1 /* 2 * Atheros AR71XX/AR724X/AR913X specific setup 3 * 4 * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com> 5 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> 6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 7 * 8 * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License version 2 as published 12 * by the Free Software Foundation. 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/init.h> 17 #include <linux/bootmem.h> 18 #include <linux/err.h> 19 #include <linux/clk.h> 20 #include <linux/of_platform.h> 21 #include <linux/of_fdt.h> 22 23 #include <asm/bootinfo.h> 24 #include <asm/idle.h> 25 #include <asm/time.h> /* for mips_hpt_frequency */ 26 #include <asm/reboot.h> /* for _machine_{restart,halt} */ 27 #include <asm/mips_machine.h> 28 #include <asm/prom.h> 29 #include <asm/fw/fw.h> 30 31 #include <asm/mach-ath79/ath79.h> 32 #include <asm/mach-ath79/ar71xx_regs.h> 33 #include "common.h" 34 #include "dev-common.h" 35 #include "machtypes.h" 36 37 #define ATH79_SYS_TYPE_LEN 64 38 39 #define AR71XX_BASE_FREQ 40000000 40 #define AR724X_BASE_FREQ 5000000 41 #define AR913X_BASE_FREQ 5000000 42 43 static char ath79_sys_type[ATH79_SYS_TYPE_LEN]; 44 45 static void ath79_restart(char *command) 46 { 47 ath79_device_reset_set(AR71XX_RESET_FULL_CHIP); 48 for (;;) 49 if (cpu_wait) 50 cpu_wait(); 51 } 52 53 static void ath79_halt(void) 54 { 55 while (1) 56 cpu_wait(); 57 } 58 59 static void __init ath79_detect_sys_type(void) 60 { 61 char *chip = "????"; 62 u32 id; 63 u32 major; 64 u32 minor; 65 u32 rev = 0; 66 67 id = ath79_reset_rr(AR71XX_RESET_REG_REV_ID); 68 major = id & REV_ID_MAJOR_MASK; 69 70 switch (major) { 71 case REV_ID_MAJOR_AR71XX: 72 minor = id & AR71XX_REV_ID_MINOR_MASK; 73 rev = id >> AR71XX_REV_ID_REVISION_SHIFT; 74 rev &= AR71XX_REV_ID_REVISION_MASK; 75 switch (minor) { 76 case AR71XX_REV_ID_MINOR_AR7130: 77 ath79_soc = ATH79_SOC_AR7130; 78 chip = "7130"; 79 break; 80 81 case AR71XX_REV_ID_MINOR_AR7141: 82 ath79_soc = ATH79_SOC_AR7141; 83 chip = "7141"; 84 break; 85 86 case AR71XX_REV_ID_MINOR_AR7161: 87 ath79_soc = ATH79_SOC_AR7161; 88 chip = "7161"; 89 break; 90 } 91 break; 92 93 case REV_ID_MAJOR_AR7240: 94 ath79_soc = ATH79_SOC_AR7240; 95 chip = "7240"; 96 rev = id & AR724X_REV_ID_REVISION_MASK; 97 break; 98 99 case REV_ID_MAJOR_AR7241: 100 ath79_soc = ATH79_SOC_AR7241; 101 chip = "7241"; 102 rev = id & AR724X_REV_ID_REVISION_MASK; 103 break; 104 105 case REV_ID_MAJOR_AR7242: 106 ath79_soc = ATH79_SOC_AR7242; 107 chip = "7242"; 108 rev = id & AR724X_REV_ID_REVISION_MASK; 109 break; 110 111 case REV_ID_MAJOR_AR913X: 112 minor = id & AR913X_REV_ID_MINOR_MASK; 113 rev = id >> AR913X_REV_ID_REVISION_SHIFT; 114 rev &= AR913X_REV_ID_REVISION_MASK; 115 switch (minor) { 116 case AR913X_REV_ID_MINOR_AR9130: 117 ath79_soc = ATH79_SOC_AR9130; 118 chip = "9130"; 119 break; 120 121 case AR913X_REV_ID_MINOR_AR9132: 122 ath79_soc = ATH79_SOC_AR9132; 123 chip = "9132"; 124 break; 125 } 126 break; 127 128 case REV_ID_MAJOR_AR9330: 129 ath79_soc = ATH79_SOC_AR9330; 130 chip = "9330"; 131 rev = id & AR933X_REV_ID_REVISION_MASK; 132 break; 133 134 case REV_ID_MAJOR_AR9331: 135 ath79_soc = ATH79_SOC_AR9331; 136 chip = "9331"; 137 rev = id & AR933X_REV_ID_REVISION_MASK; 138 break; 139 140 case REV_ID_MAJOR_AR9341: 141 ath79_soc = ATH79_SOC_AR9341; 142 chip = "9341"; 143 rev = id & AR934X_REV_ID_REVISION_MASK; 144 break; 145 146 case REV_ID_MAJOR_AR9342: 147 ath79_soc = ATH79_SOC_AR9342; 148 chip = "9342"; 149 rev = id & AR934X_REV_ID_REVISION_MASK; 150 break; 151 152 case REV_ID_MAJOR_AR9344: 153 ath79_soc = ATH79_SOC_AR9344; 154 chip = "9344"; 155 rev = id & AR934X_REV_ID_REVISION_MASK; 156 break; 157 158 case REV_ID_MAJOR_QCA9556: 159 ath79_soc = ATH79_SOC_QCA9556; 160 chip = "9556"; 161 rev = id & QCA955X_REV_ID_REVISION_MASK; 162 break; 163 164 case REV_ID_MAJOR_QCA9558: 165 ath79_soc = ATH79_SOC_QCA9558; 166 chip = "9558"; 167 rev = id & QCA955X_REV_ID_REVISION_MASK; 168 break; 169 170 default: 171 panic("ath79: unknown SoC, id:0x%08x", id); 172 } 173 174 ath79_soc_rev = rev; 175 176 if (soc_is_qca955x()) 177 sprintf(ath79_sys_type, "Qualcomm Atheros QCA%s rev %u", 178 chip, rev); 179 else 180 sprintf(ath79_sys_type, "Atheros AR%s rev %u", chip, rev); 181 pr_info("SoC: %s\n", ath79_sys_type); 182 } 183 184 const char *get_system_type(void) 185 { 186 return ath79_sys_type; 187 } 188 189 int get_c0_perfcount_int(void) 190 { 191 return ATH79_MISC_IRQ(5); 192 } 193 EXPORT_SYMBOL_GPL(get_c0_perfcount_int); 194 195 unsigned int get_c0_compare_int(void) 196 { 197 return CP0_LEGACY_COMPARE_IRQ; 198 } 199 200 void __init plat_mem_setup(void) 201 { 202 unsigned long fdt_start; 203 204 set_io_port_base(KSEG1); 205 206 /* Get the position of the FDT passed by the bootloader */ 207 fdt_start = fw_getenvl("fdt_start"); 208 if (fdt_start) 209 __dt_setup_arch((void *)KSEG0ADDR(fdt_start)); 210 #ifdef CONFIG_BUILTIN_DTB 211 else 212 __dt_setup_arch(__dtb_start); 213 #endif 214 215 ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE, 216 AR71XX_RESET_SIZE); 217 ath79_pll_base = ioremap_nocache(AR71XX_PLL_BASE, 218 AR71XX_PLL_SIZE); 219 ath79_ddr_ctrl_init(); 220 221 ath79_detect_sys_type(); 222 if (mips_machtype != ATH79_MACH_GENERIC_OF) 223 detect_memory_region(0, ATH79_MEM_SIZE_MIN, ATH79_MEM_SIZE_MAX); 224 225 _machine_restart = ath79_restart; 226 _machine_halt = ath79_halt; 227 pm_power_off = ath79_halt; 228 } 229 230 void __init plat_time_init(void) 231 { 232 unsigned long cpu_clk_rate; 233 unsigned long ahb_clk_rate; 234 unsigned long ddr_clk_rate; 235 unsigned long ref_clk_rate; 236 237 ath79_clocks_init(); 238 239 cpu_clk_rate = ath79_get_sys_clk_rate("cpu"); 240 ahb_clk_rate = ath79_get_sys_clk_rate("ahb"); 241 ddr_clk_rate = ath79_get_sys_clk_rate("ddr"); 242 ref_clk_rate = ath79_get_sys_clk_rate("ref"); 243 244 pr_info("Clocks: CPU:%lu.%03luMHz, DDR:%lu.%03luMHz, AHB:%lu.%03luMHz, Ref:%lu.%03luMHz\n", 245 cpu_clk_rate / 1000000, (cpu_clk_rate / 1000) % 1000, 246 ddr_clk_rate / 1000000, (ddr_clk_rate / 1000) % 1000, 247 ahb_clk_rate / 1000000, (ahb_clk_rate / 1000) % 1000, 248 ref_clk_rate / 1000000, (ref_clk_rate / 1000) % 1000); 249 250 mips_hpt_frequency = cpu_clk_rate / 2; 251 } 252 253 static int __init ath79_setup(void) 254 { 255 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); 256 if (mips_machtype == ATH79_MACH_GENERIC_OF) 257 return 0; 258 259 ath79_gpio_init(); 260 ath79_register_uart(); 261 ath79_register_wdt(); 262 263 mips_machine_setup(); 264 265 return 0; 266 } 267 268 arch_initcall(ath79_setup); 269 270 void __init device_tree_init(void) 271 { 272 unflatten_and_copy_device_tree(); 273 } 274 275 static void __init ath79_generic_init(void) 276 { 277 /* Nothing to do */ 278 } 279 280 MIPS_MACHINE(ATH79_MACH_GENERIC, 281 "Generic", 282 "Generic AR71XX/AR724X/AR913X based board", 283 ath79_generic_init); 284