MIPS: BCM63XX: add support for BCM3368 Cable Modem

The Broadcom BCM3368 Cable Modem SoC is extremely similar to the
existing BCM63xx DSL SoCs, in particular BCM6358, therefore little effort
in the existing code base is required to get it supported. This patch adds
support for the following on-chip peripherals:

- two UARTS
- GPIO
- Ethernet
- SPI
- PCI
- NOR Flash

The most noticeable difference with 3368 is that it has its peripheral
register at 0xfff8_0000 we check that separately in ioremap.h. Since
3368 is identical to 6358 for its clock and reset bits, we use them
verbatim.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: cernekee@gmail.com
Cc: jogo@openwrt.org
Patchwork: https://patchwork.linux-mips.org/patch/5499/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

4 files changed, 159 insertions, 1 deletions

diff --git a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
index 3362289..9d3c08e 100644
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
@@ -9,6 +9,7 @@
  * compile time if only one CPU support is enabled (idea stolen from
  * arm mach-types)
  */
+#define BCM3368_CPU_ID		0x3368
 #define BCM6328_CPU_ID		0x6328
 #define BCM6338_CPU_ID		0x6338
 #define BCM6345_CPU_ID		0x6345
@@ -22,6 +23,19 @@ u16 __bcm63xx_get_cpu_id(void);
 u8 bcm63xx_get_cpu_rev(void);
 unsigned int bcm63xx_get_cpu_freq(void);
 
+#ifdef CONFIG_BCM63XX_CPU_3368
+# ifdef bcm63xx_get_cpu_id
+#  undef bcm63xx_get_cpu_id
+#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
+#  define BCMCPU_RUNTIME_DETECT
+# else
+#  define bcm63xx_get_cpu_id()	BCM3368_CPU_ID
+# endif
+# define BCMCPU_IS_3368()	(bcm63xx_get_cpu_id() == BCM3368_CPU_ID)
+#else
+# define BCMCPU_IS_3368()	(0)
+#endif
+
 #ifdef CONFIG_BCM63XX_CPU_6328
 # ifdef bcm63xx_get_cpu_id
 #  undef bcm63xx_get_cpu_id
@@ -191,6 +205,53 @@ enum bcm63xx_regs_set {
 #define RSET_RNG_SIZE			20
 
