1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003 Scott Long
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30 /*
31 * Driver for the MCT (Magic Control Technology) USB-RS232 Converter.
32 * Based on the superb documentation from the linux mct_u232 driver by
33 * Wolfgang Grandeggar <wolfgang@cec.ch>.
34 * This device smells a lot like the Belkin F5U103, except that it has
35 * suffered some mild brain-damage. This driver is based off of the ubsa.c
36 * driver from Alexander Kabaev <kan@FreeBSD.org>. Merging the two together
37 * might be useful, though the subtle differences might lead to lots of
38 * #ifdef's.
39 */
40
41 /*
42 * NOTE: all function names beginning like "umct_cfg_" can only
43 * be called from within the config thread function !
44 */
45
46 #include <sys/stdint.h>
47 #include <sys/stddef.h>
48 #include <sys/param.h>
49 #include <sys/queue.h>
50 #include <sys/types.h>
51 #include <sys/systm.h>
52 #include <sys/kernel.h>
53 #include <sys/bus.h>
54 #include <sys/module.h>
55 #include <sys/lock.h>
56 #include <sys/mutex.h>
57 #include <sys/condvar.h>
58 #include <sys/sysctl.h>
59 #include <sys/sx.h>
60 #include <sys/unistd.h>
61 #include <sys/callout.h>
62 #include <sys/malloc.h>
63 #include <sys/priv.h>
64
65 #include <dev/usb/usb.h>
66 #include <dev/usb/usbdi.h>
67 #include <dev/usb/usbdi_util.h>
68 #include "usbdevs.h"
69
70 #define USB_DEBUG_VAR usb_debug
71 #include <dev/usb/usb_debug.h>
72 #include <dev/usb/usb_process.h>
73
74 #include <dev/usb/serial/usb_serial.h>
75
76 /* The UMCT advertises the standard 8250 UART registers */
77 #define UMCT_GET_MSR 2 /* Get Modem Status Register */
78 #define UMCT_GET_MSR_SIZE 1
79 #define UMCT_GET_LCR 6 /* Get Line Control Register */
80 #define UMCT_GET_LCR_SIZE 1
81 #define UMCT_SET_BAUD 5 /* Set the Baud Rate Divisor */
82 #define UMCT_SET_BAUD_SIZE 4
83 #define UMCT_SET_LCR 7 /* Set Line Control Register */
84 #define UMCT_SET_LCR_SIZE 1
85 #define UMCT_SET_MCR 10 /* Set Modem Control Register */
86 #define UMCT_SET_MCR_SIZE 1
87
88 #define UMCT_MSR_CTS_CHG 0x01
89 #define UMCT_MSR_DSR_CHG 0x02
90 #define UMCT_MSR_RI_CHG 0x04
91 #define UMCT_MSR_CD_CHG 0x08
92 #define UMCT_MSR_CTS 0x10
93 #define UMCT_MSR_RTS 0x20
94 #define UMCT_MSR_RI 0x40
95 #define UMCT_MSR_CD 0x80
96
97 #define UMCT_INTR_INTERVAL 100
98 #define UMCT_IFACE_INDEX 0
99 #define UMCT_CONFIG_INDEX 0
100
101 enum {
102 UMCT_BULK_DT_WR,
103 UMCT_BULK_DT_RD,
104 UMCT_INTR_DT_RD,
105 UMCT_N_TRANSFER,
106 };
107
108 struct umct_softc {
109 struct ucom_super_softc sc_super_ucom;
110 struct ucom_softc sc_ucom;
111
112 struct usb_device *sc_udev;
113 struct usb_xfer *sc_xfer[UMCT_N_TRANSFER];
114 struct mtx sc_mtx;
115
116 uint32_t sc_unit;
117
118 uint16_t sc_obufsize;
119
120 uint8_t sc_lsr;
121 uint8_t sc_msr;
122 uint8_t sc_lcr;
123 uint8_t sc_mcr;
124 uint8_t sc_iface_no;
125 uint8_t sc_swap_cb;
126 };
127
128 /* prototypes */
129
