src/joystick/bsd/SDL_sysjoystick.c
author Sam Lantinga <slouken@libsdl.org>
Sat, 10 Oct 2009 09:43:50 +0000
branchSDL-1.2
changeset 4307 f4ee83767bfd
parent 4306 aa6aac8a5243
child 4323 b3171b7561d8
permissions -rw-r--r--
Don't double-include sys/param.h
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2009 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#ifdef SDL_JOYSTICK_USBHID
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/*
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 * Joystick driver for the uhid(4) interface found in OpenBSD,
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 * NetBSD and FreeBSD.
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 *
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 * Maintainer: <vedge at csoft.org>
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 */
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#include <sys/param.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#ifndef __FreeBSD_kernel_version
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#define __FreeBSD_kernel_version __FreeBSD_version
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#endif
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#if defined(HAVE_USB_H)
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#include <usb.h>
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#endif
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#ifdef __DragonFly__
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#include <bus/usb/usb.h>
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#include <bus/usb/usbhid.h>
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#else
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#include <dev/usb/usb.h>
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#include <dev/usb/usbhid.h>
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#endif
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#if defined(HAVE_USBHID_H)
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#include <usbhid.h>
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#elif defined(HAVE_LIBUSB_H)
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#include <libusb.h>
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#elif defined(HAVE_LIBUSBHID_H)
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#include <libusbhid.h>
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#endif
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#ifdef __FREEBSD__
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#ifndef __DragonFly__
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#include <osreldate.h>
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#endif
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#include <sys/joystick.h>
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#endif
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#if SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H
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#include <machine/joystick.h>
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#endif
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#include "SDL_joystick.h"
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#include "../SDL_sysjoystick.h"
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#include "../SDL_joystick_c.h"
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#define MAX_UHID_JOYS	4
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#define MAX_JOY_JOYS	2
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#define MAX_JOYS	(MAX_UHID_JOYS + MAX_JOY_JOYS)
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struct report {
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	struct	usb_ctl_report *buf;	/* Buffer */
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	size_t	size;			/* Buffer size */
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	int	rid;			/* Report ID */
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	enum {
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		SREPORT_UNINIT,
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		SREPORT_CLEAN,
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		SREPORT_DIRTY
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	} status;
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};
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static struct {
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	int	uhid_report;
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	hid_kind_t kind;
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	const	char *name;
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} const repinfo[] = {
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	{ UHID_INPUT_REPORT,	hid_input,	"input" },
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	{ UHID_OUTPUT_REPORT,	hid_output,	"output" },
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	{ UHID_FEATURE_REPORT,	hid_feature,	"feature" }
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};
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enum {
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	REPORT_INPUT = 0,
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	REPORT_OUTPUT = 1,
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	REPORT_FEATURE = 2
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};
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enum {
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	JOYAXE_X,
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	JOYAXE_Y,
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	JOYAXE_Z,
