Use sn9 mtd driver
[openwrt/svn-archive/archive.git] / target / linux / rdc-2.6 / files / drivers / mtd / maps / rdc3210.c
index 3ec9348253e389764be890d3d50fba80961e11bf..b41d4474d297ee1003ac9e27feb6847f7e54e462 100644 (file)
-/*
- * $Id$
- * Copyright (C) 2005 Gemtek Corporation, Dante Su (dante_su@gemtek.com.tw)
- * Copyright (C) 2006  Florian Fainelli <florian@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
+/*******************************************************************
+ * Simple Flash mapping for RDC3210                                *
+ *                                                                 *
+ *                                                     2005.03.23  *
+ *                              Dante Su (dante_su@gemtek.com.tw)  *
+ *                          Copyright (C) 2005 Gemtek Corporation  *
+ *******************************************************************/
 
-#include <asm/io.h>
-#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/mtd/map.h>
+#include <asm/io.h>
 #include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
 #include <linux/mtd/partitions.h>
-#include <linux/vmalloc.h>
+#include <linux/autoconf.h>
+#include <linux/squashfs_fs.h>
+#include <linux/jffs2.h>
+//#include <linux/crc32.h>
+
+#define WINDOW_ADDR            0xFFC00000
+#define WINDOW_SIZE            0x00400000
+
+#define BUSWIDTH 2
+
+/* Dante: linked from linux-2.4.x/drivers/mtd/chips/flashdrv.c */
+extern int flashdrv_get_size(void);
+extern int flashdrv_get_sector(int addr);
+extern int flashdrv_get_sector_addr(int sector);
+extern int flashdrv_get_sector_size(int sector);
+
+static struct mtd_info         *rdc3210_mtd;
+
+__u8  rdc3210_map_read8(struct map_info *map, unsigned long ofs)
+{
+       return *(__u8 *)(map->map_priv_1 + ofs);
+}
 
-#define WINDOW_ADDR             0xFFC00000
-#define WINDOW_SIZE             0x00400000
-#define BUSWIDTH               2
+__u16 rdc3210_map_read16(struct map_info *map, unsigned long ofs)
+{
+       return *(__u16 *)(map->map_priv_1 + ofs);
+}
+
+__u32 rdc3210_map_read32(struct map_info *map, unsigned long ofs)
+{
+       return *(__u32 *)(map->map_priv_1 + ofs);
+}
 
-extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
+void rdc3210_map_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+       *(__u8 *)(map->map_priv_1 + adr) = d;
+}
 
-static struct mtd_partition *parsed_parts;
-static struct mtd_info *rdc3210_mtd_info;
+void rdc3210_map_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+       *(__u16 *)(map->map_priv_1 + adr) = d;
+}
+
+void rdc3210_map_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+       *(__u32 *)(map->map_priv_1 + adr) = d;
+}
+
+void rdc3210_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+       int     i;
+       u16     *dst = (u16 *)(to);
+       u16     *src = (u16 *)(map->map_priv_1 + from);
+
+       for(i = 0; i < (len / 2); ++i)
+               dst[i] = src[i];
+
+       if(len & 1)
+       {
+               printk("# WARNNING!!! rdc3210_map_copy_from has odd length\n");
+               //dst[len - 1] = B0(src[i]);
+       }
+}
+
+void rdc3210_map_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+       int     i;
+       u16     *dst = (u16 *)(map->map_priv_1 + to);
+       u16     *src = (u16 *)(from);
+       
+       for(i = 0; i < (len / 2); ++i)
+               dst[i] = src[i];
+
+       if(len & 1)
+       {
+               printk("# WARNNING!!! rdc3210_map_copy_from has odd length\n");
+               //dst[len - 1] = B0(src[i]);
+       }
+}
+
+struct map_info rdc3210_map = 
+{
+       .name =         "RDC3210 Flash",
+       .size =         WINDOW_SIZE,
+       .phys =         WINDOW_ADDR,
+       .bankwidth =    BUSWIDTH,
+};
 
