpio_clk;
+ struct gpio_desc *gpio_data;
+ struct gpio_desc *gpio_trans; /* Voltage translator */
+ struct gpio_desc *gpio_enable; /* FSI enable */
+ struct gpio_desc *gpio_mux; /* Mux control */
+ uint16_t gpio_clk_vreg;
+ uint16_t gpio_clk_dreg;
+ uint16_t gpio_dat_vreg;
+ uint16_t gpio_dat_dreg;
+ uint16_t gpio_tra_vreg;
+ uint16_t gpio_tra_dreg;
+ uint8_t gpio_clk_bit;
+ uint8_t gpio_dat_bit;
+ uint8_t gpio_tra_bit;
+ uint32_t cf_mem_addr;
+ size_t cf_mem_size;
+ void __iomem *cf_mem;
+ void __iomem *cvic;
+ struct gen_pool *sram_pool;
+ void __iomem *sram;
+ bool is_ast2500;
+ bool external_mode;
+ bool trace_enabled;
+ uint32_t last_addr;
+ uint8_t t_send_delay;
+ uint8_t t_echo_delay;
+ uint32_t cvic_sw_irq;
+};
+#define to_fsi_master_acf(m) container_of(m, struct fsi_master_acf, master)
+
+struct fsi_msg {
+ uint64_t msg;
+ uint8_t bits;
+};
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/fsi_master_ast_cf.h>
+
+static void msg_push_bits(struct fsi_msg *msg, uint64_t data, int bits)
+{
+ msg->msg <<= bits;
+ msg->msg |= data & ((1ull << bits) - 1);
+ msg->bits += bits;
+}
+
+static void msg_push_crc(struct fsi_msg *msg)
+{
+ uint8_t crc;
+ int top;
+
+ top = msg->bits & 0x3;
+
+ /* start bit, and any non-aligned top bits */
+ crc = crc4(0, 1 << top | msg->msg >> (msg->bits - top), top + 1);
+
+ /* aligned bits */
+ crc = crc4(crc, msg->msg, msg->bits - top);
+
+ msg_push_bits(msg, crc, 4);
+}
+
+static void msg_finish_cmd(struct fsi_msg *cmd)
+{
+ /* Left align message */
+ cmd->msg <<= (64 - cmd->bits);
+}
+
+static bool check_same_address(struct fsi_master_acf *master, int id,
+ uint32_t addr)
+{
+ /* this will also handle LAST_ADDR_INVALID */
+ return master->last_addr == (((id & 0x3) << 21) | (addr & ~0x3));
+}
+
+static bool check_relative_address(struct fsi_master_acf *master, int id,
+ uint32_t addr, uint32_t *rel_addrp)
+{
+ uint32_t last_addr = master->last_addr;
+ int32_t rel_addr;
+
+ if (last_addr == LAST_ADDR_INVALID)
+ return false;
+
+ /* We may be in 23-bit addressing mode, which uses the id as the
+ * top two address bits. So, if we're referencing a different ID,
+ * use absolute addresses.
+ */
+ if (((last_addr >> 21) & 0x3) != id)
+ return false;
+
+ /* remove the top two bits from any 23-bit addressing */
+ last_addr &= (1 << 21) - 1;
+
+ /* We know that the addresses are limited to 21 bits, so this won't
+ * overflow the signed rel_addr */
+ rel_addr = addr - last_addr;
+ if (rel_addr > 255 || rel_addr < -256)
+ return false;
+
+ *rel_addrp = (uint32_t)rel_addr;
+
+ return true;
+}
+
+static void last_address_update(struct fsi_master_acf *master,
+ int id, bool valid, uint32_t addr)
+{
+ if (!valid)
+ master->last_addr = LAST_ADDR_INVALID;
+ else
+ master->last_addr = ((id & 0x3) << 21) | (addr & ~0x3);
+}
+
+/*
+ * Encode an Absolute/Relative/Same Address command
+ */
+static void build_ar_command(struct fsi_master_acf *master,
+ struct fsi_msg *cmd, uint8_t id,
+ uint32_t addr, size_t size,
+ const void *data)
+{
+ int i, addr_bits, opcode_bits;
+ bool write = !!data;
+ uint8_t ds, opcode;
+ uint32_t rel_addr;
+
+ cmd->bits = 0;
+ cmd->msg = 0;
+
+ /* we have 21 bits of address max */
+ addr &= ((1 << 21) - 1);
+
+ /* cmd opcodes are variable length - SAME_AR is only two bits */
+ opcode_bits = 3;
+
+ if (check_same_address(master, id, addr)) {
+ /* we still address the byte offset within the word */
+ addr_bits = 2;
+ opcode_bits = 2;
+ opcode = FSI_CMD_SAME_AR;
+ trace_fsi_master_acf_cmd_same_addr(master);
+
+ } else if (check_relative_address(master, id, addr, &rel_addr)) {
+ /* 8 bits plus sign */
+ addr_bits = 9;
+ addr = rel_addr;
+ opcode = FSI_CMD_REL_AR;
+ trace_fsi_master_acf_cmd_rel_addr(master, rel_addr);
+
+ } else {
+ addr_bits = 21;
+ opcode = FSI_CMD_ABS_AR;
+ trace_fsi_master_acf_cmd_abs_addr(master, addr);
+ }
+
+ /*
+ * The read/write size is encoded in the lower bits of the address
+ * (as it must be naturally-aligned), and the following ds bit.
+ *
+ * size addr:1 addr:0 ds
+ * 1 x x 0
+ * 2 x 0 1
+ * 4 0 1 1
+ *
+ */
+ ds = size > 1 ? 1 : 0;
+ addr &= ~(size - 1);
+ if (size == 4)
+ addr |= 1;
+
+ msg_push_bits(cmd, id, 2);
+ msg_push_bits(cmd, opcode, opcode_bits);
+ msg_push_bits(cmd, write ? 0 : 1, 1);
+ msg_push_bits(cmd, addr, addr_bits);
+ msg_push_bits(cmd, ds, 1);
+ for (i = 0; write && i < size; i++)
+ msg_push_bits(cmd, ((uint8_t *)data)[i], 8);
+
+ msg_push_crc(cmd);
+ msg_finish_cmd(cmd);
+}
+
+static void build_dpoll_command(struct fsi_msg *cmd, uint8_t slave_id)
+{
+ cmd->bits = 0;
+ cmd->msg = 0;
+
+ msg_push_bits(cmd, slave_id, 2);
+ msg_push_bits(cmd, FSI_CMD_DPOLL, 3);
+ msg_push_crc(cmd);
+ msg_finish_cmd(cmd);
+}
+
+static void build_epoll_command(struct fsi_msg *cmd, uint8_t slave_id)
+{
+ cmd->bits = 0;
+ cmd->msg = 0;
+
+ msg_push_bits(cmd, slave_id, 2);
+ msg_push_bits(cmd, FSI_CMD_EPOLL, 3);
+ msg_push_crc(cmd);
+ msg_finish_cmd(cmd);
+}
+
+static void build_term_command(struct fsi_msg *cmd, uint8_t slave_id)
+{
+ cmd->bits = 0;
+ cmd->msg = 0;
+
+ msg_push_bits(cmd, slave_id, 2);
+ msg_push_bits(cmd, FSI_CMD_TERM, 6);
+ msg_push_crc(cmd);
+ msg_finish_cmd(cmd);
+}
+
+static int do_copro_command(struct fsi_master_acf *master, uint32_t op)
+{
+ uint32_t timeout = 10000000;
+ uint8_t stat;
+
+ trace_fsi_master_acf_copro_command(master, op);
+
+ /* Send command */
+ iowrite32be(op, master->sram + CMD_STAT_REG);
+
+ /* Ring doorbell if any */
+ if (master->cvic)
+ iowrite32(0x2, master->cvic + CVIC_TRIG_REG);
+
+ /* Wait for status to indicate completion (or error) */
+ do {
+ if (timeout-- == 0) {
+ dev_warn(master->dev,
+ "Timeout waiting for coprocessor completion\n");
+ return -ETIMEDOUT;
+ }
+ stat = ioread8(master->sram + CMD_STAT_REG);
+ } while(stat < STAT_COMPLETE || stat == 0xff);
+
+ if (stat == STAT_COMPLETE)
+ return 0;
+ switch(stat) {
+ case STAT_ERR_INVAL_CMD:
+ return -EINVAL;
+ case STAT_ERR_INVAL_IRQ:
+ return -EIO;
+ case STAT_ERR_MTOE:
+ return -ESHUTDOWN;
+ }
+ return -ENXIO;
+}
+
+static int clock_zeros(struct fsi_master_acf *master, int count)
+{
+ while (count) {
+ int rc, lcnt = min(count, 255);
+
+ rc = do_copro_command(master,
+ CMD_IDLE_CLOCKS | (lcnt << CMD_REG_CLEN_SHIFT));
+ if (rc)
+ return rc;
+ count -= lcnt;
+ }
+ return 0;
+}
+
+static int send_request(struct fsi_master_acf *master, struct fsi_msg *cmd,
+ unsigned int resp_bits)
+{
+ uint32_t op;
+
+ trace_fsi_master_acf_send_request(master, cmd, resp_bits);
+
+ /* Store message into SRAM */
+ iowrite32be((cmd->msg >> 32), master->sram + CMD_DATA);
+ iowrite32be((cmd->msg & 0xffffffff), master->sram + CMD_DATA + 4);
+
+ op = CMD_COMMAND;
+ op |= cmd->bits << CMD_REG_CLEN_SHIFT;
+ if (resp_bits)
+ op |= resp_bits << CMD_REG_RLEN_SHIFT;
+
+ return do_copro_command(master, op);
+}
+
+static int read_copro_response(struct fsi_master_acf *master, uint8_t size,
+ uint32_t *response, u8 *tag)
+{
+ uint8_t rtag = ioread8(master->sram + STAT_RTAG);
+ uint8_t rcrc = ioread8(master->sram + STAT_RCRC);
+ uint32_t rdata = 0;
+ uint32_t crc;
+ uint8_t ack;
+
+ *tag = ack = rtag & 3;
+
+ /* we have a whole message now; check CRC */
+ crc = crc4(0, 1, 1);
+ crc = crc4(crc, rtag, 4);
+ if (ack == FSI_RESP_ACK && size) {
+ rdata = ioread32be(master->sram + RSP_DATA);
+ crc = crc4(crc, rdata, size);
+ if (response)
+ *response = rdata;
+ }
+ crc = crc4(crc, rcrc, 4);
+
+ trace_fsi_master_acf_copro_response(master, rtag, rcrc, rdata, crc == 0);
+
+ if (crc) {
+ /*
+ * Check if it's all 1's or all 0's, that probably means
+ * the host is off
+ */
+ if ((rtag == 0xf && rcrc == 0xf) || (rtag == 0 && rcrc == 0))
+ return -ENODEV;
+ dev_dbg(master->dev, "Bad response CRC !\n");
+ return -EAGAIN;
+ }
+ return 0;
+}
+
+static int send_term(struct fsi_master_acf *master, uint8_t slave)
+{
+ struct fsi_msg cmd;
+ uint8_t tag;
+ int rc;
+
+ build_term_command(&cmd, slave);
+
+ rc = send_request(master, &cmd, 0);
+ if (rc) {
+ dev_warn(master->dev, "Error %d sending term\n", rc);
+ return rc;
+ }
+
+ rc = read_copro_response(master, 0, NULL, &tag);
+ if (rc < 0) {
+ dev_err(master->dev,
+ "TERM failed; lost communication with slave\n");
+ return -EIO;
+ } else if (tag != FSI_RESP_ACK) {
+ dev_err(master->dev, "TERM failed; response %d\n", tag);
+ return -EIO;
+ }
+ return 0;
+}
+
+static void dump_trace(struct fsi_master_acf *master)
+{
+ char trbuf[52];
+ char *p;
+ int i;
+
+ dev_dbg(master->dev,
+ "CMDSTAT:%08x RTAG=%02x RCRC=%02x RDATA=%02x #INT=%08x\n",
+ ioread32be(master->sram + CMD_STAT_REG),
+ ioread8(master->sram + STAT_RTAG),
+ ioread8(master->sram + STAT_RCRC),
+ ioread32be(master->sram + RSP_DATA),
+ ioread32be(master->sram + INT_CNT));
+
+ for (i = 0; i < 512; i++) {
+ uint8_t v;
+ if ((i % 16) == 0)
+ p = trbuf;
+ v = ioread8(master->sram + TRACEBUF + i);
+ p += sprintf(p, "%02x ", v);
+ if (((i % 16) == 15) || v == TR_END)
+ dev_dbg(master->dev, "%s\n", trbuf);
+ if (v == TR_END)
+ break;
+ }
+}
+
+static int handle_response(struct fsi_master_acf *master,
+ uint8_t slave, uint8_t size, void *data)
+{
+ int busy_count = 0, rc;
+ int crc_err_retries = 0;
+ struct fsi_msg cmd;
+ uint32_t response;
+ uint8_t tag;
+retry:
+ rc = read_copro_response(master, size, &response, &tag);
+
+ /* Handle retries on CRC errors */
+ if (rc == -EAGAIN) {
+ /* Too many retries ? */
+ if (crc_err_retries++ > FSI_CRC_ERR_RETRIES) {
+ /*
+ * Pass it up as a -EIO otherwise upper level will retry
+ * the whole command which isn't what we want here.
