From d069a46be8ac745c193f2acc6071d9042b347224 Mon Sep 17 00:00:00 2001 From: Rajkumar Manoharan Date: Sat, 13 Aug 2011 10:28:18 +0530 Subject: [PATCH] ath9k: Dump modal noisefloor calibration history Debugfs file location: /ieee80211/phy#/ath9k/dump_nfcal Signed-off-by: Rajkumar Manoharan Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/debug.c | 55 ++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c index 9bec3b89fb68..da45f325be7d 100644 --- a/drivers/net/wireless/ath/ath9k/debug.c +++ b/drivers/net/wireless/ath/ath9k/debug.c @@ -1163,6 +1163,59 @@ static const struct file_operations fops_regdump = { .llseek = default_llseek,/* read accesses f_pos */ }; +static ssize_t read_file_dump_nfcal(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 ath9k_nfcal_hist *h = sc->caldata.nfCalHist; + struct ath_common *common = ath9k_hw_common(ah); + struct ieee80211_conf *conf = &common->hw->conf; + u32 len = 0, size = 1500; + u32 i, j; + ssize_t retval = 0; + char *buf; + u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask; + u8 nread; + + buf = kzalloc(size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + len += snprintf(buf + len, size - len, + "Channel Noise Floor : %d\n", ah->noise); + len += snprintf(buf + len, size - len, + "Chain | privNF | # Readings | NF Readings\n"); + for (i = 0; i < NUM_NF_READINGS; i++) { + if (!(chainmask & (1 << i)) || + ((i >= AR5416_MAX_CHAINS) && !conf_is_ht40(conf))) + continue; + + nread = AR_PHY_CCA_FILTERWINDOW_LENGTH - h[i].invalidNFcount; + len += snprintf(buf + len, size - len, " %d\t %d\t %d\t\t", + i, h[i].privNF, nread); + for (j = 0; j < nread; j++) + len += snprintf(buf + len, size - len, + " %d", h[i].nfCalBuffer[j]); + len += snprintf(buf + len, size - len, "\n"); + } + + if (len > size) + len = size; + + retval = simple_read_from_buffer(user_buf, count, ppos, buf, len); + kfree(buf); + + return retval; +} + +static const struct file_operations fops_dump_nfcal = { + .read = read_file_dump_nfcal, + .open = ath9k_debugfs_open, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + static ssize_t read_file_base_eeprom(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { @@ -1262,6 +1315,8 @@ int ath9k_init_debug(struct ath_hw *ah) &ah->config.cwm_ignore_extcca); debugfs_create_file("regdump", S_IRUSR, sc->debug.debugfs_phy, sc, &fops_regdump); + debugfs_create_file("dump_nfcal", S_IRUSR, sc->debug.debugfs_phy, sc, + &fops_dump_nfcal); debugfs_create_file("base_eeprom", S_IRUSR, sc->debug.debugfs_phy, sc, &fops_base_eeprom); debugfs_create_file("modal_eeprom", S_IRUSR, sc->debug.debugfs_phy, sc, -- 2.20.1