1 /* $NetBSD: uftdi.c,v 1.13 2002/09/23 05:51:23 simonb Exp $ */
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Lennart Augustsson (lennart@augustsson.net).
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
43 * NOTE: all function names beginning like "uftdi_cfg_" can only
44 * be called from within the config thread function !
48 * FTDI FT8U100AX serial adapter driver
51 #include <sys/stdint.h>
52 #include <sys/stddef.h>
53 #include <sys/param.h>
54 #include <sys/queue.h>
55 #include <sys/types.h>
56 #include <sys/systm.h>
57 #include <sys/kernel.h>
59 #include <sys/linker_set.h>
60 #include <sys/module.h>
62 #include <sys/mutex.h>
63 #include <sys/condvar.h>
64 #include <sys/sysctl.h>
66 #include <sys/unistd.h>
67 #include <sys/callout.h>
68 #include <sys/malloc.h>
71 #include <dev/usb/usb.h>
72 #include <dev/usb/usbdi.h>
73 #include <dev/usb/usbdi_util.h>
76 #define USB_DEBUG_VAR uftdi_debug
77 #include <dev/usb/usb_debug.h>
78 #include <dev/usb/usb_process.h>
80 #include <dev/usb/serial/usb_serial.h>
81 #include <dev/usb/serial/uftdi_reg.h>
84 static int uftdi_debug = 0;
86 SYSCTL_NODE(_hw_usb, OID_AUTO, uftdi, CTLFLAG_RW, 0, "USB uftdi");
87 SYSCTL_INT(_hw_usb_uftdi, OID_AUTO, debug, CTLFLAG_RW,
88 &uftdi_debug, 0, "Debug level");
91 #define UFTDI_CONFIG_INDEX 0
92 #define UFTDI_IFACE_INDEX 0
94 #define UFTDI_OBUFSIZE 64 /* bytes, cannot be increased due to
104 struct ucom_super_softc sc_super_ucom;
105 struct ucom_softc sc_ucom;
107 struct usb_device *sc_udev;
108 struct usb_xfer *sc_xfer[UFTDI_N_TRANSFER];
113 enum uftdi_type sc_type;
115 uint16_t sc_last_lcr;
117 uint8_t sc_iface_index;
125 struct uftdi_param_config {
135 static device_probe_t uftdi_probe;
136 static device_attach_t uftdi_attach;
137 static device_detach_t uftdi_detach;
139 static usb_callback_t uftdi_write_callback;
140 static usb_callback_t uftdi_read_callback;
142 static void uftdi_cfg_open(struct ucom_softc *);
143 static void uftdi_cfg_set_dtr(struct ucom_softc *, uint8_t);
144 static void uftdi_cfg_set_rts(struct ucom_softc *, uint8_t);
145 static void uftdi_cfg_set_break(struct ucom_softc *, uint8_t);
146 static int uftdi_set_parm_soft(struct termios *,
147 struct uftdi_param_config *, uint8_t);
148 static int uftdi_pre_param(struct ucom_softc *, struct termios *);
149 static void uftdi_cfg_param(struct ucom_softc *, struct termios *);
150 static void uftdi_cfg_get_status(struct ucom_softc *, uint8_t *,
152 static void uftdi_start_read(struct ucom_softc *);
153 static void uftdi_stop_read(struct ucom_softc *);
154 static void uftdi_start_write(struct ucom_softc *);
155 static void uftdi_stop_write(struct ucom_softc *);
156 static uint8_t uftdi_8u232am_getrate(uint32_t, uint16_t *);
157 static void uftdi_poll(struct ucom_softc *ucom);
159 static const struct usb_config uftdi_config[UFTDI_N_TRANSFER] = {
161 [UFTDI_BULK_DT_WR] = {
163 .endpoint = UE_ADDR_ANY,
164 .direction = UE_DIR_OUT,
