diff --git a/Makefile b/Makefile index 69a20e48d6..6883c37850 100644 --- a/Makefile +++ b/Makefile @@ -121,6 +121,11 @@ $(OBJDIR)/tools/linuxraw_joypad.o: input/linuxraw_joypad.c @$(if $(Q), $(shell echo echo CC $<),) $(Q)$(CC) $(CFLAGS) $(DEFINES) -MMD -DIS_JOYCONFIG -c -o $@ $< +$(OBJDIR)/tools/parport_joypad.o: input/parport_joypad.c + @mkdir -p $(dir $@) + @$(if $(Q), $(shell echo echo CC $<),) + $(Q)$(CC) $(CFLAGS) $(DEFINES) -MMD -DIS_JOYCONFIG -c -o $@ $< + $(OBJDIR)/tools/udev_joypad.o: input/udev_joypad.c @mkdir -p $(dir $@) @$(if $(Q), $(shell echo echo CC $<),) diff --git a/Makefile.common b/Makefile.common index 40f6e197ab..bbea4f8b3a 100644 --- a/Makefile.common +++ b/Makefile.common @@ -59,8 +59,8 @@ endif ifneq ($(findstring Linux,$(OS)),) LIBS += -lrt JOYCONFIG_LIBS += -lrt - OBJ += input/linuxraw_input.o input/linuxraw_joypad.o - JOYCONFIG_OBJ += tools/linuxraw_joypad.o + OBJ += input/linuxraw_input.o input/linuxraw_joypad.o input/parport_joypad.o + JOYCONFIG_OBJ += tools/linuxraw_joypad.o tools/parport_joypad.o endif ifeq ($(findstring Haiku,$(OS)),) diff --git a/input/input_common.c b/input/input_common.c index ba099ba8fb..6ccb262395 100644 --- a/input/input_common.c +++ b/input/input_common.c @@ -75,6 +75,7 @@ rarch_joypad_driver_t *joypad_drivers[] = { #endif #if defined(__linux) && !defined(ANDROID) &linuxraw_joypad, + &parport_joypad, #endif #ifdef ANDROID &android_joypad, diff --git a/input/input_common.h b/input/input_common.h index d73819473b..25d0131515 100644 --- a/input/input_common.h +++ b/input/input_common.h @@ -127,6 +127,7 @@ const char *input_joypad_name(const rarch_joypad_driver_t *driver, extern rarch_joypad_driver_t dinput_joypad; extern rarch_joypad_driver_t linuxraw_joypad; +extern rarch_joypad_driver_t parport_joypad; extern rarch_joypad_driver_t udev_joypad; extern rarch_joypad_driver_t winxinput_joypad; extern rarch_joypad_driver_t sdl_joypad; diff --git a/input/parport_joypad.c b/input/parport_joypad.c new file mode 100644 index 0000000000..130fb62aa0 --- /dev/null +++ b/input/parport_joypad.c @@ -0,0 +1,244 @@ +/* RetroArch - A frontend for libretro. + * Copyright (C) 2010-2014 - Hans-Kristian Arntzen + * Copyright (C) 2014 - Mike Robinson + * + * RetroArch is free software: you can redistribute it and/or modify it under the terms + * of the GNU General Public License as published by the Free Software Found- + * ation, either version 3 of the License, or (at your option) any later version. + * + * RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; + * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along with RetroArch. + * If not, see . + */ + +#include "input_common.h" +#include "../general.h" +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Linux parport driver does not support reading the control register + Other platforms may support up to 17 buttons */ +#define NUM_BUTTONS 13 + +struct parport_joypad +{ + int fd; + bool buttons[NUM_BUTTONS]; + + char *ident; +}; + +static struct parport_joypad g_pads[MAX_PLAYERS]; + +static void poll_pad(struct parport_joypad *pad) +{ + /* RetroArch uses an extended version of the Linux + * Multisystem 2-button joystick protocol for parallel port + * joypads: + * + * | Function | Pin | Register | Bit | Active | + * |-------------|-----|----------|-----|--------| + * | Up | 2 | Data | 0 | Low | + * | Down | 3 | Data | 1 | Low | + * | Left | 4 | Data | 2 | Low | + * | Right | 5 | Data | 3 | Low | + * | A | 6 | Data | 4 | Low | + * | B | 7 | Data | 5 | Low | + * | Start | 8 | Data | 6 | Low | + * | Select | 9 | Data | 7 | Low | + * | Menu toggle | 10 | Status | 6 | Low | + * | X | 11 | Status | 7 | Low* | + * | Y | 12 | Status | 5 | Low | + * | L1 | 13 | Status | 4 | Low | + * | R1 | 15 | Status | 3 | Low | + * + * (*) Pin is hardware inverted, but RetroArch inverts it + * back again so the same pullup scheme may be used for + * all pins. + * + * RetroArch does not perform debouncing, and so long as + * the button settling time is less than the frame time + * no bouncing will be observed. This replicates the latching + * behavior common in old games consoles. For optimum latency + * and jitter a high performance debouncing routine should be + * implemented in the controller hardware. + */ + + int i; + char data; + char status; + + ioctl(pad->fd, PPRDATA, &data); + ioctl(pad->fd, PPRSTATUS, &status); + + for (i = 0; i < 8; i++) + { + pad->buttons[i] = !(data & UINT8_C(1 << i)); + } + for (i = 3; i < 8; i++) + { + pad->buttons[i + 5] = !(status & UINT8_C(1 << i)); + } + pad->buttons[12] = pad->buttons[12] ? false : true; +} + +static bool parport_joypad_init_pad(const char *path, struct parport_joypad *pad) +{ + int datadir = 1; /* read */ + char data; + bool irq_disable = false; + int mode = IEEE1284_MODE_BYTE; + + if (pad->fd >= 0) + return false; + + if (access(path, R_OK | W_OK) < 0) + return false; + + pad->fd = open(path, O_RDWR); + + *pad->ident = '\0'; + if (pad->fd >= 0) + { + RARCH_LOG("[Joypad]: Found parallel port: %s\n", path); + + /* Parport driver does not log failures with RARCH_ERR because they could be + * a normal result of connected non-joypad devices. */ + if (ioctl(pad->fd, PPCLAIM) < 0) + { + RARCH_WARN("[Joypad]: Failed to claim %s\n", path); + goto error; + } + if (ioctl(pad->fd, PPSETMODE, &mode) < 0) + { + RARCH_WARN("[Joypad]: Failed to set byte mode on %s\n", path); + goto error; + } + if (ioctl(pad->fd, PPDATADIR, &datadir) < 0) + { + RARCH_WARN("[Joypad]: Failed to set data direction to input on %s\n", path); + goto error; + } + if (ioctl(pad->fd, PPRCONTROL, &data) == 0) + { + data &= 0xEF; /* Clear bit 4 to disable interrupts */ + if (ioctl(pad->fd, PPWCONTROL, &data) == 0) + irq_disable = true; + } + /* Failure to disable interrupts only slightly increases CPU use, not an error */ + if (!irq_disable) + RARCH_WARN("[Joypad]: Failed to disable interrupts on %s\n", path); + + strlcpy(pad->ident, "Parallel port device", sizeof(g_settings.input.device_names[0])); + return true; +error: + close(pad->fd); + pad->fd = 0; + return false; + } + + RARCH_WARN("[Joypad]: Failed to open parallel port %s (error: %s).\n", path, strerror(errno)); + return false; +} + +static void parport_joypad_poll(void) +{ + int i; + + for (i = 0; i < MAX_PLAYERS; i++) + { + if (g_pads[i].fd >= 0) + { + poll_pad(&g_pads[i]); + } + } +} + +static bool parport_joypad_init(void) +{ + unsigned i; + + for (i = 0; i < MAX_PLAYERS; i++) + { + struct parport_joypad *pad = &g_pads[i]; + pad->fd = -1; + pad->ident = g_settings.input.device_names[i]; + + char path[PATH_MAX]; + snprintf(path, sizeof(path), "/dev/parport%u", i); + + if (parport_joypad_init_pad(path, pad)) + { + input_config_autoconfigure_joypad(i, pad->ident, 0, 0, "parport"); + poll_pad(pad); + } + else + input_config_autoconfigure_joypad(i, NULL, 0, 0, NULL); + } + + return true; +} + +static void parport_joypad_destroy(void) +{ + unsigned i; + for (i = 0; i < MAX_PLAYERS; i++) + { + if (g_pads[i].fd >= 0) + { + ioctl(g_pads[i].fd, PPRELEASE); + close(g_pads[i].fd); + } + } + memset(g_pads, 0, sizeof(g_pads)); + for (i = 0; i < MAX_PLAYERS; i++) + g_pads[i].fd = -1; +} + +static bool parport_joypad_button(unsigned port, uint16_t joykey) +{ + const struct parport_joypad *pad = &g_pads[port]; + + return joykey < NUM_BUTTONS && pad->buttons[joykey]; +} + +static int16_t parport_joypad_axis(unsigned port, uint32_t joyaxis) +{ + /* Parport does not support analog sticks */ + return 0; +} + +static bool parport_joypad_query_pad(unsigned pad) +{ + return pad < MAX_PLAYERS && g_pads[pad].fd >= 0; +} + +static const char *parport_joypad_name(unsigned pad) +{ + if (pad >= MAX_PLAYERS) + return NULL; + + return *g_pads[pad].ident ? g_pads[pad].ident : NULL; +} + +rarch_joypad_driver_t parport_joypad = { + parport_joypad_init, + parport_joypad_query_pad, + parport_joypad_destroy, + parport_joypad_button, + parport_joypad_axis, + parport_joypad_poll, + NULL, + parport_joypad_name, + "parport", +};