1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Renesas SoC Identification 4 * 5 * Copyright (C) 2014-2016 Glider bvba 6 */ 7 8 #include <linux/io.h> 9 #include <linux/of.h> 10 #include <linux/of_address.h> 11 #include <linux/slab.h> 12 #include <linux/string.h> 13 #include <linux/sys_soc.h> 14 15 16 struct renesas_family { 17 const char name[16]; 18 u32 reg; /* CCCR or PRR, if not in DT */ 19 }; 20 21 static const struct renesas_family fam_rcar_gen1 __initconst __maybe_unused = { 22 .name = "R-Car Gen1", 23 .reg = 0xff000044, /* PRR (Product Register) */ 24 }; 25 26 static const struct renesas_family fam_rcar_gen2 __initconst __maybe_unused = { 27 .name = "R-Car Gen2", 28 .reg = 0xff000044, /* PRR (Product Register) */ 29 }; 30 31 static const struct renesas_family fam_rcar_gen3 __initconst __maybe_unused = { 32 .name = "R-Car Gen3", 33 .reg = 0xfff00044, /* PRR (Product Register) */ 34 }; 35 36 static const struct renesas_family fam_rmobile __initconst __maybe_unused = { 37 .name = "R-Mobile", 38 .reg = 0xe600101c, /* CCCR (Common Chip Code Register) */ 39 }; 40 41 static const struct renesas_family fam_rza1 __initconst __maybe_unused = { 42 .name = "RZ/A1", 43 }; 44 45 static const struct renesas_family fam_rza2 __initconst __maybe_unused = { 46 .name = "RZ/A2", 47 }; 48 49 static const struct renesas_family fam_rzg1 __initconst __maybe_unused = { 50 .name = "RZ/G1", 51 .reg = 0xff000044, /* PRR (Product Register) */ 52 }; 53 54 static const struct renesas_family fam_rzg2 __initconst __maybe_unused = { 55 .name = "RZ/G2", 56 .reg = 0xfff00044, /* PRR (Product Register) */ 57 }; 58 59 static const struct renesas_family fam_shmobile __initconst __maybe_unused = { 60 .name = "SH-Mobile", 61 .reg = 0xe600101c, /* CCCR (Common Chip Code Register) */ 62 }; 63 64 65 struct renesas_soc { 66 const struct renesas_family *family; 67 u8 id; 68 }; 69 70 static const struct renesas_soc soc_rz_a1h __initconst __maybe_unused = { 71 .family = &fam_rza1, 72 }; 73 74 static const struct renesas_soc soc_rz_a2m __initconst __maybe_unused = { 75 .family = &fam_rza2, 76 .id = 0x3b, 77 }; 78 79 static const struct renesas_soc soc_rmobile_ape6 __initconst __maybe_unused = { 80 .family = &fam_rmobile, 81 .id = 0x3f, 82 }; 83 84 static const struct renesas_soc soc_rmobile_a1 __initconst __maybe_unused = { 85 .family = &fam_rmobile, 86 .id = 0x40, 87 }; 88 89 static const struct renesas_soc soc_rz_g1h __initconst __maybe_unused = { 90 .family = &fam_rzg1, 91 .id = 0x45, 92 }; 93 94 static const struct renesas_soc soc_rz_g1m __initconst __maybe_unused = { 95 .family = &fam_rzg1, 96 .id = 0x47, 97 }; 98 99 static const struct renesas_soc soc_rz_g1n __initconst __maybe_unused = { 100 .family = &fam_rzg1, 101 .id = 0x4b, 102 }; 103 104 static const struct renesas_soc soc_rz_g1e __initconst __maybe_unused = { 105 .family = &fam_rzg1, 106 .id = 0x4c, 107 }; 108 109 static const struct renesas_soc soc_rz_g1c __initconst __maybe_unused = { 110 .family = &fam_rzg1, 111 .id = 0x53, 112 }; 113 114 static const struct renesas_soc soc_rz_g2m __initconst __maybe_unused = { 115 .family = &fam_rzg2, 116 .id = 0x52, 117 }; 118 119 static const struct renesas_soc soc_rz_g2n __initconst __maybe_unused = { 120 .family = &fam_rzg2, 121 .id = 0x55, 122 }; 123 124 static const struct renesas_soc soc_rz_g2e __initconst __maybe_unused = { 125 .family = &fam_rzg2, 126 .id = 0x57, 127 }; 128 129 static const struct renesas_soc soc_rcar_m1a __initconst __maybe_unused = { 130 .family = &fam_rcar_gen1, 131 }; 132 133 static const struct renesas_soc soc_rcar_h1 __initconst __maybe_unused = { 134 .family = &fam_rcar_gen1, 135 .id = 0x3b, 136 }; 137 138 static const struct renesas_soc soc_rcar_h2 __initconst __maybe_unused = { 