xref: /freebsd/sys/dev/usb/serial/umoscom.c (revision 77013d11e6483b970af25e13c9b892075742f7e5) 
1 /* $FreeBSD$ */
2 /*	$OpenBSD: umoscom.c,v 1.2 2006/10/26 06:02:43 jsg Exp $	*/
3 
4 /*
5  * Copyright (c) 2006 Jonathan Gray <jsg@openbsd.org>
6  *
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.
10  *
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.
18  */
19 
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>
27 #include <sys/bus.h>
28 #include <sys/module.h>
29 #include <sys/lock.h>
30 #include <sys/mutex.h>
31 #include <sys/condvar.h>
32 #include <sys/sysctl.h>
33 #include <sys/sx.h>
34 #include <sys/unistd.h>
35 #include <sys/callout.h>
36 #include <sys/malloc.h>
37 #include <sys/priv.h>
38 
39 #include <dev/usb/usb.h>
40 #include <dev/usb/usbdi.h>
41 #include <dev/usb/usbdi_util.h>
42 #include "usbdevs.h"
43 
44 #define	USB_DEBUG_VAR umoscom_debug
45 #include <dev/usb/usb_debug.h>
46 #include <dev/usb/usb_process.h>
47 
48 #include <dev/usb/serial/usb_serial.h>
49 
50 #ifdef USB_DEBUG
51 static int umoscom_debug = 0;
52 
53 static SYSCTL_NODE(_hw_usb, OID_AUTO, umoscom, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
54     "USB umoscom");
55 SYSCTL_INT(_hw_usb_umoscom, OID_AUTO, debug, CTLFLAG_RWTUN,
56     &umoscom_debug, 0, "Debug level");
57 #endif
58 
59 #define	UMOSCOM_BUFSIZE	       1024	/* bytes */
60 
61 #define	UMOSCOM_CONFIG_INDEX	0
62 #define	UMOSCOM_IFACE_INDEX	0
63 
64 /* interrupt packet */
65 #define	UMOSCOM_IIR_RLS		0x06
66 #define	UMOSCOM_IIR_RDA		0x04
67 #define	UMOSCOM_IIR_CTI		0x0c
68 #define	UMOSCOM_IIR_THR		0x02
69 #define	UMOSCOM_IIR_MS		0x00
70 
71 /* registers */
72 #define	UMOSCOM_READ		0x0d
73 #define	UMOSCOM_WRITE		0x0e
74 #define	UMOSCOM_UART_REG	0x0300
75 #define	UMOSCOM_VEND_REG	0x0000
76 
77 #define	UMOSCOM_TXBUF		0x00	/* Write */
78 #define	UMOSCOM_RXBUF		0x00	/* Read */
79 #define	UMOSCOM_INT		0x01
80 #define	UMOSCOM_FIFO		0x02	/* Write */
81 #define	UMOSCOM_ISR		0x02	/* Read */
82 #define	UMOSCOM_LCR		0x03
83 #define	UMOSCOM_MCR		0x04
84 #define	UMOSCOM_LSR		0x05
85 #define	UMOSCOM_MSR		0x06
86 #define	UMOSCOM_SCRATCH		0x07
87 #define	UMOSCOM_DIV_LO		0x08
88 #define	UMOSCOM_DIV_HI		0x09
89 #define	UMOSCOM_EFR		0x0a
90 #define	UMOSCOM_XON1		0x0b
91 #define	UMOSCOM_XON2		0x0c
92 #define	UMOSCOM_XOFF1		0x0d
93 #define	UMOSCOM_XOFF2		0x0e
94 
95 #define	UMOSCOM_BAUDLO		0x00
96 #define	UMOSCOM_BAUDHI		0x01
97 
98 #define	UMOSCOM_INT_RXEN	0x01
99 #define	UMOSCOM_INT_TXEN	0x02
100 #define	UMOSCOM_INT_RSEN	0x04
101 #define	UMOSCOM_INT_MDMEM	0x08
102 #define	UMOSCOM_INT_SLEEP	0x10
103 #define	UMOSCOM_INT_XOFF	0x20
104 #define	UMOSCOM_INT_RTS		0x40
105 
106 #define	UMOSCOM_FIFO_EN		0x01
107 #define	UMOSCOM_FIFO_RXCLR	0x02
108 #define	UMOSCOM_FIFO_TXCLR	0x04
109 #define	UMOSCOM_FIFO_DMA_BLK	0x08
110 #define	UMOSCOM_FIFO_TXLVL_MASK	0x30
111 #define	UMOSCOM_FIFO_TXLVL_8	0x00
112 #define	UMOSCOM_FIFO_TXLVL_16	0x10
113 #define	UMOSCOM_FIFO_TXLVL_32	0x20
114 #define	UMOSCOM_FIFO_TXLVL_56	0x30
115 #define	UMOSCOM_FIFO_RXLVL_MASK	0xc0
116 #define	UMOSCOM_FIFO_RXLVL_8	0x00
117 #define	UMOSCOM_FIFO_RXLVL_16	0x40
118 #define	UMOSCOM_FIFO_RXLVL_56	0x80
119 #define	UMOSCOM_FIFO_RXLVL_80	0xc0
120 
121 #define	UMOSCOM_ISR_MDM		0x00
122 #define	UMOSCOM_ISR_NONE	0x01
123 #define	UMOSCOM_ISR_TX		0x02
124 #define	UMOSCOM_ISR_RX		0x04
125 #define	UMOSCOM_ISR_LINE	0x06
126 #define	UMOSCOM_ISR_RXTIMEOUT	0x0c
127 #define	UMOSCOM_ISR_RX_XOFF	0x10
128 #define	UMOSCOM_ISR_RTSCTS	0x20
129 #define	UMOSCOM_ISR_FIFOEN	0xc0
130 
131 #define	UMOSCOM_LCR_DBITS(x)	((x) - 5)
132 #define	UMOSCOM_LCR_STOP_BITS_1	0x00
133 #define	UMOSCOM_LCR_STOP_BITS_2	0x04	/* 2 if 6-8 bits/char or 1.5 if 5 */
134 #define	UMOSCOM_LCR_PARITY_NONE	0x00
135 #define	UMOSCOM_LCR_PARITY_ODD	0x08
136 #define	UMOSCOM_LCR_PARITY_EVEN	0x18
137 #define	UMOSCOM_LCR_BREAK	0x40
138 #define	UMOSCOM_LCR_DIVLATCH_EN	0x80
139 
140 #define	UMOSCOM_MCR_DTR		0x01
141 #define	UMOSCOM_MCR_RTS		0x02
142 #define	UMOSCOM_MCR_LOOP	0x04
143 #define	UMOSCOM_MCR_INTEN	0x08
144 #define	UMOSCOM_MCR_LOOPBACK	0x10
145 #define	UMOSCOM_MCR_XONANY	0x20
146 #define	UMOSCOM_MCR_IRDA_EN	0x40
147 #define	UMOSCOM_MCR_BAUD_DIV4	0x80
148 
149 #define	UMOSCOM_LSR_RXDATA	0x01
150 #define	UMOSCOM_LSR_RXOVER	0x02
151 #define	UMOSCOM_LSR_RXPAR_ERR	0x04
152 #define	UMOSCOM_LSR_RXFRM_ERR	0x08
153 #define	UMOSCOM_LSR_RXBREAK	0x10
154 #define	UMOSCOM_LSR_TXEMPTY	0x20
155 #define	UMOSCOM_LSR_TXALLEMPTY	0x40
156 #define	UMOSCOM_LSR_TXFIFO_ERR	0x80
157 
158 #define	UMOSCOM_MSR_CTS_CHG	0x01
159 #define	UMOSCOM_MSR_DSR_CHG	0x02
160 #define	UMOSCOM_MSR_RI_CHG	0x04
161 #define	UMOSCOM_MSR_CD_CHG	0x08
162 #define	UMOSCOM_MSR_CTS		0x10
163 #define	UMOSCOM_MSR_RTS		0x20
164 #define	UMOSCOM_MSR_RI		0x40
165 #define	UMOSCOM_MSR_CD		0x80
166 
167 #define	UMOSCOM_BAUD_REF	115200
168 
169 enum {
170 	UMOSCOM_BULK_DT_WR,
171 	UMOSCOM_BULK_DT_RD,
172 	UMOSCOM_INTR_DT_RD,
173 	UMOSCOM_N_TRANSFER,
174 };
175 
176 struct umoscom_softc {
177 	struct ucom_super_softc sc_super_ucom;
178 	struct ucom_softc sc_ucom;
179 
180 	struct usb_xfer *sc_xfer[UMOSCOM_N_TRANSFER];
181 	struct usb_device *sc_udev;
182 	struct mtx sc_mtx;
183 
184 	uint8_t	sc_mcr;
185 	uint8_t	sc_lcr;
186 };
187 
188 /* prototypes */
189 
190 static device_probe_t umoscom_probe;
191 static device_attach_t umoscom_attach;
192 static device_detach_t umoscom_detach;
193 static void umoscom_free_softc(struct umoscom_softc *);
194 
195 static usb_callback_t umoscom_write_callback;
196 static usb_callback_t umoscom_read_callback;
197 static usb_callback_t umoscom_intr_callback;
198 
199 static void	umoscom_free(struct ucom_softc *);
200 static void	umoscom_cfg_open(struct ucom_softc *);
201 static void	umoscom_cfg_close(struct ucom_softc *);
202 static void	umoscom_cfg_set_break(struct ucom_softc *, uint8_t);
203 static void	umoscom_cfg_set_dtr(struct ucom_softc *, uint8_t);
204 static void	umoscom_cfg_set_rts(struct ucom_softc *, uint8_t);
205 static int	umoscom_pre_param(struct ucom_softc *, struct termios *);
206 static void	umoscom_cfg_param(struct ucom_softc *, struct termios *);
207 static void	umoscom_cfg_get_status(struct ucom_softc *, uint8_t *,
208 		    uint8_t *);
209 static void	umoscom_cfg_write(struct umoscom_softc *, uint16_t, uint16_t);
