drivers/input/mouse/bcm5974.c

   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;          /* left/right origin? */
 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 };
 163
 164 /* logical dimensions */
 165 #define DIM_PRESSURE    256             /* maximum finger pressure */
 166 #define DIM_WIDTH       16              /* maximum finger width */
 167 #define DIM_X           1280            /* maximum trackpad x value */
 168 #define DIM_Y           800             /* maximum trackpad y value */
 169
 170 /* logical signal quality */
 171 #define SN_PRESSURE     45              /* pressure signal-to-noise ratio */
 172 #define SN_WIDTH        100             /* width signal-to-noise ratio */
 173 #define SN_COORD        250             /* coordinate signal-to-noise ratio */
 174
 175 /* device constants */
 176 static const struct bcm5974_config bcm5974_config_table[] = {
 177         {
 178                 USB_DEVICE_ID_APPLE_WELLSPRING_ANSI,
 179                 USB_DEVICE_ID_APPLE_WELLSPRING_ISO,
 180                 USB_DEVICE_ID_APPLE_WELLSPRING_JIS,
 181                 0x84, sizeof(struct bt_data),
 182                 0x81, sizeof(struct tp_data),
 183                 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 },
 184                 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
 185                 { DIM_X, DIM_X / SN_COORD, -4824, 5342 },
 186                 { DIM_Y, DIM_Y / SN_COORD, -172, 5820 }
 187         },
 188         {
 189                 USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI,
 190                 USB_DEVICE_ID_APPLE_WELLSPRING2_ISO,
 191                 USB_DEVICE_ID_APPLE_WELLSPRING2_JIS,
 192                 0x84, sizeof(struct bt_data),
 193                 0x81, sizeof(struct tp_data),
 194                 { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 },
 195                 { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 },
 196                 { DIM_X, DIM_X / SN_COORD, -4824, 4824 },
 197                 { DIM_Y, DIM_Y / SN_COORD, -172, 4290 }
 198         },
 199         {}
 200 };
 201
 202 /* return the device-specific configuration by device */
 203 static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev)
 204 {
 205         u16 id = le16_to_cpu(udev->descriptor.idProduct);
 206         const struct bcm5974_config *cfg;
 207
 208         for (cfg = bcm5974_config_table; cfg->ansi; ++cfg)
 209                 if (cfg->ansi == id || cfg->iso == id || cfg->jis == id)
 210                         return cfg;
 211
 212         return bcm5974_config_table;
 213 }
 214
 215 /* convert 16-bit little endian to signed integer */
 216 static inline int raw2int(__le16 x)
 217 {
 218         return (signed short)le16_to_cpu(x);
 219 }
 220
 221 /* scale device data to logical dimensions (asserts devmin < devmax) */
 222 static inline int int2scale(const struct bcm5974_param *p, int x)
 223 {
 224         return x * p->dim / (p->devmax - p->devmin);
 225 }
 226
 227 /* all logical value ranges are [0,dim). */
 228 static inline int int2bound(const struct bcm5974_param *p, int x)
 229 {
 230         int s = int2scale(p, x);
 231
 232         return clamp_val(s, 0, p->dim - 1);
 233 }
 234
 235 /* setup which logical events to report */
 236 static void setup_events_to_report(struct input_dev *input_dev,
 237                                    const struct bcm5974_config *cfg)
 238 {
 239         __set_bit(EV_ABS, input_dev->evbit);
 240
 241         input_set_abs_params(input_dev, ABS_PRESSURE,
 242                                 0, cfg->p.dim, cfg->p.fuzz, 0);
 243         input_set_abs_params(input_dev, ABS_TOOL_WIDTH,
 244                                 0, cfg->w.dim, cfg->w.fuzz, 0);
 245         input_set_abs_params(input_dev, ABS_X,
 246                                 0, cfg->x.dim, cfg->x.fuzz, 0);
 247         input_set_abs_params(input_dev, ABS_Y,
 248                                 0, cfg->y.dim, cfg->y.fuzz, 0);
 249
 250         __set_bit(EV_KEY, input_dev->evbit);
 251         __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
 252         __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
 253         __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
 254         __set_bit(BTN_LEFT, input_dev->keybit);
 255 }
 256
 257 /* report button data as logical button state */
 258 static int report_bt_state(struct bcm5974 *dev, int size)
 259 {
 260         if (size != sizeof(struct bt_data))
 261                 return -EIO;
 262
 263         input_report_key(dev->input, BTN_LEFT, dev->bt_data->button);
 264         input_sync(dev->input);
 265
 266         return 0;
 267 }
 268
 269 /* report trackpad data as logical trackpad state */
 270 static int report_tp_state(struct bcm5974 *dev, int size)
 271 {
 272         const struct bcm5974_config *c = &dev->cfg;
 273         const struct tp_finger *f = dev->tp_data->finger;
 274         struct input_dev *input = dev->input;
 275         const int fingers = (size - 26) / 28;
 276         int p = 0, w, x, y, n = 0;
 277
 278         if (size < 26 || (size - 26) % 28 != 0)
 279                 return -EIO;
 280
 281         if (fingers) {
 282                 p = raw2int(f->force_major);
 283                 w = raw2int(f->size_major);
 284                 x = raw2int(f->abs_x);
 285                 y = raw2int(f->abs_y);
 286                 n = p > 0 ? fingers : 0;
 287
 288                 dprintk(9,
 289                         "bcm5974: p: %+05d w: %+05d x: %+05d y: %+05d n: %d\n",
 290                         p, w, x, y, n);
 291
 292                 input_report_abs(input, ABS_TOOL_WIDTH, int2bound(&c->w, w));
 293                 input_report_abs(input, ABS_X, int2bound(&c->x, x - c->x.devmin));
 294                 input_report_abs(input, ABS_Y, int2bound(&c->y, c->y.devmax - y));
 295         }
 296
 297         input_report_abs(input, ABS_PRESSURE, int2bound(&c->p, p));
 298
 299         input_report_key(input, BTN_TOOL_FINGER, n == 1);
 300         input_report_key(input, BTN_TOOL_DOUBLETAP, n == 2);
 301         input_report_key(input, BTN_TOOL_TRIPLETAP, n > 2);
 302
 303         input_sync(input);
 304
 305         return 0;
 306 }
 307
 308 /* Wellspring initialization constants */
 309 #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID         1
 310 #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID        9
 311 #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE           0x300
 312 #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX           0
 313 #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE            0x01
 314
 315 static int bcm5974_wellspring_mode(struct bcm5974 *dev)
 316 {
 317         char *data = kmalloc(8, GFP_KERNEL);
 318         int retval = 0, size;
 319
 320         if (!data) {
 321                 err("bcm5974: out of memory");
 322                 retval = -ENOMEM;
 323                 goto out;
 324         }
 325
 326         /* read configuration */
 327         size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 328                         BCM5974_WELLSPRING_MODE_READ_REQUEST_ID,
 329                         USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 330                         BCM5974_WELLSPRING_MODE_REQUEST_VALUE,
 331                         BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000);
 332
 333         if (size != 8) {
 334                 err("bcm5974: could not read from device");
 335                 retval = -EIO;
 336                 goto out;
 337         }
 338
 339         /* apply the mode switch */
 340         data[0] = BCM5974_WELLSPRING_MODE_VENDOR_VALUE;
 341
 342         /* write configuration */
 343         size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 344                         BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID,
 345                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 346                         BCM5974_WELLSPRING_MODE_REQUEST_VALUE,
 347                         BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000);
 348
 349         if (size != 8) {
 350                 err("bcm5974: could not write to device");
 351                 retval = -EIO;
 352                 goto out;
 353         }
 354
