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
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 \
69 /* table of devices that work with this driver */
70 static const struct usb_device_id bcm5974_table[] = {
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),
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),
83 /* Terminating entry */
86 MODULE_DEVICE_TABLE(usb, bcm5974_table);
88 MODULE_AUTHOR("Henrik Rydberg");
89 MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver");
90 MODULE_LICENSE("GPL");
92 #define dprintk(level, format, a...)\
93 { if (debug >= level) printk(KERN_DEBUG format, ##a); }
96 module_param(debug, int, 0644);
97 MODULE_PARM_DESC(debug, "Activate debugging output");
99 /* button data structure */
101 u8 unknown1; /* constant */
102 u8 button; /* left button */
103 u8 rel_x; /* relative x coordinate */
104 u8 rel_y; /* relative y coordinate */
107 /* trackpad header types */
109 TYPE1, /* plain trackpad */
110 TYPE2 /* button integrated in trackpad */
113 /* trackpad finger data offsets, le16-aligned */
114 #define FINGER_TYPE1 (13 * sizeof(__le16))
115 #define FINGER_TYPE2 (15 * sizeof(__le16))
117 /* trackpad button data offsets */
118 #define BUTTON_TYPE2 15
120 /* list of device capability bits */
121 #define HAS_INTEGRATED_BUTTON 1
123 /* trackpad finger structure, le16-aligned */
125 __le16 origin; /* zero when switching track finger */
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 */
137 } __attribute__((packed,aligned(2)));
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)
142 #define MAX_FINGER_ORIENTATION 16384
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 */
152 /* device-specific configuration */
153 struct bcm5974_config {
154 int ansi, iso, jis; /* the product id of this device */
155 int caps; /* device capability bitmask */
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 */
159 enum tp_type tp_type; /* type of trackpad interface */
160 int tp_offset; /* offset to trackpad finger data */
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 */
168 /* logical device structure */
171 struct usb_device *udev; /* usb device */
172 struct usb_interface *intf; /* our interface */
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 */
180 u8 *tp_data; /* trackpad transferred data */
181 int fingers; /* number of fingers on trackpad */
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 */
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 */
195 /* pressure thresholds */
196 #define PRESSURE_LOW (2 * DIM_PRESSURE / SN_PRESSURE)
197 #define PRESSURE_HIGH (3 * PRESSURE_LOW)
199 /* device constants */
200 static const struct bcm5974_config bcm5974_config_table[] = {
202 USB_DEVICE_ID_APPLE_WELLSPRING_ANSI,
203 USB_DEVICE_ID_APPLE_WELLSPRING_ISO,
204 USB_DEVICE_ID_APPLE_WELLSPRING_JIS,
206 0x84, sizeof(struct bt_data),
207 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS,
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 }
214 USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI,
215 USB_DEVICE_ID_APPLE_WELLSPRING2_ISO,
216 USB_DEVICE_ID_APPLE_WELLSPRING2_JIS,
218 0x84, sizeof(struct bt_data),
219 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS,
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 }
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 }
240 /* return the device-specific configuration by device */
241 static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev)
243 u16 id = le16_to_cpu(udev->descriptor.idProduct);
244 const struct bcm5974_config *cfg;
246 for (cfg = bcm5974_config_table; cfg->ansi; ++cfg)
247 if (cfg->ansi == id || cfg->iso == id || cfg->jis == id)
250 return bcm5974_config_table;
253 /* convert 16-bit little endian to signed integer */
254 static inline int raw2int(__le16 x)
256 return (signed short)le16_to_cpu(x);
259 /* scale device data to logical dimensions (asserts devmin < devmax) */
260 static inline int int2scale(const struct bcm5974_param *p, int x)
262 return x * p->dim / (p->devmax - p->devmin);
265 /* all logical value ranges are [0,dim). */
266 static inline int int2bound(const struct bcm5974_param *p, int x)
268 int s = int2scale(p, x);
270 return clamp_val(s, 0, p->dim - 1);
