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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2023 MediaTek Inc. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/pm_runtime.h> #include <linux/nvmem-consumer.h> #include <linux/device.h> #include <linux/device/bus.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <linux/string.h> #include <linux/sys_soc.h> #include <linux/slab.h> #include <linux/platform_device.h> #define MTK_SOCINFO_ENTRY(_soc_name, _segment_name, _marketing_name, _cell_data1, _cell_data2) {\ .soc_name = _soc_name, \ .segment_name = _segment_name, \ .marketing_name = _marketing_name, \ .cell_data = {_cell_data1, _cell_data2} \ } #define CELL_NOT_USED (0xFFFFFFFF) #define MAX_CELLS (2) struct mtk_socinfo { struct device *dev; struct name_data *name_data; struct socinfo_data *socinfo_data; struct soc_device *soc_dev; }; struct socinfo_data { char *soc_name; char *segment_name; char *marketing_name; u32 cell_data[MAX_CELLS]; }; static const char *cell_names[MAX_CELLS] = {"socinfo-data1", "socinfo-data2"}; static struct socinfo_data socinfo_data_table[] = { MTK_SOCINFO_ENTRY("MT8173", "MT8173V/AC", "MT8173", 0x6CA20004, 0x10000000), MTK_SOCINFO_ENTRY("MT8183", "MT8183V/AZA", "Kompanio 500", 0x00010043, 0x00000840), MTK_SOCINFO_ENTRY("MT8183", "MT8183V/AZA", "Kompanio 500", 0x00010043, 0x00000940), MTK_SOCINFO_ENTRY("MT8186", "MT8186GV/AZA", "Kompanio 520", 0x81861001, CELL_NOT_USED), MTK_SOCINFO_ENTRY("MT8186T", "MT8186TV/AZA", "Kompanio 528", 0x81862001, CELL_NOT_USED), MTK_SOCINFO_ENTRY("MT8188", "MT8188GV/AZA", "Kompanio 830", 0x81880000, 0x00000010), MTK_SOCINFO_ENTRY("MT8188", "MT8188GV/HZA", "Kompanio 830", 0x81880000, 0x00000011), MTK_SOCINFO_ENTRY("MT8192", "MT8192V/AZA", "Kompanio 820", 0x00001100, 0x00040080), MTK_SOCINFO_ENTRY("MT8192T", "MT8192V/ATZA", "Kompanio 828", 0x00000100, 0x000400C0), MTK_SOCINFO_ENTRY("MT8195", "MT8195GV/EZA", "Kompanio 1200", 0x81950300, CELL_NOT_USED), MTK_SOCINFO_ENTRY("MT8195", "MT8195GV/EHZA", "Kompanio 1200", 0x81950304, CELL_NOT_USED), MTK_SOCINFO_ENTRY("MT8195", "MT8195TV/EZA", "Kompanio 1380", 0x81950400, CELL_NOT_USED), MTK_SOCINFO_ENTRY("MT8195", "MT8195TV/EHZA", "Kompanio 1380", 0x81950404, CELL_NOT_USED), }; static int mtk_socinfo_create_socinfo_node(struct mtk_socinfo *mtk_socinfop) { struct soc_device_attribute *attrs; static char machine[30] = {0}; static const char *soc_manufacturer = "MediaTek"; attrs = devm_kzalloc(mtk_socinfop->dev, sizeof(*attrs), GFP_KERNEL); if (!attrs) return -ENOMEM; snprintf(machine, sizeof(machine), "%s (%s)", mtk_socinfop->socinfo_data->marketing_name, mtk_socinfop->socinfo_data->soc_name); attrs->family = soc_manufacturer; attrs->machine = machine; mtk_socinfop->soc_dev = soc_device_register(attrs); if (IS_ERR(mtk_socinfop->soc_dev)) return PTR_ERR(mtk_socinfop->soc_dev); dev_info(mtk_socinfop->dev, "%s %s SoC detected.\n", soc_manufacturer, attrs->machine); return 0; } static u32 mtk_socinfo_read_cell(struct device *dev, const char *name) { struct nvmem_device *nvmemp; struct device_node *np, *nvmem_node = dev->parent->of_node; u32 offset; u32 cell_val = CELL_NOT_USED; /* should never fail since the nvmem driver registers this child */ nvmemp = nvmem_device_find(nvmem_node, device_match_of_node); if (IS_ERR(nvmemp)) goto out; np = of_get_child_by_name(nvmem_node, name); if (!np) goto put_device; if (of_property_read_u32_index(np, "reg", 0, &offset)) goto put_node; nvmem_device_read(nvmemp, offset, sizeof(cell_val), &cell_val); put_node: of_node_put(np); put_device: nvmem_device_put(nvmemp); out: return cell_val; } static int mtk_socinfo_get_socinfo_data(struct mtk_socinfo *mtk_socinfop) { unsigned int i, j; unsigned int num_cell_data = 0; u32 cell_data[MAX_CELLS] = {0}; bool match_socinfo; int match_socinfo_index = -1; for (i = 0; i < MAX_CELLS; i++) { cell_data[i] = mtk_socinfo_read_cell(mtk_socinfop->dev, cell_names[i]); if (cell_data[i] != CELL_NOT_USED) num_cell_data++; else break; } if (!num_cell_data) return -ENOENT; for (i = 0; i < ARRAY_SIZE(socinfo_data_table); i++) { match_socinfo = true; for (j = 0; j < num_cell_data; j++) { if (cell_data[j] != socinfo_data_table[i].cell_data[j]) { match_socinfo = false; break; } } if (match_socinfo) { mtk_socinfop->socinfo_data = &(socinfo_data_table[i]); match_socinfo_index = i; break; } } return match_socinfo_index >= 0 ? match_socinfo_index : -ENOENT; } static int mtk_socinfo_probe(struct platform_device *pdev) { struct mtk_socinfo *mtk_socinfop; int ret; mtk_socinfop = devm_kzalloc(&pdev->dev, sizeof(*mtk_socinfop), GFP_KERNEL); if (!mtk_socinfop) return -ENOMEM; mtk_socinfop->dev = &pdev->dev; ret = mtk_socinfo_get_socinfo_data(mtk_socinfop); if (ret < 0) return dev_err_probe(mtk_socinfop->dev, ret, "Failed to get socinfo data\n"); ret = mtk_socinfo_create_socinfo_node(mtk_socinfop); if (ret) return dev_err_probe(mtk_socinfop->dev, ret, "Cannot create node\n"); platform_set_drvdata(pdev, mtk_socinfop); return 0; } static void mtk_socinfo_remove(struct platform_device *pdev) { struct mtk_socinfo *mtk_socinfop = platform_get_drvdata(pdev); soc_device_unregister(mtk_socinfop->soc_dev); } static struct platform_driver mtk_socinfo = { .probe = mtk_socinfo_probe, .remove_new = mtk_socinfo_remove, .driver = { .name = "mtk-socinfo", }, }; module_platform_driver(mtk_socinfo); MODULE_AUTHOR("William-TW LIN <william-tw.lin@mediatek.com>"); MODULE_DESCRIPTION("MediaTek socinfo driver"); MODULE_LICENSE("GPL"); |