linux-kernel - Re: [PATCH v2 1/3] hid-multitouch: add support for trackpads

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 20 Jan 2012 17:09:48 +0100
From:	"Henrik Rydberg" <rydberg@...omail.se>
To:	Benjamin Tissoires <benjamin.tissoires@...c.fr>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Stephane Chatty <chatty@...c.fr>,
	Mohamed Ikbel Boulabiar <boulabiar@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] hid-multitouch: add support for trackpads

Hi Benjamin,

> @@ -389,9 +404,19 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
>  				td->last_field_index = field->index;
>  			return -1;
>  		}
> +		case HID_DG_TOUCH:
> +			/* Legacy devices use TIPSWITCH and not TOUCH.
> +			 * Let's just ignore this field. */
> +			return -1;
>  		/* let hid-input decide for the others */
>  		return 0;
>  
> +	case HID_UP_BUTTON:
> +		code = ((usage->hid - 1) & HID_USAGE) + BTN_MOUSE;

Why '+' here instead of '|' is  beyond me...

> +		hid_map_usage(hi, usage, bit, max, EV_KEY, code);
> +		input_set_capability(hi->input, EV_KEY, code);
> +		return 1;
> +
>  	case 0xff000000:
>  		/* we do not want to map these: no input-oriented meaning */
>  		return -1;
> @@ -453,6 +478,7 @@ static void mt_complete_slot(struct mt_device *td)
>  static void mt_emit_event(struct mt_device *td, struct input_dev *input)
>  {
>  	int i;
> +	int finger_count = 0;
>  
>  	for (i = 0; i < td->maxcontacts; ++i) {
>  		struct mt_slot *s = &(td->slots[i]);
> @@ -477,12 +503,14 @@ static void mt_emit_event(struct mt_device *td, struct input_dev *input)
>  			input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
>  			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
>  			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
> +			finger_count++;
>  		}
>  		s->seen_in_this_frame = false;
>  
>  	}
>  
>  	input_mt_report_pointer_emulation(input, true);
> +	input_mt_report_finger_count(input, finger_count);

This function is already called from input_mt_report_pointer_emulation().

>  	input_sync(input);
>  	td->num_received = 0;
>  }

Thanks,
Henrik
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/