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 #include <asm/mach-ralink/pinmux.h> 21 22 #include "common.h" 23 24 static struct rt2880_pmx_func i2c_func[] = { FUNC("i2c", 0, 1, 2) }; 25 static struct rt2880_pmx_func spi_func[] = { FUNC("spi", 0, 3, 4) }; 26 static struct rt2880_pmx_func uartf_func[] = { 27 FUNC("uartf", RT305X_GPIO_MODE_UARTF, 7, 8), 28 FUNC("pcm uartf", RT305X_GPIO_MODE_PCM_UARTF, 7, 8), 29 FUNC("pcm i2s", RT305X_GPIO_MODE_PCM_I2S, 7, 8), 30 FUNC("i2s uartf", RT305X_GPIO_MODE_I2S_UARTF, 7, 8), 31 FUNC("pcm gpio", RT305X_GPIO_MODE_PCM_GPIO, 11, 4), 32 FUNC("gpio uartf", RT305X_GPIO_MODE_GPIO_UARTF, 7, 4), 33 FUNC("gpio i2s", RT305X_GPIO_MODE_GPIO_I2S, 7, 4), 34 }; 35 static struct rt2880_pmx_func uartlite_func[] = { FUNC("uartlite", 0, 15, 2) }; 36 static struct rt2880_pmx_func jtag_func[] = { FUNC("jtag", 0, 17, 5) }; 37 static struct rt2880_pmx_func mdio_func[] = { FUNC("mdio", 0, 22, 2) }; 38 static struct rt2880_pmx_func rt5350_led_func[] = { FUNC("led", 0, 22, 5) }; 39 static struct rt2880_pmx_func rt5350_cs1_func[] = { 40 FUNC("spi_cs1", 0, 27, 1), 41 FUNC("wdg_cs1", 1, 27, 1), 42 }; 43 static struct rt2880_pmx_func sdram_func[] = { FUNC("sdram", 0, 24, 16) }; 44 static struct rt2880_pmx_func rt3352_rgmii_func[] = { 45 FUNC("rgmii", 0, 24, 12) 46 }; 47 static struct rt2880_pmx_func rgmii_func[] = { FUNC("rgmii", 0, 40, 12) }; 48 static struct rt2880_pmx_func rt3352_lna_func[] = { FUNC("lna", 0, 36, 2) }; 49 static struct rt2880_pmx_func rt3352_pa_func[] = { FUNC("pa", 0, 38, 2) }; 50 static struct rt2880_pmx_func rt3352_led_func[] = { FUNC("led", 0, 40, 5) }; 51 52 static struct rt2880_pmx_group rt3050_pinmux_data[] = { 53 GRP("i2c", i2c_func, 1, RT305X_GPIO_MODE_I2C), 54 GRP("spi", spi_func, 1, RT305X_GPIO_MODE_SPI), 55 GRP("uartf", uartf_func, RT305X_GPIO_MODE_UART0_MASK, 56 RT305X_GPIO_MODE_UART0_SHIFT), 57 GRP("uartlite", uartlite_func, 1, RT305X_GPIO_MODE_UART1), 58 GRP("jtag", jtag_func, 1, RT305X_GPIO_MODE_JTAG), 59 GRP("mdio", mdio_func, 1, RT305X_GPIO_MODE_MDIO), 60 GRP("rgmii", rgmii_func, 1, RT305X_GPIO_MODE_RGMII), 61 GRP("sdram", sdram_func, 1, RT305X_GPIO_MODE_SDRAM), 62 { 0 } 63 }; 64 65 static struct rt2880_pmx_group rt3352_pinmux_data[] = { 66 GRP("i2c", i2c_func, 1, RT305X_GPIO_MODE_I2C), 67 GRP("spi", spi_func, 1, RT305X_GPIO_MODE_SPI), 68 GRP("uartf", uartf_func, RT305X_GPIO_MODE_UART0_MASK, 69 RT305X_GPIO_MODE_UART0_SHIFT), 70 GRP("uartlite", uartlite_func, 1, RT305X_GPIO_MODE_UART1), 71 GRP("jtag", jtag_func, 1, RT305X_GPIO_MODE_JTAG), 72 GRP("mdio", mdio_func, 1, RT305X_GPIO_MODE_MDIO), 73 GRP("rgmii", rt3352_rgmii_func, 1, RT305X_GPIO_MODE_RGMII), 74 GRP("lna", rt3352_lna_func, 1, RT3352_GPIO_MODE_LNA), 75 GRP("pa", rt3352_pa_func, 1, RT3352_GPIO_MODE_PA), 76 GRP("led", rt3352_led_func, 1, RT5350_GPIO_MODE_PHY_LED), 77 { 0 } 78 }; 79 80 static struct rt2880_pmx_group rt5350_pinmux_data[] = { 81 GRP("i2c", i2c_func, 1, RT305X_GPIO_MODE_I2C), 82 GRP("spi", spi_func, 