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1 /*-
2  * Copyright (c) 2002, Alexander Kabaev <kan.FreeBSD.org>.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 /*-
30  * Copyright (c) 2001 The NetBSD Foundation, Inc.
31  * All rights reserved.
32  *
33  * This code is derived from software contributed to The NetBSD Foundation
34  * by Ichiro FUKUHARA (ichiro@ichiro.org).
35  *
36  * Redistribution and use in source and binary forms, with or without
37  * modification, are permitted provided that the following conditions
38  * are met:
39  * 1. Redistributions of source code must retain the above copyright
40  *    notice, this list of conditions and the following disclaimer.
41  * 2. Redistributions in binary form must reproduce the above copyright
42  *    notice, this list of conditions and the following disclaimer in the
43  *    documentation and/or other materials provided with the distribution.
44  *
45  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
46  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
47  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
48  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
49  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
50  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
51  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
52  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
53  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
55  * POSSIBILITY OF SUCH DAMAGE.
56  */
57
58 #include <sys/stdint.h>
59 #include <sys/stddef.h>
60 #include <sys/param.h>
61 #include <sys/queue.h>
62 #include <sys/types.h>
63 #include <sys/systm.h>
64 #include <sys/kernel.h>
65 #include <sys/bus.h>
66 #include <sys/module.h>
67 #include <sys/lock.h>
68 #include <sys/mutex.h>
69 #include <sys/condvar.h>
70 #include <sys/sysctl.h>
71 #include <sys/sx.h>
72 #include <sys/unistd.h>
73 #include <sys/callout.h>
74 #include <sys/malloc.h>
75 #include <sys/priv.h>
76
77 #include <dev/usb/usb.h>
78 #include <dev/usb/usbdi.h>
79 #include <dev/usb/usbdi_util.h>
80 #include "usbdevs.h"
81
82 #define USB_DEBUG_VAR ubsa_debug
83 #include <dev/usb/usb_debug.h>
84 #include <dev/usb/usb_process.h>
85
86 #include <dev/usb/serial/usb_serial.h>
87
88 #ifdef USB_DEBUG
89 static int ubsa_debug = 0;
90
91 static SYSCTL_NODE(_hw_usb, OID_AUTO, ubsa, CTLFLAG_RW, 0, "USB ubsa");
92 SYSCTL_INT(_hw_usb_ubsa, OID_AUTO, debug, CTLFLAG_RW,
93     &ubsa_debug, 0, "ubsa debug level");
94 #endif
95
96 #define UBSA_BSIZE             1024     /* bytes */
97
98 #define UBSA_CONFIG_INDEX       0
99 #define UBSA_IFACE_INDEX        0
100
101 #define UBSA_REG_BAUDRATE       0x00
102 #define UBSA_REG_STOP_BITS      0x01
103 #define UBSA_REG_DATA_BITS      0x02
104 #define UBSA_REG_PARITY         0x03
105 #define UBSA_REG_DTR            0x0A
106 #define UBSA_REG_RTS            0x0B
107 #define UBSA_REG_BREAK          0x0C
108 #define UBSA_REG_FLOW_CTRL      0x10
109
110 #define UBSA_PARITY_NONE        0x00
111 #define UBSA_PARITY_EVEN        0x01
112 #define UBSA_PARITY_ODD         0x02
113 #define UBSA_PARITY_MARK        0x03
114 #define UBSA_PARITY_SPACE       0x04
115
116 #define UBSA_FLOW_NONE          0x0000
117 #define UBSA_FLOW_OCTS          0x0001
118 #define UBSA_FLOW_ODSR          0x0002
119 #define UBSA_FLOW_IDSR          0x0004
120 #define UBSA_FLOW_IDTR          0x0008
121 #define UBSA_FLOW_IRTS          0x0010
122 #define UBSA_FLOW_ORTS          0x0020
123 #define UBSA_FLOW_UNKNOWN       0x0040
124 #define UBSA_FLOW_OXON          0x0080
125 #define UBSA_FLOW_IXON          0x0100
126
127 /* line status register */
128 #define UBSA_LSR_TSRE           0x40    /* Transmitter empty: byte sent */
