drivers/soc/soc_ti_k3.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
   4  *      Dave Gerlach <d-gerlach@ti.com>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <soc.h>
  10
  11 #include <asm/arch/hardware.h>
  12 #include <asm/io.h>
  13
  14 struct soc_ti_k3_plat {
  15         const char *family;
  16         const char *revision;
  17 };
  18
  19 static const char *get_family_string(u32 idreg)
  20 {
  21         const char *family;
  22         u32 soc;
  23
  24         soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
  25
  26         switch (soc) {
  27         case JTAG_ID_PARTNO_AM65X:
  28                 family = "AM65X";
  29                 break;
  30         case JTAG_ID_PARTNO_J721E:
  31                 family = "J721E";
  32                 break;
  33         case JTAG_ID_PARTNO_J7200:
  34                 family = "J7200";
  35                 break;
  36         case JTAG_ID_PARTNO_AM64X:
  37                 family = "AM64X";
  38                 break;
  39         case JTAG_ID_PARTNO_J721S2:
  40                 family = "J721S2";
  41                 break;
  42         case JTAG_ID_PARTNO_AM62X:
  43                 family = "AM62X";
  44                 break;
  45         case JTAG_ID_PARTNO_AM62AX:
  46                 family = "AM62AX";
  47                 break;
  48         default:
  49                 family = "Unknown Silicon";
  50         };
  51
  52         return family;
  53 }
  54
  55 static char *j721e_rev_string_map[] = {
  56         "1.0", "1.1",
  57 };
  58
  59 static char *typical_rev_string_map[] = {
  60         "1.0", "2.0", "3.0",
  61 };
  62
  63 static const char *get_rev_string(u32 idreg)
  64 {
  65         u32 rev;
  66         u32 soc;
  67
  68         rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
  69         soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
  70
  71         switch (soc) {
  72         case JTAG_ID_PARTNO_J721E:
  73                 if (rev >= ARRAY_SIZE(j721e_rev_string_map))
  74                         goto bail;
  75                 return j721e_rev_string_map[rev];
  76
  77         default:
  78                 if (rev >= ARRAY_SIZE(typical_rev_string_map))
  79                         goto bail;
  80                 return typical_rev_string_map[rev];
  81         };
  82
  83 bail:
  84         return "Unknown Revision";
  85 }
  86
  87 static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
  88 {
  89         struct soc_ti_k3_plat *plat = dev_get_plat(dev);
  90
  91         snprintf(buf, size, "%s", plat->family);
  92
  93         return 0;
  94 }
  95
  96 static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
  97 {
  98         struct soc_ti_k3_plat *plat = dev_get_plat(dev);
  99
 100         snprintf(buf, size, "SR%s", plat->revision);
 101
 102         return 0;
 103 }
 104
 105 static const struct soc_ops soc_ti_k3_ops = {
 106         .get_family = soc_ti_k3_get_family,
 107         .get_revision = soc_ti_k3_get_revision,
 108 };
 109
 110 int soc_ti_k3_probe(struct udevice *dev)
 111 {
 112         struct soc_ti_k3_plat *plat = dev_get_plat(dev);
 113         u32 idreg;
 114         void *idreg_addr;
 115
 116         idreg_addr = dev_read_addr_ptr(dev);
 117         if (!idreg_addr)
 118                 return -EINVAL;
 119
 120         idreg = readl(idreg_addr);
 121
 122         plat->family = get_family_string(idreg);
 123         plat->revision = get_rev_string(idreg);
 124
 125         return 0;
 126 }
 127
 128 static const struct udevice_id soc_ti_k3_ids[] = {
 129         { .compatible = "ti,am654-chipid" },
 130         { }
 131 };
 132
 133 U_BOOT_DRIVER(soc_ti_k3) = {
 134         .name           = "soc_ti_k3",
 135         .id             = UCLASS_SOC,
 136         .ops            = &soc_ti_k3_ops,
 137         .of_match       = soc_ti_k3_ids,
 138         .probe          = soc_ti_k3_probe,
 139         .plat_auto      = sizeof(struct soc_ti_k3_plat),
 140 };