LXR linux/arch/avr32/boards/atngw100/flash.c

   1/*
   2 * ATNGW100 board-specific flash initialization
   3 *
   4 * Copyright (C) 2005-2006 Atmel Corporation
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10#include <linux/init.h>
  11#include <linux/platform_device.h>
  12#include <linux/mtd/mtd.h>
  13#include <linux/mtd/partitions.h>
  14#include <linux/mtd/physmap.h>
  15
  16#include <mach/smc.h>
  17
  18static struct smc_timing flash_timing __initdata = {
  19        .ncs_read_setup         = 0,
  20        .nrd_setup              = 40,
  21        .ncs_write_setup        = 0,
  22        .nwe_setup              = 10,
  23
  24        .ncs_read_pulse         = 80,
  25        .nrd_pulse              = 40,
  26        .ncs_write_pulse        = 65,
  27        .nwe_pulse              = 55,
  28
  29        .read_cycle             = 120,
  30        .write_cycle            = 120,
  31};
  32
  33static struct smc_config flash_config __initdata = {
  34        .bus_width              = 2,
  35        .nrd_controlled         = 1,
  36        .nwe_controlled         = 1,
  37        .byte_write             = 1,
  38};
  39
  40static struct mtd_partition flash_parts[] = {
  41        {
  42                .name           = "u-boot",
  43                .offset         = 0x00000000,
  44                .size           = 0x00020000,           /* 128 KiB */
  45                .mask_flags     = MTD_WRITEABLE,
  46        },
  47        {
  48                .name           = "root",
  49                .offset         = 0x00020000,
  50                .size           = 0x007d0000,
  51        },
  52        {
  53                .name           = "env",
  54                .offset         = 0x007f0000,
  55                .size           = 0x00010000,
  56                .mask_flags     = MTD_WRITEABLE,
  57        },
  58};
  59
  60static struct physmap_flash_data flash_data = {
  61        .width          = 2,
  62        .nr_parts       = ARRAY_SIZE(flash_parts),
  63        .parts          = flash_parts,
  64};
  65
  66static struct resource flash_resource = {
  67        .start          = 0x00000000,
  68        .end            = 0x007fffff,
  69        .flags          = IORESOURCE_MEM,
  70};
  71
  72static struct platform_device flash_device = {
  73        .name           = "physmap-flash",
  74        .id             = 0,
  75        .resource       = &flash_resource,
  76        .num_resources  = 1,
  77        .dev            = {
  78                .platform_data = &flash_data,
  79        },
  80};
  81
  82/* This needs to be called after the SMC has been initialized */
  83static int __init atngw100_flash_init(void)
  84{
  85        int ret;
  86
  87        smc_set_timing(&flash_config, &flash_timing);
  88        ret = smc_set_configuration(0, &flash_config);
  89        if (ret < 0) {
  90                printk(KERN_ERR "atngw100: failed to set NOR flash timing\n");
  91                return ret;
  92        }
  93
  94        platform_device_register(&flash_device);
  95
  96        return 0;
  97}
  98device_initcall(atngw100_flash_init);
  99