arch/mips/ath79/setup.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Atheros AR71XX/AR724X/AR913X specific setup
   4  *
   5  *  Copyright (C) 2010-2011 Jaiganesh Narayanan <[email protected]>
   6  *  Copyright (C) 2008-2011 Gabor Juhos <[email protected]>
   7  *  Copyright (C) 2008 Imre Kaloz <[email protected]>
   8  *
   9  *  Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/io.h>
  15 #include <linux/memblock.h>
  16 #include <linux/err.h>
  17 #include <linux/clk.h>
  18 #include <linux/clk-provider.h>
  19 #include <linux/of_fdt.h>
  20 #include <linux/irqchip.h>
  21
  22 #include <asm/bootinfo.h>
  23 #include <asm/idle.h>
  24 #include <asm/time.h>           /* for mips_hpt_frequency */
  25 #include <asm/reboot.h>         /* for _machine_{restart,halt} */
  26 #include <asm/mips_machine.h>
  27 #include <asm/prom.h>
  28 #include <asm/fw/fw.h>
  29
  30 #include <asm/mach-ath79/ath79.h>
  31 #include <asm/mach-ath79/ar71xx_regs.h>
  32 #include "common.h"
  33
  34 #define ATH79_SYS_TYPE_LEN      64
  35
  36 static char ath79_sys_type[ATH79_SYS_TYPE_LEN];
  37
  38 static void ath79_restart(char *command)
  39 {
  40         local_irq_disable();
  41         ath79_device_reset_set(AR71XX_RESET_FULL_CHIP);
  42         for (;;)
  43                 if (cpu_wait)
  44                         cpu_wait();
  45 }
  46
  47 static void ath79_halt(void)
  48 {
  49         while (1)
  50                 cpu_wait();
  51 }
  52
  53 static void __init ath79_detect_sys_type(void)
  54 {
  55         char *chip = "????";
  56         u32 id;
  57         u32 major;
  58         u32 minor;
  59         u32 rev = 0;
  60         u32 ver = 1;
  61
  62         id = ath79_reset_rr(AR71XX_RESET_REG_REV_ID);
  63         major = id & REV_ID_MAJOR_MASK;
  64
  65         switch (major) {
  66         case REV_ID_MAJOR_AR71XX:
  67                 minor = id & AR71XX_REV_ID_MINOR_MASK;
  68                 rev = id >> AR71XX_REV_ID_REVISION_SHIFT;
  69                 rev &= AR71XX_REV_ID_REVISION_MASK;
  70                 switch (minor) {
  71                 case AR71XX_REV_ID_MINOR_AR7130:
  72                         ath79_soc = ATH79_SOC_AR7130;
  73                         chip = "7130";
  74                         break;
  75
  76                 case AR71XX_REV_ID_MINOR_AR7141:
  77                         ath79_soc = ATH79_SOC_AR7141;
  78                         chip = "7141";
  79                         break;
  80
  81                 case AR71XX_REV_ID_MINOR_AR7161:
  82                         ath79_soc = ATH79_SOC_AR7161;
  83                         chip = "7161";
  84                         break;
  85                 }
  86                 break;
  87
  88         case REV_ID_MAJOR_AR7240:
  89                 ath79_soc = ATH79_SOC_AR7240;
  90                 chip = "7240";
  91                 rev = id & AR724X_REV_ID_REVISION_MASK;
  92                 break;
  93
  94         case REV_ID_MAJOR_AR7241:
  95                 ath79_soc = ATH79_SOC_AR7241;
  96                 chip = "7241";
  97                 rev = id & AR724X_REV_ID_REVISION_MASK;
  98                 break;
  99
 100         case REV_ID_MAJOR_AR7242:
 101                 ath79_soc = ATH79_SOC_AR7242;
 102                 chip = "7242";
 103                 rev = id & AR724X_REV_ID_REVISION_MASK;
 104                 break;
 105
 106         case REV_ID_MAJOR_AR913X:
 107                 minor = id & AR913X_REV_ID_MINOR_MASK;
 108                 rev = id >> AR913X_REV_ID_REVISION_SHIFT;
 109                 rev &= AR913X_REV_ID_REVISION_MASK;
 110                 switch (minor) {
 111                 case AR913X_REV_ID_MINOR_AR9130:
 112                         ath79_soc = ATH79_SOC_AR9130;
 113                         chip = "9130";
 114                         break;
 115
 116                 case AR913X_REV_ID_MINOR_AR9132:
 117                         ath79_soc = ATH79_SOC_AR9132;
 118                         chip = "9132";
 119                         break;
 120                 }
 121                 break;
 122
 123         case REV_ID_MAJOR_AR9330:
 124                 ath79_soc = ATH79_SOC_AR9330;
 125                 chip = "9330";
 126                 rev = id & AR933X_REV_ID_REVISION_MASK;
 127                 break;
 128
 129         case REV_ID_MAJOR_AR9331:
 130                 ath79_soc = ATH79_SOC_AR9331;
 131                 chip = "9331";
 132                 rev = id & AR933X_REV_ID_REVISION_MASK;
 133                 break;
 134
 135         case REV_ID_MAJOR_AR9341:
 136                 ath79_soc = ATH79_SOC_AR9341;
 137                 chip = "9341";
 138                 rev = id & AR934X_REV_ID_REVISION_MASK;
 139                 break;
 140
 141         case REV_ID_MAJOR_AR9342:
 142                 ath79_soc = ATH79_SOC_AR9342;
 143                 chip = "9342";
 144                 rev = id & AR934X_REV_ID_REVISION_MASK;
 145                 break;
 146
 147         case REV_ID_MAJOR_AR9344:
 148                 ath79_soc = ATH79_SOC_AR9344;
 149                 chip = "9344";
 150                 rev = id & AR934X_REV_ID_REVISION_MASK;
 151                 break;
 152
 153         case REV_ID_MAJOR_QCA9533_V2:
 154                 ver = 2;
 155                 ath79_soc_rev = 2;
 156                 /* drop through */
 157
 158         case REV_ID_MAJOR_QCA9533:
 159                 ath79_soc = ATH79_SOC_QCA9533;
 160                 chip = "9533";
 161                 rev = id & QCA953X_REV_ID_REVISION_MASK;
 162                 break;
 163
 164         case REV_ID_MAJOR_QCA9556:
 165                 ath79_soc = ATH79_SOC_QCA9556;
 166                 chip = "9556";
 167                 rev = id & QCA955X_REV_ID_REVISION_MASK;
 168                 break;
 169
 170         case REV_ID_MAJOR_QCA9558:
 171                 ath79_soc = ATH79_SOC_QCA9558;
 172                 chip = "9558";
 173                 rev = id & QCA955X_REV_ID_REVISION_MASK;
 174                 break;
 175
 176         case REV_ID_MAJOR_QCA956X:
 177                 ath79_soc = ATH79_SOC_QCA956X;
 178                 chip = "956X";
 179                 rev = id & QCA956X_REV_ID_REVISION_MASK;
 180                 break;
 181
 182         case REV_ID_MAJOR_TP9343:
 183                 ath79_soc = ATH79_SOC_TP9343;
 184                 chip = "9343";
 185                 rev = id & QCA956X_REV_ID_REVISION_MASK;
 186                 break;
 187
 188         default:
 189                 panic("ath79: unknown SoC, id:0x%08x", id);
 190         }
 191
 192         if (ver == 1)
 193                 ath79_soc_rev = rev;
 194
 195         if (soc_is_qca953x() || soc_is_qca955x() || soc_is_qca956x())
 196                 sprintf(ath79_sys_type, "Qualcomm Atheros QCA%s ver %u rev %u",
 197                         chip, ver, rev);
 198         else if (soc_is_tp9343())
 199                 sprintf(ath79_sys_type, "Qualcomm Atheros TP%s rev %u",
 200                         chip, rev);
 201         else
 202                 sprintf(ath79_sys_type, "Atheros AR%s rev %u", chip, rev);
 203         pr_info("SoC: %s\n", ath79_sys_type);
 204 }
 205
 206 const char *get_system_type(void)
 207 {
 208         return ath79_sys_type;
 209 }
 210
 211 unsigned int get_c0_compare_int(void)
 212 {
 213         return CP0_LEGACY_COMPARE_IRQ;
 214 }
 215
 216 void __init plat_mem_setup(void)
 217 {
 218         unsigned long fdt_start;
 219
 220         set_io_port_base(KSEG1);
 221
 222         /* Get the position of the FDT passed by the bootloader */
 223         fdt_start = fw_getenvl("fdt_start");
 224         if (fdt_start)
 225                 __dt_setup_arch((void *)KSEG0ADDR(fdt_start));
 226         else if (fw_passed_dtb)
 227                 __dt_setup_arch((void *)KSEG0ADDR(fw_passed_dtb));
 228
 229         ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE,
 230                                            AR71XX_RESET_SIZE);
 231         ath79_pll_base = ioremap_nocache(AR71XX_PLL_BASE,
 232                                          AR71XX_PLL_SIZE);
 233         ath79_detect_sys_type();
 234         ath79_ddr_ctrl_init();
 235
 236         detect_memory_region(0, ATH79_MEM_SIZE_MIN, ATH79_MEM_SIZE_MAX);
 237
 238         _machine_restart = ath79_restart;
 239         _machine_halt = ath79_halt;
 240         pm_power_off = ath79_halt;
 241 }
 242
 243 void __init plat_time_init(void)
 244 {
 245         struct device_node *np;
 246         struct clk *clk;
 247         unsigned long cpu_clk_rate;
 248
 249         of_clk_init(NULL);
 250
 251         np = of_get_cpu_node(0, NULL);
 252         if (!np) {
 253                 pr_err("Failed to get CPU node\n");
 254                 return;
 255         }
 256
 257         clk = of_clk_get(np, 0);
 258         if (IS_ERR(clk)) {
 259                 pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
 260                 return;
 261         }
 262
 263         cpu_clk_rate = clk_get_rate(clk);
 264
 265         pr_info("CPU clock: %lu.%03lu MHz\n",
 266                 cpu_clk_rate / 1000000, (cpu_clk_rate / 1000) % 1000);
 267
 268         mips_hpt_frequency = cpu_clk_rate / 2;
 269
 270         clk_put(clk);
 271 }
 272
 273 void __init arch_init_irq(void)
 274 {
 275         irqchip_init();
 276 }
 277
 278 void __init device_tree_init(void)
 279 {
 280         unflatten_and_copy_device_tree();
 281 }