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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 | |
6021afcf EH |
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 | |
47340bd9 AB |
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 | |
f89bd95c HR |
70 | |
71 | #define BCM5974_DEVICE(prod) { \ | |
72 | .match_flags = (USB_DEVICE_ID_MATCH_DEVICE | \ | |
73 | USB_DEVICE_ID_MATCH_INT_CLASS | \ | |
74 | USB_DEVICE_ID_MATCH_INT_PROTOCOL), \ | |
75 | .idVendor = USB_VENDOR_ID_APPLE, \ | |
76 | .idProduct = (prod), \ | |
77 | .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ | |
78 | .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE \ | |
79 | } | |
80 | ||
81 | /* table of devices that work with this driver */ | |
158e0fb6 | 82 | static const struct usb_device_id bcm5974_table[] = { |
f89bd95c HR |
83 | /* MacbookAir1.1 */ |
84 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI), | |
85 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO), | |
86 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS), | |
87 | /* MacbookProPenryn */ | |
88 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI), | |
89 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO), | |
90 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS), | |
158e9287 HR |
91 | /* Macbook5,1 */ |
92 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI), | |
93 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ISO), | |
94 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_JIS), | |
6021afcf EH |
95 | /* MacbookAir3,2 */ |
96 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI), | |
97 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ISO), | |
98 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_JIS), | |
99 | /* MacbookAir3,1 */ | |
100 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI), | |
101 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO), | |
102 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS), | |
47340bd9 AB |
103 | /* MacbookPro8 */ |
104 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI), | |
105 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ISO), | |
106 | BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_JIS), | |
f89bd95c HR |
107 | /* Terminating entry */ |
108 | {} | |
109 | }; | |
110 | MODULE_DEVICE_TABLE(usb, bcm5974_table); | |
111 | ||
112 | MODULE_AUTHOR("Henrik Rydberg"); | |
113 | MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver"); | |
114 | MODULE_LICENSE("GPL"); | |
115 | ||
116 | #define dprintk(level, format, a...)\ | |
117 | { if (debug >= level) printk(KERN_DEBUG format, ##a); } | |
118 | ||
119 | static int debug = 1; | |
120 | module_param(debug, int, 0644); | |
121 | MODULE_PARM_DESC(debug, "Activate debugging output"); | |
122 | ||
123 | /* button data structure */ | |
124 | struct bt_data { | |
125 | u8 unknown1; /* constant */ | |
126 | u8 button; /* left button */ | |
127 | u8 rel_x; /* relative x coordinate */ | |
128 | u8 rel_y; /* relative y coordinate */ | |
129 | }; | |
130 | ||
9894cf0f HR |
131 | /* trackpad header types */ |
132 | enum tp_type { | |
158e9287 HR |
133 | TYPE1, /* plain trackpad */ |
134 | TYPE2 /* button integrated in trackpad */ | |
f89bd95c HR |
135 | }; |
136 | ||
9894cf0f HR |
137 | /* trackpad finger data offsets, le16-aligned */ |
138 | #define FINGER_TYPE1 (13 * sizeof(__le16)) | |
158e9287 HR |
139 | #define FINGER_TYPE2 (15 * sizeof(__le16)) |
140 | ||
141 | /* trackpad button data offsets */ | |
142 | #define BUTTON_TYPE2 15 | |
143 | ||
144 | /* list of device capability bits */ | |
145 | #define HAS_INTEGRATED_BUTTON 1 | |
9894cf0f HR |
146 | |
147 | /* trackpad finger structure, le16-aligned */ | |
f89bd95c | 148 | struct tp_finger { |
75e21e3f | 149 | __le16 origin; /* zero when switching track finger */ |
f89bd95c HR |
150 | __le16 abs_x; /* absolute x coodinate */ |
151 | __le16 abs_y; /* absolute y coodinate */ | |
152 | __le16 rel_x; /* relative x coodinate */ | |
153 | __le16 rel_y; /* relative y coodinate */ | |
154 | __le16 size_major; /* finger size, major axis? */ | |
