/* $NetBSD: usb/uvscom.c,v 1.1 2002/03/19 15:08:42 augustss Exp $ */ #include __FBSDID("$FreeBSD$"); /*- * Copyright (c) 2001-2003, 2005 Shunsuke Akiyama . * All rights reserved. * * 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 AUTHOR 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 AUTHOR 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. * */ /* * uvscom: SUNTAC Slipper U VS-10U driver. * Slipper U is a PC Card to USB converter for data communication card * adapter. It supports DDI Pocket's Air H" C@rd, C@rd H" 64, NTT's P-in, * P-in m@ater and various data communication card adapters. */ #include #include #include #include #include #define USB_DEBUG_VAR uvscom_debug #include #include #include #include #include #include #include #include #if USB_DEBUG static int uvscom_debug = 0; SYSCTL_NODE(_hw_usb2, OID_AUTO, uvscom, CTLFLAG_RW, 0, "USB uvscom"); SYSCTL_INT(_hw_usb2_uvscom, OID_AUTO, debug, CTLFLAG_RW, &uvscom_debug, 0, "Debug level"); #endif #define UVSCOM_MODVER 1 /* module version */ #define UVSCOM_CONFIG_INDEX 0 #define UVSCOM_IFACE_INDEX 0 /* Request */ #define UVSCOM_SET_SPEED 0x10 #define UVSCOM_LINE_CTL 0x11 #define UVSCOM_SET_PARAM 0x12 #define UVSCOM_READ_STATUS 0xd0 #define UVSCOM_SHUTDOWN 0xe0 /* UVSCOM_SET_SPEED parameters */ #define UVSCOM_SPEED_150BPS 0x00 #define UVSCOM_SPEED_300BPS 0x01 #define UVSCOM_SPEED_600BPS 0x02 #define UVSCOM_SPEED_1200BPS 0x03 #define UVSCOM_SPEED_2400BPS 0x04 #define UVSCOM_SPEED_4800BPS 0x05 #define UVSCOM_SPEED_9600BPS 0x06 #define UVSCOM_SPEED_19200BPS 0x07 #define UVSCOM_SPEED_38400BPS 0x08 #define UVSCOM_SPEED_57600BPS 0x09 #define UVSCOM_SPEED_115200BPS 0x0a /* UVSCOM_LINE_CTL parameters */ #define UVSCOM_BREAK 0x40 #define UVSCOM_RTS 0x02 #define UVSCOM_DTR 0x01 #define UVSCOM_LINE_INIT 0x08 /* UVSCOM_SET_PARAM parameters */ #define UVSCOM_DATA_MASK 0x03 #define UVSCOM_DATA_BIT_8 0x03 #define UVSCOM_DATA_BIT_7 0x02 #define UVSCOM_DATA_BIT_6 0x01 #define UVSCOM_DATA_BIT_5 0x00 #define UVSCOM_STOP_MASK 0x04 #define UVSCOM_STOP_BIT_2 0x04 #define UVSCOM_STOP_BIT_1 0x00 #define UVSCOM_PARITY_MASK 0x18 #define UVSCOM_PARITY_EVEN 0x18 #define UVSCOM_PARITY_ODD 0x08 #define UVSCOM_PARITY_NONE 0x00 /* Status bits */ #define UVSCOM_TXRDY 0x04 #define UVSCOM_RXRDY 0x01 #define UVSCOM_DCD 0x08 #define UVSCOM_NOCARD 0x04 #define UVSCOM_DSR 0x02 #define UVSCOM_CTS 0x01 #define UVSCOM_USTAT_MASK (UVSCOM_NOCARD | UVSCOM_DSR | UVSCOM_CTS) #define UVSCOM_BULK_BUF_SIZE 1024 /* bytes */ #define UVSCOM_N_TRANSFER 6 /* units */ struct uvscom_softc { struct usb2_com_super_softc sc_super_ucom; struct usb2_com_softc sc_ucom; struct usb2_xfer *sc_xfer[UVSCOM_N_TRANSFER]; struct usb2_device *sc_udev; uint16_t sc_line; /* line control register */ uint8_t sc_flag; #define UVSCOM_FLAG_WRITE_STALL 0x0001 #define UVSCOM_FLAG_READ_STALL 0x0002 #define UVSCOM_FLAG_INTR_STALL 0x0004 uint8_t sc_iface_no; /* interface