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linux-sg2042/arch/mips/ralink/rt305x.c

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/*
* 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/rt305x.h>
#include "common.h"
enum rt305x_soc_type rt305x_soc;
static struct ralink_pinmux_grp mode_mux[] = {
{
.name = "i2c",
.mask = RT305X_GPIO_MODE_I2C,
.gpio_first = RT305X_GPIO_I2C_SD,
.gpio_last = RT305X_GPIO_I2C_SCLK,
}, {
.name = "spi",
.mask = RT305X_GPIO_MODE_SPI,
.gpio_first = RT305X_GPIO_SPI_EN,
.gpio_last = RT305X_GPIO_SPI_CLK,
}, {
.name = "uartlite",
.mask = RT305X_GPIO_MODE_UART1,
.gpio_first = RT305X_GPIO_UART1_TXD,
.gpio_last = RT305X_GPIO_UART1_RXD,
}, {
.name = "jtag",
.mask = RT305X_GPIO_MODE_JTAG,
.gpio_first = RT305X_GPIO_JTAG_TDO,
.gpio_last = RT305X_GPIO_JTAG_TDI,
}, {
.name = "mdio",
.mask = RT305X_GPIO_MODE_MDIO,
.gpio_first = RT305X_GPIO_MDIO_MDC,
.gpio_last = RT305X_GPIO_MDIO_MDIO,
}, {
.name = "sdram",
.mask = RT305X_GPIO_MODE_SDRAM,
.gpio_first = RT305X_GPIO_SDRAM_MD16,
.gpio_last = RT305X_GPIO_SDRAM_MD31,
}, {
.name = "rgmii",
.mask = RT305X_GPIO_MODE_RGMII,
.gpio_first = RT305X_GPIO_GE0_TXD0,
.gpio_last = RT305X_GPIO_GE0_RXCLK,
}, {0}
};
static struct ralink_pinmux_grp uart_mux[] = {
{
.name = "uartf",
.mask = RT305X_GPIO_MODE_UARTF,
.gpio_first = RT305X_GPIO_7,
.gpio_last = RT305X_GPIO_14,
}, {
.name = "pcm uartf",
.mask = RT305X_GPIO_MODE_PCM_UARTF,
.gpio_first = RT305X_GPIO_7,
.gpio_last = RT305X_GPIO_14,
}, {
.name = "pcm i2s",
.mask = RT305X_GPIO_MODE_PCM_I2S,
.gpio_first = RT305X_GPIO_7,
.gpio_last = RT305X_GPIO_14,
}, {
.name = "i2s uartf",
.mask = RT305X_GPIO_MODE_I2S_UARTF,
.gpio_first = RT305X_GPIO_7,
.gpio_last = RT305X_GPIO_14,
}, {
.name = "pcm gpio",
.mask = RT305X_GPIO_MODE_PCM_GPIO,
.gpio_first = RT305X_GPIO_10,
.gpio_last = RT305X_GPIO_14,
}, {
.name = "gpio uartf",
.mask = RT305X_GPIO_MODE_GPIO_UARTF,
.gpio_first = RT305X_GPIO_7,
.gpio_last = RT305X_GPIO_10,
}, {
.name = "gpio i2s",
.mask = RT305X_GPIO_MODE_GPIO_I2S,
.gpio_first = RT305X_GPIO_7,
.gpio_last = RT305X_GPIO_10,
}, {
.name = "gpio",
.mask = RT305X_GPIO_MODE_GPIO,
}, {0}
};
static void rt305x_wdt_reset(void)
{
u32 t;
/* enable WDT reset output on pin SRAM_CS_N */
t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
t |= RT305X_SYSCFG_SRAM_CS0_MODE_WDT <<
RT305X_SYSCFG_SRAM_CS0_MODE_SHIFT;
rt_sysc_w32(t, SYSC_REG_SYSTEM_CONFIG);
}
struct ralink_pinmux rt_gpio_pinmux = {
.mode = mode_mux,
.uart = uart_mux,
.uart_shift = RT305X_GPIO_MODE_UART0_SHIFT,
.uart_mask = RT305X_GPIO_MODE_UART0_MASK,
.wdt_reset = rt305x_wdt_reset,
};
static unsigned long rt5350_get_mem_size(void)
{
void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE);
unsigned long ret;
u32 t;
t = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG);
t = (t >> RT5350_SYSCFG0_DRAM_SIZE_SHIFT) &
RT5350_SYSCFG0_DRAM_SIZE_MASK;
switch (t) {
case RT5350_SYSCFG0_DRAM_SIZE_2M:
ret = 2;
break;
case RT5350_SYSCFG0_DRAM_SIZE_8M:
ret = 8;
break;
case RT5350_SYSCFG0_DRAM_SIZE_16M:
ret = 16;
break;
case RT5350_SYSCFG0_DRAM_SIZE_32M:
ret = 32;
break;
case RT5350_SYSCFG0_DRAM_SIZE_64M:
ret = 64;
break;
default:
panic("rt5350: invalid DRAM size: %u", t);
break;
}
return ret;
}
void __init ralink_clk_init(void)
{
unsigned long cpu_rate, sys_rate, wdt_rate, uart_rate;
unsigned long wmac_rate = 40000000;
u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
if (soc_is_rt305x() || soc_is_rt3350()) {
t = (t >> RT305X_SYSCFG_CPUCLK_SHIFT) &
RT305X_SYSCFG_CPUCLK_MASK;
switch (t) {
case RT305X_SYSCFG_CPUCLK_LOW:
cpu_rate = 320000000;
break;
case RT305X_SYSCFG_CPUCLK_HIGH:
cpu_rate = 384000000;
break;
}
sys_rate = uart_rate = wdt_rate = cpu_rate / 3;
} else if (soc_is_rt3352()) {
t = (t >> RT3352_SYSCFG0_CPUCLK_SHIFT) &
RT3352_SYSCFG0_CPUCLK_MASK;
switch (t) {
case RT3352_SYSCFG0_CPUCLK_LOW:
cpu_rate = 384000000;
break;
case RT3352_SYSCFG0_CPUCLK_HIGH:
cpu_rate = 400000000;
break;
}
sys_rate = wdt_rate = cpu_rate / 3;
uart_rate = 40000000;
} else if (soc_is_rt5350()) {
t = (t >> RT5350_SYSCFG0_CPUCLK_SHIFT) &
RT5350_SYSCFG0_CPUCLK_MASK;
switch (t) {
case RT5350_SYSCFG0_CPUCLK_360:
cpu_rate = 360000000;
sys_rate = cpu_rate / 3;
break;
case RT5350_SYSCFG0_CPUCLK_320:
cpu_rate = 320000000;
sys_rate = cpu_rate / 4;
break;
case RT5350_SYSCFG0_CPUCLK_300:
cpu_rate = 300000000;
sys_rate = cpu_rate / 3;
break;
default:
BUG();
}
uart_rate = 40000000;
wdt_rate = sys_rate;
} else {
BUG();
}
if (soc_is_rt3352() || soc_is_rt5350()) {
u32 val = rt_sysc_r32(RT3352_SYSC_REG_SYSCFG0);
if (!(val & RT3352_CLKCFG0_XTAL_SEL))
wmac_rate = 20000000;
}
ralink_clk_add("cpu", cpu_rate);
ralink_clk_add("10000b00.spi", sys_rate);
ralink_clk_add("10000100.timer", wdt_rate);
ralink_clk_add("10000120.watchdog", wdt_rate);
ralink_clk_add("10000500.uart", uart_rate);
ralink_clk_add("10000c00.uartlite", uart_rate);
ralink_clk_add("10100000.ethernet", sys_rate);
ralink_clk_add("10180000.wmac", wmac_rate);
}
void __init ralink_of_remap(void)
{
rt_sysc_membase = plat_of_remap_node("ralink,rt3050-sysc");
rt_memc_membase = plat_of_remap_node("ralink,rt3050-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(RT305X_SYSC_BASE);
unsigned char *name;
u32 n0;
u32 n1;
u32 id;
n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
if (n0 == RT3052_CHIP_NAME0 && n1 == RT3052_CHIP_NAME1) {
unsigned long icache_sets;
icache_sets = (read_c0_config1() >> 22) & 7;
if (icache_sets == 1) {
rt305x_soc = RT305X_SOC_RT3050;
name = "RT3050";
soc_info->compatible = "ralink,rt3050-soc";
} else {
rt305x_soc = RT305X_SOC_RT3052;
name = "RT3052";
soc_info->compatible = "ralink,rt3052-soc";
}
} else if (n0 == RT3350_CHIP_NAME0 && n1 == RT3350_CHIP_NAME1) {
rt305x_soc = RT305X_SOC_RT3350;
name = "RT3350";
soc_info->compatible = "ralink,rt3350-soc";
} else if (n0 == RT3352_CHIP_NAME0 && n1 == RT3352_CHIP_NAME1) {
rt305x_soc = RT305X_SOC_RT3352;
name = "RT3352";
soc_info->compatible = "ralink,rt3352-soc";
} else if (n0 == RT5350_CHIP_NAME0 && n1 == RT5350_CHIP_NAME1) {
rt305x_soc = RT305X_SOC_RT5350;
name = "RT5350";
soc_info->compatible = "ralink,rt5350-soc";
} else {
panic("rt305x: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
}
id = __raw_readl(sysc + SYSC_REG_CHIP_ID);
snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
"Ralink %s id:%u rev:%u",
name,
(id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
(id & CHIP_ID_REV_MASK));
soc_info->mem_base = RT305X_SDRAM_BASE;
if (soc_is_rt5350()) {
soc_info->mem_size = rt5350_get_mem_size();
} else if (soc_is_rt305x() || soc_is_rt3350()) {
soc_info->mem_size_min = RT305X_MEM_SIZE_MIN;
soc_info->mem_size_max = RT305X_MEM_SIZE_MAX;
} else if (soc_is_rt3352()) {
soc_info->mem_size_min = RT3352_MEM_SIZE_MIN;
soc_info->mem_size_max = RT3352_MEM_SIZE_MAX;
}
}
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