Martin Blumenstingl | 5e68c0f | 2017-09-23 16:14:02 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #include <linux/io.h> |
| 8 | #include <linux/of.h> |
| 9 | #include <linux/of_address.h> |
| 10 | #include <linux/of_platform.h> |
| 11 | #include <linux/platform_device.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/sys_soc.h> |
| 14 | #include <linux/bitfield.h> |
| 15 | #include <linux/regmap.h> |
| 16 | #include <linux/mfd/syscon.h> |
| 17 | |
| 18 | #define MESON_SOCINFO_MAJOR_VER_MESON6 0x16 |
| 19 | #define MESON_SOCINFO_MAJOR_VER_MESON8 0x19 |
| 20 | #define MESON_SOCINFO_MAJOR_VER_MESON8B 0x1b |
| 21 | |
| 22 | #define MESON_MX_ASSIST_HW_REV 0x14c |
| 23 | |
| 24 | #define MESON_MX_ANALOG_TOP_METAL_REVISION 0x0 |
| 25 | |
| 26 | #define MESON_MX_BOOTROM_MISC_VER 0x4 |
| 27 | |
| 28 | static const char *meson_mx_socinfo_revision(unsigned int major_ver, |
| 29 | unsigned int misc_ver, |
| 30 | unsigned int metal_rev) |
| 31 | { |
| 32 | unsigned int minor_ver; |
| 33 | |
| 34 | switch (major_ver) { |
| 35 | case MESON_SOCINFO_MAJOR_VER_MESON6: |
| 36 | minor_ver = 0xa; |
| 37 | break; |
| 38 | |
| 39 | case MESON_SOCINFO_MAJOR_VER_MESON8: |
| 40 | if (metal_rev == 0x11111112) |
| 41 | major_ver = 0x1d; |
| 42 | |
| 43 | if (metal_rev == 0x11111111 || metal_rev == 0x11111112) |
| 44 | minor_ver = 0xa; |
| 45 | else if (metal_rev == 0x11111113) |
| 46 | minor_ver = 0xb; |
| 47 | else if (metal_rev == 0x11111133) |
| 48 | minor_ver = 0xc; |
| 49 | else |
| 50 | minor_ver = 0xd; |
| 51 | |
| 52 | break; |
| 53 | |
| 54 | case MESON_SOCINFO_MAJOR_VER_MESON8B: |
| 55 | if (metal_rev == 0x11111111) |
| 56 | minor_ver = 0xa; |
| 57 | else |
| 58 | minor_ver = 0xb; |
| 59 | |
| 60 | break; |
| 61 | |
| 62 | default: |
| 63 | minor_ver = 0x0; |
| 64 | break; |
| 65 | } |
| 66 | |
| 67 | return kasprintf(GFP_KERNEL, "Rev%X (%x - 0:%X)", minor_ver, major_ver, |
| 68 | misc_ver); |
| 69 | } |
| 70 | |
| 71 | static const char *meson_mx_socinfo_soc_id(unsigned int major_ver, |
| 72 | unsigned int metal_rev) |
| 73 | { |
| 74 | const char *soc_id; |
| 75 | |
| 76 | switch (major_ver) { |
| 77 | case MESON_SOCINFO_MAJOR_VER_MESON6: |
| 78 | soc_id = "Meson6 (AML8726-MX)"; |
| 79 | break; |
| 80 | |
| 81 | case MESON_SOCINFO_MAJOR_VER_MESON8: |
| 82 | if (metal_rev == 0x11111112) |
| 83 | soc_id = "Meson8m2 (S812)"; |
| 84 | else |
| 85 | soc_id = "Meson8 (S802)"; |
| 86 | |
| 87 | break; |
| 88 | |
| 89 | case MESON_SOCINFO_MAJOR_VER_MESON8B: |
| 90 | soc_id = "Meson8b (S805)"; |
| 91 | break; |
| 92 | |
| 93 | default: |
| 94 | soc_id = "Unknown"; |
| 95 | break; |
| 96 | } |
| 97 | |
| 98 | return kstrdup_const(soc_id, GFP_KERNEL); |
| 99 | } |
| 100 | |
| 101 | static const struct of_device_id meson_mx_socinfo_analog_top_ids[] = { |
