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41#include <linux/kernel.h>
42#include <linux/init.h>
43#include <linux/slab.h>
44#include <linux/module.h>
45#include <linux/moduleparam.h>
46#include <linux/usb.h>
47#include <linux/input.h>
48#include <linux/usb/input.h>
49
50#define USB_VENDOR_ID_SYNAPTICS 0x06cb
51#define USB_DEVICE_ID_SYNAPTICS_TP 0x0001
52#define USB_DEVICE_ID_SYNAPTICS_INT_TP 0x0002
53#define USB_DEVICE_ID_SYNAPTICS_CPAD 0x0003
54#define USB_DEVICE_ID_SYNAPTICS_TS 0x0006
55#define USB_DEVICE_ID_SYNAPTICS_STICK 0x0007
56#define USB_DEVICE_ID_SYNAPTICS_WP 0x0008
57#define USB_DEVICE_ID_SYNAPTICS_COMP_TP 0x0009
58#define USB_DEVICE_ID_SYNAPTICS_WTP 0x0010
59#define USB_DEVICE_ID_SYNAPTICS_DPAD 0x0013
60
61#define SYNUSB_TOUCHPAD (1 << 0)
62#define SYNUSB_STICK (1 << 1)
63#define SYNUSB_TOUCHSCREEN (1 << 2)
64#define SYNUSB_AUXDISPLAY (1 << 3)
65#define SYNUSB_COMBO (1 << 4)
66#define SYNUSB_IO_ALWAYS (1 << 5)
67
68#define USB_DEVICE_SYNAPTICS(prod, kind) \
69 USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, \
70 USB_DEVICE_ID_SYNAPTICS_##prod), \
71 .driver_info = (kind),
72
73#define SYNUSB_RECV_SIZE 8
74
75#define XMIN_NOMINAL 1472
76#define XMAX_NOMINAL 5472
77#define YMIN_NOMINAL 1408
78#define YMAX_NOMINAL 4448
79
80struct synusb {
81 struct usb_device *udev;
82 struct usb_interface *intf;
83 struct urb *urb;
84 unsigned char *data;
85
86
87 struct input_dev *input;
88 char name[128];
89 char phys[64];
90
91
92 unsigned long flags;
93};
94
95static void synusb_report_buttons(struct synusb *synusb)
96{
97 struct input_dev *input_dev = synusb->input;
98
99 input_report_key(input_dev, BTN_LEFT, synusb->data[1] & 0x04);
100 input_report_key(input_dev, BTN_RIGHT, synusb->data[1] & 0x01);
101 input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x02);
102}
103
104static void synusb_report_stick(struct synusb *synusb)
105{
106 struct input_dev *input_dev = synusb->input;
107 int x, y;
108 unsigned int pressure;
109
110 pressure = synusb->data[6];
111 x = (s16)(be16_to_cpup((__be16 *)&synusb->data[2]) << 3) >> 7;
112 y = (s16)(be16_to_cpup((__be16 *)&synusb->data[4]) << 3) >> 7;
113
114 if (pressure > 0) {
115 input_report_rel(input_dev, REL_X, x);
116 input_report_rel(input_dev, REL_Y, -y);
117 }
118
119 input_report_abs(input_dev, ABS_PRESSURE, pressure);
120
121 synusb_report_buttons(synusb);
122
123 input_sync(input_dev);
124}
125
126static void synusb_report_touchpad(struct synusb *synusb)
127{
128 struct input_dev *input_dev = synusb->input;
129 unsigned int num_fingers, tool_width;
130 unsigned int x, y;
131 unsigned int pressure, w;
132
133 pressure = synusb->data[6];
134 x = be16_to_cpup((__be16 *)&synusb->data[2]);
135 y = be16_to_cpup((__be16 *)&synusb->data[4]);
136 w = synusb->data[0] & 0x0f;
137
138 if (pressure > 0) {
139 num_fingers = 1;
140 tool_width = 5;
141 switch (w) {
142 case 0 ... 1:
143 num_fingers = 2 + w;
144 break;
145
146 case 2:
147 break;
148
149 case 4 ... 15:
150 tool_width = w;
151 break;
152 }
153 } else {
154 num_fingers = 0;
155 tool_width = 0;
156 }
157
158
159
160
161
162
163
164 if (pressure > 30)
165 input_report_key(input_dev, BTN_TOUCH, 1);
166 if (pressure < 25)
167 input_report_key(input_dev, BTN_TOUCH, 0);
168
169 if (num_fingers > 0) {
170 input_report_abs(input_dev, ABS_X, x);
171 input_report_abs(input_dev, ABS_Y,
172 YMAX_NOMINAL + YMIN_NOMINAL - y);
173 }
174
175 input_report_abs(input_dev, ABS_PRESSURE, pressure);
176 input_report_abs(input_dev, ABS_TOOL_WIDTH, tool_width);
177
178 input_report_key(input_dev, BTN_TOOL_FINGER, num_fingers == 1);
179 input_report_key(input_dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
180 input_report_key(input_dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
181
182 synusb_report_buttons(synusb);
183 if (synusb->flags & SYNUSB_AUXDISPLAY)
184 input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x08);
185
186 input_sync(input_dev);
187}
188
189static void synusb_irq(struct urb *urb)
190{
191 struct synusb *synusb = urb->context;
192 int error;
193
194
195 switch (urb->status) {
196 case 0:
197 usb_mark_last_busy(synusb->udev);
198 break;
199
200
201 case -ECONNRESET:
202 case -ENOENT:
203 case -ESHUTDOWN:
204 return;
205
206 default:
207 goto resubmit;
208 break;
209 }
210
211 if (synusb->flags & SYNUSB_STICK)
212 synusb_report_stick(synusb);
213 else
214 synusb_report_touchpad(synusb);
215
216resubmit:
217 error = usb_submit_urb(urb, GFP_ATOMIC);
218 if (error && error != -EPERM)
219 dev_err(&synusb->intf->dev,
220 "%s - usb_submit_urb failed with result: %d",
221 __func__, error);
222}
223
224static struct usb_endpoint_descriptor *
225synusb_get_in_endpoint(struct usb_host_interface *iface)
226{
227
228 struct usb_endpoint_descriptor *endpoint;
229 int i;
230
231 for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
232 endpoint = &iface->endpoint[i].desc;
233
234 if (usb_endpoint_is_int_in(endpoint)) {
235
236 return endpoint;
237 }
238 }
239
240 return NULL;
241}
242
243static int synusb_open(struct input_dev *dev)
244{
245 struct synusb *synusb = input_get_drvdata(dev);
246 int retval;
247
248 retval = usb_autopm_get_interface(synusb->intf);
249 if (retval) {
250 dev_err(&synusb->intf->dev,
251 "%s - usb_autopm_get_interface failed, error: %d\n",
252 __func__, retval);
253 return retval;
254 }
255
256 retval = usb_submit_urb(synusb->urb, GFP_KERNEL);
257 if (retval) {
258 dev_err(&synusb->intf->dev,
259 "%s - usb_submit_urb failed, error: %d\n",
260 __func__, retval);
261 retval = -EIO;
262 goto out;
263 }
264
265 synusb->intf->needs_remote_wakeup = 1;
266
267out:
268 usb_autopm_put_interface(synusb->intf);
269 return retval;
270}
271
272static void synusb_close(struct input_dev *dev)
273{
274 struct synusb *synusb = input_get_drvdata(dev);
275 int autopm_error;
276
277 autopm_error = usb_autopm_get_interface(synusb->intf);
278
279 usb_kill_urb(synusb->urb);
280 synusb->intf->needs_remote_wakeup = 0;
281
282 if (!autopm_error)
283 usb_autopm_put_interface(synusb->intf);
284}
285
286static int synusb_probe(struct usb_interface *intf,
287 const struct usb_device_id *id)
288{
289 struct usb_device *udev = interface_to_usbdev(intf);
290 struct usb_endpoint_descriptor *ep;
291 struct synusb *synusb;
292 struct input_dev *input_dev;
293 unsigned int intf_num = intf->cur_altsetting->desc.bInterfaceNumber;
294 unsigned int altsetting = min(intf->num_altsetting, 1U);
295 int error;
296
297 error = usb_set_interface(udev, intf_num, altsetting);
298 if (error) {
299 dev_err(&udev->dev,
300 "Can not set alternate setting to %i, error: %i",
301 altsetting, error);
302 return error;
303 }
304
305 ep = synusb_get_in_endpoint(intf->cur_altsetting);
306 if (!ep)
307 return -ENODEV;
308
309 synusb = kzalloc(sizeof(*synusb), GFP_KERNEL);
310 input_dev = input_allocate_device();
311 if (!synusb || !input_dev) {
312 error = -ENOMEM;
313 goto err_free_mem;
314 }
315
316 synusb->udev = udev;
317 synusb->intf = intf;
318 synusb->input = input_dev;
319
320 synusb->flags = id->driver_info;
321 if (synusb->flags & SYNUSB_COMBO) {
322
323
324
325
326 synusb->flags |= intf_num == 1 ?