165 .bufsize = UFTDI_OBUFSIZE,
166 .flags = {.pipe_bof = 1,},
167 .callback = &uftdi_write_callback,
170 [UFTDI_BULK_DT_RD] = {
172 .endpoint = UE_ADDR_ANY,
173 .direction = UE_DIR_IN,
174 .bufsize = 0, /* use wMaxPacketSize */
175 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
176 .callback = &uftdi_read_callback,
180 static const struct ucom_callback uftdi_callback = {
181 .ucom_cfg_get_status = &uftdi_cfg_get_status,
182 .ucom_cfg_set_dtr = &uftdi_cfg_set_dtr,
183 .ucom_cfg_set_rts = &uftdi_cfg_set_rts,
184 .ucom_cfg_set_break = &uftdi_cfg_set_break,
185 .ucom_cfg_param = &uftdi_cfg_param,
186 .ucom_cfg_open = &uftdi_cfg_open,
187 .ucom_pre_param = &uftdi_pre_param,
188 .ucom_start_read = &uftdi_start_read,
189 .ucom_stop_read = &uftdi_stop_read,
190 .ucom_start_write = &uftdi_start_write,
191 .ucom_stop_write = &uftdi_stop_write,
192 .ucom_poll = &uftdi_poll,
195 static device_method_t uftdi_methods[] = {
196 /* Device interface */
197 DEVMETHOD(device_probe, uftdi_probe),
198 DEVMETHOD(device_attach, uftdi_attach),
199 DEVMETHOD(device_detach, uftdi_detach),
204 static devclass_t uftdi_devclass;
206 static driver_t uftdi_driver = {
208 .methods = uftdi_methods,
209 .size = sizeof(struct uftdi_softc),
212 DRIVER_MODULE(uftdi, uhub, uftdi_driver, uftdi_devclass, NULL, 0);
213 MODULE_DEPEND(uftdi, ucom, 1, 1, 1);
214 MODULE_DEPEND(uftdi, usb, 1, 1, 1);
215 MODULE_VERSION(uftdi, 1);
217 static struct usb_device_id uftdi_devs[] = {
218 #define UFTDI_DEV(v,p,t) \
219 { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, UFTDI_TYPE_##t) }
220 UFTDI_DEV(ATMEL, STK541, 8U232AM),
221 UFTDI_DEV(DRESDENELEKTRONIK, SENSORTERMINALBOARD, 8U232AM),
222 UFTDI_DEV(DRESDENELEKTRONIK, WIRELESSHANDHELDTERMINAL, 8U232AM),
223 UFTDI_DEV(FTDI, GAMMASCOUT, 8U232AM),
224 UFTDI_DEV(FTDI, SERIAL_8U100AX, SIO),
225 UFTDI_DEV(FTDI, SERIAL_2232C, 8U232AM),
226 UFTDI_DEV(FTDI, SERIAL_2232D, 8U232AM),
227 UFTDI_DEV(FTDI, SERIAL_4232H, 8U232AM),
228 UFTDI_DEV(FTDI, SERIAL_8U232AM, 8U232AM),
229 UFTDI_DEV(FTDI, SERIAL_8U232AM4, 8U232AM),
230 UFTDI_DEV(FTDI, SEMC_DSS20, 8U232AM),
231 UFTDI_DEV(FTDI, CFA_631, 8U232AM),
232 UFTDI_DEV(FTDI, CFA_632, 8U232AM),
233 UFTDI_DEV(FTDI, CFA_633, 8U232AM),
234 UFTDI_DEV(FTDI, CFA_634, 8U232AM),
235 UFTDI_DEV(FTDI, CFA_635, 8U232AM),
236 UFTDI_DEV(FTDI, USB_UIRT, 8U232AM),
237 UFTDI_DEV(FTDI, USBSERIAL, 8U232AM),
238 UFTDI_DEV(FTDI, KBS, 8U232AM),
239 UFTDI_DEV(FTDI, MX2_3, 8U232AM),
240 UFTDI_DEV(FTDI, MX4_5, 8U232AM),
241 UFTDI_DEV(FTDI, LK202, 8U232AM),
242 UFTDI_DEV(FTDI, LK204, 8U232AM),
243 UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13M, 8U232AM),
244 UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13S, 8U232AM),
245 UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13U, 8U232AM),
246 UFTDI_DEV(FTDI, EISCOU, 8U232AM),
247 UFTDI_DEV(FTDI, UOPTBR, 8U232AM),
248 UFTDI_DEV(FTDI, EMCU2D, 8U232AM),
249 UFTDI_DEV(FTDI, PCMSFU, 8U232AM),
