/* $NetBSD: uftdi.c,v 1.13 2002/09/23 05:51:23 simonb Exp $ */ /*- * Copyright (c) 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Lennart Augustsson (lennart@augustsson.net). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * NOTE: all function names beginning like "uftdi_cfg_" can only * be called from within the config thread function ! */ /* * FTDI FT8U100AX serial adapter driver */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "usbdevs.h" #define USB_DEBUG_VAR uftdi_debug #include #include #include #include #ifdef USB_DEBUG static int uftdi_debug = 0; static SYSCTL_NODE(_hw_usb, OID_AUTO, uftdi, CTLFLAG_RW, 0, "USB uftdi"); SYSCTL_INT(_hw_usb_uftdi, OID_AUTO, debug, CTLFLAG_RW, &uftdi_debug, 0, "Debug level"); TUNABLE_INT("hw.usb.uftdi.debug", &uftdi_debug); #endif #define UFTDI_CONFIG_INDEX 0 #define UFTDI_IFACE_INDEX 0 #define UFTDI_OBUFSIZE 64 /* bytes, cannot be increased due to * do size encoding */ enum { UFTDI_BULK_DT_WR, UFTDI_BULK_DT_RD, UFTDI_N_TRANSFER, }; struct uftdi_softc { struct ucom_super_softc sc_super_ucom; struct ucom_softc sc_ucom; struct usb_device *sc_udev; struct usb_xfer *sc_xfer[UFTDI_N_TRANSFER]; device_t sc_dev; struct lock sc_lock; uint32_t sc_unit; enum uftdi_type sc_type; uint16_t sc_last_lcr; uint8_t sc_iface_index; uint8_t sc_hdrlen; uint8_t sc_msr; uint8_t sc_lsr; uint8_t sc_name[16]; }; struct uftdi_param_config { uint16_t rate; uint16_t lcr; uint8_t v_start; uint8_t v_stop; uint8_t v_flow; }; /* prototypes */ static device_probe_t uftdi_probe; static device_attach_t uftdi_attach; static device_detach_t uftdi_detach; static usb_callback_t uftdi_write_callback; static usb_callback_t uftdi_read_callback; static void uftdi_cfg_open(struct ucom_softc *); static void uftdi_cfg_set_dtr(struct ucom_softc *, uint8_t); static void uftdi_cfg_set_rts(struct ucom_softc *, uint8_t); static void uftdi_cfg_set_break(struct ucom_softc *, uint8_t); static int uftdi_set_parm_soft(struct termios *, struct uftdi_param_config *, uint8_t); static int uftdi_pre_param(struct ucom_softc *, struct termios *); static void uftdi_cfg_param(struct ucom_softc *, struct termios *); static void uftdi_cfg_get_status(struct ucom_softc *, uint8_t *, uint8_t *); static void uftdi_start_read(struct ucom_softc *); static void uftdi_stop_read(struct ucom_softc *); static void uftdi_start_write(struct ucom_softc *); static void uftdi_stop_write(struct ucom_softc *); static uint8_t uftdi_8u232am_getrate(uint32_t, uint16_t *); static void uftdi_poll(struct ucom_softc *ucom); static const struct usb_config uftdi_config[UFTDI_N_TRANSFER] = { [UFTDI_BULK_DT_WR] = { .type = UE_BULK, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_OUT, .bufsize = UFTDI_OBUFSIZE, .flags = {.pipe_bof = 1,}, .callback = &uftdi_write_callback, }, [UFTDI_BULK_DT_RD] = { .type = UE_BULK, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_IN, .bufsize = 0, /* use wMaxPacketSize */ .