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/io.h>
  18 #include <linux/memblock.h>
  19 #include <linux/err.h>
  20 #include <linux/clk.h>
  21 #include <linux/clk-provider.h>
  22 #include <linux/of_fdt.h>
  23 #include <linux/irqchip.h>
  24
  25 #include <asm/bootinfo.h>
  26 #include <asm/idle.h>
  27 #include <asm/time.h>           /* for mips_hpt_frequency */
  28 #include <asm/reboot.h>         /* for _machine_{restart,halt} */
  29 #include <asm/mips_machine.h>
  30 #include <asm/prom.h>
  31 #include <asm/fw/fw.h>
  32
  33 #include <asm/mach-ath79/ath79.h>
  34 #include <asm/mach-ath79/ar71xx_regs.h>
  35 #include "common.h"
  36
  37 #define ATH79_SYS_TYPE_LEN      64
  38
  39 static char ath79_sys_type[ATH79_SYS_TYPE_LEN];
  40
  41 static void ath79_restart(char *command)
  42 {
  43         local_irq_disable();
  44         ath79_device_reset_set(AR71XX_RESET_FULL_CHIP);
  45         for (;;)
  46                 if (cpu_wait)
  47                         cpu_wait();
  48 }
  49
  50 static void ath79_halt(void)
  51 {
  52         while (1)
  53                 cpu_wait();
  54 }
  55
  56 static void __init ath79_detect_sys_type(void)
  57 {
  58         char *chip = "????";
  59         u32 id;
  60         u32 major;
  61         u32 minor;
  62         u32 rev = 0;
  63         u32 ver = 1;
  64
  65         id = ath79_reset_rr(AR71XX_RESET_REG_REV_ID);
  66         major = id & REV_ID_MAJOR_MASK;
  67
  68         switch (major) {
  69         case REV_ID_MAJOR_AR71XX:
  70                 minor = id & AR71XX_REV_ID_MINOR_MASK;
  71                 rev = id >> AR71XX_REV_ID_REVISION_SHIFT;
  72                 rev &= AR71XX_REV_ID_REVISION_MASK;
  73                 switch (minor) {
  74                 case AR71XX_REV_ID_MINOR_AR7130:
  75                         ath79_soc = ATH79_SOC_AR7130;
  76                         chip = "7130";
  77                         break;
  78
  79                 case AR71XX_REV_ID_MINOR_AR7141:
  80                         ath79_soc = ATH79_SOC_AR7141;
  81                         chip = "7141";
  82                         break;
  83
  84                 case AR71XX_REV_ID_MINOR_AR7161:
  85                         ath79_soc = ATH79_SOC_AR7161;
  86                         chip = "7161";
  87                         break;
  88                 }
  89                 break;
  90
  91         case REV_ID_MAJOR_AR7240:
  92                 ath79_soc = ATH79_SOC_AR7240;
  93                 chip = "7240";
  94                 rev = id & AR724X_REV_ID_REVISION_MASK;
  95                 break;
  96
  97         case REV_ID_MAJOR_AR7241:
  98                 ath79_soc = ATH79_SOC_AR7241;
  99                 chip = "7241";
 100                 rev = id & AR724X_REV_ID_REVISION_MASK;
 101                 break;
 102
 103         case REV_ID_MAJOR_AR7242:
 104                 ath79_soc = ATH79_SOC_AR7242;
 105                 chip = "7242";
 106                 rev = id & AR724X_REV_ID_REVISION_MASK;
 107                 break;
 108
 109         case REV_ID_MAJOR_AR913X:
 110                 minor = id & AR913X_REV_ID_MINOR_MASK;
 111                 rev = id >> AR913X_REV_ID_REVISION_SHIFT;
 112                 rev &= AR913X_REV_ID_REVISION_MASK;
 113                 switch (minor) {
 114                 case AR913X_REV_ID_MINOR_AR9130:
 115                         ath79_soc = ATH79_SOC_AR9130;
 116                         chip = "9130";
 117                         break;
 118
 119                 case AR913X_REV_ID_MINOR_AR9132:
 120                         ath79_soc = ATH79_SOC_AR9132;
 121                         chip = "9132";
 122                         break;
 123                 }
 124                 break;
 125
 126         case REV_ID_MAJOR_AR9330:
 127                 ath79_soc = ATH79_SOC_AR9330;
 128                 chip = "9330";
 129                 rev = id & AR933X_REV_ID_REVISION_MASK;
 130                 break;
 131
 132         case REV_ID_MAJOR_AR9331:
 133                 ath79_soc = ATH79_SOC_AR9331;
 134                 chip = "9331";
 135                 rev = id & AR933X_REV_ID_REVISION_MASK;
 136                 break;
 137
 138         case REV_ID_MAJOR_AR9341:
 139                 ath79_soc = ATH79_SOC_AR9341;
 140                 chip = "9341";
 141                 rev = id & AR934X_REV_ID_REVISION_MASK;
 142                 break;
 143
 144         case REV_ID_MAJOR_AR9342:
 145                 ath79_soc = ATH79_SOC_AR9342;
 146                 chip = "9342";
