2 * Apple USB Touchpad (for post-February 2005 PowerBooks and MacBooks) driver
4 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
5 * Copyright (C) 2005 Johannes Berg (johannes@sipsolutions.net)
6 * Copyright (C) 2005 Stelian Pop (stelian@popies.net)
7 * Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de)
8 * Copyright (C) 2005 Peter Osterlund (petero2@telia.com)
9 * Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch)
10 * Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch)
12 * Thanks to Alex Harper <basilisk@foobox.net> for his inputs.
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include <linux/kernel.h>
31 #include <linux/errno.h>
32 #include <linux/init.h>
33 #include <linux/slab.h>
34 #include <linux/module.h>
35 #include <linux/usb/input.h>
37 /* Apple has powerbooks which have the keyboard with different Product IDs */
38 #define APPLE_VENDOR_ID 0x05AC
40 /* These names come from Info.plist in AppleUSBTrackpad.kext */
41 #define FOUNTAIN_ANSI_PRODUCT_ID 0x020E
42 #define FOUNTAIN_ISO_PRODUCT_ID 0x020F
44 #define FOUNTAIN_TP_ONLY_PRODUCT_ID 0x030A
46 #define GEYSER1_TP_ONLY_PRODUCT_ID 0x030B
48 #define GEYSER_ANSI_PRODUCT_ID 0x0214
49 #define GEYSER_ISO_PRODUCT_ID 0x0215
50 #define GEYSER_JIS_PRODUCT_ID 0x0216
53 #define GEYSER3_ANSI_PRODUCT_ID 0x0217
54 #define GEYSER3_ISO_PRODUCT_ID 0x0218
55 #define GEYSER3_JIS_PRODUCT_ID 0x0219
58 * Geyser IV: same as Geyser III according to Info.plist in AppleUSBTrackpad.kext
59 * -> same IOClass (AppleUSBGrIIITrackpad), same acceleration tables
61 #define GEYSER4_ANSI_PRODUCT_ID 0x021A
62 #define GEYSER4_ISO_PRODUCT_ID 0x021B
63 #define GEYSER4_JIS_PRODUCT_ID 0x021C
65 #define ATP_DEVICE(prod) \
66 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
67 USB_DEVICE_ID_MATCH_INT_CLASS | \
68 USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
69 .idVendor = APPLE_VENDOR_ID, \
70 .idProduct = (prod), \
71 .bInterfaceClass = 0x03, \
72 .bInterfaceProtocol = 0x02
74 /* table of devices that work with this driver */
75 static struct usb_device_id atp_table [] = {
76 { ATP_DEVICE(FOUNTAIN_ANSI_PRODUCT_ID) },
77 { ATP_DEVICE(FOUNTAIN_ISO_PRODUCT_ID) },
78 { ATP_DEVICE(FOUNTAIN_TP_ONLY_PRODUCT_ID) },
79 { ATP_DEVICE(GEYSER1_TP_ONLY_PRODUCT_ID) },
81 /* PowerBooks Oct 2005 */
82 { ATP_DEVICE(GEYSER_ANSI_PRODUCT_ID) },
83 { ATP_DEVICE(GEYSER_ISO_PRODUCT_ID) },
84 { ATP_DEVICE(GEYSER_JIS_PRODUCT_ID) },
86 /* Core Duo MacBook & MacBook Pro */
87 { ATP_DEVICE(GEYSER3_ANSI_PRODUCT_ID) },
88 { ATP_DEVICE(GEYSER3_ISO_PRODUCT_ID) },
89 { ATP_DEVICE(GEYSER3_JIS_PRODUCT_ID) },
91 /* Core2 Duo MacBook & MacBook Pro */
92 { ATP_DEVICE(GEYSER4_ANSI_PRODUCT_ID) },
93 { ATP_DEVICE(GEYSER4_ISO_PRODUCT_ID) },
94 { ATP_DEVICE(GEYSER4_JIS_PRODUCT_ID) },
96 /* Terminating entry */
99 MODULE_DEVICE_TABLE (usb, atp_table);
102 * number of sensors. Note that only 16 instead of 26 X (horizontal)
103 * sensors exist on 12" and 15" PowerBooks. All models have 16 Y
104 * (vertical) sensors.
106 #define ATP_XSENSORS 26
107 #define ATP_YSENSORS 16
109 /* amount of fuzz this touchpad generates */
112 /* maximum pressure this driver will report */
113 #define ATP_PRESSURE 300
115 * multiplication factor for the X and Y coordinates.