155 | __le16 size_minor; /* finger size, minor axis? */ | |
156 | __le16 orientation; /* 16384 when point, else 15 bit angle */ | |
157 | __le16 force_major; /* trackpad force, major axis? */ | |
158 | __le16 force_minor; /* trackpad force, minor axis? */ | |
159 | __le16 unused[3]; /* zeros */ | |
160 | __le16 multi; /* one finger: varies, more fingers: constant */ | |
9894cf0f | 161 | } __attribute__((packed,aligned(2))); |
f89bd95c | 162 | |
9894cf0f HR |
163 | /* trackpad finger data size, empirically at least ten fingers */ |
164 | #define SIZEOF_FINGER sizeof(struct tp_finger) | |
165 | #define SIZEOF_ALL_FINGERS (16 * SIZEOF_FINGER) | |
6f2701b7 | 166 | #define MAX_FINGER_ORIENTATION 16384 |
f89bd95c HR |
167 | |
168 | /* device-specific parameters */ | |
169 | struct bcm5974_param { | |
170 | int dim; /* logical dimension */ | |
171 | int fuzz; /* logical noise value */ | |
172 | int devmin; /* device minimum reading */ | |
173 | int devmax; /* device maximum reading */ | |
174 | }; | |
175 | ||
176 | /* device-specific configuration */ | |
177 | struct bcm5974_config { | |
178 | int ansi, iso, jis; /* the product id of this device */ | |
158e9287 | 179 | int caps; /* device capability bitmask */ |
f89bd95c HR |
180 | int bt_ep; /* the endpoint of the button interface */ |
181 | int bt_datalen; /* data length of the button interface */ | |
182 | int tp_ep; /* the endpoint of the trackpad interface */ | |
9894cf0f HR |
183 | enum tp_type tp_type; /* type of trackpad interface */ |
184 | int tp_offset; /* offset to trackpad finger data */ | |
f89bd95c HR |
185 | int tp_datalen; /* data length of the trackpad interface */ |
186 | struct bcm5974_param p; /* finger pressure limits */ | |
187 | struct bcm5974_param w; /* finger width limits */ | |
188 | struct bcm5974_param x; /* horizontal limits */ | |
189 | struct bcm5974_param y; /* vertical limits */ | |
190 | }; | |
191 | ||
192 | /* logical device structure */ | |
193 | struct bcm5974 { | |
194 | char phys[64]; | |
195 | struct usb_device *udev; /* usb device */ | |
88da765f | 196 | struct usb_interface *intf; /* our interface */ |
f89bd95c HR |
197 | struct input_dev *input; /* input dev */ |
198 | struct bcm5974_config cfg; /* device configuration */ | |
199 | struct mutex pm_mutex; /* serialize access to open/suspend */ | |
200 | int opened; /* 1: opened, 0: closed */ | |
201 | struct urb *bt_urb; /* button usb request block */ | |
202 | struct bt_data *bt_data; /* button transferred data */ | |
203 | struct urb *tp_urb; /* trackpad usb request block */ | |
9894cf0f | 204 | u8 *tp_data; /* trackpad transferred data */ |
75e21e3f | 205 | int fingers; /* number of fingers on trackpad */ |
f89bd95c HR |
206 | }; |
207 | ||
208 | /* logical dimensions */ | |
209 | #define DIM_PRESSURE 256 /* maximum finger pressure */ | |
210 | #define DIM_WIDTH 16 /* maximum finger width */ | |
211 | #define DIM_X 1280 /* maximum trackpad x value */ | |
212 | #define DIM_Y 800 /* maximum trackpad y value */ | |
213 | ||
214 | /* logical signal quality */ | |
215 | #define SN_PRESSURE 45 /* pressure signal-to-noise ratio */ | |
216 | #define SN_WIDTH 100 /* width signal-to-noise ratio */ | |
217 | #define SN_COORD 250 /* coordinate signal-to-noise ratio */ | |
218 | ||
75e21e3f HR |
219 | /* pressure thresholds */ |
220 | #define PRESSURE_LOW (2 * DIM_PRESSURE / SN_PRESSURE) | |
221 | #define PRESSURE_HIGH (3 * PRESSURE_LOW) | |
222 | ||
f89bd95c HR |
223 | /* device constants */ |
224 | static const struct bcm5974_config bcm5974_config_table[] = { | |
225 | { | |
226 | USB_DEVICE_ID_APPLE_WELLSPRING_ANSI, | |
227 | USB_DEVICE_ID_APPLE_WELLSPRING_ISO, | |
228 | USB_DEVICE_ID_APPLE_WELLSPRING_JIS, | |
158e9287 | 229 | 0, |
f89bd95c | 230 | 0x84, sizeof(struct bt_data), |
9894cf0f | 231 | 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS, |
f89bd95c HR |
232 | { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, |
233 | { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, | |
234 | { DIM_X, DIM_X / SN_COORD, -4824, 5342 }, | |
235 | { DIM_Y, DIM_Y / SN_COORD, -172, 5820 } | |