129 #define UBSA_LSR_TXRDY          0x20    /* Transmitter buffer empty */
130 #define UBSA_LSR_BI             0x10    /* Break detected */
131 #define UBSA_LSR_FE             0x08    /* Framing error: bad stop bit */
132 #define UBSA_LSR_PE             0x04    /* Parity error */
133 #define UBSA_LSR_OE             0x02    /* Overrun, lost incoming byte */
134 #define UBSA_LSR_RXRDY          0x01    /* Byte ready in Receive Buffer */
135 #define UBSA_LSR_RCV_MASK       0x1f    /* Mask for incoming data or error */
136
137 /* modem status register */
138 /* All deltas are from the last read of the MSR. */
139 #define UBSA_MSR_DCD            0x80    /* Current Data Carrier Detect */
140 #define UBSA_MSR_RI             0x40    /* Current Ring Indicator */
141 #define UBSA_MSR_DSR            0x20    /* Current Data Set Ready */
142 #define UBSA_MSR_CTS            0x10    /* Current Clear to Send */
143 #define UBSA_MSR_DDCD           0x08    /* DCD has changed state */
144 #define UBSA_MSR_TERI           0x04    /* RI has toggled low to high */
145 #define UBSA_MSR_DDSR           0x02    /* DSR has changed state */
146 #define UBSA_MSR_DCTS           0x01    /* CTS has changed state */
147
148 enum {
149         UBSA_BULK_DT_WR,
150         UBSA_BULK_DT_RD,
151         UBSA_INTR_DT_RD,
152         UBSA_N_TRANSFER,
153 };
154
155 struct ubsa_softc {
156         struct ucom_super_softc sc_super_ucom;
157         struct ucom_softc sc_ucom;
158
159         struct usb_xfer *sc_xfer[UBSA_N_TRANSFER];
160         struct usb_device *sc_udev;
161         struct mtx sc_mtx;
162
163         uint8_t sc_iface_no;            /* interface number */
164         uint8_t sc_iface_index;         /* interface index */
165         uint8_t sc_lsr;                 /* local status register */
166         uint8_t sc_msr;                 /* UBSA status register */
167 };
168
169 static device_probe_t ubsa_probe;
170 static device_attach_t ubsa_attach;
171 static device_detach_t ubsa_detach;
172 static void ubsa_free_softc(struct ubsa_softc *);
173
174 static usb_callback_t ubsa_write_callback;
175 static usb_callback_t ubsa_read_callback;
176 static usb_callback_t ubsa_intr_callback;
177
178 static void     ubsa_cfg_request(struct ubsa_softc *, uint8_t, uint16_t);
179 static void     ubsa_free(struct ucom_softc *);
180 static void     ubsa_cfg_set_dtr(struct ucom_softc *, uint8_t);
181 static void     ubsa_cfg_set_rts(struct ucom_softc *, uint8_t);
182 static void     ubsa_cfg_set_break(struct ucom_softc *, uint8_t);
183 static int      ubsa_pre_param(struct ucom_softc *, struct termios *);
184 static void     ubsa_cfg_param(struct ucom_softc *, struct termios *);
185 static void     ubsa_start_read(struct ucom_softc *);
186 static void     ubsa_stop_read(struct ucom_softc *);
187 static void     ubsa_start_write(struct ucom_softc *);
188 static void     ubsa_stop_write(struct ucom_softc *);
189 static void     ubsa_cfg_get_status(struct ucom_softc *, uint8_t *,
190                     uint8_t *);
191 static void     ubsa_poll(struct ucom_softc *ucom);
192
193 static const struct usb_config ubsa_config[UBSA_N_TRANSFER] = {
194
195         [UBSA_BULK_DT_WR] = {
196                 .type = UE_BULK,
197                 .endpoint = UE_ADDR_ANY,
198                 .direction = UE_DIR_OUT,
199                 .bufsize = UBSA_BSIZE,  /* bytes */
200                 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
201                 .callback = &ubsa_write_callback,
202         },
203
204         [UBSA_BULK_DT_RD] = {
205                 .type = UE_BULK,
206                 .endpoint = UE_ADDR_ANY,
207                 .direction = UE_DIR_IN,
208                 .bufsize = UBSA_BSIZE,  /* bytes */
209                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
