| David Howells | daeb51e | 2008-02-08 04:19:48 -0800 | [diff] [blame] | 1 | /* Handle mapping of the flash on the ASB2303 board |
| 2 | * |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public Licence |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the Licence, or (at your option) any later version. |
| 10 | */ |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/platform_device.h> |
| 13 | #include <linux/mtd/partitions.h> |
| 14 | #include <linux/mtd/physmap.h> |
| 15 | |
| 16 | #define ASB2303_PROM_ADDR 0xA0000000 /* Boot PROM */ |
| 17 | #define ASB2303_PROM_SIZE (2 * 1024 * 1024) |
| 18 | #define ASB2303_FLASH_ADDR 0xA4000000 /* System Flash */ |
| 19 | #define ASB2303_FLASH_SIZE (32 * 1024 * 1024) |
| 20 | #define ASB2303_CONFIG_ADDR 0xA6000000 /* System Config EEPROM */ |
| 21 | #define ASB2303_CONFIG_SIZE (8 * 1024) |
| 22 | |
| 23 | /* |
| 24 | * default MTD partition table for both main flash devices, expected to be |
| 25 | * overridden by RedBoot |
| 26 | */ |
| 27 | static struct mtd_partition asb2303_partitions[] = { |
| 28 | { |
| 29 | .name = "Bootloader", |
| 30 | .size = 0x00040000, |
| 31 | .offset = 0, |
| 32 | .mask_flags = MTD_CAP_ROM /* force read-only */ |
| 33 | }, { |
| 34 | .name = "Kernel", |
| 35 | .size = 0x00400000, |
| 36 | .offset = 0x00040000, |
| 37 | }, { |
| 38 | .name = "Filesystem", |
| 39 | .size = MTDPART_SIZ_FULL, |
| 40 | .offset = 0x00440000 |
| 41 | } |
| 42 | }; |
| 43 | |
| 44 | /* |
| 45 | * the ASB2303 Boot PROM definition |
| 46 | */ |
| 47 | static struct physmap_flash_data asb2303_bootprom_data = { |
| 48 | .width = 2, |
| 49 | .nr_parts = 1, |
| 50 | .parts = asb2303_partitions, |
| 51 | }; |
| 52 | |
| 53 | static struct resource asb2303_bootprom_resource = { |
| 54 | .start = ASB2303_PROM_ADDR, |
| 55 | .end = ASB2303_PROM_ADDR + ASB2303_PROM_SIZE, |
| 56 | .flags = IORESOURCE_MEM, |
| 57 | }; |
| 58 | |
| 59 | static struct platform_device asb2303_bootprom = { |
| 60 | .name = "physmap-flash", |
| 61 | .id = 0, |
| 62 | .dev.platform_data = &asb2303_bootprom_data, |
| 63 | .num_resources = 1, |
| 64 | .resource = &asb2303_bootprom_resource, |
| 65 | }; |
| 66 | |
| 67 | /* |
| 68 | * the ASB2303 System Flash definition |
| 69 | */ |
| 70 | static struct physmap_flash_data asb2303_sysflash_data = { |
| 71 | .width = 4, |
| 72 | .nr_parts = 1, |
| 73 | .parts = asb2303_partitions, |
| 74 | }; |
| 75 | |
| 76 | static struct resource asb2303_sysflash_resource = { |
| 77 | .start = ASB2303_FLASH_ADDR, |
| 78 | .end = ASB2303_FLASH_ADDR + ASB2303_FLASH_SIZE, |
| 79 | .flags = IORESOURCE_MEM, |
| 80 | }; |
| 81 | |
| 82 | static struct platform_device asb2303_sysflash = { |
| 83 | .name = "physmap-flash", |
| 84 | .id = 1, |
| 85 | .dev.platform_data = &asb2303_sysflash_data, |
| 86 | .num_resources = 1, |
| 87 | .resource = &asb2303_sysflash_resource, |
| 88 | }; |
| 89 | |
| 90 | /* |
| 91 | * register the ASB2303 flashes |
| 92 | */ |
| 93 | static int __init asb2303_mtd_init(void) |
| 94 | { |
| 95 | platform_device_register(&asb2303_bootprom); |
| 96 | platform_device_register(&asb2303_sysflash); |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | module_init(asb2303_mtd_init); |