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sys/dev/hid/bcm5974.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 Huang Wen Hui 5 * Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/endian.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/sysctl.h> 40 #include <sys/systm.h> 41 42 #include <dev/evdev/input.h> 43 #include <dev/evdev/evdev.h> 44 45 #define HID_DEBUG_VAR bcm5974_debug 46 #include <dev/hid/hid.h> 47 #include <dev/hid/hidbus.h> 48 #include <dev/hid/hidquirk.h> 49 50 #include <dev/usb/usb.h> 51 #include <dev/usb/usbdi.h> 52 #include <dev/usb/usbhid.h> 53 #include <dev/usb/usb_ioctl.h> 54 55 #include "usbdevs.h" 56 57 #define BCM5974_BUFFER_MAX (248 * 4) /* 4 Type4 SPI frames */ 58 #define BCM5974_TLC_PAGE HUP_GENERIC_DESKTOP 59 #define BCM5974_TLC_USAGE HUG_MOUSE 60 61 /* magic to switch device from HID (default) mode into raw */ 62 /* Type1 & Type2 trackpads */ 63 #define BCM5974_USB_IFACE_INDEX 0 64 #define BCM5974_USB_REPORT_LEN 8 65 #define BCM5974_USB_REPORT_ID 0 66 #define BCM5974_USB_MODE_RAW 0x01 67 #define BCM5974_USB_MODE_HID 0x08 68 /* Type4 trackpads */ 69 #define BCM5974_HID_REPORT_LEN 2 70 #define BCM5974_HID_REPORT_ID 2 71 #define BCM5974_HID_MODE_RAW 0x01 72 #define BCM5974_HID_MODE_HID 0x00 73 74 /* Tunables */ 75 static SYSCTL_NODE(_hw_hid, OID_AUTO, bcm5974, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 76 "HID wellspring touchpad"); 77 78 #ifdef HID_DEBUG 79 enum wsp_log_level { 80 BCM5974_LLEVEL_DISABLED = 0, 81 BCM5974_LLEVEL_ERROR, 82 BCM5974_LLEVEL_DEBUG, /* for troubleshooting */ 83 BCM5974_LLEVEL_INFO, /* for diagnostics */ 84 }; 85 /* the default is to only log errors */ 86 static int bcm5974_debug = BCM5974_LLEVEL_ERROR; 87 88 SYSCTL_INT(_hw_hid_bcm5974, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &bcm5974_debug, BCM5974_LLEVEL_ERROR, "BCM5974 debug level"); 90 #endif /* HID_DEBUG */ 91 92 /* 93 * Some tables, structures, definitions and constant values for the 94 * touchpad protocol has been copied from Linux's 95 * "drivers/input/mouse/bcm5974.c" which has the following copyright 96 * holders under GPLv2. All device specific code in this driver has 97 * been written from scratch. The decoding algorithm is based on 98 * output from FreeBSD's usbdump. 99 * 100 * Copyright (C) 2008 Henrik Rydberg (rydberg@euromail.se) 101 * Copyright (C) 2008 Scott Shawcroft (scott.shawcroft@gmail.com) 102 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) 103 * Copyright (C) 2005 Johannes Berg (johannes@sipsolutions.net) 104 * Copyright (C) 2005 Stelian Pop (stelian@popies.net) 105 * Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de) 106 * Copyright (C) 2005 Peter Osterlund (petero2@telia.com) 107 * Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch) 108 * Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch) 109 */ 110 111 /* trackpad header types */ 112 enum tp_type { 113 TYPE1, /* plain trackpad */ 114 TYPE2, /* button integrated in trackpad */ 115 TYPE3, /* additional header fields since June 2013 */ 116 TYPE4, /* additional header field for pressure data */ 117 TYPE_CNT 118 }; 119 120 /* list of device capability bits */ 121 #define HAS_INTEGRATED_BUTTON 1 122 123 struct tp_type_params { 124 uint8_t caps; /* device capability bitmask */ 125 uint8_t button; /* offset to button data */ 126 uint8_t