+ */
+ rc = -EIO;
+ goto bail;
+ }
+ trace_fsi_master_acf_crc_rsp_error(master, crc_err_retries);
+ if (master->trace_enabled)
+ dump_trace(master);
+ rc = clock_zeros(master, FSI_MASTER_EPOLL_CLOCKS);
+ if (rc) {
+ dev_warn(master->dev,
+ "Error %d clocking zeros for E_POLL\n", rc);
+ return rc;
+ }
+ build_epoll_command(&cmd, slave);
+ rc = send_request(master, &cmd, size);
+ if (rc) {
+ dev_warn(master->dev, "Error %d sending E_POLL\n", rc);
+ return -EIO;
+ }
+ goto retry;
+ }
+ if (rc)
+ return rc;
+
+ switch (tag) {
+ case FSI_RESP_ACK:
+ if (size && data) {
+ if (size == 32)
+ *(__be32 *)data = cpu_to_be32(response);
+ else if (size == 16)
+ *(__be16 *)data = cpu_to_be16(response);
+ else
+ *(u8 *)data = response;
+ }
+ break;
+ case FSI_RESP_BUSY:
+ /*
+ * Its necessary to clock slave before issuing
+ * d-poll, not indicated in the hardware protocol
+ * spec. < 20 clocks causes slave to hang, 21 ok.
+ */
+ dev_dbg(master->dev, "Busy, retrying...\n");
+ if (master->trace_enabled)
+ dump_trace(master);
+ rc = clock_zeros(master, FSI_MASTER_DPOLL_CLOCKS);
+ if (rc) {
+ dev_warn(master->dev,
+ "Error %d clocking zeros for D_POLL\n", rc);
+ break;
+ }
+ if (busy_count++ < FSI_MASTER_MAX_BUSY) {
+ build_dpoll_command(&cmd, slave);
+ rc = send_request(master, &cmd, size);
+ if (rc) {
+ dev_warn(master->dev, "Error %d sending D_POLL\n", rc);
+ break;
+ }
+ goto retry;
+ }
+ dev_dbg(master->dev,
+ "ERR slave is stuck in busy state, issuing TERM\n");
+ send_term(master, slave);
+ rc = -EIO;
+ break;
+
+ case FSI_RESP_ERRA:
+ dev_dbg(master->dev, "ERRA received\n");
+ if (master->trace_enabled)
+ dump_trace(master);
+ rc = -EIO;
+ break;
+ case FSI_RESP_ERRC:
+ dev_dbg(master->dev, "ERRC received\n");
+ if (master->trace_enabled)
+ dump_trace(master);
+ rc = -EAGAIN;
+ break;
+ }
+ bail:
+ if (busy_count > 0) {
+ trace_fsi_master_acf_poll_response_busy(master, busy_count);
+ }
+
+ return rc;
+}
+
+static int fsi_master_acf_xfer(struct fsi_master_acf *master, uint8_t slave,
+ struct fsi_msg *cmd, size_t resp_len, void *resp)
+{
+ int rc = -EAGAIN, retries = 0;
+
+ resp_len <<= 3;
+ while ((retries++) < FSI_CRC_ERR_RETRIES) {
+ rc = send_request(master, cmd, resp_len);
+ if (rc) {
+ if (rc != -ESHUTDOWN)
+ dev_warn(master->dev, "Error %d sending command\n", rc);
+ break;
+ }
+ rc = handle_response(master, slave, resp_len, resp);
+ if (rc != -EAGAIN)
+ break;
+ rc = -EIO;
+ dev_dbg(master->dev, "ECRC retry %d\n", retries);
+
+ /* Pace it a bit before retry */
+ msleep(1);
+ }
+
+ return rc;
+}
+
+static int fsi_master_acf_read(struct fsi_master *_master, int link,
+ uint8_t id, uint32_t addr, void *val,
+ size_t size)
+{
+ struct fsi_master_acf *master = to_fsi_master_acf(_master);
+ struct fsi_msg cmd;
+ int rc;
+
+ if (link != 0)
+ return -ENODEV;
+
+ mutex_lock(&master->lock);
+ dev_dbg(master->dev, "read id %d addr %x size %ud\n", id, addr, size);
+ build_ar_command(master, &cmd, id, addr, size, NULL);
+ rc = fsi_master_acf_xfer(master, id, &cmd, size, val);
+ last_address_update(master, id, rc == 0, addr);
+ if (rc)
+ dev_dbg(master->dev, "read id %d addr 0x%08x err: %d\n",
+ id, addr, rc);
+ mutex_unlock(&master->lock);
+
+ return rc;
+}
+
+static int fsi_master_acf_write(struct fsi_master *_master, int link,
+ uint8_t id, uint32_t addr, const void *val,
+ size_t size)
+{
+ struct fsi_master_acf *master = to_fsi_master_acf(_master);
+ struct fsi_msg cmd;
+ int rc;
+
+ if (link != 0)
+ return -ENODEV;
+
+ mutex_lock(&master->lock);
+ build_ar_command(master, &cmd, id, addr, size, val);
+ dev_dbg(master->dev, "write id %d addr %x size %ud raw_data: %08x\n",
+ id, addr, size, *(uint32_t *)val);
+ rc = fsi_master_acf_xfer(master, id, &cmd, 0, NULL);
+ last_address_update(master, id, rc == 0, addr);
+ if (rc)
+ dev_dbg(master->dev, "write id %d addr 0x%08x err: %d\n",
+ id, addr, rc);
+ mutex_unlock(&master->lock);
+
+ return rc;
+}
+
+static int fsi_master_acf_term(struct fsi_master *_master,
+ int link, uint8_t id)
+{
+ struct fsi_master_acf *master = to_fsi_master_acf(_master);
+ struct fsi_msg cmd;
+ int rc;
+
+ if (link != 0)
+ return -ENODEV;
+
+ mutex_lock(&master->lock);
+ build_term_command(&cmd, id);
+ dev_dbg(master->dev, "term id %d\n", id);
+ rc = fsi_master_acf_xfer(master, id, &cmd, 0, NULL);
+ last_address_update(master, id, false, 0);
+ mutex_unlock(&master->lock);
+
+ return rc;
+}
+
+static int fsi_master_acf_break(struct fsi_master *_master, int link)
+{
+ struct fsi_master_acf *master = to_fsi_master_acf(_master);
+ int rc;
+
+ if (link != 0)
+ return -ENODEV;
+
+ mutex_lock(&master->lock);
+ if (master->external_mode) {
+ mutex_unlock(&master->lock);
+ return -EBUSY;
+ }
+ dev_dbg(master->dev, "sending BREAK\n");
+ rc = do_copro_command(master, CMD_BREAK);
+ last_address_update(master, 0, false, 0);
+ mutex_unlock(&master->lock);
+
+ /* Wait for logic reset to take effect */
+ udelay(200);
+
+ return rc;
+}
+
+static void reset_cf(struct fsi_master_acf *master)
+{
+ regmap_write(master->scu, SCU_COPRO_CTRL, SCU_COPRO_RESET);
+ usleep_range(20,20);
+ regmap_write(master->scu, SCU_COPRO_CTRL, 0);
+ usleep_range(20,20);
+}
+
+static void start_cf(struct fsi_master_acf *master)
+{
+ regmap_write(master->scu, SCU_COPRO_CTRL, SCU_COPRO_CLK_EN);
+}
+
+static void setup_ast2500_cf_maps(struct fsi_master_acf *master)
+{
+ /*
+ * Note about byteswap setting: the bus is wired backwards,
+ * so setting the byteswap bit actually makes the ColdFire
+ * work "normally" for a BE processor, ie, put the MSB in
+ * the lowest address byte.
+ *
+ * We thus need to set the bit for our main memory which
+ * contains our program code. We create two mappings for
+ * the register, one with each setting.
+ *
+ * Segments 2 and 3 has a "swapped" mapping (BE)
+ * and 6 and 7 have a non-swapped mapping (LE) which allows
+ * us to avoid byteswapping register accesses since the
+ * registers are all LE.
