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/* $FreeBSD: release/9.1.0/sys/dev/usb/serial/umoscom.c 223486 2011-06-24 02:30:02Z hselasky $ */
/* $OpenBSD: umoscom.c,v 1.2 2006/10/26 06:02:43 jsg Exp $ */
/*
* Copyright (c) 2006 Jonathan Gray <jsg@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include "usbdevs.h"
#define USB_DEBUG_VAR umoscom_debug
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/serial/usb_serial.h>
#ifdef USB_DEBUG
static int umoscom_debug = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, umoscom, CTLFLAG_RW, 0, "USB umoscom");
SYSCTL_INT(_hw_usb_umoscom, OID_AUTO, debug, CTLFLAG_RW,
&umoscom_debug, 0, "Debug level");
#endif
#define UMOSCOM_BUFSIZE 1024 /* bytes */
#define UMOSCOM_CONFIG_INDEX 0
#define UMOSCOM_IFACE_INDEX 0
/* interrupt packet */
#define UMOSCOM_IIR_RLS 0x06
#define UMOSCOM_IIR_RDA 0x04
#define UMOSCOM_IIR_CTI 0x0c
#define UMOSCOM_IIR_THR 0x02
#define UMOSCOM_IIR_MS 0x00
/* registers */
#define UMOSCOM_READ 0x0d
#define UMOSCOM_WRITE 0x0e
#define UMOSCOM_UART_REG 0x0300
#define UMOSCOM_VEND_REG 0x0000
#define UMOSCOM_TXBUF 0x00 /* Write */
#define UMOSCOM_RXBUF 0x00 /* Read */
#define UMOSCOM_INT 0x01
#define UMOSCOM_FIFO 0x02 /* Write */
#define UMOSCOM_ISR 0x02 /* Read */
#define UMOSCOM_LCR 0x03
#define UMOSCOM_MCR 0x04
#define UMOSCOM_LSR 0x05
#define UMOSCOM_MSR 0x06
#define UMOSCOM_SCRATCH 0x07
#define UMOSCOM_DIV_LO 0x08
#define UMOSCOM_DIV_HI 0x09
#define UMOSCOM_EFR 0x0a
#define UMOSCOM_XON1 0x0b
#define UMOSCOM_XON2 0x0c
#define UMOSCOM_XOFF1 0x0d
#define UMOSCOM_XOFF2 0x0e
#define UMOSCOM_BAUDLO 0x00
#define UMOSCOM_BAUDHI 0x01
#define UMOSCOM_INT_RXEN 0x01
#define UMOSCOM_INT_TXEN 0x02
#define UMOSCOM_INT_RSEN 0x04
#define UMOSCOM_INT_MDMEM 0x08
#define UMOSCOM_INT_SLEEP 0x10
#define UMOSCOM_INT_XOFF 0x20
#define UMOSCOM_INT_RTS 0x40
#define UMOSCOM_FIFO_EN 0x01
#define UMOSCOM_FIFO_RXCLR 0x02
#define UMOSCOM_FIFO_TXCLR 0x04
#define UMOSCOM_FIFO_DMA_BLK 0x08
#define UMOSCOM_FIFO_TXLVL_MASK 0x30
#define UMOSCOM_FIFO_TXLVL_8 0x00
#define UMOSCOM_FIFO_TXLVL_16 0x10
#define UMOSCOM_FIFO_TXLVL_32 0x20
#define UMOSCOM_FIFO_TXLVL_56 0x30
#define UMOSCOM_FIFO_RXLVL_MASK 0xc0
#define UMOSCOM_FIFO_RXLVL_8 0x00
#define UMOSCOM_FIFO_RXLVL_16 0x40
#define UMOSCOM_FIFO_RXLVL_56 0x80
#define UMOSCOM_FIFO_RXLVL_80 0xc0
#define UMOSCOM_ISR_MDM 0x00
#define UMOSCOM_ISR_NONE 0x01
#define UMOSCOM_ISR_TX 0x02
#define UMOSCOM_ISR_RX 0x04
#define UMOSCOM_ISR_LINE 0x06
#define UMOSCOM_ISR_RXTIMEOUT 0x0c
#define UMOSCOM_ISR_RX_XOFF 0x10
#define UMOSCOM_ISR_RTSCTS 0x20
#define UMOSCOM_ISR_FIFOEN 0xc0
#define UMOSCOM_LCR_DBITS(x) ((x) - 5)
#define UMOSCOM_LCR_STOP_BITS_1 0x00
#define UMOSCOM_LCR_STOP_BITS_2 0x04 /* 2 if 6-8 bits/char or 1.5 if 5 */
#define UMOSCOM_LCR_PARITY_NONE 0x00
#define UMOSCOM_LCR_PARITY_ODD 0x08
#define UMOSCOM_LCR_PARITY_EVEN 0x18
#define UMOSCOM_LCR_BREAK 0x40
#define UMOSCOM_LCR_DIVLATCH_EN 0x80
#define UMOSCOM_MCR_DTR 0x01
#define UMOSCOM_MCR_RTS 0x02
#define UMOSCOM_MCR_LOOP 0x04
#define UMOSCOM_MCR_INTEN 0x08
#define UMOSCOM_MCR_LOOPBACK 0x10
