@@ -53,6 +53,9 @@
/* Controller debug log header */
#define QCA_DEBUG_HANDLE 0x2EDC
+/* max retry count when init fails */
+#define QCA_MAX_INIT_RETRY_COUNT 3
+
enum qca_flags {
QCA_IBS_ENABLED,
QCA_DROP_VENDOR_EVENT,
@@ -1257,7 +1260,9 @@ static int qca_setup(struct hci_uart *hu)
{
struct hci_dev *hdev = hu->hdev;
struct qca_data *qca = hu->priv;
+ struct qca_serdev *qcadev;
unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
+ unsigned int init_retry_count = 0;
enum qca_btsoc_type soc_type = qca_soc_type(hu);
const char *firmware_name = qca_get_firmware_name(hu);
int ret;
@@ -1275,6 +1280,7 @@ static int qca_setup(struct hci_uart *hu)
*/
set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
+retry:
if (qca_is_wcn399x(soc_type)) {
bt_dev_info(hdev, "setting up wcn3990");
@@ -1293,6 +1299,12 @@ static int qca_setup(struct hci_uart *hu)
return ret;
} else {
bt_dev_info(hdev, "ROME setup");
+ if (hu->serdev) {
+ qcadev = serdev_device_get_drvdata(hu->serdev);
+ gpiod_set_value_cansleep(qcadev->bt_en, 1);
+ /* Controller needs time to bootup. */
+ msleep(150);
+ }
qca_set_speed(hu, QCA_INIT_SPEED);
}
@@ -1329,6 +1341,20 @@ static int qca_setup(struct hci_uart *hu)
* patch/nvm-config is found, so run with original fw/config.
*/
ret = 0;
+ } else {
+ if (init_retry_count < QCA_MAX_INIT_RETRY_COUNT) {
+ qca_power_off(hdev);
+ if (hu->serdev) {
+ serdev_device_close(hu->serdev);
+ ret = serdev_device_open(hu->serdev);
+ if (ret) {
+ bt_dev_err(hu->hdev, "open port fail");
+ return ret;
+ }
+ }
+ init_retry_count++;
+ goto retry;
+ }
}
/* Setup bdaddr */
This patch adds the retry of btsoc initialization when it fails. There are reports that the btsoc initialization may fail on some platforms but the repro ratio is very low. The failure may be caused by UART, platform HW or the btsoc itself but it's very difficlut to root cause, given the repro ratio is very low. Add a retry for the btsoc initialization will resolve most of the failures and make Bluetooth finally works. Signed-off-by: Rocky Liao <rjliao@codeaurora.org> --- Changes in v2: None drivers/bluetooth/hci_qca.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)