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Input: replace remaining __FUNCTION__ occurrences
[linux-2.6.git] / drivers / input / mouse / appletouch.c
blob32c29400f87246cf86edcd674aca2581ebf27774
1 /*
2 * Apple USB Touchpad (for post-February 2005 PowerBooks and MacBooks) driver
3 *
4 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
5 * Copyright (C) 2005 Johannes Berg (johannes@sipsolutions.net)
6 * Copyright (C) 2005 Stelian Pop (stelian@popies.net)
7 * Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de)
8 * Copyright (C) 2005 Peter Osterlund (petero2@telia.com)
9 * Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch)
10 * Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch)
11 *
12 * Thanks to Alex Harper <basilisk@foobox.net> for his inputs.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 */
29
30 #include <linux/kernel.h>
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/slab.h>
34 #include <linux/module.h>
35 #include <linux/usb/input.h>
36
37 /* Apple has powerbooks which have the keyboard with different Product IDs */
38 #define APPLE_VENDOR_ID 0x05AC
39
40 /* These names come from Info.plist in AppleUSBTrackpad.kext */
41 #define FOUNTAIN_ANSI_PRODUCT_ID 0x020E
42 #define FOUNTAIN_ISO_PRODUCT_ID 0x020F
43
44 #define FOUNTAIN_TP_ONLY_PRODUCT_ID 0x030A
45
46 #define GEYSER1_TP_ONLY_PRODUCT_ID 0x030B
47
48 #define GEYSER_ANSI_PRODUCT_ID 0x0214
49 #define GEYSER_ISO_PRODUCT_ID 0x0215
50 #define GEYSER_JIS_PRODUCT_ID 0x0216
51
52 /* MacBook devices */
53 #define GEYSER3_ANSI_PRODUCT_ID 0x0217
54 #define GEYSER3_ISO_PRODUCT_ID 0x0218
55 #define GEYSER3_JIS_PRODUCT_ID 0x0219
56
57 /*
58 * Geyser IV: same as Geyser III according to Info.plist in AppleUSBTrackpad.kext
59 * -> same IOClass (AppleUSBGrIIITrackpad), same acceleration tables
60 */
61 #define GEYSER4_ANSI_PRODUCT_ID 0x021A
62 #define GEYSER4_ISO_PRODUCT_ID 0x021B
63 #define GEYSER4_JIS_PRODUCT_ID 0x021C
64
65 #define GEYSER4_HF_ANSI_PRODUCT_ID 0x0229
66 #define GEYSER4_HF_ISO_PRODUCT_ID 0x022A
67 #define GEYSER4_HF_JIS_PRODUCT_ID 0x022B
68
69 #define ATP_DEVICE(prod) \
70 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
71 USB_DEVICE_ID_MATCH_INT_CLASS | \
72 USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
73 .idVendor = APPLE_VENDOR_ID, \
74 .idProduct = (prod), \
75 .bInterfaceClass = 0x03, \
76 .bInterfaceProtocol = 0x02
77
78 /* table of devices that work with this driver */
79 static struct usb_device_id atp_table [] = {
80 { ATP_DEVICE(FOUNTAIN_ANSI_PRODUCT_ID) },
81 { ATP_DEVICE(FOUNTAIN_ISO_PRODUCT_ID) },
82 { ATP_DEVICE(FOUNTAIN_TP_ONLY_PRODUCT_ID) },
83 { ATP_DEVICE(GEYSER1_TP_ONLY_PRODUCT_ID) },
84
85 /* PowerBooks Oct 2005 */
86 { ATP_DEVICE(GEYSER_ANSI_PRODUCT_ID) },
87 { ATP_DEVICE(GEYSER_ISO_PRODUCT_ID) },
88 { ATP_DEVICE(GEYSER_JIS_PRODUCT_ID) },
89
90 /* Core Duo MacBook & MacBook Pro */
91 { ATP_DEVICE(GEYSER3_ANSI_PRODUCT_ID) },
92 { ATP_DEVICE(GEYSER3_ISO_PRODUCT_ID) },
93 { ATP_DEVICE(GEYSER3_JIS_PRODUCT_ID) },
94
95 /* Core2 Duo MacBook & MacBook Pro */
96 { ATP_DEVICE(GEYSER4_ANSI_PRODUCT_ID) },
97 { ATP_DEVICE(GEYSER4_ISO_PRODUCT_ID) },
98 { ATP_DEVICE(GEYSER4_JIS_PRODUCT_ID) },
99
100 { ATP_DEVICE(GEYSER4_HF_ANSI_PRODUCT_ID) },
101 { ATP_DEVICE(GEYSER4_HF_ISO_PRODUCT_ID) },
102 { ATP_DEVICE(GEYSER4_HF_JIS_PRODUCT_ID) },
103
104 /* Terminating entry */
105 { }
106 };
107 MODULE_DEVICE_TABLE (usb, atp_table);
108
109 /*
110 * number of sensors. Note that only 16 instead of 26 X (horizontal)
111 * sensors exist on 12" and 15" PowerBooks. All models have 16 Y
112 * (vertical) sensors.