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)
277 __set_bit(EV_ABS, input_dev->evbit);
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);
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);
308 __set_bit(EV_KEY, input_dev->evbit);
309 __set_bit(BTN_TOUCH, input_dev->keybit);
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);
313 __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
314 __set_bit(BTN_LEFT, input_dev->keybit);
316 input_set_events_per_packet(input_dev, 60);
319 /* report button data as logical button state */
320 static int report_bt_state(struct bcm5974 *dev, int size)
322 if (size != sizeof(struct bt_data))
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);
330 input_report_key(dev->input, BTN_LEFT, dev->bt_data->button);
331 input_sync(dev->input);
336 static void report_finger_data(struct input_dev *input,
337 const struct bcm5974_config *cfg,
338 const struct tp_finger *f)
340 input_report_abs(input, ABS_MT_TOUCH_MAJOR, raw2int(f->force_major));
341 input_report_abs(input, ABS_MT_TOUCH_MINOR, raw2int(f->force_minor));
342 input_report_abs(input, ABS_MT_WIDTH_MAJOR, raw2int(f->size_major));
343 input_report_abs(input, ABS_MT_WIDTH_MINOR, raw2int(f->size_minor));
344 input_report_abs(input, ABS_MT_ORIENTATION,
345 MAX_FINGER_ORIENTATION - raw2int(f->orientation));
346 input_report_abs(input, ABS_MT_POSITION_X, raw2int(f->abs_x));
347 input_report_abs(input, ABS_MT_POSITION_Y,
348 cfg->y.devmin + cfg->y.devmax - raw2int(f->abs_y));
349 input_mt_sync(input);
352 /* report trackpad data as logical trackpad state */
353 static int report_tp_state(struct bcm5974 *dev, int size)
355 const struct bcm5974_config *c = &dev->cfg;
356 const struct tp_finger *f;
357 struct input_dev *input = dev->input;
358 int raw_p, raw_w, raw_x, raw_y, raw_n, i;
359 int ptest, origin, ibt = 0, nmin = 0, nmax = 0;
360 int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0;
362 if (size < c->tp_offset || (size - c->tp_offset) % SIZEOF_FINGER != 0)
365 /* finger data, le16-aligned */
366 f = (const struct tp_finger *)(dev->tp_data + c->tp_offset);
367 raw_n = (size - c->tp_offset) / SIZEOF_FINGER;
369 /* always track the first finger; when detached, start over */
372 /* report raw trackpad data */
373 for (i = 0; i < raw_n; i++)
374 report_finger_data(input, c, &f[i]);
376 raw_p = raw2int(f->force_major);
377 raw_w = raw2int(f->size_major);
378 raw_x = raw2int(f->abs_x);
379 raw_y = raw2int(f->abs_y);
383 "raw: p: %+05d w: %+05d x: %+05d y: %+05d n: %d\n",
384 raw_p, raw_w, raw_x, raw_y, raw_n);
386 ptest = int2bound(&c->p, raw_p);
387 origin = raw2int(f->origin);
389 /* set the integrated button if applicable */
390 if (c->tp_type == TYPE2)
391 ibt = raw2int(dev->tp_data[BUTTON_TYPE2]);
393 /* while tracking finger still valid, count all fingers */
394 if (ptest > PRESSURE_LOW && origin) {
396 abs_w = int2bound(&c->w, raw_w);
397 abs_x = int2bound(&c->x, raw_x - c->x.devmin);
398 abs_y = int2bound(&c->y, c->y.devmax - raw_y);
400 ptest = int2bound(&c->p,
401 raw2int(f->force_major));
402 if (ptest > PRESSURE_LOW)
404 if (ptest > PRESSURE_HIGH)
411 if (dev->fingers < nmin)
413 if (dev->fingers > nmax)
416 input_report_key(input, BTN_TOUCH, dev->fingers > 0);
417 input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1);
418 input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2);
419 input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers == 3);
420 input_report_key(input, BTN_TOOL_QUADTAP, dev->fingers > 3);
422 input_report_abs(input, ABS_PRESSURE, abs_p);
423 input_report_abs(input, ABS_TOOL_WIDTH, abs_w);
426 input_report_abs(input, ABS_X, abs_x);
427 input_report_abs(input, ABS_Y, abs_y);
430 "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d "
431 "nmin: %d nmax: %d n: %d ibt: %d\n", abs_p, abs_w,
432 abs_x, abs_y, nmin, nmax, dev->fingers, ibt);
436 /* type 2 reports button events via ibt only */
437 if (c->tp_type == TYPE2)
438 input_report_key(input, BTN_LEFT, ibt);
445 /* Wellspring initialization constants */
446 #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1
447 #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9
448 #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE 0x300
