Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next

Johan Hedberg says:

====================
pull request: bluetooth-next 2019-03-02

Here's one more bluetooth-next pull request for the 5.1 kernel:

- Added support for MediaTek MT7663U and MT7668U UART devices
- Cleanups & fixes to the hci_qca driver
- Fixed wakeup pin behavior for QCA6174A controller

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <[e-mail]>

Documentation/devicetree/bindings/net/btusb.txt

···
 		 (more may be added later) are:
 
 		  "usb1286,204e" (Marvell 8997)
+		  "usbcf3,e300" (Qualcomm QCA6174A)
+		  "usb4ca,301a" (Qualcomm QCA6174A (Lite-On))
+
 
 Also, vendors that use btusb may have device additional properties, e.g:
 Documentation/devicetree/bindings/net/marvell-bt-8xxx.txt

Documentation/devicetree/bindings/net/mediatek-bluetooth.txt

···
 			clock-names = "ref";
 		};
 	};
+
+MediaTek UART based Bluetooth Devices
+==================================
+
+This device is a serial attached device to UART device and thus it must be a
+child node of the serial node with UART.
+
+Please refer to the following documents for generic properties:
+
+	Documentation/devicetree/bindings/serial/slave-device.txt
+
+Required properties:
+
+- compatible:	Must be
+		  "mediatek,mt7663u-bluetooth": for MT7663U device
+		  "mediatek,mt7668u-bluetooth": for MT7668U device
+- vcc-supply:	Main voltage regulator
+- pinctrl-names: Should be "default", "runtime"
+- pinctrl-0: Should contain UART RXD low when the device is powered up to
+	     enter proper bootstrap mode.
+- pinctrl-1: Should contain UART mode pin ctrl
+
+Optional properties:
+
+- reset-gpios:	GPIO used to reset the device whose initial state keeps low,
+		if the GPIO is missing, then board-level design should be
+		guaranteed.
+- current-speed:  Current baud rate of the device whose defaults to 921600
+
+Example:
+
+	uart1_pins_boot: uart1-default {
+		pins-dat {
+			pinmux = <MT7623_PIN_81_URXD1_FUNC_GPIO81>;
+			output-low;
+		};
+	};
+
+	uart1_pins_runtime: uart1-runtime {
+		pins-dat {
+			pinmux = <MT7623_PIN_81_URXD1_FUNC_URXD1>,
+				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
+		};
+	};
+
+	uart1: serial@11003000 {
+		compatible = "mediatek,mt7623-uart",
+			     "mediatek,mt6577-uart";
+		reg = <0 0x11003000 0 0x400>;
+		interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&pericfg CLK_PERI_UART1_SEL>,
+			 <&pericfg CLK_PERI_UART1>;
+		clock-names = "baud", "bus";
+
+		bluetooth {
+			compatible = "mediatek,mt7663u-bluetooth";
+			vcc-supply = <&reg_5v>;
+			reset-gpios = <&pio 24 GPIO_ACTIVE_LOW>;
+			pinctrl-names = "default", "runtime";
+			pinctrl-0 = <&uart1_pins_boot>;
+			pinctrl-1 = <&uart1_pins_runtime>;
+			current-speed = <921600>;
+		};
+	};

arch/arm64/boot/dts/rockchip/rk3399-gru-chromebook.dtsi

···
 		pinctrl-0 = <&bl_en>;
 		pwm-delay-us = <10000>;
 	};
+
+	gpio_keys: gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-names = "default";
+		pinctrl-0 = <&bt_host_wake_l>;
+
+		wake_on_bt: wake-on-bt {
+			label = "Wake-on-Bluetooth";
+			gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WAKEUP>;
+			wakeup-source;
+		};
+	};
 };
 