number */ uint8_t sc_iface_index; /* interface index */ uint8_t sc_lsr; /* local status register */ uint8_t sc_msr; /* uvscom status register */ uint8_t sc_unit_status; /* unit status */ }; /* prototypes */ static device_probe_t uvscom_probe; static device_attach_t uvscom_attach; static device_detach_t uvscom_detach; static usb2_callback_t uvscom_write_callback; static usb2_callback_t uvscom_write_clear_stall_callback; static usb2_callback_t uvscom_read_callback; static usb2_callback_t uvscom_read_clear_stall_callback; static usb2_callback_t uvscom_intr_callback; static usb2_callback_t uvscom_intr_clear_stall_callback; static void uvscom_cfg_set_dtr(struct usb2_com_softc *, uint8_t); static void uvscom_cfg_set_rts(struct usb2_com_softc *, uint8_t); static void uvscom_cfg_set_break(struct usb2_com_softc *, uint8_t); static int uvscom_pre_param(struct usb2_com_softc *, struct termios *); static void uvscom_cfg_param(struct usb2_com_softc *, struct termios *); static int uvscom_pre_open(struct usb2_com_softc *); static void uvscom_cfg_open(struct usb2_com_softc *); static void uvscom_cfg_close(struct usb2_com_softc *); static void uvscom_start_read(struct usb2_com_softc *); static void uvscom_stop_read(struct usb2_com_softc *); static void uvscom_start_write(struct usb2_com_softc *); static void uvscom_stop_write(struct usb2_com_softc *); static void uvscom_cfg_get_status(struct usb2_com_softc *, uint8_t *, uint8_t *); static void uvscom_cfg_write(struct uvscom_softc *, uint8_t, uint16_t); static uint16_t uvscom_cfg_read_status(struct uvscom_softc *); static const struct usb2_config uvscom_config[UVSCOM_N_TRANSFER] = { [0] = { .type = UE_BULK, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_OUT, .mh.bufsize = UVSCOM_BULK_BUF_SIZE, .mh.flags = {.pipe_bof = 1,.force_short_xfer = 1,}, .mh.callback = &uvscom_write_callback, }, [1] = { .type = UE_BULK, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_IN, .mh.bufsize = UVSCOM_BULK_BUF_SIZE, .mh.flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, .mh.callback = &uvscom_read_callback, }, [2] = { .type = UE_CONTROL, .endpoint = 0x00, /* Control pipe */ .direction = UE_DIR_ANY, .mh.bufsize = sizeof(struct usb2_device_request), .mh.callback = &uvscom_write_clear_stall_callback, .mh.timeout = 1000, /* 1 second */ .mh.interval = 50, /* 50ms */ }, [3] = { .type = UE_CONTROL, .endpoint = 0x00, /* Control pipe */ .direction = UE_DIR_ANY, .mh.bufsize = sizeof(struct usb2_device_request), .mh.callback = &uvscom_read_clear_stall_callback, .mh.timeout = 1000, /* 1 second */ .mh.interval = 50, /* 50ms */ }, [4] = { .type = UE_INTERRUPT, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_IN, .mh.flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, .mh.bufsize = 0, /* use wMaxPacketSize */ .mh.callback = &uvscom_intr_callback, }, [5] = { .type = UE_CONTROL, .endpoint = 0x00, /* Control pipe */ .direction = UE_DIR_ANY, .mh.bufsize = sizeof(struct usb2_device_request), .mh.callback = &uvscom_intr_clear_stall_callback, .mh.timeout = 1000, /* 1 second */ .mh.interval = 50, /* 50ms */ }, }; static const struct usb2_com_callback uvscom_callback = { .usb2_com_cfg_get_status = &uvscom_cfg_get_status, .usb2_com_cfg_set_dtr = &uvscom_cfg_set_dtr, .usb2_com_cfg_set_rts = &uvscom_cfg_set_rts, .usb2_com_cfg_set_break = &uvscom_cfg_set_break, .usb2_com_cfg_param = &uvscom_cfg_param, .usb2_com_cfg_open = &uvscom_cfg_open, .usb2_com_cfg_close = &uvscom_cfg_close, .usb2_com_pre_open = &uvscom_pre_open, .usb2_com_pre_param = &uvscom_pre_param, .usb2_com_start_read = &uvscom_start_read, .usb2_com_stop_read = &uvscom_stop_read, .usb2_com_start_write = &uvscom_start_write, .usb2_com_stop_write = &uvscom_stop_write, }; static const struct usb2_device_id uvscom_devs[] = { /* SUNTAC U-Cable type A4 */ {USB_VPI(USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_AS144L4, 0)}, /* SUNTAC U-Cable type D2 */ {USB_VPI(USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_DS96L, 0)}, /* SUNTAC Ir-Trinity */ {USB_VPI(USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_IS96U, 0)}, /* SUNTAC U-Cable type P1 */ {USB_VPI(USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_PS64P1, 0)}, /* SUNTAC Slipper U */ {USB_VPI(USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_VS10U, 0)}, }; static device_method_t uvscom_methods[] = { DEVMETHOD(device_probe, uvscom_probe), DEVMETHOD(device_attach, uvscom_attach), DEVMETHOD(device_detach, uvscom_detach), {0, 0} }; static devclass_t uvscom_devclass; static driver_t uvscom_driver = { .name = "uvscom", .methods = uvscom_methods, .size = sizeof(struct uvscom_softc), }; DRIVER_MODULE(uvscom, ushub, uvscom_driver, uvscom_devclass, NULL, 0); MODULE_DEPEND(uvscom, usb2_serial, 1, 1, 1); MODULE_DEPEND(uvscom, usb2_core, 1, 1, 1); MODULE_VERSION(uvscom, UVSCOM_MODVER); static int uvscom_probe(device_t dev) { struct usb2_attach_arg *uaa = device_get_ivars(dev); if (uaa->usb2_mode != USB_MODE_HOST) { return (ENXIO); } if (uaa->info.bConfigIndex != UVSCOM_CONFIG_INDEX) { return (ENXIO); } if (uaa->info.bIfaceIndex != UVSCOM_IFACE_INDEX) { return (ENXIO); } return (usb2_lookup_id_by_uaa(uvscom_devs, sizeof(uvscom_devs), uaa)); } static int uvscom_attach(device_t dev) { struct usb2_attach_arg *uaa = device_get_ivars(dev); struct uvscom_softc *sc = device_get_softc(dev); int error; if (sc == NULL) { return (ENOMEM); } device_set_usb2_desc(dev); sc->sc_udev = uaa->device; DPRINTF("sc=%p\n", sc); sc->sc_iface_no = uaa->info.bIfaceNum; sc->sc_iface_index = UVSCOM_IFACE_INDEX; error = usb2_transfer_setup(uaa->device, &sc->sc_iface_index, sc->sc_xfer, uvscom_config, UVSCOM_N_TRANSFER, sc, &Giant); if (error) { DPRINTF("could not allocate all USB transfers!