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