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[PATCH V3 13/14] MIPS: ralink: adds support for MT7620 SoC family

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH V3 13/14] MIPS: ralink: adds support for MT7620 SoC family
From: John Crispin <blogic@openwrt.org>
Date: Sat, 13 Apr 2013 10:48:24 +0200
Cc: linux-mips@linux-mips.org, John Crispin <blogic@openwrt.org>
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Add support code for mt7620 SOC.

The code detects the SoC and registers the clk / pinmux settings.

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/include/asm/mach-ralink/mt7620.h |   66 +++++++++
 arch/mips/ralink/Kconfig                   |    3 +
 arch/mips/ralink/Makefile                  |    1 +
 arch/mips/ralink/Platform                  |    5 +
 arch/mips/ralink/mt7620.c                  |  204 ++++++++++++++++++++++++++++
 5 files changed, 279 insertions(+)
 create mode 100644 arch/mips/include/asm/mach-ralink/mt7620.h
 create mode 100644 arch/mips/ralink/mt7620.c

diff --git a/arch/mips/include/asm/mach-ralink/mt7620.h 
b/arch/mips/include/asm/mach-ralink/mt7620.h
new file mode 100644
index 0000000..3d51235
--- /dev/null
+++ b/arch/mips/include/asm/mach-ralink/mt7620.h
@@ -0,0 +1,66 @@
+/*
+ * 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.
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#ifndef _MT7620_REGS_H_
+#define _MT7620_REGS_H_
+
+#define MT7620_SYSC_BASE               0x10000000
+
+#define SYSC_REG_CHIP_NAME0            0x00
+#define SYSC_REG_CHIP_NAME1            0x04
+#define SYSC_REG_CHIP_REV              0x0c
+#define SYSC_REG_SYSTEM_CONFIG0                0x10
+#define SYSC_REG_SYSTEM_CONFIG1                0x14
+#define SYSC_REG_CPLL_CONFIG0          0x54
+#define SYSC_REG_CPLL_CONFIG1          0x58
+
+#define MT7620N_CHIP_NAME0             0x33365452
+#define MT7620N_CHIP_NAME1             0x20203235
+
+#define MT7620A_CHIP_NAME0             0x3637544d
+#define MT7620A_CHIP_NAME1             0x20203032
+
+#define CHIP_REV_PKG_MASK              0x1
+#define CHIP_REV_PKG_SHIFT             16
+#define CHIP_REV_VER_MASK              0xf
+#define CHIP_REV_VER_SHIFT             8
+#define CHIP_REV_ECO_MASK              0xf
+
+#define MT7620_CPLL_SW_CONFIG_SHIFT    31
+#define MT7620_CPLL_SW_CONFIG_MASK     0x1
+#define MT7620_CPLL_CPU_CLK_SHIFT      24
+#define MT7620_CPLL_CPU_CLK_MASK       0x1
+
+#define MT7620_GPIO_MODE_I2C           BIT(0)
+#define MT7620_GPIO_MODE_UART0_SHIFT   2
+#define MT7620_GPIO_MODE_UART0_MASK    0x7
+#define MT7620_GPIO_MODE_UART0(x)      ((x) << MT7620_GPIO_MODE_UART0_SHIFT)
+#define MT7620_GPIO_MODE_UARTF         0x0
+#define MT7620_GPIO_MODE_PCM_UARTF     0x1
+#define MT7620_GPIO_MODE_PCM_I2S       0x2
+#define MT7620_GPIO_MODE_I2S_UARTF     0x3
+#define MT7620_GPIO_MODE_PCM_GPIO      0x4
+#define MT7620_GPIO_MODE_GPIO_UARTF    0x5
+#define MT7620_GPIO_MODE_GPIO_I2S      0x6
+#define MT7620_GPIO_MODE_GPIO          0x7
+#define MT7620_GPIO_MODE_UART1         BIT(5)
+#define MT7620_GPIO_MODE_MDIO          BIT(8)
+#define MT7620_GPIO_MODE_RGMII1                BIT(9)
+#define MT7620_GPIO_MODE_RGMII2                BIT(10)
+#define MT7620_GPIO_MODE_SPI           BIT(11)
+#define MT7620_GPIO_MODE_SPI_REF_CLK   BIT(12)
+#define MT7620_GPIO_MODE_WLED          BIT(13)
+#define MT7620_GPIO_MODE_JTAG          BIT(15)
+#define MT7620_GPIO_MODE_EPHY          BIT(15)
+#define MT7620_GPIO_MODE_WDT           BIT(22)
+
+#endif
diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig
index ce57d3e..86f6c77 100644
--- a/arch/mips/ralink/Kconfig
+++ b/arch/mips/ralink/Kconfig
@@ -20,6 +20,9 @@ choice
                select USB_ARCH_HAS_OHCI
                select USB_ARCH_HAS_EHCI
 
+       config SOC_MT7620
+               bool "MT7620"
+
 endchoice
 
 choice
diff --git a/arch/mips/ralink/Makefile b/arch/mips/ralink/Makefile
index ba9669c..38cf1a8 100644
--- a/arch/mips/ralink/Makefile
+++ b/arch/mips/ralink/Makefile
@@ -11,6 +11,7 @@ obj-y := prom.o of.o reset.o clk.o irq.o
 obj-$(CONFIG_SOC_RT288X) += rt288x.o
 obj-$(CONFIG_SOC_RT305X) += rt305x.o
 obj-$(CONFIG_SOC_RT3883) += rt3883.o
+obj-$(CONFIG_SOC_MT7620) += mt7620.o
 
 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
 
diff --git a/arch/mips/ralink/Platform b/arch/mips/ralink/Platform
index f67c08d..b2cbf16 100644
--- a/arch/mips/ralink/Platform
+++ b/arch/mips/ralink/Platform
@@ -18,3 +18,8 @@ load-$(CONFIG_SOC_RT305X)     += 0xffffffff80000000
 # Ralink RT3883
 #
 load-$(CONFIG_SOC_RT3883)      += 0xffffffff80000000
+
+#
+# Ralink MT7620
+#
+load-$(CONFIG_SOC_MT7620)      += 0xffffffff80000000
diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c
new file mode 100644
index 0000000..c26b9fa
--- /dev/null
+++ b/arch/mips/ralink/mt7620.c
@@ -0,0 +1,204 @@
+/*
+ * 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.
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/mipsregs.h>
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/mt7620.h>
+
+#include "common.h"
+
+
+static struct ralink_pinmux_grp mode_mux[] = {
+       {
+               .name = "i2c",
+               .mask = MT7620_GPIO_MODE_I2C,
+               .gpio_first = 1,
+               .gpio_last = 2,
+       }, {
+               .name = "spi",
+               .mask = MT7620_GPIO_MODE_SPI,
+               .gpio_first = 3,
+               .gpio_last = 6,
+       }, {
+               .name = "uartlite",
+               .mask = MT7620_GPIO_MODE_UART1,
+               .gpio_first = 15,
+               .gpio_last = 16,
+       }, {
+               .name = "wdt",
+               .mask = MT7620_GPIO_MODE_WDT,
+               .gpio_first = 17,
+               .gpio_last = 17,
+       }, {
+               .name = "mdio",
+               .mask = MT7620_GPIO_MODE_MDIO,
+               .gpio_first = 22,
+               .gpio_last = 23,
+       }, {
+               .name = "rgmii1",
+               .mask = MT7620_GPIO_MODE_RGMII1,
+               .gpio_first = 24,
+               .gpio_last = 35,
+       }, {
+               .name = "spi refclk",
+               .mask = MT7620_GPIO_MODE_SPI_REF_CLK,
+               .gpio_first = 37,
+               .gpio_last = 39,
+       }, {
+               .name = "jtag",
+               .mask = MT7620_GPIO_MODE_JTAG,
+               .gpio_first = 40,
+               .gpio_last = 44,
+       }, {
+               /* shared lines with jtag */
+               .name = "ephy",
+               .mask = MT7620_GPIO_MODE_EPHY,
+               .gpio_first = 40,
+               .gpio_last = 44,
+       }, {
+               .name = "nand",
+               .mask = MT7620_GPIO_MODE_JTAG,
+               .gpio_first = 45,
+               .gpio_last = 59,
+       }, {
+               .name = "rgmii2",
+               .mask = MT7620_GPIO_MODE_RGMII2,
+               .gpio_first = 60,
+               .gpio_last = 71,
+       }, {
+               .name = "wled",
+               .mask = MT7620_GPIO_MODE_WLED,
+               .gpio_first = 72,
+               .gpio_last = 72,
+       }, {0}
+};
+
+static struct ralink_pinmux_grp uart_mux[] = {
+       {
+               .name = "uartf",
+               .mask = MT7620_GPIO_MODE_UARTF,
+               .gpio_first = 7,
+               .gpio_last = 14,
+       }, {
+               .name = "pcm uartf",
+               .mask = MT7620_GPIO_MODE_PCM_UARTF,
