linux/drivers/soc/renesas/renesas-soc.c
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   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
  16struct renesas_family {
  17        const char name[16];
  18        u32 reg;                        /* CCCR or PRR, if not in DT */
  19};
  20
  21static const struct renesas_family fam_rcar_gen1 __initconst __maybe_unused = {
  22        .name   = "R-Car Gen1",
  23        .reg    = 0xff000044,           /* PRR (Product Register) */
  24};
  25
  26static const struct renesas_family fam_rcar_gen2 __initconst __maybe_unused = {
  27        .name   = "R-Car Gen2",
  28        .reg    = 0xff000044,           /* PRR (Product Register) */
  29};
  30
  31static const struct renesas_family fam_rcar_gen3 __initconst __maybe_unused = {
  32        .name   = "R-Car Gen3",
  33        .reg    = 0xfff00044,           /* PRR (Product Register) */
  34};
  35
  36static const struct renesas_family fam_rmobile __initconst __maybe_unused = {
  37        .name   = "R-Mobile",
  38        .reg    = 0xe600101c,           /* CCCR (Common Chip Code Register) */
  39};
  40
  41static const struct renesas_family fam_rza1 __initconst __maybe_unused = {
  42        .name   = "RZ/A1",
  43};
  44
  45static const struct renesas_family fam_rza2 __initconst __maybe_unused = {
  46        .name   = "RZ/A2",
  47};
  48
  49static const struct renesas_family fam_rzg1 __initconst __maybe_unused = {
  50        .name   = "RZ/G1",
  51        .reg    = 0xff000044,           /* PRR (Product Register) */
  52};
  53
  54static const struct renesas_family fam_rzg2 __initconst __maybe_unused = {
  55        .name   = "RZ/G2",
  56        .reg    = 0xfff00044,           /* PRR (Product Register) */
  57};
  58
  59static const struct renesas_family fam_rzg2l __initconst __maybe_unused = {
  60        .name   = "RZ/G2L",
  61};
  62
  63static const struct renesas_family fam_shmobile __initconst __maybe_unused = {
  64        .name   = "SH-Mobile",
  65        .reg    = 0xe600101c,           /* CCCR (Common Chip Code Register) */
  66};
  67
  68
  69struct renesas_soc {
  70        const struct renesas_family *family;
  71        u32 id;
  72};
  73
  74static const struct renesas_soc soc_rz_a1h __initconst __maybe_unused = {
  75        .family = &fam_rza1,
  76};
  77
  78static const struct renesas_soc soc_rz_a2m __initconst __maybe_unused = {
  79        .family = &fam_rza2,
  80        .id     = 0x3b,
  81};
  82
  83static const struct renesas_soc soc_rmobile_ape6 __initconst __maybe_unused = {
  84        .family = &fam_rmobile,
  85        .id     = 0x3f,
  86};
  87
  88static const struct renesas_soc soc_rmobile_a1 __initconst __maybe_unused = {
  89        .family = &fam_rmobile,
  90        .id     = 0x40,
  91};
  92
  93static const struct renesas_soc soc_rz_g1h __initconst __maybe_unused = {
  94        .family = &fam_rzg1,
  95        .id     = 0x45,
  96};
  97
  98static const struct renesas_soc soc_rz_g1m __initconst __maybe_unused = {
  99        .family = &fam_rzg1,
 100        .id     = 0x47,
 101};
 102
 103static const struct renesas_soc soc_rz_g1n __initconst __maybe_unused = {
 104        .family = &fam_rzg1,
 105        .id     = 0x4b,
 106};
 107
 108static const struct renesas_soc soc_rz_g1e __initconst __maybe_unused = {
 109        .family = &fam_rzg1,
 110        .id     = 0x4c,
 111};
 112
 113static const struct renesas_soc soc_rz_g1c __initconst __maybe_unused = {
 114        .family = &fam_rzg1,
 115        .id     = 0x53,
 116};
 117
 118static const struct renesas_soc soc_rz_g2m __initconst __maybe_unused = {
 119        .family = &fam_rzg2,
 120        .id     = 0x52,
 121};
 122
 123static const struct renesas_soc soc_rz_g2n __initconst __maybe_unused = {
 124        .family = &fam_rzg2,
