Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/misc/cp2112.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) Andriy Gapon 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions, and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29 /* 30 * Hardware information links: 31 * - CP2112 Datasheet 32 * https://www.silabs.com/documents/public/data-sheets/cp2112-datasheet.pdf 33 * - AN495: CP2112 Interface Specification 34 * https://www.silabs.com/documents/public/application-notes/an495-cp2112-interface-specification.pdf 35 * - CP2112 Errata 36 * https://www.silabs.com/documents/public/errata/cp2112-errata.pdf 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/condvar.h> 45 #include <sys/bus.h> 46 #include <sys/gpio.h> 47 #include <sys/kernel.h> 48 #include <sys/lock.h> 49 #include <sys/module.h> 50 #include <sys/mutex.h> 51 #include <sys/sdt.h> 52 #include <sys/sx.h> 53 54 #include <dev/gpio/gpiobusvar.h> 55 56 #include <dev/iicbus/iiconf.h> 57 #include <dev/iicbus/iicbus.h> 58 #include "iicbus_if.h" 59 60 #include <dev/usb/usb.h> 61 #include <dev/usb/usbdi.h> 62 #include <dev/usb/usbdi_util.h> 63 #include <dev/usb/usbhid.h> 64 #include "usbdevs.h" 65 66 #define USB_DEBUG_VAR usb_debug 67 #include <dev/usb/usb_debug.h> 68 69 #define SIZEOF_FIELD(_s, _f) sizeof(((struct _s *)NULL)->_f) 70 71 #define CP2112GPIO_LOCK(sc) sx_xlock(&sc->gpio_lock) 72 #define CP2112GPIO_UNLOCK(sc) sx_xunlock(&sc->gpio_lock) 73 #define CP2112GPIO_LOCKED(sc) sx_assert(&sc->gpio_lock, SX_XLOCKED) 74 75 #define CP2112_PART_NUM 0x0c 76 #define CP2112_GPIO_COUNT 8 77 #define CP2112_REPORT_SIZE 64 78 79 #define CP2112_REQ_RESET 0x1 80 #define CP2112_REQ_GPIO_CFG 0x2 81 #define CP2112_REQ_GPIO_GET 0x3 82 #define CP2112_REQ_GPIO_SET 0x4 83 #define CP2112_REQ_VERSION 0x5 84 #define CP2112_REQ_SMB_CFG 0x6 85 86 #define CP2112_REQ_SMB_READ 0x10 87 #define CP2112_REQ_SMB_WRITE_READ 0x11 88 #define CP2112_REQ_SMB_READ_FORCE_SEND 0x12 89 #define CP2112_REQ_SMB_READ_RESPONSE 0x13 90 #define CP2112_REQ_SMB_WRITE 0x14 91 #define CP2112_REQ_SMB_XFER_STATUS_REQ 0x15 92 #define CP2112_REQ_SMB_XFER_STATUS_RESP 0x16 93 #define CP2112_REQ_SMB_CANCEL 0x17 94 95 #define CP2112_REQ_LOCK 0x20 96 #define CP2112_REQ_USB_CFG 0x21 97 98 #define CP2112_IIC_MAX_READ_LEN 512 99 #define CP2112_IIC_REPSTART_VER 2 /* Erratum CP2112_E10. */ 100 101 #define CP2112_GPIO_SPEC_CLK7 1 /* Pin 7 is clock output. */ 102 #define CP2112_GPIO_SPEC_TX0 2 /* Pin 0 pulses on USB TX. */ 103 #define CP2112_GPIO_SPEC_RX1 4 /* Pin 1 pulses on USB RX. */ 104 105 #define CP2112_IIC_STATUS0_IDLE 0 106 #define CP2112_IIC_STATUS0_BUSY 1 107 #define CP2112_IIC_STATUS0_CMP 2 108 #define CP2112_IIC_STATUS0_ERROR 3 109 110 #define CP2112_IIC_STATUS1_TIMEOUT_NACK 0 111 #define CP2112_IIC_STATUS1_TIMEOUT_BUS 1 112 #define CP2112_IIC_STATUS1_ARB_LOST 2 113 114 /* CP2112_REQ_VERSION */ 115 struct version_request { 116 uint8_t id; 117 uint8_t part_num; 118 uint8_t version; 119 } __packed; 120 121 /* CP2112_REQ_GPIO_GET */ 122 struct gpio_get_req { 123 uint8_t id; 124 uint8_t state; 125 } __packed; 126 127 /* CP2112_REQ_GPIO_SET */ 128 struct gpio_set_req { 129 uint8_t id; 130 uint8_t state; 131 uint8_t mask; 132 } __packed; 133 134 /* CP2112_REQ_GPIO_CFG */ 135 struct gpio_config_req { 136 uint8_t id; 137 uint8_t output; 138 uint8_t pushpull; 139 uint8_t special; 140 uint8_t divider; 141 } __packed; 142 143 /* CP2112_REQ_SMB_XFER_STATUS_REQ */ 144 struct i2c_xfer_status_req { 145 uint8_t id; 146 uint8_t request; 147 } __packed; 148 149 /* CP2112_REQ_SMB_XFER_STATUS_RESP */ 150 struct i2c_xfer_status_resp { 151 uint8_t id; 152 uint8_t status0; 153 uint8_t status1; 154 uint16_t status2; 155 uint16_t status3; 156 } __packed; 157 158 /* CP2112_REQ_SMB_READ_FORCE_SEND */ 159 struct i2c_data_read_force_send_req { 160 uint8_t id; 161 uint16_t len; 162 } __packed; 163 164 /* CP2112_REQ_SMB_READ_RESPONSE */ 165 struct i2c_data_read_resp { 166 uint8_t id; 167 uint8_t status; 168 uint8_t len; 169 uint8_t data[61]; 170 } __packed; 171 172 /* CP2112_REQ_SMB_READ */ 173 struct i2c_write_read_req { 174 uint8_t id; 175 uint8_t slave; 176 uint16_t rlen; 177 uint8_t wlen; 178 uint8_t wdata[16]; 179 } __packed; 180 181 /* CP2112_REQ_SMB_WRITE */ 182 struct i2c_read_req { 183 uint8_t id; 184 uint8_t slave; 185 uint16_t len; 186 } __packed; 187 188 /* CP2112_REQ_SMB_WRITE_READ */ 189 struct i2c_write_req { 190 uint8_t id; 191 uint8_t slave; 192 uint8_t len; 193 uint8_t data[61]; 194 } __packed; 195 196 /* CP2112_REQ_SMB_CFG */ 197 struct i2c_cfg_req { 198 uint8_t id; 199 uint32_t speed; /* Hz */ 200 uint8_t slave_addr; /* ACK only */ 201 uint8_t auto_send_read; /* boolean */ 202 uint16_t write_timeout; /* 0-1000 ms, 0 ~ no timeout */ 203 uint16_t read_timeout; /* 0-1000 ms, 0 ~ no timeout */ 204 uint8_t scl_low_timeout;/* boolean */ 205 uint16_t retry_count; /* 1-1000, 0 ~ forever */ 206 } __packed; 207 208 enum cp2112_out_mode { 209 OUT_OD, 210 OUT_PP, 211 OUT_KEEP 212 }; 213 214 enum { 215 CP2112_INTR_OUT = 0, 216 CP2112_INTR_IN, 217 CP2112_N_TRANSFER, 218 }; 219 220 struct cp2112_softc { 221 device_t sc_gpio_dev; 222 device_t sc_iic_dev; 223 struct usb_device *sc_udev; 224 uint8_t sc_iface_index; 225 uint8_t sc_version; 226 }; 227 228 struct cp2112gpio_softc { 229 struct sx gpio_lock; 230 device_t busdev; 231 int gpio_caps; 232 struct gpio_pin pins[CP2112_GPIO_COUNT]; 233 }; 234 235 struct cp2112iic_softc { 236 device_t dev; 237 device_t iicbus_dev; 238 struct usb_xfer *xfers[CP2112_N_TRANSFER]; 239 u_char own_addr; 240 struct { 241 struct mtx lock; 242 struct cv cv; 243 struct { 244 uint8_t *data; 245 int len; 246 int done; 247 int error; 248 } in; 249 struct { 250 const uint8_t *data; 251 int len; 252 int done; 253 int error; 254 } out; 255 } io; 256 }; 257 258 static int cp2112_detach(device_t dev); 259 static int cp2112gpio_detach(device_t dev); 260 static int cp2112iic_detach(device_t dev); 261 262 static const STRUCT_USB_HOST_ID cp2112_devs[] = { 263 { USB_VP(USB_VENDOR_SILABS, USB_PRODUCT_SILABS_CP2112) }, 264 { USB_VP(0x1009, USB_PRODUCT_SILABS_CP2112) }, /* XXX */ 265 }; 266 267 static int 268 cp2112_get_report(device_t dev, uint8_t id, void *data, uint16_t len) 269 { 270 struct cp2112_softc *sc; 271 int err; 272 273 sc = device_get_softc(dev); 274 err = usbd_req_get_report(sc->sc_udev, NULL, data, 275 len, sc->sc_iface_index, UHID_FEATURE_REPORT, id); 276 return (err); 277 } 278 279 static int 280 cp2112_set_report(device_t dev, uint8_t id, void *data, uint16_t len) 281 { 282 struct cp2112_softc *sc; 283 int err; 284 285 sc = device_get_softc(dev); 286 *(uint8_t *)data = id; 287 err = usbd_req_set_report(sc->sc_udev, NULL, data, 288 len, sc->sc_iface_index, UHID_FEATURE_REPORT, id); 289 return (err); 290 } 291 292 static int 293 cp2112_probe(device_t dev) 294 { 295 struct usb_attach_arg *uaa; 296 297 uaa = device_get_ivars(dev); 298 if (uaa->usb_mode != USB_MODE_HOST) 299 return (ENXIO); 300 if (uaa->info.bInterfaceClass != UICLASS_HID) 301 return (ENXIO); 302 303 if (usbd_lookup_id_by_uaa(cp2112_devs, sizeof(cp2112_devs), uaa) == 0) 304 return (BUS_PROBE_DEFAULT); 305 return (ENXIO); 306 } 307 308 static int 309 cp2112_attach(device_t dev) 310 { 311 struct version_request vdata; 312 struct usb_attach_arg *uaa; 313 struct cp2112_softc *sc; 314 int err; 315 316 uaa = device_get_ivars(dev); 317 sc = device_get_softc(dev); 318 319 device_set_usb_desc(dev); 320 321 sc->sc_udev = uaa->device; 322 sc->sc_iface_index = uaa->info.bIfaceIndex; 323 324 err = cp2112_get_report(dev, CP2112_REQ_VERSION, &vdata, sizeof(vdata)); 325 if (err != 0) 326 goto detach; 327 device_printf(dev, "part number 0x%02x, version 0x%02x\n", 328 vdata.part_num, vdata.version); 329 if (vdata.part_num != CP2112_PART_NUM) { 330 device_printf(dev, "unsupported part number\n"); 331 goto detach; 332 } 333 sc->sc_version = vdata.version; 334 sc->sc_gpio_dev = device_add_child(dev, "gpio", -1); 335 if (sc->sc_gpio_dev != NULL) { 336 err = device_probe_and_attach(sc->sc_gpio_dev); 337 if (err != 0) { 338 device_printf(dev, "failed to attach gpio child\n"); 339 } 340 } else { 341 device_printf(dev, "failed to create gpio child\n"); 342 } 343 344 sc->sc_iic_dev = device_add_child(dev, "iichb", -1); 345 if (sc->sc_iic_dev != NULL) { 346 err = device_probe_and_attach(sc->sc_iic_dev); 347 if (err != 0) { 348 device_printf(dev, "failed to attach iic child\n"); 349 } 350 } else { 351 device_printf(dev, "failed to create iic child\n"); 352 } 353 354 return (0); 355 356 detach: 357 cp2112_detach(dev); 358 return (ENXIO); 359 } 360 361 static int 362 cp2112_detach(device_t dev) 363 { 364 int err; 365 366 err = bus_generic_detach(dev); 367 if (err != 0) 368 return (err); 369 device_delete_children(dev); 370 return (0); 371 } 372 373 static int 374 cp2112_gpio_read_pin(device_t dev, uint32_t pin_num, bool *on) 375 { 376 struct gpio_get_req data; 377 struct cp2112gpio_softc *sc __diagused; 378 int err; 379 380 sc = device_get_softc(dev); 381 CP2112GPIO_LOCKED(sc); 382 383 err = cp2112_get_report(device_get_parent(dev), 384 CP2112_REQ_GPIO_GET, &data, sizeof(data)); 385 if (err != 0) 386 return (err); 387 *on = (data.state & ((uint8_t)1 << pin_num)) != 0; 388 return (0); 389 390 } 391 392 static int 393 cp2112_gpio_write_pin(device_t dev, uint32_t pin_num, bool on) 394 { 395 struct gpio_set_req data; 396 struct cp2112gpio_softc *sc __diagused; 397 int err; 398 bool actual; 399 400 sc = device_get_softc(dev); 401 CP2112GPIO_LOCKED(sc); 402 403 data.state = (uint8_t)on << pin_num; 404 data.mask = (uint8_t)1 << pin_num; 405 err = cp2112_set_report(device_get_parent(dev), 406 