| /* |
| * Copyright (c) 2017 BayLibre, SAS |
| * Author: Neil Armstrong <narmstrong@baylibre.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/of_platform.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| #include <linux/sys_soc.h> |
| #include <linux/bitfield.h> |
| #include <linux/regmap.h> |
| #include <linux/mfd/syscon.h> |
| |
| #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)) { |
| of_node_put(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); |