linux/drivers/soc/fsl/guts.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Freescale QorIQ Platforms GUTS Driver
   4 *
   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 guts {
  18        struct ccsr_guts __iomem *regs;
  19        bool little_endian;
  20};
  21
  22struct fsl_soc_die_attr {
  23        char    *die;
  24        u32     svr;
  25        u32     mask;
  26};
  27
  28static struct guts *guts;
  29static struct soc_device_attribute soc_dev_attr;
  30static struct soc_device *soc_dev;
  31static struct device_node *root;
  32
  33
  34/* SoC die attribute definition for QorIQ platform */
  35static const struct fsl_soc_die_attr fsl_soc_die[] = {
  36        /*
  37         * Power Architecture-based SoCs T Series
  38         */
  39
  40        /* Die: T4240, SoC: T4240/T4160/T4080 */
  41        { .die          = "T4240",
  42          .svr          = 0x82400000,
  43          .mask         = 0xfff00000,
  44        },
  45        /* Die: T1040, SoC: T1040/T1020/T1042/T1022 */
  46        { .die          = "T1040",
  47          .svr          = 0x85200000,
  48          .mask         = 0xfff00000,
  49        },
  50        /* Die: T2080, SoC: T2080/T2081 */
  51        { .die          = "T2080",
  52          .svr          = 0x85300000,
  53          .mask         = 0xfff00000,
  54        },
  55        /* Die: T1024, SoC: T1024/T1014/T1023/T1013 */
  56        { .die          = "T1024",
  57          .svr          = 0x85400000,
  58          .mask         = 0xfff00000,
  59        },
  60
  61        /*
  62         * ARM-based SoCs LS Series
  63         */
  64
  65        /* Die: LS1043A, SoC: LS1043A/LS1023A */
  66        { .die          = "LS1043A",
  67          .svr          = 0x87920000,
  68          .mask         = 0xffff0000,
  69        },
  70        /* Die: LS2080A, SoC: LS2080A/LS2040A/LS2085A */
  71        { .die          = "LS2080A",
  72          .svr          = 0x87010000,
  73          .mask         = 0xff3f0000,
  74        },
  75        /* Die: LS1088A, SoC: LS1088A/LS1048A/LS1084A/LS1044A */
  76        { .die          = "LS1088A",
  77          .svr          = 0x87030000,
  78          .mask         = 0xff3f0000,
  79        },
  80        /* Die: LS1012A, SoC: LS1012A */
  81        { .die          = "LS1012A",
  82          .svr          = 0x87040000,
  83          .mask         = 0xffff0000,
  84        },
  85        /* Die: LS1046A, SoC: LS1046A/LS1026A */
  86        { .die          = "LS1046A",
  87          .svr          = 0x87070000,
  88          .mask         = 0xffff0000,
  89        },
  90        /* Die: LS2088A, SoC: LS2088A/LS2048A/LS2084A/LS2044A */
  91        { .die          = "LS2088A",
  92          .svr          = 0x87090000,
  93          .mask         = 0xff3f0000,
  94        },
  95        /* Die: LS1021A, SoC: LS1021A/LS1020A/LS1022A */
  96        { .die          = "LS1021A",
  97          .svr          = 0x87000000,
  98          .mask         = 0xfff70000,
  99        },
 100        /* Die: LX2160A, SoC: LX2160A/LX2120A/LX2080A */
 101        { .die          = "LX2160A",
 102          .svr          = 0x87360000,
 103          .mask         = 0xff3f0000,
 104        },
 105        /* Die: LS1028A, SoC: LS1028A */
 106        { .die          = "LS1028A",
 107          .svr          = 0x870b0000,
 108          .mask         = 0xff3f0000,
 109        },
 110        { },
 111};
 112
 113static const struct fsl_soc_die_attr *fsl_soc_die_match(
 114        u32 svr, const struct fsl_soc_die_attr *matches)
 115{
 116        while (matches->svr) {
 117                if (matches->svr == (svr & matches->mask))
 118                        return matches;
 119                matches++;
 120        };
 121        return NULL;
 122}
 123
 124static u32 fsl_guts_get_svr(void)
 125{
 126        u32 svr = 0;
 127
 128        if (!guts || !guts->regs)
 129                return svr;
 130
 131        if (guts->little_endian)
 132                svr = ioread32(&guts->regs->svr);
 133        else
 134                svr = ioread32be(&guts->regs->svr);
 135
 136        return svr;
 137}
 138
 139static int fsl_guts_probe(struct platform_device *pdev)
 140{
 141        struct device_node *np = pdev->dev.of_node;
 142        struct device *dev = &pdev->dev;
 143        struct resource *res;
 144        const struct fsl_soc_die_attr *soc_die;
 145        const char *machine;