CP2112_REQ_GPIO_SET, &data, sizeof(data)); 407 if (err != 0) 408 return (err); 409 err = cp2112_gpio_read_pin(dev, pin_num, &actual); 410 if (err != 0) 411 return (err); 412 if (actual != on) 413 return (EIO); 414 return (0); 415 } 416 417 static int 418 cp2112_gpio_configure_write_pin(device_t dev, uint32_t pin_num, 419 bool output, enum cp2112_out_mode *mode) 420 { 421 struct gpio_config_req data; 422 struct cp2112gpio_softc *sc __diagused; 423 int err; 424 uint8_t mask; 425 426 sc = device_get_softc(dev); 427 CP2112GPIO_LOCKED(sc); 428 429 err = cp2112_get_report(device_get_parent(dev), 430 CP2112_REQ_GPIO_CFG, &data, sizeof(data)); 431 if (err != 0) 432 return (err); 433 434 mask = (uint8_t)1 << pin_num; 435 if (output) { 436 data.output |= mask; 437 switch (*mode) { 438 case OUT_PP: 439 data.pushpull |= mask; 440 break; 441 case OUT_OD: 442 data.pushpull &= ~mask; 443 break; 444 default: 445 break; 446 } 447 } else { 448 data.output &= ~mask; 449 } 450 451 err = cp2112_set_report(device_get_parent(dev), 452 CP2112_REQ_GPIO_CFG, &data, sizeof(data)); 453 if (err != 0) 454 return (err); 455 456 /* Read back and verify. */ 457 err = cp2112_get_report(device_get_parent(dev), 458 CP2112_REQ_GPIO_CFG, &data, sizeof(data)); 459 if (err != 0) 460 return (err); 461 462 if (((data.output & mask) != 0) != output) 463 return (EIO); 464 if (output) { 465 switch (*mode) { 466 case OUT_PP: 467 if ((data.pushpull & mask) == 0) 468 return (EIO); 469 break; 470 case OUT_OD: 471 if ((data.pushpull & mask) != 0) 472 return (EIO); 473 break; 474 default: 475 *mode = (data.pushpull & mask) != 0 ? 476 OUT_PP : OUT_OD; 477 break; 478 } 479 } 480 return (0); 481 } 482 483 static device_t 484 cp2112_gpio_get_bus(device_t dev) 485 { 486 struct cp2112gpio_softc *sc; 487 488 sc = device_get_softc(dev); 489 return (sc->busdev); 490 } 491 492 static int 493 cp2112_gpio_pin_max(device_t dev, int *maxpin) 494 { 495 496 *maxpin = CP2112_GPIO_COUNT - 1; 497 return (0); 498 } 499 500 static int 501 cp2112_gpio_pin_set(device_t dev, uint32_t pin_num, uint32_t pin_value) 502 { 503 struct cp2112gpio_softc *sc; 504 int err; 505 506 if (pin_num >= CP2112_GPIO_COUNT) 507 return (EINVAL); 508 509 sc = device_get_softc(dev); 510 CP2112GPIO_LOCK(sc); 511 err = cp2112_gpio_write_pin(dev, pin_num, pin_value != 0); 512 CP2112GPIO_UNLOCK(sc); 513 514 return (err); 515 } 516 517 static int 518 cp2112_gpio_pin_get(device_t dev, uint32_t pin_num, uint32_t *pin_value) 519 { 520 struct cp2112gpio_softc *sc; 521 int err; 522 bool on; 523 524 if (pin_num >= CP2112_GPIO_COUNT) 525 return (EINVAL); 526 527 sc = device_get_softc(dev); 528 CP2112GPIO_LOCK(sc); 529 err = cp2112_gpio_read_pin(dev, pin_num, &on); 530 CP2112GPIO_UNLOCK(sc); 531 532 if (err == 0) 533 *pin_value = on; 534 return (err); 535 } 536 537 static int 538 cp2112_gpio_pin_toggle(device_t dev, uint32_t pin_num) 539 { 540 struct cp2112gpio_softc *sc; 541 int err; 542 bool on; 543 544 if (pin_num >= CP2112_GPIO_COUNT) 545 return (EINVAL); 546 547 sc = device_get_softc(dev); 548 CP2112GPIO_LOCK(sc); 549 err = cp2112_gpio_read_pin(dev, pin_num, &on); 550 if (err == 0) 551 err = cp2112_gpio_write_pin(dev, pin_num, !on); 552 CP2112GPIO_UNLOCK(sc); 553 554 return (err); 555 } 556 557 static int 558 cp2112_gpio_pin_getcaps(device_t dev, uint32_t pin_num, uint32_t *caps) 559 { 560 struct cp2112gpio_softc *sc; 561 562 if (pin_num >= CP2112_GPIO_COUNT) 563 return (EINVAL); 564 565 sc = device_get_softc(dev); 566 CP2112GPIO_LOCK(sc); 567 *caps = sc->gpio_caps; 568 CP2112GPIO_UNLOCK(sc); 569 570 return (0); 571 } 572 573 static int 574 cp2112_gpio_pin_getflags(device_t dev, uint32_t pin_num, uint32_t *flags) 575 { 576 struct cp2112gpio_softc *sc; 577 578 if (pin_num >= CP2112_GPIO_COUNT) 579 return (EINVAL); 580 581 sc = device_get_softc(dev); 582 CP2112GPIO_LOCK(sc); 583 *flags = sc->pins[pin_num].gp_flags; 584 CP2112GPIO_UNLOCK(sc); 585 586 return (0); 587 } 588 589 static int 590 cp2112_gpio_pin_getname(device_t dev, uint32_t pin_num, char *name) 591 { 592 struct cp2112gpio_softc *sc; 593 594 if (pin_num >= CP2112_GPIO_COUNT) 595 return (EINVAL); 596 597 sc = device_get_softc(dev); 598 CP2112GPIO_LOCK(sc); 599 memcpy(name, sc->pins[pin_num].gp_name, GPIOMAXNAME); 600 CP2112GPIO_UNLOCK(sc); 601 602 return (0); 603 } 604 605 static int 606 cp2112_gpio_pin_setflags(device_t dev, uint32_t pin_num, uint32_t flags) 607 { 608 struct cp2112gpio_softc *sc; 609 struct gpio_pin *pin; 610 enum cp2112_out_mode out_mode; 611 int err; 612 613 if (pin_num >= CP2112_GPIO_COUNT) 614 return (EINVAL); 615 616 sc = device_get_softc(dev); 617 if ((flags & sc->gpio_caps) != flags) 618 return (EINVAL); 619 620 if ((flags & (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)) == 0) 621 return (EINVAL); 622 if ((flags & (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)) == 623 (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)) { 624 return (EINVAL); 625 } 626 if ((flags & GPIO_PIN_INPUT) != 0) { 627 if ((flags & (GPIO_PIN_OPENDRAIN | GPIO_PIN_PUSHPULL)) != 0) 628 return (EINVAL); 629 } else { 630 if ((flags & (GPIO_PIN_OPENDRAIN | GPIO_PIN_PUSHPULL)) == 631 (GPIO_PIN_OPENDRAIN | GPIO_PIN_PUSHPULL)) 632 return (EINVAL); 633 } 634 635 /* 636 * If neither push-pull or open-drain is explicitly requested, then 637 * preserve the current state. 