1*e5957e8dSMasahiro Yamada /* 2*e5957e8dSMasahiro Yamada * Copyright (C) 2016 Socionext Inc. 3*e5957e8dSMasahiro Yamada * Author: Masahiro Yamada <yamada.masahiro@socionext.com> 4*e5957e8dSMasahiro Yamada * 5*e5957e8dSMasahiro Yamada * SPDX-License-Identifier: GPL-2.0+ 6*e5957e8dSMasahiro Yamada */ 7*e5957e8dSMasahiro Yamada 8*e5957e8dSMasahiro Yamada #include <common.h> 9*e5957e8dSMasahiro Yamada #include <mmc.h> 10*e5957e8dSMasahiro Yamada #include <linux/errno.h> 11*e5957e8dSMasahiro Yamada 12*e5957e8dSMasahiro Yamada static int find_first_mmc_device(void) 13*e5957e8dSMasahiro Yamada { 14*e5957e8dSMasahiro Yamada struct mmc *mmc; 15*e5957e8dSMasahiro Yamada int i; 16*e5957e8dSMasahiro Yamada 17*e5957e8dSMasahiro Yamada for (i = 0; (mmc = find_mmc_device(i)); i++) { 18*e5957e8dSMasahiro Yamada if (!mmc_init(mmc) && IS_MMC(mmc)) 19*e5957e8dSMasahiro Yamada return i; 20*e5957e8dSMasahiro Yamada } 21*e5957e8dSMasahiro Yamada 22*e5957e8dSMasahiro Yamada return -ENODEV; 23*e5957e8dSMasahiro Yamada } 24*e5957e8dSMasahiro Yamada 25*e5957e8dSMasahiro Yamada int mmc_get_env_dev(void) 26*e5957e8dSMasahiro Yamada { 27*e5957e8dSMasahiro Yamada return find_first_mmc_device(); 28*e5957e8dSMasahiro Yamada } 29*e5957e8dSMasahiro Yamada 30*e5957e8dSMasahiro Yamada static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 31*e5957e8dSMasahiro Yamada { 32*e5957e8dSMasahiro Yamada int dev; 33*e5957e8dSMasahiro Yamada 34*e5957e8dSMasahiro Yamada dev = find_first_mmc_device(); 35*e5957e8dSMasahiro Yamada if (dev < 0) 36*e5957e8dSMasahiro Yamada return CMD_RET_FAILURE; 37*e5957e8dSMasahiro Yamada 38*e5957e8dSMasahiro Yamada setenv_ulong("mmc_first_dev", dev); 39*e5957e8dSMasahiro Yamada return CMD_RET_SUCCESS; 40*e5957e8dSMasahiro Yamada } 41*e5957e8dSMasahiro Yamada 42*e5957e8dSMasahiro Yamada U_BOOT_CMD( 43*e5957e8dSMasahiro Yamada mmcsetn, 1, 1, do_mmcsetn, 44*e5957e8dSMasahiro Yamada "Set the first MMC (not SD) dev number to \"mmc_first_dev\" environment", 45*e5957e8dSMasahiro Yamada "" 46*e5957e8dSMasahiro Yamada ); 47