1 /*
2 * Copyright (c) 2017 BayLibre, SAS
3 * Author: Neil Armstrong <narmstrong@baylibre.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8 #include <linux/io.h>
9 #include <linux/of.h>
10 #include <linux/of_address.h>
11 #include <linux/of_platform.h>
12 #include <linux/platform_device.h>
13 #include <linux/slab.h>
14 #include <linux/sys_soc.h>
15 #include <linux/bitfield.h>
16 #include <linux/regmap.h>
17 #include <linux/mfd/syscon.h>
18
19 #define AO_SEC_SD_CFG8 0xe0
20 #define AO_SEC_SOCINFO_OFFSET AO_SEC_SD_CFG8
21
22 #define SOCINFO_MAJOR GENMASK(31, 24)
23 #define SOCINFO_PACK GENMASK(23, 16)
24 #define SOCINFO_MINOR GENMASK(15, 8)
25 #define SOCINFO_MISC GENMASK(7, 0)
26
27 static const struct meson_gx_soc_id {
28 const char *name;
29 unsigned int id;
30 } soc_ids[] = {
31 { "GXBB", 0x1f },
32 { "GXTVBB", 0x20 },
33 { "GXL", 0x21 },
34 { "GXM", 0x22 },
35 { "TXL", 0x23 },
36 { "TXLX", 0x24 },
37 { "AXG", 0x25 },
38 { "GXLX", 0x26 },
39 { "TXHD", 0x27 },
40 { "G12A", 0x28 },
41 { "G12B", 0x29 },
42 { "SM1", 0x2b },
43 { "A1", 0x2c },
44 { "T7", 0x36 },
45 { "S4", 0x37 },
46 { "A5", 0x3c },
47 { "C3", 0x3d },
48 { "A4", 0x40 },
49 { "S7", 0x46 },
50 { "S7D", 0x47 },
51 { "S6", 0x48 },
52 };
53
54 static const struct meson_gx_package_id {
55 const char *name;
56 unsigned int major_id;
57 unsigned int pack_id;
58 unsigned int pack_mask;
59 } soc_packages[] = {
60 { "S905", 0x1f, 0, 0x20 }, /* pack_id != 0x20 */
61 { "S905H", 0x1f, 0x3, 0xf }, /* pack_id & 0xf == 0x3 */
62 { "S905M", 0x1f, 0x20, 0xf0 }, /* pack_id == 0x20 */
63 { "S905D", 0x21, 0, 0xf0 },
64 { "S905X", 0x21, 0x80, 0xf0 },
65 { "S905W", 0x21, 0xa0, 0xf0 },
66 { "S905L", 0x21, 0xc0, 0xf0 },
67 { "S905M2", 0x21, 0xe0, 0xf0 },
68 { "S805X", 0x21, 0x30, 0xf0 },
69 { "S805Y", 0x21, 0xb0, 0xf0 },
70 { "S912", 0x22, 0, 0x0 }, /* Only S912 is known for GXM */
71 { "962X", 0x24, 0x10, 0xf0 },
72 { "962E", 0x24, 0x20, 0xf0 },
73 { "A113X", 0x25, 0x37, 0xff },
74 { "A113X", 0x25, 0x43, 0xff },
75 { "A113D", 0x25, 0x22, 0xff },
76 { "S905L", 0x26, 0, 0x0 },
77 { "S905D2", 0x28, 0x10, 0xf0 },
78 { "S905Y2", 0x28, 0x30, 0xf0 },
79 { "S905X2", 0x28, 0x40, 0xf0 },
80 { "A311D", 0x29, 0x10, 0xf0 },
81 { "S922X", 0x29, 0x40, 0xf0 },
82 { "S905D3", 0x2b, 0x4, 0xf5 },
83 { "S905X3", 0x2b, 0x5, 0xf5 },
84 { "S905X3", 0x2b, 0x10, 0x3f },
85 { "S905D3", 0x2b, 0x30, 0x3f },
86 { "A113L", 0x2c, 0x0, 0xf8 },
87 { "S805X2", 0x37, 0x2, 0xf },
88 { "S905Y4", 0x37, 0x3, 0xf },
89 { "C308L", 0x3d, 0x1, 0xf },
90 { "A311D2", 0x36, 0x1, 0xf },
91 { "A113X2", 0x3c, 0x1, 0xf },
92 { "A113L2", 0x40, 0x1, 0xf },
93 { "S805X3", 0x46, 0x3, 0xf },
94 { "S905X5M", 0x47, 0x1, 0xf },
95 { "S905X5", 0x48, 0x1, 0xf },
96 };
97
socinfo_to_major(u32 socinfo)98 static inline unsigned int socinfo_to_major(u32 socinfo)
99 {
100 return FIELD_GET(SOCINFO_MAJOR, socinfo);
101 }
102
socinfo_to_minor(u32 socinfo)103 static inline unsigned int socinfo_to_minor(u32 socinfo)
104 {
105 return FIELD_GET(SOCINFO_MINOR, socinfo);
106 }
107
socinfo_to_pack(u32 socinfo)108 static inline unsigned int socinfo_to_pack(u32 socinfo)
109 {
110 return FIELD_GET(SOCINFO_PACK, socinfo);
111 }
112
socinfo_to_misc(u32 socinfo)113 static inline unsigned int socinfo_to_misc(u32 socinfo)
114 {
115 return FIELD_GET(SOCINFO_MISC, socinfo);
116 }
117
socinfo_to_package_id(u32 socinfo)118 static const char *socinfo_to_package_id(u32 socinfo)
119 {
120 unsigned int pack = socinfo_to_pack(socinfo);
121 unsigned int major = socinfo_to_major(socinfo);
122 int i;
123
124 for (i = 0 ; i < ARRAY_SIZE(soc_packages) ; ++i) {
125 if (soc_packages[i].major_id == major &&
126 soc_packages[i].pack_id ==
127 (pack & soc_packages[i].pack_mask))
128 return soc_packages[i].name;
129 }
130
131 return "Unknown";
132 }
133
socinfo_to_soc_id(u32 socinfo)134 static const char *socinfo_to_soc_id(u32 socinfo)
135 {
136 unsigned int id = socinfo_to_major(socinfo);
137 int i;
138
139 for (i = 0 ; i < ARRAY_SIZE(soc_ids) ; ++i) {
140 if (soc_ids[i].id == id)
141 return soc_ids[i].name;
142 }
143
144 return "Unknown";
145 }
146
meson_gx_socinfo_init(void)147 static int __init meson_gx_socinfo_init(void)
148 {
149 struct soc_device_attribute *soc_dev_attr;
150 struct soc_device *soc_dev;
151 struct device_node *np;
152 struct regmap *regmap;
153 unsigned int socinfo;
154 struct device *dev;
155 int ret;
156
157 /* look up for chipid node */
158 np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gx-ao-secure");
159 if (!np)
160 return -ENODEV;
161
162 /* check if interface is enabled */
163 if (!of_device_is_available(np)) {
164 of_node_put(np);
165 return -ENODEV;
166 }
167
168 /* check if chip-id is available */
169 if (!of_property_read_bool(np, "amlogic,has-chip-id")) {
170 of_node_put(np);
171 return -ENODEV;
172 }
173
174 /* node should be a syscon */
175 regmap = syscon_node_to_regmap(np);
176 of_node_put(np);
177 if (IS_ERR(regmap)) {
178 pr_err("%s: failed to get regmap\n", __func__);
179 return -ENODEV;
180 }
181
182 ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo);
183 if (ret < 0)
184 return ret;
185
186 if (!socinfo) {
187 pr_err("%s: invalid chipid value\n", __func__);
188 return -EINVAL;
189 }
190
191 soc_dev_attr = kzalloc_obj(*soc_dev_attr);
192 if (!soc_dev_attr)
193 return -ENODEV;
194
195 soc_dev_attr->family = "Amlogic Meson";
196 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x:%x - %x:%x",
197 socinfo_to_major(socinfo),
198 socinfo_to_minor(socinfo),
199 socinfo_to_pack(socinfo),
200 socinfo_to_misc(socinfo));
201 soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%s (%s)",
202 socinfo_to_soc_id(socinfo),
203 socinfo_to_package_id(socinfo));
204
205 soc_dev = soc_device_register(soc_dev_attr);
206 if (IS_ERR(soc_dev)) {
207 kfree(soc_dev_attr->revision);
208 kfree_const(soc_dev_attr->soc_id);
209 kfree(soc_dev_attr);
210 return PTR_ERR(soc_dev);
211 }
212 dev = soc_device_to_device(soc_dev);
213
214 dev_info(dev, "Amlogic Meson %s Revision %x:%x (%x:%x) Detected\n",
215 soc_dev_attr->soc_id,
216 socinfo_to_major(socinfo),
217 socinfo_to_minor(socinfo),
218 socinfo_to_pack(socinfo),
219 socinfo_to_misc(socinfo));
220
221 return 0;
222 }
223 device_initcall(meson_gx_socinfo_init);
224