[ar71xx] WRT160NL: more mtd parser cleanup
authorGabor Juhos <juhosg@openwrt.org>
Sun, 9 Aug 2009 12:56:06 +0000 (12:56 +0000)
committerGabor Juhos <juhosg@openwrt.org>
Sun, 9 Aug 2009 12:56:06 +0000 (12:56 +0000)
SVN-Revision: 17201

target/linux/ar71xx/files/drivers/mtd/wrt160nl_part.c

index d76be1a..da54e0f 100644 (file)
@@ -1,5 +1,6 @@
 /*
- * Copyright © 2009 Christian Daniel <cd@maintech.de>
+ * Copyright (C) 2009 Christian Daniel <cd@maintech.de>
+ * Copyright (C) 2009 Gabor Juhos <juhosg@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
 
 #include <linux/kernel.h>
 #include <linux/slab.h>
+#include <linux/vmalloc.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
-#include <linux/bootmem.h>
-#include <linux/magic.h>
+
+struct cybertan_header {
+       char    magic[4];
+       u8      res1[4];
+       char    fw_date[3];
+       char    fw_ver[3];
+       char    id[4];
+       char    hw_ver;
+       char    unused;
+       u8      flags[2];
+       u8      res2[10];
+};
 
 #define TRX_PARTS      6
 #define TRX_MAGIC      0x30524448
@@ -58,91 +70,117 @@ struct uimage_header {
        uint8_t         ih_name[IH_NMLEN];      /* Image Name */
 };
 
+struct wrt160nl_header {
+       struct cybertan_header  cybertan;
+       struct trx_header       trx;
+       struct uimage_header    uimage;
+} __attribute__ ((packed));
+
 static struct mtd_partition trx_parts[TRX_PARTS];
 
-static int create_mtd_partitions(struct mtd_info *master,
-                                struct mtd_partition **pparts,
-                                unsigned long origin)
+static int wrt160nl_parse_partitions(struct mtd_info *master,
+                                    struct mtd_partition **pparts,
+                                    unsigned long origin)
 {
-       uint8_t buf[512];
-       int len;
-       struct trx_header *header;
+       struct wrt160nl_header *header;
+       struct trx_header *theader;
        struct uimage_header *uheader;
+       size_t retlen;
        unsigned int kernel_len;
+       int ret;
+
+       header = vmalloc(sizeof(*header));
+       if (!header) {
+               return -ENOMEM;
+               goto out;
+       }
+
+       ret = master->read(master, 4 * master->erasesize, sizeof(*header),
+                          &retlen, (void *) header);
+       if (ret)
+               goto free_hdr;
 
-       master->read(master, 4 * master->erasesize, sizeof(buf), &len, buf);
-       if (strncmp(buf, "NL16", 4) == 0) {
-               printk(KERN_INFO "TRX on WRT160NL detected\n");
+       if (retlen != sizeof(*header)) {
+               ret = -EIO;
+               goto free_hdr;
+       }
 
-               header = (struct trx_header *)(buf + 32);
-               if (le32_to_cpu(header->magic) != TRX_MAGIC) {
-                       printk(KERN_WARNING "TRX messed up\n");
-                       return 0;
-               }
+       if (strncmp(header->cybertan.magic, "NL16", 4) != 0) {
+               printk(KERN_NOTICE "%s: no WRT160NL signature found\n",
+                       master->name);
+               goto free_hdr;
+       }
 
-               uheader = (struct uimage_header *)(buf + 60);
-               if (uheader->ih_magic != IH_MAGIC) {
-                       printk(KERN_WARNING "uImage messed up\n");
-                       return 0;
-               }
+       theader = &header->trx;
+       if (le32_to_cpu(theader->magic) != TRX_MAGIC) {
+               printk(KERN_NOTICE "%s: no TRX header found\n", master->name);
+               goto free_hdr;
+       }
 
-               kernel_len = uheader->ih_size / master->erasesize;
-               if (uheader->ih_size % master->erasesize)
-                       kernel_len++;
+       uheader = &header->uimage;
+       if (uheader->ih_magic != IH_MAGIC) {
+               printk(KERN_NOTICE "%s: no uImage found\n", master->name);
+               goto free_hdr;
+       }
 
