drivers/soc/renesas/renesas-soc.c

   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);