Atlas - SDL_sysjoystick.c
Home / ext / SDL / src / joystick / ps2 Lines: 1 | Size: 10827 bytes [Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)][FILE BEGIN]1/* 2 Simple DirectMedia Layer 3 Copyright (C) 1997-2025 Sam Lantinga <[email protected]> 4 5 This software is provided 'as-is', without any express or implied 6 warranty. In no event will the authors be held liable for any damages 7 arising from the use of this software. 8 9 Permission is granted to anyone to use this software for any purpose, 10 including commercial applications, and to alter it and redistribute it 11 freely, subject to the following restrictions: 12 13 1. The origin of this software must not be misrepresented; you must not 14 claim that you wrote the original software. If you use this software 15 in a product, an acknowledgment in the product documentation would be 16 appreciated but is not required. 17 2. Altered source versions must be plainly marked as such, and must not be 18 misrepresented as being the original software. 19 3. This notice may not be removed or altered from any source distribution. 20*/ 21#include "SDL_internal.h" 22 23#ifdef SDL_JOYSTICK_PS2 24 25// This is the PS2 implementation of the SDL joystick API 26#include <libmtap.h> 27#include <libpad.h> 28#include <ps2_joystick_driver.h> 29 30#include <stdio.h> // For the definition of NULL 31#include <stdlib.h> 32 33#include "../SDL_sysjoystick.h" 34#include "../SDL_joystick_c.h" 35 36#define PS2_MAX_PORT 2 // each ps2 has 2 ports 37#define PS2_MAX_SLOT 4 // maximum - 4 slots in one multitap 38#define MAX_CONTROLLERS (PS2_MAX_PORT * PS2_MAX_SLOT) 39#define PS2_ANALOG_STICKS 2 40#define PS2_ANALOG_AXIS 2 41#define PS2_BUTTONS 16 42#define PS2_TOTAL_AXIS (PS2_ANALOG_STICKS * PS2_ANALOG_AXIS) 43 44struct JoyInfo 45{ 46 uint8_t padBuf[256]; 47 uint16_t btns; 48 uint8_t analog_state[PS2_TOTAL_AXIS]; 49 uint8_t port; 50 uint8_t slot; 51 int8_t rumble_ready; 52 int8_t opened; 53} __attribute__((aligned(64))); 54 55static uint8_t enabled_pads = 0; 56static struct JoyInfo joyInfo[MAX_CONTROLLERS]; 57 58static inline int16_t convert_u8_to_s16(uint8_t val) 59{ 60 if (val == 0) { 61 return -0x7fff; 62 } 63 return val * 0x0101 - 0x8000; 64} 65 66static inline uint8_t rumble_status(uint8_t index) 67{ 68 char actAlign[6]; 69 int res; 70 struct JoyInfo *info = &joyInfo[index]; 71 72 if (info->rumble_ready == 0) { 73 actAlign[0] = 0; 74 actAlign[1] = 1; 75 actAlign[2] = 0xff; 76 actAlign[3] = 0xff; 77 actAlign[4] = 0xff; 78 actAlign[5] = 0xff; 79 80 res = padSetActAlign(info->port, info->slot, actAlign); 81 info->rumble_ready = res <= 0 ? -1 : 1; 82 } 83 84 return info->rumble_ready == 1; 85} 86 87// Function to scan the system for joysticks. 88static bool PS2_JoystickInit(void) 89{ 90 uint32_t port = 0; 91 uint32_t slot = 0; 92 93 if (init_joystick_driver(true) < 0) { 94 return false; 95 } 96 97 for (port = 0; port < PS2_MAX_PORT; port++) { 98 mtapPortOpen(port); 99 } 100 // it can fail - we dont care, we will check it more strictly when padPortOpen 101 102 for (slot = 0; slot < PS2_MAX_SLOT; slot++) { 103 for (port = 0; port < PS2_MAX_PORT; port++) { 104 /* 2 main controller ports acts the same with and without multitap 105 Port 0,0 -> Connector 1 - the same as Port 0 106 Port 1,0 -> Connector 2 - the same as Port 1 107 Port 0,1 -> Connector 3 108 Port 1,1 -> Connector 4 109 Port 0,2 -> Connector 5 110 Port 1,2 -> Connector 6 111 Port 0,3 -> Connector 7 112 Port 1,3 -> Connector 8 113 */ 114 115 struct JoyInfo *info = &joyInfo[enabled_pads]; 116 if (padPortOpen(port, slot, (void *)info->padBuf) > 0) { 117 info->port = (uint8_t)port; 118 info->slot = (uint8_t)slot; 