2 files changed, 342 insertions, 0 deletions
diff --git a/frontend/gp2x/in_gp2x.c b/frontend/gp2x/in_gp2x.c
new file mode 100644
index 0000000..b750e68
--- /dev/null
+++ b/frontend/gp2x/in_gp2x.c
@@ -0,0 +1,324 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "../common/input.h"
+#include "in_gp2x.h"
+
+#define IN_GP2X_PREFIX "gp2x:"
+#define IN_GP2X_NBUTTONS 32
+
+/* note: in_gp2x hadles combos (if 2 btns have the same bind,
+ * both must be pressed for action to happen) */
+static int in_gp2x_combo_keys = 0;
+static int in_gp2x_combo_acts = 0;
+static int gpiodev = -1;	/* Wiz only */
+
+static int (*in_gp2x_get_bits)(void);
+
+static const char *in_gp2x_keys[IN_GP2X_NBUTTONS] = {
+	[0 ... IN_GP2X_NBUTTONS-1] = NULL,
+	[GP2X_BTN_UP]    = "Up",    [GP2X_BTN_LEFT]   = "Left",
+	[GP2X_BTN_DOWN]  = "Down",  [GP2X_BTN_RIGHT]  = "Right",
+	[GP2X_BTN_START] = "Start", [GP2X_BTN_SELECT] = "Select",
+	[GP2X_BTN_L]     = "L",     [GP2X_BTN_R]      = "R",
+	[GP2X_BTN_A]     = "A",     [GP2X_BTN_B]      = "B",
+	[GP2X_BTN_X]     = "X",     [GP2X_BTN_Y]      = "Y",
+	[GP2X_BTN_VOL_DOWN] = "VOL DOWN",
+	[GP2X_BTN_VOL_UP]   = "VOL UP",
+	[GP2X_BTN_PUSH]     = "PUSH"
+};
+
+
+static int in_gp2x_get_mmsp2_bits(void)
+{
+	extern volatile unsigned short *gp2x_memregs;
+	int value;
+	value = gp2x_memregs[0x1198>>1] & 0xff; // GPIO M
+	if (value == 0xFD) value = 0xFA;
+	if (value == 0xF7) value = 0xEB;
+	if (value == 0xDF) value = 0xAF;
+	if (value == 0x7F) value = 0xBE;
+	value |= gp2x_memregs[0x1184>>1] & 0xFF00; // GPIO C
+	value |= gp2x_memregs[0x1186>>1] << 16; // GPIO D
+	value = ~value & 0x08c0ff55;
+
+	return value;
+}
+
+static int in_gp2x_get_wiz_bits(void)
+{
+	int r, value = 0;
+	r = read(gpiodev, &value, 4);
+	if (value & 0x02)
+		value |= 0x05;
+	if (value & 0x08)
+		value |= 0x14;
+	if (value & 0x20)
+		value |= 0x50;
+	if (value & 0x80)
+		value |= 0x41;
+
+	/* convert to GP2X style */
+	value &= 0x7ff55;
+	if (value & (1 << 16))
+		value |= 1 << GP2X_BTN_VOL_UP;
+	if (value & (1 << 17))
+		value |= 1 << GP2X_BTN_VOL_DOWN;
+	if (value & (1 << 18))
+		value |= 1 << GP2X_BTN_PUSH;
+	value &= ~0x70000;
+
+	return value;
+}
+
+#ifdef FAKE_IN_GP2X
+volatile unsigned short *gp2x_memregs;
+int gp2x_dev_id = -1;
+
+static int in_gp2x_get_fake_bits(void)
+{
+	extern int current_keys;
+	return current_keys;
+}
+#endif
+
+static void in_gp2x_probe(void)
+{
+	switch (gp2x_dev_id)
+	{
+	case GP2X_DEV_GP2X:
+		in_gp2x_get_bits = in_gp2x_get_mmsp2_bits;
+		break;
+	case GP2X_DEV_WIZ:
+		gpiodev = open("/dev/GPIO", O_RDONLY);
+		if (gpiodev < 0) {
+			perror("in_gp2x: couldn't open /dev/GPIO");
+			return;
+		}
+		in_gp2x_get_bits = in_gp2x_get_wiz_bits;
+		break;
+	// we'll use evdev for Caanoo
+	default:
+#ifdef FAKE_IN_GP2X
+		in_gp2x_get_bits = in_gp2x_get_fake_bits;
+		break;
+#endif
+		return;
+	}
+
+	in_register(IN_GP2X_PREFIX "GP2X pad", -1, NULL,
+		IN_GP2X_NBUTTONS, in_gp2x_keys, 1);
+}
+
+static void in_gp2x_free(void *drv_data)
+{
+	if (gpiodev >= 0) {
+		close(gpiodev);
+		gpiodev = -1;
+	}
+}
+
+static const char * const *
+in_gp2x_get_key_names(int *count)
+{
+	*count = IN_GP2X_NBUTTONS;
+	return in_gp2x_keys;
+}
+
+/* ORs result with pressed buttons */
+static int in_gp2x_update(void *drv_data, const int *binds, int *result)
+{
+	int type_start = 0;
+	int i, t, keys;
+
+	keys = in_gp2x_get_bits();
+
+	if (keys & in_gp2x_combo_keys) {
+		result[IN_BINDTYPE_EMU] = in_combos_do(keys, binds, GP2X_BTN_PUSH,
+						in_gp2x_combo_keys, in_gp2x_combo_acts);
+		type_start = IN_BINDTYPE_PLAYER12;
+	}
+
+	for (i = 0; keys; i++, keys >>= 1) {
+		if (!(keys & 1))
+			continue;
+
+		for (t = type_start; t < IN_BINDTYPE_COUNT; t++)
+			result[t] |= binds[IN_BIND_OFFS(i, t)];
+	}
+
+	return 0;
+}
+
+int in_gp2x_update_keycode(void *data, int *is_down)
+{
+	static int old_val = 0;
+	int val, diff, i;
+
+	val = in_gp2x_get_bits();
+	diff = val ^ old_val;
+	if (diff == 0)
+		return -1;
+
+	/* take one bit only */
+	for (i = 0; i < sizeof(diff)*8; i++)
+		if (diff & (1<<i))
+			break;
+
+	old_val ^= 1 << i;
+
+	if (is_down)
+		*is_down = !!(val & (1<<i));
+	return i;
+}
+
+static const struct {
+	short key;
+	short pbtn;
+} key_pbtn_map[] =
+{
+	{ GP2X_BTN_UP,		PBTN_UP },
+	{ GP2X_BTN_DOWN,	PBTN_DOWN },
+	{ GP2X_BTN_LEFT,	PBTN_LEFT },
+	{ GP2X_BTN_RIGHT,	PBTN_RIGHT },
+	{ GP2X_BTN_B,		PBTN_MOK },
+	{ GP2X_BTN_X,		PBTN_MBACK },
+	{ GP2X_BTN_A,		PBTN_MA2 },
+	{ GP2X_BTN_Y,		PBTN_MA3 },
+	{ GP2X_BTN_L,		PBTN_L },
+	{ GP2X_BTN_R,		PBTN_R },
+	{ GP2X_BTN_SELECT,	PBTN_MENU },
+};
+
+#define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))
+
+static int in_gp2x_menu_translate(void *drv_data, int keycode)
+{
+	int i;
+	if (keycode < 0)
+	{
+		/* menu -> kc */
+		keycode = -keycode;
+		for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
+			if (key_pbtn_map[i].pbtn == keycode)
+				return key_pbtn_map[i].key;
+	}
+	else
+	{
+		for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
+			if (key_pbtn_map[i].key == keycode)
+				return key_pbtn_map[i].pbtn;
+	}
+
+	return 0;
+}
+
+#if 0 // TODO: move to pico
+static const struct {
+	short code;
+	char btype;
+	char bit;
+} in_gp2x_defbinds[] =
+{
+	/* MXYZ SACB RLDU */
+	{ BTN_UP,	IN_BINDTYPE_PLAYER12, 0 },
+	{ BTN_DOWN,	IN_BINDTYPE_PLAYER12, 1 },
+	{ BTN_LEFT,	IN_BINDTYPE_PLAYER12, 2 },
+	{ BTN_RIGHT,	IN_BINDTYPE_PLAYER12, 3 },
+	{ BTN_X,	IN_BINDTYPE_PLAYER12, 4 },	/* B */
+	{ BTN_B,	IN_BINDTYPE_PLAYER12, 5 },	/* C */
+	{ BTN_A,	IN_BINDTYPE_PLAYER12, 6 },	/* A */
+	{ BTN_START,	IN_BINDTYPE_PLAYER12, 7 },
+	{ BTN_SELECT,	IN_BINDTYPE_EMU, PEVB_MENU },
+//	{ BTN_Y,	IN_BINDTYPE_EMU, PEVB_SWITCH_RND },
+	{ BTN_L,	IN_BINDTYPE_EMU, PEVB_STATE_SAVE },
+	{ BTN_R,	IN_BINDTYPE_EMU, PEVB_STATE_LOAD },
+	{ BTN_VOL_UP,	IN_BINDTYPE_EMU, PEVB_VOL_UP },
+	{ BTN_VOL_DOWN,	IN_BINDTYPE_EMU, PEVB_VOL_DOWN },
+	{ 0, 0, 0 },
+};
+#endif
+
+static void in_gp2x_get_def_binds(int *binds)
+{
+	int i;
+
+	for (i = 0; 1; i++) {
+		if (in_gp2x_defbinds[i].bit == 0 && in_gp2x_defbinds[i].code == 0)
+			break;
+		binds[IN_BIND_OFFS(in_gp2x_defbinds[i].code, in_gp2x_defbinds[i].btype)] =
+			1 << in_gp2x_defbinds[i].bit;
+	}
+}
+
+/* remove binds of missing keys, count remaining ones */
+static int in_gp2x_clean_binds(void *drv_data, int *binds, int *def_binds)
+{
+	int i, count = 0;
+//	int eb, have_vol = 0, have_menu = 0;
+
+	for (i = 0; i < IN_GP2X_NBUTTONS; i++) {
+		int t, offs;
+		for (t = 0; t < IN_BINDTYPE_COUNT; t++) {
+			offs = IN_BIND_OFFS(i, t);
+			if (in_gp2x_keys[i] == NULL)
+				binds[offs] = def_binds[offs] = 0;
+			if (binds[offs])
+				count++;
+		}
+#if 0
+		eb = binds[IN_BIND_OFFS(i, IN_BINDTYPE_EMU)];
+		if (eb & (PEV_VOL_DOWN|PEV_VOL_UP))
+			have_vol = 1;
+		if (eb & PEV_MENU)
+			have_menu = 1;
+#endif
+	}
+
+	// TODO: move to pico
+#if 0
+	/* autobind some important keys, if they are unbound */
+	if (!have_vol && binds[GP2X_BTN_VOL_UP] == 0 && binds[GP2X_BTN_VOL_DOWN] == 0) {
+		binds[IN_BIND_OFFS(GP2X_BTN_VOL_UP, IN_BINDTYPE_EMU)]   = PEV_VOL_UP;
+		binds[IN_BIND_OFFS(GP2X_BTN_VOL_DOWN, IN_BINDTYPE_EMU)] = PEV_VOL_DOWN;
+		count += 2;
+	}
+
+	if (!have_menu) {
+		binds[IN_BIND_OFFS(GP2X_BTN_SELECT, IN_BINDTYPE_EMU)] = PEV_MENU;
+		count++;
+	}
+#endif
+
+	in_combos_find(binds, GP2X_BTN_PUSH, &in_gp2x_combo_keys, &in_gp2x_combo_acts);
+
+	return count;
+}
+
+static const in_drv_t in_gp2x_drv = {
+	.prefix         = IN_GP2X_PREFIX,
+	.probe          = in_gp2x_probe,
+	.free           = in_gp2x_free,
+	.get_key_names  = in_gp2x_get_key_names,
+	.get_def_binds  = in_gp2x_get_def_binds,
+	.clean_binds    = in_gp2x_clean_binds,
+	.update         = in_gp2x_update,
+	.update_keycode = in_gp2x_update_keycode,
+	.menu_translate = in_gp2x_menu_translate,
+};
+
+void in_gp2x_init(void)
+{
+	if (gp2x_dev_id == GP2X_DEV_WIZ)
+		in_gp2x_keys[GP2X_BTN_START] = "MENU";
+	
+	in_gp2x_combo_keys = in_gp2x_combo_acts = 0;
+
+	in_register_driver(&in_gp2x_drv);
+}
+
diff --git a/frontend/gp2x/in_gp2x.h b/frontend/gp2x/in_gp2x.h
new file mode 100644
index 0000000..6428a63
--- /dev/null
+++ b/frontend/gp2x/in_gp2x.h
@@ -0,0 +1,18 @@
+
+void in_gp2x_init(void);
+
+/* to be set somewhere in platform code */
+extern struct in_default_bind in_gp2x_defbinds[];
+
+enum  { GP2X_BTN_UP = 0,      GP2X_BTN_LEFT = 2,      GP2X_BTN_DOWN = 4,  GP2X_BTN_RIGHT = 6,
+        GP2X_BTN_START = 8,   GP2X_BTN_SELECT = 9,    GP2X_BTN_L = 10,    GP2X_BTN_R = 11,
+        GP2X_BTN_A = 12,      GP2X_BTN_B = 13,        GP2X_BTN_X = 14,    GP2X_BTN_Y = 15,
+        GP2X_BTN_VOL_UP = 23, GP2X_BTN_VOL_DOWN = 22, GP2X_BTN_PUSH = 27 };
+
+/* FIXME */
+#ifndef GP2X_DEV_GP2X
+extern int gp2x_dev_id;
+#define GP2X_DEV_GP2X 1
+#define GP2X_DEV_WIZ 2
+#define GP2X_DEV_CAANOO 3
+#endif