target/linux/lantiq/patches-4.4/0007-MIPS-lantiq-add-basic-tffs-driver.patch

   1 From d27ec8bb97db0f60d81ab255d51ac4e967362067 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Thu, 7 Aug 2014 18:34:19 +0200
   4 Subject: [PATCH 07/36] MIPS: lantiq: add basic tffs driver
   5
   6 Signed-off-by: John Crispin <blogic@openwrt.org>
   7 ---
   8  arch/mips/lantiq/xway/Makefile |    2 +-
   9  arch/mips/lantiq/xway/tffs.c   |   87 ++++++++++++++++++++++++++++++++++++++++
  10  2 files changed, 88 insertions(+), 1 deletion(-)
  11  create mode 100644 arch/mips/lantiq/xway/tffs.c
  12
  13 --- a/arch/mips/lantiq/xway/Makefile
  14 +++ b/arch/mips/lantiq/xway/Makefile
  15 @@ -1,5 +1,5 @@
  16  obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o dcdc.o
  17
  18 -obj-y += vmmc.o
  19 +obj-y += vmmc.o tffs.o
  20
  21  obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
  22 --- /dev/null
  23 +++ b/arch/mips/lantiq/xway/tffs.c
  24 @@ -0,0 +1,87 @@
  25 +#include <linux/module.h>
  26 +#include <linux/mtd/mtd.h>
  27 +#include <linux/errno.h>
  28 +#include <linux/slab.h>
  29 +
  30 +struct tffs_entry {
  31 +    uint16_t id;
  32 +    uint16_t len;
  33 +};
  34 +
  35 +static struct tffs_id {
  36 +       uint32_t id;
  37 +       char *name;
  38 +       unsigned char *val;
  39 +       uint32_t offset;
  40 +       uint32_t len;
  41 +} ids[] = {
  42 +       { 0x01A9, "annex" },
  43 +       { 0x0188, "maca" },
  44 +       { 0x0189, "macb" },
  45 +       { 0x018a, "macwlan" },
  46 +       { 0x0195, "macwlan2" },
  47 +       { 0x018b, "macdsl" },
  48 +       { 0x01C2, "webgui_pass" },
  49 +       { 0x01AB, "wlan_key" },
  50 +};
  51 +
  52 +static struct mtd_info *tffs1, *tffs2;
  53 +
  54 +static struct tffs_id* tffs_find_id(int id)
  55 +{
  56 +       int i;
  57 +
  58 +       for (i = 0; i < ARRAY_SIZE(ids); i++)
  59 +               if (id == ids[i].id)
  60 +                       return &ids[i];
  61 +
  62 +       return NULL;
  63 +}
  64 +
  65 +static void tffs_index(void)
  66 +{
  67 +       struct tffs_entry *E = NULL;
  68 +       struct tffs_entry entry;
  69 +       int ret, retlen;
  70 +
  71 +       while ((unsigned int) E + sizeof(struct tffs_entry) < tffs2->size) {
  72 +               struct tffs_id *id;
  73 +               int len;
  74 +
  75 +               ret = mtd_read(tffs2, (unsigned int) E, sizeof(struct tffs_entry), &retlen, (unsigned char *)&entry);
  76 +               if (ret)
  77 +                       return;
  78 +
  79 +               if (entry.id == 0xffff)
  80 +                       return;
  81 +
  82 +               id = tffs_find_id(entry.id);
  83 +               if (id) {
  84 +                       id->offset = (uint32_t) E;
  85 +                       id->len = entry.len;
  86 +                       id->val = kzalloc(entry.len + 1, GFP_KERNEL);
  87 +                       mtd_read(tffs2, ((unsigned int) E) + sizeof(struct tffs_entry), entry.len, &retlen, id->val);
  88 +
  89 +               }
  90 +               //printk(KERN_INFO "found entry at 0x%08X-> [<0x%x> %u bytes]\n", (uint32_t) E, entry.id, entry.len);
  91 +               if (id && id->name)
  92 +                       printk(KERN_INFO "found entry name -> %s=%s\n", id->name, id->val);
  93 +
  94 +               len = (entry.len + 3) & ~0x03;
  95 +               E = (struct tffs_entry *)(((unsigned int)E) + sizeof(struct tffs_entry) + len);
  96 +       }
  97 +}
  98 +
  99 +static int __init tffs_init(void)
 100 +{
 101 +       tffs1 = get_mtd_device_nm("tffs (1)");
 102 +       tffs2 = get_mtd_device_nm("tffs (2)");
 103 +       if (IS_ERR(tffs1) || IS_ERR(tffs2))
 104 +               return -1;
 105 +
 106 +       tffs_index();
 107 +
 108 +       return 0;
 109 +}
 110 +late_initcall(tffs_init);
 111 +