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