250 UFTDI_DEV(FTDI, EMCU2H, 8U232AM),
251 UFTDI_DEV(FTDI, MAXSTREAM, 8U232AM),
252 UFTDI_DEV(FTDI, CTI_USB_NANO_485, 8U232AM),
253 UFTDI_DEV(FTDI, CTI_USB_MINI_485, 8U232AM),
254 UFTDI_DEV(SIIG2, US2308, 8U232AM),
255 UFTDI_DEV(INTREPIDCS, VALUECAN, 8U232AM),
256 UFTDI_DEV(INTREPIDCS, NEOVI, 8U232AM),
257 UFTDI_DEV(BBELECTRONICS, USOTL4, 8U232AM),
258 UFTDI_DEV(MATRIXORBITAL, MOUA, 8U232AM),
259 UFTDI_DEV(MARVELL, SHEEVAPLUG, 8U232AM),
260 UFTDI_DEV(MELCO, PCOPRS1, 8U232AM),
261 UFTDI_DEV(RATOC, REXUSB60F, 8U232AM),
266 uftdi_probe(device_t dev)
268 struct usb_attach_arg *uaa = device_get_ivars(dev);
270 if (uaa->usb_mode != USB_MODE_HOST) {
273 if (uaa->info.bConfigIndex != UFTDI_CONFIG_INDEX) {
276 /* attach to all present interfaces */
278 return (usbd_lookup_id_by_uaa(uftdi_devs, sizeof(uftdi_devs), uaa));
282 uftdi_attach(device_t dev)
284 struct usb_attach_arg *uaa = device_get_ivars(dev);
285 struct uftdi_softc *sc = device_get_softc(dev);
288 sc->sc_udev = uaa->device;
290 sc->sc_unit = device_get_unit(dev);
292 device_set_usb_desc(dev);
293 mtx_init(&sc->sc_mtx, "uftdi", NULL, MTX_DEF);
295 snprintf(sc->sc_name, sizeof(sc->sc_name),
296 "%s", device_get_nameunit(dev));
300 sc->sc_iface_index = uaa->info.bIfaceIndex;
301 sc->sc_type = USB_GET_DRIVER_INFO(uaa);
303 switch (sc->sc_type) {
307 case UFTDI_TYPE_8U232AM:
313 error = usbd_transfer_setup(uaa->device,
314 &sc->sc_iface_index, sc->sc_xfer, uftdi_config,
315 UFTDI_N_TRANSFER, sc, &sc->sc_mtx);
318 device_printf(dev, "allocating USB "
319 "transfers failed\n");
322 sc->sc_ucom.sc_portno = FTDI_PIT_SIOA + uaa->info.bIfaceNum;
324 /* clear stall at first run */
325 mtx_lock(&sc->sc_mtx);
326 usbd_xfer_set_stall(sc->sc_xfer[UFTDI_BULK_DT_WR]);
327 usbd_xfer_set_stall(sc->sc_xfer[UFTDI_BULK_DT_RD]);
328 mtx_unlock(&sc->sc_mtx);
330 /* set a valid "lcr" value */
333 (FTDI_SIO_SET_DATA_STOP_BITS_2 |
334 FTDI_SIO_SET_DATA_PARITY_NONE |
335 FTDI_SIO_SET_DATA_BITS(8));
337 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
338 &uftdi_callback, &sc->sc_mtx);
342 return (0); /* success */
350 uftdi_detach(device_t dev)
352 struct uftdi_softc *sc = device_get_softc(dev);
354 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom, 1);
355 usbd_transfer_unsetup(sc->sc_xfer, UFTDI_N_TRANSFER);
356 mtx_destroy(&sc->sc_mtx);
362 uftdi_cfg_open(struct ucom_softc *ucom)
364 struct uftdi_softc *sc = ucom->sc_parent;
365 uint16_t wIndex = ucom->sc_portno;
366 struct usb_device_request req;
370 /* perform a full reset on the device */
372 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
373 req.bRequest = FTDI_SIO_RESET;
374 USETW(req.wValue, FTDI_SIO_RESET_SIO);
375 USETW(req.wIndex, wIndex);
376 USETW(req.wLength, 0);
377 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
378 &req, NULL, 0, 1000);
380 /* turn on RTS/CTS flow control */
382 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
383 req.bRequest = FTDI_SIO_SET_FLOW_CTRL;
384 USETW(req.wValue, 0);
385 USETW2(req.wIndex, FTDI_SIO_RTS_CTS_HS, wIndex);
386 USETW(req.wLength, 0);
387 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
388 &req, NULL, 0, 1000);
391 * NOTE: with the new UCOM layer there will always be a
392 * "uftdi_cfg_param()" call after "open()", so there is no need for
393 * "open()" to configure anything
398 uftdi_write_callback(struct usb_xfer *xfer, usb_error_t error)
400 struct uftdi_softc *sc = usbd_xfer_softc(xfer);
401 struct usb_page_cache *pc;
405 switch (USB_GET_STATE(xfer)) {
407 case USB_ST_TRANSFERRED:
409 pc = usbd_xfer_get_frame(xfer, 0);
410 if (ucom_get_data(&sc->sc_ucom, pc,
411 sc->sc_hdrlen, UFTDI_OBUFSIZE - sc->sc_hdrlen,
414 if (sc->sc_hdrlen > 0) {
416 FTDI_OUT_TAG(actlen, sc->sc_ucom.sc_portno);
417 usbd_copy_in(pc, 0, buf, 1);
419 usbd_xfer_set_frame_len(xfer, 0, actlen + sc->sc_hdrlen);
420 usbd_transfer_submit(xfer);
425 if (error != USB_ERR_CANCELLED) {
426 /* try to clear stall first */
427 usbd_xfer_set_stall(xfer);
435 uftdi_read_callback(struct usb_xfer *xfer, usb_error_t error)
437 struct uftdi_softc *sc = usbd_xfer_softc(xfer);
438 struct usb_page_cache *pc;
445 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
447 switch (USB_GET_STATE(xfer)) {
448 case USB_ST_TRANSFERRED:
453 pc = usbd_xfer_get_frame(xfer, 0);
454 usbd_copy_out(pc, 0, buf, 2);
456 ftdi_msr = FTDI_GET_MSR(buf);
457 lsr = FTDI_GET_LSR(buf);
460 if (ftdi_msr & FTDI_SIO_CTS_MASK)
462 if (ftdi_msr & FTDI_SIO_DSR_MASK)
464 if (ftdi_msr & FTDI_SIO_RI_MASK)
466 if (ftdi_msr & FTDI_SIO_RLSD_MASK)
469 if ((sc->sc_msr != msr) ||
470 ((sc->sc_lsr & FTDI_LSR_MASK) != (lsr & FTDI_LSR_MASK))) {
471 DPRINTF("status change msr=0x%02x (0x%02x) "
472 "lsr=0x%02x (0x%02x)\n", msr, sc->sc_msr,
478 ucom_status_change(&sc->sc_ucom);
483 ucom_put_data(&sc->sc_ucom, pc, 2, actlen);
487 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
488 usbd_transfer_submit(xfer);
492 if (error != USB_ERR_CANCELLED) {
493 /* try to clear stall first */
494 usbd_xfer_set_stall(xfer);
502 uftdi_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
504 struct uftdi_softc *sc = ucom->sc_parent;
505 uint16_t wIndex = ucom->sc_portno;
507 struct usb_device_request req;
509 wValue = onoff ? FTDI_SIO_SET_DTR_HIGH : FTDI_SIO_SET_DTR_LOW;
511 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
512 req.bRequest = FTDI_SIO_MODEM_CTRL;
513 USETW(req.wValue, wValue);
514 USETW(req.wIndex, wIndex);
515 USETW(req.wLength, 0);
516 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
517 &req, NULL, 0, 1000);
521 uftdi_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
523 struct uftdi_softc *sc = ucom->sc_parent;
524 uint16_t wIndex = ucom->sc_portno;
526 struct usb_device_request req;
528 wValue = onoff ? FTDI_SIO_SET_RTS_HIGH : FTDI_SIO_SET_RTS_LOW;
530 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
531 req.bRequest = FTDI_SIO_MODEM_CTRL;
