forked from Minki/linux
2809b31770
Add support code for rt3050, rt3052, rt3350, rt3352 and rt5350 SOC. The code detects the SoC and registers the clk / pinmux settings. Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/4896/
243 lines
6.1 KiB
C
243 lines
6.1 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* Parts of this file are based on Ralink's 2.6.21 BSP
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*
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* Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <asm/mipsregs.h>
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#include <asm/mach-ralink/ralink_regs.h>
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#include <asm/mach-ralink/rt305x.h>
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#include "common.h"
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enum rt305x_soc_type rt305x_soc;
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struct ralink_pinmux_grp mode_mux[] = {
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{
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.name = "i2c",
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.mask = RT305X_GPIO_MODE_I2C,
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.gpio_first = RT305X_GPIO_I2C_SD,
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.gpio_last = RT305X_GPIO_I2C_SCLK,
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}, {
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.name = "spi",
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.mask = RT305X_GPIO_MODE_SPI,
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.gpio_first = RT305X_GPIO_SPI_EN,
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.gpio_last = RT305X_GPIO_SPI_CLK,
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}, {
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.name = "uartlite",
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.mask = RT305X_GPIO_MODE_UART1,
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.gpio_first = RT305X_GPIO_UART1_TXD,
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.gpio_last = RT305X_GPIO_UART1_RXD,
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}, {
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.name = "jtag",
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.mask = RT305X_GPIO_MODE_JTAG,
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.gpio_first = RT305X_GPIO_JTAG_TDO,
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.gpio_last = RT305X_GPIO_JTAG_TDI,
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}, {
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.name = "mdio",
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.mask = RT305X_GPIO_MODE_MDIO,
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.gpio_first = RT305X_GPIO_MDIO_MDC,
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.gpio_last = RT305X_GPIO_MDIO_MDIO,
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}, {
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.name = "sdram",
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.mask = RT305X_GPIO_MODE_SDRAM,
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.gpio_first = RT305X_GPIO_SDRAM_MD16,
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.gpio_last = RT305X_GPIO_SDRAM_MD31,
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}, {
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.name = "rgmii",
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.mask = RT305X_GPIO_MODE_RGMII,
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.gpio_first = RT305X_GPIO_GE0_TXD0,
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.gpio_last = RT305X_GPIO_GE0_RXCLK,
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}, {0}
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};
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struct ralink_pinmux_grp uart_mux[] = {
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{
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.name = "uartf",
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.mask = RT305X_GPIO_MODE_UARTF,
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.gpio_first = RT305X_GPIO_7,
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.gpio_last = RT305X_GPIO_14,
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}, {
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.name = "pcm uartf",
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.mask = RT305X_GPIO_MODE_PCM_UARTF,
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.gpio_first = RT305X_GPIO_7,
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.gpio_last = RT305X_GPIO_14,
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}, {
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.name = "pcm i2s",
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.mask = RT305X_GPIO_MODE_PCM_I2S,
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.gpio_first = RT305X_GPIO_7,
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.gpio_last = RT305X_GPIO_14,
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}, {
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.name = "i2s uartf",
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.mask = RT305X_GPIO_MODE_I2S_UARTF,
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.gpio_first = RT305X_GPIO_7,
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.gpio_last = RT305X_GPIO_14,
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}, {
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.name = "pcm gpio",
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.mask = RT305X_GPIO_MODE_PCM_GPIO,
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.gpio_first = RT305X_GPIO_10,
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.gpio_last = RT305X_GPIO_14,
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}, {
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.name = "gpio uartf",
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.mask = RT305X_GPIO_MODE_GPIO_UARTF,
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.gpio_first = RT305X_GPIO_7,
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.gpio_last = RT305X_GPIO_14,
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}, {
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.name = "gpio i2s",
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.mask = RT305X_GPIO_MODE_GPIO_I2S,
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.gpio_first = RT305X_GPIO_7,
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.gpio_last = RT305X_GPIO_14,
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}, {
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.name = "gpio",
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.mask = RT305X_GPIO_MODE_GPIO,
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}, {0}
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};
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void rt305x_wdt_reset(void)
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{
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u32 t;
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/* enable WDT reset output on pin SRAM_CS_N */
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t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
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t |= RT305X_SYSCFG_SRAM_CS0_MODE_WDT <<
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RT305X_SYSCFG_SRAM_CS0_MODE_SHIFT;
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rt_sysc_w32(t, SYSC_REG_SYSTEM_CONFIG);
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}
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struct ralink_pinmux gpio_pinmux = {
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.mode = mode_mux,
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.uart = uart_mux,
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.uart_shift = RT305X_GPIO_MODE_UART0_SHIFT,
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.wdt_reset = rt305x_wdt_reset,
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};
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void __init ralink_clk_init(void)
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{
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unsigned long cpu_rate, sys_rate, wdt_rate, uart_rate;
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u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