 125        .id     = 0x55,
 126};
 127
 128static const struct renesas_soc soc_rz_g2e __initconst __maybe_unused = {
 129        .family = &fam_rzg2,
 130        .id     = 0x57,
 131};
 132
 133static const struct renesas_soc soc_rz_g2h __initconst __maybe_unused = {
 134        .family = &fam_rzg2,
 135        .id     = 0x4f,
 136};
 137
 138static const struct renesas_soc soc_rz_g2l __initconst __maybe_unused = {
 139        .family = &fam_rzg2l,
 140        .id     = 0x841c447,
 141};
 142
 143static const struct renesas_soc soc_rcar_m1a __initconst __maybe_unused = {
 144        .family = &fam_rcar_gen1,
 145};
 146
 147static const struct renesas_soc soc_rcar_h1 __initconst __maybe_unused = {
 148        .family = &fam_rcar_gen1,
 149        .id     = 0x3b,
 150};
 151
 152static const struct renesas_soc soc_rcar_h2 __initconst __maybe_unused = {
 153        .family = &fam_rcar_gen2,
 154        .id     = 0x45,
 155};
 156
 157static const struct renesas_soc soc_rcar_m2_w __initconst __maybe_unused = {
 158        .family = &fam_rcar_gen2,
 159        .id     = 0x47,
 160};
 161
 162static const struct renesas_soc soc_rcar_v2h __initconst __maybe_unused = {
 163        .family = &fam_rcar_gen2,
 164        .id     = 0x4a,
 165};
 166
 167static const struct renesas_soc soc_rcar_m2_n __initconst __maybe_unused = {
 168        .family = &fam_rcar_gen2,
 169        .id     = 0x4b,
 170};
 171
 172static const struct renesas_soc soc_rcar_e2 __initconst __maybe_unused = {
 173        .family = &fam_rcar_gen2,
 174        .id     = 0x4c,
 175};
 176
 177static const struct renesas_soc soc_rcar_h3 __initconst __maybe_unused = {
 178        .family = &fam_rcar_gen3,
 179        .id     = 0x4f,
 180};
 181
 182static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = {
 183        .family = &fam_rcar_gen3,
 184        .id     = 0x52,
 185};
 186
 187static const struct renesas_soc soc_rcar_m3_n __initconst __maybe_unused = {
 188        .family = &fam_rcar_gen3,
 189        .id     = 0x55,
 190};
 191
 192static const struct renesas_soc soc_rcar_v3m __initconst __maybe_unused = {
 193        .family = &fam_rcar_gen3,
 194        .id     = 0x54,
 195};
 196
 197static const struct renesas_soc soc_rcar_v3h __initconst __maybe_unused = {
 198        .family = &fam_rcar_gen3,
 199        .id     = 0x56,
 200};
 201
 202static const struct renesas_soc soc_rcar_e3 __initconst __maybe_unused = {
 203        .family = &fam_rcar_gen3,
 204        .id     = 0x57,
 205};
 206
 207static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = {
 208        .family = &fam_rcar_gen3,
 209        .id     = 0x58,
 210};
 211
 212static const struct renesas_soc soc_rcar_v3u __initconst __maybe_unused = {
 213        .family = &fam_rcar_gen3,
 214        .id     = 0x59,
 215};
 216
 217static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = {
 218        .family = &fam_shmobile,
 219        .id     = 0x37,
 220};
 221
 222
 223static const struct of_device_id renesas_socs[] __initconst = {
 224#ifdef CONFIG_ARCH_R7S72100
 225        { .compatible = "renesas,r7s72100",     .data = &soc_rz_a1h },
 226#endif
 227#ifdef CONFIG_ARCH_R7S9210
 228        { .compatible = "renesas,r7s9210",      .data = &soc_rz_a2m },
 229#endif
 230#ifdef CONFIG_ARCH_R8A73A4
 231        { .compatible = "renesas,r8a73a4",      .data = &soc_rmobile_ape6 },
 232#endif
 233#ifdef CONFIG_ARCH_R8A7740
 234        { .compatible = "renesas,r8a7740",      .data = &soc_rmobile_a1 },
 235#endif
 236#ifdef CONFIG_ARCH_R8A7742
 237        { .compatible = "renesas,r8a7742",      .data = &soc_rz_g1h },
 238#endif
 239#ifdef CONFIG_ARCH_R8A7743
 240        { .compatible = "renesas,r8a7743",      .data = &soc_rz_g1m },
 241#endif
 242#ifdef CONFIG_ARCH_R8A7744
 243        { .compatible = "renesas,r8a7744",      .data = &soc_rz_g1n },
