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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>
This commit is contained in:
Rajkumar Manoharan 2011-08-13 10:28:18 +05:30 committed by John W. Linville
parent e338a85e21
commit d069a46be8
1 changed files with 55 additions and 0 deletions
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55
drivers/net/wireless/ath/ath9k/debug.c
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@ -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,