Commit a4ccc9e3 authored by Rajat Jain's avatar Rajat Jain Committed by Marcel Holtmann

Bluetooth: btusb: Configure Marvell to use one of the pins for oob wakeup

The Marvell devices may have many gpio pins, and hence for wakeup
on these out-of-band pins, the chip needs to be told which pin is
to be used for wakeup, using an hci command.

Thus, we read the pin number etc from the device tree node and send
a command to the chip.
Signed-off-by: default avatarRajat Jain <rajatja@google.com>
Reviewed-by: default avatarBrian Norris <briannorris@chromium.org>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent fd913ef7
...@@ -10,6 +10,9 @@ Required properties: ...@@ -10,6 +10,9 @@ Required properties:
"usb1286,204e" (Marvell 8997) "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: Optional properties:
- interrupt-parent: phandle of the parent interrupt controller - interrupt-parent: phandle of the parent interrupt controller
......
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: Required properties:
- compatible : should be one of the following: - compatible : should be one of the following:
* "marvell,sd8897-bt" * "marvell,sd8897-bt" (for SDIO)
* "marvell,sd8997-bt" * "marvell,sd8997-bt" (for SDIO)
* "usb1286,204e" (for USB)
Optional properties: Optional properties:
- marvell,cal-data: Calibration data downloaded to the device during - marvell,cal-data: Calibration data downloaded to the device during
initialization. This is an array of 28 values(u8). 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. - marvell,wakeup-pin: It represents wakeup pin number of the bluetooth chip.
firmware will use the pin to wakeup host system (u16). firmware will use the pin to wakeup host system (u16).
...@@ -18,10 +23,15 @@ Optional properties: ...@@ -18,10 +23,15 @@ Optional properties:
platform. The value will be configured to firmware. This platform. The value will be configured to firmware. This
is needed to work chip's sleep feature as expected (u16). is needed to work chip's sleep feature as expected (u16).
- interrupt-parent: phandle of the parent interrupt controller - interrupt-parent: phandle of the parent interrupt controller
- interrupts : interrupt pin number to the cpu. Driver will request an irq based - interrupt-names: Used only for USB based devices (See below)
on this interrupt number. During system suspend, the irq will be - interrupts : specifies the interrupt pin number to the cpu. For SDIO, the
enabled so that the bluetooth chip can wakeup host platform under driver will use the first interrupt specified in the interrupt
certain condition. During system resume, the irq will be disabled 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. to make sure unnecessary interrupt is not received.
Example: Example:
...@@ -29,7 +39,9 @@ Example: ...@@ -29,7 +39,9 @@ Example:
IRQ pin 119 is used as system wakeup source interrupt. IRQ pin 119 is used as system wakeup source interrupt.
wakeup pin 13 and gap 100ms are configured so that firmware can wakeup host wakeup pin 13 and gap 100ms are configured so that firmware can wakeup host
using this device side pin and wakeup latency. 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 { &mmc3 {
status = "okay"; status = "okay";
...@@ -54,3 +66,21 @@ calibration data is also available in below example. ...@@ -54,3 +66,21 @@ calibration data is also available in below example.
marvell,wakeup-gap-ms = /bits/ 16 <0x64>; 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>;
};
};
...@@ -2347,6 +2347,50 @@ static int btusb_shutdown_intel(struct hci_dev *hdev) ...@@ -2347,6 +2347,50 @@ static int btusb_shutdown_intel(struct hci_dev *hdev)
return 0; 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, static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
const bdaddr_t *bdaddr) const bdaddr_t *bdaddr)
{ {
...@@ -2922,6 +2966,13 @@ static int btusb_probe(struct usb_interface *intf, ...@@ -2922,6 +2966,13 @@ static int btusb_probe(struct usb_interface *intf,
err = btusb_config_oob_wake(hdev); err = btusb_config_oob_wake(hdev);
if (err) if (err)
goto out_free_dev; 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 #endif
if (id->driver_info & BTUSB_CW6622) if (id->driver_info & BTUSB_CW6622)
set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks); set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
......
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