diff options
| author | Éric Piel <E.A.B.Piel@tudelft.nl> | 2011-05-16 22:45:54 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-05-16 22:48:39 -0700 |
| commit | 89eec4d71e0a4e47a2f12a08992ada7500ea78a0 (patch) | |
| tree | f20c42679ecca9939454ca95427918282e9ada6e /drivers/input/mouse | |
| parent | f941c705f68fa62f694678bf2efde64dfb9962bb (diff) | |
Input: elantech - report multitouch with proper ABS_MT messages
Multitouch info was reported only via a old protocol used by the
proprietary X driver from elantech. Let's report the multitouch info
also following the official MT protocol. It's semi-mt because the device
only reports the lowest/highest coordinates.
This was done following the multi-touch-protocol.txt documentation, and
inspired by the bcm5974 and elantech implementations. Testing was light
as there is not many applications using this protocol yet, but the X
synaptics driver didn't complain and the X multitouch driver behaved
correctly.
Signed-off-by: Éric Piel <eric.piel@tremplin-utc.net>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/mouse')
| -rw-r--r-- | drivers/input/mouse/elantech.c | 39 |
1 files changed, 34 insertions, 5 deletions
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c index 5cde11f4ef5..32648b34b11 100644 --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -16,6 +16,7 @@ #include <linux/slab.h> #include <linux/module.h> #include <linux/input.h> +#include <linux/input/mt.h> #include <linux/serio.h> #include <linux/libps2.h> #include "psmouse.h" @@ -242,6 +243,27 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse) input_sync(dev); } +static void elantech_set_slot(struct input_dev *dev, int slot, bool active, + unsigned int x, unsigned int y) +{ + input_mt_slot(dev, slot); + input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); + if (active) { + input_report_abs(dev, ABS_MT_POSITION_X, x); + input_report_abs(dev, ABS_MT_POSITION_Y, y); + } +} + +/* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */ +static void elantech_report_semi_mt_data(struct input_dev *dev, + unsigned int num_fingers, + unsigned int x1, unsigned int y1, + unsigned int x2, unsigned int y2) +{ + elantech_set_slot(dev, 0, num_fingers != 0, x1, y1); + elantech_set_slot(dev, 1, num_fingers == 2, x2, y2); +} + /* * Interpret complete data packets and report absolute mode input events for * hardware version 2. (6 byte packets) @@ -251,7 +273,7 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse) struct elantech_data *etd = psmouse->private; struct input_dev *dev = psmouse->dev; unsigned char *packet = psmouse->packet; - int fingers, x1, y1, x2, y2, width = 0, pres = 0; + unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0, width = 0, pres = 0; /* byte 0: n1 n0 . . . . R L */ fingers = (packet[0] & 0xc0) >> 6; @@ -271,14 +293,16 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse) * byte 1: . . . . . x10 x9 x8 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 */ - input_report_abs(dev, ABS_X, - ((packet[1] & 0x07) << 8) | packet[2]); + x1 = ((packet[1] & 0x07) << 8) | packet[2]; /* * byte 4: . . . . . . y9 y8 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 */ - input_report_abs(dev, ABS_Y, - ETP_YMAX_V2 - (((packet[4] & 0x03) << 8) | packet[5])); + y1 = ETP_YMAX_V2 - (((packet[4] & 0x03) << 8) | packet[5]); + + input_report_abs(dev, ABS_X, x1); + input_report_abs(dev, ABS_Y, y1); + pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); break; @@ -321,6 +345,7 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse) break; } + elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); @@ -495,6 +520,10 @@ static void elantech_set_input_params(struct psmouse *psmouse) input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, ETP_WMAX_V2, 0, 0); } + __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); + input_mt_init_slots(dev, 2); + input_set_abs_params(dev, ABS_MT_POSITION_X, ETP_XMIN_V2, ETP_XMAX_V2, 0, 0); + input_set_abs_params(dev, ABS_MT_POSITION_Y, ETP_YMIN_V2, ETP_YMAX_V2, 0, 0); input_set_abs_params(dev, ABS_HAT0X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0); input_set_abs_params(dev, ABS_HAT0Y, ETP_2FT_YMIN, ETP_2FT_YMAX, 0, 0); input_set_abs_params(dev, ABS_HAT1X, ETP_2FT_XMIN, ETP_2FT_XMAX, 0, 0); |