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f89bd95c HR |
1 | /* |
2 | * Apple USB BCM5974 (Macbook Air and Penryn Macbook Pro) multitouch driver | |
3 | * | |
4 | * Copyright (C) 2008 Henrik Rydberg (rydberg@euromail.se) | |
5 | * | |
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) | |
9 | * | |
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) | |
18 | * | |
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. | |
23 | * | |
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. | |
28 | * | |
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. | |
32 | * | |
33 | */ | |
34 | ||
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> | |
43 | ||
44 | #define USB_VENDOR_ID_APPLE 0x05ac | |
45 | ||
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 | |
158e9287 HR |
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 | |
f89bd95c HR |
58 | |
59 | #define BCM5974_DEVICE(prod) { \ | |
60 | .match_flags = (USB_DEVICE_ID_MATCH_DEVICE | \ | |
61 | USB_DEVICE_ID_MATCH_INT_CLASS | \ | |
62 | USB_DEVICE_ID_MATCH_INT_PROTOCOL), \ | |
63 | .idVendor = USB_VENDOR_ID_APPLE, \ | |
64 | .idProduct = (prod), \ | |
65 | .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ | |
66 | .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE \ | |
67 | } | |
68 | ||
69 | /* table of devices that work with this driver */ | |
158e0fb6 | 70 | static const struct usb_device_id bcm5974_table[] = { |
f89bd95c HR |
71 | /* MacbookAir1.1 */ |
72 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI), | |
73 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO), | |
74 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS), | |
75 | /* MacbookProPenryn */ | |
76 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI), | |
77 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO), | |
78 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS), | |
158e9287 HR |
79 | /* Macbook5,1 */ |
80 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI), | |
81 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ISO), | |
82 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_JIS), | |
f89bd95c HR |
83 | /* Terminating entry */ |
84 | {} | |
85 | }; | |
86 | MODULE_DEVICE_TABLE(usb, bcm5974_table); | |
87 | ||
88 | MODULE_AUTHOR("Henrik Rydberg"); | |
89 | MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver"); | |
90 | MODULE_LICENSE("GPL"); | |
91 | ||
92 | #define dprintk(level, format, a...)\ | |
93 | { if (debug >= level) printk(KERN_DEBUG format, ##a); } | |
94 | ||
95 | static int debug = 1; | |
96 | module_param(debug, int, 0644); | |
97 | MODULE_PARM_DESC(debug, "Activate debugging output"); | |
98 | ||
99 | /* button data structure */ | |
100 | struct bt_data { | |
101 | u8 unknown1; /* constant */ | |
102 | u8 button; /* left button */ | |
103 | u8 rel_x; /* relative x coordinate */ | |
104 | u8 rel_y; /* relative y coordinate */ | |
105 | }; | |
106 | ||
9894cf0f HR |
107 | /* trackpad header types */ |
108 | enum tp_type { | |
158e9287 HR |
109 | TYPE1, /* plain trackpad */ |
110 | TYPE2 /* button integrated in trackpad */ | |
f89bd95c HR |
111 | }; |
112 | ||
9894cf0f HR |
113 | /* trackpad finger data offsets, le16-aligned */ |
114 | #define FINGER_TYPE1 (13 * sizeof(__le16)) | |
158e9287 HR |
115 | #define FINGER_TYPE2 (15 * sizeof(__le16)) |
116 | ||
117 | /* trackpad button data offsets */ | |
118 | #define BUTTON_TYPE2 15 | |
119 | ||
120 | /* list of device capability bits */ | |
121 | #define HAS_INTEGRATED_BUTTON 1 | |
9894cf0f HR |
122 | |
123 | /* trackpad finger structure, le16-aligned */ | |
f89bd95c | 124 | struct tp_finger { |
75e21e3f | 125 | __le16 origin; /* zero when switching track finger */ |
f89bd95c HR |
126 | __le16 abs_x; /* absolute x coodinate */ |
127 | __le16 abs_y; /* absolute y coodinate */ | |
128 | __le16 rel_x; /* relative x coodinate */ | |
129 | __le16 rel_y; /* relative y coodinate */ | |
130 | __le16 size_major; /* finger size, major axis? */ | |
131 | __le16 size_minor; /* finger size, minor axis? */ | |
132 | __le16 orientation; /* 16384 when point, else 15 bit angle */ | |
133 | __le16 force_major; /* trackpad force, major axis? */ | |
134 | __le16 force_minor; /* trackpad force, minor axis? */ | |
135 | __le16 unused[3]; /* zeros */ | |
136 | __le16 multi; /* one finger: varies, more fingers: constant */ | |
9894cf0f | 137 | } __attribute__((packed,aligned(2))); |
f89bd95c | 138 | |
9894cf0f HR |
139 | /* trackpad finger data size, empirically at least ten fingers */ |
140 | #define SIZEOF_FINGER sizeof(struct tp_finger) | |
141 | #define SIZEOF_ALL_FINGERS (16 * SIZEOF_FINGER) | |
6f2701b7 | 142 | #define MAX_FINGER_ORIENTATION 16384 |
f89bd95c HR |
143 | |
144 | /* device-specific parameters */ | |
145 | struct bcm5974_param { | |
146 | int dim; /* logical dimension */ | |
147 | int fuzz; /* logical noise value */ | |
148 | int devmin; /* device minimum reading */ | |
149 | int devmax; /* device maximum reading */ | |
150 | }; | |
151 | ||
152 | /* device-specific configuration */ | |
153 | struct bcm5974_config { | |
154 | int ansi, iso, jis; /* the product id of this device */ | |
158e9287 | 155 | int caps; /* device capability bitmask */ |
f89bd95c HR |
156 | int bt_ep; /* the endpoint of the button interface */ |
157 | int bt_datalen; /* data length of the button interface */ | |
158 | int tp_ep; /* the endpoint of the trackpad interface */ | |
9894cf0f HR |
159 | enum tp_type tp_type; /* type of trackpad interface */ |
160 | int tp_offset; /* offset to trackpad finger data */ | |
f89bd95c HR |
161 | int tp_datalen; /* data length of the trackpad interface */ |
162 | struct bcm5974_param p; /* finger pressure limits */ | |
163 | struct bcm5974_param w; /* finger width limits */ | |
164 | struct bcm5974_param x; /* horizontal limits */ | |
165 | struct bcm5974_param y; /* vertical limits */ | |
166 | }; | |
167 | ||
168 | /* logical device structure */ | |
169 | struct bcm5974 { | |
170 | char phys[64]; | |
171 | struct usb_device *udev; /* usb device */ | |
88da765f | 172 | struct usb_interface *intf; /* our interface */ |
f89bd95c HR |
173 | struct input_dev *input; /* input dev */ |
174 | struct bcm5974_config cfg; /* device configuration */ | |
175 | struct mutex pm_mutex; /* serialize access to open/suspend */ | |
176 | int opened; /* 1: opened, 0: closed */ | |
177 | struct urb *bt_urb; /* button usb request block */ | |
178 | struct bt_data *bt_data; /* button transferred data */ | |
179 | struct urb *tp_urb; /* trackpad usb request block */ | |
9894cf0f | 180 | u8 *tp_data; /* trackpad transferred data */ |
75e21e3f | 181 | int fingers; /* number of fingers on trackpad */ |
f89bd95c HR |
182 | }; |
183 | ||
184 | /* logical dimensions */ | |
185 | #define DIM_PRESSURE 256 /* maximum finger pressure */ | |
186 | #define DIM_WIDTH 16 /* maximum finger width */ | |
187 | #define DIM_X 1280 /* maximum trackpad x value */ | |
188 | #define DIM_Y 800 /* maximum trackpad y value */ | |
189 | ||
190 | /* logical signal quality */ | |
191 | #define SN_PRESSURE 45 /* pressure signal-to-noise ratio */ | |
192 | #define SN_WIDTH 100 /* width signal-to-noise ratio */ | |
193 | #define SN_COORD 250 /* coordinate signal-to-noise ratio */ | |
194 | ||
75e21e3f HR |
195 | /* pressure thresholds */ |
196 | #define PRESSURE_LOW (2 * DIM_PRESSURE / SN_PRESSURE) | |
197 | #define PRESSURE_HIGH (3 * PRESSURE_LOW) | |
198 | ||
f89bd95c HR |
199 | /* device constants */ |
200 | static const struct bcm5974_config bcm5974_config_table[] = { | |
201 | { | |
202 | USB_DEVICE_ID_APPLE_WELLSPRING_ANSI, | |
203 | USB_DEVICE_ID_APPLE_WELLSPRING_ISO, | |
204 | USB_DEVICE_ID_APPLE_WELLSPRING_JIS, | |
158e9287 | 205 | 0, |
f89bd95c | 206 | 0x84, sizeof(struct bt_data), |
9894cf0f | 207 | 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS, |
f89bd95c HR |
208 | { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, |
209 | { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, | |
210 | { DIM_X, DIM_X / SN_COORD, -4824, 5342 }, | |
211 | { DIM_Y, DIM_Y / SN_COORD, -172, 5820 } | |
212 | }, | |
213 | { | |
214 | USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI, | |
215 | USB_DEVICE_ID_APPLE_WELLSPRING2_ISO, | |
216 | USB_DEVICE_ID_APPLE_WELLSPRING2_JIS, | |
158e9287 | 217 | 0, |
f89bd95c | 218 | 0x84, sizeof(struct bt_data), |
9894cf0f | 219 | 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS, |
f89bd95c HR |
220 | { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, |
221 | { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, | |
222 | { DIM_X, DIM_X / SN_COORD, -4824, 4824 }, | |
223 | { DIM_Y, DIM_Y / SN_COORD, -172, 4290 } | |
224 | }, | |
158e9287 HR |
225 | { |
226 | USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI, | |
227 | USB_DEVICE_ID_APPLE_WELLSPRING3_ISO, | |
228 | USB_DEVICE_ID_APPLE_WELLSPRING3_JIS, | |
229 | HAS_INTEGRATED_BUTTON, | |
230 | 0x84, sizeof(struct bt_data), | |
231 | 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS, | |
232 | { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 }, | |
233 | { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, | |
234 | { DIM_X, DIM_X / SN_COORD, -4460, 5166 }, | |
235 | { DIM_Y, DIM_Y / SN_COORD, -75, 6700 } | |
236 | }, | |
f89bd95c HR |
237 | {} |
238 | }; | |
239 | ||
240 | /* return the device-specific configuration by device */ | |
241 | static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev) | |
242 | { | |
243 | u16 id = le16_to_cpu(udev->descriptor.idProduct); | |
244 | const struct bcm5974_config *cfg; | |
245 | ||
246 | for (cfg = bcm5974_config_table; cfg->ansi; ++cfg) | |
247 | if (cfg->ansi == id || cfg->iso == id || cfg->jis == id) | |
248 | return cfg; | |
249 | ||
250 | return bcm5974_config_table; | |
251 | } | |
252 | ||
253 | /* convert 16-bit little endian to signed integer */ | |
254 | static inline int raw2int(__le16 x) | |
255 | { | |
256 | return (signed short)le16_to_cpu(x); | |
257 | } | |
258 | ||
259 | /* scale device data to logical dimensions (asserts devmin < devmax) */ | |
260 | static inline int int2scale(const struct bcm5974_param *p, int x) | |
261 | { | |
262 | return x * p->dim / (p->devmax - p->devmin); | |
263 | } | |
264 | ||
265 | /* all logical value ranges are [0,dim). */ | |
266 | static inline int int2bound(const struct bcm5974_param *p, int x) | |
267 | { | |
268 | int s = int2scale(p, x); | |
269 | ||
270 | return clamp_val(s, 0, p->dim - 1); | |
271 | } | |
272 | ||
273 | /* setup which logical events to report */ | |
274 | static void setup_events_to_report(struct input_dev *input_dev, | |
275 | const struct bcm5974_config *cfg) | |
276 | { | |
277 | __set_bit(EV_ABS, input_dev->evbit); | |
278 | ||
279 | input_set_abs_params(input_dev, ABS_PRESSURE, | |
280 | 0, cfg->p.dim, cfg->p.fuzz, 0); | |
281 | input_set_abs_params(input_dev, ABS_TOOL_WIDTH, | |
282 | 0, cfg->w.dim, cfg->w.fuzz, 0); | |
283 | input_set_abs_params(input_dev, ABS_X, | |
284 | 0, cfg->x.dim, cfg->x.fuzz, 0); | |
285 | input_set_abs_params(input_dev, ABS_Y, | |
286 | 0, cfg->y.dim, cfg->y.fuzz, 0); | |
287 | ||
6f2701b7 HR |
288 | /* finger touch area */ |
289 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, | |
290 | cfg->w.devmin, cfg->w.devmax, 0, 0); | |
291 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, | |
292 | cfg->w.devmin, cfg->w.devmax, 0, 0); | |
293 | /* finger approach area */ | |
294 | input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, | |
295 | cfg->w.devmin, cfg->w.devmax, 0, 0); | |
296 | input_set_abs_params(input_dev, ABS_MT_WIDTH_MINOR, | |
297 | cfg->w.devmin, cfg->w.devmax, 0, 0); | |
298 | /* finger orientation */ | |
299 | input_set_abs_params(input_dev, ABS_MT_ORIENTATION, | |
300 | -MAX_FINGER_ORIENTATION, | |
