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 /* 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 58 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 \ 67 } 68 69 /* table of devices that work with this driver */ 70 static const struct usb_device_id bcm5974_table[] = { 71 /* MacbookAir1.1 */ 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), 79 /* Macbook5,1 */ 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 */ 84 {} 85 }; 86 MODULE_DEVICE_TABLE(usb, bcm5974_table); 87 88 MODULE_AUTHOR("Henrik Rydberg"); 89 MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver"); 90 MODULE_LICENSE("GPL"); 91 92 #define dprintk(level, format, a...)\ 93 { if (debug >= level) printk(KERN_DEBUG format, ##a); } 94 95 static int debug = 1; 96 module_param(debug, int, 0644); 97 MODULE_PARM_DESC(debug, "Activate debugging output"); 98 99 /* button data structure */ 100 struct bt_data { 101 u8 unknown1; /* constant */ 102 u8 button; /* left button */ 103 u8 rel_x; /* relative x coordinate */ 104 u8 rel_y; /* relative y coordinate */ 105 }; 106 107 /* trackpad header types */ 108 enum tp_type { 109 TYPE1, /* plain trackpad */ 110 TYPE2 /* button integrated in trackpad */ 111 }; 112 113 /* trackpad finger data offsets, le16-aligned */ 114 #define FINGER_TYPE1 (13 * sizeof(__le16)) 115 #define FINGER_TYPE2 (15 * sizeof(__le16)) 116 117 /* trackpad button data offsets */ 118 #define BUTTON_TYPE2 15 119 120 /* list of device capability bits */ 121 #define HAS_INTEGRATED_BUTTON 1 122 123 /* trackpad finger structure, le16-aligned */ 124 struct tp_finger { 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))); 138 139 /* 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) 142 143 /* device-specific parameters */ 144 struct bcm5974_param { 145 int dim; /* logical dimension */ 146 int fuzz; /* logical noise value */ 147 int devmin; /* device minimum reading */ 148 int devmax; /* device maximum reading */ 149 }; 150 151 /* device-specific configuration */ 152 struct bcm5974_config { 153 int ansi, iso, jis; /* the product id of this device */ 154 int caps; /* device capability bitmask */ 155 int bt_ep; /* the endpoint of the button interface */ 156 int bt_datalen; /* data length of the button interface */ 157 int tp_ep; /* the endpoint of the trackpad interface */ 158 enum tp_type tp_type; /* type of trackpad interface */ 159 int tp_offset; /* offset to trackpad finger data */ 160 int tp_datalen; /* data length of the trackpad interface */ 161 struct bcm5974_param p; /* finger pressure limits */ 162 struct bcm5974_param w; /* finger width limits */ 163 struct bcm5974_param x; /* horizontal limits */ 164 struct bcm5974_param y; /* vertical limits */ 165 }; 166 167 /* logical device structure */ 168 struct bcm5974 { 169 char phys[64]; 170 struct usb_device *udev; /* usb device */ 171 struct usb_interface *intf; /* our interface */ 172 struct input_dev *input; /* input dev */ 173 struct bcm5974_config cfg; /* device configuration */ 174 struct mutex pm_mutex; /* serialize access to open/suspend */ 175 int opened; /* 1: opened, 0: closed */ 176 struct urb *bt_urb; /* button usb request block */ 177 struct bt_data *bt_data; /* button transferred data */ 178 struct urb *tp_urb; /* trackpad usb request block */ 179 u8 *tp_data; /* trackpad transferred data */ 180 int fingers; /* number of fingers on trackpad */ 181 }; 182 183 /* logical dimensions */ 184 #define DIM_PRESSURE 256 /* maximum finger pressure */ 185 #define DIM_WIDTH 16 /* maximum finger width */ 186 #define DIM_X 1280 /* maximum trackpad x value */ 187 #define DIM_Y 800 /* maximum trackpad y value */ 188 189 /* logical signal quality */ 190 #define SN_PRESSURE 45 /* pressure signal-to-noise ratio */ 191 #define SN_WIDTH 100 /* width signal-to-noise ratio */ 192 #define SN_COORD 250 /* coordinate signal-to-noise ratio */ 193 194 /* pressure thresholds */ 195 #define PRESSURE_LOW (2 * DIM_PRESSURE / SN_PRESSURE) 196 #define PRESSURE_HIGH (3 * PRESSURE_LOW) 197 198 /* device constants */ 199 static const struct bcm5974_config bcm5974_config_table[] = { 200 { 201 USB_DEVICE_ID_APPLE_WELLSPRING_ANSI, 202 USB_DEVICE_ID_APPLE_WELLSPRING_ISO, 203 USB_DEVICE_ID_APPLE_WELLSPRING_JIS, 204 0, 205 0x84, sizeof(struct bt_data), 206 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS, 207 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, 208 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, 209 { DIM_X, DIM_X / SN_COORD, -4824, 5342 }, 210 { DIM_Y, DIM_Y / SN_COORD, -172, 5820 } 211 }, 212 { 213 USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI, 214 USB_DEVICE_ID_APPLE_WELLSPRING2_ISO, 215 USB_DEVICE_ID_APPLE_WELLSPRING2_JIS, 216 0, 217 0x84, sizeof(struct bt_data), 218 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS, 219 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, 220 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, 221 { DIM_X, DIM_X / SN_COORD, -4824, 4824 }, 222 { DIM_Y, DIM_Y / SN_COORD, -172, 4290 } 223 }, 224 { 225 USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI, 226 USB_DEVICE_ID_APPLE_WELLSPRING3_ISO, 227 USB_DEVICE_ID_APPLE_WELLSPRING3_JIS, 228 HAS_INTEGRATED_BUTTON, 229 0x84, sizeof(struct bt_data), 230 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS, 231 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 }, 232 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, 233 { DIM_X, DIM_X / SN_COORD, -4460, 5166 }, 234 { DIM_Y, DIM_Y / SN_COORD, -75, 6700 } 235 }, 236 {} 237 }; 238 239 /* return the device-specific configuration by device */ 240 static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev) 241 { 242 u16 id = le16_to_cpu(udev->descriptor.idProduct); 243 const struct bcm5974_config *cfg; 244 245 for (cfg = bcm5974_config_table; cfg->ansi; ++cfg) 246 if (cfg->ansi == id || cfg->iso == id || cfg->jis == id) 247 return cfg; 248 249 return bcm5974_config_table; 250 } 251 252 /* convert 16-bit little endian to signed integer */ 253 static inline int raw2int(__le16 x) 254 { 255 return (signed short)le16_to_cpu(x); 256 } 257 258 /* scale device data to logical dimensions (asserts devmin < devmax) */ 259 static inline int int2scale(const struct bcm5974_param *p, int x) 260 { 261 return x * p->dim / (p->devmax - p->devmin); 262 } 263 264 /* all logical value ranges are [0,dim). */ 265 static inline int int2bound(const struct bcm5974_param *p, int x) 266 { 267 int s = int2scale(p, x); 268 269 return clamp_val(s, 0, p->dim - 1); 270 } 271 272 /* setup which logical events to report */ 273 static void setup_events_to_report(struct input_dev *input_dev, 274 const struct bcm5974_config *cfg) 275 { 276 __set_bit(EV_ABS, input_dev->evbit); 277 278 input_set_abs_params(input_dev, ABS_PRESSURE, 279 0, cfg->p.dim, cfg->p.fuzz, 0); 280 input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 281 0, cfg->w.dim, cfg->w.fuzz, 0); 282 input_set_abs_params(input_dev, ABS_X, 283 0, cfg->x.dim, cfg->x.fuzz, 0); 284 input_set_abs_params(input_dev, ABS_Y, 285 0, cfg->y.dim, cfg->y.fuzz, 0); 286 287 __set_bit(EV_KEY, input_dev->evbit); 288 __set_bit(BTN_TOUCH, input_dev->keybit); 289 __set_bit(BTN_TOOL_FINGER, input_dev->keybit); 290 __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); 291 __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); 292 __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit); 293 __set_bit(BTN_LEFT, input_dev->keybit); 294 } 295 296 /* report button data as logical button state */ 297 static int report_bt_state(struct bcm5974 *dev, int size) 298 { 299 if (size != sizeof(struct bt_data)) 300 return -EIO; 301 302 dprintk(7, 303 "bcm5974: button data: %x %x %x %x\n", 304 dev->bt_data->unknown1, dev->bt_data->button, 305 dev->bt_data->rel_x, dev->bt_data->rel_y); 306 307 input_report_key(dev->input, BTN_LEFT, dev->bt_data->button); 308 input_sync(dev->input); 309 310 return 0; 311 } 312 313 /* report trackpad data as logical trackpad state */ 314 static int report_tp_state(struct bcm5974 *dev, int size) 315 { 316 const struct bcm5974_config *c = &dev->cfg; 317 const struct tp_finger *f; 318 struct input_dev *input = dev->input; 319 int raw_p, raw_w, raw_x, raw_y, raw_n; 320 int ptest = 0, origin = 0, ibt = 0, nmin = 0, nmax = 0; 321 int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0; 322 323 if (size < c->tp_offset || (size - c->tp_offset) % SIZEOF_FINGER != 0) 324 return -EIO; 325 326 /* finger data, le16-aligned */ 327 f = (const struct tp_finger *)(dev->tp_data + c->tp_offset); 328 raw_n = (size - c->tp_offset) / SIZEOF_FINGER; 329 330 /* always track the first finger; when detached, start over */ 331 if (raw_n) { 332 raw_p = raw2int(f->force_major); 333 raw_w = raw2int(f->size_major); 334 raw_x = raw2int(f->abs_x); 335 raw_y = raw2int(f->abs_y); 336 337 dprintk(9, 338 "bcm5974: " 339 "raw: p: %+05d w: %+05d x: %+05d y: %+05d n: %d\n", 340 raw_p, raw_w, raw_x, raw_y, raw_n); 341 342 ptest = int2bound(&c->p, raw_p); 343 origin = raw2int(f->origin); 344 345 /* set the integrated button if applicable */ 346 if (c->tp_type == TYPE2) 347 ibt = raw2int(dev->tp_data[BUTTON_TYPE2]); 348 } 349 350 /* while tracking finger still valid, count all fingers */ 351 if (ptest > PRESSURE_LOW && origin) { 352 abs_p = ptest; 353 abs_w = int2bound(&c->w, raw_w); 354 abs_x = int2bound(&c->x, raw_x - c->x.devmin); 355 abs_y = int2bound(&c->y, c->y.devmax - raw_y); 356 while (raw_n--) { 357 ptest = int2bound(&c->p, raw2int(f->force_major)); 358 if (ptest > PRESSURE_LOW) 359 nmax++; 360 if (ptest > PRESSURE_HIGH) 361 nmin++; 362 f++; 363 } 364 } 365 366 if (dev->fingers < nmin) 367 dev->fingers = nmin; 368 if (dev->fingers > nmax) 369 dev->fingers = nmax; 370 371 input_report_key(input, BTN_TOUCH, dev->fingers > 0); 372 input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1); 373 input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2); 374 input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers == 3); 375 input_report_key(input, BTN_TOOL_QUADTAP, dev->fingers > 3); 376 377 input_report_abs(input, ABS_PRESSURE, abs_p); 378 input_report_abs(input, ABS_TOOL_WIDTH, abs_w); 379 380 if (abs_p) { 381 input_report_abs(input, ABS_X, abs_x); 382 input_report_abs(input, ABS_Y, abs_y); 383 384 dprintk(8, 385 "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d " 386 "nmin: %d nmax: %d n: %d ibt: %d\n", abs_p, abs_w, 387 abs_x, abs_y, nmin, nmax, dev->fingers, ibt); 388 389 } 390 391 /* type 2 reports button events via ibt only */ 392 if (c->tp_type == TYPE2) 393 input_report_key(input, BTN_LEFT, ibt); 394 395 input_sync(input); 396 397 return 0; 398 } 399 400 /* Wellspring initialization constants */ 401 #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1 402 #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9 403 #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE 0x300 404 #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX 0 405 #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE 0x01 406 #define BCM5974_WELLSPRING_MODE_NORMAL_VALUE 0x08 407 408 static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on) 409 { 410 char *data = kmalloc(8, GFP_KERNEL); 411 int retval = 0, size; 412 413 if (!data) { 414 err("bcm5974: out of memory"); 415 retval = -ENOMEM; 416 goto out; 417 } 418 419 /* read configuration */ 420 size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 421 BCM5974_WELLSPRING_MODE_READ_REQUEST_ID, 422 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 423 BCM5974_WELLSPRING_MODE_REQUEST_VALUE, 424 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); 425 426 if (size != 8) { 427 err("bcm5974: could not read from device"); 428 retval = -EIO; 429 goto out; 430 } 431 432 /* apply the mode switch */ 433 data[0] = on ? 434 BCM5974_WELLSPRING_MODE_VENDOR_VALUE : 435 BCM5974_WELLSPRING_MODE_NORMAL_VALUE; 436 437 /* write configuration */ 438 size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 439 BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID, 440 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 441 BCM5974_WELLSPRING_MODE_REQUEST_VALUE, 442 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); 443 444 if (size != 8) { 445 err("bcm5974: could not write to device"); 446 retval = -EIO; 447 goto out; 448 } 449 450 dprintk(2, "bcm5974: switched to %s mode.\n", 451 on ? "wellspring" : "normal"); 452 453 out: 454 kfree(data); 455 return retval; 456 } 457 458 static void bcm5974_irq_button(struct urb *urb) 459 { 460 struct bcm5974 *dev = urb->context; 461 int error; 462 463 switch (urb->status) { 464 case 0: 465 break; 466 case -EOVERFLOW: 467 case -ECONNRESET: 468 case -ENOENT: 469 case -ESHUTDOWN: 470 dbg("bcm5974: button urb shutting down: %d", urb->status); 471 return; 472 default: 473 dbg("bcm5974: button urb status: %d", urb->status); 474 goto exit; 475 } 476 477 if (report_bt_state(dev, dev->bt_urb->actual_length)) 478 dprintk(1, "bcm5974: bad button package, length: %d\n", 479 dev->bt_urb->actual_length); 480 481 exit: 482 error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC); 483 if (error) 484 err("bcm5974: button urb failed: %d", error); 485 } 486 487 static void bcm5974_irq_trackpad(struct urb *urb) 488 { 489 struct bcm5974 *dev = urb->context; 490 int error; 491 492 switch (urb->status) { 493 case 0: 494 break; 495 case -EOVERFLOW: 496 case -ECONNRESET: 497 case -ENOENT: 498 case -ESHUTDOWN: 499 dbg("bcm5974: trackpad urb shutting down: %d", urb->status); 500 return; 501 default: 502 dbg("bcm5974: trackpad urb status: %d", urb->status); 503 goto exit; 504 } 505 506 /* control response ignored */ 507 if (dev->tp_urb->actual_length == 2) 508 goto exit; 509 510 if (report_tp_state(dev, dev->tp_urb->actual_length)) 511 dprintk(1, "bcm5974: bad trackpad package, length: %d\n", 512 dev->tp_urb->actual_length); 513 514 exit: 515 error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC); 516 if (error) 517 err("bcm5974: trackpad urb failed: %d", error); 518 } 519 520 /* 521 * The Wellspring trackpad, like many recent Apple trackpads, share 522 * the usb device with the keyboard. Since keyboards are usually 523 * handled by the HID system, the device ends up being