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_rz_g2h __initconst __maybe_unused = {
130 .family = &fam_rzg2,
131 .id = 0x4f,
132 };
133
134 static const struct renesas_soc soc_rcar_m1a __initconst __maybe_unused = {
135 .family = &fam_rcar_gen1,
136 };
137
138 static const struct renesas_soc soc_rcar_h1 __initconst __maybe_unused = {
139 .family = &fam_rcar_gen1,
140 .id = 0x3b,
141 };
142
143 static const struct renesas_soc soc_rcar_h2 __initconst __maybe_unused = {
144 .family = &fam_rcar_gen2,
145 .id = 0x45,
146 };
147
148 static const struct renesas_soc soc_rcar_m2_w __initconst __maybe_unused = {
149 .family = &fam_rcar_gen2,
150 .id = 0x47,
151 };
152
153 static const struct renesas_soc soc_rcar_v2h __initconst __maybe_unused = {
154 .family = &fam_rcar_gen2,
155 .id = 0x4a,
156 };
157
158 static const struct renesas_soc soc_rcar_m2_n __initconst __maybe_unused = {
159 .family = &fam_rcar_gen2,
160 .id = 0x4b,
161 };
162
163 static const struct renesas_soc soc_rcar_e2 __initconst __maybe_unused = {
164 .family = &fam_rcar_gen2,
165 .id = 0x4c,
166 };
167
168 static const struct renesas_soc soc_rcar_h3 __initconst __maybe_unused = {
169 .family = &fam_rcar_gen3,
170 .id = 0x4f,
171 };
172
173 static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = {
174 .family = &fam_rcar_gen3,
175 .id = 0x52,
176 };
177
178 static const struct renesas_soc soc_rcar_m3_n __initconst __maybe_unused = {
179 .family = &fam_rcar_gen3,
180 .id = 0x55,
181 };
182
183 static const struct renesas_soc soc_rcar_v3m __initconst __maybe_unused = {
184 .family = &fam_rcar_gen3,
185 .id = 0x54,
186 };
187
188 static const struct renesas_soc soc_rcar_v3h __initconst __maybe_unused = {
189 .family = &fam_rcar_gen3,
190 .id = 0x56,
191 };
192
193 static const struct renesas_soc soc_rcar_e3 __initconst __maybe_unused = {
194 .family = &fam_rcar_gen3,
195 .id = 0x57,
196 };
197
198 static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = {
199 .family = &fam_rcar_gen3,
200 .id = 0x58,
201 };
202
203 static const struct renesas_soc soc_rcar_v3u __initconst __maybe_unused = {
204 .family = &fam_rcar_gen3,
205 .id = 0x59,
206 };
207
208 static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = {
209 .family = &fam_shmobile,
210 .id = 0x37,
211 };
212
213
214 static const struct of_device_id renesas_socs[] __initconst = {
215 #ifdef CONFIG_ARCH_R7S72100
216 { .compatible = "renesas,r7s72100", .data = &soc_rz_a1h },
217 #endif
218 #ifdef CONFIG_ARCH_R7S9210
219 { .compatible = "renesas,r7s9210", .data = &soc_rz_a2m },
220 #endif
221 #ifdef CONFIG_ARCH_R8A73A4
222 { .compatible = "renesas,r8a73a4", .data = &soc_rmobile_ape6 },
223 #endif
224 #ifdef CONFIG_ARCH_R8A7740
225 { .compatible = "renesas,r8a7740", .data = &soc_rmobile_a1 },
226 #endif
227 #ifdef CONFIG_ARCH_R8A7742
228 { .compatible = "renesas,r8a7742", .data = &soc_rz_g1h },
229 #endif
230 #ifdef CONFIG_ARCH_R8A7743
231 { .compatible = "renesas,r8a7743", .data = &soc_rz_g1m },
232 #endif
233 #ifdef CONFIG_ARCH_R8A7744
234 { .compatible = "renesas,r8a7744", .data = &soc_rz_g1n },
235 #endif
236 #ifdef CONFIG_ARCH_R8A7745
237 { .compatible = "renesas,r8a7745", .data = &soc_rz_g1e },
238 #endif
239 #ifdef CONFIG_ARCH_R8A77470
240 { .compatible = "renesas,r8a77470", .data = &soc_rz_g1c },
241 #endif
242 #ifdef CONFIG_ARCH_R8A774A1
243 { .compatible = "renesas,r8a774a1", .data = &soc_rz_g2m },
244 #endif
245 #ifdef CONFIG_ARCH_R8A774B1
246 { .compatible = "renesas,r8a774b1", .data = &soc_rz_g2n },
247 #endif
248 #ifdef CONFIG_ARCH_R8A774C0
249 { .compatible = "renesas,r8a774c0", .data = &soc_rz_g2e },
250 #endif
251 #ifdef CONFIG_ARCH_R8A774E1
252 { .compatible = "renesas,r8a774e1", .data = &soc_rz_g2h },
253 #endif
254 #ifdef CONFIG_ARCH_R8A7778
255 { .compatible = "renesas,r8a7778", .data = &soc_rcar_m1a },
256 #endif
257 #ifdef CONFIG_ARCH_R8A7779
258 { .compatible = "renesas,r8a7779", .data = &soc_rcar_h1 },
259 #endif
260 #ifdef CONFIG_ARCH_R8A7790
261 { .compatible = "renesas,r8a7790", .data = &soc_rcar_h2 },
262 #endif
263 #ifdef CONFIG_ARCH_R8A7791
264 { .compatible = "renesas,r8a7791", .data = &soc_rcar_m2_w },
265 #endif
266 #ifdef CONFIG_ARCH_R8A7792
267 { .compatible = "renesas,r8a7792", .data = &soc_rcar_v2h },
268 #endif
269 #ifdef CONFIG_ARCH_R8A7793
270 { .compatible = "renesas,r8a7793", .data = &soc_rcar_m2_n },
271 #endif
272 #ifdef CONFIG_ARCH_R8A7794
273 { .compatible = "renesas,r8a7794", .data = &soc_rcar_e2 },
274 #endif
275 #if defined(CONFIG_ARCH_R8A77950) || defined(CONFIG_ARCH_R8A77951)
276 { .compatible = "renesas,r8a7795", .data = &soc_rcar_h3 },
277 #endif
278 #ifdef CONFIG_ARCH_R8A77960
279 { .compatible = "renesas,r8a7796", .data = &soc_rcar_m3_w },
280 #endif
281 #ifdef CONFIG_ARCH_R8A77961
282 { .compatible = "renesas,r8a77961", .data = &soc_rcar_m3_w },
283 #endif
284 #ifdef CONFIG_ARCH_R8A77965
285 { .compatible = "renesas,r8a77965", .data = &soc_rcar_m3_n },
286 #endif
287 #ifdef CONFIG_ARCH_R8A77970
288 { .compatible = "renesas,r8a77970", .data = &soc_rcar_v3m },
289 #endif
290 #ifdef CONFIG_ARCH_R8A77980
291 { .compatible = "renesas,r8a77980", .data = &soc_rcar_v3h },
292 #endif
293 #ifdef CONFIG_ARCH_R8A77990
294 { .compatible = "renesas,r8a77990", .data = &soc_rcar_e3 },
295 #endif
296 #ifdef CONFIG_ARCH_R8A77995
297 { .compatible = "renesas,r8a77995", .data = &soc_rcar_d3 },
298 #endif
299 #ifdef CONFIG_ARCH_R8A779A0
300 { .compatible = "renesas,r8a779a0", .data = &soc_rcar_v3u },
301 #endif
302 #ifdef CONFIG_ARCH_SH73A0
303 { .compatible = "renesas,sh73a0", .data = &soc_shmobile_ag5 },
304 #endif
305 { /* sentinel */ }
306 };
307
renesas_soc_init(void)308 static int __init renesas_soc_init(void)
309 {
310 struct soc_device_attribute *soc_dev_attr;
311 const struct renesas_family *family;
312 const struct of_device_id *match;
313 const struct renesas_soc *soc;
314 void __iomem *chipid = NULL;
315 struct soc_device *soc_dev;
316 struct device_node *np;
317 unsigned int product, eshi = 0, eslo;
318
319 match = of_match_node(renesas_socs, of_root);
320 if (!match)
321 return -ENODEV;
322
323 soc = match->data;
324 family = soc->family;
325
326 np = of_find_compatible_node(NULL, NULL, "renesas,bsid");
327 if (np) {
328 chipid = of_iomap(np, 0);
329 of_node_put(np);
330
331 if (chipid) {
332 product = readl(chipid);
333 iounmap(chipid);
334
335 if (soc->id && ((product >> 16) & 0xff) != soc->id) {
336 pr_warn("SoC mismatch (product = 0x%x)\n",
337 product);
338 return -ENODEV;
339 }
340 }
341
342 /*
343 * TODO: Upper 4 bits of BSID are for chip version, but the
344 * format is not known at this time so we don't know how to
345 * specify eshi and eslo
346 */
347
348 goto done;
349 }
350
351 /* Try PRR first, then hardcoded fallback */
352 np = of_find_compatible_node(NULL, NULL, "renesas,prr");
353 if (np) {
354 chipid = of_iomap(np, 0);
355 of_node_put(np);
356 } else if (soc->id && family->reg) {
357 chipid = ioremap(family->reg, 4);
358 }
359 if (chipid) {
360 product = readl(chipid);
361 iounmap(chipid);
362 /* R-Car M3-W ES1.1 incorrectly identifies as ES2.0 */
363 if ((product & 0x7fff) == 0x5210)
364 product ^= 0x11;
365 /* R-Car M3-W ES1.3 incorrectly identifies as ES2.1 */
366 if ((product & 0x7fff) == 0x5211)
367 product ^= 0x12;
368 if (soc->id && ((product >> 8) & 0xff) != soc->id) {
369 pr_warn("SoC mismatch (product = 0x%x)\n", product);
370 return -ENODEV;
371 }
372 eshi = ((product >> 4) & 0x0f) + 1;
373 eslo = product & 0xf;
374 }
375
376 done:
377 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
378 if (!soc_dev_attr)
379 return -ENOMEM;
380
381 np = of_find_node_by_path("/");
382 of_property_read_string(np, "model", &soc_dev_attr->machine);
383 of_node_put(np);
384
385 soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL);
386 soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1,
387 GFP_KERNEL);
388 if (eshi)
389 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", eshi,
390 eslo);
391
392 pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family,
393 soc_dev_attr->soc_id, soc_dev_attr->revision ?: "");
394
395 soc_dev = soc_device_register(soc_dev_attr);
396 if (IS_ERR(soc_dev)) {
397 kfree(soc_dev_attr->revision);
398 kfree_const(soc_dev_attr->soc_id);
399 kfree_const(soc_dev_attr->family);
400 kfree(soc_dev_attr);
401 return PTR_ERR(soc_dev);
402 }
403
404 return 0;
405 }
406 early_initcall(renesas_soc_init);
407