 146        u32 svr;
 147
 148        /* Initialize guts */
 149        guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL);
 150        if (!guts)
 151                return -ENOMEM;
 152
 153        guts->little_endian = of_property_read_bool(np, "little-endian");
 154
 155        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 156        guts->regs = devm_ioremap_resource(dev, res);
 157        if (IS_ERR(guts->regs))
 158                return PTR_ERR(guts->regs);
 159
 160        /* Register soc device */
 161        root = of_find_node_by_path("/");
 162        if (of_property_read_string(root, "model", &machine))
 163                of_property_read_string_index(root, "compatible", 0, &machine);
 164        if (machine)
 165                soc_dev_attr.machine = machine;
 166
 167        svr = fsl_guts_get_svr();
 168        soc_die = fsl_soc_die_match(svr, fsl_soc_die);
 169        if (soc_die) {
 170                soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL,
 171                                                     "QorIQ %s", soc_die->die);
 172        } else {
 173                soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, "QorIQ");
 174        }
 175        if (!soc_dev_attr.family)
 176                return -ENOMEM;
 177        soc_dev_attr.soc_id = devm_kasprintf(dev, GFP_KERNEL,
 178                                             "svr:0x%08x", svr);
 179        if (!soc_dev_attr.soc_id)
 180                return -ENOMEM;
 181        soc_dev_attr.revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d",
 182                                               (svr >>  4) & 0xf, svr & 0xf);
 183        if (!soc_dev_attr.revision)
 184                return -ENOMEM;
 185
 186        soc_dev = soc_device_register(&soc_dev_attr);
 187        if (IS_ERR(soc_dev))
 188                return PTR_ERR(soc_dev);
 189
 190        pr_info("Machine: %s\n", soc_dev_attr.machine);
 191        pr_info("SoC family: %s\n", soc_dev_attr.family);
 192        pr_info("SoC ID: %s, Revision: %s\n",
 193                soc_dev_attr.soc_id, soc_dev_attr.revision);
 194        return 0;
 195}
 196
 197static int fsl_guts_remove(struct platform_device *dev)
 198{
 199        soc_device_unregister(soc_dev);
 200        of_node_put(root);
 201        return 0;
 202}
 203
 204/*
 205 * Table for matching compatible strings, for device tree
 206 * guts node, for Freescale QorIQ SOCs.
 207 */
 208static const struct of_device_id fsl_guts_of_match[] = {
 209        { .compatible = "fsl,qoriq-device-config-1.0", },
 210        { .compatible = "fsl,qoriq-device-config-2.0", },
 211        { .compatible = "fsl,p1010-guts", },
 212        { .compatible = "fsl,p1020-guts", },
 213        { .compatible = "fsl,p1021-guts", },
 214        { .compatible = "fsl,p1022-guts", },
 215        { .compatible = "fsl,p1023-guts", },
 216        { .compatible = "fsl,p2020-guts", },
 217        { .compatible = "fsl,bsc9131-guts", },
 218        { .compatible = "fsl,bsc9132-guts", },
 219        { .compatible = "fsl,mpc8536-guts", },
 220        { .compatible = "fsl,mpc8544-guts", },
 221        { .compatible = "fsl,mpc8548-guts", },
 222        { .compatible = "fsl,mpc8568-guts", },
 223        { .compatible = "fsl,mpc8569-guts", },
 224        { .compatible = "fsl,mpc8572-guts", },
 225        { .compatible = "fsl,ls1021a-dcfg", },
 226        { .compatible = "fsl,ls1043a-dcfg", },
 227        { .compatible = "fsl,ls2080a-dcfg", },
 228        { .compatible = "fsl,ls1088a-dcfg", },
 229        { .compatible = "fsl,ls1012a-dcfg", },
 230        { .compatible = "fsl,ls1046a-dcfg", },
 231        { .compatible = "fsl,lx2160a-dcfg", },
 232        { .compatible = "fsl,ls1028a-dcfg", },
 233        {}
 234};
 235MODULE_DEVICE_TABLE(of, fsl_guts_of_match);
 236
 237static struct platform_driver fsl_guts_driver = {
 238        .driver = {
 239                .name = "fsl-guts",
 240                .of_match_table = fsl_guts_of_match,
 241        },
 242        .probe = fsl_guts_probe,
 243        .remove = fsl_guts_remove,
 244};
 245
 246static int __init fsl_guts_init(void)
 247{
 248        return platform_driver_register(&fsl_guts_driver);
 249}
 250core_initcall(fsl_guts_init);
 251
 252static void __exit fsl_guts_exit(void)
 253{
 254        platform_driver_unregister(&fsl_guts_driver);
 255}
 256module_exit(fsl_guts_exit);
 257