/* $NetBSD: uchcom.c,v 1.40 2021/08/07 16:19:17 thorpej Exp $ */ /* * Copyright (c) 2007 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Takuya SHIOZAKI (tshiozak@netbsd.org). * * 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. */ #include __KERNEL_RCSID(0, "$NetBSD: uchcom.c,v 1.40 2021/08/07 16:19:17 thorpej Exp $"); #ifdef _KERNEL_OPT #include "opt_usb.h" #endif /* * driver for WinChipHead CH341/340, the worst USB-serial chip in the world. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef UCHCOM_DEBUG #define DPRINTFN(n, x) if (uchcomdebug > (n)) printf x int uchcomdebug = 0; #else #define DPRINTFN(n, x) #endif #define DPRINTF(x) DPRINTFN(0, x) #define UCHCOM_IFACE_INDEX 0 #define UCHCOM_CONFIG_INDEX 0 #define UCHCOM_INPUT_BUF_SIZE 8 #define UCHCOM_REQ_GET_VERSION 0x5F #define UCHCOM_REQ_READ_REG 0x95 #define UCHCOM_REQ_WRITE_REG 0x9A #define UCHCOM_REQ_RESET 0xA1 #define UCHCOM_REQ_SET_DTRRTS 0xA4 #define UCHCOM_REG_STAT1 0x06 #define UCHCOM_REG_STAT2 0x07 #define UCHCOM_REG_BPS_PRE 0x12 #define UCHCOM_REG_BPS_DIV 0x13 #define UCHCOM_REG_BREAK 0x05 #define UCHCOM_REG_LCR 0x18 #define UCHCOM_REG_LCR2 0x25 #define UCHCOM_VER_20 0x20 #define UCHCOM_VER_30 0x30 #define UCHCOM_BPS_PRE_IMM 0x80 /* CH341: immediate RX forwarding */ #define UCHCOM_DTR_MASK 0x20 #define UCHCOM_RTS_MASK 0x40 #define UCHCOM_BREAK_MASK 0x01 #define UCHCOM_LCR_CS5 0x00 #define UCHCOM_LCR_CS6 0x01 #define UCHCOM_LCR_CS7 0x02 #define UCHCOM_LCR_CS8 0x03 #define UCHCOM_LCR_STOPB 0x04 #define UCHCOM_LCR_PARENB 0x08 #define UCHCOM_LCR_PARODD 0x00 #define UCHCOM_LCR_PAREVEN 0x10 #define UCHCOM_LCR_PARMARK 0x20 #define UCHCOM_LCR_PARSPACE 0x30 #define UCHCOM_LCR_TXE 0x40 #define UCHCOM_LCR_RXE 0x80 #define UCHCOM_INTR_STAT1 0x02 #define UCHCOM_INTR_STAT2 0x03 #define UCHCOM_INTR_LEAST 4 #define UCHCOMIBUFSIZE 256 #define UCHCOMOBUFSIZE 256 struct uchcom_softc { device_t sc_dev; struct usbd_device * sc_udev; device_t sc_subdev; struct usbd_interface * sc_iface; bool sc_dying; /* */ int sc_intr_endpoint; int sc_intr_size; struct usbd_pipe * sc_intr_pipe; u_char *sc_intr_buf; /* */ uint8_t sc_version; int sc_dtr; int sc_rts; u_char sc_lsr; u_char sc_msr; }; struct uchcom_endpoints { int ep_bulkin; int ep_bulkout; int ep_intr; int ep_intr_size; }; struct uchcom_divider { uint8_t dv_prescaler; uint8_t dv_div; }; /* 0,1,2,3,7 are prescale factors for given 4x 12000000 clock formula */ static const uint32_t rates4x[8] = { [0] = 4 * 12000000 / 1024, [1] = 4 * 12000000 / 128, [2] = 4 * 12000000 / 16, [3] = 4 * 12000000 / 2, [7] = 4 * 12000000, }; static const struct usb_devno uchcom_devs[] = { { USB_VENDOR_QINHENG2, USB_PRODUCT_QINHENG2_CH341SER }, { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH340 }, { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH341_ASP }, }; #define uchcom_lookup(v, p) usb_lookup(uchcom_devs, v, p) static void uchcom_get_status(void *, int, u_char *, u_char *); static void uchcom_set(void *, int, int, int); static int uchcom_param(void *, int, struct termios *); static int uchcom_open(void *, int); static void uchcom_close(void *, int); static void uchcom_intr(struct usbd_xfer *, void *, usbd_status); static int set_config(struct uchcom_softc *); static int find_ifaces(struct uchcom_softc *, struct usbd_interface **); static int find_endpoints(struct uchcom_softc *, struct uchcom_endpoints *); static void close_intr_pipe(struct uchcom_softc *); static const struct ucom_methods uchcom_methods = { .ucom_get_status = uchcom_get_status, .ucom_set = uchcom_set, .ucom_param = uchcom_param, .ucom_open = uchcom_open, .ucom_close = uchcom_close, }; static int uchcom_match(device_t, cfdata_t, void *); static void uchcom_attach(device_t, device_t, void *); static void uchcom_childdet(device_t, device_t); static int uchcom_detach(device_t, int); CFATTACH_DECL2_NEW(uchcom, sizeof(struct uchcom_softc), uchcom_match, uchcom_attach, uchcom_detach, NULL, NULL, uchcom_childdet); /* ---------------------------------------------------------------------- * driver entry points */ static int uchcom_match(device_t parent, cfdata_t match, void *aux) { struct usb_attach_arg *uaa = aux; return (uchcom_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ? UMATCH_VENDOR_PRODUCT : UMATCH_NONE); } static void uchcom_attach(device_t parent, device_t self, void *aux) { struct uchcom_softc *sc = device_private(self); struct usb_attach_arg *uaa = aux; struct usbd_device *dev = uaa->uaa_device; char *devinfop; struct uchcom_endpoints endpoints; struct ucom_attach_args ucaa; aprint_naive("\n"); aprint_normal("\n"); devinfop = usbd_devinfo_alloc(dev, 0); aprint_normal_dev(self, "%s\n", devinfop); usbd_devinfo_free(devinfop); sc->sc_dev = self; sc->sc_udev = dev; sc->sc_dying = false; sc->sc_dtr = sc->sc_rts = -1; sc->sc_lsr = sc->sc_msr = 0; DPRINTF(("\n\nuchcom attach: sc=%p\n", sc)); if (set_config(sc)) goto failed; if (find_ifaces(sc, &sc->sc_iface)) goto failed; if (find_endpoints(sc, &endpoints)) goto failed; sc->sc_intr_endpoint = endpoints.ep_intr; sc->sc_intr_size = endpoints.ep_intr_size; /* setup ucom layer */ ucaa.ucaa_portno = UCOM_UNK_PORTNO; ucaa.ucaa_bulkin = endpoints.ep_bulkin; ucaa.ucaa_bulkout = endpoints.ep_bulkout; ucaa.ucaa_ibufsize = UCHCOMIBUFSIZE; ucaa.ucaa_obufsize = UCHCOMOBUFSIZE; ucaa.ucaa_ibufsizepad = UCHCOMIBUFSIZE; ucaa.ucaa_opkthdrlen = 0; ucaa.ucaa_device = dev; ucaa.ucaa_iface = sc->sc_iface; ucaa.ucaa_methods = &uchcom_methods; ucaa.ucaa_arg = sc; ucaa.ucaa_info = NULL; usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); sc->sc_subdev = config_found(self, &ucaa, ucomprint, CFARGS(.submatch = ucomsubmatch)); return; failed: sc->sc_dying = true; return; } static void uchcom_childdet(device_t self, device_t child) { struct uchcom_softc *sc = device_private(self); KASSERT(sc->sc_subdev == child); sc->sc_subdev = NULL; } static int uchcom_detach(device_t self, int flags) { struct uchcom_softc *sc = device_private(self); int rv = 0; DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); close_intr_pipe(sc); sc->sc_dying = true; if (sc->sc_subdev != NULL) { rv = config_detach(sc->sc_subdev, flags); sc->sc_subdev = NULL; } usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); return rv; } static int set_config(struct uchcom_softc *sc) { usbd_status err; err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); if (err) { aprint_error_dev(sc->sc_dev, "failed to set configuration: %s\n", usbd_errstr(err)); return -1; } return 0; } static int find_ifaces(struct uchcom_softc *sc, struct usbd_interface **riface) { usbd_status err; err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, riface); if (err) { aprint_error("\n%s: failed to get interface: %s\n", device_xname(sc->sc_dev), usbd_errstr(err)); return -1; } return 0; } static int find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) { int i, bin=-1, bout=-1, intr=-1, isize=0; usb_interface_descriptor_t *id; usb_endpoint_descriptor_t *ed; id = usbd_get_interface_descriptor(sc->sc_iface); for (i = 0; i < id->bNumEndpoints; i++) { ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); if (ed == NULL) { aprint_error_dev(sc->sc_dev, "no endpoint descriptor for %d\n", i); return -1; } if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { intr = ed->bEndpointAddress; isize = UGETW(ed->wMaxPacketSize); } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { bin = ed->bEndpointAddress; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { bout = ed->bEndpointAddress; } } if (intr == -1 || bin == -1 || bout == -1) { if (intr == -1) { aprint_error_dev(sc->sc_dev, "no interrupt end point\n"); } if (bin == -1) { aprint_error_dev(sc->sc_dev, "no data bulk in end point\n"); } if (bout == -1) { aprint_error_dev(sc->sc_dev, "no data bulk out end point\n"); } return -1; } if (isize < UCHCOM_INTR_LEAST) { aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); return -1; } DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", device_xname(sc->sc_dev), bin, bout, intr, isize)); endpoints->ep_intr = intr; endpoints->ep_intr_size = isize; endpoints->ep_bulkin = bin; endpoints->ep_bulkout = bout; return 0; } /* ---------------------------------------------------------------------- * low level i/o */ static __inline usbd_status generic_control_out(struct uchcom_softc *sc, uint8_t reqno, uint16_t value, uint16_t index) { usb_device_request_t req; req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = reqno; USETW(req.wValue, value); USETW(req.wIndex, index); USETW(req.wLength, 0); return usbd_do_request(sc->sc_udev, &req, 0); } static __inline usbd_status generic_control_in(struct uchcom_softc *sc, uint8_t reqno, uint16_t value, uint16_t index, void *buf, int buflen, int *actlen) { usb_device_request_t req; req.bmRequestType = UT_READ_VENDOR_DEVICE; req.bRequest = reqno; USETW(req.wValue, value); USETW(req.wIndex, index); USETW(req.wLength, (uint16_t)buflen); return usbd_do_request_flags(sc->sc_udev, &req, buf, USBD_SHORT_XFER_OK, actlen, USBD_DEFAULT_TIMEOUT); } static __inline usbd_status write_reg(struct uchcom_softc *sc, uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) { DPRINTF(("%s: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", device_xname(sc->sc_dev), (unsigned)reg1, (unsigned)val1, (unsigned)reg2, (unsigned)val2)); return generic_control_out( sc, UCHCOM_REQ_WRITE_REG, reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); } static __inline usbd_status read_reg(struct uchcom_softc *sc, uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) { uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; usbd_status err; int actin; err = generic_control_in( sc, UCHCOM_REQ_READ_REG, reg1|((uint16_t)reg2<<8), 0, buf, sizeof(buf), &actin); if (err) return err; DPRINTF(("%s: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", device_xname(sc->sc_dev), (unsigned)reg1, (unsigned)buf[0], (unsigned)reg2, (unsigned)buf[1])); if (rval1) *rval1 = buf[0]; if (rval2) *rval2 = buf[1]; return USBD_NORMAL_COMPLETION; } static __inline usbd_status get_version(struct uchcom_softc *sc, uint8_t *rver) { uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; usbd_status err; int actin; err = generic_control_in( sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf), &actin); if (err) return err; if (rver) *rver = buf[0]; return USBD_NORMAL_COMPLETION; } static __inline usbd_status get_status(struct uchcom_softc *sc, uint8_t *rval) { return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); } static __inline usbd_status set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) { return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); } static __inline usbd_status set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) { return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); } /* ---------------------------------------------------------------------- * middle layer */ static int update_version(struct uchcom_softc *sc) { usbd_status err; err = get_version(sc, &sc->sc_version); if (err) { device_printf(sc->sc_dev, "cannot get version: %s\n", usbd_errstr(err)); return EIO; } DPRINTF(("%s: update_version %d\n", device_xname(sc->sc_dev), sc->sc_version)); return 0; } static void convert_status(struct uchcom_softc *sc, uint8_t cur) { sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); sc->sc_rts = !(cur & UCHCOM_RTS_MASK); cur = ~cur & 0x0F; sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); } static int update_status(struct uchcom_softc *sc) { usbd_status err; uint8_t cur; err = get_status(sc, &cur); if (err) { device_printf(sc->sc_dev, "cannot update status: %s\n", usbd_errstr(err)); return EIO; } convert_status(sc, cur); return 0; } static int set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) { usbd_status err; uint8_t val = 0; if (dtr) val |= UCHCOM_DTR_MASK; if (rts) val |= UCHCOM_RTS_MASK; if (sc->sc_version < UCHCOM_VER_20) err = set_dtrrts_10(sc, ~val); else err = set_dtrrts_20(sc, ~val); if (err) { device_printf(sc->sc_dev, "cannot set DTR/RTS: %s\n", usbd_errstr(err)); return EIO; } return 0; } static int set_break(struct uchcom_softc *sc, int onoff) { usbd_status err; uint8_t brk, lcr; err = read_reg(sc, UCHCOM_REG_BREAK, &brk, UCHCOM_REG_LCR, &lcr); if (err) return EIO; if (onoff) { /* on - clear bits */ brk &= ~UCHCOM_BREAK_MASK; lcr &= ~UCHCOM_LCR_TXE; } else { /* off - set bits */ brk |= UCHCOM_BREAK_MASK; lcr |= UCHCOM_LCR_TXE; } err = write_reg(sc, UCHCOM_REG_BREAK, brk, UCHCOM_REG_LCR, lcr); if (err) return EIO; return 0; } static int calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) { /* * combined with rates4x[] defined above, this routine generates, * 1200: prescale = 1/0x1, divisor = 178/0xb2 * 2400: prescale = 1/0x1, divisor = 217/0xd9 * 4800: prescale = 2/0x2, divisor = 100/0x64 * 9600: prescale = 2/0x2, divisor = 178/0xb2 * 19200: prescale = 2/0x2, divisor = 217/0xd9 * 38400: prescale = 3/0x3, divisor = 100/0x64 * 57600: prescale = 2/0x2, divisor = 243/0xf3 * 115200: prescale = 3/0x3, divisor = 204/0xcc * 921600: prescale = 7/0x7, divisor = 243/0xf3 * 500000: prescale = 3/0x3, divisor = 244/0xf4 * 1000000: prescale = 3/0x3, divisor = 250/0xfa * 1500000: prescale = 3/0x3, divisor = 252/0xfc * 2000000: prescale = 3/0x3, divisor = 253/0xfd * 2500000: unsupported * 3000000: prescale = 3/0x3, divisor = 254/0xfe */ size_t i; uint32_t best, div, pre; const uint32_t rate4x = rate * 4U; if (rate == 0 || rate > 3000000) return -1; pre = __arraycount(rates4x); best = UINT32_MAX; for (i = 0; i < __arraycount(rates4x); i++) { uint32_t score, try; try = rates4x[i] * 2 / rate4x; try = (try / 2) + (try & 1); if (try < 2) continue; if (try > 255) try = 255; score = abs((int)rate4x - rates4x[i] / try); if (score < best) { best = score; pre = i; div = try; } } if (pre >= __arraycount(rates4x)) return -1; if ((rates4x[pre] / div / 4) < (rate * 99 / 100)) return -1; if ((rates4x[pre] / div / 4) > (rate * 101 / 100)) return -1; dp->dv_prescaler = pre; dp->dv_div = 256 - div; return 0; } static int set_dte_rate(struct uchcom_softc *sc, uint32_t rate) { usbd_status err; struct uchcom_divider dv; if (calc_divider_settings(&dv, rate)) return EINVAL; if ((err = write_reg(sc, UCHCOM_REG_BPS_PRE, dv.dv_prescaler | UCHCOM_BPS_PRE_IMM, UCHCOM_REG_BPS_DIV, dv.dv_div))) { device_printf(sc->sc_dev, "cannot set DTE rate: %s\n", usbd_errstr(err)); return EIO; } return 0; } static int set_line_control(struct uchcom_softc *sc, tcflag_t cflag) { usbd_status err; uint8_t lcr = 0, lcr2 = 0; err = read_reg(sc, UCHCOM_REG_LCR, &lcr, UCHCOM_REG_LCR2, &lcr2); if (err) { device_printf(sc->sc_dev, "cannot get LCR: %s\n", usbd_errstr(err)); return EIO; } lcr = UCHCOM_LCR_RXE | UCHCOM_LCR_TXE; switch (ISSET(cflag, CSIZE)) { case CS5: lcr |= UCHCOM_LCR_CS5; break; case CS6: lcr |= UCHCOM_LCR_CS6; break; case CS7: lcr |= UCHCOM_LCR_CS7; break; case CS8: lcr |= UCHCOM_LCR_CS8; break; } if (ISSET(cflag, PARENB)) { lcr |= UCHCOM_LCR_PARENB; if (!ISSET(cflag, PARODD)) lcr |= UCHCOM_LCR_PAREVEN; } if (ISSET(cflag, CSTOPB)) { lcr |= UCHCOM_LCR_STOPB; } err = write_reg(sc, UCHCOM_REG_LCR, lcr, UCHCOM_REG_LCR2, lcr2); if (err) { device_printf(sc->sc_dev, "cannot set LCR: %s\n", usbd_errstr(err)); return