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