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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Freescale QorIQ Platforms GUTS Driver4 *5 * Copyright (C) 2016 Freescale Semiconductor, Inc.6 */7 8#include <linux/io.h>9#include <linux/slab.h>10#include <linux/module.h>11#include <linux/of_fdt.h>12#include <linux/sys_soc.h>13#include <linux/of_address.h>14#include <linux/platform_device.h>15#include <linux/fsl/guts.h>16 17struct fsl_soc_die_attr {18 char *die;19 u32 svr;20 u32 mask;21};22 23struct fsl_soc_data {24 const char *sfp_compat;25 u32 uid_offset;26};27 28/* SoC die attribute definition for QorIQ platform */29static const struct fsl_soc_die_attr fsl_soc_die[] = {30 /*31 * Power Architecture-based SoCs T Series32 */33 34 /* Die: T4240, SoC: T4240/T4160/T4080 */35 { .die = "T4240",36 .svr = 0x82400000,37 .mask = 0xfff00000,38 },39 /* Die: T1040, SoC: T1040/T1020/T1042/T1022 */40 { .die = "T1040",41 .svr = 0x85200000,42 .mask = 0xfff00000,43 },44 /* Die: T2080, SoC: T2080/T2081 */45 { .die = "T2080",46 .svr = 0x85300000,47 .mask = 0xfff00000,48 },49 /* Die: T1024, SoC: T1024/T1014/T1023/T1013 */50 { .die = "T1024",51 .svr = 0x85400000,52 .mask = 0xfff00000,53 },54 55 /*56 * ARM-based SoCs LS Series57 */58 59 /* Die: LS1043A, SoC: LS1043A/LS1023A */60 { .die = "LS1043A",61 .svr = 0x87920000,62 .mask = 0xffff0000,63 },64 /* Die: LS2080A, SoC: LS2080A/LS2040A/LS2085A */65 { .die = "LS2080A",66 .svr = 0x87010000,67 .mask = 0xff3f0000,68 },69 /* Die: LS1088A, SoC: LS1088A/LS1048A/LS1084A/LS1044A */70 { .die = "LS1088A",71 .svr = 0x87030000,72 .mask = 0xff3f0000,73 },74 /* Die: LS1012A, SoC: LS1012A */75 { .die = "LS1012A",76 .svr = 0x87040000,77 .mask = 0xffff0000,78 },79 /* Die: LS1046A, SoC: LS1046A/LS1026A */80 { .die = "LS1046A",81 .svr = 0x87070000,82 .mask = 0xffff0000,83 },84 /* Die: LS2088A, SoC: LS2088A/LS2048A/LS2084A/LS2044A */85 { .die = "LS2088A",86 .svr = 0x87090000,87 .mask = 0xff3f0000,88 },89 /* Die: LS1021A, SoC: LS1021A/LS1020A/LS1022A */90 { .die = "LS1021A",91 .svr = 0x87000000,92 .mask = 0xfff70000,93 },94 /* Die: LX2160A, SoC: LX2160A/LX2120A/LX2080A */95 { .die = "LX2160A",96 .svr = 0x87360000,97 .mask = 0xff3f0000,98 },99 /* Die: LS1028A, SoC: LS1028A */100 { .die = "LS1028A",101 .svr = 0x870b0000,102 .mask = 0xff3f0000,103 },104 { },105};106 107static const struct fsl_soc_die_attr *fsl_soc_die_match(108 u32 svr, const struct fsl_soc_die_attr *matches)109{110 while (matches->svr) {111 if (matches->svr == (svr & matches->mask))112 return matches;113 matches++;114 }115 return NULL;116}117 118static u64 fsl_guts_get_soc_uid(const char *compat, unsigned int offset)119{120 struct device_node *np;121 void __iomem *sfp_base;122 u64 uid;123 124 np = of_find_compatible_node(NULL, NULL, compat);125 if (!np)126 return 0;127 128 sfp_base = of_iomap(np, 0);129 if (!sfp_base) {130 of_node_put(np);131 return 0;132 }133 134 uid = ioread32(sfp_base + offset);135 uid <<= 32;136 uid |= ioread32(sfp_base + offset + 4);137 138 iounmap(sfp_base);139 of_node_put(np);140 141 return uid;142}143 144static const struct fsl_soc_data ls1028a_data = {145 .sfp_compat = "fsl,ls1028a-sfp",146 .uid_offset = 0x21c,147};148 149/*150 * Table for matching compatible strings, for device tree151 * guts node, for Freescale QorIQ SOCs.152 */153static const struct of_device_id fsl_guts_of_match[] = {154 { .compatible = "fsl,qoriq-device-config-1.0", },155 { .compatible = "fsl,qoriq-device-config-2.0", },156 { .compatible = "fsl,p1010-guts", },157 { .compatible = "fsl,p1020-guts", },158 { .compatible = "fsl,p1021-guts", },159 { .compatible = "fsl,p1022-guts", },160 { .compatible = "fsl,p1023-guts", },161 { .compatible = "fsl,p2020-guts", },162 { .compatible = "fsl,bsc9131-guts", },163 { .compatible = "fsl,bsc9132-guts", },164 { .compatible = "fsl,mpc8536-guts", },165 { .compatible = "fsl,mpc8544-guts", },166 { .compatible = "fsl,mpc8548-guts", },167 { .compatible = "fsl,mpc8568-guts", },168 { .compatible = "fsl,mpc8569-guts", },169 { .compatible = "fsl,mpc8572-guts", },170 { .compatible = "fsl,ls1021a-dcfg", },171 { .compatible = "fsl,ls1043a-dcfg", },172 { .compatible = "fsl,ls2080a-dcfg", },173 { .compatible = "fsl,ls1088a-dcfg", },174 { .compatible = "fsl,ls1012a-dcfg", },175 { .compatible = "fsl,ls1046a-dcfg", },176 { .compatible = "fsl,lx2160a-dcfg", },177 { .compatible = "fsl,ls1028a-dcfg", .data = &ls1028a_data},178 {}179};180 181static int __init fsl_guts_init(void)182{183 struct soc_device_attribute *soc_dev_attr;184 static struct soc_device *soc_dev;185 const struct fsl_soc_die_attr *soc_die;186 const struct fsl_soc_data *soc_data;187 const struct of_device_id *match;188 struct ccsr_guts __iomem *regs;189 const char *machine = NULL;190 struct device_node *np;191 bool little_endian;192 u64 soc_uid = 0;193 u32 svr;194 int ret;195 196 np = of_find_matching_node_and_match(NULL, fsl_guts_of_match, &match);197 if (!np)198 return 0;199 soc_data = match->data;200 201 regs = of_iomap(np, 0);202 if (!regs) {203 of_node_put(np);204 return -ENOMEM;205 }206 207 little_endian = of_property_read_bool(np, "little-endian");208 if (little_endian)209 svr = ioread32(®s->svr);210 else211 svr = ioread32be(®s->svr);212 iounmap(regs);213 of_node_put(np);214 215 /* Register soc device */216 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);217 if (!soc_dev_attr)218 return -ENOMEM;219 220 if (of_property_read_string(of_root, "model", &machine))221 of_property_read_string_index(of_root, "compatible", 0, &machine);222 if (machine) {223 soc_dev_attr->machine = kstrdup(machine, GFP_KERNEL);224 if (!soc_dev_attr->machine)225 goto err_nomem;226 }227 228 soc_die = fsl_soc_die_match(svr, fsl_soc_die);229 if (soc_die) {230 soc_dev_attr->family = kasprintf(GFP_KERNEL, "QorIQ %s",231 soc_die->die);232 } else {233 soc_dev_attr->family = kasprintf(GFP_KERNEL, "QorIQ");234 }235 if (!soc_dev_attr->family)236 goto err_nomem;237 238 soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "svr:0x%08x", svr);239 if (!soc_dev_attr->soc_id)240 goto err_nomem;241 242 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",243 (svr >> 4) & 0xf, svr & 0xf);244 if (!soc_dev_attr->revision)245 goto err_nomem;246 247 if (soc_data)248 soc_uid = fsl_guts_get_soc_uid(soc_data->sfp_compat,249 soc_data->uid_offset);250 if (soc_uid)251 soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX",252 soc_uid);253 254 soc_dev = soc_device_register(soc_dev_attr);255 if (IS_ERR(soc_dev)) {256 ret = PTR_ERR(soc_dev);257 goto err;258 }259 260 pr_info("Machine: %s\n", soc_dev_attr->machine);261 pr_info("SoC family: %s\n", soc_dev_attr->family);262 pr_info("SoC ID: %s, Revision: %s\n",263 soc_dev_attr->soc_id, soc_dev_attr->revision);264 265 return 0;266 267err_nomem:268 ret = -ENOMEM;269err:270 kfree(soc_dev_attr->machine);271 kfree(soc_dev_attr->family);272 kfree(soc_dev_attr->soc_id);273 kfree(soc_dev_attr->revision);274 kfree(soc_dev_attr->serial_number);275 kfree(soc_dev_attr);276 277 return ret;278}279core_initcall(fsl_guts_init);280