ath9k: Dump modal noisefloor calibration history
Debugfs file location:
<debugfs_mnt>/ieee80211/phy#/ath9k/dump_nfcal
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 9bec3b8..da45f32 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1163,6 +1163,59 @@
.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 @@
&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,