summaryrefslogtreecommitdiff
path: root/package/mac80211/patches/500-ath9k_eeprom_debugfs.patch
blob: cbece0b41d5d7aea20898a5a256b041bc42adb8c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1560,6 +1560,53 @@ static const struct file_operations fops
 
 #endif
 
+static ssize_t read_file_eeprom(struct file *file, char __user *user_buf,
+			     size_t count, loff_t *ppos)
+{
+	struct ath_softc *sc = file->private_data;
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+	int bytes = 0;
+	int pos = *ppos;
+	int size = 4096;
+	u16 val;
+	int i;
+
+	if (AR_SREV_9300_20_OR_LATER(ah))
+		size = 16384;
+
+	if (*ppos < 0)
+		return -EINVAL;
+
+	if (count > size - *ppos)
+		count = size - *ppos;
+
+	for (i = *ppos / 2; count > 0; count -= bytes, *ppos += bytes, i++) {
+		void *from = &val;
+
+		if (!common->bus_ops->eeprom_read(common, i, &val))
+			val = 0xffff;
+
+		if (*ppos % 2) {
+			from++;
+			bytes = 1;
+		} else if (count == 1) {
+			bytes = 1;
+		} else {
+			bytes = 2;
+		}
+		copy_to_user(user_buf, from, bytes);
+		user_buf += bytes;
+	}
+	return *ppos - pos;
+}
+
+static const struct file_operations fops_eeprom = {
+	.read = read_file_eeprom,
+	.open = ath9k_debugfs_open,
+	.owner = THIS_MODULE
+};
+
 int ath9k_init_debug(struct ath_hw *ah)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
@@ -1623,5 +1670,8 @@ int ath9k_init_debug(struct ath_hw *ah)
 	debugfs_create_u32("gpio_val", S_IRUSR | S_IWUSR,
 			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_val);
 
+	debugfs_create_file("eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
+			    &fops_eeprom);
+
 	return 0;
 }