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.
Thanks,
Mazin
Signed-off-by: Mazin Rezk <mn...@protonmail.com>
---
drivers/hid/hid-logitech-hidpp.c | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index e9bba282f9c1..ee604b17514f 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -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;
@@ -3458,10 +3468,11 @@ 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);
@@ -3469,7 +3480,7 @@ 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;
@@ -3478,7 +3489,7 @@ 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;
@@ -3488,7 +3499,7 @@ 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;
}
@@ -3536,7 +3547,9 @@ 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);
--
2.23.0