 244#endif
 245#ifdef CONFIG_ARCH_R8A7745
 246        { .compatible = "renesas,r8a7745",      .data = &soc_rz_g1e },
 247#endif
 248#ifdef CONFIG_ARCH_R8A77470
 249        { .compatible = "renesas,r8a77470",     .data = &soc_rz_g1c },
 250#endif
 251#ifdef CONFIG_ARCH_R8A774A1
 252        { .compatible = "renesas,r8a774a1",     .data = &soc_rz_g2m },
 253#endif
 254#ifdef CONFIG_ARCH_R8A774B1
 255        { .compatible = "renesas,r8a774b1",     .data = &soc_rz_g2n },
 256#endif
 257#ifdef CONFIG_ARCH_R8A774C0
 258        { .compatible = "renesas,r8a774c0",     .data = &soc_rz_g2e },
 259#endif
 260#ifdef CONFIG_ARCH_R8A774E1
 261        { .compatible = "renesas,r8a774e1",     .data = &soc_rz_g2h },
 262#endif
 263#ifdef CONFIG_ARCH_R8A7778
 264        { .compatible = "renesas,r8a7778",      .data = &soc_rcar_m1a },
 265#endif
 266#ifdef CONFIG_ARCH_R8A7779
 267        { .compatible = "renesas,r8a7779",      .data = &soc_rcar_h1 },
 268#endif
 269#ifdef CONFIG_ARCH_R8A7790
 270        { .compatible = "renesas,r8a7790",      .data = &soc_rcar_h2 },
 271#endif
 272#ifdef CONFIG_ARCH_R8A7791
 273        { .compatible = "renesas,r8a7791",      .data = &soc_rcar_m2_w },
 274#endif
 275#ifdef CONFIG_ARCH_R8A7792
 276        { .compatible = "renesas,r8a7792",      .data = &soc_rcar_v2h },
 277#endif
 278#ifdef CONFIG_ARCH_R8A7793
 279        { .compatible = "renesas,r8a7793",      .data = &soc_rcar_m2_n },
 280#endif
 281#ifdef CONFIG_ARCH_R8A7794
 282        { .compatible = "renesas,r8a7794",      .data = &soc_rcar_e2 },
 283#endif
 284#if defined(CONFIG_ARCH_R8A77950) || defined(CONFIG_ARCH_R8A77951)
 285        { .compatible = "renesas,r8a7795",      .data = &soc_rcar_h3 },
 286#endif
 287#ifdef CONFIG_ARCH_R8A77960
 288        { .compatible = "renesas,r8a7796",      .data = &soc_rcar_m3_w },
 289#endif
 290#ifdef CONFIG_ARCH_R8A77961
 291        { .compatible = "renesas,r8a77961",     .data = &soc_rcar_m3_w },
 292#endif
 293#ifdef CONFIG_ARCH_R8A77965
 294        { .compatible = "renesas,r8a77965",     .data = &soc_rcar_m3_n },
 295#endif
 296#ifdef CONFIG_ARCH_R8A77970
 297        { .compatible = "renesas,r8a77970",     .data = &soc_rcar_v3m },
 298#endif
 299#ifdef CONFIG_ARCH_R8A77980
 300        { .compatible = "renesas,r8a77980",     .data = &soc_rcar_v3h },
 301#endif
 302#ifdef CONFIG_ARCH_R8A77990
 303        { .compatible = "renesas,r8a77990",     .data = &soc_rcar_e3 },
 304#endif
 305#ifdef CONFIG_ARCH_R8A77995
 306        { .compatible = "renesas,r8a77995",     .data = &soc_rcar_d3 },
 307#endif
 308#ifdef CONFIG_ARCH_R8A779A0
 309        { .compatible = "renesas,r8a779a0",     .data = &soc_rcar_v3u },
 310#endif
 311#if defined(CONFIG_ARCH_R9A07G044)
 312        { .compatible = "renesas,r9a07g044",    .data = &soc_rz_g2l },
 313#endif
 314#ifdef CONFIG_ARCH_SH73A0
 315        { .compatible = "renesas,sh73a0",       .data = &soc_shmobile_ag5 },
 316#endif
 317        { /* sentinel */ }
 318};
 319
 320static int __init renesas_soc_init(void)
 321{
 322        struct soc_device_attribute *soc_dev_attr;
 323        const struct renesas_family *family;
 324        const struct of_device_id *match;
 325        const struct renesas_soc *soc;
 326        void __iomem *chipid = NULL;
 327        struct soc_device *soc_dev;
 328        struct device_node *np;
 329        unsigned int product, eshi = 0, eslo;
 330
 331        match = of_match_node(renesas_socs, of_root);
 332        if (!match)
 333                return -ENODEV;
 334
 335        soc = match->data;
 336        family = soc->family;
 337
 338        np = of_find_compatible_node(NULL, NULL, "renesas,bsid");
 339        if (np) {
 340                chipid = of_iomap(np, 0);
 341                of_node_put(np);
 342
 343                if (chipid) {