532 USETW(req.wValue, wValue);
533 USETW(req.wIndex, wIndex);
534 USETW(req.wLength, 0);
535 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
536 &req, NULL, 0, 1000);
540 uftdi_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
542 struct uftdi_softc *sc = ucom->sc_parent;
543 uint16_t wIndex = ucom->sc_portno;
545 struct usb_device_request req;
548 sc->sc_last_lcr |= FTDI_SIO_SET_BREAK;
550 sc->sc_last_lcr &= ~FTDI_SIO_SET_BREAK;
553 wValue = sc->sc_last_lcr;
555 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
556 req.bRequest = FTDI_SIO_SET_DATA;
557 USETW(req.wValue, wValue);
558 USETW(req.wIndex, wIndex);
559 USETW(req.wLength, 0);
560 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
561 &req, NULL, 0, 1000);
565 uftdi_set_parm_soft(struct termios *t,
566 struct uftdi_param_config *cfg, uint8_t type)
568 bzero(cfg, sizeof(*cfg));
572 switch (t->c_ospeed) {
574 cfg->rate = ftdi_sio_b300;
577 cfg->rate = ftdi_sio_b600;
580 cfg->rate = ftdi_sio_b1200;
583 cfg->rate = ftdi_sio_b2400;
586 cfg->rate = ftdi_sio_b4800;
589 cfg->rate = ftdi_sio_b9600;
592 cfg->rate = ftdi_sio_b19200;
595 cfg->rate = ftdi_sio_b38400;
598 cfg->rate = ftdi_sio_b57600;
601 cfg->rate = ftdi_sio_b115200;
608 case UFTDI_TYPE_8U232AM:
609 if (uftdi_8u232am_getrate(t->c_ospeed, &cfg->rate)) {
615 if (t->c_cflag & CSTOPB)
616 cfg->lcr = FTDI_SIO_SET_DATA_STOP_BITS_2;
618 cfg->lcr = FTDI_SIO_SET_DATA_STOP_BITS_1;
620 if (t->c_cflag & PARENB) {
621 if (t->c_cflag & PARODD) {
622 cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_ODD;
624 cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_EVEN;
627 cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_NONE;
630 switch (t->c_cflag & CSIZE) {
632 cfg->lcr |= FTDI_SIO_SET_DATA_BITS(5);
636 cfg->lcr |= FTDI_SIO_SET_DATA_BITS(6);
640 cfg->lcr |= FTDI_SIO_SET_DATA_BITS(7);
644 cfg->lcr |= FTDI_SIO_SET_DATA_BITS(8);
648 if (t->c_cflag & CRTSCTS) {
649 cfg->v_flow = FTDI_SIO_RTS_CTS_HS;
650 } else if (t->c_iflag & (IXON | IXOFF)) {
651 cfg->v_flow = FTDI_SIO_XON_XOFF_HS;
652 cfg->v_start = t->c_cc[VSTART];
653 cfg->v_stop = t->c_cc[VSTOP];
655 cfg->v_flow = FTDI_SIO_DISABLE_FLOW_CTRL;
662 uftdi_pre_param(struct ucom_softc *ucom, struct termios *t)
664 struct uftdi_softc *sc = ucom->sc_parent;
665 struct uftdi_param_config cfg;
669 return (uftdi_set_parm_soft(t, &cfg, sc->sc_type));
673 uftdi_cfg_param(struct ucom_softc *ucom, struct termios *t)
675 struct uftdi_softc *sc = ucom->sc_parent;
676 uint16_t wIndex = ucom->sc_portno;
677 struct uftdi_param_config cfg;
678 struct usb_device_request req;
680 if (uftdi_set_parm_soft(t, &cfg, sc->sc_type)) {
681 /* should not happen */
684 sc->sc_last_lcr = cfg.lcr;
688 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
689 req.bRequest = FTDI_SIO_SET_BAUD_RATE;
690 USETW(req.wValue, cfg.rate);
691 USETW(req.wIndex, wIndex);
692 USETW(req.wLength, 0);
693 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