638 */ 639 out_mode = OUT_KEEP; 640 if ((flags & GPIO_PIN_OUTPUT) != 0) { 641 if ((flags & GPIO_PIN_OPENDRAIN) != 0) 642 out_mode = OUT_OD; 643 if ((flags & GPIO_PIN_PUSHPULL) != 0) 644 out_mode = OUT_PP; 645 } 646 647 CP2112GPIO_LOCK(sc); 648 pin = &sc->pins[pin_num]; 649 err = cp2112_gpio_configure_write_pin(dev, pin_num, 650 (flags & GPIO_PIN_OUTPUT) != 0, &out_mode); 651 if (err == 0) { 652 /* 653 * If neither open-drain or push-pull was requested, then see 654 * what hardware actually had. Otherwise, it has been 655 * reconfigured as requested. 656 */ 657 if ((flags & GPIO_PIN_OUTPUT) != 0 && 658 (flags & (GPIO_PIN_OPENDRAIN | GPIO_PIN_PUSHPULL)) == 0) { 659 KASSERT(out_mode != OUT_KEEP, 660 ("impossible current output mode")); 661 if (out_mode == OUT_OD) 662 flags |= GPIO_PIN_OPENDRAIN; 663 else 664 flags |= GPIO_PIN_PUSHPULL; 665 } 666 pin->gp_flags = flags; 667 } 668 CP2112GPIO_UNLOCK(sc); 669 670 return (err); 671 } 672 673 static int 674 cp2112gpio_probe(device_t dev) 675 { 676 device_set_desc(dev, "CP2112 GPIO interface"); 677 return (BUS_PROBE_SPECIFIC); 678 } 679 680 static int 681 cp2112gpio_attach(device_t dev) 682 { 683 struct gpio_config_req data; 684 struct cp2112gpio_softc *sc; 685 device_t cp2112; 686 int err; 687 int i; 688 uint8_t mask; 689 690 cp2112 = device_get_parent(dev); 691 sc = device_get_softc(dev); 692 sx_init(&sc->gpio_lock, "cp2112 lock"); 693 694 sc->gpio_caps = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | GPIO_PIN_OPENDRAIN | 695 GPIO_PIN_PUSHPULL; 696 697 err = cp2112_get_report(cp2112, CP2112_REQ_GPIO_CFG, 698 &data, sizeof(data)); 699 if (err != 0) 700 goto detach; 701 702 for (i = 0; i < CP2112_GPIO_COUNT; i++) { 703 struct gpio_pin *pin; 704 705 mask = (uint8_t)1 << i; 706 pin = &sc->pins[i]; 707 pin->gp_flags = 0; 708 709 snprintf(pin->gp_name, GPIOMAXNAME, "GPIO%u", i); 710 pin->gp_name[GPIOMAXNAME - 1] = '\0'; 711 712 if ((i == 0 && (data.special & CP2112_GPIO_SPEC_TX0) != 0) || 713 (i == 1 && (data.special & CP2112_GPIO_SPEC_RX1) != 0) || 714 (i == 7 && (data.special & CP2112_GPIO_SPEC_CLK7) != 0)) { 715 /* Special mode means that a pin is not for GPIO. */ 716 } else if ((data.output & mask) != 0) { 717 pin->gp_flags |= GPIO_PIN_OUTPUT; 718 if ((data.pushpull & mask) != 0) 719 pin->gp_flags |= GPIO_PIN_PUSHPULL; 720 else 721 pin->gp_flags |= GPIO_PIN_OPENDRAIN; 722 } else { 723 pin->gp_flags |= GPIO_PIN_INPUT; 724 } 725 } 726 727 sc->busdev = gpiobus_attach_bus(dev); 728 if (sc->busdev == NULL) { 729 device_printf(dev, "gpiobus_attach_bus failed\n"); 730 goto detach; 731 } 732 return (0); 733 734 detach: 735 cp2112gpio_detach(dev); 736 return (ENXIO); 737 } 738 739 static int 740 cp2112gpio_detach(device_t dev) 741 { 742 struct cp2112gpio_softc *sc; 743 744 sc = device_get_softc(dev); 745 if (sc->busdev != NULL) 746 gpiobus_detach_bus(dev); 747 sx_destroy(&sc->gpio_lock); 748 return (0); 749 } 750 751 static void 752 cp2112iic_intr_write_callback(struct usb_xfer *xfer, usb_error_t error) 753 { 754 struct cp2112iic_softc *sc; 755 struct usb_page_cache *pc; 756 757 sc = usbd_xfer_softc(xfer); 758 759 mtx_assert(&sc->io.lock, MA_OWNED); 760 761 switch (USB_GET_STATE(xfer)) { 762 case USB_ST_SETUP: 763 pc = usbd_xfer_get_frame(xfer, 0); 764 usbd_copy_in(pc, 0, sc->io.out.data, sc->io.out.len); 765 usbd_xfer_set_frame_len(xfer, 0, sc->io.out.len); 766 usbd_xfer_set_frames(xfer, 1); 767 usbd_transfer_submit(xfer); 768 break; 769 case USB_ST_TRANSFERRED: 770 sc->io.out.error = 0; 771 sc->io.out.done = 1; 772 cv_signal(&sc->io.cv); 773 break; 774 default: /* Error */ 775 device_printf(sc->dev, "write intr state %d error %d\n", 776 USB_GET_STATE(xfer), error); 777 sc->io.out.error = IIC_EBUSERR; 778 cv_signal(&sc->io.cv); 779 if (error != USB_ERR_CANCELLED) { 780 /* try to clear stall first */ 781 usbd_xfer_set_stall(xfer); 782 } 783 break; 784 } 785 } 786 787 static void 788 cp2112iic_intr_read_callback(struct usb_xfer *xfer, usb_error_t error) 789 { 790 struct cp2112iic_softc *sc = usbd_xfer_softc(xfer); 791 struct usb_page_cache *pc; 792 int act_len, len; 793 794 mtx_assert(&sc->io.lock, MA_OWNED); 795 usbd_xfer_status(xfer, &act_len, NULL, NULL, NULL); 796 797 switch (USB_GET_STATE(xfer)) { 798 case USB_ST_TRANSFERRED: 799 if (sc->io.in.done) { 800 device_printf(sc->dev, 801 "interrupt while previous is pending, ignored\n"); 802 } else if (sc->io.in.len == 0) { 803 uint8_t buf[8]; 804 805 /* 806 * There is a spurious Transfer Status Response and 807 * zero-length Read Response during hardware 808 * configuration. Possibly they carry some information 809 * about the initial bus state. 