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, .callback = &uftdi_read_callback, }, }; static const struct ucom_callback uftdi_callback = { .ucom_cfg_get_status = &uftdi_cfg_get_status, .ucom_cfg_set_dtr = &uftdi_cfg_set_dtr, .ucom_cfg_set_rts = &uftdi_cfg_set_rts, .ucom_cfg_set_break = &uftdi_cfg_set_break, .ucom_cfg_param = &uftdi_cfg_param, .ucom_cfg_open = &uftdi_cfg_open, .ucom_pre_param = &uftdi_pre_param, .ucom_start_read = &uftdi_start_read, .ucom_stop_read = &uftdi_stop_read, .ucom_start_write = &uftdi_start_write, .ucom_stop_write = &uftdi_stop_write, .ucom_poll = &uftdi_poll, }; static device_method_t uftdi_methods[] = { /* Device interface */ DEVMETHOD(device_probe, uftdi_probe), DEVMETHOD(device_attach, uftdi_attach), DEVMETHOD(device_detach, uftdi_detach), DEVMETHOD_END }; static devclass_t uftdi_devclass; static driver_t uftdi_driver = { .name = "uftdi", .methods = uftdi_methods, .size = sizeof(struct uftdi_softc), }; DRIVER_MODULE(uftdi, uhub, uftdi_driver, uftdi_devclass, NULL, NULL); MODULE_DEPEND(uftdi, ucom, 1, 1, 1); MODULE_DEPEND(uftdi, usb, 1, 1, 1); MODULE_VERSION(uftdi, 1); static const STRUCT_USB_HOST_ID uftdi_devs[] = { #define UFTDI_DEV(v,p,t) \ { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, UFTDI_TYPE_##t) } UFTDI_DEV(ATMEL, STK541, 8U232AM), UFTDI_DEV(DRESDENELEKTRONIK, SENSORTERMINALBOARD, 8U232AM), UFTDI_DEV(DRESDENELEKTRONIK, WIRELESSHANDHELDTERMINAL, 8U232AM), UFTDI_DEV(FALCOM, TWIST, 8U232AM), UFTDI_DEV(FTDI, GAMMASCOUT, 8U232AM), UFTDI_DEV(FTDI, SERIAL_8U100AX, SIO), UFTDI_DEV(FTDI, SERIAL_2232C, 8U232AM), UFTDI_DEV(FTDI, SERIAL_2232D, 8U232AM), UFTDI_DEV(FTDI, BEAGLEBONE, 8U232AM), UFTDI_DEV(FTDI, SERIAL_4232H, 8U232AM), UFTDI_DEV(FTDI, SERIAL_8U232AM, 8U232AM), UFTDI_DEV(FTDI, SERIAL_8U232AM4, 8U232AM), UFTDI_DEV(FTDI, SEMC_DSS20, 8U232AM), UFTDI_DEV(FTDI, CFA_631, 8U232AM), UFTDI_DEV(FTDI, CFA_632, 8U232AM), UFTDI_DEV(FTDI, CFA_633, 8U232AM), UFTDI_DEV(FTDI, CFA_634, 8U232AM), UFTDI_DEV(FTDI, CFA_635, 8U232AM), UFTDI_DEV(FTDI, USB_UIRT, 8U232AM), UFTDI_DEV(FTDI, USBSERIAL, 8U232AM), UFTDI_DEV(FTDI, KBS, 8U232AM), UFTDI_DEV(FTDI, MX2_3, 8U232AM), UFTDI_DEV(FTDI, MX4_5, 8U232AM), UFTDI_DEV(FTDI, LK202, 8U232AM), UFTDI_DEV(FTDI, LK204, 8U232AM), UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13M, 8U232AM), UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13S, 8U232AM), UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13U, 8U232AM), UFTDI_DEV(FTDI, EISCOU, 8U232AM), UFTDI_DEV(FTDI, UOPTBR, 8U232AM), UFTDI_DEV(FTDI, EMCU2D, 8U232AM), UFTDI_DEV(FTDI, PCMSFU, 8U232AM), UFTDI_DEV(FTDI, EMCU2H, 8U232AM), UFTDI_DEV(FTDI, MAXSTREAM, 8U232AM), UFTDI_DEV(FTDI, CTI_USB_NANO_485, 8U232AM), UFTDI_DEV(FTDI, CTI_USB_MINI_485, 8U232AM), UFTDI_DEV(SIIG2, US2308, 8U232AM), UFTDI_DEV(INTREPIDCS, VALUECAN, 8U232AM), UFTDI_DEV(INTREPIDCS, NEOVI, 8U232AM), UFTDI_DEV(BBELECTRONICS, USOTL4, 8U232AM), UFTDI_DEV(MATRIXORBITAL, MOUA, 8U232AM), UFTDI_DEV(MARVELL, SHEEVAPLUG, 8U232AM), UFTDI_DEV(MELCO, PCOPRS1, 8U232AM), UFTDI_DEV(RATOC, REXUSB60F, 8U232AM), #undef UFTDI_DEV }; static int uftdi_probe(device_t dev) { struct usb_attach_arg *uaa = device_get_ivars(dev); if (uaa->usb_mode != USB_MODE_HOST) { return (ENXIO); } if (uaa->info.bConfigIndex != UFTDI_CONFIG_INDEX) { return (ENXIO); } /* attach to all present interfaces */ return (usbd_lookup_id_by_uaa(uftdi_devs, sizeof(uftdi_devs), uaa)); } static int uftdi_attach(device_t dev) { struct usb_attach_arg *uaa = device_get_ivars(dev); struct uftdi_softc *sc = device_get_softc(dev); int error; sc->sc_udev = uaa->device; sc->sc_dev = dev; sc->sc_unit = device_get_unit(dev); device_set_usb_desc(dev); lockinit(&sc->sc_lock, "uftdi", 0, LK_CANRECURSE); ksnprintf(sc->sc_name, sizeof(sc->sc_name), "%s", device_get_nameunit(dev)); DPRINTF("\n"); sc->sc_iface_index = uaa->info.bIfaceIndex; sc->sc_type = USB_GET_DRIVER_INFO(uaa); switch (sc->sc_type) { case UFTDI_TYPE_SIO: sc->sc_hdrlen = 1; break; case UFTDI_TYPE_8U232AM: default: sc->sc_hdrlen = 0; break; } error = usbd_transfer_setup(uaa->device, &sc->sc_iface_index, sc->sc_xfer, uftdi_config, UFTDI_N_TRANSFER, sc, &sc->sc_lock); if (error) { device_printf(dev, "allocating USB " "transfers failed\n"); goto detach; } sc->sc_ucom.sc_portno = FTDI_PIT_SIOA + uaa->info.bIfaceNum; /* clear stall at first run */ lockmgr(&sc->sc_lock, LK_EXCLUSIVE); usbd_xfer_set_stall(sc->sc_xfer[UFTDI_BULK_DT_WR]); usbd_xfer_set_stall(sc->sc_xfer[UFTDI_BULK_DT_RD]); lockmgr(&sc->sc_lock, LK_RELEASE); /* set a valid "lcr" value */ sc->sc_last_lcr = (FTDI_SIO_SET_DATA_STOP_BITS_2 | FTDI_SIO_SET_DATA_PARITY_NONE | FTDI_SIO_SET_DATA_BITS(8)); error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc, &uftdi_callback, &sc->sc_lock); if (error) { goto detach; } ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); return (0); /* success */ detach: uftdi_detach(dev); return (ENXIO); } static int uftdi_detach(device_t dev) { struct uftdi_softc *sc = device_get_softc(dev); ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom); usbd_transfer_unsetup(sc->sc_xfer, UFTDI_N_TRANSFER); lockuninit(&sc->sc_lock); return (0); } static void uftdi_cfg_open(struct ucom_softc *ucom) { struct uftdi_softc *sc = ucom->sc_parent; uint16_t wIndex = ucom->sc_portno; struct usb_device_request req; DPRINTF(""); /* perform a full reset on the device */ req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = FTDI_SIO_RESET; USETW(req.wValue, FTDI_SIO_RESET_SIO); USETW(req.wIndex, wIndex); USETW(req.wLength, 0); ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, &req, NULL, 0, 1000); /* turn on RTS/CTS flow control */ req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = FTDI_SIO_SET_FLOW_CTRL; USETW(req.wValue, 0); USETW2(req.wIndex, FTDI_SIO_RTS_CTS_HS, wIndex); USETW(req.wLength, 0); ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, &req, NULL, 0, 1000); /* * NOTE: with the new UCOM layer there will always be a * "uftdi_cfg_param()" call after "open()", so there is no need for * "open()" to configure anything */ } static void uftdi_write_callback(struct usb_xfer *xfer, usb_error_t error) { struct uftdi_softc *sc = usbd_xfer_softc(xfer); struct