LXR uboot/arch/arm/mach-omap2/omap3/boot.c

   1/*
   2 * OMAP3 boot
   3 *
   4 * Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
   5 *
   6 * SPDX-License-Identifier:     GPL-2.0+
   7 */
   8
   9#include <common.h>
  10#include <asm/io.h>
  11#include <asm/arch/sys_proto.h>
  12#include <spl.h>
  13
  14static u32 boot_devices[] = {
  15        BOOT_DEVICE_ONENAND,
  16        BOOT_DEVICE_NAND,
  17        BOOT_DEVICE_ONENAND,
  18        BOOT_DEVICE_MMC2,
  19        BOOT_DEVICE_ONENAND,
  20        BOOT_DEVICE_MMC2,
  21        BOOT_DEVICE_MMC1,
  22        BOOT_DEVICE_XIP,
  23        BOOT_DEVICE_XIPWAIT,
  24        BOOT_DEVICE_MMC2,
  25        BOOT_DEVICE_XIP,
  26        BOOT_DEVICE_XIPWAIT,
  27        BOOT_DEVICE_NAND,
  28        BOOT_DEVICE_XIP,
  29        BOOT_DEVICE_XIPWAIT,
  30        BOOT_DEVICE_NAND,
  31        BOOT_DEVICE_ONENAND,
  32        BOOT_DEVICE_MMC2,
  33        BOOT_DEVICE_MMC1,
  34        BOOT_DEVICE_XIP,
  35        BOOT_DEVICE_XIPWAIT,
  36        BOOT_DEVICE_NAND,
  37        BOOT_DEVICE_ONENAND,
  38        BOOT_DEVICE_MMC2,
  39        BOOT_DEVICE_MMC1,
  40        BOOT_DEVICE_XIP,
  41        BOOT_DEVICE_XIPWAIT,
  42        BOOT_DEVICE_NAND,
  43        BOOT_DEVICE_MMC2_2,
  44};
  45
  46u32 omap_sys_boot_device(void)
  47{
  48        struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
  49        u32 sys_boot;
  50
  51        /* Grab the first 5 bits of the status register for SYS_BOOT. */
  52        sys_boot = readl(&ctrl_base->status) & ((1 << 5) - 1);
  53
  54        if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
  55                return BOOT_DEVICE_NONE;
  56
  57        return boot_devices[sys_boot];
  58}
  59
  60int omap_reboot_mode(char *mode, unsigned int length)
  61{
  62        u32 reboot_mode;
  63        char c;
  64
  65        if (length < 2)
  66                return -1;
  67
  68        reboot_mode = readl((u32 *)(OMAP34XX_SCRATCHPAD +
  69                OMAP_REBOOT_REASON_OFFSET));
  70
  71        c = (reboot_mode >> 24) & 0xff;
  72        if (c != 'B')
  73                return -1;
  74
  75        c = (reboot_mode >> 16) & 0xff;
  76        if (c != 'M')
  77                return -1;
  78
  79        c = reboot_mode & 0xff;
  80
  81        mode[0] = c;
  82        mode[1] = '\0';
  83
  84        return 0;
  85}
  86
  87int omap_reboot_mode_clear(void)
  88{
  89        writel(0, (u32 *)(OMAP34XX_SCRATCHPAD + OMAP_REBOOT_REASON_OFFSET));
  90
  91        return 0;
  92}
  93
  94int omap_reboot_mode_store(char *mode)
  95{
  96        u32 reboot_mode;
  97
  98        reboot_mode = 'B' << 24 | 'M' << 16 | mode[0];
  99
 100        writel(reboot_mode, (u32 *)(OMAP34XX_SCRATCHPAD +
 101                OMAP_REBOOT_REASON_OFFSET));
 102
 103        return 0;
 104}
 105