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HID: Support for 3M multitouch panel
Add support for 3M multitouch panels. Signed-off-by: Stephane Chatty <chatty@enac.fr> [jkosina@suse.cz: fix build failure because of inconsistent 3M/MMM defines] Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Stephane Chatty
Jiri Kosina
parent
3067e02f8f
commit
b6353f4f36
@ -55,6 +55,13 @@ source "drivers/hid/usbhid/Kconfig"
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menu "Special HID drivers"
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depends on HID
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config HID_3M_PCT
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tristate "3M PCT" if EMBEDDED
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depends on USB_HID
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default !EMBEDDED
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---help---
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Support for 3M PCT touch screens.
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config HID_A4TECH
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tristate "A4 tech" if EMBEDDED
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depends on USB_HID
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@ -19,6 +19,7 @@ ifdef CONFIG_LOGIRUMBLEPAD2_FF
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hid-logitech-objs += hid-lg2ff.o
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endif
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obj-$(CONFIG_HID_3M_PCT) += hid-3m-pct.o
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obj-$(CONFIG_HID_A4TECH) += hid-a4tech.o
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obj-$(CONFIG_HID_APPLE) += hid-apple.o
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obj-$(CONFIG_HID_BELKIN) += hid-belkin.o
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291
drivers/hid/hid-3m-pct.c
Normal file
291
drivers/hid/hid-3m-pct.c
Normal file
@ -0,0 +1,291 @@
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/*
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* HID driver for 3M PCT multitouch panels
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*
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* Copyright (c) 2009 Stephane Chatty <chatty@enac.fr>
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*
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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MODULE_VERSION("0.6");
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MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
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MODULE_DESCRIPTION("3M PCT multitouch panels");
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MODULE_LICENSE("GPL");
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#include "hid-ids.h"
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struct mmm_finger {
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__s32 x, y;
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__u8 rank;
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bool touch, valid;
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};
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struct mmm_data {
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struct mmm_finger f[10];
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__u8 curid, num;
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bool touch, valid;
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};
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static int mmm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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switch (usage->hid & HID_USAGE_PAGE) {
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case HID_UP_BUTTON:
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return -1;
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case HID_UP_GENDESK:
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switch (usage->hid) {
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case HID_GD_X:
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hid_map_usage(hi, usage, bit, max,
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EV_ABS, ABS_MT_POSITION_X);
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/* touchscreen emulation */
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input_set_abs_params(hi->input, ABS_X,
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field->logical_minimum,
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field->logical_maximum, 0, 0);
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return 1;
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case HID_GD_Y:
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hid_map_usage(hi, usage, bit, max,
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EV_ABS, ABS_MT_POSITION_Y);
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/* touchscreen emulation */
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input_set_abs_params(hi->input, ABS_Y,
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field->logical_minimum,
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field->logical_maximum, 0, 0);
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return 1;
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}
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return 0;
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case HID_UP_DIGITIZER:
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switch (usage->hid) {
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/* we do not want to map these: no input-oriented meaning */
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case 0x14:
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case 0x23:
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case HID_DG_INPUTMODE:
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case HID_DG_DEVICEINDEX:
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case HID_DG_CONTACTCOUNT:
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case HID_DG_CONTACTMAX:
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case HID_DG_INRANGE:
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case HID_DG_CONFIDENCE:
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return -1;
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case HID_DG_TIPSWITCH:
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/* touchscreen emulation */
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hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
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return 1;
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case HID_DG_CONTACTID:
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hid_map_usage(hi, usage, bit, max,
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EV_ABS, ABS_MT_TRACKING_ID);
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return 1;
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}
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/* let hid-input decide for the others */
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return 0;
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case 0xff000000:
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/* we do not want to map these: no input-oriented meaning */
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return -1;
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}
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return 0;
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}
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static int mmm_input_mapped(struct hid_device *hdev, struct hid_input *hi,
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struct hid_field *field, struct hid_usage *usage,
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unsigned long **bit, int *max)
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{
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if (usage->type == EV_KEY || usage->type == EV_ABS)
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clear_bit(usage->code, *bit);
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return 0;
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}
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/*
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* this function is called when a whole packet has been received and processed,
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* so that it can decide what to send to the input layer.
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*/
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static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
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{
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struct mmm_finger *oldest = 0;
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bool pressed = false, released = false;
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int i;
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/*
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* we need to iterate on all fingers to decide if we have a press
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* or a release event in our touchscreen emulation.
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*/
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for (i = 0; i < 10; ++i) {
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struct mmm_finger *f = &md->f[i];
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if (!f->valid) {
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/* this finger is just placeholder data, ignore */
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} else if (f->touch) {
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/* this finger is on the screen */
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input_event(input, EV_ABS, ABS_MT_TRACKING_ID, i);
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input_event(input, EV_ABS, ABS_MT_POSITION_X, f->x);
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input_event(input, EV_ABS, ABS_MT_POSITION_Y, f->y);
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input_mt_sync(input);
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/*
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* touchscreen emulation: maintain the age rank
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* of this finger, decide if we have a press
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*/
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if (f->rank == 0) {
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f->rank = ++(md->num);
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if (f->rank == 1)
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pressed = true;
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}
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if (f->rank == 1)
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oldest = f;
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} else {
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/* this finger took off the screen */
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/* touchscreen emulation: maintain age rank of others */
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int j;
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for (j = 0; j < 10; ++j) {
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struct mmm_finger *g = &md->f[j];
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if (g->rank > f->rank) {
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g->rank--;
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if (g->rank == 1)
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oldest = g;
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}
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}
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f->rank = 0;
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--(md->num);
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if (md->num == 0)
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released = true;
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}
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f->valid = 0;
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}
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/* touchscreen emulation */
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if (oldest) {
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if (pressed)
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input_event(input, EV_KEY, BTN_TOUCH, 1);
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input_event(input, EV_ABS, ABS_X, oldest->x);
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input_event(input, EV_ABS, ABS_Y, oldest->y);
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} else if (released) {
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input_event(input, EV_KEY, BTN_TOUCH, 0);
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}
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}
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/*
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* this function is called upon all reports
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* so that we can accumulate contact point information,
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* and call input_mt_sync after each point.
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*/
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static int mmm_event(struct hid_device *hid, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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struct mmm_data *md = hid_get_drvdata(hid);
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/*
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* strangely, this function can be called before
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* field->hidinput is initialized!
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*/
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if (hid->claimed & HID_CLAIMED_INPUT) {
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struct input_dev *input = field->hidinput->input;
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switch (usage->hid) {
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case HID_DG_TIPSWITCH:
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md->touch = value;
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break;
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case HID_DG_CONFIDENCE:
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md->valid = value;
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break;
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case HID_DG_CONTACTID:
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if (md->valid) {
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md->curid = value;
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md->f[value].touch = md->touch;
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md->f[value].valid = 1;
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}
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break;
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case HID_GD_X:
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if (md->valid)
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md->f[md->curid].x = value;
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break;
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case HID_GD_Y:
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if (md->valid)
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md->f[md->curid].y = value;
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break;
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case HID_DG_CONTACTCOUNT:
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mmm_filter_event(md, input);
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break;
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}
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}
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/* we have handled the hidinput part, now remains hiddev */
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if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
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hid->hiddev_hid_event(hid, field, usage, value);
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return 1;
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}
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static int mmm_probe(struct hid_device *hdev, const struct hid_device_id *id)
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{
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int ret;
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struct mmm_data *md;
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md = kzalloc(sizeof(struct mmm_data), GFP_KERNEL);
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if (!md) {
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dev_err(&hdev->dev, "cannot allocate 3M data\n");
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return -ENOMEM;
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}
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hid_set_drvdata(hdev, md);
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ret = hid_parse(hdev);
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if (!ret)
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (ret)
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kfree(md);
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return ret;
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}
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static void mmm_remove(struct hid_device *hdev)
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{
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hid_hw_stop(hdev);
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kfree(hid_get_drvdata(hdev));
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hid_set_drvdata(hdev, NULL);
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}
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static const struct hid_device_id mmm_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, mmm_devices);
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static const struct hid_usage_id mmm_grabbed_usages[] = {
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{ HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
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{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
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};
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static struct hid_driver mmm_driver = {
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.name = "3m-pct",
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.id_table = mmm_devices,
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.probe = mmm_probe,
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.remove = mmm_remove,
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.input_mapping = mmm_input_mapping,
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.input_mapped = mmm_input_mapped,
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.usage_table = mmm_grabbed_usages,
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.event = mmm_event,
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};
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static int __init mmm_init(void)
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{
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return hid_register_driver(&mmm_driver);
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}
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static void __exit mmm_exit(void)
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{
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hid_unregister_driver(&mmm_driver);
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}
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module_init(mmm_init);
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module_exit(mmm_exit);
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MODULE_LICENSE("GPL");
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@ -1248,6 +1248,7 @@ EXPORT_SYMBOL_GPL(hid_disconnect);
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/* a list of devices for which there is a specialized driver on HID bus */
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static const struct hid_device_id hid_blacklist[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
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{ HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ATV_IRCONTROL) },
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@ -18,6 +18,9 @@
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#ifndef HID_IDS_H_FILE
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#define HID_IDS_H_FILE
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#define USB_VENDOR_ID_3M 0x0596
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#define USB_DEVICE_ID_3M1968 0x0500
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#define USB_VENDOR_ID_A4TECH 0x09da
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#define USB_DEVICE_ID_A4TECH_WCP32PU 0x0006
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#define USB_DEVICE_ID_A4TECH_X5_005D 0x000a
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