1, RT305X_GPIO_MODE_SPI), 83 GRP("uartf", uartf_func, RT305X_GPIO_MODE_UART0_MASK, 84 RT305X_GPIO_MODE_UART0_SHIFT), 85 GRP("uartlite", uartlite_func, 1, RT305X_GPIO_MODE_UART1), 86 GRP("jtag", jtag_func, 1, RT305X_GPIO_MODE_JTAG), 87 GRP("led", rt5350_led_func, 1, RT5350_GPIO_MODE_PHY_LED), 88 GRP("spi_cs1", rt5350_cs1_func, 2, RT5350_GPIO_MODE_SPI_CS1), 89 { 0 } 90 }; 91 92 static void rt305x_wdt_reset(void) 93 { 94 u32 t; 95 96 /* enable WDT reset output on pin SRAM_CS_N */ 97 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG); 98 t |= RT305X_SYSCFG_SRAM_CS0_MODE_WDT << 99 RT305X_SYSCFG_SRAM_CS0_MODE_SHIFT; 100 rt_sysc_w32(t, SYSC_REG_SYSTEM_CONFIG); 101 } 102 103 static unsigned long rt5350_get_mem_size(void) 104 { 105 void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE); 106 unsigned long ret; 107 u32 t; 108 109 t = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG); 110 t = (t >> RT5350_SYSCFG0_DRAM_SIZE_SHIFT) & 111 RT5350_SYSCFG0_DRAM_SIZE_MASK; 112 113 switch (t) { 114 case RT5350_SYSCFG0_DRAM_SIZE_2M: 115 ret = 2; 116 break; 117 case RT5350_SYSCFG0_DRAM_SIZE_8M: 118 ret = 8; 119 break; 120 case RT5350_SYSCFG0_DRAM_SIZE_16M: 121 ret = 16; 122 break; 123 case RT5350_SYSCFG0_DRAM_SIZE_32M: 124 ret = 32; 125 break; 126 case RT5350_SYSCFG0_DRAM_SIZE_64M: 127 ret = 64; 128 break; 129 default: 130 panic("rt5350: invalid DRAM size: %u", t); 131 break; 132 } 133 134 return ret; 135 } 136 137 void __init ralink_clk_init(void) 138 { 139 unsigned long cpu_rate, sys_rate, wdt_rate, uart_rate; 140 unsigned long wmac_rate = 40000000; 141 142 u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG); 143 144 if (soc_is_rt305x() || soc_is_rt3350()) { 145 t = (t >> RT305X_SYSCFG_CPUCLK_SHIFT) & 146 RT305X_SYSCFG_CPUCLK_MASK; 147 switch (t) { 148 case RT305X_SYSCFG_CPUCLK_LOW: 149 cpu_rate = 320000000; 150 break; 151 case RT305X_SYSCFG_CPUCLK_HIGH: 152 cpu_rate = 384000000; 153 break; 154 } 155 sys_rate = uart_rate = wdt_rate = cpu_rate / 3; 156 } else if (soc_is_rt3352()) { 157 t = (t >> RT3352_SYSCFG0_CPUCLK_SHIFT) & 158 RT3352_SYSCFG0_CPUCLK_MASK; 159 switch (t) { 160 case RT3352_SYSCFG0_CPUCLK_LOW: 161 cpu_rate = 384000000; 162 break; 163 case RT3352_SYSCFG0_CPUCLK_HIGH: 164 cpu_rate = 400000000; 165 break; 166 } 167 sys_rate = wdt_rate = cpu_rate / 3; 168 uart_rate = 40000000; 169 } else if (soc_is_rt5350()) { 170 t = (t >> RT5350_SYSCFG0_CPUCLK_SHIFT) & 171 RT5350_SYSCFG0_CPUCLK_MASK; 172 switch (t) { 173 case RT5350_SYSCFG0_CPUCLK_360: 174 cpu_rate = 360000000; 175 sys_rate = cpu_rate / 3; 176 break; 177 case RT5350_SYSCFG0_CPUCLK_320: 178 cpu_rate = 320000000; 179 sys_rate = cpu_rate / 4; 180 break; 181 case RT5350_SYSCFG0_CPUCLK_300: 182 cpu_rate = 300000000; 183 sys_rate = cpu_rate / 3; 184 break; 185 default: 186 BUG(); 187 } 188 uart_rate = 40000000; 189 wdt_rate = sys_rate; 190 } else { 191 BUG(); 192 } 193 194 if (soc_is_rt3352() || soc_is_rt5350()) { 195 u32 val = rt_sysc_r32(RT3352_SYSC_REG_SYSCFG0); 196 197 if (!