116 * We try to keep the touchpad aspect ratio while still doing only simple
118 * The factors below give coordinates like:
119 * 0 <= x < 960 on 12" and 15" Powerbooks
120 * 0 <= x < 1600 on 17" Powerbooks
127 * Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
130 #define ATP_THRESHOLD 5
132 /* Geyser initialization constants */
133 #define ATP_GEYSER_MODE_READ_REQUEST_ID 1
134 #define ATP_GEYSER_MODE_WRITE_REQUEST_ID 9
135 #define ATP_GEYSER_MODE_REQUEST_VALUE 0x300
136 #define ATP_GEYSER_MODE_REQUEST_INDEX 0
137 #define ATP_GEYSER_MODE_VENDOR_VALUE 0x04
139 /* Structure to hold all of our device specific stuff */
142 struct usb_device * udev; /* usb device */
143 struct urb * urb; /* usb request block */
144 signed char * data; /* transferred data */
145 struct input_dev * input; /* input dev */
146 unsigned char open; /* non-zero if opened */
147 unsigned char valid; /* are the sensors valid ? */
148 unsigned char size_detect_done;
149 unsigned char overflowwarn; /* overflow warning printed? */
150 int x_old; /* last reported x/y, */
151 int y_old; /* used for smoothing */
152 /* current value of the sensors */
153 signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
154 /* last value of the sensors */
155 signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
156 /* accumulated sensors */
157 int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
158 int datalen; /* size of an USB urb transfer */
159 int idlecount; /* number of empty packets */
160 struct work_struct work;
163 #define dbg_dump(msg, tab) \
166 printk("appletouch: %s %lld", msg, (long long)jiffies); \
167 for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) \
168 printk(" %02x", tab[i]); \
172 #define dprintk(format, a...) \
174 if (debug) printk(KERN_DEBUG format, ##a); \
177 MODULE_AUTHOR("Johannes Berg, Stelian Pop, Frank Arnold, Michael Hanselmann");
178 MODULE_DESCRIPTION("Apple PowerBooks USB touchpad driver");
179 MODULE_LICENSE("GPL");
182 * Make the threshold a module parameter
184 static int threshold = ATP_THRESHOLD;
185 module_param(threshold, int, 0644);
186 MODULE_PARM_DESC(threshold, "Discards any change in data from a sensor (trackpad has hundreds of these sensors) less than this value");
188 static int debug = 1;
189 module_param(debug, int, 0644);
190 MODULE_PARM_DESC(debug, "Activate debugging output");
192 static inline int atp_is_fountain(struct atp *dev)
194 u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
196 return productId == FOUNTAIN_ANSI_PRODUCT_ID ||
197 productId == FOUNTAIN_ISO_PRODUCT_ID ||
198 productId == FOUNTAIN_TP_ONLY_PRODUCT_ID;
201 /* Checks if the device a Geyser 2 (ANSI, ISO, JIS) */
202 static inline int atp_is_geyser_2(struct atp *dev)
204 u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
206 return (productId == GEYSER_ANSI_PRODUCT_ID) ||
207 (productId == GEYSER_ISO_PRODUCT_ID) ||
208 (productId == GEYSER_JIS_PRODUCT_ID);
211 static inline int atp_is_geyser_3(struct atp *dev)
213 u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
215 return (productId == GEYSER3_ANSI_PRODUCT_ID) ||
216 (productId == GEYSER3_ISO_PRODUCT_ID) ||
217 (productId == GEYSER3_JIS_PRODUCT_ID) ||
218 (productId == GEYSER4_ANSI_PRODUCT_ID) ||
219 (productId == GEYSER4_ISO_PRODUCT_ID) ||
220 (productId == GEYSER4_JIS_PRODUCT_ID);
224 * By default newer Geyser devices send standard USB HID mouse
225 * packets (Report ID 2). This code changes device mode, so it
226 * sends raw sensor reports (Report ID 5).
