1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Atheros AR71XX/AR724X/AR913X specific setup 4 * 5 * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com> 6 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> 7 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 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/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 fallthrough; 157 case REV_ID_MAJOR_QCA9533: 158 ath79_soc = ATH79_SOC_QCA9533; 159 chip = "9533"; 160 rev = id & QCA953X_REV_ID_REVISION_MASK; 161 break; 162 163 case REV_ID_MAJOR_QCA9556: 164 ath79_soc = ATH79_SOC_QCA9556; 165 chip = "9556"; 166 rev = id & QCA955X_REV_ID_REVISION_MASK; 167 break; 168 169 case REV_ID_MAJOR_QCA9558: 170 ath79_soc = ATH79_SOC_QCA9558; 171 chip = "9558"; 172 rev = id & QCA955X_REV_ID_REVISION_MASK; 173 break; 174 175 case REV_ID_MAJOR_QCA956X: 176 ath79_soc = ATH79_SOC_QCA956X; 177 chip = "956X"; 178 rev = id & QCA956X_REV_ID_REVISION_MASK; 179 break; 180 181 case REV_ID_MAJOR_TP9343: 182 ath79_soc = ATH79_SOC_TP9343; 183 chip = "9343"; 184 rev = id & QCA956X_REV_ID_REVISION_MASK; 185 break; 186 187 default: 188 panic("ath79: unknown SoC, id:0x%08x", id); 189 } 190 191 if (ver == 1) 192 ath79_soc_rev = rev; 193 194 if (soc_is_qca953x() || soc_is_qca955x() || soc_is_qca956x()) 195 sprintf(ath79_sys_type, "Qualcomm Atheros QCA%s ver %u rev %u", 196 chip, ver, rev); 197 else if (soc_is_tp9343()) 198 sprintf(ath79_sys_type, "Qualcomm Atheros TP%s rev %u", 199 chip, rev); 200 else 201 sprintf(ath79_sys_type, "Atheros AR%s rev %u", chip, rev); 202 pr_info("SoC: %s\n", ath79_sys_type); 203 } 204 205 const char *get_system_type(void) 206 { 207 return ath79_sys_type; 208 } 209 210 unsigned int get_c0_compare_int(void) 211 { 212 return CP0_LEGACY_COMPARE_IRQ; 213 } 214 215 void __init plat_mem_setup(void) 216 { 217 unsigned long fdt_start; 218 219 set_io_port_base(KSEG1); 220 221 /* Get the position of the FDT passed by the bootloader */ 222 fdt_start = fw_getenvl("fdt_start"); 223 if (fdt_start) 224 __dt_setup_arch((void *)KSEG0ADDR(fdt_start)); 225 else if (fw_passed_dtb) 226 __dt_setup_arch((void *)KSEG0ADDR(fw_passed_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 } 281