summaryrefslogtreecommitdiff
path: root/drivers/input/mouse/synaptics_usb.c
blob: b5ff27e32a0c8a8282f426c13beb527231b77c61 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * USB Synaptics device driver
 *
 *  Copyright (c) 2002 Rob Miller (rob@inpharmatica . co . uk)
 *  Copyright (c) 2003 Ron Lee (ron@debian.org)
 *	cPad driver for kernel 2.4
 *
 *  Copyright (c) 2004 Jan Steinhoff (cpad@jan-steinhoff . de)
 *  Copyright (c) 2004 Ron Lee (ron@debian.org)
 *	rewritten for kernel 2.6
 *
 *  cPad display character device part is not included. It can be found at
 *  http://jan-steinhoff.de/linux/synaptics-usb.html
 *
 * Bases on:	usb_skeleton.c v2.2 by Greg Kroah-Hartman
 *		drivers/hid/usbhid/usbmouse.c by Vojtech Pavlik
 *		drivers/input/mouse/synaptics.c by Peter Osterlund
 *
 * Trademarks are the property of their respective owners.
 */

/*
 * There are three different types of Synaptics USB devices: Touchpads,
 * touchsticks (or trackpoints), and touchscreens. Touchpads are well supported
 * by this driver, touchstick support has not been tested much yet, and
 * touchscreens have not been tested at all.
 *
 * Up to three alternate settings are possible:
 *	setting 0: one int endpoint for relative movement (used by usbhid.ko)
 *	setting 1: one int endpoint for absolute finger position
 *	setting 2 (cPad only): one int endpoint for absolute finger position and
 *		   two bulk endpoints for the display (in/out)
 * This driver uses setting 1.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/usb.h>
#include <linux/input.h>
#include <linux/usb/input.h>

#define USB_VENDOR_ID_SYNAPTICS	0x06cb
#define USB_DEVICE_ID_SYNAPTICS_TP	0x0001	/* Synaptics USB TouchPad */
#define USB_DEVICE_ID_SYNAPTICS_INT_TP	0x0002	/* Integrated USB TouchPad */
#define USB_DEVICE_ID_SYNAPTICS_CPAD	0x0003	/* Synaptics cPad */
#define USB_DEVICE_ID_SYNAPTICS_TS	0x0006	/* Synaptics TouchScreen */
#define USB_DEVICE_ID_SYNAPTICS_STICK	0x0007	/* Synaptics USB Styk */
#define USB_DEVICE_ID_SYNAPTICS_WP	0x0008	/* Synaptics USB WheelPad */
#define USB_DEVICE_ID_SYNAPTICS_COMP_TP	0x0009	/* Composite USB TouchPad */
#define USB_DEVICE_ID_SYNAPTICS_WTP	0x0010	/* Wireless TouchPad */
#define USB_DEVICE_ID_SYNAPTICS_DPAD	0x0013	/* DisplayPad */

#define SYNUSB_TOUCHPAD			(1 << 0)
#define SYNUSB_STICK			(1 << 1)
#define SYNUSB_TOUCHSCREEN		(1 << 2)
#define SYNUSB_AUXDISPLAY		(1 << 3) /* For cPad */
#define SYNUSB_COMBO			(1 << 4) /* Composite device (TP + stick) */
#define SYNUSB_IO_ALWAYS		(1 << 5)

#define USB_DEVICE_SYNAPTICS(prod, kind)		\
	USB_DEVICE(USB_VENDOR_ID_SYNAPTICS,		\
		   USB_DEVICE_ID_SYNAPTICS_##prod),	\
	.driver_info = (kind),

#define SYNUSB_RECV_SIZE	8

#define XMIN_NOMINAL		1472
#define XMAX_NOMINAL		5472
#define YMIN_NOMINAL		1408
#define YMAX_NOMINAL		4448

struct synusb {
	struct usb_device *udev;
	struct usb_interface *intf;
	struct urb *urb;
	unsigned char *data;

	/* serialize access to open/suspend */
	struct mutex pm_mutex;
	bool is_open;

	/* input device related data structures */
	struct input_dev *input;
	char name[128];
	char phys[64];

