mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 15:13:52 +00:00
7426ef52b4
Conflicts: drivers/hid/hid-wacom.c
317 lines
7.4 KiB
C
317 lines
7.4 KiB
C
/*
|
|
* HID driver for 3M PCT multitouch panels
|
|
*
|
|
* Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/hid.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/usb.h>
|
|
|
|
MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
|
|
MODULE_DESCRIPTION("3M PCT multitouch panels");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#include "hid-ids.h"
|
|
|
|
struct mmm_finger {
|
|
__s32 x, y, w, h;
|
|
__u8 rank;
|
|
bool touch, valid;
|
|
};
|
|
|
|
struct mmm_data {
|
|
struct mmm_finger f[10];
|
|
__u8 curid, num;
|
|
bool touch, valid;
|
|
};
|
|
|
|
static int mmm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
|
|
struct hid_field *field, struct hid_usage *usage,
|
|
unsigned long **bit, int *max)
|
|
{
|
|
switch (usage->hid & HID_USAGE_PAGE) {
|
|
|
|
case HID_UP_BUTTON:
|
|
return -1;
|
|
|
|
case HID_UP_GENDESK:
|
|
switch (usage->hid) {
|
|
case HID_GD_X:
|
|
hid_map_usage(hi, usage, bit, max,
|
|
EV_ABS, ABS_MT_POSITION_X);
|
|
/* touchscreen emulation */
|
|
input_set_abs_params(hi->input, ABS_X,
|
|
field->logical_minimum,
|
|
field->logical_maximum, 0, 0);
|
|
return 1;
|
|
case HID_GD_Y:
|
|
hid_map_usage(hi, usage, bit, max,
|
|
EV_ABS, ABS_MT_POSITION_Y);
|
|
/* touchscreen emulation */
|
|
input_set_abs_params(hi->input, ABS_Y,
|
|
field->logical_minimum,
|
|
field->logical_maximum, 0, 0);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
|
|
case HID_UP_DIGITIZER:
|
|
switch (usage->hid) {
|
|
/* we do not want to map these: no input-oriented meaning */
|
|
case 0x14:
|
|
case 0x23:
|
|
case HID_DG_INPUTMODE:
|
|
case HID_DG_DEVICEINDEX:
|
|
case HID_DG_CONTACTCOUNT:
|
|
case HID_DG_CONTACTMAX:
|
|
case HID_DG_INRANGE:
|
|
case HID_DG_CONFIDENCE:
|
|
return -1;
|
|
case HID_DG_TIPSWITCH:
|
|
/* touchscreen emulation */
|
|
hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
|
|
return 1;
|
|
case HID_DG_WIDTH:
|
|
hid_map_usage(hi, usage, bit, max,
|
|
EV_ABS, ABS_MT_TOUCH_MAJOR);
|
|
return 1;
|
|
case HID_DG_HEIGHT:
|
|
hid_map_usage(hi, usage, bit, max,
|
|
EV_ABS, ABS_MT_TOUCH_MINOR);
|
|
input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
|
|
1, 1, 0, 0);
|
|
return 1;
|
|
case HID_DG_CONTACTID:
|
|
field->logical_maximum = 59;
|
|
hid_map_usage(hi, usage, bit, max,
|
|
EV_ABS, ABS_MT_TRACKING_ID);
|
|
return 1;
|
|
}
|
|
/* let hid-input decide for the others */
|
|
return 0;
|
|
|
|
case 0xff000000:
|
|
/* we do not want to map these: no input-oriented meaning */
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mmm_input_mapped(struct hid_device *hdev, struct hid_input *hi,
|
|
struct hid_field *field, struct hid_usage *usage,
|
|
unsigned long **bit, int *max)
|
|
{
|
|
if (usage->type == EV_KEY || usage->type == EV_ABS)
|
|
clear_bit(usage->code, *bit);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* this function is called when a whole packet has been received and processed,
|
|
* so that it can decide what to send to the input layer.
|
|
*/
|
|
static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
|
|
{
|
|
struct mmm_finger *oldest = 0;
|
|
bool pressed = false, released = false;
|
|
int i;
|
|
|
|
/*
|
|
* we need to iterate on all fingers to decide if we have a press
|
|
* or a release event in our touchscreen emulation.
|
|
*/
|
|
for (i = 0; i < 10; ++i) {
|
|
struct mmm_finger *f = &md->f[i];
|
|
if (!f->valid) {
|
|
/* this finger is just placeholder data, ignore */
|
|
} else if (f->touch) {
|
|
/* this finger is on the screen */
|
|
int wide = (f->w > f->h);
|
|
input_event(input, EV_ABS, ABS_MT_TRACKING_ID, i);
|
|
input_event(input, EV_ABS, ABS_MT_POSITION_X, f->x);
|
|
input_event(input, EV_ABS, ABS_MT_POSITION_Y, f->y);
|
|
input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
|
|
input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR,
|
|
wide ? f->w : f->h);
|
|
input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR,
|
|
wide ? f->h : f->w);
|
|
input_mt_sync(input);
|
|
/*
|
|
* touchscreen emulation: maintain the age rank
|
|
* of this finger, decide if we have a press
|
|
*/
|
|
if (f->rank == 0) {
|
|
f->rank = ++(md->num);
|
|
if (f->rank == 1)
|
|
pressed = true;
|
|
}
|
|
if (f->rank == 1)
|
|
oldest = f;
|
|
} else {
|
|
/* this finger took off the screen */
|
|
/* touchscreen emulation: maintain age rank of others */
|
|
int j;
|
|
|
|
for (j = 0; j < 10; ++j) {
|
|
struct mmm_finger *g = &md->f[j];
|
|
if (g->rank > f->rank) {
|
|
g->rank--;
|
|
if (g->rank == 1)
|
|
oldest = g;
|
|
}
|
|
}
|
|
f->rank = 0;
|
|
--(md->num);
|
|
if (md->num == 0)
|
|
released = true;
|
|
}
|
|
f->valid = 0;
|
|
}
|
|
|
|
/* touchscreen emulation */
|
|
if (oldest) {
|
|
if (pressed)
|
|
input_event(input, EV_KEY, BTN_TOUCH, 1);
|
|
input_event(input, EV_ABS, ABS_X, oldest->x);
|
|
input_event(input, EV_ABS, ABS_Y, oldest->y);
|
|
} else if (released) {
|
|
input_event(input, EV_KEY, BTN_TOUCH, 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* this function is called upon all reports
|
|
* so that we can accumulate contact point information,
|
|
* and call input_mt_sync after each point.
|
|
*/
|
|
static int mmm_event(struct hid_device *hid, struct hid_field *field,
|
|
struct hid_usage *usage, __s32 value)
|
|
{
|
|
struct mmm_data *md = hid_get_drvdata(hid);
|
|
/*
|
|
* strangely, this function can be called before
|
|
* field->hidinput is initialized!
|
|
*/
|
|
if (hid->claimed & HID_CLAIMED_INPUT) {
|
|
struct input_dev *input = field->hidinput->input;
|
|
switch (usage->hid) {
|
|
case HID_DG_TIPSWITCH:
|
|
md->touch = value;
|
|
break;
|
|
case HID_DG_CONFIDENCE:
|
|
md->valid = value;
|
|
break;
|
|
case HID_DG_WIDTH:
|
|
if (md->valid)
|
|
md->f[md->curid].w = value;
|
|
break;
|
|
case HID_DG_HEIGHT:
|
|
if (md->valid)
|
|
md->f[md->curid].h = value;
|
|
break;
|
|
case HID_DG_CONTACTID:
|
|
if (md->valid) {
|
|
md->curid = value;
|
|
md->f[value].touch = md->touch;
|
|
md->f[value].valid = 1;
|
|
}
|
|
break;
|
|
case HID_GD_X:
|
|
if (md->valid)
|
|
md->f[md->curid].x = value;
|
|
break;
|
|
case HID_GD_Y:
|
|
if (md->valid)
|
|
md->f[md->curid].y = value;
|
|
break;
|
|
case HID_DG_CONTACTCOUNT:
|
|
mmm_filter_event(md, input);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* we have handled the hidinput part, now remains hiddev */
|
|
if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
|
|
hid->hiddev_hid_event(hid, field, usage, value);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int mmm_probe(struct hid_device *hdev, const struct hid_device_id *id)
|
|
{
|
|
int ret;
|
|
struct mmm_data *md;
|
|
|
|
md = kzalloc(sizeof(struct mmm_data), GFP_KERNEL);
|
|
if (!md) {
|
|
dev_err(&hdev->dev, "cannot allocate 3M data\n");
|
|
return -ENOMEM;
|
|
}
|
|
hid_set_drvdata(hdev, md);
|
|
|
|
ret = hid_parse(hdev);
|
|
if (!ret)
|
|
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
|
|
|
|
if (ret)
|
|
kfree(md);
|
|
return ret;
|
|
}
|
|
|
|
static void mmm_remove(struct hid_device *hdev)
|
|
{
|
|
hid_hw_stop(hdev);
|
|
kfree(hid_get_drvdata(hdev));
|
|
hid_set_drvdata(hdev, NULL);
|
|
}
|
|
|
|
static const struct hid_device_id mmm_devices[] = {
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, mmm_devices);
|
|
|
|
static const struct hid_usage_id mmm_grabbed_usages[] = {
|
|
{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
|
|
{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
|
|
};
|
|
|
|
static struct hid_driver mmm_driver = {
|
|
.name = "3m-pct",
|
|
.id_table = mmm_devices,
|
|
.probe = mmm_probe,
|
|
.remove = mmm_remove,
|
|
.input_mapping = mmm_input_mapping,
|
|
.input_mapped = mmm_input_mapped,
|
|
.usage_table = mmm_grabbed_usages,
|
|
.event = mmm_event,
|
|
};
|
|
|
|
static int __init mmm_init(void)
|
|
{
|
|
return hid_register_driver(&mmm_driver);
|
|
}
|
|
|
|
static void __exit mmm_exit(void)
|
|
{
|
|
hid_unregister_driver(&mmm_driver);
|
|
}
|
|
|
|
module_init(mmm_init);
|
|
module_exit(mmm_exit);
|
|
|