[PATCH v6 0/8] Bluetooth: btmtk: MediaTek ISO data transmission support

[PATCH v6 0/8] Bluetooth: btmtk: MediaTek ISO data transmission support

[Chris Lu]

Since SIG has not yet clearly defined the specification for ISO data
transmission over USB, MediaTek has adopted a method of adding an
additional interrupt endpoint for ISO data transmission. This approach
differs from the current method used in the Bluetooth upstream driver,
which utilizes existing bulk endpoints. The interrupt endpoint provides
guaranteed bandwidth, sufficient maximum data length for ISO packets
and error checking.

Driver sets up ISO interface and endpoints in btusb_mtk_setup and clears
the setup in btusb_mtk_shutdown. These flow can't move to btmtk.c due to
btusb_driver is only defined in btusb.c when claiming/relaesing interface.
Once ISO interface is claimed, driver can use specific interrupt endpoint
to send and receive iso data. ISO packet anchor stops when driver
suspending and resubmit interrupt urb for ISO data when driver resuming.

---
Change from v5 to v6:
fix test bot report error
-move usb.h declaration position to each c file.
-fix returned value in btmtk.h when returning a pointer.
-simplify commit message to avoid word number limitation.
---


Chris Lu (8):
  Bluetooth: btusb: mediatek: remove the unnecessary goto tag
  Bluetooth: btusb: mediatek: return error for failed reg access
  Bluetooth: btmtk: rename btmediatek_data
  Bluetooth: btusb: add callback function in btusb suspend/resume
  Bluetooth: btmtk: move btusb_mtk_hci_wmt_sync to btmtk.c
  Bluetooth: btmtk: move btusb_mtk_[setup, shutdown] to btmtk.c
  Bluetooth: btmtk: move btusb_recv_acl_mtk to btmtk.c
  Bluetooth: btusb: mediatek: add ISO data transmission functions

 drivers/bluetooth/btmtk.c     | 1059 ++++++++++++++++++++++++++++++++-
 drivers/bluetooth/btmtk.h     |   91 ++-
 drivers/bluetooth/btmtksdio.c |    1 +
 drivers/bluetooth/btmtkuart.c |    1 +
 drivers/bluetooth/btusb.c     |  751 +++--------------------
 5 files changed, 1219 insertions(+), 684 deletions(-)

-- 
2.18.0

[PATCH v6 1/8] Bluetooth: btusb: mediatek: remove the unnecessary goto tag

[Chris Lu]

Remove the unnecessary goto tag whether there is an error or not, we have
to free the buffer at the end of the function.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
---
 drivers/bluetooth/btusb.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 79aefdb3324d..fcdd660add19 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2953,12 +2953,9 @@ static int btusb_mtk_uhw_reg_write(struct btusb_data *data, u32 reg, u32 val)
 			      0x5E,
 			      reg >> 16, reg & 0xffff,
 			      buf, 4, USB_CTRL_SET_TIMEOUT);
-	if (err < 0) {
+	if (err < 0)
 		bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
-		goto err_free_buf;
-	}
 
-err_free_buf:
 	kfree(buf);
 
 	return err;
-- 
2.18.0

[PATCH v6 2/8] Bluetooth: btusb: mediatek: return error for failed reg access

[Chris Lu]

Update the code to immediately return an error code if accessing a
related register fails. This ensures that our desired logic for
subsequent register operations is maintained and allows us to promptly
catch any unexpected errors.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
---
 drivers/bluetooth/btusb.c | 114 ++++++++++++++++++++++++++++----------
 1 file changed, 84 insertions(+), 30 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index fcdd660add19..8239d9c891e6 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3037,47 +3037,98 @@ static int btusb_mtk_subsys_reset(struct hci_dev *hdev, u32 dev_id)
 	int err;
 
 	if (dev_id == 0x7922) {
-		btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+		err = btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+		if (err < 0)
+			return err;
 		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);
+		err = btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+		if (err < 0)
+			return err;
 		val |= BIT(0);
-		btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
+		err = btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
+		if (err < 0)
+			return err;
 		msleep(100);
 	} else if (dev_id == 0x7925) {
-		btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
+		err = btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
+		if (err < 0)
+			return err;
 		val |= (1 << 5);
-		btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
-		btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
+		err = btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
+		if (err < 0)
+			return err;
 		val &= 0xFFFF00FF;
+		if (err < 0)
+			return err;
 		val |= (1 << 13);
-		btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
-		btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
-		btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
+		err = btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
+		if (err < 0)
+			return err;
 		val |= (1 << 0);
-		btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
-		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
-		btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
-		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
-		btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
+		err = btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
+		if (err < 0)
+			return err;
 		msleep(100);
 	} else {
 		/* It's Device EndPoint Reset Option Register */
 		bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
-		btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
-		btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);
-
+		err = btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);
+		if (err < 0)
+			return err;
 		/* Reset the bluetooth chip via USB interface. */
-		btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
-		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
-		btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
-		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
-		btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
+		err = btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
+		if (err < 0)
+			return err;
 		/* MT7921 need to delay 20ms between toggle reset bit */
 		msleep(20);
-		btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
-		btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+		err = btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
+		if (err < 0)
+			return err;
+		err = btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+		if (err < 0)
+			return err;
 	}
 
 	err = readx_poll_timeout(btusb_mtk_reset_done, hdev, val,
@@ -3085,11 +3136,14 @@ static int btusb_mtk_subsys_reset(struct hci_dev *hdev, u32 dev_id)
 	if (err < 0)
 		bt_dev_err(hdev, "Reset timeout");
 
-	if (dev_id == 0x7922)
-		btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
+	if (dev_id == 0x7922) {
+		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
+		if (err < 0)
+			return err;
+	}
 
-	btusb_mtk_id_get(data, 0x70010200, &val);
-	if (!val)
+	err = btusb_mtk_id_get(data, 0x70010200, &val);
+	if (err < 0 || !val)
 		bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
 
 	return err;
-- 
2.18.0

[PATCH v6 3/8] Bluetooth: btmtk: rename btmediatek_data

[Chris Lu]

Rename btmediatek_data to have a consistent prefix throughout the driver.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
---
 drivers/bluetooth/btmtk.c | 10 +++++-----
 drivers/bluetooth/btmtk.h |  2 +-
 drivers/bluetooth/btusb.c |  9 ++++-----
 3 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
index a27c251bf56e..6489e4a63fb6 100644
--- a/drivers/bluetooth/btmtk.c
+++ b/drivers/bluetooth/btmtk.c
@@ -64,7 +64,7 @@ static void btmtk_coredump(struct hci_dev *hdev)
 
 static void btmtk_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb)
 {
-	struct btmediatek_data *data = hci_get_priv(hdev);
+	struct btmtk_data *data = hci_get_priv(hdev);
 	char buf[80];
 
 	snprintf(buf, sizeof(buf), "Controller Name: 0x%X\n",
@@ -85,7 +85,7 @@ static void btmtk_coredump_hdr(struct hci_dev *hdev, struct sk_buff *skb)
 
 static void btmtk_coredump_notify(struct hci_dev *hdev, int state)
 {
-	struct btmediatek_data *data = hci_get_priv(hdev);
+	struct btmtk_data *data = hci_get_priv(hdev);
 
 	switch (state) {
 	case HCI_DEVCOREDUMP_IDLE:
@@ -355,7 +355,7 @@ EXPORT_SYMBOL_GPL(btmtk_set_bdaddr);
 
 void btmtk_reset_sync(struct hci_dev *hdev)
 {
-	struct btmediatek_data *reset_work = hci_get_priv(hdev);
+	struct btmtk_data *reset_work = hci_get_priv(hdev);
 	int err;
 
 	hci_dev_lock(hdev);
@@ -371,7 +371,7 @@ EXPORT_SYMBOL_GPL(btmtk_reset_sync);
 int btmtk_register_coredump(struct hci_dev *hdev, const char *name,
 			    u32 fw_version)
 {
-	struct btmediatek_data *data = hci_get_priv(hdev);
+	struct btmtk_data *data = hci_get_priv(hdev);
 
 	if (!IS_ENABLED(CONFIG_DEV_COREDUMP))
 		return -EOPNOTSUPP;
@@ -387,7 +387,7 @@ EXPORT_SYMBOL_GPL(btmtk_register_coredump);
 
 int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb)
 {
-	struct btmediatek_data *data = hci_get_priv(hdev);
+	struct btmtk_data *data = hci_get_priv(hdev);
 	int err;
 
 	if (!IS_ENABLED(CONFIG_DEV_COREDUMP)) {
diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
index e76b8a358be8..dde6fbdeb2b3 100644
--- a/drivers/bluetooth/btmtk.h
+++ b/drivers/bluetooth/btmtk.h
@@ -135,7 +135,7 @@ struct btmtk_coredump_info {
 	int state;
 };
 
-struct btmediatek_data {
+struct btmtk_data {
 	u32 dev_id;
 	btmtk_reset_sync_func_t reset_sync;
 	struct btmtk_coredump_info cd_info;
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 8239d9c891e6..7612f10f9d39 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3152,7 +3152,7 @@ static int btusb_mtk_subsys_reset(struct hci_dev *hdev, u32 dev_id)
 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;
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
 	int err;
 
 	/* It's MediaTek specific bluetooth reset mechanism via USB */
@@ -3167,9 +3167,8 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
 
 	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);
+	err = btusb_mtk_subsys_reset(hdev, btmtk_data->dev_id);
 
 	usb_queue_reset_device(data->intf);
 	clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags);
@@ -3191,7 +3190,7 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 	char fw_bin_name[64];
 	u32 fw_version = 0, fw_flavor = 0;
 	u8 param;
-	struct btmediatek_data *mediatek;
+	struct btmtk_data *mediatek;
 
 	calltime = ktime_get();
 
@@ -4419,7 +4418,7 @@ static int btusb_probe(struct usb_interface *intf,
 		data->recv_event = btusb_recv_event_realtek;
 	} else if (id->driver_info & BTUSB_MEDIATEK) {
 		/* Allocate extra space for Mediatek device */
-		priv_size += sizeof(struct btmediatek_data);
+		priv_size += sizeof(struct btmtk_data);
 	}
 
 	data->recv_acl = hci_recv_frame;
-- 
2.18.0

[PATCH v6 4/8] Bluetooth: btusb: add callback function in btusb suspend/resume

[Chris Lu]

Add suspend/resum callback function in btusb_data which are reserved
for vendor specific usage during suspend/resume. hdev->suspend will be
added before stop traffic in btusb_suspend and hdev-> resume will be
added after resubmit urb in btusb_resume.

Signed-off-by: Chris Lu <chris.lu@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
 drivers/bluetooth/btusb.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 7612f10f9d39..4ec18b58dc68 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -891,6 +891,9 @@ struct btusb_data {
 
 	int (*setup_on_usb)(struct hci_dev *hdev);
 
+	int (*suspend)(struct hci_dev *hdev);
+	int (*resume)(struct hci_dev *hdev);
+
 	int oob_wake_irq;   /* irq for out-of-band wake-on-bt */
 	unsigned cmd_timeout_cnt;
 
@@ -4765,6 +4768,9 @@ static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
 
 	cancel_work_sync(&data->work);
 
+	if (data->suspend)
+		data->suspend(data->hdev);
+
 	btusb_stop_traffic(data);
 	usb_kill_anchored_urbs(&data->tx_anchor);
 
@@ -4868,6 +4874,9 @@ static int btusb_resume(struct usb_interface *intf)
 			btusb_submit_isoc_urb(hdev, GFP_NOIO);
 	}
 
+	if (data->resume)
+		data->resume(hdev);
+
 	spin_lock_irq(&data->txlock);
 	play_deferred(data);
 	clear_bit(BTUSB_SUSPENDING, &data->flags);
-- 
2.18.0

[PATCH v6 5/8] Bluetooth: btmtk: move btusb_mtk_hci_wmt_sync to btmtk.c

[Chris Lu]

Move btusb_mtk_hci_wmt_sync from btusb.c to btmtk.c which holds
vendor specific stuff and would make btusb.c clean.

Add usb.h header to btmtksdio.c/btmtkuart.c for usb related element
defined in btmtk.h

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
---
 drivers/bluetooth/btmtk.c     | 265 +++++++++++++++++++++++++++++++
 drivers/bluetooth/btmtk.h     |  31 ++++
 drivers/bluetooth/btmtksdio.c |   1 +
 drivers/bluetooth/btmtkuart.c |   1 +
 drivers/bluetooth/btusb.c     | 290 +---------------------------------
 5 files changed, 305 insertions(+), 283 deletions(-)

diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
index 6489e4a63fb6..3443a0837a86 100644
--- a/drivers/bluetooth/btmtk.c
+++ b/drivers/bluetooth/btmtk.c
@@ -4,6 +4,7 @@
  */
 #include <linux/module.h>
 #include <linux/firmware.h>
+#include <linux/usb.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -431,6 +432,270 @@ int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb)
 }
 EXPORT_SYMBOL_GPL(btmtk_process_coredump);
 
