Input: penmount - add PenMount 3000 support
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>
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1 changed files with 75 additions and 4 deletions
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@ -19,6 +19,7 @@
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/input/mt.h>
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#include <linux/serio.h>
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#include <linux/init.h>
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@ -34,6 +35,17 @@ MODULE_LICENSE("GPL");
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*/
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#define PM_MAX_LENGTH 6
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#define PM_MAX_MTSLOT 16
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#define PM_3000_MTSLOT 2
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/*
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* Multi-touch slot
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*/
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struct mt_slot {
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unsigned short x, y;
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bool active; /* is the touch valid? */
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};
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/*
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* Per-touchscreen data.
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@ -46,8 +58,32 @@ struct pm {
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unsigned char data[PM_MAX_LENGTH];
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char phys[32];
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unsigned char packetsize;
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unsigned char maxcontacts;
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struct mt_slot slots[PM_MAX_MTSLOT];
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};
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/*
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* pm_mtevent() sends mt events and also emulates pointer movement
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*/
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static void pm_mtevent(struct pm *pm, struct input_dev *input)
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{
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int i;
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for (i = 0; i < pm->maxcontacts; ++i) {
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input_mt_slot(input, i);
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input_mt_report_slot_state(input, MT_TOOL_FINGER,
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pm->slots[i].active);
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if (pm->slots[i].active) {
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input_event(input, EV_ABS, ABS_MT_POSITION_X, pm->slots[i].x);
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input_event(input, EV_ABS, ABS_MT_POSITION_Y, pm->slots[i].y);
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}
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}
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input_mt_report_pointer_emulation(input, true);
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input_sync(input);
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}
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/*
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* pm_checkpacket() checks if data packet is valid
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*/
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@ -99,6 +135,21 @@ static irqreturn_t pm_interrupt(struct serio *serio,
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}
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}
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break;
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case 0x3000:
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if ((pm->data[0] & 0xce) == 0x40) {
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if (pm->packetsize == ++pm->idx) {
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if (pm_checkpacket(pm->data)) {
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int slotnum = pm->data[0] & 0x0f;
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pm->slots[slotnum].active = pm->data[0] & 0x30;
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pm->slots[slotnum].x = pm->data[2] * 256 + pm->data[1];
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pm->slots[slotnum].y = pm->data[4] * 256 + pm->data[3];
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pm_mtevent(pm, dev);
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}
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pm->idx = 0;
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}
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}
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break;
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}
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return IRQ_HANDLED;
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@ -130,6 +181,7 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
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{
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struct pm *pm;
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struct input_dev *input_dev;
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int max_x, max_y;
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int err;
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pm = kzalloc(sizeof(struct pm), GFP_KERNEL);
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@ -142,6 +194,7 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
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pm->serio = serio;
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pm->dev = input_dev;
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snprintf(pm->phys, sizeof(pm->phys), "%s/input0", serio->phys);
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pm->maxcontacts = 1;
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input_dev->name = "PenMount Serial TouchScreen";
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input_dev->phys = pm->phys;
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@ -151,22 +204,40 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
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input_dev->id.version = 0x0100;
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input_dev->dev.parent = &serio->dev;
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
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input_set_abs_params(pm->dev, ABS_X, 0, 0x3ff, 0, 0);
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input_set_abs_params(pm->dev, ABS_Y, 0, 0x3ff, 0, 0);
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
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switch (serio->id.id) {
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default:
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case 0:
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pm->packetsize = 5;
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input_dev->id.product = 0x9000;
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max_x = max_y = 0x3ff;
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break;
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case 1:
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pm->packetsize = 6;
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input_dev->id.product = 0x6000;
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max_x = max_y = 0x3ff;
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break;
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case 2:
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pm->packetsize = 6;
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input_dev->id.product = 0x3000;
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max_x = max_y = 0x7ff;
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pm->maxcontacts = PM_3000_MTSLOT;
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break;
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}
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input_set_abs_params(pm->dev, ABS_X, 0, max_x, 0, 0);
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input_set_abs_params(pm->dev, ABS_Y, 0, max_y, 0, 0);
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if (pm->maxcontacts > 1) {
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input_mt_init_slots(pm->dev, pm->maxcontacts);
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input_set_abs_params(pm->dev,
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ABS_MT_POSITION_X, 0, max_x, 0, 0);
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input_set_abs_params(pm->dev,
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ABS_MT_POSITION_Y, 0, max_y, 0, 0);
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}
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serio_set_drvdata(serio, pm);
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