drivers/mtd/maps/pb1xxx-flash.c

   1 /*
   2  * Flash memory access on Alchemy Pb1xxx boards
   3  *
   4  * (C) 2001 Pete Popov <ppopov@mvista.com>
   5  *
   6  * $Id: pb1xxx-flash.c,v 1.14 2004/11/04 13:24:15 gleixner Exp $
   7  */
   8
   9 #include <linux/config.h>
  10 #include <linux/module.h>
  11 #include <linux/types.h>
  12 #include <linux/init.h>
  13 #include <linux/kernel.h>
  14
  15 #include <linux/mtd/mtd.h>
  16 #include <linux/mtd/map.h>
  17 #include <linux/mtd/partitions.h>
  18
  19 #include <asm/io.h>
  20
  21 #ifdef  DEBUG_RW
  22 #define DBG(x...)       printk(x)
  23 #else
  24 #define DBG(x...)
  25 #endif
  26
  27 #ifdef CONFIG_MIPS_PB1000
  28
  29 #define WINDOW_ADDR 0x1F800000
  30 #define WINDOW_SIZE 0x800000
  31
  32 static struct mtd_partition pb1xxx_partitions[] = {
  33         {
  34                 .name         =  "yamon env",
  35                 .size         =   0x00020000,
  36                 .offset       =   0,
  37                 .mask_flags   =   MTD_WRITEABLE},
  38         {
  39                 .name         =   "User FS",
  40                 .size         =   0x003e0000,
  41                 .offset       =   0x20000,},
  42         {
  43                 .name         =   "boot code",
  44                 .size         =   0x100000,
  45                 .offset       =   0x400000,
  46                 .mask_flags   =   MTD_WRITEABLE},
  47         {
  48                 .name         =   "raw/kernel",
  49                 .size         =   0x300000,
  50                 .offset       =   0x500000}
  51 };
  52
  53 #elif defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_PB1100)
  54
  55 #if defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
  56 /* both 32MB banks will be used. Combine the first 32MB bank and the
  57  * first 28MB of the second bank together into a single jffs/jffs2
  58  * partition.
  59  */
  60 #define WINDOW_ADDR 0x1C000000
  61 #define WINDOW_SIZE 0x4000000
  62 static struct mtd_partition pb1xxx_partitions[] = {
  63         {
  64                 .name         =   "User FS",
  65                 .size         =   0x3c00000,
  66                 .offset       =   0x0000000
  67         },{
  68                 .name         =   "yamon",
  69                 .size         =   0x0100000,
  70                 .offset       =   0x3c00000,
  71                 .mask_flags   =   MTD_WRITEABLE
  72         },{
  73                 .name         =   "raw kernel",
  74                 .size         =   0x02c0000,
  75                 .offset       =   0x3d00000
  76         }
  77 };
  78 #elif defined(CONFIG_MTD_PB1500_BOOT) && !defined(CONFIG_MTD_PB1500_USER)
  79 #define WINDOW_ADDR 0x1E000000
  80 #define WINDOW_SIZE 0x2000000
  81 static struct mtd_partition pb1xxx_partitions[] = {
  82         {
  83                 .name         =   "User FS",
  84                 .size         =   0x1c00000,
  85                 .offset       =   0x0000000
  86         },{
  87                 .name         =   "yamon",
  88                 .size         =   0x0100000,
  89                 .offset       =   0x1c00000,
  90                 .mask_flags   =   MTD_WRITEABLE
  91         },{
  92                 .name         =   "raw kernel",
  93                 .size         =   0x02c0000,
  94                 .offset       =   0x1d00000
  95         }
  96 };
  97 #elif !defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
  98 #define WINDOW_ADDR 0x1C000000
  99 #define WINDOW_SIZE 0x2000000
 100 static struct mtd_partition pb1xxx_partitions[] = {
 101         {
 102                 .name         =   "User FS",
 103                 .size         =    0x1e00000,
 104                 .offset       =    0x0000000
 105         },{
 106                 .name         =    "raw kernel",
 107                 .size         =    0x0200000,
 108                 .offset       =    0x1e00000,
 109         }
 110 };
 111 #else
 112 #error MTD_PB1500 define combo error /* should never happen */
 113 #endif
 114 #else
 115 #error Unsupported board
 116 #endif
 117
 118 #define NAME            "Pb1x00 Linux Flash"
 119 #define PADDR           WINDOW_ADDR
 120 #define BUSWIDTH        4
 121 #define SIZE            WINDOW_SIZE
 122 #define PARTITIONS      4
 123
 124 static struct map_info pb1xxx_mtd_map = {
 125         .name           = NAME,
 126         .size           = SIZE,
 127         .bankwidth      = BUSWIDTH,
 128         .phys           = PADDR,
 129 };
 130
 131 static struct mtd_info *pb1xxx_mtd;
 132
 133 int __init pb1xxx_mtd_init(void)
 134 {
 135         struct mtd_partition *parts;
 136         int nb_parts = 0;
 137         char *part_type;
 138
 139         /*
 140          * Static partition definition selection
 141          */
 142         part_type = "static";
 143         parts = pb1xxx_partitions;
 144         nb_parts = ARRAY_SIZE(pb1xxx_partitions);
 145
 146         /*
 147          * Now let's probe for the actual flash.  Do it here since
 148          * specific machine settings might have been set above.
 149          */
 150         printk(KERN_NOTICE "Pb1xxx flash: probing %d-bit flash bus\n",
 151                         BUSWIDTH*8);
 152         pb1xxx_mtd_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
 153
 154         simple_map_init(&pb1xxx_mtd_map);
 155
 156         pb1xxx_mtd = do_map_probe("cfi_probe", &pb1xxx_mtd_map);
 157         if (!pb1xxx_mtd) return -ENXIO;
 158         pb1xxx_mtd->owner = THIS_MODULE;
 159
 160         add_mtd_partitions(pb1xxx_mtd, parts, nb_parts);
 161         return 0;
 162 }
 163
 164 static void __exit pb1xxx_mtd_cleanup(void)
 165 {
 166         if (pb1xxx_mtd) {
 167                 del_mtd_partitions(pb1xxx_mtd);
 168                 map_destroy(pb1xxx_mtd);
 169                 iounmap((void *) pb1xxx_mtd_map.virt);
 170         }
 171 }
 172
 173 module_init(pb1xxx_mtd_init);
 174 module_exit(pb1xxx_mtd_cleanup);
 175
 176 MODULE_AUTHOR("Pete Popov");
 177 MODULE_DESCRIPTION("Pb1xxx CFI map driver");
 178 MODULE_LICENSE("GPL");