1/* 2 * Favr-32 board-specific flash initialization 3 * 4 * Copyright (C) 2008 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 <mach/smc.h> 17 18static struct smc_timing flash_timing __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 33static struct smc_config flash_config __initdata = { 34 .bus_width = 2, 35 .nrd_controlled = 1, 36 .nwe_controlled = 1, 37 .byte_write = 1, 38}; 39 40static struct mtd_partition flash_parts[] = { 41 { 42 .name = "u-boot", 43 .offset = 0x00000000, 44 .size = 0x00020000, /* 128 KiB */ 45 .mask_flags = MTD_WRITEABLE, 46 }, 47 { 48 .name = "root", 49 .offset = 0x00020000, 50 .size = 0x007d0000, 51 }, 52 { 53 .name = "env", 54 .offset = 0x007f0000, 55 .size = 0x00010000, 56 .mask_flags = MTD_WRITEABLE, 57 }, 58}; 59 60static struct physmap_flash_data flash_data = { 61 .width = 2, 62 .nr_parts = ARRAY_SIZE(flash_parts), 63 .parts = flash_parts, 64}; 65 66static struct resource flash_resource = { 67 .start = 0x00000000, 68 .end = 0x007fffff, 69 .flags = IORESOURCE_MEM, 70}; 71 72static struct platform_device flash_device = { 73 .name = "physmap-flash", 74 .id = 0, 75 .resource = &flash_resource, 76 .num_resources = 1, 77 .dev = { 78 .platform_data = &flash_data, 79 }, 80}; 81 82/* This needs to be called after the SMC has been initialized */ 83static int __init favr32_flash_init(void) 84{ 85 int ret; 86 87 smc_set_timing(&flash_config, &flash_timing); 88 ret = smc_set_configuration(0, &flash_config); 89 if (ret < 0) { 90 printk(KERN_ERR "Favr-32: failed to set NOR flash timing\n"); 91 return ret; 92 } 93 94 platform_device_register(&flash_device); 95 96 return 0; 97} 98device_initcall(favr32_flash_init); 99