text: /*
   * OMAP3 boot
   *
   * Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include <common.h>
  #include <asm/io.h>
  #include <asm/arch/sys_proto.h>
  #include <spl.h>
  
  static u32 boot_devices[] = {
  	BOOT_DEVICE_ONENAND,
  	BOOT_DEVICE_NAND,
  	BOOT_DEVICE_ONENAND,
  	BOOT_DEVICE_MMC2,
  	BOOT_DEVICE_ONENAND,
  	BOOT_DEVICE_MMC2,
  	BOOT_DEVICE_MMC1,
  	BOOT_DEVICE_XIP,
  	BOOT_DEVICE_XIPWAIT,
  	BOOT_DEVICE_MMC2,
  	BOOT_DEVICE_XIP,
  	BOOT_DEVICE_XIPWAIT,
  	BOOT_DEVICE_NAND,
  	BOOT_DEVICE_XIP,
  	BOOT_DEVICE_XIPWAIT,
  	BOOT_DEVICE_NAND,
  	BOOT_DEVICE_ONENAND,
  	BOOT_DEVICE_MMC2,
  	BOOT_DEVICE_MMC1,
  	BOOT_DEVICE_XIP,
  	BOOT_DEVICE_XIPWAIT,
  	BOOT_DEVICE_NAND,
  	BOOT_DEVICE_ONENAND,
  	BOOT_DEVICE_MMC2,
  	BOOT_DEVICE_MMC1,
  	BOOT_DEVICE_XIP,
  	BOOT_DEVICE_XIPWAIT,
  	BOOT_DEVICE_NAND,
  	BOOT_DEVICE_MMC2_2,
  };
  
  u32 omap_sys_boot_device(void)
  {
  	struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
  	u32 sys_boot;
  
  	/* Grab the first 5 bits of the status register for SYS_BOOT. */
  	sys_boot = readl(&ctrl_base->status) & ((1 << 5) - 1);
  
  	if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
  		return BOOT_DEVICE_NONE;
  
  	return boot_devices[sys_boot];
  }
  
  char omap_reboot_mode(void)
  {
  	u32 reboot_mode;
  	char c;
  
  	reboot_mode = readl((u32 *)(OMAP34XX_SCRATCHPAD + 4));
  
  	c = (reboot_mode >> 24) & 0xff;
  	if (c != 'B')
  		return -1;
  
  	c = (reboot_mode >> 16) & 0xff;
  	if (c != 'M')
  		return -1;
  
  	c = reboot_mode & 0xff;
  
  	return c;
  }
  
  int omap_reboot_mode_clear(void)
  {
  	writel(0, (u32 *)(OMAP34XX_SCRATCHPAD + 4));
  
  	return 0;
  }
  
  int omap_reboot_mode_store(char c)
  {
  	u32 reboot_mode;
  
  	reboot_mode = 'B' << 24 | 'M' << 16 | c;
  
  	writel(reboot_mode, (u32 *)(OMAP34XX_SCRATCHPAD + 4));
  
  	return 0;
  }
  