228 static int atp_geyser_init(struct usb_device *udev)
233 size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
234 ATP_GEYSER_MODE_READ_REQUEST_ID,
235 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
236 ATP_GEYSER_MODE_REQUEST_VALUE,
237 ATP_GEYSER_MODE_REQUEST_INDEX, &data, 8, 5000);
240 err("Could not do mode read request from device"
241 " (Geyser Raw mode)");
245 /* Apply the mode switch */
246 data[0] = ATP_GEYSER_MODE_VENDOR_VALUE;
248 size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
249 ATP_GEYSER_MODE_WRITE_REQUEST_ID,
250 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
251 ATP_GEYSER_MODE_REQUEST_VALUE,
252 ATP_GEYSER_MODE_REQUEST_INDEX, &data, 8, 5000);
255 err("Could not do mode write request to device"
256 " (Geyser Raw mode)");
263 * Reinitialise the device. This usually stops stream of empty packets
266 static void atp_reinit(struct work_struct *work)
268 struct atp *dev = container_of(work, struct atp, work);
269 struct usb_device *udev = dev->udev;
274 atp_geyser_init(udev);
276 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
278 err("%s - usb_submit_urb failed with result %d",
279 __FUNCTION__, retval);
283 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
284 int *z, int *fingers)
287 /* values to calculate mean */
288 int pcum = 0, psum = 0;
289 int is_increasing = 0;
293 for (i = 0; i < nb_sensors; i++) {
294 if (xy_sensors[i] < threshold) {
302 * Makes the finger detection more versatile. For example,
303 * two fingers with no gap will be detected. Also, my
304 * tests show it less likely to have intermittent loss
305 * of multiple finger readings while moving around (scrolling).
307 * Changes the multiple finger detection to counting humps on
308 * sensors (transitions from nonincreasing to increasing)
309 * instead of counting transitions from low sensors (no
310 * finger reading) to high sensors (finger above
313 * - Jason Parekh <jasonparekh@gmail.com>
315 if (i < 1 || (!is_increasing && xy_sensors[i - 1] < xy_sensors[i])) {
318 } else if (i > 0 && xy_sensors[i - 1] >= xy_sensors[i]) {
323 * Subtracts threshold so a high sensor that just passes the threshold
324 * won't skew the calculated absolute coordinate. Fixes an issue
325 * where slowly moving the mouse would occassionaly jump a number of
326 * pixels (let me restate--slowly moving the mouse makes this issue
329 pcum += (xy_sensors[i] - threshold) * i;
330 psum += (xy_sensors[i] - threshold);
335 return pcum * fact / psum;
341 static inline void atp_report_fingers(struct input_dev *input, int fingers)
343 input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
344 input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
345 input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
348 static void atp_complete(struct urb* urb)
350 int x, y, x_z, y_z, x_f, y_f;
353 struct atp *dev = urb->context;
355 switch (urb->status) {
360 if(!dev->overflowwarn) {
361 printk(KERN_WARNING "appletouch: OVERFLOW with data "
362 "length %d, actual length is %d\n",
363 dev->datalen, dev->urb->actual_length);
364 dev->overflowwarn = 1;
369 /* This urb is terminated, clean up */
370 dbg("%s - urb shutting down with status: %d",
371 __FUNCTION__, urb->status);
374 dbg("%s - nonzero urb status received: %d",
375 __FUNCTION__, urb->status);
379 /* drop incomplete datasets */
380 if (dev->urb->actual_length != dev->datalen) {
381 dprintk("appletouch: incomplete data package"
382 " (first byte: %d, length: %d).\n",
383 dev->data[0], dev->urb->actual_length);
387 /* reorder the sensors values */
388 if (atp_is_geyser_3(dev)) {
389 memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
392 * The values are laid out like this:
393 * -, Y1, Y2, -, Y3, Y4, -, ..., -, X1, X2, -, X3, X4, ...
394 * '-' is an unused value.
398 for (i = 0, j = 19; i < 20; i += 2, j += 3) {
399 dev->xy_cur[i] = dev->data[j + 1];
400 dev->xy_cur[i + 1] = dev->data[j + 2];
403 for (i = 0, j = 1; i < 9; i += 2, j += 3) {
404 dev->xy_cur[ATP_XSENSORS + i] = dev->data[j + 1];
405 dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 2];
407 } else if (atp_is_geyser_2(dev)) {
408 memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
411 * The values are laid out like this:
412 * Y1, Y2, -, Y3, Y4, -, ..., X1, X2, -, X3, X4, -, ...
413 * '-' is an unused value.
