1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (c) 2013 Google, Inc 4 */ 5 6 #include <errno.h> 7 #include <linux/input.h> 8 #include <SDL/SDL.h> 9 #include <sound.h> 10 #include <asm/state.h> 11 12 static struct sdl_info { 13 SDL_Surface *screen; 14 int width; 15 int height; 16 int depth; 17 int pitch; 18 uint frequency; 19 uint audio_pos; 20 uint audio_size; 21 uint8_t *audio_data; 22 bool audio_active; 23 bool inited; 24 } sdl; 25 26 static void sandbox_sdl_poll_events(void) 27 { 28 /* 29 * We don't want to include common.h in this file since it uses 30 * system headers. So add a declation here. 31 */ 32 extern void reset_cpu(unsigned long addr); 33 SDL_Event event; 34 35 while (SDL_PollEvent(&event)) { 36 switch (event.type) { 37 case SDL_QUIT: 38 puts("LCD window closed - quitting\n"); 39 reset_cpu(1); 40 break; 41 } 42 } 43 } 44 45 static int sandbox_sdl_ensure_init(void) 46 { 47 if (!sdl.inited) { 48 if (SDL_Init(0) < 0) { 49 printf("Unable to initialize SDL: %s\n", 50 SDL_GetError()); 51 return -EIO; 52 } 53 54 atexit(SDL_Quit); 55 56 sdl.inited = true; 57 } 58 return 0; 59 } 60 61 int sandbox_sdl_init_display(int width, int height, int log2_bpp) 62 { 63 struct sandbox_state *state = state_get_current(); 64 int err; 65 66 if (!width || !state->show_lcd) 67 return 0; 68 err = sandbox_sdl_ensure_init(); 69 if (err) 70 return err; 71 if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) { 72 printf("Unable to initialize SDL LCD: %s\n", SDL_GetError()); 73 return -EPERM; 74 } 75 SDL_WM_SetCaption("U-Boot", "U-Boot"); 76 77 sdl.width = width; 78 sdl.height = height; 79 sdl.depth = 1 << log2_bpp; 80 sdl.pitch = sdl.width * sdl.depth / 8; 81 sdl.screen = SDL_SetVideoMode(width, height, 0, 0); 82 sandbox_sdl_poll_events(); 83 84 return 0; 85 } 86 87 int sandbox_sdl_sync(void *lcd_base) 88 { 89 SDL_Surface *frame; 90 91 frame = SDL_CreateRGBSurfaceFrom(lcd_base, sdl.width, sdl.height, 92 sdl.depth, sdl.pitch, 93 0x1f << 11, 0x3f << 5, 0x1f << 0, 0); 94 SDL_BlitSurface(frame, NULL, sdl.screen, NULL); 95 SDL_FreeSurface(frame); 96 SDL_UpdateRect(sdl.screen, 0, 0, 0, 0); 97 sandbox_sdl_poll_events(); 98 99 return 0; 100 } 101 102 #define NONE (-1) 103 #define NUM_SDL_CODES (SDLK_UNDO + 1) 104 105 static int16_t sdl_to_keycode[NUM_SDL_CODES] = { 106 /* 0 */ 107 NONE, NONE, NONE, NONE, NONE, 108 NONE, NONE, NONE, KEY_BACKSPACE, KEY_TAB, 109 NONE, NONE, NONE, KEY_ENTER, NONE, 110 NONE, NONE, NONE, NONE, KEY_POWER, /* use PAUSE as POWER */ 111 112 /* 20 */ 113 NONE, NONE, NONE, NONE, NONE, 114 NONE, NONE, KEY_ESC, NONE, NONE, 115 NONE, NONE, KEY_SPACE, NONE, NONE, 116 NONE, NONE, NONE, NONE, NONE, 117 118 /* 40 */ 119 NONE, NONE, NONE, NONE, KEY_COMMA, 120 KEY_MINUS, KEY_DOT, KEY_SLASH, KEY_0, KEY_1, 121 KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, 122 KEY_7, KEY_8, KEY_9, NONE, KEY_SEMICOLON, 123 124 /* 60 */ 125 NONE, KEY_EQUAL, NONE, NONE, NONE, 126 NONE, NONE, NONE, NONE, NONE, 127 NONE, NONE, NONE, NONE, NONE, 128 NONE, NONE, NONE, NONE, NONE, 129 130 /* 80 */ 131 NONE, NONE, NONE, NONE, NONE, 132 NONE, NONE, NONE, NONE, NONE, 133 NONE, NONE, KEY_BACKSLASH, NONE, NONE, 134 NONE, KEY_GRAVE, KEY_A, KEY_B, KEY_C, 135 136 /* 100 */ 137 KEY_D, KEY_E, KEY_F, KEY_G, KEY_H, 138 KEY_I, KEY_J, KEY_K, KEY_L, KEY_M, 139 KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R, 140 KEY_S, KEY_T, KEY_U, KEY_V, KEY_W, 141 142 /* 120 */ 143 KEY_X, KEY_Y, KEY_Z, NONE, NONE, 144 NONE, NONE, KEY_DELETE, NONE, NONE, 145 NONE, NONE, NONE, NONE, NONE, 146 NONE, NONE, NONE, NONE, NONE, 147 148 /* 140 */ 149 NONE, NONE, NONE, NONE, NONE, 150 NONE, NONE, NONE, NONE, NONE, 151 NONE, NONE, NONE, NONE, NONE, 152 NONE, NONE, NONE, NONE, NONE, 153 154 /* 160 */ 155 NONE, NONE, NONE, NONE, NONE, 156 NONE, NONE, NONE, NONE, NONE, 157 NONE, NONE, NONE, NONE, NONE, 158 NONE, NONE, NONE, NONE, NONE, 159 160 /* 180 */ 161 NONE, NONE, NONE, NONE, NONE, 162 NONE, NONE, NONE, NONE, NONE, 163 NONE, NONE, NONE, NONE, NONE, 164 NONE, NONE, NONE, NONE, NONE, 165 166 /* 200 */ 167 NONE, NONE, NONE, NONE, NONE, 168 NONE, NONE, NONE, NONE, NONE, 169 NONE, NONE, NONE, NONE, NONE, 170 NONE, NONE, NONE, NONE, NONE, 171 172 /* 220 */ 173 NONE, NONE, NONE, NONE, NONE, 174 NONE, NONE, NONE, NONE, NONE, 175 NONE, NONE, NONE, NONE, NONE, 176 NONE, NONE, NONE, NONE, NONE, 177 178 /* 240 */ 179 NONE, NONE, NONE, NONE, NONE, 180 NONE, NONE, NONE, NONE, NONE, 181 NONE, NONE, NONE, NONE, NONE, 182 NONE, KEY_KP0, KEY_KP1, KEY_KP2, KEY_KP3, 183 184 /* 260 */ 185 KEY_KP4, KEY_KP5, KEY_KP6, KEY_KP7, KEY_KP8, 186 KEY_KP9, KEY_KPDOT, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS, 187 KEY_KPPLUS, KEY_KPENTER, KEY_KPEQUAL, KEY_UP, KEY_DOWN, 188 KEY_RIGHT, KEY_LEFT, KEY_INSERT, KEY_HOME, KEY_END, 189 190 /* 280 */ 191 KEY_PAGEUP, KEY_PAGEDOWN, KEY_F1, KEY_F2, KEY_F3, 192 KEY_F4, KEY_F5, KEY_F6, KEY_F7, KEY_F8, 193 KEY_F9, KEY_F10, KEY_F11, KEY_F12, NONE, 194 NONE, NONE, NONE, NONE, NONE, 195 196 /* 300 */ 197 KEY_NUMLOCK, KEY_CAPSLOCK, KEY_SCROLLLOCK, KEY_RIGHTSHIFT, 198 KEY_LEFTSHIFT, 199 KEY_RIGHTCTRL, KEY_LEFTCTRL, KEY_RIGHTALT, KEY_LEFTALT, KEY_RIGHTMETA, 200 KEY_LEFTMETA, NONE, KEY_FN, NONE, KEY_COMPOSE, 201 NONE, KEY_PRINT, KEY_SYSRQ, KEY_PAUSE, NONE, 202 203 /* 320 */ 204 NONE, NONE, NONE, 205 }; 206 207 int sandbox_sdl_scan_keys(int key[], int max_keys) 208 { 209 Uint8 *keystate; 210 int i, count; 211 212 sandbox_sdl_poll_events(); 213 keystate = SDL_GetKeyState(NULL); 214 for (i = count = 0; i < NUM_SDL_CODES; i++) { 215 if (count >= max_keys) 216 break; 217 else if (keystate[i]) 218 key[count++] = sdl_to_keycode[i]; 219 } 220 221 return count; 222 } 223 224 int sandbox_sdl_key_pressed(int keycode) 225 { 226 int key[8]; /* allow up to 8 keys to be pressed at once */ 227 int count; 228 int i; 229 230 count = sandbox_sdl_scan_keys(key, sizeof(key) / sizeof(key[0])); 231 for (i = 0; i < count; i++) { 232 if (key[i] == keycode) 233 return 0; 234 } 235 236 return -ENOENT; 237 } 238 239 void sandbox_sdl_fill_audio(void *udata, Uint8 *stream, int len) 240 { 241 int avail; 242 243 avail = sdl.audio_size - sdl.audio_pos; 244 if (avail < len) 245 len = avail; 246 247 SDL_MixAudio(stream, sdl.audio_data + sdl.audio_pos, len, 248 SDL_MIX_MAXVOLUME); 249 sdl.audio_pos += len; 250 251 /* Loop if we are at the end */ 252 if (sdl.audio_pos == sdl.audio_size) 253 sdl.audio_pos = 0; 254 } 255 256 int sandbox_sdl_sound_init(void) 257 { 258 SDL_AudioSpec wanted; 259 260 if (sandbox_sdl_ensure_init()) 261 return -1; 262 263 if (sdl.audio_active) 264 return 0; 265 266 /* 267 * At present all sandbox sounds crash. This is probably due to 268 * symbol name conflicts with U-Boot. We can remove the malloc() 269 * probles with: 270 * 271 * #define USE_DL_PREFIX 272 * 273 * and get this: 274 * 275 * Assertion 'e->pollfd->fd == e->fd' failed at pulse/mainloop.c:676, 276 * function dispatch_pollfds(). Aborting. 277 * 278 * The right solution is probably to make U-Boot's names private or 279 * link os.c and sdl.c against their libraries before liking with 280 * U-Boot. TBD. For now sound is disabled. 281 */ 282 printf("(Warning: sandbox sound disabled)\n"); 283 return 0; 284 285 /* Set the audio format */ 286 wanted.freq = 22050; 287 wanted.format = AUDIO_S16; 288 wanted.channels = 1; /* 1 = mono, 2 = stereo */ 289 wanted.samples = 1024; /* Good low-latency value for callback */ 290 wanted.callback = sandbox_sdl_fill_audio; 291 wanted.userdata = NULL; 292 293 sdl.audio_size = sizeof(uint16_t) * wanted.freq; 294 sdl.audio_data = malloc(sdl.audio_size); 295 if (!sdl.audio_data) { 296 printf("%s: Out of memory\n", __func__); 297 return -1; 298 } 299 sdl.audio_pos = 0; 300 301 if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) { 302 printf("Unable to initialize SDL audio: %s\n", SDL_GetError()); 303 goto err; 304 } 305 306 /* Open the audio device, forcing the desired format */ 307 if (SDL_OpenAudio(&wanted, NULL) < 0) { 308 printf("Couldn't open audio: %s\n", SDL_GetError()); 309 goto err; 310 } 311 sdl.audio_active = true; 312 313 return 0; 314 315 err: 316 free(sdl.audio_data); 317 return -1; 318 } 319 320 int sandbox_sdl_sound_start(uint frequency) 321 { 322 if (!sdl.audio_active) 323 return -1; 324 sdl.frequency = frequency; 325 sound_create_square_wave((unsigned short *)sdl.audio_data, 326 sdl.audio_size, frequency); 327 sdl.audio_pos = 0; 328 SDL_PauseAudio(0); 329 330 return 0; 331 } 332 333 int sandbox_sdl_sound_stop(void) 334 { 335 if (!sdl.audio_active) 336 return -1; 337 SDL_PauseAudio(1); 338 339 return 0; 340 } 341