/* * Copyright (c) 2017 BayLibre, SAS * Author: Neil Armstrong * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include #include #include #define AO_SEC_SD_CFG8 0xe0 #define AO_SEC_SOCINFO_OFFSET AO_SEC_SD_CFG8 #define SOCINFO_MAJOR GENMASK(31, 24) #define SOCINFO_PACK GENMASK(23, 16) #define SOCINFO_MINOR GENMASK(15, 8) #define SOCINFO_MISC GENMASK(7, 0) static const struct meson_gx_soc_id { const char *name; unsigned int id; } soc_ids[] = { { "GXBB", 0x1f }, { "GXTVBB", 0x20 }, { "GXL", 0x21 }, { "GXM", 0x22 }, { "TXL", 0x23 }, { "TXLX", 0x24 }, { "AXG", 0x25 }, { "GXLX", 0x26 }, { "TXHD", 0x27 }, { "G12A", 0x28 }, { "G12B", 0x29 }, }; static const struct meson_gx_package_id { const char *name; unsigned int major_id; unsigned int pack_id; unsigned int pack_mask; } soc_packages[] = { { "S905", 0x1f, 0, 0x20 }, /* pack_id != 0x20 */ { "S905H", 0x1f, 0x3, 0xf }, /* pack_id & 0xf == 0x3 */ { "S905M", 0x1f, 0x20, 0xf0 }, /* pack_id == 0x20 */ { "S905D", 0x21, 0, 0xf0 }, { "S905X", 0x21, 0x80, 0xf0 }, { "S905W", 0x21, 0xa0, 0xf0 }, { "S905L", 0x21, 0xc0, 0xf0 }, { "S905M2", 0x21, 0xe0, 0xf0 }, { "S805X", 0x21, 0x30, 0xf0 }, { "S805Y", 0x21, 0xb0, 0xf0 }, { "S912", 0x22, 0, 0x0 }, /* Only S912 is known for GXM */ { "962X", 0x24, 0x10, 0xf0 }, { "962E", 0x24, 0x20, 0xf0 }, { "A113X", 0x25, 0x37, 0xff }, { "A113D", 0x25, 0x22, 0xff }, { "S905D2", 0x28, 0x10, 0xf0 }, { "S905X2", 0x28, 0x40, 0xf0 }, { "S922X", 0x29, 0x40, 0xf0 }, }; static inline unsigned int socinfo_to_major(u32 socinfo) { return FIELD_GET(SOCINFO_MAJOR, socinfo); } static inline unsigned int socinfo_to_minor(u32 socinfo) { return FIELD_GET(SOCINFO_MINOR, socinfo); } static inline unsigned int socinfo_to_pack(u32 socinfo) { return FIELD_GET(SOCINFO_PACK, socinfo); } static inline unsigned int socinfo_to_misc(u32 socinfo) { return FIELD_GET(SOCINFO_MISC, socinfo); } static const char *socinfo_to_package_id(u32 socinfo) { unsigned int pack = socinfo_to_pack(socinfo); unsigned int major = socinfo_to_major(socinfo); int i; for (i = 0 ; i < ARRAY_SIZE(soc_packages) ; ++i) { if (soc_packages[i].major_id == major && soc_packages[i].pack_id == (pack & soc_packages[i].pack_mask)) return soc_packages[i].name; } return "Unknown"; } static const char *socinfo_to_soc_id(u32 socinfo) { unsigned int id = socinfo_to_major(socinfo); int i; for (i = 0 ; i < ARRAY_SIZE(soc_ids) ; ++i) { if (soc_ids[i].id == id) return soc_ids[i].name; } return "Unknown"; } static int __init meson_gx_socinfo_init(void) { struct soc_device_attribute *soc_dev_attr; struct soc_device *soc_dev; struct device_node *np; struct regmap *regmap; unsigned int socinfo; struct device *dev; int ret; /* look up for chipid node */ np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gx-ao-secure"); if (!np) return -ENODEV; /* check if interface is enabled */ if (!of_device_is_available(np)) return -ENODEV; /* check if chip-id is available */ if (!of_property_read_bool(np, "amlogic,has-chip-id")) return -ENODEV; /* node should be a syscon */ regmap = syscon_node_to_regmap(np); of_node_put(np); if (IS_ERR(regmap)) { pr_err("%s: failed to get regmap\n", __func__); return -ENODEV; } ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo); if (ret < 0) return ret; if (!socinfo) { pr_err("%s: invalid chipid value\n", __func__); return -EINVAL; } soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); if (!soc_dev_attr) return -ENODEV; soc_dev_attr->family = "Amlogic Meson"; np = of_find_node_by_path("/"); of_property_read_string(np, "model", &soc_dev_attr->machine); of_node_put(np); soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x:%x - %x:%x", socinfo_to_major(socinfo), socinfo_to_minor(socinfo), socinfo_to_pack(socinfo), socinfo_to_misc(socinfo)); soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%s (%s)", socinfo_to_soc_id(socinfo), socinfo_to_package_id(socinfo)); soc_dev = soc_device_register(soc_dev_attr); if (IS_ERR(soc_dev)) { kfree(soc_dev_attr->revision); kfree_const(soc_dev_attr->soc_id); kfree(soc_dev_attr); return PTR_ERR(soc_dev); } dev = soc_device_to_device(soc_dev); dev_info(dev, "Amlogic Meson %s Revision %x:%x (%x:%x) Detected\n", soc_dev_attr->soc_id, socinfo_to_major(socinfo), socinfo_to_minor(socinfo), socinfo_to_pack(socinfo), socinfo_to_misc(socinfo)); return 0; } device_initcall(meson_gx_socinfo_init);