1/* 2 * ATSTK1000 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 <asm/arch/smc.h> 17 18static struct smc_config flash_config __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 .bus_width = 2, 33 .nrd_controlled = 1, 34 .nwe_controlled = 1, 35 .byte_write = 1, 36}; 37 38static struct mtd_partition flash_parts[] = { 39 { 40 .name = "u-boot", 41 .offset = 0x00000000, 42 .size = 0x00020000, /* 128 KiB */ 43 .mask_flags = MTD_WRITEABLE, 44 }, 45 { 46 .name = "root", 47 .offset = 0x00020000, 48 .size = 0x007d0000, 49 }, 50 { 51 .name = "env", 52 .offset = 0x007f0000, 53 .size = 0x00010000, 54 .mask_flags = MTD_WRITEABLE, 55 }, 56}; 57 58static struct physmap_flash_data flash_data = { 59 .width = 2, 60 .nr_parts = ARRAY_SIZE(flash_parts), 61 .parts = flash_parts, 62}; 63 64static struct resource flash_resource = { 65 .start = 0x00000000, 66 .end = 0x007fffff, 67 .flags = IORESOURCE_MEM, 68}; 69 70static struct platform_device flash_device = { 71 .name = "physmap-flash", 72 .id = 0, 73 .resource = &flash_resource, 74 .num_resources = 1, 75 .dev = { 76 .platform_data = &flash_data, 77 }, 78}; 79 80/* This needs to be called after the SMC has been initialized */ 81static int __init atstk1000_flash_init(void) 82{ 83 int ret; 84 85 ret = smc_set_configuration(0, &flash_config); 86 if (ret < 0) { 87 printk(KERN_ERR "atstk1000: failed to set NOR flash timing\n"); 88 return ret; 89 } 90 91 platform_device_register(&flash_device); 92 93 return 0; 94} 95device_initcall(atstk1000_flash_init); 96