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/*
* Merisc board-specific flash initialization
*
* Copyright (C) 2008 Martinsson Elektronik AB
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <mach/smc.h>
/* Will be translated to units of 14.3 ns, rounded up */
static struct smc_timing flash_timing __initdata = {
.ncs_read_setup = 1 * 14,
.nrd_setup = 5 * 14,
.ncs_write_setup = 1 * 14,
.nwe_setup = 2 * 14,
.ncs_read_pulse = 12 * 14,
.nrd_pulse = 7 * 14,
.ncs_write_pulse = 8 * 14,
.nwe_pulse = 4 * 14,
.read_cycle = 14 * 14,
.write_cycle = 10 * 14,
};
static struct smc_config flash_config __initdata = {
.bus_width = 2,
.nrd_controlled = 1,
.nwe_controlled = 1,
.byte_write = 1,
.tdf_cycles = 3,
};
static struct mtd_partition flash_0_parts[] = {
{
.name = "boot",
.offset = 0x00000000,
.size = 0x00060000,
.mask_flags = 0,
},
{
.name = "kernel",
.offset = 0x00060000,
.size = 0x00200000,
.mask_flags = 0,
},
{
.name = "root",
.offset = 0x00260000,
.size = MTDPART_SIZ_FULL,
.mask_flags = 0,
},
};
static struct mtd_partition flash_1_parts[] = {
{
.name = "2ndflash",
.offset = 0x00000000,
.size = MTDPART_SIZ_FULL,
.mask_flags = 0,
},
};
static struct physmap_flash_data flash_data[] = {
{
.width = 2,
.nr_parts = ARRAY_SIZE(flash_0_parts),
.parts = flash_0_parts,
},
{
.width = 2,
.nr_parts = ARRAY_SIZE(flash_1_parts),
.parts = flash_1_parts,
}
};
static struct resource flash_resource[] = {
{
.start = 0x00000000,
.end = 0x03ffffff,
.flags = IORESOURCE_MEM,
},
{
.start = 0x04000000,
.end = 0x07ffffff,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device flash_device[] = {
{
.name = "physmap-flash",
.id = 0,
.resource = &flash_resource[0],
.num_resources = 1,
.dev = {
.platform_data = &flash_data[0],
},
},
{
.name = "physmap-flash",
.id = 1,
.resource = &flash_resource[1],
.num_resources = 1,
.dev = {
.platform_data = &flash_data[1],
},
},
};
static int __init merisc_flash_init(void)
{
int ret;
smc_set_timing(&flash_config, &flash_timing);
ret = smc_set_configuration(0, &flash_config);
if (ret < 0) {
printk(KERN_ERR "Merisc: failed to set NOR flash timing #0\n");
return ret;
}
ret = smc_set_configuration(4, &flash_config);
if (ret < 0) {
printk(KERN_ERR "Merisc: failed to set NOR flash timing #1\n");
return ret;
}
platform_device_register(&flash_device[0]);
platform_device_register(&flash_device[1]);
return 0;
}
device_initcall(merisc_flash_init);
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