130 static device_probe_t umct_probe;
131 static device_attach_t umct_attach;
132 static device_detach_t umct_detach;
133 static void umct_free_softc(struct umct_softc *);
134
135 static usb_callback_t umct_intr_callback;
136 static usb_callback_t umct_intr_callback_sub;
137 static usb_callback_t umct_read_callback;
138 static usb_callback_t umct_read_callback_sub;
139 static usb_callback_t umct_write_callback;
140
141 static void umct_cfg_do_request(struct umct_softc *sc, uint8_t request,
142 uint16_t len, uint32_t value);
143 static void umct_free(struct ucom_softc *);
144 static void umct_cfg_get_status(struct ucom_softc *, uint8_t *,
145 uint8_t *);
146 static void umct_cfg_set_break(struct ucom_softc *, uint8_t);
147 static void umct_cfg_set_dtr(struct ucom_softc *, uint8_t);
148 static void umct_cfg_set_rts(struct ucom_softc *, uint8_t);
149 static uint8_t umct_calc_baud(uint32_t);
150 static int umct_pre_param(struct ucom_softc *, struct termios *);
151 static void umct_cfg_param(struct ucom_softc *, struct termios *);
152 static void umct_start_read(struct ucom_softc *);
153 static void umct_stop_read(struct ucom_softc *);
154 static void umct_start_write(struct ucom_softc *);
155 static void umct_stop_write(struct ucom_softc *);
156 static void umct_poll(struct ucom_softc *ucom);
157
158 static const struct usb_config umct_config[UMCT_N_TRANSFER] = {
159 [UMCT_BULK_DT_WR] = {
160 .type = UE_BULK,
161 .endpoint = UE_ADDR_ANY,
162 .direction = UE_DIR_OUT,
163 .bufsize = 0, /* use wMaxPacketSize */
164 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
165 .callback = &umct_write_callback,
166 },
167
168 [UMCT_BULK_DT_RD] = {
169 .type = UE_INTERRUPT,
170 .endpoint = UE_ADDR_ANY,
171 .direction = UE_DIR_IN,
172 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
173 .bufsize = 0, /* use wMaxPacketSize */
174 .callback = &umct_read_callback,
175 .ep_index = 0, /* first interrupt endpoint */
176 },
177
178 [UMCT_INTR_DT_RD] = {
179 .type = UE_INTERRUPT,
180 .endpoint = UE_ADDR_ANY,
181 .direction = UE_DIR_IN,
182 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
183 .bufsize = 0, /* use wMaxPacketSize */
184 .callback = &umct_intr_callback,
185 .ep_index = 1, /* second interrupt endpoint */
186 },
187 };
188
189 static const struct ucom_callback umct_callback = {
190 .ucom_cfg_get_status = &umct_cfg_get_status,
191 .ucom_cfg_set_dtr = &umct_cfg_set_dtr,
192 .ucom_cfg_set_rts = &umct_cfg_set_rts,
193 .ucom_cfg_set_break = &umct_cfg_set_break,
194 .ucom_cfg_param = &umct_cfg_param,
195 .ucom_pre_param = &umct_pre_param,
196 .ucom_start_read = &umct_start_read,
197 .ucom_stop_read = &umct_stop_read,
198 .ucom_start_write = &umct_start_write,
199 .ucom_stop_write = &umct_stop_write,
200 .ucom_poll = &umct_poll,
201 .ucom_free = &umct_free,
202 };
203
204 static const STRUCT_USB_HOST_ID umct_devs[] = {
205 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_USB232, 0)},
