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 54 55 #define BCM5974_DEVICE(prod) { \ 56 .match_flags = (USB_DEVICE_ID_MATCH_DEVICE | \ 57 USB_DEVICE_ID_MATCH_INT_CLASS | \ 58 USB_DEVICE_ID_MATCH_INT_PROTOCOL), \ 59 .idVendor = USB_VENDOR_ID_APPLE, \ 60 .idProduct = (prod), \ 61 .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ 62 .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE \ 63 } 64 65 /* table of devices that work with this driver */ 66 static const struct usb_device_id bcm5974_table[] = { 67 /* MacbookAir1.1 */ 68 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI), 69 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO), 70 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS), 71 /* MacbookProPenryn */ 72 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI), 73 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO), 74 BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS), 75 /* Terminating entry */ 76 {} 77 }; 78 MODULE_DEVICE_TABLE(usb, bcm5974_table); 79 80 MODULE_AUTHOR("Henrik Rydberg"); 81 MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver"); 82 MODULE_LICENSE("GPL"); 83 84 #define dprintk(level, format, a...)\ 85 { if (debug >= level) printk(KERN_DEBUG format, ##a); } 86 87 static int debug = 1; 88 module_param(debug, int, 0644); 89 MODULE_PARM_DESC(debug, "Activate debugging output"); 90 91 /* button data structure */ 92 struct bt_data { 93 u8 unknown1; /* constant */ 94 u8 button; /* left button */ 95 u8 rel_x; /* relative x coordinate */ 96 u8 rel_y; /* relative y coordinate */ 97 }; 98 99 /* trackpad header structure */ 100 struct tp_header { 101 u8 unknown1[16]; /* constants, timers, etc */ 102 u8 fingers; /* number of fingers on trackpad */ 103 u8 unknown2[9]; /* constants, timers, etc */ 104 }; 105 106 /* trackpad finger structure */ 107 struct tp_finger { 108 __le16 origin; /* zero when switching track finger */ 109 __le16 abs_x; /* absolute x coodinate */ 110 __le16 abs_y; /* absolute y coodinate */ 111 __le16 rel_x; /* relative x coodinate */ 112 __le16 rel_y; /* relative y coodinate */ 113 __le16 size_major; /* finger size, major axis? */ 114 __le16 size_minor; /* finger size, minor axis? */ 115 __le16 orientation; /* 16384 when point, else 15 bit angle */ 116 __le16 force_major; /* trackpad force, major axis? */ 117 __le16 force_minor; /* trackpad force, minor axis? */ 118 __le16 unused[3]; /* zeros */ 119 __le16 multi; /* one finger: varies, more fingers: constant */ 120 }; 121 122 /* trackpad data structure, empirically at least ten fingers */ 123 struct tp_data { 124 struct tp_header header; 125 struct tp_finger finger[16]; 126 }; 127 128 /* device-specific parameters */ 129 struct bcm5974_param { 130 int dim; /* logical dimension */ 131 int fuzz; /* logical noise value */ 132 int devmin; /* device minimum reading */ 133 int devmax; /* device maximum reading */ 134 }; 135 136 /* device-specific configuration */ 137 struct bcm5974_config { 138 int ansi, iso, jis; /* the product id of this device */ 139 int bt_ep; /* the endpoint of the button interface */ 140 int bt_datalen; /* data length of the button interface */ 141 int tp_ep; /* the endpoint of the trackpad interface */ 142 int tp_datalen; /* data length of the trackpad interface */ 143 struct bcm5974_param p; /* finger pressure limits */ 144 struct bcm5974_param w; /* finger width limits */ 145 struct bcm5974_param x; /* horizontal limits */ 146 struct bcm5974_param y; /* vertical limits */ 147 }; 148 149 /* logical device structure */ 150 struct bcm5974 { 151 char phys[64]; 152 struct usb_device *udev; /* usb device */ 153 struct usb_interface *intf; /* our interface */ 154 struct input_dev *input; /* input dev */ 155 struct bcm5974_config cfg; /* device configuration */ 156 struct mutex pm_mutex; /* serialize access to open/suspend */ 157 int opened; /* 1: opened, 0: closed */ 158 struct urb *bt_urb; /* button usb request block */ 159 struct bt_data *bt_data; /* button transferred data */ 160 struct urb *tp_urb; /* trackpad usb request block */ 161 struct tp_data *tp_data; /* trackpad transferred data */ 162 int fingers; /* number of fingers on trackpad */ 163 }; 164 165 /* logical dimensions */ 166 #define DIM_PRESSURE 256 /* maximum finger pressure */ 167 #define DIM_WIDTH 16 /* maximum finger width */ 168 #define DIM_X 1280 /* maximum trackpad x value */ 169 #define DIM_Y 800 /* maximum trackpad y value */ 170 171 /* logical signal quality */ 172 #define SN_PRESSURE 45 /* pressure signal-to-noise ratio */ 173 #define SN_WIDTH 100 /* width signal-to-noise ratio */ 174 #define SN_COORD 250 /* coordinate signal-to-noise ratio */ 175 176 /* pressure thresholds */ 177 #define PRESSURE_LOW (2 * DIM_PRESSURE / SN_PRESSURE) 178 #define PRESSURE_HIGH (3 * PRESSURE_LOW) 179 180 /* device constants */ 181 static const struct bcm5974_config bcm5974_config_table[] = { 182 { 183 USB_DEVICE_ID_APPLE_WELLSPRING_ANSI, 184 USB_DEVICE_ID_APPLE_WELLSPRING_ISO, 185 USB_DEVICE_ID_APPLE_WELLSPRING_JIS, 186 0x84, sizeof(struct bt_data), 187 0x81, sizeof(struct tp_data), 188 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, 189 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, 190 { DIM_X, DIM_X / SN_COORD, -4824, 5342 }, 191 { DIM_Y, DIM_Y / SN_COORD, -172, 5820 } 192 }, 193 { 194 USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI, 195 USB_DEVICE_ID_APPLE_WELLSPRING2_ISO, 196 USB_DEVICE_ID_APPLE_WELLSPRING2_JIS, 197 0x84, sizeof(struct bt_data), 198 0x81, sizeof(struct tp_data), 199 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, 200 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, 201 { DIM_X, DIM_X / SN_COORD, -4824, 4824 }, 202 { DIM_Y, DIM_Y / SN_COORD, -172, 4290 } 203 }, 204 {} 205 }; 206 207 /* return the device-specific configuration by device */ 208 static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev) 209 { 210 u16 id = le16_to_cpu(udev->descriptor.idProduct); 211 const struct bcm5974_config *cfg; 212 213 for (cfg = bcm5974_config_table; cfg->ansi; ++cfg) 214 if (cfg->ansi == id || cfg->iso == id || cfg->jis == id) 215 return cfg; 216 217 return bcm5974_config_table; 218 } 219 220 /* convert 16-bit little endian to signed integer */ 221 static inline int raw2int(__le16 x) 222 { 223 return (signed short)le16_to_cpu(x); 224 } 225 226 /* scale device data to logical dimensions (asserts devmin < devmax) */ 227 static inline int int2scale(const struct bcm5974_param *p, int x) 228 { 229 return x * p->dim / (p->devmax - p->devmin); 230 } 231 232 /* all logical value ranges are [0,dim). */ 233 static inline int int2bound(const struct bcm5974_param *p, int x) 234 { 235 int s = int2scale(p, x); 236 237 return clamp_val(s, 0, p->dim - 1); 238 } 239 240 /* setup which logical events to report */ 241 static void setup_events_to_report(struct input_dev *input_dev, 242 const struct bcm5974_config *cfg) 243 { 244 __set_bit(EV_ABS, input_dev->evbit); 245 246 input_set_abs_params(input_dev, ABS_PRESSURE, 247 0, cfg->p.dim, cfg->p.fuzz, 0); 248 input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 249 0, cfg->w.dim, cfg->w.fuzz, 0); 250 input_set_abs_params(input_dev, ABS_X, 251 0, cfg->x.dim, cfg->x.fuzz, 0); 252 input_set_abs_params(input_dev, ABS_Y, 253 0, cfg->y.dim, cfg->y.fuzz, 0); 254 255 __set_bit(EV_KEY, input_dev->evbit); 256 __set_bit(BTN_TOUCH, input_dev->keybit); 257 __set_bit(BTN_TOOL_FINGER, input_dev->keybit); 258 __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); 259 __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); 260 __set_bit(BTN_LEFT, input_dev->keybit); 261 } 262 263 /* report button data as logical button state */ 264 static int report_bt_state(struct bcm5974 *dev, int size) 265 { 266 if (size != sizeof(struct bt_data)) 267 return -EIO; 268 269 input_report_key(dev->input, BTN_LEFT, dev->bt_data->button); 270 input_sync(dev->input); 271 272 return 0; 273 } 274 275 /* report trackpad data as logical trackpad state */ 276 static int report_tp_state(struct bcm5974 *dev, int size) 277 { 278 const struct bcm5974_config *c = &dev->cfg; 279 const struct tp_finger *f = dev->tp_data->finger; 280 struct input_dev *input = dev->input; 281 const int fingers = (size - 26) / 28; 282 int raw_p, raw_w, raw_x, raw_y; 283 int ptest = 0, origin = 0, nmin = 0, nmax = 0; 284 int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0; 285 286 if (size < 26 || (size - 26) % 28 != 0) 287 return -EIO; 288 289 /* always track the first finger; when detached, start over */ 290 if (fingers) { 291 raw_p = raw2int(f->force_major); 292 raw_w = raw2int(f->size_major); 293 raw_x = raw2int(f->abs_x); 294 raw_y = raw2int(f->abs_y); 295 296 dprintk(9, 297 "bcm5974: raw: p: %+05d w: %+05d x: %+05d y: %+05d\n", 298 raw_p, raw_w, raw_x, raw_y); 299 300 ptest = int2bound(&c->p, raw_p); 301 origin = raw2int(f->origin); 302 } 303 304 /* while tracking finger still valid, count all fingers */ 305 if (ptest > PRESSURE_LOW && origin) { 306 abs_p = ptest; 307 abs_w = int2bound(&c->w, raw_w); 308 abs_x = int2bound(&c->x, raw_x - c->x.devmin); 309 abs_y = int2bound(&c->y, c->y.devmax - raw_y); 310 for (; f != dev->tp_data->finger + fingers; f++) { 311 ptest = int2bound(&c->p, raw2int(f->force_major)); 312 if (ptest > PRESSURE_LOW) 313 nmax++; 314 if (ptest > PRESSURE_HIGH) 315 nmin++; 316 } 317 } 318 319 if (dev->fingers < nmin) 320 dev->fingers = nmin; 321 if (dev->fingers > nmax) 322 dev->fingers = nmax; 323 324 input_report_key(input, BTN_TOUCH, dev->fingers > 0); 325 input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1); 326 input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2); 327 input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers > 2); 328 329 input_report_abs(input, ABS_PRESSURE, abs_p); 330 input_report_abs(input, ABS_TOOL_WIDTH, abs_w); 331 332 if (abs_p) { 333 input_report_abs(input, ABS_X, abs_x); 334 input_report_abs(input, ABS_Y, abs_y); 335 336 dprintk(8, 337 "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d " 338 "nmin: %d nmax: %d n: %d\n", 339 abs_p, abs_w, abs_x, abs_y, nmin, nmax, dev->fingers); 340 341 } 342 343 input_sync(input); 344 345 return 0; 346 } 347 348 /* Wellspring initialization constants */ 349 #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1 350 #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9 351 #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE 0x300 352 #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX 0 353 #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE 0x01 354 355 static int bcm5974_wellspring_mode(struct bcm5974 *dev) 356 { 357 char *data = kmalloc(8, GFP_KERNEL); 358 int retval = 0, size; 359 360 if (!data) { 361 err("bcm5974: out of memory"); 362 retval = -ENOMEM; 363 goto out; 364 } 365 366 /* read configuration */ 367 size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 368 BCM5974_WELLSPRING_MODE_READ_REQUEST_ID, 369 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 370 BCM5974_WELLSPRING_MODE_REQUEST_VALUE, 371 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); 372 373 if (size != 8) { 374 err("bcm5974: could not read from device"); 375 retval = -EIO; 376 goto out; 377 } 378 379 /* apply the mode switch */ 380 data[0] = BCM5974_WELLSPRING_MODE_VENDOR_VALUE; 381 382 /* write configuration */ 383 size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 384 BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID, 385 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 386 BCM5974_WELLSPRING_MODE_REQUEST_VALUE, 387 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); 388 389 if (size != 8) { 390 err("bcm5974: could not write to device"); 391 retval = -EIO; 392 goto out; 393 } 394 395 dprintk(2, "bcm5974: switched to wellspring mode.\n"); 396 397 out: 398 kfree(data); 399 return retval; 400 } 401 402 static void bcm5974_irq_button(struct urb *urb) 403 { 404 struct bcm5974 *dev = urb->context; 405 int error; 406 407 switch (urb->status) { 408 case 0: 409 break; 410 case -EOVERFLOW: 411 case -ECONNRESET: 412 case -ENOENT: 413 case -ESHUTDOWN: 414 dbg("bcm5974: button urb shutting down: %d", urb->status); 415 return; 416 default: 417 dbg("bcm5974: button urb status: %d", urb->status); 418 goto exit; 419 } 420 421 if (report_bt_state(dev, dev->bt_urb->actual_length)) 422 dprintk(1, "bcm5974: bad button package, length: %d\n", 423 dev->bt_urb->actual_length); 424 425 exit: 426 error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC); 427 if (error) 428 err("bcm5974: button urb failed: %d", error); 429 } 430 431 static void bcm5974_irq_trackpad(struct urb *urb) 432 { 433 struct bcm5974 *dev = urb->context; 434 int error; 435 436 switch (urb->status) { 437 case 0: 438 break; 439 case -EOVERFLOW: 440 case -ECONNRESET: 441 case -ENOENT: 442 case -ESHUTDOWN: 443 dbg("bcm5974: trackpad urb shutting down: %d", urb->status); 444 return; 445 default: 446 dbg("bcm5974: trackpad urb status: %d", urb->status); 447 goto exit; 448 } 449 450 /* control response ignored */ 451 if (dev->tp_urb->actual_length == 2) 452 goto exit; 453 454 if (report_tp_state(dev, dev->tp_urb->actual_length)) 455 dprintk(1, "bcm5974: bad trackpad package, length: %d\n", 456 dev->tp_urb->actual_length); 457 458 exit: 459 error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC); 460 if (error) 461 err("bcm5974: trackpad urb failed: %d", error); 462 } 463 464 /* 465 * The Wellspring trackpad, like many recent Apple trackpads, share 466 * the usb device with the keyboard. Since keyboards are usually 467 * handled by the HID system, the device ends up being handled by two 468 * modules. Setting up the device therefore becomes slightly 469 * complicated. To