[adm5120] USB driver fixes

[openwrt.git] / target / linux / adm5120-2.6 / files / arch / mips / adm5120 / trxsplit.c

diff --git a/target/linux/adm5120-2.6/files/arch/mips/adm5120/trxsplit.c b/target/linux/adm5120-2.6/files/arch/mips/adm5120/trxsplit.c
index 0377892..9dee185 100644 (file)
--- a/target/linux/adm5120-2.6/files/arch/mips/adm5120/trxsplit.c
+++ b/target/linux/adm5120-2.6/files/arch/mips/adm5120/trxsplit.c
@@ -53,12 +53,11 @@ struct trx_header {
 
 #define BLOCK_LEN_MIN          0x10000
 
-static struct mtd_info *trx_mtd_master = NULL;
-static struct mtd_info *trx_mtds[TRX_MAX_OFFSET];
+static struct mtd_info *trx_mtd = NULL;
+static unsigned long trx_offset = 0;
+static int trx_nr_parts = 0;
 static struct mtd_partition trx_parts[TRX_MAX_OFFSET];
 static struct trx_header trx_hdr;
-static int trx_nr_parts = 0;
-static int trx_rootfs_part = -1;
 
 static int __init trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
 {
@@ -66,11 +65,15 @@ static int __init trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
        int err;
 
        err = mtd->read(mtd, offset, sizeof(trx_hdr), &retlen, (void *)&trx_hdr);
-       if (err)
+       if (err) {
+               printk(KERN_ALERT PFX "unable to read from '%s'\n", mtd->name);
                goto err_out;
+       }
 
-       if (retlen != sizeof(trx_hdr))
+       if (retlen != sizeof(trx_hdr)) {
+               printk(KERN_ALERT PFX "reading failed on '%s'\n", mtd->name);
                goto err_out;
+       }
 
        trx_hdr.magic = le32_to_cpu(trx_hdr.magic);
        trx_hdr.len = le32_to_cpu(trx_hdr.len);
@@ -89,55 +92,67 @@ static int __init trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
 
        /* TODO: add crc32 checking too? */
 
-       return 1;
+       return 0;
 
 err_out:
-       return 0;
+       return -1;
 }
 
-static void __init trxsplit_create_partitions(struct mtd_info *mtd,
-       unsigned long offset)
+static int __init trxsplit_create_partitions(void)
 {
        struct mtd_partition *part = trx_parts;
+       int ret = 0;
        int i;
 
-       for (i=0;i<TRX_MAX_OFFSET;i++) {
+       if (trx_mtd == NULL)
+               goto out;
+
+       printk(KERN_INFO PFX "creating TRX partitions in '%s' (%d,%d)\n",
+               trx_mtd->name, MTD_BLOCK_MAJOR, trx_mtd->index);
+
+       for (i=0; i<TRX_MAX_OFFSET;i++) {
                part = &trx_parts[i];
                if (trx_hdr.offsets[i] == 0)
                        continue;
-               part->offset = offset + trx_hdr.offsets[i];
-               part->mtdp = &trx_mtds[trx_nr_parts];
+               part->offset = trx_offset + trx_hdr.offsets[i];
                trx_nr_parts++;
        }
 
        for (i=0; i<trx_nr_parts-1; i++) {
                trx_parts[i].size = trx_parts[i+1].offset - trx_parts[i].offset;
        }
-       trx_parts[i].size = mtd->size - trx_parts[i].offset;
+       trx_parts[i].size = trx_mtd->size - trx_parts[i].offset;
 
        i=0;
        part = &trx_parts[i];
        if (part->size < TRX_MIN_KERNEL_SIZE) {
-               part->name = "trx_loader";
+               part->name = "loader";
                i++;
        }
 
        part = &trx_parts[i];
-       part->name = "trx_kernel";
+       part->name = "kernel";
        i++;
 
        part = &trx_parts[i];
-       part->name = "trx_rootfs";
-       trx_rootfs_part = i;
+       part->name = "rootfs";
+
+       ret = add_mtd_partitions(trx_mtd, trx_parts, trx_nr_parts);
+       if (ret) {
+               printk(KERN_ALERT PFX "creating TRX partitions failed\n");
+       }
+
+out:
+       return ret;
 }
 
 static void __init trxsplit_add_mtd(struct mtd_info *mtd)
 {
        unsigned long offset;
        unsigned long blocklen;
-       int found;
+       int err;
 
-       if (trx_mtd_master)
+       if (trx_mtd)
                return;
 
        blocklen = mtd->erasesize;
@@ -146,27 +161,27 @@ static void __init trxsplit_add_mtd(struct mtd_info *mtd)
 
        printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name);
 
-       found = 0;
+       err = 0;
        for (offset=0; offset < mtd->size; offset+=blocklen) {
-               found = trxsplit_checktrx(mtd, offset);
-               if (found)
+               err = trxsplit_checktrx(mtd, offset);
+               if (err == 0)
                        break;
        }
 
-       if (found == 0) {
+       if (err) {
                printk(KERN_ALERT PFX "no TRX header found\n");
                return;
        }
 
        printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset);
 
-       trxsplit_create_partitions(mtd, offset);
-
-       trx_mtd_master = mtd;
+       trx_mtd = mtd;
+       trx_offset = offset;
 }
 
-static void trxsplit_remove_mtd(struct mtd_info *mtd)
+static void __init trxsplit_remove_mtd(struct mtd_info *mtd)
 {
+       /* nothing to do */
 }
 
 static struct mtd_notifier trxsplit_notifier __initdata = {
@@ -182,38 +197,12 @@ static void __init trxsplit_find_trx(void)
 
 static int __init trxsplit_init(void)
 {
-       int err;
-       int i;
+       int ret;
 
        trxsplit_find_trx();
 
-       if (trx_mtd_master == NULL)
-               goto err;
-
-       printk(KERN_INFO PFX "creating TRX partitions in '%s'\n",
-               trx_mtd_master->name);
-
-       err = add_mtd_partitions(trx_mtd_master, trx_parts, trx_nr_parts);
-       if (err) {
-               printk(KERN_ALERT PFX "creating TRX partitions failed\n");
-               goto err;
-       }
-
-       for (i=0; i<trx_nr_parts; i++) {
-               /* TODO: add error checking */
-               add_mtd_device(trx_mtds[i]);
-       }
-
-       if (ROOT_DEV == 0 && trx_rootfs_part >= 0) {
-               printk(KERN_INFO PFX "set '%s' to be root filesystem\n",
-                       trx_mtds[trx_rootfs_part]->name);
-               ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, trx_mtds[trx_rootfs_part]->index);
-       }
-
-       return 0;
-
-err:
-       return -1;
+       ret = trxsplit_create_partitions();
+       return ret;
 }
 
 late_initcall(trxsplit_init);