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	JOYAXE_SLIDER,
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	JOYAXE_WHEEL,
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	JOYAXE_RX,
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	JOYAXE_RY,
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	JOYAXE_RZ,
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	JOYAXE_count
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};
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struct joystick_hwdata {
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	int	fd;
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	char	*path;
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	enum {
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		BSDJOY_UHID,	/* uhid(4) */
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		BSDJOY_JOY	/* joy(4) */
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	} type;
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	struct	report_desc *repdesc;
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	struct	report inreport;
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	int	axis_map[JOYAXE_count];	/* map present JOYAXE_* to 0,1,..*/
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	int	x;
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	int	y;
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	int	xmin;
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	int	ymin;
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	int	xmax;
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	int	ymax;
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};
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static char *joynames[MAX_JOYS];
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static char *joydevnames[MAX_JOYS];
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static int	report_alloc(struct report *, struct report_desc *, int);
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static void	report_free(struct report *);
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#ifdef USBHID_UCR_DATA
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#define REP_BUF_DATA(rep) ((rep)->buf->ucr_data)
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#else
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#define REP_BUF_DATA(rep) ((rep)->buf->data)
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#endif
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int
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SDL_SYS_JoystickInit(void)
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{
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	char s[16];
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	int i, fd;
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	SDL_numjoysticks = 0;
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	SDL_memset(joynames, 0, sizeof(joynames));
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	SDL_memset(joydevnames, 0, sizeof(joydevnames));
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	for (i = 0; i < MAX_UHID_JOYS; i++) {
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		SDL_Joystick nj;
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		SDL_snprintf(s, SDL_arraysize(s), "/dev/uhid%d", i);
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		nj.index = SDL_numjoysticks;
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		joynames[nj.index] = strdup(s);
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		if (SDL_SYS_JoystickOpen(&nj) == 0) {
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			SDL_SYS_JoystickClose(&nj);
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			SDL_numjoysticks++;
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		} else {
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			SDL_free(joynames[nj.index]);
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			joynames[nj.index] = NULL;
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		}
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	}
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	for (i = 0; i < MAX_JOY_JOYS; i++) {
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		SDL_snprintf(s, SDL_arraysize(s), "/dev/joy%d", i);
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		fd = open(s, O_RDONLY);
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		if (fd != -1) {
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			joynames[SDL_numjoysticks++] = strdup(s);
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			close(fd);
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		}
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	}
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	/* Read the default USB HID usage table. */
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	hid_init(NULL);
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	return (SDL_numjoysticks);
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}
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const char *
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SDL_SYS_JoystickName(int index)
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{
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	if (joydevnames[index] != NULL) {
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		return (joydevnames[index]);
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	}
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	return (joynames[index]);
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}
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static int
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usage_to_joyaxe(unsigned usage)
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{
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    int joyaxe;
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    switch (usage) {
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    case HUG_X:
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	joyaxe = JOYAXE_X; break;
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    case HUG_Y:
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	joyaxe = JOYAXE_Y; break;
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    case HUG_Z:
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	joyaxe = JOYAXE_Z; break;
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    case HUG_SLIDER:
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	joyaxe = JOYAXE_SLIDER; break;
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    case HUG_WHEEL:
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	joyaxe = JOYAXE_WHEEL; break;
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    case HUG_RX:
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	joyaxe = JOYAXE_RX; break;
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    case HUG_RY:
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	joyaxe = JOYAXE_RY; break;
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    case HUG_RZ:
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	joyaxe = JOYAXE_RZ; break;
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    default:
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	joyaxe = -1;
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    }
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    return joyaxe;    
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}
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static unsigned
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hatval_to_sdl(Sint32 hatval)
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{
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    static const unsigned hat_dir_map[8] = {
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	SDL_HAT_UP, SDL_HAT_RIGHTUP, SDL_HAT_RIGHT, SDL_HAT_RIGHTDOWN, 
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	SDL_HAT_DOWN, SDL_HAT_LEFTDOWN, SDL_HAT_LEFT, SDL_HAT_LEFTUP
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    };
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    unsigned result;
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    if ((hatval & 7) == hatval) 
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	result = hat_dir_map[hatval];
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    else 
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	result = SDL_HAT_CENTERED;
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    return result;
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}
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int
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SDL_SYS_JoystickOpen(SDL_Joystick *joy)
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{
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	char *path = joynames[joy->index];
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	struct joystick_hwdata *hw;
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	struct hid_item hitem;
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	struct hid_data *hdata;
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	struct report *rep;
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	int fd;
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	int i;
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	fd = open(path, O_RDONLY);
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	if (fd == -1) {
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		SDL_SetError("%s: %s", path, strerror(errno));
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		return (-1);
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	}
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	hw = (struct joystick_hwdata *)SDL_malloc(sizeof(struct joystick_hwdata));
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	if (hw == NULL) {
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		SDL_OutOfMemory();
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		close(fd);
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		return (-1);
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	}
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	joy->hwdata = hw;
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	hw->fd = fd;
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	hw->path = strdup(path);
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	hw->x = 0;
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	hw->y = 0;
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	hw->xmin = 0xffff;
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	hw->ymin = 0xffff;
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	hw->xmax = 0;
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	hw->ymax = 0;
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	if (! SDL_strncmp(path, "/dev/joy", 8)) {
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		hw->type = BSDJOY_JOY;
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		joy->naxes = 2;
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		joy->nbuttons = 2;
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		joy->nhats = 0;
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		joy->nballs = 0;
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		joydevnames[joy->index] = strdup("Gameport joystick");
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		goto usbend;
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	} else {
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		hw->type = BSDJOY_UHID;
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	}
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	{
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	    int ax;
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	    for (ax = 0; ax < JOYAXE_count; ax++)
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		hw->axis_map[ax] = -1;
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	}
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   293
	hw->repdesc = hid_get_report_desc(fd);
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	if (hw->repdesc == NULL) {
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   295
		SDL_SetError("%s: USB_GET_REPORT_DESC: %s", hw->path,
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   296
		    strerror(errno));
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   297
		goto usberr;
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   298
	}
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   299
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   300
	rep = &hw->inreport;
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	if (ioctl(fd, USB_GET_REPORT_ID, &rep->rid) < 0) {
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		rep->rid = -1; /* XXX */
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	}
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   304
	if (report_alloc(rep, hw->repdesc, REPORT_INPUT) < 0) {
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   305
		goto usberr;
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   306
	}
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   307
	if (rep->size <= 0) {
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   308
		SDL_SetError("%s: Input report descriptor has invalid length",
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   309
		    hw->path);
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   310
		goto usberr;
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   311
	}
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   312
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   313
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_kernel_version >= 500111)
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	hdata = hid_start_parse(hw->repdesc, 1 << hid_input, rep->rid);
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#else
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   316
	hdata = hid_start_parse(hw->repdesc, 1 << hid_input);
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   317
#endif
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   318
	if (hdata == NULL) {
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   319
		SDL_SetError("%s: Cannot start HID parser", hw->path);
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   320
		goto usberr;
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   321
	}
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   322
	joy->naxes = 0;
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   323
	joy->nbuttons = 0;
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   324
	joy->nhats = 0;
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   325
	joy->nballs = 0;
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   326
	for (i=0; i<JOYAXE_count; i++)
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   327
		hw->axis_map[i] = -1;
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   328
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   329
	while (hid_get_item(hdata, &hitem) > 0) {
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   330
		char *sp;
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   331
		const char *s;
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   332
slouken@278
   333
		switch (hitem.kind) {
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   334
		case hid_collection:
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   335
			switch (HID_PAGE(hitem.usage)) {
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   336
			case HUP_GENERIC_DESKTOP:
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   337
				switch (HID_USAGE(hitem.usage)) {
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   338
				case HUG_JOYSTICK:
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   339
				case HUG_GAME_PAD:
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   340
					s = hid_usage_in_page(hitem.usage);
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   341
					sp = SDL_malloc(SDL_strlen(s) + 5);
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   342
					SDL_snprintf(sp, SDL_strlen(s) + 5, "%s (%d)", s,
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   343
					    joy->index);
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   344
					joydevnames[joy->index] = sp;
slouken@278
   345
				}
slouken@278
   346
			}
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   347
			break;
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   348
		case hid_input:
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   349
			switch (HID_PAGE(hitem.usage)) {
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   350
			case HUP_GENERIC_DESKTOP: {
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   351
			    unsigned usage = HID_USAGE(hitem.usage);
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   352
			    int joyaxe = usage_to_joyaxe(usage);
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   353
			    if (joyaxe >= 0) {
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   354
				hw->axis_map[joyaxe] = 1;
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   355
			    } else if (usage == HUG_HAT_SWITCH) {
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   356
				joy->nhats++;
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   357
			    }
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   358
			    break;
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   359
			}
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   360
			case HUP_BUTTON:
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   361
				joy->nbuttons++;
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   362
				break;
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   363
			default:
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   364
				break;
slouken@278
   365
			}
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   366
			break;
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   367
		default:
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   368
			break;
slouken@278
   369
		}
slouken@278
   370
	}
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   371
	hid_end_parse(hdata);
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   372
	for (i=0; i<JOYAXE_count; i++)
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   373
		if (hw->axis_map[i] > 0)
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   374
			hw->axis_map[i] = joy->naxes++;
slouken@278
   375
slouken@776
   376
usbend:
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   377
	/* The poll blocks the event thread. */
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   378
	fcntl(fd, F_SETFL, O_NONBLOCK);
slouken@278
   379
slouken@278
   380
	return (0);
slouken@278
   381
usberr:
slouken@278
   382
	close(hw->fd);
slouken@1336
   383
	SDL_free(hw->path);
slouken@1336
   384
	SDL_free(hw);
slouken@278
   385
	return (-1);
slouken@278
   386
}
slouken@278
   387
slouken@278
   388
void
slouken@278
   389
SDL_SYS_JoystickUpdate(SDL_Joystick *joy)
slouken@278
   390
{
slouken@381
   391
	struct hid_item hitem;
slouken@381
   392
	struct hid_data *hdata;
slouken@381
   393
	struct report *rep;
slouken@358
   394
	int nbutton, naxe = -1;
slouken@307
   395
	Sint32 v;
slouken@776
   396
slouken@1565
   397
#if defined(__FREEBSD__) || SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H
slouken@776
   398
	struct joystick gameport;
slouken@776
   399
 
slouken@776
   400
	if (joy->hwdata->type == BSDJOY_JOY) {
slouken@776
   401
		if (read(joy->hwdata->fd, &gameport, sizeof gameport) != sizeof gameport)
slouken@776
   402
			return;
slouken@4022
   403
		if (abs(joy->hwdata->x - gameport.x) > 8) {
slouken@4022
   404
			joy->hwdata->x = gameport.x;
slouken@4022
   405
			if (joy->hwdata->x < joy->hwdata->xmin) {
slouken@4022
   406
				joy->hwdata->xmin = joy->hwdata->x;
slouken@776
   407
			}
slouken@4022
   408
			if (joy->hwdata->x > joy->hwdata->xmax) {
slouken@4022
   409
				joy->hwdata->xmax = joy->hwdata->x;
slouken@776
   410
			}
slouken@4022
   411
			if (joy->hwdata->xmin == joy->hwdata->xmax) {
slouken@4022
   412
				joy->hwdata->xmin--;
slouken@4022
   413
				joy->hwdata->xmax++;
slouken@776
   414
			}
slouken@4022
   415
			v = (Sint32)joy->hwdata->x;
slouken@4022
   416
			v -= (joy->hwdata->xmax + joy->hwdata->xmin + 1)/2;
slouken@4022
   417
			v *= 32768/((joy->hwdata->xmax - joy->hwdata->xmin + 1)/2);
slouken@776
   418
			SDL_PrivateJoystickAxis(joy, 0, v);
slouken@776
   419
		}
slouken@4022
   420
		if (abs(joy->hwdata->y - gameport.y) > 8) {
slouken@4022
   421
			joy->hwdata->y = gameport.y;
slouken@4022
   422
			if (joy->hwdata->y < joy->hwdata->ymin) {
slouken@4022
   423
				joy->hwdata->ymin = joy->hwdata->y;
slouken@776
   424
			}
slouken@4022
   425
			if (joy->hwdata->y > joy->hwdata->ymax) {
slouken@4022
   426
				joy->hwdata->ymax = joy->hwdata->y;
slouken@776
   427
			}
slouken@4022
   428
			if (joy->hwdata->ymin == joy->hwdata->ymax) {
slouken@4022
   429
				joy->hwdata->ymin--;
slouken@4022
   430
				joy->hwdata->ymax++;
slouken@776
   431
			}
slouken@4022
   432
			v = (Sint32)joy->hwdata->y;
slouken@4022
   433
			v -= (joy->hwdata->ymax + joy->hwdata->ymin + 1)/2;
slouken@4022
   434
			v *= 32768/((joy->hwdata->ymax - joy->hwdata->ymin + 1)/2);
slouken@776
   435
			SDL_PrivateJoystickAxis(joy, 1, v);
slouken@776
   436
		}
slouken@776
   437
		if (gameport.b1 != joy->buttons[0]) {
slouken@776
   438
			SDL_PrivateJoystickButton(joy, 0, gameport.b1);
slouken@776
   439
		}
slouken@776
   440
		if (gameport.b2 != joy->buttons[1]) {
slouken@776
   441
			SDL_PrivateJoystickButton(joy, 1, gameport.b2);
slouken@776
   442
		}
slouken@776
   443
		return;
slouken@776
   444
	}
slouken@1565
   445
#endif /* defined(__FREEBSD__) || SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H */
slouken@278
   446
	
slouken@278
   447
	rep = &joy->hwdata->inreport;
slouken@381
   448
slouken@381
   449
	if (read(joy->hwdata->fd, REP_BUF_DATA(rep), rep->size) != rep->size) {
slouken@278
   450
		return;
slouken@278
   451
	}
slouken@4305
   452
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_kernel_version >= 500111)
slouken@407
   453
	hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input, rep->rid);
slouken@407
   454
#else
slouken@278
   455
	hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input);
slouken@407
   456
#endif
slouken@278
   457
	if (hdata == NULL) {
slouken@278
   458
		fprintf(stderr, "%s: Cannot start HID parser\n",
slouken@278
   459
		    joy->hwdata->path);
slouken@278
   460
		return;
slouken@278
   461
	}
slouken@278
   462
slouken@307
   463
	for (nbutton = 0; hid_get_item(hdata, &hitem) > 0;) {
slouken@278
   464
		switch (hitem.kind) {
slouken@278
   465
		case hid_input:
slouken@278
   466
			switch (HID_PAGE(hitem.usage)) {
slouken@632
   467
			case HUP_GENERIC_DESKTOP: {
slouken@632
   468
			    unsigned usage = HID_USAGE(hitem.usage);
slouken@632
   469
			    int joyaxe = usage_to_joyaxe(usage);
slouken@632
   470
			    if (joyaxe >= 0) {
slouken@632
   471
				naxe = joy->hwdata->axis_map[joyaxe];
slouken@632
   472
				/* scaleaxe */
slouken@381
   473
				v = (Sint32)hid_get_data(REP_BUF_DATA(rep),
slouken@632
   474
							 &hitem);
slouken@461
   475
				v -= (hitem.logical_maximum + hitem.logical_minimum + 1)/2;
slouken@461
   476
				v *= 32768/((hitem.logical_maximum - hitem.logical_minimum + 1)/2);
slouken@307
   477
				if (v != joy->axes[naxe]) {
slouken@632
   478
				    SDL_PrivateJoystickAxis(joy, naxe, v);
slouken@278
   479
				}
slouken@632
   480
			    } else if (usage == HUG_HAT_SWITCH) {
slouken@632
   481
				v = (Sint32)hid_get_data(REP_BUF_DATA(rep),
slouken@632
   482
							 &hitem);
slouken@1565
   483
				SDL_PrivateJoystickHat(joy, 0,
slouken@1565
   484
					hatval_to_sdl(v)-hitem.logical_minimum);
slouken@632
   485
			    }
slouken@632
   486
			    break;
slouken@632
   487
			}
slouken@278
   488
			case HUP_BUTTON:
slouken@381
   489
				v = (Sint32)hid_get_data(REP_BUF_DATA(rep),
slouken@307
   490
				    &hitem);
slouken@278
   491
				if (joy->buttons[nbutton] != v) {
slouken@278
   492
					SDL_PrivateJoystickButton(joy,
slouken@278
   493
					    nbutton, v);
slouken@278
   494
				}
slouken@278
   495
				nbutton++;
slouken@278
   496
				break;
slouken@405
   497
			default:
slouken@405
   498
				continue;
slouken@278
   499
			}
slouken@278
   500
			break;
slouken@278
   501
		default:
slouken@278
   502
			break;
slouken@278
   503
		}
slouken@278
   504
	}
slouken@278
   505
	hid_end_parse(hdata);
slouken@278
   506
slouken@278
   507
	return;
slouken@278
   508
}
slouken@278
   509
slouken@278
   510
/* Function to close a joystick after use */
slouken@278
   511
void
slouken@278
   512
SDL_SYS_JoystickClose(SDL_Joystick *joy)
slouken@278
   513
{
slouken@1336
   514
	if (SDL_strncmp(joy->hwdata->path, "/dev/joy", 8))	{
slouken@776
   515
		report_free(&joy->hwdata->inreport);
slouken@776
   516
		hid_dispose_report_desc(joy->hwdata->repdesc);
slouken@776
   517
	}
slouken@278
   518
	close(joy->hwdata->fd);
slouken@1336
   519
	SDL_free(joy->hwdata->path);
slouken@1336
   520
	SDL_free(joy->hwdata);
slouken@278
   521
slouken@278
   522
	return;
slouken@278
   523
}
slouken@278
   524
slouken@278
   525
void
slouken@278
   526
SDL_SYS_JoystickQuit(void)
slouken@278
   527
{
slouken@278
   528
	int i;
slouken@278
   529
slouken@278
   530
	for (i = 0; i < MAX_JOYS; i++) {
slouken@278
   531
		if (joynames[i] != NULL)
slouken@1336
   532
			SDL_free(joynames[i]);
slouken@278
   533
		if (joydevnames[i] != NULL)
slouken@1336
   534
			SDL_free(joydevnames[i]);
slouken@278
   535
	}
slouken@278
   536
slouken@278
   537
	return;
slouken@278
   538
}
slouken@278
   539
slouken@278
   540
static int
slouken@278
   541
report_alloc(struct report *r, struct report_desc *rd, int repind)
slouken@278
   542
{
slouken@278
   543
	int len;
slouken@278
   544
slouken@1565
   545
#ifdef __DragonFly__
slouken@1565
   546
	len = hid_report_size(rd, r->rid, repinfo[repind].kind);
slouken@1565
   547
#elif __FREEBSD__
slouken@4305
   548
# if (__FreeBSD_kernel_version >= 460000) || defined(__FreeBSD_kernel__)
slouken@4305
   549
#  if (__FreeBSD_kernel_version <= 500111)
slouken@552
   550
	len = hid_report_size(rd, r->rid, repinfo[repind].kind);
slouken@611
   551
#  else
slouken@611
   552
	len = hid_report_size(rd, repinfo[repind].kind, r->rid);
slouken@611
   553
#  endif
slouken@552
   554
# else
icculus@426
   555
	len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
slouken@1565
   556
# endif
slouken@552
   557
#else
slouken@552
   558
# ifdef USBHID_NEW
slouken@1565
   559
	len = hid_report_size(rd, repinfo[repind].kind, r->rid);
slouken@1565
   560
# else
slouken@552
   561
	len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
slouken@552
   562
# endif
slouken@552
   563
#endif
slouken@552
   564
slouken@278
   565
	if (len < 0) {
slouken@278
   566
		SDL_SetError("Negative HID report size");
slouken@278
   567
		return (-1);
slouken@278
   568
	}
slouken@278
   569
	r->size = len;
slouken@278
   570
slouken@278
   571
	if (r->size > 0) {
slouken@1336
   572
		r->buf = SDL_malloc(sizeof(*r->buf) - sizeof(REP_BUF_DATA(r)) +
slouken@278
   573
		    r->size);
slouken@278
   574
		if (r->buf == NULL) {
slouken@278
   575
			SDL_OutOfMemory();
slouken@278
   576
			return (-1);
slouken@278
   577
		}
slouken@278
   578
	} else {
slouken@278
   579
		r->buf = NULL;
slouken@278
   580
	}
slouken@278
   581
slouken@278
   582
	r->status = SREPORT_CLEAN;
slouken@278
   583
	return (0);
slouken@278
   584
}
slouken@278
   585
slouken@278
   586
static void
slouken@278
   587
report_free(struct report *r)
slouken@278
   588
{
slouken@278
   589
	if (r->buf != NULL) {
slouken@1336
   590
		SDL_free(r->buf);
slouken@278
   591
	}
slouken@278
   592
	r->status = SREPORT_UNINIT;
slouken@278
   593
}
slouken@278
   594
slouken@1635
   595
#endif /* SDL_JOYSTICK_USBHID */