301 | MAX_FINGER_ORIENTATION, 0, 0); | |
302 | /* finger position */ | |
303 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, | |
304 | cfg->x.devmin, cfg->x.devmax, 0, 0); | |
305 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, | |
306 | cfg->y.devmin, cfg->y.devmax, 0, 0); | |
307 | ||
f89bd95c | 308 | __set_bit(EV_KEY, input_dev->evbit); |
a6821f34 | 309 | __set_bit(BTN_TOUCH, input_dev->keybit); |
f89bd95c HR |
310 | __set_bit(BTN_TOOL_FINGER, input_dev->keybit); |
311 | __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); | |
312 | __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); | |
6916d97f | 313 | __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit); |
f89bd95c | 314 | __set_bit(BTN_LEFT, input_dev->keybit); |
c13aea03 HR |
315 | |
316 | input_set_events_per_packet(input_dev, 60); | |
f89bd95c HR |
317 | } |
318 | ||
319 | /* report button data as logical button state */ | |
320 | static int report_bt_state(struct bcm5974 *dev, int size) | |
321 | { | |
322 | if (size != sizeof(struct bt_data)) | |
323 | return -EIO; | |
324 | ||
53402193 HR |
325 | dprintk(7, |
326 | "bcm5974: button data: %x %x %x %x\n", | |
327 | dev->bt_data->unknown1, dev->bt_data->button, | |
328 | dev->bt_data->rel_x, dev->bt_data->rel_y); | |
329 | ||
f89bd95c HR |
330 | input_report_key(dev->input, BTN_LEFT, dev->bt_data->button); |
331 | input_sync(dev->input); | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
6f2701b7 HR |
336 | static void report_finger_data(struct input_dev *input, |
337 | const struct bcm5974_config *cfg, | |
338 | const struct tp_finger *f) | |
339 | { | |
57157bec HR |
340 | input_report_abs(input, ABS_MT_TOUCH_MAJOR, |
341 | raw2int(f->force_major) << 1); | |
342 | input_report_abs(input, ABS_MT_TOUCH_MINOR, | |
343 | raw2int(f->force_minor) << 1); | |
344 | input_report_abs(input, ABS_MT_WIDTH_MAJOR, | |
345 | raw2int(f->size_major) << 1); | |
346 | input_report_abs(input, ABS_MT_WIDTH_MINOR, | |
347 | raw2int(f->size_minor) << 1); | |
6f2701b7 HR |
348 | input_report_abs(input, ABS_MT_ORIENTATION, |
349 | MAX_FINGER_ORIENTATION - raw2int(f->orientation)); | |
350 | input_report_abs(input, ABS_MT_POSITION_X, raw2int(f->abs_x)); | |
351 | input_report_abs(input, ABS_MT_POSITION_Y, | |
352 | cfg->y.devmin + cfg->y.devmax - raw2int(f->abs_y)); | |
353 | input_mt_sync(input); | |
354 | } | |
355 | ||
f89bd95c HR |
356 | /* report trackpad data as logical trackpad state */ |
357 | static int report_tp_state(struct bcm5974 *dev, int size) | |
358 | { | |
359 | const struct bcm5974_config *c = &dev->cfg; | |
9894cf0f | 360 | const struct tp_finger *f; |
f89bd95c | 361 | struct input_dev *input = dev->input; |
6f2701b7 | 362 | int raw_p, raw_w, raw_x, raw_y, raw_n, i; |
9de48cc3 | 363 | int ptest, origin, ibt = 0, nmin = 0, nmax = 0; |
75e21e3f | 364 | int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0; |
f89bd95c | 365 | |
9894cf0f | 366 | if (size < c->tp_offset || (size - c->tp_offset) % SIZEOF_FINGER != 0) |
f89bd95c HR |
367 | return -EIO; |
368 | ||
9894cf0f HR |
369 | /* finger data, le16-aligned */ |
370 | f = (const struct tp_finger *)(dev->tp_data + c->tp_offset); | |
371 | raw_n = (size - c->tp_offset) / SIZEOF_FINGER; | |
372 | ||
75e21e3f | 373 | /* always track the first finger; when detached, start over */ |
9894cf0f | 374 | if (raw_n) { |
6f2701b7 HR |
375 | |
376 | /* report raw trackpad data */ | |
377 | for (i = 0; i < raw_n; i++) | |
378 | report_finger_data(input, c, &f[i]); | |
379 | ||
75e21e3f HR |
380 | raw_p = raw2int(f->force_major); |
381 | raw_w = raw2int(f->size_major); | |
382 | raw_x = raw2int(f->abs_x); | |
383 | raw_y = raw2int(f->abs_y); | |
f89bd95c HR |
384 | |
385 | dprintk(9, | |
53402193 HR |
386 | "bcm5974: " |
387 | "raw: p: %+05d w: %+05d x: %+05d y: %+05d n: %d\n", | |
388 | raw_p, raw_w, raw_x, raw_y, raw_n); | |
75e21e3f HR |
389 | |
