linux-kernel - [PATCH v4 3/5] Bluetooth: btusb: mediatek: refactor the function btusb_mtk

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Message-Id: <457c7be3bbbeda1241e097e99056d9c5e2a734bb.1715109394.git.sean.wang@kernel.org>
Date: Tue,  7 May 2024 12:21:59 -0700
From: sean.wang@...nel.org
To: marcel@...tmann.org,
	johan.hedberg@...il.com,
	luiz.dentz@...il.com
Cc: linux-bluetooth@...r.kernel.org,
	linux-mediatek@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Hao Qin <hao.qin@...iatek.com>,
	Sean Wang <sean.wang@...iatek.com>
Subject: [PATCH v4 3/5] Bluetooth: btusb: mediatek: refactor the function btusb_mtk_reset

From: Hao Qin <hao.qin@...iatek.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@...iatek.com>
Signed-off-by: Sean Wang <sean.wang@...iatek.com>
Signed-off-by: Hao Qin <hao.qin@...iatek.com>
---
v3: refine the git message
v4: rebase onto the latest code
---
 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 1603e97f0d7c..76c52f2fe917 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