-static struct map_info rdc3210_map = {
-       .name = "rdc3210",
-       .size = WINDOW_SIZE,
-       .bankwidth = BUSWIDTH,
-       .phys = WINDOW_ADDR,
+/* Dante: This is the default static mapping, however this is nothing but a hint. (Say dynamic mapping) */
+static struct mtd_partition rdc3210_parts[] = 
+{
+       { name: "linux",   offset:  0,          size: 0x003C0000 },     /* 3840 KB = (Kernel + ROMFS) = (768 KB + 3072 KB) */
+       { name: "romfs",   offset:  0x000C0000, size: 0x00300000 },     /* 3072 KB */
+       { name: "nvram",   offset:  0x003C0000, size: 0x00010000 },     /*   64 KB */
+#if RDC3210_STATIC_MAP || RDC3210_FACTORY_PRESENT
+       { name: "factory", offset:  0x003D0000, size: 0x00010000 },     /*   64 KB */
+#endif
+       { name: "bootldr", offset:  0x003E0000, size: 0x00020000 },     /*  128 KB */
 };
 
-static struct mtd_partition rdc3210_parts[] = {
-       { name: "linux",   offset:  0,          size: 0x003C0000 },     /* 3840 KB = (Kernel + ROMFS) = (768 KB + 3072 KB) */
-       { name: "romfs",   offset:  0x000C0000, size: 0x00300000 },     /* 3072 KB */
-       { name: "nvram",   offset:  0x003C0000, size: 0x00010000 },                     /*   64 KB */
-       { name: "factory", offset:  0x003D0000, size: 0x00010000 },                     /*   64 KB */
-       { name: "bootldr", offset:  0x003E0000, size: 0x00020000, mask_flags: MTD_WRITEABLE },/*  128 KB */
+static __u32 crctab[257] = {
+       0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
+       0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
+       0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+       0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
+       0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+       0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+       0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
+       0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
+       0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+       0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+       0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
+       0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+       0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
+       0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
+       0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+       0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
+       0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
+       0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+       0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
+       0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+       0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+       0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
+       0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
+       0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+       0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+       0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
+       0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+       0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
+       0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
+       0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+       0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
+       0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
+       0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+       0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
+       0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+       0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+       0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
+       0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
+       0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+       0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+       0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
+       0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+       0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
+       0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
+       0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+       0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
+       0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
+       0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+       0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
+       0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+       0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+       0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
+       0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
+       0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+       0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+       0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
+       0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+       0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
+       0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
+       0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+       0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
+       0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
+       0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+       0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
+       0
 };
 
-static int __init rdc3210_mtd_init(void)
+static __u32 crc32(__u8 * buf, __u32 len)
 {
-       printk(KERN_INFO "rdc3210: 0x%08x at 0x%08x\n", WINDOW_SIZE, WINDOW_ADDR);
-       rdc3210_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
+       register int i;
+       __u32 sum;
+       register __u32 s0;
+       s0 = ~0;
+       for (i = 0; i < len; i++) {
+               s0 = (s0 >> 8) ^ crctab[(__u8) (s0 & 0xFF) ^ buf[i]];
+       }
+       sum = ~s0;
+       return sum;
+}
 
-       if (!rdc3210_map.virt) {
-               printk(KERN_ERR "rdc3210: failed to ioremap\n");
-               return -EIO;
+static void erase_callback(struct erase_info *done)
+{
+       wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
+       wake_up(wait_q);
+}
+
+static int erase_write (struct mtd_info *mtd, unsigned long pos, 
+                       int len, const char *buf)
+{
+       struct erase_info erase;
+       DECLARE_WAITQUEUE(wait, current);
+       wait_queue_head_t wait_q;
+       size_t retlen;
+       int ret;
+
+       /*
+        * First, let's erase the flash block.
+        */
+
+       init_waitqueue_head(&wait_q);
+       erase.mtd = mtd;
+       erase.callback = erase_callback;
+       erase.addr = pos;
+       erase.len = len;
+       erase.priv = (u_long)&wait_q;
+
+       set_current_state(TASK_INTERRUPTIBLE);
+       add_wait_queue(&wait_q, &wait);
+
+       ret = mtd->erase(mtd, &erase);
+       if (ret) {
+               set_current_state(TASK_RUNNING);
+               remove_wait_queue(&wait_q, &wait);
+               printk (KERN_WARNING "erase of region [0x%lx, 0x%x] "
+                                    "on \"%s\" failed\n",
+                       pos, len, mtd->name);
+               return ret;
        }
 
