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Input: appletouch - handle geyser 3/4 status bits
[mirror_ubuntu-bionic-kernel.git] / drivers / input / mouse / appletouch.c
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) 2005-2008 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 * Copyright (C) 2007-2008 Sven Anders (anders@anduras.de)
12 *
13 * Thanks to Alex Harper <basilisk@foobox.net> for his inputs.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 *
29 */
30
31 #include <linux/kernel.h>
32 #include <linux/errno.h>
33 #include <linux/init.h>
34 #include <linux/slab.h>
35 #include <linux/module.h>
36 #include <linux/usb/input.h>
37
38 /* Type of touchpad */
39 enum atp_touchpad_type {
40 ATP_FOUNTAIN,
41 ATP_GEYSER1,
42 ATP_GEYSER2,
43 ATP_GEYSER3,
44 ATP_GEYSER4
45 };
46
47 #define ATP_DEVICE(prod, type) \
48 { \
49 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
50 USB_DEVICE_ID_MATCH_INT_CLASS | \
51 USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
52 .idVendor = 0x05ac, /* Apple */ \
53 .idProduct = (prod), \
54 .bInterfaceClass = 0x03, \
55 .bInterfaceProtocol = 0x02, \
56 .driver_info = ATP_ ## type, \
57 }
58
59 /*
60 * Table of devices (Product IDs) that work with this driver.
61 * (The names come from Info.plist in AppleUSBTrackpad.kext,
62 * According to Info.plist Geyser IV is the same as Geyser III.)
63 */
64
65 static struct usb_device_id atp_table [] = {
66 /* PowerBooks Feb 2005, iBooks G4 */
67 ATP_DEVICE(0x020e, FOUNTAIN), /* FOUNTAIN ANSI */
68 ATP_DEVICE(0x020f, FOUNTAIN), /* FOUNTAIN ISO */
69 ATP_DEVICE(0x030a, FOUNTAIN), /* FOUNTAIN TP ONLY */
70 ATP_DEVICE(0x030b, GEYSER1), /* GEYSER 1 TP ONLY */
71
72 /* PowerBooks Oct 2005 */
73 ATP_DEVICE(0x0214, GEYSER2), /* GEYSER 2 ANSI */
74 ATP_DEVICE(0x0215, GEYSER2), /* GEYSER 2 ISO */
75 ATP_DEVICE(0x0216, GEYSER2), /* GEYSER 2 JIS */
76
77 /* Core Duo MacBook & MacBook Pro */
78 ATP_DEVICE(0x0217, GEYSER3), /* GEYSER 3 ANSI */
79 ATP_DEVICE(0x0218, GEYSER3), /* GEYSER 3 ISO */
80 ATP_DEVICE(0x0219, GEYSER3), /* GEYSER 3 JIS */
81
82 /* Core2 Duo MacBook & MacBook Pro */
83 ATP_DEVICE(0x021a, GEYSER4), /* GEYSER 4 ANSI */
84 ATP_DEVICE(0x021b, GEYSER4), /* GEYSER 4 ISO */
85 ATP_DEVICE(0x021c, GEYSER4), /* GEYSER 4 JIS */
86
87 /* Core2 Duo MacBook3,1 */
88 ATP_DEVICE(0x0229, GEYSER4), /* GEYSER 4 HF ANSI */
89 ATP_DEVICE(0x022a, GEYSER4), /* GEYSER 4 HF ISO */
90 ATP_DEVICE(0x022b, GEYSER4), /* GEYSER 4 HF JIS */
91
92 /* Terminating entry */
93 { }
94 };
95 MODULE_DEVICE_TABLE(usb, atp_table);
96
97 /*
98 * number of sensors. Note that only 16 instead of 26 X (horizontal)
99 * sensors exist on 12" and 15" PowerBooks. All models have 16 Y
100 * (vertical) sensors.
101 */
102 #define ATP_XSENSORS 26
103 #define ATP_YSENSORS 16
104
105 /* amount of fuzz this touchpad generates */
106 #define ATP_FUZZ 16
107
108 /* maximum pressure this driver will report */
109 #define ATP_PRESSURE 300
110 /*
111 * multiplication factor for the X and Y coordinates.
112 * We try to keep the touchpad aspect ratio while still doing only simple
113 * arithmetics.
114 * The factors below give coordinates like:
115 *
116 * 0 <= x < 960 on 12" and 15" Powerbooks
117 * 0 <= x < 1600 on 17" Powerbooks and 17" MacBook Pro
118 * 0 <= x < 1216 on MacBooks and 15" MacBook Pro
119 *
120 * 0 <= y < 646 on all Powerbooks
121 * 0 <= y < 774 on all MacBooks
122 */
123 #define ATP_XFACT 64
124 #define ATP_YFACT 43
125
126 /*
127 * Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
128 * ignored.
129 */
130 #define ATP_THRESHOLD 5
131
132 /* Geyser initialization constants */
133 #define ATP_GEYSER_MODE_READ_REQUEST_ID 1
134 #define ATP_GEYSER_MODE_WRITE_REQUEST_ID 9
135 #define ATP_GEYSER_MODE_REQUEST_VALUE 0x300
136 #define ATP_GEYSER_MODE_REQUEST_INDEX 0
137 #define ATP_GEYSER_MODE_VENDOR_VALUE 0x04
138
139 /**
140 * enum atp_status_bits - status bit meanings
141 *
142 * These constants represent the meaning of the status bits.
143 * (only Geyser 3/4)
144 *
145 * @ATP_STATUS_BUTTON: The button was pressed
146 * @ATP_STATUS_BASE_UPDATE: Update of the base values (untouched pad)
147 * @ATP_STATUS_FROM_RESET: Reset previously performed
148 */
149 enum atp_status_bits {
150 ATP_STATUS_BUTTON = BIT(0),
151 ATP_STATUS_BASE_UPDATE = BIT(2),
152 ATP_STATUS_FROM_RESET = BIT(4),
153 };
154
155 /* Structure to hold all of our device specific stuff */
156 struct atp {
157 char phys[64];
158 struct usb_device *udev; /* usb device */
159 struct urb *urb; /* usb request block */
160 u8 *data; /* transferred data */
161 struct input_dev *input; /* input dev */
162 enum atp_touchpad_type type; /* type of touchpad */
163 bool open;
164 bool valid; /* are the samples valid? */
165 bool size_detect_done;
166 bool overflow_warned;
167 int x_old; /* last reported x/y, */
168 int y_old; /* used for smoothing */
169 signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
170 signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
171 int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
172 int datalen; /* size of USB transfer */
173 int idlecount; /* number of empty packets */
174 struct work_struct work;
175 };
176
177 #define dbg_dump(msg, tab) \
178 if (debug > 1) { \
179 int __i; \
180 printk(KERN_DEBUG "appletouch: %s", msg); \
181 for (__i = 0; __i < ATP_XSENSORS + ATP_YSENSORS; __i++) \
182 printk(" %02x", tab[__i]); \
183 printk("\n"); \
184 }
185
186 #define dprintk(format, a...) \
187 do { \
188 if (debug) \
189 printk(KERN_DEBUG format, ##a); \
190 } while (0)
191
192 MODULE_AUTHOR("Johannes Berg");
193 MODULE_AUTHOR("Stelian Pop");
194 MODULE_AUTHOR("Frank Arnold");
195 MODULE_AUTHOR("Michael Hanselmann");
196 MODULE_AUTHOR("Sven Anders");
197 MODULE_DESCRIPTION("Apple PowerBook and MacBook USB touchpad driver");
198 MODULE_LICENSE("GPL");
199
200 /*
201 * Make the threshold a module parameter
202 */
203 static int threshold = ATP_THRESHOLD;
204 module_param(threshold, int, 0644);
205 MODULE_PARM_DESC(threshold, "Discard any change in data from a sensor"
206 " (the trackpad has many of these sensors)"
207 " less than this value.");
208
209 static int debug;
210 module_param(debug, int, 0644);
211 MODULE_PARM_DESC(debug, "Activate debugging output");
212
213 /*
214 * By default newer Geyser devices send standard USB HID mouse
215 * packets (Report ID 2). This code changes device mode, so it
216 * sends raw sensor reports (Report ID 5).
217 */
218 static int atp_geyser_init(struct usb_device *udev)
219 {
220 char data[8];
221 int size;
222 int i;
223
224 size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
225 ATP_GEYSER_MODE_READ_REQUEST_ID,
226 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
227 ATP_GEYSER_MODE_REQUEST_VALUE,
228 ATP_GEYSER_MODE_REQUEST_INDEX, &data, 8, 5000);
229
230 if (size != 8) {
231 dprintk("atp_geyser_init: read error\n");
232 for (i = 0; i < 8; i++)
233 dprintk("appletouch[%d]: %d\n", i, data[i]);
234
235 err("Failed to read mode from device.");
236 return -EIO;
237 }
238
239 /* Apply the mode switch */
240 data[0] = ATP_GEYSER_MODE_VENDOR_VALUE;
241
242 size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
243 ATP_GEYSER_MODE_WRITE_REQUEST_ID,
244 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
245 ATP_GEYSER_MODE_REQUEST_VALUE,
246 ATP_GEYSER_MODE_REQUEST_INDEX, &data, 8, 5000);
247
248 if (size != 8) {
249 dprintk("atp_geyser_init: write error\n");
250 for (i = 0; i < 8; i++)
251 dprintk("appletouch[%d]: %d\n", i, data[i]);
252
253 err("Failed to request geyser raw mode");
254 return -EIO;
255 }
256 return 0;
257 }
258
259 /*
260 * Reinitialise the device. This usually stops stream of empty packets
261 * coming from it.
262 */
263 static void atp_reinit(struct work_struct *work)
264 {
265 struct atp *dev = container_of(work, struct atp, work);
266 struct usb_device *udev = dev->udev;
267 int retval;
268
269 dprintk("appletouch: putting appletouch to sleep (reinit)\n");
270 atp_geyser_init(udev);
271
272 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
273 if (retval)
274 err("atp_reinit: usb_submit_urb failed with error %d",
275 retval);
276 }
277
278 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
279 int *z, int *fingers)
280 {
281 int i;
282 /* values to calculate mean */
283 int pcum = 0, psum = 0;
284 int is_increasing = 0;
285
286 *fingers = 0;
287
288 for (i = 0; i < nb_sensors; i++) {
289 if (xy_sensors[i] < threshold) {
290 if (is_increasing)
291 is_increasing = 0;
292
293 continue;
294 }
295
296 /*
297 * Makes the finger detection more versatile. For example,
298 * two fingers with no gap will be detected. Also, my
299 * tests show it less likely to have intermittent loss
300 * of multiple finger readings while moving around (scrolling).
301 *
302 * Changes the multiple finger detection to counting humps on
303 * sensors (transitions from nonincreasing to increasing)
304 * instead of counting transitions from low sensors (no
305 * finger reading) to high sensors (finger above
306 * sensor)
307 *
308 * - Jason Parekh <jasonparekh@gmail.com>
309 */
310 if (i < 1 ||
311 (!is_increasing && xy_sensors[i - 1] < xy_sensors[i])) {
312 (*fingers)++;
313 is_increasing = 1;
314 } else if (i > 0 && xy_sensors[i - 1] >= xy_sensors[i]) {
315 is_increasing = 0;
316 }
317
318 /*
319 * Subtracts threshold so a high sensor that just passes the
320 * threshold won't skew the calculated absolute coordinate.
321 * Fixes an issue where slowly moving the mouse would
322 * occasionally jump a number of pixels (slowly moving the
323 * finger makes this issue most apparent.)
324 */
325 pcum += (xy_sensors[i] - threshold) * i;
326 psum += (xy_sensors[i] - threshold);
327 }
328
329 if (psum > 0) {
330 *z = psum;
331 return pcum * fact / psum;
332 }
333
334 return 0;
335 }
336
337 static inline void atp_report_fingers(struct input_dev *input, int fingers)
338 {
339 input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
340 input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
341 input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
342 }
343
344 /* Check URB status and for correct length of data package */
345
346 #define ATP_URB_STATUS_SUCCESS 0
347 #define ATP_URB_STATUS_ERROR 1
348 #define ATP_URB_STATUS_ERROR_FATAL 2
349
350 static int atp_status_check(struct urb *urb)
351 {
352 struct atp *dev = urb->context;
353
354 switch (urb->status) {
355 case 0:
356 /* success */
357 break;
358 case -EOVERFLOW:
359 if (!dev->overflow_warned) {
360 printk(KERN_WARNING "appletouch: OVERFLOW with data "
361 "length %d, actual length is %d\n",
362 dev->datalen, dev->urb->actual_length);
363 dev->overflow_warned = true;
364 }
365 case -ECONNRESET:
366 case -ENOENT:
367 case -ESHUTDOWN:
368 /* This urb is terminated, clean up */
369 dbg("atp_complete: urb shutting down with status: %d",
370 urb->status);
371 return ATP_URB_STATUS_ERROR_FATAL;
372
373 default:
374 dbg("atp_complete: nonzero urb status received: %d",
375 urb->status);
376 return ATP_URB_STATUS_ERROR;
377 }
378
379 /* drop incomplete datasets */
380 if (dev->urb->actual_length != dev->datalen) {
381 dprintk("appletouch: incomplete data package"
382 " (first byte: %d, length: %d).\n",
383 dev->data[0], dev->urb->actual_length);
384 return ATP_URB_STATUS_ERROR;
385 }
386
387 return ATP_URB_STATUS_SUCCESS;
388 }
389
390 /*
391 * USB interrupt callback functions
392 */
393
394 /* Interrupt function for older touchpads: FOUNTAIN/GEYSER1/GEYSER2 */
395
396 static void atp_complete_geyser_1_2(struct urb *urb)
397 {
398 int x, y, x_z, y_z, x_f, y_f;
399 int retval, i, j;
400 int key;
401 struct atp *dev = urb->context;
402 int status = atp_status_check(urb);
403
404 if (status == ATP_URB_STATUS_ERROR_FATAL)
405 return;
406 else if (status == ATP_URB_STATUS_ERROR)
407 goto exit;
408
409 /* reorder the sensors values */
410 if (dev->type == ATP_GEYSER2) {
411 memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
412
413 /*
414 * The values are laid out like this:
415 * Y1, Y2, -, Y3, Y4, -, ..., X1, X2, -, X3, X4, -, ...
416 * '-' is an unused value.
417 */
418
419 /* read X values */
420 for (i = 0, j = 19; i < 20; i += 2, j += 3) {
421 dev->xy_cur[i] = dev->data[j];
422 dev->xy_cur[i + 1] = dev->data[j + 1];
423 }
424
425 /* read Y values */
426 for (i = 0, j = 1; i < 9; i += 2, j += 3) {
427 dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
428 dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
429 }
430 } else {
431 for (i = 0; i < 8; i++) {
432 /* X values */
433 dev->xy_cur[i + 0] = dev->data[5 * i + 2];
434 dev->xy_cur[i + 8] = dev->data[5 * i + 4];
435 dev->xy_cur[i + 16] = dev->data[5 * i + 42];
436 if (i < 2)
437 dev->xy_cur[i + 24] = dev->data[5 * i + 44];
438
439 /* Y values */
440 dev->xy_cur[i + 26] = dev->data[5 * i + 1];
441 dev->xy_cur[i + 34] = dev->data[5 * i + 3];
442 }
443 }
444
445 dbg_dump("sample", dev->xy_cur);
446
447 if (!dev->valid) {
448 /* first sample */
449 dev->valid = true;
450 dev->x_old = dev->y_old = -1;
451
452 /* Store first sample */
453 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
454
455 /* Perform size detection, if not done already */
456 if (!dev->size_detect_done) {
457
458 /* 17" Powerbooks have extra X sensors */
459 for (i = (dev->type == ATP_GEYSER2 ? 15 : 16);
460 i < ATP_XSENSORS; i++) {
461 if (!dev->xy_cur[i])
462 continue;
463
464 printk(KERN_INFO
465 "appletouch: 17\" model detected.\n");
466
467 if (dev->type == ATP_GEYSER2)
468 input_set_abs_params(dev->input, ABS_X,
469 0,
470 (20 - 1) *
471 ATP_XFACT - 1,
472 ATP_FUZZ, 0);
473 else
474 input_set_abs_params(dev->input, ABS_X,
475 0,
476 (26 - 1) *
477 ATP_XFACT - 1,
478 ATP_FUZZ, 0);
479 break;
480 }
481
482 dev->size_detect_done = 1;
483 goto exit;
484 }
485 }
486
487 for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
488 /* accumulate the change */
489 signed char change = dev->xy_old[i] - dev->xy_cur[i];
490 dev->xy_acc[i] -= change;
491
492 /* prevent down drifting */
493 if (dev->xy_acc[i] < 0)
494 dev->xy_acc[i] = 0;
495 }
496
497 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
498
499 dbg_dump("accumulator", dev->xy_acc);
500
501 x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
502 ATP_XFACT, &x_z, &x_f);
503 y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
504 ATP_YFACT, &y_z, &y_f);
505 key = dev->data[dev->datalen - 1] & ATP_STATUS_BUTTON;
506
507 if (x && y) {
508 if (dev->x_old != -1) {
509 x = (dev->x_old * 3 + x) >> 2;
510 y = (dev->y_old * 3 + y) >> 2;
511 dev->x_old = x;
512 dev->y_old = y;
513
514 if (debug > 1)
515 printk(KERN_DEBUG "appletouch: "
516 "X: %3d Y: %3d Xz: %3d Yz: %3d\n",
517 x, y, x_z, y_z);
518
519 input_report_key(dev->input, BTN_TOUCH, 1);
520 input_report_abs(dev->input, ABS_X, x);
521 input_report_abs(dev->input, ABS_Y, y);
522 input_report_abs(dev->input, ABS_PRESSURE,
523 min(ATP_PRESSURE, x_z + y_z));
524 atp_report_fingers(dev->input, max(x_f, y_f));
525 }
526 dev->x_old = x;
527 dev->y_old = y;
528
529 } else if (!x && !y) {
530
531 dev->x_old = dev->y_old = -1;
532 input_report_key(dev->input, BTN_TOUCH, 0);
533 input_report_abs(dev->input, ABS_PRESSURE, 0);
534 atp_report_fingers(dev->input, 0);
535
536 /* reset the accumulator on release */
537 memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
538 }
539
540 input_report_key(dev->input, BTN_LEFT, key);
541 input_sync(dev->input);
542
543 exit:
544 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
545 if (retval)
546 err("atp_complete: usb_submit_urb failed with result %d",
547 retval);
548 }
549
550 /* Interrupt function for older touchpads: GEYSER3/GEYSER4 */
551
552 static void atp_complete_geyser_3_4(struct urb *urb)
553 {
554 int x, y, x_z, y_z, x_f, y_f;
555 int retval, i, j;
556 int key;
557 struct atp *dev = urb->context;
558 int status = atp_status_check(urb);
559
560 if (status == ATP_URB_STATUS_ERROR_FATAL)
561 return;
562 else if (status == ATP_URB_STATUS_ERROR)
563 goto exit;
564
565 /* Reorder the sensors values:
566 *
567 * The values are laid out like this:
568 * -, Y1, Y2, -, Y3, Y4, -, ..., -, X1, X2, -, X3, X4, ...
569 * '-' is an unused value.
570 */
571
572 /* read X values */
573 for (i = 0, j = 19; i < 20; i += 2, j += 3) {
574 dev->xy_cur[i] = dev->data[j + 1];
575 dev->xy_cur[i + 1] = dev->data[j + 2];
576 }
577 /* read Y values */
578 for (i = 0, j = 1; i < 9; i += 2, j += 3) {
579 dev->xy_cur[ATP_XSENSORS + i] = dev->data[j + 1];
580 dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 2];
581 }
582
583 dbg_dump("sample", dev->xy_cur);
584
585 /* Just update the base values (i.e. touchpad in untouched state) */
586 if (dev->data[dev->datalen - 1] & ATP_STATUS_BASE_UPDATE) {
587
588 dprintk(KERN_DEBUG "appletouch: updated base values\n");
589
590 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
591 goto exit;
592 }
593
594 for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
595 /* calculate the change */
596 dev->xy_acc[i] = dev->xy_cur[i] - dev->xy_old[i];
597
598 /* this is a round-robin value, so couple with that */
599 if (dev->xy_acc[i] > 127)
600 dev->xy_acc[i] -= 256;
601
602 if (dev->xy_acc[i] < -127)
603 dev->xy_acc[i] += 256;
604
605 /* prevent down drifting */
606 if (dev->xy_acc[i] < 0)
607 dev->xy_acc[i] = 0;
608 }
609
610 dbg_dump("accumulator", dev->xy_acc);
611
612 x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
613 ATP_XFACT, &x_z, &x_f);
614 y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
615 ATP_YFACT, &y_z, &y_f);
616 key = dev->data[dev->datalen - 1] & ATP_STATUS_BUTTON;
617
618 if (x && y) {
619 if (dev->x_old != -1) {
620 x = (dev->x_old * 3 + x) >> 2;
621 y = (dev->y_old * 3 + y) >> 2;
622 dev->x_old = x;
623 dev->y_old = y;
624
625 if (debug > 1)
626 printk(KERN_DEBUG "appletouch: X: %3d Y: %3d "
627 "Xz: %3d Yz: %3d\n",
628 x, y, x_z, y_z);
629
630 input_report_key(dev->input, BTN_TOUCH, 1);
631 input_report_abs(dev->input, ABS_X, x);
632 input_report_abs(dev->input, ABS_Y, y);
633 input_report_abs(dev->input, ABS_PRESSURE,
634 min(ATP_PRESSURE, x_z + y_z));
635 atp_report_fingers(dev->input, max(x_f, y_f));
636 }
637 dev->x_old = x;
638 dev->y_old = y;
639
640 } else if (!x && !y) {
641
642 dev->x_old = dev->y_old = -1;
643 input_report_key(dev->input, BTN_TOUCH, 0);
644 input_report_abs(dev->input, ABS_PRESSURE, 0);
645 atp_report_fingers(dev->input, 0);
646
647 /* reset the accumulator on release */
648 memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
649 }
650
651 input_report_key(dev->input, BTN_LEFT, key);
652 input_sync(dev->input);
653
654 /*
655 * Geysers 3/4 will continue to send packets continually after
656 * the first touch unless reinitialised. Do so if it's been
657 * idle for a while in order to avoid waking the kernel up
658 * several hundred times a second.
659 */
660
661 /*
662 * Button must not be pressed when entering suspend,
663 * otherwise we will never release the button.
664 */
665 if (!x && !y && !key) {
666 dev->idlecount++;
667 if (dev->idlecount == 10) {
668 dev->x_old = dev->y_old = -1;
669 dev->idlecount = 0;
670 schedule_work(&dev->work);
671 /* Don't resubmit urb here, wait for reinit */
672 return;
673 }
674 } else
675 dev->idlecount = 0;
676
677 exit:
678 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
679 if (retval)
680 err("atp_complete: usb_submit_urb failed with result %d",
681 retval);
682 }
683
684 static int atp_open(struct input_dev *input)
685 {
686 struct atp *dev = input_get_drvdata(input);
687
688 if (usb_submit_urb(dev->urb, GFP_ATOMIC))
689 return -EIO;
690
691 dev->open = 1;
692 return 0;
693 }
694
695 static void atp_close(struct input_dev *input)
696 {
697 struct atp *dev = input_get_drvdata(input);
698
699 usb_kill_urb(dev->urb);
700 cancel_work_sync(&dev->work);
701 dev->open = 0;
702 }
703
704 static int atp_handle_geyser(struct atp *dev)
705 {
706 struct usb_device *udev = dev->udev;
707
708 if (dev->type != ATP_FOUNTAIN) {
709 /* switch to raw sensor mode */
710 if (atp_geyser_init(udev))
711 return -EIO;
712
713 printk(KERN_INFO "appletouch: Geyser mode initialized.\n");
714 }
715
716 return 0;
717 }
718
719 static int atp_probe(struct usb_interface *iface,
720 const struct usb_device_id *id)
721 {
722 struct atp *dev;
723 struct input_dev *input_dev;
724 struct usb_device *udev = interface_to_usbdev(iface);
725 struct usb_host_interface *iface_desc;
726 struct usb_endpoint_descriptor *endpoint;
727 int int_in_endpointAddr = 0;
728 int i, error = -ENOMEM;
729
730 /* set up the endpoint information */
731 /* use only the first interrupt-in endpoint */
732 iface_desc = iface->cur_altsetting;
733 for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
734 endpoint = &iface_desc->endpoint[i].desc;
735 if (!int_in_endpointAddr && usb_endpoint_is_int_in(endpoint)) {
736 /* we found an interrupt in endpoint */
737 int_in_endpointAddr = endpoint->bEndpointAddress;
738 break;
739 }
740 }
741 if (!int_in_endpointAddr) {
742 err("Could not find int-in endpoint");
743 return -EIO;
744 }
745
746 /* allocate memory for our device state and initialize it */
747 dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
748 input_dev = input_allocate_device();
749 if (!dev || !input_dev) {
750 err("Out of memory");
751 goto err_free_devs;
752 }
753
754 dev->udev = udev;
755 dev->input = input_dev;
756 dev->type = id->driver_info;
757 dev->overflow_warned = false;
758 if (dev->type == ATP_FOUNTAIN || dev->type == ATP_GEYSER1)
759 dev->datalen = 81;
760 else
761 dev->datalen = 64;
762
763 dev->urb = usb_alloc_urb(0, GFP_KERNEL);
764 if (!dev->urb)
765 goto err_free_devs;
766
767 dev->data = usb_buffer_alloc(dev->udev, dev->datalen, GFP_KERNEL,
768 &dev->urb->transfer_dma);
769 if (!dev->data)
770 goto err_free_urb;
771
772 /* Select the USB complete (callback) function */
773 if (dev->type == ATP_FOUNTAIN ||
774 dev->type == ATP_GEYSER1 ||
775 dev->type == ATP_GEYSER2)
776 usb_fill_int_urb(dev->urb, udev,
777 usb_rcvintpipe(udev, int_in_endpointAddr),
778 dev->data, dev->datalen,
779 atp_complete_geyser_1_2, dev, 1);
780 else
781 usb_fill_int_urb(dev->urb, udev,
782 usb_rcvintpipe(udev, int_in_endpointAddr),
783 dev->data, dev->datalen,
784 atp_complete_geyser_3_4, dev, 1);
785
786 error = atp_handle_geyser(dev);
787 if (error)
788 goto err_free_buffer;
789
790 usb_make_path(udev, dev->phys, sizeof(dev->phys));
791 strlcat(dev->phys, "/input0", sizeof(dev->phys));
792
793 input_dev->name = "appletouch";
794 input_dev->phys = dev->phys;
795 usb_to_input_id(dev->udev, &input_dev->id);
796 input_dev->dev.parent = &iface->dev;
797
798 input_set_drvdata(input_dev, dev);
799
800 input_dev->open = atp_open;
801 input_dev->close = atp_close;
802
803 set_bit(EV_ABS, input_dev->evbit);
804
805 if (dev->type == ATP_GEYSER3 || dev->type == ATP_GEYSER4) {
806 /*
807 * MacBook have 20 X sensors, 10 Y sensors
808 */
809 input_set_abs_params(input_dev, ABS_X, 0,
810 ((20 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
811 input_set_abs_params(input_dev, ABS_Y, 0,
812 ((10 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
813 } else if (dev->type == ATP_GEYSER2) {
814 /*
815 * Oct 2005 15" PowerBooks have 15 X sensors, 17" are detected
816 * later.
817 */
818 input_set_abs_params(input_dev, ABS_X, 0,
819 ((15 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
820 input_set_abs_params(input_dev, ABS_Y, 0,
821 ((9 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
822 } else {
823 /*
824 * 12" and 15" Powerbooks only have 16 x sensors,
825 * 17" models are detected later.
826 */
827 input_set_abs_params(input_dev, ABS_X, 0,
828 (16 - 1) * ATP_XFACT - 1,
829 ATP_FUZZ, 0);
830 input_set_abs_params(input_dev, ABS_Y, 0,
831 (ATP_YSENSORS - 1) * ATP_YFACT - 1,
832 ATP_FUZZ, 0);
833 }
834 input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
835
836 set_bit(EV_KEY, input_dev->evbit);
837 set_bit(BTN_TOUCH, input_dev->keybit);
838 set_bit(BTN_TOOL_FINGER, input_dev->keybit);
839 set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
840 set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
841 set_bit(BTN_LEFT, input_dev->keybit);
842
843 error = input_register_device(dev->input);
844 if (error)
845 goto err_free_buffer;
846
847 /* save our data pointer in this interface device */
848 usb_set_intfdata(iface, dev);
849
850 INIT_WORK(&dev->work, atp_reinit);
851
852 return 0;
853
854 err_free_buffer:
855 usb_buffer_free(dev->udev, dev->datalen,
856 dev->data, dev->urb->transfer_dma);
857 err_free_urb:
858 usb_free_urb(dev->urb);
859 err_free_devs:
860 usb_set_intfdata(iface, NULL);
861 kfree(dev);
862 input_free_device(input_dev);
863 return error;
864 }
865
866 static void atp_disconnect(struct usb_interface *iface)
867 {
868 struct atp *dev = usb_get_intfdata(iface);
869
870 usb_set_intfdata(iface, NULL);
871 if (dev) {
872 usb_kill_urb(dev->urb);
873 input_unregister_device(dev->input);
874 usb_buffer_free(dev->udev, dev->datalen,
875 dev->data, dev->urb->transfer_dma);
876 usb_free_urb(dev->urb);
877 kfree(dev);
878 }
879 printk(KERN_INFO "input: appletouch disconnected\n");
880 }
881
882 static int atp_recover(struct atp *dev)
883 {
884 int error;
885
886 error = atp_handle_geyser(dev);
887 if (error)
888 return error;
889
890 if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
891 return -EIO;
892
893 return 0;
894 }
895
896 static int atp_suspend(struct usb_interface *iface, pm_message_t message)
897 {
898 struct atp *dev = usb_get_intfdata(iface);
899
900 usb_kill_urb(dev->urb);
901 return 0;
902 }
903
904 static int atp_resume(struct usb_interface *iface)
905 {
906 struct atp *dev = usb_get_intfdata(iface);
907
908 if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
909 return -EIO;
910
911 return 0;
912 }
913
914 static int atp_reset_resume(struct usb_interface *iface)
915 {
916 struct atp *dev = usb_get_intfdata(iface);
917
918 return atp_recover(dev);
919 }
920
921 static struct usb_driver atp_driver = {
922 .name = "appletouch",
923 .probe = atp_probe,
924 .disconnect = atp_disconnect,
925 .suspend = atp_suspend,
926 .resume = atp_resume,
927 .reset_resume = atp_reset_resume,
928 .id_table = atp_table,
929 };
930
931 static int __init atp_init(void)
932 {
933 return usb_register(&atp_driver);
934 }
935
936 static void __exit atp_exit(void)
937 {
938 usb_deregister(&atp_driver);
939 }
940
941 module_init(atp_init);
942 module_exit(atp_exit);
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