210 static uint8_t	umoscom_cfg_read(struct umoscom_softc *, uint16_t);
211 static void	umoscom_start_read(struct ucom_softc *);
212 static void	umoscom_stop_read(struct ucom_softc *);
213 static void	umoscom_start_write(struct ucom_softc *);
214 static void	umoscom_stop_write(struct ucom_softc *);
215 static void	umoscom_poll(struct ucom_softc *ucom);
216 
217 static const struct usb_config umoscom_config_data[UMOSCOM_N_TRANSFER] = {
218 	[UMOSCOM_BULK_DT_WR] = {
219 		.type = UE_BULK,
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,
225 	},
226 
227 	[UMOSCOM_BULK_DT_RD] = {
228 		.type = UE_BULK,
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,
234 	},
235 
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,
243 	},
244 };
245 
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,
255 
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,
264 };
265 
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),
270 	DEVMETHOD_END
271 };
272 
273 static devclass_t umoscom_devclass;
274 
275 static driver_t umoscom_driver = {
276 	.name = "umoscom",
277 	.methods = umoscom_methods,
278 	.size = sizeof(struct umoscom_softc),
279 };
280 
281 static const STRUCT_USB_HOST_ID umoscom_devs[] = {
282 	{USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703, 0)}
283 };
284 
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);
290 
291 static int
292 umoscom_probe(device_t dev)
293 {
294 	struct usb_attach_arg *uaa = device_get_ivars(dev);
295 
296 	if (uaa->usb_mode != USB_MODE_HOST) {
297 		return (ENXIO);
298 	}
299 	if (uaa->info.bConfigIndex != UMOSCOM_CONFIG_INDEX) {
300 		return (ENXIO);
301 	}
302 	if (uaa->info.bIfaceIndex != UMOSCOM_IFACE_INDEX) {
303 		return (ENXIO);
304 	}
305 	return (usbd_lookup_id_by_uaa(umoscom_devs, sizeof(umoscom_devs), uaa));
306 }
307 
308 static int
309 umoscom_attach(device_t dev)
310 {
311 	struct usb_attach_arg *uaa = device_get_ivars(dev);
312 	struct umoscom_softc *sc = device_get_softc(dev);
313 	int error;
314 	uint8_t iface_index;
315 
316 	sc->sc_udev = uaa->device;
317 	sc->sc_mcr = 0x08;		/* enable interrupts */
318 
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");
322 
323 	mtx_init(&sc->sc_mtx, "umoscom", NULL, MTX_DEF);
324 	ucom_ref(&sc->sc_super_ucom);
325 
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);
330 
331 	if (error) {
332 		goto detach;
333 	}
334 	/* clear stall at first run */
335 	mtx_lock(&sc->sc_mtx);
336 	usbd_xfer_set_zlp(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
337 	mtx_unlock(&sc->sc_mtx);
338 
339 	error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
340 	    &umoscom_callback, &sc->sc_mtx);
341 	if (error) {
342 		goto detach;
343 	}
344 	ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
345 
346 	return (0);
347 
348 detach:
349 	device_printf(dev, "attach error: %s\n", usbd_errstr(error));
350 	umoscom_detach(dev);
351 	return (ENXIO);
352 }
353 
354 static int
355 umoscom_detach(device_t dev)
356 {
357 	struct umoscom_softc *sc = device_get_softc(dev);
358 
359 	ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
360 	usbd_transfer_unsetup(sc->sc_xfer, UMOSCOM_N_TRANSFER);
361 
362 	device_claim_softc(dev);
363 
364 	umoscom_free_softc(sc);
365 
366 	return (0);
367 }
368 
369 UCOM_UNLOAD_DRAIN(umoscom);
370 
371 static void
372 umoscom_free_softc(struct umoscom_softc *sc)
373 {
374 	if (ucom_unref(&sc->sc_super_ucom)) {
375 		mtx_destroy(&sc->sc_mtx);
376 		device_free_softc(sc);
377 	}
378 }
379 
380 static void
381 umoscom_free(struct ucom_softc *ucom)
382 {
383 	umoscom_free_softc(ucom->sc_parent);
384 }
385 
386 static void
387 umoscom_cfg_open(struct ucom_softc *ucom)
388 {
389 	struct umoscom_softc *sc = ucom->sc_parent;
390 
391 	DPRINTF("\n");
392 
393 	/* Purge FIFOs or odd things happen */
394 	umoscom_cfg_write(sc, UMOSCOM_FIFO, 0x00 | UMOSCOM_UART_REG);
395 
396 	/* Enable FIFO */
397 	umoscom_cfg_write(sc, UMOSCOM_FIFO, UMOSCOM_FIFO_EN |
398 	    UMOSCOM_FIFO_RXCLR | UMOSCOM_FIFO_TXCLR |
399 	    UMOSCOM_FIFO_DMA_BLK | UMOSCOM_FIFO_RXLVL_MASK |
400 	    UMOSCOM_UART_REG);
401 
402 	/* Enable Interrupt Registers */
403 	umoscom_cfg_write(sc, UMOSCOM_INT, 0x0C | UMOSCOM_UART_REG);
404 
405 	/* Magic */
406 	umoscom_cfg_write(sc, 0x01, 0x08);
407 
408 	/* Magic */
409 	umoscom_cfg_write(sc, 0x00, 0x02);
410 }
411 
412 static void
413 umoscom_cfg_close(struct ucom_softc *ucom)
414 {
415 	return;
416 }
417 
418 static void
419 umoscom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
420 {
421 	struct umoscom_softc *sc = ucom->sc_parent;
422 	uint16_t val;
423 
424 	val = sc->sc_lcr;
425 	if (onoff)
426 		val |= UMOSCOM_LCR_BREAK;
427 
428 	umoscom_cfg_write(sc, UMOSCOM_LCR, val | UMOSCOM_UART_REG);
429 }
430 
431 static void
432 umoscom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
433 {
434 	struct umoscom_softc *sc = ucom->sc_parent;
435 
436 	if (onoff)
437 		sc->sc_mcr |= UMOSCOM_MCR_DTR;
438 	else
439 		sc->sc_mcr &= ~UMOSCOM_MCR_DTR;
440 
441 	umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
442 }
443 
444 static void
445 umoscom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
446 {
447 	struct umoscom_softc *sc = ucom->sc_parent;
448 
449 	if (onoff)
450 		sc->sc_mcr |= UMOSCOM_MCR_RTS;
451 	else
452 		sc->sc_mcr &= ~UMOSCOM_MCR_RTS;
453 
454 	umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
455 }
456 
457 static int
458 umoscom_pre_param(struct ucom_softc *ucom, struct termios *t)
459 {
460 	if ((t->c_ospeed <= 1) || (t->c_ospeed > 115200))
461 		return (EINVAL);
462 
463 	return (0);
464 }
465 
466 static void
467 umoscom_cfg_param(struct ucom_softc *ucom, struct termios *t)
468 {
469 	struct umoscom_softc *sc = ucom->sc_parent;
470 	uint16_t data;
471 
472 	DPRINTF("speed=%d\n", t->c_ospeed);
473 
474 	data = ((uint32_t)UMOSCOM_BAUD_REF) / ((uint32_t)t->c_ospeed);
475 
476 	if (data == 0) {
477 		DPRINTF("invalid baud rate!\n");
478 		return;
479 	}
480 	umoscom_cfg_write(sc, UMOSCOM_LCR,
481 	    UMOSCOM_LCR_DIVLATCH_EN | UMOSCOM_UART_REG);
482 
483 	umoscom_cfg_write(sc, UMOSCOM_BAUDLO,
484 	    (data & 0xFF) | UMOSCOM_UART_REG);
485 
486 	umoscom_cfg_write(sc, UMOSCOM_BAUDHI,
487 	    ((data >> 8) & 0xFF) | UMOSCOM_UART_REG);
488 
489 	if (t->c_cflag & CSTOPB)
