1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2016 Freescale Semiconductor, Inc.
4  * Copyright 2018 NXP
5  *
6  */
7 
8 #include <vsprintf.h>
9 #include <linux/errno.h>
10 #include <asm/io.h>
11 #include <env.h>
12 #include <command.h>
13 #include <stdbool.h>
14 #include <mmc.h>
15 
check_mmc_autodetect(void)16 static int check_mmc_autodetect(void)
17 {
18 	char *autodetect_str = env_get("mmcautodetect");
19 
20 	if ((autodetect_str) && (strcmp(autodetect_str, "yes") == 0))
21 		return 1;
22 
23 	return 0;
24 }
25 
26 /* This should be defined for each board */
mmc_map_to_kernel_blk(int dev_no)27 __weak int mmc_map_to_kernel_blk(int dev_no)
28 {
29 	return dev_no;
30 }
31 
board_late_mmc_env_init(void)32 void board_late_mmc_env_init(void)
33 {
34 	char cmd[32];
35 	char mmcblk[32];
36 	u32 dev_no = mmc_get_env_dev();
37 
38 	if (!check_mmc_autodetect())
39 		return;
40 
41 	env_set_ulong("mmcdev", dev_no);
42 
43 	/* Set mmcblk env */
44 	sprintf(mmcblk, "/dev/mmcblk%dp2 rootwait rw",
45 		mmc_map_to_kernel_blk(dev_no));
46 	env_set("mmcroot", mmcblk);
47 
48 	sprintf(cmd, "mmc dev %d", dev_no);
49 	run_command(cmd, 0);
50 }
51