#define UMOSCOM_MCR_XONANY 0x20
#define UMOSCOM_MCR_IRDA_EN 0x40
#define UMOSCOM_MCR_BAUD_DIV4 0x80
#define UMOSCOM_LSR_RXDATA 0x01
#define UMOSCOM_LSR_RXOVER 0x02
#define UMOSCOM_LSR_RXPAR_ERR 0x04
#define UMOSCOM_LSR_RXFRM_ERR 0x08
#define UMOSCOM_LSR_RXBREAK 0x10
#define UMOSCOM_LSR_TXEMPTY 0x20
#define UMOSCOM_LSR_TXALLEMPTY 0x40
#define UMOSCOM_LSR_TXFIFO_ERR 0x80
#define UMOSCOM_MSR_CTS_CHG 0x01
#define UMOSCOM_MSR_DSR_CHG 0x02
#define UMOSCOM_MSR_RI_CHG 0x04
#define UMOSCOM_MSR_CD_CHG 0x08
#define UMOSCOM_MSR_CTS 0x10
#define UMOSCOM_MSR_RTS 0x20
#define UMOSCOM_MSR_RI 0x40
#define UMOSCOM_MSR_CD 0x80
#define UMOSCOM_BAUD_REF 115200
enum {
UMOSCOM_BULK_DT_WR,
UMOSCOM_BULK_DT_RD,
UMOSCOM_INTR_DT_RD,
UMOSCOM_N_TRANSFER,
};
struct umoscom_softc {
struct ucom_super_softc sc_super_ucom;
struct ucom_softc sc_ucom;
struct usb_xfer *sc_xfer[UMOSCOM_N_TRANSFER];
struct usb_device *sc_udev;
struct mtx sc_mtx;
uint8_t sc_mcr;
uint8_t sc_lcr;
};
/* prototypes */
static device_probe_t umoscom_probe;
static device_attach_t umoscom_attach;
static device_detach_t umoscom_detach;
static usb_callback_t umoscom_write_callback;
static usb_callback_t umoscom_read_callback;
static usb_callback_t umoscom_intr_callback;
static void umoscom_cfg_open(struct ucom_softc *);
static void umoscom_cfg_close(struct ucom_softc *);
static void umoscom_cfg_set_break(struct ucom_softc *, uint8_t);
static void umoscom_cfg_set_dtr(struct ucom_softc *, uint8_t);
static void umoscom_cfg_set_rts(struct ucom_softc *, uint8_t);
static int umoscom_pre_param(struct ucom_softc *, struct termios *);
static void umoscom_cfg_param(struct ucom_softc *, struct termios *);
static void umoscom_cfg_get_status(struct ucom_softc *, uint8_t *,
uint8_t *);
static void umoscom_cfg_write(struct umoscom_softc *, uint16_t, uint16_t);
static uint8_t umoscom_cfg_read(struct umoscom_softc *, uint16_t);
static void umoscom_start_read(struct ucom_softc *);
static void umoscom_stop_read(struct ucom_softc *);
static void umoscom_start_write(struct ucom_softc *);
static void umoscom_stop_write(struct ucom_softc *);
static void umoscom_poll(struct ucom_softc *ucom);
static const struct usb_config umoscom_config_data[UMOSCOM_N_TRANSFER] = {
[UMOSCOM_BULK_DT_WR] = {
.type = UE_BULK,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_OUT,
.bufsize = UMOSCOM_BUFSIZE,
.flags = {.pipe_bof = 1,.force_short_xfer = 1,},
.callback = &umoscom_write_callback,
},
[UMOSCOM_BULK_DT_RD] = {
.type = UE_BULK,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_IN,
.bufsize = UMOSCOM_BUFSIZE,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
.callback = &umoscom_read_callback,
},
[UMOSCOM_INTR_DT_RD] = {
.type = UE_INTERRUPT,
.endpoint = UE_ADDR_ANY,
.direction = UE_DIR_IN,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
.bufsize = 0, /* use wMaxPacketSize */
.callback = &umoscom_intr_callback,
},
};
static const struct ucom_callback umoscom_callback = {
/* configuration callbacks */
.ucom_cfg_get_status = &umoscom_cfg_get_status,
.ucom_cfg_set_dtr = &umoscom_cfg_set_dtr,
