[v7,1/3] HID: logitech-hidpp: Support translations from short to long reports
diff mbox series

Message ID rzUqln0ASGmn_QTpqCkke6UzMFQDj2H7fIngMOxQwtiX52PkWc_BbxkGy4XcIm7kaVcQHwAYhO7ITZoMotLSHw_2WZre9_QJBDhXoMPTLsw=@protonmail.com
State Superseded
Delegated to: Benjamin Tissoires
Headers show
Series
  • Logitech HID++ Bluetooth LE support
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Commit Message

Mazin Rezk Oct. 20, 2019, 4:41 a.m. UTC
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 <mnrzk@protonmail.com>
---
 drivers/hid/hid-logitech-hidpp.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

--
2.23.0

Comments

Benjamin Tissoires Oct. 22, 2019, 10:15 a.m. UTC | #1
Hi Mazin,

On Sun, Oct 20, 2019 at 6:41 AM Mazin Rezk <mnrzk@protonmail.com> wrote:
>
> 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 <mnrzk@protonmail.com>
> ---

Yep, I like this patch much better.

I also tested the 0xb012 MX Master, and it now works like a charm :)

nitpick: can you squash the next patch into this one? Because to be
useful, this patch really need one or 2 supported devices.

Cheers,
Benjamin



>  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
>
Mazin Rezk Oct. 22, 2019, 5:16 p.m. UTC | #2
On Tuesday, October 22, 2019 6:15 AM, Benjamin Tissoires <benjamin.tissoires@redhat.com> wrote:

> Hi Mazin,
>
> On Sun, Oct 20, 2019 at 6:41 AM Mazin Rezk mnrzk@protonmail.com wrote:
>
> > 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 mnrzk@protonmail.com
> >
> > -----------------------------------------------
>
> Yep, I like this patch much better.
>
> I also tested the 0xb012 MX Master, and it now works like a charm :)
>
> nitpick: can you squash the next patch into this one? Because to be
> useful, this patch really need one or 2 supported devices.

I'll do that in v8 but I'm just going to wait until this patch is tested
more so I can see what other changes I need to make before the patch is
finalised.

Thanks,
Mazin

>
> Cheers,
> Benjamin
>
> > 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

Patch
diff mbox series

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);