arch/mips/ralink/rt305x.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify it
   3  * under the terms of the GNU General Public License version 2 as published
   4  * by the Free Software Foundation.
   5  *
   6  * Parts of this file are based on Ralink's 2.6.21 BSP
   7  *
   8  * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
   9  * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  10  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/module.h>
  16
  17 #include <asm/mipsregs.h>
  18 #include <asm/mach-ralink/ralink_regs.h>
  19 #include <asm/mach-ralink/rt305x.h>
  20
  21 #include "common.h"
  22
  23 enum rt305x_soc_type rt305x_soc;
  24
  25 static struct ralink_pinmux_grp mode_mux[] = {
  26         {
  27                 .name = "i2c",
  28                 .mask = RT305X_GPIO_MODE_I2C,
  29                 .gpio_first = RT305X_GPIO_I2C_SD,
  30                 .gpio_last = RT305X_GPIO_I2C_SCLK,
  31         }, {
  32                 .name = "spi",
  33                 .mask = RT305X_GPIO_MODE_SPI,
  34                 .gpio_first = RT305X_GPIO_SPI_EN,
  35                 .gpio_last = RT305X_GPIO_SPI_CLK,
  36         }, {
  37                 .name = "uartlite",
  38                 .mask = RT305X_GPIO_MODE_UART1,
  39                 .gpio_first = RT305X_GPIO_UART1_TXD,
  40                 .gpio_last = RT305X_GPIO_UART1_RXD,
  41         }, {
  42                 .name = "jtag",
  43                 .mask = RT305X_GPIO_MODE_JTAG,
  44                 .gpio_first = RT305X_GPIO_JTAG_TDO,
  45                 .gpio_last = RT305X_GPIO_JTAG_TDI,
  46         }, {
  47                 .name = "mdio",
  48                 .mask = RT305X_GPIO_MODE_MDIO,
  49                 .gpio_first = RT305X_GPIO_MDIO_MDC,
  50                 .gpio_last = RT305X_GPIO_MDIO_MDIO,
  51         }, {
  52                 .name = "sdram",
  53                 .mask = RT305X_GPIO_MODE_SDRAM,
  54                 .gpio_first = RT305X_GPIO_SDRAM_MD16,
  55                 .gpio_last = RT305X_GPIO_SDRAM_MD31,
  56         }, {
  57                 .name = "rgmii",
  58                 .mask = RT305X_GPIO_MODE_RGMII,
  59                 .gpio_first = RT305X_GPIO_GE0_TXD0,
  60                 .gpio_last = RT305X_GPIO_GE0_RXCLK,
  61         }, {0}
  62 };
  63
  64 static struct ralink_pinmux_grp uart_mux[] = {
  65         {
  66                 .name = "uartf",
  67                 .mask = RT305X_GPIO_MODE_UARTF,
  68                 .gpio_first = RT305X_GPIO_7,
  69                 .gpio_last = RT305X_GPIO_14,
  70         }, {
  71                 .name = "pcm uartf",
  72                 .mask = RT305X_GPIO_MODE_PCM_UARTF,
  73                 .gpio_first = RT305X_GPIO_7,
  74                 .gpio_last = RT305X_GPIO_14,
  75         }, {
  76                 .name = "pcm i2s",
  77                 .mask = RT305X_GPIO_MODE_PCM_I2S,
  78                 .gpio_first = RT305X_GPIO_7,
  79                 .gpio_last = RT305X_GPIO_14,
  80         }, {
  81                 .name = "i2s uartf",
  82                 .mask = RT305X_GPIO_MODE_I2S_UARTF,
  83                 .gpio_first = RT305X_GPIO_7,
  84                 .gpio_last = RT305X_GPIO_14,
  85         }, {
  86                 .name = "pcm gpio",
  87                 .mask = RT305X_GPIO_MODE_PCM_GPIO,
  88                 .gpio_first = RT305X_GPIO_10,
  89                 .gpio_last = RT305X_GPIO_14,
  90         }, {
  91                 .name = "gpio uartf",
  92                 .mask = RT305X_GPIO_MODE_GPIO_UARTF,
  93                 .gpio_first = RT305X_GPIO_7,
  94                 .gpio_last = RT305X_GPIO_10,
  95         }, {
  96                 .name = "gpio i2s",
  97                 .mask = RT305X_GPIO_MODE_GPIO_I2S,
  98                 .gpio_first = RT305X_GPIO_7,
  99                 .gpio_last = RT305X_GPIO_10,
 100         }, {
 101                 .name = "gpio",
 102                 .mask = RT305X_GPIO_MODE_GPIO,
 103         }, {0}
 104 };
 105
 106 static void rt305x_wdt_reset(void)
 107 {
 108         u32 t;
 109
 110         /* enable WDT reset output on pin SRAM_CS_N */
 111         t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
 112         t |= RT305X_SYSCFG_SRAM_CS0_MODE_WDT <<
 113                 RT305X_SYSCFG_SRAM_CS0_MODE_SHIFT;
 114         rt_sysc_w32(t, SYSC_REG_SYSTEM_CONFIG);
 115 }
 116
 117 struct ralink_pinmux rt_gpio_pinmux = {
 118         .mode = mode_mux,
 119         .uart = uart_mux,
 120         .uart_shift = RT305X_GPIO_MODE_UART0_SHIFT,
 121         .uart_mask = RT305X_GPIO_MODE_UART0_MASK,
 122         .wdt_reset = rt305x_wdt_reset,
 123 };
 124
 125 static unsigned long rt5350_get_mem_size(void)
 126 {
 127         void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE);
 128         unsigned long ret;
 129         u32 t;
 130
 131         t = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG);
 132         t = (t >> RT5350_SYSCFG0_DRAM_SIZE_SHIFT) &
 133                 RT5350_SYSCFG0_DRAM_SIZE_MASK;
 134
 135         switch (t) {
 136         case RT5350_SYSCFG0_DRAM_SIZE_2M:
 137                 ret = 2;
 138                 break;
 139         case RT5350_SYSCFG0_DRAM_SIZE_8M:
 140                 ret = 8;
 141                 break;
 142         case RT5350_SYSCFG0_DRAM_SIZE_16M:
 143                 ret = 16;
 144                 break;
 145         case RT5350_SYSCFG0_DRAM_SIZE_32M:
 146                 ret = 32;
 147                 break;
 148         case RT5350_SYSCFG0_DRAM_SIZE_64M:
 149                 ret = 64;
 150                 break;
 151         default:
 152                 panic("rt5350: invalid DRAM size: %u", t);
 153                 break;
 154         }
 155
 156         return ret;
 157 }
 158
 159 void __init ralink_clk_init(void)
 160 {
 161         unsigned long cpu_rate, sys_rate, wdt_rate, uart_rate;
 162         unsigned long wmac_rate = 40000000;
 163
 164         u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
 165
 166         if (soc_is_rt305x() || soc_is_rt3350()) {
 167                 t = (t >> RT305X_SYSCFG_CPUCLK_SHIFT) &
 168                      RT305X_SYSCFG_CPUCLK_MASK;
 169                 switch (t) {
 170                 case RT305X_SYSCFG_CPUCLK_LOW:
 171                         cpu_rate = 320000000;
 172                         break;
 173                 case RT305X_SYSCFG_CPUCLK_HIGH:
 174                         cpu_rate = 384000000;
 175                         break;
 176                 }
 177                 sys_rate = uart_rate = wdt_rate = cpu_rate / 3;
 178         } else if (soc_is_rt3352()) {
 179                 t = (t >> RT3352_SYSCFG0_CPUCLK_SHIFT) &
 180                      RT3352_SYSCFG0_CPUCLK_MASK;
 181                 switch (t) {
 182                 case RT3352_SYSCFG0_CPUCLK_LOW:
 183                         cpu_rate = 384000000;
 184                         break;
 185                 case RT3352_SYSCFG0_CPUCLK_HIGH:
 186                         cpu_rate = 400000000;
 187                         break;
 188                 }
 189                 sys_rate = wdt_rate = cpu_rate / 3;
 190                 uart_rate = 40000000;
 191         } else if (soc_is_rt5350()) {
 192                 t = (t >> RT5350_SYSCFG0_CPUCLK_SHIFT) &
 193                      RT5350_SYSCFG0_CPUCLK_MASK;
 194                 switch (t) {
 195                 case RT5350_SYSCFG0_CPUCLK_360:
 196                         cpu_rate = 360000000;
 197                         sys_rate = cpu_rate / 3;
 198                         break;
 199                 case RT5350_SYSCFG0_CPUCLK_320:
 200                         cpu_rate = 320000000;
 201                         sys_rate = cpu_rate / 4;
 202                         break;
 203                 case RT5350_SYSCFG0_CPUCLK_300:
 204                         cpu_rate = 300000000;
 205                         sys_rate = cpu_rate / 3;
 206                         break;
 207                 default:
 208                         BUG();
 209                 }
 210                 uart_rate = 40000000;
 211                 wdt_rate = sys_rate;
 212         } else {
 213                 BUG();
 214         }
 215
 216         if (soc_is_rt3352() || soc_is_rt5350()) {
 217                 u32 val = rt_sysc_r32(RT3352_SYSC_REG_SYSCFG0);
 218
 219                 if (!(val & RT3352_CLKCFG0_XTAL_SEL))
 220                         wmac_rate = 20000000;
 221         }
 222
 223         ralink_clk_add("cpu", cpu_rate);
 224         ralink_clk_add("10000b00.spi", sys_rate);
 225         ralink_clk_add("10000100.timer", wdt_rate);
 226         ralink_clk_add("10000120.watchdog", wdt_rate);
 227         ralink_clk_add("10000500.uart", uart_rate);
 228         ralink_clk_add("10000c00.uartlite", uart_rate);
 229         ralink_clk_add("10100000.ethernet", sys_rate);
 230         ralink_clk_add("10180000.wmac", wmac_rate);
 231 }
 232
 233 void __init ralink_of_remap(void)
 234 {
 235         rt_sysc_membase = plat_of_remap_node("ralink,rt3050-sysc");
 236         rt_memc_membase = plat_of_remap_node("ralink,rt3050-memc");
 237
 238         if (!rt_sysc_membase || !rt_memc_membase)
 239                 panic("Failed to remap core resources");
 240 }
 241
 242 void prom_soc_init(struct ralink_soc_info *soc_info)
 243 {
 244         void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE);
 245         unsigned char *name;
 246         u32 n0;
 247         u32 n1;
 248         u32 id;
 249
 250         n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
 251         n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
 252
 253         if (n0 == RT3052_CHIP_NAME0 && n1 == RT3052_CHIP_NAME1) {
 254                 unsigned long icache_sets;
 255
 256                 icache_sets = (read_c0_config1() >> 22) & 7;
 257                 if (icache_sets == 1) {
 258                         rt305x_soc = RT305X_SOC_RT3050;
 259                         name = "RT3050";
 260                         soc_info->compatible = "ralink,rt3050-soc";
 261                 } else {
 262                         rt305x_soc = RT305X_SOC_RT3052;
 263                         name = "RT3052";
 264                         soc_info->compatible = "ralink,rt3052-soc";
 265                 }
 266         } else if (n0 == RT3350_CHIP_NAME0 && n1 == RT3350_CHIP_NAME1) {
 267                 rt305x_soc = RT305X_SOC_RT3350;
 268                 name = "RT3350";
 269                 soc_info->compatible = "ralink,rt3350-soc";
 270         } else if (n0 == RT3352_CHIP_NAME0 && n1 == RT3352_CHIP_NAME1) {
 271                 rt305x_soc = RT305X_SOC_RT3352;
 272                 name = "RT3352";
 273                 soc_info->compatible = "ralink,rt3352-soc";
 274         } else if (n0 == RT5350_CHIP_NAME0 && n1 == RT5350_CHIP_NAME1) {
 275                 rt305x_soc = RT305X_SOC_RT5350;
 276                 name = "RT5350";
 277                 soc_info->compatible = "ralink,rt5350-soc";
 278         } else {
 279                 panic("rt305x: unknown SoC, n0:%08x n1:%08x", n0, n1);
 280         }
 281
 282         id = __raw_readl(sysc + SYSC_REG_CHIP_ID);
 283
 284         snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
 285                 "Ralink %s id:%u rev:%u",
 286                 name,
 287                 (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
 288                 (id & CHIP_ID_REV_MASK));
 289
 290         soc_info->mem_base = RT305X_SDRAM_BASE;
 291         if (soc_is_rt5350()) {
 292                 soc_info->mem_size = rt5350_get_mem_size();
 293         } else if (soc_is_rt305x() || soc_is_rt3350()) {
 294                 soc_info->mem_size_min = RT305X_MEM_SIZE_MIN;
 295                 soc_info->mem_size_max = RT305X_MEM_SIZE_MAX;
 296         } else if (soc_is_rt3352()) {
 297                 soc_info->mem_size_min = RT3352_MEM_SIZE_MIN;
 298                 soc_info->mem_size_max = RT3352_MEM_SIZE_MAX;
 299         }
 300 }