+       kernel_len = uheader->ih_size / master->erasesize;
+       if (uheader->ih_size % master->erasesize)
                kernel_len++;
-               kernel_len *= master->erasesize;
-
-               trx_parts[0].name = "u-boot";
-               trx_parts[0].offset = 0;
-               trx_parts[0].size = 4 * master->erasesize;
-               trx_parts[0].mask_flags = MTD_WRITEABLE;
-
-               trx_parts[1].name = "kernel";
-               trx_parts[1].offset = trx_parts[0].offset + trx_parts[0].size;
-               trx_parts[1].size = kernel_len;
-               trx_parts[1].mask_flags = 0;
-
-               trx_parts[2].name = "rootfs";
-               trx_parts[2].offset = trx_parts[1].offset + trx_parts[1].size;
-               trx_parts[2].size = master->size - 6 * master->erasesize - trx_parts[1].size;
-               trx_parts[2].mask_flags = 0;
-
-               trx_parts[3].name = "nvram";
-               trx_parts[3].offset = master->size - 2 * master->erasesize;
-               trx_parts[3].size = master->erasesize;
-               trx_parts[3].mask_flags = MTD_WRITEABLE;
-
-               trx_parts[4].name = "art";
-               trx_parts[4].offset = master->size - master->erasesize;
-               trx_parts[4].size = master->erasesize;
-               trx_parts[4].mask_flags = MTD_WRITEABLE;
-
-               trx_parts[5].name = "firmware";
-               trx_parts[5].offset = 4 * master->erasesize;
-               trx_parts[5].size = master->size - 6 * master->erasesize;
-               trx_parts[5].mask_flags = 0;
-
-               *pparts = trx_parts;
-
-               return TRX_PARTS;
-       } else {
-               return 0;
-       }
+
+       kernel_len++;
+       kernel_len *= master->erasesize;
+
+       trx_parts[0].name = "u-boot";
+       trx_parts[0].offset = 0;
+       trx_parts[0].size = 4 * master->erasesize;
+       trx_parts[0].mask_flags = MTD_WRITEABLE;
+
+       trx_parts[1].name = "kernel";
+       trx_parts[1].offset = trx_parts[0].offset + trx_parts[0].size;
+       trx_parts[1].size = kernel_len;
+       trx_parts[1].mask_flags = 0;
+
+       trx_parts[2].name = "rootfs";
+       trx_parts[2].offset = trx_parts[1].offset + trx_parts[1].size;
+       trx_parts[2].size = master->size - 6 * master->erasesize - trx_parts[1].size;
+       trx_parts[2].mask_flags = 0;
+
+       trx_parts[3].name = "nvram";
+       trx_parts[3].offset = master->size - 2 * master->erasesize;
+       trx_parts[3].size = master->erasesize;
+       trx_parts[3].mask_flags = MTD_WRITEABLE;
+
+       trx_parts[4].name = "art";
+       trx_parts[4].offset = master->size - master->erasesize;
+       trx_parts[4].size = master->erasesize;
+       trx_parts[4].mask_flags = MTD_WRITEABLE;
+
+       trx_parts[5].name = "firmware";
+       trx_parts[5].offset = 4 * master->erasesize;
+       trx_parts[5].size = master->size - 6 * master->erasesize;
+       trx_parts[5].mask_flags = 0;
+
+       *pparts = trx_parts;
+       ret = TRX_PARTS;
+
+ free_hdr:
+       vfree(header);
+ out:
+       return ret;
 }
 
-static struct mtd_part_parser trx_parser = {
+static struct mtd_part_parser wrt160nl_parser = {
        .owner          = THIS_MODULE,
-       .parse_fn       = create_mtd_partitions,
+       .parse_fn       = wrt160nl_parse_partitions,
        .name           = "wrt160nl",
 };
 
-static int __init trx_parser_init(void)
+static int __init wrt160nl_parser_init(void)
 {
-       return register_mtd_parser(&trx_parser);
+       return register_mtd_parser(&wrt160nl_parser);
 }
 
-module_init(trx_parser_init);
+module_init(wrt160nl_parser_init);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Christian Daniel <cd@maintech.de>");