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 static SYSCTL_NODE(_hw_usb, OID_AUTO, umoscom, CTLFLAG_RW, 0, "USB umoscom");
54 SYSCTL_INT(_hw_usb_umoscom, OID_AUTO, debug, CTLFLAG_RWTUN,
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;
192 static void umoscom_free_softc(struct umoscom_softc *);
194 static usb_callback_t umoscom_write_callback;
195 static usb_callback_t umoscom_read_callback;
196 static usb_callback_t umoscom_intr_callback;
198 static void umoscom_free(struct ucom_softc *);
199 static void umoscom_cfg_open(struct ucom_softc *);
200 static void umoscom_cfg_close(struct ucom_softc *);
201 static void umoscom_cfg_set_break(struct ucom_softc *, uint8_t);
202 static void umoscom_cfg_set_dtr(struct ucom_softc *, uint8_t);
203 static void umoscom_cfg_set_rts(struct ucom_softc *, uint8_t);
204 static int umoscom_pre_param(struct ucom_softc *, struct termios *);
205 static void umoscom_cfg_param(struct ucom_softc *, struct termios *);
206 static void umoscom_cfg_get_status(struct ucom_softc *, uint8_t *,
208 static void umoscom_cfg_write(struct umoscom_softc *, uint16_t, uint16_t);
209 static uint8_t umoscom_cfg_read(struct umoscom_softc *, uint16_t);
210 static void umoscom_start_read(struct ucom_softc *);
211 static void umoscom_stop_read(struct ucom_softc *);
212 static void umoscom_start_write(struct ucom_softc *);
213 static void umoscom_stop_write(struct ucom_softc *);
214 static void umoscom_poll(struct ucom_softc *ucom);
216 static const struct usb_config umoscom_config_data[UMOSCOM_N_TRANSFER] = {
218 [UMOSCOM_BULK_DT_WR] = {
220 .endpoint = UE_ADDR_ANY,
221 .direction = UE_DIR_OUT,
222 .bufsize = UMOSCOM_BUFSIZE,
223 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
224 .callback = &umoscom_write_callback,
227 [UMOSCOM_BULK_DT_RD] = {
229 .endpoint = UE_ADDR_ANY,
230 .direction = UE_DIR_IN,
231 .bufsize = UMOSCOM_BUFSIZE,
232 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
233 .callback = &umoscom_read_callback,
236 [UMOSCOM_INTR_DT_RD] = {
237 .type = UE_INTERRUPT,
238 .endpoint = UE_ADDR_ANY,
239 .direction = UE_DIR_IN,
240 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
241 .bufsize = 0, /* use wMaxPacketSize */
242 .callback = &umoscom_intr_callback,
246 static const struct ucom_callback umoscom_callback = {
247 /* configuration callbacks */
248 .ucom_cfg_get_status = &umoscom_cfg_get_status,
249 .ucom_cfg_set_dtr = &umoscom_cfg_set_dtr,
250 .ucom_cfg_set_rts = &umoscom_cfg_set_rts,
251 .ucom_cfg_set_break = &umoscom_cfg_set_break,
252 .ucom_cfg_param = &umoscom_cfg_param,
253 .ucom_cfg_open = &umoscom_cfg_open,
254 .ucom_cfg_close = &umoscom_cfg_close,
256 /* other callbacks */
257 .ucom_pre_param = &umoscom_pre_param,
258 .ucom_start_read = &umoscom_start_read,
