mac80211: backport latest version from trunk as of r27395
[openwrt-10.03/.git] / package / mac80211 / patches / 500-ath9k_eeprom_debugfs.patch
1 --- a/drivers/net/wireless/ath/ath9k/debug.c
2 +++ b/drivers/net/wireless/ath/ath9k/debug.c
3 @@ -1181,6 +1181,53 @@ static const struct file_operations fops
4         .llseek = default_llseek,/* read accesses f_pos */
5  };
6  
7 +static ssize_t read_file_eeprom(struct file *file, char __user *user_buf,
8 +                            size_t count, loff_t *ppos)
9 +{
10 +       struct ath_softc *sc = file->private_data;
11 +       struct ath_hw *ah = sc->sc_ah;
12 +       struct ath_common *common = ath9k_hw_common(ah);
13 +       int bytes = 0;
14 +       int pos = *ppos;
15 +       int size = 4096;
16 +       u16 val;
17 +       int i;
18 +
19 +       if (AR_SREV_9300_20_OR_LATER(ah))
20 +               size = 16384;
21 +
22 +       if (*ppos < 0)
23 +               return -EINVAL;
24 +
25 +       if (count > size - *ppos)
26 +               count = size - *ppos;
27 +
28 +       for (i = *ppos / 2; count > 0; count -= bytes, *ppos += bytes, i++) {
29 +               void *from = &val;
30 +
31 +               if (!common->bus_ops->eeprom_read(common, i, &val))
32 +                       val = 0xffff;
33 +
34 +               if (*ppos % 2) {
35 +                       from++;
36 +                       bytes = 1;
37 +               } else if (count == 1) {
38 +                       bytes = 1;
39 +               } else {
40 +                       bytes = 2;
41 +               }
42 +               copy_to_user(user_buf, from, bytes);
43 +               user_buf += bytes;
44 +       }
45 +       return *ppos - pos;
46 +}
47 +
48 +static const struct file_operations fops_eeprom = {
49 +       .read = read_file_eeprom,
50 +       .open = ath9k_debugfs_open,
51 +       .owner = THIS_MODULE
52 +};
53 +
54  int ath9k_init_debug(struct ath_hw *ah)
55  {
56         struct ath_common *common = ath9k_hw_common(ah);
57 @@ -1231,6 +1278,9 @@ int ath9k_init_debug(struct ath_hw *ah)
58         debugfs_create_u32("gpio_val", S_IRUSR | S_IWUSR,
59                            sc->debug.debugfs_phy, &sc->sc_ah->gpio_val);
60  
61 +       debugfs_create_file("eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
62 +                           &fops_eeprom);
63 +
64         sc->debug.regidx = 0;
65         return 0;
66  }