 &ppvar_bigcpu {

arch/arm64/boot/dts/rockchip/rk3399-gru-scarlet.dtsi

···
 		pinctrl-0 = <&dmic_en>;
 		wakeup-delay-ms = <250>;
 	};
+
+	gpio_keys: gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pen_eject_odl>;
+
+		pen-insert {
+			label = "Pen Insert";
+			/* Insert = low, eject = high */
+			gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
+			linux,code = <SW_PEN_INSERTED>;
+			linux,input-type = <EV_SW>;
+			wakeup-source;
+		};
+	};
 };
 
 /* pp900_s0 aliases */
···
 		<400000000>;
 };
 
-&gpio_keys {
-	pinctrl-names = "default";
-	pinctrl-0 = <&bt_host_wake_l>, <&pen_eject_odl>;
-
-	pen-insert {
-		label = "Pen Insert";
-		/* Insert = low, eject = high */
-		gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
-		linux,code = <SW_PEN_INSERTED>;
-		linux,input-type = <EV_SW>;
-		wakeup-source;
-	};
-};
-
 &i2c_tunnel {
 	google,remote-bus = <0>;
 };
···
 	status = "okay";
 };
 
-&wake_on_bt {
-	gpios = <&gpio1 2 GPIO_ACTIVE_LOW>;
+&usb_host0_ohci {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	qca_bt: bluetooth@1 {
+		compatible = "usbcf3,e300", "usb4ca,301a";
+		reg = <1>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&bt_host_wake_l>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "wakeup";
+	};
 };
 
 /* PINCTRL OVERRIDES */
···
 };
 
 &bt_host_wake_l {
-	rockchip,pins = <1 2 RK_FUNC_GPIO &pcfg_pull_up>;
+	rockchip,pins = <1 2 RK_FUNC_GPIO &pcfg_pull_none>;
 };
 
 &ec_ap_int_l {

arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi

···
 		#clock-cells = <0>;
 	};
 
-	gpio_keys: gpio-keys {
-		compatible = "gpio-keys";
-		pinctrl-names = "default";
-		pinctrl-0 = <&bt_host_wake_l>;
-
-		wake_on_bt: wake-on-bt {
-			label = "Wake-on-Bluetooth";
-			gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_WAKEUP>;
-			wakeup-source;
-		};
-	};
-
 	max98357a: max98357a {
 		compatible = "maxim,max98357a";
 		pinctrl-names = "default";

drivers/bluetooth/btmtkuart.c

···
 #include <linux/atomic.h>
 #include <linux/clk.h>
 #include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
 #include <linux/iopoll.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
 #include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
 #include <linux/serdev.h>
 #include <linux/skbuff.h>
 
···
 
 #include "h4_recv.h"
 
-#define VERSION "0.1"
+#define VERSION "0.2"
 
 #define FIRMWARE_MT7622		"mediatek/mt7622pr2h.bin"
+#define FIRMWARE_MT7663		"mediatek/mt7663pr2h.bin"
+#define FIRMWARE_MT7668		"mediatek/mt7668pr2h.bin"
 
 #define MTK_STP_TLR_SIZE	2
 
 #define BTMTKUART_TX_STATE_ACTIVE	1
 #define BTMTKUART_TX_STATE_WAKEUP	2
 #define BTMTKUART_TX_WAIT_VND_EVT	3
+#define BTMTKUART_REQUIRED_WAKEUP	4
+
+#define BTMTKUART_FLAG_STANDALONE_HW	 BIT(0)
 
 enum {
 	MTK_WMT_PATCH_DWNLD = 0x1,
+	MTK_WMT_TEST = 0x2,
+	MTK_WMT_WAKEUP = 0x3,
+	MTK_WMT_HIF = 0x4,
 	MTK_WMT_FUNC_CTRL = 0x6,
 	MTK_WMT_RST = 0x7,
 	MTK_WMT_SEMAPHORE = 0x17,
···
 	__be16	dlen;
 	u8	cs;
 } __packed;
+
+struct btmtkuart_data {
+	unsigned int flags;
+	const char *fwname;
+};
 
 struct mtk_wmt_hdr {
 	u8	dir;
···
 	struct serdev_device *serdev;
 	struct clk *clk;
 
+	struct regulator *vcc;
+	struct gpio_desc *reset;
+	struct pinctrl *pinctrl;
+	struct pinctrl_state *pins_runtime;
+	struct pinctrl_state *pins_boot;
+	speed_t	desired_speed;
+	speed_t	curr_speed;
+
 	struct work_struct tx_work;
 	unsigned long tx_state;
 	struct sk_buff_head txq;
···
 	u8	stp_pad[6];
 	u8	stp_cursor;
 	u16	stp_dlen;
+
+	const struct btmtkuart_data *data;
 };
+
+#define btmtkuart_is_standalone(bdev)	\
+	((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
+#define btmtkuart_is_builtin_soc(bdev)	\
+	!((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
 
 static int mtk_hci_wmt_sync(struct hci_dev *hdev,
 			    struct btmtk_hci_wmt_params *wmt_params)
···
 	return err;
 }
 
-static int mtk_setup_fw(struct hci_dev *hdev)
+static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
 {
 	struct btmtk_hci_wmt_params wmt_params;
 	const struct firmware *fw;
···
 	int err, dlen;
 	u8 flag;
 
-	err = request_firmware(&fw, FIRMWARE_MT7622, &hdev->dev);
+	err = request_firmware(&fw, fwname, &hdev->dev);
 	if (err < 0) {
 		bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
 		return err;
···
 		goto err_open;
 	}
 
+	if (btmtkuart_is_standalone(bdev)) {
+		if (bdev->curr_speed != bdev->desired_speed)
+			err = serdev_device_set_baudrate(bdev->serdev,
+							 115200);
+		else
+			err = serdev_device_set_baudrate(bdev->serdev,
+							 bdev->desired_speed);
+
+		if (err < 0) {
+			bt_dev_err(hdev, "Unable to set baudrate UART device %s",
+				   dev_name(&bdev->serdev->dev));
+			goto  err_serdev_close;
+		}
+
+		serdev_device_set_flow_control(bdev->serdev, false);
+	}
+
 	bdev->stp_cursor = 2;
 	bdev->stp_dlen = 0;
 
···
 	pm_runtime_put_sync(dev);
 err_disable_rpm:
 	pm_runtime_disable(dev);
+err_serdev_close:
+	serdev_device_close(bdev->serdev);
 err_open:
 	return err;
 }
···
 	return status;
 }
 
+static int btmtkuart_change_baudrate(struct hci_dev *hdev)
+{
+	struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
+	struct btmtk_hci_wmt_params wmt_params;
+	u32 baudrate;
+	u8 param;
+	int err;
+
+	/* Indicate the device to enter the probe state the host is
+	 * ready to change a new baudrate.
+	 */
+	baudrate = cpu_to_le32(bdev->desired_speed);
+	wmt_params.op = MTK_WMT_HIF;
+	wmt_params.flag = 1;
+	wmt_params.dlen = 4;
+	wmt_params.data = &baudrate;
+	wmt_params.status = NULL;
+
+	err = mtk_hci_wmt_sync(hdev, &wmt_params);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to device baudrate (%d)", err);
+		return err;
+	}
+
+	err = serdev_device_set_baudrate(bdev->serdev,
+					 bdev->desired_speed);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to set up host baudrate (%d)",
+			   err);
+		return err;
+	}
+
+	serdev_device_set_flow_control(bdev->serdev, false);
+
+	/* Send a dummy byte 0xff to activate the new baudrate */
+	param = 0xff;
+	err = serdev_device_write(bdev->serdev, &param, sizeof(param),
+				  MAX_SCHEDULE_TIMEOUT);
+	if (err < 0 || err < sizeof(param))
+		return err;
+
+	serdev_device_wait_until_sent(bdev->serdev, 0);
+
+	/* Wait some time for the device changing baudrate done */
+	usleep_range(20000, 22000);
+
+	/* Test the new baudrate */
+	wmt_params.op = MTK_WMT_TEST;
+	wmt_params.flag = 7;
+	wmt_params.dlen = 0;
+	wmt_params.data = NULL;
+	wmt_params.status = NULL;
+
+	err = mtk_hci_wmt_sync(hdev, &wmt_params);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to test new baudrate (%d)",
+			   err);
+		return err;
+	}
+
+	bdev->curr_speed = bdev->desired_speed;
+
+	return 0;
+}
+
 static int btmtkuart_setup(struct hci_dev *hdev)
 {
+	struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
 	struct btmtk_hci_wmt_params wmt_params;
 	ktime_t calltime, delta, rettime;
 	struct btmtk_tci_sleep tci_sleep;
···
 	u8 param = 0x1;
 
 	calltime = ktime_get();
+
+	/* Wakeup MCUSYS is required for certain devices before we start to
+	 * do any setups.
+	 */
+	if (test_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state)) {
+		wmt_params.op = MTK_WMT_WAKEUP;
+		wmt_params.flag = 3;
+		wmt_params.dlen = 0;
+		wmt_params.data = NULL;
+		wmt_params.status = NULL;
+
+		err = mtk_hci_wmt_sync(hdev, &wmt_params);
+		if (err < 0) {
+			bt_dev_err(hdev, "Failed to wakeup the chip (%d)", err);
+			return err;
+		}
+
+		clear_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state);
+	}
+
+	if (btmtkuart_is_standalone(bdev))
+		btmtkuart_change_baudrate(hdev);
 
 	/* Query whether the firmware is already download */
 	wmt_params.op = MTK_WMT_SEMAPHORE;
···
 	}
 
 	/* Setup a firmware which the device definitely requires */
-	err = mtk_setup_fw(hdev);
+	err = mtk_setup_firmware(hdev, bdev->data->fwname);
 	if (err < 0)
 		return err;
 
···
 	return 0;
 }
 
+static int btmtkuart_parse_dt(struct serdev_device *serdev)
+{
+	struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
+	struct device_node *node = serdev->dev.of_node;
+	u32 speed = 921600;
+	int err;
+
+	if (btmtkuart_is_standalone(bdev)) {
+		of_property_read_u32(node, "current-speed", &speed);
+
+		bdev->desired_speed = speed;
+
+		bdev->vcc = devm_regulator_get(&serdev->dev, "vcc");
+		if (IS_ERR(bdev->vcc)) {
+			err = PTR_ERR(bdev->vcc);
+			return err;
+		}
+
+		bdev->pinctrl = devm_pinctrl_get(&serdev->dev);
+		if (IS_ERR(bdev->pinctrl)) {
+			err = PTR_ERR(bdev->pinctrl);
+			return err;
+		}
+
+		bdev->pins_boot = pinctrl_lookup_state(bdev->pinctrl,
+						       "default");
+		if (IS_ERR(bdev->pins_boot)) {
+			err = PTR_ERR(bdev->pins_boot);
+			return err;
+		}
+
+		bdev->pins_runtime = pinctrl_lookup_state(bdev->pinctrl,
+							  "runtime");
+		if (IS_ERR(bdev->pins_runtime)) {
+			err = PTR_ERR(bdev->pins_runtime);
+			return err;
+		}
+
+		bdev->reset = devm_gpiod_get_optional(&serdev->dev, "reset",
+						      GPIOD_OUT_LOW);
+		if (IS_ERR(bdev->reset)) {
+			err = PTR_ERR(bdev->reset);
+			return err;
+		}
+	} else if (btmtkuart_is_builtin_soc(bdev)) {
+		bdev->clk = devm_clk_get(&serdev->dev, "ref");
+		if (IS_ERR(bdev->clk))
+			return PTR_ERR(bdev->clk);
+	}
+
+	return 0;
+}
+
 static int btmtkuart_probe(struct serdev_device *serdev)
 {
 	struct btmtkuart_dev *bdev;
 	struct hci_dev *hdev;
+	int err;
 
 	bdev = devm_kzalloc(&serdev->dev, sizeof(*bdev), GFP_KERNEL);
 	if (!bdev)
 		return -ENOMEM;
 
-	bdev->clk = devm_clk_get(&serdev->dev, "ref");
-	if (IS_ERR(bdev->clk))
-		return PTR_ERR(bdev->clk);
+	bdev->data = of_device_get_match_data(&serdev->dev);
+	if (!bdev->data)
+		return -ENODEV;
 
 	bdev->serdev = serdev;
 	serdev_device_set_drvdata(serdev, bdev);
 
 	serdev_device_set_client_ops(serdev, &btmtkuart_client_ops);
+
+	err = btmtkuart_parse_dt(serdev);
+	if (err < 0)
+		return err;
 
 	INIT_WORK(&bdev->tx_work, btmtkuart_tx_work);
 	skb_queue_head_init(&bdev->txq);
···
 	hdev->manufacturer = 70;
 	set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
 
-	if (hci_register_dev(hdev) < 0) {
+	if (btmtkuart_is_standalone(bdev)) {
+		/* Switch to the specific pin state for the booting requires */
+		pinctrl_select_state(bdev->pinctrl, bdev->pins_boot);
+
+		/* Power on */
+		err = regulator_enable(bdev->vcc);
+		if (err < 0)
+			return err;
+
+		/* Reset if the reset-gpios is available otherwise the board
+		 * -level design should be guaranteed.
+		 */
+		if (bdev->reset) {
+			gpiod_set_value_cansleep(bdev->reset, 1);
+			usleep_range(1000, 2000);
+			gpiod_set_value_cansleep(bdev->reset, 0);
+		}
+
+		/* Wait some time until device got ready and switch to the pin
+		 * mode the device requires for UART transfers.
+		 */
+		msleep(50);
+		pinctrl_select_state(bdev->pinctrl, bdev->pins_runtime);
+
+		/* A standalone device doesn't depends on power domain on SoC,
+		 * so mark it as no callbacks.
+		 */
+		pm_runtime_no_callbacks(&serdev->dev);
+
+		set_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state);
+	}
+
+	err = hci_register_dev(hdev);
+	if (err < 0) {
 		dev_err(&serdev->dev, "Can't register HCI device\n");
 		hci_free_dev(hdev);
-		return -ENODEV;
+		goto err_regulator_disable;
 	}
 
 	return 0;
+
+err_regulator_disable:
+	if (btmtkuart_is_standalone(bdev))  {
+		pinctrl_select_state(bdev->pinctrl, bdev->pins_boot);
+		regulator_disable(bdev->vcc);
+	}
+
+	return err;
 }
 
 static void btmtkuart_remove(struct serdev_device *serdev)
···
 	struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
 	struct hci_dev *hdev = bdev->hdev;
 
+	if (btmtkuart_is_standalone(bdev))  {
+		pinctrl_select_state(bdev->pinctrl, bdev->pins_boot);
+		regulator_disable(bdev->vcc);
+	}
+
 	hci_unregister_dev(hdev);
 	hci_free_dev(hdev);
 }
 
