Bluetooth: btusb: Configure Marvell to use one of the pins for oob wakeup (a4ccc9e3) · Commits · e / devices / android_kernel_oneplus_sm7250

Documentation/devicetree/bindings/net/btusb.txt

+3 −0

Original line number	Diff line number	Diff line
		@@ -10,6 +10,9 @@ Required properties:

		"usb1286,204e" (Marvell 8997)

		Also, vendors that use btusb may have device additional properties, e.g:
		Documentation/devicetree/bindings/net/marvell-bt-8xxx.txt

		Optional properties:

		- interrupt-parent: phandle of the parent interrupt controller

Documentation/devicetree/bindings/net/marvell-bt-sd8xxx.txt→Documentation/devicetree/bindings/net/marvell-bt-8xxx.txt

+38 −8

Original line number	Diff line number	Diff line
		Marvell 8897/8997 (sd8897/sd8997) bluetooth SDIO devices
		Marvell 8897/8997 (sd8897/sd8997) bluetooth devices (SDIO or USB based)
		------
		The 8997 devices supports multiple interfaces. When used on SDIO interfaces,
		the btmrvl driver is used and when used on USB interface, the btusb driver is
		used.

		Required properties:

		- compatible : should be one of the following:
		* "marvell,sd8897-bt"
		* "marvell,sd8997-bt"
		* "marvell,sd8897-bt" (for SDIO)
		* "marvell,sd8997-bt" (for SDIO)
		* "usb1286,204e" (for USB)

		Optional properties:

		- marvell,cal-data: Calibration data downloaded to the device during
		initialization. This is an array of 28 values(u8).
		This is only applicable to SDIO devices.

		- marvell,wakeup-pin: It represents wakeup pin number of the bluetooth chip.
		firmware will use the pin to wakeup host system (u16).
		@@ -18,10 +23,15 @@ Optional properties:
		platform. The value will be configured to firmware. This
		is needed to work chip's sleep feature as expected (u16).
		- interrupt-parent: phandle of the parent interrupt controller
		- interrupts : interrupt pin number to the cpu. Driver will request an irq based
		on this interrupt number. During system suspend, the irq will be
		enabled so that the bluetooth chip can wakeup host platform under
		certain condition. During system resume, the irq will be disabled
		- interrupt-names: Used only for USB based devices (See below)
		- interrupts : specifies the interrupt pin number to the cpu. For SDIO, the
		driver will use the first interrupt specified in the interrupt
		array. For USB based devices, the driver will use the interrupt
		named "wakeup" from the interrupt-names and interrupt arrays.
		The driver will request an irq based on this interrupt number.
		During system suspend, the irq will be enabled so that the
		bluetooth chip can wakeup host platform under certain
		conditions. During system resume, the irq will be disabled
		to make sure unnecessary interrupt is not received.

		Example:
		@@ -29,7 +39,9 @@ Example:
		IRQ pin 119 is used as system wakeup source interrupt.
		wakeup pin 13 and gap 100ms are configured so that firmware can wakeup host
		using this device side pin and wakeup latency.
		calibration data is also available in below example.

		Example for SDIO device follows (calibration data is also available in
		below example).

		&mmc3 {
		status = "okay";
		@@ -54,3 +66,21 @@ calibration data is also available in below example.
		marvell,wakeup-gap-ms = /bits/ 16 <0x64>;
		};
		};

		Example for USB device:

		&usb_host1_ohci {
		status = "okay";
		#address-cells = <1>;
		#size-cells = <0>;

		mvl_bt1: bt@1 {
		compatible = "usb1286,204e";
		reg = <1>;
		interrupt-parent = <&gpio0>;
		interrupt-names = "wakeup";
		interrupts = <119 IRQ_TYPE_LEVEL_LOW>;
		marvell,wakeup-pin = /bits/ 16 <0x0d>;
		marvell,wakeup-gap-ms = /bits/ 16 <0x64>;
		};
		};

drivers/bluetooth/btusb.c

+51 −0

Original line number	Diff line number	Diff line
		@@ -2347,6 +2347,50 @@ static int btusb_shutdown_intel(struct hci_dev *hdev)
		return 0;
		}

		#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)
		{
		struct sk_buff *skb;
		struct btusb_data *data = hci_get_drvdata(hdev);
		struct device *dev = &data->udev->dev;
		u16 pin, gap, opcode;
		int ret;
		u8 cmd[5];

		/* Move on if no wakeup pin specified */
		if (of_property_read_u16(dev->of_node, "marvell,wakeup-pin", &pin) \|\|
		of_property_read_u16(dev->of_node, "marvell,wakeup-gap-ms", &gap))
		return 0;

		/* Vendor specific command to configure a GPIO as wake-up pin */
		opcode = hci_opcode_pack(0x3F, 0x59);
		cmd[0] = opcode & 0xFF;
		cmd[1] = opcode >> 8;
		cmd[2] = 2; /* length of parameters that follow */
		cmd[3] = pin;
		cmd[4] = gap; /* time in ms, for which wakeup pin should be asserted */

		skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
		if (!skb) {
		bt_dev_err(hdev, "%s: No memory\n", __func__);
		return -ENOMEM;
		}

		memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
		hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;

		ret = btusb_send_frame(hdev, skb);
		if (ret) {
		bt_dev_err(hdev, "%s: configuration failed\n", __func__);
		kfree_skb(skb);
		return ret;
		}

		return 0;
		}
		#endif

		static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
		const bdaddr_t *bdaddr)
		{
		@@ -2922,6 +2966,13 @@ static int btusb_probe(struct usb_interface *intf,
		err = btusb_config_oob_wake(hdev);
		if (err)
		goto out_free_dev;

		/* Marvell devices may need a specific chip configuration */
		if (id->driver_info & BTUSB_MARVELL && data->oob_wake_irq) {
		err = marvell_config_oob_wake(hdev);
		if (err)
		goto out_free_dev;
		}
		#endif
		if (id->driver_info & BTUSB_CW6622)
		set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);