390 | ptest = int2bound(&c->p, raw_p); | |
391 | origin = raw2int(f->origin); | |
158e9287 HR |
392 | |
393 | /* set the integrated button if applicable */ | |
394 | if (c->tp_type == TYPE2) | |
395 | ibt = raw2int(dev->tp_data[BUTTON_TYPE2]); | |
f89bd95c | 396 | |
9de48cc3 HR |
397 | /* while tracking finger still valid, count all fingers */ |
398 | if (ptest > PRESSURE_LOW && origin) { | |
399 | abs_p = ptest; | |
400 | abs_w = int2bound(&c->w, raw_w); | |
401 | abs_x = int2bound(&c->x, raw_x - c->x.devmin); | |
402 | abs_y = int2bound(&c->y, c->y.devmax - raw_y); | |
403 | while (raw_n--) { | |
404 | ptest = int2bound(&c->p, | |
405 | raw2int(f->force_major)); | |
406 | if (ptest > PRESSURE_LOW) | |
407 | nmax++; | |
408 | if (ptest > PRESSURE_HIGH) | |
409 | nmin++; | |
410 | f++; | |
411 | } | |
75e21e3f | 412 | } |
f89bd95c HR |
413 | } |
414 | ||
75e21e3f HR |
415 | if (dev->fingers < nmin) |
416 | dev->fingers = nmin; | |
417 | if (dev->fingers > nmax) | |
418 | dev->fingers = nmax; | |
419 | ||
a6821f34 | 420 | input_report_key(input, BTN_TOUCH, dev->fingers > 0); |
75e21e3f HR |
421 | input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1); |
422 | input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2); | |
6916d97f HR |
423 | input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers == 3); |
424 | input_report_key(input, BTN_TOOL_QUADTAP, dev->fingers > 3); | |
f89bd95c | 425 | |
75e21e3f HR |
426 | input_report_abs(input, ABS_PRESSURE, abs_p); |
427 | input_report_abs(input, ABS_TOOL_WIDTH, abs_w); | |
428 | ||
429 | if (abs_p) { | |
430 | input_report_abs(input, ABS_X, abs_x); | |
431 | input_report_abs(input, ABS_Y, abs_y); | |
432 | ||
433 | dprintk(8, | |
434 | "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d " | |
53402193 HR |
435 | "nmin: %d nmax: %d n: %d ibt: %d\n", abs_p, abs_w, |
436 | abs_x, abs_y, nmin, nmax, dev->fingers, ibt); | |
75e21e3f HR |
437 | |
438 | } | |
f89bd95c | 439 | |
158e9287 HR |
440 | /* type 2 reports button events via ibt only */ |
441 | if (c->tp_type == TYPE2) | |
442 | input_report_key(input, BTN_LEFT, ibt); | |
443 | ||
f89bd95c HR |
444 | input_sync(input); |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | /* Wellspring initialization constants */ | |
450 | #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1 | |
451 | #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9 | |
452 | #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE 0x300 | |
453 | #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX 0 | |
454 | #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE 0x01 | |
cd72ad3f | 455 | #define BCM5974_WELLSPRING_MODE_NORMAL_VALUE 0x08 |
f89bd95c | 456 | |
cd72ad3f | 457 | static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on) |
f89bd95c HR |
458 | { |
459 | char *data = kmalloc(8, GFP_KERNEL); | |
460 | int retval = 0, size; | |
461 | ||
462 | if (!data) { | |
463 | err("bcm5974: out of memory"); | |
464 | retval = -ENOMEM; | |
465 | goto out; | |
466 | } | |
467 | ||
468 | /* read configuration */ | |
469 | size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), | |
470 | BCM5974_WELLSPRING_MODE_READ_REQUEST_ID, | |
471 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
472 | BCM5974_WELLSPRING_MODE_REQUEST_VALUE, | |
473 | BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); | |
474 | ||
475 | if (size != 8) { | |
476 | err("bcm5974: could not read from device"); | |
477 | retval = -EIO; | |
478 | goto out; | |
479 | } | |
480 | ||
481 | /* apply the mode switch */ | |
cd72ad3f HR |
482 | data[0] = on ? |
483 | BCM5974_WELLSPRING_MODE_VENDOR_VALUE : | |
484 | BCM5974_WELLSPRING_MODE_NORMAL_VALUE; | |
f89bd95c HR |
485 | |
486 | /* write configuration */ | |
487 | size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
488 | BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID, | |
489 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
490 | BCM5974_WELLSPRING_MODE_REQUEST_VALUE, | |
491 | BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); | |
492 | ||
493 | if (size != 8) { | |
494 | err("bcm5974: could not write to device"); | |
495 | retval = -EIO; | |
496 | goto out; | |
497 | } | |
498 | ||
cd72ad3f HR |
499 | dprintk(2, "bcm5974: switched to %s mode.\n", |
500 | on ? "wellspring" : "normal"); | |
f89bd95c HR |
501 | |
502 | out: | |
503 | kfree(data); | |
504 | return retval; | |
505 | } | |
506 | ||
507 | static void bcm5974_irq_button(struct urb *urb) | |
508 | { | |
509 | struct bcm5974 *dev = urb->context; | |
510 | int error; | |
511 | ||
512 | switch (urb->status) { | |
513 | case 0: | |
514 | break; | |
515 | case -EOVERFLOW: | |
516 | case -ECONNRESET: | |
517 | case -ENOENT: | |
518 | case -ESHUTDOWN: | |
519 | dbg("bcm5974: button urb shutting down: %d", urb->status); | |
520 | return; | |
521 | default: | |
522 | dbg("bcm5974: button urb status: %d", urb->status); | |
523 | goto exit; | |
524 | } | |
525 | ||
526 | if (report_bt_state(dev, dev->bt_urb->actual_length)) | |
527 | dprintk(1, "bcm5974: bad button package, length: %d\n", | |
528 | dev->bt_urb->actual_length); | |
529 | ||
530 | exit: | |
531 | error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC); | |
532 | if (error) | |
533 | err("bcm5974: button urb failed: %d", error); | |
534 | } | |
535 | ||
536 | static void bcm5974_irq_trackpad(struct urb *urb) | |
537 | { | |
538 | struct bcm5974 *dev = urb->context; | |
539 | int error; | |
540 | ||
541 | switch (urb->status) { | |
542 | case 0: | |
543 | break; | |
544 | case -EOVERFLOW: | |
545 | case -ECONNRESET: | |
546 | case -ENOENT: | |
547 | case -ESHUTDOWN: | |
548 | dbg("bcm5974: trackpad urb shutting down: %d", urb->status); | |
549 | return; | |
550 | default: | |
551 | dbg("bcm5974: trackpad urb status: %d", urb->status); | |
552 | goto exit; | |
553 | } | |
554 | ||
555 | /* control response ignored */ | |
556 | if (dev->tp_urb->actual_length == 2) | |
557 | goto exit; | |
558 | ||
559 | if (report_tp_state(dev, dev->tp_urb->actual_length)) | |
560 | dprintk(1, "bcm5974: bad trackpad package, length: %d\n", | |
561 | dev->tp_urb->actual_length); | |
562 | ||
563 | exit: | |
564 | error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC); | |
565 | if (error) | |
566 | err("bcm5974: trackpad urb failed: %d", error); | |
567 | } | |
568 | ||
569 | /* | |
570 | * The Wellspring trackpad, like many recent Apple trackpads, share | |
571 | * the usb device with the keyboard. Since keyboards are usually | |
572 | * handled by the HID system, the device ends up being handled by two | |
573 | * modules. Setting up the device therefore becomes slightly | |
574 | * complicated. To enable multitouch features, a mode switch is | |
575 | * required, which is usually applied via the control interface of the | |
576 | * device. It can be argued where this switch should take place. In | |
577 | * some drivers, like appletouch, the switch is made during | |
578 | * probe. However, the hid module may also alter the state of the | |
579 | * device, resulting in trackpad malfunction under certain | |
580 | * circumstances. To get around this problem, there is at least one | |
581 | * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to | |
582 | * recieve a reset_resume request rather than the normal resume. | |
583 | * Since the implementation of reset_resume is equal to mode switch | |
584 | * plus start_traffic, it seems easier to always do the switch when | |
585 | * starting traffic on the device. | |
586 | */ | |
587 | static int bcm5974_start_traffic(struct bcm5974 *dev) | |
588 | { | |
1719ec41 LJ |
589 | int error; |
590 | ||
591 | error = bcm5974_wellspring_mode(dev, true); | |
592 | if (error) { | |
f89bd95c | 593 | dprintk(1, "bcm5974: mode switch failed\n"); |
1719ec41 | 594 | goto err_out; |
f89bd95c HR |
595 | } |
596 | ||
1719ec41 LJ |
597 | error = usb_submit_urb(dev->bt_urb, GFP_KERNEL); |
598 | if (error) | |
599 | goto err_reset_mode; | |
f89bd95c | 600 | |
1719ec41 LJ |
601 | error = usb_submit_urb(dev->tp_urb, GFP_KERNEL); |
602 | if (error) | |
f89bd95c HR |
603 | goto err_kill_bt; |
604 | ||
605 | return 0; | |
606 | ||
607 | err_kill_bt: | |
608 | usb_kill_urb(dev->bt_urb); | |
1719ec41 LJ |
609 | err_reset_mode: |
610 | bcm5974_wellspring_mode(dev, false); | |
611 | err_out: | |
612 | return error; | |
f89bd95c HR |
613 | } |
614 | ||
615 | static void bcm5974_pause_traffic(struct bcm5974 *dev) | |
616 | { | |
617 | usb_kill_urb(dev->tp_urb); | |
618 | usb_kill_urb(dev->bt_urb); | |
cd72ad3f | 619 | bcm5974_wellspring_mode(dev, false); |
f89bd95c HR |
620 | } |
621 | ||
622 | /* | |
623 | * The code below implements open/close and manual suspend/resume. | |
624 | * All functions may be called in random order. | |
625 | * | |
626 | * Opening a suspended device fails with EACCES - permission denied. | |
627 | * | |
628 | * Failing a resume leaves the device resumed but closed. | |
629 | */ | |
630 | static int bcm5974_open(struct input_dev *input) | |
631 | { | |
632 | struct bcm5974 *dev = input_get_drvdata(input); | |
633 | int error; | |
634 | ||
88da765f DT |
635 | error = usb_autopm_get_interface(dev->intf); |
636 | if (error) | |
637 | return error; | |
638 | ||
f89bd95c HR |
639 | mutex_lock(&dev->pm_mutex); |
640 | ||
641 | error = bcm5974_start_traffic(dev); | |
642 | if (!error) | |
643 | dev->opened = 1; | |
644 | ||
645 | mutex_unlock(&dev->pm_mutex); | |
646 | ||
88da765f DT |
647 | if (error) |
648 | usb_autopm_put_interface(dev->intf); | |
649 | ||
f89bd95c HR |
650 | return error; |
651 | } | |
652 | ||
653 | static void bcm5974_close(struct input_dev *input) | |
654 | { | |
655 | struct bcm5974 *dev = input_get_drvdata(input); | |
656 | ||
657 | mutex_lock(&dev->pm_mutex); | |
658 | ||
659 | bcm5974_pause_traffic(dev); | |
660 | dev->opened = 0; | |
661 | ||
662 | mutex_unlock(&dev->pm_mutex); | |
88da765f DT |
663 | |
664 | usb_autopm_put_interface(dev->intf); | |
f89bd95c HR |
665 | } |
666 | ||
667 | static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message) | |
668 | { | |
669 | struct bcm5974 *dev = usb_get_intfdata(iface); | |
670 | ||
671 | mutex_lock(&dev->pm_mutex); | |
672 | ||
673 | if (dev->opened) | |
674 | bcm5974_pause_traffic(dev); | |
675 | ||
676 | mutex_unlock(&dev->pm_mutex); | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | static int bcm5974_resume(struct usb_interface *iface) | |
682 | { | |
683 | struct bcm5974 *dev = usb_get_intfdata(iface); | |
684 | int error = 0; | |
685 | ||
686 | mutex_lock(&dev->pm_mutex); | |
687 | ||
688 | if (dev->opened) | |
689 | error = bcm5974_start_traffic(dev); | |
690 | ||
691 | mutex_unlock(&dev->pm_mutex); | |
692 | ||
693 | return error; | |
694 | } | |
695 | ||
696 | static int bcm5974_probe(struct usb_interface *iface, | |
697 | const struct usb_device_id *id) | |
698 | { | |
699 | struct usb_device *udev = interface_to_usbdev(iface); | |
700 | const struct bcm5974_config *cfg; | |
701 | struct bcm5974 *dev; | |
702 | struct input_dev *input_dev; | |
703 | int error = -ENOMEM; | |
704 | ||
705 | /* find the product index */ | |
706 | cfg = bcm5974_get_config(udev); | |
707 | ||
708 | /* allocate memory for our device state and initialize it */ | |
709 | dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL); | |
710 | input_dev = input_allocate_device(); | |
711 | if (!dev || !input_dev) { | |
712 | err("bcm5974: out of memory"); | |
713 | goto err_free_devs; | |
714 | } | |
715 | ||
716 | dev->udev = udev; | |
88da765f | 717 | dev->intf = iface; |
f89bd95c HR |
718 | dev->input = input_dev; |
719 | dev->cfg = *cfg; | |
720 | mutex_init(&dev->pm_mutex); | |
721 | ||
722 | /* setup urbs */ | |
723 | dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL); | |
724 | if (!dev->bt_urb) | |
725 | goto err_free_devs; | |
726 | ||
727 | dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL); | |
728 | if (!dev->tp_urb) | |
729 | goto err_free_bt_urb; | |
730 | ||
997ea58e DM |
731 | dev->bt_data = usb_alloc_coherent(dev->udev, |
732 | dev->cfg.bt_datalen, GFP_KERNEL, | |
733 | &dev->bt_urb->transfer_dma); | |
f89bd95c HR |
734 | if (!dev->bt_data) |
735 | goto err_free_urb; | |
736 | ||
997ea58e DM |
737 | dev->tp_data = usb_alloc_coherent(dev->udev, |
738 | dev->cfg.tp_datalen, GFP_KERNEL, | |
739 | &dev->tp_urb->transfer_dma); | |
f89bd95c HR |
740 | if (!dev->tp_data) |
741 | goto err_free_bt_buffer; | |
742 | ||
743 | usb_fill_int_urb(dev->bt_urb, udev, | |
744 | usb_rcvintpipe(udev, cfg->bt_ep), | |
745 | dev->bt_data, dev->cfg.bt_datalen, | |
746 | bcm5974_irq_button, dev, 1); | |
747 | ||
748 | usb_fill_int_urb(dev->tp_urb, udev, | |
749 | usb_rcvintpipe(udev, cfg->tp_ep), | |
750 | dev->tp_data, dev->cfg.tp_datalen, | |
751 | bcm5974_irq_trackpad, dev, 1); | |
752 | ||
753 | /* create bcm5974 device */ | |
754 | usb_make_path(udev, dev->phys, sizeof(dev->phys)); | |
755 | strlcat(dev->phys, "/input0", sizeof(dev->phys)); | |
756 | ||
757 | input_dev->name = "bcm5974"; | |
758 | input_dev->phys = dev->phys; | |
759 | usb_to_input_id(dev->udev, &input_dev->id); | |
158e9287 HR |
760 | /* report driver capabilities via the version field */ |
761 | input_dev->id.version = cfg->caps; | |
f89bd95c HR |
762 | input_dev->dev.parent = &iface->dev; |
763 | ||
764 | input_set_drvdata(input_dev, dev); | |
765 | ||
766 | input_dev->open = bcm5974_open; | |
767 | input_dev->close = bcm5974_close; | |
768 | ||
769 | setup_events_to_report(input_dev, cfg); | |
770 | ||
771 | error = input_register_device(dev->input); | |
772 | if (error) | |
773 | goto err_free_buffer; | |
774 | ||
775 | /* save our data pointer in this interface device */ | |
776 | usb_set_intfdata(iface, dev); | |
777 | ||
778 | return 0; | |
779 | ||
780 | err_free_buffer: | |
997ea58e | 781 | usb_free_coherent(dev->udev, dev->cfg.tp_datalen, |
f89bd95c HR |
782 | dev->tp_data, dev->tp_urb->transfer_dma); |
783 | err_free_bt_buffer: | |
997ea58e | 784 | usb_free_coherent(dev->udev, dev->cfg.bt_datalen, |
f89bd95c HR |
785 | dev->bt_data, dev->bt_urb->transfer_dma); |
786 | err_free_urb: | |
787 | usb_free_urb(dev->tp_urb); | |
788 | err_free_bt_urb: | |
789 | usb_free_urb(dev->bt_urb); | |
790 | err_free_devs: | |
791 | usb_set_intfdata(iface, NULL); | |
792 | input_free_device(input_dev); | |
793 | kfree(dev); | |
794 | return error; | |
795 | } | |
796 | ||
797 | static void bcm5974_disconnect(struct usb_interface *iface) | |
798 | { | |
799 | struct bcm5974 *dev = usb_get_intfdata(iface); | |
800 | ||
801 | usb_set_intfdata(iface, NULL); | |
802 | ||
803 | input_unregister_device(dev->input); | |
997ea58e DM |
804 | usb_free_coherent(dev->udev, dev->cfg.tp_datalen, |
805 | dev->tp_data, dev->tp_urb->transfer_dma); | |
806 | usb_free_coherent(dev->udev, dev->cfg.bt_datalen, | |
807 | dev->bt_data, dev->bt_urb->transfer_dma); | |
f89bd95c HR |
808 | usb_free_urb(dev->tp_urb); |
809 | usb_free_urb(dev->bt_urb); | |
810 | kfree(dev); | |
811 | } | |
812 | ||
813 | static struct usb_driver bcm5974_driver = { | |
814 | .name = "bcm5974", | |
815 | .probe = bcm5974_probe, | |
816 | .disconnect = bcm5974_disconnect, | |
817 | .suspend = bcm5974_suspend, | |
818 | .resume = bcm5974_resume, | |
f89bd95c | 819 | .id_table = bcm5974_table, |
88da765f | 820 | .supports_autosuspend = 1, |
f89bd95c HR |
821 | }; |
822 | ||
823 | static int __init bcm5974_init(void) | |
824 | { | |
825 | return usb_register(&bcm5974_driver); | |
826 | } | |
827 | ||
828 | static void __exit bcm5974_exit(void) | |
829 | { | |
830 | usb_deregister(&bcm5974_driver); | |
831 | } | |
832 | ||
833 | module_init(bcm5974_init); | |
834 | module_exit(bcm5974_exit); | |
835 |