+static const struct btmtkuart_data mt7622_data = {
+	.fwname = FIRMWARE_MT7622,
+};
+
+static const struct btmtkuart_data mt7663_data = {
+	.flags = BTMTKUART_FLAG_STANDALONE_HW,
+	.fwname = FIRMWARE_MT7663,
+};
+
+static const struct btmtkuart_data mt7668_data = {
+	.flags = BTMTKUART_FLAG_STANDALONE_HW,
+	.fwname = FIRMWARE_MT7668,
+};
+
 #ifdef CONFIG_OF
 static const struct of_device_id mtk_of_match_table[] = {
-	{ .compatible = "mediatek,mt7622-bluetooth"},
+	{ .compatible = "mediatek,mt7622-bluetooth", .data = &mt7622_data},
+	{ .compatible = "mediatek,mt7663u-bluetooth", .data = &mt7663_data},
+	{ .compatible = "mediatek,mt7668u-bluetooth", .data = &mt7668_data},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mtk_of_match_table);
···
 MODULE_VERSION(VERSION);
 MODULE_LICENSE("GPL");
 MODULE_FIRMWARE(FIRMWARE_MT7622);
+MODULE_FIRMWARE(FIRMWARE_MT7663);
+MODULE_FIRMWARE(FIRMWARE_MT7668);

drivers/bluetooth/btqcomsmd.c

···
 struct btqcomsmd {
 	struct hci_dev *hdev;
 
-	bdaddr_t bdaddr;
 	struct rpmsg_endpoint *acl_channel;
 	struct rpmsg_endpoint *cmd_channel;
 };
···
 
 static int btqcomsmd_setup(struct hci_dev *hdev)
 {
-	struct btqcomsmd *btq = hci_get_drvdata(hdev);
 	struct sk_buff *skb;
-	int err;
 
 	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);
 	kfree_skb(skb);
 
-	/* Devices do not have persistent storage for BD address. If no
-	 * BD address has been retrieved during probe, mark the device
-	 * as having an invalid BD address.
+	/* Devices do not have persistent storage for BD address. Retrieve
+	 * it from the firmware node property.
 	 */
-	if (!bacmp(&btq->bdaddr, BDADDR_ANY)) {
-		set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
-		return 0;
-	}
-
-	/* When setting a configured BD address fails, mark the device
-	 * as having an invalid BD address.
-	 */
-	err = qca_set_bdaddr_rome(hdev, &btq->bdaddr);
-	if (err) {
-		set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
-		return 0;
-	}
+	set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
 
 	return 0;
 }
···
 						   btqcomsmd_cmd_callback, btq);
 	if (IS_ERR(btq->cmd_channel))
 		return PTR_ERR(btq->cmd_channel);
-
-	/* The local-bd-address property is usually injected by the
-	 * bootloader which has access to the allocated BD address.
-	 */
-	if (!of_property_read_u8_array(pdev->dev.of_node, "local-bd-address",
-				       (u8 *)&btq->bdaddr, sizeof(bdaddr_t))) {
-		dev_info(&pdev->dev, "BD address %pMR retrieved from device-tree",
-			 &btq->bdaddr);
-	}
 
 	hdev = hci_alloc_dev();
 	if (!hdev)

drivers/bluetooth/btusb.c

···
 
 static const struct of_device_id btusb_match_table[] = {
 	{ .compatible = "usb1286,204e" },
+	{ .compatible = "usbcf3,e300" }, /* QCA6174A */
+	{ .compatible = "usb4ca,301a" }, /* QCA6174A (Lite-On) */
 	{ }
 };
 MODULE_DEVICE_TABLE(of, btusb_match_table);

drivers/bluetooth/hci_ldisc.c

···
 		return -EPROTONOSUPPORT;
 
 	hu->proto = p;
-	set_bit(HCI_UART_PROTO_READY, &hu->flags);
 
 	err = hci_uart_register_dev(hu);
 	if (err) {
-		clear_bit(HCI_UART_PROTO_READY, &hu->flags);
 		return err;
 	}
 
+	set_bit(HCI_UART_PROTO_READY, &hu->flags);
 	return 0;
 }
 

drivers/bluetooth/hci_qca.c

···
 
 #define IBS_WAKE_RETRANS_TIMEOUT_MS	100
 #define IBS_TX_IDLE_TIMEOUT_MS		2000
-#define BAUDRATE_SETTLE_TIMEOUT_MS	300
-#define POWER_PULSE_TRANS_TIMEOUT_MS	100
+#define CMD_TRANS_TIMEOUT_MS		100
 