-       simple_map_init(&rdc3210_map);
+       schedule();  /* Wait for erase to finish. */
+       remove_wait_queue(&wait_q, &wait);
+
+       /*
+        * Next, writhe data to flash.
+        */
+
+       ret = mtd->write (mtd, pos, len, &retlen, buf);
+       if (ret)
+               return ret;
+       if (retlen != len)
+               return -EIO;
+       return 0;
+}
 
-       rdc3210_mtd_info = do_map_probe("cfi_probe", &rdc3210_map);
+static int __init init_rdc3210_map(void)
+{
+               printk(KERN_NOTICE "flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
+               
+       rdc3210_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
 
-       if (rdc3210_mtd_info)
+       if (!rdc3210_map.map_priv_1) 
        {
-               rdc3210_mtd_info->owner = THIS_MODULE;
-               int parsed_nr_parts = 0;
-               char * part_type;
+               printk("Failed to ioremap\n");
+               return -EIO;
+       }
+       rdc3210_mtd = do_map_probe("cfi_probe", &rdc3210_map);
+#if RDC3210_STATIC_MAP /* Dante: This is for fixed map */
+       if (rdc3210_mtd) 
+       {
+               rdc3210_mtd->module = THIS_MODULE;
+               add_mtd_partitions(rdc3210_mtd, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
+               return 0;
+       }
+#else  /* Dante: This is for dynamic mapping */
 