offset; /* offset to trackpad finger data */ 127 uint8_t delta; /* offset from header to finger struct */ 128 } const static tp[TYPE_CNT] = { 129 [TYPE1] = { 130 .caps = 0, 131 .button = 0, 132 .offset = 13 * 2, 133 .delta = 0, 134 }, 135 [TYPE2] = { 136 .caps = HAS_INTEGRATED_BUTTON, 137 .button = 15, 138 .offset = 15 * 2, 139 .delta = 0, 140 }, 141 [TYPE3] = { 142 .caps = HAS_INTEGRATED_BUTTON, 143 .button = 23, 144 .offset = 19 * 2, 145 .delta = 0, 146 }, 147 [TYPE4] = { 148 .caps = HAS_INTEGRATED_BUTTON, 149 .button = 31, 150 .offset = 23 * 2, 151 .delta = 2, 152 }, 153 }; 154 155 /* trackpad finger structure - little endian */ 156 struct tp_finger { 157 uint16_t origin; /* zero when switching track finger */ 158 uint16_t abs_x; /* absolute x coodinate */ 159 uint16_t abs_y; /* absolute y coodinate */ 160 uint16_t rel_x; /* relative x coodinate */ 161 uint16_t rel_y; /* relative y coodinate */ 162 uint16_t tool_major; /* tool area, major axis */ 163 uint16_t tool_minor; /* tool area, minor axis */ 164 uint16_t orientation; /* 16384 when point, else 15 bit angle */ 165 uint16_t touch_major; /* touch area, major axis */ 166 uint16_t touch_minor; /* touch area, minor axis */ 167 uint16_t unused[2]; /* zeros */ 168 uint16_t pressure; /* pressure on forcetouch touchpad */ 169 uint16_t multi; /* one finger: varies, more fingers: 170 * constant */ 171 } __packed; 172 173 #define BCM5974_LE2H(x) ((int32_t)(int16_t)le16toh(x)) 174 175 /* trackpad finger data size, empirically at least ten fingers */ 176 #define MAX_FINGERS MAX_MT_SLOTS 177 178 #define MAX_FINGER_ORIENTATION 16384 179 180 enum { 181 BCM5974_FLAG_WELLSPRING1, 182 BCM5974_FLAG_WELLSPRING2, 183 BCM5974_FLAG_WELLSPRING3, 184 BCM5974_FLAG_WELLSPRING4, 185 BCM5974_FLAG_WELLSPRING4A, 186 BCM5974_FLAG_WELLSPRING5, 187 BCM5974_FLAG_WELLSPRING6A, 188 BCM5974_FLAG_WELLSPRING6, 189 BCM5974_FLAG_WELLSPRING5A, 190 BCM5974_FLAG_WELLSPRING7, 191 BCM5974_FLAG_WELLSPRING7A, 192 BCM5974_FLAG_WELLSPRING8, 193 BCM5974_FLAG_WELLSPRING9, 194 BCM5974_FLAG_MAX, 195 }; 196 197 /* device-specific parameters */ 198 struct bcm5974_axis { 199 int snratio; /* signal-to-noise ratio */ 200 int min; /* device minimum reading */ 201 int max; /* device maximum reading */ 202 int size; /* physical size, mm */ 203 }; 204 205 /* device-specific configuration */ 206 struct bcm5974_dev_params { 207 const struct tp_type_params* tp; 208 struct bcm5974_axis p; /* finger pressure limits */ 209 struct bcm5974_axis w; /* finger width limits */ 210 struct bcm5974_axis x; /* horizontal limits */ 211 struct bcm5974_axis y; /* vertical limits */ 212 struct bcm5974_axis o; /* orientation limits */ 213 }; 214 215 /* logical signal quality */ 216 #define SN_PRESSURE 45 /* pressure signal-to-noise ratio */ 217 #define SN_WIDTH 25 /* width signal-to-noise ratio */ 218 #define SN_COORD 250 /* coordinate signal-to-noise ratio */ 219 #define SN_ORIENT 10 /* orientation signal-to-noise ratio */ 220 221 static const struct bcm5974_dev_params bcm5974_dev_params[BCM5974_FLAG_MAX] = { 222 [BCM5974_FLAG_WELLSPRING1] = { 223 .tp = tp + TYPE1, 224 .p = { SN_PRESSURE, 0, 256, 0 }, 225 .w = { SN_WIDTH, 0, 2048, 0 }, 226 .x = { SN_COORD, -4824, 5342, 105 }, 227 .y = { SN_COORD, -172, 5820, 75 }, 228 .o = { SN_ORIENT, 229 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 230 }, 231 [BCM5974_FLAG_WELLSPRING2] = { 232 .tp = tp + TYPE1, 233 .p = { SN_PRESSURE, 0, 256, 0 }, 234 .w = { SN_WIDTH, 0, 2048, 0 }, 235 .x = { SN_COORD, -4824, 4824, 105 }, 236 .y = { SN_COORD, -172, 4290, 75 }, 237 .o = { SN_ORIENT, 238 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 239 }, 240 [BCM5974_FLAG_WELLSPRING3] = { 241 .tp = tp + TYPE2, 242 .p = { SN_PRESSURE, 0, 300, 0 }, 243 .w = { SN_WIDTH, 0, 2048, 0 }, 244 .x = { SN_COORD, -4460, 5166, 105 }, 245 .y = { SN_COORD, -75, 6700, 75 }, 246 .o = { SN_ORIENT, 247 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 248 }, 249 [BCM5974_FLAG_WELLSPRING4] = { 250 .tp = tp + TYPE2, 251 .p = { SN_PRESSURE, 0, 300, 0 }, 252 .w = { SN_WIDTH, 0, 2048, 0 }, 253 .x = { SN_COORD, -4620, 5140, 105 }, 254 .y = { SN_COORD, -150, 6600, 75 }, 255 .o = { SN_ORIENT, 256 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 257 }, 258 [BCM5974_FLAG_WELLSPRING4A] = { 259 .tp = tp + TYPE2, 260 .p = { SN_PRESSURE, 0, 300, 0 }, 261 .w = { SN_WIDTH, 0, 2048, 0 }, 262 .x = { SN_COORD, -4616, 5112, 105 }, 263 .y = { SN_COORD, -142, 5234, 75 }, 264 .o = { SN_ORIENT, 265 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 266 }, 267 [BCM5974_FLAG_WELLSPRING5] = { 268 .tp = tp + TYPE2, 269 .p = { SN_PRESSURE, 0, 300, 0 }, 270 .w = { SN_WIDTH, 0, 2048, 0 }, 271 .x = { SN_COORD, -4415, 5050, 105 }, 272 .y = { SN_COORD, -55, 6680, 75 }, 273 .o = { SN_ORIENT, 274 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 275 }, 276 [BCM5974_FLAG_WELLSPRING6] = { 277 .tp = tp + TYPE2, 278 .p = { SN_PRESSURE, 0, 300, 0 }, 279 .w = { SN_WIDTH, 0, 2048, 0 }, 280 .x = { SN_COORD, -4620, 5140, 105 }, 281 .y = { SN_COORD, -150, 6600, 75 }, 282 .o = { SN_ORIENT, 283 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 284 }, 285 [BCM5974_FLAG_WELLSPRING5A] = { 286 .tp = tp + TYPE2, 287 .p = { SN_PRESSURE, 0, 300, 0 }, 288 .w = { SN_WIDTH, 0, 2048, 0 }, 289 .x = { SN_COORD, -4750, 5280, 105 }, 290 .y = { SN_COORD, -150, 6730, 75 }, 291 .o = { SN_ORIENT, 292 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 293 }, 294 [BCM5974_FLAG_WELLSPRING6A] = { 295 .tp = tp + TYPE2, 296 .p = { SN_PRESSURE, 0, 300, 0 }, 297 .w = { SN_WIDTH, 0, 2048, 0 }, 298 .x = { SN_COORD, -4620, 5140, 105 }, 299 .y = { SN_COORD, -150, 6600, 75 }, 300 .o = { SN_ORIENT, 301 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 302 }, 303 [BCM5974_FLAG_WELLSPRING7] = { 304 .tp = tp + TYPE2, 305 .p = { SN_PRESSURE, 0, 300, 0 }, 306 .w = { SN_WIDTH, 0, 2048, 0 }, 307 .x = { SN_COORD, -4750, 5280, 105 }, 308 .y = { SN_COORD, -150, 6730, 75 }, 309 .o = { SN_ORIENT, 310 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 311 }, 312 [BCM5974_FLAG_WELLSPRING7A] = { 313 .tp = tp + TYPE2, 314 .p = { SN_PRESSURE, 0, 300, 0 }, 315 .w = { SN_WIDTH, 0, 2048, 0 }, 316 .x = { SN_COORD, -4750, 5280, 105 }, 317 .y = { SN_COORD, -150, 6730, 75 }, 318 .o = { SN_ORIENT, 319 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 320 }, 321 [BCM5974_FLAG_WELLSPRING8] = { 322 .tp = tp + TYPE3, 323 .p = { SN_PRESSURE, 0, 300, 0 }, 324 .w = { SN_WIDTH, 0, 2048, 0 }, 325 .x = { SN_COORD, -4620, 5140, 105 }, 326 .y = { SN_COORD, -150, 6600, 75 }, 327 .o = { SN_ORIENT, 328 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 329 }, 330 [BCM5974_FLAG_WELLSPRING9] = { 331 .tp = tp + TYPE4, 332 .p = { SN_PRESSURE, 0, 300, 0 }, 333 .w = { SN_WIDTH, 0, 2048, 0 }, 334 .x = { SN_COORD, -4828, 5345, 105 }, 335 .y = { SN_COORD, -203, 6803, 75 }, 336 .o = { SN_ORIENT, 337 -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION, 0 }, 338 }, 339 }; 340 341 #define BCM5974_DEV(v,p,i) { \ 342 HID_BVPI(BUS_USB, USB_VENDOR_##v, USB_PRODUCT_##v##_##p, i), \ 343 HID_TLC(BCM5974_TLC_PAGE, BCM5974_TLC_USAGE), \ 344 } 345 346 static const struct hid_device_id bcm5974_devs[] = { 347 /* MacbookAir1.1 */ 348 BCM5974_DEV(APPLE, WELLSPRING_ANSI, BCM5974_FLAG_WELLSPRING1), 349 BCM5974_DEV(APPLE, WELLSPRING_ISO, BCM5974_FLAG_WELLSPRING1), 350 BCM5974_DEV(APPLE, WELLSPRING_JIS, BCM5974_FLAG_WELLSPRING1), 351 352 /* MacbookProPenryn, aka wellspring2 */ 353 BCM5974_DEV(APPLE, WELLSPRING2_ANSI, BCM5974_FLAG_WELLSPRING2), 354 BCM5974_DEV(APPLE, WELLSPRING2_ISO, BCM5974_FLAG_WELLSPRING2), 355 BCM5974_DEV(APPLE, WELLSPRING2_JIS, BCM5974_FLAG_WELLSPRING2), 356 357 /* Macbook5,1 (unibody), aka wellspring3 */ 358 BCM5974_DEV(APPLE, WELLSPRING3_ANSI, BCM5974_FLAG_WELLSPRING3), 359 BCM5974_DEV(APPLE, WELLSPRING3_ISO, BCM5974_FLAG_WELLSPRING3), 360 BCM5974_DEV(APPLE, WELLSPRING3_JIS, BCM5974_FLAG_WELLSPRING3), 361 362 /* MacbookAir3,2 (unibody), aka wellspring4 */ 363 BCM5974_DEV(APPLE, WELLSPRING4_ANSI, BCM5974_FLAG_WELLSPRING4), 364 BCM5974_DEV(APPLE, WELLSPRING4_ISO, BCM5974_FLAG_WELLSPRING4), 365 BCM5974_DEV(APPLE, WELLSPRING4_JIS, BCM5974_FLAG_WELLSPRING4), 366 367 /* MacbookAir3,1 (unibody), aka wellspring4 */ 368 BCM5974_DEV(APPLE, WELLSPRING4A_ANSI, BCM5974_FLAG_WELLSPRING4A), 369 BCM5974_DEV(APPLE, WELLSPRING4A_ISO, BCM5974_FLAG_WELLSPRING4A), 370 BCM5974_DEV(APPLE, WELLSPRING4A_JIS, BCM5974_FLAG_WELLSPRING4A), 371 372 /* Macbook8 (unibody, March 2011) */ 373 BCM5974_DEV(APPLE, WELLSPRING5_ANSI, BCM5974_FLAG_WELLSPRING5), 374 BCM5974_DEV(APPLE, WELLSPRING5_ISO, BCM5974_FLAG_WELLSPRING5), 375 BCM5974_DEV(APPLE, WELLSPRING5_JIS, BCM5974_FLAG_WELLSPRING5), 376 377 /* MacbookAir4,1 (unibody, July 2011) */ 378 BCM5974_DEV(APPLE, WELLSPRING6A_ANSI, BCM5974_FLAG_WELLSPRING6A), 379 BCM5974_DEV(APPLE, WELLSPRING6A_ISO, BCM5974_FLAG_WELLSPRING6A), 380 BCM5974_DEV(APPLE, WELLSPRING6A_JIS, BCM5974_FLAG_WELLSPRING6A), 381 382 /* MacbookAir4,2 (unibody, July 2011) */ 383 BCM5974_DEV(APPLE, WELLSPRING6_ANSI, BCM5974_FLAG_WELLSPRING6), 384 BCM5974_DEV(APPLE, WELLSPRING6_ISO, BCM5974_FLAG_WELLSPRING6), 385 BCM5974_DEV(APPLE, WELLSPRING6_JIS, BCM5974_FLAG_WELLSPRING6), 386 387 /* Macbook8,2 (unibody) */ 388 BCM5974_DEV(APPLE, WELLSPRING5A_ANSI, BCM5974_FLAG_WELLSPRING5A), 389 BCM5974_DEV(APPLE, WELLSPRING5A_ISO, BCM5974_FLAG_WELLSPRING5A), 390 BCM5974_DEV(APPLE, WELLSPRING5A_JIS, BCM5974_FLAG_WELLSPRING5A), 391 392 /* MacbookPro10,1 (unibody, June 2012) */ 393 /* MacbookPro11,1-3 (unibody, June 2013) */ 394 BCM5974_DEV(APPLE, WELLSPRING7_ANSI, BCM5974_FLAG_WELLSPRING7), 395 BCM5974_DEV(APPLE, WELLSPRING7_ISO, BCM5974_FLAG_WELLSPRING7), 396 BCM5974_DEV(APPLE, WELLSPRING7_JIS, BCM5974_FLAG_WELLSPRING7), 397 398 /* MacbookPro10,2 (unibody, October 2012) */ 399 BCM5974_DEV(APPLE, WELLSPRING7A_ANSI, BCM5974_FLAG_WELLSPRING7A), 400 BCM5974_DEV(APPLE, WELLSPRING7A_ISO, BCM5974_FLAG_WELLSPRING7A), 401 BCM5974_DEV(APPLE, WELLSPRING7A_JIS, BCM5974_FLAG_WELLSPRING7A), 402 403 /* MacbookAir6,2 (unibody, June 2013) */ 404 BCM5974_DEV(APPLE, WELLSPRING8_ANSI, BCM5974_FLAG_WELLSPRING8), 