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@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/debug.c | 82 +++++++++++++++++++++++++++++++
drivers/net/wireless/ath/ath10k/hw.h | 2 +
2 files changed, 84 insertions(+)
diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index 101c6f9cf2a8..f70c0aa59950 100644
--- 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
@@ -1037,6 +1038,84 @@ 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;
@@ -1210,6 +1289,9 @@ 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 3cf5702c1e7e..006a9cbc60b2 100644
--- 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;
--
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