+ */
+
+ /* Setup segment 0 to our memory region */
+ regmap_write(master->scu, SCU_2500_COPRO_SEG0, master->cf_mem_addr |
+ SCU_2500_COPRO_SEG_SWAP);
+
+ /* Segments 2 and 3 to sysregs with byteswap (for SRAM) */
+ regmap_write(master->scu, SCU_2500_COPRO_SEG2, SYSREG_BASE |
+ SCU_2500_COPRO_SEG_SWAP);
+ regmap_write(master->scu, SCU_2500_COPRO_SEG3, SYSREG_BASE | 0x100000 |
+ SCU_2500_COPRO_SEG_SWAP);
+
+ /* And segment 6 and 7 to sysregs no byteswap */
+ regmap_write(master->scu, SCU_2500_COPRO_SEG6, SYSREG_BASE);
+ regmap_write(master->scu, SCU_2500_COPRO_SEG7, SYSREG_BASE | 0x100000);
+
+ /* Memory cachable, regs and SRAM not cachable */
+ regmap_write(master->scu, SCU_2500_COPRO_CACHE_CTL,
+ SCU_2500_COPRO_SEG0_CACHE_EN | SCU_2500_COPRO_CACHE_EN);
+}
+
+static void setup_ast2400_cf_maps(struct fsi_master_acf *master)
+{
+ /* Setup segment 0 to our memory region */
+ regmap_write(master->scu, SCU_2400_COPRO_SEG0, master->cf_mem_addr |
+ SCU_2400_COPRO_SEG_SWAP);
+
+ /* Segments 2 to sysregs with byteswap (for SRAM) */
+ regmap_write(master->scu, SCU_2400_COPRO_SEG2, SYSREG_BASE |
+ SCU_2400_COPRO_SEG_SWAP);
+
+ /* And segment 6 to sysregs no byteswap */
+ regmap_write(master->scu, SCU_2400_COPRO_SEG6, SYSREG_BASE);
+
+ /* Memory cachable, regs and SRAM not cachable */
+ regmap_write(master->scu, SCU_2400_COPRO_CACHE_CTL,
+ SCU_2400_COPRO_SEG0_CACHE_EN | SCU_2400_COPRO_CACHE_EN);
+}
+
+static void setup_common_fw_config(struct fsi_master_acf *master,
+ void __iomem *base)
+{
+ iowrite16be(master->gpio_clk_vreg, base + HDR_CLOCK_GPIO_VADDR);
+ iowrite16be(master->gpio_clk_dreg, base + HDR_CLOCK_GPIO_DADDR);
+ iowrite16be(master->gpio_dat_vreg, base + HDR_DATA_GPIO_VADDR);
+ iowrite16be(master->gpio_dat_dreg, base + HDR_DATA_GPIO_DADDR);
+ iowrite16be(master->gpio_tra_vreg, base + HDR_TRANS_GPIO_VADDR);
+ iowrite16be(master->gpio_tra_dreg, base + HDR_TRANS_GPIO_DADDR);
+ iowrite8(master->gpio_clk_bit, base + HDR_CLOCK_GPIO_BIT);
+ iowrite8(master->gpio_dat_bit, base + HDR_DATA_GPIO_BIT);
+ iowrite8(master->gpio_tra_bit, base + HDR_TRANS_GPIO_BIT);
+}
+
+static void setup_ast2500_fw_config(struct fsi_master_acf *master)
+{
+ void __iomem *base = master->cf_mem + HDR_OFFSET;
+
+ setup_common_fw_config(master, base);
+ iowrite32be(FW_CONTROL_USE_STOP, base + HDR_FW_CONTROL);
+}
+
+static void setup_ast2400_fw_config(struct fsi_master_acf *master)
+{
+ void __iomem *base = master->cf_mem + HDR_OFFSET;
+
+ setup_common_fw_config(master, base);
+ iowrite32be(FW_CONTROL_CONT_CLOCK|FW_CONTROL_DUMMY_RD, base + HDR_FW_CONTROL);
+}
+
+static int setup_gpios_for_copro(struct fsi_master_acf *master)
+{
+
+ int rc;
+
+ /* This aren't under ColdFire control, just set them up appropriately */
+ gpiod_direction_output(master->gpio_mux, 1);
+ gpiod_direction_output(master->gpio_enable, 1);
+
+ /* Those are under ColdFire control, let it configure them */
+ rc = aspeed_gpio_copro_grab_gpio(master->gpio_clk, &master->gpio_clk_vreg,
+ &master->gpio_clk_dreg, &master->gpio_clk_bit);
+ if (rc) {
+ dev_err(master->dev, "failed to assign clock gpio to coprocessor\n");
+ return rc;
+ }
+ rc = aspeed_gpio_copro_grab_gpio(master->gpio_data, &master->gpio_dat_vreg,
+ &master->gpio_dat_dreg, &master->gpio_dat_bit);
+ if (rc) {
+ dev_err(master->dev, "failed to assign data gpio to coprocessor\n");
+ aspeed_gpio_copro_release_gpio(master->gpio_clk);
+ return rc;
+ }
+ rc = aspeed_gpio_copro_grab_gpio(master->gpio_trans, &master->gpio_tra_vreg,
+ &master->gpio_tra_dreg, &master->gpio_tra_bit);
+ if (rc) {
+ dev_err(master->dev, "failed to assign trans gpio to coprocessor\n");
+ aspeed_gpio_copro_release_gpio(master->gpio_clk);
+ aspeed_gpio_copro_release_gpio(master->gpio_data);
+ return rc;
+ }
+ return 0;
+}
+
+static void release_copro_gpios(struct fsi_master_acf *master)
+{
+ aspeed_gpio_copro_release_gpio(master->gpio_clk);
+ aspeed_gpio_copro_release_gpio(master->gpio_data);
+ aspeed_gpio_copro_release_gpio(master->gpio_trans);
+}
+
+static int load_copro_firmware(struct fsi_master_acf *master)
+{
+ const struct firmware *fw;
+ uint16_t sig = 0, wanted_sig;
+ const u8 *data;
+ size_t size = 0;
+ int rc;
+
+ /* Get the binary */
+ rc = request_firmware(&fw, FW_FILE_NAME, master->dev);
+ if (rc) {
+ dev_err(
+ master->dev, "Error %d to load firwmare '%s' !\n",
+ rc, FW_FILE_NAME);
+ return rc;
+ }
+
+ /* Which image do we want ? (shared vs. split clock/data GPIOs) */
+ if (master->gpio_clk_vreg == master->gpio_dat_vreg)
+ wanted_sig = SYS_SIG_SHARED;
+ else
+ wanted_sig = SYS_SIG_SPLIT;
+ dev_dbg(master->dev, "Looking for image sig %04x\n", wanted_sig);
+
+ /* Try to find it */
+ for (data = fw->data; data < (fw->data + fw->size);) {
+ sig = be16_to_cpup((__be16 *)(data + HDR_OFFSET + HDR_SYS_SIG));
+ size = be32_to_cpup((__be32 *)(data + HDR_OFFSET + HDR_FW_SIZE));
+ if (sig == wanted_sig)
+ break;
+ data += size;
+ }
+ if (sig != wanted_sig) {
+ dev_err(master->dev, "Failed to locate image sig %04x in FW blob\n",
+ wanted_sig);
+ return -ENODEV;
+ }
+ if (size > master->cf_mem_size) {
+ dev_err(master->dev, "FW size (%zd) bigger than memory reserve (%zd)\n",
+ fw->size, master->cf_mem_size);
+ rc = -ENOMEM;
+ } else {
+ memcpy_toio(master->cf_mem, data, size);
+ }
+ release_firmware(fw);
+
+ return rc;
+}
+
+static int check_firmware_image(struct fsi_master_acf *master)
+{
+ uint32_t fw_vers, fw_api, fw_options;
+
+ fw_vers = ioread16be(master->cf_mem + HDR_OFFSET + HDR_FW_VERS);
+ fw_api = ioread16be(master->cf_mem + HDR_OFFSET + HDR_API_VERS);
+ fw_options = ioread32be(master->cf_mem + HDR_OFFSET + HDR_FW_OPTIONS);
+ master->trace_enabled = !!(fw_options & FW_OPTION_TRACE_EN);
+
+ /* Check version and signature */
+ dev_info(master->dev, "ColdFire initialized, firmware v%d API v%d.%d (trace %s)\n",
+ fw_vers, fw_api >> 8, fw_api & 0xff,
+ master->trace_enabled ? "enabled" : "disabled");
+
+ if ((fw_api >> 8) != API_VERSION_MAJ) {
+ dev_err(master->dev, "Unsupported coprocessor API version !\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int copro_enable_sw_irq(struct fsi_master_acf *master)
+{
+ int timeout;
+ uint32_t val;
+
+ /*
+ * Enable coprocessor interrupt input. I've had problems getting the
+ * value to stick, so try in a loop
+ */
+ for (timeout = 0; timeout < 10; timeout++) {
+ iowrite32(0x2, master->cvic + CVIC_EN_REG);
+ val = ioread32(master->cvic + CVIC_EN_REG);
+ if (val & 2)
+ break;
+ msleep(1);
+ }
+ if (!(val & 2)) {
+ dev_err(master->dev, "Failed to enable coprocessor interrupt !\n");
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int fsi_master_acf_setup(struct fsi_master_acf *master)
+{
+ int timeout, rc;
+ uint32_t val;
+
+ /* Make sure the ColdFire is stopped */
+ reset_cf(master);
+
+ /*
+ * Clear SRAM. This needs to happen before we setup the GPIOs
+ * as we might start trying to arbitrate as soon as that happens.