236 | }, | |
237 | { | |
238 | USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI, | |
239 | USB_DEVICE_ID_APPLE_WELLSPRING2_ISO, | |
240 | USB_DEVICE_ID_APPLE_WELLSPRING2_JIS, | |
158e9287 | 241 | 0, |
f89bd95c | 242 | 0x84, sizeof(struct bt_data), |
9894cf0f | 243 | 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS, |
f89bd95c HR |
244 | { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, |
245 | { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, | |
246 | { DIM_X, DIM_X / SN_COORD, -4824, 4824 }, | |
247 | { DIM_Y, DIM_Y / SN_COORD, -172, 4290 } | |
248 | }, | |
158e9287 HR |
249 | { |
250 | USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI, | |
251 | USB_DEVICE_ID_APPLE_WELLSPRING3_ISO, | |
252 | USB_DEVICE_ID_APPLE_WELLSPRING3_JIS, | |
253 | HAS_INTEGRATED_BUTTON, | |
254 | 0x84, sizeof(struct bt_data), | |
255 | 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS, | |
256 | { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 }, | |
257 | { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, | |
258 | { DIM_X, DIM_X / SN_COORD, -4460, 5166 }, | |
259 | { DIM_Y, DIM_Y / SN_COORD, -75, 6700 } | |
260 | }, | |
6021afcf EH |
261 | { |
262 | USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI, | |
263 | USB_DEVICE_ID_APPLE_WELLSPRING4_ISO, | |
264 | USB_DEVICE_ID_APPLE_WELLSPRING4_JIS, | |
265 | HAS_INTEGRATED_BUTTON, | |
266 | 0x84, sizeof(struct bt_data), | |
267 | 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS, | |
268 | { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 }, | |
269 | { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, | |
270 | { DIM_X, DIM_X / SN_COORD, -4620, 5140 }, | |
271 | { DIM_Y, DIM_Y / SN_COORD, -150, 6600 } | |
272 | }, | |
273 | { | |
274 | USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI, | |
275 | USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO, | |
276 | USB_DEVICE_ID_APPLE_WELLSPRING4A_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, -4616, 5112 }, | |
283 | { DIM_Y, DIM_Y / SN_COORD, -142, 5234 } | |
284 | }, | |
47340bd9 AB |
285 | { |
286 | USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI, | |
287 | USB_DEVICE_ID_APPLE_WELLSPRING5_ISO, | |
288 | USB_DEVICE_ID_APPLE_WELLSPRING5_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, -4415, 5050 }, | |
295 | { DIM_Y, DIM_Y / SN_COORD, -55, 6680 } | |
296 | }, | |
f89bd95c HR |
297 | {} |
298 | }; | |
299 | ||
300 | /* return the device-specific configuration by device */ | |
301 | static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev) | |
302 | { | |
303 | u16 id = le16_to_cpu(udev->descriptor.idProduct); | |
304 | const struct bcm5974_config *cfg; | |
305 | ||
306 | for (cfg = bcm5974_config_table; cfg->ansi; ++cfg) | |
307 | if (cfg->ansi == id || cfg->iso == id || cfg->jis == id) | |
308 | return cfg; | |
309 | ||
310 | return bcm5974_config_table; | |
311 | } | |
312 | ||
313 | /* convert 16-bit little endian to signed integer */ | |
314 | static inline int raw2int(__le16 x) | |
315 | { | |
316 | return (signed short)le16_to_cpu(x); | |
317 | } | |
318 | ||
319 | /* scale device data to logical dimensions (asserts devmin < devmax) */ | |
320 | static inline int int2scale(const struct bcm5974_param *p, int x) | |
321 | { | |
322 | return x * p->dim / (p->devmax - p->devmin); | |
323 | } | |
324 | ||
325 | /* all logical value ranges are [0,dim). */ | |
326 | static inline int int2bound(const struct bcm5974_param *p, int x) | |
327 | { | |
328 | int s = int2scale(p, x); | |
329 | ||
330 | return clamp_val(s, 0, p->dim - 1); | |
331 | } | |
332 | ||
333 | /* setup which logical events to report */ | |
334 | static void setup_events_to_report(struct input_dev *input_dev, | |
335 | const struct bcm5974_config *cfg) | |
336 | { | |
337 | __set_bit(EV_ABS, input_dev->evbit); | |
338 | ||
339 | input_set_abs_params(input_dev, ABS_PRESSURE, | |
340 | 0, cfg->p.dim, cfg->p.fuzz, 0); | |
341 | input_set_abs_params(input_dev, ABS_TOOL_WIDTH, | |
342 | 0, cfg->w.dim, cfg->w.fuzz, 0); | |
343 | input_set_abs_params(input_dev, ABS_X, | |
344 | 0, cfg->x.dim, cfg->x.fuzz, 0); | |
345 | input_set_abs_params(input_dev, ABS_Y, | |
346 | 0, cfg->y.dim, cfg->y.fuzz, 0); | |
347 | ||
6f2701b7 HR |
348 | /* finger touch area */ |
349 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, | |
350 | cfg->w.devmin, cfg->w.devmax, 0, 0); | |
351 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, | |
352 | cfg->w.devmin, cfg->w.devmax, 0, 0); | |
353 | /* finger approach area */ | |
354 | input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, | |
355 | cfg->w.devmin, cfg->w.devmax, 0, 0); | |
356 | input_set_abs_params(input_dev, ABS_MT_WIDTH_MINOR, | |
357 | cfg->w.devmin, cfg->w.devmax, 0, 0); | |
358 | /* finger orientation */ | |
359 | input_set_abs_params(input_dev, ABS_MT_ORIENTATION, | |
360 | -MAX_FINGER_ORIENTATION, | |
361 | MAX_FINGER_ORIENTATION, 0, 0); | |
362 | /* finger position */ | |
363 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, | |
364 | cfg->x.devmin, cfg->x.devmax, 0, 0); | |
365 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, | |
366 | cfg->y.devmin, cfg->y.devmax, 0, 0); | |
367 | ||
f89bd95c | 368 | __set_bit(EV_KEY, input_dev->evbit); |
a6821f34 | 369 | __set_bit(BTN_TOUCH, input_dev->keybit); |
f89bd95c HR |
370 | __set_bit(BTN_TOOL_FINGER, input_dev->keybit); |
371 | __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); | |
372 | __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); | |
6916d97f | 373 | __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit); |
f89bd95c | 374 | __set_bit(BTN_LEFT, input_dev->keybit); |
c13aea03 HR |
375 | |
376 | input_set_events_per_packet(input_dev, 60); | |
f89bd95c HR |
377 | } |
378 | ||
379 | /* report button data as logical button state */ | |
380 | static int report_bt_state(struct bcm5974 *dev, int size) | |
381 | { | |
382 | if (size != sizeof(struct bt_data)) | |
383 | return -EIO; | |
384 | ||
53402193 HR |
385 | dprintk(7, |
386 | "bcm5974: button data: %x %x %x %x\n", | |
387 | dev->bt_data->unknown1, dev->bt_data->button, | |
388 | dev->bt_data->rel_x, dev->bt_data->rel_y); | |
389 | ||
f89bd95c HR |
390 | input_report_key(dev->input, BTN_LEFT, dev->bt_data->button); |
391 | input_sync(dev->input); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
6f2701b7 HR |
396 | static void report_finger_data(struct input_dev *input, |
397 | const struct bcm5974_config *cfg, | |
398 | const struct tp_finger *f) | |
399 | { | |
57157bec HR |
400 | input_report_abs(input, ABS_MT_TOUCH_MAJOR, |
401 | raw2int(f->force_major) << 1); | |
402 | input_report_abs(input, ABS_MT_TOUCH_MINOR, | |
403 | raw2int(f->force_minor) << 1); | |
404 | input_report_abs(input, ABS_MT_WIDTH_MAJOR, | |
405 | raw2int(f->size_major) << 1); | |
406 | input_report_abs(input, ABS_MT_WIDTH_MINOR, | |
407 | raw2int(f->size_minor) << 1); | |
6f2701b7 HR |
408 | input_report_abs(input, ABS_MT_ORIENTATION, |
409 | MAX_FINGER_ORIENTATION - raw2int(f->orientation)); | |
410 | input_report_abs(input, ABS_MT_POSITION_X, raw2int(f->abs_x)); | |
411 | input_report_abs(input, ABS_MT_POSITION_Y, | |
412 | cfg->y.devmin + cfg->y.devmax - raw2int(f->abs_y)); | |
413 | input_mt_sync(input); | |
414 | } | |
415 | ||
f89bd95c HR |
416 | /* report trackpad data as logical trackpad state */ |
417 | static int report_tp_state(struct bcm5974 *dev, int size) | |
418 | { | |
419 | const struct bcm5974_config *c = &dev->cfg; | |
9894cf0f | 420 | const struct tp_finger *f; |
f89bd95c | 421 | struct input_dev *input = dev->input; |
6f2701b7 | 422 | int raw_p, raw_w, raw_x, raw_y, raw_n, i; |
9de48cc3 | 423 | int ptest, origin, ibt = 0, nmin = 0, nmax = 0; |
75e21e3f | 424 | int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0; |
f89bd95c | 425 | |
9894cf0f | 426 | if (size < c->tp_offset || (size - c->tp_offset) % SIZEOF_FINGER != 0) |
f89bd95c HR |
427 | return -EIO; |
428 | ||
9894cf0f HR |
429 | /* finger data, le16-aligned */ |
430 | f = (const struct tp_finger *)(dev->tp_data + c->tp_offset); | |
431 | raw_n = (size - c->tp_offset) / SIZEOF_FINGER; | |
432 | ||