 344                        product = readl(chipid);
 345                        iounmap(chipid);
 346
 347                        if (soc->id && ((product >> 16) & 0xff) != soc->id) {
 348                                pr_warn("SoC mismatch (product = 0x%x)\n",
 349                                        product);
 350                                return -ENODEV;
 351                        }
 352                }
 353
 354                /*
 355                 * TODO: Upper 4 bits of BSID are for chip version, but the
 356                 * format is not known at this time so we don't know how to
 357                 * specify eshi and eslo
 358                 */
 359
 360                goto done;
 361        }
 362
 363        np = of_find_compatible_node(NULL, NULL, "renesas,r9a07g044-sysc");
 364        if (np) {
 365                chipid = of_iomap(np, 0);
 366                of_node_put(np);
 367
 368                if (chipid) {
 369                        product = readl(chipid + 0x0a04);
 370                        iounmap(chipid);
 371
 372                        if (soc->id && (product & 0xfffffff) != soc->id) {
 373                                pr_warn("SoC mismatch (product = 0x%x)\n",
 374                                        product);
 375                                return -ENODEV;
 376                        }
 377                }
 378
 379                goto done;
 380        }
 381
 382        /* Try PRR first, then hardcoded fallback */
 383        np = of_find_compatible_node(NULL, NULL, "renesas,prr");
 384        if (np) {
 385                chipid = of_iomap(np, 0);
 386                of_node_put(np);
 387        } else if (soc->id && family->reg) {
 388                chipid = ioremap(family->reg, 4);
 389        }
 390        if (chipid) {
 391                product = readl(chipid);
 392                iounmap(chipid);
 393                /* R-Car M3-W ES1.1 incorrectly identifies as ES2.0 */
 394                if ((product & 0x7fff) == 0x5210)
 395                        product ^= 0x11;
 396                /* R-Car M3-W ES1.3 incorrectly identifies as ES2.1 */
 397                if ((product & 0x7fff) == 0x5211)
 398                        product ^= 0x12;
 399                if (soc->id && ((product >> 8) & 0xff) != soc->id) {
 400                        pr_warn("SoC mismatch (product = 0x%x)\n", product);
 401                        return -ENODEV;
 402                }
 403                eshi = ((product >> 4) & 0x0f) + 1;
 404                eslo = product & 0xf;
 405        }
 406
 407done:
 408        soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 409        if (!soc_dev_attr)
 410                return -ENOMEM;
 411
 412        np = of_find_node_by_path("/");
 413        of_property_read_string(np, "model", &soc_dev_attr->machine);
 414        of_node_put(np);
 415
 416        soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL);
 417        soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1,
 418                                             GFP_KERNEL);
 419        if (eshi)
 420                soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", eshi,
 421                                                   eslo);
 422
 423        pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family,
 424                soc_dev_attr->soc_id, soc_dev_attr->revision ?: "");
 425
 426        soc_dev = soc_device_register(soc_dev_attr);
 427        if (IS_ERR(soc_dev)) {
 428                kfree(soc_dev_attr->revision);
 429                kfree_const(soc_dev_attr->soc_id);
 430                kfree_const(soc_dev_attr->family);
 431                kfree(soc_dev_attr);
 432                return PTR_ERR(soc_dev);
 433        }
 434
 435        return 0;
 436}
 437early_initcall(renesas_soc_init);
 438