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_shmobile __initconst __maybe_unused = {
60	.name	= "SH-Mobile",
61	.reg	= 0xe600101c,		/* CCCR (Common Chip Code Register) */
62};
63
64
65struct renesas_soc {
66	const struct renesas_family *family;
67	u8 id;
68};
69
70static const struct renesas_soc soc_rz_a1h __initconst __maybe_unused = {
71	.family	= &fam_rza1,
72};
73
74static const struct renesas_soc soc_rz_a2m __initconst __maybe_unused = {
75	.family	= &fam_rza2,
76	.id	= 0x3b,
77};
78
79static const struct renesas_soc soc_rmobile_ape6 __initconst __maybe_unused = {
80	.family	= &fam_rmobile,
81	.id	= 0x3f,
82};
83
84static const struct renesas_soc soc_rmobile_a1 __initconst __maybe_unused = {
85	.family	= &fam_rmobile,
86	.id	= 0x40,
87};
88
89static const struct renesas_soc soc_rz_g1h __initconst __maybe_unused = {
90	.family	= &fam_rzg1,
91	.id	= 0x45,
92};
93
94static const struct renesas_soc soc_rz_g1m __initconst __maybe_unused = {
95	.family	= &fam_rzg1,
96	.id	= 0x47,
97};
98
99static const struct renesas_soc soc_rz_g1n __initconst __maybe_unused = {
100	.family	= &fam_rzg1,
101	.id	= 0x4b,
102};
103
104static const struct renesas_soc soc_rz_g1e __initconst __maybe_unused = {
105	.family	= &fam_rzg1,
106	.id	= 0x4c,
107};
108
109static const struct renesas_soc soc_rz_g1c __initconst __maybe_unused = {
110	.family	= &fam_rzg1,
111	.id	= 0x53,
112};
113
114static const struct renesas_soc soc_rz_g2m __initconst __maybe_unused = {
115	.family	= &fam_rzg2,
116	.id	= 0x52,
117};
118
119static const struct renesas_soc soc_rz_g2n __initconst __maybe_unused = {
120	.family = &fam_rzg2,
121	.id     = 0x55,
122};
123
124static const struct renesas_soc soc_rz_g2e __initconst __maybe_unused = {
125	.family	= &fam_rzg2,
126	.id	= 0x57,
127};
128
129static const struct renesas_soc soc_rz_g2h __initconst __maybe_unused = {
130	.family	= &fam_rzg2,
131	.id	= 0x4f,
132};
133
134static const struct renesas_soc soc_rcar_m1a __initconst __maybe_unused = {
135	.family	= &fam_rcar_gen1,
136};
137
138static const struct renesas_soc soc_rcar_h1 __initconst __maybe_unused = {
139	.family	= &fam_rcar_gen1,
140	.id	= 0x3b,
141};
142
143static const struct renesas_soc soc_rcar_h2 __initconst __maybe_unused = {
144	.family	= &fam_rcar_gen2,
145	.id	= 0x45,
146};
147
148static const struct renesas_soc soc_rcar_m2_w __initconst __maybe_unused = {
149	.family	= &fam_rcar_gen2,
150	.id	= 0x47,
151};
152
153static const struct renesas_soc soc_rcar_v2h __initconst __maybe_unused = {
154	.family	= &fam_rcar_gen2,
155	.id	= 0x4a,
156};
157
158static const struct renesas_soc soc_rcar_m2_n __initconst __maybe_unused = {
159	.family	= &fam_rcar_gen2,
160	.id	= 0x4b,
161};
162
163static const struct renesas_soc soc_rcar_e2 __initconst __maybe_unused = {
164	.family	= &fam_rcar_gen2,
165	.id	= 0x4c,
166};
167
168static const struct renesas_soc soc_rcar_h3 __initconst __maybe_unused = {
169	.family	= &fam_rcar_gen3,
170	.id	= 0x4f,
171};
172
173static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = {
174	.family	= &fam_rcar_gen3,
175	.id	= 0x52,
176};
177
178static const struct renesas_soc soc_rcar_m3_n __initconst __maybe_unused = {
179	.family = &fam_rcar_gen3,
180	.id     = 0x55,
181};
182
183static const struct renesas_soc soc_rcar_v3m __initconst __maybe_unused = {
184	.family	= &fam_rcar_gen3,
185	.id	= 0x54,
186};
187
188static const struct renesas_soc soc_rcar_v3h __initconst __maybe_unused = {
189	.family	= &fam_rcar_gen3,
190	.id	= 0x56,
191};
192
193static const struct renesas_soc soc_rcar_e3 __initconst __maybe_unused = {
194	.family	= &fam_rcar_gen3,
195	.id	= 0x57,
196};
197
198static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = {
199	.family	= &fam_rcar_gen3,
200	.id	= 0x58,
201};
202
203static const struct renesas_soc soc_rcar_v3u __initconst __maybe_unused = {
204	.family	= &fam_rcar_gen3,
205	.id	= 0x59,
206};
207
208static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = {
209	.family	= &fam_shmobile,
210	.id	= 0x37,
211};
212
213
214static 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
308static 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
376done:
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}
406early_initcall(renesas_soc_init);
407