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/* $OpenBSD: umstc.c,v 1.6 2021/09/12 06:58:08 anton Exp $ */
/*
* Copyright (c) 2020 joshua stein <jcs@jcs.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.
*/
/*
* Microsoft Surface Type Cover driver to respond to F1-F7 keys, but also to
* keep the USB HID pipes open or else the Type Cover will detach and reattach
* each time one of these buttons is pressed.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/atomic.h>
#include <sys/task.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/uhidev.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include "audio.h"
#include "wsdisplay.h"
struct umstc_softc {
struct uhidev sc_hdev;
struct task sc_brightness_task;
int sc_brightness_steps;
};
void umstc_intr(struct uhidev *addr, void *ibuf, u_int len);
int umstc_match(struct device *, void *, void *);
void umstc_attach(struct device *, struct device *, void *);
int umstc_detach(struct device *, int flags);
void umstc_brightness_task(void *);
extern int wskbd_set_mixervolume(long, long);
struct cfdriver umstc_cd = {
NULL, "umstc", DV_DULL
};
const struct cfattach umstc_ca = {
sizeof(struct umstc_softc),
umstc_match,
umstc_attach,
umstc_detach,
};
static const struct usb_devno umstc_devs[] = {
{ USB_VENDOR_MICROSOFT, USB_PRODUCT_MICROSOFT_TYPECOVER },
{ USB_VENDOR_MICROSOFT, USB_PRODUCT_MICROSOFT_TYPECOVER2 },
{ USB_VENDOR_MICROSOFT, USB_PRODUCT_MICROSOFT_TYPECOVER3 },
};
int
umstc_match(struct device *parent, void *match, void *aux)
{
struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux;
int size;
void *desc;
if (!usb_lookup(umstc_devs, uha->uaa->vendor, uha->uaa->product))
return UMATCH_NONE;
uhidev_get_report_desc(uha->parent, &desc, &size);
if (hid_is_collection(desc, size, uha->reportid,
HID_USAGE2(HUP_CONSUMER, HUC_CONTROL)))
return UMATCH_IFACECLASS;
return UMATCH_NONE;
}
void
umstc_attach(struct device *parent, struct device *self, void *aux)
{
struct umstc_softc *sc = (struct umstc_softc *)self;
struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux;
struct usb_attach_arg *uaa = uha->uaa;
int size, repid;
void *desc;
sc->sc_hdev.sc_intr = umstc_intr;
sc->sc_hdev.sc_parent = uha->parent;
sc->sc_hdev.sc_udev = uaa->device;
sc->sc_hdev.sc_report_id = uha->reportid;
usbd_set_idle(uha->parent->sc_udev, uha->parent->sc_ifaceno, 0, 0);
uhidev_get_report_desc(uha->parent, &desc, &size);
repid = uha->reportid;
sc->sc_hdev.sc_isize = hid_report_size(desc, size, hid_input, repid);
sc->sc_hdev.sc_osize = hid_report_size(desc, size, hid_output, repid);
sc->sc_hdev.sc_fsize = hid_report_size(desc, size, hid_feature, repid);
uhidev_open(&sc->sc_hdev);
task_set(&sc->sc_brightness_task, umstc_brightness_task, sc);
printf("\n");
}
int
umstc_detach(struct device *self, int flags)
{
struct umstc_softc *sc = (struct umstc_softc *)self;
task_del(systq, &sc->sc_brightness_task);
uhidev_close(&sc->sc_hdev);
return 0;
}
void
umstc_intr(struct uhidev *addr, void *buf, u_int len)
{
struct umstc_softc *sc = (struct umstc_softc *)addr;
int i;
if (!len)
return;
switch (((unsigned char *)buf)[0]) {
case HUC_PLAY_PAUSE:
/*
* It would be nice to pass this through to userland but we'd
* need to attach a wskbd
*/
break;
case HUC_MUTE:
#if NAUDIO > 0
wskbd_set_mixervolume(0, 1);
#endif
break;
case HUC_VOL_INC:
#if NAUDIO > 0
wskbd_set_mixervolume(1, 1);
#endif
break;
case HUC_VOL_DEC:
#if NAUDIO > 0
wskbd_set_mixervolume(-1, 1);
#endif
break;
case 0x70: /* brightness down */
#if NWSDISPLAY > 0
atomic_sub_int(&sc->sc_brightness_steps, 1);
task_add(systq, &sc->sc_brightness_task);
#endif
break;
case 0x6f: /* brightness up */
#if NWSDISPLAY > 0
atomic_add_int(&sc->sc_brightness_steps, 1);
task_add(systq, &sc->sc_brightness_task);
#endif
break;
case 0:
break;
default:
printf("%s: unhandled key ", sc->sc_hdev.sc_dev.dv_xname);
for (i = 0; i < len; i++)
printf(" 0x%02x", ((unsigned char *)buf)[i]);
printf("\n");
}
}
void
umstc_brightness_task(void *arg)
{
struct umstc_softc *sc = arg;
int steps = atomic_swap_uint(&sc->sc_brightness_steps, 0);
int dir = 1;
if (steps < 0) {
steps = -steps;
dir = -1;
}
while (steps--)
wsdisplay_brightness_step(NULL, dir);
}
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