HID: hid-multitouch: migrate 3M PCT touch screens to hid-multitouch

This patch merges the hid-3m-pct driver into hid-multitouch.
To keep devices working the same way they used to with hid-3m-pct,
we need to add two signal/noise ratios for width and height.
We also need to work on width/height to send proper
ABS_MT_ORIENTATION flag.

Importing 3M into hid-multitouch also solved the bug in which
devices handling width and height in their report descriptors
did not show ABS_MT_TOUCH_MAJOR and ABS_MT_TOUCH_MINOR.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Reviewed-by: Stéphane Chatty <chatty@enac.fr>
Reviewed-and-tested-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 0 insertions, 305 deletions

diff --git a/drivers/hid/hid-3m-pct.c b/drivers/hid/hid-3m-pct.c
deleted file mode 100644
index 5243ae2d3730..000000000000
--- a/drivers/hid/hid-3m-pct.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/*
- *  HID driver for 3M PCT multitouch panels
- *
- *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
- *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
- *  Copyright (c) 2010      Canonical, Ltd.
- *
- */
-
-/*
- * 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>
-#include <linux/input/mt.h>
-
-MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
-MODULE_DESCRIPTION("3M PCT multitouch panels");
-MODULE_LICENSE("GPL");
-
-#include "hid-ids.h"
-
-#define MAX_SLOTS		60
-
-/* estimated signal-to-noise ratios */
-#define SN_MOVE			2048
-#define SN_WIDTH		128
-
-struct mmm_finger {
-	__s32 x, y, w, h;
-	bool touch, valid;
-};
-
-struct mmm_data {
-	struct mmm_finger f[MAX_SLOTS];
-	__u8 curid;
-	__u8 nexp, nreal;
-	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)
-{
-	int f1 = field->logical_minimum;
-	int f2 = field->logical_maximum;
-	int df = f2 - f1;
-
-	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);
-			input_set_abs_params(hi->input, ABS_MT_POSITION_X,
-					     f1, f2, df / SN_MOVE, 0);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_X,
-					     f1, f2, df / SN_MOVE, 0);
-			return 1;
-		case HID_GD_Y:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_POSITION_Y);
-			input_set_abs_params(hi->input, ABS_MT_POSITION_Y,
-					     f1, f2, df / SN_MOVE, 0);
-			/* touchscreen emulation */
-			input_set_abs_params(hi->input, ABS_Y,
-					     f1, f2, df / SN_MOVE, 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);
-			input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
-			return 1;
-		case HID_DG_WIDTH:
-			hid_map_usage(hi, usage, bit, max,
-					EV_ABS, ABS_MT_TOUCH_MAJOR);
-			input_set_abs_params(hi->input, ABS_MT_TOUCH_MAJOR,
-					     f1, f2, df / SN_WIDTH, 0);
-			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_TOUCH_MINOR,
-					     f1, f2, df / SN_WIDTH, 0);
-			input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
-					0, 1, 0, 0);
-			return 1;
-		case HID_DG_CONTACTID:
-			input_mt_init_slots(hi->input, MAX_SLOTS);
-			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)
-{
-	/* tell hid-input to skip setup of these event types */
-	if (usage->type == EV_KEY || usage->type == EV_ABS)
-		set_bit(usage->type, hi->input->evbit);
-	return -1;
-}
-
-/*
- * 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)
-{
-	int i;
-	for (i = 0; i < MAX_SLOTS; ++i) {
-		struct mmm_finger *f = &md->f[i];
-		if (!f->valid) {
-			/* this finger is just placeholder data, ignore */
-			continue;
-		}
-		input_mt_slot(input, i);
-		input_mt_report_slot_state(input, MT_TOOL_FINGER, f->touch);
-		if (f->touch) {
-			/* this finger is on the screen */
-			int wide = (f->w > f->h);
-			/* divided by two to match visual scale of touch */
-			int major = max(f->w, f->h) >> 1;
-			int minor = min(f->w, f->h) >> 1;
-
-			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, major);
-			input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
-		}
-		f->valid = 0;
-	}
-
-	input_mt_report_pointer_emulation(input, true);
-	input_sync(input);
-}
-
-/*
- * 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:
-			value = clamp_val(value, 0, MAX_SLOTS - 1);
-			if (md->valid) {
-				md->curid = value;
-				md->f[value].touch = md->touch;
-				md->f[value].valid = 1;
-				md->nreal++;
-			}
-			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:
-			if (value)
-				md->nexp = value;
-			if (md->nreal >= md->nexp) {
-				mmm_filter_event(md, input);
-				md->nreal = 0;
-			}
-			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;
-
-	hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
-
-	md = kzalloc(sizeof(struct mmm_data), GFP_KERNEL);
-	if (!md) {
-		hid_err(hdev, "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);
-