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ARM: uniphier: add a command to find the first MMC (non-SD) device
[people/ms/u-boot.git] / arch / arm / mach-uniphier / boot-mode / boot-mode.c
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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>
a55d9fee 8#include <mmc.h>
323d1f9d 9#include <spl.h>
569e4be1 10#include <linux/err.h>
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11
12#include "../sbc/sbc-regs.h"
13#include "../soc-info.h"
14#include "boot-device.h"
323d1f9d 15
fec48163 16u32 spl_boot_device_raw(void)
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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();
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33#endif
34#if defined(CONFIG_ARCH_UNIPHIER_PH1_PRO5)
35 case SOC_UNIPHIER_PH1_PRO5:
36 return ph1_pro5_boot_device();
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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();
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43#endif
44 default:
45 return BOOT_DEVICE_NONE;
46 }
47}
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48
49u32 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}
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57
58u32 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}
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81
82#if defined(CONFIG_DM_MMC) && !defined(CONFIG_SPL_BUILD)
83static 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
96static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
97{
98 int dev;
99
100 dev = find_first_mmc_device();
101 if (dev < 0)
102 return CMD_RET_FAILURE;
103
104 setenv_ulong("mmc_first_dev", dev);
105 return CMD_RET_SUCCESS;
106}
107
108U_BOOT_CMD(
109 mmcsetn, 1, 1, do_mmcsetn,
110 "Set the first MMC (not SD) dev number to \"mmc_first_dev\" enviroment",
111 ""
112);
113#endif