+ */
+ memset_io(master->sram, 0, SRAM_SIZE);
+
+ /* Configure GPIOs */
+ rc = setup_gpios_for_copro(master);
+ if (rc)
+ return rc;
+
+ /* Load the firmware into the reserved memory */
+ rc = load_copro_firmware(master);
+ if (rc)
+ return rc;
+
+ /* Read signature and check versions */
+ rc = check_firmware_image(master);
+ if (rc)
+ return rc;
+
+ /* Setup coldfire memory map */
+ if (master->is_ast2500) {
+ setup_ast2500_cf_maps(master);
+ setup_ast2500_fw_config(master);
+ } else {
+ setup_ast2400_cf_maps(master);
+ setup_ast2400_fw_config(master);
+ }
+
+ /* Start the ColdFire */
+ start_cf(master);
+
+ /* Wait for status register to indicate command completion
+ * which signals the initialization is complete
+ */
+ for (timeout = 0; timeout < 10; timeout++) {
+ val = ioread8(master->sram + CF_STARTED);
+ if (val)
+ break;
+ msleep(1);
+ }
+ if (!val) {
+ dev_err(master->dev, "Coprocessor startup timeout !\n");
+ rc = -ENODEV;
+ goto err;
+ }
+
+ /* Configure echo & send delay */
+ iowrite8(master->t_send_delay, master->sram + SEND_DLY_REG);
+ iowrite8(master->t_echo_delay, master->sram + ECHO_DLY_REG);
+
+ /* Enable SW interrupt to copro if any */
+ if (master->cvic) {
+ rc = copro_enable_sw_irq(master);
+ if (rc)
+ goto err;
+ }
+ return 0;
+ err:
+ /* An error occurred, don't leave the coprocessor running */
+ reset_cf(master);
+
+ /* Release the GPIOs */
+ release_copro_gpios(master);
+
+ return rc;
+}
+
+
+static void fsi_master_acf_terminate(struct fsi_master_acf *master)
+{
+ unsigned long flags;
+
+ /*
+ * A GPIO arbitration requestion could come in while this is
+ * happening. To avoid problems, we disable interrupts so it
+ * cannot preempt us on this CPU
+ */
+
+ local_irq_save(flags);
+
+ /* Stop the coprocessor */
+ reset_cf(master);
+
+ /* We mark the copro not-started */
+ iowrite32(0, master->sram + CF_STARTED);
+
+ /* We mark the ARB register as having given up arbitration to
+ * deal with a potential race with the arbitration request
+ */
+ iowrite8(ARB_ARM_ACK, master->sram + ARB_REG);
+
+ local_irq_restore(flags);
+
+ /* Return the GPIOs to the ARM */
+ release_copro_gpios(master);
+}
+
+static void fsi_master_acf_setup_external(struct fsi_master_acf *master)
+{
+ /* Setup GPIOs for external FSI master (FSP box) */
+ gpiod_direction_output(master->gpio_mux, 0);
+ gpiod_direction_output(master->gpio_trans, 0);
+ gpiod_direction_output(master->gpio_enable, 1);
+ gpiod_direction_input(master->gpio_clk);
+ gpiod_direction_input(master->gpio_data);
+}
+
+static int fsi_master_acf_link_enable(struct fsi_master *_master, int link)
+{
+ struct fsi_master_acf *master = to_fsi_master_acf(_master);
+ int rc = -EBUSY;
+
+ if (link != 0)
+ return -ENODEV;
+
+ mutex_lock(&master->lock);
+ if (!master->external_mode) {
+ gpiod_set_value(master->gpio_enable, 1);
+ rc = 0;
+ }
+ mutex_unlock(&master->lock);
+
+ return rc;
+}
+
+static int fsi_master_acf_link_config(struct fsi_master *_master, int link,
+ u8 t_send_delay, u8 t_echo_delay)
+{
+ struct fsi_master_acf *master = to_fsi_master_acf(_master);
+
+ if (link != 0)
+ return -ENODEV;
+
+ mutex_lock(&master->lock);
+ master->t_send_delay = t_send_delay;
+ master->t_echo_delay = t_echo_delay;
+ dev_dbg(master->dev, "Changing delays: send=%d echo=%d\n",
+ t_send_delay, t_echo_delay);
+ iowrite8(master->t_send_delay, master->sram + SEND_DLY_REG);
+ iowrite8(master->t_echo_delay, master->sram + ECHO_DLY_REG);
+ mutex_unlock(&master->lock);
+
+ return 0;
+}
+
+static ssize_t external_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fsi_master_acf *master = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE - 1, "%u\n",
+ master->external_mode ? 1 : 0);
+}
+
+static ssize_t external_mode_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct fsi_master_acf *master = dev_get_drvdata(dev);
+ unsigned long val;
+ bool external_mode;
+ int err;
+
+ err = kstrtoul(buf, 0, &val);
+ if (err)
+ return err;
+
+ external_mode = !!val;
+
+ mutex_lock(&master->lock);
+
+ if (external_mode == master->external_mode) {
+ mutex_unlock(&master->lock);
+ return count;
+ }
+
+ master->external_mode = external_mode;
+ if (master->external_mode) {
+ fsi_master_acf_terminate(master);
+ fsi_master_acf_setup_external(master);
+ } else
+ fsi_master_acf_setup(master);
+
+ mutex_unlock(&master->lock);
+
+ fsi_master_rescan(&master->master);
+
+ return count;
+}
+
+static DEVICE_ATTR(external_mode, 0664,
+ external_mode_show, external_mode_store);
+
+static int fsi_master_acf_gpio_request(void *data)
+{
+ struct fsi_master_acf *master = data;
+ int timeout;
+ u8 val;
+
+ /* Note: This doesn't require holding out mutex */
+
+ /* Write reqest */
+ iowrite8(ARB_ARM_REQ, master->sram + ARB_REG);
+
+ /*
+ * There is a race (which does happen at boot time) when we get an
+ * arbitration request as we are either about to or just starting
+ * the coprocessor.
+ *
+ * To handle it, we first check if we are running. If not yet we
+ * check whether the copro is started in the SCU.
+ *
+ * If it's not started, we can basically just assume we have arbitration
+ * and return. Otherwise, we wait normally expecting for the arbitration
+ * to eventually complete.
+ */
+ if (ioread32(master->sram + CF_STARTED) == 0) {
+ unsigned int reg = 0;
+
+ regmap_read(master->scu, SCU_COPRO_CTRL, &reg);
+ if (!(reg & SCU_COPRO_CLK_EN))
+ return 0;
+ }
+
+ /* Ring doorbell if any */
+ if (master->cvic)
+ iowrite32(0x2, master->cvic + CVIC_TRIG_REG);
+
+ for (timeout = 0; timeout < 10000; timeout++) {
+ val = ioread8(master->sram + ARB_REG);
+ if (val != ARB_ARM_REQ)
+ break;
+ udelay(1);
+ }
+
+ /* If it failed, override anyway */
+ if (val != ARB_ARM_ACK)
+ dev_warn(master->dev, "GPIO request arbitration timeout\n");
+
+ return 0;
+}
+
+static int fsi_master_acf_gpio_release(void *data)
+{
+ struct fsi_master_acf *master = data;
+
+ /* Write release */
+ iowrite8(0, master->sram + ARB_REG);
+
+ /* Ring doorbell if any */
+ if (master->cvic)
+ iowrite32(0x2, master->cvic + CVIC_TRIG_REG);
+
+ return 0;
+}
+
+static void fsi_master_acf_release(struct device *dev)
+{
+ struct fsi_master_acf *master = to_fsi_master_acf(dev_to_fsi_master(dev));
+
+ /* Cleanup, stop coprocessor */
+ mutex_lock(&master->lock);
+ fsi_master_acf_terminate(master);
+ aspeed_gpio_copro_set_ops(NULL, NULL);
+ mutex_unlock(&master->lock);
+
+ /* Free resources */
+ gen_pool_free(master->sram_pool, (unsigned long)master->sram, SRAM_SIZE);
+ of_node_put(dev_of_node(master->dev));
+
+ kfree(master);
+}
+
+static const struct aspeed_gpio_copro_ops fsi_master_acf_gpio_ops = {
+ .request_access = fsi_master_acf_gpio_request,
+ .release_access = fsi_master_acf_gpio_release,
+};
+
+static int fsi_master_acf_probe(struct platform_device *pdev)
+{
+ struct device_node *np, *mnode = dev_of_node(&pdev->dev);
+ struct genpool_data_fixed gpdf;
+ struct fsi_master_acf *master;
+ struct gpio_desc *gpio;
+ struct resource res;
+ uint32_t cf_mem_align;
+ int rc;
+
+ master = kzalloc(sizeof(*master), GFP_KERNEL);
+ if (!master)
+ return -ENOMEM;
+
+ master->dev = &pdev->dev;
+ master->master.dev.parent = master->dev;
+ master->last_addr = LAST_ADDR_INVALID;
+
+ /* AST2400 vs. AST2500 */
+ master->is_ast2500 = of_device_is_compatible(mnode, "aspeed,ast2500-cf-fsi-master");
+
+ /* Grab the SCU, we'll need to access it to configure the coprocessor */
+ if (master->is_ast2500)
+ master->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2500-scu");
+ else
+ master->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2400-scu");
+ if (IS_ERR(master->scu)) {
+ dev_err(&pdev->dev, "failed to find SCU regmap\n");
+ rc = PTR_ERR(master->scu);
+ goto err_free;
+ }
+
+ /* Grab all the GPIOs we need */
+ gpio = devm_gpiod_get(&pdev->dev, "clock", 0);
+ if (IS_ERR(gpio)) {
+ dev_err(&pdev->dev, "failed to get clock gpio\n");
+ rc = PTR_ERR(gpio);
+ goto err_free;
+ }
+ master->gpio_clk = gpio;
+
+ gpio = devm_gpiod_get(&pdev->dev, "data", 0);
+ if (IS_ERR(gpio)) {
+ dev_err(&pdev->dev, "failed to get data gpio\n");
+ rc = PTR_ERR(gpio);
+ goto err_free;
+ }
+ master->gpio_data = gpio;
+
+ /* Optional GPIOs */
+ gpio = devm_gpiod_get_optional(&pdev->dev, "trans", 0);
+ if (IS_ERR(gpio)) {
+ dev_err(&pdev->dev, "failed to get trans gpio\n");
+ rc = PTR_ERR(gpio);
+ goto err_free;
+ }
+ master->gpio_trans = gpio;
+
+ gpio = devm_gpiod_get_optional(&pdev->dev, "enable", 0);
+ if (IS_ERR(gpio)) {
+ dev_err(&pdev->dev, "failed to get enable gpio\n");
+ rc = PTR_ERR(gpio);
+ goto err_free;
+ }
+ master->gpio_enable = gpio;
+
+ gpio = devm_gpiod_get_optional(&pdev->dev, "mux", 0);
+ if (IS_ERR(gpio)) {
+ dev_err(&pdev->dev, "failed to get mux gpio\n");
+ rc = PTR_ERR(gpio);
+ goto err_free;
+ }
+ master->gpio_mux = gpio;
+
+ /* Grab the reserved memory region (use DMA API instead ?) */
+ np = of_parse_phandle(mnode, "memory-region", 0);
+ if (!np) {
+ dev_err(&pdev->dev, "Didn't find reserved memory\n");
+ rc = -EINVAL;
+ goto err_free;
+ }
+ rc = of_address_to_resource(np, 0, &res);
+ of_node_put(np);
+ if (rc) {
+ dev_err(&pdev->dev, "Couldn't address to resource for reserved memory\n");
+ rc = -ENOMEM;
+ goto err_free;
+ }
+ master->cf_mem_size = resource_size(&res);
+ master->cf_mem_addr = (uint32_t)res.start;
+ cf_mem_align = master->is_ast2500 ? 0x00100000 : 0x00200000;
+ if (master->cf_mem_addr & (cf_mem_align - 1)) {
+ dev_err(&pdev->dev, "Reserved memory has insufficient alignment\n");
+ rc = -ENOMEM;
+ goto err_free;
+ }
+ master->cf_mem = devm_ioremap_resource(&pdev->dev, &res);
+ if (IS_ERR(master->cf_mem)) {
+ rc = PTR_ERR(master->cf_mem);
+ dev_err(&pdev->dev, "Error %d mapping coldfire memory\n", rc);
+ goto err_free;
+ }
+ dev_dbg(&pdev->dev, "DRAM allocation @%x\n", master->cf_mem_addr);
+
+ /* AST2500 has a SW interrupt to the coprocessor */
+ if (master->is_ast2500) {
+ /* Grab the CVIC (ColdFire interrupts controller) */
+ np = of_parse_phandle(mnode, "aspeed,cvic", 0);
+ if (!np) {
+ dev_err(&pdev->dev, "Didn't find CVIC\n");
+ rc = -EINVAL;
+ goto err_free;
+ }
+ master->cvic = devm_of_iomap(&pdev->dev, np, 0, NULL);
+ if (IS_ERR(master->cvic)) {
+ rc = PTR_ERR(master->cvic);
+ dev_err(&pdev->dev, "Error %d mapping CVIC\n", rc);
+ goto err_free;
+ }
+ rc = of_property_read_u32(np, "copro-sw-interrupts",
+ &master->cvic_sw_irq);
+ if (rc) {
+ dev_err(&pdev->dev, "Can't find coprocessor SW interrupt\n");
+ goto err_free;
+ }
+ }
+
+ /* Grab the SRAM */
+ master->sram_pool = of_gen_pool_get(dev_of_node(&pdev->dev), "aspeed,sram", 0);
+ if (!master->sram_pool) {
+ rc = -ENODEV;
+ dev_err(&pdev->dev, "Can't find sram pool\n");
+ goto err_free;
+ }
+
+ /* Current microcode only deals with fixed location in SRAM */
+ gpdf.offset = 0;
+ master->sram = (void __iomem *)gen_pool_alloc_algo(master->sram_pool, SRAM_SIZE,
+ gen_pool_fixed_alloc, &gpdf);
+ if (!master->sram) {
+ rc = -ENOMEM;
+ dev_err(&pdev->dev, "Failed to allocate sram from pool\n");
+ goto err_free;
+ }
+ dev_dbg(&pdev->dev, "SRAM allocation @%lx\n",
+ (unsigned long)gen_pool_virt_to_phys(master->sram_pool,
+ (unsigned long)master->sram));
+
+ /*
+ * Hookup with the GPIO driver for arbitration of GPIO banks
+ * ownership.