810 */ 811 if (device_is_attached(sc->dev)) { 812 device_printf(sc->dev, 813 "unsolicited interrupt, ignored\n"); 814 if (bootverbose) { 815 pc = usbd_xfer_get_frame(xfer, 0); 816 len = MIN(sizeof(buf), act_len); 817 usbd_copy_out(pc, 0, buf, len); 818 device_printf(sc->dev, "data: %*D\n", 819 len, buf, " "); 820 } 821 } else { 822 pc = usbd_xfer_get_frame(xfer, 0); 823 len = MIN(sizeof(buf), act_len); 824 usbd_copy_out(pc, 0, buf, len); 825 if (buf[0] == CP2112_REQ_SMB_XFER_STATUS_RESP) { 826 device_printf(sc->dev, 827 "initial bus status0 = 0x%02x, " 828 "status1 = 0x%02x\n", 829 buf[1], buf[2]); 830 } 831 } 832 } else if (act_len == CP2112_REPORT_SIZE) { 833 pc = usbd_xfer_get_frame(xfer, 0); 834 usbd_copy_out(pc, 0, sc->io.in.data, sc->io.in.len); 835 sc->io.in.error = 0; 836 sc->io.in.done = 1; 837 } else { 838 device_printf(sc->dev, 839 "unexpected input report length %u\n", act_len); 840 sc->io.in.error = IIC_EBUSERR; 841 sc->io.in.done = 1; 842 } 843 cv_signal(&sc->io.cv); 844 case USB_ST_SETUP: 845 tr_setup: 846 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 847 usbd_transfer_submit(xfer); 848 break; 849 850 default: /* Error */ 851 device_printf(sc->dev, "read intr state %d error %d\n", 852 USB_GET_STATE(xfer), error); 853 854 sc->io.in.error = IIC_EBUSERR; 855 sc->io.in.done = 1; 856 cv_signal(&sc->io.cv); 857 if (error != USB_ERR_CANCELLED) { 858 /* try to clear stall first */ 859 usbd_xfer_set_stall(xfer); 860 goto tr_setup; 861 } 862 break; 863 } 864 } 865 866 static const struct usb_config cp2112iic_config[CP2112_N_TRANSFER] = { 867 [CP2112_INTR_OUT] = { 868 .type = UE_INTERRUPT, 869 .endpoint = UE_ADDR_ANY, 870 .direction = UE_DIR_OUT, 871 .flags = { .pipe_bof = 1, .no_pipe_ok = 1, }, 872 .bufsize = 0, /* use wMaxPacketSize */ 873 .callback = &cp2112iic_intr_write_callback, 874 }, 875 [CP2112_INTR_IN] = { 876 .type = UE_INTERRUPT, 877 .endpoint = UE_ADDR_ANY, 878 .direction = UE_DIR_IN, 879 .flags = { .pipe_bof = 1, .short_xfer_ok = 1, }, 880 .bufsize = 0, /* use wMaxPacketSize */ 881 .callback = &cp2112iic_intr_read_callback, 882 }, 883 }; 884 885 static int 886 cp2112iic_send_req(struct cp2112iic_softc *sc, const void *data, 887 uint16_t len) 888 { 889 int err; 890 891 mtx_assert(&sc->io.lock, MA_OWNED); 892 KASSERT(sc->io.out.done == 0, ("%s: conflicting request", __func__)); 893 894 sc->io.out.data = data; 895 sc->io.out.len = len; 896 897 DTRACE_PROBE1(send__req, uint8_t, *(const uint8_t *)data); 898 899 usbd_transfer_start(sc->xfers[CP2112_INTR_OUT]); 900 901 while (!sc->io.out.done) 902 cv_wait(&sc->io.cv, &sc->io.lock); 903 904 usbd_transfer_stop(sc->xfers[CP2112_INTR_OUT]); 905 906 sc->io.out.done = 0; 907 sc->io.out.data = NULL; 908 sc->io.out.len = 0; 909 err = sc->io.out.error; 910 if (err != 0) { 911 device_printf(sc->dev, "output report 0x%02x failed: %d\n", 912 *(const uint8_t*)data, err); 913 } 914 return (err); 915 } 916 917 static int 918 cp2112iic_req_resp(struct cp2112iic_softc *sc, const void *req_data, 919 uint16_t req_len, void *resp_data, uint16_t resp_len) 920 { 921 int err; 922 923 mtx_assert(&sc->io.lock, MA_OWNED); 924 925 /* 926 * Prepare to receive a response interrupt even before the 927 * request transfer is confirmed (USB_ST_TRANSFERED). 928 */ 929 KASSERT(sc->io.in.done == 0, ("%s: conflicting request", __func__)); 930 sc->io.in.len = resp_len; 931 sc->io.in.data = resp_data; 932 933 err = cp2112iic_send_req(sc, req_data, req_len); 934 if (err != 0) { 935 sc->io.in.len = 0; 936 sc->io.in.data = NULL; 937 return (err); 938 } 939 940 while (!sc->io.in.done) 941 cv_wait(&sc->io.cv, &sc->io.lock); 942 943 err = sc->io.in.error; 944 sc->io.in.done = 0; 945 sc->io.in.error = 0; 946 sc->io.in.len = 0; 947 sc->io.in.data = NULL; 948 return (err); 949 } 950 951 static int 952 cp2112iic_check_req_status(struct cp2112iic_softc *sc) 953 { 954 struct i2c_xfer_status_req xfer_status_req; 955 struct i2c_xfer_status_resp xfer_status_resp; 956 int err; 957 958 mtx_assert(&sc->io.lock, MA_OWNED); 959 960 do { 961 xfer_status_req.id = CP2112_REQ_SMB_XFER_STATUS_REQ; 962 xfer_status_req.request = 1; 963 err = cp2112iic_req_resp(sc, 964 &xfer_status_req, sizeof(xfer_status_req), 965 &xfer_status_resp, sizeof(xfer_status_resp)); 966 967 if (xfer_status_resp.id != CP2112_REQ_SMB_XFER_STATUS_RESP) { 968 device_printf(sc->dev, 969 "unexpected response 0x%02x to status request\n", 970 xfer_status_resp.id); 971 err = IIC_EBUSERR; 972 goto out; 973 } 974 975 