enable multitouch features, a mode switch is 470 * required, which is usually applied via the control interface of the 471 * device. It can be argued where this switch should take place. In 472 * some drivers, like appletouch, the switch is made during 473 * probe. However, the hid module may also alter the state of the 474 * device, resulting in trackpad malfunction under certain 475 * circumstances. To get around this problem, there is at least one 476 * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to 477 * recieve a reset_resume request rather than the normal resume. 478 * Since the implementation of reset_resume is equal to mode switch 479 * plus start_traffic, it seems easier to always do the switch when 480 * starting traffic on the device. 481 */ 482 static int bcm5974_start_traffic(struct bcm5974 *dev) 483 { 484 if (bcm5974_wellspring_mode(dev)) { 485 dprintk(1, "bcm5974: mode switch failed\n"); 486 goto error; 487 } 488 489 if (usb_submit_urb(dev->bt_urb, GFP_KERNEL)) 490 goto error; 491 492 if (usb_submit_urb(dev->tp_urb, GFP_KERNEL)) 493 goto err_kill_bt; 494 495 return 0; 496 497 err_kill_bt: 498 usb_kill_urb(dev->bt_urb); 499 error: 500 return -EIO; 501 } 502 503 static void bcm5974_pause_traffic(struct bcm5974 *dev) 504 { 505 usb_kill_urb(dev->tp_urb); 506 usb_kill_urb(dev->bt_urb); 507 } 508 509 /* 510 * The code below implements open/close and manual suspend/resume. 511 * All functions may be called in random order. 512 * 513 * Opening a suspended device fails with EACCES - permission denied. 514 * 515 * Failing a resume leaves the device resumed but closed. 516 */ 517 static int bcm5974_open(struct input_dev *input) 518 { 519 struct bcm5974 *dev = input_get_drvdata(input); 520 int error; 521 522 error = usb_autopm_get_interface(dev->intf); 523 if (error) 524 return error; 525 526 mutex_lock(&dev->pm_mutex); 527 528 error = bcm5974_start_traffic(dev); 529 if (!error) 530 dev->opened = 1; 531 532 mutex_unlock(&dev->pm_mutex); 533 534 if (error) 535 usb_autopm_put_interface(dev->intf); 536 537 return error; 538 } 539 540 static void bcm5974_close(struct input_dev *input) 541 { 542 struct bcm5974 *dev = input_get_drvdata(input); 543 544 mutex_lock(&dev->pm_mutex); 545 546 bcm5974_pause_traffic(dev); 547 dev->opened = 0; 548 549 mutex_unlock(&dev->pm_mutex); 550 551 usb_autopm_put_interface(dev->intf); 552 } 553 554 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message) 555 { 556 struct bcm5974 *dev = usb_get_intfdata(iface); 557 558 mutex_lock(&dev->pm_mutex); 559 560 if (dev->opened) 561 bcm5974_pause_traffic(dev); 562 563 mutex_unlock(&dev->pm_mutex); 564 565 return 0; 566 } 567 568 static int bcm5974_resume(struct usb_interface *iface) 569 { 570 struct bcm5974 *dev = usb_get_intfdata(iface); 571 int error = 0; 572 573 mutex_lock(&dev->pm_mutex); 574 575 if (dev->opened) 576 error = bcm5974_start_traffic(dev); 577 578 mutex_unlock(&dev->pm_mutex); 579 580 return error; 581 } 582 583 static int bcm5974_probe(struct usb_interface *iface, 584 const struct usb_device_id *id) 585 { 586 struct usb_device *udev = interface_to_usbdev(iface); 587 const struct bcm5974_config *cfg; 588 struct bcm5974 *dev; 589 struct input_dev *input_dev; 590 int error = -ENOMEM; 591 592 /* find the product index */ 593 cfg = bcm5974_get_config(udev); 594 595 /* allocate memory for our device state and initialize it */ 596 dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL); 597 input_dev = input_allocate_device(); 598 if (!dev || !input_dev) { 599 err("bcm5974: out of memory"); 600 goto err_free_devs; 601 } 602 603 dev->udev = udev; 604 dev->intf = iface; 605 dev->input = input_dev; 606 dev->cfg = *cfg; 607 mutex_init(&dev->pm_mutex); 608 609 /* setup urbs */ 610 dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL); 611 if (!dev->bt_urb) 612 goto err_free_devs; 613 614 dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL); 615 if (!dev->tp_urb) 616 goto err_free_bt_urb; 617 618 dev->bt_data = usb_buffer_alloc(dev->udev, 619 dev->cfg.bt_datalen, GFP_KERNEL, 620 &dev->bt_urb->transfer_dma); 621 if (!dev->bt_data) 622 goto err_free_urb; 623 624 dev->tp_data = usb_buffer_alloc(dev->udev, 625 dev->cfg.tp_datalen, GFP_KERNEL, 626 &dev->tp_urb->transfer_dma); 627 if (!dev->tp_data) 628 goto err_free_bt_buffer; 629 630 usb_fill_int_urb(dev->bt_urb, udev, 631 usb_rcvintpipe(udev, cfg->bt_ep), 632 dev->bt_data, dev->cfg.bt_datalen, 633 bcm5974_irq_button, dev, 1); 634 635 usb_fill_int_urb(dev->tp_urb, udev, 636 usb_rcvintpipe(udev, cfg->tp_ep), 637 dev->tp_data, dev->cfg.tp_datalen, 638 bcm5974_irq_trackpad, dev, 1); 639 640 /* create bcm5974 device */ 641 usb_make_path(udev, dev->phys, sizeof(dev->phys)); 642 strlcat(dev->phys, "/input0", sizeof(dev->phys)); 643 644 input_dev->name = "bcm5974"; 645 input_dev->phys = dev->phys; 646 usb_to_input_id(dev->udev, &input_dev->id); 647 input_dev->dev.parent = &iface->dev; 648 649 input_set_drvdata(input_dev, dev); 650 651 input_dev->open = bcm5974_open; 652 input_dev->close = bcm5974_close; 653 654 setup_events_to_report(input_dev, cfg); 655 656 error = input_register_device(dev->input); 657 if (error) 658 goto err_free_buffer; 659 660 /* save our data pointer in this interface device */ 661 usb_set_intfdata(iface, dev); 662 663 return 0; 664 665 err_free_buffer: 666 usb_buffer_free(dev->udev, dev->cfg.tp_datalen, 667 dev->tp_data, dev->tp_urb->transfer_dma); 668 err_free_bt_buffer: 669 usb_buffer_free(dev->udev, dev->cfg.bt_datalen, 670 dev->bt_data, dev->bt_urb->transfer_dma); 671 err_free_urb: 672 usb_free_urb(dev->tp_urb); 673 err_free_bt_urb: 674 usb_free_urb(dev->bt_urb); 675 err_free_devs: 676 usb_set_intfdata(iface, NULL); 677 input_free_device(input_dev); 678 kfree(dev); 679 return error; 680 } 681 682 static void bcm5974_disconnect(struct usb_interface *iface) 683 { 684 struct bcm5974 *dev = usb_get_intfdata(iface); 685 686 usb_set_intfdata(iface, NULL); 687 688 input_unregister_device(dev->input); 689 usb_buffer_free(dev->udev, dev->cfg.tp_datalen, 690 dev->tp_data, dev->tp_urb->transfer_dma); 691 usb_buffer_free(dev->udev, dev->cfg.bt_datalen, 692 dev->bt_data, dev->bt_urb->transfer_dma); 693 usb_free_urb(dev->tp_urb); 694 usb_free_urb(dev->bt_urb); 695 kfree(dev); 696 } 697 698 static struct usb_driver bcm5974_driver = { 699 .name = "bcm5974", 700 .probe = bcm5974_probe, 701 .disconnect = bcm5974_disconnect, 702 .suspend = bcm5974_suspend, 703 .resume = bcm5974_resume, 704 .reset_resume = bcm5974_resume, 705 .id_table = bcm5974_table, 706 .supports_autosuspend = 1, 707 }; 708 709 static int __init bcm5974_init(void) 710 { 711 return usb_register(&bcm5974_driver); 712 } 713 714 static void __exit bcm5974_exit(void) 715 { 716 usb_deregister(&bcm5974_driver); 717 } 718 719 module_init(bcm5974_init); 720 module_exit(bcm5974_exit); 721 722