+ */
+ aspeed_gpio_copro_set_ops(&fsi_master_acf_gpio_ops, master);
+
+ /* Default FSI command delays */
+ master->t_send_delay = FSI_SEND_DELAY_CLOCKS;
+ master->t_echo_delay = FSI_ECHO_DELAY_CLOCKS;
+ master->master.n_links = 1;
+ if (master->is_ast2500)
+ master->master.flags = FSI_MASTER_FLAG_SWCLOCK;
+ master->master.read = fsi_master_acf_read;
+ master->master.write = fsi_master_acf_write;
+ master->master.term = fsi_master_acf_term;
+ master->master.send_break = fsi_master_acf_break;
+ master->master.link_enable = fsi_master_acf_link_enable;
+ master->master.link_config = fsi_master_acf_link_config;
+ master->master.dev.of_node = of_node_get(dev_of_node(master->dev));
+ master->master.dev.release = fsi_master_acf_release;
+ platform_set_drvdata(pdev, master);
+ mutex_init(&master->lock);
+
+ mutex_lock(&master->lock);
+ rc = fsi_master_acf_setup(master);
+ mutex_unlock(&master->lock);
+ if (rc)
+ goto release_of_dev;
+
+ rc = device_create_file(&pdev->dev, &dev_attr_external_mode);
+ if (rc)
+ goto stop_copro;
+
+ rc = fsi_master_register(&master->master);
+ if (!rc)
+ return 0;
+
+ device_remove_file(master->dev, &dev_attr_external_mode);
+ put_device(&master->master.dev);
+ return rc;
+
+ stop_copro:
+ fsi_master_acf_terminate(master);
+ release_of_dev:
+ aspeed_gpio_copro_set_ops(NULL, NULL);
+ gen_pool_free(master->sram_pool, (unsigned long)master->sram, SRAM_SIZE);
+ of_node_put(dev_of_node(master->dev));
+ err_free:
+ kfree(master);
+ return rc;
+}
+
+
+static int fsi_master_acf_remove(struct platform_device *pdev)
+{
+ struct fsi_master_acf *master = platform_get_drvdata(pdev);
+
+ device_remove_file(master->dev, &dev_attr_external_mode);
+
+ fsi_master_unregister(&master->master);
+
+ return 0;
+}
+
+static const struct of_device_id fsi_master_acf_match[] = {
+ { .compatible = "aspeed,ast2400-cf-fsi-master" },
+ { .compatible = "aspeed,ast2500-cf-fsi-master" },
+ { },
+};
+
+static struct platform_driver fsi_master_acf = {
+ .driver = {
+ .name = "fsi-master-acf",
+ .of_match_table = fsi_master_acf_match,
+ },
+ .probe = fsi_master_acf_probe,
+ .remove = fsi_master_acf_remove,
+};
+
+module_platform_driver(fsi_master_acf);
+MODULE_LICENSE("GPL");
diff --git a/drivers/fsi/fsi-sbefifo.c b/drivers/fsi/fsi-sbefifo.c
index 6b31cc24..33a5d9a 100644
--- a/drivers/fsi/fsi-sbefifo.c
+++ b/drivers/fsi/fsi-sbefifo.c
@@ -136,16 +136,14 @@ struct sbefifo_user {
static DEFINE_IDA(sbefifo_ida);
static DEFINE_MUTEX(sbefifo_ffdc_mutex);
-
-static void sbefifo_dump_ffdc(struct device *dev, const __be32 *ffdc,
- size_t ffdc_sz, bool internal)
+static void __sbefifo_dump_ffdc(struct device *dev, const __be32 *ffdc,
+ size_t ffdc_sz, bool internal)
{
int pack = 0;
#define FFDC_LSIZE 60
static char ffdc_line[FFDC_LSIZE];
char *p = ffdc_line;
- mutex_lock(&sbefifo_ffdc_mutex);
while (ffdc_sz) {
u32 w0, w1, w2, i;
if (ffdc_sz < 3) {
@@ -194,6 +192,13 @@ static void sbefifo_dump_ffdc(struct device *dev, const __be32 *ffdc,
}
dev_warn(dev, "+-------------------------------------------+\n");
}
+}
+
+static void sbefifo_dump_ffdc(struct device *dev, const __be32 *ffdc,
+ size_t ffdc_sz, bool internal)
+{
+ mutex_lock(&sbefifo_ffdc_mutex);
+ __sbefifo_dump_ffdc(dev, ffdc, ffdc_sz, internal);
mutex_unlock(&sbefifo_ffdc_mutex);
}
diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c
index b31ae16..1e00f40 100644
--- a/drivers/gpio/gpio-aspeed.c
+++ b/drivers/gpio/gpio-aspeed.c
@@ -12,6 +12,7 @@
#include <asm/div64.h>
#include <linux/clk.h>
#include <linux/gpio/driver.h>
+#include <linux/gpio/aspeed.h>
#include <linux/hashtable.h>
#include <linux/init.h>
#include <linux/io.h>
@@ -22,6 +23,15 @@
#include <linux/spinlock.h>
#include <linux/string.h>
+/*
+ * These two headers aren't meant to be used by GPIO drivers. We need
+ * them in order to access gpio_chip_hwgpio() which we need to implement
+ * the aspeed specific API which allows the coprocessor to request
+ * access to some GPIOs and to arbitrate between coprocessor and ARM.
+ */
+#include <linux/gpio/consumer.h>
+#include "gpiolib.h"
+
struct aspeed_bank_props {
unsigned int bank;
u32 input;
@@ -56,83 +66,130 @@ struct aspeed_gpio {
struct clk *clk;
u32 *dcache;
+ u8 *cf_copro_bankmap;
};
struct aspeed_gpio_bank {
- uint16_t val_regs;
+ uint16_t val_regs; /* +0: Rd: read input value, Wr: set write latch
+ * +4: Rd/Wr: Direction (0=in, 1=out)
+ */
+ uint16_t rdata_reg; /* Rd: read write latch, Wr: <none> */
uint16_t irq_regs;
uint16_t debounce_regs;
uint16_t tolerance_regs;
+ uint16_t cmdsrc_regs;
const char names[4][3];
};
+/*
+ * Note: The "value" register returns the input value sampled on the
+ * line even when the GPIO is configured as an output. Since
+ * that input goes through synchronizers, writing, then reading
+ * back may not return the written value right away.
+ *
+ * The "rdata" register returns the content of the write latch
+ * and thus can be used to read back what was last written
+ * reliably.
+ */
+
static const int debounce_timers[4] = { 0x00, 0x50, 0x54, 0x58 };
+static const struct aspeed_gpio_copro_ops *copro_ops;
+static void *copro_data;
+
static const struct aspeed_gpio_bank aspeed_gpio_banks[] = {
{
.val_regs = 0x0000,
+ .rdata_reg = 0x00c0,
.irq_regs = 0x0008,
.debounce_regs = 0x0040,
.tolerance_regs = 0x001c,
+ .cmdsrc_regs = 0x0060,
.names = { "A", "B", "C", "D" },
},
{
.val_regs = 0x0020,
+ .rdata_reg = 0x00c4,
.irq_regs = 0x0028,
.debounce_regs = 0x0048,
.tolerance_regs = 0x003c,
+ .cmdsrc_regs = 0x0068,
.names = { "E", "F", "G", "H" },
},
{
.val_regs = 0x0070,
+ .rdata_reg = 0x00c8,
.irq_regs = 0x0098,
.debounce_regs = 0x00b0,
.tolerance_regs = 0x00ac,
+ .cmdsrc_regs = 0x0090,
.names = { "I", "J", "K", "L" },
},
{
.val_regs = 0x0078,
+ .rdata_reg = 0x00cc,
.irq_regs = 0x00e8,
.debounce_regs = 0x0100,
.tolerance_regs = 0x00fc,
+ .cmdsrc_regs = 0x00e0,
.names = { "M", "N", "O", "P" },
},
{
.val_regs = 0x0080,
+ .rdata_reg = 0x00d0,
.irq_regs = 0x0118,
.debounce_regs = 0x0130,
.tolerance_regs = 0x012c,
+ .cmdsrc_regs = 0x0110,
.names = { "Q", "R", "S", "T" },
},
{
.val_regs = 0x0088,
+ .rdata_reg = 0x00d4,
.irq_regs = 0x0148,
.debounce_regs = 0x0160,
.tolerance_regs = 0x015c,
+ .cmdsrc_regs = 0x0140,
.names = { "U", "V", "W", "X" },
},
{
.val_regs = 0x01E0,
+ .rdata_reg = 0x00d8,
.irq_regs = 0x0178,
.debounce_regs = 0x0190,
.tolerance_regs = 0x018c,
+ .cmdsrc_regs = 0x0170,
.names = { "Y", "Z", "AA", "AB" },
},
{
.val_regs = 0x01e8,
+ .rdata_reg = 0x00dc,
.irq_regs = 0x01a8,
.debounce_regs = 0x01c0,
.tolerance_regs = 0x01bc,
+ .cmdsrc_regs = 0x01a0,
.names = { "AC", "", "", "" },
},
};
-#define GPIO_BANK(x) ((x) >> 5)
-#define GPIO_OFFSET(x) ((x) & 0x1f)
-#define GPIO_BIT(x) BIT(GPIO_OFFSET(x))
+enum aspeed_gpio_reg {
+ reg_val,
+ reg_rdata,
+ reg_dir,
+ reg_irq_enable,
+ reg_irq_type0,
+ reg_irq_type1,
+ reg_irq_type2,
+ reg_irq_status,
+ reg_debounce_sel1,
+ reg_debounce_sel2,
+ reg_tolerance,
+ reg_cmdsrc0,
+ reg_cmdsrc1,
+};
-#define GPIO_DATA 0x00
-#define GPIO_DIR 0x04
+#define GPIO_VAL_VALUE 0x00
+#define GPIO_VAL_DIR 0x04
#define GPIO_IRQ_ENABLE 0x00
#define GPIO_IRQ_TYPE0 0x04
@@ -143,6 +200,53 @@ static const struct aspeed_gpio_bank aspeed_gpio_banks[] = {
#define GPIO_DEBOUNCE_SEL1 0x00
#define GPIO_DEBOUNCE_SEL2 0x04
+#define GPIO_CMDSRC_0 0x00
+#define GPIO_CMDSRC_1 0x04
+#define GPIO_CMDSRC_ARM 0
+#define GPIO_CMDSRC_LPC 1
+#define GPIO_CMDSRC_COLDFIRE 2
+#define GPIO_CMDSRC_RESERVED 3
+
+/* This will be resolved at compile time */
+static inline void __iomem *bank_reg(struct aspeed_gpio *gpio,
+ const struct aspeed_gpio_bank *bank,
+ const enum aspeed_gpio_reg reg)
+{
+ switch (reg) {
+ case reg_val:
+ return gpio->base + bank->val_regs + GPIO_VAL_VALUE;
+ case reg_rdata:
+ return gpio->base + bank->rdata_reg;
+ case reg_dir:
+ return gpio->base + bank->val_regs + GPIO_VAL_DIR;
+ case reg_irq_enable:
+ return gpio->base + bank->irq_regs + GPIO_IRQ_ENABLE;
+ case reg_irq_type0:
+ return gpio->base + bank->irq_regs + GPIO_IRQ_TYPE0;
+ case reg_irq_type1:
+ return gpio->base + bank->irq_regs + GPIO_IRQ_TYPE1;
+ case reg_irq_type2:
+ return gpio->base + bank->irq_regs + GPIO_IRQ_TYPE2;
+ case reg_irq_status:
+ return gpio->base + bank->irq_regs + GPIO_IRQ_STATUS;
+ case reg_debounce_sel1:
+ return gpio->base + bank->debounce_regs + GPIO_DEBOUNCE_SEL1;
+ case reg_debounce_sel2:
+ return gpio->base + bank->debounce_regs + GPIO_DEBOUNCE_SEL2;
+ case reg_tolerance:
+ return gpio->base + bank->tolerance_regs;
+ case reg_cmdsrc0:
+ return gpio->base + bank->cmdsrc_regs + GPIO_CMDSRC_0;
+ case reg_cmdsrc1:
+ return gpio->base + bank->cmdsrc_regs + GPIO_CMDSRC_1;
+ }
+ BUG_ON(1);
+}
+
+#define GPIO_BANK(x) ((x) >> 5)
+#define GPIO_OFFSET(x) ((x) & 0x1f)
+#define GPIO_BIT(x) BIT(GPIO_OFFSET(x))
+
#define _GPIO_SET_DEBOUNCE(t, o, i) ((!!((t) & BIT(i))) << GPIO_OFFSET(o))
#define GPIO_SET_DEBOUNCE1(t, o) _GPIO_SET_DEBOUNCE(t, o, 1)
#define GPIO_SET_DEBOUNCE2(t, o) _GPIO_SET_DEBOUNCE(t, o, 0)
@@ -201,18 +305,80 @@ static inline bool have_output(struct aspeed_gpio *gpio, unsigned int offset)
return !props || (props->output & GPIO_BIT(offset));
}
-static void __iomem *bank_val_reg(struct aspeed_gpio *gpio,
- const struct aspeed_gpio_bank *bank,
- unsigned int reg)
+static void aspeed_gpio_change_cmd_source(struct aspeed_gpio *gpio,
+ const struct aspeed_gpio_bank *bank,
+ int bindex, int cmdsrc)
{
- return gpio->base + bank->val_regs + reg;
+ void __iomem *c0 = bank_reg(gpio, bank, reg_cmdsrc0);
+ void __iomem *c1 = bank_reg(gpio, bank, reg_cmdsrc1);
+ u32 bit, reg;
+
+ /*
+ * Each register controls 4 banks, so take the bottom 2
+ * bits of the bank index, and use them to select the
+ * right control bit (0, 8, 16 or 24).
+ */
+ bit = BIT((bindex & 3) << 3);
+
+ /* Source 1 first to avoid illegal 11 combination */
+ reg = ioread32(c1);
+ if (cmdsrc & 2)
+ reg |= bit;
+ else
+ reg &= ~bit;
+ iowrite32(reg, c1);
+
+ /* Then Source 0 */
+ reg = ioread32(c0);
+ if (cmdsrc & 1)
+ reg |= bit;
+ else
+ reg &= ~bit;
+ iowrite32(reg, c0);
}
-static void __iomem *bank_irq_reg(struct aspeed_gpio *gpio,
- const struct aspeed_gpio_bank *bank,
- unsigned int reg)
+static bool aspeed_gpio_copro_request(struct aspeed_gpio *gpio,
+ unsigned int offset)
{
- return gpio->base + bank->irq_regs + reg;
+ const struct aspeed_gpio_bank *bank = to_bank(offset);
+
+ if (!copro_ops || !gpio->cf_copro_bankmap)
+ return false;
+ if (!gpio->cf_copro_bankmap[offset >> 3])
+ return false;
+ if (!copro_ops->request_access)
+ return false;
+
+ /* Pause the coprocessor */
+ copro_ops->request_access(copro_data);
+
+ /* Change command source back to ARM */
+ aspeed_gpio_change_cmd_source(gpio, bank, offset >> 3, GPIO_CMDSRC_ARM);
+
+ /* Update cache */
+ gpio->dcache[GPIO_BANK(offset)] = ioread32(bank_reg(gpio, bank, reg_rdata));
+
+ return true;
+}
+
+static void aspeed_gpio_copro_release(struct aspeed_gpio *gpio,
+ unsigned int offset)
+{
+ const struct aspeed_gpio_bank *bank = to_bank(offset);
+
+ if (!copro_ops || !gpio->cf_copro_bankmap)
+ return;
+ if (!gpio->cf_copro_bankmap[offset >> 3])
+ return;
+ if (!copro_ops->release_access)
+ return;
+
+ /* Change command source back to ColdFire */
+ aspeed_gpio_change_cmd_source(gpio, bank, offset >> 3,
+ GPIO_CMDSRC_COLDFIRE);
+
+ /* Restart the coprocessor */
+ copro_ops->release_access(copro_data);
}
static int aspeed_gpio_get(struct gpio_chip *gc, unsigned int offset)
@@ -220,8 +386,7 @@ static int aspeed_gpio_get(struct gpio_chip *gc, unsigned int offset)
struct aspeed_gpio *gpio = gpiochip_get_data(gc);
const struct aspeed_gpio_bank *bank = to_bank(offset);
- return !!(ioread32(bank_val_reg(gpio, bank, GPIO_DATA))
- & GPIO_BIT(offset));
+ return !!(ioread32(bank_reg(gpio, bank, reg_val)) & GPIO_BIT(offset));
}
static void __aspeed_gpio_set(struct gpio_chip *gc, unsigned int offset,
@@ -232,7 +397,7 @@ static void __aspeed_gpio_set(struct gpio_chip *gc, unsigned int offset,
void __iomem *addr;
u32 reg;
- addr = bank_val_reg(gpio, bank, GPIO_DATA);
+ addr = bank_reg(gpio, bank, reg_val);
reg = gpio->dcache[GPIO_BANK(offset)];
if (val)
@@ -249,11 +414,15 @@ static void aspeed_gpio_set(struct gpio_chip *gc, unsigned int offset,
{
struct aspeed_gpio *gpio = gpiochip_get_data(gc);
unsigned long flags;
+ bool copro;
spin_lock_irqsave(&gpio->lock, flags);
+ copro = aspeed_gpio_copro_request(gpio, offset);
__aspeed_gpio_set(gc, offset, val);
+ if (copro)
+ aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
}
@@ -261,7 +430,9 @@ static int aspeed_gpio_dir_in(struct gpio_chip *gc, unsigned int offset)
{
struct aspeed_gpio *gpio = gpiochip_get_data(gc);
const struct aspeed_gpio_bank *bank = to_bank(offset);
+ void __iomem *addr = bank_reg(gpio, bank, reg_dir);
unsigned long flags;
+ bool copro;
u32 reg;
if (!have_input(gpio, offset))
@@ -269,8 +440,13 @@ static int aspeed_gpio_dir_in(struct gpio_chip *gc, unsigned int offset)
spin_lock_irqsave(&gpio->lock, flags);
- reg = ioread32(bank_val_reg(gpio, bank, GPIO_DIR));
- iowrite32(reg & ~GPIO_BIT(offset), bank_val_reg(gpio, bank, GPIO_DIR));
+ reg = ioread32(addr);
+ reg &= ~GPIO_BIT(offset);
+
+ copro = aspeed_gpio_copro_request(gpio, offset);
+ iowrite32(reg, addr);
+ if (copro)
+ aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
@@ -282,7 +458,9 @@ static int aspeed_gpio_dir_out(struct gpio_chip *gc,
{
struct aspeed_gpio *gpio = gpiochip_get_data(gc);
const struct aspeed_gpio_bank *bank = to_bank(offset);
+ void __iomem *addr = bank_reg(gpio, bank, reg_dir);
unsigned long flags;
+ bool copro;
u32 reg;
if (!have_output(gpio, offset))