DTRACE_PROBE4(xfer__status, uint8_t, xfer_status_resp.status0, 976 uint8_t, xfer_status_resp.status1, 977 uint16_t, be16toh(xfer_status_resp.status2), 978 uint16_t, be16toh(xfer_status_resp.status3)); 979 980 switch (xfer_status_resp.status0) { 981 case CP2112_IIC_STATUS0_IDLE: 982 err = IIC_ESTATUS; 983 break; 984 case CP2112_IIC_STATUS0_BUSY: 985 err = ERESTART; /* non-I2C, special handling */ 986 break; 987 case CP2112_IIC_STATUS0_CMP: 988 err = IIC_NOERR; 989 break; 990 case CP2112_IIC_STATUS0_ERROR: 991 switch (xfer_status_resp.status1) { 992 case CP2112_IIC_STATUS1_TIMEOUT_NACK: 993 err = IIC_ENOACK; 994 break; 995 case CP2112_IIC_STATUS1_TIMEOUT_BUS: 996 err = IIC_ETIMEOUT; 997 break; 998 case CP2112_IIC_STATUS1_ARB_LOST: 999 err = IIC_EBUSBSY; 1000 break; 1001 default: 1002 device_printf(sc->dev, 1003 "i2c error, status = 0x%02x\n", 1004 xfer_status_resp.status1); 1005 err = IIC_ESTATUS; 1006 break; 1007 } 1008 break; 1009 default: 1010 device_printf(sc->dev, 1011 "unknown i2c xfer status0 0x%02x\n", 1012 xfer_status_resp.status0); 1013 err = IIC_EBUSERR; 1014 break; 1015 } 1016 1017 } while (err == ERESTART); 1018 out: 1019 return (err); 1020 } 1021 1022 static int 1023 cp2112iic_read_data(struct cp2112iic_softc *sc, void *data, uint16_t in_len, 1024 uint16_t *out_len) 1025 { 1026 struct i2c_data_read_force_send_req data_read_force_send; 1027 struct i2c_data_read_resp data_read_resp; 1028 int err; 1029 1030 mtx_assert(&sc->io.lock, MA_OWNED); 1031 1032 /* 1033 * Prepare to receive a response interrupt even before the request 1034 * transfer is confirmed (USB_ST_TRANSFERED). 1035 */ 1036 1037 if (in_len > sizeof(data_read_resp.data)) 1038 in_len = sizeof(data_read_resp.data); 1039 data_read_force_send.id = CP2112_REQ_SMB_READ_FORCE_SEND; 1040 data_read_force_send.len = htobe16(in_len); 1041 err = cp2112iic_req_resp(sc, 1042 &data_read_force_send, sizeof(data_read_force_send), 1043 &data_read_resp, sizeof(data_read_resp)); 1044 if (err != 0) 1045 goto out; 1046 1047 if (data_read_resp.id != CP2112_REQ_SMB_READ_RESPONSE) { 1048 device_printf(sc->dev, 1049 "unexpected response 0x%02x to data read request\n", 1050 data_read_resp.id); 1051 err = IIC_EBUSERR; 1052 goto out; 1053 } 1054 1055 DTRACE_PROBE2(read__response, uint8_t, data_read_resp.status, 1056 uint8_t, data_read_resp.len); 1057 1058 /* 1059 * We expect either the request completed status or, more typical for 1060 * this driver, the bus idle status because of the preceding 1061 * Force Read Status command (which is not an I2C request). 1062 */ 1063 if (data_read_resp.status != CP2112_IIC_STATUS0_CMP && 1064 data_read_resp.status != CP2112_IIC_STATUS0_IDLE) { 1065 err = IIC_EBUSERR; 1066 goto out; 1067 } 1068 if (data_read_resp.len > in_len) { 1069 device_printf(sc->dev, "device returns more data than asked\n"); 1070 err = IIC_EOVERFLOW; 1071 goto out; 1072 } 1073 1074 *out_len = data_read_resp.len; 1075 if (*out_len > 0) 1076 memcpy(data, data_read_resp.data, *out_len); 1077 out: 1078 return (err); 1079 } 1080 1081 static int 1082 cp2112iic_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs) 1083 { 1084 struct cp2112iic_softc *sc = device_get_softc(dev); 1085 struct cp2112_softc *psc = device_get_softc(device_get_parent(dev)); 1086 const char *reason = NULL; 1087 uint32_t i; 1088 uint16_t read_off, to_read; 1089 int err; 1090 1091 /* 1092 * The hardware interface imposes limits on allowed I2C messages. 1093 * It is not possible to explicitly send a start or stop. 1094 * It is not possible to do a zero length transfer. 1095 * For this reason it's impossible to send a message with no data 1096 * at all (like an SMBus quick message). 1097 * Each read or write transfer beginning with the start condition 1098 * and ends with the stop condition. The only exception is that 1099 * it is possible to have a write transfer followed by a read 1100 * transfer to the same slave with the repeated start condition 1101 * between them. 1102 */ 1103 for (i = 0; i < nmsgs; i++) { 1104 if (i == 0 && (msgs[i].flags & IIC_M_NOSTART) != 0) { 1105 reason = "first message without start"; 1106 break; 1107 } 1108 if (i == nmsgs - 1 && (msgs[i].flags & IIC_M_NOSTOP) != 0) { 1109 reason = "last message without stop"; 1110 break; 1111 } 1112 if (msgs[i].len == 0) { 1113 reason = "message with no data"; 1114 break; 1115 } 1116 if ((msgs[i].flags & IIC_M_RD) != 0 && 1117 msgs[i].len > CP2112_IIC_MAX_READ_LEN) { 1118 reason = "too long read"; 1119 break; 1120 } 1121 if ((msgs[i].flags & IIC_M_RD) == 0 && 1122 msgs[i].len > SIZEOF_FIELD(i2c_write_req, data)) { 1123 reason = "too long write"; 1124 break; 1125 } 1126 if ((msgs[i].flags & IIC_M_NOSTART) != 0) { 1127 reason = "message without start or repeated start"; 1128 break; 1129 } 1130 if ((msgs[i].flags & IIC_M_NOSTOP) != 0 && 1131 (msgs[i].flags & IIC_M_RD) != 0) { 1132 reason = "read without stop"; 1133 break; 1134 } 1135 if ((msgs[i].flags & IIC_M_NOSTOP) != 0 && 1136 psc->sc_version < CP2112_IIC_REPSTART_VER) { 1137 reason = "write without stop"; 1138 break; 1139 } 1140 if ((msgs[i].flags & IIC_M_NOSTOP) != 0 && 1141 msgs[i].len > SIZEOF_FIELD(i2c_write_read_req, wdata)) { 1142 reason = "too long write without stop"; 1143 break; 1144 } 1145 if (i > 0) { 1146 if ((msgs[i - 1].flags & IIC_M_NOSTOP) != 0 && 1147 msgs[i].slave != msgs[i - 1].slave) { 1148 reason = "change of slave without stop"; 1149 break; 1150 } 1151 if ((msgs[i - 1].flags & IIC_M_NOSTOP) != 0 && 1152 (msgs[i].flags & IIC_M_RD) == 0) { 1153 reason = "write after repeated start"; 1154 break; 1155 } 1156 } 1157 } 1158 if (reason != NULL) { 1159 if (bootverbose) 1160 device_printf(dev, "unsupported i2c message: %s\n", 1161 reason); 1162 return (IIC_ENOTSUPP); 1163 } 1164 1165 mtx_lock(&sc->io.lock); 1166 1167 for (i = 0; i < nmsgs; i++) { 1168 if (i + 1 < nmsgs && (msgs[i].flags & IIC_M_NOSTOP) != 0) { 1169 /* 1170 * Combine <write><repeated start><read> into a single 1171 * CP2112 operation. 1172 */ 1173 struct i2c_write_read_req req; 1174 1175 KASSERT((msgs[i].flags & IIC_M_RD) == 0, 1176 ("read without stop")); 1177 KASSERT((msgs[i + 1].flags & IIC_M_RD) != 0, 1178 ("write after write without stop")); 1179 req.id = CP2112_REQ_SMB_WRITE_READ; 1180 req.slave = msgs[i].slave & ~LSB; 1181 to_read = msgs[i + 1].len; 1182 req.rlen = htobe16(to_read); 1183 req.wlen = msgs[i].len; 1184 memcpy(req.wdata, msgs[i].buf, msgs[i].len); 1185 err = cp2112iic_send_req(sc, &req, msgs[i].len + 5); 1186 1187 /* 1188 * The next message is already handled. 1189 * Also needed for read data to go into the right msg. 1190 */ 1191 i++; 1192 } else if ((msgs[i].flags & IIC_M_RD) != 0) { 1193 struct i2c_read_req req; 1194 1195 req.id = CP2112_REQ_SMB_READ; 1196 req.slave = msgs[i].slave & ~LSB; 1197 to_read = msgs[i].len; 1198 req.len = htobe16(to_read); 1199 err = cp2112iic_send_req(sc, &req, sizeof(req)); 1200 } else { 1201 struct i2c_write_req req; 1202 1203 req.id = CP2112_REQ_SMB_WRITE; 1204 req.slave = msgs[i].slave & ~LSB; 1205 req.len = msgs[i].len; 1206 memcpy(req.data, msgs[i].buf, msgs[i].len); 1207 to_read = 0; 1208 err = cp2112iic_send_req(sc, &req, msgs[i].len + 3); 1209 } 1210 if (err != 0) 1211 break; 1212 1213 err = cp2112iic_check_req_status(sc); 1214 if (err != 0) 1215 break; 1216 1217 read_off = 0; 1218 while (to_read > 0) { 1219 uint16_t act_read; 1220 1221 err = cp2112iic_read_data(sc, msgs[i].buf + read_off, 1222 to_read, &act_read); 1223 if (err != 0) 1224 break; 1225 KASSERT(act_read <= to_read, ("cp2112iic_read_data " 1226 "returned more data than asked")); 1227 read_off += act_read; 1228 to_read -= act_read; 1229 } 1230 if (err != 0) 1231 break; 1232 } 1233 1234 mtx_unlock(&sc->io.lock); 1235 return (err); 1236 } 1237 1238 static int 1239 cp2112iic_reset(device_t dev, u_char speed, u_char addr, u_char *oldaddr) 1240 { 1241 struct i2c_cfg_req i2c_cfg; 1242 struct cp2112iic_softc *sc; 1243 device_t cp2112; 1244 u_int busfreq; 1245 int err; 1246 1247 sc = device_get_softc(dev); 1248 cp2112 = device_get_parent(dev); 1249 if (sc->iicbus_dev == NULL) 1250 busfreq = 100000; 1251 else 1252 busfreq = IICBUS_GET_FREQUENCY(sc->iicbus_dev, speed); 1253 1254 err = cp2112_get_report(cp2112, CP2112_REQ_SMB_CFG, 1255 &i2c_cfg, sizeof(i2c_cfg)); 1256 if (err != 0) { 1257 device_printf(dev, "failed to get CP2112_REQ_SMB_CFG report\n"); 1258 return (err); 1259 } 1260 1261 if (oldaddr != NULL) 1262 *oldaddr = i2c_cfg.slave_addr; 1263 /* 1264 * For simplicity we do not enable Auto Send Read 1265 * because of erratum CP2112_E101 (fixed in version 3). 1266 * 1267 * TODO: set I2C parameters based on configuration preferences: 1268 * - read and write timeouts (no timeout by default), 1269 * - SCL low timeout (disabled by default), 1270 * etc. 1271 * 1272 * TODO: should the device reset request (0x01) be sent? 1273 * If the device disconnects as a result, then no. 1274 */ 1275 i2c_cfg.speed = htobe32(busfreq); 1276 if (addr != 0) 1277 i2c_cfg.slave_addr = addr; 1278 i2c_cfg.auto_send_read = 0; 1279 i2c_cfg.retry_count = htobe16(1); 1280 i2c_cfg.scl_low_timeout = 0; 1281 if (bootverbose) { 1282 device_printf(dev, "speed %d Hz\n", be32toh(i2c_cfg.speed)); 1283 device_printf(dev, "slave addr 0x%02x\n", i2c_cfg.slave_addr); 1284 device_printf(dev, "auto send read %s\n", 1285 i2c_cfg.auto_send_read ? "on" : "off"); 1286 device_printf(dev, "write timeout %d ms (0 - disabled)\n", 1287 be16toh(i2c_cfg.write_timeout)); 1288 device_printf(dev, "read timeout %d ms (0 - disabled)\n", 1289 be16toh(i2c_cfg.read_timeout)); 1290 device_printf(dev, "scl low timeout %s\n", 1291 i2c_cfg.scl_low_timeout ? "on" : "off"); 1292 device_printf(dev, "retry