2 /* $OpenBSD: umoscom.c,v 1.2 2006/10/26 06:02:43 jsg Exp $ */
5 * Copyright (c) 2006 Jonathan Gray <jsg@openbsd.org>
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #include <sys/stdint.h>
21 #include <sys/stddef.h>
22 #include <sys/param.h>
23 #include <sys/queue.h>
24 #include <sys/types.h>
25 #include <sys/systm.h>
26 #include <sys/kernel.h>
28 #include <sys/module.h>
30 #include <sys/mutex.h>
31 #include <sys/condvar.h>
32 #include <sys/sysctl.h>
34 #include <sys/unistd.h>
35 #include <sys/callout.h>
36 #include <sys/malloc.h>
39 #include <dev/usb/usb.h>
40 #include <dev/usb/usbdi.h>
41 #include <dev/usb/usbdi_util.h>
44 #define USB_DEBUG_VAR umoscom_debug
45 #include <dev/usb/usb_debug.h>
46 #include <dev/usb/usb_process.h>
48 #include <dev/usb/serial/usb_serial.h>
51 static int umoscom_debug = 0;
53 SYSCTL_NODE(_hw_usb, OID_AUTO, umoscom, CTLFLAG_RW, 0, "USB umoscom");
54 SYSCTL_INT(_hw_usb_umoscom, OID_AUTO, debug, CTLFLAG_RW,
55 &umoscom_debug, 0, "Debug level");
58 #define UMOSCOM_BUFSIZE 1024 /* bytes */
60 #define UMOSCOM_CONFIG_INDEX 0
61 #define UMOSCOM_IFACE_INDEX 0
63 /* interrupt packet */
64 #define UMOSCOM_IIR_RLS 0x06
65 #define UMOSCOM_IIR_RDA 0x04
66 #define UMOSCOM_IIR_CTI 0x0c
67 #define UMOSCOM_IIR_THR 0x02
68 #define UMOSCOM_IIR_MS 0x00
71 #define UMOSCOM_READ 0x0d
72 #define UMOSCOM_WRITE 0x0e
73 #define UMOSCOM_UART_REG 0x0300
74 #define UMOSCOM_VEND_REG 0x0000
76 #define UMOSCOM_TXBUF 0x00 /* Write */
77 #define UMOSCOM_RXBUF 0x00 /* Read */
78 #define UMOSCOM_INT 0x01
79 #define UMOSCOM_FIFO 0x02 /* Write */
80 #define UMOSCOM_ISR 0x02 /* Read */
81 #define UMOSCOM_LCR 0x03
82 #define UMOSCOM_MCR 0x04
83 #define UMOSCOM_LSR 0x05
84 #define UMOSCOM_MSR 0x06
85 #define UMOSCOM_SCRATCH 0x07
86 #define UMOSCOM_DIV_LO 0x08
87 #define UMOSCOM_DIV_HI 0x09
88 #define UMOSCOM_EFR 0x0a
89 #define UMOSCOM_XON1 0x0b
90 #define UMOSCOM_XON2 0x0c
91 #define UMOSCOM_XOFF1 0x0d
92 #define UMOSCOM_XOFF2 0x0e
94 #define UMOSCOM_BAUDLO 0x00
95 #define UMOSCOM_BAUDHI 0x01
97 #define UMOSCOM_INT_RXEN 0x01
98 #define UMOSCOM_INT_TXEN 0x02
99 #define UMOSCOM_INT_RSEN 0x04
100 #define UMOSCOM_INT_MDMEM 0x08
101 #define UMOSCOM_INT_SLEEP 0x10
102 #define UMOSCOM_INT_XOFF 0x20
103 #define UMOSCOM_INT_RTS 0x40
105 #define UMOSCOM_FIFO_EN 0x01
106 #define UMOSCOM_FIFO_RXCLR 0x02
107 #define UMOSCOM_FIFO_TXCLR 0x04
108 #define UMOSCOM_FIFO_DMA_BLK 0x08
109 #define UMOSCOM_FIFO_TXLVL_MASK 0x30
110 #define UMOSCOM_FIFO_TXLVL_8 0x00
111 #define UMOSCOM_FIFO_TXLVL_16 0x10
112 #define UMOSCOM_FIFO_TXLVL_32 0x20
113 #define UMOSCOM_FIFO_TXLVL_56 0x30
114 #define UMOSCOM_FIFO_RXLVL_MASK 0xc0
115 #define UMOSCOM_FIFO_RXLVL_8 0x00
116 #define UMOSCOM_FIFO_RXLVL_16 0x40
117 #define UMOSCOM_FIFO_RXLVL_56 0x80
118 #define UMOSCOM_FIFO_RXLVL_80 0xc0
120 #define UMOSCOM_ISR_MDM 0x00
121 #define UMOSCOM_ISR_NONE 0x01
122 #define UMOSCOM_ISR_TX 0x02
123 #define UMOSCOM_ISR_RX 0x04
124 #define UMOSCOM_ISR_LINE 0x06
125 #define UMOSCOM_ISR_RXTIMEOUT 0x0c
126 #define UMOSCOM_ISR_RX_XOFF 0x10
127 #define UMOSCOM_ISR_RTSCTS 0x20
128 #define UMOSCOM_ISR_FIFOEN 0xc0
130 #define UMOSCOM_LCR_DBITS(x) ((x) - 5)
131 #define UMOSCOM_LCR_STOP_BITS_1 0x00
