drivers/soc/fsl/guts.c

   1 /*
   2  * Freescale QorIQ Platforms GUTS Driver
   3  *
   4  * Copyright (C) 2016 Freescale Semiconductor, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/io.h>
  13 #include <linux/slab.h>
  14 #include <linux/module.h>
  15 #include <linux/of_fdt.h>
  16 #include <linux/sys_soc.h>
  17 #include <linux/of_address.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/fsl/guts.h>
  20
  21 struct guts {
  22         struct ccsr_guts __iomem *regs;
  23         bool little_endian;
  24 };
  25
  26 struct fsl_soc_die_attr {
  27         char    *die;
  28         u32     svr;
  29         u32     mask;
  30 };
  31
  32 static struct guts *guts;
  33 static struct soc_device_attribute soc_dev_attr;
  34 static struct soc_device *soc_dev;
  35
  36
  37 /* SoC die attribute definition for QorIQ platform */
  38 static const struct fsl_soc_die_attr fsl_soc_die[] = {
  39         /*
  40          * Power Architecture-based SoCs T Series
  41          */
  42
  43         /* Die: T4240, SoC: T4240/T4160/T4080 */
  44         { .die          = "T4240",
  45           .svr          = 0x82400000,
  46           .mask         = 0xfff00000,
  47         },
  48         /* Die: T1040, SoC: T1040/T1020/T1042/T1022 */
  49         { .die          = "T1040",
  50           .svr          = 0x85200000,
  51           .mask         = 0xfff00000,
  52         },
  53         /* Die: T2080, SoC: T2080/T2081 */
  54         { .die          = "T2080",
  55           .svr          = 0x85300000,
  56           .mask         = 0xfff00000,
  57         },
  58         /* Die: T1024, SoC: T1024/T1014/T1023/T1013 */
  59         { .die          = "T1024",
  60           .svr          = 0x85400000,
  61           .mask         = 0xfff00000,
  62         },
  63
  64         /*
  65          * ARM-based SoCs LS Series
  66          */
  67
  68         /* Die: LS1043A, SoC: LS1043A/LS1023A */
  69         { .die          = "LS1043A",
  70           .svr          = 0x87920000,
  71           .mask         = 0xffff0000,
  72         },
  73         /* Die: LS2080A, SoC: LS2080A/LS2040A/LS2085A */
  74         { .die          = "LS2080A",
  75           .svr          = 0x87010000,
  76           .mask         = 0xff3f0000,
  77         },
  78         /* Die: LS1088A, SoC: LS1088A/LS1048A/LS1084A/LS1044A */
  79         { .die          = "LS1088A",
  80           .svr          = 0x87030000,
  81           .mask         = 0xff3f0000,
  82         },
  83         /* Die: LS1012A, SoC: LS1012A */
  84         { .die          = "LS1012A",
  85           .svr          = 0x87040000,
  86           .mask         = 0xffff0000,
  87         },
  88         /* Die: LS1046A, SoC: LS1046A/LS1026A */
  89         { .die          = "LS1046A",
  90           .svr          = 0x87070000,
  91           .mask         = 0xffff0000,
  92         },
  93         /* Die: LS2088A, SoC: LS2088A/LS2048A/LS2084A/LS2044A */
  94         { .die          = "LS2088A",
  95           .svr          = 0x87090000,
  96           .mask         = 0xff3f0000,
  97         },
  98         /* Die: LS1021A, SoC: LS1021A/LS1020A/LS1022A */
  99         { .die          = "LS1021A",
 100           .svr          = 0x87000000,
 101           .mask         = 0xfff70000,
 102         },
 103         { },
 104 };
 105
 106 static const struct fsl_soc_die_attr *fsl_soc_die_match(
 107         u32 svr, const struct fsl_soc_die_attr *matches)
 108 {
 109         while (matches->svr) {
 110                 if (matches->svr == (svr & matches->mask))
 111                         return matches;
 112                 matches++;
 113         };
 114         return NULL;
 115 }
 116
 117 u32 fsl_guts_get_svr(void)
 118 {
 119         u32 svr = 0;
 120
 121         if (!guts || !guts->regs)
 122                 return svr;
 123
 124         if (guts->little_endian)
 125                 svr = ioread32(&guts->regs->svr);
 126         else
 127                 svr = ioread32be(&guts->regs->svr);
 128
 129         return svr;
 130 }
 131 EXPORT_SYMBOL(fsl_guts_get_svr);
 132
 133 static int fsl_guts_probe(struct platform_device *pdev)
 134 {
 135         struct device_node *root, *np = pdev->dev.of_node;
 136         struct device *dev = &pdev->dev;
 137         struct resource *res;
 138         const struct fsl_soc_die_attr *soc_die;
 139         const char *machine;
 140         u32 svr;
