1 /*
2  * Copyright (C) 2014 Panasonic Corporation
3  *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <spl.h>
10 #include <nand.h>
11 #include <asm/io.h>
12 #include <../drivers/mtd/nand/denali.h>
13 
14 static void nand_denali_wp_disable(void)
15 {
16 #ifdef CONFIG_NAND_DENALI
17 	/*
18 	 * Since the boot rom enables the write protection for NAND boot mode,
19 	 * it must be disabled somewhere for "nand write", "nand erase", etc.
20 	 * The workaround is here to not disturb the Denali NAND controller
21 	 * driver just for a really SoC-specific thing.
22 	 */
23 	void __iomem *denali_reg = (void __iomem *)CONFIG_SYS_NAND_REGS_BASE;
24 
25 	writel(WRITE_PROTECT__FLAG, denali_reg + WRITE_PROTECT);
26 #endif
27 }
28 
29 int board_late_init(void)
30 {
31 	puts("MODE:  ");
32 
33 	switch (spl_boot_device()) {
34 	case BOOT_DEVICE_MMC1:
35 		printf("eMMC Boot\n");
36 		setenv("bootmode", "emmcboot");
37 		break;
38 	case BOOT_DEVICE_NAND:
39 		printf("NAND Boot\n");
40 		setenv("bootmode", "nandboot");
41 		nand_denali_wp_disable();
42 		break;
43 	case BOOT_DEVICE_NOR:
44 		printf("NOR Boot\n");
45 		setenv("bootmode", "norboot");
46 		break;
47 	default:
48 		printf("Unsupported Boot Mode\n");
49 		return -1;
50 	}
51 
52 	return 0;
53 }
54