210                 .callback = &ubsa_read_callback,
211         },
212
213         [UBSA_INTR_DT_RD] = {
214                 .type = UE_INTERRUPT,
215                 .endpoint = UE_ADDR_ANY,
216                 .direction = UE_DIR_IN,
217                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
218                 .bufsize = 0,   /* use wMaxPacketSize */
219                 .callback = &ubsa_intr_callback,
220         },
221 };
222
223 static const struct ucom_callback ubsa_callback = {
224         .ucom_cfg_get_status = &ubsa_cfg_get_status,
225         .ucom_cfg_set_dtr = &ubsa_cfg_set_dtr,
226         .ucom_cfg_set_rts = &ubsa_cfg_set_rts,
227         .ucom_cfg_set_break = &ubsa_cfg_set_break,
228         .ucom_cfg_param = &ubsa_cfg_param,
229         .ucom_pre_param = &ubsa_pre_param,
230         .ucom_start_read = &ubsa_start_read,
231         .ucom_stop_read = &ubsa_stop_read,
232         .ucom_start_write = &ubsa_start_write,
233         .ucom_stop_write = &ubsa_stop_write,
234         .ucom_poll = &ubsa_poll,
235         .ucom_free = &ubsa_free,
236 };
237
238 static const STRUCT_USB_HOST_ID ubsa_devs[] = {
239         /* AnyData ADU-500A */
240         {USB_VPI(USB_VENDOR_ANYDATA, USB_PRODUCT_ANYDATA_ADU_500A, 0)},
241         /* AnyData ADU-E100A/H */
242         {USB_VPI(USB_VENDOR_ANYDATA, USB_PRODUCT_ANYDATA_ADU_E100X, 0)},
243         /* Axesstel MV100H */
244         {USB_VPI(USB_VENDOR_AXESSTEL, USB_PRODUCT_AXESSTEL_DATAMODEM, 0)},
245         /* BELKIN F5U103 */
246         {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U103, 0)},
247         /* BELKIN F5U120 */
248         {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U120, 0)},
249         /* GoHubs GO-COM232 */
250         {USB_VPI(USB_VENDOR_ETEK, USB_PRODUCT_ETEK_1COM, 0)},
251         /* GoHubs GO-COM232 */
252         {USB_VPI(USB_VENDOR_GOHUBS, USB_PRODUCT_GOHUBS_GOCOM232, 0)},
253         /* Peracom */
254         {USB_VPI(USB_VENDOR_PERACOM, USB_PRODUCT_PERACOM_SERIAL1, 0)},
255 };
256
257 static device_method_t ubsa_methods[] = {
258         DEVMETHOD(device_probe, ubsa_probe),
259         DEVMETHOD(device_attach, ubsa_attach),
260         DEVMETHOD(device_detach, ubsa_detach),
261         DEVMETHOD_END
262 };
263
264 static devclass_t ubsa_devclass;
265
266 static driver_t ubsa_driver = {
267         .name = "ubsa",
268         .methods = ubsa_methods,
269         .size = sizeof(struct ubsa_softc),
270 };
271
272 DRIVER_MODULE(ubsa, uhub, ubsa_driver, ubsa_devclass, NULL, 0);
273 MODULE_DEPEND(ubsa, ucom, 1, 1, 1);
274 MODULE_DEPEND(ubsa, usb, 1, 1, 1);
275 MODULE_VERSION(ubsa, 1);
276
277 static int
278 ubsa_probe(device_t dev)
279 {
280         struct usb_attach_arg *uaa = device_get_ivars(dev);
281
282         if (uaa->usb_mode != USB_MODE_HOST) {
283                 return (ENXIO);
284         }
285         if (uaa->info.bConfigIndex != UBSA_CONFIG_INDEX) {
286                 return (ENXIO);
287         }
288         if (uaa->info.bIfaceIndex != UBSA_IFACE_INDEX) {
289                 return (ENXIO);
290         }
291         return (usbd_lookup_id_by_uaa(ubsa_devs, sizeof(ubsa_devs), uaa));
292 }
293
294 static int
295 ubsa_attach(device_t dev)
296 {
297         struct usb_attach_arg *uaa = device_get_ivars(dev);
298         struct ubsa_softc *sc = device_get_softc(dev);
299         int error;
300
301         DPRINTF("sc=%p\n", sc);
302
303         device_set_usb_desc(dev);
304         mtx_init(&sc->sc_mtx, "ubsa", NULL, MTX_DEF);
305         ucom_ref(&sc->sc_super_ucom);
306
307         sc->sc_udev = uaa->device;
308         sc->sc_iface_no = uaa->info.bIfaceNum;
309         sc->sc_iface_index = UBSA_IFACE_INDEX;
310
311         error = usbd_transfer_setup(uaa->device, &sc->sc_iface_index,
312             sc->sc_xfer, ubsa_config, UBSA_N_TRANSFER, sc, &sc->sc_mtx);
313
314         if (error) {
315                 DPRINTF("could not allocate all pipes\n");
316                 goto detach;
317         }
318         /* clear stall at first run */
319         mtx_lock(&sc->sc_mtx);
320         usbd_xfer_set_stall(sc->sc_xfer[UBSA_BULK_DT_WR]);
321         usbd_xfer_set_stall(sc->sc_xfer[UBSA_BULK_DT_RD]);
322         mtx_unlock(&sc->sc_mtx);
323
324         error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
325             &ubsa_callback, &sc->sc_mtx);
326         if (error) {
327                 DPRINTF("ucom_attach failed\n");
328                 goto detach;
329         }
330         ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
331
332         return (0);
333
334 detach:
335         ubsa_detach(dev);
336         return (ENXIO);
337 }
338
339 static int
340 ubsa_detach(device_t dev)
341 {
342         struct ubsa_softc *sc = device_get_softc(dev);
343
344         DPRINTF("sc=%p\n", sc);
345
346         ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
347         usbd_transfer_unsetup(sc->sc_xfer, UBSA_N_TRANSFER);
348
349         device_claim_softc(dev);
350
351         ubsa_free_softc(sc);
352
353         return (0);
354 }
355
356 UCOM_UNLOAD_DRAIN(ubsa);
357
358 static void
359 ubsa_free_softc(struct ubsa_softc *sc)
360 {
361         if (ucom_unref(&sc->sc_super_ucom)) {
362                 mtx_destroy(&sc->sc_mtx);
363                 device_free_softc(sc);
364         }
365 }
366
367 static void
368 ubsa_free(struct ucom_softc *ucom)
369 {
370         ubsa_free_softc(ucom->sc_parent);
371 }
372
373 static void
374 ubsa_cfg_request(struct ubsa_softc *sc, uint8_t index, uint16_t value)
375 {
376         struct usb_device_request req;
377         usb_error_t err;
378
379         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
380         req.bRequest = index;
381         USETW(req.wValue, value);
382         req.wIndex[0] = sc->sc_iface_no;
383         req.wIndex[1] = 0;
384         USETW(req.wLength, 0);
385
386         err = ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, 
387             &req, NULL, 0, 1000);
388         if (err) {
389                 DPRINTFN(0, "device request failed, err=%s "
390                     "(ignored)\n", usbd_errstr(err));
391         }
392 }
393
394 static void
395 ubsa_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
396 {
397         struct ubsa_softc *sc = ucom->sc_parent;
398
399         DPRINTF("onoff = %d\n", onoff);
400
401         ubsa_cfg_request(sc, UBSA_REG_DTR, onoff ? 1 : 0);
402 }
403
404 static void
405 ubsa_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
406 {
407         struct ubsa_softc *sc = ucom->sc_parent;
408
409         DPRINTF("onoff = %d\n", onoff);
410
411         ubsa_cfg_request(sc, UBSA_REG_RTS, onoff ? 1 : 0);
412 }
413
414 static void
415 ubsa_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
416 {
417         struct ubsa_softc *sc = ucom->sc_parent;
418
419         DPRINTF("onoff = %d\n", onoff);
420
421         ubsa_cfg_request(sc, UBSA_REG_BREAK, onoff ? 1 : 0);
422 }
423
424 static int
425 ubsa_pre_param(struct ucom_softc *ucom, struct termios *t)
426 {
427
428         DPRINTF("sc = %p\n", ucom->sc_parent);
429
430         switch (t->c_ospeed) {
431         case B0:
432         case B300:
433         case B600:
434         case B1200:
435         case B2400:
436         case B4800:
437         case B9600:
438         case B19200:
439         case B38400:
440         case B57600:
441         case B115200:
442         case B230400:
443                 break;
444         default:
445                 return (EINVAL);
