From: "hao.qin" <hao.qin@xxxxxxxxxxxx>
For MT7922, perform a reset before patch download to avoid
unexpected problems caused by inconsistency between upper layer
status and dongle status. Add USB reset retry to recover from
unexpected patch download failure.
Signed-off-by: hao.qin <hao.qin@xxxxxxxxxxxx>
---
drivers/bluetooth/btusb.c | 66 +++++++++++++++++++++++++++------------
1 file changed, 46 insertions(+), 20 deletions(-)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 0926e4451802..778e1a0d9cae 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2812,7 +2812,7 @@ static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
* WMT command.
*/
err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT,
- TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
+ TASK_INTERRUPTIBLE, HCI_CMD_TIMEOUT);
if (err == -EINTR) {
bt_dev_err(hdev, "Execution of wmt command interrupted");
clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
@@ -2994,28 +2994,22 @@ static u32 btusb_mtk_reset_done(struct hci_dev *hdev)
return val & MTK_BT_RST_DONE;
}
-static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
+static int btusb_mtk_subsys_reset(struct hci_dev *hdev, u32 dev_id)
{
struct btusb_data *data = hci_get_drvdata(hdev);
- struct btmediatek_data *mediatek;
u32 val;
int err;
- /* It's MediaTek specific bluetooth reset mechanism via USB */
- if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
- bt_dev_err(hdev, "last reset failed? Not resetting again");
- return -EBUSY;
- }
-
- err = usb_autopm_get_interface(data->intf);
- if (err < 0)
- return err;
-
- btusb_stop_traffic(data);
- usb_kill_anchored_urbs(&data->tx_anchor);
- mediatek = hci_get_priv(hdev);
-
- if (mediatek->dev_id == 0x7925) {
+ if (dev_id == 0x7922) {
+ btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+ val |= 0x00002020;
+ btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
+ btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
+ btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+ val |= (1 << 0);
+ btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
+ msleep(100);
+ } else if (dev_id == 0x7925) {
btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
val |= (1 << 5);
btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
@@ -3053,14 +3047,41 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
err = readx_poll_timeout(btusb_mtk_reset_done, hdev, val,
val & MTK_BT_RST_DONE, 20000, 1000000);
if (err < 0)
- bt_dev_err(hdev, "Reset timeout");
+ bt_dev_err(hdev, "Subsys reset timeout");
+
+ if (dev_id == 0x7922)
+ btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
btusb_mtk_id_get(data, 0x70010200, &val);
if (!val)
bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
- usb_queue_reset_device(data->intf);
+ return err;
+}
+
+static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
+{
+ struct btusb_data *data = hci_get_drvdata(hdev);
+ struct btmediatek_data *mediatek;
+ int err;
+
+ /* It's MediaTek specific bluetooth reset mechanism via USB */
+ if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
+ bt_dev_err(hdev, "last reset failed? Not resetting again");
+ return -EBUSY;
+ }
+
+ err = usb_autopm_get_interface(data->intf);
+ if (err < 0)
+ return err;
+
+ btusb_stop_traffic(data);
+ usb_kill_anchored_urbs(&data->tx_anchor);
+ mediatek = hci_get_priv(hdev);
+ err = btusb_mtk_subsys_reset(hdev, mediatek->dev_id);
+
+ usb_queue_reset_device(data->intf);
clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags);
return err;
@@ -3119,6 +3140,8 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
fwname = FIRMWARE_MT7668;
break;
case 0x7922:
+ btusb_mtk_subsys_reset(hdev, dev_id);
+ fallthrough;
case 0x7961:
case 0x7925:
if (dev_id == 0x7925)
@@ -3134,6 +3157,9 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
btusb_mtk_hci_wmt_sync);
if (err < 0) {
bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
+ btusb_stop_traffic(data);
+ usb_kill_anchored_urbs(&data->tx_anchor);
+ usb_queue_reset_device(data->intf);
return err;
}
--
2.18.0
