2 * Apple USB BCM5974 (Macbook Air and Penryn Macbook Pro) multitouch driver
4 * Copyright (C) 2008 Henrik Rydberg (rydberg@euromail.se)
6 * The USB initialization and package decoding was made by
7 * Scott Shawcroft as part of the touchd user-space driver project:
8 * Copyright (C) 2008 Scott Shawcroft (scott.shawcroft@gmail.com)
10 * The BCM5974 driver is based on the appletouch driver:
11 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
12 * Copyright (C) 2005 Johannes Berg (johannes@sipsolutions.net)
13 * Copyright (C) 2005 Stelian Pop (stelian@popies.net)
14 * Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de)
15 * Copyright (C) 2005 Peter Osterlund (petero2@telia.com)
16 * Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch)
17 * Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch)
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
35 #include <linux/kernel.h>
36 #include <linux/errno.h>
37 #include <linux/init.h>
38 #include <linux/slab.h>
39 #include <linux/module.h>
40 #include <linux/usb/input.h>
41 #include <linux/hid.h>
42 #include <linux/mutex.h>
44 #define USB_VENDOR_ID_APPLE 0x05ac
46 /* MacbookAir, aka wellspring */
47 #define USB_DEVICE_ID_APPLE_WELLSPRING_ANSI 0x0223
48 #define USB_DEVICE_ID_APPLE_WELLSPRING_ISO 0x0224
49 #define USB_DEVICE_ID_APPLE_WELLSPRING_JIS 0x0225
50 /* MacbookProPenryn, aka wellspring2 */
51 #define USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI 0x0230
52 #define USB_DEVICE_ID_APPLE_WELLSPRING2_ISO 0x0231
53 #define USB_DEVICE_ID_APPLE_WELLSPRING2_JIS 0x0232
54 /* Macbook5,1 (unibody), aka wellspring3 */
55 #define USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI 0x0236
56 #define USB_DEVICE_ID_APPLE_WELLSPRING3_ISO 0x0237
57 #define USB_DEVICE_ID_APPLE_WELLSPRING3_JIS 0x0238
58 /* MacbookAir3,2 (unibody), aka wellspring5 */
59 #define USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI 0x023f
60 #define USB_DEVICE_ID_APPLE_WELLSPRING4_ISO 0x0240
61 #define USB_DEVICE_ID_APPLE_WELLSPRING4_JIS 0x0241
62 /* MacbookAir3,1 (unibody), aka wellspring4 */
63 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI 0x0242
64 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO 0x0243
65 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS 0x0244
66 /* Macbook8 (unibody, March 2011) */
67 #define USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI 0x0245
68 #define USB_DEVICE_ID_APPLE_WELLSPRING5_ISO 0x0246
69 #define USB_DEVICE_ID_APPLE_WELLSPRING5_JIS 0x0247
70 /* MacbookAir4,1 (unibody, July 2011) */
71 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI 0x0249
72 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO 0x024a
73 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS 0x024b
74 /* MacbookAir4,2 (unibody, July 2011) */
75 #define USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI 0x024c
76 #define USB_DEVICE_ID_APPLE_WELLSPRING6_ISO 0x024d
77 #define USB_DEVICE_ID_APPLE_WELLSPRING6_JIS 0x024e
78 /* Macbook8,2 (unibody) */
79 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI 0x0252
80 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO 0x0253
81 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS 0x0254
83 #define BCM5974_DEVICE(prod) { \
84 .match_flags = (USB_DEVICE_ID_MATCH_DEVICE | \
85 USB_DEVICE_ID_MATCH_INT_CLASS | \
86 USB_DEVICE_ID_MATCH_INT_PROTOCOL), \
87 .idVendor = USB_VENDOR_ID_APPLE, \
88 .idProduct = (prod), \
89 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
90 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE \
93 /* table of devices that work with this driver */
94 static const struct usb_device_id bcm5974_table[] = {
96 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI),
97 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO),
98 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS),
99 /* MacbookProPenryn */
100 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI),
101 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO),
102 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS),
104 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI),
105 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ISO),
106 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_JIS),
108 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI),
109 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ISO),
110 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_JIS),
112 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI),
113 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO),
114 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS),
116 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI),
117 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ISO),
118 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_JIS),
120 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI),
121 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO),
122 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS),
124 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI),
125 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ISO),
126 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_JIS),
128 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI),
129 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO),
130 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS),
131 /* Terminating entry */
134 MODULE_DEVICE_TABLE(usb, bcm5974_table);
136 MODULE_AUTHOR("Henrik Rydberg");
137 MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver");
138 MODULE_LICENSE("GPL");
140 #define dprintk(level, format, a...)\
141 { if (debug >= level) printk(KERN_DEBUG format, ##a); }
143 static int debug = 1;
144 module_param(debug, int, 0644);
145 MODULE_PARM_DESC(debug, "Activate debugging output");
147 /* button data structure */
149 u8 unknown1; /* constant */
150 u8 button; /* left button */
151 u8 rel_x; /* relative x coordinate */
152 u8 rel_y; /* relative y coordinate */
155 /* trackpad header types */
157 TYPE1, /* plain trackpad */
158 TYPE2 /* button integrated in trackpad */
161 /* trackpad finger data offsets, le16-aligned */
162 #define FINGER_TYPE1 (13 * sizeof(__le16))
163 #define FINGER_TYPE2 (15 * sizeof(__le16))
165 /* trackpad button data offsets */
166 #define BUTTON_TYPE2 15
168 /* list of device capability bits */
169 #define HAS_INTEGRATED_BUTTON 1
171 /* trackpad finger structure, le16-aligned */
173 __le16 origin; /* zero when switching track finger */
174 __le16 abs_x; /* absolute x coodinate */
175 __le16 abs_y; /* absolute y coodinate */
176 __le16 rel_x; /* relative x coodinate */
177 __le16 rel_y; /* relative y coodinate */
178 __le16 size_major; /* finger size, major axis? */
179 __le16 size_minor; /* finger size, minor axis? */
180 __le16 orientation; /* 16384 when point, else 15 bit angle */
181 __le16 force_major; /* trackpad force, major axis? */
182 __le16 force_minor; /* trackpad force, minor axis? */
183 __le16 unused[3]; /* zeros */
184 __le16 multi; /* one finger: varies, more fingers: constant */
185 } __attribute__((packed,aligned(2)));
187 /* trackpad finger data size, empirically at least ten fingers */
188 #define SIZEOF_FINGER sizeof(struct tp_finger)
189 #define SIZEOF_ALL_FINGERS (16 * SIZEOF_FINGER)
190 #define MAX_FINGER_ORIENTATION 16384
192 /* device-specific parameters */
193 struct bcm5974_param {
194 int dim; /* logical dimension */
195 int fuzz; /* logical noise value */
196 int devmin; /* device minimum reading */
197 int devmax; /* device maximum reading */
200 /* device-specific configuration */
201 struct bcm5974_config {
202 int ansi, iso, jis; /* the product id of this device */
203 int caps; /* device capability bitmask */
204 int bt_ep; /* the endpoint of the button interface */
205 int bt_datalen; /* data length of the button interface */
206 int tp_ep; /* the endpoint of the trackpad interface */
207 enum tp_type tp_type; /* type of trackpad interface */
208 int tp_offset; /* offset to trackpad finger data */
209 int tp_datalen; /* data length of the trackpad interface */
210 struct bcm5974_param p; /* finger pressure limits */
211 struct bcm5974_param w; /* finger width limits */
212 struct bcm5974_param x; /* horizontal limits */
213 struct bcm5974_param y; /* vertical limits */
216 /* logical device structure */
219 struct usb_device *udev; /* usb device */
220 struct usb_interface *intf; /* our interface */
221 struct input_dev *input; /* input dev */
222 struct bcm5974_config cfg; /* device configuration */
223 struct mutex pm_mutex; /* serialize access to open/suspend */
224 int opened; /* 1: opened, 0: closed */
225 struct urb *bt_urb; /* button usb request block */
226 struct bt_data *bt_data; /* button transferred data */
227 struct urb *tp_urb; /* trackpad usb request block */
228 u8 *tp_data; /* trackpad transferred data */
229 int fingers; /* number of fingers on trackpad */
232 /* logical dimensions */
233 #define DIM_PRESSURE 256 /* maximum finger pressure */
234 #define DIM_WIDTH 16 /* maximum finger width */
235 #define DIM_X 1280 /* maximum trackpad x value */
236 #define DIM_Y 800 /* maximum trackpad y value */
238 /* logical signal quality */
239 #define SN_PRESSURE 45 /* pressure signal-to-noise ratio */
240 #define SN_WIDTH 100 /* width signal-to-noise ratio */
241 #define SN_COORD 250 /* coordinate signal-to-noise ratio */
243 /* pressure thresholds */
244 #define PRESSURE_LOW (2 * DIM_PRESSURE / SN_PRESSURE)
245 #define PRESSURE_HIGH (3 * PRESSURE_LOW)
247 /* device constants */
248 static const struct bcm5974_config bcm5974_config_table[] = {
250 USB_DEVICE_ID_APPLE_WELLSPRING_ANSI,
251 USB_DEVICE_ID_APPLE_WELLSPRING_ISO,
252 USB_DEVICE_ID_APPLE_WELLSPRING_JIS,
254 0x84, sizeof(struct bt_data),
255 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS,
256 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 },
257 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
258 { DIM_X, DIM_X / SN_COORD, -4824, 5342 },
259 { DIM_Y, DIM_Y / SN_COORD, -172, 5820 }
262 USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI,
263 USB_DEVICE_ID_APPLE_WELLSPRING2_ISO,
264 USB_DEVICE_ID_APPLE_WELLSPRING2_JIS,
266 0x84, sizeof(struct bt_data),
267 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS,
268 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 },
269 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
270 { DIM_X, DIM_X / SN_COORD, -4824, 4824 },
271 { DIM_Y, DIM_Y / SN_COORD, -172, 4290 }
274 USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI,
275 USB_DEVICE_ID_APPLE_WELLSPRING3_ISO,
276 USB_DEVICE_ID_APPLE_WELLSPRING3_JIS,
277 HAS_INTEGRATED_BUTTON,
278 0x84, sizeof(struct bt_data),
279 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
280 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 },
281 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
282 { DIM_X, DIM_X / SN_COORD, -4460, 5166 },
283 { DIM_Y, DIM_Y / SN_COORD, -75, 6700 }
286 USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI,
287 USB_DEVICE_ID_APPLE_WELLSPRING4_ISO,
288 USB_DEVICE_ID_APPLE_WELLSPRING4_JIS,
289 HAS_INTEGRATED_BUTTON,
290 0x84, sizeof(struct bt_data),
291 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
292 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 },
293 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
294 { DIM_X, DIM_X / SN_COORD, -4620, 5140 },
295 { DIM_Y, DIM_Y / SN_COORD, -150, 6600 }
298 USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI,
299 USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO,
300 USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS,
301 HAS_INTEGRATED_BUTTON,
302 0x84, sizeof(struct bt_data),
303 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
304 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 },
305 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
306 { DIM_X, DIM_X / SN_COORD, -4616, 5112 },
307 { DIM_Y, DIM_Y / SN_COORD, -142, 5234 }
310 USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI,
311 USB_DEVICE_ID_APPLE_WELLSPRING5_ISO,
312 USB_DEVICE_ID_APPLE_WELLSPRING5_JIS,
313 HAS_INTEGRATED_BUTTON,
314 0x84, sizeof(struct bt_data),
315 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
316 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 },
317 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
318 { DIM_X, DIM_X / SN_COORD, -4415, 5050 },
319 { DIM_Y, DIM_Y / SN_COORD, -55, 6680 }
322 USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI,
323 USB_DEVICE_ID_APPLE_WELLSPRING6_ISO,
324 USB_DEVICE_ID_APPLE_WELLSPRING6_JIS,
325 HAS_INTEGRATED_BUTTON,
326 0x84, sizeof(struct bt_data),
327 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
328 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 },
329 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
330 { DIM_X, DIM_X / SN_COORD, -4620, 5140 },
331 { DIM_Y, DIM_Y / SN_COORD, -150, 6600 }
334 USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI,
335 USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO,
336 USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS,
337 HAS_INTEGRATED_BUTTON,
338 0x84, sizeof(struct bt_data),
339 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
340 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 },
341 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
342 { DIM_X, DIM_X / SN_COORD, -4750, 5280 },
343 { DIM_Y, DIM_Y / SN_COORD, -150, 6730 }
346 USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI,
347 USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO,
348 USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS,
349 HAS_INTEGRATED_BUTTON,
350 0x84, sizeof(struct bt_data),
351 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
352 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 },
353 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
354 { DIM_X, DIM_X / SN_COORD, -4620, 5140 },
355 { DIM_Y, DIM_Y / SN_COORD, -150, 6600 }
360 /* return the device-specific configuration by device */
361 static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev)
363 u16 id = le16_to_cpu(udev->descriptor.idProduct);
364 const struct bcm5974_config *cfg;
366 for (cfg = bcm5974_config_table; cfg->ansi; ++cfg)
367 if (cfg->ansi == id || cfg->iso == id || cfg->jis == id)
370 return bcm5974_config_table;
373 /* convert 16-bit little endian to signed integer */
374 static inline int raw2int(__le16 x)
376 return (signed short)le16_to_cpu(x);
379 /* scale device data to logical dimensions (asserts devmin < devmax) */
380 static inline int int2scale(const struct bcm5974_param *p, int x)
382 return x * p->dim / (p->devmax - p->devmin);
385 /* all logical value ranges are [0,dim). */
386 static inline int int2bound(const struct bcm5974_param *p, int x)
388 int s = int2scale(p, x);
390 return clamp_val(s, 0, p->dim - 1);
393 /* setup which logical events to report */
394 static void setup_events_to_report(struct input_dev *input_dev,
395 const struct bcm5974_config *cfg)
397 __set_bit(EV_ABS, input_dev->evbit);
399 input_set_abs_params(input_dev, ABS_PRESSURE,
400 0, cfg->p.dim, cfg->p.fuzz, 0);
401 input_set_abs_params(input_dev, ABS_TOOL_WIDTH,
402 0, cfg->w.dim, cfg->w.fuzz, 0);
403 input_set_abs_params(input_dev, ABS_X,
404 0, cfg->x.dim, cfg->x.fuzz, 0);
405 input_set_abs_params(input_dev, ABS_Y,
406 0, cfg->y.dim, cfg->y.fuzz, 0);
408 /* finger touch area */
409 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
410 cfg->w.devmin, cfg->w.devmax, 0, 0);
411 input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR,
412 cfg->w.devmin, cfg->w.devmax, 0, 0);
413 /* finger approach area */
414 input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR,
415 cfg->w.devmin, cfg->w.devmax, 0, 0);
416 input_set_abs_params(input_dev, ABS_MT_WIDTH_MINOR,
417 cfg->w.devmin, cfg->w.devmax, 0, 0);
418 /* finger orientation */
419 input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
420 -MAX_FINGER_ORIENTATION,
421 MAX_FINGER_ORIENTATION, 0, 0);
422 /* finger position */
423 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
424 cfg->x.devmin, cfg->x.devmax, 0, 0);
425 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
426 cfg->y.devmin, cfg->y.devmax, 0, 0);
428 __set_bit(EV_KEY, input_dev->evbit);
429 __set_bit(BTN_TOUCH, input_dev->keybit);
430 __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
431 __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
432 __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
433 __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
434 __set_bit(BTN_LEFT, input_dev->keybit);
436 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
437 if (cfg->caps & HAS_INTEGRATED_BUTTON)
438 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
440 input_set_events_per_packet(input_dev, 60);
443 /* report button data as logical button state */
444 static int report_bt_state(struct bcm5974 *dev, int size)
446 if (size != sizeof(struct bt_data))
450 "bcm5974: button data: %x %x %x %x\n",
451 dev->bt_data->unknown1, dev->bt_data->button,
452 dev->bt_data->rel_x, dev->bt_data->rel_y);
454 input_report_key(dev->input, BTN_LEFT, dev->bt_data->button);
455 input_sync(dev->input);
460 static void report_finger_data(struct input_dev *input,
461 const struct bcm5974_config *cfg,
462 const struct tp_finger *f)
464 input_report_abs(input, ABS_MT_TOUCH_MAJOR,
465 raw2int(f->force_major) << 1);
466 input_report_abs(input, ABS_MT_TOUCH_MINOR,
467 raw2int(f->force_minor) << 1);
468 input_report_abs(input, ABS_MT_WIDTH_MAJOR,
469 raw2int(f->size_major) << 1);
470 input_report_abs(input, ABS_MT_WIDTH_MINOR,
471 raw2int(f->size_minor) << 1);
472 input_report_abs(input, ABS_MT_ORIENTATION,
473 MAX_FINGER_ORIENTATION - raw2int(f->orientation));
474 input_report_abs(input, ABS_MT_POSITION_X, raw2int(f->abs_x));
475 input_report_abs(input, ABS_MT_POSITION_Y,
476 cfg->y.devmin + cfg->y.devmax - raw2int(f->abs_y));
477 input_mt_sync(input);
480 /* report trackpad data as logical trackpad state */
481 static int report_tp_state(struct bcm5974 *dev, int size)
483 const struct bcm5974_config *c = &dev->cfg;
484 const struct tp_finger *f;
485 struct input_dev *input = dev->input;
486 int raw_p, raw_w, raw_x, raw_y, raw_n, i;
487 int ptest, origin, ibt = 0, nmin = 0, nmax = 0;
488 int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0;
490 if (size < c->tp_offset || (size - c->tp_offset) % SIZEOF_FINGER != 0)
493 /* finger data, le16-aligned */
494 f = (const struct tp_finger *)(dev->tp_data + c->tp_offset);
495 raw_n = (size - c->tp_offset) / SIZEOF_FINGER;
497 /* always track the first finger; when detached, start over */
500 /* report raw trackpad data */
501 for (i = 0; i < raw_n; i++)
502 report_finger_data(input, c, &f[i]);
504 raw_p = raw2int(f->force_major);
505 raw_w = raw2int(f->size_major);
506 raw_x = raw2int(f->abs_x);
507 raw_y = raw2int(f->abs_y);
511 "raw: p: %+05d w: %+05d x: %+05d y: %+05d n: %d\n",
512 raw_p, raw_w, raw_x, raw_y, raw_n);
514 ptest = int2bound(&c->p, raw_p);
515 origin = raw2int(f->origin);
517 /* while tracking finger still valid, count all fingers */
518 if (ptest > PRESSURE_LOW && origin) {
520 abs_w = int2bound(&c->w, raw_w);
521 abs_x = int2bound(&c->x, raw_x - c->x.devmin);
522 abs_y = int2bound(&c->y, c->y.devmax - raw_y);
524 ptest = int2bound(&c->p,
525 raw2int(f->force_major));
526 if (ptest > PRESSURE_LOW)
528 if (ptest > PRESSURE_HIGH)
535 /* set the integrated button if applicable */
536 if (c->tp_type == TYPE2)
537 ibt = raw2int(dev->tp_data[BUTTON_TYPE2]);
539 if (dev->fingers < nmin)
541 if (dev->fingers > nmax)
544 input_report_key(input, BTN_TOUCH, dev->fingers > 0);
545 input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1);
546 input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2);
547 input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers == 3);
548 input_report_key(input, BTN_TOOL_QUADTAP, dev->fingers > 3);
550 input_report_abs(input, ABS_PRESSURE, abs_p);
551 input_report_abs(input, ABS_TOOL_WIDTH, abs_w);
554 input_report_abs(input, ABS_X, abs_x);
555 input_report_abs(input, ABS_Y, abs_y);
558 "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d "
559 "nmin: %d nmax: %d n: %d ibt: %d\n", abs_p, abs_w,
560 abs_x, abs_y, nmin, nmax, dev->fingers, ibt);
564 /* type 2 reports button events via ibt only */
565 if (c->tp_type == TYPE2)
566 input_report_key(input, BTN_LEFT, ibt);
573 /* Wellspring initialization constants */
574 #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1
575 #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9
576 #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE 0x300
577 #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX 0
578 #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE 0x01
579 #define BCM5974_WELLSPRING_MODE_NORMAL_VALUE 0x08
581 static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on)
583 char *data = kmalloc(8, GFP_KERNEL);
584 int retval = 0, size;
587 dev_err(&dev->intf->dev, "out of memory\n");
592 /* read configuration */
593 size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
594 BCM5974_WELLSPRING_MODE_READ_REQUEST_ID,
595 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
596 BCM5974_WELLSPRING_MODE_REQUEST_VALUE,
597 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000);
600 dev_err(&dev->intf->dev, "could not read from device\n");
605 /* apply the mode switch */
607 BCM5974_WELLSPRING_MODE_VENDOR_VALUE :
608 BCM5974_WELLSPRING_MODE_NORMAL_VALUE;
610 /* write configuration */
611 size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
612 BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID,
613 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
614 BCM5974_WELLSPRING_MODE_REQUEST_VALUE,
615 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000);
618 dev_err(&dev->intf->dev, "could not write to device\n");
623 dprintk(2, "bcm5974: switched to %s mode.\n",
624 on ? "wellspring" : "normal");
631 static void bcm5974_irq_button(struct urb *urb)
633 struct bcm5974 *dev = urb->context;
634 struct usb_interface *intf = dev->intf;
637 switch (urb->status) {
644 dev_dbg(&intf->dev, "button urb shutting down: %d\n",
648 dev_dbg(&intf->dev, "button urb status: %d\n", urb->status);
652 if (report_bt_state(dev, dev->bt_urb->actual_length))
653 dprintk(1, "bcm5974: bad button package, length: %d\n",
654 dev->bt_urb->actual_length);
657 error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC);
659 dev_err(&intf->dev, "button urb failed: %d\n", error);
662 static void bcm5974_irq_trackpad(struct urb *urb)
664 struct bcm5974 *dev = urb->context;
665 struct usb_interface *intf = dev->intf;
668 switch (urb->status) {
675 dev_dbg(&intf->dev, "trackpad urb shutting down: %d\n",
679 dev_dbg(&intf->dev, "trackpad urb status: %d\n", urb->status);
683 /* control response ignored */
684 if (dev->tp_urb->actual_length == 2)
687 if (report_tp_state(dev, dev->tp_urb->actual_length))
688 dprintk(1, "bcm5974: bad trackpad package, length: %d\n",
689 dev->tp_urb->actual_length);
692 error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC);
694 dev_err(&intf->dev, "trackpad urb failed: %d\n", error);
698 * The Wellspring trackpad, like many recent Apple trackpads, share
699 * the usb device with the keyboard. Since keyboards are usually
700 * handled by the HID system, the device ends up being handled by two
701 * modules. Setting up the device therefore becomes slightly
702 * complicated. To enable multitouch features, a mode switch is
703 * required, which is usually applied via the control interface of the
704 * device. It can be argued where this switch should take place. In
705 * some drivers, like appletouch, the switch is made during
706 * probe. However, the hid module may also alter the state of the
707 * device, resulting in trackpad malfunction under certain
708 * circumstances. To get around this problem, there is at least one
709 * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to
710 * receive a reset_resume request rather than the normal resume.
711 * Since the implementation of reset_resume is equal to mode switch
712 * plus start_traffic, it seems easier to always do the switch when
713 * starting traffic on the device.
715 static int bcm5974_start_traffic(struct bcm5974 *dev)
719 error = bcm5974_wellspring_mode(dev, true);
721 dprintk(1, "bcm5974: mode switch failed\n");
725 error = usb_submit_urb(dev->bt_urb, GFP_KERNEL);
729 error = usb_submit_urb(dev->tp_urb, GFP_KERNEL);
736 usb_kill_urb(dev->bt_urb);
738 bcm5974_wellspring_mode(dev, false);
743 static void bcm5974_pause_traffic(struct bcm5974 *dev)
745 usb_kill_urb(dev->tp_urb);
746 usb_kill_urb(dev->bt_urb);
747 bcm5974_wellspring_mode(dev, false);
751 * The code below implements open/close and manual suspend/resume.
752 * All functions may be called in random order.
754 * Opening a suspended device fails with EACCES - permission denied.
756 * Failing a resume leaves the device resumed but closed.
758 static int bcm5974_open(struct input_dev *input)
760 struct bcm5974 *dev = input_get_drvdata(input);
763 error = usb_autopm_get_interface(dev->intf);
767 mutex_lock(&dev->pm_mutex);
769 error = bcm5974_start_traffic(dev);
773 mutex_unlock(&dev->pm_mutex);
776 usb_autopm_put_interface(dev->intf);
781 static void bcm5974_close(struct input_dev *input)
783 struct bcm5974 *dev = input_get_drvdata(input);
785 mutex_lock(&dev->pm_mutex);
787 bcm5974_pause_traffic(dev);
790 mutex_unlock(&dev->pm_mutex);
792 usb_autopm_put_interface(dev->intf);
795 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message)
797 struct bcm5974 *dev = usb_get_intfdata(iface);
799 mutex_lock(&dev->pm_mutex);
802 bcm5974_pause_traffic(dev);
804 mutex_unlock(&dev->pm_mutex);
809 static int bcm5974_resume(struct usb_interface *iface)
811 struct bcm5974 *dev = usb_get_intfdata(iface);
814 mutex_lock(&dev->pm_mutex);
817 error = bcm5974_start_traffic(dev);
819 mutex_unlock(&dev->pm_mutex);
824 static int bcm5974_probe(struct usb_interface *iface,
825 const struct usb_device_id *id)
827 struct usb_device *udev = interface_to_usbdev(iface);
828 const struct bcm5974_config *cfg;
830 struct input_dev *input_dev;
833 /* find the product index */
834 cfg = bcm5974_get_config(udev);
836 /* allocate memory for our device state and initialize it */
837 dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL);
838 input_dev = input_allocate_device();
839 if (!dev || !input_dev) {
840 dev_err(&iface->dev, "out of memory\n");
846 dev->input = input_dev;
848 mutex_init(&dev->pm_mutex);
851 dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL);
855 dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL);
857 goto err_free_bt_urb;
859 dev->bt_data = usb_alloc_coherent(dev->udev,
860 dev->cfg.bt_datalen, GFP_KERNEL,
861 &dev->bt_urb->transfer_dma);
865 dev->tp_data = usb_alloc_coherent(dev->udev,
866 dev->cfg.tp_datalen, GFP_KERNEL,
867 &dev->tp_urb->transfer_dma);
869 goto err_free_bt_buffer;
871 usb_fill_int_urb(dev->bt_urb, udev,
872 usb_rcvintpipe(udev, cfg->bt_ep),
873 dev->bt_data, dev->cfg.bt_datalen,
874 bcm5974_irq_button, dev, 1);
876 usb_fill_int_urb(dev->tp_urb, udev,
877 usb_rcvintpipe(udev, cfg->tp_ep),
878 dev->tp_data, dev->cfg.tp_datalen,
879 bcm5974_irq_trackpad, dev, 1);
881 /* create bcm5974 device */
882 usb_make_path(udev, dev->phys, sizeof(dev->phys));
883 strlcat(dev->phys, "/input0", sizeof(dev->phys));
885 input_dev->name = "bcm5974";
886 input_dev->phys = dev->phys;
887 usb_to_input_id(dev->udev, &input_dev->id);
888 /* report driver capabilities via the version field */
889 input_dev->id.version = cfg->caps;
890 input_dev->dev.parent = &iface->dev;
892 input_set_drvdata(input_dev, dev);
894 input_dev->open = bcm5974_open;
895 input_dev->close = bcm5974_close;
897 setup_events_to_report(input_dev, cfg);
899 error = input_register_device(dev->input);
901 goto err_free_buffer;
903 /* save our data pointer in this interface device */
904 usb_set_intfdata(iface, dev);
909 usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
910 dev->tp_data, dev->tp_urb->transfer_dma);
912 usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
913 dev->bt_data, dev->bt_urb->transfer_dma);
915 usb_free_urb(dev->tp_urb);
917 usb_free_urb(dev->bt_urb);
919 usb_set_intfdata(iface, NULL);
920 input_free_device(input_dev);
925 static void bcm5974_disconnect(struct usb_interface *iface)
927 struct bcm5974 *dev = usb_get_intfdata(iface);
929 usb_set_intfdata(iface, NULL);
931 input_unregister_device(dev->input);
932 usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
933 dev->tp_data, dev->tp_urb->transfer_dma);
934 usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
935 dev->bt_data, dev->bt_urb->transfer_dma);
936 usb_free_urb(dev->tp_urb);
937 usb_free_urb(dev->bt_urb);
941 static struct usb_driver bcm5974_driver = {
943 .probe = bcm5974_probe,
944 .disconnect = bcm5974_disconnect,
945 .suspend = bcm5974_suspend,
946 .resume = bcm5974_resume,
947 .id_table = bcm5974_table,
948 .supports_autosuspend = 1,
951 module_usb_driver(bcm5974_driver);