 /*
+ * 3368 register sets base address
+ */
+#define BCM_3368_DSL_LMEM_BASE		(0xdeadbeef)
+#define BCM_3368_PERF_BASE		(0xfff8c000)
+#define BCM_3368_TIMER_BASE		(0xfff8c040)
+#define BCM_3368_WDT_BASE		(0xfff8c080)
+#define BCM_3368_UART0_BASE		(0xfff8c100)
+#define BCM_3368_UART1_BASE		(0xfff8c120)
+#define BCM_3368_GPIO_BASE		(0xfff8c080)
+#define BCM_3368_SPI_BASE		(0xfff8c800)
+#define BCM_3368_HSSPI_BASE		(0xdeadbeef)
+#define BCM_3368_UDC0_BASE		(0xdeadbeef)
+#define BCM_3368_USBDMA_BASE		(0xdeadbeef)
+#define BCM_3368_OHCI0_BASE		(0xdeadbeef)
+#define BCM_3368_OHCI_PRIV_BASE		(0xdeadbeef)
+#define BCM_3368_USBH_PRIV_BASE		(0xdeadbeef)
+#define BCM_3368_USBD_BASE		(0xdeadbeef)
+#define BCM_3368_MPI_BASE		(0xfff80000)
+#define BCM_3368_PCMCIA_BASE		(0xfff80054)
+#define BCM_3368_PCIE_BASE		(0xdeadbeef)
+#define BCM_3368_SDRAM_REGS_BASE	(0xdeadbeef)
+#define BCM_3368_DSL_BASE		(0xdeadbeef)
+#define BCM_3368_UBUS_BASE		(0xdeadbeef)
+#define BCM_3368_ENET0_BASE		(0xfff98000)
+#define BCM_3368_ENET1_BASE		(0xfff98800)
+#define BCM_3368_ENETDMA_BASE		(0xfff99800)
+#define BCM_3368_ENETDMAC_BASE		(0xfff99900)
+#define BCM_3368_ENETDMAS_BASE		(0xfff99a00)
+#define BCM_3368_ENETSW_BASE		(0xdeadbeef)
+#define BCM_3368_EHCI0_BASE		(0xdeadbeef)
+#define BCM_3368_SDRAM_BASE		(0xdeadbeef)
+#define BCM_3368_MEMC_BASE		(0xfff84000)
+#define BCM_3368_DDR_BASE		(0xdeadbeef)
+#define BCM_3368_M2M_BASE		(0xdeadbeef)
+#define BCM_3368_ATM_BASE		(0xdeadbeef)
+#define BCM_3368_XTM_BASE		(0xdeadbeef)
+#define BCM_3368_XTMDMA_BASE		(0xdeadbeef)
+#define BCM_3368_XTMDMAC_BASE		(0xdeadbeef)
+#define BCM_3368_XTMDMAS_BASE		(0xdeadbeef)
+#define BCM_3368_PCM_BASE		(0xfff9c200)
+#define BCM_3368_PCMDMA_BASE		(0xdeadbeef)
+#define BCM_3368_PCMDMAC_BASE		(0xdeadbeef)
+#define BCM_3368_PCMDMAS_BASE		(0xdeadbeef)
+#define BCM_3368_RNG_BASE		(0xdeadbeef)
+#define BCM_3368_MISC_BASE		(0xdeadbeef)
+
+/*
  * 6328 register sets base address
  */
 #define BCM_6328_DSL_LMEM_BASE		(0xdeadbeef)
@@ -620,6 +681,9 @@ static inline unsigned long bcm63xx_regset_address(enum bcm63xx_regs_set set)
 #ifdef BCMCPU_RUNTIME_DETECT
 	return bcm63xx_regs_base[set];
 #else
+#ifdef CONFIG_BCM63XX_CPU_3368
+	__GEN_RSET(3368)
+#endif
 #ifdef CONFIG_BCM63XX_CPU_6328
 	__GEN_RSET(6328)
 #endif
@@ -687,6 +751,52 @@ enum bcm63xx_irq {
 };
 