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if (soc_is_rt305x() || soc_is_rt3350()) {
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t = (t >> RT305X_SYSCFG_CPUCLK_SHIFT) &
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RT305X_SYSCFG_CPUCLK_MASK;
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switch (t) {
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case RT305X_SYSCFG_CPUCLK_LOW:
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cpu_rate = 320000000;
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break;
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case RT305X_SYSCFG_CPUCLK_HIGH:
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cpu_rate = 384000000;
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break;
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}
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sys_rate = uart_rate = wdt_rate = cpu_rate / 3;
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} else if (soc_is_rt3352()) {
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t = (t >> RT3352_SYSCFG0_CPUCLK_SHIFT) &
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RT3352_SYSCFG0_CPUCLK_MASK;
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switch (t) {
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case RT3352_SYSCFG0_CPUCLK_LOW:
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cpu_rate = 384000000;
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break;
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case RT3352_SYSCFG0_CPUCLK_HIGH:
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cpu_rate = 400000000;
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break;
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}
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sys_rate = wdt_rate = cpu_rate / 3;
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uart_rate = 40000000;
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} else if (soc_is_rt5350()) {
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t = (t >> RT5350_SYSCFG0_CPUCLK_SHIFT) &
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RT5350_SYSCFG0_CPUCLK_MASK;
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switch (t) {
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case RT5350_SYSCFG0_CPUCLK_360:
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cpu_rate = 360000000;
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sys_rate = cpu_rate / 3;
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break;
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case RT5350_SYSCFG0_CPUCLK_320:
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cpu_rate = 320000000;
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sys_rate = cpu_rate / 4;
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break;
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case RT5350_SYSCFG0_CPUCLK_300:
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cpu_rate = 300000000;
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sys_rate = cpu_rate / 3;
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break;
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default:
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BUG();
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}
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uart_rate = 40000000;
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wdt_rate = sys_rate;
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} else {
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BUG();
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}
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ralink_clk_add("cpu", cpu_rate);
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ralink_clk_add("10000b00.spi", sys_rate);
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ralink_clk_add("10000100.timer", wdt_rate);
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ralink_clk_add("10000500.uart", uart_rate);
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ralink_clk_add("10000c00.uartlite", uart_rate);
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}
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void __init ralink_of_remap(void)
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{
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rt_sysc_membase = plat_of_remap_node("ralink,rt3050-sysc");
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rt_memc_membase = plat_of_remap_node("ralink,rt3050-memc");
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if (!rt_sysc_membase || !rt_memc_membase)
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panic("Failed to remap core resources");
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}
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void prom_soc_init(struct ralink_soc_info *soc_info)
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{
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void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE);
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unsigned char *name;
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u32 n0;
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u32 n1;
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u32 id;
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n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
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n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
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if (n0 == RT3052_CHIP_NAME0 && n1 == RT3052_CHIP_NAME1) {
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unsigned long icache_sets;
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icache_sets = (read_c0_config1() >> 22) & 7;
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if (icache_sets == 1) {
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rt305x_soc = RT305X_SOC_RT3050;
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name = "RT3050";
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soc_info->compatible = "ralink,rt3050-soc";
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} else {
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rt305x_soc = RT305X_SOC_RT3052;
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name = "RT3052";
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soc_info->compatible = "ralink,rt3052-soc";
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}
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} else if (n0 == RT3350_CHIP_NAME0 && n1 == RT3350_CHIP_NAME1) {
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rt305x_soc = RT305X_SOC_RT3350;
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name = "RT3350";
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soc_info->compatible = "ralink,rt3350-soc";
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} else if (n0 == RT3352_CHIP_NAME0 && n1 == RT3352_CHIP_NAME1) {
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rt305x_soc = RT305X_SOC_RT3352;
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name = "RT3352";
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soc_info->compatible = "ralink,rt3352-soc";
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} else if (n0 == RT5350_CHIP_NAME0 && n1 == RT5350_CHIP_NAME1) {
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rt305x_soc = RT305X_SOC_RT5350;
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name = "RT5350";
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soc_info->compatible = "ralink,rt5350-soc";
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} else {
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panic("rt305x: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
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}
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id = __raw_readl(sysc + SYSC_REG_CHIP_ID);
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snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
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"Ralink %s id:%u rev:%u",
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name,
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(id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
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(id & CHIP_ID_REV_MASK));
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}
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