arch/arm/mach-uniphier/boot-mode/boot-mode.c

   1 /*
   2  * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <mmc.h>
   9 #include <spl.h>
  10 #include <linux/err.h>
  11
  12 #include "../sbc/sbc-regs.h"
  13 #include "../soc-info.h"
  14 #include "boot-device.h"
  15
  16 u32 spl_boot_device_raw(void)
  17 {
  18         if (boot_is_swapped())
  19                 return BOOT_DEVICE_NOR;
  20
  21         switch (uniphier_get_soc_type()) {
  22 #if defined(CONFIG_ARCH_UNIPHIER_PH1_SLD3)
  23         case SOC_UNIPHIER_PH1_SLD3:
  24                 return ph1_sld3_boot_device();
  25 #endif
  26 #if defined(CONFIG_ARCH_UNIPHIER_PH1_LD4) || \
  27         defined(CONFIG_ARCH_UNIPHIER_PH1_PRO4) || \
  28         defined(CONFIG_ARCH_UNIPHIER_PH1_SLD8)
  29         case SOC_UNIPHIER_PH1_LD4:
  30         case SOC_UNIPHIER_PH1_PRO4:
  31         case SOC_UNIPHIER_PH1_SLD8:
  32                 return ph1_ld4_boot_device();
  33 #endif
  34 #if defined(CONFIG_ARCH_UNIPHIER_PH1_PRO5)
  35         case SOC_UNIPHIER_PH1_PRO5:
  36                 return ph1_pro5_boot_device();
  37 #endif
  38 #if defined(CONFIG_ARCH_UNIPHIER_PROXSTREAM2) || \
  39         defined(CONFIG_ARCH_UNIPHIER_PH1_LD6B)
  40         case SOC_UNIPHIER_PROXSTREAM2:
  41         case SOC_UNIPHIER_PH1_LD6B:
  42                 return proxstream2_boot_device();
  43 #endif
  44         default:
  45                 return BOOT_DEVICE_NONE;
  46         }
  47 }
  48
  49 u32 spl_boot_device(void)
  50 {
  51         u32 ret;
  52
  53         ret = spl_boot_device_raw();
  54
  55         return ret == BOOT_DEVICE_USB ? BOOT_DEVICE_NOR : ret;
  56 }
  57
  58 u32 spl_boot_mode(void)
  59 {
  60         struct mmc *mmc;
  61
  62         /*
  63          * work around a bug in the Boot ROM of PH1-sLD3, LD4, Pro4, and sLD8:
  64          *
  65          * The boot ROM in these SoCs breaks the PARTITION_CONFIG [179] of
  66          * Extended CSD register; when switching to the Boot Partition 1, the
  67          * Boot ROM should issue the SWITCH command (CMD6) with Set Bits for
  68          * the Access Bits, but in fact it uses Write Byte for the Access Bits.
  69          * As a result, the BOOT_PARTITION_ENABLE field of the PARTITION_CONFIG
  70          * is lost.  This bug was fixed for PH1-Pro5 and later SoCs.
  71          *
  72          * Fixup mmc->part_config here because it is used to determine the
  73          * partition which the U-Boot image is read from.
  74          */
  75         mmc = find_mmc_device(0);
  76         mmc->part_config &= ~EXT_CSD_BOOT_PART_NUM(PART_ACCESS_MASK);
  77         mmc->part_config |= EXT_CSD_BOOT_PARTITION_ENABLE;
  78
  79         return MMCSD_MODE_EMMCBOOT;
  80 }
  81
  82 #if defined(CONFIG_DM_MMC) && !defined(CONFIG_SPL_BUILD)
  83 static int find_first_mmc_device(void)
  84 {
  85         struct mmc *mmc;
  86         int i;
  87
  88         for (i = 0; (mmc = find_mmc_device(i)); i++) {
  89                 if (!mmc_init(mmc) && IS_MMC(mmc))
  90                         return i;
  91         }
  92
  93         return -ENODEV;
  94 }
  95
  96 int mmc_get_env_dev(void)
  97 {
  98         return find_first_mmc_device();
  99 }
 100
 101 static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 102 {
 103         int dev;
 104
 105         dev = find_first_mmc_device();
 106         if (dev < 0)
 107                 return CMD_RET_FAILURE;
 108
 109         setenv_ulong("mmc_first_dev", dev);
 110         return CMD_RET_SUCCESS;
 111 }
 112
 113 U_BOOT_CMD(
 114            mmcsetn,     1,      1,      do_mmcsetn,
 115         "Set the first MMC (not SD) dev number to \"mmc_first_dev\" enviroment",
 116         ""
 117 );
 118 #endif