405 BCM5974_DEV(APPLE, WELLSPRING8_ISO, BCM5974_FLAG_WELLSPRING8), 406 BCM5974_DEV(APPLE, WELLSPRING8_JIS, BCM5974_FLAG_WELLSPRING8), 407 408 /* MacbookPro12,1 MacbookPro11,4 */ 409 BCM5974_DEV(APPLE, WELLSPRING9_ANSI, BCM5974_FLAG_WELLSPRING9), 410 BCM5974_DEV(APPLE, WELLSPRING9_ISO, BCM5974_FLAG_WELLSPRING9), 411 BCM5974_DEV(APPLE, WELLSPRING9_JIS, BCM5974_FLAG_WELLSPRING9), 412 }; 413 414 struct bcm5974_softc { 415 device_t sc_dev; 416 struct evdev_dev *sc_evdev; 417 /* device configuration */ 418 const struct bcm5974_dev_params *sc_params; 419 bool sc_saved_mode; 420 }; 421 422 static const uint8_t bcm5974_rdesc[] = { 423 0x05, BCM5974_TLC_PAGE, /* Usage Page (BCM5974_TLC_PAGE) */ 424 0x09, BCM5974_TLC_USAGE,/* Usage (BCM5974_TLC_USAGE) */ 425 0xA1, 0x01, /* Collection (Application) */ 426 0x06, 0x00, 0xFF, /* Usage Page (Vendor Defined 0xFF00) */ 427 0x09, 0x01, /* Usage (0x01) */ 428 0x15, 0x00, /* Logical Minimum (0) */ 429 0x26, 0xFF, 0x00, /* Logical Maximum (255) */ 430 0x75, 0x08, /* Report Size (8) */ 431 0x96, /* Report Count (BCM5974_BUFFER_MAX) */ 432 BCM5974_BUFFER_MAX & 0xFF, 433 BCM5974_BUFFER_MAX >> 8 & 0xFF, 434 0x81, 0x02, /* Input (Data,Var,Abs) */ 435 0xC0, /* End Collection */ 436 }; 437 438 /* 439 * function prototypes 440 */ 441 static evdev_open_t bcm5974_ev_open; 442 static evdev_close_t bcm5974_ev_close; 443 static const struct evdev_methods bcm5974_evdev_methods = { 444 .ev_open = &bcm5974_ev_open, 445 .ev_close = &bcm5974_ev_close, 446 }; 447 static hid_intr_t bcm5974_intr; 448 449 /* Device methods. */ 450 static device_identify_t bcm5974_identify; 451 static device_probe_t bcm5974_probe; 452 static device_attach_t bcm5974_attach; 453 static device_detach_t bcm5974_detach; 454 455 /* 456 * Type1 and Type2 touchpads use keyboard USB interface to switch from HID to 457 * RAW mode. Although it is possible to extend hkbd driver to support such a 458 * mode change requests, it's not wanted due to cross device tree dependencies. 459 * So, find lowest common denominator (struct usb_device of grandparent usbhid 460 * driver) of touchpad and keyboard drivers and issue direct USB requests. 461 */ 462 static int 463 bcm5974_set_device_mode_usb(struct bcm5974_softc *sc, bool on) 464 { 465 uint8_t mode_bytes[BCM5974_USB_REPORT_LEN]; 466 struct usb_ctl_request ucr; 467 int err; 468 469 ucr.ucr_request.bmRequestType = UT_READ_CLASS_INTERFACE; 470 ucr.ucr_request.bRequest = UR_GET_REPORT; 471 USETW2(ucr.ucr_request.wValue, 472 UHID_FEATURE_REPORT, BCM5974_USB_REPORT_ID); 473 ucr.ucr_request.wIndex[0] = BCM5974_USB_IFACE_INDEX; 474 ucr.ucr_request.wIndex[1] = 0; 475 USETW(ucr.ucr_request.wLength, BCM5974_USB_REPORT_LEN); 476 ucr.ucr_data = mode_bytes; 477 478 err = hid_ioctl(sc->sc_dev, USB_REQUEST, (uintptr_t)&ucr); 479 if (err != 0) { 480 DPRINTF("Failed to read device mode (%d)\n", err); 481 return (EIO); 482 } 483 #if 0 484 /* 485 * XXX Need to wait at least 250ms for hardware to get 486 * ready. The device mode handling appears to be handled 487 * asynchronously and we should not issue these commands too 488 * quickly. 