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 <common.h>
8 #include <mmc.h>
9 #include <linux/errno.h>
10
find_first_mmc_device(void)11 static int find_first_mmc_device(void)
12 {
13 struct mmc *mmc;
14 int i;
15
16 for (i = 0; (mmc = find_mmc_device(i)); i++) {
17 if (!mmc_init(mmc) && IS_MMC(mmc))
18 return i;
19 }
20
21 return -ENODEV;
22 }
23
mmc_get_env_dev(void)24 int mmc_get_env_dev(void)
25 {
26 return find_first_mmc_device();
27 }
28
do_mmcsetn(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])29 static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
30 {
31 int dev;
32
33 dev = find_first_mmc_device();
34 if (dev < 0)
35 return CMD_RET_FAILURE;
36
37 env_set_ulong("mmc_first_dev", dev);
38 return CMD_RET_SUCCESS;
39 }
40
41 U_BOOT_CMD(
42 mmcsetn, 1, 1, do_mmcsetn,
43 "Set the first MMC (not SD) dev number to \"mmc_first_dev\" environment",
44 ""
45 );
46