417 for (i = 0, j = 19; i < 20; i += 2, j += 3) {
418 dev->xy_cur[i] = dev->data[j];
419 dev->xy_cur[i + 1] = dev->data[j + 1];
423 for (i = 0, j = 1; i < 9; i += 2, j += 3) {
424 dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
425 dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
428 for (i = 0; i < 8; i++) {
430 dev->xy_cur[i ] = dev->data[5 * i + 2];
431 dev->xy_cur[i + 8] = dev->data[5 * i + 4];
432 dev->xy_cur[i + 16] = dev->data[5 * i + 42];
434 dev->xy_cur[i + 24] = dev->data[5 * i + 44];
437 dev->xy_cur[i + 26] = dev->data[5 * i + 1];
438 dev->xy_cur[i + 34] = dev->data[5 * i + 3];
442 dbg_dump("sample", dev->xy_cur);
447 dev->x_old = dev->y_old = -1;
448 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
450 if (dev->size_detect_done ||
451 atp_is_geyser_3(dev)) /* No 17" Macbooks (yet) */
454 /* 17" Powerbooks have extra X sensors */
455 for (i = (atp_is_geyser_2(dev) ? 15 : 16); i < ATP_XSENSORS; i++) {
459 printk(KERN_INFO "appletouch: 17\" model detected.\n");
460 if (atp_is_geyser_2(dev))
461 input_set_abs_params(dev->input, ABS_X, 0,
466 input_set_abs_params(dev->input, ABS_X, 0,
473 dev->size_detect_done = 1;
477 for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
478 /* accumulate the change */
479 signed char change = dev->xy_old[i] - dev->xy_cur[i];
480 dev->xy_acc[i] -= change;
482 /* prevent down drifting */
483 if (dev->xy_acc[i] < 0)
487 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
489 dbg_dump("accumulator", dev->xy_acc);
491 x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
492 ATP_XFACT, &x_z, &x_f);
493 y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
494 ATP_YFACT, &y_z, &y_f);
495 key = dev->data[dev->datalen - 1] & 1;
498 if (dev->x_old != -1) {
499 x = (dev->x_old * 3 + x) >> 2;
500 y = (dev->y_old * 3 + y) >> 2;
505 printk(KERN_DEBUG "appletouch: X: %3d Y: %3d "
509 input_report_key(dev->input, BTN_TOUCH, 1);
510 input_report_abs(dev->input, ABS_X, x);
511 input_report_abs(dev->input, ABS_Y, y);
512 input_report_abs(dev->input, ABS_PRESSURE,
513 min(ATP_PRESSURE, x_z + y_z));
514 atp_report_fingers(dev->input, max(x_f, y_f));
519 } else if (!x && !y) {
521 dev->x_old = dev->y_old = -1;
522 input_report_key(dev->input, BTN_TOUCH, 0);
523 input_report_abs(dev->input, ABS_PRESSURE, 0);
524 atp_report_fingers(dev->input, 0);
526 /* reset the accumulator on release */
527 memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
530 input_report_key(dev->input, BTN_LEFT, key);
531 input_sync(dev->input);
534 * Many Geysers will continue to send packets continually after
535 * the first touch unless reinitialised. Do so if it's been
536 * idle for a while in order to avoid waking the kernel up
537 * several hundred times a second. Re-initialization does not
538 * work on Fountain touchpads.
540 if (!atp_is_fountain(dev)) {
541 if (!x && !y && !key) {
543 if (dev->idlecount == 10) {
545 schedule_work(&dev->work);
546 /* Don't resubmit urb here, wait for reinit */
554 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
556 err("%s - usb_submit_urb failed with result %d",
557 __FUNCTION__, retval);
561 static int atp_open(struct input_dev *input)
563 struct atp *dev = input_get_drvdata(input);
565 if (usb_submit_urb(dev->urb, GFP_ATOMIC))
572 static void atp_close(struct input_dev *input)
574 struct atp *dev = input_get_drvdata(input);
576 usb_kill_urb(dev->urb);
577 cancel_work_sync(&dev->work);
581 static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id)
584 struct input_dev *input_dev;
585 struct usb_device *udev = interface_to_usbdev(iface);
586 struct usb_host_interface *iface_desc;
587 struct usb_endpoint_descriptor *endpoint;
588 int int_in_endpointAddr = 0;
589 int i, error = -ENOMEM;
591 /* set up the endpoint information */
592 /* use only the first interrupt-in endpoint */
593 iface_desc = iface->cur_altsetting;
594 for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
595 endpoint = &iface_desc->endpoint[i].desc;
596 if (!int_in_endpointAddr && usb_endpoint_is_int_in(endpoint)) {
597 /* we found an interrupt in endpoint */
