target/linux/lantiq/patches-3.10/0103-tffs.patch

   1 From e98005f02af333e0bf905a1e53caef009a37fc55 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Sun, 14 Jul 2013 22:26:43 +0200
   4 Subject: add basic tffs driver
   5
   6 ---
   7 --- a/arch/mips/lantiq/xway/Makefile
   8 +++ b/arch/mips/lantiq/xway/Makefile
   9 @@ -1,6 +1,6 @@
  10  obj-y := prom.o sysctrl.o clk.o reset.o dma.o timer.o dcdc.o
  11
  12 -obj-y += vmmc.o mtd_split.o
  13 +obj-y += vmmc.o mtd_split.o tffs.o
  14
  15  obj-$(CONFIG_PCI) += ath_eep.o rt_eep.o pci-ath-fixup.o
  16
  17 --- /dev/null
  18 +++ b/arch/mips/lantiq/xway/tffs.c
  19 @@ -0,0 +1,87 @@
  20 +#include <linux/module.h>
  21 +#include <linux/mtd/mtd.h>
  22 +#include <linux/errno.h>
  23 +#include <linux/slab.h>
  24 +
  25 +struct tffs_entry {
  26 +    uint16_t id;
  27 +    uint16_t len;
  28 +};
  29 +
  30 +static struct tffs_id {
  31 +       uint32_t id;
  32 +       char *name;
  33 +       unsigned char *val;
  34 +       uint32_t offset;
  35 +       uint32_t len;
  36 +} ids[] = {
  37 +       { 0x01A9, "annex" },
  38 +       { 0x0188, "maca" },
  39 +       { 0x0189, "macb" },
  40 +       { 0x018a, "macwlan" },
  41 +       { 0x0195, "macwlan2" },
  42 +       { 0x018b, "macdsl" },
  43 +       { 0x01C2, "webgui_pass" },
  44 +       { 0x01AB, "wlan_key" },
  45 +};
  46 +
  47 +static struct mtd_info *tffs1, *tffs2;
  48 +
  49 +static struct tffs_id* tffs_find_id(int id)
  50 +{
  51 +       int i;
  52 +
  53 +       for (i = 0; i < ARRAY_SIZE(ids); i++)
  54 +               if (id == ids[i].id)
  55 +                       return &ids[i];
  56 +
  57 +       return NULL;
  58 +}
  59 +
  60 +static void tffs_index(void)
  61 +{
  62 +       struct tffs_entry *E = NULL;
  63 +       struct tffs_entry entry;
  64 +       int ret, retlen;
  65 +
  66 +       while ((unsigned int) E + sizeof(struct tffs_entry) < tffs2->size) {
  67 +               struct tffs_id *id;
  68 +               int len;
  69 +
  70 +               ret = mtd_read(tffs2, (unsigned int) E, sizeof(struct tffs_entry), &retlen, (unsigned char *)&entry);
  71 +               if (ret)
  72 +                       return;
  73 +
  74 +               if (entry.id == 0xffff)
  75 +                       return;
  76 +
  77 +               id = tffs_find_id(entry.id);
  78 +               if (id) {
  79 +                       id->offset = (uint32_t) E;
  80 +                       id->len = entry.len;
  81 +                       id->val = kzalloc(entry.len + 1, GFP_KERNEL);
  82 +                       mtd_read(tffs2, ((unsigned int) E) + sizeof(struct tffs_entry), entry.len, &retlen, id->val);
  83 +
  84 +               }
  85 +               //printk(KERN_INFO "found entry at 0x%08X-> [<0x%x> %u bytes]\n", (uint32_t) E, entry.id, entry.len);
  86 +               if (id && id->name)
  87 +                       printk(KERN_INFO "found entry name -> %s=%s\n", id->name, id->val);
  88 +
  89 +               len = (entry.len + 3) & ~0x03;
  90 +               E = (struct tffs_entry *)(((unsigned int)E) + sizeof(struct tffs_entry) + len);
  91 +       }
  92 +}
  93 +
  94 +static int __init tffs_init(void)
  95 +{
  96 +       tffs1 = get_mtd_device_nm("tffs (1)");
  97 +       tffs2 = get_mtd_device_nm("tffs (2)");
  98 +       if (IS_ERR(tffs1) || IS_ERR(tffs2))
  99 +               return -1;
 100 +
 101 +       tffs_index();
 102 +
 103 +       return 0;
 104 +}
 105 +late_initcall(tffs_init);
 106 +