media: rp1: cfe: Actually use the number of lanes configured
[platform/kernel/linux-rpi.git] / drivers / soc / amlogic / meson-gx-socinfo.c
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 };
45
46 static const struct meson_gx_package_id {
47         const char *name;
48         unsigned int major_id;
49         unsigned int pack_id;
50         unsigned int pack_mask;
51 } soc_packages[] = {
52         { "S905", 0x1f, 0, 0x20 }, /* pack_id != 0x20 */
53         { "S905H", 0x1f, 0x3, 0xf }, /* pack_id & 0xf == 0x3 */
54         { "S905M", 0x1f, 0x20, 0xf0 }, /* pack_id == 0x20 */
55         { "S905D", 0x21, 0, 0xf0 },
56         { "S905X", 0x21, 0x80, 0xf0 },
57         { "S905W", 0x21, 0xa0, 0xf0 },
58         { "S905L", 0x21, 0xc0, 0xf0 },
59         { "S905M2", 0x21, 0xe0, 0xf0 },
60         { "S805X", 0x21, 0x30, 0xf0 },
61         { "S805Y", 0x21, 0xb0, 0xf0 },
62         { "S912", 0x22, 0, 0x0 }, /* Only S912 is known for GXM */
63         { "962X", 0x24, 0x10, 0xf0 },
64         { "962E", 0x24, 0x20, 0xf0 },
65         { "A113X", 0x25, 0x37, 0xff },
66         { "A113D", 0x25, 0x22, 0xff },
67         { "S905D2", 0x28, 0x10, 0xf0 },
68         { "S905Y2", 0x28, 0x30, 0xf0 },
69         { "S905X2", 0x28, 0x40, 0xf0 },
70         { "A311D", 0x29, 0x10, 0xf0 },
71         { "S922X", 0x29, 0x40, 0xf0 },
72         { "S905D3", 0x2b, 0x4, 0xf5 },
73         { "S905X3", 0x2b, 0x5, 0xf5 },
74         { "S905X3", 0x2b, 0x10, 0x3f },
75         { "S905D3", 0x2b, 0x30, 0x3f },
76         { "A113L", 0x2c, 0x0, 0xf8 },
77 };
78
79 static inline unsigned int socinfo_to_major(u32 socinfo)
80 {
81         return FIELD_GET(SOCINFO_MAJOR, socinfo);
82 }
83
84 static inline unsigned int socinfo_to_minor(u32 socinfo)
85 {
86         return FIELD_GET(SOCINFO_MINOR, socinfo);
87 }
88
89 static inline unsigned int socinfo_to_pack(u32 socinfo)
90 {
91         return FIELD_GET(SOCINFO_PACK, socinfo);
92 }
93
94 static inline unsigned int socinfo_to_misc(u32 socinfo)
95 {
96         return FIELD_GET(SOCINFO_MISC, socinfo);
97 }
98
99 static const char *socinfo_to_package_id(u32 socinfo)
100 {
101         unsigned int pack = socinfo_to_pack(socinfo);
102         unsigned int major = socinfo_to_major(socinfo);
103         int i;
104
105         for (i = 0 ; i < ARRAY_SIZE(soc_packages) ; ++i) {
106                 if (soc_packages[i].major_id == major &&
107                     soc_packages[i].pack_id ==
108                                 (pack & soc_packages[i].pack_mask))
109                         return soc_packages[i].name;
110         }
111
112         return "Unknown";
113 }
114
115 static const char *socinfo_to_soc_id(u32 socinfo)
116 {
117         unsigned int id = socinfo_to_major(socinfo);
118         int i;
119
120         for (i = 0 ; i < ARRAY_SIZE(soc_ids) ; ++i) {
121                 if (soc_ids[i].id == id)
122                         return soc_ids[i].name;
123         }
124
125         return "Unknown";
126 }
127
128 static int __init meson_gx_socinfo_init(void)
129 {
130         struct soc_device_attribute *soc_dev_attr;
131         struct soc_device *soc_dev;
132         struct device_node *np;
133         struct regmap *regmap;
134         unsigned int socinfo;
135         struct device *dev;
136         int ret;
137
138         /* look up for chipid node */
139         np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gx-ao-secure");
140         if (!np)
141                 return -ENODEV;
142
143         /* check if interface is enabled */
144         if (!of_device_is_available(np)) {
145                 of_node_put(np);
146                 return -ENODEV;
147         }
148
149         /* check if chip-id is available */
150         if (!of_property_read_bool(np, "amlogic,has-chip-id")) {
151                 of_node_put(np);
152                 return -ENODEV;
153         }
154
155         /* node should be a syscon */
156         regmap = syscon_node_to_regmap(np);
157         of_node_put(np);
158         if (IS_ERR(regmap)) {
159                 pr_err("%s: failed to get regmap\n", __func__);
160                 return -ENODEV;
161         }
162
163         ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo);
164         if (ret < 0)
165                 return ret;
166
167         if (!socinfo) {
168                 pr_err("%s: invalid chipid value\n", __func__);
169                 return -EINVAL;
170         }
171
172         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
173         if (!soc_dev_attr)
174                 return -ENODEV;
175
176         soc_dev_attr->family = "Amlogic Meson";
177         soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x:%x - %x:%x",
178                                            socinfo_to_major(socinfo),
179                                            socinfo_to_minor(socinfo),
180                                            socinfo_to_pack(socinfo),
181                                            socinfo_to_misc(socinfo));
182         soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%s (%s)",
183                                          socinfo_to_soc_id(socinfo),
184                                          socinfo_to_package_id(socinfo));
185
186         soc_dev = soc_device_register(soc_dev_attr);
187         if (IS_ERR(soc_dev)) {
188                 kfree(soc_dev_attr->revision);
189                 kfree_const(soc_dev_attr->soc_id);
190                 kfree(soc_dev_attr);
191                 return PTR_ERR(soc_dev);
192         }
193         dev = soc_device_to_device(soc_dev);
194
195         dev_info(dev, "Amlogic Meson %s Revision %x:%x (%x:%x) Detected\n",
196                         soc_dev_attr->soc_id,
197                         socinfo_to_major(socinfo),
198                         socinfo_to_minor(socinfo),
199                         socinfo_to_pack(socinfo),
200                         socinfo_to_misc(socinfo));
201
202         return 0;
203 }
204 device_initcall(meson_gx_socinfo_init);