Add a UHID joystick driver (USB Joysticks/GamePads/etc.) as the

FreeBSD machdep joystick handling code.  Along with this, make a few
cleanups, and add a new switch, "-joyshift", which enables USB HID
numbering to start with the second gamepad.

The upshot of all this is that I can now play two-player games and
have second player on the gamepad.  Yay!

3 files changed, 418 insertions, 12 deletions

diff --git a/emulators/snes9x/Makefile b/emulators/snes9x/Makefile
index 065e0973ab3d..71defeabde98 100644
--- a/emulators/snes9x/Makefile
+++ b/emulators/snes9x/Makefile
@@ -27,6 +27,10 @@ MAKE_ENV=	CC="${CC}" CXX="${CXX}" CFLAGS="${CFLAGS}" \
 USE_ZIP=	YES
 WRKSRC=		${WRKDIR}/release
 
+.if exists(/usr/lib/libusb.a)
+MAKE_ENV+=	USB_JOYSTICK_SUPPORT=yes
+.endif
+
 ONLY_FOR_ARCHS=	i386 alpha
 
 .if ${MACHINE_ARCH} == alpha
diff --git a/emulators/snes9x/files/patch-aa b/emulators/snes9x/files/patch-aa
index f9b5126bf69d..4bf161cb863e 100644
--- a/emulators/snes9x/files/patch-aa
+++ b/emulators/snes9x/files/patch-aa
@@ -1,5 +1,5 @@
 --- Makefile.orig	Mon Oct  2 03:36:11 2000
-+++ Makefile	Fri Oct 13 20:56:31 2000
++++ Makefile	Sun Nov 19 01:59:35 2000
 @@ -3,7 +3,6 @@
  #SPC700ASM=1
  NETPLAY=1
@@ -53,7 +53,19 @@
  $(LINUXDEFINES) \
  $(FXDEFINES) \
  $(CPUDEFINES) \
-@@ -115,12 +107,12 @@
+@@ -108,6 +100,11 @@
+ $(GLIDEDEFINES) \
+ $(GUIDEFINES)
+ 
++ifdef USB_JOYSTICK_SUPPORT
++CCFLAGS += -DJOYSTICK_SUPPORT
++EXTRALIBS += -lusb
++endif
++
+ #-DSOUND
+ #-DDEBUGGER
+ #-DNO_INLINE_SET_GET
+@@ -115,12 +112,12 @@
  #-DCPU_SHUTDOWN
  #-DSPC700_SHUTDOWN
  
diff --git a/emulators/snes9x/files/patch-af b/emulators/snes9x/files/patch-af
index 54a57f28d494..fbc768902502 100644
--- a/emulators/snes9x/files/patch-af
+++ b/emulators/snes9x/files/patch-af
@@ -1,6 +1,5 @@
-diff -ru ../../work/release/unix/unix.cpp ./unix/unix.cpp
---- ../../work/release/unix/unix.cpp	Thu Sep 23 19:56:48 1999
-+++ ./unix/unix.cpp	Wed Dec 29 01:56:32 1999
+--- unix/unix.cpp.orig	Fri Oct  6 17:02:40 2000
++++ unix/unix.cpp	Sat Nov 18 23:12:45 2000
 @@ -49,9 +49,11 @@
  #include <ctype.h>
  
@@ -27,18 +26,94 @@ diff -ru ../../work/release/unix/unix.cpp ./unix/unix.cpp
  #include <sys/mman.h>
  #endif
  
-@@ -83,6 +89,10 @@
+@@ -83,6 +89,11 @@
  typedef void (*SIG_PF)();
  #endif
  
 +#if defined(__FreeBSD__)
 +typedef sig_t SIG_PF;
++#include <err.h>
 +#endif
 +
  #include "snes9x.h"
  #include "memmap.h"
  #include "debug.h"
-@@ -159,7 +169,7 @@
+@@ -109,7 +120,10 @@
+ int NumControllers = 5;
+ 
+ #ifdef JOYSTICK_SUPPORT
++#define	JOYSTICK_MAX_DEVICES	4
++int JoystickShift = 0;
+ #ifdef __linux
++#define	JOYSTICK_MAX_BUTTONS	4
+ #include <linux/joystick.h>
+ int js_fd [4] = {-1, -1, -1, -1};
+ int js_map_button [4][16] = {
+@@ -156,6 +170,63 @@
+ char *js_device [4] = {"/dev/js0", "/dev/js1", "/dev/js2", "/dev/js3"};
+ #endif
+ 
++#if defined(__FreeBSD__)
++#include <sys/types.h>
++
++extern "C" {
++#define class klass
++#include <dev/usb/usb.h>
++#include <dev/usb/usbhid.h>
++#undef class
++
++#include <libusb.h>
++}
++
++#define	JOYSTICK_MAX_BUTTONS	16
++
++#define JOYSTICK_MAP_BUTTON_INITIALIZER				\
++    {								\
++	SNES_Y_MASK, SNES_B_MASK, SNES_A_MASK,			\
++	SNES_X_MASK, SNES_TL_MASK, SNES_TR_MASK,		\
++	SNES_TL_MASK, SNES_TR_MASK,				\
++	SNES_SELECT_MASK, SNES_START_MASK, 0, 0, 0, 0, 0, 0	\
++    }
++
++int js_map_button[JOYSTICK_MAX_BUTTONS][16] = {
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER,
++	JOYSTICK_MAP_BUTTON_INITIALIZER
++};
++char *js_device [4] = {"/dev/uhid0", "/dev/uhid1", "/dev/uhid2", "/dev/uhid3"};
++struct js_range {
++	int min, max, lower_third, higher_third;
++};
++struct js_info {
++	char *buf;
++	int reportlen;
++	int offset;
++	struct js_range x, y;
++	int buttons;
++	struct hid_item *hids;
++	int fd;
++	int joy;
++} js_info[4];
++int js_count = 0;
++#endif
++
+ void InitJoysticks ();
+ void ReadJoysticks ();
+ #endif
+@@ -167,7 +238,7 @@
  char *rom_filename = NULL;
  char *snapshot_filename = NULL;
  
@@ -47,7 +122,134 @@ diff -ru ../../work/release/unix/unix.cpp ./unix/unix.cpp
  static void sigbrkhandler(int)
  {
  #ifdef DEBUGGER
-@@ -402,7 +412,7 @@
+@@ -194,91 +265,43 @@
+     if (strcmp (argv [i], "-j") == 0 ||
+ 	     strcasecmp (argv [i], "-nojoy") == 0)
+ 	Settings.JoystickEnabled = FALSE;
+-    else if (strcasecmp (argv [i], "-joydev1") == 0)
+-    {
+-	if (i + 1 < argc)
+-	    js_device[0] = argv[++i];
++#ifdef __FreeBSD__
++    else if (strcasecmp(argv[i], "-joyshift") == 0)
++	JoystickShift = 1;
++#endif
++    else if (strncasecmp(argv[i], "-joydev", sizeof("-joydev") - 1) == 0) {
++	char *end, *snum = argv[i] + sizeof("-joydev") - 1;
++	unsigned long num;
++
++	if (*snum == '\0' || argc < i + 1)
++		S9xUsage();
++	if ((num = strtoul(snum, &end, 10)) < JOYSTICK_MAX_DEVICES &&
++	    num > 0 && *end == '\0')
++		js_device[num - 1] = argv[++i];
+ 	else
+-	    S9xUsage ();
++		S9xUsage();
+     }
+-    else if (strcasecmp (argv [i], "-joydev2") == 0)
+-    {
+-	if (i + 1 < argc)
+-	    js_device[1] = argv[++i];
+-	else
+-	    S9xUsage ();
+-    }
+-    else if (strcasecmp (argv [i], "-joymap1") == 0)
+-    {
+-	if (i + 8 < argc)
+-	{
+-	    int t;
+-
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_A_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_B_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_X_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_Y_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_TL_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_TR_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_START_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [0][t] = SNES_SELECT_MASK;
+-	}
+-	else
+-	    S9xUsage ();
+-    }
+-    else if (strcasecmp (argv [i], "-joymap2") == 0)
+-    {
+-	if (i + 8 < argc)
+-	{
+-	    int t;
+-
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_A_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_B_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_X_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_Y_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_TL_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_TR_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_START_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [1][t] = SNES_SELECT_MASK;
+-	}
+-	else
+-	    S9xUsage ();
+-    }
+-    else if (strcasecmp (argv [i], "-joymap3") == 0)
+-    {
+-	if (i + 8 < argc)
+-	{
+-	    int t;
+-
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_A_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_B_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_X_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_Y_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_TL_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_TR_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_START_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [2][t] = SNES_SELECT_MASK;
+-	}
+-	else
+-	    S9xUsage ();
+-    }
+-    else if (strcasecmp (argv [i], "-joymap4") == 0)
+-    {
+-	if (i + 8 < argc)
+-	{
+-	    int t;
+-
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_A_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_B_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_X_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_Y_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_TL_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_TR_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_START_MASK;
+-	    if ((t = atoi (argv [++i])) < 15) js_map_button [3][t] = SNES_SELECT_MASK;
+-	}
+-	else
+-	    S9xUsage ();
++    else if (strncasecmp(argv[i], "-joymap", sizeof("-joymap") - 1) == 0) {
++	static const int button_masks[] = {
++		SNES_A_MASK, SNES_B_MASK, SNES_X_MASK, SNES_Y_MASK,
++		SNES_TL_MASK, SNES_TR_MASK, SNES_START_MASK, SNES_SELECT_MASK
++	};
++	char *end, *snum = argv[i] + sizeof("-joymap") - 1;
++	unsigned long num;
++	int *js_buttons, b;
++
++	if (argc < i + (sizeof(button_masks) / sizeof(int)) || *snum == '\0')
++		S9xUsage();
++	num = strtoul(snum, &end, 10);
++	if (*end != '\0')
++		S9xUsage();
++	if (num == 0 || num > 4)	/* hardcode: max joysticks */
++		S9xUsage();
++	js_buttons = js_map_button[num - 1];
++	for (b = 0; b < (sizeof(button_masks) / sizeof(int)); b++)
++		if ((num = strtoul(argv[++i], &end, 10)) <= 16 && num != 0 &&
++		    *end == '\0')
++			js_buttons[num - 1] = button_masks[b];
+     }
+     else 
+ #endif
+@@ -415,7 +438,7 @@
  #if !defined(__MSDOS) && defined(DEBUGGER)
  #if defined(__unix) && !defined(__NeXT__)
      struct sigaction sa;
@@ -56,7 +258,195 @@ diff -ru ../../work/release/unix/unix.cpp ./unix/unix.cpp
      sa.sa_handler = sigbrkhandler;
  #else
      sa.sa_handler = (SIG_PF) sigbrkhandler;
-@@ -1397,7 +1407,7 @@
+@@ -618,6 +641,7 @@
+ }
+ 
+ #ifdef JOYSTICK_SUPPORT
++#ifdef linux
+ void InitJoysticks ()
+ {
+ #ifdef JSIOCGVERSION
+@@ -738,6 +762,179 @@
+     }
+ #endif
+ }
++#endif
++#if defined(__FreeBSD__)
++
++/*
++ * USB HID code for FreeBSD/NetBSD
++ * Brian Feldman <green@FreeBSD.org>
++ *
++ * Reference used:
++ * X-Mame USB HID joystick driver for NetBSD.
++ *
++ * Written by Krister Walfridsson <cato@df.lth.se>
++ */
++
++int
++InitJoystickFd(int fd, char *dev) {
++	report_desc_t rd;
++	struct hid_data *d;
++	struct hid_item h, new_h;
++	struct js_info *my_info;
++	int reportlen, report_id, is_joystick;
++
++	my_info = &js_info[js_count];
++	rd = hid_get_report_desc(fd);
++	if (rd == 0) {
++		warn("%s", dev);
++		return (-1);
++	}
++	reportlen = hid_report_size(rd, hid_input, &report_id);
++	my_info->buf = (char *)malloc(reportlen);
++	if (my_info->buf == NULL)
++		err(1, "malloc");
++	my_info->reportlen = reportlen;
++	my_info->offset = report_id != 0;
++	my_info->buttons = 0;
++	my_info->hids = NULL;
++
++	is_joystick = 0;
++	for (d = hid_start_parse(rd, 1 << hid_input); hid_get_item(d, &h);) {
++		int usage, page, link_it = 0;
++		struct js_range *axis;
++
++		page = HID_PAGE(h.usage);
++		usage = HID_USAGE(h.usage);
++		if (!is_joystick)
++			is_joystick = (h.kind == hid_collection &&
++			    page == HUP_GENERIC_DESKTOP &&
++			    (usage == HUG_JOYSTICK || usage == HUG_GAME_PAD));
++		if (h.kind != hid_input || !is_joystick)
++			continue;
++		axis = NULL;
++		if (page == HUP_GENERIC_DESKTOP) {
++			switch (usage) {
++			case HUG_X:
++			case HUG_RX:
++				axis = &my_info->x;
++				break;
++			case HUG_Y:
++			case HUG_RY:
++				axis = &my_info->y;
++				break;
++			}
++		}
++		if (axis != NULL) {
++			axis->min = h.logical_minimum;
++			axis->max = h.logical_maximum;
++			axis->lower_third = axis->min +
++			   (axis->max - axis->min) / 3;
++			axis->higher_third = axis->min +
++			   (axis->max - axis->min) * 2 / 3;
++			link_it = 1;
++		}
++		if (!link_it) {
++			if (page != HUP_BUTTON || usage > 16)
++				continue;
++			if (usage > my_info->buttons)
++				my_info->buttons = usage;
++		}
++		new_h = h;
++		new_h.next = my_info->hids;
++		my_info->hids = (struct hid_item *)
++		    malloc(sizeof(*my_info->hids));
++		if (my_info->hids == NULL)
++			err(1, "malloc");
++		*my_info->hids = new_h;
++	}
++	printf("Joystick %s: %d buttons, X range %d - %d, Y range %d - %d\n",
++	    dev, my_info->buttons, my_info->x.min, my_info->x.max,
++	    my_info->y.min, my_info->y.max);
++	my_info->fd = fd;
++	if (JoystickShift) {
++		my_info->joy = js_count + 1;
++	} else
++		my_info->joy = js_count;
++	return (0);
++}
++
++void
++InitJoysticks() {
++	int i, fd;
++
++	for (i = 0; i < (sizeof(js_device) / sizeof(js_device[0])); i++) {
++		fd = open(js_device[i], O_RDONLY | O_NONBLOCK);
++		if (fd == -1)
++			continue;
++		if (InitJoystickFd(fd, js_device[i]) == 0)
++			js_count++;
++		else
++			close(fd);
++	}
++}
++
++void
++ReadJoysticks() {
++	struct hid_item *h;
++	int page, usage, njoy, joy;
++
++	for (njoy = 0; njoy < js_count; njoy++) {
++		struct js_info *jsi;
++
++		jsi = &js_info[njoy];
++		joy = jsi->joy;
++
++		if (read(jsi->fd, jsi->buf, jsi->reportlen) != jsi->reportlen)
++			continue;
++		for (h = jsi->hids; h != NULL; h = h->next) {
++			int d;
++
++			d = hid_get_data(jsi->buf + jsi->offset, h);
++			page = HID_PAGE(h->usage);
++			usage = HID_USAGE(h->usage);
++
++			switch (page) {
++			case HUP_GENERIC_DESKTOP:
++				switch (usage) {
++				case HUG_X:
++				case HUG_RX:
++					if (d < jsi->x.lower_third) {
++						joypads[joy] |= SNES_LEFT_MASK;
++						joypads[joy] &= ~SNES_RIGHT_MASK;
++					} else if (d < jsi->x.higher_third) {
++						joypads[joy] &= ~SNES_LEFT_MASK;
++						joypads[joy] &= ~SNES_RIGHT_MASK;
++					} else {
++						joypads[joy] &= ~SNES_LEFT_MASK;
++						joypads[joy] |= SNES_RIGHT_MASK;
++					}
++					break;
++				case HUG_Y:
++				case HUG_RY:
++					if (d < jsi->y.lower_third) {
++						joypads[joy] |= SNES_UP_MASK;
++						joypads[joy] &= ~SNES_DOWN_MASK;
++					} else if (d < jsi->y.higher_third) {
++						joypads[joy] &= ~SNES_UP_MASK;
++						joypads[joy] &= ~SNES_DOWN_MASK;
++					} else {
++						joypads[joy] &= ~SNES_UP_MASK;
++						joypads[joy] |= SNES_DOWN_MASK;
++					}
++					break;
++				}
++				break;
++			case HUP_BUTTON:
++				if (d)
++					joypads[joy] |= js_map_button[njoy][usage - 1];
++				else
++					joypads[joy] &= ~js_map_button[njoy][usage - 1];
++				break;
++			}
++		}
++	}
++}
++#endif // defined(__FreeBSD__)
+ #endif // defined (JOYSTICK_SUPPORT)
+ 
+ const char *GetHomeDirectory ()
+@@ -1427,7 +1624,7 @@
  }
  #endif
  
@@ -65,7 +455,7 @@ diff -ru ../../work/release/unix/unix.cpp ./unix/unix.cpp
  static int Rates[8] =
  {
      0, 8192, 11025, 16500, 22050, 29300, 36600, 44000
-@@ -1514,7 +1524,7 @@
+@@ -1546,7 +1743,7 @@
  }
  #endif
  
@@ -74,12 +464,12 @@ diff -ru ../../work/release/unix/unix.cpp ./unix/unix.cpp
  void S9xUnixProcessSound (void)
  {
  }
-@@ -1613,7 +1623,7 @@
+@@ -1645,7 +1842,7 @@
  
  void *S9xProcessSound (void *)
  {
 -#ifdef __linux
 +#if defined(__linux) || defined(__FreeBSD__)
      audio_buf_info info;
-     count_info count;
  
+     if (!Settings.ThreadSound &&