75e21e3f | 433 | /* always track the first finger; when detached, start over */ |
9894cf0f | 434 | if (raw_n) { |
6f2701b7 HR |
435 | |
436 | /* report raw trackpad data */ | |
437 | for (i = 0; i < raw_n; i++) | |
438 | report_finger_data(input, c, &f[i]); | |
439 | ||
75e21e3f HR |
440 | raw_p = raw2int(f->force_major); |
441 | raw_w = raw2int(f->size_major); | |
442 | raw_x = raw2int(f->abs_x); | |
443 | raw_y = raw2int(f->abs_y); | |
f89bd95c HR |
444 | |
445 | dprintk(9, | |
53402193 HR |
446 | "bcm5974: " |
447 | "raw: p: %+05d w: %+05d x: %+05d y: %+05d n: %d\n", | |
448 | raw_p, raw_w, raw_x, raw_y, raw_n); | |
75e21e3f HR |
449 | |
450 | ptest = int2bound(&c->p, raw_p); | |
451 | origin = raw2int(f->origin); | |
158e9287 | 452 | |
9de48cc3 HR |
453 | /* while tracking finger still valid, count all fingers */ |
454 | if (ptest > PRESSURE_LOW && origin) { | |
455 | abs_p = ptest; | |
456 | abs_w = int2bound(&c->w, raw_w); | |
457 | abs_x = int2bound(&c->x, raw_x - c->x.devmin); | |
458 | abs_y = int2bound(&c->y, c->y.devmax - raw_y); | |
459 | while (raw_n--) { | |
460 | ptest = int2bound(&c->p, | |
461 | raw2int(f->force_major)); | |
462 | if (ptest > PRESSURE_LOW) | |
463 | nmax++; | |
464 | if (ptest > PRESSURE_HIGH) | |
465 | nmin++; | |
466 | f++; | |
467 | } | |
75e21e3f | 468 | } |
f89bd95c HR |
469 | } |
470 | ||
50635115 HR |
471 | /* set the integrated button if applicable */ |
472 | if (c->tp_type == TYPE2) | |
473 | ibt = raw2int(dev->tp_data[BUTTON_TYPE2]); | |
474 | ||
75e21e3f HR |
475 | if (dev->fingers < nmin) |
476 | dev->fingers = nmin; | |
477 | if (dev->fingers > nmax) | |
478 | dev->fingers = nmax; | |
479 | ||
a6821f34 | 480 | input_report_key(input, BTN_TOUCH, dev->fingers > 0); |
75e21e3f HR |
481 | input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1); |
482 | input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2); | |
6916d97f HR |
483 | input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers == 3); |
484 | input_report_key(input, BTN_TOOL_QUADTAP, dev->fingers > 3); | |
f89bd95c | 485 | |
75e21e3f HR |
486 | input_report_abs(input, ABS_PRESSURE, abs_p); |
487 | input_report_abs(input, ABS_TOOL_WIDTH, abs_w); | |
488 | ||
489 | if (abs_p) { | |
490 | input_report_abs(input, ABS_X, abs_x); | |
491 | input_report_abs(input, ABS_Y, abs_y); | |
492 | ||
493 | dprintk(8, | |
494 | "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d " | |
53402193 HR |
495 | "nmin: %d nmax: %d n: %d ibt: %d\n", abs_p, abs_w, |
496 | abs_x, abs_y, nmin, nmax, dev->fingers, ibt); | |
75e21e3f HR |
497 | |
498 | } | |
f89bd95c | 499 | |
158e9287 HR |
500 | /* type 2 reports button events via ibt only */ |
501 | if (c->tp_type == TYPE2) | |
502 | input_report_key(input, BTN_LEFT, ibt); | |
503 | ||
f89bd95c HR |
504 | input_sync(input); |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | /* Wellspring initialization constants */ | |
510 | #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1 | |
511 | #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9 | |
512 | #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE 0x300 | |
513 | #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX 0 | |
514 | #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE 0x01 | |
cd72ad3f | 515 | #define BCM5974_WELLSPRING_MODE_NORMAL_VALUE 0x08 |
f89bd95c | 516 | |
cd72ad3f | 517 | static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on) |
f89bd95c HR |
518 | { |
519 | char *data = kmalloc(8, GFP_KERNEL); | |
520 | int retval = 0, size; | |
521 | ||
522 | if (!data) { | |
523 | err("bcm5974: out of memory"); | |
524 | retval = -ENOMEM; | |
525 | goto out; | |
526 | } | |
527 | ||
528 | /* read configuration */ | |
529 | size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), | |
530 | BCM5974_WELLSPRING_MODE_READ_REQUEST_ID, | |
531 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
532 | BCM5974_WELLSPRING_MODE_REQUEST_VALUE, | |
533 | BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); | |
534 | ||
535 | if (size != 8) { | |
536 | err("bcm5974: could not read from device"); | |
