drivers/mtd/maps/redwood.c

   1 /*
   2  * $Id: redwood.c,v 1.10 2004/11/04 13:24:15 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/config.h>
  17 #include <linux/module.h>
  18 #include <linux/types.h>
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21
  22 #include <linux/mtd/mtd.h>
  23 #include <linux/mtd/map.h>
  24 #include <linux/mtd/partitions.h>
  25
  26 #include <asm/io.h>
  27
  28 #if !defined (CONFIG_REDWOOD_6)
  29
  30 #define WINDOW_ADDR 0xffc00000
  31 #define WINDOW_SIZE 0x00400000
  32
  33 #define RW_PART0_OF     0
  34 #define RW_PART0_SZ     0x10000
  35 #define RW_PART1_OF     RW_PART0_SZ
  36 #define RW_PART1_SZ     0x200000 - 0x10000
  37 #define RW_PART2_OF     0x200000
  38 #define RW_PART2_SZ     0x10000
  39 #define RW_PART3_OF     0x210000
  40 #define RW_PART3_SZ     0x200000 - (0x10000 + 0x20000)
  41 #define RW_PART4_OF     0x3e0000
  42 #define RW_PART4_SZ     0x20000
  43
  44 static struct mtd_partition redwood_flash_partitions[] = {
  45         {
  46                 .name = "Redwood OpenBIOS Vital Product Data",
  47                 .offset = RW_PART0_OF,
  48                 .size = RW_PART0_SZ,
  49                 .mask_flags = MTD_WRITEABLE     /* force read-only */
  50         },
  51         {
  52                 .name = "Redwood kernel",
  53                 .offset = RW_PART1_OF,
  54                 .size = RW_PART1_SZ
  55         },
  56         {
  57                 .name = "Redwood OpenBIOS non-volatile storage",
  58                 .offset = RW_PART2_OF,
  59                 .size = RW_PART2_SZ,
  60                 .mask_flags = MTD_WRITEABLE     /* force read-only */
  61         },
  62         {
  63                 .name = "Redwood filesystem",
  64                 .offset = RW_PART3_OF,
  65                 .size = RW_PART3_SZ
  66         },
  67         {
  68                 .name = "Redwood OpenBIOS",
  69                 .offset = RW_PART4_OF,
  70                 .size = RW_PART4_SZ,
  71                 .mask_flags = MTD_WRITEABLE     /* force read-only */
  72         }
  73 };
  74
  75 #else /* CONFIG_REDWOOD_6 */
  76 /* FIXME: the window is bigger - armin */
  77 #define WINDOW_ADDR 0xff800000
  78 #define WINDOW_SIZE 0x00800000
  79
  80 #define RW_PART0_OF     0
  81 #define RW_PART0_SZ     0x400000        /* 4 MiB data */
  82 #define RW_PART1_OF     RW_PART0_OF + RW_PART0_SZ
  83 #define RW_PART1_SZ     0x10000         /* 64K VPD */
  84 #define RW_PART2_OF     RW_PART1_OF + RW_PART1_SZ
  85 #define RW_PART2_SZ     0x400000 - (0x10000 + 0x20000)
  86 #define RW_PART3_OF     RW_PART2_OF + RW_PART2_SZ
  87 #define RW_PART3_SZ     0x20000
  88
  89 static struct mtd_partition redwood_flash_partitions[] = {
  90         {
  91                 .name = "Redwood filesystem",
  92                 .offset = RW_PART0_OF,
  93                 .size = RW_PART0_SZ
  94         },
  95         {
  96                 .name = "Redwood OpenBIOS Vital Product Data",
  97                 .offset = RW_PART1_OF,
  98                 .size = RW_PART1_SZ,
  99                 .mask_flags = MTD_WRITEABLE     /* force read-only */
 100         },
 101         {
 102                 .name = "Redwood kernel",
 103                 .offset = RW_PART2_OF,
 104                 .size = RW_PART2_SZ
 105         },
 106         {
 107                 .name = "Redwood OpenBIOS",
 108                 .offset = RW_PART3_OF,
 109                 .size = RW_PART3_SZ,
 110                 .mask_flags = MTD_WRITEABLE     /* force read-only */
 111         }
 112 };
 113
 114 #endif /* CONFIG_REDWOOD_6 */
 115
 116 struct map_info redwood_flash_map = {
 117         .name = "IBM Redwood",
 118         .size = WINDOW_SIZE,
 119         .bankwidth = 2,
 120         .phys = WINDOW_ADDR,
 121 };
 122
 123
 124 #define NUM_REDWOOD_FLASH_PARTITIONS \
 125         (sizeof(redwood_flash_partitions)/sizeof(redwood_flash_partitions[0]))
 126
 127 static struct mtd_info *redwood_mtd;
 128
 129 int __init init_redwood_flash(void)
 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                 return add_mtd_partitions(redwood_mtd,
 147                                 redwood_flash_partitions,
 148                                 NUM_REDWOOD_FLASH_PARTITIONS);
 149         }
 150
 151         return -ENXIO;
 152 }
 153
 154 static void __exit cleanup_redwood_flash(void)
 155 {
 156         if (redwood_mtd) {
 157                 del_mtd_partitions(redwood_mtd);
 158                 /* moved iounmap after map_destroy - armin */
 159                 map_destroy(redwood_mtd);
 160                 iounmap((void *)redwood_flash_map.virt);
 161         }
 162 }
 163
 164 module_init(init_redwood_flash);
 165 module_exit(cleanup_redwood_flash);
 166
 167 MODULE_LICENSE("GPL");
 168 MODULE_AUTHOR("MontaVista Software <source@mvista.com>");
 169 MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards");