ath9k: Add a debugfs file for antenna diversity

Signed-off-by: Sujith Manoharan <c_manoha@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 87454f6..d8764ae 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -321,6 +321,68 @@ static const struct file_operations fops_ant_diversity = {
        .llseek = default_llseek,
 };
 
+static ssize_t read_file_antenna_diversity(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_hw_capabilities *pCap = &ah->caps;
+       struct ath_antenna_stats *as_main = &sc->debug.stats.ant_stats[ANT_MAIN];
+       struct ath_antenna_stats *as_alt = &sc->debug.stats.ant_stats[ANT_ALT];
+       unsigned int len = 0, size = 1024;
+       ssize_t retval = 0;
+       char *buf;
+
+       buf = kzalloc(size, GFP_KERNEL);
+       if (buf == NULL)
+               return -ENOMEM;
+
+       if (!(pCap->hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB)) {
+               len += snprintf(buf + len, size - len, "%s\n",
+                               "Antenna Diversity Combining is disabled");
+               goto exit;
+       }
+
+       len += snprintf(buf + len, size - len, "%30s%15s\n",
+                       "MAIN", "ALT");
+       len += snprintf(buf + len, size - len, "%-15s%15d%15d\n",
+                       "RECV CNT",
+                       as_main->recv_cnt,
+                       as_alt->recv_cnt);
+       len += snprintf(buf + len, size - len, "%-15s%15d%15d\n",
+                       "LNA1",
+                       as_main->lna_config_cnt[ATH_ANT_DIV_COMB_LNA1],
+                       as_alt->lna_config_cnt[ATH_ANT_DIV_COMB_LNA1]);
+       len += snprintf(buf + len, size - len, "%-15s%15d%15d\n",
+                       "LNA2",
+                       as_main->lna_config_cnt[ATH_ANT_DIV_COMB_LNA2],
+                       as_alt->lna_config_cnt[ATH_ANT_DIV_COMB_LNA2]);
+       len += snprintf(buf + len, size - len, "%-15s%15d%15d\n",
+                       "LNA1 + LNA2",
+                       as_main->lna_config_cnt[ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2],
+                       as_alt->lna_config_cnt[ATH_ANT_DIV_COMB_LNA1_PLUS_LNA2]);
+       len += snprintf(buf + len, size - len, "%-15s%15d%15d\n",
+                       "LNA1 - LNA2",
+                       as_main->lna_config_cnt[ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2],
+                       as_alt->lna_config_cnt[ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2]);
+exit:
+       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_antenna_diversity = {
+       .read = read_file_antenna_diversity,
+       .open = simple_open,
+       .owner = THIS_MODULE,
+       .llseek = default_llseek,
+};
+
 static ssize_t read_file_dma(struct file *file, char __user *user_buf,
                             size_t count, loff_t *ppos)
 {
@@ -1816,6 +1878,8 @@ int ath9k_init_debug(struct ath_hw *ah)
                           sc->debug.debugfs_phy, &sc->sc_ah->gpio_val);
        debugfs_create_file("diversity", S_IRUSR | S_IWUSR,
                            sc->debug.debugfs_phy, sc, &fops_ant_diversity);
+       debugfs_create_file("antenna_diversity", S_IRUSR,
+                           sc->debug.debugfs_phy, sc, &fops_antenna_diversity);
 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
        debugfs_create_file("btcoex", S_IRUSR, sc->debug.debugfs_phy, sc,
                            &fops_btcoex);