@@ -290,10 +468,15 @@ static int aspeed_gpio_dir_out(struct gpio_chip *gc,
spin_lock_irqsave(&gpio->lock, flags);
+ reg = ioread32(addr);
+ reg |= GPIO_BIT(offset);
+
+ copro = aspeed_gpio_copro_request(gpio, offset);
__aspeed_gpio_set(gc, offset, val);
- reg = ioread32(bank_val_reg(gpio, bank, GPIO_DIR));
- iowrite32(reg | GPIO_BIT(offset), bank_val_reg(gpio, bank, GPIO_DIR));
+ iowrite32(reg, addr);
+ if (copro)
+ aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
return 0;
@@ -314,7 +497,7 @@ static int aspeed_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
spin_lock_irqsave(&gpio->lock, flags);
- val = ioread32(bank_val_reg(gpio, bank, GPIO_DIR)) & GPIO_BIT(offset);
+ val = ioread32(bank_reg(gpio, bank, reg_dir)) & GPIO_BIT(offset);
spin_unlock_irqrestore(&gpio->lock, flags);
@@ -323,24 +506,23 @@ static int aspeed_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
}
static inline int irqd_to_aspeed_gpio_data(struct irq_data *d,
- struct aspeed_gpio **gpio,
- const struct aspeed_gpio_bank **bank,
- u32 *bit)
+ struct aspeed_gpio **gpio,
+ const struct aspeed_gpio_bank **bank,
+ u32 *bit, int *offset)
{
- int offset;
struct aspeed_gpio *internal;
- offset = irqd_to_hwirq(d);
+ *offset = irqd_to_hwirq(d);
internal = irq_data_get_irq_chip_data(d);
/* This might be a bit of a questionable place to check */
- if (!have_irq(internal, offset))
+ if (!have_irq(internal, *offset))
return -ENOTSUPP;
*gpio = internal;
- *bank = to_bank(offset);
- *bit = GPIO_BIT(offset);
+ *bank = to_bank(*offset);
+ *bit = GPIO_BIT(*offset);
return 0;
}
@@ -351,17 +533,23 @@ static void aspeed_gpio_irq_ack(struct irq_data *d)
struct aspeed_gpio *gpio;
unsigned long flags;
void __iomem *status_addr;
+ int rc, offset;
+ bool copro;
u32 bit;
- int rc;
- rc = irqd_to_aspeed_gpio_data(d, &gpio, &bank, &bit);
+ rc = irqd_to_aspeed_gpio_data(d, &gpio, &bank, &bit, &offset);
if (rc)
return;
- status_addr = bank_irq_reg(gpio, bank, GPIO_IRQ_STATUS);
+ status_addr = bank_reg(gpio, bank, reg_irq_status);
spin_lock_irqsave(&gpio->lock, flags);
+ copro = aspeed_gpio_copro_request(gpio, offset);
+
iowrite32(bit, status_addr);
+
+ if (copro)
+ aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
}
@@ -372,15 +560,17 @@ static void aspeed_gpio_irq_set_mask(struct irq_data *d, bool set)
unsigned long flags;
u32 reg, bit;
void __iomem *addr;
- int rc;
+ int rc, offset;
+ bool copro;
- rc = irqd_to_aspeed_gpio_data(d, &gpio, &bank, &bit);
+ rc = irqd_to_aspeed_gpio_data(d, &gpio, &bank, &bit, &offset);
if (rc)
return;
- addr = bank_irq_reg(gpio, bank, GPIO_IRQ_ENABLE);
+ addr = bank_reg(gpio, bank, reg_irq_enable);
spin_lock_irqsave(&gpio->lock, flags);
+ copro = aspeed_gpio_copro_request(gpio, offset);
reg = ioread32(addr);
if (set)
@@ -389,6 +579,8 @@ static void aspeed_gpio_irq_set_mask(struct irq_data *d, bool set)
reg &= ~bit;
iowrite32(reg, addr);
+ if (copro)
+ aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
}
@@ -413,9 +605,10 @@ static int aspeed_gpio_set_type(struct irq_data *d, unsigned int type)
struct aspeed_gpio *gpio;
unsigned long flags;
void __iomem *addr;
- int rc;
+ int rc, offset;
+ bool copro;
- rc = irqd_to_aspeed_gpio_data(d, &gpio, &bank, &bit);
+ rc = irqd_to_aspeed_gpio_data(d, &gpio, &bank, &bit, &offset);
if (rc)
return -EINVAL;
@@ -441,22 +634,25 @@ static int aspeed_gpio_set_type(struct irq_data *d, unsigned int type)
}
spin_lock_irqsave(&gpio->lock, flags);
+ copro = aspeed_gpio_copro_request(gpio, offset);
- addr = bank_irq_reg(gpio, bank, GPIO_IRQ_TYPE0);
+ addr = bank_reg(gpio, bank, reg_irq_type0);
reg = ioread32(addr);
reg = (reg & ~bit) | type0;
iowrite32(reg, addr);
- addr = bank_irq_reg(gpio, bank, GPIO_IRQ_TYPE1);
+ addr = bank_reg(gpio, bank, reg_irq_type1);
reg = ioread32(addr);
reg = (reg & ~bit) | type1;
iowrite32(reg, addr);
- addr = bank_irq_reg(gpio, bank, GPIO_IRQ_TYPE2);
+ addr = bank_reg(gpio, bank, reg_irq_type2);
reg = ioread32(addr);
reg = (reg & ~bit) | type2;
iowrite32(reg, addr);
+ if (copro)
+ aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
irq_set_handler_locked(d, handler);
@@ -477,7 +673,7 @@ static void aspeed_gpio_irq_handler(struct irq_desc *desc)
for (i = 0; i < ARRAY_SIZE(aspeed_gpio_banks); i++) {
const struct aspeed_gpio_bank *bank = &aspeed_gpio_banks[i];
- reg = ioread32(bank_irq_reg(data, bank, GPIO_IRQ_STATUS));
+ reg = ioread32(bank_reg(data, bank, reg_irq_status));
for_each_set_bit(p, &reg, 32) {
girq = irq_find_mapping(gc->irq.domain, i * 32 + p);
@@ -549,21 +745,27 @@ static int aspeed_gpio_reset_tolerance(struct gpio_chip *chip,
unsigned int offset, bool enable)
{
struct aspeed_gpio *gpio = gpiochip_get_data(chip);
- const struct aspeed_gpio_bank *bank;
unsigned long flags;
+ void __iomem *treg;
+ bool copro;
u32 val;
- bank = to_bank(offset);
+ treg = bank_reg(gpio, to_bank(offset), reg_tolerance);
spin_lock_irqsave(&gpio->lock, flags);
- val = readl(gpio->base + bank->tolerance_regs);
+ copro = aspeed_gpio_copro_request(gpio, offset);
+
+ val = readl(treg);
if (enable)
val |= GPIO_BIT(offset);
else
val &= ~GPIO_BIT(offset);
- writel(val, gpio->base + bank->tolerance_regs);
+ writel(val, treg);
+
+ if (copro)
+ aspeed_gpio_copro_release(gpio, offset);
spin_unlock_irqrestore(&gpio->lock, flags);
return 0;
@@ -582,13 +784,6 @@ static void aspeed_gpio_free(struct gpio_chip *chip, unsigned int offset)
pinctrl_gpio_free(chip->base + offset);
}
-static inline void __iomem *bank_debounce_reg(struct aspeed_gpio *gpio,
- const struct aspeed_gpio_bank *bank,
- unsigned int reg)
-{
- return gpio->base + bank->debounce_regs + reg;
-}
-
static int usecs_to_cycles(struct aspeed_gpio *gpio, unsigned long usecs,
u32 *cycles)
{
@@ -666,11 +861,14 @@ static void configure_timer(struct aspeed_gpio *gpio, unsigned int offset,
void __iomem *addr;
u32 val;
- addr = bank_debounce_reg(gpio, bank, GPIO_DEBOUNCE_SEL1);
+ /* Note: Debounce timer isn't under control of the command
+ * source registers, so no need to sync with the coprocessor
+ */
+ addr = bank_reg(gpio, bank, reg_debounce_sel1);
val = ioread32(addr);
iowrite32((val & ~mask) | GPIO_SET_DEBOUNCE1(timer, offset), addr);
- addr = bank_debounce_reg(gpio, bank, GPIO_DEBOUNCE_SEL2);
+ addr = bank_reg(gpio, bank, reg_debounce_sel2);
val = ioread32(addr);
iowrite32((val & ~mask) | GPIO_SET_DEBOUNCE2(timer, offset), addr);
}
@@ -812,6 +1010,111 @@ static int aspeed_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
return -ENOTSUPP;
}
+/**
+ * aspeed_gpio_copro_set_ops - Sets the callbacks used for handhsaking with
+ * the coprocessor for shared GPIO banks
+ * @ops: The callbacks
+ * @data: Pointer passed back to the callbacks
+ */
+int aspeed_gpio_copro_set_ops(const struct aspeed_gpio_copro_ops *ops, void *data)
+{
+ copro_data = data;
+ copro_ops = ops;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(aspeed_gpio_copro_set_ops);
+
+/**
+ * aspeed_gpio_copro_grab_gpio - Mark a GPIO used by the coprocessor. The entire
+ * bank gets marked and any access from the ARM will
+ * result in handshaking via callbacks.
+ * @desc: The GPIO to be marked
+ * @vreg_offset: If non-NULL, returns the value register offset in the GPIO space
+ * @dreg_offset: If non-NULL, returns the data latch register offset in the GPIO space
+ * @bit: If non-NULL, returns the bit number of the GPIO in the registers
+ */
+int aspeed_gpio_copro_grab_gpio(struct gpio_desc *desc,
+ u16 *vreg_offset, u16 *dreg_offset, u8 *bit)
+{
+ struct gpio_chip *chip = gpiod_to_chip(desc);
+ struct aspeed_gpio *gpio = gpiochip_get_data(chip);
+ int rc = 0, bindex, offset = gpio_chip_hwgpio(desc);
+ const struct aspeed_gpio_bank *bank = to_bank(offset);
+ unsigned long flags;
+
+ if (!gpio->cf_copro_bankmap)
+ gpio->cf_copro_bankmap = kzalloc(gpio->config->nr_gpios >> 3, GFP_KERNEL);
+ if (!gpio->cf_copro_bankmap)
+ return -ENOMEM;
+ if (offset < 0 || offset > gpio->config->nr_gpios)
+ return -EINVAL;
+ bindex = offset >> 3;
+
+ spin_lock_irqsave(&gpio->lock, flags);
+
+ /* Sanity check, this shouldn't happen */
+ if (gpio->cf_copro_bankmap[bindex] == 0xff) {
+ rc = -EIO;
+ goto bail;
+ }
+ gpio->cf_copro_bankmap[bindex]++;
+
+ /* Switch command source */
+ if (gpio->cf_copro_bankmap[bindex] == 1)
+ aspeed_gpio_change_cmd_source(gpio, bank, bindex,
+ GPIO_CMDSRC_COLDFIRE);
+
+ if (vreg_offset)
+ *vreg_offset = bank->val_regs;
+ if (dreg_offset)
+ *dreg_offset = bank->rdata_reg;
+ if (bit)
+ *bit = GPIO_OFFSET(offset);
+ bail:
+ spin_unlock_irqrestore(&gpio->lock, flags);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(aspeed_gpio_copro_grab_gpio);
+
+/**
+ * aspeed_gpio_copro_release_gpio - Unmark a GPIO used by the coprocessor.