.ucom_cfg_set_rts = &umoscom_cfg_set_rts,
.ucom_cfg_set_break = &umoscom_cfg_set_break,
.ucom_cfg_param = &umoscom_cfg_param,
.ucom_cfg_open = &umoscom_cfg_open,
.ucom_cfg_close = &umoscom_cfg_close,
/* other callbacks */
.ucom_pre_param = &umoscom_pre_param,
.ucom_start_read = &umoscom_start_read,
.ucom_stop_read = &umoscom_stop_read,
.ucom_start_write = &umoscom_start_write,
.ucom_stop_write = &umoscom_stop_write,
.ucom_poll = &umoscom_poll,
};
static device_method_t umoscom_methods[] = {
DEVMETHOD(device_probe, umoscom_probe),
DEVMETHOD(device_attach, umoscom_attach),
DEVMETHOD(device_detach, umoscom_detach),
{0, 0}
};
static devclass_t umoscom_devclass;
static driver_t umoscom_driver = {
.name = "umoscom",
.methods = umoscom_methods,
.size = sizeof(struct umoscom_softc),
};
DRIVER_MODULE(umoscom, uhub, umoscom_driver, umoscom_devclass, NULL, 0);
MODULE_DEPEND(umoscom, ucom, 1, 1, 1);
MODULE_DEPEND(umoscom, usb, 1, 1, 1);
MODULE_VERSION(umoscom, 1);
static const STRUCT_USB_HOST_ID umoscom_devs[] = {
{USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703, 0)}
};
static int
umoscom_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 != UMOSCOM_CONFIG_INDEX) {
return (ENXIO);
}
if (uaa->info.bIfaceIndex != UMOSCOM_IFACE_INDEX) {
return (ENXIO);
}
return (usbd_lookup_id_by_uaa(umoscom_devs, sizeof(umoscom_devs), uaa));
}
static int
umoscom_attach(device_t dev)
{
struct usb_attach_arg *uaa = device_get_ivars(dev);
struct umoscom_softc *sc = device_get_softc(dev);
int error;
uint8_t iface_index;
sc->sc_udev = uaa->device;
sc->sc_mcr = 0x08; /* enable interrupts */
/* XXX the device doesn't provide any ID string, so set a static one */
device_set_desc(dev, "MOSCHIP USB Serial Port Adapter");
device_printf(dev, "<MOSCHIP USB Serial Port Adapter>\n");
mtx_init(&sc->sc_mtx, "umoscom", NULL, MTX_DEF);
iface_index = UMOSCOM_IFACE_INDEX;
error = usbd_transfer_setup(uaa->device, &iface_index,
sc->sc_xfer, umoscom_config_data,
UMOSCOM_N_TRANSFER, sc, &sc->sc_mtx);
if (error) {
goto detach;
}
/* clear stall at first run */
mtx_lock(&sc->sc_mtx);
usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
mtx_unlock(&sc->sc_mtx);
error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
&umoscom_callback, &sc->sc_mtx);
if (error) {
goto detach;
}
ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
return (0);
detach:
device_printf(dev, "attach error: %s\n", usbd_errstr(error));
umoscom_detach(dev);
return (ENXIO);
}
static int
umoscom_detach(device_t dev)
{
struct umoscom_softc *sc = device_get_softc(dev);
ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
usbd_transfer_unsetup(sc->sc_xfer, UMOSCOM_N_TRANSFER);
mtx_destroy(&sc->sc_mtx);
return (0);
}
static void
umoscom_cfg_open(struct ucom_softc *ucom)
{
struct umoscom_softc *sc = ucom->sc_parent;
DPRINTF("\n");
/* Purge FIFOs or odd things happen */
umoscom_cfg_write(sc, UMOSCOM_FIFO, 0x00 | UMOSCOM_UART_REG);
/* Enable FIFO */
umoscom_cfg_write(sc, UMOSCOM_FIFO, UMOSCOM_FIFO_EN |
UMOSCOM_FIFO_RXCLR | UMOSCOM_FIFO_TXCLR |
