Merge branch 'master' of git://git.denx.de/u-boot-mpc85xx
[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)
27 struct {
28         u32     r4;
29 } bootrom_stash __attribute__((section(".data")));
30
31 u32 spl_boot_device(void)
32 {
33         u32 dev = (bootrom_stash.r4 >> ATMEL_SAMA5D2_BOOT_FROM_OFF) &
34                   ATMEL_SAMA5D2_BOOT_FROM_MASK;
35         u32 off = (bootrom_stash.r4 >> ATMEL_SAMA5D2_BOOT_DEV_ID_OFF) &
36                   ATMEL_SAMA5D2_BOOT_DEV_ID_MASK;
37
38 #if defined(CONFIG_SYS_USE_MMC)
39         if (dev == ATMEL_SAMA5D2_BOOT_FROM_MCI) {
40                 if (off == 0)
41                         return BOOT_DEVICE_MMC1;
42                 if (off == 1)
43                         return BOOT_DEVICE_MMC2;
44                 printf("ERROR: MMC controller %i not present!\n", dev);
45                 hang();
46         }
47 #endif
48
49 #if defined(CONFIG_SYS_USE_SERIALFLASH) || defined(CONFIG_SYS_USE_SPIFLASH)
50         if (dev == ATMEL_SAMA5D2_BOOT_FROM_SPI)
51                 return BOOT_DEVICE_SPI;
52 #endif
53
54         printf("ERROR: SMC/TWI/QSPI boot device not supported!\n"
55                "       Boot device %i, controller number %i\n", dev, off);
56
57         return BOOT_DEVICE_NONE;
58 }
59 #else
60 u32 spl_boot_device(void)
61 {
62 #ifdef CONFIG_SYS_USE_MMC
63         return BOOT_DEVICE_MMC1;
64 #elif CONFIG_SYS_USE_NANDFLASH
65         return BOOT_DEVICE_NAND;
66 #elif CONFIG_SYS_USE_SERIALFLASH || CONFIG_SYS_USE_SPIFLASH
67         return BOOT_DEVICE_SPI;
68 #endif
69         return BOOT_DEVICE_NONE;
70 }
71 #endif
72
73 u32 spl_boot_mode(void)
74 {
75         switch (spl_boot_device()) {
76 #ifdef CONFIG_SYS_USE_MMC
77         case BOOT_DEVICE_MMC1:
78         case BOOT_DEVICE_MMC2:
79                 return MMCSD_MODE_FS;
80                 break;
81 #endif
82         case BOOT_DEVICE_NONE:
83         default:
84                 hang();
85         }
86 }