139 .family = &fam_rcar_gen2, 140 .id = 0x45, 141 }; 142 143 static const struct renesas_soc soc_rcar_m2_w __initconst __maybe_unused = { 144 .family = &fam_rcar_gen2, 145 .id = 0x47, 146 }; 147 148 static const struct renesas_soc soc_rcar_v2h __initconst __maybe_unused = { 149 .family = &fam_rcar_gen2, 150 .id = 0x4a, 151 }; 152 153 static const struct renesas_soc soc_rcar_m2_n __initconst __maybe_unused = { 154 .family = &fam_rcar_gen2, 155 .id = 0x4b, 156 }; 157 158 static const struct renesas_soc soc_rcar_e2 __initconst __maybe_unused = { 159 .family = &fam_rcar_gen2, 160 .id = 0x4c, 161 }; 162 163 static const struct renesas_soc soc_rcar_h3 __initconst __maybe_unused = { 164 .family = &fam_rcar_gen3, 165 .id = 0x4f, 166 }; 167 168 static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = { 169 .family = &fam_rcar_gen3, 170 .id = 0x52, 171 }; 172 173 static const struct renesas_soc soc_rcar_m3_n __initconst __maybe_unused = { 174 .family = &fam_rcar_gen3, 175 .id = 0x55, 176 }; 177 178 static const struct renesas_soc soc_rcar_v3m __initconst __maybe_unused = { 179 .family = &fam_rcar_gen3, 180 .id = 0x54, 181 }; 182 183 static const struct renesas_soc soc_rcar_v3h __initconst __maybe_unused = { 184 .family = &fam_rcar_gen3, 185 .id = 0x56, 186 }; 187 188 static const struct renesas_soc soc_rcar_e3 __initconst __maybe_unused = { 189 .family = &fam_rcar_gen3, 190 .id = 0x57, 191 }; 192 193 static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = { 194 .family = &fam_rcar_gen3, 195 .id = 0x58, 196 }; 197 198 static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = { 199 .family = &fam_shmobile, 200 .id = 0x37, 201 }; 202 203 204 static const struct of_device_id renesas_socs[] __initconst = { 205 #ifdef CONFIG_ARCH_R7S72100 206 { .compatible = "renesas,r7s72100", .data = &soc_rz_a1h }, 207 #endif 208 #ifdef CONFIG_ARCH_R7S9210 209 { .compatible = "renesas,r7s9210", .data = &soc_rz_a2m }, 210 #endif 211 #ifdef CONFIG_ARCH_R8A73A4 212 { .compatible = "renesas,r8a73a4", .data = &soc_rmobile_ape6 }, 213 #endif 214 #ifdef CONFIG_ARCH_R8A7740 215 { .compatible = "renesas,r8a7740", .data = &soc_rmobile_a1 }, 216 #endif 217 #ifdef CONFIG_ARCH_R8A7742 218 { .compatible = "renesas,r8a7742", .data = &soc_rz_g1h }, 219 #endif 220 #ifdef CONFIG_ARCH_R8A7743 221 { .compatible = "renesas,r8a7743", .data = &soc_rz_g1m }, 222 #endif 223 #ifdef CONFIG_ARCH_R8A7744 224 { .compatible = "renesas,r8a7744", .data = &soc_rz_g1n }, 225 #endif 226 #ifdef CONFIG_ARCH_R8A7745 227 { .compatible = "renesas,r8a7745", .data = &soc_rz_g1e }, 228 #endif 229 #ifdef CONFIG_ARCH_R8A77470 230 { .compatible = "renesas,r8a77470", .data = &soc_rz_g1c }, 231 #endif 232 #ifdef CONFIG_ARCH_R8A774A1 233 { .compatible = "renesas,r8a774a1", .data = &soc_rz_g2m }, 234 #endif 235 #ifdef CONFIG_ARCH_R8A774B1 236 { .compatible = "renesas,r8a774b1", .data = &soc_rz_g2n }, 237 #endif 238 #ifdef CONFIG_ARCH_R8A774C0 239 { .compatible = "renesas,r8a774c0", .data = &soc_rz_g2e }, 240 #endif 241 #ifdef CONFIG_ARCH_R8A7778 242 { .compatible = "renesas,r8a7778", .data = &soc_rcar_m1a }, 243 #endif 244 #ifdef CONFIG_ARCH_R8A7779 245 { .compatible = "renesas,r8a7779", .data = &soc_rcar_h1 }, 246 #endif 247 #ifdef CONFIG_ARCH_R8A7790 248 { .compatible = "renesas,r8a7790", .data = &soc_rcar_h2 }, 249 #endif 250 #ifdef CONFIG_ARCH_R8A7791 251 { .compatible = "renesas,r8a7791", .data = &soc_rcar_m2_w }, 252 #endif 253 #ifdef CONFIG_ARCH_R8A7792 254 { .compatible = "renesas,r8a7792", .data = &soc_rcar_v2h }, 255 #endif 256 #ifdef CONFIG_ARCH_R8A7793 257 { .compatible = "renesas,r8a7793", .data = &soc_rcar_m2_n }, 258 #endif 259 #ifdef CONFIG_ARCH_R8A7794 260 { .compatible = "renesas,r8a7794", .data = &soc_rcar_e2 }, 261 #endif 262 #ifdef CONFIG_ARCH_R8A7795 263 { .compatible = "renesas,r8a7795", .data = &soc_rcar_h3 }, 264 #endif 265 #ifdef CONFIG_ARCH_R8A77960 266 { .compatible = "renesas,r8a7796", .data = &soc_rcar_m3_w }, 267 #endif 268 #ifdef CONFIG_ARCH_R8A77961 269 { .compatible = "renesas,r8a77961", .data = &soc_rcar_m3_w }, 270 #endif 271 #ifdef CONFIG_ARCH_R8A77965 272 { .compatible = "renesas,r8a77965", .data = &soc_rcar_m3_n }, 273 #endif 274 #ifdef CONFIG_ARCH_R8A77970 275 { .compatible = "renesas,r8a77970", .data = &soc_rcar_v3m }, 276 #endif 277 #ifdef CONFIG_ARCH_R8A77980 278 { .compatible = "renesas,r8a77980", .data = &soc_rcar_v3h }, 279 #endif 280 #ifdef CONFIG_ARCH_R8A77990 281 { .compatible = "renesas,r8a77990", .data = &soc_rcar_e3 }, 282 #endif 283 #ifdef CONFIG_ARCH_R8A77995 284 { .compatible = "renesas,r8a77995", .data = &soc_rcar_d3 }, 285 #endif 286 #ifdef CONFIG_ARCH_SH73A0 287 { .compatible = "renesas,sh73a0", .data = &soc_shmobile_ag5 }, 288 #endif 289 { /* sentinel */ } 290 }; 291 292 static int __init renesas_soc_init(void) 293 { 294 struct soc_device_attribute *soc_dev_attr; 295 const struct renesas_family *family; 296 const struct of_device_id *match; 297 const struct renesas_soc *soc; 298 void __iomem *chipid = NULL; 299 struct soc_device *soc_dev; 300 struct device_node *np; 301 unsigned int product, eshi = 0, eslo; 302 303 match = of_match_node(renesas_socs, of_root); 304 if (!match) 305 return -ENODEV; 306 307 soc = match->data; 308 family = soc->family; 309 310 np = of_find_compatible_node(NULL, NULL, "renesas,bsid"); 311 if (np) { 312 chipid = of_iomap(np, 0); 313 of_node_put(np); 314 315 if (chipid) { 316 product = readl(chipid); 317 iounmap(chipid); 318 319 if (soc->id && ((product >> 16) & 0xff) != soc->id) { 320 pr_warn("SoC mismatch (product = 0x%x)\n", 321 product); 322 return -ENODEV; 323 } 324 } 325 326 /* 327 * TODO: Upper 4 bits of BSID are for chip version, but the 328 * format is not known at this time so we don't know how to 329 * specify eshi and eslo 330 */ 331 332 goto done; 333 } 334 335 /* Try PRR first, then hardcoded fallback */ 336 np = of_find_compatible_node(NULL, NULL, "renesas,prr"); 337 if (np) { 338 chipid = of_iomap(np, 0); 339 of_node_put(np); 340 } else if (soc->id && family->reg) { 341 chipid = ioremap(family->reg, 4); 342 } 343 if (chipid) { 344 product = readl(chipid); 345 iounmap(chipid); 346 /* R-Car M3-W ES1.1 incorrectly identifies as ES2.0 */ 347 if ((product & 0x7fff) == 0x5210) 348 product ^= 0x11; 349 /* R-Car M3-W ES1.3 incorrectly identifies as ES2.1 */ 350 if ((product & 0x7fff) == 0x5211) 351 product ^= 0x12; 352 if (soc->id && ((product >> 8) & 0xff) != soc->id) { 353 pr_warn("SoC mismatch (product = 0x%x)\n", product); 354 return -ENODEV; 355 } 356 eshi = ((product >> 4) & 0x0f) + 1; 357 eslo = product & 0xf; 358 } 359 360 done: 361 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); 362 if (!soc_dev_attr) 363 return -ENOMEM; 364 365 np = of_find_node_by_path("/"); 366 of_property_read_string(np, "model", &soc_dev_attr->machine); 367 of_node_put(np); 368 369 soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL); 370 soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1, 371 GFP_KERNEL); 372 if (eshi) 373 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", eshi, 374 eslo); 375 376 pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family, 377 soc_dev_attr->soc_id, soc_dev_attr->revision ?: ""); 378 379 soc_dev = soc_device_register(soc_dev_attr); 380 if (IS_ERR(soc_dev)) { 381 kfree(soc_dev_attr->revision); 382 kfree_const(soc_dev_attr->soc_id); 383 kfree_const(soc_dev_attr->family); 384 kfree(soc_dev_attr); 385 return PTR_ERR(soc_dev); 386 } 387 388 return 0; 389 } 390 early_initcall(renesas_soc_init); 391