1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016 Socionext Inc.
4 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5 */
6
7 #include <command.h>
8 #include <env.h>
9 #include <mmc.h>
10 #include <linux/errno.h>
11
find_first_mmc_device(bool is_sd)12 static int find_first_mmc_device(bool is_sd)
13 {
14 struct mmc *mmc;
15 int i;
16
17 for (i = 0; (mmc = find_mmc_device(i)); i++) {
18 if (!mmc_init(mmc) &&
19 ((is_sd && IS_SD(mmc)) || (!is_sd && IS_MMC(mmc))))
20 return i;
21 }
22
23 return -ENODEV;
24 }
25
mmc_get_env_dev(void)26 int mmc_get_env_dev(void)
27 {
28 return find_first_mmc_device(false);
29 }
30
do_mmcsetn(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])31 static int do_mmcsetn(struct cmd_tbl *cmdtp, int flag, int argc,
32 char *const argv[])
33 {
34 int dev;
35
36 dev = find_first_mmc_device(false);
37 if (dev < 0)
38 return CMD_RET_FAILURE;
39
40 env_set_ulong("mmc_first_dev", dev);
41 return CMD_RET_SUCCESS;
42 }
43
44 U_BOOT_CMD(
45 mmcsetn, 1, 1, do_mmcsetn,
46 "Set the first MMC (not SD) dev number to \"mmc_first_dev\" environment",
47 ""
48 );
49
do_sdsetn(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])50 static int do_sdsetn(struct cmd_tbl *cmdtp, int flag, int argc,
51 char *const argv[])
52 {
53 int dev;
54
55 dev = find_first_mmc_device(true);
56 if (dev < 0)
57 return CMD_RET_FAILURE;
58
59 env_set_ulong("sd_first_dev", dev);
60 return CMD_RET_SUCCESS;
61 }
62
63 U_BOOT_CMD(
64 sdsetn, 1, 1, do_sdsetn,
65 "Set the first SD dev number to \"sd_first_dev\" environment",
66 ""
67 );
68