\n"); goto detach; } sc->sc_line = UVSCOM_LINE_INIT; /* clear stall at first run */ sc->sc_flag |= (UVSCOM_FLAG_WRITE_STALL | UVSCOM_FLAG_READ_STALL); error = usb2_com_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc, &uvscom_callback, &Giant); if (error) { goto detach; } /* start interrupt pipe */ mtx_lock(&Giant); usb2_transfer_start(sc->sc_xfer[4]); mtx_unlock(&Giant); return (0); detach: uvscom_detach(dev); return (ENXIO); } static int uvscom_detach(device_t dev) { struct uvscom_softc *sc = device_get_softc(dev); DPRINTF("sc=%p\n", sc); /* stop interrupt pipe */ if (sc->sc_xfer[4]) { usb2_transfer_stop(sc->sc_xfer[4]); } usb2_com_detach(&sc->sc_super_ucom, &sc->sc_ucom, 1); usb2_transfer_unsetup(sc->sc_xfer, UVSCOM_N_TRANSFER); return (0); } static void uvscom_write_callback(struct usb2_xfer *xfer) { struct uvscom_softc *sc = xfer->priv_sc; uint32_t actlen; switch (USB_GET_STATE(xfer)) { case USB_ST_SETUP: case USB_ST_TRANSFERRED: if (sc->sc_flag & UVSCOM_FLAG_WRITE_STALL) { usb2_transfer_start(sc->sc_xfer[2]); return; } if (usb2_com_get_data(&sc->sc_ucom, xfer->frbuffers, 0, UVSCOM_BULK_BUF_SIZE, &actlen)) { xfer->frlengths[0] = actlen; usb2_start_hardware(xfer); } return; default: /* Error */ if (xfer->error != USB_ERR_CANCELLED) { sc->sc_flag |= UVSCOM_FLAG_WRITE_STALL; usb2_transfer_start(sc->sc_xfer[2]); } return; } } static void uvscom_write_clear_stall_callback(struct usb2_xfer *xfer) { struct uvscom_softc *sc = xfer->priv_sc; struct usb2_xfer *xfer_other = sc->sc_xfer[0]; if (usb2_clear_stall_callback(xfer, xfer_other)) { DPRINTF("stall cleared\n"); sc->sc_flag &= ~UVSCOM_FLAG_WRITE_STALL; usb2_transfer_start(xfer_other); } } static void uvscom_read_callback(struct usb2_xfer *xfer) { struct uvscom_softc *sc = xfer->priv_sc; switch (USB_GET_STATE(xfer)) { case USB_ST_TRANSFERRED: usb2_com_put_data(&sc->sc_ucom, xfer->frbuffers, 0, xfer->actlen); case USB_ST_SETUP: if (sc->sc_flag & UVSCOM_FLAG_READ_STALL) { usb2_transfer_start(sc->sc_xfer[3]); } else { xfer->frlengths[0] = xfer->max_data_length; usb2_start_hardware(xfer); } return; default: /* Error */ if (xfer->error != USB_ERR_CANCELLED) { sc->sc_flag |= UVSCOM_FLAG_READ_STALL; usb2_transfer_start(sc->sc_xfer[3]); } return; } } static void uvscom_read_clear_stall_callback(struct usb2_xfer *xfer) { struct uvscom_softc *sc = xfer->priv_sc; struct usb2_xfer *xfer_other = sc->sc_xfer[1]; if (usb2_clear_stall_callback(xfer, xfer_other)) { DPRINTF("stall cleared\n"); sc->sc_flag &= ~UVSCOM_FLAG_READ_STALL; usb2_transfer_start(xfer_other); } } static void uvscom_intr_callback(struct usb2_xfer *xfer) { struct uvscom_softc *sc = xfer->priv_sc; uint8_t buf[2]; switch (USB_GET_STATE(xfer)) { case USB_ST_TRANSFERRED: if (xfer->actlen >= 2) { usb2_copy_out(xfer->frbuffers, 0, buf, sizeof(buf)); sc->sc_lsr = 0; sc->sc_msr = 0; sc->sc_unit_status = buf[1]; if (buf[0] & UVSCOM_TXRDY) { sc->sc_lsr |= ULSR_TXRDY; } if (buf[0] & UVSCOM_RXRDY) { sc->sc_lsr |= ULSR_RXRDY; } if (buf[1] & UVSCOM_CTS) { sc->sc_msr |= SER_CTS; } if (buf[1] & UVSCOM_DSR) { sc->sc_msr |= SER_DSR; } if (buf[1] & UVSCOM_DCD) { sc->sc_msr |= SER_DCD; } /* * the UCOM layer will ignore this call if the TTY * device is closed! */ usb2_com_status_change(&sc->sc_ucom); } case USB_ST_SETUP: if (sc->sc_flag & UVSCOM_FLAG_INTR_STALL) { usb2_transfer_start(sc->sc_xfer[5]); } else { xfer->frlengths[0] = xfer->max_data_length; usb2_start_hardware(xfer); } return; default: /* Error */ if (xfer->error != USB_ERR_CANCELLED) { sc->sc_flag |= UVSCOM_FLAG_INTR_STALL; usb2_transfer_start(sc->sc_xfer[5]); } return; } } static void uvscom_intr_clear_stall_callback(struct usb2_xfer *xfer) { struct uvscom_softc *sc = xfer->priv_sc; struct usb2_xfer *xfer_other = sc->sc_xfer[4]; if (usb2_clear_stall_callback(xfer, xfer_other)) { DPRINTF("stall cleared\n"); sc->sc_flag &= ~UVSCOM_FLAG_INTR_STALL; usb2_transfer_start(xfer_other); } } static void uvscom_cfg_set_dtr(struct usb2_com_softc *ucom, uint8_t onoff) { struct uvscom_softc *sc = ucom->sc_parent; DPRINTF("onoff = %d\n", onoff); if (onoff) sc->sc_line |= UVSCOM_DTR; else sc->sc_line &= ~UVSCOM_DTR; uvscom_cfg_write(sc, UVSCOM_LINE_CTL, sc->sc_line); } static void uvscom_cfg_set_rts(struct usb2_com_softc *ucom, uint8_t onoff) { struct uvscom_softc *sc = ucom->sc_parent; DPRINTF("onoff = %d\n", onoff); if (onoff) sc->sc_line |= UVSCOM_RTS; else sc->sc_line &= ~UVSCOM_RTS; uvscom_cfg_write(sc, UVSCOM_LINE_CTL, sc->sc_line); } static void uvscom_cfg_set_break(struct usb2_com_softc *ucom, uint8_t onoff) { struct uvscom_softc *sc = ucom->sc_parent; DPRINTF("onoff = %d\n", onoff); if (onoff) sc->sc_line |= UVSCOM_BREAK; else sc->sc_line &= ~UVSCOM_BREAK; uvscom_cfg_write(sc, UVSCOM_LINE_CTL, sc->sc_line); } static int uvscom_pre_param(struct usb2_com_softc *ucom, struct termios *t) { switch (t->c_ospeed) { case B150: case B300: case B600: case B1200: case B2400: case B4800: case B9600: case B19200: case B38400: case B57600: case B115200: default: return (EINVAL); } return (0); } static void uvscom_cfg_param(struct usb2_com_softc *ucom, struct termios *t) { struct uvscom_softc *sc = ucom->sc_parent; uint16_t value; DPRINTF("\n"); switch (t->c_ospeed) { case B150: value = UVSCOM_SPEED_150BPS; break; case B300: value = UVSCOM_SPEED_300BPS; break; case B600: value = UVSCOM_SPEED_600BPS; break; case B1200: value = UVSCOM_SPEED_1200BPS; break; case B2400: value = UVSCOM_SPEED_2400BPS; break; case B4800: value = UVSCOM_SPEED_4800BPS; break; case B9600: value = UVSCOM_SPEED_9600BPS; break; case B19200: value = UVSCOM_SPEED_19200BPS; break; case B38400: value = UVSCOM_SPEED_38400BPS; break; case B57600: value = UVSCOM_SPEED_57600BPS; break; case B115200: value = UVSCOM_SPEED_115200BPS; break; default: return; } uvscom_cfg_write(sc, UVSCOM_SET_SPEED, value); value = 0; if (t->c_cflag & CSTOPB) { value |= UVSCOM_STOP_BIT_2; } if (t->c_cflag & PARENB) { if (t->c_cflag & PARODD) { value |= UVSCOM_PARITY_ODD; } else { value |= UVSCOM_PARITY_EVEN; } } else { value |= UVSCOM_PARITY_NONE; } switch (t->c_cflag & CSIZE) { case CS5: value |= UVSCOM_DATA_BIT_5; break; case CS6: value |= UVSCOM_DATA_BIT_6; break; case CS7: value |= UVSCOM_DATA_BIT_7; break; default: case CS8: value |= UVSCOM_DATA_BIT_8; break; } uvscom_cfg_write(sc, UVSCOM_SET_PARAM, value); } static int uvscom_pre_open(struct usb2_com_softc *ucom) { struct uvscom_softc *sc = ucom->sc_parent; DPRINTF("sc = %p\n", sc); /* check if PC card was inserted */ if (sc->sc_unit_status & UVSCOM_NOCARD) { DPRINTF("no PC card!\n"); return (ENXIO); } return (0); } static void uvscom_cfg_open(struct usb2_com_softc *ucom) { struct uvscom_softc *sc = ucom->sc_parent; DPRINTF("sc = %p\n", sc); uvscom_cfg_read_status(sc); } static void uvscom_cfg_close(struct usb2_com_softc *ucom) { struct uvscom_softc *sc = ucom->sc_parent; DPRINTF("sc=%p\n", sc); uvscom_cfg_write(sc, UVSCOM_SHUTDOWN, 0); } static void uvscom_start_read(struct usb2_com_softc *ucom) { struct uvscom_softc *sc = ucom->sc_parent; usb2_transfer_start(sc->sc_xfer[1]); } static void uvscom_stop_read(struct usb2_com_softc *ucom) { struct uvscom_softc *sc = ucom->sc_parent; usb2_transfer_stop(sc->sc_xfer[3]); usb2_transfer_stop(sc->sc_xfer[1]); } static void uvscom_start_write(struct usb2_com_softc *ucom) { struct uvscom_softc *sc = ucom->sc_parent; usb2_transfer_start(sc->sc_xfer[0]); } static void uvscom_stop_write(struct usb2_com_softc *ucom) { struct uvscom_softc *sc = ucom->sc_parent; usb2_transfer_stop(sc->sc_xfer[2]); usb2_transfer_stop(sc->sc_xfer[0]); } static void uvscom_cfg_get_status(struct usb2_com_softc *ucom, uint8_t *lsr, uint8_t *msr) { struct uvscom_softc *sc = ucom->sc_parent; *lsr = sc->sc_lsr; *msr = sc->sc_msr; } static void uvscom_cfg_write(struct uvscom_softc *sc, uint8_t index, uint16_t value) { struct usb2_device_request req; usb2_error_t err; if (usb2_com_cfg_is_gone(&sc->sc_ucom)) { return; } req.bmRequestType = UT_WRITE_VENDOR_DEVICE; req.bRequest = index; USETW(req.wValue, value); USETW(req.wIndex, 0); USETW(req.wLength, 0); err = usb2_do_request_flags(sc->sc_udev, &Giant, &req, NULL, 0, NULL, 1000); if (err) { DPRINTFN(0, "device request failed, err=%s " "(ignored)\n", usb2_errstr(err)); } } static uint16_t uvscom_cfg_read_status(struct uvscom_softc *sc) { struct usb2_device_request req; usb2_error_t err; uint8_t data[2]; if (usb2_com_cfg_is_gone(&sc->sc_ucom)) { return (0); } req.bmRequestType = UT_READ_VENDOR_DEVICE; req.bRequest = UVSCOM_READ_STATUS; USETW(req.wValue, 0); USETW(req.wIndex, 0); USETW(req.wLength, 2); err = usb2_do_request_flags(sc->sc_udev, &Giant, &req, data, 0, NULL, 1000); if (err) { DPRINTFN(0, "device request failed, err=%s " "(ignored)\n", usb2_errstr(err)); data[0] = 0; data[1] = 0; } return (data[0] | (data[1] << 8)); }