 /* susclk rate */
 #define SUSCLK_RATE_32KHZ	32768
···
 {
 	struct hci_uart *hu = hci_get_drvdata(hdev);
 	struct qca_data *qca = hu->priv;
+	struct qca_serdev *qcadev;
 	struct sk_buff *skb;
 	u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
 
···
 	skb_queue_tail(&qca->txq, skb);
 	hci_uart_tx_wakeup(hu);
 
-	/* wait 300ms to change new baudrate on controller side
-	 * controller will come back after they receive this HCI command
-	 * then host can communicate with new baudrate to controller
-	 */
-	set_current_state(TASK_UNINTERRUPTIBLE);
-	schedule_timeout(msecs_to_jiffies(BAUDRATE_SETTLE_TIMEOUT_MS));
-	set_current_state(TASK_RUNNING);
+	qcadev = serdev_device_get_drvdata(hu->serdev);
+
+	/* Wait for the baudrate change request to be sent */
+
+	while (!skb_queue_empty(&qca->txq))
+		usleep_range(100, 200);
+
+	serdev_device_wait_until_sent(hu->serdev,
+		      msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
+
+	/* Give the controller time to process the request */
+	if (qcadev->btsoc_type == QCA_WCN3990)
+		msleep(10);
+	else
+		msleep(300);
 
 	return 0;
 }
···
 		hci_uart_set_baudrate(hu, speed);
 }
 
-static int qca_send_power_pulse(struct hci_uart *hu, u8 cmd)
+static int qca_send_power_pulse(struct hci_uart *hu, bool on)
 {
 	int ret;
-	int timeout = msecs_to_jiffies(POWER_PULSE_TRANS_TIMEOUT_MS);
+	int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
+	u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE;
 
 	/* These power pulses are single byte command which are sent
 	 * at required baudrate to wcn3990. On wcn3990, we have an external
···
 	}
 
 	serdev_device_wait_until_sent(hu->serdev, timeout);
-
-	/* Wait for 100 uS for SoC to settle down */
-	usleep_range(100, 200);
 	hci_uart_set_flow_control(hu, false);
+
+	/* Give to controller time to boot/shutdown */
+	if (on)
+		msleep(100);
+	else
+		msleep(10);
 
 	return 0;
 }
···
 
 	/* Forcefully enable wcn3990 to enter in to boot mode. */
 	host_set_baudrate(hu, 2400);
-	ret = qca_send_power_pulse(hu, QCA_WCN3990_POWEROFF_PULSE);
+	ret = qca_send_power_pulse(hu, false);
 	if (ret)
 		return ret;
 
 	qca_set_speed(hu, QCA_INIT_SPEED);
-	ret = qca_send_power_pulse(hu, QCA_WCN3990_POWERON_PULSE);
+	ret = qca_send_power_pulse(hu, true);
 	if (ret)
 		return ret;
-
-	/* Wait for 100 ms for SoC to boot */
-	msleep(100);
 
 	/* Now the device is in ready state to communicate with host.
 	 * To sync host with device we need to reopen port.
···
 		 * setup for every hci up.
 		 */
 		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
+		set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
 		hu->hdev->shutdown = qca_power_off;
 		ret = qca_wcn3990_init(hu);
 		if (ret)
···
 	spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 
 	host_set_baudrate(hu, 2400);
-	qca_send_power_pulse(hu, QCA_WCN3990_POWEROFF_PULSE);
+	qca_send_power_pulse(hu, false);
 	qca_power_setup(hu, false);
 }
 

include/net/bluetooth/hci.h

···
 	 */
 	HCI_QUIRK_INVALID_BDADDR,
 
+	/* When this quirk is set, the public Bluetooth address
+	 * initially reported by HCI Read BD Address command
+	 * is considered invalid. The public BD Address can be
+	 * specified in the fwnode property 'local-bd-address'.
+	 * If this property does not exist or is invalid controller
+	 * configuration is required before this device can be used.
+	 *
+	 * This quirk can be set before hci_register_dev is called or
+	 * during the hdev->setup vendor callback.
+	 */
+	HCI_QUIRK_USE_BDADDR_PROPERTY,
+
 	/* When this quirk is set, the duplicate filtering during
 	 * scanning is based on Bluetooth devices addresses. To allow
 	 * RSSI based updates, restart scanning if needed.

