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/* $OpenBSD: if_cdcef.c,v 1.1 2006/11/25 18:10:29 uwe Exp $ */
/*
* Copyright (c) 2006 Uwe Stuehler <uwe@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.
*/
/*
* USB Communication Device Class Ethernet Emulation Model function driver
* (counterpart of the host-side cdce(4) driver)
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <net/if.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbf.h>
#include <dev/usb/usbcdc.h>
#define CDCEF_VENDOR_ID 0x0001
#define CDCEF_PRODUCT_ID 0x0001
#define CDCEF_DEVICE_CODE 0x0100
#define CDCEF_VENDOR_STRING "OpenBSD.org"
#define CDCEF_PRODUCT_STRING "CDC Ethernet Emulation"
#define CDCEF_SERIAL_STRING "1.00"
#define CDCEF_BUFSZ 65536
struct cdcef_softc {
struct usbf_function sc_dev;
usbf_config_handle sc_config;
usbf_interface_handle sc_iface;
usbf_endpoint_handle sc_ep_in;
usbf_endpoint_handle sc_ep_out;
usbf_pipe_handle sc_pipe_in;
usbf_pipe_handle sc_pipe_out;
usbf_xfer_handle sc_xfer_in;
usbf_xfer_handle sc_xfer_out;
void *sc_buffer_in;
void *sc_buffer_out;
};
int cdcef_match(struct device *, void *, void *);
void cdcef_attach(struct device *, struct device *, void *);
usbf_status cdcef_do_request(usbf_function_handle,
usb_device_request_t *, void **);
void cdcef_start(struct ifnet *);
void cdcef_txeof(usbf_xfer_handle, usbf_private_handle,
usbf_status);
void cdcef_rxeof(usbf_xfer_handle, usbf_private_handle,
usbf_status);
struct cfattach cdcef_ca = {
sizeof(struct cdcef_softc), cdcef_match, cdcef_attach
};
struct cfdriver cdcef_cd = {
NULL, "cdcef", DV_DULL
};
struct usbf_function_methods cdcef_methods = {
NULL, /* set_config */
cdcef_do_request
};
#ifndef CDCEF_DEBUG
#define DPRINTF(x) do {} while (0)
#else
#define DPRINTF(x) printf x
#endif
#define DEVNAME(sc) USBDEVNAME((sc)->sc_dev.bdev)
/*
* USB function match/attach/detach
*/
USB_MATCH(cdcef)
{
return UMATCH_GENERIC;
}
USB_ATTACH(cdcef)
{
struct cdcef_softc *sc = (struct cdcef_softc *)self;
struct usbf_attach_arg *uaa = aux;
usbf_device_handle dev = uaa->device;
char *devinfop;
usbf_status err;
usb_cdc_union_descriptor_t udesc;
/* Set the device identification according to the function. */
usbf_devinfo_setup(dev, UDCLASS_IN_INTERFACE, 0, 0, CDCEF_VENDOR_ID,
CDCEF_PRODUCT_ID, CDCEF_DEVICE_CODE, CDCEF_VENDOR_STRING,
CDCEF_PRODUCT_STRING, CDCEF_SERIAL_STRING);
devinfop = usbf_devinfo_alloc(dev);
printf(": %s\n", devinfop);
usbf_devinfo_free(devinfop);
/* Fill in the fields needed by the parent device. */
sc->sc_dev.methods = &cdcef_methods;
/*
* Build descriptors according to the device class specification.