206 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_SITECOM_USB232, 0)},
207 {USB_VPI(USB_VENDOR_MCT, USB_PRODUCT_MCT_DU_H3SP_USB232, 0)},
208 {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U109, 0)},
209 {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U409, 0)},
210 };
211
212 static device_method_t umct_methods[] = {
213 DEVMETHOD(device_probe, umct_probe),
214 DEVMETHOD(device_attach, umct_attach),
215 DEVMETHOD(device_detach, umct_detach),
216 DEVMETHOD_END
217 };
218
219 static driver_t umct_driver = {
220 .name = "umct",
221 .methods = umct_methods,
222 .size = sizeof(struct umct_softc),
223 };
224
225 DRIVER_MODULE(umct, uhub, umct_driver, NULL, NULL);
226 MODULE_DEPEND(umct, ucom, 1, 1, 1);
227 MODULE_DEPEND(umct, usb, 1, 1, 1);
228 MODULE_VERSION(umct, 1);
229 USB_PNP_HOST_INFO(umct_devs);
230
231 static int
umct_probe(device_t dev)232 umct_probe(device_t dev)
233 {
234 struct usb_attach_arg *uaa = device_get_ivars(dev);
235
236 if (uaa->usb_mode != USB_MODE_HOST) {
237 return (ENXIO);
238 }
239 if (uaa->info.bConfigIndex != UMCT_CONFIG_INDEX) {
240 return (ENXIO);
241 }
242 if (uaa->info.bIfaceIndex != UMCT_IFACE_INDEX) {
243 return (ENXIO);
244 }
245 return (usbd_lookup_id_by_uaa(umct_devs, sizeof(umct_devs), uaa));
246 }
247
248 static int
umct_attach(device_t dev)249 umct_attach(device_t dev)
250 {
251 struct usb_attach_arg *uaa = device_get_ivars(dev);
252 struct umct_softc *sc = device_get_softc(dev);
253 int32_t error;
254 uint16_t maxp;
255 uint8_t iface_index;
256
257 sc->sc_udev = uaa->device;
258 sc->sc_unit = device_get_unit(dev);
259
260 device_set_usb_desc(dev);
261 mtx_init(&sc->sc_mtx, "umct", NULL, MTX_DEF);
262 ucom_ref(&sc->sc_super_ucom);
263
264 sc->sc_iface_no = uaa->info.bIfaceNum;
265
266 iface_index = UMCT_IFACE_INDEX;
267 error = usbd_transfer_setup(uaa->device, &iface_index,
268 sc->sc_xfer, umct_config, UMCT_N_TRANSFER, sc, &sc->sc_mtx);
269
270 if (error) {
271 device_printf(dev, "allocating USB "
272 "transfers failed\n");
273 goto detach;
274 }
275
276 /*
277 * The real bulk-in endpoint is also marked as an interrupt.
278 * The only way to differentiate it from the real interrupt
279 * endpoint is to look at the wMaxPacketSize field.
280 */
281 maxp = usbd_xfer_max_framelen(sc->sc_xfer[UMCT_BULK_DT_RD]);
282 if (maxp == 0x2) {
283 /* guessed wrong - switch around endpoints */
284
285 struct usb_xfer *temp = sc->sc_xfer[UMCT_INTR_DT_RD];
286
287 sc->sc_xfer[UMCT_INTR_DT_RD] = sc->sc_xfer[UMCT_BULK_DT_RD];
288 sc->sc_xfer[UMCT_BULK_DT_RD] = temp;
289 sc->sc_swap_cb = 1;
290 }
291
292 sc->sc_obufsize = usbd_xfer_max_len(sc->sc_xfer[UMCT_BULK_DT_WR]);
293
294 if (uaa->info.idProduct == USB_PRODUCT_MCT_SITECOM_USB232) {
295 if (sc->sc_obufsize > 16) {
296 sc->sc_obufsize = 16;
297 }
298 }
299 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
300 &umct_callback, &sc->sc_mtx);
301 if (error) {
302 goto detach;
303 }