+static void btmtk_usb_wmt_recv(struct urb *urb)
+{
+	struct hci_dev *hdev = urb->context;
+	struct btmtk_data *data = hci_get_priv(hdev);
+	struct sk_buff *skb;
+	int err;
+
+	if (urb->status == 0 && urb->actual_length > 0) {
+		hdev->stat.byte_rx += urb->actual_length;
+
+		/* WMT event shouldn't be fragmented and the size should be
+		 * less than HCI_WMT_MAX_EVENT_SIZE.
+		 */
+		skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
+		if (!skb) {
+			hdev->stat.err_rx++;
+			kfree(urb->setup_packet);
+			return;
+		}
+
+		hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
+		skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
+
+		/* When someone waits for the WMT event, the skb is being cloned
+		 * and being processed the events from there then.
+		 */
+		if (test_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags)) {
+			data->evt_skb = skb_clone(skb, GFP_ATOMIC);
+			if (!data->evt_skb) {
+				kfree_skb(skb);
+				kfree(urb->setup_packet);
+				return;
+			}
+		}
+
+		err = hci_recv_frame(hdev, skb);
+		if (err < 0) {
+			kfree_skb(data->evt_skb);
+			data->evt_skb = NULL;
+			kfree(urb->setup_packet);
+			return;
+		}
+
+		if (test_and_clear_bit(BTMTK_TX_WAIT_VND_EVT,
+				       &data->flags)) {
+			/* Barrier to sync with other CPUs */
+			smp_mb__after_atomic();
+			wake_up_bit(&data->flags,
+				    BTMTK_TX_WAIT_VND_EVT);
+		}
+		kfree(urb->setup_packet);
+		return;
+	} else if (urb->status == -ENOENT) {
+		/* Avoid suspend failed when usb_kill_urb */
+		return;
+	}
+
+	usb_mark_last_busy(data->udev);
+
+	/* The URB complete handler is still called with urb->actual_length = 0
+	 * when the event is not available, so we should keep re-submitting
+	 * URB until WMT event returns, Also, It's necessary to wait some time
+	 * between the two consecutive control URBs to relax the target device
+	 * to generate the event. Otherwise, the WMT event cannot return from
+	 * the device successfully.
+	 */
+	udelay(500);
+
+	usb_anchor_urb(urb, data->ctrl_anchor);
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err < 0) {
+		kfree(urb->setup_packet);
+		/* -EPERM: urb is being killed;
+		 * -ENODEV: device got disconnected
+		 */
+		if (err != -EPERM && err != -ENODEV)
+			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
+				   urb, -err);
+		usb_unanchor_urb(urb);
+	}
+}
+
+static int btmtk_usb_submit_wmt_recv_urb(struct hci_dev *hdev)
+{
+	struct btmtk_data *data = hci_get_priv(hdev);
+	struct usb_ctrlrequest *dr;
+	unsigned char *buf;
+	int err, size = 64;
+	unsigned int pipe;
+	struct urb *urb;
+
+	urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!urb)
+		return -ENOMEM;
+
+	dr = kmalloc(sizeof(*dr), GFP_KERNEL);
+	if (!dr) {
+		usb_free_urb(urb);
+		return -ENOMEM;
+	}
+
+	dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
+	dr->bRequest     = 1;
+	dr->wIndex       = cpu_to_le16(0);
+	dr->wValue       = cpu_to_le16(48);
+	dr->wLength      = cpu_to_le16(size);
+
+	buf = kmalloc(size, GFP_KERNEL);
+	if (!buf) {
+		kfree(dr);
+		usb_free_urb(urb);
+		return -ENOMEM;
+	}
+
+	pipe = usb_rcvctrlpipe(data->udev, 0);
+
+	usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
+			     buf, size, btmtk_usb_wmt_recv, hdev);
+
+	urb->transfer_flags |= URB_FREE_BUFFER;
+
+	usb_anchor_urb(urb, data->ctrl_anchor);
+	err = usb_submit_urb(urb, GFP_KERNEL);
+	if (err < 0) {
+		if (err != -EPERM && err != -ENODEV)
+			bt_dev_err(hdev, "urb %p submission failed (%d)",
+				   urb, -err);
+		usb_unanchor_urb(urb);
+	}
+
+	usb_free_urb(urb);
+
+	return err;
+}
+
+int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
+			   struct btmtk_hci_wmt_params *wmt_params)
+{
+	struct btmtk_data *data = hci_get_priv(hdev);
+	struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
+	u32 hlen, status = BTMTK_WMT_INVALID;
+	struct btmtk_hci_wmt_evt *wmt_evt;
+	struct btmtk_hci_wmt_cmd *wc;
+	struct btmtk_wmt_hdr *hdr;
+	int err;
+
+	/* Send the WMT command and wait until the WMT event returns */
+	hlen = sizeof(*hdr) + wmt_params->dlen;
+	if (hlen > 255)
+		return -EINVAL;
+
+	wc = kzalloc(hlen, GFP_KERNEL);
+	if (!wc)
+		return -ENOMEM;
+
+	hdr = &wc->hdr;
+	hdr->dir = 1;
+	hdr->op = wmt_params->op;
+	hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
+	hdr->flag = wmt_params->flag;
+	memcpy(wc->data, wmt_params->data, wmt_params->dlen);
+
+	set_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
+
+	/* WMT cmd/event doesn't follow up the generic HCI cmd/event handling,
+	 * it needs constantly polling control pipe until the host received the
+	 * WMT event, thus, we should require to specifically acquire PM counter
+	 * on the USB to prevent the interface from entering auto suspended
+	 * while WMT cmd/event in progress.
+	 */
+	err = usb_autopm_get_interface(data->intf);
+	if (err < 0)
+		goto err_free_wc;
+
+	err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
+
+	if (err < 0) {
+		clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
+		usb_autopm_put_interface(data->intf);
+		goto err_free_wc;
+	}
+
+	/* Submit control IN URB on demand to process the WMT event */
+	err = btmtk_usb_submit_wmt_recv_urb(hdev);
+
+	usb_autopm_put_interface(data->intf);
+
+	if (err < 0)
+		goto err_free_wc;
+
+	/* The vendor specific WMT commands are all answered by a vendor
+	 * specific event and will have the Command Status or Command
+	 * Complete as with usual HCI command flow control.
+	 *
+	 * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
+	 * state to be cleared. The driver specific event receive routine
+	 * will clear that state and with that indicate completion of the
+	 * WMT command.
+	 */
+	err = wait_on_bit_timeout(&data->flags, BTMTK_TX_WAIT_VND_EVT,
+				  TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
+	if (err == -EINTR) {
+		bt_dev_err(hdev, "Execution of wmt command interrupted");
+		clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
+		goto err_free_wc;
+	}
+
+	if (err) {
+		bt_dev_err(hdev, "Execution of wmt command timed out");
+		clear_bit(BTMTK_TX_WAIT_VND_EVT, &data->flags);
+		err = -ETIMEDOUT;
+		goto err_free_wc;
+	}
+
+	if (data->evt_skb == NULL)
+		goto err_free_wc;
+
+	/* Parse and handle the return WMT event */
+	wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
+	if (wmt_evt->whdr.op != hdr->op) {
+		bt_dev_err(hdev, "Wrong op received %d expected %d",
+			   wmt_evt->whdr.op, hdr->op);
+		err = -EIO;
+		goto err_free_skb;
+	}
+
+	switch (wmt_evt->whdr.op) {
+	case BTMTK_WMT_SEMAPHORE:
+		if (wmt_evt->whdr.flag == 2)
+			status = BTMTK_WMT_PATCH_UNDONE;
+		else
+			status = BTMTK_WMT_PATCH_DONE;
+		break;
+	case BTMTK_WMT_FUNC_CTRL:
+		wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
+		if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
+			status = BTMTK_WMT_ON_DONE;
+		else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
+			status = BTMTK_WMT_ON_PROGRESS;
+		else
+			status = BTMTK_WMT_ON_UNDONE;
+		break;
+	case BTMTK_WMT_PATCH_DWNLD:
+		if (wmt_evt->whdr.flag == 2)
+			status = BTMTK_WMT_PATCH_DONE;
+		else if (wmt_evt->whdr.flag == 1)
+			status = BTMTK_WMT_PATCH_PROGRESS;
+		else
+			status = BTMTK_WMT_PATCH_UNDONE;
+		break;
+	}
+
+	if (wmt_params->status)
+		*wmt_params->status = status;
+
+err_free_skb:
+	kfree_skb(data->evt_skb);
+	data->evt_skb = NULL;
+err_free_wc:
+	kfree(wc);
+	return err;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_hci_wmt_sync);
+
 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
 MODULE_AUTHOR("Mark Chen <mark-yw.chen@mediatek.com>");
 MODULE_DESCRIPTION("Bluetooth support for MediaTek devices ver " VERSION);
diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
index dde6fbdeb2b3..3055b9728ae2 100644
--- a/drivers/bluetooth/btmtk.h
+++ b/drivers/bluetooth/btmtk.h
@@ -28,6 +28,18 @@
 #define MTK_COREDUMP_END_LEN		(sizeof(MTK_COREDUMP_END))
 #define MTK_COREDUMP_NUM		255
 
+/* UHW CR mapping */
+#define MTK_BT_MISC		0x70002510
+#define MTK_BT_SUBSYS_RST	0x70002610
+#define MTK_UDMA_INT_STA_BT	0x74000024
+#define MTK_UDMA_INT_STA_BT1	0x74000308
+#define MTK_BT_WDT_STATUS	0x740003A0
+#define MTK_EP_RST_OPT		0x74011890
+#define MTK_EP_RST_IN_OUT_OPT	0x00010001
+#define MTK_BT_RST_DONE		0x00000100
+#define MTK_BT_RESET_REG_CONNV3	0x70028610
+#define MTK_BT_READ_DEV_ID	0x70010200
+
 enum {
 	BTMTK_WMT_PATCH_DWNLD = 0x1,
 	BTMTK_WMT_TEST = 0x2,
@@ -126,6 +138,10 @@ struct btmtk_hci_wmt_params {
 	u32 *status;
 };
 
+enum {
+	BTMTK_TX_WAIT_VND_EVT,
+};
+
 typedef int (*btmtk_reset_sync_func_t)(struct hci_dev *, void *);
 
 struct btmtk_coredump_info {
@@ -136,9 +152,15 @@ struct btmtk_coredump_info {
 };
 
 struct btmtk_data {
+	unsigned long flags;
 	u32 dev_id;
 	btmtk_reset_sync_func_t reset_sync;
 	struct btmtk_coredump_info cd_info;
+
+	struct usb_device *udev;
+	struct usb_interface *intf;
+	struct usb_anchor *ctrl_anchor;
+	struct sk_buff *evt_skb;
 };
 
 typedef int (*wmt_cmd_sync_func_t)(struct hci_dev *,
@@ -163,6 +185,9 @@ int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb);
 
 void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id, u32 fw_ver,
 			   u32 fw_flavor);
+
+int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
+			   struct btmtk_hci_wmt_params *wmt_params);
 #else
 
 static inline int btmtk_set_bdaddr(struct hci_dev *hdev,
@@ -202,4 +227,10 @@ static void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id,
 				  u32 fw_ver, u32 fw_flavor)
 {
 }
+
+static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
+				  struct btmtk_hci_wmt_params *wmt_params)
+{
+	return -EOPNOTSUPP;
+}
 #endif
diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index b4e560a17aa6..39d6898497a4 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -20,6 +20,7 @@
 #include <linux/of.h>
 #include <linux/pm_runtime.h>
 #include <linux/skbuff.h>
+#include <linux/usb.h>
 
 #include <linux/mmc/host.h>
 #include <linux/mmc/sdio_ids.h>
diff --git a/drivers/bluetooth/btmtkuart.c b/drivers/bluetooth/btmtkuart.c
index e6bc4a73c9fc..aa87c3e78871 100644
--- a/drivers/bluetooth/btmtkuart.c
+++ b/drivers/bluetooth/btmtkuart.c
@@ -22,6 +22,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/serdev.h>
 #include <linux/skbuff.h>
+#include <linux/usb.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 4ec18b58dc68..660e528fdd94 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2641,282 +2641,6 @@ static int btusb_recv_event_realtek(struct hci_dev *hdev, struct sk_buff *skb)
 	return hci_recv_frame(hdev, skb);
 }
 
-/* UHW CR mapping */
-#define MTK_BT_MISC		0x70002510
-#define MTK_BT_SUBSYS_RST	0x70002610
-#define MTK_UDMA_INT_STA_BT	0x74000024
-#define MTK_UDMA_INT_STA_BT1	0x74000308
-#define MTK_BT_WDT_STATUS	0x740003A0
-#define MTK_EP_RST_OPT		0x74011890
-#define MTK_EP_RST_IN_OUT_OPT	0x00010001
-#define MTK_BT_RST_DONE		0x00000100
-#define MTK_BT_RESET_REG_CONNV3	0x70028610
-#define MTK_BT_READ_DEV_ID	0x70010200
-
-
-static void btusb_mtk_wmt_recv(struct urb *urb)
-{
-	struct hci_dev *hdev = urb->context;
-	struct btusb_data *data = hci_get_drvdata(hdev);
-	struct sk_buff *skb;
-	int err;
-
-	if (urb->status == 0 && urb->actual_length > 0) {
-		hdev->stat.byte_rx += urb->actual_length;
-
-		/* WMT event shouldn't be fragmented and the size should be
-		 * less than HCI_WMT_MAX_EVENT_SIZE.
-		 */
-		skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
-		if (!skb) {
-			hdev->stat.err_rx++;
-			kfree(urb->setup_packet);
-			return;
-		}
-
-		hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
-		skb_put_data(skb, urb->transfer_buffer, urb->actual_length);
-
-		/* When someone waits for the WMT event, the skb is being cloned
-		 * and being processed the events from there then.
-		 */
-		if (test_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) {
-			data->evt_skb = skb_clone(skb, GFP_ATOMIC);
-			if (!data->evt_skb) {
-				kfree_skb(skb);
-				kfree(urb->setup_packet);
-				return;
-			}
-		}
-
-		err = hci_recv_frame(hdev, skb);
-		if (err < 0) {
-			kfree_skb(data->evt_skb);
-			data->evt_skb = NULL;
-			kfree(urb->setup_packet);
-			return;
-		}
-
-		if (test_and_clear_bit(BTUSB_TX_WAIT_VND_EVT,
-				       &data->flags)) {
-			/* Barrier to sync with other CPUs */
-			smp_mb__after_atomic();
-			wake_up_bit(&data->flags,
-				    BTUSB_TX_WAIT_VND_EVT);
-		}
-		kfree(urb->setup_packet);
-		return;
-	} else if (urb->status == -ENOENT) {
-		/* Avoid suspend failed when usb_kill_urb */
-		return;
-	}
-
-	usb_mark_last_busy(data->udev);
-
-	/* The URB complete handler is still called with urb->actual_length = 0
-	 * when the event is not available, so we should keep re-submitting
-	 * URB until WMT event returns, Also, It's necessary to wait some time
-	 * between the two consecutive control URBs to relax the target device
-	 * to generate the event. Otherwise, the WMT event cannot return from
-	 * the device successfully.
-	 */
-	udelay(500);
-
-	usb_anchor_urb(urb, &data->ctrl_anchor);
-	err = usb_submit_urb(urb, GFP_ATOMIC);
-	if (err < 0) {
-		kfree(urb->setup_packet);
-		/* -EPERM: urb is being killed;
-		 * -ENODEV: device got disconnected
-		 */
-		if (err != -EPERM && err != -ENODEV)
-			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
-				   urb, -err);
-		usb_unanchor_urb(urb);
-	}
-}
-
-static int btusb_mtk_submit_wmt_recv_urb(struct hci_dev *hdev)
-{
-	struct btusb_data *data = hci_get_drvdata(hdev);
-	struct usb_ctrlrequest *dr;
-	unsigned char *buf;
-	int err, size = 64;
-	unsigned int pipe;
-	struct urb *urb;
-
-	urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (!urb)
-		return -ENOMEM;
-
-	dr = kmalloc(sizeof(*dr), GFP_KERNEL);
-	if (!dr) {
-		usb_free_urb(urb);
-		return -ENOMEM;
-	}
-
-	dr->bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
-	dr->bRequest     = 1;
-	dr->wIndex       = cpu_to_le16(0);
-	dr->wValue       = cpu_to_le16(48);
-	dr->wLength      = cpu_to_le16(size);
-
-	buf = kmalloc(size, GFP_KERNEL);
-	if (!buf) {
-		kfree(dr);
-		usb_free_urb(urb);
-		return -ENOMEM;
-	}
-
-	pipe = usb_rcvctrlpipe(data->udev, 0);
-
-	usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
-			     buf, size, btusb_mtk_wmt_recv, hdev);
-
-	urb->transfer_flags |= URB_FREE_BUFFER;
-
-	usb_anchor_urb(urb, &data->ctrl_anchor);
-	err = usb_submit_urb(urb, GFP_KERNEL);
-	if (err < 0) {
-		if (err != -EPERM && err != -ENODEV)
-			bt_dev_err(hdev, "urb %p submission failed (%d)",
-				   urb, -err);
-		usb_unanchor_urb(urb);
-	}
-
-	usb_free_urb(urb);
-
-	return err;
-}
-
-static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
-				  struct btmtk_hci_wmt_params *wmt_params)
-{
-	struct btusb_data *data = hci_get_drvdata(hdev);
-	struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
-	u32 hlen, status = BTMTK_WMT_INVALID;
-	struct btmtk_hci_wmt_evt *wmt_evt;
-	struct btmtk_hci_wmt_cmd *wc;
-	struct btmtk_wmt_hdr *hdr;
-	int err;
-
-	/* Send the WMT command and wait until the WMT event returns */
-	hlen = sizeof(*hdr) + wmt_params->dlen;
-	if (hlen > 255)
-		return -EINVAL;
-
-	wc = kzalloc(hlen, GFP_KERNEL);
-	if (!wc)
-		return -ENOMEM;
-
-	hdr = &wc->hdr;
-	hdr->dir = 1;
-	hdr->op = wmt_params->op;
-	hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
-	hdr->flag = wmt_params->flag;
-	memcpy(wc->data, wmt_params->data, wmt_params->dlen);
-
-	set_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
-
-	/* WMT cmd/event doesn't follow up the generic HCI cmd/event handling,
-	 * it needs constantly polling control pipe until the host received the
-	 * WMT event, thus, we should require to specifically acquire PM counter
-	 * on the USB to prevent the interface from entering auto suspended
-	 * while WMT cmd/event in progress.
-	 */
-	err = usb_autopm_get_interface(data->intf);
-	if (err < 0)
-		goto err_free_wc;
-
-	err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
-
-	if (err < 0) {
-		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
-		usb_autopm_put_interface(data->intf);
-		goto err_free_wc;
-	}
-
-	/* Submit control IN URB on demand to process the WMT event */
-	err = btusb_mtk_submit_wmt_recv_urb(hdev);
-
-	usb_autopm_put_interface(data->intf);
-
-	if (err < 0)
-		goto err_free_wc;
-
-	/* The vendor specific WMT commands are all answered by a vendor
-	 * specific event and will have the Command Status or Command
-	 * Complete as with usual HCI command flow control.
-	 *
-	 * After sending the command, wait for BTUSB_TX_WAIT_VND_EVT
-	 * state to be cleared. The driver specific event receive routine
-	 * will clear that state and with that indicate completion of the
-	 * WMT command.
-	 */
-	err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT,
-				  TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
-	if (err == -EINTR) {
-		bt_dev_err(hdev, "Execution of wmt command interrupted");
-		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
-		goto err_free_wc;
-	}
-
-	if (err) {
-		bt_dev_err(hdev, "Execution of wmt command timed out");
-		clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags);
-		err = -ETIMEDOUT;
-		goto err_free_wc;
-	}
-
-	if (data->evt_skb == NULL)
-		goto err_free_wc;
-
-	/* Parse and handle the return WMT event */
-	wmt_evt = (struct btmtk_hci_wmt_evt *)data->evt_skb->data;
-	if (wmt_evt->whdr.op != hdr->op) {
-		bt_dev_err(hdev, "Wrong op received %d expected %d",
-			   wmt_evt->whdr.op, hdr->op);
-		err = -EIO;
-		goto err_free_skb;
-	}
-
-	switch (wmt_evt->whdr.op) {
-	case BTMTK_WMT_SEMAPHORE:
-		if (wmt_evt->whdr.flag == 2)
-			status = BTMTK_WMT_PATCH_UNDONE;
-		else
-			status = BTMTK_WMT_PATCH_DONE;
-		break;
-	case BTMTK_WMT_FUNC_CTRL:
-		wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
-		if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
-			status = BTMTK_WMT_ON_DONE;
-		else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
-			status = BTMTK_WMT_ON_PROGRESS;
-		else
-			status = BTMTK_WMT_ON_UNDONE;
-		break;
-	case BTMTK_WMT_PATCH_DWNLD:
-		if (wmt_evt->whdr.flag == 2)
-			status = BTMTK_WMT_PATCH_DONE;
-		else if (wmt_evt->whdr.flag == 1)
-			status = BTMTK_WMT_PATCH_PROGRESS;
-		else
-			status = BTMTK_WMT_PATCH_UNDONE;
-		break;
-	}
-
-	if (wmt_params->status)
-		*wmt_params->status = status;
-
-err_free_skb:
-	kfree_skb(data->evt_skb);
-	data->evt_skb = NULL;
-err_free_wc:
-	kfree(wc);
-	return err;
-}
-
 static int btusb_mtk_func_query(struct hci_dev *hdev)
 {
 	struct btmtk_hci_wmt_params wmt_params;
@@ -2930,7 +2654,7 @@ static int btusb_mtk_func_query(struct hci_dev *hdev)
 	wmt_params.data = &param;
 	wmt_params.status = &status;
 
-	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
+	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
 	if (err < 0) {
 		bt_dev_err(hdev, "Failed to query function status (%d)", err);
 		return err;
@@ -3251,7 +2975,7 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 				      fw_version, fw_flavor);
 
 		err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
-						btusb_mtk_hci_wmt_sync);
+						btmtk_usb_hci_wmt_sync);
 		if (err < 0) {
 			bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
 			clear_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
@@ -3271,7 +2995,7 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 		wmt_params.data = &param;
 		wmt_params.status = NULL;
 
-		err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
+		err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
 		if (err < 0) {
 			bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
 			return err;
@@ -3293,7 +3017,7 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 	wmt_params.data = NULL;
 	wmt_params.status = &status;
 
-	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
+	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
 	if (err < 0) {
 		bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
 		return err;
@@ -3306,7 +3030,7 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 
 	/* Setup a firmware which the device definitely requires */
 	err = btmtk_setup_firmware(hdev, fwname,
-				   btusb_mtk_hci_wmt_sync);
+				   btmtk_usb_hci_wmt_sync);
 	if (err < 0)
 		return err;
 
@@ -3335,7 +3059,7 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 	wmt_params.data = &param;
 	wmt_params.status = NULL;
 
-	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
+	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
 	if (err < 0) {
 		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
 		return err;
@@ -3381,7 +3105,7 @@ static int btusb_mtk_shutdown(struct hci_dev *hdev)
 	wmt_params.data = &param;
 	wmt_params.status = NULL;
 
-	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);
+	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
 	if (err < 0) {
 		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
 		return err;
-- 
2.18.0

[PATCH v6 6/8] Bluetooth: btmtk: move btusb_mtk_[setup, shutdown] to btmtk.c

[Chris Lu]

Move btusb_mtk_[setup, shutdown] and related function from
btusb.c to btmtk.c which holds vendor specific stuff and
would make btusb.c clean.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
---
 drivers/bluetooth/btmtk.c | 454 +++++++++++++++++++++++++++++++++++++-
 drivers/bluetooth/btmtk.h |  23 +-
 drivers/bluetooth/btusb.c | 452 ++-----------------------------------
 3 files changed, 484 insertions(+), 445 deletions(-)

diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
index 3443a0837a86..f5ecb8227d3b 100644
--- a/drivers/bluetooth/btmtk.c
+++ b/drivers/bluetooth/btmtk.c
@@ -5,6 +5,8 @@
 #include <linux/module.h>
 #include <linux/firmware.h>
 #include <linux/usb.h>
+#include <linux/iopoll.h>
+#include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -567,8 +569,8 @@ static int btmtk_usb_submit_wmt_recv_urb(struct hci_dev *hdev)
 	return err;
 }
 
-int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
-			   struct btmtk_hci_wmt_params *wmt_params)
+static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
+				  struct btmtk_hci_wmt_params *wmt_params)
 {
 	struct btmtk_data *data = hci_get_priv(hdev);
 	struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
@@ -694,7 +696,453 @@ int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
 	kfree(wc);
 	return err;
 }
-EXPORT_SYMBOL_GPL(btmtk_usb_hci_wmt_sync);
+
+static int btmtk_usb_func_query(struct hci_dev *hdev)
+{
+	struct btmtk_hci_wmt_params wmt_params;
+	int status, err;
+	u8 param = 0;
+
+	/* Query whether the function is enabled */
+	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
+	wmt_params.flag = 4;
+	wmt_params.dlen = sizeof(param);
+	wmt_params.data = &param;
+	wmt_params.status = &status;
+
+	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to query function status (%d)", err);
+		return err;
+	}
+
+	return status;
+}
+
+static int btmtk_usb_uhw_reg_write(struct hci_dev *hdev, u32 reg, u32 val)
+{
+	struct btmtk_data *data = hci_get_priv(hdev);
+	int pipe, err;
+	void *buf;
+
+	buf = kzalloc(4, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	put_unaligned_le32(val, buf);
+
+	pipe = usb_sndctrlpipe(data->udev, 0);
+	err = usb_control_msg(data->udev, pipe, 0x02,
+			      0x5E,
+			      reg >> 16, reg & 0xffff,
+			      buf, 4, USB_CTRL_SET_TIMEOUT);
+	if (err < 0)
+		bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
+
+	kfree(buf);
+
+	return err;
+}
+
+static int btmtk_usb_uhw_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
+{
+	struct btmtk_data *data = hci_get_priv(hdev);
+	int pipe, err;
+	void *buf;
+
+	buf = kzalloc(4, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	pipe = usb_rcvctrlpipe(data->udev, 0);
+	err = usb_control_msg(data->udev, pipe, 0x01,
+			      0xDE,
+			      reg >> 16, reg & 0xffff,
+			      buf, 4, USB_CTRL_GET_TIMEOUT);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
+		goto err_free_buf;
+	}
+
+	*val = get_unaligned_le32(buf);
+	bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
+
+err_free_buf:
+	kfree(buf);
+
+	return err;
+}
+
+static int btmtk_usb_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
+{
+	struct btmtk_data *data = hci_get_priv(hdev);
+	int pipe, err, size = sizeof(u32);
+	void *buf;
+
+	buf = kzalloc(size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	pipe = usb_rcvctrlpipe(data->udev, 0);
+	err = usb_control_msg(data->udev, pipe, 0x63,
+			      USB_TYPE_VENDOR | USB_DIR_IN,
+			      reg >> 16, reg & 0xffff,
+			      buf, size, USB_CTRL_GET_TIMEOUT);
+	if (err < 0)
+		goto err_free_buf;
+
+	*val = get_unaligned_le32(buf);
+
+err_free_buf:
+	kfree(buf);
+
+	return err;
+}
+
+static int btmtk_usb_id_get(struct hci_dev *hdev, u32 reg, u32 *id)
+{
+	return btmtk_usb_reg_read(hdev, reg, id);
+}
+
+static u32 btmtk_usb_reset_done(struct hci_dev *hdev)
+{
+	u32 val = 0;
+
+	btmtk_usb_uhw_reg_read(hdev, MTK_BT_MISC, &val);
+
+	return val & MTK_BT_RST_DONE;
+}
+
+int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
+{
+	u32 val;
+	int err;
+
+	if (dev_id == 0x7922) {
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
+		if (err < 0)
+			return err;
+		val |= 0x00002020;
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
+		if (err < 0)
+			return err;
+		val |= BIT(0);
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, val);
+		if (err < 0)
+			return err;
+		msleep(100);
+	} else if (dev_id == 0x7925) {
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
+		if (err < 0)
+			return err;
+		val |= (1 << 5);
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
+		if (err < 0)
+			return err;
+		val &= 0xFFFF00FF;
+		val |= (1 << 13);
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, 0x00010001);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_RESET_REG_CONNV3, &val);
+		if (err < 0)
+			return err;
+		val |= (1 << 0);
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_RESET_REG_CONNV3, val);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
+		if (err < 0)
+			return err;
+		msleep(100);
+	} else {
+		/* It's Device EndPoint Reset Option Register */
+		bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_WDT_STATUS, &val);
+		if (err < 0)
+			return err;
+		/* Reset the bluetooth chip via USB interface. */
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 1);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT, &val);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT1, 0x000000FF);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_UDMA_INT_STA_BT1, &val);
+		if (err < 0)
+			return err;
+		/* MT7921 need to delay 20ms between toggle reset bit */
+		msleep(20);
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_BT_SUBSYS_RST, 0);
+		if (err < 0)
+			return err;
+		err = btmtk_usb_uhw_reg_read(hdev, MTK_BT_SUBSYS_RST, &val);
+		if (err < 0)
+			return err;
+	}
+
+	err = readx_poll_timeout(btmtk_usb_reset_done, hdev, val,
+				 val & MTK_BT_RST_DONE, 20000, 1000000);
+	if (err < 0)
+		bt_dev_err(hdev, "Reset timeout");
+
+	if (dev_id == 0x7922) {
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_UDMA_INT_STA_BT, 0x000000FF);
+		if (err < 0)
+			return err;
+	}
+
+	err = btmtk_usb_id_get(hdev, 0x70010200, &val);
+	if (err < 0 || !val)
+		bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_subsys_reset);
+
+int btmtk_usb_setup(struct hci_dev *hdev)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+	struct btmtk_hci_wmt_params wmt_params;
+	ktime_t calltime, delta, rettime;
+	struct btmtk_tci_sleep tci_sleep;
+	unsigned long long duration;
+	struct sk_buff *skb;
+	const char *fwname;
+	int err, status;
+	u32 dev_id = 0;
+	char fw_bin_name[64];
+	u32 fw_version = 0, fw_flavor = 0;
+	u8 param;
+
+	calltime = ktime_get();
+
+	err = btmtk_usb_id_get(hdev, 0x80000008, &dev_id);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to get device id (%d)", err);
+		return err;
+	}
+
+	if (!dev_id || dev_id != 0x7663) {
+		err = btmtk_usb_id_get(hdev, 0x70010200, &dev_id);
+		if (err < 0) {
+			bt_dev_err(hdev, "Failed to get device id (%d)", err);
+			return err;
+		}
+		err = btmtk_usb_id_get(hdev, 0x80021004, &fw_version);
+		if (err < 0) {
+			bt_dev_err(hdev, "Failed to get fw version (%d)", err);
+			return err;
+		}
+		err = btmtk_usb_id_get(hdev, 0x70010020, &fw_flavor);
+		if (err < 0) {
+			bt_dev_err(hdev, "Failed to get fw flavor (%d)", err);
+			return err;
+		}
+		fw_flavor = (fw_flavor & 0x00000080) >> 7;
+	}
+
+	btmtk_data->dev_id = dev_id;
+
+	err = btmtk_register_coredump(hdev, btmtk_data->drv_name, fw_version);
+	if (err < 0)
+		bt_dev_err(hdev, "Failed to register coredump (%d)", err);
+
+	switch (dev_id) {
+	case 0x7663:
+		fwname = FIRMWARE_MT7663;
+		break;
+	case 0x7668:
+		fwname = FIRMWARE_MT7668;
+		break;
+	case 0x7922:
+	case 0x7961:
+	case 0x7925:
+		/* Reset the device to ensure it's in the initial state before
+		 * downloading the firmware to ensure.
+		 */
+
+		if (!test_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags))
+			btmtk_usb_subsys_reset(hdev, dev_id);
+
+		btmtk_fw_get_filename(fw_bin_name, sizeof(fw_bin_name), dev_id,
+				      fw_version, fw_flavor);
+
+		err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
+						btmtk_usb_hci_wmt_sync);
+		if (err < 0) {
+			bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
+			clear_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags);
+			return err;
+		}
+
+		set_bit(BTMTK_FIRMWARE_LOADED, &btmtk_data->flags);
+
+		/* It's Device EndPoint Reset Option Register */
+		err = btmtk_usb_uhw_reg_write(hdev, MTK_EP_RST_OPT,
+					      MTK_EP_RST_IN_OUT_OPT);
+		if (err < 0)
+			return err;
+
+		/* Enable Bluetooth protocol */
+		param = 1;
+		wmt_params.op = BTMTK_WMT_FUNC_CTRL;
+		wmt_params.flag = 0;
+		wmt_params.dlen = sizeof(param);
+		wmt_params.data = &param;
+		wmt_params.status = NULL;
+
+		err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+		if (err < 0) {
+			bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
+			return err;
+		}
+
+		hci_set_msft_opcode(hdev, 0xFD30);
+		hci_set_aosp_capable(hdev);
+
+		goto done;
+	default:
+		bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
+			   dev_id);
+		return -ENODEV;
+	}
+
+	/* Query whether the firmware is already download */
+	wmt_params.op = BTMTK_WMT_SEMAPHORE;
+	wmt_params.flag = 1;
+	wmt_params.dlen = 0;
+	wmt_params.data = NULL;
+	wmt_params.status = &status;
+
+	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
+		return err;
+	}
+
+	if (status == BTMTK_WMT_PATCH_DONE) {
+		bt_dev_info(hdev, "firmware already downloaded");
+		goto ignore_setup_fw;
+	}
+
+	/* Setup a firmware which the device definitely requires */
+	err = btmtk_setup_firmware(hdev, fwname,
+				   btmtk_usb_hci_wmt_sync);
+	if (err < 0)
+		return err;
+
+ignore_setup_fw:
+	err = readx_poll_timeout(btmtk_usb_func_query, hdev, status,
+				 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
+				 2000, 5000000);
+	/* -ETIMEDOUT happens */
+	if (err < 0)
+		return err;
+
+	/* The other errors happen in btmtk_usb_func_query */
+	if (status < 0)
+		return status;
+
+	if (status == BTMTK_WMT_ON_DONE) {
+		bt_dev_info(hdev, "function already on");
+		goto ignore_func_on;
+	}
+
+	/* Enable Bluetooth protocol */
+	param = 1;
+	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
+	wmt_params.flag = 0;
+	wmt_params.dlen = sizeof(param);
+	wmt_params.data = &param;
+	wmt_params.status = NULL;
+
+	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
+		return err;
+	}
+
+ignore_func_on:
+	/* Apply the low power environment setup */
+	tci_sleep.mode = 0x5;
+	tci_sleep.duration = cpu_to_le16(0x640);
+	tci_sleep.host_duration = cpu_to_le16(0x640);
+	tci_sleep.host_wakeup_pin = 0;
+	tci_sleep.time_compensation = 0;
+
+	skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
+			     HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
+		return err;
+	}
+	kfree_skb(skb);
+
+done:
+	rettime = ktime_get();
+	delta = ktime_sub(rettime, calltime);
+	duration = (unsigned long long)ktime_to_ns(delta) >> 10;
+
+	bt_dev_info(hdev, "Device setup in %llu usecs", duration);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_setup);
+
+int btmtk_usb_shutdown(struct hci_dev *hdev)
+{
+	struct btmtk_hci_wmt_params wmt_params;
+	u8 param = 0;
+	int err;
+
+	/* Disable the device */
+	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
+	wmt_params.flag = 0;
+	wmt_params.dlen = sizeof(param);
+	wmt_params.data = &param;
+	wmt_params.status = NULL;
+
+	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
+		return err;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_shutdown);
 