 /*
+ * 3368 irqs
+ */
+#define BCM_3368_TIMER_IRQ		(IRQ_INTERNAL_BASE + 0)
+#define BCM_3368_SPI_IRQ		(IRQ_INTERNAL_BASE + 1)
+#define BCM_3368_UART0_IRQ		(IRQ_INTERNAL_BASE + 2)
+#define BCM_3368_UART1_IRQ		(IRQ_INTERNAL_BASE + 3)
+#define BCM_3368_DSL_IRQ		0
+#define BCM_3368_UDC0_IRQ		0
+#define BCM_3368_OHCI0_IRQ		0
+#define BCM_3368_ENET0_IRQ		(IRQ_INTERNAL_BASE + 8)
+#define BCM_3368_ENET1_IRQ		(IRQ_INTERNAL_BASE + 6)
+#define BCM_3368_ENET_PHY_IRQ		(IRQ_INTERNAL_BASE + 9)
+#define BCM_3368_ENET0_RXDMA_IRQ	(IRQ_INTERNAL_BASE + 15)
+#define BCM_3368_ENET0_TXDMA_IRQ	(IRQ_INTERNAL_BASE + 16)
+#define BCM_3368_HSSPI_IRQ		0
+#define BCM_3368_EHCI0_IRQ		0
+#define BCM_3368_USBD_IRQ		0
+#define BCM_3368_USBD_RXDMA0_IRQ	0
+#define BCM_3368_USBD_TXDMA0_IRQ	0
+#define BCM_3368_USBD_RXDMA1_IRQ	0
+#define BCM_3368_USBD_TXDMA1_IRQ	0
+#define BCM_3368_USBD_RXDMA2_IRQ	0
+#define BCM_3368_USBD_TXDMA2_IRQ	0
+#define BCM_3368_ENET1_RXDMA_IRQ        (IRQ_INTERNAL_BASE + 17)
+#define BCM_3368_ENET1_TXDMA_IRQ        (IRQ_INTERNAL_BASE + 18)
+#define BCM_3368_PCI_IRQ		(IRQ_INTERNAL_BASE + 31)
+#define BCM_3368_PCMCIA_IRQ		0
+#define BCM_3368_ATM_IRQ		0
+#define BCM_3368_ENETSW_RXDMA0_IRQ	0
+#define BCM_3368_ENETSW_RXDMA1_IRQ	0
+#define BCM_3368_ENETSW_RXDMA2_IRQ	0
+#define BCM_3368_ENETSW_RXDMA3_IRQ	0
+#define BCM_3368_ENETSW_TXDMA0_IRQ	0
+#define BCM_3368_ENETSW_TXDMA1_IRQ	0
+#define BCM_3368_ENETSW_TXDMA2_IRQ	0
+#define BCM_3368_ENETSW_TXDMA3_IRQ	0
+#define BCM_3368_XTM_IRQ		0
+#define BCM_3368_XTM_DMA0_IRQ		0
+
+#define BCM_3368_EXT_IRQ0		(IRQ_INTERNAL_BASE + 25)
+#define BCM_3368_EXT_IRQ1		(IRQ_INTERNAL_BASE + 26)
+#define BCM_3368_EXT_IRQ2		(IRQ_INTERNAL_BASE + 27)
+#define BCM_3368_EXT_IRQ3		(IRQ_INTERNAL_BASE + 28)
+
+
+/*
  * 6328 irqs
  */
 #define BCM_6328_HIGH_IRQ_BASE		(IRQ_INTERNAL_BASE + 32)
diff --git a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_gpio.h b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_gpio.h
index 35baa1a..565ff36 100644
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_gpio.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_gpio.h
@@ -11,6 +11,7 @@ static inline unsigned long bcm63xx_gpio_count(void)
 	switch (bcm63xx_get_cpu_id()) {
 	case BCM6328_CPU_ID:
 		return 32;
+	case BCM3368_CPU_ID:
 	case BCM6358_CPU_ID:
 		return 40;
 	case BCM6338_CPU_ID:
diff --git a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
index 3203fe4..6542137 100644
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
@@ -15,6 +15,39 @@
 /* Clock Control register */
 #define PERF_CKCTL_REG			0x4
 
+#define CKCTL_3368_MAC_EN		(1 << 3)
+#define CKCTL_3368_TC_EN		(1 << 5)
+#define CKCTL_3368_US_TOP_EN		(1 << 6)
+#define CKCTL_3368_DS_TOP_EN		(1 << 7)
+#define CKCTL_3368_APM_EN		(1 << 8)
+#define CKCTL_3368_SPI_EN		(1 << 9)
+#define CKCTL_3368_USBS_EN		(1 << 10)
+#define CKCTL_3368_BMU_EN		(1 << 11)
+#define CKCTL_3368_PCM_EN		(1 << 12)
+#define CKCTL_3368_NTP_EN		(1 << 13)
+#define CKCTL_3368_ACP_B_EN		(1 << 14)
+#define CKCTL_3368_ACP_A_EN		(1 << 15)
+#define CKCTL_3368_EMUSB_EN		(1 << 17)
+#define CKCTL_3368_ENET0_EN		(1 << 18)
+#define CKCTL_3368_ENET1_EN		(1 << 19)
+#define CKCTL_3368_USBU_EN		(1 << 20)
+#define CKCTL_3368_EPHY_EN		(1 << 21)
+
+#define CKCTL_3368_ALL_SAFE_EN		(CKCTL_3368_MAC_EN | \
+					 CKCTL_3368_TC_EN | \
+					 CKCTL_3368_US_TOP_EN | \
+					 CKCTL_3368_DS_TOP_EN | \
+					 CKCTL_3368_APM_EN | \
+					 CKCTL_3368_SPI_EN | \
+					 CKCTL_3368_USBS_EN | \
+					 CKCTL_3368_BMU_EN | \
+					 CKCTL_3368_PCM_EN | \
+					 CKCTL_3368_NTP_EN | \
+					 CKCTL_3368_ACP_B_EN | \
+					 CKCTL_3368_ACP_A_EN | \
+					 CKCTL_3368_EMUSB_EN | \
+					 CKCTL_3368_USBU_EN)
+
 #define CKCTL_6328_PHYMIPS_EN		(1 << 0)
 #define CKCTL_6328_ADSL_QPROC_EN	(1 << 1)
 #define CKCTL_6328_ADSL_AFE_EN		(1 << 2)
@@ -181,6 +214,7 @@
 #define SYS_PLL_SOFT_RESET		0x1
 
 /* Interrupt Mask register */
+#define PERF_IRQMASK_3368_REG		0xc
 #define PERF_IRQMASK_6328_REG		0x20
 #define PERF_IRQMASK_6338_REG		0xc
 #define PERF_IRQMASK_6345_REG		0xc
@@ -190,6 +224,7 @@
 #define PERF_IRQMASK_6368_REG		0x20
 
 /* Interrupt Status register */
+#define PERF_IRQSTAT_3368_REG		0x10
 #define PERF_IRQSTAT_6328_REG		0x28
 #define PERF_IRQSTAT_6338_REG		0x10
 #define PERF_IRQSTAT_6345_REG		0x10
@@ -199,6 +234,7 @@
 #define PERF_IRQSTAT_6368_REG		0x28
 
 /* External Interrupt Configuration register */
+#define PERF_EXTIRQ_CFG_REG_3368	0x14
 #define PERF_EXTIRQ_CFG_REG_6328	0x18
 #define PERF_EXTIRQ_CFG_REG_6338	0x14
 #define PERF_EXTIRQ_CFG_REG_6345	0x14
@@ -236,6 +272,13 @@
 #define PERF_SOFTRESET_6362_REG		0x10
 #define PERF_SOFTRESET_6368_REG		0x10
 
+#define SOFTRESET_3368_SPI_MASK		(1 << 0)
+#define SOFTRESET_3368_ENET_MASK	(1 << 2)
+#define SOFTRESET_3368_MPI_MASK		(1 << 3)
+#define SOFTRESET_3368_EPHY_MASK	(1 << 6)
+#define SOFTRESET_3368_USBS_MASK	(1 << 11)
+#define SOFTRESET_3368_PCM_MASK		(1 << 13)
+
 #define SOFTRESET_6328_SPI_MASK		(1 << 0)
 #define SOFTRESET_6328_EPHY_MASK	(1 << 1)
 #define SOFTRESET_6328_SAR_MASK		(1 << 2)
@@ -1293,7 +1336,7 @@
 #define SPI_6348_RX_DATA		0x80
 #define SPI_6348_RX_DATA_SIZE		0x3f
 
-/* BCM 6358/6262/6368 SPI core */
+/* BCM 3368/6358/6262/6368 SPI core */
 #define SPI_6358_MSG_CTL		0x00	/* 16-bits register */
 #define SPI_6358_MSG_CTL_WIDTH		16
 #define SPI_6358_MSG_DATA		0x02
diff --git a/arch/mips/include/asm/mach-bcm63xx/ioremap.h b/arch/mips/include/asm/mach-bcm63xx/ioremap.h
index 94e3011..ff15e3b 100644
--- a/arch/mips/include/asm/mach-bcm63xx/ioremap.h
+++ b/arch/mips/include/asm/mach-bcm63xx/ioremap.h
@@ -11,6 +11,10 @@ static inline phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size)
 static inline int is_bcm63xx_internal_registers(phys_t offset)
 {
 	switch (bcm63xx_get_cpu_id()) {
+	case BCM3368_CPU_ID:
+		if (offset >= 0xfff80000)
+			return 1;
+		break;
 	case BCM6338_CPU_ID:
 	case BCM6345_CPU_ID:
 	case BCM6348_CPU_ID: