/*
   *   Octeon Bootbus flash setup
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   *
   * Copyright (C) 2007, 2008 Cavium Networks
   */
  #include <linux/kernel.h>

  #include <linux/export.h>

  #include <linux/mtd/mtd.h>
  #include <linux/mtd/map.h>
  #include <linux/mtd/partitions.h>
  
  #include <asm/octeon/octeon.h>
  
  static struct map_info flash_map;
  static struct mtd_info *mymtd;

  static const char *part_probe_types[] = {
  	"cmdlinepart",
  #ifdef CONFIG_MTD_REDBOOT_PARTS
  	"RedBoot",
  #endif
  	NULL
  };

  
  /**
   * Module/ driver initialization.
   *
   * Returns Zero on success
   */
  static int __init flash_init(void)
  {
  	/*
  	 * Read the bootbus region 0 setup to determine the base
  	 * address of the flash.
  	 */
  	union cvmx_mio_boot_reg_cfgx region_cfg;
  	region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(0));
  	if (region_cfg.s.en) {
  		/*
  		 * The bootloader always takes the flash and sets its
  		 * address so the entire flash fits below
  		 * 0x1fc00000. This way the flash aliases to
  		 * 0x1fc00000 for booting. Software can access the
  		 * full flash at the true address, while core boot can
  		 * access 4MB.
  		 */
  		/* Use this name so old part lines work */
  		flash_map.name = "phys_mapped_flash";
  		flash_map.phys = region_cfg.s.base << 16;
  		flash_map.size = 0x1fc00000 - flash_map.phys;
  		flash_map.bankwidth = 1;
  		flash_map.virt = ioremap(flash_map.phys, flash_map.size);
  		pr_notice("Bootbus flash: Setting flash for %luMB flash at "

  			  "0x%08llx
  ", flash_map.size >> 20, flash_map.phys);

  		simple_map_init(&flash_map);
  		mymtd = do_map_probe("cfi_probe", &flash_map);
  		if (mymtd) {
  			mymtd->owner = THIS_MODULE;

  			mtd_device_parse_register(mymtd, part_probe_types,
  						  0, NULL, 0);

  		} else {
  			pr_err("Failed to register MTD device for flash
  ");
  		}
  	}
  	return 0;
  }
  
  late_initcall(flash_init);