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_SLD3)
  23         case SOC_UNIPHIER_SLD3:
  24                 return uniphier_sld3_boot_device();
  25 #endif
  26 #if defined(CONFIG_ARCH_UNIPHIER_LD4) || defined(CONFIG_ARCH_UNIPHIER_PRO4) || \
  27         defined(CONFIG_ARCH_UNIPHIER_SLD8)
  28         case SOC_UNIPHIER_LD4:
  29         case SOC_UNIPHIER_PRO4:
  30         case SOC_UNIPHIER_SLD8:
  31                 return uniphier_ld4_boot_device();
  32 #endif
  33 #if defined(CONFIG_ARCH_UNIPHIER_PRO5)
  34         case SOC_UNIPHIER_PRO5:
  35                 return uniphier_pro5_boot_device();
  36 #endif
  37 #if defined(CONFIG_ARCH_UNIPHIER_PXS2) || defined(CONFIG_ARCH_UNIPHIER_LD6B)
  38         case SOC_UNIPHIER_PXS2:
  39         case SOC_UNIPHIER_LD6B:
  40                 return uniphier_pxs2_boot_device();
  41 #endif
  42 #if defined(CONFIG_ARCH_UNIPHIER_LD20)
  43         case SOC_UNIPHIER_LD20:
  44                 return uniphier_ld20_boot_device();
  45 #endif
  46         default:
  47                 return BOOT_DEVICE_NONE;
  48         }
  49 }
  50
  51 u32 spl_boot_device(void)
  52 {
  53         u32 ret;
  54
  55         ret = spl_boot_device_raw();
  56
  57         return ret == BOOT_DEVICE_USB ? BOOT_DEVICE_NOR : ret;
  58 }
  59
  60 u32 spl_boot_mode(void)
  61 {
  62         struct mmc *mmc;
  63
  64         /*
  65          * work around a bug in the Boot ROM of PH1-sLD3, LD4, Pro4, and sLD8:
  66          *
  67          * The boot ROM in these SoCs breaks the PARTITION_CONFIG [179] of
  68          * Extended CSD register; when switching to the Boot Partition 1, the
  69          * Boot ROM should issue the SWITCH command (CMD6) with Set Bits for
  70          * the Access Bits, but in fact it uses Write Byte for the Access Bits.
  71          * As a result, the BOOT_PARTITION_ENABLE field of the PARTITION_CONFIG
  72          * is lost.  This bug was fixed for PH1-Pro5 and later SoCs.
  73          *
  74          * Fixup mmc->part_config here because it is used to determine the
  75          * partition which the U-Boot image is read from.
  76          */
  77         mmc = find_mmc_device(0);
  78         mmc->part_config &= ~EXT_CSD_BOOT_PART_NUM(PART_ACCESS_MASK);
  79         mmc->part_config |= EXT_CSD_BOOT_PARTITION_ENABLE;
  80
  81         return MMCSD_MODE_EMMCBOOT;
  82 }
  83
  84 #if defined(CONFIG_DM_MMC) && !defined(CONFIG_SPL_BUILD)
  85 static int find_first_mmc_device(void)
  86 {
  87         struct mmc *mmc;
  88         int i;
  89
  90         for (i = 0; (mmc = find_mmc_device(i)); i++) {
  91                 if (!mmc_init(mmc) && IS_MMC(mmc))
  92                         return i;
  93         }
  94
  95         return -ENODEV;
  96 }
  97
  98 int mmc_get_env_dev(void)
  99 {
 100         return find_first_mmc_device();
 101 }
 102
 103 static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 104 {
 105         int dev;
 106
 107         dev = find_first_mmc_device();
 108         if (dev < 0)
 109                 return CMD_RET_FAILURE;
 110
 111         setenv_ulong("mmc_first_dev", dev);
 112         return CMD_RET_SUCCESS;
 113 }
 114
 115 U_BOOT_CMD(
 116            mmcsetn,     1,      1,      do_mmcsetn,
 117         "Set the first MMC (not SD) dev number to \"mmc_first_dev\" enviroment",
 118         ""
 119 );
 120 #endif