(val & RT3352_CLKCFG0_XTAL_SEL)) 198 wmac_rate = 20000000; 199 } 200 201 ralink_clk_add("cpu", cpu_rate); 202 ralink_clk_add("sys", sys_rate); 203 ralink_clk_add("10000b00.spi", sys_rate); 204 ralink_clk_add("10000b40.spi", sys_rate); 205 ralink_clk_add("10000100.timer", wdt_rate); 206 ralink_clk_add("10000120.watchdog", wdt_rate); 207 ralink_clk_add("10000500.uart", uart_rate); 208 ralink_clk_add("10000c00.uartlite", uart_rate); 209 ralink_clk_add("10100000.ethernet", sys_rate); 210 ralink_clk_add("10180000.wmac", wmac_rate); 211 } 212 213 void __init ralink_of_remap(void) 214 { 215 rt_sysc_membase = plat_of_remap_node("ralink,rt3050-sysc"); 216 rt_memc_membase = plat_of_remap_node("ralink,rt3050-memc"); 217 218 if (!rt_sysc_membase || !rt_memc_membase) 219 panic("Failed to remap core resources"); 220 } 221 222 void prom_soc_init(struct ralink_soc_info *soc_info) 223 { 224 void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE); 225 unsigned char *name; 226 u32 n0; 227 u32 n1; 228 u32 id; 229 230 n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0); 231 n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1); 232 233 if (n0 == RT3052_CHIP_NAME0 && n1 == RT3052_CHIP_NAME1) { 234 unsigned long icache_sets; 235 236 icache_sets = (read_c0_config1() >> 22) & 7; 237 if (icache_sets == 1) { 238 ralink_soc = RT305X_SOC_RT3050; 239 name = "RT3050"; 240 soc_info->compatible = "ralink,rt3050-soc"; 241 } else { 242 ralink_soc = RT305X_SOC_RT3052; 243 name = "RT3052"; 244 soc_info->compatible = "ralink,rt3052-soc"; 245 } 246 } else if (n0 == RT3350_CHIP_NAME0 && n1 == RT3350_CHIP_NAME1) { 247 ralink_soc = RT305X_SOC_RT3350; 248 name = "RT3350"; 249 soc_info->compatible = "ralink,rt3350-soc"; 250 } else if (n0 == RT3352_CHIP_NAME0 && n1 == RT3352_CHIP_NAME1) { 251 ralink_soc = RT305X_SOC_RT3352; 252 name = "RT3352"; 253 soc_info->compatible = "ralink,rt3352-soc"; 254 } else if (n0 == RT5350_CHIP_NAME0 && n1 == RT5350_CHIP_NAME1) { 255 ralink_soc = RT305X_SOC_RT5350; 256 name = "RT5350"; 257 soc_info->compatible = "ralink,rt5350-soc"; 258 } else { 259 panic("rt305x: unknown SoC, n0:%08x n1:%08x", n0, n1); 260 } 261 262 id = __raw_readl(sysc + SYSC_REG_CHIP_ID); 263 264 snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN, 265 "Ralink %s id:%u rev:%u", 266 name, 267 (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK, 268 (id & CHIP_ID_REV_MASK)); 269 270 soc_info->mem_base = RT305X_SDRAM_BASE; 271 if (soc_is_rt5350()) { 272 soc_info->mem_size = rt5350_get_mem_size(); 273 rt2880_pinmux_data = rt5350_pinmux_data; 274 } else if (soc_is_rt305x() || soc_is_rt3350()) { 275 soc_info->mem_size_min = RT305X_MEM_SIZE_MIN; 276 soc_info->mem_size_max = RT305X_MEM_SIZE_MAX; 277 rt2880_pinmux_data = rt3050_pinmux_data; 278 } else if (soc_is_rt3352()) { 279 soc_info->mem_size_min = RT3352_MEM_SIZE_MIN; 280 soc_info->mem_size_max = RT3352_MEM_SIZE_MAX; 281 rt2880_pinmux_data = rt3352_pinmux_data; 282 } 283 } 284