+ * @desc: The GPIO to be marked
+ */
+int aspeed_gpio_copro_release_gpio(struct gpio_desc *desc)
+{
+ struct gpio_chip *chip = gpiod_to_chip(desc);
+ struct aspeed_gpio *gpio = gpiochip_get_data(chip);
+ int rc = 0, bindex, offset = gpio_chip_hwgpio(desc);
+ const struct aspeed_gpio_bank *bank = to_bank(offset);
+ unsigned long flags;
+
+ if (!gpio->cf_copro_bankmap)
+ return -ENXIO;
+
+ if (offset < 0 || offset > gpio->config->nr_gpios)
+ return -EINVAL;
+ bindex = offset >> 3;
+
+ spin_lock_irqsave(&gpio->lock, flags);
+
+ /* Sanity check, this shouldn't happen */
+ if (gpio->cf_copro_bankmap[bindex] == 0) {
+ rc = -EIO;
+ goto bail;
+ }
+ gpio->cf_copro_bankmap[bindex]--;
+
+ /* Switch command source */
+ if (gpio->cf_copro_bankmap[bindex] == 0)
+ aspeed_gpio_change_cmd_source(gpio, bank, bindex,
+ GPIO_CMDSRC_ARM);
+ bail:
+ spin_unlock_irqrestore(&gpio->lock, flags);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(aspeed_gpio_copro_release_gpio);
+
/*
* Any banks not specified in a struct aspeed_bank_props array are assumed to
* have the properties:
@@ -902,11 +1205,18 @@ static int __init aspeed_gpio_probe(struct platform_device *pdev)
if (!gpio->dcache)
return -ENOMEM;
- /* Populate it with initial values read from the HW */
+ /*
+ * Populate it with initial values read from the HW and switch
+ * all command sources to the ARM by default
+ */
for (i = 0; i < banks; i++) {
const struct aspeed_gpio_bank *bank = &aspeed_gpio_banks[i];
- gpio->dcache[i] = ioread32(gpio->base + bank->val_regs +
- GPIO_DATA);
+ void __iomem *addr = bank_reg(gpio, bank, reg_rdata);
+ gpio->dcache[i] = ioread32(addr);
+ aspeed_gpio_change_cmd_source(gpio, bank, 0, GPIO_CMDSRC_ARM);
+ aspeed_gpio_change_cmd_source(gpio, bank, 1, GPIO_CMDSRC_ARM);
+ aspeed_gpio_change_cmd_source(gpio, bank, 2, GPIO_CMDSRC_ARM);
+ aspeed_gpio_change_cmd_source(gpio, bank, 3, GPIO_CMDSRC_ARM);
}
rc = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);
diff --git a/include/linux/device.h b/include/linux/device.h
index 055a69d..6aa8d51 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -696,6 +696,10 @@ extern void devm_free_pages(struct device *dev, unsigned long addr);
void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res);
+void __iomem *devm_of_iomap(struct device *dev,
+ struct device_node *node, int index,
+ resource_size_t *size);
+
/* allows to add/remove a custom action to devres stack */
int devm_add_action(struct device *dev, void (*action)(void *), void *data);
void devm_remove_action(struct device *dev, void (*action)(void *), void *data);
diff --git a/include/linux/gpio/aspeed.h b/include/linux/gpio/aspeed.h
new file mode 100644
index 0000000..1bfb3cd
--- /dev/null
+++ b/include/linux/gpio/aspeed.h
@@ -0,0 +1,15 @@
+#ifndef __GPIO_ASPEED_H
+#define __GPIO_ASPEED_H
+
+struct aspeed_gpio_copro_ops {
+ int (*request_access)(void *data);
+ int (*release_access)(void *data);
+};
+
+int aspeed_gpio_copro_grab_gpio(struct gpio_desc *desc,
+ u16 *vreg_offset, u16 *dreg_offset, u8 *bit);
+int aspeed_gpio_copro_release_gpio(struct gpio_desc *desc);
+int aspeed_gpio_copro_set_ops(const struct aspeed_gpio_copro_ops *ops, void *data);
+
+
+#endif /* __GPIO_ASPEED_H */
diff --git a/include/trace/events/fsi_master_ast_cf.h b/include/trace/events/fsi_master_ast_cf.h
new file mode 100644
index 0000000..a0fdfa5
--- /dev/null
+++ b/include/trace/events/fsi_master_ast_cf.h
@@ -0,0 +1,150 @@
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM fsi_master_ast_cf
+
+#if !defined(_TRACE_FSI_MASTER_ACF_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_FSI_MASTER_ACF_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(fsi_master_acf_copro_command,
+ TP_PROTO(const struct fsi_master_acf *master, uint32_t op),
+ TP_ARGS(master, op),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(uint32_t, op)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->op = op;
+ ),
+ TP_printk("fsi-acf%d command %08x",
+ __entry->master_idx, __entry->op
+ )
+);
+
+TRACE_EVENT(fsi_master_acf_send_request,
+ TP_PROTO(const struct fsi_master_acf *master, const struct fsi_msg *cmd, u8 rbits),
+ TP_ARGS(master, cmd, rbits),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(uint64_t, msg)
+ __field(u8, bits)
+ __field(u8, rbits)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->msg = cmd->msg;
+ __entry->bits = cmd->bits;
+ __entry->rbits = rbits;
+ ),
+ TP_printk("fsi-acf%d cmd: %016llx/%d/%d",
+ __entry->master_idx, (unsigned long long)__entry->msg,
+ __entry->bits, __entry->rbits
+ )
+);
+
+TRACE_EVENT(fsi_master_acf_copro_response,
+ TP_PROTO(const struct fsi_master_acf *master, u8 rtag, u8 rcrc, __be32 rdata, bool crc_ok),
+ TP_ARGS(master, rtag, rcrc, rdata, crc_ok),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(u8, rtag)
+ __field(u8, rcrc)
+ __field(u32, rdata)
+ __field(bool, crc_ok)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->rtag = rtag;
+ __entry->rcrc = rcrc;
+ __entry->rdata = be32_to_cpu(rdata);
+ __entry->crc_ok = crc_ok;
+ ),
+ TP_printk("fsi-acf%d rsp: tag=%04x crc=%04x data=%08x %c\n",
+ __entry->master_idx, __entry->rtag, __entry->rcrc,
+ __entry->rdata, __entry->crc_ok ? ' ' : '!'
+ )
+);
+
+TRACE_EVENT(fsi_master_acf_crc_rsp_error,
+ TP_PROTO(const struct fsi_master_acf *master, int retries),
+ TP_ARGS(master, retries),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, retries)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->retries = retries;
+ ),
+ TP_printk("fsi-acf%d CRC error in response retry %d",
+ __entry->master_idx, __entry->retries
+ )
+);
+
+TRACE_EVENT(fsi_master_acf_poll_response_busy,
+ TP_PROTO(const struct fsi_master_acf *master, int busy_count),
+ TP_ARGS(master, busy_count),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, busy_count)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->busy_count = busy_count;
+ ),
+ TP_printk("fsi-acf%d: device reported busy %d times",
+ __entry->master_idx, __entry->busy_count
+ )
+);
+
+TRACE_EVENT(fsi_master_acf_cmd_abs_addr,
+ TP_PROTO(const struct fsi_master_acf *master, u32 addr),
+ TP_ARGS(master, addr),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(u32, addr)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->addr = addr;
+ ),
+ TP_printk("fsi-acf%d: Sending ABS_ADR %06x",
+ __entry->master_idx, __entry->addr
+ )
+);
+
+TRACE_EVENT(fsi_master_acf_cmd_rel_addr,
+ TP_PROTO(const struct fsi_master_acf *master, u32 rel_addr),
+ TP_ARGS(master, rel_addr),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(u32, rel_addr)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->rel_addr = rel_addr;
+ ),
+ TP_printk("fsi-acf%d: Sending REL_ADR %03x",
+ __entry->master_idx, __entry->rel_addr
+ )
+);
+
+TRACE_EVENT(fsi_master_acf_cmd_same_addr,
+ TP_PROTO(const struct fsi_master_acf *master),
+ TP_ARGS(master),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ ),
+ TP_printk("fsi-acf%d: Sending SAME_ADR",
+ __entry->master_idx
+ )
+);
+
+#endif /* _TRACE_FSI_MASTER_ACF_H */
+
+#include <trace/define_trace.h>
diff --git a/lib/devres.c b/lib/devres.c
index 5bec112..faccf1a 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -4,6 +4,7 @@
#include <linux/io.h>
#include <linux/gfp.h>
#include <linux/export.h>
+#include <linux/of_address.h>
enum devm_ioremap_type {
DEVM_IOREMAP = 0,
@@ -162,6 +163,41 @@ void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
}
EXPORT_SYMBOL(devm_ioremap_resource);
+/*
+ * devm_of_iomap - Requests a resource and maps the memory mapped IO
+ * for a given device_node managed by a given device
+ *
+ * Checks that a resource is a valid memory region, requests the memory
+ * region and ioremaps it. All operations are managed and will be undone
+ * on driver detach of the device.
+ *
+ * This is to be used when a device requests/maps resources described
+ * by other device tree nodes (children or otherwise).
+ *
+ * @dev: The device "managing" the resource
+ * @node: The device-tree node where the resource resides
+ * @index: index of the MMIO range in the "reg" property
+ * @size: Returns the size of the resource (pass NULL if not needed)
+ * Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded
+ * error code on failure. Usage example:
+ *
+ * base = devm_of_iomap(&pdev->dev, node, 0, NULL);
+ * if (IS_ERR(base))
+ * return PTR_ERR(base);
+ */
+void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
+ resource_size_t *size)
+{
+ struct resource res;
+
+ if (of_address_to_resource(node, index, &res))
+ return IOMEM_ERR_PTR(-EINVAL);
+ if (size)
+ *size = resource_size(&res);
+ return devm_ioremap_resource(dev, &res);
+}
+EXPORT_SYMBOL(devm_of_iomap);
+
#ifdef CONFIG_HAS_IOPORT_MAP
/*
* Generic iomap devres
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