 355         dprintk(2, "bcm5974: switched to wellspring mode.\n");
 356
 357  out:
 358         kfree(data);
 359         return retval;
 360 }
 361
 362 static void bcm5974_irq_button(struct urb *urb)
 363 {
 364         struct bcm5974 *dev = urb->context;
 365         int error;
 366
 367         switch (urb->status) {
 368         case 0:
 369                 break;
 370         case -EOVERFLOW:
 371         case -ECONNRESET:
 372         case -ENOENT:
 373         case -ESHUTDOWN:
 374                 dbg("bcm5974: button urb shutting down: %d", urb->status);
 375                 return;
 376         default:
 377                 dbg("bcm5974: button urb status: %d", urb->status);
 378                 goto exit;
 379         }
 380
 381         if (report_bt_state(dev, dev->bt_urb->actual_length))
 382                 dprintk(1, "bcm5974: bad button package, length: %d\n",
 383                         dev->bt_urb->actual_length);
 384
 385 exit:
 386         error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC);
 387         if (error)
 388                 err("bcm5974: button urb failed: %d", error);
 389 }
 390
 391 static void bcm5974_irq_trackpad(struct urb *urb)
 392 {
 393         struct bcm5974 *dev = urb->context;
 394         int error;
 395
 396         switch (urb->status) {
 397         case 0:
 398                 break;
 399         case -EOVERFLOW:
 400         case -ECONNRESET:
 401         case -ENOENT:
 402         case -ESHUTDOWN:
 403                 dbg("bcm5974: trackpad urb shutting down: %d", urb->status);
 404                 return;
 405         default:
 406                 dbg("bcm5974: trackpad urb status: %d", urb->status);
 407                 goto exit;
 408         }
 409
 410         /* control response ignored */
 411         if (dev->tp_urb->actual_length == 2)
 412                 goto exit;
 413
 414         if (report_tp_state(dev, dev->tp_urb->actual_length))
 415                 dprintk(1, "bcm5974: bad trackpad package, length: %d\n",
 416                         dev->tp_urb->actual_length);
 417
 418 exit:
 419         error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC);
 420         if (error)
 421                 err("bcm5974: trackpad urb failed: %d", error);
 422 }
 423
 424 /*
 425  * The Wellspring trackpad, like many recent Apple trackpads, share
 426  * the usb device with the keyboard. Since keyboards are usually
 427  * handled by the HID system, the device ends up being handled by two
 428  * modules. Setting up the device therefore becomes slightly
 429  * complicated. To enable multitouch features, a mode switch is
 430  * required, which is usually applied via the control interface of the
 431  * device.  It can be argued where this switch should take place. In
 432  * some drivers, like appletouch, the switch is made during
 433  * probe. However, the hid module may also alter the state of the
 434  * device, resulting in trackpad malfunction under certain
 435  * circumstances. To get around this problem, there is at least one
 436  * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to
 437  * recieve a reset_resume request rather than the normal resume.
 438  * Since the implementation of reset_resume is equal to mode switch
 439  * plus start_traffic, it seems easier to always do the switch when
 440  * starting traffic on the device.
 441  */
 442 static int bcm5974_start_traffic(struct bcm5974 *dev)
 443 {
 444         if (bcm5974_wellspring_mode(dev)) {
 445                 dprintk(1, "bcm5974: mode switch failed\n");
 446                 goto error;
 447         }
 448
 449         if (usb_submit_urb(dev->bt_urb, GFP_KERNEL))
 450                 goto error;
 451
 452         if (usb_submit_urb(dev->tp_urb, GFP_KERNEL))
 453                 goto err_kill_bt;
 454
 455         return 0;
 456
 457 err_kill_bt:
 458         usb_kill_urb(dev->bt_urb);
 459 error:
 460         return -EIO;
 461 }
 462
 463 static void bcm5974_pause_traffic(struct bcm5974 *dev)
 464 {
 465         usb_kill_urb(dev->tp_urb);
 466         usb_kill_urb(dev->bt_urb);
 467 }
 468
 469 /*
 470  * The code below implements open/close and manual suspend/resume.