304 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
305
306 return (0); /* success */
307
308 detach:
309 umct_detach(dev);
310 return (ENXIO); /* failure */
311 }
312
313 static int
umct_detach(device_t dev)314 umct_detach(device_t dev)
315 {
316 struct umct_softc *sc = device_get_softc(dev);
317
318 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
319 usbd_transfer_unsetup(sc->sc_xfer, UMCT_N_TRANSFER);
320
321 device_claim_softc(dev);
322
323 umct_free_softc(sc);
324
325 return (0);
326 }
327
328 UCOM_UNLOAD_DRAIN(umct);
329
330 static void
umct_free_softc(struct umct_softc * sc)331 umct_free_softc(struct umct_softc *sc)
332 {
333 if (ucom_unref(&sc->sc_super_ucom)) {
334 mtx_destroy(&sc->sc_mtx);
335 device_free_softc(sc);
336 }
337 }
338
339 static void
umct_free(struct ucom_softc * ucom)340 umct_free(struct ucom_softc *ucom)
341 {
342 umct_free_softc(ucom->sc_parent);
343 }
344
345 static void
umct_cfg_do_request(struct umct_softc * sc,uint8_t request,uint16_t len,uint32_t value)346 umct_cfg_do_request(struct umct_softc *sc, uint8_t request,
347 uint16_t len, uint32_t value)
348 {
349 struct usb_device_request req;
350 usb_error_t err;
351 uint8_t temp[4];
352
353 if (len > 4)
354 len = 4;
355 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
356 req.bRequest = request;
357 USETW(req.wValue, 0);
358 req.wIndex[0] = sc->sc_iface_no;
359 req.wIndex[1] = 0;
360 USETW(req.wLength, len);
361 USETDW(temp, value);
362
363 err = ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
364 &req, temp, 0, 1000);
365 if (err) {
366 DPRINTFN(0, "device request failed, err=%s "
367 "(ignored)\n", usbd_errstr(err));
368 }
369 return;
370 }
371
372 static void
umct_intr_callback_sub(struct usb_xfer * xfer,usb_error_t error)373 umct_intr_callback_sub(struct usb_xfer *xfer, usb_error_t error)
374 {
375 struct umct_softc *sc = usbd_xfer_softc(xfer);
376 struct usb_page_cache *pc;
377 uint8_t buf[2];
378 int actlen;
379
380 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
381
382 switch (USB_GET_STATE(xfer)) {
383 case USB_ST_TRANSFERRED:
384 if (actlen < 2) {
385 DPRINTF("too short message\n");
386 goto tr_setup;
387 }
388 pc = usbd_xfer_get_frame(xfer, 0);
389 usbd_copy_out(pc, 0, buf, sizeof(buf));
390
391 /*
392 * MSR bits need translation from ns16550 to SER_* values.
393 * LSR bits are ns16550 in hardware and ucom.
394 */
395 sc->sc_msr = 0;
396 if (buf[0] & UMCT_MSR_CTS)
397 sc->sc_msr |= SER_CTS;
398 if (buf[0] & UMCT_MSR_CD)
399 sc->sc_msr |= SER_DCD;
400 if (buf[0] & UMCT_MSR_RI)
401 sc->sc_msr |= SER_RI;
402 if (buf[0] & UMCT_MSR_RTS)
403 sc->sc_msr |= SER_DSR;
404 sc->sc_lsr = buf[1];
405
406 ucom_status_change(&sc->sc_ucom);
407 /* FALLTHROUGH */
408 case USB_ST_SETUP:
409 tr_setup:
410 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
411 usbd_transfer_submit(xfer);
412 return;
413
414 default: /* Error */
415 if (error != USB_ERR_CANCELLED) {
416 /* try to clear stall first */
417 usbd_xfer_set_stall(xfer);
418 goto tr_setup;
419 }
420 return;
421 }
422 }
423
424 static void
umct_cfg_get_status(struct ucom_softc * ucom,uint8_t * lsr,uint8_t * msr)425 umct_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr)
426 {
427 struct umct_softc *sc = ucom->sc_parent;
428
429 *lsr = sc->sc_lsr;
430 *msr = sc->sc_msr;
431 }
432
433 static void
umct_cfg_set_break(struct ucom_softc * ucom,uint8_t onoff)434 umct_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
435 {
436 struct umct_softc *sc = ucom->sc_parent;
437
438 if (onoff)
439 sc->sc_lcr |= 0x40;
440 else
441 sc->sc_lcr &= ~0x40;
442
443 umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, sc->sc_lcr);
444 }
445
446 static void
umct_cfg_set_dtr(struct ucom_softc * ucom,uint8_t onoff)447 umct_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
448 {
449 struct umct_softc *sc = ucom->sc_parent;
450
451 if (onoff)
452 sc->sc_mcr |= 0x01;
453 else
454 sc->sc_mcr &= ~0x01;
455
456 umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr);
457 }
458
459 static void
umct_cfg_set_rts(struct ucom_softc * ucom,uint8_t onoff)460 umct_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
461 {
462 struct umct_softc *sc = ucom->sc_parent;
463
464 if (onoff)
465 sc->sc_mcr |= 0x02;
466 else
467 sc->sc_mcr &= ~0x02;
468
469 umct_cfg_do_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr);
470 }
471
472 static uint8_t
umct_calc_baud(uint32_t baud)473 umct_calc_baud(uint32_t baud)
474 {
475 switch (baud) {
476 case B300:
477 return (0x1);
478 case B600:
479 return (0x2);
480 case B1200:
481 return (0x3);
482 case B2400:
483 return (0x4);
484 case B4800:
485 return (0x6);
486 case B9600:
487 return (0x8);
488 case B19200:
489 return (0x9);
490 case B38400:
491 return (0xa);
492 case B57600:
493 return (0xb);
494 case 115200:
495 return (0xc);
496 case B0:
497 default:
498 break;
499 }
500 return (0x0);
501 }
502
503 static int
umct_pre_param(struct ucom_softc * ucom,struct termios * t)504 umct_pre_param(struct ucom_softc *ucom, struct termios *t)
505 {
506 return (0); /* we accept anything */
507 }
508
509 static void
umct_cfg_param(struct ucom_softc * ucom,struct termios * t)510 umct_cfg_param(struct ucom_softc *ucom, struct termios *t)
511 {
512 struct umct_softc *sc = ucom->sc_parent;
513 uint32_t value;
514
515 value = umct_calc_baud(t->c_ospeed);
516 umct_cfg_do_request(sc, UMCT_SET_BAUD, UMCT_SET_BAUD_SIZE, value);
517
518 value = (sc->sc_lcr & 0x40);
519
520 switch (t->c_cflag & CSIZE) {
521 case CS5:
522 value |= 0x0;
523 break;
524 case CS6:
525 value |= 0x1;
526 break;
527 case CS7:
528 value |= 0x2;
529 break;
530 default:
531 case CS8:
532 value |= 0x3;
533 break;
534 }
535
536 value |= (t->c_cflag & CSTOPB) ? 0x4 : 0;
537 if (t->c_cflag & PARENB) {
538 value |= 0x8;
539 value |= (t->c_cflag & PARODD) ? 0x0 : 0x10;
540 }
541 /*
542 * XXX There doesn't seem to be a way to tell the device
543 * to use flow control.
