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 /* MacBook Pro (Geyser 3 & 4) initialization constants */
133 #define ATP_GEYSER3_MODE_READ_REQUEST_ID 1
134 #define ATP_GEYSER3_MODE_WRITE_REQUEST_ID 9
135 #define ATP_GEYSER3_MODE_REQUEST_VALUE 0x300
136 #define ATP_GEYSER3_MODE_REQUEST_INDEX 0
137 #define ATP_GEYSER3_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 int open; /* non-zero if opened */
146 struct input_dev *input; /* input dev */
147 int valid; /* are the sensors valid ? */
148 int x_old; /* last reported x/y, */
149 int y_old; /* used for smoothing */
150 /* current value of the sensors */
151 signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
152 /* last value of the sensors */
153 signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
154 /* accumulated sensors */
155 int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
156 int overflowwarn; /* overflow warning printed? */
157 int datalen; /* size of an USB urb transfer */
160 #define dbg_dump(msg, tab) \
163 printk("appletouch: %s %lld", msg, (long long)jiffies); \
164 for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) \
165 printk(" %02x", tab[i]); \
169 #define dprintk(format, a...) \
171 if (debug) printk(format, ##a); \
174 MODULE_AUTHOR("Johannes Berg, Stelian Pop, Frank Arnold, Michael Hanselmann");
175 MODULE_DESCRIPTION("Apple PowerBooks USB touchpad driver");
176 MODULE_LICENSE("GPL");
179 * Make the threshold a module parameter
181 static int threshold = ATP_THRESHOLD;
182 module_param(threshold, int, 0644);
183 MODULE_PARM_DESC(threshold, "Discards any change in data from a sensor (trackpad has hundreds of these sensors) less than this value");
185 static int debug = 1;
186 module_param(debug, int, 0644);
187 MODULE_PARM_DESC(debug, "Activate debugging output");
189 /* Checks if the device a Geyser 2 (ANSI, ISO, JIS) */
190 static inline int atp_is_geyser_2(struct atp *dev)
192 u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
194 return (productId == GEYSER_ANSI_PRODUCT_ID) ||
195 (productId == GEYSER_ISO_PRODUCT_ID) ||
196 (productId == GEYSER_JIS_PRODUCT_ID);
199 static inline int atp_is_geyser_3(struct atp *dev)
201 u16 productId = le16_to_cpu(dev->udev->descriptor.idProduct);
203 return (productId == GEYSER3_ANSI_PRODUCT_ID) ||
204 (productId == GEYSER3_ISO_PRODUCT_ID) ||
205 (productId == GEYSER3_JIS_PRODUCT_ID) ||
206 (productId == GEYSER4_ANSI_PRODUCT_ID) ||
207 (productId == GEYSER4_ISO_PRODUCT_ID) ||
208 (productId == GEYSER4_JIS_PRODUCT_ID);
211 static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
212 int *z, int *fingers)
215 /* values to calculate mean */
216 int pcum = 0, psum = 0;
217 int is_increasing = 0;
221 for (i = 0; i < nb_sensors; i++) {
222 if (xy_sensors[i] < threshold) {
230 * Makes the finger detection more versatile. For example,
231 * two fingers with no gap will be detected. Also, my
232 * tests show it less likely to have intermittent loss
233 * of multiple finger readings while moving around (scrolling).
