Commit | Line | Data |
---|---|---|
f956a785 LW |
1 | /* |
2 | * Copyright (C) 2014 Linaro Ltd. | |
3 | * | |
4 | * Author: Linus Walleij <linus.walleij@linaro.org> | |
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 version 2, as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | */ | |
11 | #include <linux/init.h> | |
12 | #include <linux/io.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/sys_soc.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/mfd/syscon.h> | |
17 | #include <linux/regmap.h> | |
18 | #include <linux/of.h> | |
19 | ||
20 | #define INTEGRATOR_HDR_ID_OFFSET 0x00 | |
21 | ||
22 | static u32 integrator_coreid; | |
23 | ||
24 | static const struct of_device_id integrator_cm_match[] = { | |
25 | { .compatible = "arm,core-module-integrator", }, | |
c7478038 | 26 | { } |
f956a785 LW |
27 | }; |
28 | ||
29 | static const char *integrator_arch_str(u32 id) | |
30 | { | |
31 | switch ((id >> 16) & 0xff) { | |
32 | case 0x00: | |
33 | return "ASB little-endian"; | |
34 | case 0x01: | |
35 | return "AHB little-endian"; | |
36 | case 0x03: | |
37 | return "AHB-Lite system bus, bi-endian"; | |
38 | case 0x04: | |
39 | return "AHB"; | |
40 | case 0x08: | |
41 | return "AHB system bus, ASB processor bus"; | |
42 | default: | |
43 | return "Unknown"; | |
44 | } | |
45 | } | |
46 | ||
47 | static const char *integrator_fpga_str(u32 id) | |
48 | { | |
49 | switch ((id >> 12) & 0xf) { | |
50 | case 0x01: | |
51 | return "XC4062"; | |
52 | case 0x02: | |
53 | return "XC4085"; | |
54 | case 0x03: | |
55 | return "XVC600"; | |
56 | case 0x04: | |
57 | return "EPM7256AE (Altera PLD)"; | |
58 | default: | |
59 | return "Unknown"; | |
60 | } | |
61 | } | |
62 | ||
63 | static ssize_t integrator_get_manf(struct device *dev, | |
64 | struct device_attribute *attr, | |
65 | char *buf) | |
66 | { | |
67 | return sprintf(buf, "%02x\n", integrator_coreid >> 24); | |
68 | } | |
69 | ||
70 | static struct device_attribute integrator_manf_attr = | |
71 | __ATTR(manufacturer, S_IRUGO, integrator_get_manf, NULL); | |
72 | ||
73 | static ssize_t integrator_get_arch(struct device *dev, | |
74 | struct device_attribute *attr, | |
75 | char *buf) | |
76 | { | |
77 | return sprintf(buf, "%s\n", integrator_arch_str(integrator_coreid)); | |
78 | } | |
79 | ||
80 | static struct device_attribute integrator_arch_attr = | |
81 | __ATTR(arch, S_IRUGO, integrator_get_arch, NULL); | |
82 | ||
83 | static ssize_t integrator_get_fpga(struct device *dev, | |
84 | struct device_attribute *attr, | |
85 | char *buf) | |
86 | { | |
87 | return sprintf(buf, "%s\n", integrator_fpga_str(integrator_coreid)); | |
88 | } | |
89 | ||
90 | static struct device_attribute integrator_fpga_attr = | |
91 | __ATTR(fpga, S_IRUGO, integrator_get_fpga, NULL); | |
92 | ||
93 | static ssize_t integrator_get_build(struct device *dev, | |
94 | struct device_attribute *attr, | |
95 | char *buf) | |
96 | { | |
97 | return sprintf(buf, "%02x\n", (integrator_coreid >> 4) & 0xFF); | |
98 | } | |
99 | ||
100 | static struct device_attribute integrator_build_attr = | |
101 | __ATTR(build, S_IRUGO, integrator_get_build, NULL); | |
102 | ||
103 | static int __init integrator_soc_init(void) | |
104 | { | |
105 | static struct regmap *syscon_regmap; | |
106 | struct soc_device *soc_dev; | |
107 | struct soc_device_attribute *soc_dev_attr; | |
108 | struct device_node *np; | |
109 | struct device *dev; | |
110 | u32 val; | |
111 | int ret; | |
112 | ||
113 | np = of_find_matching_node(NULL, integrator_cm_match); | |
114 | if (!np) | |
115 | return -ENODEV; | |
116 | ||
117 | syscon_regmap = syscon_node_to_regmap(np); | |
118 | if (IS_ERR(syscon_regmap)) | |
119 | return PTR_ERR(syscon_regmap); | |
120 | ||
121 | ret = regmap_read(syscon_regmap, INTEGRATOR_HDR_ID_OFFSET, | |
122 | &val); | |
123 | if (ret) | |
124 | return -ENODEV; | |
125 | integrator_coreid = val; | |
126 | ||
127 | soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); | |
128 | if (!soc_dev_attr) | |
129 | return -ENOMEM; | |
130 | ||
131 | soc_dev_attr->soc_id = "Integrator"; | |
132 | soc_dev_attr->machine = "Integrator"; | |
133 | soc_dev_attr->family = "Versatile"; | |
134 | soc_dev = soc_device_register(soc_dev_attr); | |
135 | if (IS_ERR(soc_dev)) { | |
136 | kfree(soc_dev_attr); | |
137 | return -ENODEV; | |
138 | } | |
139 | dev = soc_device_to_device(soc_dev); | |
140 | ||
141 | device_create_file(dev, &integrator_manf_attr); | |
142 | device_create_file(dev, &integrator_arch_attr); | |
143 | device_create_file(dev, &integrator_fpga_attr); | |
144 | device_create_file(dev, &integrator_build_attr); | |
145 | ||
146 | dev_info(dev, "Detected ARM core module:\n"); | |
147 | dev_info(dev, " Manufacturer: %02x\n", (val >> 24)); | |
148 | dev_info(dev, " Architecture: %s\n", integrator_arch_str(val)); | |
149 | dev_info(dev, " FPGA: %s\n", integrator_fpga_str(val)); | |
150 | dev_info(dev, " Build: %02x\n", (val >> 4) & 0xFF); | |
151 | dev_info(dev, " Rev: %c\n", ('A' + (val & 0x03))); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | device_initcall(integrator_soc_init); |