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/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 } 281