327 SYNUSB_STICK : SYNUSB_TOUCHPAD;
328 }
329
330 synusb->urb = usb_alloc_urb(0, GFP_KERNEL);
331 if (!synusb->urb) {
332 error = -ENOMEM;
333 goto err_free_mem;
334 }
335
336 synusb->data = usb_alloc_coherent(udev, SYNUSB_RECV_SIZE, GFP_KERNEL,
337 &synusb->urb->transfer_dma);
338 if (!synusb->data) {
339 error = -ENOMEM;
340 goto err_free_urb;
341 }
342
343 usb_fill_int_urb(synusb->urb, udev,
344 usb_rcvintpipe(udev, ep->bEndpointAddress),
345 synusb->data, SYNUSB_RECV_SIZE,
346 synusb_irq, synusb,
347 ep->bInterval);
348 synusb->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
349
350 if (udev->manufacturer)
351 strlcpy(synusb->name, udev->manufacturer,
352 sizeof(synusb->name));
353
354 if (udev->product) {
355 if (udev->manufacturer)
356 strlcat(synusb->name, " ", sizeof(synusb->name));
357 strlcat(synusb->name, udev->product, sizeof(synusb->name));
358 }
359
360 if (!strlen(synusb->name))
361 snprintf(synusb->name, sizeof(synusb->name),
362 "USB Synaptics Device %04x:%04x",
363 le16_to_cpu(udev->descriptor.idVendor),
364 le16_to_cpu(udev->descriptor.idProduct));
365
366 if (synusb->flags & SYNUSB_STICK)
367 strlcat(synusb->name, " (Stick)", sizeof(synusb->name));
368
369 usb_make_path(udev, synusb->phys, sizeof(synusb->phys));
370 strlcat(synusb->phys, "/input0", sizeof(synusb->phys));
371
372 input_dev->name = synusb->name;
373 input_dev->phys = synusb->phys;
374 usb_to_input_id(udev, &input_dev->id);
375 input_dev->dev.parent = &synusb->intf->dev;
376
377 if (!(synusb->flags & SYNUSB_IO_ALWAYS)) {
378 input_dev->open = synusb_open;
379 input_dev->close = synusb_close;
380 }
381
382 input_set_drvdata(input_dev, synusb);
383
384 __set_bit(EV_ABS, input_dev->evbit);
385 __set_bit(EV_KEY, input_dev->evbit);
386
387 if (synusb->flags & SYNUSB_STICK) {
388 __set_bit(EV_REL, input_dev->evbit);
389 __set_bit(REL_X, input_dev->relbit);
390 __set_bit(REL_Y, input_dev->relbit);
391 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 127, 0, 0);
392 } else {
393 input_set_abs_params(input_dev, ABS_X,
394 XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
395 input_set_abs_params(input_dev, ABS_Y,
396 YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
397 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
398 input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
399 __set_bit(BTN_TOUCH, input_dev->keybit);
400 __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
401 __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
402 __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
403 }
404
405 __set_bit(BTN_LEFT, input_dev->keybit);
406 __set_bit(BTN_RIGHT, input_dev->keybit);
407 __set_bit(BTN_MIDDLE, input_dev->keybit);
408
409 usb_set_intfdata(intf, synusb);
410
411 if (synusb->flags & SYNUSB_IO_ALWAYS) {
412 error = synusb_open(input_dev);
413 if (error)
414 goto err_free_dma;
415 }
416
417 error = input_register_device(input_dev);
418 if (error) {
419 dev_err(&udev->dev,
420 "Failed to register input device, error %d\n",
421 error);
422 goto err_stop_io;
423 }
424
425 return 0;
426
427err_stop_io:
428 if (synusb->flags & SYNUSB_IO_ALWAYS)
429 synusb_close(synusb->input);
430err_free_dma:
431 usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
432 synusb->urb->transfer_dma);
433err_free_urb:
434 usb_free_urb(synusb->urb);
435err_free_mem:
436 input_free_device(input_dev);
437 kfree(synusb);
438 usb_set_intfdata(intf, NULL);
439
440 return error;
441}
442
443static void synusb_disconnect(struct usb_interface *intf)
444{
445 struct synusb *synusb = usb_get_intfdata(intf);
446 struct usb_device *udev = interface_to_usbdev(intf);
447
448 if (synusb->flags & SYNUSB_IO_ALWAYS)
449 synusb_close(synusb->input);
450
451 input_unregister_device(synusb->input);
452
453 usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
454 synusb->urb->transfer_dma);
455 usb_free_urb(synusb->urb);
456 kfree(synusb);
457
458 usb_set_intfdata(intf, NULL);
459}
460
461static int synusb_suspend(struct usb_interface *intf, pm_message_t message)
462{
463 struct synusb *synusb = usb_get_intfdata(intf);
464 struct input_dev *input_dev = synusb->input;
465
466 mutex_lock(&input_dev->mutex);
467 usb_kill_urb(synusb->urb);
468 mutex_unlock(&input_dev->mutex);
469
470 return 0;
471}
472
473static int synusb_resume(struct usb_interface *intf)
474{
475 struct synusb *synusb = usb_get_intfdata(intf);
476 struct input_dev *input_dev = synusb->input;
477 int retval = 0;
478
479 mutex_lock(&input_dev->mutex);
480
481 if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
482 usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
483 retval = -EIO;
484 }
485
486 mutex_unlock(&input_dev->mutex);
487
488 return retval;
489}
490
491static int synusb_pre_reset(struct usb_interface *intf)
492{
493 struct synusb *synusb = usb_get_intfdata(intf);
494 struct input_dev *input_dev = synusb->input;
495
496 mutex_lock(&input_dev->mutex);
497 usb_kill_urb(synusb->urb);
498
499 return 0;
500}
501
502static int synusb_post_reset(struct usb_interface *intf)
503{
504 struct synusb *synusb = usb_get_intfdata(intf);
505 struct input_dev *input_dev = synusb->input;
506 int retval = 0;
507
508 if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
509 usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
510 retval = -EIO;
511 }
512
513 mutex_unlock(&input_dev->mutex);
514
515 return retval;
516}
517
518static int synusb_reset_resume(struct usb_interface *intf)
519{
520 return synusb_resume(intf);
521}
522
523static struct usb_device_id synusb_idtable[] = {
524 { USB_DEVICE_SYNAPTICS(TP, SYNUSB_TOUCHPAD) },
525 { USB_DEVICE_SYNAPTICS(INT_TP, SYNUSB_TOUCHPAD) },
526 { USB_DEVICE_SYNAPTICS(CPAD,
527 SYNUSB_TOUCHPAD | SYNUSB_AUXDISPLAY | SYNUSB_IO_ALWAYS) },
528 { USB_DEVICE_SYNAPTICS(TS, SYNUSB_TOUCHSCREEN) },
529 { USB_DEVICE_SYNAPTICS(STICK, SYNUSB_STICK) },
530 { USB_DEVICE_SYNAPTICS(WP, SYNUSB_TOUCHPAD) },
531 { USB_DEVICE_SYNAPTICS(COMP_TP, SYNUSB_COMBO) },
532 { USB_DEVICE_SYNAPTICS(WTP, SYNUSB_TOUCHPAD) },
533 { USB_DEVICE_SYNAPTICS(DPAD, SYNUSB_TOUCHPAD) },
534 { }
535};
536MODULE_DEVICE_TABLE(usb, synusb_idtable);
537
538static struct usb_driver synusb_driver = {
539 .name = "synaptics_usb",
540 .probe = synusb_probe,
541 .disconnect = synusb_disconnect,
542 .id_table = synusb_idtable,
543 .suspend = synusb_suspend,
544 .resume = synusb_resume,
545 .pre_reset = synusb_pre_reset,
546 .post_reset = synusb_post_reset,
547 .reset_resume = synusb_reset_resume,
548 .supports_autosuspend = 1,
549};
550
551module_usb_driver(synusb_driver);
552
553MODULE_AUTHOR("Rob Miller <rob@inpharmatica.co.uk>, "
554 "Ron Lee <ron@debian.org>, "
555 "Jan Steinhoff <cpad@jan-steinhoff.de>");
556MODULE_DESCRIPTION("Synaptics USB device driver");
557MODULE_LICENSE("GPL");
558
