1 /*
2  * Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <spl.h>
9 #include <libfdt.h>
10 #include <nand.h>
11 #include <linux/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 struct uniphier_fdt_file {
30 	const char *compatible;
31 	const char *file_name;
32 };
33 
34 static const struct uniphier_fdt_file uniphier_fdt_files[] = {
35 	{ "socionext,ph1-ld4-ref", "uniphier-ph1-ld4-ref.dtb", },
36 	{ "socionext,ph1-ld6b-ref", "uniphier-ph1-ld6b-ref.dtb", },
37 	{ "socionext,ph1-ld10-ref", "uniphier-ph1-ld10-ref.dtb", },
38 	{ "socionext,ph1-pro4-ref", "uniphier-ph1-pro4-ref.dtb", },
39 	{ "socionext,ph1-pro5-4kbox", "uniphier-ph1-pro5-4kbox.dtb", },
40 	{ "socionext,ph1-sld3-ref", "uniphier-ph1-sld3-ref.dtb", },
41 	{ "socionext,ph1-sld8-ref", "uniphier-ph1-sld8-ref.dtb", },
42 	{ "socionext,proxstream2-gentil", "uniphier-proxstream2-gentil.dtb", },
43 	{ "socionext,proxstream2-vodka", "uniphier-proxstream2-vodka.dtb", },
44 };
45 
46 static void uniphier_set_fdt_file(void)
47 {
48 	DECLARE_GLOBAL_DATA_PTR;
49 	int i;
50 
51 	/* lookup DTB file name based on the compatible string */
52 	for (i = 0; i < ARRAY_SIZE(uniphier_fdt_files); i++) {
53 		if (!fdt_node_check_compatible(gd->fdt_blob, 0,
54 					uniphier_fdt_files[i].compatible)) {
55 			setenv("fdt_file", uniphier_fdt_files[i].file_name);
56 			return;
57 		}
58 	}
59 }
60 
61 int board_late_init(void)
62 {
63 	puts("MODE:  ");
64 
65 	switch (spl_boot_device()) {
66 	case BOOT_DEVICE_MMC1:
67 		printf("eMMC Boot\n");
68 		setenv("bootmode", "emmcboot");
69 		break;
70 	case BOOT_DEVICE_NAND:
71 		printf("NAND Boot\n");
72 		setenv("bootmode", "nandboot");
73 		nand_denali_wp_disable();
74 		break;
75 	case BOOT_DEVICE_NOR:
76 		printf("NOR Boot\n");
77 		setenv("bootmode", "norboot");
78 		break;
79 	default:
80 		printf("Unsupported Boot Mode\n");
81 		return -1;
82 	}
83 
84 	uniphier_set_fdt_file();
85 
86 	return 0;
87 }
88