 471  * All functions may be called in random order.
 472  *
 473  * Opening a suspended device fails with EACCES - permission denied.
 474  *
 475  * Failing a resume leaves the device resumed but closed.
 476  */
 477 static int bcm5974_open(struct input_dev *input)
 478 {
 479         struct bcm5974 *dev = input_get_drvdata(input);
 480         int error;
 481
 482         error = usb_autopm_get_interface(dev->intf);
 483         if (error)
 484                 return error;
 485
 486         mutex_lock(&dev->pm_mutex);
 487
 488         error = bcm5974_start_traffic(dev);
 489         if (!error)
 490                 dev->opened = 1;
 491
 492         mutex_unlock(&dev->pm_mutex);
 493
 494         if (error)
 495                 usb_autopm_put_interface(dev->intf);
 496
 497         return error;
 498 }
 499
 500 static void bcm5974_close(struct input_dev *input)
 501 {
 502         struct bcm5974 *dev = input_get_drvdata(input);
 503
 504         mutex_lock(&dev->pm_mutex);
 505
 506         bcm5974_pause_traffic(dev);
 507         dev->opened = 0;
 508
 509         mutex_unlock(&dev->pm_mutex);
 510
 511         usb_autopm_put_interface(dev->intf);
 512 }
 513
 514 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message)
 515 {
 516         struct bcm5974 *dev = usb_get_intfdata(iface);
 517
 518         mutex_lock(&dev->pm_mutex);
 519
 520         if (dev->opened)
 521                 bcm5974_pause_traffic(dev);
 522
 523         mutex_unlock(&dev->pm_mutex);
 524
 525         return 0;
 526 }
 527
 528 static int bcm5974_resume(struct usb_interface *iface)
 529 {
 530         struct bcm5974 *dev = usb_get_intfdata(iface);
 531         int error = 0;
 532
 533         mutex_lock(&dev->pm_mutex);
 534
 535         if (dev->opened)
 536                 error = bcm5974_start_traffic(dev);
 537
 538         mutex_unlock(&dev->pm_mutex);
 539
 540         return error;
 541 }
 542
 543 static int bcm5974_probe(struct usb_interface *iface,
 544                          const struct usb_device_id *id)
 545 {
 546         struct usb_device *udev = interface_to_usbdev(iface);
 547         const struct bcm5974_config *cfg;
 548         struct bcm5974 *dev;
 549         struct input_dev *input_dev;
 550         int error = -ENOMEM;
 551
 552         /* find the product index */
 553         cfg = bcm5974_get_config(udev);
 554
 555         /* allocate memory for our device state and initialize it */
 556         dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL);
 557         input_dev = input_allocate_device();
 558         if (!dev || !input_dev) {
 559                 err("bcm5974: out of memory");
 560                 goto err_free_devs;
 561         }
 562
 563         dev->udev = udev;
 564         dev->intf = iface;
 565         dev->input = input_dev;
 566         dev->cfg = *cfg;
 567         mutex_init(&dev->pm_mutex);
 568
 569         /* setup urbs */
 570         dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL);
 571         if (!dev->bt_urb)
 572                 goto err_free_devs;
 573
 574         dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL);
 575         if (!dev->tp_urb)
 576                 goto err_free_bt_urb;
 577
 578         dev->bt_data = usb_buffer_alloc(dev->udev,
 579                                         dev->cfg.bt_datalen, GFP_KERNEL,
 580                                         &dev->bt_urb->transfer_dma);
 581         if (!dev->bt_data)
 582                 goto err_free_urb;
 583
 584         dev->tp_data = usb_buffer_alloc(dev->udev,
 585                                         dev->cfg.tp_datalen, GFP_KERNEL,
 586                                         &dev->tp_urb->transfer_dma);
 587         if (!dev->tp_data)
 588                 goto err_free_bt_buffer;
 589
 590         usb_fill_int_urb(dev->bt_urb, udev,
 591                          usb_rcvintpipe(udev, cfg->bt_ep),
 592                          dev->bt_data, dev->cfg.bt_datalen,
 593                          bcm5974_irq_button, dev, 1);
 594
 595         usb_fill_int_urb(dev->tp_urb, udev,
 596                          usb_rcvintpipe(udev, cfg->tp_ep),
 597                          dev->tp_data, dev->cfg.tp_datalen,
 598                          bcm5974_irq_trackpad, dev, 1);
 599
 600         /* create bcm5974 device */
 601         usb_make_path(udev, dev->phys, sizeof(dev->phys));
 602         strlcat(dev->phys, "/input0", sizeof(dev->phys));
 603
 604         input_dev->name = "bcm5974";
 605         input_dev->phys = dev->phys;
 606         usb_to_input_id(dev->udev, &input_dev->id);
 607         input_dev->dev.parent = &iface->dev;
 608
 609         input_set_drvdata(input_dev, dev);
 610
 611         input_dev->open = bcm5974_open;
 612         input_dev->close = bcm5974_close;
 613
 614         setup_events_to_report(input_dev, cfg);
 615
 616         error = input_register_device(dev->input);
 617         if (error)
 618                 goto err_free_buffer;
 619
 620         /* save our data pointer in this interface device */
 621         usb_set_intfdata(iface, dev);
 622
 623         return 0;
 624
 625 err_free_buffer:
 626         usb_buffer_free(dev->udev, dev->cfg.tp_datalen,
 627                 dev->tp_data, dev->tp_urb->transfer_dma);
 628 err_free_bt_buffer:
 629         usb_buffer_free(dev->udev, dev->cfg.bt_datalen,
 630                 dev->bt_data, dev->bt_urb->transfer_dma);
 631 err_free_urb:
 632         usb_free_urb(dev->tp_urb);
 633 err_free_bt_urb:
 634         usb_free_urb(dev->bt_urb);
 635 err_free_devs:
 636         usb_set_intfdata(iface, NULL);
 637         input_free_device(input_dev);
 638         kfree(dev);
 639         return error;
 640 }
 641
 642 static void bcm5974_disconnect(struct usb_interface *iface)
 643 {
 644         struct bcm5974 *dev = usb_get_intfdata(iface);
 645
 646         usb_set_intfdata(iface, NULL);
 647
 648         input_unregister_device(dev->input);
 649         usb_buffer_free(dev->udev, dev->cfg.tp_datalen,
 650                         dev->tp_data, dev->tp_urb->transfer_dma);
 651         usb_buffer_free(dev->udev, dev->cfg.bt_datalen,
 652                         dev->bt_data, dev->bt_urb->transfer_dma);
 653         usb_free_urb(dev->tp_urb);
 654         usb_free_urb(dev->bt_urb);
 655         kfree(dev);
 656 }
 657
 658 static struct usb_driver bcm5974_driver = {
 659         .name                   = "bcm5974",
 660         .probe                  = bcm5974_probe,
 661         .disconnect             = bcm5974_disconnect,
 662         .suspend                = bcm5974_suspend,
 663         .resume                 = bcm5974_resume,
 664         .reset_resume           = bcm5974_resume,
 665         .id_table               = bcm5974_table,
 666         .supports_autosuspend   = 1,
 667 };
 668
 669 static int __init bcm5974_init(void)
 670 {
 671         return usb_register(&bcm5974_driver);
 672 }
 673
 674 static void __exit bcm5974_exit(void)
 675 {
 676         usb_deregister(&bcm5974_driver);
 677 }
 678
 679 module_init(bcm5974_init);
 680 module_exit(bcm5974_exit);
 681