release/src-rt-6.x/linux/linux-2.6/drivers/mtd/maps/redwood.c

   1 /*
   2  * $Id: redwood.c,v 1.11 2005/11/07 11:14:28 gleixner Exp $
   3  *
   4  * drivers/mtd/maps/redwood.c
   5  *
   6  * FLASH map for the IBM Redwood 4/5/6 boards.
   7  *
   8  * Author: MontaVista Software, Inc. <source@mvista.com>
   9  *
  10  * 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under
  11  * the terms of the GNU General Public License version 2. This program
  12  * is licensed "as is" without any warranty of any kind, whether express
  13  * or implied.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20
  21 #include <linux/mtd/mtd.h>
  22 #include <linux/mtd/map.h>
  23 #include <linux/mtd/partitions.h>
  24
  25 #include <asm/io.h>
  26
  27 #if !defined (CONFIG_REDWOOD_6)
  28
  29 #define WINDOW_ADDR 0xffc00000
  30 #define WINDOW_SIZE 0x00400000
  31
  32 #define RW_PART0_OF     0
  33 #define RW_PART0_SZ     0x10000
  34 #define RW_PART1_OF     RW_PART0_SZ
  35 #define RW_PART1_SZ     0x200000 - 0x10000
  36 #define RW_PART2_OF     0x200000
  37 #define RW_PART2_SZ     0x10000
  38 #define RW_PART3_OF     0x210000
  39 #define RW_PART3_SZ     0x200000 - (0x10000 + 0x20000)
  40 #define RW_PART4_OF     0x3e0000
  41 #define RW_PART4_SZ     0x20000
  42
  43 static struct mtd_partition redwood_flash_partitions[] = {
  44         {
  45                 .name = "Redwood OpenBIOS Vital Product Data",
  46                 .offset = RW_PART0_OF,
  47                 .size = RW_PART0_SZ,
  48                 .mask_flags = MTD_WRITEABLE     /* force read-only */
  49         },
  50         {
  51                 .name = "Redwood kernel",
  52                 .offset = RW_PART1_OF,
  53                 .size = RW_PART1_SZ
  54         },
  55         {
  56                 .name = "Redwood OpenBIOS non-volatile storage",
  57                 .offset = RW_PART2_OF,
  58                 .size = RW_PART2_SZ,
  59                 .mask_flags = MTD_WRITEABLE     /* force read-only */
  60         },
  61         {
  62                 .name = "Redwood filesystem",
  63                 .offset = RW_PART3_OF,
  64                 .size = RW_PART3_SZ
  65         },
  66         {
  67                 .name = "Redwood OpenBIOS",
  68                 .offset = RW_PART4_OF,
  69                 .size = RW_PART4_SZ,
  70                 .mask_flags = MTD_WRITEABLE     /* force read-only */
  71         }
  72 };
  73
  74 #else /* CONFIG_REDWOOD_6 */
  75 /* FIXME: the window is bigger - armin */
  76 #define WINDOW_ADDR 0xff800000
  77 #define WINDOW_SIZE 0x00800000
  78
  79 #define RW_PART0_OF     0
  80 #define RW_PART0_SZ     0x400000        /* 4 MiB data */
  81 #define RW_PART1_OF     RW_PART0_OF + RW_PART0_SZ
  82 #define RW_PART1_SZ     0x10000         /* 64K VPD */
  83 #define RW_PART2_OF     RW_PART1_OF + RW_PART1_SZ
  84 #define RW_PART2_SZ     0x400000 - (0x10000 + 0x20000)
  85 #define RW_PART3_OF     RW_PART2_OF + RW_PART2_SZ
  86 #define RW_PART3_SZ     0x20000
  87
  88 static struct mtd_partition redwood_flash_partitions[] = {
  89         {
  90                 .name = "Redwood filesystem",
  91                 .offset = RW_PART0_OF,
  92                 .size = RW_PART0_SZ
  93         },
  94         {
  95                 .name = "Redwood OpenBIOS Vital Product Data",
  96                 .offset = RW_PART1_OF,
  97                 .size = RW_PART1_SZ,
  98                 .mask_flags = MTD_WRITEABLE     /* force read-only */
  99         },
 100         {
 101                 .name = "Redwood kernel",
 102                 .offset = RW_PART2_OF,
 103                 .size = RW_PART2_SZ
 104         },
 105         {
 106                 .name = "Redwood OpenBIOS",
 107                 .offset = RW_PART3_OF,
 108                 .size = RW_PART3_SZ,
 109                 .mask_flags = MTD_WRITEABLE     /* force read-only */
 110         }
 111 };
 112
 113 #endif /* CONFIG_REDWOOD_6 */
 114
 115 struct map_info redwood_flash_map = {
 116         .name = "IBM Redwood",
 117         .size = WINDOW_SIZE,
 118         .bankwidth = 2,
 119         .phys = WINDOW_ADDR,
 120 };
 121
 122
 123 #define NUM_REDWOOD_FLASH_PARTITIONS ARRAY_SIZE(redwood_flash_partitions)
 124
 125 static struct mtd_info *redwood_mtd;
 126
 127 int __init init_redwood_flash(void)
 128 {
 129         int err;
 130
 131         printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
 132                         WINDOW_SIZE, WINDOW_ADDR);
 133
 134         redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
 135
 136         if (!redwood_flash_map.virt) {
 137                 printk("init_redwood_flash: failed to ioremap\n");
 138                 return -EIO;
 139         }
 140         simple_map_init(&redwood_flash_map);
 141
 142         redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map);
 143
 144         if (redwood_mtd) {
 145                 redwood_mtd->owner = THIS_MODULE;
 146                 err = add_mtd_partitions(redwood_mtd,
 147                                 redwood_flash_partitions,
 148                                 NUM_REDWOOD_FLASH_PARTITIONS);
 149                 if (err) {
 150                         printk("init_redwood_flash: add_mtd_partitions failed\n");
 151                         iounmap(redwood_flash_map.virt);
 152                 }
 153                 return err;
 154
 155         }
 156
 157         iounmap(redwood_flash_map.virt);
 158         return -ENXIO;
 159 }
 160
 161 static void __exit cleanup_redwood_flash(void)
 162 {
 163         if (redwood_mtd) {
 164                 del_mtd_partitions(redwood_mtd);
 165                 /* moved iounmap after map_destroy - armin */
 166                 map_destroy(redwood_mtd);
 167                 iounmap((void *)redwood_flash_map.virt);
 168         }
 169 }
 170
 171 module_init(init_redwood_flash);
 172 module_exit(cleanup_redwood_flash);
 173
 174 MODULE_LICENSE("GPL");
 175 MODULE_AUTHOR("MontaVista Software <source@mvista.com>");
 176 MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards");