package/kernel/mac80211/patches/617-rt2x00-load-eeprom-on-SoC-from-a-mtd-device-defines-.patch

   1 From 339fe73f340161a624cc08e738d2244814852c3e Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Sun, 17 Mar 2013 00:55:04 +0100
   4 Subject: [PATCH] rt2x00: load eeprom on SoC from a mtd device defines inside
   5  OF
   6
   7 Signed-off-by: John Crispin <blogic@openwrt.org>
   8 ---
   9  drivers/net/wireless/rt2x00/Kconfig     |    1 +
  10  drivers/net/wireless/rt2x00/rt2800pci.c |   44 ++++++++++++++++++++++++++-----
  11  2 files changed, 39 insertions(+), 6 deletions(-)
  12
  13 --- a/drivers/net/wireless/rt2x00/Kconfig
  14 +++ b/drivers/net/wireless/rt2x00/Kconfig
  15 @@ -71,6 +71,7 @@ config RT2800PCI
  16         select RT2X00_LIB_FIRMWARE
  17         select RT2X00_LIB_EEPROM
  18         select RT2X00_LIB_CRYPTO
  19 +       select MTD if SOC_RT288X || SOC_RT305X
  20         depends on CRC_CCITT
  21         depends on EEPROM_93CX6
  22         ---help---
  23 --- a/drivers/net/wireless/rt2x00/rt2x00eeprom.c
  24 +++ b/drivers/net/wireless/rt2x00/rt2x00eeprom.c
  25 @@ -30,12 +30,77 @@
  26  #include "rt2x00.h"
  27  #include "rt2x00lib.h"
  28
  29 +#ifdef CONFIG_OF
  30 +#include <linux/of.h>
  31 +#include <linux/mtd/mtd.h>
  32 +#include <linux/mtd/partitions.h>
  33 +
  34 +static struct firmware mtd_fw;
  35 +
  36 +static int rt2800pci_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev)
  37 +{
  38 +       struct device_node *np = rt2x00dev->dev->of_node, *mtd_np = NULL;
  39 +       size_t retlen, len = rt2x00dev->ops->eeprom_size;
  40 +       int ret, size, offset = 0;
  41 +       struct mtd_info *mtd;
  42 +       const char *part;
  43 +       const __be32 *list;
  44 +       phandle phandle;
  45 +
  46 +       list = of_get_property(np, "ralink,mtd-eeprom", &size);
  47 +       if (!list) {
  48 +               dev_err(rt2x00dev->dev, "failed to load eeprom property\n");
  49 +               return -ENOENT;
  50 +       }
  51 +
  52 +       phandle = be32_to_cpup(list++);
  53 +       if (phandle)
  54 +               mtd_np = of_find_node_by_phandle(phandle);
  55 +       if (!mtd_np) {
  56 +               dev_err(rt2x00dev->dev, "failed to load mtd phandle\n");
  57 +               return -EINVAL;
  58 +       }
  59 +
  60 +       part = of_get_property(mtd_np, "label", NULL);
  61 +       if (!part)
  62 +               part = mtd_np->name;
  63 +
  64 +       mtd = get_mtd_device_nm(part);
  65 +       if (IS_ERR(mtd)) {
  66 +               dev_err(rt2x00dev->dev, "failed to get mtd device \"%s\"\n", part);
  67 +               return PTR_ERR(mtd);
  68 +       }
  69 +
  70 +       if (size > sizeof(*list))
  71 +               offset = be32_to_cpup(list);
  72 +
  73 +       ret = mtd_read(mtd, offset, len, &retlen, (u_char *) rt2x00dev->eeprom);
  74 +       put_mtd_device(mtd);
  75 +
  76 +       if (!ret) {
  77 +               rt2x00dev->eeprom_file = &mtd_fw;
  78 +               mtd_fw.size = len;
  79 +               mtd_fw.data = rt2x00dev->eeprom;
  80 +       }
  81 +
  82 +       return ret;
  83 +}
  84 +#else
  85 +static inline int rt2800pci_read_eeprom_mtd(struct rt2x00_dev *rt2x00dev)
  86 +{
  87 +       return -EINVAL;
  88 +}
  89 +#endif
  90 +
  91  static int rt2x00lib_request_eeprom_file(struct rt2x00_dev *rt2x00dev)
  92  {
  93         const struct firmware *ee;
  94         char *ee_name;
  95         int retval;
  96
  97 +       if (!rt2800pci_read_eeprom_mtd(rt2x00dev))
  98 +               return 0;
  99 +
 100         ee_name = rt2x00dev->ops->lib->get_eeprom_file_name(rt2x00dev);
 101         if (!ee_name) {
 102                 rt2x00_err(rt2x00dev,