537 | retval = -EIO; | |
538 | goto out; | |
539 | } | |
540 | ||
541 | /* apply the mode switch */ | |
cd72ad3f HR |
542 | data[0] = on ? |
543 | BCM5974_WELLSPRING_MODE_VENDOR_VALUE : | |
544 | BCM5974_WELLSPRING_MODE_NORMAL_VALUE; | |
f89bd95c HR |
545 | |
546 | /* write configuration */ | |
547 | size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
548 | BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID, | |
549 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
550 | BCM5974_WELLSPRING_MODE_REQUEST_VALUE, | |
551 | BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); | |
552 | ||
553 | if (size != 8) { | |
554 | err("bcm5974: could not write to device"); | |
555 | retval = -EIO; | |
556 | goto out; | |
557 | } | |
558 | ||
cd72ad3f HR |
559 | dprintk(2, "bcm5974: switched to %s mode.\n", |
560 | on ? "wellspring" : "normal"); | |
f89bd95c HR |
561 | |
562 | out: | |
563 | kfree(data); | |
564 | return retval; | |
565 | } | |
566 | ||
567 | static void bcm5974_irq_button(struct urb *urb) | |
568 | { | |
569 | struct bcm5974 *dev = urb->context; | |
570 | int error; | |
571 | ||
572 | switch (urb->status) { | |
573 | case 0: | |
574 | break; | |
575 | case -EOVERFLOW: | |
576 | case -ECONNRESET: | |
577 | case -ENOENT: | |
578 | case -ESHUTDOWN: | |
579 | dbg("bcm5974: button urb shutting down: %d", urb->status); | |
580 | return; | |
581 | default: | |
582 | dbg("bcm5974: button urb status: %d", urb->status); | |
583 | goto exit; | |
584 | } | |
585 | ||
586 | if (report_bt_state(dev, dev->bt_urb->actual_length)) | |
587 | dprintk(1, "bcm5974: bad button package, length: %d\n", | |
588 | dev->bt_urb->actual_length); | |
589 | ||
590 | exit: | |
591 | error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC); | |
592 | if (error) | |
593 | err("bcm5974: button urb failed: %d", error); | |
594 | } | |
595 | ||
596 | static void bcm5974_irq_trackpad(struct urb *urb) | |
597 | { | |
598 | struct bcm5974 *dev = urb->context; | |
599 | int error; | |
600 | ||
601 | switch (urb->status) { | |
602 | case 0: | |
603 | break; | |
604 | case -EOVERFLOW: | |
605 | case -ECONNRESET: | |
606 | case -ENOENT: | |
607 | case -ESHUTDOWN: | |
608 | dbg("bcm5974: trackpad urb shutting down: %d", urb->status); | |
609 | return; | |
610 | default: | |
611 | dbg("bcm5974: trackpad urb status: %d", urb->status); | |
612 | goto exit; | |
613 | } | |
614 | ||
615 | /* control response ignored */ | |
616 | if (dev->tp_urb->actual_length == 2) | |
617 | goto exit; | |
618 | ||
619 | if (report_tp_state(dev, dev->tp_urb->actual_length)) | |
620 | dprintk(1, "bcm5974: bad trackpad package, length: %d\n", | |
621 | dev->tp_urb->actual_length); | |
622 | ||
623 | exit: | |
624 | error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC); | |
625 | if (error) | |
626 | err("bcm5974: trackpad urb failed: %d", error); | |
627 | } | |
628 | ||
629 | /* | |
630 | * The Wellspring trackpad, like many recent Apple trackpads, share | |
631 | * the usb device with the keyboard. Since keyboards are usually | |
632 | * handled by the HID system, the device ends up being handled by two | |
633 | * modules. Setting up the device therefore becomes slightly | |
634 | * complicated. To enable multitouch features, a mode switch is | |
635 | * required, which is usually applied via the control interface of the | |
636 | * device. It can be argued where this switch should take place. In | |
637 | * some drivers, like appletouch, the switch is made during | |
638 | * probe. However, the hid module may also alter the state of the | |
639 | * device, resulting in trackpad malfunction under certain | |
640 | * circumstances. To get around this problem, there is at least one | |
641 | * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to | |
25985edc | 642 | * receive a reset_resume request rather than the normal resume. |
f89bd95c HR |
643 | * Since the implementation of reset_resume is equal to mode switch |
644 | * plus start_traffic, it seems easier to always do the switch when | |
645 | * starting traffic on the device. | |
