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, origin, 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 /* while tracking finger still valid, count all fingers */ 350 if (ptest > PRESSURE_LOW && origin) { 351 abs_p = ptest; 352 abs_w = int2bound(&c->w, raw_w); 353 abs_x = int2bound(&c->x, raw_x - c->x.devmin); 354 abs_y = int2bound(&c->y, c->y.devmax - raw_y); 355 while (raw_n--) { 356 ptest = int2bound(&c->p, 357 raw2int(f->force_major)); 358 if (ptest > PRESSURE_LOW) 359 nmax++; 360 if (ptest > PRESSURE_HIGH) 361 nmin++; 362 f++; 363 } 364 } 365 } 366 367 if (dev->fingers < nmin) 368 dev->fingers = nmin; 369 if (dev->fingers > nmax) 370 dev->fingers = nmax; 371 372 input_report_key(input, BTN_TOUCH, dev->fingers > 0); 373 input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1); 374 input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2); 375 input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers == 3); 376 input_report_key(input, BTN_TOOL_QUADTAP, dev->fingers > 3); 377 378 input_report_abs(input, ABS_PRESSURE, abs_p); 379 input_report_abs(input, ABS_TOOL_WIDTH, abs_w); 380 381 if (abs_p) { 382 input_report_abs(input, ABS_X, abs_x); 383 input_report_abs(input, ABS_Y, abs_y); 384 385 dprintk(8, 386 "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d " 387 "nmin: %d nmax: %d n: %d ibt: %d\n", abs_p, abs_w, 388 abs_x, abs_y, nmin, nmax, dev->fingers, ibt); 389 390 } 391 392 /* type 2 reports button events via ibt only */ 393 if (c->tp_type == TYPE2) 394 input_report_key(input, BTN_LEFT, ibt); 395 396 input_sync(input); 397 398 return 0; 399 } 400 401 /* Wellspring initialization constants */ 402 #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1 403 #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9 404 #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE 0x300 405 #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX 0 406 #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE 0x01 407 #define BCM5974_WELLSPRING_MODE_NORMAL_VALUE 0x08 408 409 static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on) 410 { 411 char *data = kmalloc(8, GFP_KERNEL); 412 int retval = 0, size; 413 414 if (!data) { 415 err("bcm5974: out of memory"); 416 retval = -ENOMEM; 417 goto out; 418 } 419 420 /* read configuration */ 421 size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 422 BCM5974_WELLSPRING_MODE_READ_REQUEST_ID, 423 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 424 BCM5974_WELLSPRING_MODE_REQUEST_VALUE, 425 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); 426 427 if (size != 8) { 428 err("bcm5974: could not read from device"); 429 retval = -EIO; 430 goto out; 431 } 432 433 /* apply the mode switch */ 434 data[0] = on ? 435 BCM5974_WELLSPRING_MODE_VENDOR_VALUE : 436 BCM5974_WELLSPRING_MODE_NORMAL_VALUE; 437 438 /* write configuration */ 439 size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 440 BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID, 441 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 442 BCM5974_WELLSPRING_MODE_REQUEST_VALUE, 443 BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); 444 445 if (size != 8) { 446 err("bcm5974: could not write to device"); 447 retval = -EIO; 448 goto out; 449 } 450 451 dprintk(2, "bcm5974: switched to %s mode.\n", 452 on ? "wellspring" : "normal"); 453 454 out: 455 kfree(data); 456 return retval; 457 } 458 459 static void bcm5974_irq_button(struct urb *urb) 460 { 461 struct bcm5974 *dev = urb->context; 462 int error; 463 464 switch (urb->status) { 465 case 0: 466 break; 467 case -EOVERFLOW: 468 case -ECONNRESET: 469 case -ENOENT: 470 case -ESHUTDOWN: 471 dbg("bcm5974: button urb shutting down: %d", urb->status); 472 return; 473 default: 474 dbg("bcm5974: button urb status: %d", urb->status); 475 goto exit; 476 } 477 478 if (report_bt_state(dev, dev->bt_urb->actual_length)) 479 dprintk(1, "bcm5974: bad button package, length: %d\n", 480 dev->bt_urb->actual_length); 481 482 exit: 483 error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC); 484 if (error) 485 err("bcm5974: button urb failed: %d", error); 486 } 487 488 static void bcm5974_irq_trackpad(struct urb *urb) 489 { 490 struct bcm5974 *dev = urb->context; 491 int error; 492 493 switch (urb->status) { 494 case 0: 495 break; 496 case -EOVERFLOW: 497 case -ECONNRESET: 498 case -ENOENT: 499 case -ESHUTDOWN: 500 dbg("bcm5974: trackpad urb shutting down: %d", urb->status); 501 return; 502 default: 503 dbg("bcm5974: trackpad urb status: %d", urb->status); 504 goto exit; 505 } 506 507 /* control response ignored */ 508 if (dev->tp_urb->actual_length == 2) 509 goto exit; 510 511 if (report_tp_state(dev, dev->tp_urb->actual_length)) 512 dprintk(1, "bcm5974: bad trackpad package, length: %d\n", 513 dev->tp_urb->actual_length); 514 515 exit: 516 error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC); 517 if (error) 518 err("bcm5974: trackpad urb failed: %d", error); 519 } 520 521 /* 522 * The Wellspring trackpad, like many recent Apple trackpads, share 523 * the usb device with the keyboard. Since keyboards are usually 524 * handled by the HID system, the device ends up being handled by two 525 * modules. Setting up the device therefore becomes slightly 526 * complicated. To enable multitouch features, a mode switch is 527 * required, which is usually applied via the control interface of the 528 * device. It can be argued where this switch should take place. In 529 * some drivers, like appletouch, the switch is made during 530 * probe. However, the hid module may also alter the state of the 531 * device, resulting in trackpad malfunction under certain 532 * circumstances. To get around this problem, there is at least one 533 * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to 534 * recieve a reset_resume request rather than the normal resume. 535 * Since the implementation of reset_resume is equal to mode switch 536 * plus start_traffic, it seems easier to always do the switch when 537 * starting traffic on the device. 538 */ 539 static int bcm5974_start_traffic(struct bcm5974 *dev) 540 { 541 if (bcm5974_wellspring_mode(dev, true)) { 542 dprintk(1, "bcm5974: mode switch failed\n"); 543 goto error; 544 } 545 546 if (usb_submit_urb(dev->bt_urb, GFP_KERNEL)) 547 goto error; 548 549 if (usb_submit_urb(dev->tp_urb, GFP_KERNEL)) 550 goto err_kill_bt; 551 552 return 0; 553 554 err_kill_bt: 555 usb_kill_urb(dev->bt_urb); 556 error: 557 return -EIO; 558 } 559 560 static void bcm5974_pause_traffic(struct bcm5974 *dev) 561 { 562 usb_kill_urb(dev->tp_urb); 563 usb_kill_urb(dev->bt_urb); 564 bcm5974_wellspring_mode(dev, false); 565 } 566 567 /* 568 * The code below implements open/close and manual suspend/resume. 569 * All functions may be called in random order. 570 * 571 * Opening a suspended device fails with EACCES - permission denied. 572 * 573 * Failing a resume leaves the device resumed but closed. 574 */ 575 static int bcm5974_open(struct input_dev *input) 576 { 577 struct bcm5974 *dev = input_get_drvdata(input); 578 int error; 579 580 error = usb_autopm_get_interface(dev->intf); 581 if (error) 582 return error; 583 584 mutex_lock(&dev->pm_mutex); 585 586 error = bcm5974_start_traffic(dev); 587 if (!error) 588 dev->opened = 1; 589 590 mutex_unlock(&dev->pm_mutex); 591 592 if (error) 593 usb_autopm_put_interface(dev->intf); 594 595 return error; 596 } 597 598 static void bcm5974_close(struct input_dev *input) 599 { 600 struct bcm5974 *dev = input_get_drvdata(input); 601 602 mutex_lock(&dev->pm_mutex); 603 604 bcm5974_pause_traffic(dev); 605 dev->opened = 0; 606 607 mutex_unlock(&dev->pm_mutex); 608 609 usb_autopm_put_interface(dev->intf); 610 } 611 612 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message) 613 { 614 struct bcm5974 *dev = usb_get_intfdata(iface); 615 616 mutex_lock(&dev->pm_mutex); 617 618 if (dev->opened) 619 bcm5974_pause_traffic(dev); 620 621 mutex_unlock(&dev->pm_mutex); 622 623 return 0; 624 } 625 626 static int bcm5974_resume(struct usb_interface *iface) 627 { 628 struct bcm5974 *dev = usb_get_intfdata(iface); 629 int error = 0; 630 631 mutex_lock(&dev->pm_mutex); 632 633 if (dev->opened) 634 error = bcm5974_start_traffic(dev); 635 636 mutex_unlock(&dev->pm_mutex); 637 638 return error; 639 } 640 641 static int bcm5974_probe(struct usb_interface *iface, 642 const struct usb_device_id *id) 643 { 644 struct usb_device *udev = interface_to_usbdev(iface); 645 const struct bcm5974_config *cfg; 646 struct bcm5974 *dev; 647 struct input_dev *input_dev; 648 int error = -ENOMEM; 649 650 /* find the product index */ 651 cfg = bcm5974_get_config(udev); 652 653 /* allocate memory for our device state and initialize it */ 654 dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL); 655 input_dev = input_allocate_device(); 656 if (!dev || !input_dev) { 657 err("bcm5974: out of memory"); 658 goto err_free_devs; 659 } 660 661 dev->udev = udev; 662 dev->intf = iface; 663 dev->input = input_dev; 664 dev->cfg = *cfg; 665 mutex_init(&dev->pm_mutex); 666 667 /* setup urbs */ 668 dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL); 669 if (!dev->bt_urb) 670 goto err_free_devs; 671 672 dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL); 673 if (!dev->tp_urb) 674 goto err_free_bt_urb; 675 676 dev->bt_data = usb_buffer_alloc(dev->udev, 677 dev->cfg.bt_datalen, GFP_KERNEL, 678 &dev->bt_urb->transfer_dma); 679 if (!dev->bt_data) 680 goto err_free_urb; 681 682 dev->tp_data = usb_buffer_alloc(dev->udev, 683 dev->cfg.tp_datalen, GFP_KERNEL, 684 &dev->tp_urb->transfer_dma); 685 if (!dev->tp_data) 686 goto err_free_bt_buffer; 687 688 usb_fill_int_urb(dev->bt_urb, udev, 689 usb_rcvintpipe(udev, cfg->bt_ep), 690 dev->bt_data, dev->cfg.bt_datalen, 691 bcm5974_irq_button, dev, 1); 692 693 usb_fill_int_urb(dev->tp_urb, udev, 694 usb_rcvintpipe(udev, cfg->tp_ep), 695 dev->tp_data, dev->cfg.tp_datalen, 696 bcm5974_irq_trackpad, dev, 1); 697 698 /* create bcm5974 device */ 699 usb_make_path(udev, dev->phys, sizeof(dev->phys)); 700 strlcat(dev->phys, "/input0", sizeof(dev->phys)); 701 702 input_dev->name = "bcm5974"; 703 input_dev->phys = dev->phys; 704 usb_to_input_id(dev->udev, &input_dev->id); 705 /* report driver capabilities via the version field */ 706 input_dev->id.version = cfg->caps; 707 input_dev->dev.parent = &iface->dev; 708 709 input_set_drvdata(input_dev, dev); 710 711 input_dev->open = bcm5974_open; 712 input_dev->close = bcm5974_close; 713 714 setup_events_to_report(input_dev, cfg); 715 716 error = input_register_device(dev->input); 717 if (error) 718 goto err_free_buffer; 719 720 /* save our data pointer in this interface device */ 721 usb_set_intfdata(iface, dev); 722 723 return 0; 724 725 err_free_buffer: 726 usb_buffer_free(dev->udev, dev->cfg.tp_datalen, 727 dev->tp_data, dev->tp_urb->transfer_dma); 728 err_free_bt_buffer: 729 usb_buffer_free(dev->udev, dev->cfg.bt_datalen, 730 dev->bt_data, dev->bt_urb->transfer_dma); 731 err_free_urb: 732 usb_free_urb(dev->tp_urb); 733 err_free_bt_urb: 734 usb_free_urb(dev->bt_urb); 735 err_free_devs: 736 usb_set_intfdata(iface, NULL); 737 input_free_device(input_dev); 738 kfree(dev); 739 return error; 740 } 741 742 static void bcm5974_disconnect(struct usb_interface *iface) 743 { 744 struct bcm5974 *dev = usb_get_intfdata(iface); 745 746 usb_set_intfdata(iface, NULL); 747 748 input_unregister_device(dev->input); 749 usb_buffer_free(dev->udev, dev->cfg.tp_datalen, 750 dev->tp_data, dev->tp_urb->transfer_dma); 751 usb_buffer_free(dev->udev, dev->cfg.bt_datalen, 752 dev->bt_data, dev->bt_urb->transfer_dma); 753 usb_free_urb(dev->tp_urb); 754 usb_free_urb(dev->bt_urb); 755 kfree(dev); 756 } 757 758 static struct usb_driver bcm5974_driver = { 759 .name = "bcm5974", 760 .probe = bcm5974_probe, 761 .disconnect = bcm5974_disconnect, 762 .suspend = bcm5974_suspend, 763 .resume = bcm5974_resume, 764 .reset_resume = bcm5974_resume, 765 .id_table = bcm5974_table, 766 .supports_autosuspend = 1, 767 }; 768 769 static int __init bcm5974_init(void) 770 { 771 return usb_register(&bcm5974_driver); 772 } 773 774 static void __exit bcm5974_exit(void) 775 { 776 usb_deregister(&bcm5974_driver); 777 } 778 779 module_init(bcm5974_init); 780 module_exit(bcm5974_exit); 781 782