 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
 MODULE_AUTHOR("Mark Chen <mark-yw.chen@mediatek.com>");
diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
index 3055b9728ae2..fe41528ae509 100644
--- a/drivers/bluetooth/btmtk.h
+++ b/drivers/bluetooth/btmtk.h
@@ -140,6 +140,8 @@ struct btmtk_hci_wmt_params {
 
 enum {
 	BTMTK_TX_WAIT_VND_EVT,
+	BTMTK_FIRMWARE_LOADED,
+	BTMTK_HW_RESET_ACTIVE,
 };
 
 typedef int (*btmtk_reset_sync_func_t)(struct hci_dev *, void *);
@@ -152,6 +154,7 @@ struct btmtk_coredump_info {
 };
 
 struct btmtk_data {
+	const char *drv_name;
 	unsigned long flags;
 	u32 dev_id;
 	btmtk_reset_sync_func_t reset_sync;
@@ -186,8 +189,11 @@ int btmtk_process_coredump(struct hci_dev *hdev, struct sk_buff *skb);
 void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id, u32 fw_ver,
 			   u32 fw_flavor);
 
-int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
-			   struct btmtk_hci_wmt_params *wmt_params);
+int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id);
+
+int btmtk_usb_setup(struct hci_dev *hdev);
+
+int btmtk_usb_shutdown(struct hci_dev *hdev);
 #else
 
 static inline int btmtk_set_bdaddr(struct hci_dev *hdev,
@@ -228,8 +234,17 @@ static void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id,
 {
 }
 
-static int btmtk_usb_hci_wmt_sync(struct hci_dev *hdev,
-				  struct btmtk_hci_wmt_params *wmt_params)
+static int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
+{
+	return -EOPNOTSUPP;
+}
+
+static int btmtk_usb_setup(struct hci_dev *hdev)
+{
+	return -EOPNOTSUPP;
+}
+
+static int btmtk_usb_shutdown(struct hci_dev *hdev)
 {
 	return -EOPNOTSUPP;
 }
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 660e528fdd94..d61a1d02e3e3 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2641,241 +2641,6 @@ static int btusb_recv_event_realtek(struct hci_dev *hdev, struct sk_buff *skb)
 	return hci_recv_frame(hdev, skb);
 }
 
-static int btusb_mtk_func_query(struct hci_dev *hdev)
-{
-	struct btmtk_hci_wmt_params wmt_params;
-	int status, err;
-	u8 param = 0;
-
-	/* Query whether the function is enabled */
-	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
-	wmt_params.flag = 4;
-	wmt_params.dlen = sizeof(param);
-	wmt_params.data = &param;
-	wmt_params.status = &status;
-
-	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to query function status (%d)", err);
-		return err;
-	}
-
-	return status;
-}
-
-static int btusb_mtk_uhw_reg_write(struct btusb_data *data, u32 reg, u32 val)
-{
-	struct hci_dev *hdev = data->hdev;
-	int pipe, err;
-	void *buf;
-
-	buf = kzalloc(4, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	put_unaligned_le32(val, buf);
-
-	pipe = usb_sndctrlpipe(data->udev, 0);
-	err = usb_control_msg(data->udev, pipe, 0x02,
-			      0x5E,
-			      reg >> 16, reg & 0xffff,
-			      buf, 4, USB_CTRL_SET_TIMEOUT);
-	if (err < 0)
-		bt_dev_err(hdev, "Failed to write uhw reg(%d)", err);
-
-	kfree(buf);
-
-	return err;
-}
-
-static int btusb_mtk_uhw_reg_read(struct btusb_data *data, u32 reg, u32 *val)
-{
-	struct hci_dev *hdev = data->hdev;
-	int pipe, err;
-	void *buf;
-
-	buf = kzalloc(4, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	pipe = usb_rcvctrlpipe(data->udev, 0);
-	err = usb_control_msg(data->udev, pipe, 0x01,
-			      0xDE,
-			      reg >> 16, reg & 0xffff,
-			      buf, 4, USB_CTRL_GET_TIMEOUT);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to read uhw reg(%d)", err);
-		goto err_free_buf;
-	}
-
-	*val = get_unaligned_le32(buf);
-	bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val);
-
-err_free_buf:
-	kfree(buf);
-
-	return err;
-}
-
-static int btusb_mtk_reg_read(struct btusb_data *data, u32 reg, u32 *val)
-{
-	int pipe, err, size = sizeof(u32);
-	void *buf;
-
-	buf = kzalloc(size, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	pipe = usb_rcvctrlpipe(data->udev, 0);
-	err = usb_control_msg(data->udev, pipe, 0x63,
-			      USB_TYPE_VENDOR | USB_DIR_IN,
-			      reg >> 16, reg & 0xffff,
-			      buf, size, USB_CTRL_GET_TIMEOUT);
-	if (err < 0)
-		goto err_free_buf;
-
-	*val = get_unaligned_le32(buf);
-
-err_free_buf:
-	kfree(buf);
-
-	return err;
-}
-
-static int btusb_mtk_id_get(struct btusb_data *data, u32 reg, u32 *id)
-{
-	return btusb_mtk_reg_read(data, reg, id);
-}
-
-static u32 btusb_mtk_reset_done(struct hci_dev *hdev)
-{
-	struct btusb_data *data = hci_get_drvdata(hdev);
-	u32 val = 0;
-
-	btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val);
-
-	return val & MTK_BT_RST_DONE;
-}
-
-static int btusb_mtk_subsys_reset(struct hci_dev *hdev, u32 dev_id)
-{
-	struct btusb_data *data = hci_get_drvdata(hdev);
-	u32 val;
-	int err;
-
-	if (dev_id == 0x7922) {
-		err = btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
-		if (err < 0)
-			return err;
-		val |= 0x00002020;
-		err = btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
-		if (err < 0)
-			return err;
-		val |= BIT(0);
-		err = btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
-		if (err < 0)
-			return err;
-		msleep(100);
-	} else if (dev_id == 0x7925) {
-		err = btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
-		if (err < 0)
-			return err;
-		val |= (1 << 5);
-		err = btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
-		if (err < 0)
-			return err;
-		val &= 0xFFFF00FF;
-		if (err < 0)
-			return err;
-		val |= (1 << 13);
-		err = btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
-		if (err < 0)
-			return err;
-		val |= (1 << 0);
-		err = btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
-		if (err < 0)
-			return err;
-		msleep(100);
-	} else {
-		/* It's Device EndPoint Reset Option Register */
-		bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
-		err = btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);
-		if (err < 0)
-			return err;
-		/* Reset the bluetooth chip via USB interface. */
-		err = btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
-		if (err < 0)
-			return err;
-		/* MT7921 need to delay 20ms between toggle reset bit */
-		msleep(20);
-		err = btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
-		if (err < 0)
-			return err;
-		err = btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
-		if (err < 0)
-			return err;
-	}
-
-	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");
-
-	if (dev_id == 0x7922) {
-		err = btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
-		if (err < 0)
-			return err;
-	}
-
-	err = btusb_mtk_id_get(data, 0x70010200, &val);
-	if (err < 0 || !val)
-		bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
-
-	return err;
-}
-
 static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
@@ -2883,7 +2648,7 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
 	int err;
 
 	/* It's MediaTek specific bluetooth reset mechanism via USB */
-	if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
+	if (test_and_set_bit(BTMTK_HW_RESET_ACTIVE, &btmtk_data->flags)) {
 		bt_dev_err(hdev, "last reset failed? Not resetting again");
 		return -EBUSY;
 	}
@@ -2895,10 +2660,10 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
 	btusb_stop_traffic(data);
 	usb_kill_anchored_urbs(&data->tx_anchor);
 
-	err = btusb_mtk_subsys_reset(hdev, btmtk_data->dev_id);
+	err = btmtk_usb_subsys_reset(hdev, btmtk_data->dev_id);
 
 	usb_queue_reset_device(data->intf);
-	clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags);
+	clear_bit(BTMTK_HW_RESET_ACTIVE, &btmtk_data->flags);
 
 	return err;
 }
@@ -2906,212 +2671,23 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
 static int btusb_mtk_setup(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
-	struct btmtk_hci_wmt_params wmt_params;
-	ktime_t calltime, delta, rettime;
-	struct btmtk_tci_sleep tci_sleep;
-	unsigned long long duration;
-	struct sk_buff *skb;
-	const char *fwname;
-	int err, status;
-	u32 dev_id = 0;
-	char fw_bin_name[64];
-	u32 fw_version = 0, fw_flavor = 0;
-	u8 param;
-	struct btmtk_data *mediatek;
-
-	calltime = ktime_get();
-
-	err = btusb_mtk_id_get(data, 0x80000008, &dev_id);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to get device id (%d)", err);
-		return err;
-	}
-
-	if (!dev_id || dev_id != 0x7663) {
-		err = btusb_mtk_id_get(data, 0x70010200, &dev_id);
-		if (err < 0) {
-			bt_dev_err(hdev, "Failed to get device id (%d)", err);
-			return err;
-		}
-		err = btusb_mtk_id_get(data, 0x80021004, &fw_version);
-		if (err < 0) {
-			bt_dev_err(hdev, "Failed to get fw version (%d)", err);
-			return err;
-		}
-		err = btusb_mtk_id_get(data, 0x70010020, &fw_flavor);
-		if (err < 0) {
-			bt_dev_err(hdev, "Failed to get fw flavor (%d)", err);
-			return err;
-		}
-		fw_flavor = (fw_flavor & 0x00000080) >> 7;
-	}
-
-	mediatek = hci_get_priv(hdev);
-	mediatek->dev_id = dev_id;
-	mediatek->reset_sync = btusb_mtk_reset;
-
-	err = btmtk_register_coredump(hdev, btusb_driver.name, fw_version);
-	if (err < 0)
-		bt_dev_err(hdev, "Failed to register coredump (%d)", err);
-
-	switch (dev_id) {
-	case 0x7663:
-		fwname = FIRMWARE_MT7663;
-		break;
-	case 0x7668:
-		fwname = FIRMWARE_MT7668;
-		break;
-	case 0x7922:
-	case 0x7961:
-	case 0x7925:
-		/* Reset the device to ensure it's in the initial state before
-		 * downloading the firmware to ensure.
-		 */
-
-		if (!test_bit(BTUSB_FIRMWARE_LOADED, &data->flags))
-			btusb_mtk_subsys_reset(hdev, dev_id);
-
-		btmtk_fw_get_filename(fw_bin_name, sizeof(fw_bin_name), dev_id,
-				      fw_version, fw_flavor);
-
-		err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
-						btmtk_usb_hci_wmt_sync);
-		if (err < 0) {
-			bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
-			clear_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
-			return err;
-		}
-
-		set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
-
-		/* It's Device EndPoint Reset Option Register */
-		btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
-
-		/* Enable Bluetooth protocol */
-		param = 1;
-		wmt_params.op = BTMTK_WMT_FUNC_CTRL;
-		wmt_params.flag = 0;
-		wmt_params.dlen = sizeof(param);
-		wmt_params.data = &param;
-		wmt_params.status = NULL;
-
-		err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
-		if (err < 0) {
-			bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
-			return err;
-		}
-
-		hci_set_msft_opcode(hdev, 0xFD30);
-		hci_set_aosp_capable(hdev);
-		goto done;
-	default:
-		bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
-			   dev_id);
-		return -ENODEV;
-	}
-
-	/* Query whether the firmware is already download */
-	wmt_params.op = BTMTK_WMT_SEMAPHORE;
-	wmt_params.flag = 1;
-	wmt_params.dlen = 0;
-	wmt_params.data = NULL;
-	wmt_params.status = &status;
-
-	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
-		return err;
-	}
-
-	if (status == BTMTK_WMT_PATCH_DONE) {
-		bt_dev_info(hdev, "firmware already downloaded");
-		goto ignore_setup_fw;
-	}
-
-	/* Setup a firmware which the device definitely requires */
-	err = btmtk_setup_firmware(hdev, fwname,
-				   btmtk_usb_hci_wmt_sync);
-	if (err < 0)
-		return err;
-
-ignore_setup_fw:
-	err = readx_poll_timeout(btusb_mtk_func_query, hdev, status,
-				 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
-				 2000, 5000000);
-	/* -ETIMEDOUT happens */
-	if (err < 0)
-		return err;
-
-	/* The other errors happen in btusb_mtk_func_query */
-	if (status < 0)
-		return status;
-
-	if (status == BTMTK_WMT_ON_DONE) {
-		bt_dev_info(hdev, "function already on");
-		goto ignore_func_on;
-	}
-
-	/* Enable Bluetooth protocol */
-	param = 1;
-	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
-	wmt_params.flag = 0;
-	wmt_params.dlen = sizeof(param);
-	wmt_params.data = &param;
-	wmt_params.status = NULL;
-
-	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
-		return err;
-	}
-
-ignore_func_on:
-	/* Apply the low power environment setup */
-	tci_sleep.mode = 0x5;
-	tci_sleep.duration = cpu_to_le16(0x640);
-	tci_sleep.host_duration = cpu_to_le16(0x640);
-	tci_sleep.host_wakeup_pin = 0;
-	tci_sleep.time_compensation = 0;
-
-	skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
-			     HCI_INIT_TIMEOUT);
-	if (IS_ERR(skb)) {
-		err = PTR_ERR(skb);
-		bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
-		return err;
-	}
-	kfree_skb(skb);
-
-done:
-	rettime = ktime_get();
-	delta = ktime_sub(rettime, calltime);
-	duration = (unsigned long long)ktime_to_ns(delta) >> 10;
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
 
-	bt_dev_info(hdev, "Device setup in %llu usecs", duration);
+	/* MediaTek WMT vendor cmd requiring below USB resources to
+	 * complete the handshake.
+	 */
+	btmtk_data->drv_name = btusb_driver.name;
+	btmtk_data->intf = data->intf;
+	btmtk_data->udev = data->udev;
+	btmtk_data->ctrl_anchor = &data->ctrl_anchor;
+	btmtk_data->reset_sync = btusb_mtk_reset;
 
-	return 0;
+	return btmtk_usb_setup(hdev);
 }
 
 static int btusb_mtk_shutdown(struct hci_dev *hdev)
 {
-	struct btmtk_hci_wmt_params wmt_params;
-	u8 param = 0;
-	int err;
-
-	/* Disable the device */
-	wmt_params.op = BTMTK_WMT_FUNC_CTRL;
-	wmt_params.flag = 0;
-	wmt_params.dlen = sizeof(param);
-	wmt_params.data = &param;
-	wmt_params.status = NULL;
-
-	err = btmtk_usb_hci_wmt_sync(hdev, &wmt_params);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
-		return err;
-	}
-
-	return 0;
+	return btmtk_usb_shutdown(hdev);
 }
 
 static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb)
-- 
2.18.0

[PATCH v6 7/8] Bluetooth: btmtk: move btusb_recv_acl_mtk to btmtk.c

[Chris Lu]

Move btusb_recv_acl_mtk from btusb.c to btmtk.c which holds
vendor specific stuff and would make btusb.c clean.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
---
 drivers/bluetooth/btmtk.c | 33 +++++++++++++++++++++++++++++++++
 drivers/bluetooth/btmtk.h |  7 +++++++
 drivers/bluetooth/btusb.c | 34 +---------------------------------
 3 files changed, 41 insertions(+), 33 deletions(-)

diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
index f5ecb8227d3b..fe3b892f6c6e 100644
--- a/drivers/bluetooth/btmtk.c
+++ b/drivers/bluetooth/btmtk.c
@@ -930,6 +930,39 @@ int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
 }
 EXPORT_SYMBOL_GPL(btmtk_usb_subsys_reset);
 
+int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct btmtk_data *data = hci_get_priv(hdev);
+	u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
+
+	switch (handle) {
+	case 0xfc6f:		/* Firmware dump from device */
+		/* When the firmware hangs, the device can no longer
+		 * suspend and thus disable auto-suspend.
+		 */
+		usb_disable_autosuspend(data->udev);
+
+		/* We need to forward the diagnostic packet to userspace daemon
+		 * for backward compatibility, so we have to clone the packet
+		 * extraly for the in-kernel coredump support.
+		 */
+		if (IS_ENABLED(CONFIG_DEV_COREDUMP)) {
+			struct sk_buff *skb_cd = skb_clone(skb, GFP_ATOMIC);
+
+			if (skb_cd)
+				btmtk_process_coredump(hdev, skb_cd);
+		}
+
+		fallthrough;
+	case 0x05ff:		/* Firmware debug logging 1 */
+	case 0x05fe:		/* Firmware debug logging 2 */
+		return hci_recv_diag(hdev, skb);
+	}
+
+	return hci_recv_frame(hdev, skb);
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl);
+
 int btmtk_usb_setup(struct hci_dev *hdev)
 {
 	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
index fe41528ae509..47193b867b9f 100644
--- a/drivers/bluetooth/btmtk.h
+++ b/drivers/bluetooth/btmtk.h
@@ -191,6 +191,8 @@ void btmtk_fw_get_filename(char *buf, size_t size, u32 dev_id, u32 fw_ver,
 
 int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id);
 
+int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb);
+
 int btmtk_usb_setup(struct hci_dev *hdev);
 
 int btmtk_usb_shutdown(struct hci_dev *hdev);
@@ -239,6 +241,11 @@ static int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id)
 	return -EOPNOTSUPP;
 }
 
+static int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	return -EOPNOTSUPP;
+}
+
 static int btmtk_usb_setup(struct hci_dev *hdev)
 {
 	return -EOPNOTSUPP;
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index d61a1d02e3e3..5de50c835964 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2690,38 +2690,6 @@ static int btusb_mtk_shutdown(struct hci_dev *hdev)
 	return btmtk_usb_shutdown(hdev);
 }
 
-static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb)
-{
-	struct btusb_data *data = hci_get_drvdata(hdev);
-	u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
-
-	switch (handle) {
-	case 0xfc6f:		/* Firmware dump from device */
-		/* When the firmware hangs, the device can no longer
-		 * suspend and thus disable auto-suspend.
-		 */
-		usb_disable_autosuspend(data->udev);
-
-		/* We need to forward the diagnostic packet to userspace daemon
-		 * for backward compatibility, so we have to clone the packet
-		 * extraly for the in-kernel coredump support.
-		 */
-		if (IS_ENABLED(CONFIG_DEV_COREDUMP)) {
-			struct sk_buff *skb_cd = skb_clone(skb, GFP_ATOMIC);
-
-			if (skb_cd)
-				btmtk_process_coredump(hdev, skb_cd);
-		}
-
-		fallthrough;
-	case 0x05ff:		/* Firmware debug logging 1 */
-	case 0x05fe:		/* Firmware debug logging 2 */
-		return hci_recv_diag(hdev, skb);
-	}
-
-	return hci_recv_frame(hdev, skb);
-}
-
 #ifdef CONFIG_PM
 /* Configure an out-of-band gpio as wake-up pin, if specified in device tree */
 static int marvell_config_oob_wake(struct hci_dev *hdev)
@@ -3827,7 +3795,7 @@ static int btusb_probe(struct usb_interface *intf,
 		hdev->set_bdaddr = btmtk_set_bdaddr;
 		set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
 		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
-		data->recv_acl = btusb_recv_acl_mtk;
+		data->recv_acl = btmtk_usb_recv_acl;
 	}
 
 	if (id->driver_info & BTUSB_SWAVE) {
-- 
2.18.0

[PATCH v6 8/8] Bluetooth: btusb: mediatek: add ISO data transmission functions

[Chris Lu]

This patch implements functions for ISO data send and receive in btusb
driver for MediaTek's controller.

MediaTek defines a specific interrupt endpoint for ISO data transmissin
because the characteristics of interrupt endpoint are similar to the
application of ISO data which can support guaranteed transmissin
bandwidth, enough maximum data length and error checking mechanism.

Driver sets up ISO interface and endpoints in btusb_mtk_setup and clears
the setup in btusb_mtk_shutdown. These flow can't move to btmtk.c due to
btusb_driver is only defined in btusb.c when claiming/relaesing interface.
ISO packet anchor stops when driver suspending and resubmit interrupt urb
for ISO data when driver resuming.

Signed-off-by: Chris Lu <chris.lu@mediatek.com>
---
 drivers/bluetooth/btmtk.c | 303 ++++++++++++++++++++++++++++++++++++++
 drivers/bluetooth/btmtk.h |  36 +++++
 drivers/bluetooth/btusb.c |  68 +++++++++
 3 files changed, 407 insertions(+)

diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
index fe3b892f6c6e..dfeae9c283a9 100644
--- a/drivers/bluetooth/btmtk.c
+++ b/drivers/bluetooth/btmtk.c
@@ -22,6 +22,9 @@
 #define MTK_SEC_MAP_COMMON_SIZE	12
 #define MTK_SEC_MAP_NEED_SEND_SIZE	52
 
+/* It is for mt79xx iso data transmission setting */
+#define MTK_ISO_THRESHOLD	264
+
 struct btmtk_patch_header {
 	u8 datetime[16];
 	u8 platform[4];
@@ -963,6 +966,300 @@ int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
 }
 EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl);
 
+static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	if (skb->len > MTK_ISO_THRESHOLD)
+		return -EINVAL;
+
+	if (skb_pad(skb, MTK_ISO_THRESHOLD - skb->len))
+		return -ENOMEM;
+
+	__skb_put(skb, MTK_ISO_THRESHOLD - skb->len);
+
+	return 0;
+}
+
+static int __set_mtk_intr_interface(struct hci_dev *hdev)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+	struct usb_interface *intf = btmtk_data->isopkt_intf;
+	int i, err;
+
+	if (!btmtk_data->isopkt_intf)
+		return -ENODEV;
+
+	err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM, 1);
+	if (err < 0) {
+		bt_dev_err(hdev, "setting interface failed (%d)", -err);
+		return err;
+	}
+
+	btmtk_data->isopkt_tx_ep = NULL;
+	btmtk_data->isopkt_rx_ep = NULL;
+
+	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
+		struct usb_endpoint_descriptor *ep_desc;
+
+		ep_desc = &intf->cur_altsetting->endpoint[i].desc;
+
+		if (!btmtk_data->isopkt_tx_ep &&
+		    usb_endpoint_is_int_out(ep_desc)) {
+			btmtk_data->isopkt_tx_ep = ep_desc;
+			continue;
+		}
+
+		if (!btmtk_data->isopkt_rx_ep &&
+		    usb_endpoint_is_int_in(ep_desc)) {
+			btmtk_data->isopkt_rx_ep = ep_desc;
+			continue;
+		}
+	}
+
+	if (!btmtk_data->isopkt_tx_ep ||
+	    !btmtk_data->isopkt_rx_ep) {
+		bt_dev_err(hdev, "invalid interrupt descriptors");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
+			       usb_complete_t tx_complete)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+	struct urb *urb;
+	unsigned int pipe;
+
+	if (!btmtk_data->isopkt_tx_ep)
+		return ERR_PTR(-ENODEV);
+
+	urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!urb)
+		return ERR_PTR(-ENOMEM);
+
+	if (btmtk_isopkt_pad(hdev, skb))
+		return ERR_PTR(-EINVAL);
+
+	pipe = usb_sndintpipe(btmtk_data->udev,
+			      btmtk_data->isopkt_tx_ep->bEndpointAddress);
+
+	usb_fill_int_urb(urb, btmtk_data->udev, pipe,
+			 skb->data, skb->len, tx_complete,
+			 skb, btmtk_data->isopkt_tx_ep->bInterval);
+
+	skb->dev = (void *)hdev;
+
+	return urb;
+}
+EXPORT_SYMBOL_GPL(alloc_mtk_intr_urb);
+
+static int btmtk_recv_isopkt(struct hci_dev *hdev, void *buffer, int count)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+	struct sk_buff *skb;
+	unsigned long flags;
+	int err = 0;
+
+	spin_lock_irqsave(&btmtk_data->isorxlock, flags);
+	skb = btmtk_data->isopkt_skb;
+
+	while (count) {
+		int len;
+
+		if (!skb) {
+			skb = bt_skb_alloc(HCI_MAX_ISO_SIZE, GFP_ATOMIC);
+			if (!skb) {
+				err = -ENOMEM;
+				break;
+			}
+
+			hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
+			hci_skb_expect(skb) = HCI_ISO_HDR_SIZE;
+		}
+
+		len = min_t(uint, hci_skb_expect(skb), count);
+		skb_put_data(skb, buffer, len);
+
+		count -= len;
+		buffer += len;
+		hci_skb_expect(skb) -= len;
+
+		if (skb->len == HCI_ISO_HDR_SIZE) {
+			__le16 dlen = ((struct hci_iso_hdr *)skb->data)->dlen;
+
+			/* Complete ISO header */
+			hci_skb_expect(skb) = __le16_to_cpu(dlen);
+
+			if (skb_tailroom(skb) < hci_skb_expect(skb)) {
+				kfree_skb(skb);
+				skb = NULL;
+
+				err = -EILSEQ;
+				break;
+			}
+		}
+
+		if (!hci_skb_expect(skb)) {
+			/* Complete frame */
+			hci_recv_frame(hdev, skb);
+			skb = NULL;
+		}
+	}
+
+	btmtk_data->isopkt_skb = skb;
+	spin_unlock_irqrestore(&btmtk_data->isorxlock, flags);
+
+	return err;
+}
+
+static void btmtk_intr_complete(struct urb *urb)
+{
+	struct hci_dev *hdev = urb->context;
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+	int err;
+
+	BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
+	       urb->actual_length);
+
+	if (!test_bit(HCI_RUNNING, &hdev->flags))
+		return;
+
+	if (hdev->suspended)
+		return;
+
+	if (urb->status == 0) {
+		hdev->stat.byte_rx += urb->actual_length;
+
+		if (btmtk_recv_isopkt(hdev, urb->transfer_buffer,
+				      urb->actual_length) < 0) {
+			bt_dev_err(hdev, "corrupted iso packet");
+			hdev->stat.err_rx++;
+		}
+	} else if (urb->status == -ENOENT) {
+		/* Avoid suspend failed when usb_kill_urb */
+		return;
+	}
+
+	usb_mark_last_busy(btmtk_data->udev);
+	usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
+
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (err < 0) {
+		/* -EPERM: urb is being killed;
+		 * -ENODEV: device got disconnected
+		 */
+		if (err != -EPERM && err != -ENODEV)
+			bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
+				   urb, -err);
+		if (err != -EPERM)
+			hci_cmd_sync_cancel(hdev, -err);
+		usb_unanchor_urb(urb);
+	}
+}
+
+static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+	unsigned char *buf;
+	unsigned int pipe;
+	struct urb *urb;
+	int err, size;
+
+	BT_DBG("%s", hdev->name);
+
+	if (!btmtk_data->isopkt_rx_ep)
+		return -ENODEV;
+
+	urb = usb_alloc_urb(0, mem_flags);
+	if (!urb)
+		return -ENOMEM;
+	size = le16_to_cpu(btmtk_data->isopkt_rx_ep->wMaxPacketSize);
+
+	buf = kmalloc(size, mem_flags);
+	if (!buf) {
+		usb_free_urb(urb);
+		return -ENOMEM;
+	}
+
+	pipe = usb_rcvintpipe(btmtk_data->udev,
+			      btmtk_data->isopkt_rx_ep->bEndpointAddress);
+
+	usb_fill_int_urb(urb, btmtk_data->udev, pipe, buf, size,
+			 btmtk_intr_complete, hdev,
+			 btmtk_data->isopkt_rx_ep->bInterval);
+
+	urb->transfer_flags |= URB_FREE_BUFFER;
+
+	usb_mark_last_busy(btmtk_data->udev);
+	usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
+
+	err = usb_submit_urb(urb, mem_flags);
+	if (err < 0) {
+		if (err != -EPERM && err != -ENODEV)
+			bt_dev_err(hdev, "urb %p submission failed (%d)",
+				   urb, -err);
+		usb_unanchor_urb(urb);
+	}
+
+	usb_free_urb(urb);
+
+	return err;
+}
+
+static int btmtk_usb_isointf_init(struct hci_dev *hdev)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+	u8 iso_param[2] = { 0x08, 0x01 };
+	struct sk_buff *skb;
+	int err;
+
+	init_usb_anchor(&btmtk_data->isopkt_anchor);
+	spin_lock_init(&btmtk_data->isorxlock);
+
+	__set_mtk_intr_interface(hdev);
+
+	err = btmtk_submit_intr_urb(hdev, GFP_KERNEL);
+	if (err < 0) {
+		btmtk_usb_isopkt_stop(hdev);
+		bt_dev_err(hdev, "ISO intf not support (%d)", err);
+		return err;
+	}
+
+	skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), iso_param,
+			     HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		bt_dev_err(hdev, "Failed to apply iso setting (%ld)", PTR_ERR(skb));
+		return PTR_ERR(skb);
+	}
+	kfree_skb(skb);
+
+	return 0;
+}
+
+int btmtk_usb_isopkt_start(struct hci_dev *hdev)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+
+	if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) {
+		if (btmtk_submit_intr_urb(hdev, GFP_NOIO) < 0)
+			clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_isopkt_start);
+
+int btmtk_usb_isopkt_stop(struct hci_dev *hdev)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+
+	usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btmtk_usb_isopkt_stop);
+
 int btmtk_usb_setup(struct hci_dev *hdev)
 {
 	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
@@ -1064,6 +1361,12 @@ int btmtk_usb_setup(struct hci_dev *hdev)
 		hci_set_msft_opcode(hdev, 0xFD30);
 		hci_set_aosp_capable(hdev);
 
+		/* Set up ISO interface after protocol enabled */
+		if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) {
+			if (!btmtk_usb_isointf_init(hdev))
+				set_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
+		}
+
 		goto done;
 	default:
 		bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
index 47193b867b9f..b88b599018fa 100644
--- a/drivers/bluetooth/btmtk.h
+++ b/drivers/bluetooth/btmtk.h
@@ -40,6 +40,9 @@
 #define MTK_BT_RESET_REG_CONNV3	0x70028610
 #define MTK_BT_READ_DEV_ID	0x70010200
 
+/* MediaTek ISO Interface */
+#define MTK_ISO_IFNUM		2
+
 enum {
 	BTMTK_WMT_PATCH_DWNLD = 0x1,
 	BTMTK_WMT_TEST = 0x2,
@@ -142,6 +145,8 @@ enum {
 	BTMTK_TX_WAIT_VND_EVT,
 	BTMTK_FIRMWARE_LOADED,
 	BTMTK_HW_RESET_ACTIVE,
+	BTMTK_ISOPKT_OVER_INTR,
+	BTMTK_ISOPKT_RUNNING,
 };
 
 typedef int (*btmtk_reset_sync_func_t)(struct hci_dev *, void *);
@@ -164,6 +169,14 @@ struct btmtk_data {
 	struct usb_interface *intf;
 	struct usb_anchor *ctrl_anchor;
 	struct sk_buff *evt_skb;
+	struct usb_endpoint_descriptor *isopkt_tx_ep;
+	struct usb_endpoint_descriptor *isopkt_rx_ep;
+	struct usb_interface *isopkt_intf;
+	struct usb_anchor isopkt_anchor;
+	struct sk_buff *isopkt_skb;
+
+	/* spinlock for ISO data transmission */
+	spinlock_t isorxlock;
 };
 
 typedef int (*wmt_cmd_sync_func_t)(struct hci_dev *,
@@ -193,6 +206,13 @@ int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id);
 
 int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb);
 
+struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
+			       usb_complete_t tx_complete);
+
+int btmtk_usb_isopkt_start(struct hci_dev *hdev);
+
+int btmtk_usb_isopkt_stop(struct hci_dev *hdev);
+
 int btmtk_usb_setup(struct hci_dev *hdev);
 
 int btmtk_usb_shutdown(struct hci_dev *hdev);
@@ -246,6 +266,22 @@ static int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
 	return -EOPNOTSUPP;
 }
 
+static struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
+				      usb_complete_t tx_complete)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static int btmtk_usb_isopkt_start(struct hci_dev *hdev)
+{
+	return -EOPNOTSUPP;
+}
+
+static int btmtk_usb_isopkt_stop(struct hci_dev *hdev)
+{
+	return -EOPNOTSUPP;
+}
+
 static int btmtk_usb_setup(struct hci_dev *hdev)
 {
 	return -EOPNOTSUPP;
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 5de50c835964..590602dce3f8 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2641,6 +2641,40 @@ static int btusb_recv_event_realtek(struct hci_dev *hdev, struct sk_buff *skb)
 	return hci_recv_frame(hdev, skb);
 }
 
+static void btusb_mtk_claim_iso_intf(struct btusb_data *data)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(data->hdev);
+	int err;
+
+	err = usb_driver_claim_interface(&btusb_driver,
+					 btmtk_data->isopkt_intf, data);
+	if (err < 0) {
+		btmtk_data->isopkt_intf = NULL;
+		bt_dev_err(data->hdev, "Failed to claim iso interface");
+		return;
+	}
+
+	set_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags);
+}
+
+static void btusb_mtk_release_iso_intf(struct btusb_data *data)
+{
+	struct btmtk_data *btmtk_data = hci_get_priv(data->hdev);
+
+	if (btmtk_data->isopkt_intf) {
+		btmtk_usb_isopkt_stop(data->hdev);
+		clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
+
+		dev_kfree_skb_irq(btmtk_data->isopkt_skb);
+		btmtk_data->isopkt_skb = NULL;
+		usb_set_intfdata(btmtk_data->isopkt_intf, NULL);
+		usb_driver_release_interface(&btusb_driver,
+					     btmtk_data->isopkt_intf);
+	}
+
+	clear_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags);
+}
+
 static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
@@ -2657,6 +2691,9 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
 	if (err < 0)
 		return err;
 
+	if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags))
+		btusb_mtk_release_iso_intf(data);
+
 	btusb_stop_traffic(data);
 	usb_kill_anchored_urbs(&data->tx_anchor);
 
@@ -2668,6 +2705,23 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
 	return err;
 }
 
+static int btusb_send_frame_mtk(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct urb *urb;
+
+	BT_DBG("%s", hdev->name);
+
+	if (hci_skb_pkt_type(skb) == HCI_ISODATA_PKT) {
+		urb = alloc_mtk_intr_urb(hdev, skb, btusb_tx_complete);
+		if (IS_ERR(urb))
+			return PTR_ERR(urb);
+
+		return submit_or_queue_tx_urb(hdev, urb);
+	} else {
+		return btusb_send_frame(hdev, skb);
+	}
+}
+
 static int btusb_mtk_setup(struct hci_dev *hdev)
 {
 	struct btusb_data *data = hci_get_drvdata(hdev);
@@ -2682,11 +2736,22 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 	btmtk_data->ctrl_anchor = &data->ctrl_anchor;
 	btmtk_data->reset_sync = btusb_mtk_reset;
 
+	/* Claim ISO data interface and endpoint */
+	btmtk_data->isopkt_intf = usb_ifnum_to_if(data->udev, MTK_ISO_IFNUM);
+	if (btmtk_data->isopkt_intf)
+		btusb_mtk_claim_iso_intf(data);
+
 	return btmtk_usb_setup(hdev);
 }
 
 static int btusb_mtk_shutdown(struct hci_dev *hdev)
 {
+	struct btusb_data *data = hci_get_drvdata(hdev);
+	struct btmtk_data *btmtk_data = hci_get_priv(hdev);
+
+	if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags))
+		btusb_mtk_release_iso_intf(data);
+
 	return btmtk_usb_shutdown(hdev);
 }
 
@@ -3793,9 +3858,12 @@ static int btusb_probe(struct usb_interface *intf,
 		hdev->manufacturer = 70;
 		hdev->cmd_timeout = btmtk_reset_sync;
 		hdev->set_bdaddr = btmtk_set_bdaddr;
+		hdev->send = btusb_send_frame_mtk;
 		set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
 		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
 		data->recv_acl = btmtk_usb_recv_acl;
+		data->suspend = btmtk_usb_isopkt_stop;
+		data->resume = btmtk_usb_isopkt_start;
 	}
 
 	if (id->driver_info & BTUSB_SWAVE) {
-- 
2.18.0

RE: Bluetooth: btmtk: MediaTek ISO data transmission support

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 1422 bytes --]

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=867501

---Test result---

Test Summary:
CheckPatch                    PASS      7.13 seconds
GitLint                       PASS      1.75 seconds
SubjectPrefix                 PASS      0.59 seconds
BuildKernel                   PASS      29.86 seconds
CheckAllWarning               PASS      36.90 seconds
CheckSparse                   PASS      39.34 seconds
CheckSmatch                   PASS      104.09 seconds
BuildKernel32                 PASS      29.02 seconds
TestRunnerSetup               PASS      523.28 seconds
TestRunner_l2cap-tester       PASS      23.94 seconds
TestRunner_iso-tester         PASS      28.98 seconds
TestRunner_bnep-tester        PASS      4.88 seconds
TestRunner_mgmt-tester        PASS      114.42 seconds
TestRunner_rfcomm-tester      PASS      7.37 seconds
TestRunner_sco-tester         PASS      17.15 seconds
TestRunner_ioctl-tester       PASS      21.21 seconds
TestRunner_mesh-tester        PASS      5.97 seconds
TestRunner_smp-tester         PASS      6.95 seconds
TestRunner_userchan-tester    PASS      7.39 seconds
IncrementalBuild              PASS      66.99 seconds



---
Regards,
Linux Bluetooth

Re: [PATCH v6 8/8] Bluetooth: btusb: mediatek: add ISO data transmission functions

[Luiz Augusto von Dentz]

Hi Chris,

On Tue, Jul 2, 2024 at 7:31 AM Chris Lu <chris.lu@mediatek.com> wrote:
>
> This patch implements functions for ISO data send and receive in btusb
> driver for MediaTek's controller.
>
> MediaTek defines a specific interrupt endpoint for ISO data transmissin
> because the characteristics of interrupt endpoint are similar to the
> application of ISO data which can support guaranteed transmissin
> bandwidth, enough maximum data length and error checking mechanism.
>
> Driver sets up ISO interface and endpoints in btusb_mtk_setup and clears
> the setup in btusb_mtk_shutdown. These flow can't move to btmtk.c due to
> btusb_driver is only defined in btusb.c when claiming/relaesing interface.
> ISO packet anchor stops when driver suspending and resubmit interrupt urb
> for ISO data when driver resuming.
>
> Signed-off-by: Chris Lu <chris.lu@mediatek.com>
> ---
>  drivers/bluetooth/btmtk.c | 303 ++++++++++++++++++++++++++++++++++++++
>  drivers/bluetooth/btmtk.h |  36 +++++
>  drivers/bluetooth/btusb.c |  68 +++++++++
>  3 files changed, 407 insertions(+)
>
> diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
> index fe3b892f6c6e..dfeae9c283a9 100644
> --- a/drivers/bluetooth/btmtk.c
> +++ b/drivers/bluetooth/btmtk.c
> @@ -22,6 +22,9 @@
>  #define MTK_SEC_MAP_COMMON_SIZE        12
>  #define MTK_SEC_MAP_NEED_SEND_SIZE     52
>
> +/* It is for mt79xx iso data transmission setting */
> +#define MTK_ISO_THRESHOLD      264
> +
>  struct btmtk_patch_header {
>         u8 datetime[16];
>         u8 platform[4];
> @@ -963,6 +966,300 @@ int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
>  }
>  EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl);
>
> +static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff *skb)
> +{
> +       if (skb->len > MTK_ISO_THRESHOLD)
> +               return -EINVAL;
> +
> +       if (skb_pad(skb, MTK_ISO_THRESHOLD - skb->len))
> +               return -ENOMEM;
> +
> +       __skb_put(skb, MTK_ISO_THRESHOLD - skb->len);
> +
> +       return 0;
> +}
> +
> +static int __set_mtk_intr_interface(struct hci_dev *hdev)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +       struct usb_interface *intf = btmtk_data->isopkt_intf;
> +       int i, err;
> +
> +       if (!btmtk_data->isopkt_intf)
> +               return -ENODEV;
> +
> +       err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM, 1);
> +       if (err < 0) {
> +               bt_dev_err(hdev, "setting interface failed (%d)", -err);
> +               return err;
> +       }
> +
> +       btmtk_data->isopkt_tx_ep = NULL;
> +       btmtk_data->isopkt_rx_ep = NULL;
> +
> +       for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
> +               struct usb_endpoint_descriptor *ep_desc;
> +
> +               ep_desc = &intf->cur_altsetting->endpoint[i].desc;
> +
> +               if (!btmtk_data->isopkt_tx_ep &&
> +                   usb_endpoint_is_int_out(ep_desc)) {
> +                       btmtk_data->isopkt_tx_ep = ep_desc;
> +                       continue;
> +               }
> +
> +               if (!btmtk_data->isopkt_rx_ep &&
> +                   usb_endpoint_is_int_in(ep_desc)) {
> +                       btmtk_data->isopkt_rx_ep = ep_desc;
> +                       continue;
> +               }
> +       }
> +
> +       if (!btmtk_data->isopkt_tx_ep ||
> +           !btmtk_data->isopkt_rx_ep) {
> +               bt_dev_err(hdev, "invalid interrupt descriptors");
> +               return -ENODEV;
> +       }
> +
> +       return 0;
> +}
> +
> +struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
> +                              usb_complete_t tx_complete)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +       struct urb *urb;
> +       unsigned int pipe;
> +
> +       if (!btmtk_data->isopkt_tx_ep)
> +               return ERR_PTR(-ENODEV);
> +
> +       urb = usb_alloc_urb(0, GFP_KERNEL);
> +       if (!urb)
> +               return ERR_PTR(-ENOMEM);
> +
> +       if (btmtk_isopkt_pad(hdev, skb))
> +               return ERR_PTR(-EINVAL);
> +
> +       pipe = usb_sndintpipe(btmtk_data->udev,
> +                             btmtk_data->isopkt_tx_ep->bEndpointAddress);
> +
> +       usb_fill_int_urb(urb, btmtk_data->udev, pipe,
> +                        skb->data, skb->len, tx_complete,
> +                        skb, btmtk_data->isopkt_tx_ep->bInterval);
> +
> +       skb->dev = (void *)hdev;
> +
> +       return urb;
> +}
> +EXPORT_SYMBOL_GPL(alloc_mtk_intr_urb);
> +
> +static int btmtk_recv_isopkt(struct hci_dev *hdev, void *buffer, int count)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +       struct sk_buff *skb;
> +       unsigned long flags;
> +       int err = 0;
> +
> +       spin_lock_irqsave(&btmtk_data->isorxlock, flags);
> +       skb = btmtk_data->isopkt_skb;
> +
> +       while (count) {
> +               int len;
> +
> +               if (!skb) {
> +                       skb = bt_skb_alloc(HCI_MAX_ISO_SIZE, GFP_ATOMIC);
> +                       if (!skb) {
> +                               err = -ENOMEM;
> +                               break;
> +                       }
> +
> +                       hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
> +                       hci_skb_expect(skb) = HCI_ISO_HDR_SIZE;
> +               }
> +
> +               len = min_t(uint, hci_skb_expect(skb), count);
> +               skb_put_data(skb, buffer, len);
> +
> +               count -= len;
> +               buffer += len;
> +               hci_skb_expect(skb) -= len;
> +
> +               if (skb->len == HCI_ISO_HDR_SIZE) {
> +                       __le16 dlen = ((struct hci_iso_hdr *)skb->data)->dlen;
> +
> +                       /* Complete ISO header */
> +                       hci_skb_expect(skb) = __le16_to_cpu(dlen);
> +
> +                       if (skb_tailroom(skb) < hci_skb_expect(skb)) {
> +                               kfree_skb(skb);
> +                               skb = NULL;
> +
> +                               err = -EILSEQ;
> +                               break;
> +                       }
> +               }
> +
> +               if (!hci_skb_expect(skb)) {
> +                       /* Complete frame */
> +                       hci_recv_frame(hdev, skb);
> +                       skb = NULL;
> +               }
> +       }
> +
> +       btmtk_data->isopkt_skb = skb;
> +       spin_unlock_irqrestore(&btmtk_data->isorxlock, flags);
> +
> +       return err;
> +}
> +
> +static void btmtk_intr_complete(struct urb *urb)
> +{
> +       struct hci_dev *hdev = urb->context;
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +       int err;
> +
> +       BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
> +              urb->actual_length);
> +
> +       if (!test_bit(HCI_RUNNING, &hdev->flags))
> +               return;
> +
> +       if (hdev->suspended)
> +               return;
> +
> +       if (urb->status == 0) {
> +               hdev->stat.byte_rx += urb->actual_length;
> +
> +               if (btmtk_recv_isopkt(hdev, urb->transfer_buffer,
> +                                     urb->actual_length) < 0) {
> +                       bt_dev_err(hdev, "corrupted iso packet");
> +                       hdev->stat.err_rx++;
> +               }
> +       } else if (urb->status == -ENOENT) {
> +               /* Avoid suspend failed when usb_kill_urb */
> +               return;
> +       }
> +
> +       usb_mark_last_busy(btmtk_data->udev);
> +       usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
> +
> +       err = usb_submit_urb(urb, GFP_ATOMIC);
> +       if (err < 0) {
> +               /* -EPERM: urb is being killed;
> +                * -ENODEV: device got disconnected
> +                */
> +               if (err != -EPERM && err != -ENODEV)
> +                       bt_dev_err(hdev, "urb %p failed to resubmit (%d)",
> +                                  urb, -err);
> +               if (err != -EPERM)
> +                       hci_cmd_sync_cancel(hdev, -err);
> +               usb_unanchor_urb(urb);
> +       }
> +}
> +
> +static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +       unsigned char *buf;
> +       unsigned int pipe;
> +       struct urb *urb;
> +       int err, size;
> +
> +       BT_DBG("%s", hdev->name);
> +
> +       if (!btmtk_data->isopkt_rx_ep)
> +               return -ENODEV;
> +
> +       urb = usb_alloc_urb(0, mem_flags);
> +       if (!urb)
> +               return -ENOMEM;
> +       size = le16_to_cpu(btmtk_data->isopkt_rx_ep->wMaxPacketSize);
> +
> +       buf = kmalloc(size, mem_flags);
> +       if (!buf) {
> +               usb_free_urb(urb);
> +               return -ENOMEM;
> +       }
> +
> +       pipe = usb_rcvintpipe(btmtk_data->udev,
> +                             btmtk_data->isopkt_rx_ep->bEndpointAddress);
> +
> +       usb_fill_int_urb(urb, btmtk_data->udev, pipe, buf, size,
> +                        btmtk_intr_complete, hdev,
> +                        btmtk_data->isopkt_rx_ep->bInterval);
> +
> +       urb->transfer_flags |= URB_FREE_BUFFER;
> +
> +       usb_mark_last_busy(btmtk_data->udev);
> +       usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
> +
> +       err = usb_submit_urb(urb, mem_flags);
> +       if (err < 0) {
> +               if (err != -EPERM && err != -ENODEV)
> +                       bt_dev_err(hdev, "urb %p submission failed (%d)",
> +                                  urb, -err);
> +               usb_unanchor_urb(urb);
> +       }
> +
> +       usb_free_urb(urb);
> +
> +       return err;
> +}
> +
> +static int btmtk_usb_isointf_init(struct hci_dev *hdev)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +       u8 iso_param[2] = { 0x08, 0x01 };
> +       struct sk_buff *skb;
> +       int err;
> +
> +       init_usb_anchor(&btmtk_data->isopkt_anchor);
> +       spin_lock_init(&btmtk_data->isorxlock);
> +
> +       __set_mtk_intr_interface(hdev);
> +
> +       err = btmtk_submit_intr_urb(hdev, GFP_KERNEL);
> +       if (err < 0) {
> +               btmtk_usb_isopkt_stop(hdev);
> +               bt_dev_err(hdev, "ISO intf not support (%d)", err);
> +               return err;
> +       }
> +
> +       skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param), iso_param,
> +                            HCI_INIT_TIMEOUT);
> +       if (IS_ERR(skb)) {
> +               bt_dev_err(hdev, "Failed to apply iso setting (%ld)", PTR_ERR(skb));
> +               return PTR_ERR(skb);
> +       }
> +       kfree_skb(skb);
> +
> +       return 0;
> +}
> +
> +int btmtk_usb_isopkt_start(struct hci_dev *hdev)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +
> +       if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) {
> +               if (btmtk_submit_intr_urb(hdev, GFP_NOIO) < 0)
> +                       clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
> +       }
> +
> +       return 0;
> +}
> +EXPORT_SYMBOL_GPL(btmtk_usb_isopkt_start);
> +
> +int btmtk_usb_isopkt_stop(struct hci_dev *hdev)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +
> +       usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
> +
> +       return 0;
> +}
> +EXPORT_SYMBOL_GPL(btmtk_usb_isopkt_stop);
> +
>  int btmtk_usb_setup(struct hci_dev *hdev)
>  {
>         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> @@ -1064,6 +1361,12 @@ int btmtk_usb_setup(struct hci_dev *hdev)
>                 hci_set_msft_opcode(hdev, 0xFD30);
>                 hci_set_aosp_capable(hdev);
>
> +               /* Set up ISO interface after protocol enabled */
> +               if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags)) {
> +                       if (!btmtk_usb_isointf_init(hdev))
> +                               set_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
> +               }
> +
>                 goto done;
>         default:
>                 bt_dev_err(hdev, "Unsupported hardware variant (%08x)",
> diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
> index 47193b867b9f..b88b599018fa 100644
> --- a/drivers/bluetooth/btmtk.h
> +++ b/drivers/bluetooth/btmtk.h
> @@ -40,6 +40,9 @@
>  #define MTK_BT_RESET_REG_CONNV3        0x70028610
>  #define MTK_BT_READ_DEV_ID     0x70010200
>
> +/* MediaTek ISO Interface */
> +#define MTK_ISO_IFNUM          2
> +
>  enum {
>         BTMTK_WMT_PATCH_DWNLD = 0x1,
>         BTMTK_WMT_TEST = 0x2,
> @@ -142,6 +145,8 @@ enum {
>         BTMTK_TX_WAIT_VND_EVT,
>         BTMTK_FIRMWARE_LOADED,
>         BTMTK_HW_RESET_ACTIVE,
> +       BTMTK_ISOPKT_OVER_INTR,
> +       BTMTK_ISOPKT_RUNNING,
>  };
>
>  typedef int (*btmtk_reset_sync_func_t)(struct hci_dev *, void *);
> @@ -164,6 +169,14 @@ struct btmtk_data {
>         struct usb_interface *intf;
>         struct usb_anchor *ctrl_anchor;
>         struct sk_buff *evt_skb;
> +       struct usb_endpoint_descriptor *isopkt_tx_ep;
> +       struct usb_endpoint_descriptor *isopkt_rx_ep;
> +       struct usb_interface *isopkt_intf;
> +       struct usb_anchor isopkt_anchor;
> +       struct sk_buff *isopkt_skb;
> +
> +       /* spinlock for ISO data transmission */
> +       spinlock_t isorxlock;
>  };
>
>  typedef int (*wmt_cmd_sync_func_t)(struct hci_dev *,
> @@ -193,6 +206,13 @@ int btmtk_usb_subsys_reset(struct hci_dev *hdev, u32 dev_id);
>
>  int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb);
>
> +struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
> +                              usb_complete_t tx_complete);
> +
> +int btmtk_usb_isopkt_start(struct hci_dev *hdev);
> +
> +int btmtk_usb_isopkt_stop(struct hci_dev *hdev);
> +
>  int btmtk_usb_setup(struct hci_dev *hdev);
>
>  int btmtk_usb_shutdown(struct hci_dev *hdev);
> @@ -246,6 +266,22 @@ static int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
>         return -EOPNOTSUPP;
>  }
>
> +static struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct sk_buff *skb,
> +                                     usb_complete_t tx_complete)
> +{
> +       return ERR_PTR(-EOPNOTSUPP);
> +}
> +
> +static int btmtk_usb_isopkt_start(struct hci_dev *hdev)
> +{
> +       return -EOPNOTSUPP;
> +}
> +
> +static int btmtk_usb_isopkt_stop(struct hci_dev *hdev)
> +{
> +       return -EOPNOTSUPP;
> +}
> +
>  static int btmtk_usb_setup(struct hci_dev *hdev)
>  {
>         return -EOPNOTSUPP;
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index 5de50c835964..590602dce3f8 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -2641,6 +2641,40 @@ static int btusb_recv_event_realtek(struct hci_dev *hdev, struct sk_buff *skb)
>         return hci_recv_frame(hdev, skb);
>  }
>
> +static void btusb_mtk_claim_iso_intf(struct btusb_data *data)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(data->hdev);
> +       int err;
> +
> +       err = usb_driver_claim_interface(&btusb_driver,
> +                                        btmtk_data->isopkt_intf, data);
> +       if (err < 0) {
> +               btmtk_data->isopkt_intf = NULL;
> +               bt_dev_err(data->hdev, "Failed to claim iso interface");
> +               return;
> +       }
> +
> +       set_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags);
> +}
> +
> +static void btusb_mtk_release_iso_intf(struct btusb_data *data)
> +{
> +       struct btmtk_data *btmtk_data = hci_get_priv(data->hdev);
> +
> +       if (btmtk_data->isopkt_intf) {
> +               btmtk_usb_isopkt_stop(data->hdev);
> +               clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags);
> +
> +               dev_kfree_skb_irq(btmtk_data->isopkt_skb);
> +               btmtk_data->isopkt_skb = NULL;
> +               usb_set_intfdata(btmtk_data->isopkt_intf, NULL);
> +               usb_driver_release_interface(&btusb_driver,
> +                                            btmtk_data->isopkt_intf);
> +       }
> +
> +       clear_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags);
> +}
> +
>  static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
>  {
>         struct btusb_data *data = hci_get_drvdata(hdev);
> @@ -2657,6 +2691,9 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
>         if (err < 0)
>                 return err;
>
> +       if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags))
> +               btusb_mtk_release_iso_intf(data);
> +
>         btusb_stop_traffic(data);
>         usb_kill_anchored_urbs(&data->tx_anchor);
>
> @@ -2668,6 +2705,23 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
>         return err;
>  }
>
> +static int btusb_send_frame_mtk(struct hci_dev *hdev, struct sk_buff *skb)
> +{
> +       struct urb *urb;
> +
> +       BT_DBG("%s", hdev->name);
> +
> +       if (hci_skb_pkt_type(skb) == HCI_ISODATA_PKT) {
> +               urb = alloc_mtk_intr_urb(hdev, skb, btusb_tx_complete);
> +               if (IS_ERR(urb))
> +                       return PTR_ERR(urb);
> +
> +               return submit_or_queue_tx_urb(hdev, urb);
> +       } else {
> +               return btusb_send_frame(hdev, skb);
> +       }
> +}
> +
>  static int btusb_mtk_setup(struct hci_dev *hdev)
>  {
>         struct btusb_data *data = hci_get_drvdata(hdev);
> @@ -2682,11 +2736,22 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
>         btmtk_data->ctrl_anchor = &data->ctrl_anchor;
>         btmtk_data->reset_sync = btusb_mtk_reset;
>
> +       /* Claim ISO data interface and endpoint */
> +       btmtk_data->isopkt_intf = usb_ifnum_to_if(data->udev, MTK_ISO_IFNUM);
> +       if (btmtk_data->isopkt_intf)
> +               btusb_mtk_claim_iso_intf(data);
> +
>         return btmtk_usb_setup(hdev);
>  }
>
>  static int btusb_mtk_shutdown(struct hci_dev *hdev)
>  {
> +       struct btusb_data *data = hci_get_drvdata(hdev);
> +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> +
> +       if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags))
> +               btusb_mtk_release_iso_intf(data);
> +
>         return btmtk_usb_shutdown(hdev);
>  }
>
> @@ -3793,9 +3858,12 @@ static int btusb_probe(struct usb_interface *intf,
>                 hdev->manufacturer = 70;
>                 hdev->cmd_timeout = btmtk_reset_sync;
>                 hdev->set_bdaddr = btmtk_set_bdaddr;
> +               hdev->send = btusb_send_frame_mtk;
>                 set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &hdev->quirks);
>                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
>                 data->recv_acl = btmtk_usb_recv_acl;
> +               data->suspend = btmtk_usb_isopkt_stop;
> +               data->resume = btmtk_usb_isopkt_start;

Small nitpick, although it is just cleaning up the iso endpoint the
suspend and resume shall probably be named more generically, e.g:
btmtk_usb_suspend, etc, so later if you need to add more code we don't
need to rename the function names.

>         }
>
>         if (id->driver_info & BTUSB_SWAVE) {
> --
> 2.18.0
>


-- 
Luiz Augusto von Dentz

Re: [PATCH v6 8/8] Bluetooth: btusb: mediatek: add ISO data transmission functions

[Chris Lu (陸稚泓)]

Hi Luiz,

On Tue, 2024-07-02 at 14:22 -0400, Luiz Augusto von Dentz
wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  Hi Chris,
> 
> On Tue, Jul 2, 2024 at 7:31 AM Chris Lu <chris.lu@mediatek.com>
> wrote:
> >
> > This patch implements functions for ISO data send and receive in
> btusb
> > driver for MediaTek's controller.
> >
> > MediaTek defines a specific interrupt endpoint for ISO data
> transmissin
> > because the characteristics of interrupt endpoint are similar to
> the
> > application of ISO data which can support guaranteed transmissin
> > bandwidth, enough maximum data length and error checking mechanism.
> >
> > Driver sets up ISO interface and endpoints in btusb_mtk_setup and
> clears
> > the setup in btusb_mtk_shutdown. These flow can't move to btmtk.c
> due to
> > btusb_driver is only defined in btusb.c when claiming/relaesing
> interface.
> > ISO packet anchor stops when driver suspending and resubmit
> interrupt urb
> > for ISO data when driver resuming.
> >
> > Signed-off-by: Chris Lu <chris.lu@mediatek.com>
> > ---
> >  drivers/bluetooth/btmtk.c | 303
> ++++++++++++++++++++++++++++++++++++++
> >  drivers/bluetooth/btmtk.h |  36 +++++
> >  drivers/bluetooth/btusb.c |  68 +++++++++
> >  3 files changed, 407 insertions(+)
> >
> > diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c
> > index fe3b892f6c6e..dfeae9c283a9 100644
> > --- a/drivers/bluetooth/btmtk.c
> > +++ b/drivers/bluetooth/btmtk.c
> > @@ -22,6 +22,9 @@
> >  #define MTK_SEC_MAP_COMMON_SIZE        12
> >  #define MTK_SEC_MAP_NEED_SEND_SIZE     52
> >
> > +/* It is for mt79xx iso data transmission setting */
> > +#define MTK_ISO_THRESHOLD      264
> > +
> >  struct btmtk_patch_header {
> >         u8 datetime[16];
> >         u8 platform[4];
> > @@ -963,6 +966,300 @@ int btmtk_usb_recv_acl(struct hci_dev *hdev,
> struct sk_buff *skb)
> >  }
> >  EXPORT_SYMBOL_GPL(btmtk_usb_recv_acl);
> >
> > +static int btmtk_isopkt_pad(struct hci_dev *hdev, struct sk_buff
> *skb)
> > +{
> > +       if (skb->len > MTK_ISO_THRESHOLD)
> > +               return -EINVAL;
> > +
> > +       if (skb_pad(skb, MTK_ISO_THRESHOLD - skb->len))
> > +               return -ENOMEM;
> > +
> > +       __skb_put(skb, MTK_ISO_THRESHOLD - skb->len);
> > +
> > +       return 0;
> > +}
> > +
> > +static int __set_mtk_intr_interface(struct hci_dev *hdev)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +       struct usb_interface *intf = btmtk_data->isopkt_intf;
> > +       int i, err;
> > +
> > +       if (!btmtk_data->isopkt_intf)
> > +               return -ENODEV;
> > +
> > +       err = usb_set_interface(btmtk_data->udev, MTK_ISO_IFNUM,
> 1);
> > +       if (err < 0) {
> > +               bt_dev_err(hdev, "setting interface failed (%d)",
> -err);
> > +               return err;
> > +       }
> > +
> > +       btmtk_data->isopkt_tx_ep = NULL;
> > +       btmtk_data->isopkt_rx_ep = NULL;
> > +
> > +       for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints;
> i++) {
> > +               struct usb_endpoint_descriptor *ep_desc;
> > +
> > +               ep_desc = &intf->cur_altsetting->endpoint[i].desc;
> > +
> > +               if (!btmtk_data->isopkt_tx_ep &&
> > +                   usb_endpoint_is_int_out(ep_desc)) {
> > +                       btmtk_data->isopkt_tx_ep = ep_desc;
> > +                       continue;
> > +               }
> > +
> > +               if (!btmtk_data->isopkt_rx_ep &&
> > +                   usb_endpoint_is_int_in(ep_desc)) {
> > +                       btmtk_data->isopkt_rx_ep = ep_desc;
> > +                       continue;
> > +               }
> > +       }
> > +
> > +       if (!btmtk_data->isopkt_tx_ep ||
> > +           !btmtk_data->isopkt_rx_ep) {
> > +               bt_dev_err(hdev, "invalid interrupt descriptors");
> > +               return -ENODEV;
> > +       }
> > +
> > +       return 0;
> > +}
> > +
> > +struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct
> sk_buff *skb,
> > +                              usb_complete_t tx_complete)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +       struct urb *urb;
> > +       unsigned int pipe;
> > +
> > +       if (!btmtk_data->isopkt_tx_ep)
> > +               return ERR_PTR(-ENODEV);
> > +
> > +       urb = usb_alloc_urb(0, GFP_KERNEL);
> > +       if (!urb)
> > +               return ERR_PTR(-ENOMEM);
> > +
> > +       if (btmtk_isopkt_pad(hdev, skb))
> > +               return ERR_PTR(-EINVAL);
> > +
> > +       pipe = usb_sndintpipe(btmtk_data->udev,
> > +                             btmtk_data->isopkt_tx_ep-
> >bEndpointAddress);
> > +
> > +       usb_fill_int_urb(urb, btmtk_data->udev, pipe,
> > +                        skb->data, skb->len, tx_complete,
> > +                        skb, btmtk_data->isopkt_tx_ep->bInterval);
> > +
> > +       skb->dev = (void *)hdev;
> > +
> > +       return urb;
> > +}
> > +EXPORT_SYMBOL_GPL(alloc_mtk_intr_urb);
> > +
> > +static int btmtk_recv_isopkt(struct hci_dev *hdev, void *buffer,
> int count)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +       struct sk_buff *skb;
> > +       unsigned long flags;
> > +       int err = 0;
> > +
> > +       spin_lock_irqsave(&btmtk_data->isorxlock, flags);
> > +       skb = btmtk_data->isopkt_skb;
> > +
> > +       while (count) {
> > +               int len;
> > +
> > +               if (!skb) {
> > +                       skb = bt_skb_alloc(HCI_MAX_ISO_SIZE,
> GFP_ATOMIC);
> > +                       if (!skb) {
> > +                               err = -ENOMEM;
> > +                               break;
> > +                       }
> > +
> > +                       hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
> > +                       hci_skb_expect(skb) = HCI_ISO_HDR_SIZE;
> > +               }
> > +
> > +               len = min_t(uint, hci_skb_expect(skb), count);
> > +               skb_put_data(skb, buffer, len);
> > +
> > +               count -= len;
> > +               buffer += len;
> > +               hci_skb_expect(skb) -= len;
> > +
> > +               if (skb->len == HCI_ISO_HDR_SIZE) {
> > +                       __le16 dlen = ((struct hci_iso_hdr *)skb-
> >data)->dlen;
> > +
> > +                       /* Complete ISO header */
> > +                       hci_skb_expect(skb) = __le16_to_cpu(dlen);
> > +
> > +                       if (skb_tailroom(skb) <
> hci_skb_expect(skb)) {
> > +                               kfree_skb(skb);
> > +                               skb = NULL;
> > +
> > +                               err = -EILSEQ;
> > +                               break;
> > +                       }
> > +               }
> > +
> > +               if (!hci_skb_expect(skb)) {
> > +                       /* Complete frame */
> > +                       hci_recv_frame(hdev, skb);
> > +                       skb = NULL;
> > +               }
> > +       }
> > +
> > +       btmtk_data->isopkt_skb = skb;
> > +       spin_unlock_irqrestore(&btmtk_data->isorxlock, flags);
> > +
> > +       return err;
> > +}
> > +
> > +static void btmtk_intr_complete(struct urb *urb)
> > +{
> > +       struct hci_dev *hdev = urb->context;
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +       int err;
> > +
> > +       BT_DBG("%s urb %p status %d count %d", hdev->name, urb,
> urb->status,
> > +              urb->actual_length);
> > +
> > +       if (!test_bit(HCI_RUNNING, &hdev->flags))
> > +               return;
> > +
> > +       if (hdev->suspended)
> > +               return;
> > +
> > +       if (urb->status == 0) {
> > +               hdev->stat.byte_rx += urb->actual_length;
> > +
> > +               if (btmtk_recv_isopkt(hdev, urb->transfer_buffer,
> > +                                     urb->actual_length) < 0) {
> > +                       bt_dev_err(hdev, "corrupted iso packet");
> > +                       hdev->stat.err_rx++;
> > +               }
> > +       } else if (urb->status == -ENOENT) {
> > +               /* Avoid suspend failed when usb_kill_urb */
> > +               return;
> > +       }
> > +
> > +       usb_mark_last_busy(btmtk_data->udev);
> > +       usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
> > +
> > +       err = usb_submit_urb(urb, GFP_ATOMIC);
> > +       if (err < 0) {
> > +               /* -EPERM: urb is being killed;
> > +                * -ENODEV: device got disconnected
> > +                */
> > +               if (err != -EPERM && err != -ENODEV)
> > +                       bt_dev_err(hdev, "urb %p failed to resubmit
> (%d)",
> > +                                  urb, -err);
> > +               if (err != -EPERM)
> > +                       hci_cmd_sync_cancel(hdev, -err);
> > +               usb_unanchor_urb(urb);
> > +       }
> > +}
> > +
> > +static int btmtk_submit_intr_urb(struct hci_dev *hdev, gfp_t
> mem_flags)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +       unsigned char *buf;
> > +       unsigned int pipe;
> > +       struct urb *urb;
> > +       int err, size;
> > +
> > +       BT_DBG("%s", hdev->name);
> > +
> > +       if (!btmtk_data->isopkt_rx_ep)
> > +               return -ENODEV;
> > +
> > +       urb = usb_alloc_urb(0, mem_flags);
> > +       if (!urb)
> > +               return -ENOMEM;
> > +       size = le16_to_cpu(btmtk_data->isopkt_rx_ep-
> >wMaxPacketSize);
> > +
> > +       buf = kmalloc(size, mem_flags);
> > +       if (!buf) {
> > +               usb_free_urb(urb);
> > +               return -ENOMEM;
> > +       }
> > +
> > +       pipe = usb_rcvintpipe(btmtk_data->udev,
> > +                             btmtk_data->isopkt_rx_ep-
> >bEndpointAddress);
> > +
> > +       usb_fill_int_urb(urb, btmtk_data->udev, pipe, buf, size,
> > +                        btmtk_intr_complete, hdev,
> > +                        btmtk_data->isopkt_rx_ep->bInterval);
> > +
> > +       urb->transfer_flags |= URB_FREE_BUFFER;
> > +
> > +       usb_mark_last_busy(btmtk_data->udev);
> > +       usb_anchor_urb(urb, &btmtk_data->isopkt_anchor);
> > +
> > +       err = usb_submit_urb(urb, mem_flags);
> > +       if (err < 0) {
> > +               if (err != -EPERM && err != -ENODEV)
> > +                       bt_dev_err(hdev, "urb %p submission failed
> (%d)",
> > +                                  urb, -err);
> > +               usb_unanchor_urb(urb);
> > +       }
> > +
> > +       usb_free_urb(urb);
> > +
> > +       return err;
> > +}
> > +
> > +static int btmtk_usb_isointf_init(struct hci_dev *hdev)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +       u8 iso_param[2] = { 0x08, 0x01 };
> > +       struct sk_buff *skb;
> > +       int err;
> > +
> > +       init_usb_anchor(&btmtk_data->isopkt_anchor);
> > +       spin_lock_init(&btmtk_data->isorxlock);
> > +
> > +       __set_mtk_intr_interface(hdev);
> > +
> > +       err = btmtk_submit_intr_urb(hdev, GFP_KERNEL);
> > +       if (err < 0) {
> > +               btmtk_usb_isopkt_stop(hdev);
> > +               bt_dev_err(hdev, "ISO intf not support (%d)", err);
> > +               return err;
> > +       }
> > +
> > +       skb = __hci_cmd_sync(hdev, 0xfd98, sizeof(iso_param),
> iso_param,
> > +                            HCI_INIT_TIMEOUT);
> > +       if (IS_ERR(skb)) {
> > +               bt_dev_err(hdev, "Failed to apply iso setting
> (%ld)", PTR_ERR(skb));
> > +               return PTR_ERR(skb);
> > +       }
> > +       kfree_skb(skb);
> > +
> > +       return 0;
> > +}
> > +
> > +int btmtk_usb_isopkt_start(struct hci_dev *hdev)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +
> > +       if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) {
> > +               if (btmtk_submit_intr_urb(hdev, GFP_NOIO) < 0)
> > +                       clear_bit(BTMTK_ISOPKT_RUNNING,
> &btmtk_data->flags);
> > +       }
> > +
> > +       return 0;
> > +}
> > +EXPORT_SYMBOL_GPL(btmtk_usb_isopkt_start);
> > +
> > +int btmtk_usb_isopkt_stop(struct hci_dev *hdev)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +
> > +       usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor);
> > +
> > +       return 0;
> > +}
> > +EXPORT_SYMBOL_GPL(btmtk_usb_isopkt_stop);
> > +
> >  int btmtk_usb_setup(struct hci_dev *hdev)
> >  {
> >         struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > @@ -1064,6 +1361,12 @@ int btmtk_usb_setup(struct hci_dev *hdev)
> >                 hci_set_msft_opcode(hdev, 0xFD30);
> >                 hci_set_aosp_capable(hdev);
> >
> > +               /* Set up ISO interface after protocol enabled */
> > +               if (test_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data-
> >flags)) {
> > +                       if (!btmtk_usb_isointf_init(hdev))
> > +                               set_bit(BTMTK_ISOPKT_RUNNING,
> &btmtk_data->flags);
> > +               }
> > +
> >                 goto done;
> >         default:
> >                 bt_dev_err(hdev, "Unsupported hardware variant
> (%08x)",
> > diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
> > index 47193b867b9f..b88b599018fa 100644
> > --- a/drivers/bluetooth/btmtk.h
> > +++ b/drivers/bluetooth/btmtk.h
> > @@ -40,6 +40,9 @@
> >  #define MTK_BT_RESET_REG_CONNV3        0x70028610
> >  #define MTK_BT_READ_DEV_ID     0x70010200
> >
> > +/* MediaTek ISO Interface */
> > +#define MTK_ISO_IFNUM          2
> > +
> >  enum {
> >         BTMTK_WMT_PATCH_DWNLD = 0x1,
> >         BTMTK_WMT_TEST = 0x2,
> > @@ -142,6 +145,8 @@ enum {
> >         BTMTK_TX_WAIT_VND_EVT,
> >         BTMTK_FIRMWARE_LOADED,
> >         BTMTK_HW_RESET_ACTIVE,
> > +       BTMTK_ISOPKT_OVER_INTR,
> > +       BTMTK_ISOPKT_RUNNING,
> >  };
> >
> >  typedef int (*btmtk_reset_sync_func_t)(struct hci_dev *, void *);
> > @@ -164,6 +169,14 @@ struct btmtk_data {
> >         struct usb_interface *intf;
> >         struct usb_anchor *ctrl_anchor;
> >         struct sk_buff *evt_skb;
> > +       struct usb_endpoint_descriptor *isopkt_tx_ep;
> > +       struct usb_endpoint_descriptor *isopkt_rx_ep;
> > +       struct usb_interface *isopkt_intf;
> > +       struct usb_anchor isopkt_anchor;
> > +       struct sk_buff *isopkt_skb;
> > +
> > +       /* spinlock for ISO data transmission */
> > +       spinlock_t isorxlock;
> >  };
> >
> >  typedef int (*wmt_cmd_sync_func_t)(struct hci_dev *,
> > @@ -193,6 +206,13 @@ int btmtk_usb_subsys_reset(struct hci_dev
> *hdev, u32 dev_id);
> >
> >  int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb);
> >
> > +struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct
> sk_buff *skb,
> > +                              usb_complete_t tx_complete);
> > +
> > +int btmtk_usb_isopkt_start(struct hci_dev *hdev);
> > +
> > +int btmtk_usb_isopkt_stop(struct hci_dev *hdev);
> > +
> >  int btmtk_usb_setup(struct hci_dev *hdev);
> >
> >  int btmtk_usb_shutdown(struct hci_dev *hdev);
> > @@ -246,6 +266,22 @@ static int btmtk_usb_recv_acl(struct hci_dev
> *hdev, struct sk_buff *skb)
> >         return -EOPNOTSUPP;
> >  }
> >
> > +static struct urb *alloc_mtk_intr_urb(struct hci_dev *hdev, struct
> sk_buff *skb,
> > +                                     usb_complete_t tx_complete)
> > +{
> > +       return ERR_PTR(-EOPNOTSUPP);
> > +}
> > +
> > +static int btmtk_usb_isopkt_start(struct hci_dev *hdev)
> > +{
> > +       return -EOPNOTSUPP;
> > +}
> > +
> > +static int btmtk_usb_isopkt_stop(struct hci_dev *hdev)
> > +{
> > +       return -EOPNOTSUPP;
> > +}
> > +
> >  static int btmtk_usb_setup(struct hci_dev *hdev)
> >  {
> >         return -EOPNOTSUPP;
> > diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> > index 5de50c835964..590602dce3f8 100644
> > --- a/drivers/bluetooth/btusb.c
> > +++ b/drivers/bluetooth/btusb.c
> > @@ -2641,6 +2641,40 @@ static int btusb_recv_event_realtek(struct
> hci_dev *hdev, struct sk_buff *skb)
> >         return hci_recv_frame(hdev, skb);
> >  }
> >
> > +static void btusb_mtk_claim_iso_intf(struct btusb_data *data)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(data->hdev);
> > +       int err;
> > +
> > +       err = usb_driver_claim_interface(&btusb_driver,
> > +                                        btmtk_data->isopkt_intf,
> data);
> > +       if (err < 0) {
> > +               btmtk_data->isopkt_intf = NULL;
> > +               bt_dev_err(data->hdev, "Failed to claim iso
> interface");
> > +               return;
> > +       }
> > +
> > +       set_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags);
> > +}
> > +
> > +static void btusb_mtk_release_iso_intf(struct btusb_data *data)
> > +{
> > +       struct btmtk_data *btmtk_data = hci_get_priv(data->hdev);
> > +
> > +       if (btmtk_data->isopkt_intf) {
> > +               btmtk_usb_isopkt_stop(data->hdev);
> > +               clear_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data-
> >flags);
> > +
> > +               dev_kfree_skb_irq(btmtk_data->isopkt_skb);
> > +               btmtk_data->isopkt_skb = NULL;
> > +               usb_set_intfdata(btmtk_data->isopkt_intf, NULL);
> > +               usb_driver_release_interface(&btusb_driver,
> > +                                            btmtk_data-
> >isopkt_intf);
> > +       }
> > +
> > +       clear_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags);
> > +}
> > +
> >  static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data)
> >  {
> >         struct btusb_data *data = hci_get_drvdata(hdev);
> > @@ -2657,6 +2691,9 @@ static int btusb_mtk_reset(struct hci_dev
> *hdev, void *rst_data)
> >         if (err < 0)
> >                 return err;
> >
> > +       if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags))
> > +               btusb_mtk_release_iso_intf(data);
> > +
> >         btusb_stop_traffic(data);
> >         usb_kill_anchored_urbs(&data->tx_anchor);
> >
> > @@ -2668,6 +2705,23 @@ static int btusb_mtk_reset(struct hci_dev
> *hdev, void *rst_data)
> >         return err;
> >  }
> >
> > +static int btusb_send_frame_mtk(struct hci_dev *hdev, struct
> sk_buff *skb)
> > +{
> > +       struct urb *urb;
> > +
> > +       BT_DBG("%s", hdev->name);
> > +
> > +       if (hci_skb_pkt_type(skb) == HCI_ISODATA_PKT) {
> > +               urb = alloc_mtk_intr_urb(hdev, skb,
> btusb_tx_complete);
> > +               if (IS_ERR(urb))
> > +                       return PTR_ERR(urb);
> > +
> > +               return submit_or_queue_tx_urb(hdev, urb);
> > +       } else {
> > +               return btusb_send_frame(hdev, skb);
> > +       }
> > +}
> > +
> >  static int btusb_mtk_setup(struct hci_dev *hdev)
> >  {
> >         struct btusb_data *data = hci_get_drvdata(hdev);
> > @@ -2682,11 +2736,22 @@ static int btusb_mtk_setup(struct hci_dev
> *hdev)
> >         btmtk_data->ctrl_anchor = &data->ctrl_anchor;
> >         btmtk_data->reset_sync = btusb_mtk_reset;
> >
> > +       /* Claim ISO data interface and endpoint */
> > +       btmtk_data->isopkt_intf = usb_ifnum_to_if(data->udev,
> MTK_ISO_IFNUM);
> > +       if (btmtk_data->isopkt_intf)
> > +               btusb_mtk_claim_iso_intf(data);
> > +
> >         return btmtk_usb_setup(hdev);
> >  }
> >
> >  static int btusb_mtk_shutdown(struct hci_dev *hdev)
> >  {
> > +       struct btusb_data *data = hci_get_drvdata(hdev);
> > +       struct btmtk_data *btmtk_data = hci_get_priv(hdev);
> > +
> > +       if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags))
> > +               btusb_mtk_release_iso_intf(data);
> > +
> >         return btmtk_usb_shutdown(hdev);
> >  }
> >
> > @@ -3793,9 +3858,12 @@ static int btusb_probe(struct usb_interface
> *intf,
> >                 hdev->manufacturer = 70;
> >                 hdev->cmd_timeout = btmtk_reset_sync;
> >                 hdev->set_bdaddr = btmtk_set_bdaddr;
> > +               hdev->send = btusb_send_frame_mtk;
> >                 set_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN,
> &hdev->quirks);
> >                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev-
> >quirks);
> >                 data->recv_acl = btmtk_usb_recv_acl;
> > +               data->suspend = btmtk_usb_isopkt_stop;
> > +               data->resume = btmtk_usb_isopkt_start;
> 
> Small nitpick, although it is just cleaning up the iso endpoint the
> suspend and resume shall probably be named more generically, e.g:
> btmtk_usb_suspend, etc, so later if you need to add more code we
> don't
> need to rename the function names.
> 
Thanks for your suggestion. Indeed, change a naming will get a better
scalability in the future if there is another action need to be added
during suspend and resume. I'll review the function naming again and
add some comment to ensure our member can understand these section.

Thanks,
Chris Lu
> >         }
> >
> >         if (id->driver_info & BTUSB_SWAVE) {
> > --
> > 2.18.0
> >
> 
> 
> -- 
> Luiz Augusto von Dentz