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/clk-provider.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 static char ath79_sys_type[ATH79_SYS_TYPE_LEN];
  40
  41 static void ath79_restart(char *command)
  42 {
  43         ath79_device_reset_set(AR71XX_RESET_FULL_CHIP);
  44         for (;;)
  45                 if (cpu_wait)
  46                         cpu_wait();
  47 }
  48
  49 static void ath79_halt(void)
  50 {
  51         while (1)
  52                 cpu_wait();
  53 }
  54
  55 static void __init ath79_detect_sys_type(void)
  56 {
  57         char *chip = "????";
  58         u32 id;
  59         u32 major;
  60         u32 minor;
  61         u32 rev = 0;
  62
  63         id = ath79_reset_rr(AR71XX_RESET_REG_REV_ID);
  64         major = id & REV_ID_MAJOR_MASK;
  65
  66         switch (major) {
  67         case REV_ID_MAJOR_AR71XX:
  68                 minor = id & AR71XX_REV_ID_MINOR_MASK;
  69                 rev = id >> AR71XX_REV_ID_REVISION_SHIFT;
  70                 rev &= AR71XX_REV_ID_REVISION_MASK;
  71                 switch (minor) {
  72                 case AR71XX_REV_ID_MINOR_AR7130:
  73                         ath79_soc = ATH79_SOC_AR7130;
  74                         chip = "7130";
  75                         break;
  76
  77                 case AR71XX_REV_ID_MINOR_AR7141:
  78                         ath79_soc = ATH79_SOC_AR7141;
  79                         chip = "7141";
  80                         break;
  81
  82                 case AR71XX_REV_ID_MINOR_AR7161:
  83                         ath79_soc = ATH79_SOC_AR7161;
  84                         chip = "7161";
  85                         break;
  86                 }
  87                 break;
  88
  89         case REV_ID_MAJOR_AR7240:
  90                 ath79_soc = ATH79_SOC_AR7240;
  91                 chip = "7240";
  92                 rev = id & AR724X_REV_ID_REVISION_MASK;
  93                 break;
  94
  95         case REV_ID_MAJOR_AR7241:
  96                 ath79_soc = ATH79_SOC_AR7241;
  97                 chip = "7241";
  98                 rev = id & AR724X_REV_ID_REVISION_MASK;
  99                 break;
 100
 101         case REV_ID_MAJOR_AR7242:
 102                 ath79_soc = ATH79_SOC_AR7242;
 103                 chip = "7242";
 104                 rev = id & AR724X_REV_ID_REVISION_MASK;
 105                 break;
 106
 107         case REV_ID_MAJOR_AR913X:
 108                 minor = id & AR913X_REV_ID_MINOR_MASK;
 109                 rev = id >> AR913X_REV_ID_REVISION_SHIFT;
 110                 rev &= AR913X_REV_ID_REVISION_MASK;
 111                 switch (minor) {
 112                 case AR913X_REV_ID_MINOR_AR9130:
 113                         ath79_soc = ATH79_SOC_AR9130;
 114                         chip = "9130";
 115                         break;
 116
 117                 case AR913X_REV_ID_MINOR_AR9132:
 118                         ath79_soc = ATH79_SOC_AR9132;
 119                         chip = "9132";
 120                         break;
 121                 }
 122                 break;
 123
 124         case REV_ID_MAJOR_AR9330:
 125                 ath79_soc = ATH79_SOC_AR9330;
 126                 chip = "9330";
 127                 rev = id & AR933X_REV_ID_REVISION_MASK;
 128                 break;
 129
 130         case REV_ID_MAJOR_AR9331:
 131                 ath79_soc = ATH79_SOC_AR9331;
 132                 chip = "9331";
 133                 rev = id & AR933X_REV_ID_REVISION_MASK;
 134                 break;
 135
 136         case REV_ID_MAJOR_AR9341:
 137                 ath79_soc = ATH79_SOC_AR9341;
 138                 chip = "9341";
 139                 rev = id & AR934X_REV_ID_REVISION_MASK;
 140                 break;
 141
 142         case REV_ID_MAJOR_AR9342:
 143                 ath79_soc = ATH79_SOC_AR9342;
 144                 chip = "9342";
 145                 rev = id & AR934X_REV_ID_REVISION_MASK;
 146                 break;
 147
 148         case REV_ID_MAJOR_AR9344:
 149                 ath79_soc = ATH79_SOC_AR9344;
 150                 chip = "9344";
 151                 rev = id & AR934X_REV_ID_REVISION_MASK;
 152                 break;
 153
 154         case REV_ID_MAJOR_QCA9556:
 155                 ath79_soc = ATH79_SOC_QCA9556;
 156                 chip = "9556";
 157                 rev = id & QCA955X_REV_ID_REVISION_MASK;
 158                 break;
 159
 160         case REV_ID_MAJOR_QCA9558:
 161                 ath79_soc = ATH79_SOC_QCA9558;
 162                 chip = "9558";
 163                 rev = id & QCA955X_REV_ID_REVISION_MASK;
 164                 break;
 165
 166         default:
 167                 panic("ath79: unknown SoC, id:0x%08x", id);
 168         }
 169
 170         ath79_soc_rev = rev;
 171
 172         if (soc_is_qca955x())
 173                 sprintf(ath79_sys_type, "Qualcomm Atheros QCA%s rev %u",
 174                         chip, rev);
 175         else
 176                 sprintf(ath79_sys_type, "Atheros AR%s rev %u", chip, rev);
 177         pr_info("SoC: %s\n", ath79_sys_type);
 178 }
 179
 180 const char *get_system_type(void)
 181 {
 182         return ath79_sys_type;
 183 }
 184
 185 int get_c0_perfcount_int(void)
 186 {
 187         return ATH79_MISC_IRQ(5);
 188 }
 189 EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
 190
 191 unsigned int get_c0_compare_int(void)
 192 {
 193         return CP0_LEGACY_COMPARE_IRQ;
 194 }
 195
 196 void __init plat_mem_setup(void)
 197 {
 198         unsigned long fdt_start;
 199
 200         set_io_port_base(KSEG1);
 201
 202         /* Get the position of the FDT passed by the bootloader */
 203         fdt_start = fw_getenvl("fdt_start");
 204         if (fdt_start)
 205                 __dt_setup_arch((void *)KSEG0ADDR(fdt_start));
 206         else if (fw_passed_dtb)
 207                 __dt_setup_arch((void *)KSEG0ADDR(fw_passed_dtb));
 208
 209         if (mips_machtype != ATH79_MACH_GENERIC_OF) {
 210                 ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE,
 211                                                    AR71XX_RESET_SIZE);
 212                 ath79_pll_base = ioremap_nocache(AR71XX_PLL_BASE,
 213                                                  AR71XX_PLL_SIZE);
 214                 ath79_detect_sys_type();
 215                 ath79_ddr_ctrl_init();
 216
 217                 detect_memory_region(0, ATH79_MEM_SIZE_MIN, ATH79_MEM_SIZE_MAX);
 218
 219                 /* OF machines should use the reset driver */
 220                 _machine_restart = ath79_restart;
 221         }
 222
 223         _machine_halt = ath79_halt;
 224         pm_power_off = ath79_halt;
 225 }
 226
 227 static void __init ath79_of_plat_time_init(void)
 228 {
 229         struct device_node *np;
 230         struct clk *clk;
 231         unsigned long cpu_clk_rate;
 232
 233         of_clk_init(NULL);
 234
 235         np = of_get_cpu_node(0, NULL);
 236         if (!np) {
 237                 pr_err("Failed to get CPU node\n");
 238                 return;
 239         }
 240
 241         clk = of_clk_get(np, 0);
 242         if (IS_ERR(clk)) {
 243                 pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
 244                 return;
 245         }
 246
 247         cpu_clk_rate = clk_get_rate(clk);
 248
 249         pr_info("CPU clock: %lu.%03lu MHz\n",
 250                 cpu_clk_rate / 1000000, (cpu_clk_rate / 1000) % 1000);
 251
 252         mips_hpt_frequency = cpu_clk_rate / 2;
 253
 254         clk_put(clk);
 255 }
 256
 257 void __init plat_time_init(void)
 258 {
 259         unsigned long cpu_clk_rate;
 260         unsigned long ahb_clk_rate;
 261         unsigned long ddr_clk_rate;
 262         unsigned long ref_clk_rate;
 263
 264         if (IS_ENABLED(CONFIG_OF) && mips_machtype == ATH79_MACH_GENERIC_OF) {
 265                 ath79_of_plat_time_init();
 266                 return;
 267         }
 268
 269         ath79_clocks_init();
 270
 271         cpu_clk_rate = ath79_get_sys_clk_rate("cpu");
 272         ahb_clk_rate = ath79_get_sys_clk_rate("ahb");
 273         ddr_clk_rate = ath79_get_sys_clk_rate("ddr");
 274         ref_clk_rate = ath79_get_sys_clk_rate("ref");
 275
 276         pr_info("Clocks: CPU:%lu.%03luMHz, DDR:%lu.%03luMHz, AHB:%lu.%03luMHz, Ref:%lu.%03luMHz\n",
 277                 cpu_clk_rate / 1000000, (cpu_clk_rate / 1000) % 1000,
 278                 ddr_clk_rate / 1000000, (ddr_clk_rate / 1000) % 1000,
 279                 ahb_clk_rate / 1000000, (ahb_clk_rate / 1000) % 1000,
 280                 ref_clk_rate / 1000000, (ref_clk_rate / 1000) % 1000);
 281
 282         mips_hpt_frequency = cpu_clk_rate / 2;
 283 }
 284
 285 static int __init ath79_setup(void)
 286 {
 287         if  (mips_machtype == ATH79_MACH_GENERIC_OF)
 288                 return 0;
 289
 290         ath79_gpio_init();
 291         ath79_register_uart();
 292         ath79_register_wdt();
 293
 294         mips_machine_setup();
 295
 296         return 0;
 297 }
 298
 299 arch_initcall(ath79_setup);
 300
 301 void __init device_tree_init(void)
 302 {
 303         unflatten_and_copy_device_tree();
 304 }
 305
 306 MIPS_MACHINE(ATH79_MACH_GENERIC,
 307              "Generic",
 308              "Generic AR71XX/AR724X/AR913X based board",
 309              NULL);
 310
 311 MIPS_MACHINE(ATH79_MACH_GENERIC_OF,
 312              "DTB",
 313              "Generic AR71XX/AR724X/AR913X based board (DT)",
 314              NULL);