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HID: logitech-hidpp: Support translations from short to long reports

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This patch allows short reports to be translated into long reports.

hidpp_validate_device now returns a u8 instead of a bool which represents
the supported reports. The corresponding bits (i.e.
HIDPP_REPORT_*_SUPPORTED) are set if an HID++ report is supported.

If a short report is being sent and the device does not support it, it is
instead sent as a long report.

This patch also introduces support for the MX Master (b01e and b012).

Signed-off-by: Mazin Rezk <mnrzk@protonmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
This commit is contained in:
Mazin Rezk 2019-10-27 17:44:06 +00:00 committed by Benjamin Tissoires
parent d004701d1c
commit c2a932717a
1 changed files with 24 additions and 6 deletions
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30
drivers/hid/hid-logitech-hidpp.c
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@ -49,6 +49,10 @@ MODULE_PARM_DESC(disable_tap_to_click,
#define HIDPP_REPORT_LONG_LENGTH 20
#define HIDPP_REPORT_VERY_LONG_MAX_LENGTH 64
#define HIDPP_REPORT_SHORT_SUPPORTED BIT(0)
#define HIDPP_REPORT_LONG_SUPPORTED BIT(1)
#define HIDPP_REPORT_VERY_LONG_SUPPORTED BIT(2)
#define HIDPP_SUB_ID_CONSUMER_VENDOR_KEYS 0x03
#define HIDPP_SUB_ID_ROLLER 0x05
#define HIDPP_SUB_ID_MOUSE_EXTRA_BTNS 0x06
@ -183,6 +187,7 @@ struct hidpp_device {
unsigned long quirks;
unsigned long capabilities;
u8 supported_reports;
struct hidpp_battery battery;
struct hidpp_scroll_counter vertical_wheel_counter;
@ -340,6 +345,11 @@ static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
struct hidpp_report *message;
int ret, max_count;
/* Send as long report if short reports are not supported. */
if (report_id == REPORT_ID_HIDPP_SHORT &&
!(hidpp_dev->supported_reports & HIDPP_REPORT_SHORT_SUPPORTED))
report_id = REPORT_ID_HIDPP_LONG;
switch (report_id) {
case REPORT_ID_HIDPP_SHORT:
max_count = HIDPP_REPORT_SHORT_LENGTH - 4;
@ -3481,10 +3491,11 @@ static int hidpp_get_report_length(struct hid_device *hdev, int id)
return report->field[0]->report_count + 1;
}
static bool hidpp_validate_device(struct hid_device *hdev)
static u8 hidpp_validate_device(struct hid_device *hdev)
{
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
int id, report_length, supported_reports = 0;
int id, report_length;
u8 supported_reports = 0;
id = REPORT_ID_HIDPP_SHORT;
report_length = hidpp_get_report_length(hdev, id);
@ -3492,7 +3503,7 @@ static bool hidpp_validate_device(struct hid_device *hdev)
if (report_length < HIDPP_REPORT_SHORT_LENGTH)
goto bad_device;
supported_reports++;
supported_reports |= HIDPP_REPORT_SHORT_SUPPORTED;
}
id = REPORT_ID_HIDPP_LONG;
@ -3501,7 +3512,7 @@ static bool hidpp_validate_device(struct hid_device *hdev)
if (report_length < HIDPP_REPORT_LONG_LENGTH)
goto bad_device;
supported_reports++;
supported_reports |= HIDPP_REPORT_LONG_SUPPORTED;
}
id = REPORT_ID_HIDPP_VERY_LONG;
@ -3511,7 +3522,7 @@ static bool hidpp_validate_device(struct hid_device *hdev)
report_length > HIDPP_REPORT_VERY_LONG_MAX_LENGTH)
goto bad_device;
supported_reports++;
supported_reports |= HIDPP_REPORT_VERY_LONG_SUPPORTED;
hidpp->very_long_report_length = report_length;
}
@ -3560,7 +3571,9 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
/*
* Make sure the device is HID++ capable, otherwise treat as generic HID
*/
if (!hidpp_validate_device(hdev)) {
hidpp->supported_reports = hidpp_validate_device(hdev);
if (!hidpp->supported_reports) {
hid_set_drvdata(hdev, NULL);
devm_kfree(&hdev->dev, hidpp);
return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
@ -3808,6 +3821,11 @@ static const struct hid_device_id hidpp_devices[] = {
{ /* MX5500 keyboard over Bluetooth */
HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb30b),
.driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
{ /* MX Master mouse over Bluetooth */
HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb012),
.driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb01e),
.driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{}
};