UMOSCOM_FIFO_DMA_BLK | UMOSCOM_FIFO_RXLVL_MASK |
UMOSCOM_UART_REG);
/* Enable Interrupt Registers */
umoscom_cfg_write(sc, UMOSCOM_INT, 0x0C | UMOSCOM_UART_REG);
/* Magic */
umoscom_cfg_write(sc, 0x01, 0x08);
/* Magic */
umoscom_cfg_write(sc, 0x00, 0x02);
}
static void
umoscom_cfg_close(struct ucom_softc *ucom)
{
return;
}
static void
umoscom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
{
struct umoscom_softc *sc = ucom->sc_parent;
uint16_t val;
val = sc->sc_lcr;
if (onoff)
val |= UMOSCOM_LCR_BREAK;
umoscom_cfg_write(sc, UMOSCOM_LCR, val | UMOSCOM_UART_REG);
}
static void
umoscom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
{
struct umoscom_softc *sc = ucom->sc_parent;
if (onoff)
sc->sc_mcr |= UMOSCOM_MCR_DTR;
else
sc->sc_mcr &= ~UMOSCOM_MCR_DTR;
umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
}
static void
umoscom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
{
struct umoscom_softc *sc = ucom->sc_parent;
if (onoff)
sc->sc_mcr |= UMOSCOM_MCR_RTS;
else
sc->sc_mcr &= ~UMOSCOM_MCR_RTS;
umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
}
static int
umoscom_pre_param(struct ucom_softc *ucom, struct termios *t)
{
if ((t->c_ospeed <= 1) || (t->c_ospeed > 115200))
return (EINVAL);
return (0);
}
static void
umoscom_cfg_param(struct ucom_softc *ucom, struct termios *t)
{
struct umoscom_softc *sc = ucom->sc_parent;
uint16_t data;
DPRINTF("speed=%d\n", t->c_ospeed);
data = ((uint32_t)UMOSCOM_BAUD_REF) / ((uint32_t)t->c_ospeed);
if (data == 0) {
DPRINTF("invalid baud rate!\n");
return;
}
umoscom_cfg_write(sc, UMOSCOM_LCR,
UMOSCOM_LCR_DIVLATCH_EN | UMOSCOM_UART_REG);
umoscom_cfg_write(sc, UMOSCOM_BAUDLO,
(data & 0xFF) | UMOSCOM_UART_REG);
umoscom_cfg_write(sc, UMOSCOM_BAUDHI,
((data >> 8) & 0xFF) | UMOSCOM_UART_REG);
if (t->c_cflag & CSTOPB)
data = UMOSCOM_LCR_STOP_BITS_2;
else
data = UMOSCOM_LCR_STOP_BITS_1;
if (t->c_cflag & PARENB) {
if (t->c_cflag & PARODD)
data |= UMOSCOM_LCR_PARITY_ODD;
else
data |= UMOSCOM_LCR_PARITY_EVEN;
} else
data |= UMOSCOM_LCR_PARITY_NONE;
switch (t->c_cflag & CSIZE) {
case CS5:
data |= UMOSCOM_LCR_DBITS(5);
break;
case CS6:
data |= UMOSCOM_LCR_DBITS(6);
break;
case CS7:
data |= UMOSCOM_LCR_DBITS(7);
break;
case CS8:
data |= UMOSCOM_LCR_DBITS(8);
break;
}
sc->sc_lcr = data;
umoscom_cfg_write(sc, UMOSCOM_LCR, data | UMOSCOM_UART_REG);
}
static void
umoscom_cfg_get_status(struct ucom_softc *ucom, uint8_t *p_lsr, uint8_t *p_msr)
{
struct umoscom_softc *sc = ucom->sc_parent;
uint8_t lsr;
uint8_t msr;
DPRINTFN(5, "\n");
/* read status registers */
lsr = umoscom_cfg_read(sc, UMOSCOM_LSR);
msr = umoscom_cfg_read(sc, UMOSCOM_MSR);
/* translate bits */
if (msr & UMOSCOM_MSR_CTS)
*p_msr |= SER_CTS;
if (msr & UMOSCOM_MSR_CD)
*p_msr |= SER_DCD;
if (msr & UMOSCOM_MSR_RI)
*p_msr |= SER_RI;
if (msr & UMOSCOM_MSR_RTS)
*p_msr |= SER_DSR;
}
static void
umoscom_cfg_write(struct umoscom_softc *sc, uint16_t reg, uint16_t val)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = UMOSCOM_WRITE;
USETW(req.wValue, val);
USETW(req.wIndex, reg);
USETW(req.wLength, 0);
ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