449 #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX 0
450 #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE 0x01
451 #define BCM5974_WELLSPRING_MODE_NORMAL_VALUE 0x08
453 static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on)
455 char *data = kmalloc(8, GFP_KERNEL);
456 int retval = 0, size;
459 err("bcm5974: out of memory");
464 /* read configuration */
465 size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
466 BCM5974_WELLSPRING_MODE_READ_REQUEST_ID,
467 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
468 BCM5974_WELLSPRING_MODE_REQUEST_VALUE,
469 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000);
472 err("bcm5974: could not read from device");
477 /* apply the mode switch */
479 BCM5974_WELLSPRING_MODE_VENDOR_VALUE :
480 BCM5974_WELLSPRING_MODE_NORMAL_VALUE;
482 /* write configuration */
483 size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
484 BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID,
485 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
486 BCM5974_WELLSPRING_MODE_REQUEST_VALUE,
487 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000);
490 err("bcm5974: could not write to device");
495 dprintk(2, "bcm5974: switched to %s mode.\n",
496 on ? "wellspring" : "normal");
503 static void bcm5974_irq_button(struct urb *urb)
505 struct bcm5974 *dev = urb->context;
508 switch (urb->status) {
515 dbg("bcm5974: button urb shutting down: %d", urb->status);
518 dbg("bcm5974: button urb status: %d", urb->status);
522 if (report_bt_state(dev, dev->bt_urb->actual_length))
523 dprintk(1, "bcm5974: bad button package, length: %d\n",
524 dev->bt_urb->actual_length);
527 error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC);
529 err("bcm5974: button urb failed: %d", error);
532 static void bcm5974_irq_trackpad(struct urb *urb)
534 struct bcm5974 *dev = urb->context;
537 switch (urb->status) {
544 dbg("bcm5974: trackpad urb shutting down: %d", urb->status);
547 dbg("bcm5974: trackpad urb status: %d", urb->status);
551 /* control response ignored */
552 if (dev->tp_urb->actual_length == 2)
555 if (report_tp_state(dev, dev->tp_urb->actual_length))
556 dprintk(1, "bcm5974: bad trackpad package, length: %d\n",
557 dev->tp_urb->actual_length);
560 error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC);
562 err("bcm5974: trackpad urb failed: %d", error);
566 * The Wellspring trackpad, like many recent Apple trackpads, share
567 * the usb device with the keyboard. Since keyboards are usually
568 * handled by the HID system, the device ends up being handled by two
569 * modules. Setting up the device therefore becomes slightly
570 * complicated. To enable multitouch features, a mode switch is
571 * required, which is usually applied via the control interface of the
572 * device. It can be argued where this switch should take place. In
573 * some drivers, like appletouch, the switch is made during
574 * probe. However, the hid module may also alter the state of the
575 * device, resulting in trackpad malfunction under certain
576 * circumstances. To get around this problem, there is at least one
577 * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to
578 * recieve a reset_resume request rather than the normal resume.
579 * Since the implementation of reset_resume is equal to mode switch
580 * plus start_traffic, it seems easier to always do the switch when
581 * starting traffic on the device.
583 static int bcm5974_start_traffic(struct bcm5974 *dev)
587 error = bcm5974_wellspring_mode(dev, true);
589 dprintk(1, "bcm5974: mode switch failed\n");
593 error = usb_submit_urb(dev->bt_urb, GFP_KERNEL);
597 error = usb_submit_urb(dev->tp_urb, GFP_KERNEL);
604 usb_kill_urb(dev->bt_urb);
606 bcm5974_wellspring_mode(dev, false);
611 static void bcm5974_pause_traffic(struct bcm5974 *dev)
613 usb_kill_urb(dev->tp_urb);
614 usb_kill_urb(dev->bt_urb);
615 bcm5974_wellspring_mode(dev, false);
619 * The code below implements open/close and manual suspend/resume.
620 * All functions may be called in random order.
622 * Opening a suspended device fails with EACCES - permission denied.
624 * Failing a resume leaves the device resumed but closed.
