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_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
  43         case SOC_UNIPHIER_LD11:
  44         case SOC_UNIPHIER_LD20:
  45                 return uniphier_ld20_boot_device();
  46 #endif
  47         default:
  48                 return BOOT_DEVICE_NONE;
  49         }
  50 }
  51
  52 u32 spl_boot_device(void)
  53 {
  54         u32 mode;
  55
  56         mode = spl_boot_device_raw();
  57
  58         switch (uniphier_get_soc_type()) {
  59 #if defined(CONFIG_ARCH_UNIPHIER_PXS2) || defined(CONFIG_ARCH_UNIPHIER_LD6B)
  60         case SOC_UNIPHIER_PXS2:
  61         case SOC_UNIPHIER_LD6B:
  62                 if (mode == BOOT_DEVICE_USB)
  63                         mode = BOOT_DEVICE_NOR;
  64                 break;
  65 #endif
  66 #if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
  67         case SOC_UNIPHIER_LD11:
  68         case SOC_UNIPHIER_LD20:
  69                 if (mode == BOOT_DEVICE_MMC1 || mode == BOOT_DEVICE_USB)
  70                         mode = BOOT_DEVICE_BOARD;
  71                 break;
  72 #endif
  73         default:
  74                 break;
  75         }
  76
  77         return mode;
  78 }
  79
  80 u32 spl_boot_mode(const u32 boot_device)
  81 {
  82         struct mmc *mmc;
  83
  84         /*
  85          * work around a bug in the Boot ROM of PH1-sLD3, LD4, Pro4, and sLD8:
  86          *
  87          * The boot ROM in these SoCs breaks the PARTITION_CONFIG [179] of
  88          * Extended CSD register; when switching to the Boot Partition 1, the
  89          * Boot ROM should issue the SWITCH command (CMD6) with Set Bits for
  90          * the Access Bits, but in fact it uses Write Byte for the Access Bits.
  91          * As a result, the BOOT_PARTITION_ENABLE field of the PARTITION_CONFIG
  92          * is lost.  This bug was fixed for PH1-Pro5 and later SoCs.
  93          *
  94          * Fixup mmc->part_config here because it is used to determine the
  95          * partition which the U-Boot image is read from.
  96          */
  97         mmc = find_mmc_device(0);
  98         mmc->part_config &= ~EXT_CSD_BOOT_PART_NUM(PART_ACCESS_MASK);
  99         mmc->part_config |= EXT_CSD_BOOT_PARTITION_ENABLE;
 100
 101         return MMCSD_MODE_EMMCBOOT;
 102 }
 103
 104 #if defined(CONFIG_DM_MMC) && !defined(CONFIG_SPL_BUILD)
 105 static int find_first_mmc_device(void)
 106 {
 107         struct mmc *mmc;
 108         int i;
 109
 110         for (i = 0; (mmc = find_mmc_device(i)); i++) {
 111                 if (!mmc_init(mmc) && IS_MMC(mmc))
 112                         return i;
 113         }
 114
 115         return -ENODEV;
 116 }
 117
 118 int mmc_get_env_dev(void)
 119 {
 120         return find_first_mmc_device();
 121 }
 122
 123 static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 124 {
 125         int dev;
 126
 127         dev = find_first_mmc_device();
 128         if (dev < 0)
 129                 return CMD_RET_FAILURE;
 130
 131         setenv_ulong("mmc_first_dev", dev);
 132         return CMD_RET_SUCCESS;
 133 }
 134
 135 U_BOOT_CMD(
 136            mmcsetn,     1,      1,      do_mmcsetn,
 137         "Set the first MMC (not SD) dev number to \"mmc_first_dev\" environment",
 138         ""
 139 );
 140 #endif