&req, NULL, 0, 1000);
}
static uint8_t
umoscom_cfg_read(struct umoscom_softc *sc, uint16_t reg)
{
struct usb_device_request req;
uint8_t val;
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = UMOSCOM_READ;
USETW(req.wValue, 0);
USETW(req.wIndex, reg);
USETW(req.wLength, 1);
ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
&req, &val, 0, 1000);
DPRINTF("reg=0x%04x, val=0x%02x\n", reg, val);
return (val);
}
static void
umoscom_start_read(struct ucom_softc *ucom)
{
struct umoscom_softc *sc = ucom->sc_parent;
#if 0
/* start interrupt endpoint */
usbd_transfer_start(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
#endif
/* start read endpoint */
usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
}
static void
umoscom_stop_read(struct ucom_softc *ucom)
{
struct umoscom_softc *sc = ucom->sc_parent;
/* stop interrupt transfer */
usbd_transfer_stop(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
/* stop read endpoint */
usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
}
static void
umoscom_start_write(struct ucom_softc *ucom)
{
struct umoscom_softc *sc = ucom->sc_parent;
usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
}
static void
umoscom_stop_write(struct ucom_softc *ucom)
{
struct umoscom_softc *sc = ucom->sc_parent;
usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
}
static void
umoscom_write_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct umoscom_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
uint32_t actlen;
switch (USB_GET_STATE(xfer)) {
case USB_ST_SETUP:
case USB_ST_TRANSFERRED:
tr_setup:
DPRINTF("\n");
pc = usbd_xfer_get_frame(xfer, 0);
if (ucom_get_data(&sc->sc_ucom, pc, 0,
UMOSCOM_BUFSIZE, &actlen)) {
usbd_xfer_set_frame_len(xfer, 0, actlen);
usbd_transfer_submit(xfer);
}
return;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
DPRINTFN(0, "transfer failed\n");
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
return;
}
}
static void
umoscom_read_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct umoscom_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
DPRINTF("got %d bytes\n", actlen);
pc = usbd_xfer_get_frame(xfer, 0);
ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
case USB_ST_SETUP:
tr_setup:
DPRINTF("\n");
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
return;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
DPRINTFN(0, "transfer failed\n");
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
return;
}
}
static void
umoscom_intr_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct umoscom_softc *sc = usbd_xfer_softc(xfer);
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
if (actlen < 2) {
DPRINTF("too short message\n");
goto tr_setup;
}
ucom_status_change(&sc->sc_ucom);
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) {
DPRINTFN(0, "transfer failed\n");
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
return;
}
}
static void
umoscom_poll(struct ucom_softc *ucom)
{
struct umoscom_softc *sc = ucom->sc_parent;
usbd_transfer_poll(sc->sc_xfer, UMOSCOM_N_TRANSFER);
}