--- a/drivers/net/wireless/ath/ath9k/debug.c +++ b/drivers/net/wireless/ath/ath9k/debug.c @@ -1413,6 +1413,54 @@ void ath9k_deinit_debug(struct ath_softc ath9k_cmn_spectral_deinit_debug(&sc->spec_priv); } +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; + } + if (copy_to_user(user_buf, from, bytes)) + return -EFAULT; + user_buf += bytes; + } + return *ppos - pos; +} + +static const struct file_operations fops_eeprom = { + .read = read_file_eeprom, + .open = simple_open, + .owner = THIS_MODULE +}; + int ath9k_init_debug(struct ath_hw *ah) { struct ath_common *common = ath9k_hw_common(ah); @@ -1432,6 +1479,8 @@ int ath9k_init_debug(struct ath_hw *ah) ath9k_tx99_init_debug(sc); ath9k_cmn_spectral_init_debug(&sc->spec_priv, sc->debug.debugfs_phy); + debugfs_create_file("eeprom", S_IRUSR, sc->debug.debugfs_phy, sc, + &fops_eeprom); debugfs_create_devm_seqfile(sc->dev, "dma", sc->debug.debugfs_phy, read_file_dma); debugfs_create_devm_seqfile(sc->dev, "interrupt", sc->debug.debugfs_phy,