+               .gpio_first = 7,
+               .gpio_last = 14,
+       }, {
+               .name = "pcm i2s",
+               .mask = MT7620_GPIO_MODE_PCM_I2S,
+               .gpio_first = 7,
+               .gpio_last = 14,
+       }, {
+               .name = "i2s uartf",
+               .mask = MT7620_GPIO_MODE_I2S_UARTF,
+               .gpio_first = 7,
+               .gpio_last = 14,
+       }, {
+               .name = "pcm gpio",
+               .mask = MT7620_GPIO_MODE_PCM_GPIO,
+               .gpio_first = 11,
+               .gpio_last = 14,
+       }, {
+               .name = "gpio uartf",
+               .mask = MT7620_GPIO_MODE_GPIO_UARTF,
+               .gpio_first = 7,
+               .gpio_last = 10,
+       }, {
+               .name = "gpio i2s",
+               .mask = MT7620_GPIO_MODE_GPIO_I2S,
+               .gpio_first = 7,
+               .gpio_last = 10,
+       }, {
+               .name = "gpio",
+               .mask = MT7620_GPIO_MODE_GPIO,
+       }, {0}
+};
+
+struct ralink_pinmux rt_gpio_pinmux = {
+       .mode = mode_mux,
+       .uart = uart_mux,
+       .uart_shift = MT7620_GPIO_MODE_UART0_SHIFT,
+       .uart_mask = MT7620_GPIO_MODE_GPIO,
+};
+
+void __init ralink_clk_init(void)
+{
+       unsigned long cpu_rate, sys_rate;
+       u32 c0 = rt_sysc_r32(SYSC_REG_CPLL_CONFIG0);
+       u32 c1 = rt_sysc_r32(SYSC_REG_CPLL_CONFIG1);
+
+       c0 = (c0 >> MT7620_CPLL_SW_CONFIG_SHIFT) &
+               MT7620_CPLL_SW_CONFIG_MASK;
+       c1 = (c1 >> MT7620_CPLL_CPU_CLK_SHIFT) &
+            MT7620_CPLL_CPU_CLK_MASK;
+       if (c1 == 0x01) {
+               cpu_rate = 480000000;
+       } else {
+               if (c1 == 0x0) {
+                       cpu_rate = 600000000;
+               } else {
+                       /* TODO calculate custom clock from pll settings */
+                       BUG();
+               }
+       }
+       /* FIXME  SDR - 4, DDR - 3 */
+       sys_rate = cpu_rate / 4;
+
+       ralink_clk_add("cpu", cpu_rate);
+       ralink_clk_add("10000100.timer", 40000000);
+       ralink_clk_add("10000500.uart", 40000000);
+       ralink_clk_add("10000c00.uartlite", 40000000);
+}
+
+void __init ralink_of_remap(void)
+{
+       rt_sysc_membase = plat_of_remap_node("ralink,mt7620-sysc");
+       rt_memc_membase = plat_of_remap_node("ralink,mt7620-memc");
+
+       if (!rt_sysc_membase || !rt_memc_membase)
+               panic("Failed to remap core resources");
+}
+
+void prom_soc_init(struct ralink_soc_info *soc_info)
+{
+       void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7620_SYSC_BASE);
+       unsigned char *name = NULL;
+       u32 n0;
+       u32 n1;
+       u32 rev;
+
+       n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
+       n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
+
+       if (n0 == MT7620N_CHIP_NAME0 && n1 == MT7620N_CHIP_NAME1) {
+               name = "MT7620N";
+               soc_info->compatible = "ralink,mt7620n-soc";
+       } else if (n0 == MT7620A_CHIP_NAME0 && n1 == MT7620A_CHIP_NAME1) {
+               name = "MT7620A";
+               soc_info->compatible = "ralink,mt7620a-soc";
+       } else {
+               panic("mt7620: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
+       }
+
+       rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
+
+       snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
+               "Ralink %s ver:%u eco:%u",
+               name,
+               (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
+               (rev & CHIP_REV_ECO_MASK));
+}
-- 
1.7.10.4


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