flycast/core/linux-dist/evdev.cpp

#include <unistd.h>
#include <fcntl.h>
#include <linux/input.h>
#include "linux-dist/evdev.h"
#include "linux-dist/main.h"

#if defined(USE_EVDEV)

	int input_evdev_init(Controller* controller, const char* device)
	{
		char name[256] = "Unknown";

		printf("evdev: Trying to open device at '%s'\n", device);

		int fd = open(device, O_RDONLY);

		if (fd >= 0)
		{
			fcntl(fd, F_SETFL, O_NONBLOCK);
			if(ioctl(fd, EVIOCGNAME(sizeof(name)), name) < 0)
			{
				perror("evdev: ioctl");
				return -2;
			}
			else
			{
				printf("evdev: Found '%s' at '%s'\n", name, device);

				controller->fd = fd;

				#if defined(TARGET_PANDORA)
					*controller.mapping = &controller_mapping_pandora;
				#elif defined(TARGET_GCW0)
					*controller.mapping = &controller_mapping_gcwz;
				#else
					if (strcmp(name, "Microsoft X-Box 360 pad") == 0 ||
						strcmp(name, "Xbox 360 Wireless Receiver") == 0 ||
						strcmp(name, "Xbox 360 Wireless Receiver (XBOX)") == 0)
					{
						controller->mapping = &controller_mapping_xpad;
					}
					else if (strstr(name, "Xbox Gamepad (userspace driver)") != NULL)
					{
						controller->mapping = &controller_mapping_xboxdrv;
					}
					else if (strstr(name, "keyboard") != NULL ||
									 strstr(name, "Keyboard") != NULL)
					{
						controller->mapping = &controller_mapping_keyboard;
					}
					else
					{
						controller->mapping = &controller_mapping_generic;
					}
				#endif
				printf("evdev: Using '%s' mapping\n", controller->mapping->name);

				return 0;
			}
		}
		else
		{
			perror("evdev: open");
			return -1;
		}
	}

	bool input_evdev_handle(Controller* controller, u32 port)
	{
		#define SET_FLAG(field, mask, expr) field =((expr) ? (field & ~mask) : (field | mask))
		if (controller->fd < 0 || controller->mapping == NULL)
		{
			return false;
		}

		input_event ie;

