| Haavard Skinnemoen | 2514183 | 2006-09-25 23:32:17 -0700 | [diff] [blame] | 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 | |
| 18 | static 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 | |
| 38 | static 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 | |
| 58 | static struct physmap_flash_data flash_data = { |
| 59 | .width = 2, |
| 60 | .nr_parts = ARRAY_SIZE(flash_parts), |
| 61 | .parts = flash_parts, |
| 62 | }; |
| 63 | |
| 64 | static struct resource flash_resource = { |
| 65 | .start = 0x00000000, |
| 66 | .end = 0x007fffff, |
| 67 | .flags = IORESOURCE_MEM, |
| 68 | }; |
| 69 | |
| 70 | static 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 */ |
| 81 | static 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 | } |
| 95 | device_initcall(atstk1000_flash_init); |