a16fffdd8e
Merisc is the family name for a range of AVR32-based boards. The boards are designed to be used in a man-machine interfacing environment, utilizing a touch-based graphical user interface. They host a vast range of I/O peripherals as well as a large SDRAM & Flash memory bank. For more information see: http://www.martinsson.se/merisc Signed-off-by: Jonas Larsson <jonas.larsson@martinsson.se> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
139 lines
2.8 KiB
C
139 lines
2.8 KiB
C
/*
|
|
* 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);
|