drivers/soc/renesas/renesas-soc.c

   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                 /* R-Car M3-W ES1.3 incorrectly identifies as ES2.1 */
 289                 if ((product & 0x7fff) == 0x5211)
 290                         product ^= 0x12;
 291                 if (soc->id && ((product >> 8) & 0xff) != soc->id) {
 292                         pr_warn("SoC mismatch (product = 0x%x)\n", product);
 293                         return -ENODEV;
 294                 }
 295         }
 296
 297         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 298         if (!soc_dev_attr)
 299                 return -ENOMEM;
 300
 301         np = of_find_node_by_path("/");
 302         of_property_read_string(np, "model", &soc_dev_attr->machine);
 303         of_node_put(np);
 304
 305         soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL);
 306         soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1,
 307                                              GFP_KERNEL);
 308         if (chipid)
 309                 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u",
 310                                                    ((product >> 4) & 0x0f) + 1,
 311                                                    product & 0xf);
 312
 313         pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family,
 314                 soc_dev_attr->soc_id, soc_dev_attr->revision ?: "");
 315
 316         soc_dev = soc_device_register(soc_dev_attr);
 317         if (IS_ERR(soc_dev)) {
 318                 kfree(soc_dev_attr->revision);
 319                 kfree_const(soc_dev_attr->soc_id);
 320                 kfree_const(soc_dev_attr->family);
 321                 kfree(soc_dev_attr);
 322                 return PTR_ERR(soc_dev);
 323         }
 324
 325         return 0;
 326 }
 327 early_initcall(renesas_soc_init);