119 info->opened = 1; 120 enabled_pads++; 121 SDL_PrivateJoystickAdded(enabled_pads); 122 } 123 } 124 } 125 126 return (enabled_pads > 0); 127} 128 129// Function to return the number of joystick devices plugged in right now 130static int PS2_JoystickGetCount(void) 131{ 132 return (int)enabled_pads; 133} 134 135// Function to cause any queued joystick insertions to be processed 136static void PS2_JoystickDetect(void) 137{ 138} 139 140static bool PS2_JoystickIsDevicePresent(Uint16 vendor_id, Uint16 product_id, Uint16 version, const char *name) 141{ 142 // We don't override any other drivers 143 return false; 144} 145 146// Function to get the device-dependent name of a joystick 147static const char *PS2_JoystickGetDeviceName(int index) 148{ 149 if (index >= 0 && index < enabled_pads) { 150 return "PS2 Controller"; 151 } 152 153 SDL_SetError("No joystick available with that index"); 154 return NULL; 155} 156 157// Function to get the device-dependent path of a joystick 158static const char *PS2_JoystickGetDevicePath(int index) 159{ 160 return NULL; 161} 162 163// Function to get the Steam virtual gamepad slot of a joystick 164static int PS2_JoystickGetDeviceSteamVirtualGamepadSlot(int device_index) 165{ 166 return -1; 167} 168 169// Function to get the player index of a joystick 170static int PS2_JoystickGetDevicePlayerIndex(int device_index) 171{ 172 return -1; 173} 174 175// Function to set the player index of a joystick 176static void PS2_JoystickSetDevicePlayerIndex(int device_index, int player_index) 177{ 178} 179 180// Function to return the stable GUID for a plugged in device 181static SDL_GUID PS2_JoystickGetDeviceGUID(int device_index) 182{ 183 // the GUID is just the name for now 184 const char *name = PS2_JoystickGetDeviceName(device_index); 185 return SDL_CreateJoystickGUIDForName(name); 186} 187 188// Function to get the current instance id of the joystick located at device_index 189static SDL_JoystickID PS2_JoystickGetDeviceInstanceID(int device_index) 190{ 191 return device_index + 1; 192} 193 194/* Function to open a joystick for use. 195 The joystick to open is specified by the device index. 196 This should fill the nbuttons and naxes fields of the joystick structure. 197 It returns 0, or -1 if there is an error. 198*/ 199static bool PS2_JoystickOpen(SDL_Joystick *joystick, int device_index) 200{ 201 int index = joystick->instance_id; 202 struct JoyInfo *info = &joyInfo[index]; 203 204 if (!info->opened) { 205 if (padPortOpen(info->port, info->slot, (void *)info->padBuf) > 0) { 206 info->opened = 1; 207 } else { 208 return false; 209 } 210 } 211 joystick->nbuttons = PS2_BUTTONS; 212 joystick->naxes = PS2_TOTAL_AXIS; 213 joystick->nhats = 0; 214 215 SDL_SetBooleanProperty(SDL_GetJoystickProperties(joystick), SDL_PROP_JOYSTICK_CAP_RUMBLE_BOOLEAN, true); 216 217 return true; 218} 219 220// Rumble functionality 221static bool PS2_JoystickRumble(SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble) 222{ 223 char actAlign[6]; 224 int res; 225 int index = joystick->instance_id; 226 struct JoyInfo *info = &joyInfo[index]; 227 228 if (!rumble_status(index)) { 229 return false; 230 } 231 232 // Initial value 233 actAlign[0] = low_frequency_rumble >> 8; // Enable small engine 234 actAlign[1] = high_frequency_rumble >> 8; // Enable big engine 235 actAlign[2] = 0xff; 236 actAlign[3] = 0xff; 237 actAlign[4] = 0xff; 238 actAlign[5] = 0xff; 239 240 res = padSetActDirect(info->port, info->slot, actAlign); 241 return (res == 1); 242} 243 244// Rumble functionality 245static bool PS2_JoystickRumbleTriggers(SDL_Joystick *joystick, Uint16 left, Uint16 right) 246{ 247 return SDL_Unsupported(); 