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_rzg2l __initconst __maybe_unused = {
60 .name = "RZ/G2L",
61 };
62
63 static const struct renesas_family fam_shmobile __initconst __maybe_unused = {
64 .name = "SH-Mobile",
65 .reg = 0xe600101c, /* CCCR (Common Chip Code Register) */
66 };
67
68
69 struct renesas_soc {
70 const struct renesas_family *family;
71 u32 id;
72 };
73
74 static const struct renesas_soc soc_rz_a1h __initconst __maybe_unused = {
75 .family = &fam_rza1,
76 };
77
78 static const struct renesas_soc soc_rz_a2m __initconst __maybe_unused = {
79 .family = &fam_rza2,
80 .id = 0x3b,
81 };
82
83 static const struct renesas_soc soc_rmobile_ape6 __initconst __maybe_unused = {
84 .family = &fam_rmobile,
85 .id = 0x3f,
86 };
87
88 static const struct renesas_soc soc_rmobile_a1 __initconst __maybe_unused = {
89 .family = &fam_rmobile,
90 .id = 0x40,
91 };
92
93 static const struct renesas_soc soc_rz_g1h __initconst __maybe_unused = {
94 .family = &fam_rzg1,
95 .id = 0x45,
96 };
97
98 static const struct renesas_soc soc_rz_g1m __initconst __maybe_unused = {
99 .family = &fam_rzg1,
100 .id = 0x47,
101 };
102
103 static const struct renesas_soc soc_rz_g1n __initconst __maybe_unused = {
104 .family = &fam_rzg1,
105 .id = 0x4b,
106 };
107
108 static const struct renesas_soc soc_rz_g1e __initconst __maybe_unused = {
109 .family = &fam_rzg1,
110 .id = 0x4c,
111 };
112
113 static const struct renesas_soc soc_rz_g1c __initconst __maybe_unused = {
114 .family = &fam_rzg1,
115 .id = 0x53,
116 };
117
118 static const struct renesas_soc soc_rz_g2m __initconst __maybe_unused = {
119 .family = &fam_rzg2,
120 .id = 0x52,
121 };
122
123 static const struct renesas_soc soc_rz_g2n __initconst __maybe_unused = {
124 .family = &fam_rzg2,
125 .id = 0x55,
126 };
127
128 static const struct renesas_soc soc_rz_g2e __initconst __maybe_unused = {
129 .family = &fam_rzg2,
130 .id = 0x57,
131 };
132
133 static const struct renesas_soc soc_rz_g2h __initconst __maybe_unused = {
134 .family = &fam_rzg2,
135 .id = 0x4f,
136 };
137
138 static const struct renesas_soc soc_rz_g2l __initconst __maybe_unused = {
139 .family = &fam_rzg2l,
140 .id = 0x841c447,
141 };
142
143 static const struct renesas_soc soc_rcar_m1a __initconst __maybe_unused = {
144 .family = &fam_rcar_gen1,
145 };
146
147 static const struct renesas_soc soc_rcar_h1 __initconst __maybe_unused = {
148 .family = &fam_rcar_gen1,
149 .id = 0x3b,
150 };
151
152 static const struct renesas_soc soc_rcar_h2 __initconst __maybe_unused = {
153 .family = &fam_rcar_gen2,
154 .id = 0x45,
155 };
156
157 static const struct renesas_soc soc_rcar_m2_w __initconst __maybe_unused = {
158 .family = &fam_rcar_gen2,
159 .id = 0x47,
160 };
161
162 static const struct renesas_soc soc_rcar_v2h __initconst __maybe_unused = {
163 .family = &fam_rcar_gen2,
164 .id = 0x4a,
165 };
166
167 static const struct renesas_soc soc_rcar_m2_n __initconst __maybe_unused = {
168 .family = &fam_rcar_gen2,
169 .id = 0x4b,
170 };
171
172 static const struct renesas_soc soc_rcar_e2 __initconst __maybe_unused = {
173 .family = &fam_rcar_gen2,
174 .id = 0x4c,
175 };
176
177 static const struct renesas_soc soc_rcar_h3 __initconst __maybe_unused = {
178 .family = &fam_rcar_gen3,
179 .id = 0x4f,
180 };
181
182 static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = {
183 .family = &fam_rcar_gen3,
184 .id = 0x52,
185 };
186
187 static const struct renesas_soc soc_rcar_m3_n __initconst __maybe_unused = {
188 .family = &fam_rcar_gen3,
189 .id = 0x55,
190 };
191
192 static const struct renesas_soc soc_rcar_v3m __initconst __maybe_unused = {
193 .family = &fam_rcar_gen3,
194 .id = 0x54,
195 };
196
197 static const struct renesas_soc soc_rcar_v3h __initconst __maybe_unused = {
198 .family = &fam_rcar_gen3,
199 .id = 0x56,
200 };
201
202 static const struct renesas_soc soc_rcar_e3 __initconst __maybe_unused = {
203 .family = &fam_rcar_gen3,
204 .id = 0x57,
205 };
206
207 static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = {
208 .family = &fam_rcar_gen3,
209 .id = 0x58,
210 };
211
212 static const struct renesas_soc soc_rcar_v3u __initconst __maybe_unused = {
213 .family = &fam_rcar_gen3,
214 .id = 0x59,
215 };
216
217 static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = {
218 .family = &fam_shmobile,
219 .id = 0x37,
220 };
221
222
223 static 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_R8A77951
288 { .compatible = "renesas,r8a779m1", .data = &soc_rcar_h3 },
289 #endif
290 #ifdef CONFIG_ARCH_R8A77960
291 { .compatible = "renesas,r8a7796", .data = &soc_rcar_m3_w },
292 #endif
293 #ifdef CONFIG_ARCH_R8A77961
294 { .compatible = "renesas,r8a77961", .data = &soc_rcar_m3_w },
295 { .compatible = "renesas,r8a779m3", .data = &soc_rcar_m3_w },
296 #endif
297 #ifdef CONFIG_ARCH_R8A77965
298 { .compatible = "renesas,r8a77965", .data = &soc_rcar_m3_n },
299 #endif
300 #ifdef CONFIG_ARCH_R8A77970
301 { .compatible = "renesas,r8a77970", .data = &soc_rcar_v3m },
302 #endif
303 #ifdef CONFIG_ARCH_R8A77980
304 { .compatible = "renesas,r8a77980", .data = &soc_rcar_v3h },
305 #endif
306 #ifdef CONFIG_ARCH_R8A77990
307 { .compatible = "renesas,r8a77990", .data = &soc_rcar_e3 },
308 #endif
309 #ifdef CONFIG_ARCH_R8A77995
310 { .compatible = "renesas,r8a77995", .data = &soc_rcar_d3 },
311 #endif
312 #ifdef CONFIG_ARCH_R8A779A0
313 { .compatible = "renesas,r8a779a0", .data = &soc_rcar_v3u },
314 #endif
315 #if defined(CONFIG_ARCH_R9A07G044)
316 { .compatible = "renesas,r9a07g044", .data = &soc_rz_g2l },
317 #endif
318 #ifdef CONFIG_ARCH_SH73A0
319 { .compatible = "renesas,sh73a0", .data = &soc_shmobile_ag5 },
320 #endif
321 { /* sentinel */ }
322 };
323
renesas_soc_init(void)324 static int __init renesas_soc_init(void)
325 {
326 struct soc_device_attribute *soc_dev_attr;
327 const struct renesas_family *family;
328 const struct of_device_id *match;
329 const struct renesas_soc *soc;
330 void __iomem *chipid = NULL;
331 struct soc_device *soc_dev;
332 struct device_node *np;
333 unsigned int product, eshi = 0, eslo;
334
335 match = of_match_node(renesas_socs, of_root);
336 if (!match)
337 return -ENODEV;
338
339 soc = match->data;
340 family = soc->family;
341
342 np = of_find_compatible_node(NULL, NULL, "renesas,bsid");
343 if (np) {
344 chipid = of_iomap(np, 0);
345 of_node_put(np);
346
347 if (chipid) {
348 product = readl(chipid);
349 iounmap(chipid);
350
351 if (soc->id && ((product >> 16) & 0xff) != soc->id) {
352 pr_warn("SoC mismatch (product = 0x%x)\n",
353 product);
354 return -ENODEV;
355 }
356 }
357
358 /*
359 * TODO: Upper 4 bits of BSID are for chip version, but the
360 * format is not known at this time so we don't know how to
361 * specify eshi and eslo
362 */
363
364 goto done;
365 }
366
367 np = of_find_compatible_node(NULL, NULL, "renesas,r9a07g044-sysc");
368 if (np) {
369 chipid = of_iomap(np, 0);
370 of_node_put(np);
371
372 if (chipid) {
373 product = readl(chipid + 0x0a04);
374 iounmap(chipid);
375
376 if (soc->id && (product & 0xfffffff) != soc->id) {
377 pr_warn("SoC mismatch (product = 0x%x)\n",
378 product);
379 return -ENODEV;
380 }
381 }
382
383 goto done;
384 }
385
386 /* Try PRR first, then hardcoded fallback */
387 np = of_find_compatible_node(NULL, NULL, "renesas,prr");
388 if (np) {
389 chipid = of_iomap(np, 0);
390 of_node_put(np);
391 } else if (soc->id && family->reg) {
392 chipid = ioremap(family->reg, 4);
393 }
394 if (chipid) {
395 product = readl(chipid);
396 iounmap(chipid);
397 /* R-Car M3-W ES1.1 incorrectly identifies as ES2.0 */
398 if ((product & 0x7fff) == 0x5210)
399 product ^= 0x11;
400 /* R-Car M3-W ES1.3 incorrectly identifies as ES2.1 */
401 if ((product & 0x7fff) == 0x5211)
402 product ^= 0x12;
403 if (soc->id && ((product >> 8) & 0xff) != soc->id) {
404 pr_warn("SoC mismatch (product = 0x%x)\n", product);
405 return -ENODEV;
406 }
407 eshi = ((product >> 4) & 0x0f) + 1;
408 eslo = product & 0xf;
409 }
410
411 done:
412 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
413 if (!soc_dev_attr)
414 return -ENOMEM;
415
416 np = of_find_node_by_path("/");
417 of_property_read_string(np, "model", &soc_dev_attr->machine);
418 of_node_put(np);
419
420 soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL);
421 soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1,
422 GFP_KERNEL);
423 if (eshi)
424 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", eshi,
425 eslo);
426
427 pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family,
428 soc_dev_attr->soc_id, soc_dev_attr->revision ?: "");
429
430 soc_dev = soc_device_register(soc_dev_attr);
431 if (IS_ERR(soc_dev)) {
432 kfree(soc_dev_attr->revision);
433 kfree_const(soc_dev_attr->soc_id);
434 kfree_const(soc_dev_attr->family);
435 kfree(soc_dev_attr);
436 return PTR_ERR(soc_dev);
437 }
438
439 return 0;
440 }
441 early_initcall(renesas_soc_init);
442