446         }
447         return (0);
448 }
449
450 static void
451 ubsa_cfg_param(struct ucom_softc *ucom, struct termios *t)
452 {
453         struct ubsa_softc *sc = ucom->sc_parent;
454         uint16_t value = 0;
455
456         DPRINTF("sc = %p\n", sc);
457
458         switch (t->c_ospeed) {
459         case B0:
460                 ubsa_cfg_request(sc, UBSA_REG_FLOW_CTRL, 0);
461                 ubsa_cfg_set_dtr(&sc->sc_ucom, 0);
462                 ubsa_cfg_set_rts(&sc->sc_ucom, 0);
463                 break;
464         case B300:
465         case B600:
466         case B1200:
467         case B2400:
468         case B4800:
469         case B9600:
470         case B19200:
471         case B38400:
472         case B57600:
473         case B115200:
474         case B230400:
475                 value = B230400 / t->c_ospeed;
476                 ubsa_cfg_request(sc, UBSA_REG_BAUDRATE, value);
477                 break;
478         default:
479                 return;
480         }
481
482         if (t->c_cflag & PARENB)
483                 value = (t->c_cflag & PARODD) ? UBSA_PARITY_ODD : UBSA_PARITY_EVEN;
484         else
485                 value = UBSA_PARITY_NONE;
486
487         ubsa_cfg_request(sc, UBSA_REG_PARITY, value);
488
489         switch (t->c_cflag & CSIZE) {
490         case CS5:
491                 value = 0;
492                 break;
493         case CS6:
494                 value = 1;
495                 break;
496         case CS7:
497                 value = 2;
498                 break;
499         default:
500         case CS8:
501                 value = 3;
502                 break;
503         }
504
505         ubsa_cfg_request(sc, UBSA_REG_DATA_BITS, value);
506
507         value = (t->c_cflag & CSTOPB) ? 1 : 0;
508
509         ubsa_cfg_request(sc, UBSA_REG_STOP_BITS, value);
510
511         value = 0;
512         if (t->c_cflag & CRTSCTS)
513                 value |= UBSA_FLOW_OCTS | UBSA_FLOW_IRTS;
514
515         if (t->c_iflag & (IXON | IXOFF))
516                 value |= UBSA_FLOW_OXON | UBSA_FLOW_IXON;
517
518         ubsa_cfg_request(sc, UBSA_REG_FLOW_CTRL, value);
519 }
520
521 static void
522 ubsa_start_read(struct ucom_softc *ucom)
523 {
524         struct ubsa_softc *sc = ucom->sc_parent;
525
526         /* start interrupt endpoint */
527         usbd_transfer_start(sc->sc_xfer[UBSA_INTR_DT_RD]);
528
529         /* start read endpoint */
530         usbd_transfer_start(sc->sc_xfer[UBSA_BULK_DT_RD]);
531 }
532
533 static void
534 ubsa_stop_read(struct ucom_softc *ucom)
535 {
536         struct ubsa_softc *sc = ucom->sc_parent;
537
538         /* stop interrupt endpoint */
539         usbd_transfer_stop(sc->sc_xfer[UBSA_INTR_DT_RD]);
540
541         /* stop read endpoint */
542         usbd_transfer_stop(sc->sc_xfer[UBSA_BULK_DT_RD]);
543 }
544
545 static void
546 ubsa_start_write(struct ucom_softc *ucom)
547 {
548         struct ubsa_softc *sc = ucom->sc_parent;
549
550         usbd_transfer_start(sc->sc_xfer[UBSA_BULK_DT_WR]);
551 }
552
553 static void
554 ubsa_stop_write(struct ucom_softc *ucom)
555 {
556         struct ubsa_softc *sc = ucom->sc_parent;
557
558         usbd_transfer_stop(sc->sc_xfer[UBSA_BULK_DT_WR]);
559 }
560
561 static void
562 ubsa_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr)
563 {
564         struct ubsa_softc *sc = ucom->sc_parent;
565
566         DPRINTF("\n");
567
568         *lsr = sc->sc_lsr;
569         *msr = sc->sc_msr;
570 }
571
572 static void
573 ubsa_write_callback(struct usb_xfer *xfer, usb_error_t error)
574 {
575         struct ubsa_softc *sc = usbd_xfer_softc(xfer);
576         struct usb_page_cache *pc;
577         uint32_t actlen;
578
579         switch (USB_GET_STATE(xfer)) {
