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_rcar_d3 __initconst __maybe_unused = {
148 .family = &fam_rcar_gen3,
149 .id = 0x58,
150 };
151
152 static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = {
153 .family = &fam_shmobile,
154 .id = 0x37,
155 };
156
157
158 static const struct of_device_id renesas_socs[] __initconst = {
159 #ifdef CONFIG_ARCH_R7S72100
160 { .compatible = "renesas,r7s72100", .data = &soc_rz_a1h },
161 #endif
162 #ifdef CONFIG_ARCH_R8A73A4
163 { .compatible = "renesas,r8a73a4", .data = &soc_rmobile_ape6 },
164 #endif
165 #ifdef CONFIG_ARCH_R8A7740
166 { .compatible = "renesas,r8a7740", .data = &soc_rmobile_a1 },
167 #endif
168 #ifdef CONFIG_ARCH_R8A7742
169 { .compatible = "renesas,r8a7742", .data = &soc_rz_g1h },
170 #endif
171 #ifdef CONFIG_ARCH_R8A7743
172 { .compatible = "renesas,r8a7743", .data = &soc_rz_g1m },
173 #endif
174 #ifdef CONFIG_ARCH_R8A7744
175 { .compatible = "renesas,r8a7744", .data = &soc_rz_g1n },
176 #endif
177 #ifdef CONFIG_ARCH_R8A7745
178 { .compatible = "renesas,r8a7745", .data = &soc_rz_g1e },
179 #endif
180 #ifdef CONFIG_ARCH_R8A7778
181 { .compatible = "renesas,r8a7778", .data = &soc_rcar_m1a },
182 #endif
183 #ifdef CONFIG_ARCH_R8A7779
184 { .compatible = "renesas,r8a7779", .data = &soc_rcar_h1 },
185 #endif
186 #ifdef CONFIG_ARCH_R8A7790
187 { .compatible = "renesas,r8a7790", .data = &soc_rcar_h2 },
188 #endif
189 #ifdef CONFIG_ARCH_R8A7791
190 { .compatible = "renesas,r8a7791", .data = &soc_rcar_m2_w },
191 #endif
192 #ifdef CONFIG_ARCH_R8A7792
193 { .compatible = "renesas,r8a7792", .data = &soc_rcar_v2h },
194 #endif
195 #ifdef CONFIG_ARCH_R8A7793
196 { .compatible = "renesas,r8a7793", .data = &soc_rcar_m2_n },
197 #endif
198 #ifdef CONFIG_ARCH_R8A7794
199 { .compatible = "renesas,r8a7794", .data = &soc_rcar_e2 },
200 #endif
201 #ifdef CONFIG_ARCH_R8A7795
202 { .compatible = "renesas,r8a7795", .data = &soc_rcar_h3 },
203 #endif
204 #ifdef CONFIG_ARCH_R8A7796
205 { .compatible = "renesas,r8a7796", .data = &soc_rcar_m3_w },
206 #endif
207 #ifdef CONFIG_ARCH_R8A77995
208 { .compatible = "renesas,r8a77995", .data = &soc_rcar_d3 },
209 #endif
210 #ifdef CONFIG_ARCH_SH73A0
211 { .compatible = "renesas,sh73a0", .data = &soc_shmobile_ag5 },
212 #endif
213 { /* sentinel */ }
214 };
215
renesas_soc_init(void)216 static int __init renesas_soc_init(void)
217 {
218 struct soc_device_attribute *soc_dev_attr;
219 const struct renesas_family *family;
220 const struct of_device_id *match;
221 const struct renesas_soc *soc;
222 void __iomem *chipid = NULL;
223 struct soc_device *soc_dev;
224 struct device_node *np;
225 unsigned int product;
226
227 match = of_match_node(renesas_socs, of_root);
228 if (!match)
229 return -ENODEV;
230
231 soc = match->data;
232 family = soc->family;
233
234 /* Try PRR first, then hardcoded fallback */
235 np = of_find_compatible_node(NULL, NULL, "renesas,prr");
236 if (np) {
237 chipid = of_iomap(np, 0);
238 of_node_put(np);
239 } else if (soc->id) {
240 chipid = ioremap(family->reg, 4);
241 }
242 if (chipid) {
243 product = readl(chipid);
244 iounmap(chipid);
245 if (soc->id && ((product >> 8) & 0xff) != soc->id) {
246 pr_warn("SoC mismatch (product = 0x%x)\n", product);
247 return -ENODEV;
248 }
249 }
250
251 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
252 if (!soc_dev_attr)
253 return -ENOMEM;
254
255 np = of_find_node_by_path("/");
256 of_property_read_string(np, "model", &soc_dev_attr->machine);
257 of_node_put(np);
258
259 soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL);
260 soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1,
261 GFP_KERNEL);
262 if (chipid)
263 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u",
264 ((product >> 4) & 0x0f) + 1,
265 product & 0xf);
266
267 pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family,
268 soc_dev_attr->soc_id, soc_dev_attr->revision ?: "");
269
270 soc_dev = soc_device_register(soc_dev_attr);
271 if (IS_ERR(soc_dev)) {
272 kfree(soc_dev_attr->revision);
273 kfree_const(soc_dev_attr->soc_id);
274 kfree_const(soc_dev_attr->family);
275 kfree(soc_dev_attr);
276 return PTR_ERR(soc_dev);
277 }
278
279 return 0;
280 }
281 early_initcall(renesas_soc_init);
282