113 */
114 #define ATP_XSENSORS 26
115 #define ATP_YSENSORS 16
116
117 /* amount of fuzz this touchpad generates */
118 #define ATP_FUZZ 16
119
120 /* maximum pressure this driver will report */
121 #define ATP_PRESSURE 300
122 /*
123 * multiplication factor for the X and Y coordinates.
124 * We try to keep the touchpad aspect ratio while still doing only simple
125 * arithmetics.
126 * The factors below give coordinates like:
127 * 0 <= x < 960 on 12" and 15" Powerbooks
128 * 0 <= x < 1600 on 17" Powerbooks
129 * 0 <= y < 646
130 */
131 #define ATP_XFACT 64
132 #define ATP_YFACT 43
133
134 /*
135 * Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
136 * ignored.
137 */
138 #define ATP_THRESHOLD 5
139
140 /* Geyser initialization constants */
141 #define ATP_GEYSER_MODE_READ_REQUEST_ID 1
142 #define ATP_GEYSER_MODE_WRITE_REQUEST_ID 9
143 #define ATP_GEYSER_MODE_REQUEST_VALUE 0x300
144 #define ATP_GEYSER_MODE_REQUEST_INDEX 0
145 #define ATP_GEYSER_MODE_VENDOR_VALUE 0x04
146
147 /* Structure to hold all of our device specific stuff */
148 struct atp {
149 char phys[64];
150 struct usb_device * udev; /* usb device */
151 struct urb * urb; /* usb request block */
152 signed char * data; /* transferred data */
153 struct input_dev * input; /* input dev */
154 unsigned char open; /* non-zero if opened */
155 unsigned char valid; /* are the sensors valid ? */
156 unsigned char size_detect_done;
157 unsigned char overflowwarn; /* overflow warning printed? */
158 int x_old; /* last reported x/y, */
159 int y_old; /* used for smoothing */
160 /* current value of the sensors */
161 signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
162 /* last value of the sensors */
163 signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
164 /* accumulated sensors */
165 int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
166 int datalen; /* size of an USB urb transfer */
167 int idlecount; /* number of empty packets */
168 struct work_struct work;
169 };
170
171 #define dbg_dump(msg, tab) \
172 if (debug > 1) { \
173 int i; \
174 printk("appletouch: %s %lld", msg, (long long)jiffies); \
175 for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) \
176 printk(" %02x", tab[i]); \
177 printk("\n"); \
178 }
179
180 #define dprintk(format, a...) \
181 do { \
182 if (debug) printk(KERN_DEBUG format, ##a); \
183 } while (0)
184
185 MODULE_AUTHOR("Johannes Berg, Stelian Pop, Frank Arnold, Michael Hanselmann");
186 MODULE_DESCRIPTION("Apple PowerBooks USB touchpad driver");
187 MODULE_LICENSE("GPL");
188
189 /*
190 * Make the threshold a module parameter
191 */
192 static int threshold = ATP_THRESHOLD;
193 module_param(threshold, int, 0644);
194 MODULE_PARM_DESC(threshold, "Discards any change in data from a sensor (trackpad has hundreds of these sensors) less than this value");
195
196 static int debug = 1;
197 module_param(debug, int, 0644);
198 MODULE_PARM_DESC(debug, "Activate debugging output");
199
200 static inline int atp_is_fountain(struct atp *dev)
201 {
202 u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
203
204 return productId == FOUNTAIN_ANSI_PRODUCT_ID ||
205 productId == FOUNTAIN_ISO_PRODUCT_ID ||
206 productId == FOUNTAIN_TP_ONLY_PRODUCT_ID;
207 }
208
209 /* Checks if the device a Geyser 2 (ANSI, ISO, JIS) */
210 static inline int atp_is_geyser_2(struct atp *dev)
211 {
212 u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
213
214 return (productId == GEYSER_ANSI_PRODUCT_ID) ||
215 (productId == GEYSER_ISO_PRODUCT_ID) ||
216 (productId == GEYSER_JIS_PRODUCT_ID);
217 }
218
219 static inline int atp_is_geyser_3(struct atp *dev)
220 {
221 u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
222
223 return (productId == GEYSER3_ANSI_PRODUCT_ID) ||
224 (productId == GEYSER3_ISO_PRODUCT_ID) ||
225 (productId == GEYSER3_JIS_PRODUCT_ID) ||
226 (productId == GEYSER4_ANSI_PRODUCT_ID) ||
227 (productId == GEYSER4_ISO_PRODUCT_ID) ||
228 (productId == GEYSER4_JIS_PRODUCT_ID) ||
229 (productId == GEYSER4_HF_ANSI_PRODUCT_ID) ||
230 (productId == GEYSER4_HF_ISO_PRODUCT_ID) ||
231 (productId == GEYSER4_HF_JIS_PRODUCT_ID);
232 }
233
234 /*
235 * By default newer Geyser devices send standard USB HID mouse
236 * packets (Report ID 2). This code changes device mode, so it
237 * sends raw sensor reports (Report ID 5).
238 */
239 static int atp_geyser_init(struct usb_device *udev)
240 {
241 char data[8];
242 int size;
243
244 size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
245 ATP_GEYSER_MODE_READ_REQUEST_ID,
246 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
247 ATP_GEYSER_MODE_REQUEST_VALUE,
248 ATP_GEYSER_MODE_REQUEST_INDEX, &data, 8, 5000);
249
250 if (size != 8) {
251 err("Could not do mode read request from device"
252 " (Geyser Raw mode)");
253 return -EIO;
254 }
255
256 /* Apply the mode switch */
257 data[0] = ATP_GEYSER_MODE_VENDOR_VALUE;
258
259 size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
260 ATP_GEYSER_MODE_WRITE_REQUEST_ID,
261 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
262 ATP_GEYSER_MODE_REQUEST_VALUE,
263 ATP_GEYSER_MODE_REQUEST_INDEX, &data, 8, 5000);
264
265 if (size != 8) {
266 err("Could not do mode write request to device"
267 " (Geyser Raw mode)");
268 return -EIO;
269 }
270 return 0;
271 }
272
273 /*
274 * Reinitialise the device. This usually stops stream of empty packets
275 * coming from it.
276 */
277 static void atp_reinit(struct work_struct *work)
278 {
279 struct atp *dev = container_of(work, struct atp, work);
280 struct usb_device *udev = dev->udev;
281 int retval;
282
283 dev->idlecount = 0;
284
285 atp_geyser_init(udev);
286
287 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
288 if (retval) {
289 err("%s - usb_submit_urb failed with result %d",
290 __func__, retval);
291 }
292 }
293
294 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
295 int *z, int *fingers)
296 {
297 int i;
298 /* values to calculate mean */
299 int pcum = 0, psum = 0;
300 int is_increasing = 0;
301
302 *fingers = 0;
303
304 for (i = 0; i < nb_sensors; i++) {
305 if (xy_sensors[i] < threshold) {
306 if (is_increasing)
307 is_increasing = 0;
308
309 continue;
310 }
311
312 /*
313 * Makes the finger detection more versatile. For example,
314 * two fingers with no gap will be detected. Also, my
315 * tests show it less likely to have intermittent loss
316 * of multiple finger readings while moving around (scrolling).
317 *
318 * Changes the multiple finger detection to counting humps on
319 * sensors (transitions from nonincreasing to increasing)
320 * instead of counting transitions from low sensors (no
321 * finger reading) to high sensors (finger above
322 * sensor)
323 *
324 * - Jason Parekh <jasonparekh@gmail.com>
325 */
326 if (i < 1 || (!is_increasing && xy_sensors[i - 1] < xy_sensors[i])) {
327 (*fingers)++;
328 is_increasing = 1;
329 } else if (i > 0 && xy_sensors[i - 1] >= xy_sensors[i]) {
330 is_increasing = 0;
331 }
332
333 /*
334 * Subtracts threshold so a high sensor that just passes the threshold
335 * won't skew the calculated absolute coordinate. Fixes an issue
336 * where slowly moving the mouse would occassionaly jump a number of
337 * pixels (let me restate--slowly moving the mouse makes this issue
338 * most apparent).
339 */
340 pcum += (xy_sensors[i] - threshold) * i;
341 psum += (xy_sensors[i] - threshold);
342 }
343
344 if (psum > 0) {
345 *z = psum;
346 return pcum * fact / psum;
347 }
348
349 return 0;
350 }
351
352 static inline void atp_report_fingers(struct input_dev *input, int fingers)
353 {
354 input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
355 input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
356 input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
357 }
358
359 static void atp_complete(struct urb* urb)
360 {
361 int x, y, x_z, y_z, x_f, y_f;
362 int retval, i, j;
363 int key;
364 struct atp *dev = urb->context;
365
366 switch (urb->status) {
367 case 0:
368 /* success */
369 break;
370 case -EOVERFLOW:
371 if(!dev->overflowwarn) {
372 printk(KERN_WARNING "appletouch: OVERFLOW with data "
373 "length %d, actual length is %d\n",
374 dev->datalen, dev->urb->actual_length);
375 dev->overflowwarn = 1;
376 }
377 case -ECONNRESET:
378 case -ENOENT:
379 case -ESHUTDOWN:
380 /* This urb is terminated, clean up */
381 dbg("%s - urb shutting down with status: %d",
382 __func__, urb->status);
383 return;
384 default:
385 dbg("%s - nonzero urb status received: %d",
386 __func__, urb->status);
387 goto exit;
388 }
389
390 /* drop incomplete datasets */
391 if (dev->urb->actual_length != dev->datalen) {
392 dprintk("appletouch: incomplete data package"
393 " (first byte: %d, length: %d).\n",
394 dev->data[0], dev->urb->actual_length);
395 goto exit;
396 }
397
398 /* reorder the sensors values */
399 if (atp_is_geyser_3(dev)) {
400 memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
401
402 /*
403 * The values are laid out like this:
404 * -, Y1, Y2, -, Y3, Y4, -, ..., -, X1, X2, -, X3, X4, ...
405 * '-' is an unused value.
406 */
407
408 /* read X values */
409 for (i = 0, j = 19; i < 20; i += 2, j += 3) {
410 dev->xy_cur[i] = dev->data[j + 1];
411 dev->xy_cur[i + 1] = dev->data[j + 2];
412 }
413 /* read Y values */
414 for (i = 0, j = 1; i < 9; i += 2, j += 3) {
415 dev->xy_cur[ATP_XSENSORS + i] = dev->data[j + 1];
416 dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 2];
417 }
418 } else if (atp_is_geyser_2(dev)) {
419 memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
420
421 /*
422 * The values are laid out like this:
423 * Y1, Y2, -, Y3, Y4, -, ..., X1, X2, -, X3, X4, -, ...
424 * '-' is an unused value.