626 static int bcm5974_open(struct input_dev *input)
628 struct bcm5974 *dev = input_get_drvdata(input);
631 error = usb_autopm_get_interface(dev->intf);
635 mutex_lock(&dev->pm_mutex);
637 error = bcm5974_start_traffic(dev);
641 mutex_unlock(&dev->pm_mutex);
644 usb_autopm_put_interface(dev->intf);
649 static void bcm5974_close(struct input_dev *input)
651 struct bcm5974 *dev = input_get_drvdata(input);
653 mutex_lock(&dev->pm_mutex);
655 bcm5974_pause_traffic(dev);
658 mutex_unlock(&dev->pm_mutex);
660 usb_autopm_put_interface(dev->intf);
663 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message)
665 struct bcm5974 *dev = usb_get_intfdata(iface);
667 mutex_lock(&dev->pm_mutex);
670 bcm5974_pause_traffic(dev);
672 mutex_unlock(&dev->pm_mutex);
677 static int bcm5974_resume(struct usb_interface *iface)
679 struct bcm5974 *dev = usb_get_intfdata(iface);
682 mutex_lock(&dev->pm_mutex);
685 error = bcm5974_start_traffic(dev);
687 mutex_unlock(&dev->pm_mutex);
692 static int bcm5974_probe(struct usb_interface *iface,
693 const struct usb_device_id *id)
695 struct usb_device *udev = interface_to_usbdev(iface);
696 const struct bcm5974_config *cfg;
698 struct input_dev *input_dev;
701 /* find the product index */
702 cfg = bcm5974_get_config(udev);
704 /* allocate memory for our device state and initialize it */
705 dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL);
706 input_dev = input_allocate_device();
707 if (!dev || !input_dev) {
708 err("bcm5974: out of memory");
714 dev->input = input_dev;
716 mutex_init(&dev->pm_mutex);
719 dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL);
723 dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL);
725 goto err_free_bt_urb;
727 dev->bt_data = usb_alloc_coherent(dev->udev,
728 dev->cfg.bt_datalen, GFP_KERNEL,
729 &dev->bt_urb->transfer_dma);
733 dev->tp_data = usb_alloc_coherent(dev->udev,
734 dev->cfg.tp_datalen, GFP_KERNEL,
735 &dev->tp_urb->transfer_dma);
737 goto err_free_bt_buffer;
739 usb_fill_int_urb(dev->bt_urb, udev,
740 usb_rcvintpipe(udev, cfg->bt_ep),
741 dev->bt_data, dev->cfg.bt_datalen,
742 bcm5974_irq_button, dev, 1);
744 usb_fill_int_urb(dev->tp_urb, udev,
745 usb_rcvintpipe(udev, cfg->tp_ep),
746 dev->tp_data, dev->cfg.tp_datalen,
747 bcm5974_irq_trackpad, dev, 1);
749 /* create bcm5974 device */
750 usb_make_path(udev, dev->phys, sizeof(dev->phys));
751 strlcat(dev->phys, "/input0", sizeof(dev->phys));
753 input_dev->name = "bcm5974";
754 input_dev->phys = dev->phys;
755 usb_to_input_id(dev->udev, &input_dev->id);
756 /* report driver capabilities via the version field */
757 input_dev->id.version = cfg->caps;
758 input_dev->dev.parent = &iface->dev;
760 input_set_drvdata(input_dev, dev);
762 input_dev->open = bcm5974_open;
763 input_dev->close = bcm5974_close;
765 setup_events_to_report(input_dev, cfg);
767 error = input_register_device(dev->input);
769 goto err_free_buffer;
771 /* save our data pointer in this interface device */
772 usb_set_intfdata(iface, dev);
777 usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
778 dev->tp_data, dev->tp_urb->transfer_dma);
780 usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
781 dev->bt_data, dev->bt_urb->transfer_dma);
783 usb_free_urb(dev->tp_urb);
785 usb_free_urb(dev->bt_urb);
787 usb_set_intfdata(iface, NULL);
788 input_free_device(input_dev);
793 static void bcm5974_disconnect(struct usb_interface *iface)
795 struct bcm5974 *dev = usb_get_intfdata(iface);
797 usb_set_intfdata(iface, NULL);
799 input_unregister_device(dev->input);
800 usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
801 dev->tp_data, dev->tp_urb->transfer_dma);
802 usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
803 dev->bt_data, dev->bt_urb->transfer_dma);
804 usb_free_urb(dev->tp_urb);
805 usb_free_urb(dev->bt_urb);
809 static struct usb_driver bcm5974_driver = {
811 .probe = bcm5974_probe,
812 .disconnect = bcm5974_disconnect,
813 .suspend = bcm5974_suspend,
814 .resume = bcm5974_resume,
815 .id_table = bcm5974_table,
816 .supports_autosuspend = 1,
819 static int __init bcm5974_init(void)
821 return usb_register(&bcm5974_driver);
824 static void __exit bcm5974_exit(void)
826 usb_deregister(&bcm5974_driver);
829 module_init(bcm5974_init);
830 module_exit(bcm5974_exit);