summaryrefslogtreecommitdiff
path: root/arch/arm/mach-at91/spl.c
blob: c4ed224d03dffa9ef0f19172cba33ca6fea9e496 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
/*
 * Copyright (C) 2013 Atmel Corporation
 *		      Bo Shen <voice.shen@atmel.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <asm/io.h>
#include <asm/arch/at91_common.h>
#include <asm/arch/at91_wdt.h>
#include <asm/arch/clk.h>
#include <spl.h>

#if defined(CONFIG_AT91SAM9_WATCHDOG)
void at91_disable_wdt(void) { }
#else
void at91_disable_wdt(void)
{
	struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT;

	writel(AT91_WDT_MR_WDDIS, &wdt->mr);
}
#endif

#if defined(CONFIG_SAMA5D2)
struct {
	u32	r4;
} bootrom_stash __attribute__((section(".data")));

u32 spl_boot_device(void)
{
	u32 dev = (bootrom_stash.r4 >> ATMEL_SAMA5D2_BOOT_FROM_OFF) &
		  ATMEL_SAMA5D2_BOOT_FROM_MASK;
	u32 off = (bootrom_stash.r4 >> ATMEL_SAMA5D2_BOOT_DEV_ID_OFF) &
		  ATMEL_SAMA5D2_BOOT_DEV_ID_MASK;

#if defined(CONFIG_SYS_USE_MMC)
	if (dev == ATMEL_SAMA5D2_BOOT_FROM_MCI) {
		if (off == 0)
			return BOOT_DEVICE_MMC1;
		if (off == 1)
			return BOOT_DEVICE_MMC2;
		printf("ERROR: MMC controller %i not present!\n", dev);
		hang();
	}
#endif

#if defined(CONFIG_SYS_USE_SERIALFLASH) || defined(CONFIG_SYS_USE_SPIFLASH)
	if (dev == ATMEL_SAMA5D2_BOOT_FROM_SPI)
		return BOOT_DEVICE_SPI;
#endif

	printf("ERROR: SMC/TWI/QSPI boot device not supported!\n"
	       "       Boot device %i, controller number %i\n", dev, off);

	return BOOT_DEVICE_NONE;
}
#else
u32 spl_boot_device(void)
{
#ifdef CONFIG_SYS_USE_MMC
	return BOOT_DEVICE_MMC1;
#elif CONFIG_SYS_USE_NANDFLASH
	return BOOT_DEVICE_NAND;
#elif CONFIG_SYS_USE_SERIALFLASH || CONFIG_SYS_USE_SPIFLASH
	return BOOT_DEVICE_SPI;
#endif
	return BOOT_DEVICE_NONE;
}
#endif

u32 spl_boot_mode(void)
{
	switch (spl_boot_device()) {
#ifdef CONFIG_SYS_USE_MMC
	case BOOT_DEVICE_MMC1:
	case BOOT_DEVICE_MMC2:
		return MMCSD_MODE_FS;
		break;
#endif
	case BOOT_DEVICE_NONE:
	default:
		hang();
	}
}