248} 249 250// LED functionality 251static bool PS2_JoystickSetLED(SDL_Joystick *joystick, Uint8 red, Uint8 green, Uint8 blue) 252{ 253 return SDL_Unsupported(); 254} 255 256// General effects 257static bool PS2_JoystickSendEffect(SDL_Joystick *joystick, const void *data, int size) 258{ 259 return SDL_Unsupported(); 260} 261 262// Sensor functionality 263static bool PS2_JoystickSetSensorsEnabled(SDL_Joystick *joystick, bool enabled) 264{ 265 return SDL_Unsupported(); 266} 267 268/* Function to update the state of a joystick - called as a device poll. 269 * This function shouldn't update the joystick structure directly, 270 * but instead should call SDL_PrivateJoystick*() to deliver events 271 * and update joystick device state. 272 */ 273static void PS2_JoystickUpdate(SDL_Joystick *joystick) 274{ 275 uint8_t i; 276 uint8_t previous_axis, current_axis; 277 uint16_t mask, previous, current; 278 struct padButtonStatus buttons; 279 uint8_t all_axis[PS2_TOTAL_AXIS]; 280 int index = joystick->instance_id; 281 struct JoyInfo *info = &joyInfo[index]; 282 int state = padGetState(info->port, info->slot); 283 Uint64 timestamp = SDL_GetTicksNS(); 284 285 if (state != PAD_STATE_DISCONN && state != PAD_STATE_EXECCMD && state != PAD_STATE_ERROR) { 286 int ret = padRead(info->port, info->slot, &buttons); // port, slot, buttons 287 if (ret != 0) { 288 // Buttons 289 int32_t pressed_buttons = 0xffff ^ buttons.btns; 290 ; 291 if (info->btns != pressed_buttons) { 292 for (i = 0; i < PS2_BUTTONS; i++) { 293 mask = (1 << i); 294 previous = info->btns & mask; 295 current = pressed_buttons & mask; 296 if (previous != current) { 297 SDL_SendJoystickButton(timestamp, joystick, i, (current != 0)); 298 } 299 } 300 } 301 info->btns = pressed_buttons; 302 303 // Analog 304 all_axis[0] = buttons.ljoy_h; 305 all_axis[1] = buttons.ljoy_v; 306 all_axis[2] = buttons.rjoy_h; 307 all_axis[3] = buttons.rjoy_v; 308 309 for (i = 0; i < PS2_TOTAL_AXIS; i++) { 310 previous_axis = info->analog_state[i]; 311 current_axis = all_axis[i]; 312 if (previous_axis != current_axis) { 313 SDL_SendJoystickAxis(timestamp, joystick, i, convert_u8_to_s16(current_axis)); 314 } 315 316 info->analog_state[i] = current_axis; 317 } 318 } 319 } 320} 321 322// Function to close a joystick after use 323static void PS2_JoystickClose(SDL_Joystick *joystick) 324{ 325 int index = joystick->instance_id; 326 struct JoyInfo *info = &joyInfo[index]; 327 padPortClose(info->port, info->slot); 328 info->opened = 0; 329} 330 331// Function to perform any system-specific joystick related cleanup 332static void PS2_JoystickQuit(void) 333{ 334 deinit_joystick_driver(true); 335} 336 337static bool PS2_GetGamepadMapping(int device_index, SDL_GamepadMapping *out) 338{ 339 return false; 340} 341 342SDL_JoystickDriver SDL_PS2_JoystickDriver = { 343 PS2_JoystickInit, 344 PS2_JoystickGetCount, 345 PS2_JoystickDetect, 346 PS2_JoystickIsDevicePresent, 347 PS2_JoystickGetDeviceName, 348 PS2_JoystickGetDevicePath, 349 PS2_JoystickGetDeviceSteamVirtualGamepadSlot, 350 PS2_JoystickGetDevicePlayerIndex, 351 PS2_JoystickSetDevicePlayerIndex, 352 PS2_JoystickGetDeviceGUID, 353 PS2_JoystickGetDeviceInstanceID, 354 PS2_JoystickOpen, 355 PS2_JoystickRumble, 356 PS2_JoystickRumbleTriggers, 357 PS2_JoystickSetLED, 358 PS2_JoystickSendEffect, 359 PS2_JoystickSetSensorsEnabled, 360 PS2_JoystickUpdate, 361 PS2_JoystickClose, 362 PS2_JoystickQuit, 363 PS2_GetGamepadMapping, 364}; 365 366#endif // SDL_JOYSTICK_PS2 367[FILE END](C) 2025 0x4248 (C) 2025 4248 Media and 4248 Systems, All part of 0x4248 See LICENCE files for more information. Not all files are by 0x4248 always check Licencing.