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Subject[PATCH v5 3/5] Bluetooth: btusb: mediatek: refactor the function btusb_mtk_reset
Date
From: Hao Qin <hao.qin@mediatek.com>

Extract the function btusb_mtk_subsys_reset from the btusb_mtk_reset
for the future handling of resetting bluetooth controller without
the USB reset.

Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Hao Qin <hao.qin@mediatek.com>
---
v3: refine the git message
v4: rebase onto the latest code
v5: no change
---
drivers/bluetooth/btusb.c | 45 +++++++++++++++++++++++----------------
1 file changed, 27 insertions(+), 18 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 611135d1ce01..602456e94fdb 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3033,28 +3033,13 @@ 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 == 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);
@@ -3098,8 +3083,32 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
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 *mtk_data;
+ 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);
+ mtk_data = hci_get_priv(hdev);
+
+ err = btusb_mtk_subsys_reset(hdev, mtk_data->dev_id);
+
+ usb_queue_reset_device(data->intf);
clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags);

return err;
--
2.25.1

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