net/bluetooth/hci_core.c

···
 #include <linux/rfkill.h>
 #include <linux/debugfs.h>
 #include <linux/crypto.h>
+#include <linux/property.h>
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
···
 	return err;
 }
 
+/**
+ * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
+ *				       (BD_ADDR) for a HCI device from
+ *				       a firmware node property.
+ * @hdev:	The HCI device
+ *
+ * Search the firmware node for 'local-bd-address'.
+ *
+ * All-zero BD addresses are rejected, because those could be properties
+ * that exist in the firmware tables, but were not updated by the firmware. For
+ * example, the DTS could define 'local-bd-address', with zero BD addresses.
+ */
+static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
+{
+	struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
+	bdaddr_t ba;
+	int ret;
+
+	ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
+					    (u8 *)&ba, sizeof(ba));
+	if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
+		return;
+
+	bacpy(&hdev->public_addr, &ba);
+}
+
 static int hci_dev_do_open(struct hci_dev *hdev)
 {
 	int ret = 0;
···
 		if (hdev->setup)
 			ret = hdev->setup(hdev);
 
+		if (ret)
+			goto setup_failed;
+
+		if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
+			if (!bacmp(&hdev->public_addr, BDADDR_ANY))
+				hci_dev_get_bd_addr_from_property(hdev);
+
+			if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
+			    hdev->set_bdaddr)
+				ret = hdev->set_bdaddr(hdev,
+						       &hdev->public_addr);
+			else
+				ret = -EADDRNOTAVAIL;
+		}
+
+setup_failed:
 		/* The transport driver can set these quirks before
 		 * creating the HCI device or in its setup callback.
 		 *

net/bluetooth/mgmt.c

···
 {
 	struct mgmt_rp_read_ext_index_list *rp;
 	struct hci_dev *d;
-	size_t rp_len;
 	u16 count;
 	int err;
 
···
 			count++;
 	}
 
-	rp_len = sizeof(*rp) + (sizeof(rp->entry[0]) * count);
-	rp = kmalloc(rp_len, GFP_ATOMIC);
+	rp = kmalloc(struct_size(rp, entry, count), GFP_ATOMIC);
 	if (!rp) {
 		read_unlock(&hci_dev_list_lock);
 		return -ENOMEM;
···
 	}
 
 	rp->num_controllers = cpu_to_le16(count);
-	rp_len = sizeof(*rp) + (sizeof(rp->entry[0]) * count);
 
 	read_unlock(&hci_dev_list_lock);
 
···
 	hci_sock_clear_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
 
 	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,
-				MGMT_OP_READ_EXT_INDEX_LIST, 0, rp, rp_len);
+				MGMT_OP_READ_EXT_INDEX_LIST, 0, rp,
+				struct_size(rp, entry, count));
 
 	kfree(rp);
 
···
 	    !hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))
 		return false;
 
-	if (test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) &&
+	if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
+	     test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&
 	    !bacmp(&hdev->public_addr, BDADDR_ANY))
 		return false;
 
···
 	    !hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))
 		options |= MGMT_OPTION_EXTERNAL_CONFIG;
 
-	if (test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) &&
+	if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
+	     test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&
 	    !bacmp(&hdev->public_addr, BDADDR_ANY))
 		options |= MGMT_OPTION_PUBLIC_ADDRESS;