1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2016 Socionext Inc.
3*4882a593Smuzhiyun * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <mmc.h>
10*4882a593Smuzhiyun #include <linux/errno.h>
11*4882a593Smuzhiyun
find_first_mmc_device(void)12*4882a593Smuzhiyun static int find_first_mmc_device(void)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun struct mmc *mmc;
15*4882a593Smuzhiyun int i;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun for (i = 0; (mmc = find_mmc_device(i)); i++) {
18*4882a593Smuzhiyun if (!mmc_init(mmc) && IS_MMC(mmc))
19*4882a593Smuzhiyun return i;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun return -ENODEV;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
mmc_get_env_dev(void)25*4882a593Smuzhiyun int mmc_get_env_dev(void)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun return find_first_mmc_device();
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
do_mmcsetn(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])30*4882a593Smuzhiyun static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun int dev;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun dev = find_first_mmc_device();
35*4882a593Smuzhiyun if (dev < 0)
36*4882a593Smuzhiyun return CMD_RET_FAILURE;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun env_set_ulong("mmc_first_dev", dev);
39*4882a593Smuzhiyun return CMD_RET_SUCCESS;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun U_BOOT_CMD(
43*4882a593Smuzhiyun mmcsetn, 1, 1, do_mmcsetn,
44*4882a593Smuzhiyun "Set the first MMC (not SD) dev number to \"mmc_first_dev\" environment",
45*4882a593Smuzhiyun ""
46*4882a593Smuzhiyun );
47