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Input: penmount - add PenMount 3000 support

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Add dual touch support for PenMount 3000 touch controller.

Signed-off-by: John Sung <penmount.touch@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
John Sung 2011-09-09 13:33:12 -07:00 committed by Dmitry Torokhov
parent c42e2e406a
commit 90aba7d8b1
1 changed files with 75 additions and 4 deletions
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79
drivers/input/touchscreen/penmount.c
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@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/serio.h>
#include <linux/init.h>
@ -34,6 +35,17 @@ MODULE_LICENSE("GPL");
*/
#define PM_MAX_LENGTH 6
#define PM_MAX_MTSLOT 16
#define PM_3000_MTSLOT 2
/*
* Multi-touch slot
*/
struct mt_slot {
unsigned short x, y;
bool active; /* is the touch valid? */
};
/*
* Per-touchscreen data.
@ -46,8 +58,32 @@ struct pm {
unsigned char data[PM_MAX_LENGTH];
char phys[32];
unsigned char packetsize;
unsigned char maxcontacts;
struct mt_slot slots[PM_MAX_MTSLOT];
};
/*
* pm_mtevent() sends mt events and also emulates pointer movement
*/
static void pm_mtevent(struct pm *pm, struct input_dev *input)
{
int i;
for (i = 0; i < pm->maxcontacts; ++i) {
input_mt_slot(input, i);
input_mt_report_slot_state(input, MT_TOOL_FINGER,
pm->slots[i].active);
if (pm->slots[i].active) {
input_event(input, EV_ABS, ABS_MT_POSITION_X, pm->slots[i].x);
input_event(input, EV_ABS, ABS_MT_POSITION_Y, pm->slots[i].y);
}
}
input_mt_report_pointer_emulation(input, true);
input_sync(input);
}
/*
* pm_checkpacket() checks if data packet is valid
*/
@ -99,6 +135,21 @@ static irqreturn_t pm_interrupt(struct serio *serio,
}
}
break;
case 0x3000:
if ((pm->data[0] & 0xce) == 0x40) {
if (pm->packetsize == ++pm->idx) {
if (pm_checkpacket(pm->data)) {
int slotnum = pm->data[0] & 0x0f;
pm->slots[slotnum].active = pm->data[0] & 0x30;
pm->slots[slotnum].x = pm->data[2] * 256 + pm->data[1];
pm->slots[slotnum].y = pm->data[4] * 256 + pm->data[3];
pm_mtevent(pm, dev);
}
pm->idx = 0;
}
}
break;
}
return IRQ_HANDLED;
@ -130,6 +181,7 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
{
struct pm *pm;
struct input_dev *input_dev;
int max_x, max_y;
int err;
pm = kzalloc(sizeof(struct pm), GFP_KERNEL);
@ -142,6 +194,7 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
pm->serio = serio;
pm->dev = input_dev;
snprintf(pm->phys, sizeof(pm->phys), "%s/input0", serio->phys);
pm->maxcontacts = 1;
input_dev->name = "PenMount Serial TouchScreen";
input_dev->phys = pm->phys;
@ -151,22 +204,40 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
input_dev->id.version = 0x0100;
input_dev->dev.parent = &serio->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(pm->dev, ABS_X, 0, 0x3ff, 0, 0);
input_set_abs_params(pm->dev, ABS_Y, 0, 0x3ff, 0, 0);
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
switch (serio->id.id) {
default:
case 0:
pm->packetsize = 5;
input_dev->id.product = 0x9000;
max_x = max_y = 0x3ff;
break;
case 1:
pm->packetsize = 6;
input_dev->id.product = 0x6000;
max_x = max_y = 0x3ff;
break;
case 2:
pm->packetsize = 6;
input_dev->id.product = 0x3000;
max_x = max_y = 0x7ff;
pm->maxcontacts = PM_3000_MTSLOT;
break;
}
input_set_abs_params(pm->dev, ABS_X, 0, max_x, 0, 0);
input_set_abs_params(pm->dev, ABS_Y, 0, max_y, 0, 0);
if (pm->maxcontacts > 1) {
input_mt_init_slots(pm->dev, pm->maxcontacts);
input_set_abs_params(pm->dev,
ABS_MT_POSITION_X, 0, max_x, 0, 0);
input_set_abs_params(pm->dev,
ABS_MT_POSITION_Y, 0, max_y, 0, 0);
}
serio_set_drvdata(serio, pm);