diff mbox series

[v4] bluetooth: hci_qca: Fix qca6390 enable failure after warm reboot

Message ID 1590644248-9373-1-git-send-email-zijuhu@codeaurora.org (mailing list archive)
State New, archived
Delegated to: Marcel Holtmann
Headers show
Series [v4] bluetooth: hci_qca: Fix qca6390 enable failure after warm reboot | expand

Commit Message

Zijun Hu May 28, 2020, 5:37 a.m. UTC
Warm reboot can not restore qca6390 controller baudrate
to default due to lack of controllable BT_EN pin or power
supply, so fails to download firmware after warm reboot.

Fixed by sending EDL_SOC_RESET VSC to reset controller
within added device shutdown implementation.

Signed-off-by: Zijun Hu <zijuhu@codeaurora.org>
---
 drivers/bluetooth/hci_qca.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

Comments

Marcel Holtmann May 28, 2020, 8:19 a.m. UTC | #1
Hi Zijun,

> Warm reboot can not restore qca6390 controller baudrate
> to default due to lack of controllable BT_EN pin or power
> supply, so fails to download firmware after warm reboot.
> 
> Fixed by sending EDL_SOC_RESET VSC to reset controller
> within added device shutdown implementation.
> 
> Signed-off-by: Zijun Hu <zijuhu@codeaurora.org>
> ---
> drivers/bluetooth/hci_qca.c | 33 +++++++++++++++++++++++++++++++++
> 1 file changed, 33 insertions(+)
> 
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index e4a6823..8e03bfe 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -1975,6 +1975,38 @@ static void qca_serdev_remove(struct serdev_device *serdev)
> 	hci_uart_unregister_device(&qcadev->serdev_hu);
> }
> 
> +static void qca_serdev_shutdown(struct device *dev)
> +{
> +	int ret;
> +	int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
> +	struct serdev_device *serdev = to_serdev_device(dev);
> +	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
> +	const u8 ibs_wake_cmd[] = { 0xFD };
> +	const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };

struct hci_dev *hdev = container_of(dev, struct hci_dev, dev);

> +
> +	if (qcadev->btsoc_type == QCA_QCA6390) {
> +		serdev_device_write_flush(serdev);
> +		ret = serdev_device_write_buf(serdev,
> +				ibs_wake_cmd, sizeof(ibs_wake_cmd));
> +		if (ret < 0) {
> +			BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);

And then use bt_dev_err here.

> +			return;
> +		}
> +		serdev_device_wait_until_sent(serdev, timeout);
> +		usleep_range(8000, 10000);
> +
> +		serdev_device_write_flush(serdev);
> +		ret = serdev_device_write_buf(serdev,
> +				edl_reset_soc_cmd, sizeof(edl_reset_soc_cmd));
> +		if (ret < 0) {
> +			BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
> +			return;
> +		}
> +		serdev_device_wait_until_sent(serdev, timeout);
> +		usleep_range(8000, 10000);
> +	}
> +}
> +
> static int __maybe_unused qca_suspend(struct device *dev)
> {
> 	struct hci_dev *hdev = container_of(dev, struct hci_dev, dev);
> @@ -2100,6 +2132,7 @@ static struct serdev_device_driver qca_serdev_driver = {
> 		.name = "hci_uart_qca",
> 		.of_match_table = of_match_ptr(qca_bluetooth_of_match),
> 		.acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
> +		.shutdown = qca_serdev_shutdown,
> 		.pm = &qca_pm_ops,
> 	},
> };

