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_rcar_m1a __initconst __maybe_unused = { 104 .family = &fam_rcar_gen1, 105 }; 106 107 static const struct renesas_soc soc_rcar_h1 __initconst __maybe_unused = { 108 .family = &fam_rcar_gen1, 109 .id = 0x3b, 110 }; 111 112 static const struct renesas_soc soc_rcar_h2 __initconst __maybe_unused = { 113 .family = &fam_rcar_gen2, 114 .id = 0x45, 115 }; 116 117 static const struct renesas_soc soc_rcar_m2_w __initconst __maybe_unused = { 118 .family = &fam_rcar_gen2, 119 .id = 0x47, 120 }; 121 122 static const struct renesas_soc soc_rcar_v2h __initconst __maybe_unused = { 123 .family = &fam_rcar_gen2, 124 .id = 0x4a, 125 }; 126 127 static const struct renesas_soc soc_rcar_m2_n __initconst __maybe_unused = { 128 .family = &fam_rcar_gen2, 129 .id = 0x4b, 130 }; 131 132 static const struct renesas_soc soc_rcar_e2 __initconst __maybe_unused = { 133 .family = &fam_rcar_gen2, 134 .id = 0x4c, 135 }; 136 137 static const struct renesas_soc soc_rcar_h3 __initconst __maybe_unused = { 138 .family = &fam_rcar_gen3, 139 .id = 0x4f, 140 }; 141 142 static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = { 143 .family = &fam_rcar_gen3, 144 .id = 0x52, 145 }; 146 147 static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = { 148 .family = &fam_shmobile, 149 .id = 0x37, 150 }; 151 152 153 static const struct of_device_id renesas_socs[] __initconst = { 154 #ifdef CONFIG_ARCH_R7S72100 155 { .compatible = "renesas,r7s72100", .data = &soc_rz_a1h }, 156 #endif 157 #ifdef CONFIG_ARCH_R8A73A4 158 { .compatible = "renesas,r8a73a4", .data = &soc_rmobile_ape6 }, 159 #endif 160 #ifdef CONFIG_ARCH_R8A7740 161 { .compatible = "renesas,r8a7740", .data = &soc_rmobile_a1 }, 162 #endif 163 #ifdef CONFIG_ARCH_R8A7742 164 { .compatible = "renesas,r8a7742", .data = &soc_rz_g1h }, 165 #endif 166 #ifdef CONFIG_ARCH_R8A7743 167 { .compatible = "renesas,r8a7743", .data = &soc_rz_g1m }, 168 #endif 169 #ifdef CONFIG_ARCH_R8A7744 170 { .compatible = "renesas,r8a7744", .data = &soc_rz_g1n }, 171 #endif 172 #ifdef CONFIG_ARCH_R8A7745 173 { .compatible = "renesas,r8a7745", .data = &soc_rz_g1e }, 174 #endif 175 #ifdef CONFIG_ARCH_R8A7778 176 { .compatible = "renesas,r8a7778", .data = &soc_rcar_m1a }, 177 #endif 178 #ifdef CONFIG_ARCH_R8A7779 179 { .compatible = "renesas,r8a7779", .data = &soc_rcar_h1 }, 180 #endif 181 #ifdef CONFIG_ARCH_R8A7790 182 { .compatible = "renesas,r8a7790", .data = &soc_rcar_h2 }, 183 #endif 184 #ifdef CONFIG_ARCH_R8A7791 185 { .compatible = "renesas,r8a7791", .data = &soc_rcar_m2_w }, 186 #endif 187 #ifdef CONFIG_ARCH_R8A7792 188 { .compatible = "renesas,r8a7792", .data = &soc_rcar_v2h }, 189 #endif 190 #ifdef CONFIG_ARCH_R8A7793 191 { .compatible = "renesas,r8a7793", .data = &soc_rcar_m2_n }, 192 #endif 193 #ifdef CONFIG_ARCH_R8A7794 194 { .compatible = "renesas,r8a7794", .data = &soc_rcar_e2 }, 195 #endif 196 #ifdef CONFIG_ARCH_R8A7795 197 { .compatible = "renesas,r8a7795", .data = &soc_rcar_h3 }, 198 #endif 199 #ifdef CONFIG_ARCH_R8A7796 200 { .compatible = "renesas,r8a7796", .data = &soc_rcar_m3_w }, 201 #endif 202 #ifdef CONFIG_ARCH_SH73A0 203 { .compatible = "renesas,sh73a0", .data = &soc_shmobile_ag5 }, 204 #endif 205 { /* sentinel */ } 206 }; 207 208 static int __init renesas_soc_init(void) 209 { 210 struct soc_device_attribute *soc_dev_attr; 211 const struct renesas_family *family; 212 const struct of_device_id *match; 213 const struct renesas_soc *soc; 214 void __iomem *chipid = NULL; 215 struct soc_device *soc_dev; 216 struct device_node *np; 217 unsigned int product; 218 219 match = of_match_node(renesas_socs, of_root); 220 if (!match) 221 return -ENODEV; 222 223 soc = match->data; 224 family = soc->family; 225 226 /* Try PRR first, then hardcoded fallback */ 227 np = of_find_compatible_node(NULL, NULL, "renesas,prr"); 228 if (np) { 229 chipid = of_iomap(np, 0); 230 of_node_put(np); 231 } else if (soc->id) { 232 chipid = ioremap(family->reg, 4); 233 } 234 if (chipid) { 235 product = readl(chipid); 236 iounmap(chipid); 237 if (soc->id && ((product >> 8) & 0xff) != soc->id) { 238 pr_warn("SoC mismatch (product = 0x%x)\n", product); 239 return -ENODEV; 240 } 241 } 242 243 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); 244 if (!soc_dev_attr) 245 return -ENOMEM; 246 247 np = of_find_node_by_path("/"); 248 of_property_read_string(np, "model", &soc_dev_attr->machine); 249 of_node_put(np); 250 251 soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL); 252 soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1, 253 GFP_KERNEL); 254 if (chipid) 255 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", 256 ((product >> 4) & 0x0f) + 1, 257 product & 0xf); 258 259 pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family, 260 soc_dev_attr->soc_id, soc_dev_attr->revision ?: ""); 261 262 soc_dev = soc_device_register(soc_dev_attr); 263 if (IS_ERR(soc_dev)) { 264 kfree(soc_dev_attr->revision); 265 kfree_const(soc_dev_attr->soc_id); 266 kfree_const(soc_dev_attr->family); 267 kfree(soc_dev_attr); 268 return PTR_ERR(soc_dev); 269 } 270 271 return 0; 272 } 273 early_initcall(renesas_soc_init); 274