489 */ 490 pause("WHW", hz / 4); 491 #endif 492 mode_bytes[0] = on ? BCM5974_USB_MODE_RAW : BCM5974_USB_MODE_HID; 493 ucr.ucr_request.bmRequestType = UT_WRITE_CLASS_INTERFACE; 494 ucr.ucr_request.bRequest = UR_SET_REPORT; 495 496 err = hid_ioctl(sc->sc_dev, USB_REQUEST, (uintptr_t)&ucr); 497 if (err != 0) { 498 DPRINTF("Failed to write device mode (%d)\n", err); 499 return (EIO); 500 } 501 502 return (0); 503 } 504 505 static int 506 bcm5974_set_device_mode_hid(struct bcm5974_softc *sc, bool on) 507 { 508 uint8_t mode_bytes[BCM5974_HID_REPORT_LEN] = { 509 BCM5974_HID_REPORT_ID, 510 on ? BCM5974_HID_MODE_RAW : BCM5974_HID_MODE_HID, 511 }; 512 #if 0 513 int err; 514 515 err = hid_get_report(sc->sc_dev, mode_bytes, BCM5974_HID_REPORT_LEN, 516 NULL, HID_FEATURE_REPORT, BCM5974_HID_REPORT_ID); 517 if (err != 0) { 518 DPRINTF("Failed to read device mode (%d)\n", err); 519 return (err); 520 } 521 /* 522 * XXX Need to wait at least 250ms for hardware to get 523 * ready. The device mode handling appears to be handled 524 * asynchronously and we should not issue these commands too 525 * quickly. 526 */ 527 pause("WHW", hz / 4); 528 mode_bytes[1] = on ? BCM5974_HID_MODE_RAW : BCM5974_HID_MODE_HID; 529 #endif 530 return (hid_set_report(sc->sc_dev, mode_bytes, BCM5974_HID_REPORT_LEN, 531 HID_FEATURE_REPORT, BCM5974_HID_REPORT_ID)); 532 } 533 534 static int 535 bcm5974_set_device_mode(struct bcm5974_softc *sc, bool on) 536 { 537 int err = 0; 538 539 switch (sc->sc_params->tp - tp) { 540 case TYPE1: 541 case TYPE2: 542 err = bcm5974_set_device_mode_usb(sc, on); 543 break; 544 case TYPE3: /* Type 3 does not require a mode switch */ 545 break; 546 case TYPE4: 547 err = bcm5974_set_device_mode_hid(sc, on); 548 break; 549 default: 550 KASSERT(0 == 1, ("Unknown trackpad type")); 551 } 552 553 if (!err) 554 sc->sc_saved_mode = on; 555 556 return (err); 557 } 558 559 static void 560 bcm5974_identify(driver_t *driver, device_t parent) 561 { 562 void *d_ptr; 563 hid_size_t d_len; 564 565 /* 566 * The bcm5974 touchpad has no stable RAW mode TLC in its report 567 * descriptor. So replace existing HID mode mouse TLC with dummy one 568 * to set proper transport layer buffer sizes, make driver probe 569 * simpler and prevent unwanted hms driver attachment. 570 */ 571 if (HIDBUS_LOOKUP_ID(parent, bcm5974_devs) != NULL && 572 hid_get_report_descr(parent, &d_ptr, &d_len) == 0 && 573 hid_is_mouse(d_ptr, d_len)) 574 hid_set_report_descr(parent, bcm5974_rdesc, 575 sizeof(bcm5974_rdesc)); 576 } 577 578 static int 579 bcm5974_probe(device_t dev) 580 { 581 int err; 582 583 err = HIDBUS_LOOKUP_DRIVER_INFO(dev, bcm5974_devs); 584 if (err != 0) 585 return (err); 586 587 hidbus_set_desc(dev, "Touchpad"); 588 589 return (BUS_PROBE_DEFAULT); 590 } 591 592 static int 593 bcm5974_attach(device_t dev) 594 { 595 struct bcm5974_softc *sc = device_get_softc(dev); 596 const struct hid_device_info *hw = hid_get_device_info(dev); 597 int err; 598 599 DPRINTFN(BCM5974_LLEVEL_INFO, "sc=%p\n", sc); 600 601 sc->sc_dev = dev; 602 603 /* get device specific configuration */ 604 sc->sc_params = bcm5974_dev_params + hidbus_get_driver_info(dev); 605 606 sc->sc_evdev = evdev_alloc(); 607 evdev_set_name(sc->sc_evdev, device_get_desc(dev)); 608 evdev_set_phys(sc->sc_evdev, device_get_nameunit(dev)); 609 evdev_set_id(sc->sc_evdev, hw->idBus, hw->idVendor, hw->idProduct, 610 hw->idVersion); 611 evdev_set_serial(sc->sc_evdev, hw->serial); 612 evdev_set_methods(sc->sc_evdev, sc, &bcm5974_evdev_methods); 613 evdev_support_prop(sc->sc_evdev, INPUT_PROP_POINTER); 