drivers/input/mouse/bcm5974.c

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This source file includes following definitions.
get_tp_finger
bcm5974_get_config
raw2int
set_abs
setup_events_to_report
report_bt_state
report_finger_data
report_synaptics_data
report_tp_state
bcm5974_wellspring_mode
bcm5974_irq_button
bcm5974_irq_trackpad
bcm5974_start_traffic
bcm5974_pause_traffic
bcm5974_open
bcm5974_close
bcm5974_suspend
bcm5974_resume
bcm5974_probe
bcm5974_disconnect
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Apple USB BCM5974 (Macbook Air and Penryn Macbook Pro) multitouch driver
   4  *
   5  * Copyright (C) 2008      Henrik Rydberg (rydberg@euromail.se)
   6  * Copyright (C) 2015      John Horan (knasher@gmail.com)
   7  *
   8  * The USB initialization and package decoding was made by
   9  * Scott Shawcroft as part of the touchd user-space driver project:
  10  * Copyright (C) 2008      Scott Shawcroft (scott.shawcroft@gmail.com)
  11  *
  12  * The BCM5974 driver is based on the appletouch driver:
  13  * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
  14  * Copyright (C) 2005      Johannes Berg (johannes@sipsolutions.net)
  15  * Copyright (C) 2005      Stelian Pop (stelian@popies.net)
  16  * Copyright (C) 2005      Frank Arnold (frank@scirocco-5v-turbo.de)
  17  * Copyright (C) 2005      Peter Osterlund (petero2@telia.com)
  18  * Copyright (C) 2005      Michael Hanselmann (linux-kernel@hansmi.ch)
  19  * Copyright (C) 2006      Nicolas Boichat (nicolas@boichat.ch)
  20  */
  21 
  22 #include <linux/kernel.h>
  23 #include <linux/errno.h>
  24 #include <linux/slab.h>
  25 #include <linux/module.h>
  26 #include <linux/usb/input.h>
  27 #include <linux/hid.h>
  28 #include <linux/mutex.h>
  29 #include <linux/input/mt.h>
  30 
  31 #define USB_VENDOR_ID_APPLE             0x05ac
  32 
  33 /* MacbookAir, aka wellspring */
  34 #define USB_DEVICE_ID_APPLE_WELLSPRING_ANSI     0x0223
  35 #define USB_DEVICE_ID_APPLE_WELLSPRING_ISO      0x0224
  36 #define USB_DEVICE_ID_APPLE_WELLSPRING_JIS      0x0225
  37 /* MacbookProPenryn, aka wellspring2 */
  38 #define USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI    0x0230
  39 #define USB_DEVICE_ID_APPLE_WELLSPRING2_ISO     0x0231
  40 #define USB_DEVICE_ID_APPLE_WELLSPRING2_JIS     0x0232
  41 /* Macbook5,1 (unibody), aka wellspring3 */
  42 #define USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI    0x0236
  43 #define USB_DEVICE_ID_APPLE_WELLSPRING3_ISO     0x0237
  44 #define USB_DEVICE_ID_APPLE_WELLSPRING3_JIS     0x0238
  45 /* MacbookAir3,2 (unibody), aka wellspring5 */
  46 #define USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI    0x023f
  47 #define USB_DEVICE_ID_APPLE_WELLSPRING4_ISO     0x0240
  48 #define USB_DEVICE_ID_APPLE_WELLSPRING4_JIS     0x0241
  49 /* MacbookAir3,1 (unibody), aka wellspring4 */
  50 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI   0x0242
  51 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO    0x0243
  52 #define USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS    0x0244
  53 /* Macbook8 (unibody, March 2011) */
  54 #define USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI    0x0245
  55 #define USB_DEVICE_ID_APPLE_WELLSPRING5_ISO     0x0246
  56 #define USB_DEVICE_ID_APPLE_WELLSPRING5_JIS     0x0247
  57 /* MacbookAir4,1 (unibody, July 2011) */
  58 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI   0x0249
  59 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO    0x024a
  60 #define USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS    0x024b
  61 /* MacbookAir4,2 (unibody, July 2011) */
  62 #define USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI    0x024c
  63 #define USB_DEVICE_ID_APPLE_WELLSPRING6_ISO     0x024d
  64 #define USB_DEVICE_ID_APPLE_WELLSPRING6_JIS     0x024e
  65 /* Macbook8,2 (unibody) */
  66 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI   0x0252
  67 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO    0x0253
  68 #define USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS    0x0254
  69 /* MacbookPro10,1 (unibody, June 2012) */
  70 #define USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI    0x0262
  71 #define USB_DEVICE_ID_APPLE_WELLSPRING7_ISO     0x0263
  72 #define USB_DEVICE_ID_APPLE_WELLSPRING7_JIS     0x0264
  73 /* MacbookPro10,2 (unibody, October 2012) */
  74 #define USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI   0x0259
  75 #define USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO    0x025a
  76 #define USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS    0x025b
  77 /* MacbookAir6,2 (unibody, June 2013) */
  78 #define USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI    0x0290
  79 #define USB_DEVICE_ID_APPLE_WELLSPRING8_ISO     0x0291
  80 #define USB_DEVICE_ID_APPLE_WELLSPRING8_JIS     0x0292
  81 /* MacbookPro12,1 (2015) */
  82 #define USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI    0x0272
  83 #define USB_DEVICE_ID_APPLE_WELLSPRING9_ISO     0x0273
  84 #define USB_DEVICE_ID_APPLE_WELLSPRING9_JIS     0x0274
  85 
  86 #define BCM5974_DEVICE(prod) {                                  \
  87         .match_flags = (USB_DEVICE_ID_MATCH_DEVICE |            \
  88                         USB_DEVICE_ID_MATCH_INT_CLASS |         \
  89                         USB_DEVICE_ID_MATCH_INT_PROTOCOL),      \
  90         .idVendor = USB_VENDOR_ID_APPLE,                        \
  91         .idProduct = (prod),                                    \
  92         .bInterfaceClass = USB_INTERFACE_CLASS_HID,             \
  93         .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE      \
  94 }
  95 
  96 /* table of devices that work with this driver */
