1 /* 2 * Copyright � 2001 Flaga hf. Medical Devices, K�ri Dav��sson <kd@flaga.is> 3 * 4 * $Id: cfi_flagadm.c,v 1.15 2005/11/07 11:14:26 gleixner Exp $ 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 * 11 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 12 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 14 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 17 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 18 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 21 * 22 * You should have received a copy of the GNU General Public License along 23 * with this program; if not, write to the Free Software Foundation, Inc., 24 * 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27 #include <linux/module.h> 28 #include <linux/types.h> 29 #include <linux/kernel.h> 30 #include <linux/init.h> 31 #include <asm/io.h> 32 #include <linux/mtd/mtd.h> 33 #include <linux/mtd/map.h> 34 #include <linux/mtd/partitions.h> 35 36 37 /* We split the flash chip up into four parts. 38 * 1: bootloader firts 128k (0x00000000 - 0x0001FFFF) size 0x020000 39 * 2: kernel 640k (0x00020000 - 0x000BFFFF) size 0x0A0000 40 * 3: compressed 1536k root ramdisk (0x000C0000 - 0x0023FFFF) size 0x180000 41 * 4: writeable diskpartition (jffs)(0x00240000 - 0x003FFFFF) size 0x1C0000 42 */ 43 44 #define FLASH_PHYS_ADDR 0x40000000 45 #define FLASH_SIZE 0x400000 46 47 #define FLASH_PARTITION0_ADDR 0x00000000 48 #define FLASH_PARTITION0_SIZE 0x00020000 49 50 #define FLASH_PARTITION1_ADDR 0x00020000 51 #define FLASH_PARTITION1_SIZE 0x000A0000 52 53 #define FLASH_PARTITION2_ADDR 0x000C0000 54 #define FLASH_PARTITION2_SIZE 0x00180000 55 56 #define FLASH_PARTITION3_ADDR 0x00240000 57 #define FLASH_PARTITION3_SIZE 0x001C0000 58 59 60 struct map_info flagadm_map = { 61 .name = "FlagaDM flash device", 62 .size = FLASH_SIZE, 63 .bankwidth = 2, 64 }; 65 66 struct mtd_partition flagadm_parts[] = { 67 { 68 .name = "Bootloader", 69 .offset = FLASH_PARTITION0_ADDR, 70 .size = FLASH_PARTITION0_SIZE 71 }, 72 { 73 .name = "Kernel image", 74 .offset = FLASH_PARTITION1_ADDR, 75 .size = FLASH_PARTITION1_SIZE 76 }, 77 { 78 .name = "Initial ramdisk image", 79 .offset = FLASH_PARTITION2_ADDR, 80 .size = FLASH_PARTITION2_SIZE 81 }, 82 { 83 .name = "Persistant storage", 84 .offset = FLASH_PARTITION3_ADDR, 85 .size = FLASH_PARTITION3_SIZE 86 } 87 }; 88 89 #define PARTITION_COUNT (sizeof(flagadm_parts)/sizeof(struct mtd_partition)) 90 91 static struct mtd_info *mymtd; 92 93 int __init init_flagadm(void) 94 { 95 printk(KERN_NOTICE "FlagaDM flash device: %x at %x\n", 96 FLASH_SIZE, FLASH_PHYS_ADDR); 97 98 flagadm_map.phys = FLASH_PHYS_ADDR; 99 flagadm_map.virt = ioremap(FLASH_PHYS_ADDR, 100 FLASH_SIZE); 101 102 if (!flagadm_map.virt) { 103 printk("Failed to ioremap\n"); 104 return -EIO; 105 } 106 107 simple_map_init(&flagadm_map); 108 109 mymtd = do_map_probe("cfi_probe", &flagadm_map); 110 if (mymtd) { 111 mymtd->owner = THIS_MODULE; 112 add_mtd_partitions(mymtd, flagadm_parts, PARTITION_COUNT); 113 printk(KERN_NOTICE "FlagaDM flash device initialized\n"); 114 return 0; 115 } 116 117 iounmap((void *)flagadm_map.virt); 118 return -ENXIO; 119 } 120 121 static void __exit cleanup_flagadm(void) 122 { 123 if (mymtd) { 124 del_mtd_partitions(mymtd); 125 map_destroy(mymtd); 126 } 127 if (flagadm_map.virt) { 128 iounmap((void *)flagadm_map.virt); 129 flagadm_map.virt = 0; 130 } 131 } 132 133 module_init(init_flagadm); 134 module_exit(cleanup_flagadm); 135 136 137 MODULE_LICENSE("GPL"); 138 MODULE_AUTHOR("K�ri Dav��sson <kd@flaga.is>"); 139 MODULE_DESCRIPTION("MTD map driver for Flaga digital module"); 140