235 * Changes the multiple finger detection to counting humps on
236 * sensors (transitions from nonincreasing to increasing)
237 * instead of counting transitions from low sensors (no
238 * finger reading) to high sensors (finger above
241 * - Jason Parekh <jasonparekh@gmail.com>
243 if (i < 1 || (!is_increasing && xy_sensors[i - 1] < xy_sensors[i])) {
246 } else if (i > 0 && xy_sensors[i - 1] >= xy_sensors[i]) {
251 * Subtracts threshold so a high sensor that just passes the threshold
252 * won't skew the calculated absolute coordinate. Fixes an issue
253 * where slowly moving the mouse would occassionaly jump a number of
254 * pixels (let me restate--slowly moving the mouse makes this issue
257 pcum += (xy_sensors[i] - threshold) * i;
258 psum += (xy_sensors[i] - threshold);
263 return pcum * fact / psum;
269 static inline void atp_report_fingers(struct input_dev *input, int fingers)
271 input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
272 input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
273 input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
276 static void atp_complete(struct urb* urb)
278 int x, y, x_z, y_z, x_f, y_f;
280 struct atp *dev = urb->context;
282 switch (urb->status) {
287 if(!dev->overflowwarn) {
288 printk("appletouch: OVERFLOW with data "
289 "length %d, actual length is %d\n",
290 dev->datalen, dev->urb->actual_length);
291 dev->overflowwarn = 1;
296 /* This urb is terminated, clean up */
297 dbg("%s - urb shutting down with status: %d",
298 __FUNCTION__, urb->status);
301 dbg("%s - nonzero urb status received: %d",
302 __FUNCTION__, urb->status);
306 /* drop incomplete datasets */
307 if (dev->urb->actual_length != dev->datalen) {
308 dprintk("appletouch: incomplete data package"
309 " (first byte: %d, length: %d).\n",
310 dev->data[0], dev->urb->actual_length);
314 /* reorder the sensors values */
315 if (atp_is_geyser_3(dev)) {
316 memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
319 * The values are laid out like this:
320 * -, Y1, Y2, -, Y3, Y4, -, ..., -, X1, X2, -, X3, X4, ...
321 * '-' is an unused value.
325 for (i = 0, j = 19; i < 20; i += 2, j += 3) {
326 dev->xy_cur[i] = dev->data[j + 1];
327 dev->xy_cur[i + 1] = dev->data[j + 2];
330 for (i = 0, j = 1; i < 9; i += 2, j += 3) {
331 dev->xy_cur[ATP_XSENSORS + i] = dev->data[j + 1];
332 dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 2];
334 } else if (atp_is_geyser_2(dev)) {
335 memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
338 * The values are laid out like this:
339 * Y1, Y2, -, Y3, Y4, -, ..., X1, X2, -, X3, X4, -, ...
340 * '-' is an unused value.
344 for (i = 0, j = 19; i < 20; i += 2, j += 3) {
345 dev->xy_cur[i] = dev->data[j];
346 dev->xy_cur[i + 1] = dev->data[j + 1];
350 for (i = 0, j = 1; i < 9; i += 2, j += 3) {
351 dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
352 dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
355 for (i = 0; i < 8; i++) {
357 dev->xy_cur[i ] = dev->data[5 * i + 2];
358 dev->xy_cur[i + 8] = dev->data[5 * i + 4];
359 dev->xy_cur[i + 16] = dev->data[5 * i + 42];
361 dev->xy_cur[i + 24] = dev->data[5 * i + 44];
364 dev->xy_cur[i + 26] = dev->data[5 * i + 1];
365 dev->xy_cur[i + 34] = dev->data[5 * i + 3];
369 dbg_dump("sample", dev->xy_cur);
374 dev->x_old = dev->y_old = -1;
375 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
377 if (atp_is_geyser_3(dev)) /* No 17" Macbooks (yet) */
