ath10k: add cal_data debugfs file

Provide calibration data used by the firmware to user space via a debugfs file.
This makes it easier to debug calibration related problems.

Example:

sudo cp /sys/kernel/debug/ieee80211/phy0/ath10k/cal_data 1.cal

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index 5e001de..22b4888 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -23,6 +23,7 @@
 
 #include "core.h"
 #include "debug.h"
+#include "hif.h"
 
 /* ms */
 #define ATH10K_DEBUG_HTT_STATS_INTERVAL 1000
@@ -1041,6 +1042,84 @@ static const struct file_operations fops_fw_dbglog = {
        .llseek = default_llseek,
 };
 
+static int ath10k_debug_cal_data_open(struct inode *inode, struct file *file)
+{
+       struct ath10k *ar = inode->i_private;
+       void *buf;
+       u32 hi_addr;
+       __le32 addr;
+       int ret;
+
+       mutex_lock(&ar->conf_mutex);
+
+       if (ar->state != ATH10K_STATE_ON &&
+           ar->state != ATH10K_STATE_UTF) {
+               ret = -ENETDOWN;
+               goto err;
+       }
+
+       buf = vmalloc(QCA988X_CAL_DATA_LEN);
+       if (!buf) {
+               ret = -ENOMEM;
+               goto err;
+       }
+
+       hi_addr = host_interest_item_address(HI_ITEM(hi_board_data));
+
+       ret = ath10k_hif_diag_read(ar, hi_addr, &addr, sizeof(addr));
+       if (ret) {
+               ath10k_warn(ar, "failed to read hi_board_data address: %d\n", ret);
+               goto err_vfree;
+       }
+
+       ret = ath10k_hif_diag_read(ar, le32_to_cpu(addr), buf,
+                                  QCA988X_CAL_DATA_LEN);
+       if (ret) {
+               ath10k_warn(ar, "failed to read calibration data: %d\n", ret);
+               goto err_vfree;
+       }
+
+       file->private_data = buf;
+
+       mutex_unlock(&ar->conf_mutex);
+
+       return 0;
+
+err_vfree:
+       vfree(buf);
+
+err:
+       mutex_unlock(&ar->conf_mutex);
+
+       return ret;
+}
+
+static ssize_t ath10k_debug_cal_data_read(struct file *file,
+                                         char __user *user_buf,
+                                         size_t count, loff_t *ppos)
+{
+       void *buf = file->private_data;
+
+       return simple_read_from_buffer(user_buf, count, ppos,
+                                      buf, QCA988X_CAL_DATA_LEN);
+}
+
+static int ath10k_debug_cal_data_release(struct inode *inode,
+                                        struct file *file)
+{
+       vfree(file->private_data);
+
+       return 0;
+}
+
+static const struct file_operations fops_cal_data = {
+       .open = ath10k_debug_cal_data_open,
+       .read = ath10k_debug_cal_data_read,
+       .release = ath10k_debug_cal_data_release,
+       .owner = THIS_MODULE,
+       .llseek = default_llseek,
+};
+
 int ath10k_debug_start(struct ath10k *ar)
 {
        int ret;
@@ -1214,6 +1293,9 @@ int ath10k_debug_register(struct ath10k *ar)
        debugfs_create_file("fw_dbglog", S_IRUSR, ar->debug.debugfs_phy,
                            ar, &fops_fw_dbglog);
 
+       debugfs_create_file("cal_data", S_IRUSR, ar->debug.debugfs_phy,
+                           ar, &fops_cal_data);
+
        if (config_enabled(CONFIG_ATH10K_DFS_CERTIFIED)) {
                debugfs_create_file("dfs_simulate_radar", S_IWUSR,
                                    ar->debug.debugfs_phy, ar,

diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 3cf5702..006a9cb 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -43,6 +43,8 @@
 
 #define REG_DUMP_COUNT_QCA988X 60
 
+#define QCA988X_CAL_DATA_LEN           2116
+
 struct ath10k_fw_ie {
        __le32 id;
        __le32 len;