1 /* 2 * Renesas SoC Identification 3 * 4 * Copyright (C) 2014-2016 Glider bvba 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; version 2 of the License. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 */ 15 16 #include <linux/io.h> 17 #include <linux/of.h> 18 #include <linux/of_address.h> 19 #include <linux/slab.h> 20 #include <linux/string.h> 21 #include <linux/sys_soc.h> 22 23 24 struct renesas_family { 25 const char name[16]; 26 u32 reg; /* CCCR or PRR, if not in DT */ 27 }; 28 29 static const struct renesas_family fam_rcar_gen1 __initconst __maybe_unused = { 30 .name = "R-Car Gen1", 31 .reg = 0xff000044, /* PRR (Product Register) */ 32 }; 33 34 static const struct renesas_family fam_rcar_gen2 __initconst __maybe_unused = { 35 .name = "R-Car Gen2", 36 .reg = 0xff000044, /* PRR (Product Register) */ 37 }; 38 39 static const struct renesas_family fam_rcar_gen3 __initconst __maybe_unused = { 40 .name = "R-Car Gen3", 41 .reg = 0xfff00044, /* PRR (Product Register) */ 42 }; 43 44 static const struct renesas_family fam_rmobile __initconst __maybe_unused = { 45 .name = "R-Mobile", 46 .reg = 0xe600101c, /* CCCR (Common Chip Code Register) */ 47 }; 48 49 static const struct renesas_family fam_rza __initconst __maybe_unused = { 50 .name = "RZ/A", 51 }; 52 53 static const struct renesas_family fam_rzg __initconst __maybe_unused = { 54 .name = "RZ/G", 55 .reg = 0xff000044, /* PRR (Product Register) */ 56 }; 57 58 static const struct renesas_family fam_shmobile __initconst __maybe_unused = { 59 .name = "SH-Mobile", 60 .reg = 0xe600101c, /* CCCR (Common Chip Code Register) */ 61 }; 62 63 64 struct renesas_soc { 65 const struct renesas_family *family; 66 u8 id; 67 }; 68 69 static const struct renesas_soc soc_rz_a1h __initconst __maybe_unused = { 70 .family = &fam_rza, 71 }; 72 73 static const struct renesas_soc soc_rmobile_ape6 __initconst __maybe_unused = { 74 .family = &fam_rmobile, 75 .id = 0x3f, 76 }; 77 78 static const struct renesas_soc soc_rmobile_a1 __initconst __maybe_unused = { 79 .family = &fam_rmobile, 80 .id = 0x40, 81 }; 82 83 static const struct renesas_soc soc_rz_g1h __initconst __maybe_unused = { 84 .family = &fam_rzg, 85 .id = 0x45, 86 }; 87 88 static const struct renesas_soc soc_rz_g1m __initconst __maybe_unused = { 89 .family = &fam_rzg, 90 .id = 0x47, 91 }; 92 93 static const struct renesas_soc soc_rz_g1n __initconst __maybe_unused = { 94 .family = &fam_rzg, 95 .id = 0x4b, 96 }; 97 98 static const struct renesas_soc soc_rz_g1e __initconst __maybe_unused = { 99 .family = &fam_rzg, 100 .id = 0x4c, 101 }; 102 103 static const struct renesas_soc soc_rz_g1c __initconst __maybe_unused = { 104 .family = &fam_rzg, 105 .id = 0x53, 106 }; 107 108 static const struct renesas_soc soc_rcar_m1a __initconst __maybe_unused = { 109 .family = &fam_rcar_gen1, 110 }; 111 112 static const struct renesas_soc soc_rcar_h1 __initconst __maybe_unused = { 113 .family = &fam_rcar_gen1, 114 .id = 0x3b, 115 }; 116 117 static const struct renesas_soc soc_rcar_h2 __initconst __maybe_unused = { 118 .family = &fam_rcar_gen2, 119 .id = 0x45, 