598 int_in_endpointAddr = endpoint->bEndpointAddress;
602 if (!int_in_endpointAddr) {
603 err("Could not find int-in endpoint");
607 /* allocate memory for our device state and initialize it */
608 dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
609 input_dev = input_allocate_device();
610 if (!dev || !input_dev) {
611 err("Out of memory");
616 dev->input = input_dev;
617 dev->overflowwarn = 0;
618 if (atp_is_geyser_3(dev))
620 else if (atp_is_geyser_2(dev))
625 if (!atp_is_fountain(dev)) {
626 /* switch to raw sensor mode */
627 if (atp_geyser_init(udev))
630 printk(KERN_INFO "appletouch: Geyser mode initialized.\n");
633 dev->urb = usb_alloc_urb(0, GFP_KERNEL);
637 dev->data = usb_buffer_alloc(dev->udev, dev->datalen, GFP_KERNEL,
638 &dev->urb->transfer_dma);
642 usb_fill_int_urb(dev->urb, udev,
643 usb_rcvintpipe(udev, int_in_endpointAddr),
644 dev->data, dev->datalen, atp_complete, dev, 1);
646 usb_make_path(udev, dev->phys, sizeof(dev->phys));
647 strlcat(dev->phys, "/input0", sizeof(dev->phys));
649 input_dev->name = "appletouch";
650 input_dev->phys = dev->phys;
651 usb_to_input_id(dev->udev, &input_dev->id);
652 input_dev->dev.parent = &iface->dev;
654 input_set_drvdata(input_dev, dev);
656 input_dev->open = atp_open;
657 input_dev->close = atp_close;
659 set_bit(EV_ABS, input_dev->evbit);
661 if (atp_is_geyser_3(dev)) {
663 * MacBook have 20 X sensors, 10 Y sensors
665 input_set_abs_params(input_dev, ABS_X, 0,
666 ((20 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
667 input_set_abs_params(input_dev, ABS_Y, 0,
668 ((10 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
669 } else if (atp_is_geyser_2(dev)) {
671 * Oct 2005 15" PowerBooks have 15 X sensors, 17" are detected
674 input_set_abs_params(input_dev, ABS_X, 0,
675 ((15 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
676 input_set_abs_params(input_dev, ABS_Y, 0,
677 ((9 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
680 * 12" and 15" Powerbooks only have 16 x sensors,
681 * 17" models are detected later.
683 input_set_abs_params(input_dev, ABS_X, 0,
684 (16 - 1) * ATP_XFACT - 1, ATP_FUZZ, 0);
685 input_set_abs_params(input_dev, ABS_Y, 0,
686 (ATP_YSENSORS - 1) * ATP_YFACT - 1, ATP_FUZZ, 0);
688 input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
690 set_bit(EV_KEY, input_dev->evbit);
691 set_bit(BTN_TOUCH, input_dev->keybit);
692 set_bit(BTN_TOOL_FINGER, input_dev->keybit);
693 set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
694 set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
695 set_bit(BTN_LEFT, input_dev->keybit);
697 error = input_register_device(dev->input);
699 goto err_free_buffer;
701 /* save our data pointer in this interface device */
702 usb_set_intfdata(iface, dev);
704 INIT_WORK(&dev->work, atp_reinit);
709 usb_buffer_free(dev->udev, dev->datalen,
710 dev->data, dev->urb->transfer_dma);
712 usb_free_urb(dev->urb);
714 usb_set_intfdata(iface, NULL);
716 input_free_device(input_dev);
720 static void atp_disconnect(struct usb_interface *iface)
722 struct atp *dev = usb_get_intfdata(iface);
724 usb_set_intfdata(iface, NULL);
726 usb_kill_urb(dev->urb);
727 input_unregister_device(dev->input);
728 usb_buffer_free(dev->udev, dev->datalen,
729 dev->data, dev->urb->transfer_dma);
730 usb_free_urb(dev->urb);
733 printk(KERN_INFO "input: appletouch disconnected\n");
736 static int atp_suspend(struct usb_interface *iface, pm_message_t message)
738 struct atp *dev = usb_get_intfdata(iface);
740 usb_kill_urb(dev->urb);
746 static int atp_resume(struct usb_interface *iface)
748 struct atp *dev = usb_get_intfdata(iface);
750 if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
756 static struct usb_driver atp_driver = {
757 .name = "appletouch",
759 .disconnect = atp_disconnect,
760 .suspend = atp_suspend,
761 .resume = atp_resume,
762 .id_table = atp_table,
765 static int __init atp_init(void)
767 return usb_register(&atp_driver);
770 static void __exit atp_exit(void)
772 usb_deregister(&atp_driver);
775 module_init(atp_init);
776 module_exit(atp_exit);