646 | */ | |
647 | static int bcm5974_start_traffic(struct bcm5974 *dev) | |
648 | { | |
1719ec41 LJ |
649 | int error; |
650 | ||
651 | error = bcm5974_wellspring_mode(dev, true); | |
652 | if (error) { | |
f89bd95c | 653 | dprintk(1, "bcm5974: mode switch failed\n"); |
1719ec41 | 654 | goto err_out; |
f89bd95c HR |
655 | } |
656 | ||
1719ec41 LJ |
657 | error = usb_submit_urb(dev->bt_urb, GFP_KERNEL); |
658 | if (error) | |
659 | goto err_reset_mode; | |
f89bd95c | 660 | |
1719ec41 LJ |
661 | error = usb_submit_urb(dev->tp_urb, GFP_KERNEL); |
662 | if (error) | |
f89bd95c HR |
663 | goto err_kill_bt; |
664 | ||
665 | return 0; | |
666 | ||
667 | err_kill_bt: | |
668 | usb_kill_urb(dev->bt_urb); | |
1719ec41 LJ |
669 | err_reset_mode: |
670 | bcm5974_wellspring_mode(dev, false); | |
671 | err_out: | |
672 | return error; | |
f89bd95c HR |
673 | } |
674 | ||
675 | static void bcm5974_pause_traffic(struct bcm5974 *dev) | |
676 | { | |
677 | usb_kill_urb(dev->tp_urb); | |
678 | usb_kill_urb(dev->bt_urb); | |
cd72ad3f | 679 | bcm5974_wellspring_mode(dev, false); |
f89bd95c HR |
680 | } |
681 | ||
682 | /* | |
683 | * The code below implements open/close and manual suspend/resume. | |
684 | * All functions may be called in random order. | |
685 | * | |
686 | * Opening a suspended device fails with EACCES - permission denied. | |
687 | * | |
688 | * Failing a resume leaves the device resumed but closed. | |
689 | */ | |
690 | static int bcm5974_open(struct input_dev *input) | |
691 | { | |
692 | struct bcm5974 *dev = input_get_drvdata(input); | |
693 | int error; | |
694 | ||
88da765f DT |
695 | error = usb_autopm_get_interface(dev->intf); |
696 | if (error) | |
697 | return error; | |
698 | ||
f89bd95c HR |
699 | mutex_lock(&dev->pm_mutex); |
700 | ||
701 | error = bcm5974_start_traffic(dev); | |
702 | if (!error) | |
703 | dev->opened = 1; | |
704 | ||
705 | mutex_unlock(&dev->pm_mutex); | |
706 | ||
88da765f DT |
707 | if (error) |
708 | usb_autopm_put_interface(dev->intf); | |
709 | ||
f89bd95c HR |
710 | return error; |
711 | } | |
712 | ||
713 | static void bcm5974_close(struct input_dev *input) | |
714 | { | |
715 | struct bcm5974 *dev = input_get_drvdata(input); | |
716 | ||
717 | mutex_lock(&dev->pm_mutex); | |
718 | ||
719 | bcm5974_pause_traffic(dev); | |
720 | dev->opened = 0; | |
721 | ||
722 | mutex_unlock(&dev->pm_mutex); | |
88da765f DT |
723 | |
724 | usb_autopm_put_interface(dev->intf); | |
f89bd95c HR |
725 | } |
726 | ||
727 | static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message) | |
728 | { | |
729 | struct bcm5974 *dev = usb_get_intfdata(iface); | |
730 | ||
731 | mutex_lock(&dev->pm_mutex); | |
732 | ||
733 | if (dev->opened) | |
734 | bcm5974_pause_traffic(dev); | |
735 | ||
736 | mutex_unlock(&dev->pm_mutex); | |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
741 | static int bcm5974_resume(struct usb_interface *iface) | |
742 | { | |
743 | struct bcm5974 *dev = usb_get_intfdata(iface); | |
744 | int error = 0; | |
745 | ||
746 | mutex_lock(&dev->pm_mutex); | |
747 | ||
748 | if (dev->opened) | |
749 | error = bcm5974_start_traffic(dev); | |
750 | ||
751 | mutex_unlock(&dev->pm_mutex); | |
752 | ||
753 | return error; | |
754 | } | |
755 | ||
756 | static int bcm5974_probe(struct usb_interface *iface, | |
757 | const struct usb_device_id *id) | |
758 | { | |
759 | struct usb_device *udev = interface_to_usbdev(iface); | |
760 | const struct bcm5974_config *cfg; | |
761 | struct bcm5974 *dev; | |
762 | struct input_dev *input_dev; | |
763 | int error = -ENOMEM; | |
764 | ||
765 | /* find the product index */ | |
766 | cfg = bcm5974_get_config(udev); | |
767 | ||
768 | /* allocate memory for our device state and initialize it */ | |
769 | dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL); | |
770 | input_dev = input_allocate_device(); | |
771 | if (!dev || !input_dev) { | |
772 | err("bcm5974: out of memory"); | |
773 | goto err_free_devs; | |
774 | } | |
775 | ||
776 | dev->udev = udev; | |
88da765f | 777 | dev->intf = iface; |
f89bd95c HR |
778 | dev->input = input_dev; |