-#ifdef CONFIG_MTD_REDBOOT_PARTS
-               if (parsed_nr_parts == 0)
+#include "imghdr.h"
+
+       if (rdc3210_mtd) 
+       {       // Dante
+               gt_imghdr_t     *hdr = (gt_imghdr_t *)(rdc3210_map.map_priv_1), *ptmp;
+               unsigned int    tmp = hdr->kernelsz + sizeof(gt_imghdr_t), tmp2 = rdc3210_mtd->erasesize;
+               unsigned int    tmp3 = ((tmp / 32) + ((tmp % 32) ? 1 : 0)) * 32;
+               unsigned int    tmp4 = ((tmp / tmp2) + ((tmp % tmp2) ? 1 : 0)) * tmp2;
+               int     len;
+               
+               if(memcmp(hdr->magic, GTIMG_MAGIC, 4))
                {
-                       int ret = parse_redboot_partitions(rdc3210_mtd_info, &parsed_parts, 0);
-                       if (ret > 0)
+                       printk("Invalid MAGIC for Firmware Image!!!\n");
+                       return -EIO;
+               }
+
+#if 0
+               /* 1. Adjust Redboot */
+               tmp2 = flashdrv_get_size() - rdc3210_parts[4].size;
+               rdc3210_parts[4].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp2));
+               rdc3210_parts[4].size   = flashdrv_get_size() - rdc3210_parts[4].offset;
+               
+               /* 2. Adjust Factory Default */
+               tmp2 -= rdc3210_parts[3].size;
+               rdc3210_parts[3].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp2));
+               rdc3210_parts[3].size   = rdc3210_parts[4].offset - rdc3210_parts[3].offset;
+               /* 1. Adjust Redboot */
+               tmp2 = flashdrv_get_size() - rdc3210_parts[3].size;
+               rdc3210_parts[3].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp2));
+               rdc3210_parts[3].size   = flashdrv_get_size() - rdc3210_parts[3].offset;
+#endif
+#if RDC3210_NVRAM_IS_JFFS2
+               /* 3. Adjust NVRAM */
+               tmp = hdr->reserved;
+               if (!tmp) tmp = hdr->imagesz;
+               tmp2 = rdc3210_mtd->erasesize;
+               rdc3210_parts[2].offset = rdc3210_parts[0].offset + (((tmp / tmp2) + ((tmp % tmp2) ? 1 : 0)) * tmp2);
+               rdc3210_parts[2].size   = rdc3210_parts[3].offset - rdc3210_parts[2].offset;
+               
+               /* 4. Adjust Linux (Kernel + ROMFS) */
+               rdc3210_parts[0].size   = rdc3210_parts[3].offset - rdc3210_parts[0].offset;
+
+               /* 5. Adjust ROMFS */
+               tmp = hdr->kernelsz + sizeof(gt_imghdr_t);
+#else
+               /* 3. Adjust NVRAM */
+               tmp2 -= rdc3210_parts[2].size;
+               rdc3210_parts[2].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp2));
+               rdc3210_parts[2].size   = rdc3210_parts[3].offset - rdc3210_parts[2].offset;
+                               
+               /* 4. Adjust Linux (Kernel + ROMFS) */
+               rdc3210_parts[0].size   = rdc3210_parts[2].offset - rdc3210_parts[0].offset;
+
+               /* 5. Adjust ROMFS */
+               tmp2 = rdc3210_mtd->erasesize;
+#endif
+               if ((ptmp = (gt_imghdr_t *)kmalloc(tmp4, GFP_KERNEL)) == NULL)
+               {
+                       iounmap((void *)rdc3210_map.map_priv_1);
+                       return -ENOMEM;
+               }
+               if (rdc3210_mtd->read(rdc3210_mtd, 0, tmp4, &len, (__u8 *)ptmp) || len != tmp4)
+               {
+                       kfree(ptmp);
+                       goto oh_snap;
+               }
+               if (*(__u32 *)(((unsigned char *)ptmp)+tmp3) == SQUASHFS_MAGIC)
+                       tmp4 = tmp3;
+               else if (!hdr->reserved)
+               {
+                       __u8    buf[1024];
+                       ptmp->reserved = hdr->imagesz;
+                       ptmp->imagesz = tmp4;
+                       ptmp->checksum = ptmp->fastcksum = 0;
+                       memcpy(buf, ptmp, 0x100);
+                       memcpy(buf + 0x100, ((__u8 *)ptmp) + ((tmp4 >> 1) - ((tmp4 & 0x6) >> 1)), 0x100);
+                       memcpy(buf + 0x200, ((__u8 *)ptmp) + (tmp4 - 0x200), 0x200);
+                       ptmp->fastcksum = crc32(buf, sizeof(buf));
+                       ptmp->checksum = crc32((__u8 *)ptmp, tmp4);
+                       if (rdc3210_mtd->unlock) rdc3210_mtd->unlock(rdc3210_mtd, 0, tmp2);
+                       if (len == erase_write(rdc3210_mtd, 0, tmp2, (char *)ptmp))
                        {
-                               part_type = "RedBoot";
-                               parsed_nr_parts = ret;
-                       } else {
-                               printk(KERN_ERR "rdc3210: failed to parse RedBoot partitions, using static mapping\n");
-                               add_mtd_partitions(rdc3210_mtd_info, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
-                               return -ENXIO;
+                               kfree(ptmp);
+                               iounmap((void *)rdc3210_map.map_priv_1);
+                               return len;
                        }
+                       if (rdc3210_mtd->sync) rdc3210_mtd->sync(rdc3210_mtd);
                }
-
-               add_mtd_partitions(rdc3210_mtd_info, parsed_parts, parsed_nr_parts);
+               kfree(ptmp);
+               rdc3210_parts[1].offset = rdc3210_parts[0].offset + tmp4;
+               rdc3210_parts[1].size   = rdc3210_parts[2].offset - rdc3210_parts[1].offset;
+               
+               rdc3210_mtd->owner = THIS_MODULE;
+               add_mtd_partitions(rdc3210_mtd, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
                return 0;
        }
 #endif
-       iounmap(rdc3210_map.virt);
+oh_snap:
+       iounmap((void *)rdc3210_map.map_priv_1);
        return -ENXIO;
 }
 
-static void __exit rdc3210_mtd_cleanup(void)
+static void __exit cleanup_rdc3210_map(void)
 {
-       if (rdc3210_mtd_info)
+       if (rdc3210_mtd
        {
-               del_mtd_partitions(rdc3210_mtd_info);
-               map_destroy(rdc3210_mtd_info);
+               del_mtd_partitions(rdc3210_mtd);
+               map_destroy(rdc3210_mtd);
        }
-
-       if (rdc3210_map.virt) {
-               iounmap(rdc3210_map.virt);
-               rdc3210_map.virt = 0;
+       
+       if (rdc3210_map.map_priv_1) 
+       {
+               iounmap((void *)rdc3210_map.map_priv_1);
+               rdc3210_map.map_priv_1 = 0L;
        }
 }
 
-module_init(rdc3210_mtd_init);
-module_exit(rdc3210_mtd_cleanup);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("RDC3210 flash map driver");
-MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+module_init(init_rdc3210_map);
+module_exit(cleanup_rdc3210_map);