		while(read(controller->fd, &ie, sizeof(ie)) == sizeof(ie))
		{
			if(ie.type != EV_SYN && ie.type != EV_MSC)
			{
				printf("type %i key %i state %i\n", ie.type, ie.code, ie.value);
			}
			switch(ie.type)
			{
				case EV_KEY:
					if (ie.code == controller->mapping->Btn_A) {
						SET_FLAG(kcode[port], DC_BTN_A, ie.value);
					} else if (ie.code == controller->mapping->Btn_B) {
						SET_FLAG(kcode[port], DC_BTN_B, ie.value);
					} else if (ie.code == controller->mapping->Btn_C) {
						SET_FLAG(kcode[port], DC_BTN_C, ie.value);
					} else if (ie.code == controller->mapping->Btn_D) {
						SET_FLAG(kcode[port], DC_BTN_D, ie.value);
					} else if (ie.code == controller->mapping->Btn_X) {
						SET_FLAG(kcode[port], DC_BTN_X, ie.value);
					} else if (ie.code == controller->mapping->Btn_Y) {
						SET_FLAG(kcode[port], DC_BTN_Y, ie.value);
					} else if (ie.code == controller->mapping->Btn_Z) {
						SET_FLAG(kcode[port], DC_BTN_Z, ie.value);
					} else if (ie.code == controller->mapping->Btn_Start) {
						SET_FLAG(kcode[port], DC_BTN_START, ie.value);
					} else if (ie.code == controller->mapping->Btn_Escape) {
						die("death by escape key");
					} else if (ie.code == controller->mapping->Btn_DPad_Left) {
						SET_FLAG(kcode[port], DC_DPAD_LEFT, ie.value);
					} else if (ie.code == controller->mapping->Btn_DPad_Right) {
						SET_FLAG(kcode[port], DC_DPAD_RIGHT, ie.value);
					} else if (ie.code == controller->mapping->Btn_DPad_Up) {
						SET_FLAG(kcode[port], DC_DPAD_UP, ie.value);
					} else if (ie.code == controller->mapping->Btn_DPad_Down) {
						SET_FLAG(kcode[port], DC_DPAD_DOWN, ie.value);
					} else if (ie.code == controller->mapping->Btn_DPad2_Left) {
						SET_FLAG(kcode[port], DC_DPAD2_LEFT, ie.value);
					} else if (ie.code == controller->mapping->Btn_DPad2_Right) {
						SET_FLAG(kcode[port], DC_DPAD2_RIGHT, ie.value);
					} else if (ie.code == controller->mapping->Btn_DPad2_Up) {
						SET_FLAG(kcode[port], DC_DPAD2_UP, ie.value);
					} else if (ie.code == controller->mapping->Btn_DPad2_Down) {
						SET_FLAG(kcode[port], DC_DPAD2_DOWN, ie.value);
					} else if (ie.code == controller->mapping->Btn_Trigger_Left) {
						lt[port] = (ie.value ? 255 : 0);
					} else if (ie.code == controller->mapping->Btn_Trigger_Right) {
						rt[port] = (ie.value ? 255 : 0);
					}
					break;
				case EV_ABS:
					if (ie.code == controller->mapping->Axis_DPad_X)
					{
						switch(ie.value)
						{
							case -1:
								SET_FLAG(kcode[port], DC_DPAD_LEFT,  1);
								SET_FLAG(kcode[port], DC_DPAD_RIGHT, 0);
								break;
							case 0:
								SET_FLAG(kcode[port], DC_DPAD_LEFT,  0);
								SET_FLAG(kcode[port], DC_DPAD_RIGHT, 0);
								break;
							case 1:
								SET_FLAG(kcode[port], DC_DPAD_LEFT,  0);
								SET_FLAG(kcode[port], DC_DPAD_RIGHT, 1);
								break;
						}
					}
					else if (ie.code == controller->mapping->Axis_DPad_Y)
					{
						switch(ie.value)
						{
							case -1:
								SET_FLAG(kcode[port], DC_DPAD_UP,   1);
								SET_FLAG(kcode[port], DC_DPAD_DOWN, 0);
								break;
							case 0:
								SET_FLAG(kcode[port], DC_DPAD_UP,  0);
								SET_FLAG(kcode[port], DC_DPAD_DOWN, 0);
								break;
							case 1:
								SET_FLAG(kcode[port], DC_DPAD_UP,  0);
								SET_FLAG(kcode[port], DC_DPAD_DOWN, 1);
								break;
						}
					}
					else if (ie.code == controller->mapping->Axis_DPad2_X)
					{
						switch(ie.value)
						{
							case -1:
								SET_FLAG(kcode[port], DC_DPAD2_LEFT,  1);
								SET_FLAG(kcode[port], DC_DPAD2_RIGHT, 0);
								break;
							case 0:
								SET_FLAG(kcode[port], DC_DPAD2_LEFT,  0);
								SET_FLAG(kcode[port], DC_DPAD2_RIGHT, 0);
								break;
							case 1:
								SET_FLAG(kcode[port], DC_DPAD2_LEFT,  0);
								SET_FLAG(kcode[port], DC_DPAD2_RIGHT, 1);
								break;
						}
					}
					else if (ie.code == controller->mapping->Axis_DPad2_X)
					{
						switch(ie.value)
						{
							case -1:
								SET_FLAG(kcode[port], DC_DPAD2_UP,   1);
								SET_FLAG(kcode[port], DC_DPAD2_DOWN, 0);
								break;
							case 0:
								SET_FLAG(kcode[port], DC_DPAD2_UP,  0);
								SET_FLAG(kcode[port], DC_DPAD2_DOWN, 0);
								break;
							case 1:
								SET_FLAG(kcode[port], DC_DPAD2_UP,  0);
								SET_FLAG(kcode[port], DC_DPAD2_DOWN, 1);
								break;
						}
					}
					else if (ie.code == controller->mapping->Axis_Analog_X)
					{
						printf("%d", ie.value);
						joyx[port] = (s8)(ie.value/256);
					}
					else if (ie.code == controller->mapping->Axis_Analog_Y)
					{
						joyy[port] = (s8)(ie.value/256);
					}
					else if (ie.code == controller->mapping->Axis_Trigger_Left)
					{
						lt[port] = (s8)ie.value;
					}
					else if (ie.code == controller->mapping->Axis_Trigger_Right)
					{
						rt[port] = (s8)ie.value;
					}
					break;
			}
		}
	}
#endif