handled by two 524 * modules. Setting up the device therefore becomes slightly 525 * complicated. To enable multitouch features, a mode switch is 526 * required, which is usually applied via the control interface of the 527 * device. It can be argued where this switch should take place. In 528 * some drivers, like appletouch, the switch is made during 529 * probe. However, the hid module may also alter the state of the 530 * device, resulting in trackpad malfunction under certain 531 * circumstances. To get around this problem, there is at least one 532 * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to 533 * recieve a reset_resume request rather than the normal resume. 534 * Since the implementation of reset_resume is equal to mode switch 535 * plus start_traffic, it seems easier to always do the switch when 536 * starting traffic on the device. 537 */ 538 static int bcm5974_start_traffic(struct bcm5974 *dev) 539 { 540 if (bcm5974_wellspring_mode(dev, true)) { 541 dprintk(1, "bcm5974: mode switch failed\n"); 542 goto error; 543 } 544 545 if (usb_submit_urb(dev->bt_urb, GFP_KERNEL)) 546 goto error; 547 548 if (usb_submit_urb(dev->tp_urb, GFP_KERNEL)) 549 goto err_kill_bt; 550 551 return 0; 552 553 err_kill_bt: 554 usb_kill_urb(dev->bt_urb); 555 error: 556 return -EIO; 557 } 558 559 static void bcm5974_pause_traffic(struct bcm5974 *dev) 560 { 561 usb_kill_urb(dev->tp_urb); 562 usb_kill_urb(dev->bt_urb); 563 bcm5974_wellspring_mode(dev, false); 564 } 565 566 /* 567 * The code below implements open/close and manual suspend/resume. 568 * All functions may be called in random order. 569 * 570 * Opening a suspended device fails with EACCES - permission denied. 571 * 572 * Failing a resume leaves the device resumed but closed. 573 */ 574 static int bcm5974_open(struct input_dev *input) 575 { 576 struct bcm5974 *dev = input_get_drvdata(input); 577 int error; 578 579 error = usb_autopm_get_interface(dev->intf); 580 if (error) 581 return error; 582 583 mutex_lock(&dev->pm_mutex); 584 585 error = bcm5974_start_traffic(dev); 586 if (!error) 587 dev->opened = 1; 588 589 mutex_unlock(&dev->pm_mutex); 590 591 if (error) 592 usb_autopm_put_interface(dev->intf); 593 594 return error; 595 } 596 597 static void bcm5974_close(struct input_dev *input) 598 { 599 struct bcm5974 *dev = input_get_drvdata(input); 600 601 mutex_lock(&dev->pm_mutex); 602 603 bcm5974_pause_traffic(dev); 604 dev->opened = 0; 605 606 mutex_unlock(&dev->pm_mutex); 607 608 usb_autopm_put_interface(dev->intf); 609 } 610 611 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message) 612 { 613 struct bcm5974 *dev = usb_get_intfdata(iface); 614 615 mutex_lock(&dev->pm_mutex); 616 617 if (dev->opened) 618 bcm5974_pause_traffic(dev); 619 620 mutex_unlock(&dev->pm_mutex); 621 622 return 0; 623 } 624 625 static int bcm5974_resume(struct usb_interface *iface) 626 { 627 struct bcm5974 *dev = usb_get_intfdata(iface); 628 int error = 0; 629 630 mutex_lock(&dev->pm_mutex); 631 632 if (dev->opened) 633 error = bcm5974_start_traffic(dev); 634 635 mutex_unlock(&dev->pm_mutex); 636 637 return error; 638 } 639 640 static int bcm5974_probe(struct usb_interface *iface, 641 const struct usb_device_id *id) 642 { 643 struct usb_device *udev = interface_to_usbdev(iface); 644 const struct bcm5974_config *cfg; 645 struct bcm5974 *dev; 646 struct input_dev *input_dev; 647 int error = -ENOMEM; 648 649 /* find the product index */ 650 cfg = bcm5974_get_config(udev); 651 652 /* allocate memory for our device state and initialize it */ 653 dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL); 654 input_dev = input_allocate_device(); 655 if (!dev || !input_dev) { 656 err("bcm5974: out of memory"); 657 goto err_free_devs; 658 } 659 660 dev->udev = udev; 661 dev->intf = iface; 662 dev->input = input_dev; 663 dev->cfg = *cfg; 664 mutex_init(&dev->pm_mutex); 665 666 /* setup urbs */ 667 dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL); 668 if (!dev->bt_urb) 669 goto err_free_devs; 670 671 dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL); 672 if (!dev->tp_urb) 673 goto err_free_bt_urb; 674 675 dev->bt_data = usb_buffer_alloc(dev->udev, 676 dev->cfg.bt_datalen, GFP_KERNEL, 677 &dev->bt_urb->transfer_dma); 678 if (!dev->bt_data) 679 goto err_free_urb; 680 681 dev->tp_data = usb_buffer_alloc(dev->udev, 682 dev->cfg.tp_datalen, GFP_KERNEL, 683 &dev->tp_urb->transfer_dma); 684 if (!dev->tp_data) 685 goto err_free_bt_buffer; 686 687 usb_fill_int_urb(dev->bt_urb, udev, 688 usb_rcvintpipe(udev, cfg->bt_ep), 689 dev->bt_data, dev->cfg.bt_datalen, 690 bcm5974_irq_button, dev, 1); 691 692 usb_fill_int_urb(dev->tp_urb, udev, 693 usb_rcvintpipe(udev, cfg->tp_ep), 694 dev->tp_data, dev->cfg.tp_datalen, 695 bcm5974_irq_trackpad, dev, 1); 696 697 /* create bcm5974 device */ 698 usb_make_path(udev, dev->phys, sizeof(dev->phys)); 699 strlcat(dev->phys, "/input0", sizeof(dev->phys)); 700 701 input_dev->name = "bcm5974"; 702 input_dev->phys = dev->phys; 703 usb_to_input_id(dev->udev, &input_dev->id); 704 /* report driver capabilities via the version field */ 705 input_dev->id.version = cfg->caps; 706 input_dev->dev.parent = &iface->dev; 707 708 input_set_drvdata(input_dev, dev); 709 710 input_dev->open = bcm5974_open; 711 input_dev->close = bcm5974_close; 712 713 setup_events_to_report(input_dev, cfg); 714 715 error = input_register_device(dev->input); 716 if (error) 717 goto err_free_buffer; 718 719 /* save our data pointer in this interface device */ 720 usb_set_intfdata(iface, dev); 721 722 return 0; 723 724 err_free_buffer: 725 usb_buffer_free(dev->udev, dev->cfg.tp_datalen, 726 dev->tp_data, dev->tp_urb->transfer_dma); 727 err_free_bt_buffer: 728 usb_buffer_free(dev->udev, dev->cfg.bt_datalen, 729 dev->bt_data, dev->bt_urb->transfer_dma); 730 err_free_urb: 731 usb_free_urb(dev->tp_urb); 732 err_free_bt_urb: 733 usb_free_urb(dev->bt_urb); 734 err_free_devs: 735 usb_set_intfdata(iface, NULL); 736 input_free_device(input_dev); 737 kfree(dev); 738 return error; 739 } 740 741 static void bcm5974_disconnect(struct usb_interface *iface) 742 { 743 struct bcm5974 *dev = usb_get_intfdata(iface); 744 745 usb_set_intfdata(iface, NULL); 746 747 input_unregister_device(dev->input); 748 usb_buffer_free(dev->udev, dev->cfg.tp_datalen, 749 dev->tp_data, dev->tp_urb->transfer_dma); 750 usb_buffer_free(dev->udev, dev->cfg.bt_datalen, 751 dev->bt_data, dev->bt_urb->transfer_dma); 752 usb_free_urb(dev->tp_urb); 753 usb_free_urb(dev->bt_urb); 754 kfree(dev); 755 } 756 757 static struct usb_driver bcm5974_driver = { 758 .name = "bcm5974", 759 .probe = bcm5974_probe, 760 .disconnect = bcm5974_disconnect, 761 .suspend = bcm5974_suspend, 762 .resume = bcm5974_resume, 763 .reset_resume = bcm5974_resume, 764 .id_table = bcm5974_table, 765 .supports_autosuspend = 1, 766 }; 767 768 static int __init bcm5974_init(void) 769 { 770 return usb_register(&bcm5974_driver); 771 } 772 773 static void __exit bcm5974_exit(void) 774 { 775 usb_deregister(&bcm5974_driver); 776 } 777 778 module_init(bcm5974_init); 779 module_exit(bcm5974_exit); 780 781