779 | dev->cfg = *cfg; | |
780 | mutex_init(&dev->pm_mutex); | |
781 | ||
782 | /* setup urbs */ | |
783 | dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL); | |
784 | if (!dev->bt_urb) | |
785 | goto err_free_devs; | |
786 | ||
787 | dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL); | |
788 | if (!dev->tp_urb) | |
789 | goto err_free_bt_urb; | |
790 | ||
997ea58e DM |
791 | dev->bt_data = usb_alloc_coherent(dev->udev, |
792 | dev->cfg.bt_datalen, GFP_KERNEL, | |
793 | &dev->bt_urb->transfer_dma); | |
f89bd95c HR |
794 | if (!dev->bt_data) |
795 | goto err_free_urb; | |
796 | ||
997ea58e DM |
797 | dev->tp_data = usb_alloc_coherent(dev->udev, |
798 | dev->cfg.tp_datalen, GFP_KERNEL, | |
799 | &dev->tp_urb->transfer_dma); | |
f89bd95c HR |
800 | if (!dev->tp_data) |
801 | goto err_free_bt_buffer; | |
802 | ||
803 | usb_fill_int_urb(dev->bt_urb, udev, | |
804 | usb_rcvintpipe(udev, cfg->bt_ep), | |
805 | dev->bt_data, dev->cfg.bt_datalen, | |
806 | bcm5974_irq_button, dev, 1); | |
807 | ||
808 | usb_fill_int_urb(dev->tp_urb, udev, | |
809 | usb_rcvintpipe(udev, cfg->tp_ep), | |
810 | dev->tp_data, dev->cfg.tp_datalen, | |
811 | bcm5974_irq_trackpad, dev, 1); | |
812 | ||
813 | /* create bcm5974 device */ | |
814 | usb_make_path(udev, dev->phys, sizeof(dev->phys)); | |
815 | strlcat(dev->phys, "/input0", sizeof(dev->phys)); | |
816 | ||
817 | input_dev->name = "bcm5974"; | |
818 | input_dev->phys = dev->phys; | |
819 | usb_to_input_id(dev->udev, &input_dev->id); | |
158e9287 HR |
820 | /* report driver capabilities via the version field */ |
821 | input_dev->id.version = cfg->caps; | |
f89bd95c HR |
822 | input_dev->dev.parent = &iface->dev; |
823 | ||
824 | input_set_drvdata(input_dev, dev); | |
825 | ||
826 | input_dev->open = bcm5974_open; | |
827 | input_dev->close = bcm5974_close; | |
828 | ||
829 | setup_events_to_report(input_dev, cfg); | |
830 | ||
831 | error = input_register_device(dev->input); | |
832 | if (error) | |
833 | goto err_free_buffer; | |
834 | ||
835 | /* save our data pointer in this interface device */ | |
836 | usb_set_intfdata(iface, dev); | |
837 | ||
838 | return 0; | |
839 | ||
840 | err_free_buffer: | |
997ea58e | 841 | usb_free_coherent(dev->udev, dev->cfg.tp_datalen, |
f89bd95c HR |
842 | dev->tp_data, dev->tp_urb->transfer_dma); |
843 | err_free_bt_buffer: | |
997ea58e | 844 | usb_free_coherent(dev->udev, dev->cfg.bt_datalen, |
f89bd95c HR |
845 | dev->bt_data, dev->bt_urb->transfer_dma); |
846 | err_free_urb: | |
847 | usb_free_urb(dev->tp_urb); | |
848 | err_free_bt_urb: | |
849 | usb_free_urb(dev->bt_urb); | |
850 | err_free_devs: | |
851 | usb_set_intfdata(iface, NULL); | |
852 | input_free_device(input_dev); | |
853 | kfree(dev); | |
854 | return error; | |
855 | } | |
856 | ||
857 | static void bcm5974_disconnect(struct usb_interface *iface) | |
858 | { | |
859 | struct bcm5974 *dev = usb_get_intfdata(iface); | |
860 | ||
861 | usb_set_intfdata(iface, NULL); | |
862 | ||
863 | input_unregister_device(dev->input); | |
997ea58e DM |
864 | usb_free_coherent(dev->udev, dev->cfg.tp_datalen, |
865 | dev->tp_data, dev->tp_urb->transfer_dma); | |
866 | usb_free_coherent(dev->udev, dev->cfg.bt_datalen, | |
867 | dev->bt_data, dev->bt_urb->transfer_dma); | |
f89bd95c HR |
868 | usb_free_urb(dev->tp_urb); |
869 | usb_free_urb(dev->bt_urb); | |
870 | kfree(dev); | |
871 | } | |
872 | ||
873 | static struct usb_driver bcm5974_driver = { | |
874 | .name = "bcm5974", | |
875 | .probe = bcm5974_probe, | |
876 | .disconnect = bcm5974_disconnect, | |
877 | .suspend = bcm5974_suspend, | |
878 | .resume = bcm5974_resume, | |
f89bd95c | 879 | .id_table = bcm5974_table, |
88da765f | 880 | .supports_autosuspend = 1, |
f89bd95c HR |
881 | }; |
882 | ||
883 | static int __init bcm5974_init(void) | |
884 | { | |
885 | return usb_register(&bcm5974_driver); | |
886 | } | |
887 | ||
888 | static void __exit bcm5974_exit(void) | |
889 | { | |
890 | usb_deregister(&bcm5974_driver); | |
891 | } | |
892 | ||
893 | module_init(bcm5974_init); | |
894 | module_exit(bcm5974_exit); | |
895 |