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Merge branch 'master' of git://git.denx.de/u-boot-samsung
[u-boot] / arch / arm / mach-uniphier / board_late_init.c
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 #include "boot-mode/boot-device.h"
15
16 static void nand_denali_wp_disable(void)
17 {
18 #ifdef CONFIG_NAND_DENALI
19         /*
20          * Since the boot rom enables the write protection for NAND boot mode,
21          * it must be disabled somewhere for "nand write", "nand erase", etc.
22          * The workaround is here to not disturb the Denali NAND controller
23          * driver just for a really SoC-specific thing.
24          */
25         void __iomem *denali_reg = (void __iomem *)CONFIG_SYS_NAND_REGS_BASE;
26
27         writel(WRITE_PROTECT__FLAG, denali_reg + WRITE_PROTECT);
28 #endif
29 }
30
31 #define VENDOR_PREFIX           "socionext,"
32 #define DTB_FILE_PREFIX         "uniphier-"
33
34 static int uniphier_set_fdt_file(void)
35 {
36         DECLARE_GLOBAL_DATA_PTR;
37         const char *compat;
38         char dtb_name[256];
39         int buf_len = 256;
40         int ret;
41
42         ret = fdt_get_string(gd->fdt_blob, 0, "compatible", &compat);
43         if (ret)
44                 return -EINVAL;
45
46         if (strncmp(compat, VENDOR_PREFIX, strlen(VENDOR_PREFIX)))
47                 return -EINVAL;
48
49         compat += strlen(VENDOR_PREFIX);
50
51         strncat(dtb_name, DTB_FILE_PREFIX, buf_len);
52         buf_len -= strlen(DTB_FILE_PREFIX);
53
54         strncat(dtb_name, compat, buf_len);
55         buf_len -= strlen(compat);
56
57         strncat(dtb_name, ".dtb", buf_len);
58
59         setenv("fdt_file", dtb_name);
60
61         return 0;
62 }
63
64 int board_late_init(void)
65 {
66         puts("MODE:  ");
67
68         switch (spl_boot_device_raw()) {
69         case BOOT_DEVICE_MMC1:
70                 printf("eMMC Boot\n");
71                 setenv("bootmode", "emmcboot");
72                 break;
73         case BOOT_DEVICE_NAND:
74                 printf("NAND Boot\n");
75                 setenv("bootmode", "nandboot");
76                 nand_denali_wp_disable();
77                 break;
78         case BOOT_DEVICE_NOR:
79                 printf("NOR Boot\n");
80                 setenv("bootmode", "norboot");
81                 break;
82         case BOOT_DEVICE_USB:
83                 printf("USB Boot\n");
84                 setenv("bootmode", "usbboot");
85                 break;
86         default:
87                 printf("Unknown\n");
88                 break;
89         }
90
91         if (uniphier_set_fdt_file())
92                 printf("fdt_file environment was not set correctly\n");
93
94         return 0;
95 }