usb_page_cache *pc; uint32_t actlen; uint8_t buf[1]; switch (USB_GET_STATE(xfer)) { case USB_ST_SETUP: case USB_ST_TRANSFERRED: tr_setup: pc = usbd_xfer_get_frame(xfer, 0); if (ucom_get_data(&sc->sc_ucom, pc, sc->sc_hdrlen, UFTDI_OBUFSIZE - sc->sc_hdrlen, &actlen)) { if (sc->sc_hdrlen > 0) { buf[0] = FTDI_OUT_TAG(actlen, sc->sc_ucom.sc_portno); usbd_copy_in(pc, 0, buf, 1); } usbd_xfer_set_frame_len(xfer, 0, actlen + sc->sc_hdrlen); usbd_transfer_submit(xfer); } return; default: /* Error */ if (error != USB_ERR_CANCELLED) { /* try to clear stall first */ usbd_xfer_set_stall(xfer); goto tr_setup; } return; } } static void uftdi_read_callback(struct usb_xfer *xfer, usb_error_t error) { struct uftdi_softc *sc = usbd_xfer_softc(xfer); struct usb_page_cache *pc; uint8_t buf[2]; uint8_t ftdi_msr; uint8_t msr; uint8_t lsr; int actlen; usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); switch (USB_GET_STATE(xfer)) { case USB_ST_TRANSFERRED: if (actlen < 2) { goto tr_setup; } pc = usbd_xfer_get_frame(xfer, 0); usbd_copy_out(pc, 0, buf, 2); ftdi_msr = FTDI_GET_MSR(buf); lsr = FTDI_GET_LSR(buf); msr = 0; if (ftdi_msr & FTDI_SIO_CTS_MASK) msr |= SER_CTS; if (ftdi_msr & FTDI_SIO_DSR_MASK) msr |= SER_DSR; if (ftdi_msr & FTDI_SIO_RI_MASK) msr |= SER_RI; if (ftdi_msr & FTDI_SIO_RLSD_MASK) msr |= SER_DCD; if ((sc->sc_msr != msr) || ((sc->sc_lsr & FTDI_LSR_MASK) != (lsr & FTDI_LSR_MASK))) { DPRINTF("status change msr=0x%02x (0x%02x) " "lsr=0x%02x (0x%02x)\n", msr, sc->sc_msr, lsr, sc->sc_lsr); sc->sc_msr = msr; sc->sc_lsr = lsr; ucom_status_change(&sc->sc_ucom); } actlen -= 2; if (actlen > 0) { ucom_put_data(&sc->sc_ucom, pc, 2, actlen); } case USB_ST_SETUP: tr_setup: usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); usbd_transfer_submit(xfer); return; default: /* Error */ if (error != USB_ERR_CANCELLED) { /* try to clear stall first */ usbd_xfer_set_stall(xfer); goto tr_setup; } return; } } static void uftdi_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff) { struct uftdi_softc *sc = ucom->sc_parent; uint16_t wIndex = ucom->sc_portno; uint16_t wValue; struct usb_device_request req; wValue = onoff ? FTDI_SIO_SET_DTR_HIGH : FTDI_SIO_SET_DTR_LOW; req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = FTDI_SIO_MODEM_CTRL; USETW(req.wValue, wValue); USETW(req.wIndex, wIndex); USETW(req.wLength, 0); ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, &req, NULL, 0, 1000); } static void uftdi_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff) { struct uftdi_softc *sc = ucom->sc_parent; uint16_t wIndex = ucom->sc_portno; uint16_t wValue; struct usb_device_request req; wValue = onoff ? FTDI_SIO_SET_RTS_HIGH : FTDI_SIO_SET_RTS_LOW; req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = FTDI_SIO_MODEM_CTRL; USETW(req.wValue, wValue); USETW(req.wIndex, wIndex); USETW(req.wLength, 0); ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, &req, NULL, 0, 1000); } static void uftdi_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff) { struct uftdi_softc *sc = ucom->sc_parent; uint16_t wIndex = ucom->sc_portno; uint16_t wValue; struct usb_device_request req; if (onoff) { sc->sc_last_lcr |= FTDI_SIO_SET_BREAK; } else { sc->sc_last_lcr &= ~FTDI_SIO_SET_BREAK; } wValue = sc->sc_last_lcr; req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = FTDI_SIO_SET_DATA; USETW(req.wValue, wValue); USETW(req.wIndex, wIndex); USETW(req.wLength, 0); ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, &req, NULL, 0, 1000); } static int uftdi_set_parm_soft(struct termios *t, struct uftdi_param_config *cfg, uint8_t type) { memset(cfg, 0, sizeof(*cfg)); switch (type) { case UFTDI_TYPE_SIO: switch (t->c_ospeed) { case 300: cfg->rate = ftdi_sio_b300; break; case 600: cfg->rate = ftdi_sio_b600; break; case 1200: cfg->rate = ftdi_sio_b1200; break; case 2400: cfg->rate = ftdi_sio_b2400; break; case 4800: cfg->rate = ftdi_sio_b4800; break; case 9600: cfg->rate = ftdi_sio_b9600; break; case 19200: cfg->rate = ftdi_sio_b19200; break; case 38400: cfg->rate = ftdi_sio_b38400; break; case 57600: cfg->rate = ftdi_sio_b57600; break; case 115200: cfg->rate = ftdi_sio_b115200; break; default: return (EINVAL); } break; case UFTDI_TYPE_8U232AM: if (uftdi_8u232am_getrate(t->c_ospeed, &cfg->rate)) { return (EINVAL); } break; } if (t->c_cflag & CSTOPB) cfg->lcr = FTDI_SIO_SET_DATA_STOP_BITS_2; else cfg->lcr = FTDI_SIO_SET_DATA_STOP_BITS_1; if (t->c_cflag & PARENB) { if (t->c_cflag & PARODD) { cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_ODD; } else { cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_EVEN; } } else { cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_NONE; } switch (t->c_cflag & CSIZE) { case CS5: cfg->lcr |= FTDI_SIO_SET_DATA_BITS(5); break; case CS6: cfg->lcr |= FTDI_SIO_SET_DATA_BITS(6); break; case CS7: cfg->lcr |= FTDI_SIO_SET_DATA_BITS(7); break; case CS8: cfg->lcr |= FTDI_SIO_SET_DATA_BITS(8); break; } if (t->c_cflag & CRTSCTS) { cfg->v_flow = FTDI_SIO_RTS_CTS_HS; } else if (t->c_iflag & (IXON | IXOFF)) { cfg->v_flow = FTDI_SIO_XON_XOFF_HS; cfg->v_start = t->c_cc[VSTART]; cfg->v_stop = t->c_cc[VSTOP]; } else { cfg->v_flow = FTDI_SIO_DISABLE_FLOW_CTRL; } return (0); } static int uftdi_pre_param(struct ucom_softc *ucom, struct termios *t) { struct uftdi_softc *sc = ucom->sc_parent; struct uftdi_param_config cfg; DPRINTF("\n"); return (uftdi_set_parm_soft(t, &cfg, sc->sc_type)); } static void uftdi_cfg_param(struct ucom_softc *ucom, struct termios *t) { struct uftdi_softc *sc = ucom->sc_parent; uint16_t wIndex = ucom->sc_portno; struct uftdi_param_config cfg; struct usb_device_request req; if (uftdi_set_parm_soft(t, &cfg, sc->sc_type)) { /* should not happen */ return; } sc->sc_last_lcr = cfg.lcr; DPRINTF("\n"); req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = FTDI_SIO_SET_BAUD_RATE; USETW(req.wValue, cfg.rate); USETW(req.wIndex, wIndex); USETW(req.wLength, 0); ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, &req, NULL, 0, 1000); req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = FTDI_SIO_SET_DATA; USETW(req.wValue, cfg.lcr); USETW(req.wIndex, wIndex); USETW(req.wLength, 0); ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, &req, NULL, 0, 1000); req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = FTDI_SIO_SET_FLOW_CTRL; USETW2(req.wValue, cfg.v_stop, cfg.v_start); USETW2(req.wIndex, cfg.v_flow, wIndex); USETW(req.wLength, 0); ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, &req, NULL, 0, 1000); } static void uftdi_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) { struct uftdi_softc *sc = ucom->sc_parent; DPRINTF("msr=0x%02x lsr=0x%02x\n", sc->sc_msr, sc->sc_lsr); *msr = sc->sc_msr; *lsr = sc->sc_lsr; } static void uftdi_start_read(struct ucom_softc *ucom) { struct uftdi_softc *sc = ucom->sc_parent; usbd_transfer_start(sc->sc_xfer[UFTDI_BULK_DT_RD]); } static void uftdi_stop_read(struct ucom_softc *ucom) { struct uftdi_softc *sc = ucom->sc_parent; usbd_transfer_stop(sc->sc_xfer[UFTDI_BULK_DT_RD]); } static void uftdi_start_write(struct ucom_softc *ucom) { struct uftdi_softc *sc = ucom->sc_parent; usbd_transfer_start(sc->sc_xfer[UFTDI_BULK_DT_WR]); } static void uftdi_stop_write(struct ucom_softc *ucom) { struct uftdi_softc *sc = ucom->sc_parent; usbd_transfer_stop(sc->sc_xfer[UFTDI_BULK_DT_WR]); } /*------------------------------------------------------------------------* * uftdi_8u232am_getrate * * Return values: * 0: Success * Else: Failure *------------------------------------------------------------------------*/ static uint8_t uftdi_8u232am_getrate(uint32_t speed, uint16_t *rate) { /* Table of the nearest even powers-of-2 for values 0..15. */ static const uint8_t roundoff[16] = { 0, 2, 2, 4, 4, 4, 8, 8, 8, 8, 8, 8, 16, 16, 16, 16, }; uint32_t d; uint32_t freq; uint16_t result; if ((speed < 178) || (speed > ((3000000 * 100) / 97))) return (1); /* prevent numerical overflow */ /* Special cases for 2M and 3M. */ if ((speed >= ((3000000 * 100) / 103)) && (speed <= ((3000000 * 100) / 97))) { result = 0; goto done; } if ((speed >= ((2000000 * 100) / 103)) && (speed <= ((2000000 * 100) / 97))) { result = 1; goto done; } d = (FTDI_8U232AM_FREQ << 4) / speed; d = (d & ~15) + roundoff[d & 15]; if (d < FTDI_8U232AM_MIN_DIV) d = FTDI_8U232AM_MIN_DIV; else if (d > FTDI_8U232AM_MAX_DIV) d = FTDI_8U232AM_MAX_DIV; /* * Calculate the frequency needed for "d" to exactly divide down to * our target "speed", and check that the actual frequency is within * 3% of this. */ freq = (speed * d); if ((freq < ((FTDI_8U232AM_FREQ * 1600ULL) / 103)) || (freq > ((FTDI_8U232AM_FREQ * 1600ULL) / 97))) return (1); /* * Pack the divisor into the resultant value. The lower 14-bits * hold the integral part, while the upper 2 bits encode the * fractional component: either 0, 0.5, 0.25, or 0.125. */ result = (d >> 4); if (d & 8) result |= 0x4000; else if (d & 4) result |= 0x8000; else if (d & 2) result |= 0xc000; done: *rate = result; return (0); } static void uftdi_poll(struct ucom_softc *ucom) { struct uftdi_softc *sc = ucom->sc_parent; usbd_transfer_poll(sc->sc_xfer, UFTDI_N_TRANSFER); }