120 }; 121 122 static const struct renesas_soc soc_rcar_m2_w __initconst __maybe_unused = { 123 .family = &fam_rcar_gen2, 124 .id = 0x47, 125 }; 126 127 static const struct renesas_soc soc_rcar_v2h __initconst __maybe_unused = { 128 .family = &fam_rcar_gen2, 129 .id = 0x4a, 130 }; 131 132 static const struct renesas_soc soc_rcar_m2_n __initconst __maybe_unused = { 133 .family = &fam_rcar_gen2, 134 .id = 0x4b, 135 }; 136 137 static const struct renesas_soc soc_rcar_e2 __initconst __maybe_unused = { 138 .family = &fam_rcar_gen2, 139 .id = 0x4c, 140 }; 141 142 static const struct renesas_soc soc_rcar_h3 __initconst __maybe_unused = { 143 .family = &fam_rcar_gen3, 144 .id = 0x4f, 145 }; 146 147 static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = { 148 .family = &fam_rcar_gen3, 149 .id = 0x52, 150 }; 151 152 static const struct renesas_soc soc_rcar_m3_n __initconst __maybe_unused = { 153 .family = &fam_rcar_gen3, 154 .id = 0x55, 155 }; 156 157 static const struct renesas_soc soc_rcar_v3m __initconst __maybe_unused = { 158 .family = &fam_rcar_gen3, 159 .id = 0x54, 160 }; 161 162 static const struct renesas_soc soc_rcar_v3h __initconst __maybe_unused = { 163 .family = &fam_rcar_gen3, 164 .id = 0x56, 165 }; 166 167 static const struct renesas_soc soc_rcar_e3 __initconst __maybe_unused = { 168 .family = &fam_rcar_gen3, 169 .id = 0x57, 170 }; 171 172 static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = { 173 .family = &fam_rcar_gen3, 174 .id = 0x58, 175 }; 176 177 static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = { 178 .family = &fam_shmobile, 179 .id = 0x37, 180 }; 181 182 183 static const struct of_device_id renesas_socs[] __initconst = { 184 #ifdef CONFIG_ARCH_R7S72100 185 { .compatible = "renesas,r7s72100", .data = &soc_rz_a1h }, 186 #endif 187 #ifdef CONFIG_ARCH_R8A73A4 188 { .compatible = "renesas,r8a73a4", .data = &soc_rmobile_ape6 }, 189 #endif 190 #ifdef CONFIG_ARCH_R8A7740 191 { .compatible = "renesas,r8a7740", .data = &soc_rmobile_a1 }, 192 #endif 193 #ifdef CONFIG_ARCH_R8A7742 194 { .compatible = "renesas,r8a7742", .data = &soc_rz_g1h }, 195 #endif 196 #ifdef CONFIG_ARCH_R8A7743 197 { .compatible = "renesas,r8a7743", .data = &soc_rz_g1m }, 198 #endif 199 #ifdef CONFIG_ARCH_R8A7744 200 { .compatible = "renesas,r8a7744", .data = &soc_rz_g1n }, 201 #endif 202 #ifdef CONFIG_ARCH_R8A7745 203 { .compatible = "renesas,r8a7745", .data = &soc_rz_g1e }, 204 #endif 205 #ifdef CONFIG_ARCH_R8A77470 206 { .compatible = "renesas,r8a77470", .data = &soc_rz_g1c }, 207 #endif 208 #ifdef CONFIG_ARCH_R8A7778 209 { .compatible = "renesas,r8a7778", .data = &soc_rcar_m1a }, 210 #endif 211 #ifdef CONFIG_ARCH_R8A7779 212 { .compatible = "renesas,r8a7779", .data = &soc_rcar_h1 }, 213 #endif 214 #ifdef CONFIG_ARCH_R8A7790 215 { .compatible = "renesas,r8a7790", .data = &soc_rcar_h2 }, 216 #endif 217 #ifdef CONFIG_ARCH_R8A7791 218 { .compatible = "renesas,r8a7791", .data = &soc_rcar_m2_w }, 219 #endif 220 #ifdef CONFIG_ARCH_R8A7792 221 { .compatible = "renesas,r8a7792", .data = &soc_rcar_v2h }, 222 #endif 223 #ifdef CONFIG_ARCH_R8A7793 