321 lines
6.9 KiB
C
321 lines
6.9 KiB
C
/*
|
|
* Penmount serial touchscreen driver
|
|
*
|
|
* Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
|
|
* Copyright (c) 2011 John Sung <penmount.touch@gmail.com>
|
|
*
|
|
* Based on ELO driver (drivers/input/touchscreen/elo.c)
|
|
* Copyright (c) 2004 Vojtech Pavlik
|
|
*/
|
|
|
|
/*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#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>
|
|
|
|
#define DRIVER_DESC "PenMount serial touchscreen driver"
|
|
|
|
MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
|
|
MODULE_AUTHOR("John Sung <penmount.touch@gmail.com>");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/*
|
|
* Definitions & global arrays.
|
|
*/
|
|
|
|
#define PM_MAX_LENGTH 6
|
|
#define PM_MAX_MTSLOT 16
|
|
#define PM_3000_MTSLOT 2
|
|
#define PM_6250_MTSLOT 12
|
|
|
|
/*
|
|
* Multi-touch slot
|
|
*/
|
|
|
|
struct mt_slot {
|
|
unsigned short x, y;
|
|
bool active; /* is the touch valid? */
|
|
};
|
|
|
|
/*
|
|
* Per-touchscreen data.
|
|
*/
|
|
|
|
struct pm {
|
|
struct input_dev *dev;
|
|
struct serio *serio;
|
|
int idx;
|
|
unsigned char data[PM_MAX_LENGTH];
|
|
char phys[32];
|
|
unsigned char packetsize;
|
|
unsigned char maxcontacts;
|
|
struct mt_slot slots[PM_MAX_MTSLOT];
|
|
void (*parse_packet)(struct pm *);
|
|
};
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
|
|
static bool pm_checkpacket(unsigned char *packet)
|
|
{
|
|
int total = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < 5; i++)
|
|
total += packet[i];
|
|
|
|
return packet[5] == (unsigned char)~(total & 0xff);
|
|
}
|
|
|
|
static void pm_parse_9000(struct pm *pm)
|
|
{
|
|
struct input_dev *dev = pm->dev;
|
|
|
|
if ((pm->data[0] & 0x80) && pm->packetsize == ++pm->idx) {
|
|
input_report_abs(dev, ABS_X, pm->data[1] * 128 + pm->data[2]);
|
|
input_report_abs(dev, ABS_Y, pm->data[3] * 128 + pm->data[4]);
|
|
input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
|
|
input_sync(dev);
|
|
pm->idx = 0;
|
|
}
|
|
}
|
|
|
|
static void pm_parse_6000(struct pm *pm)
|
|
{
|
|
struct input_dev *dev = pm->dev;
|
|
|
|
if ((pm->data[0] & 0xbf) == 0x30 && pm->packetsize == ++pm->idx) {
|
|
if (pm_checkpacket(pm->data)) {
|
|
input_report_abs(dev, ABS_X,
|
|
pm->data[2] * 256 + pm->data[1]);
|
|
input_report_abs(dev, ABS_Y,
|
|
pm->data[4] * 256 + pm->data[3]);
|
|
input_report_key(dev, BTN_TOUCH, pm->data[0] & 0x40);
|
|
input_sync(dev);
|
|
}
|
|
pm->idx = 0;
|
|
}
|
|
}
|
|
|
|
static void pm_parse_3000(struct pm *pm)
|
|
{
|
|
struct input_dev *dev = pm->dev;
|
|
|
|
if ((pm->data[0] & 0xce) == 0x40 && 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;
|
|
}
|
|
}
|
|
|
|
static void pm_parse_6250(struct pm *pm)
|
|
{
|
|
struct input_dev *dev = pm->dev;
|
|
|
|
if ((pm->data[0] & 0xb0) == 0x30 && pm->packetsize == ++pm->idx) {
|
|
if (pm_checkpacket(pm->data)) {
|
|
int slotnum = pm->data[0] & 0x0f;
|
|
pm->slots[slotnum].active = pm->data[0] & 0x40;
|
|
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;
|
|
}
|
|
}
|
|
|
|
static irqreturn_t pm_interrupt(struct serio *serio,
|
|
unsigned char data, unsigned int flags)
|
|
{
|
|
struct pm *pm = serio_get_drvdata(serio);
|
|
|
|
pm->data[pm->idx] = data;
|
|
|
|
pm->parse_packet(pm);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* pm_disconnect() is the opposite of pm_connect()
|
|
*/
|
|
|
|
static void pm_disconnect(struct serio *serio)
|
|
{
|
|
struct pm *pm = serio_get_drvdata(serio);
|
|
|
|
serio_close(serio);
|
|
|
|
input_unregister_device(pm->dev);
|
|
kfree(pm);
|
|
|
|
serio_set_drvdata(serio, NULL);
|
|
}
|
|
|
|
/*
|
|
* pm_connect() is the routine that is called when someone adds a
|
|
* new serio device that supports PenMount protocol and registers it as
|
|
* an input device.
|
|
*/
|
|
|
|
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);
|
|
input_dev = input_allocate_device();
|
|
if (!pm || !input_dev) {
|
|
err = -ENOMEM;
|
|
goto fail1;
|
|
}
|
|
|
|
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;
|
|
input_dev->id.bustype = BUS_RS232;
|
|
input_dev->id.vendor = SERIO_PENMOUNT;
|
|
input_dev->id.product = 0;
|
|
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);
|
|
|
|
switch (serio->id.id) {
|
|
default:
|
|
case 0:
|
|
pm->packetsize = 5;
|
|
pm->parse_packet = pm_parse_9000;
|
|
input_dev->id.product = 0x9000;
|
|
max_x = max_y = 0x3ff;
|
|
break;
|
|
|
|
case 1:
|
|
pm->packetsize = 6;
|
|
pm->parse_packet = pm_parse_6000;
|
|
input_dev->id.product = 0x6000;
|
|
max_x = max_y = 0x3ff;
|
|
break;
|
|
|
|
case 2:
|
|
pm->packetsize = 6;
|
|
pm->parse_packet = pm_parse_3000;
|
|
input_dev->id.product = 0x3000;
|
|
max_x = max_y = 0x7ff;
|
|
pm->maxcontacts = PM_3000_MTSLOT;
|
|
break;
|
|
|
|
case 3:
|
|
pm->packetsize = 6;
|
|
pm->parse_packet = pm_parse_6250;
|
|
input_dev->id.product = 0x6250;
|
|
max_x = max_y = 0x3ff;
|
|
pm->maxcontacts = PM_6250_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, 0);
|
|
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);
|
|
|
|
err = serio_open(serio, drv);
|
|
if (err)
|
|
goto fail2;
|
|
|
|
err = input_register_device(pm->dev);
|
|
if (err)
|
|
goto fail3;
|
|
|
|
return 0;
|
|
|
|
fail3: serio_close(serio);
|
|
fail2: serio_set_drvdata(serio, NULL);
|
|
fail1: input_free_device(input_dev);
|
|
kfree(pm);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* The serio driver structure.
|
|
*/
|
|
|
|
static struct serio_device_id pm_serio_ids[] = {
|
|
{
|
|
.type = SERIO_RS232,
|
|
.proto = SERIO_PENMOUNT,
|
|
.id = SERIO_ANY,
|
|
.extra = SERIO_ANY,
|
|
},
|
|
{ 0 }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(serio, pm_serio_ids);
|
|
|
|
static struct serio_driver pm_drv = {
|
|
.driver = {
|
|
.name = "serio-penmount",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.id_table = pm_serio_ids,
|
|
.interrupt = pm_interrupt,
|
|
.connect = pm_connect,
|
|
.disconnect = pm_disconnect,
|
|
};
|
|
|
|
module_serio_driver(pm_drv);
|