• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * OMAP4 boot
4  *
5  * Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
6  */
7 
8 #include <common.h>
9 #include <asm/io.h>
10 #include <asm/omap_common.h>
11 #include <asm/arch/sys_proto.h>
12 #include <spl.h>
13 
14 static u32 boot_devices[] = {
15 	BOOT_DEVICE_MMC2,
16 	BOOT_DEVICE_XIP,
17 	BOOT_DEVICE_XIPWAIT,
18 	BOOT_DEVICE_NAND,
19 	BOOT_DEVICE_XIPWAIT,
20 	BOOT_DEVICE_MMC1,
21 	BOOT_DEVICE_ONENAND,
22 	BOOT_DEVICE_ONENAND,
23 	BOOT_DEVICE_MMC2,
24 	BOOT_DEVICE_ONENAND,
25 	BOOT_DEVICE_XIPWAIT,
26 	BOOT_DEVICE_NAND,
27 	BOOT_DEVICE_NAND,
28 	BOOT_DEVICE_MMC1,
29 	BOOT_DEVICE_ONENAND,
30 	BOOT_DEVICE_MMC2,
31 	BOOT_DEVICE_XIP,
32 	BOOT_DEVICE_XIPWAIT,
33 	BOOT_DEVICE_NAND,
34 	BOOT_DEVICE_MMC1,
35 	BOOT_DEVICE_MMC1,
36 	BOOT_DEVICE_ONENAND,
37 	BOOT_DEVICE_MMC2,
38 	BOOT_DEVICE_XIP,
39 	BOOT_DEVICE_MMC2_2,
40 	BOOT_DEVICE_NAND,
41 	BOOT_DEVICE_MMC2_2,
42 	BOOT_DEVICE_MMC1,
43 	BOOT_DEVICE_MMC2_2,
44 	BOOT_DEVICE_MMC2_2,
45 	BOOT_DEVICE_NONE,
46 	BOOT_DEVICE_XIPWAIT,
47 };
48 
omap_sys_boot_device(void)49 u32 omap_sys_boot_device(void)
50 {
51 	u32 sys_boot;
52 
53 	/* Grab the first 5 bits of the status register for SYS_BOOT. */
54 	sys_boot = readl((u32 *) (*ctrl)->control_status) & ((1 << 5) - 1);
55 
56 	if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
57 		return BOOT_DEVICE_NONE;
58 
59 	return boot_devices[sys_boot];
60 }
61 
omap_reboot_mode(char * mode,unsigned int length)62 int omap_reboot_mode(char *mode, unsigned int length)
63 {
64 	unsigned int limit;
65 	unsigned int i;
66 
67 	if (length < 2)
68 		return -1;
69 
70 	if (!warm_reset())
71 		return -1;
72 
73 	limit = (length < OMAP_REBOOT_REASON_SIZE) ? length :
74 		OMAP_REBOOT_REASON_SIZE;
75 
76 	for (i = 0; i < (limit - 1); i++)
77 		mode[i] = readb((u8 *)(OMAP44XX_SAR_RAM_BASE +
78 			OMAP_REBOOT_REASON_OFFSET + i));
79 
80 	mode[i] = '\0';
81 
82 	return 0;
83 }
84 
omap_reboot_mode_clear(void)85 int omap_reboot_mode_clear(void)
86 {
87 	writeb(0, (u8 *)(OMAP44XX_SAR_RAM_BASE + OMAP_REBOOT_REASON_OFFSET));
88 
89 	return 0;
90 }
91 
omap_reboot_mode_store(char * mode)92 int omap_reboot_mode_store(char *mode)
93 {
94 	unsigned int i;
95 
96 	for (i = 0; i < (OMAP_REBOOT_REASON_SIZE - 1) && mode[i] != '\0'; i++)
97 		writeb(mode[i], (u8 *)(OMAP44XX_SAR_RAM_BASE +
98 			OMAP_REBOOT_REASON_OFFSET + i));
99 
100 	writeb('\0', (u8 *)(OMAP44XX_SAR_RAM_BASE +
101 		OMAP_REBOOT_REASON_OFFSET + i));
102 
103 	return 0;
104 }
105