 147                 rev = id & AR934X_REV_ID_REVISION_MASK;
 148                 break;
 149
 150         case REV_ID_MAJOR_AR9344:
 151                 ath79_soc = ATH79_SOC_AR9344;
 152                 chip = "9344";
 153                 rev = id & AR934X_REV_ID_REVISION_MASK;
 154                 break;
 155
 156         case REV_ID_MAJOR_QCA9533_V2:
 157                 ver = 2;
 158                 ath79_soc_rev = 2;
 159                 /* drop through */
 160
 161         case REV_ID_MAJOR_QCA9533:
 162                 ath79_soc = ATH79_SOC_QCA9533;
 163                 chip = "9533";
 164                 rev = id & QCA953X_REV_ID_REVISION_MASK;
 165                 break;
 166
 167         case REV_ID_MAJOR_QCA9556:
 168                 ath79_soc = ATH79_SOC_QCA9556;
 169                 chip = "9556";
 170                 rev = id & QCA955X_REV_ID_REVISION_MASK;
 171                 break;
 172
 173         case REV_ID_MAJOR_QCA9558:
 174                 ath79_soc = ATH79_SOC_QCA9558;
 175                 chip = "9558";
 176                 rev = id & QCA955X_REV_ID_REVISION_MASK;
 177                 break;
 178
 179         case REV_ID_MAJOR_QCA956X:
 180                 ath79_soc = ATH79_SOC_QCA956X;
 181                 chip = "956X";
 182                 rev = id & QCA956X_REV_ID_REVISION_MASK;
 183                 break;
 184
 185         case REV_ID_MAJOR_TP9343:
 186                 ath79_soc = ATH79_SOC_TP9343;
 187                 chip = "9343";
 188                 rev = id & QCA956X_REV_ID_REVISION_MASK;
 189                 break;
 190
 191         default:
 192                 panic("ath79: unknown SoC, id:0x%08x", id);
 193         }
 194
 195         if (ver == 1)
 196                 ath79_soc_rev = rev;
 197
 198         if (soc_is_qca953x() || soc_is_qca955x() || soc_is_qca956x())
 199                 sprintf(ath79_sys_type, "Qualcomm Atheros QCA%s ver %u rev %u",
 200                         chip, ver, rev);
 201         else if (soc_is_tp9343())
 202                 sprintf(ath79_sys_type, "Qualcomm Atheros TP%s rev %u",
 203                         chip, rev);
 204         else
 205                 sprintf(ath79_sys_type, "Atheros AR%s rev %u", chip, rev);
 206         pr_info("SoC: %s\n", ath79_sys_type);
 207 }
 208
 209 const char *get_system_type(void)
 210 {
 211         return ath79_sys_type;
 212 }
 213
 214 unsigned int get_c0_compare_int(void)
 215 {
 216         return CP0_LEGACY_COMPARE_IRQ;
 217 }
 218
 219 void __init plat_mem_setup(void)
 220 {
 221         unsigned long fdt_start;
 222
 223         set_io_port_base(KSEG1);
 224
 225         /* Get the position of the FDT passed by the bootloader */
 226         fdt_start = fw_getenvl("fdt_start");
 227         if (fdt_start)
 228                 __dt_setup_arch((void *)KSEG0ADDR(fdt_start));
 229         else if (fw_passed_dtb)
 230                 __dt_setup_arch((void *)KSEG0ADDR(fw_passed_dtb));
 231
 232         ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE,
 233                                            AR71XX_RESET_SIZE);
 234         ath79_pll_base = ioremap_nocache(AR71XX_PLL_BASE,
 235                                          AR71XX_PLL_SIZE);
 236         ath79_detect_sys_type();
 237         ath79_ddr_ctrl_init();
 238
 239         detect_memory_region(0, ATH79_MEM_SIZE_MIN, ATH79_MEM_SIZE_MAX);
 240
 241         _machine_restart = ath79_restart;
 242         _machine_halt = ath79_halt;
 243         pm_power_off = ath79_halt;
 244 }
 245
 246 void __init plat_time_init(void)
 247 {
 248         struct device_node *np;
 249         struct clk *clk;
 250         unsigned long cpu_clk_rate;
 251
 252         of_clk_init(NULL);
 253
 254         np = of_get_cpu_node(0, NULL);
 255         if (!np) {
 256                 pr_err("Failed to get CPU node\n");
 257                 return;
 258         }
 259
 260         clk = of_clk_get(np, 0);
 261         if (IS_ERR(clk)) {
 262                 pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
 263                 return;
 264         }
 265
 266         cpu_clk_rate = clk_get_rate(clk);
 267
 268         pr_info("CPU clock: %lu.%03lu MHz\n",
 269                 cpu_clk_rate / 1000000, (cpu_clk_rate / 1000) % 1000);
 270
 271         mips_hpt_frequency = cpu_clk_rate / 2;
 272
 273         clk_put(clk);
 274 }
 275
 276 void __init arch_init_irq(void)
 277 {
 278         irqchip_init();
 279 }
 280
 281 void __init device_tree_init(void)
 282 {
 283         unflatten_and_copy_device_tree();
 284 }