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Viewing changes to arch/mips/cavium-octeon/flash_setup.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/mips/cavium-octeon/flash_setup.c
 
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/*
 
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 *   Octeon Bootbus flash setup
 
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 *
 
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 * This file is subject to the terms and conditions of the GNU General Public
 
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 * License.  See the file "COPYING" in the main directory of this archive
 
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 * for more details.
 
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 *
 
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 * Copyright (C) 2007, 2008 Cavium Networks
 
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 */
 
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#include <linux/kernel.h>
 
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#include <linux/export.h>
 
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#include <linux/mtd/mtd.h>
 
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#include <linux/mtd/map.h>
 
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#include <linux/mtd/partitions.h>
 
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#include <asm/octeon/octeon.h>
 
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static struct map_info flash_map;
 
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static struct mtd_info *mymtd;
 
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static const char *part_probe_types[] = {
 
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        "cmdlinepart",
 
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#ifdef CONFIG_MTD_REDBOOT_PARTS
 
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        "RedBoot",
 
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#endif
 
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        NULL
 
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};
 
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/**
 
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 * Module/ driver initialization.
 
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 *
 
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 * Returns Zero on success
 
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 */
 
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static int __init flash_init(void)
 
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{
 
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        /*
 
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         * Read the bootbus region 0 setup to determine the base
 
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         * address of the flash.
 
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         */
 
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        union cvmx_mio_boot_reg_cfgx region_cfg;
 
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        region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(0));
 
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        if (region_cfg.s.en) {
 
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                /*
 
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                 * The bootloader always takes the flash and sets its
 
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                 * address so the entire flash fits below
 
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                 * 0x1fc00000. This way the flash aliases to
 
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                 * 0x1fc00000 for booting. Software can access the
 
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                 * full flash at the true address, while core boot can
 
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                 * access 4MB.
 
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                 */
 
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                /* Use this name so old part lines work */
 
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                flash_map.name = "phys_mapped_flash";
 
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                flash_map.phys = region_cfg.s.base << 16;
 
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                flash_map.size = 0x1fc00000 - flash_map.phys;
 
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                flash_map.bankwidth = 1;
 
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                flash_map.virt = ioremap(flash_map.phys, flash_map.size);
 
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                pr_notice("Bootbus flash: Setting flash for %luMB flash at "
 
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                          "0x%08llx\n", flash_map.size >> 20, flash_map.phys);
 
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                simple_map_init(&flash_map);
 
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                mymtd = do_map_probe("cfi_probe", &flash_map);
 
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                if (mymtd) {
 
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                        mymtd->owner = THIS_MODULE;
 
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                        mtd_device_parse_register(mymtd, part_probe_types,
 
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                                                  0, NULL, 0);
 
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                } else {
 
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                        pr_err("Failed to register MTD device for flash\n");
 
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                }
 
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        }
 
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        return 0;
 
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}
 
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late_initcall(flash_init);