1/* 2 * MIMC200 board-specific flash initialization 3 * 4 * Copyright (C) 2008 Mercury IMC Ltd 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 = 15, 21 .ncs_write_setup = 0, 22 .nwe_setup = 0, 23 24 .ncs_read_pulse = 115, 25 .nrd_pulse = 110, 26 .ncs_write_pulse = 60, 27 .nwe_pulse = 60, 28 29 .read_cycle = 115, 30 .write_cycle = 100, 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 40/* system flash definition */ 41 42static struct mtd_partition flash_parts_system[] = { 43 { 44 .name = "u-boot", 45 .offset = 0x00000000, 46 .size = 0x00020000, /* 128 KiB */ 47 .mask_flags = MTD_WRITEABLE, 48 }, 49 { 50 .name = "root", 51 .offset = 0x00020000, 52 .size = 0x007c0000, 53 }, 54 { 55 .name = "splash", 56 .offset = 0x007e0000, 57 .size = 0x00010000, /* 64KiB */ 58 }, 59 { 60 .name = "env", 61 .offset = 0x007f0000, 62 .size = 0x00010000, 63 .mask_flags = MTD_WRITEABLE, 64 }, 65}; 66 67static struct physmap_flash_data flash_system = { 68 .width = 2, 69 .nr_parts = ARRAY_SIZE(flash_parts_system), 70 .parts = flash_parts_system, 71}; 72 73static struct resource flash_resource_system = { 74 .start = 0x00000000, 75 .end = 0x007fffff, 76 .flags = IORESOURCE_MEM, 77}; 78 79static struct platform_device flash_device_system = { 80 .name = "physmap-flash", 81 .id = 0, 82 .resource = &flash_resource_system, 83 .num_resources = 1, 84 .dev = { 85 .platform_data = &flash_system, 86 }, 87}; 88 89/* data flash definition */ 90 91static struct mtd_partition flash_parts_data[] = { 92 { 93 .name = "data", 94 .offset = 0x00000000, 95 .size = 0x00800000, 96 }, 97}; 98 99static struct physmap_flash_data flash_data = { 100 .width = 2, 101 .nr_parts = ARRAY_SIZE(flash_parts_data), 102 .parts = flash_parts_data, 103}; 104 105static struct resource flash_resource_data = { 106 .start = 0x08000000, 107 .end = 0x087fffff, 108 .flags = IORESOURCE_MEM, 109}; 110 111static struct platform_device flash_device_data = { 112 .name = "physmap-flash", 113 .id = 1, 114 .resource = &flash_resource_data, 115 .num_resources = 1, 116 .dev = { 117 .platform_data = &flash_data, 118 }, 119}; 120 121/* This needs to be called after the SMC has been initialized */ 122static int __init mimc200_flash_init(void) 123{ 124 int ret; 125 126 smc_set_timing(&flash_config, &flash_timing); 127 ret = smc_set_configuration(0, &flash_config); 128 if (ret < 0) { 129 printk(KERN_ERR "mimc200: failed to set 'System' NOR flash timing\n"); 130 return ret; 131 } 132 ret = smc_set_configuration(1, &flash_config); 133 if (ret < 0) { 134 printk(KERN_ERR "mimc200: failed to set 'Data' NOR flash timing\n"); 135 return ret; 136 } 137 138 platform_device_register(&flash_device_system); 139 platform_device_register(&flash_device_data); 140 141 return 0; 142} 143device_initcall(mimc200_flash_init); 144