arch/mips/ath79/setup.c

   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_detect_sys_type();
 220         ath79_ddr_ctrl_init();
 221
 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
 285 MIPS_MACHINE(ATH79_MACH_GENERIC_OF,
 286              "DTB",
 287              "Generic AR71XX/AR724X/AR913X based board (DT)",
 288              NULL);