380 /* 17" Powerbooks have extra X sensors */
381 for (i = (atp_is_geyser_2(dev)?15:16); i < ATP_XSENSORS; i++) {
382 if (!dev->xy_cur[i]) continue;
384 printk("appletouch: 17\" model detected.\n");
385 if(atp_is_geyser_2(dev))
386 input_set_abs_params(dev->input, ABS_X, 0,
391 input_set_abs_params(dev->input, ABS_X, 0,
402 for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
403 /* accumulate the change */
404 signed char change = dev->xy_old[i] - dev->xy_cur[i];
405 dev->xy_acc[i] -= change;
407 /* prevent down drifting */
408 if (dev->xy_acc[i] < 0)
412 memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
414 dbg_dump("accumulator", dev->xy_acc);
416 x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
417 ATP_XFACT, &x_z, &x_f);
418 y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
419 ATP_YFACT, &y_z, &y_f);
422 if (dev->x_old != -1) {
423 x = (dev->x_old * 3 + x) >> 2;
424 y = (dev->y_old * 3 + y) >> 2;
429 printk("appletouch: X: %3d Y: %3d "
433 input_report_key(dev->input, BTN_TOUCH, 1);
434 input_report_abs(dev->input, ABS_X, x);
435 input_report_abs(dev->input, ABS_Y, y);
436 input_report_abs(dev->input, ABS_PRESSURE,
437 min(ATP_PRESSURE, x_z + y_z));
438 atp_report_fingers(dev->input, max(x_f, y_f));
445 dev->x_old = dev->y_old = -1;
446 input_report_key(dev->input, BTN_TOUCH, 0);
447 input_report_abs(dev->input, ABS_PRESSURE, 0);
448 atp_report_fingers(dev->input, 0);
450 /* reset the accumulator on release */
451 memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
454 input_report_key(dev->input, BTN_LEFT,
455 !!dev->data[dev->datalen - 1]);
457 input_sync(dev->input);
460 retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
462 err("%s - usb_submit_urb failed with result %d",
463 __FUNCTION__, retval);
467 static int atp_open(struct input_dev *input)
469 struct atp *dev = input_get_drvdata(input);
471 if (usb_submit_urb(dev->urb, GFP_ATOMIC))
478 static void atp_close(struct input_dev *input)
480 struct atp *dev = input_get_drvdata(input);
482 usb_kill_urb(dev->urb);
486 static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id)
489 struct input_dev *input_dev;
490 struct usb_device *udev = interface_to_usbdev(iface);
491 struct usb_host_interface *iface_desc;
492 struct usb_endpoint_descriptor *endpoint;
493 int int_in_endpointAddr = 0;
494 int i, error = -ENOMEM;
496 /* set up the endpoint information */
497 /* use only the first interrupt-in endpoint */
498 iface_desc = iface->cur_altsetting;
499 for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
500 endpoint = &iface_desc->endpoint[i].desc;
501 if (!int_in_endpointAddr && usb_endpoint_is_int_in(endpoint)) {
502 /* we found an interrupt in endpoint */
503 int_in_endpointAddr = endpoint->bEndpointAddress;
507 if (!int_in_endpointAddr) {
508 err("Could not find int-in endpoint");
512 /* allocate memory for our device state and initialize it */
513 dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
514 input_dev = input_allocate_device();
515 if (!dev || !input_dev) {
516 err("Out of memory");
521 dev->input = input_dev;
522 dev->overflowwarn = 0;
523 if (atp_is_geyser_3(dev))
525 else if (atp_is_geyser_2(dev))
530 if (atp_is_geyser_3(dev)) {
532 * By default Geyser 3 device sends standard USB HID mouse
533 * packets (Report ID 2). This code changes device mode, so it
534 * sends raw sensor reports (Report ID 5).