  97 static const struct usb_device_id bcm5974_table[] = {
  98         /* MacbookAir1.1 */
  99         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI),
 100         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO),
 101         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS),
 102         /* MacbookProPenryn */
 103         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI),
 104         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO),
 105         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS),
 106         /* Macbook5,1 */
 107         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI),
 108         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ISO),
 109         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_JIS),
 110         /* MacbookAir3,2 */
 111         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI),
 112         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ISO),
 113         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_JIS),
 114         /* MacbookAir3,1 */
 115         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI),
 116         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO),
 117         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS),
 118         /* MacbookPro8 */
 119         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI),
 120         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ISO),
 121         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_JIS),
 122         /* MacbookAir4,1 */
 123         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI),
 124         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO),
 125         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS),
 126         /* MacbookAir4,2 */
 127         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI),
 128         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_ISO),
 129         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING6_JIS),
 130         /* MacbookPro8,2 */
 131         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI),
 132         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO),
 133         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS),
 134         /* MacbookPro10,1 */
 135         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI),
 136         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_ISO),
 137         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7_JIS),
 138         /* MacbookPro10,2 */
 139         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI),
 140         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO),
 141         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS),
 142         /* MacbookAir6,2 */
 143         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI),
 144         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ISO),
 145         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_JIS),
 146         /* MacbookPro12,1 */
 147         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI),
 148         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_ISO),
 149         BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING9_JIS),
 150         /* Terminating entry */
 151         {}
 152 };
 153 MODULE_DEVICE_TABLE(usb, bcm5974_table);
 154 
 155 MODULE_AUTHOR("Henrik Rydberg");
 156 MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver");
 157 MODULE_LICENSE("GPL");
 158 
 159 #define dprintk(level, format, a...)\
 160         { if (debug >= level) printk(KERN_DEBUG format, ##a); }
 161 
 162 static int debug = 1;
 163 module_param(debug, int, 0644);
 164 MODULE_PARM_DESC(debug, "Activate debugging output");
 165 
 166 /* button data structure */
 167 struct bt_data {
 168         u8 unknown1;            /* constant */
 169         u8 button;              /* left button */
 170         u8 rel_x;               /* relative x coordinate */
 171         u8 rel_y;               /* relative y coordinate */
 172 };
 173 
 174 /* trackpad header types */
 175 enum tp_type {
 176         TYPE1,                  /* plain trackpad */
 177         TYPE2,                  /* button integrated in trackpad */
 178         TYPE3,                  /* additional header fields since June 2013 */
 179         TYPE4                   /* additional header field for pressure data */
 180 };
 181 
 182 /* trackpad finger data offsets, le16-aligned */
 183 #define HEADER_TYPE1            (13 * sizeof(__le16))
 184 #define HEADER_TYPE2            (15 * sizeof(__le16))
 185 #define HEADER_TYPE3            (19 * sizeof(__le16))
 186 #define HEADER_TYPE4            (23 * sizeof(__le16))
 187 
 188 /* trackpad button data offsets */
 189 #define BUTTON_TYPE1            0
 190 #define BUTTON_TYPE2            15
 191 #define BUTTON_TYPE3            23
 192 #define BUTTON_TYPE4            31
 193 
 194 /* list of device capability bits */
 195 #define HAS_INTEGRATED_BUTTON   1
 196 
 197 /* trackpad finger data block size */
 198 #define FSIZE_TYPE1             (14 * sizeof(__le16))
 199 #define FSIZE_TYPE2             (14 * sizeof(__le16))
 200 #define FSIZE_TYPE3             (14 * sizeof(__le16))
 201 #define FSIZE_TYPE4             (15 * sizeof(__le16))
 202 
 203 /* offset from header to finger struct */
 204 #define DELTA_TYPE1             (0 * sizeof(__le16))
 205 #define DELTA_TYPE2             (0 * sizeof(__le16))
 206 #define DELTA_TYPE3             (0 * sizeof(__le16))
 207 #define DELTA_TYPE4             (1 * sizeof(__le16))
 208 
 209 /* usb control message mode switch data */
 210 #define USBMSG_TYPE1            8, 0x300, 0, 0, 0x1, 0x8
 211 #define USBMSG_TYPE2            8, 0x300, 0, 0, 0x1, 0x8
 212 #define USBMSG_TYPE3            8, 0x300, 0, 0, 0x1, 0x8
 213 #define USBMSG_TYPE4            2, 0x302, 2, 1, 0x1, 0x0
 214 
 215 /* Wellspring initialization constants */
 216 #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID         1
 217 #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID        9
 218 
 219 /* trackpad finger structure, le16-aligned */
 220 struct tp_finger {
 221         __le16 origin;          /* zero when switching track finger */
 222         __le16 abs_x;           /* absolute x coodinate */
 223         __le16 abs_y;           /* absolute y coodinate */
 224         __le16 rel_x;           /* relative x coodinate */
 225         __le16 rel_y;           /* relative y coodinate */
 226         __le16 tool_major;      /* tool area, major axis */
 227         __le16 tool_minor;      /* tool area, minor axis */
 228         __le16 orientation;     /* 16384 when point, else 15 bit angle */
 229         __le16 touch_major;     /* touch area, major axis */
 230         __le16 touch_minor;     /* touch area, minor axis */
 231         __le16 unused[2];       /* zeros */
 232         __le16 pressure;        /* pressure on forcetouch touchpad */
 233         __le16 multi;           /* one finger: varies, more fingers: constant */
 234 } __attribute__((packed,aligned(2)));
 235 
 236 /* trackpad finger data size, empirically at least ten fingers */
 237 #define MAX_FINGERS             16
 238 #define MAX_FINGER_ORIENTATION  16384
 239 
 240 /* device-specific parameters */
 241 struct bcm5974_param {
 242         int snratio;            /* signal-to-noise ratio */
 243         int min;                /* device minimum reading */
 244         int max;                /* device maximum reading */
 245 };
 246 
 247 /* device-specific configuration */
 248 struct bcm5974_config {
 249         int ansi, iso, jis;     /* the product id of this device */
 250         int caps;               /* device capability bitmask */
 251         int bt_ep;              /* the endpoint of the button interface */
 252         int bt_datalen;         /* data length of the button interface */
 253         int tp_ep;              /* the endpoint of the trackpad interface */
 254         enum tp_type tp_type;   /* type of trackpad interface */
 255         int tp_header;          /* bytes in header block */
 256         int tp_datalen;         /* data length of the trackpad interface */
 257         int tp_button;          /* offset to button data */
 258         int tp_fsize;           /* bytes in single finger block */
 259         int tp_delta;           /* offset from header to finger struct */
 260         int um_size;            /* usb control message length */
 261         int um_req_val;         /* usb control message value */
 262         int um_req_idx;         /* usb control message index */
 263         int um_switch_idx;      /* usb control message mode switch index */
 264         int um_switch_on;       /* usb control message mode switch on */
 265         int um_switch_off;      /* usb control message mode switch off */
 266         struct bcm5974_param p; /* finger pressure limits */
 267         struct bcm5974_param w; /* finger width limits */
 268         struct bcm5974_param x; /* horizontal limits */
 269         struct bcm5974_param y; /* vertical limits */
 270         struct bcm5974_param o; /* orientation limits */
 271 };
 272 
 273 /* logical device structure */
 274 struct bcm5974 {
 275         char phys[64];
 276         struct usb_device *udev;        /* usb device */
 277         struct usb_interface *intf;     /* our interface */
 278         struct input_dev *input;        /* input dev */
 279         struct bcm5974_config cfg;      /* device configuration */
 280         struct mutex pm_mutex;          /* serialize access to open/suspend */
 281         int opened;                     /* 1: opened, 0: closed */
 282         struct urb *bt_urb;             /* button usb request block */
 283         struct bt_data *bt_data;        /* button transferred data */
 284         struct urb *tp_urb;             /* trackpad usb request block */
 285         u8 *tp_data;                    /* trackpad transferred data */
 286         const struct tp_finger *index[MAX_FINGERS];     /* finger index data */
 287         struct input_mt_pos pos[MAX_FINGERS];           /* position array */
 288         int slots[MAX_FINGERS];                         /* slot assignments */
 289 };
 290 
 291 /* trackpad finger block data, le16-aligned */
 292 static const struct tp_finger *get_tp_finger(const struct bcm5974 *dev, int i)
 293 {
 294         const struct bcm5974_config *c = &dev->cfg;
 295         u8 *f_base = dev->tp_data + c->tp_header + c->tp_delta;
 296 
 297         return (const struct tp_finger *)(f_base + i * c->tp_fsize);
 298 }
 299 
 300 #define DATAFORMAT(type)                                \
 301         type,                                           \
 302         HEADER_##type,                                  \
 303         HEADER_##type + (MAX_FINGERS) * (FSIZE_##type), \
 304         BUTTON_##type,                                  \
 305         FSIZE_##type,                                   \
 306         DELTA_##type,                                   \
 307         USBMSG_##type
 308 
 309 /* logical signal quality */
 310 #define SN_PRESSURE     45              /* pressure signal-to-noise ratio */
 311 #define SN_WIDTH        25              /* width signal-to-noise ratio */
 312 #define SN_COORD        250             /* coordinate signal-to-noise ratio */
 313 #define SN_ORIENT       10              /* orientation signal-to-noise ratio */
 314 
 315 /* device constants */
 316 static const struct bcm5974_config bcm5974_config_table[] = {
 317         {
 318                 USB_DEVICE_ID_APPLE_WELLSPRING_ANSI,
 319                 USB_DEVICE_ID_APPLE_WELLSPRING_ISO,
 320                 USB_DEVICE_ID_APPLE_WELLSPRING_JIS,
 321                 0,
 322                 0x84, sizeof(struct bt_data),
 323                 0x81, DATAFORMAT(TYPE1),
 324                 { SN_PRESSURE, 0, 256 },
 325                 { SN_WIDTH, 0, 2048 },
 326                 { SN_COORD, -4824, 5342 },
 327                 { SN_COORD, -172, 5820 },
 328                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 329         },
 330         {
 331                 USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI,
 332                 USB_DEVICE_ID_APPLE_WELLSPRING2_ISO,
 333                 USB_DEVICE_ID_APPLE_WELLSPRING2_JIS,
 334                 0,
 335                 0x84, sizeof(struct bt_data),
 336                 0x81, DATAFORMAT(TYPE1),
 337                 { SN_PRESSURE, 0, 256 },
 338                 { SN_WIDTH, 0, 2048 },
 339                 { SN_COORD, -4824, 4824 },
 340                 { SN_COORD, -172, 4290 },
 341                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 342         },
 343         {
 344                 USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI,
 345                 USB_DEVICE_ID_APPLE_WELLSPRING3_ISO,
 346                 USB_DEVICE_ID_APPLE_WELLSPRING3_JIS,
 347                 HAS_INTEGRATED_BUTTON,
 348                 0x84, sizeof(struct bt_data),
 349                 0x81, DATAFORMAT(TYPE2),
 350                 { SN_PRESSURE, 0, 300 },
 351                 { SN_WIDTH, 0, 2048 },
 352                 { SN_COORD, -4460, 5166 },
 353                 { SN_COORD, -75, 6700 },
 354                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 355         },
 356         {
 357                 USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI,
 358                 USB_DEVICE_ID_APPLE_WELLSPRING4_ISO,
 359                 USB_DEVICE_ID_APPLE_WELLSPRING4_JIS,
 360                 HAS_INTEGRATED_BUTTON,
 361                 0x84, sizeof(struct bt_data),
 362                 0x81, DATAFORMAT(TYPE2),
 363                 { SN_PRESSURE, 0, 300 },
 364                 { SN_WIDTH, 0, 2048 },
 365                 { SN_COORD, -4620, 5140 },
 366                 { SN_COORD, -150, 6600 },
 367                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 368         },
 369         {
 370                 USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI,
 371                 USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO,
 372                 USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS,
 373                 HAS_INTEGRATED_BUTTON,
 374                 0x84, sizeof(struct bt_data),
 375                 0x81, DATAFORMAT(TYPE2),
 376                 { SN_PRESSURE, 0, 300 },
 377                 { SN_WIDTH, 0, 2048 },
 378                 { SN_COORD, -4616, 5112 },
 379                 { SN_COORD, -142, 5234 },
 380                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 381         },
 382         {
 383                 USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI,
 384                 USB_DEVICE_ID_APPLE_WELLSPRING5_ISO,
 385                 USB_DEVICE_ID_APPLE_WELLSPRING5_JIS,
 386                 HAS_INTEGRATED_BUTTON,
 387                 0x84, sizeof(struct bt_data),
 388                 0x81, DATAFORMAT(TYPE2),
 389                 { SN_PRESSURE, 0, 300 },
 390                 { SN_WIDTH, 0, 2048 },
 391                 { SN_COORD, -4415, 5050 },
 392                 { SN_COORD, -55, 6680 },
 393                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 394         },
 395         {
 396                 USB_DEVICE_ID_APPLE_WELLSPRING6_ANSI,
 397                 USB_DEVICE_ID_APPLE_WELLSPRING6_ISO,
 398                 USB_DEVICE_ID_APPLE_WELLSPRING6_JIS,
 399                 HAS_INTEGRATED_BUTTON,
 400                 0x84, sizeof(struct bt_data),
 401                 0x81, DATAFORMAT(TYPE2),
 402                 { SN_PRESSURE, 0, 300 },
 403                 { SN_WIDTH, 0, 2048 },
 404                 { SN_COORD, -4620, 5140 },
 405                 { SN_COORD, -150, 6600 },
 406                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 407         },
 408         {
 409                 USB_DEVICE_ID_APPLE_WELLSPRING5A_ANSI,
 410                 USB_DEVICE_ID_APPLE_WELLSPRING5A_ISO,
 411                 USB_DEVICE_ID_APPLE_WELLSPRING5A_JIS,
 412                 HAS_INTEGRATED_BUTTON,
 413                 0x84, sizeof(struct bt_data),
 414                 0x81, DATAFORMAT(TYPE2),
 415                 { SN_PRESSURE, 0, 300 },
 416                 { SN_WIDTH, 0, 2048 },
 417                 { SN_COORD, -4750, 5280 },
 418                 { SN_COORD, -150, 6730 },
 419                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 420         },
 421         {
 422                 USB_DEVICE_ID_APPLE_WELLSPRING6A_ANSI,
 423                 USB_DEVICE_ID_APPLE_WELLSPRING6A_ISO,
 424                 USB_DEVICE_ID_APPLE_WELLSPRING6A_JIS,
 425                 HAS_INTEGRATED_BUTTON,
 426                 0x84, sizeof(struct bt_data),
 427                 0x81, DATAFORMAT(TYPE2),
 428                 { SN_PRESSURE, 0, 300 },
 429                 { SN_WIDTH, 0, 2048 },
 430                 { SN_COORD, -4620, 5140 },
 431                 { SN_COORD, -150, 6600 },
 432                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 433         },
 434         {
 435                 USB_DEVICE_ID_APPLE_WELLSPRING7_ANSI,
 436                 USB_DEVICE_ID_APPLE_WELLSPRING7_ISO,
 437                 USB_DEVICE_ID_APPLE_WELLSPRING7_JIS,
 438                 HAS_INTEGRATED_BUTTON,
 439                 0x84, sizeof(struct bt_data),
 440                 0x81, DATAFORMAT(TYPE2),
 441                 { SN_PRESSURE, 0, 300 },
 442                 { SN_WIDTH, 0, 2048 },
 443                 { SN_COORD, -4750, 5280 },
 444                 { SN_COORD, -150, 6730 },
 445                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 446         },
 447         {
 448                 USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI,
 449                 USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO,
 450                 USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS,
 451                 HAS_INTEGRATED_BUTTON,
 452                 0x84, sizeof(struct bt_data),
 453                 0x81, DATAFORMAT(TYPE2),
 454                 { SN_PRESSURE, 0, 300 },
 455                 { SN_WIDTH, 0, 2048 },
 456                 { SN_COORD, -4750, 5280 },
 457                 { SN_COORD, -150, 6730 },
 458                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 459         },
 460         {
 461                 USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI,
 462                 USB_DEVICE_ID_APPLE_WELLSPRING8_ISO,
 463                 USB_DEVICE_ID_APPLE_WELLSPRING8_JIS,
 464                 HAS_INTEGRATED_BUTTON,
 465                 0, sizeof(struct bt_data),
 466                 0x83, DATAFORMAT(TYPE3),
 467                 { SN_PRESSURE, 0, 300 },
 468                 { SN_WIDTH, 0, 2048 },
 469                 { SN_COORD, -4620, 5140 },
 470                 { SN_COORD, -150, 6600 },
 471                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 472         },
 473         {
 474                 USB_DEVICE_ID_APPLE_WELLSPRING9_ANSI,
 475                 USB_DEVICE_ID_APPLE_WELLSPRING9_ISO,
 476                 USB_DEVICE_ID_APPLE_WELLSPRING9_JIS,
 477                 HAS_INTEGRATED_BUTTON,
 478                 0, sizeof(struct bt_data),
 479                 0x83, DATAFORMAT(TYPE4),
 480                 { SN_PRESSURE, 0, 300 },
 481                 { SN_WIDTH, 0, 2048 },
 482                 { SN_COORD, -4828, 5345 },
 483                 { SN_COORD, -203, 6803 },
 484                 { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
 485         },
 486         {}
 487 };
 488 
 489 /* return the device-specific configuration by device */
 490 static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev)
 491 {
 492         u16 id = le16_to_cpu(udev->descriptor.idProduct);
 493         const struct bcm5974_config *cfg;
 494 
 495         for (cfg = bcm5974_config_table; cfg->ansi; ++cfg)
 496                 if (cfg->ansi == id || cfg->iso == id || cfg->jis == id)
 497                         return cfg;
 498 
 499         return bcm5974_config_table;
 500 }
 501 
 502 /* convert 16-bit little endian to signed integer */
 503 static inline int raw2int(__le16 x)
 504 {
 505         return (signed short)le16_to_cpu(x);
 506 }
 507 
 508 static void set_abs(struct input_dev *input, unsigned int code,
 509                     const struct bcm5974_param *p)
 510 {
 511         int fuzz = p->snratio ? (p->max - p->min) / p->snratio : 0;
 512         input_set_abs_params(input, code, p->min, p->max, fuzz, 0);
 513 }
 514 
 515 /* setup which logical events to report */
 516 static void setup_events_to_report(struct input_dev *input_dev,
 517                                    const struct bcm5974_config *cfg)
 518 {
 519         __set_bit(EV_ABS, input_dev->evbit);
 520 
 521         /* for synaptics only */
 522         input_set_abs_params(input_dev, ABS_PRESSURE, 0, 256, 5, 0);
 523         input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 16, 0, 0);
 524 
 525         /* finger touch area */
 526         set_abs(input_dev, ABS_MT_TOUCH_MAJOR, &cfg->w);
 527         set_abs(input_dev, ABS_MT_TOUCH_MINOR, &cfg->w);
 528         /* finger approach area */
 529         set_abs(input_dev, ABS_MT_WIDTH_MAJOR, &cfg->w);
 530         set_abs(input_dev, ABS_MT_WIDTH_MINOR, &cfg->w);
 531         /* finger orientation */
 532         set_abs(input_dev, ABS_MT_ORIENTATION, &cfg->o);
 533         /* finger position */
 534         set_abs(input_dev, ABS_MT_POSITION_X, &cfg->x);
 535         set_abs(input_dev, ABS_MT_POSITION_Y, &cfg->y);
 536 
 537         __set_bit(EV_KEY, input_dev->evbit);
 538         __set_bit(BTN_LEFT, input_dev->keybit);
 539 
 540         if (cfg->caps & HAS_INTEGRATED_BUTTON)
 541                 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
 542 
 543         input_mt_init_slots(input_dev, MAX_FINGERS,
 544                 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK);
 545 }
 546 
 547 /* report button data as logical button state */
 548 static int report_bt_state(struct bcm5974 *dev, int size)
 549 {
 550         if (size != sizeof(struct bt_data))
 551                 return -EIO;
 552 
 553         dprintk(7,
 554                 "bcm5974: button data: %x %x %x %x\n",
 555                 dev->bt_data->unknown1, dev->bt_data->button,
 556                 dev->bt_data->rel_x, dev->bt_data->rel_y);
 557 
 558         input_report_key(dev->input, BTN_LEFT, dev->bt_data->button);
 559         input_sync(dev->input);
 560 
 561         return 0;
 562 }
 563 
 564 static void report_finger_data(struct input_dev *input, int slot,
 565                                const struct input_mt_pos *pos,
 566                                const struct tp_finger *f)
 567 {
 568         input_mt_slot(input, slot);
 569         input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
 570 
 571         input_report_abs(input, ABS_MT_TOUCH_MAJOR,
 572                          raw2int(f->touch_major) << 1);
 573         input_report_abs(input, ABS_MT_TOUCH_MINOR,
 574                          raw2int(f->touch_minor) << 1);
 575         input_report_abs(input, ABS_MT_WIDTH_MAJOR,
 576                          raw2int(f->tool_major) << 1);
 577         input_report_abs(input, ABS_MT_WIDTH_MINOR,
 578                          raw2int(f->tool_minor) << 1);
 579         input_report_abs(input, ABS_MT_ORIENTATION,
 580                          MAX_FINGER_ORIENTATION - raw2int(f->orientation));
 581         input_report_abs(input, ABS_MT_POSITION_X, pos->x);
 582         input_report_abs(input, ABS_MT_POSITION_Y, pos->y);
 583 }
 584 
 585 static void report_synaptics_data(struct input_dev *input,
 586                                   const struct bcm5974_config *cfg,
 587                                   const struct tp_finger *f, int raw_n)
 588 {
 589         int abs_p = 0, abs_w = 0;
 590 
 591         if (raw_n) {
 592                 int p = raw2int(f->touch_major);
 593                 int w = raw2int(f->tool_major);
 594                 if (p > 0 && raw2int(f->origin)) {
 595                         abs_p = clamp_val(256 * p / cfg->p.max, 0, 255);
 596                         abs_w = clamp_val(16 * w / cfg->w.max, 0, 15);
 597                 }
 598         }
 599 
 600         input_report_abs(input, ABS_PRESSURE, abs_p);
 601         input_report_abs(input, ABS_TOOL_WIDTH, abs_w);
 602 }
 603 
 604 /* report trackpad data as logical trackpad state */
 605 static int report_tp_state(struct bcm5974 *dev, int size)
 606 {
 607         const struct bcm5974_config *c = &dev->cfg;
 608         const struct tp_finger *f;
 609         struct input_dev *input = dev->input;
 610         int raw_n, i, n = 0;
 611 
 612         if (size < c->tp_header || (size - c->tp_header) % c->tp_fsize != 0)
 613                 return -EIO;
 614 
 615         raw_n = (size - c->tp_header) / c->tp_fsize;
 616 
 617         for (i = 0; i < raw_n; i++) {
 618                 f = get_tp_finger(dev, i);
 619                 if (raw2int(f->touch_major) == 0)
 620                         continue;
 621                 dev->pos[n].x = raw2int(f->abs_x);
 622                 dev->pos[n].y = c->y.min + c->y.max - raw2int(f->abs_y);
 623                 dev->index[n++] = f;
 624         }
 625 
 626         input_mt_assign_slots(input, dev->slots, dev->pos, n, 0);
 627 
 628         for (i = 0; i < n; i++)
 629                 report_finger_data(input, dev->slots[i],
 630                                    &dev->pos[i], dev->index[i]);
 631 
 632         input_mt_sync_frame(input);
 633 
 634         report_synaptics_data(input, c, get_tp_finger(dev, 0), raw_n);
 635 
 636         /* later types report button events via integrated button only */
 637         if (c->caps & HAS_INTEGRATED_BUTTON) {
 638                 int ibt = raw2int(dev->tp_data[c->tp_button]);
 639                 input_report_key(input, BTN_LEFT, ibt);
 640         }
 641 
 642         input_sync(input);
 643 
 644         return 0;
 645 }
 646 
 647 static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on)
 648 {
 649         const struct bcm5974_config *c = &dev->cfg;
 650         int retval = 0, size;
 651         char *data;
 652 
 653         /* Type 3 does not require a mode switch */
 654         if (c->tp_type == TYPE3)
 655                 return 0;
 656 
 657         data = kmalloc(c->um_size, GFP_KERNEL);
 658         if (!data) {
 659                 dev_err(&dev->intf->dev, "out of memory\n");
 660                 retval = -ENOMEM;
 661                 goto out;
 662         }
 663 
 664         /* read configuration */
 665         size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 666                         BCM5974_WELLSPRING_MODE_READ_REQUEST_ID,
 667                         USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 668                         c->um_req_val, c->um_req_idx, data, c->um_size, 5000);
 669 
 670         if (size != c->um_size) {
 671                 dev_err(&dev->intf->dev, "could not read from device\n");
 672                 retval = -EIO;
 673                 goto out;
 674         }
 675 
 676         /* apply the mode switch */
 677         data[c->um_switch_idx] = on ? c->um_switch_on : c->um_switch_off;
 678 
 679         /* write configuration */
 680         size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 681                         BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID,
 682                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 683                         c->um_req_val, c->um_req_idx, data, c->um_size, 5000);
 684 
 685         if (size != c->um_size) {
 686                 dev_err(&dev->intf->dev, "could not write to device\n");
 687                 retval = -EIO;
 688                 goto out;
 689         }
 690 
 691         dprintk(2, "bcm5974: switched to %s mode.\n",
 692                 on ? "wellspring" : "normal");
 693 
 694  out:
 695         kfree(data);
 696         return retval;
 697 }
 698 
 699 static void bcm5974_irq_button(struct urb *urb)
 700 {
 701         struct bcm5974 *dev = urb->context;
 702         struct usb_interface *intf = dev->intf;
 703         int error;
 704 
 705         switch (urb->status) {
 706         case 0:
 707                 break;
 708         case -EOVERFLOW:
 709         case -ECONNRESET:
 710         case -ENOENT:
 711         case -ESHUTDOWN:
 712                 dev_dbg(&intf->dev, "button urb shutting down: %d\n",
 713                         urb->status);
 714                 return;
 715         default:
 716                 dev_dbg(&intf->dev, "button urb status: %d\n", urb->status);
 717                 goto exit;
 718         }
 719 
 720         if (report_bt_state(dev, dev->bt_urb->actual_length))
 721                 dprintk(1, "bcm5974: bad button package, length: %d\n",
 722                         dev->bt_urb->actual_length);
 723 
 724 exit:
 725         error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC);
 726         if (error)
 727                 dev_err(&intf->dev, "button urb failed: %d\n", error);
 728 }
 729 
 730 static void bcm5974_irq_trackpad(struct urb *urb)
 731 {
 732         struct bcm5974 *dev = urb->context;
 733         struct usb_interface *intf = dev->intf;
 734         int error;
 735 
 736         switch (urb->status) {
 737         case 0:
 738                 break;
 739         case -EOVERFLOW:
 740         case -ECONNRESET:
 741         case -ENOENT:
 742         case -ESHUTDOWN:
 743                 dev_dbg(&intf->dev, "trackpad urb shutting down: %d\n",
 744                         urb->status);
 745                 return;
 746         default:
 747                 dev_dbg(&intf->dev, "trackpad urb status: %d\n", urb->status);
 748                 goto exit;
 749         }
 750 
 751         /* control response ignored */
 752         if (dev->tp_urb->actual_length == 2)
 753                 goto exit;
 754 
 755         if (report_tp_state(dev, dev->tp_urb->actual_length))
 756                 dprintk(1, "bcm5974: bad trackpad package, length: %d\n",
 757                         dev->tp_urb->actual_length);
 758 
 759 exit:
 760         error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC);
 761         if (error)
 762                 dev_err(&intf->dev, "trackpad urb failed: %d\n", error);
 763 }
 764 
 765 /*
 766  * The Wellspring trackpad, like many recent Apple trackpads, share
 767  * the usb device with the keyboard. Since keyboards are usually
 768  * handled by the HID system, the device ends up being handled by two
 769  * modules. Setting up the device therefore becomes slightly
 770  * complicated. To enable multitouch features, a mode switch is
 771  * required, which is usually applied via the control interface of the
 772  * device.  It can be argued where this switch should take place. In
 773  * some drivers, like appletouch, the switch is made during
 774  * probe. However, the hid module may also alter the state of the
 775  * device, resulting in trackpad malfunction under certain
 776  * circumstances. To get around this problem, there is at least one
 777  * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to
 778  * receive a reset_resume request rather than the normal resume.
 779  * Since the implementation of reset_resume is equal to mode switch
 780  * plus start_traffic, it seems easier to always do the switch when
 781  * starting traffic on the device.
 782  */
 783 static int bcm5974_start_traffic(struct bcm5974 *dev)
 784 {
 785         int error;
 786 
 787         error = bcm5974_wellspring_mode(dev, true);
 788         if (error) {
 789                 dprintk(1, "bcm5974: mode switch failed\n");
 790                 goto err_out;
 791         }
 792 
 793         if (dev->bt_urb) {
 794                 error = usb_submit_urb(dev->bt_urb, GFP_KERNEL);
 795                 if (error)
 796                         goto err_reset_mode;
 797         }
 798 
 799         error = usb_submit_urb(dev->tp_urb, GFP_KERNEL);
 800         if (error)
 801                 goto err_kill_bt;
 802 
 803         return 0;
 804 
 805 err_kill_bt:
 806         usb_kill_urb(dev->bt_urb);
 807 err_reset_mode:
 808         bcm5974_wellspring_mode(dev, false);
 809 err_out:
 810         return error;
 811 }
 812 
 813 static void bcm5974_pause_traffic(struct bcm5974 *dev)
 814 {
 815         usb_kill_urb(dev->tp_urb);
 816         usb_kill_urb(dev->bt_urb);
 817         bcm5974_wellspring_mode(dev, false);
 818 }
 819 
 820 /*
 821  * The code below implements open/close and manual suspend/resume.
 822  * All functions may be called in random order.
 823  *
 824  * Opening a suspended device fails with EACCES - permission denied.
 825  *
 826  * Failing a resume leaves the device resumed but closed.
 827  */
 828 static int bcm5974_open(struct input_dev *input)
 829 {
 830         struct bcm5974 *dev = input_get_drvdata(input);
 831         int error;
 832 
 833         error = usb_autopm_get_interface(dev->intf);
 834         if (error)
 835                 return error;
 836 
 837         mutex_lock(&dev->pm_mutex);
 838 
 839         error = bcm5974_start_traffic(dev);
 840         if (!error)
 841                 dev->opened = 1;
 842 
 843         mutex_unlock(&dev->pm_mutex);
 844 
 845         if (error)
 846                 usb_autopm_put_interface(dev->intf);
 847 
 848         return error;
 849 }
 850 
 851 static void bcm5974_close(struct input_dev *input)
 852 {
 853         struct bcm5974 *dev = input_get_drvdata(input);
 854 
 855         mutex_lock(&dev->pm_mutex);
 856 
 857         bcm5974_pause_traffic(dev);
 858         dev->opened = 0;
 859 
 860         mutex_unlock(&dev->pm_mutex);
 861 
 862         usb_autopm_put_interface(dev->intf);
 863 }
 864 
 865 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message)
 866 {
 867         struct bcm5974 *dev = usb_get_intfdata(iface);
 868 
 869         mutex_lock(&dev->pm_mutex);
 870 
 871         if (dev->opened)
 872                 bcm5974_pause_traffic(dev);
 873 
 874         mutex_unlock(&dev->pm_mutex);
 875 
 876         return 0;
 877 }
 878 
 879 static int bcm5974_resume(struct usb_interface *iface)
 880 {
 881         struct bcm5974 *dev = usb_get_intfdata(iface);
 882         int error = 0;
 883 
 884         mutex_lock(&dev->pm_mutex);
 885 
 886         if (dev->opened)
 887                 error = bcm5974_start_traffic(dev);
 888 
 889         mutex_unlock(&dev->pm_mutex);
 890 
 891         return error;
 892 }
 893 
 894 static int bcm5974_probe(struct usb_interface *iface,
 895                          const struct usb_device_id *id)
 896 {
 897         struct usb_device *udev = interface_to_usbdev(iface);
 898         const struct bcm5974_config *cfg;
 899         struct bcm5974 *dev;
 900         struct input_dev *input_dev;
 901         int error = -ENOMEM;
 902 
 903         /* find the product index */
 904         cfg = bcm5974_get_config(udev);
 905 
 906         /* allocate memory for our device state and initialize it */
 907         dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL);
 908         input_dev = input_allocate_device();
 909         if (!dev || !input_dev) {
 910                 dev_err(&iface->dev, "out of memory\n");
 911                 goto err_free_devs;
 912         }
 913 
 914         dev->udev = udev;
 915         dev->intf = iface;
 916         dev->input = input_dev;
 917         dev->cfg = *cfg;
 918         mutex_init(&dev->pm_mutex);
 919 
 920         /* setup urbs */
 921         if (cfg->tp_type == TYPE1) {
 922                 dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL);
 923                 if (!dev->bt_urb)
 924                         goto err_free_devs;
 925         }
 926 
 927         dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL);
 928         if (!dev->tp_urb)
 929                 goto err_free_bt_urb;
 930 
 931         if (dev->bt_urb) {
 932                 dev->bt_data = usb_alloc_coherent(dev->udev,
 933                                           dev->cfg.bt_datalen, GFP_KERNEL,
 934                                           &dev->bt_urb->transfer_dma);
 935                 if (!dev->bt_data)
 936                         goto err_free_urb;
 937         }
 938 
 939         dev->tp_data = usb_alloc_coherent(dev->udev,
 940                                           dev->cfg.tp_datalen, GFP_KERNEL,
 941                                           &dev->tp_urb->transfer_dma);
 942         if (!dev->tp_data)
 943                 goto err_free_bt_buffer;
 944 
 945         if (dev->bt_urb)
 946                 usb_fill_int_urb(dev->bt_urb, udev,
 947                                  usb_rcvintpipe(udev, cfg->bt_ep),
 948                                  dev->bt_data, dev->cfg.bt_datalen,
 949                                  bcm5974_irq_button, dev, 1);
 950 
 951         usb_fill_int_urb(dev->tp_urb, udev,
 952                          usb_rcvintpipe(udev, cfg->tp_ep),
 953                          dev->tp_data, dev->cfg.tp_datalen,
 954                          bcm5974_irq_trackpad, dev, 1);
 955 
 956         /* create bcm5974 device */
 957         usb_make_path(udev, dev->phys, sizeof(dev->phys));
 958         strlcat(dev->phys, "/input0", sizeof(dev->phys));
 959 
 960         input_dev->name = "bcm5974";
 961         input_dev->phys = dev->phys;
 962         usb_to_input_id(dev->udev, &input_dev->id);
 963         /* report driver capabilities via the version field */
 964         input_dev->id.version = cfg->caps;
 965         input_dev->dev.parent = &iface->dev;
 966 
 967         input_set_drvdata(input_dev, dev);
 968 
 969         input_dev->open = bcm5974_open;
 970         input_dev->close = bcm5974_close;
 971 
 972         setup_events_to_report(input_dev, cfg);
 973 
 974         error = input_register_device(dev->input);
 975         if (error)
 976                 goto err_free_buffer;
 977 
 978         /* save our data pointer in this interface device */
 979         usb_set_intfdata(iface, dev);
 980 
 981         return 0;
 982 
 983 err_free_buffer:
 984         usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
 985                 dev->tp_data, dev->tp_urb->transfer_dma);
 986 err_free_bt_buffer:
 987         if (dev->bt_urb)
 988                 usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
 989                                   dev->bt_data, dev->bt_urb->transfer_dma);
 990 err_free_urb:
 991         usb_free_urb(dev->tp_urb);
 992 err_free_bt_urb:
 993         usb_free_urb(dev->bt_urb);
 994 err_free_devs:
 995         usb_set_intfdata(iface, NULL);
 996         input_free_device(input_dev);
 997         kfree(dev);
 998         return error;
 999 }
1000 
1001 static void bcm5974_disconnect(struct usb_interface *iface)
1002 {
1003         struct bcm5974 *dev = usb_get_intfdata(iface);
1004 
1005         usb_set_intfdata(iface, NULL);
1006 
1007         input_unregister_device(dev->input);
1008         usb_free_coherent(dev->udev, dev->cfg.tp_datalen,
1009                           dev->tp_data, dev->tp_urb->transfer_dma);
1010         if (dev->bt_urb)
1011                 usb_free_coherent(dev->udev, dev->cfg.bt_datalen,
1012                                   dev->bt_data, dev->bt_urb->transfer_dma);
1013         usb_free_urb(dev->tp_urb);
1014         usb_free_urb(dev->bt_urb);
1015         kfree(dev);
1016 }
1017 
1018 static struct usb_driver bcm5974_driver = {
1019         .name                   = "bcm5974",
1020         .probe                  = bcm5974_probe,
1021         .disconnect             = bcm5974_disconnect,
1022         .suspend                = bcm5974_suspend,
1023         .resume                 = bcm5974_resume,
1024         .id_table               = bcm5974_table,
1025         .supports_autosuspend   = 1,
1026 };
1027 
1028 module_usb_driver(bcm5974_driver);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/input/mouse/bcm5974.c

DEFINITIONS
