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 1.11 2004/07/12 21:59:44 dwmw2 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 #include <asm/au1000.h>
  21
  22 #ifdef  DEBUG_RW
  23 #define DBG(x...)       printk(x)
  24 #else
  25 #define DBG(x...)
  26 #endif
  27
  28 #ifdef CONFIG_MIPS_PB1000
  29
  30 #define WINDOW_ADDR 0x1F800000
  31 #define WINDOW_SIZE 0x800000
  32
  33 static struct mtd_partition pb1xxx_partitions[] = {
  34         {
  35                 .name         =  "yamon env",
  36                 .size         =   0x00020000,
  37                 .offset       =   0,
  38                 .mask_flags   =   MTD_WRITEABLE},
  39         {
  40                 .name         =   "User FS",
  41                 .size         =   0x003e0000,
  42                 .offset       =   0x20000,},
  43         {
  44                 .name         =   "boot code",
  45                 .size         =   0x100000,
  46                 .offset       =   0x400000,
  47                 .mask_flags   =   MTD_WRITEABLE},
  48         {
  49                 .name         =   "raw/kernel",
  50                 .size         =   0x300000,
  51                 .offset       =   0x500000}
  52 };
  53
  54 #elif defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_PB1100)
  55
  56 #if defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
  57 /* both 32MB banks will be used. Combine the first 32MB bank and the
  58  * first 28MB of the second bank together into a single jffs/jffs2
  59  * partition.
  60  */
  61 #define WINDOW_ADDR 0x1C000000
  62 #define WINDOW_SIZE 0x4000000
  63 static struct mtd_partition pb1xxx_partitions[] = {
  64         {
  65                 .name         =   "User FS",
  66                 .size         =   0x3c00000,
  67                 .offset       =   0x0000000
  68         },{
  69                 .name         =   "yamon",
  70                 .size         =   0x0100000,
  71                 .offset       =   0x3c00000,
  72                 .mask_flags   =   MTD_WRITEABLE
  73         },{
  74                 .name         =   "raw kernel",
  75                 .size         =   0x02c0000,
  76                 .offset       =   0x3d00000
  77         }
  78 };
  79 #elif defined(CONFIG_MTD_PB1500_BOOT) && !defined(CONFIG_MTD_PB1500_USER)
  80 #define WINDOW_ADDR 0x1E000000
  81 #define WINDOW_SIZE 0x2000000
  82 static struct mtd_partition pb1xxx_partitions[] = {
  83         {
  84                 .name         =   "User FS",
  85                 .size         =   0x1c00000,
  86                 .offset       =   0x0000000
  87         },{
  88                 .name         =   "yamon",
  89                 .size         =   0x0100000,
  90                 .offset       =   0x1c00000,
  91                 .mask_flags   =   MTD_WRITEABLE
  92         },{
  93                 .name         =   "raw kernel",
  94                 .size         =   0x02c0000,
  95                 .offset       =   0x1d00000
  96         }
  97 };
  98 #elif !defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
  99 #define WINDOW_ADDR 0x1C000000
 100 #define WINDOW_SIZE 0x2000000
 101 static struct mtd_partition pb1xxx_partitions[] = {
 102         {
 103                 .name         =   "User FS",
 104                 .size         =    0x1e00000,
 105                 .offset       =    0x0000000
 106         },{
 107                 .name         =    "raw kernel",
 108                 .size         =    0x0200000,
 109                 .offset       =    0x1e00000,
 110         }
 111 };
 112 #else
 113 #error MTD_PB1500 define combo error /* should never happen */
 114 #endif
 115 #else
 116 #error Unsupported board
 117 #endif
 118
 119 #define NAME            "Pb1x00 Linux Flash"
 120 #define PADDR           WINDOW_ADDR
 121 #define BUSWIDTH        4
 122 #define SIZE            WINDOW_SIZE
 123 #define PARTITIONS      4
 124
 125 static struct map_info pb1xxx_mtd_map = {
 126         .name           = NAME,
 127         .size           = SIZE,
 128         .bankwidth      = BUSWIDTH,
 129         .phys           = PADDR,
 130 };
 131
 132 static struct mtd_info *pb1xxx_mtd;
 133
 134 int __init pb1xxx_mtd_init(void)
 135 {
 136         struct mtd_partition *parts;
 137         int nb_parts = 0;
 138         char *part_type;
 139
 140         /*
 141          * Static partition definition selection
 142          */
 143         part_type = "static";
 144         parts = pb1xxx_partitions;
 145         nb_parts = ARRAY_SIZE(pb1xxx_partitions);
 146
 147         /*
 148          * Now let's probe for the actual flash.  Do it here since
 149          * specific machine settings might have been set above.
 150          */
 151         printk(KERN_NOTICE "Pb1xxx flash: probing %d-bit flash bus\n",
 152                         BUSWIDTH*8);
 153         pb1xxx_mtd_map.virt = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
 154
 155         simple_map_init(&pb1xxx_mtd_map);
 156
 157         pb1xxx_mtd = do_map_probe("cfi_probe", &pb1xxx_mtd_map);
 158         if (!pb1xxx_mtd) return -ENXIO;
 159         pb1xxx_mtd->owner = THIS_MODULE;
 160
 161         add_mtd_partitions(pb1xxx_mtd, parts, nb_parts);
 162         return 0;
 163 }
 164
 165 static void __exit pb1xxx_mtd_cleanup(void)
 166 {
 167         if (pb1xxx_mtd) {
 168                 del_mtd_partitions(pb1xxx_mtd);
 169                 map_destroy(pb1xxx_mtd);
 170                 iounmap((void *) pb1xxx_mtd_map.virt);
 171         }
 172 }
 173
 174 module_init(pb1xxx_mtd_init);
 175 module_exit(pb1xxx_mtd_cleanup);
 176
 177 MODULE_AUTHOR("Pete Popov");
 178 MODULE_DESCRIPTION("Pb1xxx CFI map driver");
 179 MODULE_LICENSE("GPL");