| 102 | { .compatible = "amlogic,meson8-analog-top", }, |
| 103 | { .compatible = "amlogic,meson8b-analog-top", }, |
| 104 | { /* sentinel */ } |
| 105 | }; |
| 106 | |
weiyongjun (A) | 82a759c | 2018-01-10 14:19:40 +0000 | [diff] [blame] | 107 | static int __init meson_mx_socinfo_init(void) |
Martin Blumenstingl | 5e68c0f | 2017-09-23 16:14:02 +0200 | [diff] [blame] | 108 | { |
| 109 | struct soc_device_attribute *soc_dev_attr; |
| 110 | struct soc_device *soc_dev; |
| 111 | struct device_node *np; |
| 112 | struct regmap *assist_regmap, *bootrom_regmap, *analog_top_regmap; |
| 113 | unsigned int major_ver, misc_ver, metal_rev = 0; |
| 114 | int ret; |
| 115 | |
| 116 | assist_regmap = |
| 117 | syscon_regmap_lookup_by_compatible("amlogic,meson-mx-assist"); |
| 118 | if (IS_ERR(assist_regmap)) |
| 119 | return PTR_ERR(assist_regmap); |
| 120 | |
| 121 | bootrom_regmap = |
| 122 | syscon_regmap_lookup_by_compatible("amlogic,meson-mx-bootrom"); |
| 123 | if (IS_ERR(bootrom_regmap)) |
| 124 | return PTR_ERR(bootrom_regmap); |
| 125 | |
| 126 | np = of_find_matching_node(NULL, meson_mx_socinfo_analog_top_ids); |
| 127 | if (np) { |
| 128 | analog_top_regmap = syscon_node_to_regmap(np); |
| 129 | if (IS_ERR(analog_top_regmap)) |
| 130 | return PTR_ERR(analog_top_regmap); |
| 131 | |
| 132 | ret = regmap_read(analog_top_regmap, |
| 133 | MESON_MX_ANALOG_TOP_METAL_REVISION, |
| 134 | &metal_rev); |
| 135 | if (ret) |
| 136 | return ret; |
| 137 | } |
| 138 | |
| 139 | ret = regmap_read(assist_regmap, MESON_MX_ASSIST_HW_REV, &major_ver); |
| 140 | if (ret < 0) |
| 141 | return ret; |
| 142 | |
| 143 | ret = regmap_read(bootrom_regmap, MESON_MX_BOOTROM_MISC_VER, |
| 144 | &misc_ver); |
| 145 | if (ret < 0) |
| 146 | return ret; |
| 147 | |
| 148 | soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); |
| 149 | if (!soc_dev_attr) |
| 150 | return -ENODEV; |
| 151 | |
| 152 | soc_dev_attr->family = "Amlogic Meson"; |
| 153 | |
| 154 | np = of_find_node_by_path("/"); |
| 155 | of_property_read_string(np, "model", &soc_dev_attr->machine); |
| 156 | of_node_put(np); |
| 157 | |
| 158 | soc_dev_attr->revision = meson_mx_socinfo_revision(major_ver, misc_ver, |
| 159 | metal_rev); |
| 160 | soc_dev_attr->soc_id = meson_mx_socinfo_soc_id(major_ver, metal_rev); |
| 161 | |
| 162 | soc_dev = soc_device_register(soc_dev_attr); |
| 163 | if (IS_ERR(soc_dev)) { |
| 164 | kfree_const(soc_dev_attr->revision); |
| 165 | kfree_const(soc_dev_attr->soc_id); |
| 166 | kfree(soc_dev_attr); |
| 167 | return PTR_ERR(soc_dev); |
| 168 | } |
| 169 | |
| 170 | dev_info(soc_device_to_device(soc_dev), "Amlogic %s %s detected\n", |
| 171 | soc_dev_attr->soc_id, soc_dev_attr->revision); |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | device_initcall(meson_mx_socinfo_init); |