On Wed, 17 Jun 2009, Rafi Rubin wrote:

> When both touch and pen are active send a tool announcement before
> sending any status changes so that event users may differentiate
> which tool is changing.
> 
> Restored three usage codes used by the pen.
> 
> Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu>
> ---
>  drivers/hid/hid-ntrig.c |   31 ++++++++++++++++++++++++++++---
>  1 files changed, 28 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
> index 75ed9d2..7765970 100644
> --- a/drivers/hid/hid-ntrig.c
> +++ b/drivers/hid/hid-ntrig.c
> @@ -27,6 +27,9 @@
>  struct ntrig_data {
>  	__s32 x, y, id, w, h;
>  	char reading_a_point, found_contact_id;
> +	char pen_active;
> +	char finger_active;
> +	char inverted;
>  };
>  
>  /*
> @@ -63,10 +66,7 @@ static int ntrig_input_mapping(struct hid_device *hdev, struct hid_input *hi,
>  	case HID_UP_DIGITIZER:
>  		switch (usage->hid) {
>  		/* we do not want to map these for now */
> -		case HID_DG_INVERT: /* value is always 0 */
> -		case HID_DG_ERASER: /* value is always 0 */
>  		case HID_DG_CONTACTID: /* value is useless */
> -		case HID_DG_BARRELSWITCH:  /* doubtful */
>  		case HID_DG_INPUTMODE:
>  		case HID_DG_DEVICEINDEX:
>  		case HID_DG_CONTACTCOUNT:
> @@ -125,6 +125,18 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
>  
>          if (hid->claimed & HID_CLAIMED_INPUT) {
>  		switch (usage->hid) {
> +
> +		case HID_DG_INRANGE:
> +			if(field->application & 0x3)
> +				nd->pen_active = value!=0;
> +			else
> +				nd->finger_active = value!=0;

Maybe putting brackets around the comparsion and putting spaces around 
'!=' would make the code more readable and easy to understand on a first 
sight?

> +			return 0;
> +
> +		case HID_DG_INVERT:
> +			nd->inverted = value;
> +			return 0;
> +
>  		case HID_GD_X:
>  			nd->x = value;
>  			nd->reading_a_point = 1;
> @@ -148,6 +160,10 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
>  			 * to emit a normal (X, Y) position
>  			 */
>  			if (! nd->found_contact_id) {

While at it, could you please remove the space after '!' to be compatible 
with the kernel coding style?

> +				if(nd->pen_active && nd->finger_active) {

And insert a space after 'if' here.

> +					input_report_key(input, BTN_TOOL_DOUBLETAP, 0);
> +					input_report_key(input, BTN_TOOL_DOUBLETAP, 1);
> +				}
>  				input_event(input, EV_ABS, ABS_X, nd->x);
>  				input_event(input, EV_ABS, ABS_Y, nd->y);
>  			}
> @@ -159,6 +175,14 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
>  			 * to emit a normal (X, Y) position
>  			 */
>  			if (! nd->found_contact_id) {
> +				if(nd->pen_active && nd->finger_active) {

And the same here.



Stéphane, did you have chance to verify with your device, that everything 
works as expected with this version of Rafi's patch?

Thanks,

-- 
Jiri Kosina
SUSE Labs