259 .ucom_stop_read = &umoscom_stop_read,
260 .ucom_start_write = &umoscom_start_write,
261 .ucom_stop_write = &umoscom_stop_write,
262 .ucom_poll = &umoscom_poll,
263 .ucom_free = &umoscom_free,
266 static device_method_t umoscom_methods[] = {
267 DEVMETHOD(device_probe, umoscom_probe),
268 DEVMETHOD(device_attach, umoscom_attach),
269 DEVMETHOD(device_detach, umoscom_detach),
273 static devclass_t umoscom_devclass;
275 static driver_t umoscom_driver = {
277 .methods = umoscom_methods,
278 .size = sizeof(struct umoscom_softc),
281 static const STRUCT_USB_HOST_ID umoscom_devs[] = {
282 {USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703, 0)}
285 DRIVER_MODULE(umoscom, uhub, umoscom_driver, umoscom_devclass, NULL, 0);
286 MODULE_DEPEND(umoscom, ucom, 1, 1, 1);
287 MODULE_DEPEND(umoscom, usb, 1, 1, 1);
288 MODULE_VERSION(umoscom, 1);
289 USB_PNP_HOST_INFO(umoscom_devs);
292 umoscom_probe(device_t dev)
294 struct usb_attach_arg *uaa = device_get_ivars(dev);
296 if (uaa->usb_mode != USB_MODE_HOST) {
299 if (uaa->info.bConfigIndex != UMOSCOM_CONFIG_INDEX) {
302 if (uaa->info.bIfaceIndex != UMOSCOM_IFACE_INDEX) {
305 return (usbd_lookup_id_by_uaa(umoscom_devs, sizeof(umoscom_devs), uaa));
309 umoscom_attach(device_t dev)
311 struct usb_attach_arg *uaa = device_get_ivars(dev);
312 struct umoscom_softc *sc = device_get_softc(dev);
316 sc->sc_udev = uaa->device;
317 sc->sc_mcr = 0x08; /* enable interrupts */
319 /* XXX the device doesn't provide any ID string, so set a static one */
320 device_set_desc(dev, "MOSCHIP USB Serial Port Adapter");
321 device_printf(dev, "<MOSCHIP USB Serial Port Adapter>\n");
323 mtx_init(&sc->sc_mtx, "umoscom", NULL, MTX_DEF);
324 ucom_ref(&sc->sc_super_ucom);
326 iface_index = UMOSCOM_IFACE_INDEX;
327 error = usbd_transfer_setup(uaa->device, &iface_index,
328 sc->sc_xfer, umoscom_config_data,
329 UMOSCOM_N_TRANSFER, sc, &sc->sc_mtx);
334 /* clear stall at first run */
335 mtx_lock(&sc->sc_mtx);
336 usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
337 usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
338 mtx_unlock(&sc->sc_mtx);
340 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
341 &umoscom_callback, &sc->sc_mtx);
345 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
350 device_printf(dev, "attach error: %s\n", usbd_errstr(error));
356 umoscom_detach(device_t dev)
358 struct umoscom_softc *sc = device_get_softc(dev);
360 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
361 usbd_transfer_unsetup(sc->sc_xfer, UMOSCOM_N_TRANSFER);
363 device_claim_softc(dev);
365 umoscom_free_softc(sc);
370 UCOM_UNLOAD_DRAIN(umoscom);
373 umoscom_free_softc(struct umoscom_softc *sc)
375 if (ucom_unref(&sc->sc_super_ucom)) {
376 mtx_destroy(&sc->sc_mtx);
377 device_free_softc(sc);