132 #define UMOSCOM_LCR_STOP_BITS_2 0x04 /* 2 if 6-8 bits/char or 1.5 if 5 */
133 #define UMOSCOM_LCR_PARITY_NONE 0x00
134 #define UMOSCOM_LCR_PARITY_ODD 0x08
135 #define UMOSCOM_LCR_PARITY_EVEN 0x18
136 #define UMOSCOM_LCR_BREAK 0x40
137 #define UMOSCOM_LCR_DIVLATCH_EN 0x80
139 #define UMOSCOM_MCR_DTR 0x01
140 #define UMOSCOM_MCR_RTS 0x02
141 #define UMOSCOM_MCR_LOOP 0x04
142 #define UMOSCOM_MCR_INTEN 0x08
143 #define UMOSCOM_MCR_LOOPBACK 0x10
144 #define UMOSCOM_MCR_XONANY 0x20
145 #define UMOSCOM_MCR_IRDA_EN 0x40
146 #define UMOSCOM_MCR_BAUD_DIV4 0x80
148 #define UMOSCOM_LSR_RXDATA 0x01
149 #define UMOSCOM_LSR_RXOVER 0x02
150 #define UMOSCOM_LSR_RXPAR_ERR 0x04
151 #define UMOSCOM_LSR_RXFRM_ERR 0x08
152 #define UMOSCOM_LSR_RXBREAK 0x10
153 #define UMOSCOM_LSR_TXEMPTY 0x20
154 #define UMOSCOM_LSR_TXALLEMPTY 0x40
155 #define UMOSCOM_LSR_TXFIFO_ERR 0x80
157 #define UMOSCOM_MSR_CTS_CHG 0x01
158 #define UMOSCOM_MSR_DSR_CHG 0x02
159 #define UMOSCOM_MSR_RI_CHG 0x04
160 #define UMOSCOM_MSR_CD_CHG 0x08
161 #define UMOSCOM_MSR_CTS 0x10
162 #define UMOSCOM_MSR_RTS 0x20
163 #define UMOSCOM_MSR_RI 0x40
164 #define UMOSCOM_MSR_CD 0x80
166 #define UMOSCOM_BAUD_REF 115200
175 struct umoscom_softc {
176 struct ucom_super_softc sc_super_ucom;
177 struct ucom_softc sc_ucom;
179 struct usb_xfer *sc_xfer[UMOSCOM_N_TRANSFER];
180 struct usb_device *sc_udev;
189 static device_probe_t umoscom_probe;
190 static device_attach_t umoscom_attach;
191 static device_detach_t umoscom_detach;
193 static usb_callback_t umoscom_write_callback;
194 static usb_callback_t umoscom_read_callback;
195 static usb_callback_t umoscom_intr_callback;
197 static void umoscom_cfg_open(struct ucom_softc *);
198 static void umoscom_cfg_close(struct ucom_softc *);
199 static void umoscom_cfg_set_break(struct ucom_softc *, uint8_t);
200 static void umoscom_cfg_set_dtr(struct ucom_softc *, uint8_t);
201 static void umoscom_cfg_set_rts(struct ucom_softc *, uint8_t);
202 static int umoscom_pre_param(struct ucom_softc *, struct termios *);
203 static void umoscom_cfg_param(struct ucom_softc *, struct termios *);
204 static void umoscom_cfg_get_status(struct ucom_softc *, uint8_t *,
206 static void umoscom_cfg_write(struct umoscom_softc *, uint16_t, uint16_t);
207 static uint8_t umoscom_cfg_read(struct umoscom_softc *, uint16_t);
208 static void umoscom_start_read(struct ucom_softc *);
209 static void umoscom_stop_read(struct ucom_softc *);
210 static void umoscom_start_write(struct ucom_softc *);
211 static void umoscom_stop_write(struct ucom_softc *);
212 static void umoscom_poll(struct ucom_softc *ucom);
214 static const struct usb_config umoscom_config_data[UMOSCOM_N_TRANSFER] = {
216 [UMOSCOM_BULK_DT_WR] = {
218 .endpoint = UE_ADDR_ANY,
219 .direction = UE_DIR_OUT,
220 .bufsize = UMOSCOM_BUFSIZE,
221 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
222 .callback = &umoscom_write_callback,
225 [UMOSCOM_BULK_DT_RD] = {
227 .endpoint = UE_ADDR_ANY,
228 .direction = UE_DIR_IN,
229 .bufsize = UMOSCOM_BUFSIZE,
230 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
231 .callback = &umoscom_read_callback,
234 [UMOSCOM_INTR_DT_RD] = {
235 .type = UE_INTERRUPT,
236 .endpoint = UE_ADDR_ANY,
237 .direction = UE_DIR_IN,
238 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
239 .bufsize = 0, /* use wMaxPacketSize */
240 .callback = &umoscom_intr_callback,
244 static const struct ucom_callback umoscom_callback = {
245 /* configuration callbacks */
246 .ucom_cfg_get_status = &umoscom_cfg_get_status,
247 .ucom_cfg_set_dtr = &umoscom_cfg_set_dtr,
248 .ucom_cfg_set_rts = &umoscom_cfg_set_rts,
249 .ucom_cfg_set_break = &umoscom_cfg_set_break,
250 .ucom_cfg_param = &umoscom_cfg_param,
251 .ucom_cfg_open = &umoscom_cfg_open,
252 .ucom_cfg_close = &umoscom_cfg_close,
254 /* other callbacks */
255 .ucom_pre_param = &umoscom_pre_param,
256 .ucom_start_read = &umoscom_start_read,
257 .ucom_stop_read = &umoscom_stop_read,
258 .ucom_start_write = &umoscom_start_write,
259 .ucom_stop_write = &umoscom_stop_write,
260 .ucom_poll = &umoscom_poll,
263 static device_method_t umoscom_methods[] = {
264 DEVMETHOD(device_probe, umoscom_probe),
265 DEVMETHOD(device_attach, umoscom_attach),
266 DEVMETHOD(device_detach, umoscom_detach),
270 static devclass_t umoscom_devclass;
272 static driver_t umoscom_driver = {
274 .methods = umoscom_methods,
275 .size = sizeof(struct umoscom_softc),
278 DRIVER_MODULE(umoscom, uhub, umoscom_driver, umoscom_devclass, NULL, 0);
279 MODULE_DEPEND(umoscom, ucom, 1, 1, 1);
280 MODULE_DEPEND(umoscom, usb, 1, 1, 1);
281 MODULE_VERSION(umoscom, 1);
283 static const STRUCT_USB_HOST_ID umoscom_devs[] = {
284 {USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703, 0)}
288 umoscom_probe(device_t dev)
290 struct usb_attach_arg *uaa = device_get_ivars(dev);
292 if (uaa->usb_mode != USB_MODE_HOST) {
295 if (uaa->info.bConfigIndex != UMOSCOM_CONFIG_INDEX) {
298 if (uaa->info.bIfaceIndex != UMOSCOM_IFACE_INDEX) {
301 return (usbd_lookup_id_by_uaa(umoscom_devs, sizeof(umoscom_devs), uaa));
305 umoscom_attach(device_t dev)
307 struct usb_attach_arg *uaa = device_get_ivars(dev);
308 struct umoscom_softc *sc = device_get_softc(dev);
312 sc->sc_udev = uaa->device;
313 sc->sc_mcr = 0x08; /* enable interrupts */
315 /* XXX the device doesn't provide any ID string, so set a static one */
316 device_set_desc(dev, "MOSCHIP USB Serial Port Adapter");
317 device_printf(dev, "<MOSCHIP USB Serial Port Adapter>\n");
319 mtx_init(&sc->sc_mtx, "umoscom", NULL, MTX_DEF);
321 iface_index = UMOSCOM_IFACE_INDEX;
322 error = usbd_transfer_setup(uaa->device, &iface_index,
323 sc->sc_xfer, umoscom_config_data,
324 UMOSCOM_N_TRANSFER, sc, &sc->sc_mtx);
329 /* clear stall at first run */
330 mtx_lock(&sc->sc_mtx);
331 usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
332 usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
333 mtx_unlock(&sc->sc_mtx);
335 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
336 &umoscom_callback, &sc->sc_mtx);
340 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
345 device_printf(dev, "attach error: %s\n", usbd_errstr(error));
351 umoscom_detach(device_t dev)
353 struct umoscom_softc *sc = device_get_softc(dev);
355 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
356 usbd_transfer_unsetup(sc->sc_xfer, UMOSCOM_N_TRANSFER);
357 mtx_destroy(&sc->sc_mtx);
363 umoscom_cfg_open(struct ucom_softc *ucom)
365 struct umoscom_softc *sc = ucom->sc_parent;
369 /* Purge FIFOs or odd things happen */
370 umoscom_cfg_write(sc, UMOSCOM_FIFO, 0x00 | UMOSCOM_UART_REG);
373 umoscom_cfg_write(sc, UMOSCOM_FIFO, UMOSCOM_FIFO_EN |
374 UMOSCOM_FIFO_RXCLR | UMOSCOM_FIFO_TXCLR |
375 UMOSCOM_FIFO_DMA_BLK | UMOSCOM_FIFO_RXLVL_MASK |
378 /* Enable Interrupt Registers */
379 umoscom_cfg_write(sc, UMOSCOM_INT, 0x0C | UMOSCOM_UART_REG);
382 umoscom_cfg_write(sc, 0x01, 0x08);
385 umoscom_cfg_write(sc, 0x00, 0x02);
389 umoscom_cfg_close(struct ucom_softc *ucom)
395 umoscom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
397 struct umoscom_softc *sc = ucom->sc_parent;
402 val |= UMOSCOM_LCR_BREAK;
404 umoscom_cfg_write(sc, UMOSCOM_LCR, val | UMOSCOM_UART_REG);
408 umoscom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
410 struct umoscom_softc *sc = ucom->sc_parent;
413 sc->sc_mcr |= UMOSCOM_MCR_DTR;
415 sc->sc_mcr &= ~UMOSCOM_MCR_DTR;
417 umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
421 umoscom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
423 struct umoscom_softc *sc = ucom->sc_parent;
426 sc->sc_mcr |= UMOSCOM_MCR_RTS;
428 sc->sc_mcr &= ~UMOSCOM_MCR_RTS;
430 umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
434 umoscom_pre_param(struct ucom_softc *ucom, struct termios *t)
436 if ((t->c_ospeed <= 1) || (t->c_ospeed > 115200))
443 umoscom_cfg_param(struct ucom_softc *ucom, struct termios *t)
445 struct umoscom_softc *sc = ucom->sc_parent;
448 DPRINTF("speed=%d\n", t->c_ospeed);
450 data = ((uint32_t)UMOSCOM_BAUD_REF) / ((uint32_t)t->c_ospeed);
453 DPRINTF("invalid baud rate!\n");
456 umoscom_cfg_write(sc, UMOSCOM_LCR,
457 UMOSCOM_LCR_DIVLATCH_EN | UMOSCOM_UART_REG);
459 umoscom_cfg_write(sc, UMOSCOM_BAUDLO,
460 (data & 0xFF) | UMOSCOM_UART_REG);
462 umoscom_cfg_write(sc, UMOSCOM_BAUDHI,
463 ((data >> 8) & 0xFF) | UMOSCOM_UART_REG);
465 if (t->c_cflag & CSTOPB)
466 data = UMOSCOM_LCR_STOP_BITS_2;
468 data = UMOSCOM_LCR_STOP_BITS_1;
470 if (t->c_cflag & PARENB) {
471 if (t->c_cflag & PARODD)
472 data |= UMOSCOM_LCR_PARITY_ODD;
474 data |= UMOSCOM_LCR_PARITY_EVEN;
476 data |= UMOSCOM_LCR_PARITY_NONE;
478 switch (t->c_cflag & CSIZE) {
480 data |= UMOSCOM_LCR_DBITS(5);
483 data |= UMOSCOM_LCR_DBITS(6);
486 data |= UMOSCOM_LCR_DBITS(7);
489 data |= UMOSCOM_LCR_DBITS(8);
494 umoscom_cfg_write(sc, UMOSCOM_LCR, data | UMOSCOM_UART_REG);
498 umoscom_cfg_get_status(struct ucom_softc *ucom, uint8_t *p_lsr, uint8_t *p_msr)
500 struct umoscom_softc *sc = ucom->sc_parent;
506 /* read status registers */
508 lsr = umoscom_cfg_read(sc, UMOSCOM_LSR);
509 msr = umoscom_cfg_read(sc, UMOSCOM_MSR);
513 if (msr & UMOSCOM_MSR_CTS)
516 if (msr & UMOSCOM_MSR_CD)
519 if (msr & UMOSCOM_MSR_RI)
522 if (msr & UMOSCOM_MSR_RTS)
527 umoscom_cfg_write(struct umoscom_softc *sc, uint16_t reg, uint16_t val)
529 struct usb_device_request req;
531 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
532 req.bRequest = UMOSCOM_WRITE;
533 USETW(req.wValue, val);
534 USETW(req.wIndex, reg);
535 USETW(req.wLength, 0);
537 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
538 &req, NULL, 0, 1000);
542 umoscom_cfg_read(struct umoscom_softc *sc, uint16_t reg)
544 struct usb_device_request req;
547 req.bmRequestType = UT_READ_VENDOR_DEVICE;
548 req.bRequest = UMOSCOM_READ;
549 USETW(req.wValue, 0);
550 USETW(req.wIndex, reg);
551 USETW(req.wLength, 1);
553 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
554 &req, &val, 0, 1000);
556 DPRINTF("reg=0x%04x, val=0x%02x\n", reg, val);
562 umoscom_start_read(struct ucom_softc *ucom)
564 struct umoscom_softc *sc = ucom->sc_parent;
567 /* start interrupt endpoint */
568 usbd_transfer_start(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
570 /* start read endpoint */
571 usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
575 umoscom_stop_read(struct ucom_softc *ucom)
577 struct umoscom_softc *sc = ucom->sc_parent;
579 /* stop interrupt transfer */
580 usbd_transfer_stop(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
582 /* stop read endpoint */
583 usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
587 umoscom_start_write(struct ucom_softc *ucom)
589 struct umoscom_softc *sc = ucom->sc_parent;
591 usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
595 umoscom_stop_write(struct ucom_softc *ucom)
597 struct umoscom_softc *sc = ucom->sc_parent;
599 usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
603 umoscom_write_callback(struct usb_xfer *xfer, usb_error_t error)
605 struct umoscom_softc *sc = usbd_xfer_softc(xfer);
606 struct usb_page_cache *pc;
609 switch (USB_GET_STATE(xfer)) {
611 case USB_ST_TRANSFERRED:
615 pc = usbd_xfer_get_frame(xfer, 0);
616 if (ucom_get_data(&sc->sc_ucom, pc, 0,
617 UMOSCOM_BUFSIZE, &actlen)) {
619 usbd_xfer_set_frame_len(xfer, 0, actlen);
620 usbd_transfer_submit(xfer);
625 if (error != USB_ERR_CANCELLED) {
626 DPRINTFN(0, "transfer failed\n");
627 /* try to clear stall first */
628 usbd_xfer_set_stall(xfer);
636 umoscom_read_callback(struct usb_xfer *xfer, usb_error_t error)
638 struct umoscom_softc *sc = usbd_xfer_softc(xfer);
639 struct usb_page_cache *pc;
642 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
644 switch (USB_GET_STATE(xfer)) {
645 case USB_ST_TRANSFERRED:
646 DPRINTF("got %d bytes\n", actlen);
647 pc = usbd_xfer_get_frame(xfer, 0);
648 ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
654 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
655 usbd_transfer_submit(xfer);
659 if (error != USB_ERR_CANCELLED) {
660 DPRINTFN(0, "transfer failed\n");
661 /* try to clear stall first */
662 usbd_xfer_set_stall(xfer);
670 umoscom_intr_callback(struct usb_xfer *xfer, usb_error_t error)
672 struct umoscom_softc *sc = usbd_xfer_softc(xfer);
675 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
677 switch (USB_GET_STATE(xfer)) {
678 case USB_ST_TRANSFERRED:
680 DPRINTF("too short message\n");
683 ucom_status_change(&sc->sc_ucom);
687 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
688 usbd_transfer_submit(xfer);
692 if (error != USB_ERR_CANCELLED) {
693 DPRINTFN(0, "transfer failed\n");
694 /* try to clear stall first */
695 usbd_xfer_set_stall(xfer);
703 umoscom_poll(struct ucom_softc *ucom)
705 struct umoscom_softc *sc = ucom->sc_parent;
706 usbd_transfer_poll(sc->sc_xfer, UMOSCOM_N_TRANSFER);