From ce45d3f2dae90d40414d57ed32a85081c73171c9 Mon Sep 17 00:00:00 2001
From: sorgelig <pour.garbage@gmail.com>
Date: Fri, 24 Apr 2020 07:50:58 +0800
Subject: [PATCH] input: support for JammaSD to joystick translation.

---
 MiSTer.ini |  5 +++++
 cfg.cpp    |  2 ++
 cfg.h      |  2 ++
 input.cpp  | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 73 insertions(+)

diff --git a/MiSTer.ini b/MiSTer.ini
index ddad794..8b0fa0a 100644
--- a/MiSTer.ini
+++ b/MiSTer.ini
@@ -97,3 +97,8 @@ refresh_max=0
 ; 1-10 (seconds) to display controller's button map upon first time key press
 ; 0 - disable
 controller_info=6
+
+; JammaSD keys to joysticks translation
+; You have to provide correct VID and PID of your input device
+jammasd_vid=0x04D8
+jammasd_pid=0xF3AD
diff --git a/cfg.cpp b/cfg.cpp
index 9374bb2..91fb7ff 100644
--- a/cfg.cpp
+++ b/cfg.cpp
@@ -66,6 +66,8 @@ static const ini_var_t ini_vars[] =
 	{ "CONTROLLER_INFO", (void*)(&(cfg.controller_info)), UINT8, 0, 10 },
 	{ "REFRESH_MIN", (void*)(&(cfg.refresh_min)), UINT8, 0, 150 },
 	{ "REFRESH_MAX", (void*)(&(cfg.refresh_max)), UINT8, 0, 150 },
+	{ "JAMMASD_VID", (void*)(&(cfg.jammasd_vid)), UINT16, 0, 0xFFFF },
+	{ "JAMMASD_PID", (void*)(&(cfg.jammasd_pid)), UINT16, 0, 0xFFFF },
 };
 
 static const int nvars = (int)(sizeof(ini_vars) / sizeof(ini_var_t));
diff --git a/cfg.h b/cfg.h
index b98cf44..2664d4b 100644
--- a/cfg.h
+++ b/cfg.h
@@ -40,6 +40,8 @@ typedef struct {
 	uint16_t osd_timeout;
 	uint8_t gamepad_defaults;
 	uint8_t recents;
+	uint16_t jammasd_vid;
+	uint16_t jammasd_pid;
 	char bootcore[256];
 	char video_conf[1024];
 	char video_conf_pal[1024];
diff --git a/input.cpp b/input.cpp
index 6ef6b05..36b7e88 100644
--- a/input.cpp
+++ b/input.cpp
@@ -852,6 +852,7 @@ enum QUIRK
 	QUIRK_MADCATZ360,
 	QUIRK_PDSP,
 	QUIRK_PDSP_ARCADE,
+	QUIRK_JAMMASD,
 };
 
 typedef struct
@@ -2635,6 +2636,49 @@ void mergedevs()
 	}
 }
 
+// jammasd have shifted keys: when 1P start is kept pressed, it acts as a shift key,
+// outputting other key signals. Example: 1P start + 2P start = KEY_ESC
+// Shifted keys are passed as normal keyboard keys.
+static struct
+{
+	uint16_t key;
+	uint16_t player;
+	uint16_t btn;
+} jammasd2joy[] =
+{
+	{KEY_5,         1, 0x120}, // 1P coin
+	{KEY_1,         1, 0x121}, // 1P start (shift key)
+	{KEY_UP,        1, 0x122}, // 1P up
+	{KEY_DOWN,      1, 0x123}, // 1P down
+	{KEY_LEFT,      1, 0x124}, // 1P left
+	{KEY_RIGHT,     1, 0x125}, // 1P right
+	{KEY_LEFTCTRL,  1, 0x126}, // 1P 1
+	{KEY_LEFTALT,   1, 0x127}, // 1P 2
+	{KEY_SPACE,     1, 0x128}, // 1P 3
+	{KEY_LEFTSHIFT, 1, 0x129}, // 1P 4
+	{KEY_Z,         1, 0x12A}, // 1P 5
+	{KEY_X,         1, 0x12B}, // 1P 6
+	{KEY_C,         1, 0x12C}, // 1P 7
+	{KEY_V,         1, 0x12D}, // 1P 8
+	{KEY_9,         1, 0x12E}, // Test
+	{KEY_F2,        1, 0x12F}, // service
+
+	{KEY_6,         2, 0x120}, // 2P coin
+	{KEY_2,         2, 0x121}, // 2P start
+	{KEY_R,         2, 0x122}, // 2P up
+	{KEY_F,         2, 0x123}, // 2P down
+	{KEY_D,         2, 0x124}, // 2P left
+	{KEY_G,         2, 0x125}, // 2P right
+	{KEY_A,         2, 0x126}, // 2P 1
+	{KEY_S,         2, 0x127}, // 2P 2
+	{KEY_Q,         2, 0x128}, // 2P 3
+	{KEY_W,         2, 0x129}, // 2P 4
+	{KEY_I,         2, 0x12A}, // 2P 5
+	{KEY_K,         2, 0x12B}, // 2P 6
+	{KEY_J,         2, 0x12C}, // 2P 7
+	{KEY_L,         2, 0x12D}, // 2P 8
+};
+
 int input_test(int getchar)
 {
 	static char cur_leds = 0;
@@ -2805,6 +2849,12 @@ int input_test(int getchar)
 						// Includes other buttons and axes, works as a full featured gamepad.
 						if (strstr(uniq, "MiSTer-A1")) input[n].quirk = QUIRK_PDSP_ARCADE;
 
+						//JammaSD
+						if (cfg.jammasd_vid && cfg.jammasd_pid && input[n].vid == cfg.jammasd_vid && input[n].pid == cfg.jammasd_pid)
+						{
+							input[n].quirk = QUIRK_JAMMASD;
+						}
+
 						//Arduino and Teensy devices may share the same VID:PID, so additional field UNIQ is used to differentiate them
 						if ((input[n].vid == 0x2341 || (input[n].vid == 0x16C0 && (input[n].pid>>8) == 0x4)) && strlen(uniq))
 						{
@@ -3031,6 +3081,20 @@ int input_test(int getchar)
 									}
 								}
 
+								if (input[dev].quirk == QUIRK_JAMMASD && ev.type == EV_KEY)
+								{
+									input[dev].num = 0;
+									for (uint32_t i = 0; i <= sizeof(jammasd2joy) / sizeof(jammasd2joy[0]); i++)
+									{
+										if (jammasd2joy[i].key == ev.code)
+										{
+											ev.code = jammasd2joy[i].btn;
+											input[dev].num = jammasd2joy[i].player;
+											break;
+										}
+									}
+								}
+
 								//Menu combo on 8BitDo receiver in PSC mode
 								if (input[dev].vid == 0x054c && input[dev].pid == 0x0cda && ev.type == EV_KEY)
 								{