490 		data = UMOSCOM_LCR_STOP_BITS_2;
491 	else
492 		data = UMOSCOM_LCR_STOP_BITS_1;
493 
494 	if (t->c_cflag & PARENB) {
495 		if (t->c_cflag & PARODD)
496 			data |= UMOSCOM_LCR_PARITY_ODD;
497 		else
498 			data |= UMOSCOM_LCR_PARITY_EVEN;
499 	} else
500 		data |= UMOSCOM_LCR_PARITY_NONE;
501 
502 	switch (t->c_cflag & CSIZE) {
503 	case CS5:
504 		data |= UMOSCOM_LCR_DBITS(5);
505 		break;
506 	case CS6:
507 		data |= UMOSCOM_LCR_DBITS(6);
508 		break;
509 	case CS7:
510 		data |= UMOSCOM_LCR_DBITS(7);
511 		break;
512 	case CS8:
513 		data |= UMOSCOM_LCR_DBITS(8);
514 		break;
515 	}
516 
517 	sc->sc_lcr = data;
518 	umoscom_cfg_write(sc, UMOSCOM_LCR, data | UMOSCOM_UART_REG);
519 }
520 
521 static void
522 umoscom_cfg_get_status(struct ucom_softc *ucom, uint8_t *p_lsr, uint8_t *p_msr)
523 {
524 	struct umoscom_softc *sc = ucom->sc_parent;
525 	uint8_t msr;
526 
527 	DPRINTFN(5, "\n");
528 
529 	/*
530 	 * Read status registers.  MSR bits need translation from ns16550 to
531 	 * SER_* values.  LSR bits are ns16550 in hardware and ucom.
532 	 */
533 
534 	*p_lsr = umoscom_cfg_read(sc, UMOSCOM_LSR);
535 	msr = umoscom_cfg_read(sc, UMOSCOM_MSR);
536 
537 	/* translate bits */
538 
539 	if (msr & UMOSCOM_MSR_CTS)
540 		*p_msr |= SER_CTS;
541 
542 	if (msr & UMOSCOM_MSR_CD)
543 		*p_msr |= SER_DCD;
544 
545 	if (msr & UMOSCOM_MSR_RI)
546 		*p_msr |= SER_RI;
547 
548 	if (msr & UMOSCOM_MSR_RTS)
549 		*p_msr |= SER_DSR;
550 }
551 
552 static void
553 umoscom_cfg_write(struct umoscom_softc *sc, uint16_t reg, uint16_t val)
554 {
555 	struct usb_device_request req;
556 
557 	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
558 	req.bRequest = UMOSCOM_WRITE;
559 	USETW(req.wValue, val);
560 	USETW(req.wIndex, reg);
561 	USETW(req.wLength, 0);
562 
563 	ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
564 	    &req, NULL, 0, 1000);
565 }
566 
567 static uint8_t
568 umoscom_cfg_read(struct umoscom_softc *sc, uint16_t reg)
569 {
570 	struct usb_device_request req;
571 	uint8_t val;
572 
573 	req.bmRequestType = UT_READ_VENDOR_DEVICE;
574 	req.bRequest = UMOSCOM_READ;
575 	USETW(req.wValue, 0);
576 	USETW(req.wIndex, reg);
577 	USETW(req.wLength, 1);
578 
579 	ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
580 	    &req, &val, 0, 1000);
581 
582 	DPRINTF("reg=0x%04x, val=0x%02x\n", reg, val);
583 
584 	return (val);
585 }
586 
587 static void
588 umoscom_start_read(struct ucom_softc *ucom)
589 {
590 	struct umoscom_softc *sc = ucom->sc_parent;
591 
592 #if 0
593 	/* start interrupt endpoint */
594 	usbd_transfer_start(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
595 #endif
596 	/* start read endpoint */
597 	usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
598 }
599 
600 static void
601 umoscom_stop_read(struct ucom_softc *ucom)
602 {
603 	struct umoscom_softc *sc = ucom->sc_parent;
604 
605 	/* stop interrupt transfer */
606 	usbd_transfer_stop(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
607 
608 	/* stop read endpoint */
609 	usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
610 }
611 
612 static void
613 umoscom_start_write(struct ucom_softc *ucom)
