Merge branch 'master' of git://git.denx.de/u-boot-video
[oweals/u-boot.git] / arch / arm / mach-at91 / spl.c
1 /*
2  * Copyright (C) 2013 Atmel Corporation
3  *                    Bo Shen <voice.shen@atmel.com>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <asm/io.h>
10 #include <asm/arch/at91_common.h>
11 #include <asm/arch/at91_wdt.h>
12 #include <asm/arch/clk.h>
13 #include <spl.h>
14
15 #if defined(CONFIG_AT91SAM9_WATCHDOG)
16 void at91_disable_wdt(void) { }
17 #else
18 void at91_disable_wdt(void)
19 {
20         struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT;
21
22         writel(AT91_WDT_MR_WDDIS, &wdt->mr);
23 }
24 #endif
25
26 #if defined(CONFIG_SAMA5D2) || defined(CONFIG_SAMA5D3) || \
27     defined(CONFIG_SAMA5D4)
28 #include <asm/arch/sama5_boot.h>
29 struct {
30         u32     r4;
31 } bootrom_stash __attribute__((section(".data")));
32
33 u32 spl_boot_device(void)
34 {
35         u32 dev = (bootrom_stash.r4 >> ATMEL_SAMA5_BOOT_FROM_OFF) &
36                   ATMEL_SAMA5_BOOT_FROM_MASK;
37         u32 off = (bootrom_stash.r4 >> ATMEL_SAMA5_BOOT_DEV_ID_OFF) &
38                   ATMEL_SAMA5_BOOT_DEV_ID_MASK;
39
40 #if defined(CONFIG_SYS_USE_MMC)
41         if (dev == ATMEL_SAMA5_BOOT_FROM_MCI) {
42 #if defined(CONFIG_SPL_OF_CONTROL)
43                 return BOOT_DEVICE_MMC1;
44 #else
45                 if (off == 0)
46                         return BOOT_DEVICE_MMC1;
47                 if (off == 1)
48                         return BOOT_DEVICE_MMC2;
49                 printf("ERROR: MMC controller %i not present!\n", dev);
50                 hang();
51 #endif
52         }
53 #endif
54
55 #if defined(CONFIG_SYS_USE_SERIALFLASH) || defined(CONFIG_SYS_USE_SPIFLASH)
56         if (dev == ATMEL_SAMA5_BOOT_FROM_SPI)
57                 return BOOT_DEVICE_SPI;
58 #endif
59
60         if (dev == ATMEL_SAMA5_BOOT_FROM_SMC)
61                 return BOOT_DEVICE_NAND;
62
63         if (dev == ATMEL_SAMA5_BOOT_FROM_SAMBA)
64                 return BOOT_DEVICE_USB;
65
66         printf("ERROR: SMC/TWI/QSPI boot device not supported!\n"
67                "       Boot device %i, controller number %i\n", dev, off);
68
69         return BOOT_DEVICE_NONE;
70 }
71 #else
72 u32 spl_boot_device(void)
73 {
74 #ifdef CONFIG_SYS_USE_MMC
75         return BOOT_DEVICE_MMC1;
76 #elif CONFIG_SYS_USE_NANDFLASH
77         return BOOT_DEVICE_NAND;
78 #elif CONFIG_SYS_USE_SERIALFLASH || CONFIG_SYS_USE_SPIFLASH
79         return BOOT_DEVICE_SPI;
80 #endif
81         return BOOT_DEVICE_NONE;
82 }
83 #endif
84
85 u32 spl_boot_mode(const u32 boot_device)
86 {
87         switch (boot_device) {
88 #ifdef CONFIG_SYS_USE_MMC
89         case BOOT_DEVICE_MMC1:
90         case BOOT_DEVICE_MMC2:
91                 return MMCSD_MODE_FS;
92                 break;
93 #endif
94         case BOOT_DEVICE_NONE:
95         default:
96                 hang();
97         }
98 }