382 umoscom_free(struct ucom_softc *ucom)
384 umoscom_free_softc(ucom->sc_parent);
388 umoscom_cfg_open(struct ucom_softc *ucom)
390 struct umoscom_softc *sc = ucom->sc_parent;
394 /* Purge FIFOs or odd things happen */
395 umoscom_cfg_write(sc, UMOSCOM_FIFO, 0x00 | UMOSCOM_UART_REG);
398 umoscom_cfg_write(sc, UMOSCOM_FIFO, UMOSCOM_FIFO_EN |
399 UMOSCOM_FIFO_RXCLR | UMOSCOM_FIFO_TXCLR |
400 UMOSCOM_FIFO_DMA_BLK | UMOSCOM_FIFO_RXLVL_MASK |
403 /* Enable Interrupt Registers */
404 umoscom_cfg_write(sc, UMOSCOM_INT, 0x0C | UMOSCOM_UART_REG);
407 umoscom_cfg_write(sc, 0x01, 0x08);
410 umoscom_cfg_write(sc, 0x00, 0x02);
414 umoscom_cfg_close(struct ucom_softc *ucom)
420 umoscom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
422 struct umoscom_softc *sc = ucom->sc_parent;
427 val |= UMOSCOM_LCR_BREAK;
429 umoscom_cfg_write(sc, UMOSCOM_LCR, val | UMOSCOM_UART_REG);
433 umoscom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
435 struct umoscom_softc *sc = ucom->sc_parent;
438 sc->sc_mcr |= UMOSCOM_MCR_DTR;
440 sc->sc_mcr &= ~UMOSCOM_MCR_DTR;
442 umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
446 umoscom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
448 struct umoscom_softc *sc = ucom->sc_parent;
451 sc->sc_mcr |= UMOSCOM_MCR_RTS;
453 sc->sc_mcr &= ~UMOSCOM_MCR_RTS;
455 umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
459 umoscom_pre_param(struct ucom_softc *ucom, struct termios *t)
461 if ((t->c_ospeed <= 1) || (t->c_ospeed > 115200))
468 umoscom_cfg_param(struct ucom_softc *ucom, struct termios *t)
470 struct umoscom_softc *sc = ucom->sc_parent;
473 DPRINTF("speed=%d\n", t->c_ospeed);
475 data = ((uint32_t)UMOSCOM_BAUD_REF) / ((uint32_t)t->c_ospeed);
478 DPRINTF("invalid baud rate!\n");
481 umoscom_cfg_write(sc, UMOSCOM_LCR,
482 UMOSCOM_LCR_DIVLATCH_EN | UMOSCOM_UART_REG);
484 umoscom_cfg_write(sc, UMOSCOM_BAUDLO,
485 (data & 0xFF) | UMOSCOM_UART_REG);
487 umoscom_cfg_write(sc, UMOSCOM_BAUDHI,
488 ((data >> 8) & 0xFF) | UMOSCOM_UART_REG);
490 if (t->c_cflag & CSTOPB)
491 data = UMOSCOM_LCR_STOP_BITS_2;
493 data = UMOSCOM_LCR_STOP_BITS_1;
495 if (t->c_cflag & PARENB) {
496 if (t->c_cflag & PARODD)
497 data |= UMOSCOM_LCR_PARITY_ODD;
499 data |= UMOSCOM_LCR_PARITY_EVEN;
501 data |= UMOSCOM_LCR_PARITY_NONE;
503 switch (t->c_cflag & CSIZE) {
505 data |= UMOSCOM_LCR_DBITS(5);
508 data |= UMOSCOM_LCR_DBITS(6);
511 data |= UMOSCOM_LCR_DBITS(7);
514 data |= UMOSCOM_LCR_DBITS(8);
519 umoscom_cfg_write(sc, UMOSCOM_LCR, data | UMOSCOM_UART_REG);
523 umoscom_cfg_get_status(struct ucom_softc *ucom, uint8_t *p_lsr, uint8_t *p_msr)
525 struct umoscom_softc *sc = ucom->sc_parent;
531 * Read status registers. MSR bits need translation from ns16550 to
532 * SER_* values. LSR bits are ns16550 in hardware and ucom.
535 *p_lsr = umoscom_cfg_read(sc, UMOSCOM_LSR);
536 msr = umoscom_cfg_read(sc, UMOSCOM_MSR);
540 if (msr & UMOSCOM_MSR_CTS)
543 if (msr & UMOSCOM_MSR_CD)
546 if (msr & UMOSCOM_MSR_RI)
549 if (msr & UMOSCOM_MSR_RTS)
554 umoscom_cfg_write(struct umoscom_softc *sc, uint16_t reg, uint16_t val)
556 struct usb_device_request req;
558 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
559 req.bRequest = UMOSCOM_WRITE;
560 USETW(req.wValue, val);
561 USETW(req.wIndex, reg);
562 USETW(req.wLength, 0);
564 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
565 &req, NULL, 0, 1000);
569 umoscom_cfg_read(struct umoscom_softc *sc, uint16_t reg)
571 struct usb_device_request req;
574 req.bmRequestType = UT_READ_VENDOR_DEVICE;
575 req.bRequest = UMOSCOM_READ;
576 USETW(req.wValue, 0);
577 USETW(req.wIndex, reg);
578 USETW(req.wLength, 1);
580 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
581 &req, &val, 0, 1000);
583 DPRINTF("reg=0x%04x, val=0x%02x\n", reg, val);
589 umoscom_start_read(struct ucom_softc *ucom)
591 struct umoscom_softc *sc = ucom->sc_parent;
594 /* start interrupt endpoint */
595 usbd_transfer_start(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
597 /* start read endpoint */
598 usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
602 umoscom_stop_read(struct ucom_softc *ucom)
604 struct umoscom_softc *sc = ucom->sc_parent;
606 /* stop interrupt transfer */
607 usbd_transfer_stop(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
609 /* stop read endpoint */
610 usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
614 umoscom_start_write(struct ucom_softc *ucom)
616 struct umoscom_softc *sc = ucom->sc_parent;
618 usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
622 umoscom_stop_write(struct ucom_softc *ucom)
624 struct umoscom_softc *sc = ucom->sc_parent;
626 usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
630 umoscom_write_callback(struct usb_xfer *xfer, usb_error_t error)
632 struct umoscom_softc *sc = usbd_xfer_softc(xfer);
633 struct usb_page_cache *pc;
636 switch (USB_GET_STATE(xfer)) {
638 case USB_ST_TRANSFERRED:
642 pc = usbd_xfer_get_frame(xfer, 0);
643 if (ucom_get_data(&sc->sc_ucom, pc, 0,
644 UMOSCOM_BUFSIZE, &actlen)) {
646 usbd_xfer_set_frame_len(xfer, 0, actlen);
647 usbd_transfer_submit(xfer);
652 if (error != USB_ERR_CANCELLED) {
653 DPRINTFN(0, "transfer failed\n");
654 /* try to clear stall first */
655 usbd_xfer_set_stall(xfer);
663 umoscom_read_callback(struct usb_xfer *xfer, usb_error_t error)
665 struct umoscom_softc *sc = usbd_xfer_softc(xfer);
666 struct usb_page_cache *pc;
669 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
671 switch (USB_GET_STATE(xfer)) {
672 case USB_ST_TRANSFERRED:
673 DPRINTF("got %d bytes\n", actlen);
674 pc = usbd_xfer_get_frame(xfer, 0);
675 ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
681 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
682 usbd_transfer_submit(xfer);
686 if (error != USB_ERR_CANCELLED) {
687 DPRINTFN(0, "transfer failed\n");
688 /* try to clear stall first */
689 usbd_xfer_set_stall(xfer);
697 umoscom_intr_callback(struct usb_xfer *xfer, usb_error_t error)
699 struct umoscom_softc *sc = usbd_xfer_softc(xfer);
702 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
704 switch (USB_GET_STATE(xfer)) {
705 case USB_ST_TRANSFERRED:
707 DPRINTF("too short message\n");
710 ucom_status_change(&sc->sc_ucom);
714 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
715 usbd_transfer_submit(xfer);
719 if (error != USB_ERR_CANCELLED) {
720 DPRINTFN(0, "transfer failed\n");
721 /* try to clear stall first */
722 usbd_xfer_set_stall(xfer);
730 umoscom_poll(struct ucom_softc *ucom)
732 struct umoscom_softc *sc = ucom->sc_parent;
733 usbd_transfer_poll(sc->sc_xfer, UMOSCOM_N_TRANSFER);