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/* $OpenBSD: ucrcom.c,v 1.3 2024/05/23 03:21:09 jsg Exp $ */
/*
* Copyright (c) 2019 Mark Kettenis <kettenis@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/param.h>
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/device.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/ucomvar.h>
#define UCRCOMBUFSZ 64
struct ucrcom_softc {
struct device sc_dev;
struct device *sc_subdev;
};
const struct ucom_methods ucrcom_methods = { NULL };
int ucrcom_match(struct device *, void *, void *);
void ucrcom_attach(struct device *, struct device *, void *);
int ucrcom_detach(struct device *, int);
struct cfdriver ucrcom_cd = {
NULL, "ucrcom", DV_DULL
};
const struct cfattach ucrcom_ca = {
sizeof(struct ucrcom_softc), ucrcom_match, ucrcom_attach, ucrcom_detach
};
int
ucrcom_match(struct device *parent, void *match, void *aux)
{
struct usb_attach_arg *uaa = aux;
usb_interface_descriptor_t *id;
usb_device_descriptor_t *dd;
if (uaa->iface == NULL)
return UMATCH_NONE;
id = usbd_get_interface_descriptor(uaa->iface);
dd = usbd_get_device_descriptor(uaa->device);
if (id == NULL || dd == NULL)
return UMATCH_NONE;
if (UGETW(dd->idVendor) == USB_VENDOR_GOOGLE &&
id->bInterfaceClass == UICLASS_VENDOR &&
id->bInterfaceSubClass == 0x50 &&
id->bInterfaceProtocol == 1)
return UMATCH_VENDOR_IFACESUBCLASS_IFACEPROTO;
return UMATCH_NONE;
}
void
ucrcom_attach(struct device *parent, struct device *self, void *aux)
{
struct ucrcom_softc *sc = (struct ucrcom_softc *)self;
struct usb_attach_arg *uaa = aux;
struct ucom_attach_args uca;
usb_interface_descriptor_t *id;
usb_endpoint_descriptor_t *ed;
int i;
id = usbd_get_interface_descriptor(uaa->iface);
memset(&uca, 0, sizeof(uca));
uca.bulkin = uca.bulkout = -1;
for (i = 0; i < id->bNumEndpoints; i++) {
ed = usbd_interface2endpoint_descriptor(uaa->iface, i);
if (ed == NULL) {
printf("%s: no endpoint descriptor for %d\n",
sc->sc_dev.dv_xname, i);
usbd_deactivate(uaa->device);
return;
}
if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
uca.bulkin = ed->bEndpointAddress;
else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
uca.bulkout = ed->bEndpointAddress;
}
if (uca.bulkin == -1 || uca.bulkout == -1) {
printf("%s: missing endpoint\n", sc->sc_dev.dv_xname);
usbd_deactivate(uaa->device);
return;
}
uca.ibufsize = UCRCOMBUFSZ;
uca.ibufsizepad = UCRCOMBUFSZ;
uca.obufsize = UCRCOMBUFSZ;
uca.opkthdrlen = 0;
uca.device = uaa->device;
uca.iface = uaa->iface;
uca.methods = &ucrcom_methods;
uca.arg = sc;
sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch);
}
int
ucrcom_detach(struct device *self, int flags)
{
struct ucrcom_softc *sc = (struct ucrcom_softc *)self;
int rv = 0;
if (sc->sc_subdev != NULL)
rv = config_detach(sc->sc_subdev, flags);
return rv;
}
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