	/* characteristics of the device */
	unsigned long flags;
};

static void synusb_report_buttons(struct synusb *synusb)
{
	struct input_dev *input_dev = synusb->input;

	input_report_key(input_dev, BTN_LEFT, synusb->data[1] & 0x04);
	input_report_key(input_dev, BTN_RIGHT, synusb->data[1] & 0x01);
	input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x02);
}

static void synusb_report_stick(struct synusb *synusb)
{
	struct input_dev *input_dev = synusb->input;
	int x, y;
	unsigned int pressure;

	pressure = synusb->data[6];
	x = (s16)(be16_to_cpup((__be16 *)&synusb->data[2]) << 3) >> 7;
	y = (s16)(be16_to_cpup((__be16 *)&synusb->data[4]) << 3) >> 7;

	if (pressure > 0) {
		input_report_rel(input_dev, REL_X, x);
		input_report_rel(input_dev, REL_Y, -y);
	}

	input_report_abs(input_dev, ABS_PRESSURE, pressure);

	synusb_report_buttons(synusb);

	input_sync(input_dev);
}

static void synusb_report_touchpad(struct synusb *synusb)
{
	struct input_dev *input_dev = synusb->input;
	unsigned int num_fingers, tool_width;
	unsigned int x, y;
	unsigned int pressure, w;

	pressure = synusb->data[6];
	x = be16_to_cpup((__be16 *)&synusb->data[2]);
	y = be16_to_cpup((__be16 *)&synusb->data[4]);
	w = synusb->data[0] & 0x0f;

	if (pressure > 0) {
		num_fingers = 1;
		tool_width = 5;
		switch (w) {
		case 0 ... 1:
			num_fingers = 2 + w;
			break;

		case 2:	                /* pen, pretend its a finger */
			break;

		case 4 ... 15:
			tool_width = w;
			break;
		}
	} else {
		num_fingers = 0;
		tool_width = 0;
	}

	/*
	 * Post events
	 * BTN_TOUCH has to be first as mousedev relies on it when doing
	 * absolute -> relative conversion
	 */

	if (pressure > 30)
		input_report_key(input_dev, BTN_TOUCH, 1);
	if (pressure < 25)
		input_report_key(input_dev, BTN_TOUCH, 0);

	if (num_fingers > 0) {
		input_report_abs(input_dev, ABS_X, x);
		input_report_abs(input_dev, ABS_Y,
				 YMAX_NOMINAL + YMIN_NOMINAL - y);
	}

	input_report_abs(input_dev, ABS_PRESSURE, pressure);
	input_report_abs(input_dev, ABS_TOOL_WIDTH, tool_width);

	input_report_key(input_dev, BTN_TOOL_FINGER, num_fingers == 1);
	input_report_key(input_dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
	input_report_key(input_dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);

	synusb_report_buttons(synusb);
	if (synusb->flags & SYNUSB_AUXDISPLAY)
		input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x08);

	input_sync(input_dev);
}

static void synusb_irq(struct urb *urb)
{
	struct synusb *synusb = urb->context;
	int error;

	/* Check our status in case we need to bail out early. */
	switch (urb->status) {
	case 0:
		usb_mark_last_busy(synusb->udev);
		break;

	/* Device went away so don't keep trying to read from it. */
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		return;

	default:
		goto resubmit;
		break;
	}

	if (synusb->flags & SYNUSB_STICK)
		synusb_report_stick(synusb);
	else
		synusb_report_touchpad(synusb);

resubmit:
	error = usb_submit_urb(urb, GFP_ATOMIC);
	if (error && error != -EPERM)
		dev_err(&synusb->intf->dev,
			"%s - usb_submit_urb failed with result: %d",
			__func__, error);
}

static struct usb_endpoint_descriptor *
synusb_get_in_endpoint(struct usb_host_interface *iface)
{

	struct usb_endpoint_descriptor *endpoint;
	int i;

	for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
		endpoint = &iface->endpoint[i].desc;

		if (usb_endpoint_is_int_in(endpoint)) {
			/* we found our interrupt in endpoint */
			return endpoint;
		}
	}

	return NULL;
}

static int synusb_open(struct input_dev *dev)
{
	struct synusb *synusb = input_get_drvdata(dev);
	int retval;

	retval = usb_autopm_get_interface(synusb->intf);
	if (retval) {
		dev_err(&synusb->intf->dev,
			"%s - usb_autopm_get_interface failed, error: %d\n",
			__func__, retval);
		return retval;
	}

	mutex_lock(&synusb->pm_mutex);
	retval = usb_submit_urb(synusb->urb, GFP_KERNEL);
	if (retval) {
		dev_err(&synusb->intf->dev,
			"%s - usb_submit_urb failed, error: %d\n",
			__func__, retval);
		retval = -EIO;
		goto out;
	}

	synusb->intf->needs_remote_wakeup = 1;
	synusb->is_open = true;

out:
	mutex_unlock(&synusb->pm_mutex);
	usb_autopm_put_interface(synusb->intf);
	return retval;
}

static void synusb_close(struct input_dev *dev)
{
	struct synusb *synusb = input_get_drvdata(dev);
	int autopm_error;

	autopm_error = usb_autopm_get_interface(synusb->intf);

	mutex_lock(&synusb->pm_mutex);
	usb_kill_urb(synusb->urb);
	synusb->intf->needs_remote_wakeup = 0;
	synusb->is_open = false;
	mutex_unlock(&synusb->pm_mutex);

	if (!autopm_error)
		usb_autopm_put_interface(synusb->intf);
}

static int synusb_probe(struct usb_interface *intf,
			const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct usb_endpoint_descriptor *ep;
	struct synusb *synusb;
	struct input_dev *input_dev;
	unsigned int intf_num = intf->cur_altsetting->desc.bInterfaceNumber;
	unsigned int altsetting = min(intf->num_altsetting, 1U);
	int error;

	error = usb_set_interface(udev, intf_num, altsetting);
	if (error) {
		dev_err(&udev->dev,
			"Can not set alternate setting to %i, error: %i",
			altsetting, error);
		return error;
	}

	ep = synusb_get_in_endpoint(intf->cur_altsetting);
	if (!ep)
		return -ENODEV;

	synusb = kzalloc(sizeof(*synusb), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!synusb || !input_dev) {
		error = -ENOMEM;
		goto err_free_mem;
	}

	synusb->udev = udev;
	synusb->intf = intf;
	synusb->input = input_dev;
	mutex_init(&synusb->pm_mutex);

	synusb->flags = id->driver_info;
	if (synusb->flags & SYNUSB_COMBO) {
		/*
		 * This is a combo device, we need to set proper
		 * capability, depending on the interface.
		 */
		synusb->flags |= intf_num == 1 ?
					SYNUSB_STICK : SYNUSB_TOUCHPAD;
	}

	synusb->urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!synusb->urb) {
		error = -ENOMEM;
		goto err_free_mem;
	}

	synusb->data = usb_alloc_coherent(udev, SYNUSB_RECV_SIZE, GFP_KERNEL,
					  &synusb->urb->transfer_dma);
	if (!synusb->data) {
		error = -ENOMEM;
		goto err_free_urb;
	}

	usb_fill_int_urb(synusb->urb, udev,
			 usb_rcvintpipe(udev, ep->bEndpointAddress),
			 synusb->data, SYNUSB_RECV_SIZE,
			 synusb_irq, synusb,
			 ep->bInterval);
	synusb->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	if (udev->manufacturer)
		strlcpy(synusb->name, udev->manufacturer,
			sizeof(synusb->name));

	if (udev->product) {
		if (udev->manufacturer)
			strlcat(synusb->name, " ", sizeof(synusb->name));
		strlcat(synusb->name, udev->product, sizeof(synusb->name));
	}

	if (!strlen(synusb->name))
		snprintf(synusb->name, sizeof(synusb->name),
			 "USB Synaptics Device %04x:%04x",
			 le16_to_cpu(udev->descriptor.idVendor),
			 le16_to_cpu(udev->descriptor.idProduct));

	if (synusb->flags & SYNUSB_STICK)
		strlcat(synusb->name, " (Stick)", sizeof(synusb->name));

	usb_make_path(udev, synusb->phys, sizeof(synusb->phys));
	strlcat(synusb->phys, "/input0", sizeof(synusb->phys));

	input_dev->name = synusb->name;
	input_dev->phys = synusb->phys;
	usb_to_input_id(udev, &input_dev->id);
	input_dev->dev.parent = &synusb->intf->dev;

	if (!(synusb->flags & SYNUSB_IO_ALWAYS)) {
		input_dev->open = synusb_open;
		input_dev->close = synusb_close;
	}

	input_set_drvdata(input_dev, synusb);

	__set_bit(EV_ABS, input_dev->evbit);
	__set_bit(EV_KEY, input_dev->evbit);

	if (synusb->flags & SYNUSB_STICK) {
		__set_bit(EV_REL, input_dev->evbit);
		__set_bit(REL_X, input_dev->relbit);
		__set_bit(REL_Y, input_dev->relbit);
		__set_bit(INPUT_PROP_POINTING_STICK, input_dev->propbit);
		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 127, 0, 0);
	} else {
		input_set_abs_params(input_dev, ABS_X,
				     XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
		input_set_abs_params(input_dev, ABS_Y,
				     YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
		input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
		__set_bit(BTN_TOUCH, input_dev->keybit);
		__set_bit(BTN_TOOL_FINGER, input_dev->keybit);
		__set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
		__set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
	}

	if (synusb->flags & SYNUSB_TOUCHSCREEN)
		__set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
	else
		__set_bit(INPUT_PROP_POINTER, input_dev->propbit);

	__set_bit(BTN_LEFT, input_dev->keybit);
	__set_bit(BTN_RIGHT, input_dev->keybit);
	__set_bit(BTN_MIDDLE, input_dev->keybit);

	usb_set_intfdata(intf, synusb);

	if (synusb->flags & SYNUSB_IO_ALWAYS) {
		error = synusb_open(input_dev);
		if (error)
			goto err_free_dma;
	}

	error = input_register_device(input_dev);
	if (error) {
		dev_err(&udev->dev,
			"Failed to register input device, error %d\n",
			error);
		goto err_stop_io;
	}

	return 0;

err_stop_io:
	if (synusb->flags & SYNUSB_IO_ALWAYS)
		synusb_close(synusb->input);
err_free_dma:
	usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
			  synusb->urb->transfer_dma);
err_free_urb:
	usb_free_urb(synusb->urb);
err_free_mem:
	input_free_device(input_dev);
	kfree(synusb);
	usb_set_intfdata(intf, NULL);

	return error;
}

static void synusb_disconnect(struct usb_interface *intf)
{
	struct synusb *synusb = usb_get_intfdata(intf);
	struct usb_device *udev = interface_to_usbdev(intf);

	if (synusb->flags & SYNUSB_IO_ALWAYS)
		synusb_close(synusb->input);

	input_unregister_device(synusb->input);

	usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
			  synusb->urb->transfer_dma);
	usb_free_urb(synusb->urb);
	kfree(synusb);

	usb_set_intfdata(intf, NULL);
}

static int synusb_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct synusb *synusb = usb_get_intfdata(intf);

	mutex_lock(&synusb->pm_mutex);
	usb_kill_urb(synusb->urb);
	mutex_unlock(&synusb->pm_mutex);

	return 0;
}

static int synusb_resume(struct usb_interface *intf)
{
	struct synusb *synusb = usb_get_intfdata(intf);
	int retval = 0;

	mutex_lock(&synusb->pm_mutex);

	if ((synusb->is_open || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
	    usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
		retval = -EIO;
	}

	mutex_unlock(&synusb->pm_mutex);

	return retval;
}

static int synusb_pre_reset(struct usb_interface *intf)
{
	struct synusb *synusb = usb_get_intfdata(intf);

	mutex_lock(&synusb->pm_mutex);
	usb_kill_urb(synusb->urb);

	return 0;
}

static int synusb_post_reset(struct usb_interface *intf)
{
	struct synusb *synusb = usb_get_intfdata(intf);
	int retval = 0;

	if ((synusb->is_open || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
	    usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
		retval = -EIO;
	}

	mutex_unlock(&synusb->pm_mutex);

	return retval;
}

static int synusb_reset_resume(struct usb_interface *intf)
{
	return synusb_resume(intf);
}

static const struct usb_device_id synusb_idtable[] = {
	{ USB_DEVICE_SYNAPTICS(TP, SYNUSB_TOUCHPAD) },
	{ USB_DEVICE_SYNAPTICS(INT_TP, SYNUSB_TOUCHPAD) },
	{ USB_DEVICE_SYNAPTICS(CPAD,
		SYNUSB_TOUCHPAD | SYNUSB_AUXDISPLAY | SYNUSB_IO_ALWAYS) },
	{ USB_DEVICE_SYNAPTICS(TS, SYNUSB_TOUCHSCREEN) },
	{ USB_DEVICE_SYNAPTICS(STICK, SYNUSB_STICK) },
	{ USB_DEVICE_SYNAPTICS(WP, SYNUSB_TOUCHPAD) },
	{ USB_DEVICE_SYNAPTICS(COMP_TP, SYNUSB_COMBO) },
	{ USB_DEVICE_SYNAPTICS(WTP, SYNUSB_TOUCHPAD) },
	{ USB_DEVICE_SYNAPTICS(DPAD, SYNUSB_TOUCHPAD) },
	{ }
};
MODULE_DEVICE_TABLE(usb, synusb_idtable);

static struct usb_driver synusb_driver = {
	.name		= "synaptics_usb",
	.probe		= synusb_probe,
	.disconnect	= synusb_disconnect,
	.id_table	= synusb_idtable,
	.suspend	= synusb_suspend,
	.resume		= synusb_resume,
	.pre_reset	= synusb_pre_reset,
	.post_reset	= synusb_post_reset,
	.reset_resume	= synusb_reset_resume,
	.supports_autosuspend = 1,
};

module_usb_driver(synusb_driver);

MODULE_AUTHOR("Rob Miller <rob@inpharmatica.co.uk>, "
              "Ron Lee <ron@debian.org>, "
              "Jan Steinhoff <cpad@jan-steinhoff.de>");
MODULE_DESCRIPTION("Synaptics USB device driver");
MODULE_LICENSE("GPL");