144 строки
3.1 KiB
C
144 строки
3.1 KiB
C
/*
|
|
* MIMC200 board-specific flash initialization
|
|
*
|
|
* Copyright (C) 2008 Mercury IMC Ltd
|
|
*
|
|
* 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>
|
|
|
|
static struct smc_timing flash_timing __initdata = {
|
|
.ncs_read_setup = 0,
|
|
.nrd_setup = 15,
|
|
.ncs_write_setup = 0,
|
|
.nwe_setup = 0,
|
|
|
|
.ncs_read_pulse = 115,
|
|
.nrd_pulse = 110,
|
|
.ncs_write_pulse = 60,
|
|
.nwe_pulse = 60,
|
|
|
|
.read_cycle = 115,
|
|
.write_cycle = 100,
|
|
};
|
|
|
|
static struct smc_config flash_config __initdata = {
|
|
.bus_width = 2,
|
|
.nrd_controlled = 1,
|
|
.nwe_controlled = 1,
|
|
.byte_write = 1,
|
|
};
|
|
|
|
/* system flash definition */
|
|
|
|
static struct mtd_partition flash_parts_system[] = {
|
|
{
|
|
.name = "u-boot",
|
|
.offset = 0x00000000,
|
|
.size = 0x00020000, /* 128 KiB */
|
|
.mask_flags = MTD_WRITEABLE,
|
|
},
|
|
{
|
|
.name = "root",
|
|
.offset = 0x00020000,
|
|
.size = 0x007c0000,
|
|
},
|
|
{
|
|
.name = "splash",
|
|
.offset = 0x007e0000,
|
|
.size = 0x00010000, /* 64KiB */
|
|
},
|
|
{
|
|
.name = "env",
|
|
.offset = 0x007f0000,
|
|
.size = 0x00010000,
|
|
.mask_flags = MTD_WRITEABLE,
|
|
},
|
|
};
|
|
|
|
static struct physmap_flash_data flash_system = {
|
|
.width = 2,
|
|
.nr_parts = ARRAY_SIZE(flash_parts_system),
|
|
.parts = flash_parts_system,
|
|
};
|
|
|
|
static struct resource flash_resource_system = {
|
|
.start = 0x00000000,
|
|
.end = 0x007fffff,
|
|
.flags = IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct platform_device flash_device_system = {
|
|
.name = "physmap-flash",
|
|
.id = 0,
|
|
.resource = &flash_resource_system,
|
|
.num_resources = 1,
|
|
.dev = {
|
|
.platform_data = &flash_system,
|
|
},
|
|
};
|
|
|
|
/* data flash definition */
|
|
|
|
static struct mtd_partition flash_parts_data[] = {
|
|
{
|
|
.name = "data",
|
|
.offset = 0x00000000,
|
|
.size = 0x00800000,
|
|
},
|
|
};
|
|
|
|
static struct physmap_flash_data flash_data = {
|
|
.width = 2,
|
|
.nr_parts = ARRAY_SIZE(flash_parts_data),
|
|
.parts = flash_parts_data,
|
|
};
|
|
|
|
static struct resource flash_resource_data = {
|
|
.start = 0x08000000,
|
|
.end = 0x087fffff,
|
|
.flags = IORESOURCE_MEM,
|
|
};
|
|
|
|
static struct platform_device flash_device_data = {
|
|
.name = "physmap-flash",
|
|
.id = 1,
|
|
.resource = &flash_resource_data,
|
|
.num_resources = 1,
|
|
.dev = {
|
|
.platform_data = &flash_data,
|
|
},
|
|
};
|
|
|
|
/* This needs to be called after the SMC has been initialized */
|
|
static int __init mimc200_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 "mimc200: failed to set 'System' NOR flash timing\n");
|
|
return ret;
|
|
}
|
|
ret = smc_set_configuration(1, &flash_config);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR "mimc200: failed to set 'Data' NOR flash timing\n");
|
|
return ret;
|
|
}
|
|
|
|
platform_device_register(&flash_device_system);
|
|
platform_device_register(&flash_device_data);
|
|
|
|
return 0;
|
|
}
|
|
device_initcall(mimc200_flash_init);
|