EIO; } return 0; } static int clear_chip(struct uchcom_softc *sc) { usbd_status err; DPRINTF(("%s: clear\n", device_xname(sc->sc_dev))); err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); if (err) { device_printf(sc->sc_dev, "cannot clear: %s\n", usbd_errstr(err)); return EIO; } /* * this REQ_RESET call ends up with * LCR=0xc0 (8N1) * PRE=0x02, DIV=0xd9 (19200) */ return 0; } static int setup_comm(struct uchcom_softc *sc) { int ret; ret = update_version(sc); if (ret) return ret; ret = clear_chip(sc); if (ret) return ret; ret = set_dte_rate(sc, TTYDEF_SPEED); if (ret) return ret; ret = set_line_control(sc, CS8); if (ret) return ret; ret = update_status(sc); if (ret) return ret; sc->sc_dtr = sc->sc_rts = 1; ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); if (ret) return ret; return 0; } static int setup_intr_pipe(struct uchcom_softc *sc) { usbd_status err; if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { sc->sc_intr_buf = kmem_alloc(sc->sc_intr_size, KM_SLEEP); err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_intr_endpoint, USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buf, sc->sc_intr_size, uchcom_intr, USBD_DEFAULT_INTERVAL); if (err) { device_printf(sc->sc_dev, "cannot open interrupt pipe: %s\n", usbd_errstr(err)); return EIO; } } return 0; } static void close_intr_pipe(struct uchcom_softc *sc) { if (sc->sc_intr_pipe != NULL) { usbd_abort_pipe(sc->sc_intr_pipe); usbd_close_pipe(sc->sc_intr_pipe); sc->sc_intr_pipe = NULL; } if (sc->sc_intr_buf != NULL) { kmem_free(sc->sc_intr_buf, sc->sc_intr_size); sc->sc_intr_buf = NULL; } } /* ---------------------------------------------------------------------- * methods for ucom */ static void uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) { struct uchcom_softc *sc = arg; if (sc->sc_dying) return; *rlsr = sc->sc_lsr; *rmsr = sc->sc_msr; } static void uchcom_set(void *arg, int portno, int reg, int onoff) { struct uchcom_softc *sc = arg; if (sc->sc_dying) return; switch (reg) { case UCOM_SET_DTR: sc->sc_dtr = !!onoff; set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); break; case UCOM_SET_RTS: sc->sc_rts = !!onoff; set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); break; case UCOM_SET_BREAK: set_break(sc, onoff); break; } } static int uchcom_param(void *arg, int portno, struct termios *t) { struct uchcom_softc *sc = arg; int ret; if (sc->sc_dying) return EIO; ret = set_line_control(sc, t->c_cflag); if (ret) return ret; ret = set_dte_rate(sc, t->c_ospeed); if (ret) return ret; return 0; } static int uchcom_open(void *arg, int portno) { int ret; struct uchcom_softc *sc = arg; if (sc->sc_dying) return EIO; ret = setup_intr_pipe(sc); if (ret) return ret; ret = setup_comm(sc); if (ret) return ret; return 0; } static void uchcom_close(void *arg, int portno) { struct uchcom_softc *sc = arg; if (sc->sc_dying) return; close_intr_pipe(sc); } /* ---------------------------------------------------------------------- * callback when the modem status is changed. */ static void uchcom_intr(struct usbd_xfer *xfer, void * priv, usbd_status status) { struct uchcom_softc *sc = priv; u_char *buf = sc->sc_intr_buf; if (sc->sc_dying) return; if (status != USBD_NORMAL_COMPLETION) { if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) return; DPRINTF(("%s: abnormal status: %s\n", device_xname(sc->sc_dev), usbd_errstr(status))); usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); return; } DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " "0x%02X 0x%02X 0x%02X 0x%02X\n", device_xname(sc->sc_dev), (unsigned)buf[0], (unsigned)buf[1], (unsigned)buf[2], (unsigned)buf[3], (unsigned)buf[4], (unsigned)buf[5], (unsigned)buf[6], (unsigned)buf[7])); convert_status(sc, buf[UCHCOM_INTR_STAT1]); ucom_status_change(device_private(sc->sc_subdev)); }