614 {
615 	struct umoscom_softc *sc = ucom->sc_parent;
616 
617 	usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
618 }
619 
620 static void
621 umoscom_stop_write(struct ucom_softc *ucom)
622 {
623 	struct umoscom_softc *sc = ucom->sc_parent;
624 
625 	usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
626 }
627 
628 static void
629 umoscom_write_callback(struct usb_xfer *xfer, usb_error_t error)
630 {
631 	struct umoscom_softc *sc = usbd_xfer_softc(xfer);
632 	struct usb_page_cache *pc;
633 	uint32_t actlen;
634 
635 	switch (USB_GET_STATE(xfer)) {
636 	case USB_ST_SETUP:
637 	case USB_ST_TRANSFERRED:
638 tr_setup:
639 		DPRINTF("\n");
640 
641 		if (usbd_xfer_get_and_clr_zlp(xfer))
642 			break;
643 
644 		pc = usbd_xfer_get_frame(xfer, 0);
645 		if (ucom_get_data(&sc->sc_ucom, pc, 0,
646 		    UMOSCOM_BUFSIZE, &actlen)) {
647 			usbd_xfer_set_frame_len(xfer, 0, actlen);
648 			usbd_transfer_submit(xfer);
649 		}
650 		break;
651 
652 	default:			/* Error */
653 		if (error != USB_ERR_CANCELLED) {
654 			DPRINTFN(0, "transfer failed\n");
655 			/* try to clear stall first */
656 			usbd_xfer_set_stall(xfer);
657 			goto tr_setup;
658 		}
659 		break;
660 	}
661 }
662 
663 static void
664 umoscom_read_callback(struct usb_xfer *xfer, usb_error_t error)
665 {
666 	struct umoscom_softc *sc = usbd_xfer_softc(xfer);
667 	struct usb_page_cache *pc;
668 	int actlen;
669 
670 	usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
671 
672 	switch (USB_GET_STATE(xfer)) {
673 	case USB_ST_TRANSFERRED:
674 		DPRINTF("got %d bytes\n", actlen);
675 		pc = usbd_xfer_get_frame(xfer, 0);
676 		ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
677 
678 	case USB_ST_SETUP:
679 tr_setup:
680 		DPRINTF("\n");
681 
682 		usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
683 		usbd_transfer_submit(xfer);
684 		return;
685 
686 	default:			/* Error */
687 		if (error != USB_ERR_CANCELLED) {
688 			DPRINTFN(0, "transfer failed\n");
689 			/* try to clear stall first */
690 			usbd_xfer_set_stall(xfer);
691 			goto tr_setup;
692 		}
693 		return;
694 	}
695 }
696 
697 static void
698 umoscom_intr_callback(struct usb_xfer *xfer, usb_error_t error)
699 {
700 	struct umoscom_softc *sc = usbd_xfer_softc(xfer);
701 	int actlen;
702 
703 	usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
704 
705 	switch (USB_GET_STATE(xfer)) {
706 	case USB_ST_TRANSFERRED:
707 		if (actlen < 2) {
708 			DPRINTF("too short message\n");
709 			goto tr_setup;
710 		}
711 		ucom_status_change(&sc->sc_ucom);
712 
713 	case USB_ST_SETUP:
714 tr_setup:
715 		usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
716 		usbd_transfer_submit(xfer);
717 		return;
718 
719 	default:			/* Error */
720 		if (error != USB_ERR_CANCELLED) {
721 			DPRINTFN(0, "transfer failed\n");
722 			/* try to clear stall first */
723 			usbd_xfer_set_stall(xfer);
724 			goto tr_setup;
725 		}
726 		return;
727 	}
728 }
729 
730 static void
731 umoscom_poll(struct ucom_softc *ucom)
732 {
733 	struct umoscom_softc *sc = ucom->sc_parent;
734 	usbd_transfer_poll(sc->sc_xfer, UMOSCOM_N_TRANSFER);
735 }
736