 141
 142         /* Initialize guts */
 143         guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL);
 144         if (!guts)
 145                 return -ENOMEM;
 146
 147         guts->little_endian = of_property_read_bool(np, "little-endian");
 148
 149         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 150         guts->regs = devm_ioremap_resource(dev, res);
 151         if (IS_ERR(guts->regs))
 152                 return PTR_ERR(guts->regs);
 153
 154         /* Register soc device */
 155         root = of_find_node_by_path("/");
 156         if (of_property_read_string(root, "model", &machine))
 157                 of_property_read_string_index(root, "compatible", 0, &machine);
 158         of_node_put(root);
 159         if (machine)
 160                 soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);
 161
 162         svr = fsl_guts_get_svr();
 163         soc_die = fsl_soc_die_match(svr, fsl_soc_die);
 164         if (soc_die) {
 165                 soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL,
 166                                                      "QorIQ %s", soc_die->die);
 167         } else {
 168                 soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, "QorIQ");
 169         }
 170         if (!soc_dev_attr.family)
 171                 return -ENOMEM;
 172         soc_dev_attr.soc_id = devm_kasprintf(dev, GFP_KERNEL,
 173                                              "svr:0x%08x", svr);
 174         if (!soc_dev_attr.soc_id)
 175                 return -ENOMEM;
 176         soc_dev_attr.revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d",
 177                                                (svr >>  4) & 0xf, svr & 0xf);
 178         if (!soc_dev_attr.revision)
 179                 return -ENOMEM;
 180
 181         soc_dev = soc_device_register(&soc_dev_attr);
 182         if (IS_ERR(soc_dev))
 183                 return PTR_ERR(soc_dev);
 184
 185         pr_info("Machine: %s\n", soc_dev_attr.machine);
 186         pr_info("SoC family: %s\n", soc_dev_attr.family);
 187         pr_info("SoC ID: %s, Revision: %s\n",
 188                 soc_dev_attr.soc_id, soc_dev_attr.revision);
 189         return 0;
 190 }
 191
 192 static int fsl_guts_remove(struct platform_device *dev)
 193 {
 194         soc_device_unregister(soc_dev);
 195         return 0;
 196 }
 197
 198 /*
 199  * Table for matching compatible strings, for device tree
 200  * guts node, for Freescale QorIQ SOCs.
 201  */
 202 static const struct of_device_id fsl_guts_of_match[] = {
 203         { .compatible = "fsl,qoriq-device-config-1.0", },
 204         { .compatible = "fsl,qoriq-device-config-2.0", },
 205         { .compatible = "fsl,p1010-guts", },
 206         { .compatible = "fsl,p1020-guts", },
 207         { .compatible = "fsl,p1021-guts", },
 208         { .compatible = "fsl,p1022-guts", },
 209         { .compatible = "fsl,p1023-guts", },
 210         { .compatible = "fsl,p2020-guts", },
 211         { .compatible = "fsl,bsc9131-guts", },
 212         { .compatible = "fsl,bsc9132-guts", },
 213         { .compatible = "fsl,mpc8536-guts", },
 214         { .compatible = "fsl,mpc8544-guts", },
 215         { .compatible = "fsl,mpc8548-guts", },
 216         { .compatible = "fsl,mpc8568-guts", },
 217         { .compatible = "fsl,mpc8569-guts", },
 218         { .compatible = "fsl,mpc8572-guts", },
 219         { .compatible = "fsl,ls1021a-dcfg", },
 220         { .compatible = "fsl,ls1043a-dcfg", },
 221         { .compatible = "fsl,ls2080a-dcfg", },
 222         { .compatible = "fsl,ls1088a-dcfg", },
 223         { .compatible = "fsl,ls1012a-dcfg", },
 224         { .compatible = "fsl,ls1046a-dcfg", },
 225         {}
 226 };
 227 MODULE_DEVICE_TABLE(of, fsl_guts_of_match);
 228
 229 static struct platform_driver fsl_guts_driver = {
 230         .driver = {
 231                 .name = "fsl-guts",
 232                 .of_match_table = fsl_guts_of_match,
 233         },
 234         .probe = fsl_guts_probe,
 235         .remove = fsl_guts_remove,
 236 };
 237
 238 static int __init fsl_guts_init(void)
 239 {
 240         return platform_driver_register(&fsl_guts_driver);
 241 }
 242 core_initcall(fsl_guts_init);
 243
 244 static void __exit fsl_guts_exit(void)
 245 {
 246         platform_driver_unregister(&fsl_guts_driver);
 247 }
 248 module_exit(fsl_guts_exit);