694 &req, NULL, 0, 1000);
696 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
697 req.bRequest = FTDI_SIO_SET_DATA;
698 USETW(req.wValue, cfg.lcr);
699 USETW(req.wIndex, wIndex);
700 USETW(req.wLength, 0);
701 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
702 &req, NULL, 0, 1000);
704 req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
705 req.bRequest = FTDI_SIO_SET_FLOW_CTRL;
706 USETW2(req.wValue, cfg.v_stop, cfg.v_start);
707 USETW2(req.wIndex, cfg.v_flow, wIndex);
708 USETW(req.wLength, 0);
709 ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
710 &req, NULL, 0, 1000);
714 uftdi_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr)
716 struct uftdi_softc *sc = ucom->sc_parent;
718 DPRINTF("msr=0x%02x lsr=0x%02x\n",
719 sc->sc_msr, sc->sc_lsr);
726 uftdi_start_read(struct ucom_softc *ucom)
728 struct uftdi_softc *sc = ucom->sc_parent;
730 usbd_transfer_start(sc->sc_xfer[UFTDI_BULK_DT_RD]);
734 uftdi_stop_read(struct ucom_softc *ucom)
736 struct uftdi_softc *sc = ucom->sc_parent;
738 usbd_transfer_stop(sc->sc_xfer[UFTDI_BULK_DT_RD]);
742 uftdi_start_write(struct ucom_softc *ucom)
744 struct uftdi_softc *sc = ucom->sc_parent;
746 usbd_transfer_start(sc->sc_xfer[UFTDI_BULK_DT_WR]);
750 uftdi_stop_write(struct ucom_softc *ucom)
752 struct uftdi_softc *sc = ucom->sc_parent;
754 usbd_transfer_stop(sc->sc_xfer[UFTDI_BULK_DT_WR]);
757 /*------------------------------------------------------------------------*
758 * uftdi_8u232am_getrate
763 *------------------------------------------------------------------------*/
765 uftdi_8u232am_getrate(uint32_t speed, uint16_t *rate)
767 /* Table of the nearest even powers-of-2 for values 0..15. */
768 static const uint8_t roundoff[16] = {
769 0, 2, 2, 4, 4, 4, 8, 8,
770 8, 8, 8, 8, 16, 16, 16, 16,
776 if ((speed < 178) || (speed > ((3000000 * 100) / 97)))
777 return (1); /* prevent numerical overflow */
779 /* Special cases for 2M and 3M. */
780 if ((speed >= ((3000000 * 100) / 103)) &&
781 (speed <= ((3000000 * 100) / 97))) {
785 if ((speed >= ((2000000 * 100) / 103)) &&
786 (speed <= ((2000000 * 100) / 97))) {
790 d = (FTDI_8U232AM_FREQ << 4) / speed;
791 d = (d & ~15) + roundoff[d & 15];
793 if (d < FTDI_8U232AM_MIN_DIV)
794 d = FTDI_8U232AM_MIN_DIV;
795 else if (d > FTDI_8U232AM_MAX_DIV)
796 d = FTDI_8U232AM_MAX_DIV;
799 * Calculate the frequency needed for "d" to exactly divide down to
800 * our target "speed", and check that the actual frequency is within
804 if ((freq < ((FTDI_8U232AM_FREQ * 1600ULL) / 103)) ||
805 (freq > ((FTDI_8U232AM_FREQ * 1600ULL) / 97)))
809 * Pack the divisor into the resultant value. The lower 14-bits
810 * hold the integral part, while the upper 2 bits encode the
811 * fractional component: either 0, 0.5, 0.25, or 0.125.
827 uftdi_poll(struct ucom_softc *ucom)
829 struct uftdi_softc *sc = ucom->sc_parent;
830 usbd_transfer_poll(sc->sc_xfer, UFTDI_N_TRANSFER);