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 #define BCM5974_WELLSPRING_MODE_NORMAL_VALUE 0x08 355 356 static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on) 357 { 358 char *data = kmalloc(8, GFP_KERNEL); 359 int retval = 0, size; 360 361 if (!data) { 362 err("bcm5974: out of memory"); 363 retval = -ENOMEM; 364 goto out; 365 } 366 367 /* read configuration */ 368 size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 369 BCM5974_WELLSPRING_MODE_READ_REQUEST_ID, 370 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 371 BCM5974_WELLSPRING_MODE_REQUEST_VALUE, 372 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); 373 374 if (size != 8) { 375 err("bcm5974: could not read from device"); 376 retval = -EIO; 377 goto out; 378 } 379 380 /* apply the mode switch */ 381 data[0] = on ? 382 BCM5974_WELLSPRING_MODE_VENDOR_VALUE : 383 BCM5974_WELLSPRING_MODE_NORMAL_VALUE; 384 385 /* write configuration */ 386 size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 387 BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID, 388 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 389 BCM5974_WELLSPRING_MODE_REQUEST_VALUE, 390 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); 391 392 if (size != 8) { 393 err("bcm5974: could not write to device"); 394 retval = -EIO; 395 goto out; 396 } 397 398 dprintk(2, "bcm5974: switched to %s mode.\n", 399 on ? "wellspring" : "normal"); 400 401 out: 402 kfree(data); 403 return retval; 404 } 405 406 static void bcm5974_irq_button(struct urb *urb) 407 { 408 struct bcm5974 *dev = urb->context; 409 int error; 410 411 switch (urb->status) { 412 case 0: 413 break; 414 case -EOVERFLOW: 415 case -ECONNRESET: 416 case -ENOENT: 417 case -ESHUTDOWN: 418 dbg("bcm5974: button urb shutting down: %d", urb->status); 419 return; 420 default: 421 dbg("bcm5974: button urb status: %d", urb->status); 422 goto exit; 423 } 424 425 if (report_bt_state(dev, dev->bt_urb->actual_length)) 426 dprintk(1, "bcm5974: bad button package, length: %d\n", 427 dev->bt_urb->actual_length); 428 429 exit: 430 error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC); 431 if (error) 432 err("bcm5974: button urb failed: %d", error); 433 } 434 435 static void bcm5974_irq_trackpad(struct urb *urb) 436 { 437 struct bcm5974 *dev = urb->context; 438 int error; 439 440 switch (urb->status) { 441 case 0: 442 break; 443 case -EOVERFLOW: 444 case -ECONNRESET: 445 case -ENOENT: 446 case -ESHUTDOWN: 447 dbg("bcm5974: trackpad urb shutting down: %d", urb->status); 448 return; 449 default: 450 dbg("bcm5974: trackpad urb status: %d", urb->status); 451 goto exit; 452 } 453 454 /* control response ignored */ 455 if (dev->tp_urb->actual_length == 2) 456 goto exit; 457 458 if (report_tp_state(dev, dev->tp_urb->actual_length)) 459 dprintk(1, "bcm5974: bad trackpad package, length: %d\n", 460 dev->tp_urb->actual_length); 461 462 exit: 463 error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC); 464 if (error) 465 err("bcm5974: trackpad urb failed: %d", error); 466 } 467 468 /* 469 * The Wellspring trackpad, like many recent Apple trackpads, share 470 * the usb device with the keyboard. Since keyboards are usually 471 * handled by the HID system, the device ends up being handled by two 472 * modules. Setting up the device therefore becomes slightly 473 * complicated. To enable multitouch features, a mode switch is 474 * required, which is usually applied via the control interface of the 475 * device. It can be argued where this switch should take place. In 476 * some drivers, like appletouch, the switch is made during 477 * probe. However, the hid module may also alter the state of the 478 * device, resulting in trackpad malfunction under certain 479 * circumstances. To get around this problem, there is at least one 480 * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to 481 * recieve a reset_resume request rather than the normal resume. 482 * Since the implementation of reset_resume is equal to mode switch 483 * plus start_traffic, it seems easier to always do the switch when 484 * starting traffic on the device. 485 */ 486 static int bcm5974_start_traffic(struct bcm5974 *dev) 487 { 488 if (bcm5974_wellspring_mode(dev, true)) { 489 dprintk(1, "bcm5974: mode switch failed\n"); 490 goto error; 491 } 492 493 if (usb_submit_urb(dev->bt_urb, GFP_KERNEL)) 494 goto error; 495 496 if (usb_submit_urb(dev->tp_urb, GFP_KERNEL)) 497 goto err_kill_bt; 498 499 return 0; 500 501 err_kill_bt: 502 usb_kill_urb(dev->bt_urb); 503 error: 504 return -EIO; 505 } 506 507 static void bcm5974_pause_traffic(struct bcm5974 *dev) 508 { 509 usb_kill_urb(dev->tp_urb); 510 usb_kill_urb(dev->bt_urb); 511 bcm5974_wellspring_mode(dev, false); 512 } 513 514 /* 515 * The code below implements open/close and manual suspend/resume. 516 * All functions may be called in random order. 517 * 518 * Opening a suspended device fails with EACCES - permission denied. 519 * 520 * Failing a resume leaves the device resumed but closed. 521 */ 522 static int bcm5974_open(struct input_dev *input) 523 { 524 struct bcm5974 *dev = input_get_drvdata(input); 525 int error; 526 527 error = usb_autopm_get_interface(dev->intf); 528 if (error) 529 return error; 530 531 mutex_lock(&dev->pm_mutex); 532 533 error = bcm5974_start_traffic(dev); 534 if (!error) 535 dev->opened = 1; 536 537 mutex_unlock(&dev->pm_mutex); 538 539 if (error) 540 usb_autopm_put_interface(dev->intf); 541 542 return error; 543 } 544 545 static void bcm5974_close(struct input_dev *input) 546 { 547 struct bcm5974 *dev = input_get_drvdata(input); 548 549 mutex_lock(&dev->pm_mutex); 550 551 bcm5974_pause_traffic(dev); 552 dev->opened = 0; 553 554 mutex_unlock(&dev->pm_mutex); 555 556 usb_autopm_put_interface(dev->intf); 557 } 558 559 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message) 560 { 561 struct bcm5974 *dev = usb_get_intfdata(iface); 562 563 mutex_lock(&dev->pm_mutex); 564 565 if (dev->opened) 566 bcm5974_pause_traffic(dev); 567 568 mutex_unlock(&dev->pm_mutex); 569 570 return 0; 571 } 572 573 static int bcm5974_resume(struct usb_interface *iface) 574 { 575 struct bcm5974 *dev = usb_get_intfdata(iface); 576 int error = 0; 577 578 mutex_lock(&dev->pm_mutex); 579 580 if (dev->opened) 581 error = bcm5974_start_traffic(dev); 582 583 mutex_unlock(&dev->pm_mutex); 584 585 return error; 586 } 587 588 static int bcm5974_probe(struct usb_interface *iface, 589 const struct usb_device_id *id) 590 { 591 struct usb_device *udev = interface_to_usbdev(iface); 592 const struct bcm5974_config *cfg; 593 struct bcm5974 *dev; 594 struct input_dev *input_dev; 595 int error = -ENOMEM; 596 597 /* find the product index */ 598 cfg = bcm5974_get_config(udev); 599 600 /* allocate memory for our device state and initialize it */ 601 dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL); 602 input_dev = input_allocate_device(); 603 if (!dev || !input_dev) { 604 err("bcm5974: out of memory"); 605 goto err_free_devs; 606 } 607 608 dev->udev = udev; 609 dev->intf = iface; 610 dev->input = input_dev; 611 dev->cfg = *cfg; 612 mutex_init(&dev->pm_mutex); 613 614 /* setup urbs */ 615 dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL); 616 if (!dev->bt_urb) 617 goto err_free_devs; 618 619 dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL); 620 if (!dev->tp_urb) 621 goto err_free_bt_urb; 622 623 dev->bt_data = usb_buffer_alloc(dev->udev, 624 dev->cfg.bt_datalen, GFP_KERNEL, 625 &dev->bt_urb->transfer_dma); 626 if (!dev->bt_data) 627 goto err_free_urb; 628 629 dev->tp_data = usb_buffer_alloc(dev->udev, 630 dev->cfg.tp_datalen, GFP_KERNEL, 631 &dev->tp_urb->transfer_dma); 632 if (!dev->tp_data) 633 goto err_free_bt_buffer; 634 635 usb_fill_int_urb(dev->bt_urb, udev, 636 usb_rcvintpipe(udev, cfg->bt_ep), 637 dev->bt_data, dev->cfg.bt_datalen, 638 bcm5974_irq_button, dev, 1); 639 640 usb_fill_int_urb(dev->tp_urb, udev, 641 usb_rcvintpipe(udev, cfg->tp_ep), 642 dev->tp_data, dev->cfg.tp_datalen, 643 bcm5974_irq_trackpad, dev, 1); 644 645 /* create bcm5974 device */ 646 usb_make_path(udev, dev->phys, sizeof(dev->phys)); 647 strlcat(dev->phys, "/input0", sizeof(dev->phys)); 648 649 input_dev->name = "bcm5974"; 650 input_dev->phys = dev->phys; 651 usb_to_input_id(dev->udev, &input_dev->id); 652 input_dev->dev.parent = &iface->dev; 653 654 input_set_drvdata(input_dev, dev); 655 656 input_dev->open = bcm5974_open; 657 input_dev->close = bcm5974_close; 658 659 setup_events_to_report(input_dev, cfg); 660 661 error = input_register_device(dev->input); 662 if (error) 663 goto err_free_buffer; 664 665 /* save our data pointer in this interface device */ 666 usb_set_intfdata(iface, dev); 667 668 return 0; 669 670 err_free_buffer: 671 usb_buffer_free(dev->udev, dev->cfg.tp_datalen, 672 dev->tp_data, dev->tp_urb->transfer_dma); 673 err_free_bt_buffer: 674 usb_buffer_free(dev->udev, dev->cfg.bt_datalen, 675 dev->bt_data, dev->bt_urb->transfer_dma); 676 err_free_urb: 677 usb_free_urb(dev->tp_urb); 678 err_free_bt_urb: 679 usb_free_urb(dev->bt_urb); 680 err_free_devs: 681 usb_set_intfdata(iface, NULL); 682 input_free_device(input_dev); 683 kfree(dev); 684 return error; 685 } 686 687 static void bcm5974_disconnect(struct usb_interface *iface) 688 { 689 struct bcm5974 *dev = usb_get_intfdata(iface); 690 691 usb_set_intfdata(iface, NULL); 692 693 input_unregister_device(dev->input); 694 usb_buffer_free(dev->udev, dev->cfg.tp_datalen, 695 dev->tp_data, dev->tp_urb->transfer_dma); 696 usb_buffer_free(dev->udev, dev->cfg.bt_datalen, 697 dev->bt_data, dev->bt_urb->transfer_dma); 698 usb_free_urb(dev->tp_urb); 699 usb_free_urb(dev->bt_urb); 700 kfree(dev); 701 } 702 703 static struct usb_driver bcm5974_driver = { 704 .name = "bcm5974", 705 .probe = bcm5974_probe, 706 .disconnect = bcm5974_disconnect, 707 .suspend = bcm5974_suspend, 708 .resume = bcm5974_resume, 709 .reset_resume = bcm5974_resume, 710 .id_table = bcm5974_table, 711 .supports_autosuspend = 1, 712 }; 713 714 static int __init bcm5974_init(void) 715 { 716 return usb_register(&bcm5974_driver); 717 } 718 719 static void __exit bcm5974_exit(void) 720 { 721 usb_deregister(&bcm5974_driver); 722 } 723 724 module_init(bcm5974_init); 725 module_exit(bcm5974_exit); 726 727