IABSD.fr/src/sys/dev/usb/ujoy.c

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• Author : guenther
  Date : 2024-12-30 02:46:00
  Hash : b9ae17a0
  Message : All the device and file type ioctl routines just ignore FIONBIO, so stop calling down into those layer from fcntl(F_SETFL) or ioctl(FIONBIO) and delete the "do nothing for this" stubs in all the *ioctl routines. ok dlg@

• sys/dev/usb/ujoy.c

• /*	$OpenBSD: ujoy.c,v 1.6 2024/12/30 02:46:00 guenther Exp $ */
  
  /*
   * Copyright (c) 2021 Thomas Frohwein	<thfr@openbsd.org>
   * Copyright (c) 2021 Bryan Steele	<brynet@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/device.h>
  #include <sys/ioctl.h>
  #include <sys/conf.h>
  #include <sys/tty.h>
  #include <sys/fcntl.h>
  
  #include <dev/usb/usb.h>
  #include <dev/usb/usbhid.h>
  
  #include <dev/usb/usbdi.h>
  
  #include <dev/usb/uhidev.h>
  #include <dev/usb/uhid.h>
  
  int ujoy_match(struct device *, void *, void *);
  
  struct cfdriver ujoy_cd = {
  	NULL, "ujoy", DV_DULL
  };
  
  const struct cfattach ujoy_ca = {
  	sizeof(struct uhid_softc),
  	ujoy_match,
  	uhid_attach,
  	uhid_detach,
  };
  
  /*
   * XXX workaround:
   *
   * This is a copy of sys/dev/hid/hid.c:hid_is_collection(), synced up to the
   * NetBSD version.  Our current hid_is_collection() is not playing nice with
   * all HID devices like the PS4 controller.  But applying this version
   * globally breaks other HID devices like ims(4) and imt(4).  Until our global
   * hid_is_collection() can't be fixed to play nice with all HID devices, we
   * go for this dedicated ujoy(4) version.
   */
  int
  ujoy_hid_is_collection(const void *desc, int size, uint8_t id, int32_t usage)
  {
  	struct hid_data *hd;
  	struct hid_item hi;
  	uint32_t coll_usage = ~0;
  
  	hd = hid_start_parse(desc, size, hid_input);
  	if (hd == NULL)
  		return (0);
  
  	while (hid_get_item(hd, &hi)) {
  		if (hi.kind == hid_collection &&
  		    hi.collection == HCOLL_APPLICATION)
  			coll_usage = hi.usage;
  
  		if (hi.kind == hid_endcollection)
  			coll_usage = ~0;
  
  		if (hi.kind == hid_input &&
  		    coll_usage == usage &&
  		    hi.report_ID == id) {
  			hid_end_parse(hd);
  			return (1);
  		}
  	}
  	hid_end_parse(hd);
  
  	return (0);
  }
  
  int
  ujoy_match(struct device *parent, void *match, void *aux)
  {
  	struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)aux;
  	int			  size;
  	void			 *desc;
  	int			  ret = UMATCH_NONE;
  
  	if (UHIDEV_CLAIM_MULTIPLE_REPORTID(uha))
  		return (ret);
  
  	/* Find the general usage page and gamecontroller collections */
  	uhidev_get_report_desc(uha->parent, &desc, &size);
  
  	if (ujoy_hid_is_collection(desc, size, uha->reportid,
  	    HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_JOYSTICK)))
      		ret = UMATCH_IFACECLASS;
  
  	if (ujoy_hid_is_collection(desc, size, uha->reportid,
  	    HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_GAME_PAD)))
      		ret = UMATCH_IFACECLASS;
  
  	return (ret);
  }
  
  int
  ujoyopen(dev_t dev, int flag, int mode, struct proc *p)
  {
  	/* Restrict ujoy devices to read operations */
  	if ((flag & FWRITE))
      		return (EPERM);
  	return (uhid_do_open(dev, flag, mode, p));
  }
  
  int
  ujoyioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
  {
  	switch (cmd) {
  	case FIOASYNC:
  	case USB_GET_DEVICEINFO:
      	case USB_GET_REPORT:
      	case USB_GET_REPORT_DESC:
      	case USB_GET_REPORT_ID:
  		break;
  	default:
  		return (EPERM);
  	}
  
  	return (uhidioctl(dev, cmd, addr, flag, p));
  }