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>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 87454f6c7b4f..d8764ae3371e 100644
--- 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);