544 */
545
546 sc->sc_lcr = value;
547 umct_cfg_do_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, value);
548 }
549
550 static void
umct_start_read(struct ucom_softc * ucom)551 umct_start_read(struct ucom_softc *ucom)
552 {
553 struct umct_softc *sc = ucom->sc_parent;
554
555 /* start interrupt endpoint */
556 usbd_transfer_start(sc->sc_xfer[UMCT_INTR_DT_RD]);
557
558 /* start read endpoint */
559 usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_RD]);
560 }
561
562 static void
umct_stop_read(struct ucom_softc * ucom)563 umct_stop_read(struct ucom_softc *ucom)
564 {
565 struct umct_softc *sc = ucom->sc_parent;
566
567 /* stop interrupt endpoint */
568 usbd_transfer_stop(sc->sc_xfer[UMCT_INTR_DT_RD]);
569
570 /* stop read endpoint */
571 usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_RD]);
572 }
573
574 static void
umct_start_write(struct ucom_softc * ucom)575 umct_start_write(struct ucom_softc *ucom)
576 {
577 struct umct_softc *sc = ucom->sc_parent;
578
579 usbd_transfer_start(sc->sc_xfer[UMCT_BULK_DT_WR]);
580 }
581
582 static void
umct_stop_write(struct ucom_softc * ucom)583 umct_stop_write(struct ucom_softc *ucom)
584 {
585 struct umct_softc *sc = ucom->sc_parent;
586
587 usbd_transfer_stop(sc->sc_xfer[UMCT_BULK_DT_WR]);
588 }
589
590 static void
umct_read_callback(struct usb_xfer * xfer,usb_error_t error)591 umct_read_callback(struct usb_xfer *xfer, usb_error_t error)
592 {
593 struct umct_softc *sc = usbd_xfer_softc(xfer);
594
595 if (sc->sc_swap_cb)
596 umct_intr_callback_sub(xfer, error);
597 else
598 umct_read_callback_sub(xfer, error);
599 }
600
601 static void
umct_intr_callback(struct usb_xfer * xfer,usb_error_t error)602 umct_intr_callback(struct usb_xfer *xfer, usb_error_t error)
603 {
604 struct umct_softc *sc = usbd_xfer_softc(xfer);
605
606 if (sc->sc_swap_cb)
607 umct_read_callback_sub(xfer, error);
608 else
609 umct_intr_callback_sub(xfer, error);
610 }
611
612 static void
umct_write_callback(struct usb_xfer * xfer,usb_error_t error)613 umct_write_callback(struct usb_xfer *xfer, usb_error_t error)
614 {
615 struct umct_softc *sc = usbd_xfer_softc(xfer);
616 struct usb_page_cache *pc;
617 uint32_t actlen;
618
619 switch (USB_GET_STATE(xfer)) {
620 case USB_ST_SETUP:
621 case USB_ST_TRANSFERRED:
622 tr_setup:
623 pc = usbd_xfer_get_frame(xfer, 0);
624 if (ucom_get_data(&sc->sc_ucom, pc, 0,
625 sc->sc_obufsize, &actlen)) {
626 usbd_xfer_set_frame_len(xfer, 0, actlen);
627 usbd_transfer_submit(xfer);
628 }
629 return;
630
631 default: /* Error */
632 if (error != USB_ERR_CANCELLED) {
633 /* try to clear stall first */
634 usbd_xfer_set_stall(xfer);
635 goto tr_setup;
636 }
637 return;
638 }
639 }
640
641 static void
umct_read_callback_sub(struct usb_xfer * xfer,usb_error_t error)642 umct_read_callback_sub(struct usb_xfer *xfer, usb_error_t error)
643 {
644 struct umct_softc *sc = usbd_xfer_softc(xfer);
645 struct usb_page_cache *pc;
646 int actlen;
647
648 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
649
650 switch (USB_GET_STATE(xfer)) {
651 case USB_ST_TRANSFERRED:
652 pc = usbd_xfer_get_frame(xfer, 0);
653 ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
654
655 case USB_ST_SETUP:
656 tr_setup:
657 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
658 usbd_transfer_submit(xfer);
659 return;
660
661 default: /* Error */
662 if (error != USB_ERR_CANCELLED) {
663 /* try to clear stall first */
664 usbd_xfer_set_stall(xfer);
665 goto tr_setup;
666 }
667 return;
668 }
669 }
670
671 static void
umct_poll(struct ucom_softc * ucom)672 umct_poll(struct ucom_softc *ucom)
673 {
674 struct umct_softc *sc = ucom->sc_parent;
675 usbd_transfer_poll(sc->sc_xfer, UMCT_N_TRANSFER);
676 }
677