tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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);