count %d (0 - no limit)\n", 1293 be16toh(i2c_cfg.retry_count)); 1294 } 1295 err = cp2112_set_report(cp2112, CP2112_REQ_SMB_CFG, 1296 &i2c_cfg, sizeof(i2c_cfg)); 1297 if (err != 0) { 1298 device_printf(dev, "failed to set CP2112_REQ_SMB_CFG report\n"); 1299 return (err); 1300 } 1301 return (0); 1302 } 1303 1304 static int 1305 cp2112iic_probe(device_t dev) 1306 { 1307 device_set_desc(dev, "CP2112 I2C interface"); 1308 return (BUS_PROBE_SPECIFIC); 1309 } 1310 1311 static int 1312 cp2112iic_attach(device_t dev) 1313 { 1314 struct cp2112iic_softc *sc; 1315 struct cp2112_softc *psc; 1316 device_t cp2112; 1317 int err; 1318 1319 sc = device_get_softc(dev); 1320 sc->dev = dev; 1321 cp2112 = device_get_parent(dev); 1322 psc = device_get_softc(cp2112); 1323 1324 mtx_init(&sc->io.lock, "cp2112iic lock", NULL, MTX_DEF | MTX_RECURSE); 1325 cv_init(&sc->io.cv, "cp2112iic cv"); 1326 1327 err = usbd_transfer_setup(psc->sc_udev, 1328 &psc->sc_iface_index, sc->xfers, cp2112iic_config, 1329 nitems(cp2112iic_config), sc, &sc->io.lock); 1330 if (err != 0) { 1331 device_printf(dev, "usbd_transfer_setup failed %d\n", err); 1332 goto detach; 1333 } 1334 1335 /* Prepare to receive interrupts. */ 1336 mtx_lock(&sc->io.lock); 1337 usbd_transfer_start(sc->xfers[CP2112_INTR_IN]); 1338 mtx_unlock(&sc->io.lock); 1339 1340 sc->iicbus_dev = device_add_child(dev, "iicbus", -1); 1341 if (sc->iicbus_dev == NULL) { 1342 device_printf(dev, "iicbus creation failed\n"); 1343 err = ENXIO; 1344 goto detach; 1345 } 1346 bus_generic_attach(dev); 1347 return (0); 1348 1349 detach: 1350 cp2112iic_detach(dev); 1351 return (err); 1352 } 1353 1354 static int 1355 cp2112iic_detach(device_t dev) 1356 { 1357 struct cp2112iic_softc *sc; 1358 int err; 1359 1360 sc = device_get_softc(dev); 1361 err = bus_generic_detach(dev); 1362 if (err != 0) 1363 return (err); 1364 device_delete_children(dev); 1365 1366 mtx_lock(&sc->io.lock); 1367 usbd_transfer_stop(sc->xfers[CP2112_INTR_IN]); 1368 mtx_unlock(&sc->io.lock); 1369 usbd_transfer_unsetup(sc->xfers, nitems(cp2112iic_config)); 1370 1371 cv_destroy(&sc->io.cv); 1372 mtx_destroy(&sc->io.lock); 1373 1374 return (0); 1375 } 1376 1377 static device_method_t cp2112hid_methods[] = { 1378 DEVMETHOD(device_probe, cp2112_probe), 1379 DEVMETHOD(device_attach, cp2112_attach), 1380 DEVMETHOD(device_detach, cp2112_detach), 1381 1382 DEVMETHOD_END 1383 }; 1384 1385 static driver_t cp2112hid_driver = { 1386 .name = "cp2112hid", 1387 .methods = cp2112hid_methods, 1388 .size = sizeof(struct cp2112_softc), 1389 }; 1390 1391 DRIVER_MODULE(cp2112hid, uhub, cp2112hid_driver, NULL, NULL); 1392 MODULE_DEPEND(cp2112hid, usb, 1, 1, 1); 1393 MODULE_VERSION(cp2112hid, 1); 1394 USB_PNP_HOST_INFO(cp2112_devs); 1395 1396 static device_method_t cp2112gpio_methods[] = { 1397 /* Device */ 1398 DEVMETHOD(device_probe, cp2112gpio_probe), 1399 DEVMETHOD(device_attach, cp2112gpio_attach), 1400 DEVMETHOD(device_detach, cp2112gpio_detach), 1401 1402 /* GPIO */ 1403 DEVMETHOD(gpio_get_bus, cp2112_gpio_get_bus), 1404 DEVMETHOD(gpio_pin_max, cp2112_gpio_pin_max), 1405 DEVMETHOD(gpio_pin_get, cp2112_gpio_pin_get), 1406 DEVMETHOD(gpio_pin_set, cp2112_gpio_pin_set), 1407 DEVMETHOD(gpio_pin_toggle, cp2112_gpio_pin_toggle), 1408 DEVMETHOD(gpio_pin_getname, cp2112_gpio_pin_getname), 1409 DEVMETHOD(gpio_pin_getcaps, cp2112_gpio_pin_getcaps), 1410 DEVMETHOD(gpio_pin_getflags, cp2112_gpio_pin_getflags), 1411 DEVMETHOD(gpio_pin_setflags, cp2112_gpio_pin_setflags), 1412 1413 DEVMETHOD_END 1414 }; 1415 1416 static driver_t cp2112gpio_driver = { 1417 .name = "gpio", 1418 .methods = cp2112gpio_methods, 1419 .size = sizeof(struct cp2112gpio_softc), 1420 }; 1421 1422 DRIVER_MODULE(cp2112gpio, cp2112hid, cp2112gpio_driver, NULL, NULL); 1423 MODULE_DEPEND(cp2112gpio, cp2112hid, 1, 1, 1); 1424 MODULE_DEPEND(cp2112gpio, gpiobus, 1, 1, 1); 1425 MODULE_VERSION(cp2112gpio, 1); 1426 1427 static device_method_t cp2112iic_methods[] = { 1428 /* Device interface */ 1429 DEVMETHOD(device_probe, cp2112iic_probe), 1430 DEVMETHOD(device_attach, cp2112iic_attach), 1431 DEVMETHOD(device_detach, cp2112iic_detach), 1432 1433 /* I2C methods */ 1434 DEVMETHOD(iicbus_transfer, cp2112iic_transfer), 1435 DEVMETHOD(iicbus_reset, cp2112iic_reset), 1436 DEVMETHOD(iicbus_callback, iicbus_null_callback), 1437 1438 DEVMETHOD_END 1439 }; 1440 1441 static driver_t cp2112iic_driver = { 1442 "iichb", 1443 cp2112iic_methods, 1444 sizeof(struct cp2112iic_softc) 1445 }; 1446 1447 DRIVER_MODULE(cp2112iic, cp2112hid, cp2112iic_driver, NULL, NULL); 1448 MODULE_DEPEND(cp2112iic, cp2112hid, 1, 1, 1); 1449 MODULE_DEPEND(cp2112iic, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER); 1450 MODULE_VERSION(cp2112iic, 1);
Cache object: 7da6df695eb52ab81e4dcf24a1db0e4a
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