580         case USB_ST_SETUP:
581         case USB_ST_TRANSFERRED:
582 tr_setup:
583                 pc = usbd_xfer_get_frame(xfer, 0);
584                 if (ucom_get_data(&sc->sc_ucom, pc, 0,
585                     UBSA_BSIZE, &actlen)) {
586
587                         usbd_xfer_set_frame_len(xfer, 0, actlen);
588                         usbd_transfer_submit(xfer);
589                 }
590                 return;
591
592         default:                        /* Error */
593                 if (error != USB_ERR_CANCELLED) {
594                         /* try to clear stall first */
595                         usbd_xfer_set_stall(xfer);
596                         goto tr_setup;
597                 }
598                 return;
599
600         }
601 }
602
603 static void
604 ubsa_read_callback(struct usb_xfer *xfer, usb_error_t error)
605 {
606         struct ubsa_softc *sc = usbd_xfer_softc(xfer);
607         struct usb_page_cache *pc;
608         int actlen;
609
610         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
611
612         switch (USB_GET_STATE(xfer)) {
613         case USB_ST_TRANSFERRED:
614                 pc = usbd_xfer_get_frame(xfer, 0);
615                 ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
616
617         case USB_ST_SETUP:
618 tr_setup:
619                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
620                 usbd_transfer_submit(xfer);
621                 return;
622
623         default:                        /* Error */
624                 if (error != USB_ERR_CANCELLED) {
625                         /* try to clear stall first */
626                         usbd_xfer_set_stall(xfer);
627                         goto tr_setup;
628                 }
629                 return;
630
631         }
632 }
633
634 static void
635 ubsa_intr_callback(struct usb_xfer *xfer, usb_error_t error)
636 {
637         struct ubsa_softc *sc = usbd_xfer_softc(xfer);
638         struct usb_page_cache *pc;
639         uint8_t buf[4];
640         int actlen;
641
642         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
643
644         switch (USB_GET_STATE(xfer)) {
645         case USB_ST_TRANSFERRED:
646
647                 if (actlen >= (int)sizeof(buf)) {
648                         pc = usbd_xfer_get_frame(xfer, 0);
649                         usbd_copy_out(pc, 0, buf, sizeof(buf));
650
651                         /*
652                          * incidentally, Belkin adapter status bits match
653                          * UART 16550 bits
654                          */
655                         sc->sc_lsr = buf[2];
656                         sc->sc_msr = buf[3];
657
658                         DPRINTF("lsr = 0x%02x, msr = 0x%02x\n",
659                             sc->sc_lsr, sc->sc_msr);
660
661                         ucom_status_change(&sc->sc_ucom);
662                 } else {
663                         DPRINTF("ignoring short packet, %d bytes\n", actlen);
664                 }
665
666         case USB_ST_SETUP:
667 tr_setup:
668                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
669                 usbd_transfer_submit(xfer);
670                 return;
671
672         default:                        /* Error */
673                 if (error != USB_ERR_CANCELLED) {
674                         /* try to clear stall first */
675                         usbd_xfer_set_stall(xfer);
676                         goto tr_setup;
677                 }
678                 return;
679
680         }
681 }
682
683 static void
684 ubsa_poll(struct ucom_softc *ucom)
685 {
686         struct ubsa_softc *sc = ucom->sc_parent;
687         usbd_transfer_poll(sc->sc_xfer, UBSA_N_TRANSFER);
688
689 }