217 lines · c
1/*2 * Copyright (c) 2017 BayLibre, SAS3 * 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 0xe020#define AO_SEC_SOCINFO_OFFSET AO_SEC_SD_CFG821 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 27static 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 51static 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 91static inline unsigned int socinfo_to_major(u32 socinfo)92{93 return FIELD_GET(SOCINFO_MAJOR, socinfo);94}95 96static inline unsigned int socinfo_to_minor(u32 socinfo)97{98 return FIELD_GET(SOCINFO_MINOR, socinfo);99}100 101static inline unsigned int socinfo_to_pack(u32 socinfo)102{103 return FIELD_GET(SOCINFO_PACK, socinfo);104}105 106static inline unsigned int socinfo_to_misc(u32 socinfo)107{108 return FIELD_GET(SOCINFO_MISC, socinfo);109}110 111static 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 127static 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 140static 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}216device_initcall(meson_gx_socinfo_init);217