425 */
426
427 /* read X values */
428 for (i = 0, j = 19; i < 20; i += 2, j += 3) {
429 dev->xy_cur[i] = dev->data[j];
430 dev->xy_cur[i + 1] = dev->data[j + 1];
431 }
432
433 /* read Y values */
434 for (i = 0, j = 1; i < 9; i += 2, j += 3) {
435 dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
436 dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
437 }
438 } else {
439 for (i = 0; i < 8; i++) {
440 /* X values */
441 dev->xy_cur[i ] = dev->data[5 * i + 2];
442 dev->xy_cur[i + 8] = dev->data[5 * i + 4];
443 dev->xy_cur[i + 16] = dev->data[5 * i + 42];
444 if (i < 2)
445 dev->xy_cur[i + 24] = dev->data[5 * i + 44];
446
447 /* Y values */
448 dev->xy_cur[i + 26] = dev->data[5 * i + 1];
449 dev->xy_cur[i + 34] = dev->data[5 * i + 3];
450 }
451 }
452
453 dbg_dump("sample", dev->xy_cur);
454
455 if (!dev->valid) {
456 /* first sample */
457 dev->valid = 1;
458 dev->x_old = dev->y_old = -1;
459 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
460
461 if (dev->size_detect_done ||
462 atp_is_geyser_3(dev)) /* No 17" Macbooks (yet) */
463 goto exit;
464
465 /* 17" Powerbooks have extra X sensors */
466 for (i = (atp_is_geyser_2(dev) ? 15 : 16); i < ATP_XSENSORS; i++) {
467 if (!dev->xy_cur[i])
468 continue;
469
470 printk(KERN_INFO "appletouch: 17\" model detected.\n");
471 if (atp_is_geyser_2(dev))
472 input_set_abs_params(dev->input, ABS_X, 0,
473 (20 - 1) *
474 ATP_XFACT - 1,
475 ATP_FUZZ, 0);
476 else
477 input_set_abs_params(dev->input, ABS_X, 0,
478 (ATP_XSENSORS - 1) *
479 ATP_XFACT - 1,
480 ATP_FUZZ, 0);
481 break;
482 }
483
484 dev->size_detect_done = 1;
485 goto exit;
486 }
487
488 for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
489 /* accumulate the change */
490 signed char change = dev->xy_old[i] - dev->xy_cur[i];
491 dev->xy_acc[i] -= change;
492
493 /* prevent down drifting */
494 if (dev->xy_acc[i] < 0)
495 dev->xy_acc[i] = 0;
496 }
497
498 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
499
500 dbg_dump("accumulator", dev->xy_acc);
501
502 x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
503 ATP_XFACT, &x_z, &x_f);
504 y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
505 ATP_YFACT, &y_z, &y_f);
506 key = dev->data[dev->datalen - 1] & 1;
507
508 if (x && y) {
509 if (dev->x_old != -1) {
510 x = (dev->x_old * 3 + x) >> 2;
511 y = (dev->y_old * 3 + y) >> 2;
512 dev->x_old = x;
513 dev->y_old = y;
514
515 if (debug > 1)
516 printk(KERN_DEBUG "appletouch: X: %3d Y: %3d "
517 "Xz: %3d Yz: %3d\n",
518 x, y, x_z, y_z);
519
520 input_report_key(dev->input, BTN_TOUCH, 1);
521 input_report_abs(dev->input, ABS_X, x);
522 input_report_abs(dev->input, ABS_Y, y);
523 input_report_abs(dev->input, ABS_PRESSURE,
524 min(ATP_PRESSURE, x_z + y_z));
525 atp_report_fingers(dev->input, max(x_f, y_f));
526 }
527 dev->x_old = x;
528 dev->y_old = y;
529
530 } else if (!x && !y) {
531
532 dev->x_old = dev->y_old = -1;
533 input_report_key(dev->input, BTN_TOUCH, 0);
534 input_report_abs(dev->input, ABS_PRESSURE, 0);
535 atp_report_fingers(dev->input, 0);
536
537 /* reset the accumulator on release */
538 memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
539 }
540
541 input_report_key(dev->input, BTN_LEFT, key);
542 input_sync(dev->input);
543
544 /*
545 * Many Geysers will continue to send packets continually after
546 * the first touch unless reinitialised. Do so if it's been
547 * idle for a while in order to avoid waking the kernel up
548 * several hundred times a second. Re-initialization does not
549 * work on Fountain touchpads.
550 */
551 if (!atp_is_fountain(dev)) {
552 if (!x && !y && !key) {
553 dev->idlecount++;
554 if (dev->idlecount == 10) {
555 dev->valid = 0;
556 schedule_work(&dev->work);
557 /* Don't resubmit urb here, wait for reinit */
558 return;
559 }
560 } else
561 dev->idlecount = 0;
562 }
563
564 exit:
565 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
566 if (retval) {
567 err("%s - usb_submit_urb failed with result %d",
568 __func__, retval);
569 }
570 }
571
572 static int atp_open(struct input_dev *input)
573 {
574 struct atp *dev = input_get_drvdata(input);
575
576 if (usb_submit_urb(dev->urb, GFP_ATOMIC))
577 return -EIO;
578
579 dev->open = 1;
580 return 0;
581 }
582
583 static void atp_close(struct input_dev *input)
584 {
585 struct atp *dev = input_get_drvdata(input);
586
587 usb_kill_urb(dev->urb);
588 cancel_work_sync(&dev->work);
589 dev->open = 0;
590 }
591
592 static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id)
593 {
594 struct atp *dev;
595 struct input_dev *input_dev;
596 struct usb_device *udev = interface_to_usbdev(iface);
597 struct usb_host_interface *iface_desc;
598 struct usb_endpoint_descriptor *endpoint;
599 int int_in_endpointAddr = 0;
600 int i, error = -ENOMEM;
601
602 /* set up the endpoint information */
603 /* use only the first interrupt-in endpoint */
604 iface_desc = iface->cur_altsetting;
605 for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
606 endpoint = &iface_desc->endpoint[i].desc;
607 if (!int_in_endpointAddr && usb_endpoint_is_int_in(endpoint)) {
608 /* we found an interrupt in endpoint */
609 int_in_endpointAddr = endpoint->bEndpointAddress;
610 break;
611 }
612 }
613 if (!int_in_endpointAddr) {
614 err("Could not find int-in endpoint");
615 return -EIO;
616 }
617
618 /* allocate memory for our device state and initialize it */
619 dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
620 input_dev = input_allocate_device();
621 if (!dev || !input_dev) {
622 err("Out of memory");
623 goto err_free_devs;
624 }
625
626 dev->udev = udev;
627 dev->input = input_dev;
628 dev->overflowwarn = 0;
629 if (atp_is_geyser_3(dev))
630 dev->datalen = 64;
631 else if (atp_is_geyser_2(dev))
632 dev->datalen = 64;
633 else
634 dev->datalen = 81;
635
636 if (!atp_is_fountain(dev)) {
637 /* switch to raw sensor mode */
638 if (atp_geyser_init(udev))
639 goto err_free_devs;
640
641 printk(KERN_INFO "appletouch: Geyser mode initialized.\n");
642 }
643
644 dev->urb = usb_alloc_urb(0, GFP_KERNEL);
645 if (!dev->urb)
646 goto err_free_devs;
647
648 dev->data = usb_buffer_alloc(dev->udev, dev->datalen, GFP_KERNEL,
649 &dev->urb->transfer_dma);
650 if (!dev->data)
651 goto err_free_urb;
652
653 usb_fill_int_urb(dev->urb, udev,
654 usb_rcvintpipe(udev, int_in_endpointAddr),
655 dev->data, dev->datalen, atp_complete, dev, 1);
656
657 usb_make_path(udev, dev->phys, sizeof(dev->phys));
658 strlcat(dev->phys, "/input0", sizeof(dev->phys));
659
660 input_dev->name = "appletouch";
661 input_dev->phys = dev->phys;
662 usb_to_input_id(dev->udev, &input_dev->id);
663 input_dev->dev.parent = &iface->dev;
664
665 input_set_drvdata(input_dev, dev);
666
667 input_dev->open = atp_open;
668 input_dev->close = atp_close;
669
670 set_bit(EV_ABS, input_dev->evbit);
671
672 if (atp_is_geyser_3(dev)) {
673 /*
674 * MacBook have 20 X sensors, 10 Y sensors
675 */
676 input_set_abs_params(input_dev, ABS_X, 0,
677 ((20 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
678 input_set_abs_params(input_dev, ABS_Y, 0,
679 ((10 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
680 } else if (atp_is_geyser_2(dev)) {
681 /*
682 * Oct 2005 15" PowerBooks have 15 X sensors, 17" are detected
683 * later.
684 */
685 input_set_abs_params(input_dev, ABS_X, 0,
686 ((15 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
687 input_set_abs_params(input_dev, ABS_Y, 0,
688 ((9 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
689 } else {
690 /*
691 * 12" and 15" Powerbooks only have 16 x sensors,
692 * 17" models are detected later.
693 */
694 input_set_abs_params(input_dev, ABS_X, 0,
695 (16 - 1) * ATP_XFACT - 1, ATP_FUZZ, 0);
696 input_set_abs_params(input_dev, ABS_Y, 0,
697 (ATP_YSENSORS - 1) * ATP_YFACT - 1, ATP_FUZZ, 0);
698 }
699 input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
700
701 set_bit(EV_KEY, input_dev->evbit);
702 set_bit(BTN_TOUCH, input_dev->keybit);
703 set_bit(BTN_TOOL_FINGER, input_dev->keybit);
704 set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
705 set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
706 set_bit(BTN_LEFT, input_dev->keybit);
707
708 error = input_register_device(dev->input);
709 if (error)
710 goto err_free_buffer;
711
712 /* save our data pointer in this interface device */
713 usb_set_intfdata(iface, dev);
714
715 INIT_WORK(&dev->work, atp_reinit);
716
717 return 0;
718
719 err_free_buffer:
720 usb_buffer_free(dev->udev, dev->datalen,
721 dev->data, dev->urb->transfer_dma);
722 err_free_urb:
723 usb_free_urb(dev->urb);
724 err_free_devs:
725 usb_set_intfdata(iface, NULL);
726 kfree(dev);
727 input_free_device(input_dev);
728 return error;
729 }
730
731 static void atp_disconnect(struct usb_interface *iface)
732 {
733 struct atp *dev = usb_get_intfdata(iface);
734
735 usb_set_intfdata(iface, NULL);
736 if (dev) {
737 usb_kill_urb(dev->urb);
738 input_unregister_device(dev->input);
739 usb_buffer_free(dev->udev, dev->datalen,
740 dev->data, dev->urb->transfer_dma);
741 usb_free_urb(dev->urb);
742 kfree(dev);
743 }
744 printk(KERN_INFO "input: appletouch disconnected\n");
745 }
746
747 static int atp_suspend(struct usb_interface *iface, pm_message_t message)
748 {
749 struct atp *dev = usb_get_intfdata(iface);
750
751 usb_kill_urb(dev->urb);
752 dev->valid = 0;
753
754 return 0;
755 }
756
757 static int atp_resume(struct usb_interface *iface)
758 {
759 struct atp *dev = usb_get_intfdata(iface);
760
761 if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
762 return -EIO;
763
764 return 0;
765 }
766
767 static struct usb_driver atp_driver = {
768 .name = "appletouch",
769 .probe = atp_probe,
770 .disconnect = atp_disconnect,
771 .suspend = atp_suspend,
772 .resume = atp_resume,
773 .id_table = atp_table,
774 };
775
776 static int __init atp_init(void)
777 {
778 return usb_register(&atp_driver);
779 }
780
781 static void __exit atp_exit(void)
782 {
783 usb_deregister(&atp_driver);
784 }
785
786 module_init(atp_init);
787 module_exit(atp_exit);
Linus' kernel tree