drivers/soc/fsl/guts.c

   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
  17 struct guts {
  18         struct ccsr_guts __iomem *regs;
  19         bool little_endian;
  20 };
  21
  22 struct fsl_soc_die_attr {
  23         char    *die;
  24         u32     svr;
  25         u32     mask;
  26 };
  27
  28 static struct guts *guts;
  29 static struct soc_device_attribute soc_dev_attr;
  30 static struct soc_device *soc_dev;
  31 static struct device_node *root;
  32
  33
  34 /* SoC die attribute definition for QorIQ platform */
  35 static 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
 113 static 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
 124 static 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
 139 static 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
 197 static 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  */
 208 static 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 };
 235 MODULE_DEVICE_TABLE(of, fsl_guts_of_match);
 236
 237 static 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
 246 static int __init fsl_guts_init(void)
 247 {
 248         return platform_driver_register(&fsl_guts_driver);
 249 }
 250 core_initcall(fsl_guts_init);
 251
 252 static void __exit fsl_guts_exit(void)
 253 {
 254         platform_driver_unregister(&fsl_guts_driver);
 255 }
 256 module_exit(fsl_guts_exit);