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175 lines
4.0 KiB
175 lines
4.0 KiB
/* |
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* Copyright (c) 2017 Martin Blumenstingl <[email protected]> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <linux/io.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/of_platform.h> |
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#include <linux/platform_device.h> |
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#include <linux/slab.h> |
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#include <linux/sys_soc.h> |
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#include <linux/bitfield.h> |
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#include <linux/regmap.h> |
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#include <linux/mfd/syscon.h> |
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#define MESON_SOCINFO_MAJOR_VER_MESON6 0x16 |
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#define MESON_SOCINFO_MAJOR_VER_MESON8 0x19 |
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#define MESON_SOCINFO_MAJOR_VER_MESON8B 0x1b |
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#define MESON_MX_ASSIST_HW_REV 0x14c |
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#define MESON_MX_ANALOG_TOP_METAL_REVISION 0x0 |
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#define MESON_MX_BOOTROM_MISC_VER 0x4 |
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static const char *meson_mx_socinfo_revision(unsigned int major_ver, |
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unsigned int misc_ver, |
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unsigned int metal_rev) |
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{ |
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unsigned int minor_ver; |
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switch (major_ver) { |
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case MESON_SOCINFO_MAJOR_VER_MESON6: |
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minor_ver = 0xa; |
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break; |
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case MESON_SOCINFO_MAJOR_VER_MESON8: |
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if (metal_rev == 0x11111112) |
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major_ver = 0x1d; |
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if (metal_rev == 0x11111111 || metal_rev == 0x11111112) |
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minor_ver = 0xa; |
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else if (metal_rev == 0x11111113) |
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minor_ver = 0xb; |
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else if (metal_rev == 0x11111133) |
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minor_ver = 0xc; |
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else |
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minor_ver = 0xd; |
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break; |
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case MESON_SOCINFO_MAJOR_VER_MESON8B: |
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if (metal_rev == 0x11111111) |
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minor_ver = 0xa; |
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else |
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minor_ver = 0xb; |
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break; |
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default: |
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minor_ver = 0x0; |
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break; |
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} |
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return kasprintf(GFP_KERNEL, "Rev%X (%x - 0:%X)", minor_ver, major_ver, |
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misc_ver); |
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} |
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static const char *meson_mx_socinfo_soc_id(unsigned int major_ver, |
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unsigned int metal_rev) |
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{ |
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const char *soc_id; |
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switch (major_ver) { |
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case MESON_SOCINFO_MAJOR_VER_MESON6: |
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soc_id = "Meson6 (AML8726-MX)"; |
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break; |
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case MESON_SOCINFO_MAJOR_VER_MESON8: |
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if (metal_rev == 0x11111112) |
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soc_id = "Meson8m2 (S812)"; |
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else |
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soc_id = "Meson8 (S802)"; |
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break; |
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case MESON_SOCINFO_MAJOR_VER_MESON8B: |
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soc_id = "Meson8b (S805)"; |
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break; |
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default: |
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soc_id = "Unknown"; |
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break; |
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} |
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return kstrdup_const(soc_id, GFP_KERNEL); |
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} |
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static const struct of_device_id meson_mx_socinfo_analog_top_ids[] = { |
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{ .compatible = "amlogic,meson8-analog-top", }, |
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{ .compatible = "amlogic,meson8b-analog-top", }, |
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{ /* sentinel */ } |
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}; |
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static int __init meson_mx_socinfo_init(void) |
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{ |
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struct soc_device_attribute *soc_dev_attr; |
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struct soc_device *soc_dev; |
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struct device_node *np; |
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struct regmap *assist_regmap, *bootrom_regmap, *analog_top_regmap; |
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unsigned int major_ver, misc_ver, metal_rev = 0; |
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int ret; |
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assist_regmap = |
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syscon_regmap_lookup_by_compatible("amlogic,meson-mx-assist"); |
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if (IS_ERR(assist_regmap)) |
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return PTR_ERR(assist_regmap); |
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bootrom_regmap = |
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syscon_regmap_lookup_by_compatible("amlogic,meson-mx-bootrom"); |
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if (IS_ERR(bootrom_regmap)) |
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return PTR_ERR(bootrom_regmap); |
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np = of_find_matching_node(NULL, meson_mx_socinfo_analog_top_ids); |
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if (np) { |
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analog_top_regmap = syscon_node_to_regmap(np); |
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if (IS_ERR(analog_top_regmap)) |
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return PTR_ERR(analog_top_regmap); |
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ret = regmap_read(analog_top_regmap, |
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MESON_MX_ANALOG_TOP_METAL_REVISION, |
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&metal_rev); |
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if (ret) |
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return ret; |
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} |
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ret = regmap_read(assist_regmap, MESON_MX_ASSIST_HW_REV, &major_ver); |
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if (ret < 0) |
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return ret; |
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ret = regmap_read(bootrom_regmap, MESON_MX_BOOTROM_MISC_VER, |
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&misc_ver); |
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if (ret < 0) |
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return ret; |
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); |
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if (!soc_dev_attr) |
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return -ENODEV; |
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soc_dev_attr->family = "Amlogic Meson"; |
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np = of_find_node_by_path("/"); |
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of_property_read_string(np, "model", &soc_dev_attr->machine); |
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of_node_put(np); |
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soc_dev_attr->revision = meson_mx_socinfo_revision(major_ver, misc_ver, |
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metal_rev); |
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soc_dev_attr->soc_id = meson_mx_socinfo_soc_id(major_ver, metal_rev); |
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soc_dev = soc_device_register(soc_dev_attr); |
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if (IS_ERR(soc_dev)) { |
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kfree_const(soc_dev_attr->revision); |
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kfree_const(soc_dev_attr->soc_id); |
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kfree(soc_dev_attr); |
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return PTR_ERR(soc_dev); |
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} |
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dev_info(soc_device_to_device(soc_dev), "Amlogic %s %s detected\n", |
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soc_dev_attr->soc_id, soc_dev_attr->revision); |
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return 0; |
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} |
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device_initcall(meson_mx_socinfo_init);
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