drivers/mtd/maps/alchemy-flash.c

   1 /*
   2  * Flash memory access on AMD Alchemy evaluation boards
   3  *
   4  * (C) 2003, 2004 Pete Popov <ppopov@embeddedalley.com>
   5  */
   6
   7 #include <linux/init.h>
   8 #include <linux/module.h>
   9 #include <linux/types.h>
  10 #include <linux/kernel.h>
  11
  12 #include <linux/mtd/mtd.h>
  13 #include <linux/mtd/map.h>
  14 #include <linux/mtd/partitions.h>
  15
  16 #include <asm/io.h>
  17
  18 #ifdef CONFIG_MIPS_PB1000
  19 #define BOARD_MAP_NAME "Pb1000 Flash"
  20 #define BOARD_FLASH_SIZE 0x00800000 /* 8MB */
  21 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  22 #endif
  23
  24 #ifdef CONFIG_MIPS_PB1500
  25 #define BOARD_MAP_NAME "Pb1500 Flash"
  26 #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
  27 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  28 #endif
  29
  30 #ifdef CONFIG_MIPS_PB1100
  31 #define BOARD_MAP_NAME "Pb1100 Flash"
  32 #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
  33 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  34 #endif
  35
  36 #ifdef CONFIG_MIPS_PB1550
  37 #define BOARD_MAP_NAME "Pb1550 Flash"
  38 #define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
  39 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  40 #endif
  41
  42 #ifdef CONFIG_MIPS_PB1200
  43 #define BOARD_MAP_NAME "Pb1200 Flash"
  44 #define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
  45 #define BOARD_FLASH_WIDTH 2 /* 16-bits */
  46 #endif
  47
  48 #ifdef CONFIG_MIPS_DB1000
  49 #define BOARD_MAP_NAME "Db1000 Flash"
  50 #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
  51 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  52 #endif
  53
  54 #ifdef CONFIG_MIPS_DB1500
  55 #define BOARD_MAP_NAME "Db1500 Flash"
  56 #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
  57 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  58 #endif
  59
  60 #ifdef CONFIG_MIPS_DB1100
  61 #define BOARD_MAP_NAME "Db1100 Flash"
  62 #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
  63 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  64 #endif
  65
  66 #ifdef CONFIG_MIPS_DB1550
  67 #define BOARD_MAP_NAME "Db1550 Flash"
  68 #define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
  69 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  70 #endif
  71
  72 #ifdef CONFIG_MIPS_DB1200
  73 #define BOARD_MAP_NAME "Db1200 Flash"
  74 #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
  75 #define BOARD_FLASH_WIDTH 2 /* 16-bits */
  76 #endif
  77
  78 #ifdef CONFIG_MIPS_HYDROGEN3
  79 #define BOARD_MAP_NAME "Hydrogen3 Flash"
  80 #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
  81 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  82 #define USE_LOCAL_ACCESSORS /* why? */
  83 #endif
  84
  85 #ifdef CONFIG_MIPS_BOSPORUS
  86 #define BOARD_MAP_NAME "Bosporus Flash"
  87 #define BOARD_FLASH_SIZE 0x01000000 /* 16MB */
  88 #define BOARD_FLASH_WIDTH 2 /* 16-bits */
  89 #endif
  90
  91 #ifdef CONFIG_MIPS_MIRAGE
  92 #define BOARD_MAP_NAME "Mirage Flash"
  93 #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
  94 #define BOARD_FLASH_WIDTH 4 /* 32-bits */
  95 #define USE_LOCAL_ACCESSORS /* why? */
  96 #endif
  97
  98 static struct map_info alchemy_map = {
  99         .name = BOARD_MAP_NAME,
 100 };
 101
 102 static struct mtd_partition alchemy_partitions[] = {
 103         {
 104                 .name = "User FS",
 105                 .size = BOARD_FLASH_SIZE - 0x00400000,
 106                 .offset = 0x0000000
 107         },{
 108                 .name = "YAMON",
 109                 .size = 0x0100000,
 110                 .offset = MTDPART_OFS_APPEND,
 111                 .mask_flags = MTD_WRITEABLE
 112         },{
 113                 .name = "raw kernel",
 114                 .size = (0x300000 - 0x40000), /* last 256KB is yamon env */
 115                 .offset = MTDPART_OFS_APPEND,
 116         }
 117 };
 118
 119 static struct mtd_info *mymtd;
 120
 121 int __init alchemy_mtd_init(void)
 122 {
 123         struct mtd_partition *parts;
 124         int nb_parts = 0;
 125         unsigned long window_addr;
 126         unsigned long window_size;
 127
 128         /* Default flash buswidth */
 129         alchemy_map.bankwidth = BOARD_FLASH_WIDTH;
 130
 131         window_addr = 0x20000000 - BOARD_FLASH_SIZE;
 132         window_size = BOARD_FLASH_SIZE;
 133 #ifdef CONFIG_MIPS_MIRAGE_WHY
 134         /* Boot ROM flash bank only; no user bank */
 135         window_addr = 0x1C000000;
 136         window_size = 0x04000000;
 137         /* USERFS from 0x1C00 0000 to 0x1FC00000 */
 138         alchemy_partitions[0].size = 0x03C00000;
 139 #endif
 140
 141         /*
 142          * Static partition definition selection
 143          */
 144         parts = alchemy_partitions;
 145         nb_parts = ARRAY_SIZE(alchemy_partitions);
 146         alchemy_map.size = window_size;
 147
 148         /*
 149          * Now let's probe for the actual flash.  Do it here since
 150          * specific machine settings might have been set above.
 151          */
 152         printk(KERN_NOTICE BOARD_MAP_NAME ": probing %d-bit flash bus\n",
 153                         alchemy_map.bankwidth*8);
 154         alchemy_map.virt = ioremap(window_addr, window_size);
 155         mymtd = do_map_probe("cfi_probe", &alchemy_map);
 156         if (!mymtd) {
 157                 iounmap(alchemy_map.virt);
 158                 return -ENXIO;
 159         }
 160         mymtd->owner = THIS_MODULE;
 161
 162         add_mtd_partitions(mymtd, parts, nb_parts);
 163         return 0;
 164 }
 165
 166 static void __exit alchemy_mtd_cleanup(void)
 167 {
 168         if (mymtd) {
 169                 del_mtd_partitions(mymtd);
 170                 map_destroy(mymtd);
 171                 iounmap(alchemy_map.virt);
 172         }
 173 }
 174
 175 module_init(alchemy_mtd_init);
 176 module_exit(alchemy_mtd_cleanup);
 177
 178 MODULE_AUTHOR("Embedded Alley Solutions, Inc");
 179 MODULE_DESCRIPTION(BOARD_MAP_NAME " MTD driver");
 180 MODULE_LICENSE("GPL");