target/linux/rdc-2.6/files/drivers/mtd/maps/rdc3210.c

   1 /*
   2  * $Id$
   3  * Copyright (C) 2005 Gemtek Corporation, Dante Su (dante_su@gemtek.com.tw)
   4  * Copyright (C) 2006  Florian Fainelli <florian@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include <asm/io.h>
  22 #include <linux/init.h>
  23 #include <linux/kernel.h>
  24 #include <linux/mtd/map.h>
  25 #include <linux/mtd/mtd.h>
  26 #include <linux/mtd/partitions.h>
  27 #include <linux/vmalloc.h>
  28
  29 #define WINDOW_ADDR             0xFFC00000
  30 #define WINDOW_SIZE             0x00400000
  31 #define BUSWIDTH                2
  32
  33 extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
  34
  35 static struct mtd_partition *parsed_parts;
  36 static struct mtd_info *rdc3210_mtd_info;
  37
  38 static struct map_info rdc3210_map = {
  39         .name = "rdc3210",
  40         .size = WINDOW_SIZE,
  41         .bankwidth = BUSWIDTH,
  42         .phys = WINDOW_ADDR,
  43 };
  44
  45 static struct mtd_partition rdc3210_parts[] = {
  46         { name: "linux",   offset:  0,          size: 0x003C0000 },     /* 3840 KB = (Kernel + ROMFS) = (768 KB + 3072 KB) */
  47         { name: "romfs",   offset:  0x000C0000, size: 0x00300000 },     /* 3072 KB */
  48         { name: "nvram",   offset:  0x003C0000, size: 0x00010000 },                     /*   64 KB */
  49         { name: "factory", offset:  0x003D0000, size: 0x00010000 },                     /*   64 KB */
  50         { name: "bootldr", offset:  0x003E0000, size: 0x00020000, mask_flags: MTD_WRITEABLE },/*  128 KB */
  51 };
  52
  53 static int __init rdc3210_mtd_init(void)
  54 {
  55         printk(KERN_INFO "rdc3210: 0x%08x at 0x%08x\n", WINDOW_SIZE, WINDOW_ADDR);
  56         rdc3210_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
  57
  58         if (!rdc3210_map.virt) {
  59                 printk(KERN_ERR "rdc3210: failed to ioremap\n");
  60                 return -EIO;
  61         }
  62
  63         simple_map_init(&rdc3210_map);
  64
  65         rdc3210_mtd_info = do_map_probe("cfi_probe", &rdc3210_map);
  66
  67         if (rdc3210_mtd_info)
  68         {
  69                 rdc3210_mtd_info->owner = THIS_MODULE;
  70                 int parsed_nr_parts = 0;
  71                 char * part_type;
  72
  73 #ifdef CONFIG_MTD_REDBOOT_PARTS
  74                 if (parsed_nr_parts == 0)
  75                 {
  76                         int ret = parse_redboot_partitions(rdc3210_mtd_info, &parsed_parts, 0);
  77                         if (ret > 0)
  78                         {
  79                                 part_type = "RedBoot";
  80                                 parsed_nr_parts = ret;
  81                         } else {
  82                                 printk(KERN_ERR "rdc3210: failed to parse RedBoot partitions, using static mapping\n");
  83                                 add_mtd_partitions(rdc3210_mtd_info, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
  84                                 return -ENXIO;
  85                         }
  86                 }
  87
  88                 add_mtd_partitions(rdc3210_mtd_info, parsed_parts, parsed_nr_parts);
  89                 return 0;
  90         }
  91 #endif
  92         iounmap(rdc3210_map.virt);
  93         return -ENXIO;
  94 }
  95
  96 static void __exit rdc3210_mtd_cleanup(void)
  97 {
  98         if (rdc3210_mtd_info)
  99         {
 100                 del_mtd_partitions(rdc3210_mtd_info);
 101                 map_destroy(rdc3210_mtd_info);
 102         }
 103
 104         if (rdc3210_map.virt) {
 105                 iounmap(rdc3210_map.virt);
 106                 rdc3210_map.virt = 0;
 107         }
 108 }
 109
 110 module_init(rdc3210_mtd_init);
 111 module_exit(rdc3210_mtd_cleanup);
 112
 113 MODULE_LICENSE("GPL");
 114 MODULE_DESCRIPTION("RDC3210 flash map driver");
 115 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");