Regards

Marcel
Zijun Hu May 28, 2020, 9:18 a.m. UTC | #2
On 5/28/2020 4:19 PM, Marcel Holtmann wrote:
> Hi Zijun,
> 
>> Warm reboot can not restore qca6390 controller baudrate
>> to default due to lack of controllable BT_EN pin or power
>> supply, so fails to download firmware after warm reboot.
>>
>> Fixed by sending EDL_SOC_RESET VSC to reset controller
>> within added device shutdown implementation.
>>
>> Signed-off-by: Zijun Hu <zijuhu@codeaurora.org>
>> ---
>> drivers/bluetooth/hci_qca.c | 33 +++++++++++++++++++++++++++++++++
>> 1 file changed, 33 insertions(+)
>>
>> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
>> index e4a6823..8e03bfe 100644
>> --- a/drivers/bluetooth/hci_qca.c
>> +++ b/drivers/bluetooth/hci_qca.c
>> @@ -1975,6 +1975,38 @@ static void qca_serdev_remove(struct serdev_device *serdev)
>> 	hci_uart_unregister_device(&qcadev->serdev_hu);
>> }
>>
>> +static void qca_serdev_shutdown(struct device *dev)
>> +{
>> +	int ret;
>> +	int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
>> +	struct serdev_device *serdev = to_serdev_device(dev);
>> +	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
>> +	const u8 ibs_wake_cmd[] = { 0xFD };
>> +	const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };
> 
> struct hci_dev *hdev = container_of(dev, struct hci_dev, dev);
> no.
this dev is serdev_device not hci_dev
>> +
>> +	if (qcadev->btsoc_type == QCA_QCA6390) {
>> +		serdev_device_write_flush(serdev);
>> +		ret = serdev_device_write_buf(serdev,
>> +				ibs_wake_cmd, sizeof(ibs_wake_cmd));
>> +		if (ret < 0) {
>> +			BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);
> 
> And then use bt_dev_err here.
as explained above about dev, bt_dev_err is not a good selection at
this serdev_device shudown operation.
> 
>> +			return;
>> +		}
>> +		serdev_device_wait_until_sent(serdev, timeout);
>> +		usleep_range(8000, 10000);
>> +
>> +		serdev_device_write_flush(serdev);
>> +		ret = serdev_device_write_buf(serdev,
>> +				edl_reset_soc_cmd, sizeof(edl_reset_soc_cmd));
>> +		if (ret < 0) {
>> +			BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
>> +			return;
>> +		}
>> +		serdev_device_wait_until_sent(serdev, timeout);
>> +		usleep_range(8000, 10000);
>> +	}
>> +}
>> +
>> static int __maybe_unused qca_suspend(struct device *dev)
>> {
>> 	struct hci_dev *hdev = container_of(dev, struct hci_dev, dev);
>> @@ -2100,6 +2132,7 @@ static struct serdev_device_driver qca_serdev_driver = {
>> 		.name = "hci_uart_qca",
>> 		.of_match_table = of_match_ptr(qca_bluetooth_of_match),
>> 		.acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
>> +		.shutdown = qca_serdev_shutdown,
>> 		.pm = &qca_pm_ops,
>> 	},
>> };
> 
> Regards
> 
> Marcel
>
diff mbox series

Patch

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index e4a6823..8e03bfe 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1975,6 +1975,38 @@  static void qca_serdev_remove(struct serdev_device *serdev)
 	hci_uart_unregister_device(&qcadev->serdev_hu);
 }
 
+static void qca_serdev_shutdown(struct device *dev)
+{
+	int ret;
+	int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
+	struct serdev_device *serdev = to_serdev_device(dev);
+	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
+	const u8 ibs_wake_cmd[] = { 0xFD };
+	const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };
+
+	if (qcadev->btsoc_type == QCA_QCA6390) {
+		serdev_device_write_flush(serdev);
+		ret = serdev_device_write_buf(serdev,
+				ibs_wake_cmd, sizeof(ibs_wake_cmd));
+		if (ret < 0) {
+			BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);
+			return;
+		}
+		serdev_device_wait_until_sent(serdev, timeout);
+		usleep_range(8000, 10000);
+
+		serdev_device_write_flush(serdev);
+		ret = serdev_device_write_buf(serdev,
+				edl_reset_soc_cmd, sizeof(edl_reset_soc_cmd));
+		if (ret < 0) {
+			BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
+			return;
+		}
+		serdev_device_wait_until_sent(serdev, timeout);
+		usleep_range(8000, 10000);
+	}
+}
+
 static int __maybe_unused qca_suspend(struct device *dev)
 {
 	struct hci_dev *hdev = container_of(dev, struct hci_dev, dev);
@@ -2100,6 +2132,7 @@  static struct serdev_device_driver qca_serdev_driver = {
 		.name = "hci_uart_qca",
 		.of_match_table = of_match_ptr(qca_bluetooth_of_match),
 		.acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
+		.shutdown = qca_serdev_shutdown,
 		.pm = &qca_pm_ops,
 	},
 };