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 }; 50 51 static const struct meson_gx_package_id { 52 const char *name; 53 unsigned int major_id; 54 unsigned int pack_id; 55 unsigned int pack_mask; 56 } soc_packages[] = { 57 { "S905", 0x1f, 0, 0x20 }, /* pack_id != 0x20 */ 58 { "S905H", 0x1f, 0x3, 0xf }, /* pack_id & 0xf == 0x3 */ 59 { "S905M", 0x1f, 0x20, 0xf0 }, /* pack_id == 0x20 */ 60 { "S905D", 0x21, 0, 0xf0 }, 61 { "S905X", 0x21, 0x80, 0xf0 }, 62 { "S905W", 0x21, 0xa0, 0xf0 }, 63 { "S905L", 0x21, 0xc0, 0xf0 }, 64 { "S905M2", 0x21, 0xe0, 0xf0 }, 65 { "S805X", 0x21, 0x30, 0xf0 }, 66 { "S805Y", 0x21, 0xb0, 0xf0 }, 67 { "S912", 0x22, 0, 0x0 }, /* Only S912 is known for GXM */ 68 { "962X", 0x24, 0x10, 0xf0 }, 69 { "962E", 0x24, 0x20, 0xf0 }, 70 { "A113X", 0x25, 0x37, 0xff }, 71 { "A113X", 0x25, 0x43, 0xff }, 72 { "A113D", 0x25, 0x22, 0xff }, 73 { "S905L", 0x26, 0, 0x0 }, 74 { "S905D2", 0x28, 0x10, 0xf0 }, 75 { "S905Y2", 0x28, 0x30, 0xf0 }, 76 { "S905X2", 0x28, 0x40, 0xf0 }, 77 { "A311D", 0x29, 0x10, 0xf0 }, 78 { "S922X", 0x29, 0x40, 0xf0 }, 79 { "S905D3", 0x2b, 0x4, 0xf5 }, 80 { "S905X3", 0x2b, 0x5, 0xf5 }, 81 { "S905X3", 0x2b, 0x10, 0x3f }, 82 { "S905D3", 0x2b, 0x30, 0x3f }, 83 { "A113L", 0x2c, 0x0, 0xf8 }, 84 { "S805X2", 0x37, 0x2, 0xf }, 85 { "C308L", 0x3d, 0x1, 0xf }, 86 { "A311D2", 0x36, 0x1, 0xf }, 87 { "A113X2", 0x3c, 0x1, 0xf }, 88 { "A113L2", 0x40, 0x1, 0xf }, 89 }; 90 91 static inline unsigned int socinfo_to_major(u32 socinfo) 92 { 93 return FIELD_GET(SOCINFO_MAJOR, socinfo); 94 } 95 96 static inline unsigned int socinfo_to_minor(u32 socinfo) 97 { 98 return FIELD_GET(SOCINFO_MINOR, socinfo); 99 } 100 101 static inline unsigned int socinfo_to_pack(u32 socinfo) 102 { 103 return FIELD_GET(SOCINFO_PACK, socinfo); 104 } 105 106 static inline unsigned int socinfo_to_misc(u32 socinfo) 107 { 108 return FIELD_GET(SOCINFO_MISC, socinfo); 109 } 110 111 static const char *socinfo_to_package_id(u32 socinfo) 112 { 113 unsigned int pack = socinfo_to_pack(socinfo); 114 unsigned int major = socinfo_to_major(socinfo); 115 int i; 116 117 for (i = 0 ; i < ARRAY_SIZE(soc_packages) ; ++i) { 118 if (soc_packages[i].major_id == major && 119 soc_packages[i].pack_id == 120 (pack & soc_packages[i].pack_mask)) 121 return soc_packages[i].name; 122 } 123 124 return "Unknown"; 125 } 126 127 static const char *socinfo_to_soc_id(u32 socinfo) 128 { 129 unsigned int id = socinfo_to_major(socinfo); 130 int i; 131 132 for (i = 0 ; i < ARRAY_SIZE(soc_ids) ; ++i) { 133 if (soc_ids[i].id == id) 134 return soc_ids[i].name; 135 } 136 137 return "Unknown"; 138 } 139 140 static int __init meson_gx_socinfo_init(void) 141 { 142 struct soc_device_attribute *soc_dev_attr; 143 struct soc_device *soc_dev; 144 struct device_node *np; 145 struct regmap *regmap; 146 unsigned int socinfo; 147 struct device *dev; 148 int ret; 149 150 /* look up for chipid node */ 151 np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gx-ao-secure"); 152 if (!np) 153 return -ENODEV; 154 155 /* check if interface is enabled */ 156 if (!of_device_is_available(np)) { 157 of_node_put(np); 158 return -ENODEV; 159 } 160 161 /* check if chip-id is available */ 162 if (!of_property_read_bool(np, "amlogic,has-chip-id")) { 163 of_node_put(np); 164 return -ENODEV; 165 } 166 167 /* node should be a syscon */ 168 regmap = syscon_node_to_regmap(np); 169 of_node_put(np); 170 if (IS_ERR(regmap)) { 171 pr_err("%s: failed to get regmap\n", __func__); 172 return -ENODEV; 173 } 174 175 ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo); 176 if (ret < 0) 177 return ret; 178 179 if (!socinfo) { 180 pr_err("%s: invalid chipid value\n", __func__); 181 return -EINVAL; 182 } 183 184 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); 185 if (!soc_dev_attr) 186 return -ENODEV; 187 188 soc_dev_attr->family = "Amlogic Meson"; 189 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x:%x - %x:%x", 190 socinfo_to_major(socinfo), 191 socinfo_to_minor(socinfo), 192 socinfo_to_pack(socinfo), 193 socinfo_to_misc(socinfo)); 194 soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%s (%s)", 195 socinfo_to_soc_id(socinfo), 196 socinfo_to_package_id(socinfo)); 197 198 soc_dev = soc_device_register(soc_dev_attr); 199 if (IS_ERR(soc_dev)) { 200 kfree(soc_dev_attr->revision); 201 kfree_const(soc_dev_attr->soc_id); 202 kfree(soc_dev_attr); 203 return PTR_ERR(soc_dev); 204 } 205 dev = soc_device_to_device(soc_dev); 206 207 dev_info(dev, "Amlogic Meson %s Revision %x:%x (%x:%x) Detected\n", 208 soc_dev_attr->soc_id, 209 socinfo_to_major(socinfo), 210 socinfo_to_minor(socinfo), 211 socinfo_to_pack(socinfo), 212 socinfo_to_misc(socinfo)); 213 214 return 0; 215 } 216 device_initcall(meson_gx_socinfo_init); 217