Pileus Git - ~andy/linux/blob - arch/mips/bcm63xx/dev-flash.c

   1 /*
   2  * Broadcom BCM63xx flash registration
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
   9  * Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/kernel.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/mtd/mtd.h>
  16 #include <linux/mtd/partitions.h>
  17 #include <linux/mtd/physmap.h>
  18
  19 #include <bcm63xx_cpu.h>
  20 #include <bcm63xx_dev_flash.h>
  21 #include <bcm63xx_regs.h>
  22 #include <bcm63xx_io.h>
  23
  24 static struct mtd_partition mtd_partitions[] = {
  25         {
  26                 .name           = "cfe",
  27                 .offset         = 0x0,
  28                 .size           = 0x40000,
  29         }
  30 };
  31
  32 static const char *bcm63xx_part_types[] = { "bcm63xxpart", NULL };
  33
  34 static struct physmap_flash_data flash_data = {
  35         .width                  = 2,
  36         .parts                  = mtd_partitions,
  37         .part_probe_types       = bcm63xx_part_types,
  38 };
  39
  40 static struct resource mtd_resources[] = {
  41         {
  42                 .start          = 0,    /* filled at runtime */
  43                 .end            = 0,    /* filled at runtime */
  44                 .flags          = IORESOURCE_MEM,
  45         }
  46 };
  47
  48 static struct platform_device mtd_dev = {
  49         .name                   = "physmap-flash",
  50         .resource               = mtd_resources,
  51         .num_resources          = ARRAY_SIZE(mtd_resources),
  52         .dev                    = {
  53                 .platform_data  = &flash_data,
  54         },
  55 };
  56
  57 int __init bcm63xx_flash_register(void)
  58 {
  59         u32 val;
  60
  61         /* read base address of boot chip select (0) */
  62         val = bcm_mpi_readl(MPI_CSBASE_REG(0));
  63         val &= MPI_CSBASE_BASE_MASK;
  64
  65         mtd_resources[0].start = val;
  66         mtd_resources[0].end = 0x1FFFFFFF;
  67
  68         return platform_device_register(&mtd_dev);
  69 }