614 evdev_support_event(sc->sc_evdev, EV_SYN); 615 evdev_support_event(sc->sc_evdev, EV_ABS); 616 evdev_support_event(sc->sc_evdev, EV_KEY); 617 evdev_set_flag(sc->sc_evdev, EVDEV_FLAG_EXT_EPOCH); /* hidbus child */ 618 619 #define BCM5974_ABS(evdev, code, param) \ 620 evdev_support_abs((evdev), (code), (param).min, (param).max, \ 621 ((param).max - (param).min) / (param).snratio, 0, \ 622 (param).size != 0 ? ((param).max - (param).min) / (param).size : 0); 623 624 /* finger position */ 625 BCM5974_ABS(sc->sc_evdev, ABS_MT_POSITION_X, sc->sc_params->x); 626 BCM5974_ABS(sc->sc_evdev, ABS_MT_POSITION_Y, sc->sc_params->y); 627 /* finger pressure */ 628 BCM5974_ABS(sc->sc_evdev, ABS_MT_PRESSURE, sc->sc_params->p); 629 /* finger touch area */ 630 BCM5974_ABS(sc->sc_evdev, ABS_MT_TOUCH_MAJOR, sc->sc_params->w); 631 BCM5974_ABS(sc->sc_evdev, ABS_MT_TOUCH_MINOR, sc->sc_params->w); 632 /* finger approach area */ 633 BCM5974_ABS(sc->sc_evdev, ABS_MT_WIDTH_MAJOR, sc->sc_params->w); 634 BCM5974_ABS(sc->sc_evdev, ABS_MT_WIDTH_MINOR, sc->sc_params->w); 635 /* finger orientation */ 636 BCM5974_ABS(sc->sc_evdev, ABS_MT_ORIENTATION, sc->sc_params->o); 637 /* button properties */ 638 evdev_support_key(sc->sc_evdev, BTN_LEFT); 639 if ((sc->sc_params->tp->caps & HAS_INTEGRATED_BUTTON) != 0) 640 evdev_support_prop(sc->sc_evdev, INPUT_PROP_BUTTONPAD); 641 /* Enable automatic touch assignment for type B MT protocol */ 642 evdev_support_abs(sc->sc_evdev, ABS_MT_SLOT, 643 0, MAX_FINGERS - 1, 0, 0, 0); 644 evdev_support_abs(sc->sc_evdev, ABS_MT_TRACKING_ID, 645 -1, MAX_FINGERS - 1, 0, 0, 0); 646 evdev_set_flag(sc->sc_evdev, EVDEV_FLAG_MT_TRACK); 647 evdev_set_flag(sc->sc_evdev, EVDEV_FLAG_MT_AUTOREL); 648 /* Synaptics compatibility events */ 649 evdev_set_flag(sc->sc_evdev, EVDEV_FLAG_MT_STCOMPAT); 650 651 err = evdev_register(sc->sc_evdev); 652 if (err) 653 goto detach; 654 655 hidbus_set_intr(dev, bcm5974_intr, sc); 656 657 return (0); 658 659 detach: 660 bcm5974_detach(dev); 661 return (ENOMEM); 662 } 663 664 static int 665 bcm5974_detach(device_t dev) 666 { 667 struct bcm5974_softc *sc = device_get_softc(dev); 668 669 evdev_free(sc->sc_evdev); 670 671 return (0); 672 } 673 674 static int 675 bcm5974_resume(device_t dev) 676 { 677 struct bcm5974_softc *sc = device_get_softc(dev); 678 679 bcm5974_set_device_mode(sc, sc->sc_saved_mode); 680 681 return (0); 682 } 683 684 static void 685 bcm5974_intr(void *context, void *data, hid_size_t len) 686 { 687 struct bcm5974_softc *sc = context; 688 const struct bcm5974_dev_params *params = sc->sc_params; 689 union evdev_mt_slot slot_data; 690 struct tp_finger *f; 691 int ntouch; /* the finger number in touch */ 692 int ibt; /* button status */ 693 int i; 694 int slot; 695 uint8_t fsize = sizeof(struct tp_finger) + params->tp->delta; 696 697 if ((len < params->tp->offset + fsize) || 698 ((len - params->tp->offset) % fsize) != 0) { 699 DPRINTFN(BCM5974_LLEVEL_INFO, "Invalid length: %d, %x, %x\n", 700 len, sc->tp_data[0], sc->tp_data[1]); 701 return; 702 } 703 704 ibt = ((uint8_t *)data)[params->tp->button]; 705 ntouch = (len - params->tp->offset) / fsize; 706 707 for (i = 0, slot = 0; i != ntouch; i++) { 708 f = (struct tp_finger *)(((uint8_t *)data) + 709 params->tp->offset + params->tp->delta + i * fsize); 710 DPRINTFN(BCM5974_LLEVEL_INFO, 711 "[%d]ibt=%d, taps=%d, o=%4d, ax=%5d, ay=%5d, " 712 "rx=%5d, ry=%5d, tlmaj=%4d, tlmin=%4d, ot=%4x, " 713 "tchmaj=%4d, tchmin=%4d, pressure=%4d, m=%4x\n", 714 i, ibt, ntouch, BCM5974_LE2H(f->origin), 715 BCM5974_LE2H(f->abs_x), BCM5974_LE2H(f->abs_y), 716 BCM5974_LE2H(f->rel_x), BCM5974_LE2H(f->rel_y), 717 BCM5974_LE2H(f->tool_major), BCM5974_LE2H(f->tool_minor), 718 BCM5974_LE2H(f->orientation), BCM5974_LE2H(f->touch_major), 719 BCM5974_LE2H(f->touch_minor), BCM5974_LE2H(f->pressure), 720 BCM5974_LE2H(f->multi)); 721 722 if (BCM5974_LE2H(f->touch_major) == 0) 723 continue; 724 slot_data = (union evdev_mt_slot) { 725 .id = slot, 726 .x = BCM5974_LE2H(f->abs_x), 727 .y = params->y.min + params->y.max - 728 BCM5974_LE2H(f->abs_y), 729 .p = BCM5974_LE2H(f->pressure), 730 .maj = BCM5974_LE2H(f->touch_major) << 1, 731 .min = BCM5974_LE2H(f->touch_minor) << 1, 732 .w_maj = BCM5974_LE2H(f->tool_major) << 1, 733 .w_min = BCM5974_LE2H(f->tool_minor) << 1, 734 .ori = params->o.max - BCM5974_LE2H(f->orientation), 735 }; 736 evdev_mt_push_slot(sc->sc_evdev, slot, &slot_data); 737 slot++; 738 } 739 740 evdev_push_key(sc->sc_evdev, BTN_LEFT, ibt); 741 evdev_sync(sc->sc_evdev); 742 } 743 744 static int 745 bcm5974_ev_open(struct evdev_dev *evdev) 746 { 747 struct bcm5974_softc *sc = evdev_get_softc(evdev); 748 int err; 749 750 /* 751 * By default the touchpad behaves like a HID device, sending 752 * packets with reportID = 8. Such reports contain only 753 * limited information. They encode movement deltas and button 754 * events, but do not include data from the pressure 755 * sensors. The device input mode can be switched from HID 756 * reports to raw sensor data using vendor-specific USB 757 * control commands: 758 */ 759 err = bcm5974_set_device_mode(sc, true); 760 if (err != 0) { 761 DPRINTF("failed to set mode to RAW MODE (%d)\n", err); 762 return (err); 763 } 764 765 return (hidbus_intr_start(sc->sc_dev)); 766 } 767 768 static int 769 bcm5974_ev_close(struct evdev_dev *evdev) 770 { 771 struct bcm5974_softc *sc = evdev_get_softc(evdev); 772 int err; 773 774 err = hidbus_intr_stop(sc->sc_dev); 775 if (err != 0) 776 return (err); 777 778 /* 779 * During re-enumeration of the device we need to force the 780 * device back into HID mode before switching it to RAW 781 * mode. Else the device does not work like expected. 782 */ 783 err = bcm5974_set_device_mode(sc, false); 784 if (err != 0) 785 DPRINTF("Failed to set mode to HID MODE (%d)\n", err); 786 787 return (err); 788 } 789 790 static device_method_t bcm5974_methods[] = { 791 /* Device interface */ 792 DEVMETHOD(device_identify, bcm5974_identify), 793 DEVMETHOD(device_probe, bcm5974_probe), 794 DEVMETHOD(device_attach, bcm5974_attach), 795 DEVMETHOD(device_detach, bcm5974_detach), 796 DEVMETHOD(device_resume, bcm5974_resume), 797 DEVMETHOD_END 798 }; 799 800 static driver_t bcm5974_driver = { 801 .name = "bcm5974", 802 .methods = bcm5974_methods, 803 .size = sizeof(struct bcm5974_softc) 804 }; 805 806 DRIVER_MODULE(bcm5974, hidbus, bcm5974_driver, NULL, NULL); 807 MODULE_DEPEND(bcm5974, hidbus, 1, 1, 1); 808 MODULE_DEPEND(bcm5974, hid, 1, 1, 1); 809 MODULE_DEPEND(bcm5974, evdev, 1, 1, 1); 810 MODULE_VERSION(bcm5974, 1); 811 HID_PNP_INFO(bcm5974_devs);
Cache object: 822df85601fd4dfe41168ffd32317df3
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