224 { .compatible = "renesas,r8a7793", .data = &soc_rcar_m2_n }, 225 #endif 226 #ifdef CONFIG_ARCH_R8A7794 227 { .compatible = "renesas,r8a7794", .data = &soc_rcar_e2 }, 228 #endif 229 #ifdef CONFIG_ARCH_R8A7795 230 { .compatible = "renesas,r8a7795", .data = &soc_rcar_h3 }, 231 #endif 232 #ifdef CONFIG_ARCH_R8A7796 233 { .compatible = "renesas,r8a7796", .data = &soc_rcar_m3_w }, 234 #endif 235 #ifdef CONFIG_ARCH_R8A77965 236 { .compatible = "renesas,r8a77965", .data = &soc_rcar_m3_n }, 237 #endif 238 #ifdef CONFIG_ARCH_R8A77970 239 { .compatible = "renesas,r8a77970", .data = &soc_rcar_v3m }, 240 #endif 241 #ifdef CONFIG_ARCH_R8A77980 242 { .compatible = "renesas,r8a77980", .data = &soc_rcar_v3h }, 243 #endif 244 #ifdef CONFIG_ARCH_R8A77990 245 { .compatible = "renesas,r8a77990", .data = &soc_rcar_e3 }, 246 #endif 247 #ifdef CONFIG_ARCH_R8A77995 248 { .compatible = "renesas,r8a77995", .data = &soc_rcar_d3 }, 249 #endif 250 #ifdef CONFIG_ARCH_SH73A0 251 { .compatible = "renesas,sh73a0", .data = &soc_shmobile_ag5 }, 252 #endif 253 { /* sentinel */ } 254 }; 255 256 static int __init renesas_soc_init(void) 257 { 258 struct soc_device_attribute *soc_dev_attr; 259 const struct renesas_family *family; 260 const struct of_device_id *match; 261 const struct renesas_soc *soc; 262 void __iomem *chipid = NULL; 263 struct soc_device *soc_dev; 264 struct device_node *np; 265 unsigned int product; 266 267 match = of_match_node(renesas_socs, of_root); 268 if (!match) 269 return -ENODEV; 270 271 soc = match->data; 272 family = soc->family; 273 274 /* Try PRR first, then hardcoded fallback */ 275 np = of_find_compatible_node(NULL, NULL, "renesas,prr"); 276 if (np) { 277 chipid = of_iomap(np, 0); 278 of_node_put(np); 279 } else if (soc->id) { 280 chipid = ioremap(family->reg, 4); 281 } 282 if (chipid) { 283 product = readl(chipid); 284 iounmap(chipid); 285 /* R-Car M3-W ES1.1 incorrectly identifies as ES2.0 */ 286 if ((product & 0x7fff) == 0x5210) 287 product ^= 0x11; 288 if (soc->id && ((product >> 8) & 0xff) != soc->id) { 289 pr_warn("SoC mismatch (product = 0x%x)\n", product); 290 return -ENODEV; 291 } 292 } 293 294 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); 295 if (!soc_dev_attr) 296 return -ENOMEM; 297 298 np = of_find_node_by_path("/"); 299 of_property_read_string(np, "model", &soc_dev_attr->machine); 300 of_node_put(np); 301 302 soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL); 303 soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1, 304 GFP_KERNEL); 305 if (chipid) 306 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", 307 ((product >> 4) & 0x0f) + 1, 308 product & 0xf); 309 310 pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family, 311 soc_dev_attr->soc_id, soc_dev_attr->revision ?: ""); 312 313 soc_dev = soc_device_register(soc_dev_attr); 314 if (IS_ERR(soc_dev)) { 315 kfree(soc_dev_attr->revision); 316 kfree_const(soc_dev_attr->soc_id); 317 kfree_const(soc_dev_attr->family); 318 kfree(soc_dev_attr); 319 return PTR_ERR(soc_dev); 320 } 321 322 return 0; 323 } 324 early_initcall(renesas_soc_init); 325