*/
err = usbf_add_config(dev, &sc->sc_config);
if (err) {
printf("%s: usbf_add_config failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
err = usbf_add_interface(sc->sc_config, UICLASS_CDC,
UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL, 0, NULL,
&sc->sc_iface);
if (err) {
printf("%s: usbf_add_interface failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
/* XXX don't use hard-coded values 128 and 16. */
err = usbf_add_endpoint(sc->sc_iface, UE_DIR_IN, UE_BULK,
128, 16, &sc->sc_ep_in) ||
usbf_add_endpoint(sc->sc_iface, UE_DIR_OUT, UE_BULK,
128, 16, &sc->sc_ep_out);
if (err) {
printf("%s: usbf_add_endpoint failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
/* Append a CDC union descriptor. */
bzero(&udesc, sizeof udesc);
udesc.bLength = sizeof udesc;
udesc.bDescriptorType = UDESC_CS_INTERFACE;
udesc.bDescriptorSubtype = UDESCSUB_CDC_UNION;
udesc.bSlaveInterface[0] = usbf_interface_number(sc->sc_iface);
err = usbf_add_config_desc(sc->sc_config,
(usb_descriptor_t *)&udesc, NULL);
if (err) {
printf("%s: usbf_add_config_desc failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
/*
* Close the configuration and build permanent descriptors.
*/
err = usbf_end_config(sc->sc_config);
if (err) {
printf("%s: usbf_end_config failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
/* Preallocate xfers and data buffers. */
sc->sc_xfer_in = usbf_alloc_xfer(dev);
sc->sc_xfer_out = usbf_alloc_xfer(dev);
sc->sc_buffer_in = usbf_alloc_buffer(sc->sc_xfer_in,
CDCEF_BUFSZ);
sc->sc_buffer_out = usbf_alloc_buffer(sc->sc_xfer_out,
CDCEF_BUFSZ);
if (sc->sc_buffer_in == NULL || sc->sc_buffer_out == NULL) {
printf("%s: usbf_alloc_buffer failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
/* Open the bulk pipes. */
err = usbf_open_pipe(sc->sc_iface,
usbf_endpoint_address(sc->sc_ep_in), &sc->sc_pipe_in) ||
usbf_open_pipe(sc->sc_iface,
usbf_endpoint_address(sc->sc_ep_out), &sc->sc_pipe_out);
if (err) {
printf("%s: usbf_open_pipe failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
/* Get ready to receive packets. */
usbf_setup_xfer(sc->sc_xfer_out, sc->sc_pipe_out, (void *)sc,
sc->sc_buffer_out, CDCEF_BUFSZ, 0, 0, cdcef_rxeof);
err = usbf_transfer(sc->sc_xfer_out);
if (err && err != USBF_IN_PROGRESS) {
printf("%s: usbf_transfer failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
USB_ATTACH_SUCCESS_RETURN;
}
usbf_status
cdcef_do_request(usbf_function_handle fun, usb_device_request_t *req,
void **data)
{
return USBF_STALLED;
}
void
cdcef_start(struct ifnet *ifp)
{
}
void
cdcef_txeof(usbf_xfer_handle xfer, usbf_private_handle priv,
usbf_status err)
{
struct cdcef_softc *sc = priv;
printf("cdcef_txeof: xfer=%p, priv=%p, %s\n", xfer, priv,
usbf_errstr(err));
/* Setup another xfer. */
usbf_setup_xfer(xfer, sc->sc_pipe_in, (void *)sc,
sc->sc_buffer_in, CDCEF_BUFSZ, 0, 0, cdcef_rxeof);
err = usbf_transfer(xfer);
if (err && err != USBF_IN_PROGRESS) {
printf("%s: usbf_transfer failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
}
void
cdcef_rxeof(usbf_xfer_handle xfer, usbf_private_handle priv,
usbf_status err)
{
struct cdcef_softc *sc = priv;
printf("cdcef_txeof: xfer=%p, priv=%p, %s\n", xfer, priv,
usbf_errstr(err));
/* Setup another xfer. */
usbf_setup_xfer(xfer, sc->sc_pipe_out, (void *)sc,
sc->sc_buffer_out, CDCEF_BUFSZ, 0, 0, cdcef_rxeof);
err = usbf_transfer(xfer);
if (err && err != USBF_IN_PROGRESS) {
printf("%s: usbf_transfer failed\n", DEVNAME(sc));
USB_ATTACH_ERROR_RETURN;
}
}
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