1 files changed, 79 insertions, 7 deletions

diff --git a/drivers/bluetooth/hci_mrvl.c b/drivers/bluetooth/hci_mrvl.c
index eaa9c51cacfa..e08222395772 100644
--- a/drivers/bluetooth/hci_mrvl.c
+++ b/drivers/bluetooth/hci_mrvl.c
@@ -27,10 +27,12 @@
 #define MRVL_ACK 0x5A
 #define MRVL_NAK 0xBF
 #define MRVL_RAW_DATA 0x1F
+#define MRVL_SET_BAUDRATE 0xFC09
 
 enum {
 	STATE_CHIP_VER_PENDING,
 	STATE_FW_REQ_PENDING,
+	STATE_FW_LOADED,
 };
 
 struct mrvl_data {
@@ -254,6 +256,14 @@ static int mrvl_recv(struct hci_uart *hu, const void *data, int count)
 	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
 		return -EUNATCH;
 
+	/* We might receive some noise when there is no firmware loaded. Therefore,
+	 * we drop data if the firmware is not loaded yet and if there is no fw load
+	 * request pending.
+	 */
+	if (!test_bit(STATE_FW_REQ_PENDING, &mrvl->flags) &&
+				!test_bit(STATE_FW_LOADED, &mrvl->flags))
+		return count;
+
 	mrvl->rx_skb = h4_recv_buf(hu->hdev, mrvl->rx_skb, data, count,
 				    mrvl_recv_pkts,
 				    ARRAY_SIZE(mrvl_recv_pkts));
@@ -354,6 +364,7 @@ static int mrvl_load_firmware(struct hci_dev *hdev, const char *name)
 static int mrvl_setup(struct hci_uart *hu)
 {
 	int err;
+	struct mrvl_data *mrvl = hu->priv;
 
 	hci_uart_set_flow_control(hu, true);
 
@@ -367,9 +378,9 @@ static int mrvl_setup(struct hci_uart *hu)
 	hci_uart_wait_until_sent(hu);
 
 	if (hu->serdev)
-		serdev_device_set_baudrate(hu->serdev, 3000000);
+		serdev_device_set_baudrate(hu->serdev, hu->oper_speed);
 	else
-		hci_uart_set_baudrate(hu, 3000000);
+		hci_uart_set_baudrate(hu, hu->oper_speed);
 
 	hci_uart_set_flow_control(hu, false);
 
@@ -377,13 +388,54 @@ static int mrvl_setup(struct hci_uart *hu)
 	if (err)
 		return err;
 
+	set_bit(STATE_FW_LOADED, &mrvl->flags);
+
+	return 0;
+}
+
+static int mrvl_set_baudrate(struct hci_uart *hu, unsigned int speed)
+{
+	int err;
+	struct mrvl_data *mrvl = hu->priv;
+	__le32 speed_le = cpu_to_le32(speed);
+
+	/* The firmware might be loaded by the Wifi driver over SDIO. We wait
+	 * up to 10s for the CTS to go up. Afterward, we know that the firmware
+	 * is ready.
+	 */
+	err = serdev_device_wait_for_cts(hu->serdev, true, 10000);
+	if (err) {
+		bt_dev_err(hu->hdev, "Wait for CTS failed with %d\n", err);
+		return err;
+	}
+
+	set_bit(STATE_FW_LOADED, &mrvl->flags);
+
+	err = __hci_cmd_sync_status(hu->hdev, MRVL_SET_BAUDRATE,
+				    sizeof(speed_le), &speed_le,
+				    HCI_INIT_TIMEOUT);
+	if (err) {
+		bt_dev_err(hu->hdev, "send command failed: %d", err);
+		return err;
+	}
+
+	serdev_device_set_baudrate(hu->serdev, speed);
+
+	/* We forcefully have to send a command to the bluetooth module so that
+	 * the driver detects it after a baudrate change. This is foreseen by
+	 * hci_serdev by setting HCI_UART_VND_DETECT which then causes a dummy
+	 * local version read.
+	 */
+	set_bit(HCI_UART_VND_DETECT, &hu->hdev_flags);
+
 	return 0;
 }
 
-static const struct hci_uart_proto mrvl_proto = {
+static const struct hci_uart_proto mrvl_proto_8897 = {
 	.id		= HCI_UART_MRVL,
 	.name		= "Marvell",
 	.init_speed	= 115200,
+	.oper_speed	= 3000000,
 	.open		= mrvl_open,
 	.close		= mrvl_close,
 	.flush		= mrvl_flush,
@@ -393,18 +445,37 @@ static const struct hci_uart_proto mrvl_proto = {
 	.dequeue	= mrvl_dequeue,
 };
 
+static const struct hci_uart_proto mrvl_proto_8997 = {
+	.id		= HCI_UART_MRVL,
+	.name		= "Marvell 8997",
+	.init_speed	= 115200,
+	.oper_speed	= 3000000,
+	.open		= mrvl_open,
+	.close		= mrvl_close,
+	.flush		= mrvl_flush,
+	.set_baudrate   = mrvl_set_baudrate,
+	.recv		= mrvl_recv,
+	.enqueue	= mrvl_enqueue,
+	.dequeue	= mrvl_dequeue,
+};
+
 static int mrvl_serdev_probe(struct serdev_device *serdev)
 {
 	struct mrvl_serdev *mrvldev;
+	const struct hci_uart_proto *mrvl_proto = device_get_match_data(&serdev->dev);
 
 	mrvldev = devm_kzalloc(&serdev->dev, sizeof(*mrvldev), GFP_KERNEL);
 	if (!mrvldev)
 		return -ENOMEM;
 
+	mrvldev->hu.oper_speed = mrvl_proto->oper_speed;
+	if (mrvl_proto->set_baudrate)
+		of_property_read_u32(serdev->dev.of_node, "max-speed", &mrvldev->hu.oper_speed);
+
 	mrvldev->hu.serdev = serdev;
 	serdev_device_set_drvdata(serdev, mrvldev);
 
-	return hci_uart_register_device(&mrvldev->hu, &mrvl_proto);
+	return hci_uart_register_device(&mrvldev->hu, mrvl_proto);
 }
 
 static void mrvl_serdev_remove(struct serdev_device *serdev)
@@ -415,7 +486,8 @@ static void mrvl_serdev_remove(struct serdev_device *serdev)
 }
 
 static const struct of_device_id __maybe_unused mrvl_bluetooth_of_match[] = {
-	{ .compatible = "mrvl,88w8897" },
+	{ .compatible = "mrvl,88w8897", .data = &mrvl_proto_8897},
+	{ .compatible = "mrvl,88w8997", .data = &mrvl_proto_8997},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, mrvl_bluetooth_of_match);
@@ -433,12 +505,12 @@ int __init mrvl_init(void)
 {
 	serdev_device_driver_register(&mrvl_serdev_driver);
 
-	return hci_uart_register_proto(&mrvl_proto);
+	return hci_uart_register_proto(&mrvl_proto_8897);
 }
 
 int __exit mrvl_deinit(void)
 {
 	serdev_device_driver_unregister(&mrvl_serdev_driver);
 
-	return hci_uart_unregister_proto(&mrvl_proto);
+	return hci_uart_unregister_proto(&mrvl_proto_8897);
 }