539 size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
540 ATP_GEYSER3_MODE_READ_REQUEST_ID,
541 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
542 ATP_GEYSER3_MODE_REQUEST_VALUE,
543 ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
546 err("Could not do mode read request from device"
551 /* Apply the mode switch */
552 data[0] = ATP_GEYSER3_MODE_VENDOR_VALUE;
554 size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
555 ATP_GEYSER3_MODE_WRITE_REQUEST_ID,
556 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
557 ATP_GEYSER3_MODE_REQUEST_VALUE,
558 ATP_GEYSER3_MODE_REQUEST_INDEX, &data, 8, 5000);
561 err("Could not do mode write request to device"
565 printk("appletouch Geyser 3 inited.\n");
568 dev->urb = usb_alloc_urb(0, GFP_KERNEL);
572 dev->data = usb_buffer_alloc(dev->udev, dev->datalen, GFP_KERNEL,
573 &dev->urb->transfer_dma);
577 usb_fill_int_urb(dev->urb, udev,
578 usb_rcvintpipe(udev, int_in_endpointAddr),
579 dev->data, dev->datalen, atp_complete, dev, 1);
581 usb_make_path(udev, dev->phys, sizeof(dev->phys));
582 strlcat(dev->phys, "/input0", sizeof(dev->phys));
584 input_dev->name = "appletouch";
585 input_dev->phys = dev->phys;
586 usb_to_input_id(dev->udev, &input_dev->id);
587 input_dev->dev.parent = &iface->dev;
589 input_set_drvdata(input_dev, dev);
591 input_dev->open = atp_open;
592 input_dev->close = atp_close;
594 set_bit(EV_ABS, input_dev->evbit);
596 if (atp_is_geyser_3(dev)) {
598 * MacBook have 20 X sensors, 10 Y sensors
600 input_set_abs_params(input_dev, ABS_X, 0,
601 ((20 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
602 input_set_abs_params(input_dev, ABS_Y, 0,
603 ((10 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
604 } else if (atp_is_geyser_2(dev)) {
606 * Oct 2005 15" PowerBooks have 15 X sensors, 17" are detected
609 input_set_abs_params(input_dev, ABS_X, 0,
610 ((15 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
611 input_set_abs_params(input_dev, ABS_Y, 0,
612 ((9 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
615 * 12" and 15" Powerbooks only have 16 x sensors,
616 * 17" models are detected later.
618 input_set_abs_params(input_dev, ABS_X, 0,
619 (16 - 1) * ATP_XFACT - 1, ATP_FUZZ, 0);
620 input_set_abs_params(input_dev, ABS_Y, 0,
621 (ATP_YSENSORS - 1) * ATP_YFACT - 1, ATP_FUZZ, 0);
623 input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
625 set_bit(EV_KEY, input_dev->evbit);
626 set_bit(BTN_TOUCH, input_dev->keybit);
627 set_bit(BTN_TOOL_FINGER, input_dev->keybit);
628 set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
629 set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
630 set_bit(BTN_LEFT, input_dev->keybit);
632 error = input_register_device(dev->input);
634 goto err_free_buffer;
636 /* save our data pointer in this interface device */
637 usb_set_intfdata(iface, dev);
642 usb_buffer_free(dev->udev, dev->datalen,
643 dev->data, dev->urb->transfer_dma);
645 usb_free_urb(dev->urb);
647 usb_set_intfdata(iface, NULL);
649 input_free_device(input_dev);
653 static void atp_disconnect(struct usb_interface *iface)
655 struct atp *dev = usb_get_intfdata(iface);
657 usb_set_intfdata(iface, NULL);
659 usb_kill_urb(dev->urb);
660 input_unregister_device(dev->input);
661 usb_buffer_free(dev->udev, dev->datalen,
662 dev->data, dev->urb->transfer_dma);
663 usb_free_urb(dev->urb);
666 printk(KERN_INFO "input: appletouch disconnected\n");
669 static int atp_suspend(struct usb_interface *iface, pm_message_t message)
671 struct atp *dev = usb_get_intfdata(iface);
672 usb_kill_urb(dev->urb);
677 static int atp_resume(struct usb_interface *iface)
679 struct atp *dev = usb_get_intfdata(iface);
680 if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
686 static struct usb_driver atp_driver = {
687 .name = "appletouch",
689 .disconnect = atp_disconnect,
690 .suspend = atp_suspend,
691 .resume = atp_resume,
692 .id_table = atp_table,
695 static int __init atp_init(void)
697 return usb_register(&atp_driver);
700 static void __exit atp_exit(void)
702 usb_deregister(&atp_driver);
705 module_init(atp_init);
706 module_exit(atp_exit);