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ath9k: add a patch for dumping the eeprom contents via debugfs

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SVN-Revision: 22870
This commit is contained in:
Felix Fietkau 2010-09-01 17:51:30 +00:00
parent 198730fb3d
commit ea70b60a07
1 changed files with 67 additions and 0 deletions
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67
package/mac80211/patches/540-ath9k_eeprom_debugfs.patch Normal file
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@ -0,0 +1,67 @@
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -897,6 +897,53 @@ static const struct file_operations fops
.owner = THIS_MODULE
};
+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);
@@ -960,6 +1007,10 @@ int ath9k_init_debug(struct ath_hw *ah)
sc->debug.debugfs_phy, &ah->config.cwm_ignore_extcca))
goto err;
+ if (!debugfs_create_file("eeprom", S_IRUSR,
+ sc->debug.debugfs_phy, sc, &fops_eeprom))
+ goto err;
+
sc->debug.regidx = 0;
return 0;
err: