support my Hornet Gamepad, clean up

Author: revvv

README.md

@@ -21,10 +21,11 @@
 
 ### Notes
 * Original SNES Mouse is not supported. (I don't have one, but if you give me the RetrodeTest output I could add it...)
+* Latest version also supports my _Speedlink Hornet USB Gamepad_: VID=0079, PID=0011. Various manufacturers use the same IDs, but with different button layouts. 
 * I also maintain the [RetroArchWiiRetrode](https://github.com/revvv/RetroArchWiiRetrode/) fork.
 
 #### Download
-* [snes9xgx-retrode-xbox360-0.4.zip](https://github.com/revvv/snes9xgx-retrode/releases/download/0.4/snes9xgx-retrode-xbox360-0.4.zip)
+* [snes9xgx-retrode-xbox360-0.5.zip](https://github.com/revvv/snes9xgx-retrode/releases/download/0.5/snes9xgx-retrode-xbox360-0.5.zip)
 * [RetrodeTest-0.1.zip](https://github.com/revvv/snes9xgx-retrode/releases/download/0.1/RetrodeTest-0.1.zip) 
 
 ![Screenshot](snes9xgx-screenshot.png "Snes9x GX Credits screen")

source/input.cpp

@@ -38,6 +38,7 @@
 #ifdef HW_RVL
 #include "utils/retrode.h"
 #include "utils/xbox360.h"
+#include "utils/hornet.h"
 #endif
 
 #define ANALOG_SENSITIVITY 30
@@ -337,6 +338,7 @@ UpdatePads()
 	WiiDRC_ScanPads();
 	Retrode_ScanPads();
 	XBOX360_ScanPads();
+	Hornet_ScanPads();
 	WPAD_ScanPads();
 	#endif
 
@@ -539,6 +541,7 @@ static void decodepad (int chan)
 
 	jp |= Retrode_ButtonsHeld(chan);
 	jp |= XBOX360_ButtonsHeld(chan);
+	jp |= Hornet_ButtonsHeld(chan);
 #endif
 
 	/***
@@ -904,5 +907,6 @@ char* GetUSBControllerInfo()
 {
     static char info[50];
     snprintf(info, 50, "Retrode: %s, XBOX360: %s", Retrode_Status(), XBOX360_Status());
+    Hornet_Status(); // Hornet support as undocumented feature ;-)
     return info;
 }

source/snes9xgx.h

@@ -20,7 +20,7 @@
 #include "filelist.h"
 
 #define APPNAME 			"Snes9x GX"
-#define APPVERSION 			"4.4.3 Retrode/XBOX360 0.3"
+#define APPVERSION 			"4.4.3 Retrode/XBOX360 0.5"
 #define APPFOLDER 			"snes9xgx"
 #define PREF_FILE_NAME		"settings.xml"
 

source/utils/hornet.c

@@ -0,0 +1,161 @@
+#ifdef HW_RVL
+#include <gccore.h>
+
+static bool setup = false;
+static bool replugRequired = false;
+static s32 deviceId = 0;
+static u8 endpoint = 0;
+static u8 bMaxPacketSize = 0;
+static u32 jp;
+
+bool isHornetGamepad(usb_devdesc devdesc)
+{
+    return (devdesc.idVendor == 0x0079 && devdesc.idProduct == 0x0011);
+}
+
+static u8 getEndpoint(usb_devdesc devdesc)
+{
+	if (devdesc.configurations == NULL || devdesc.configurations->interfaces == NULL ||
+			devdesc.configurations->interfaces->endpoints == NULL)
+	{
+		return -1;
+	}
+	return devdesc.configurations->interfaces->endpoints->bEndpointAddress;
+}
+
+static int removal_cb(int result, void *usrdata)
+{
+    s32 fd = (s32) usrdata;
+    if (fd == deviceId)
+    {
+        deviceId = 0;
+    }
+    return 1;
+}
+
+static void open()
+{
+    if (deviceId != 0)
+    {
+        return;
+    }
+
+	usb_device_entry dev_entry[8];
+	u8 dev_count;
+	if (USB_GetDeviceList(dev_entry, 8, USB_CLASS_HID, &dev_count) < 0)
+	{
+		return;
+	}
+
+	for (int i = 0; i < dev_count; ++i)
+	{
+		s32 fd;
+		if (USB_OpenDevice(dev_entry[i].device_id, dev_entry[i].vid, dev_entry[i].pid, &fd) < 0)
+		{
+			continue;
+		}
+
+		usb_devdesc devdesc;
+		if (USB_GetDescriptors(fd, &devdesc) < 0)
+		{
+		    // You have to replug the controller!
+		    replugRequired = true;
+			USB_CloseDevice(&fd);
+			break;
+		}
+
+		if (isHornetGamepad(devdesc))
+		{
+            deviceId = fd;
+            replugRequired = false;
+            endpoint = getEndpoint(devdesc);
+            bMaxPacketSize = devdesc.bMaxPacketSize0;
+            USB_DeviceRemovalNotifyAsync(fd, &removal_cb, (void*) fd);
+            break;
+		}
+		else
+		{
+		    USB_CloseDevice(&fd);
+		}
+	}
+
+    setup = true;
+}
+
+void Hornet_ScanPads()
+{
+	if (deviceId == 0)
+	{
+		return;
+	}
+
+	uint8_t ATTRIBUTE_ALIGN(32) buf[bMaxPacketSize];
+	s32 res = USB_ReadIntrMsg(deviceId, endpoint, sizeof(buf), buf);
+	if (res < 0)
+	{
+		return;
+	}
+
+	// Button layout
+    // A=5,2F
+    // B=5,1F
+    // X=6,01
+    // Y=5,8F
+    // Select=6,10 ; Hornet button label = "9"
+    // Start=6,20  ; Hornet button label = "10"
+    // Up=4,00
+    // Right=3,FF
+    // Left=3,00
+    // Down=4,FF
+    // L=6,04
+    // R=6,08
+    // Unused=6,02 ; Hornet button label = "6"
+    // Unused=5,4F ; Hornet button label = "3"
+
+	jp = 0;
+	jp |= (buf[4] == 0x00) ? PAD_BUTTON_UP    : 0;
+	jp |= (buf[4] == 0xFF) ? PAD_BUTTON_DOWN  : 0;
+	jp |= (buf[3] == 0x00) ? PAD_BUTTON_LEFT  : 0;
+	jp |= (buf[3] == 0xFF) ? PAD_BUTTON_RIGHT : 0;
+
+	jp |= ((buf[5] & 0x2F) == 0x2F) ? PAD_BUTTON_A : 0;
+	jp |= ((buf[5] & 0x1F) == 0x1F) ? PAD_BUTTON_B : 0;
+	jp |= ((buf[6] & 0x01) == 0x01) ? PAD_BUTTON_X : 0;
+	jp |= ((buf[5] & 0x8F) == 0x8F) ? PAD_BUTTON_Y : 0;
+
+	jp |= ((buf[6] & 0x04) == 0x04) ? PAD_TRIGGER_L : 0;
+	jp |= ((buf[6] & 0x08) == 0x08) ? PAD_TRIGGER_R : 0;
+
+	jp |= ((buf[6] & 0x20) == 0x20) ? PAD_BUTTON_START : 0;
+	jp |= ((buf[6] & 0x10) == 0x10) ? PAD_TRIGGER_Z    : 0; // Hornet select button maps to Z
+
+	jp |= ((buf[6] & 0x02) == 0x02) ? PAD_BUTTON_Y : 0; // Hornet button 6 maps to Y
+	jp |= ((buf[5] & 0x4F) == 0x4F) ? PAD_BUTTON_B : 0; // Hornet button 3 maps to B
+}
+
+u32 Hornet_ButtonsHeld(int chan)
+{
+    if(!setup)
+    {
+        open();
+    }
+	if (deviceId == 0)
+	{
+		return 0;
+	}
+	if (chan != 0)
+	{
+	    return 0;
+	}
+	return jp;
+}
+
+char* Hornet_Status()
+{
+    open();
+    if (replugRequired)
+        return "please replug";
+    return deviceId ? "connected" : "not found";
+}
+
+#endif

source/utils/hornet.h

@@ -0,0 +1,18 @@
+#ifndef _HORNET_H_
+#define _HORNET_H_
+
+#include <gctypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+bool Hornet_ScanPads();
+u32 Hornet_ButtonsHeld(int chan);
+char* Hornet_Status();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif