1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2013 Google, Inc
4 */
5
6 #include <errno.h>
7 #include <unistd.h>
8 #include <stdbool.h>
9 #include <linux/input.h>
10 #include <SDL2/SDL.h>
11 #include <asm/state.h>
12
13 /**
14 * struct buf_info - a data buffer holding audio data
15 *
16 * @pos: Current position playing in audio buffer
17 * @size: Size of data in audio buffer (0=empty)
18 * @alloced: Allocated size of audio buffer (max size it can hold)
19 * @data: Audio data
20 */
21 struct buf_info {
22 uint pos;
23 uint size;
24 uint alloced;
25 uint8_t *data;
26 };
27
28 /**
29 * struct sdl_info - Information about our use of the SDL library
30 *
31 * @width: Width of simulated LCD display
32 * @height: Height of simulated LCD display
33 * @vis_width: Visible width (may be larger to allow for scaling up)
34 * @vis_height: Visible height (may be larger to allow for scaling up)
35 * @depth: Depth of the display in bits per pixel (16 or 32)
36 * @pitch: Number of bytes per line of the display
37 * @sample_rate: Current sample rate for audio
38 * @audio_active: true if audio can be used
39 * @inited: true if this module is initialised
40 * @cur_buf: Current audio buffer being used by sandbox_sdl_fill_audio (0 or 1)
41 * @buf: The two available audio buffers. SDL can be reading from one while we
42 * are setting up the next
43 * @running: true if audio is running
44 * @stopping: true if audio will stop once it runs out of data
45 * @texture: SDL texture to use for U-Boot display contents
46 * @renderer: SDL renderer to use
47 */
48 static struct sdl_info {
49 int width;
50 int height;
51 int vis_width;
52 int vis_height;
53 int depth;
54 int pitch;
55 uint sample_rate;
56 bool audio_active;
57 bool inited;
58 int cur_buf;
59 struct buf_info buf[2];
60 bool running;
61 bool stopping;
62 SDL_Texture *texture;
63 SDL_Renderer *renderer;
64 } sdl;
65
sandbox_sdl_poll_events(void)66 static void sandbox_sdl_poll_events(void)
67 {
68 /*
69 * We don't want to include common.h in this file since it uses
70 * system headers. So add a declation here.
71 */
72 extern void reset_cpu(void);
73 SDL_Event event;
74
75 while (SDL_PollEvent(&event)) {
76 switch (event.type) {
77 case SDL_QUIT:
78 puts("LCD window closed - quitting\n");
79 reset_cpu();
80 break;
81 }
82 }
83 }
84
sandbox_sdl_ensure_init(void)85 static int sandbox_sdl_ensure_init(void)
86 {
87 if (!sdl.inited) {
88 if (SDL_Init(0) < 0) {
89 printf("Unable to initialise SDL: %s\n",
90 SDL_GetError());
91 return -EIO;
92 }
93
94 atexit(SDL_Quit);
95
96 sdl.inited = true;
97 }
98 return 0;
99 }
100
sandbox_sdl_init_display(int width,int height,int log2_bpp,bool double_size)101 int sandbox_sdl_init_display(int width, int height, int log2_bpp,
102 bool double_size)
103 {
104 struct sandbox_state *state = state_get_current();
105 int err;
106
107 if (!width || !state->show_lcd)
108 return 0;
109 err = sandbox_sdl_ensure_init();
110 if (err)
111 return err;
112 if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) {
113 printf("Unable to initialise SDL LCD: %s\n", SDL_GetError());
114 return -EPERM;
115 }
116 sdl.width = width;
117 sdl.height = height;
118 if (double_size) {
119 sdl.vis_width = sdl.width * 2;
120 sdl.vis_height = sdl.height * 2;
121 } else {
122 sdl.vis_width = sdl.width;
123 sdl.vis_height = sdl.height;
124 }
125
126 sdl.depth = 1 << log2_bpp;
127 sdl.pitch = sdl.width * sdl.depth / 8;
128 SDL_Window *screen = SDL_CreateWindow("U-Boot", SDL_WINDOWPOS_UNDEFINED,
129 SDL_WINDOWPOS_UNDEFINED,
130 sdl.vis_width, sdl.vis_height,
131 SDL_WINDOW_RESIZABLE);
132 if (!screen) {
133 printf("Unable to initialise SDL screen: %s\n",
134 SDL_GetError());
135 return -EIO;
136 }
137 if (log2_bpp != 4 && log2_bpp != 5) {
138 printf("U-Boot SDL does not support depth %d\n", log2_bpp);
139 return -EINVAL;
140 }
141 sdl.renderer = SDL_CreateRenderer(screen, -1,
142 SDL_RENDERER_ACCELERATED |
143 SDL_RENDERER_PRESENTVSYNC);
144 if (!sdl.renderer) {
145 printf("Unable to initialise SDL renderer: %s\n",
146 SDL_GetError());
147 return -EIO;
148 }
149
150 sdl.texture = SDL_CreateTexture(sdl.renderer, log2_bpp == 4 ?
151 SDL_PIXELFORMAT_RGB565 :
152 SDL_PIXELFORMAT_RGB888,
153 SDL_TEXTUREACCESS_STREAMING,
154 width, height);
155 if (!sdl.texture) {
156 printf("Unable to initialise SDL texture: %s\n",
157 SDL_GetError());
158 return -EBADF;
159 }
160 sandbox_sdl_poll_events();
161
162 return 0;
163 }
164
sandbox_sdl_sync(void * lcd_base)165 int sandbox_sdl_sync(void *lcd_base)
166 {
167 SDL_UpdateTexture(sdl.texture, NULL, lcd_base, sdl.pitch);
168 SDL_RenderCopy(sdl.renderer, sdl.texture, NULL, NULL);
169 SDL_RenderPresent(sdl.renderer);
170 sandbox_sdl_poll_events();
171
172 return 0;
173 }
174
175 static const unsigned short sdl_to_keycode[SDL_NUM_SCANCODES] = {
176 [SDL_SCANCODE_ESCAPE] = KEY_ESC,
177 [SDL_SCANCODE_1] = KEY_1,
178 [SDL_SCANCODE_2] = KEY_2,
179 [SDL_SCANCODE_3] = KEY_3,
180 [SDL_SCANCODE_4] = KEY_4,
181 [SDL_SCANCODE_5] = KEY_5,
182 [SDL_SCANCODE_6] = KEY_6,
183 [SDL_SCANCODE_7] = KEY_7,
184 [SDL_SCANCODE_8] = KEY_8,
185 [SDL_SCANCODE_9] = KEY_9,
186 [SDL_SCANCODE_0] = KEY_0,
187 [SDL_SCANCODE_MINUS] = KEY_MINUS,
188 [SDL_SCANCODE_EQUALS] = KEY_EQUAL,
189 [SDL_SCANCODE_BACKSPACE] = KEY_BACKSPACE,
190 [SDL_SCANCODE_TAB] = KEY_TAB,
191 [SDL_SCANCODE_Q] = KEY_Q,
192 [SDL_SCANCODE_W] = KEY_W,
193 [SDL_SCANCODE_E] = KEY_E,
194 [SDL_SCANCODE_R] = KEY_R,
195 [SDL_SCANCODE_T] = KEY_T,
196 [SDL_SCANCODE_Y] = KEY_Y,
197 [SDL_SCANCODE_U] = KEY_U,
198 [SDL_SCANCODE_I] = KEY_I,
199 [SDL_SCANCODE_O] = KEY_O,
200 [SDL_SCANCODE_P] = KEY_P,
201 [SDL_SCANCODE_LEFTBRACKET] = KEY_LEFTBRACE,
202 [SDL_SCANCODE_RIGHTBRACKET] = KEY_RIGHTBRACE,
203 [SDL_SCANCODE_RETURN] = KEY_ENTER,
204 [SDL_SCANCODE_LCTRL] = KEY_LEFTCTRL,
205 [SDL_SCANCODE_A] = KEY_A,
206 [SDL_SCANCODE_S] = KEY_S,
207 [SDL_SCANCODE_D] = KEY_D,
208 [SDL_SCANCODE_F] = KEY_F,
209 [SDL_SCANCODE_G] = KEY_G,
210 [SDL_SCANCODE_H] = KEY_H,
211 [SDL_SCANCODE_J] = KEY_J,
212 [SDL_SCANCODE_K] = KEY_K,
213 [SDL_SCANCODE_L] = KEY_L,
214 [SDL_SCANCODE_SEMICOLON] = KEY_SEMICOLON,
215 [SDL_SCANCODE_APOSTROPHE] = KEY_APOSTROPHE,
216 [SDL_SCANCODE_GRAVE] = KEY_GRAVE,
217 [SDL_SCANCODE_LSHIFT] = KEY_LEFTSHIFT,
218 [SDL_SCANCODE_BACKSLASH] = KEY_BACKSLASH,
219 [SDL_SCANCODE_Z] = KEY_Z,
220 [SDL_SCANCODE_X] = KEY_X,
221 [SDL_SCANCODE_C] = KEY_C,
222 [SDL_SCANCODE_V] = KEY_V,
223 [SDL_SCANCODE_B] = KEY_B,
224 [SDL_SCANCODE_N] = KEY_N,
225 [SDL_SCANCODE_M] = KEY_M,
226 [SDL_SCANCODE_COMMA] = KEY_COMMA,
227 [SDL_SCANCODE_PERIOD] = KEY_DOT,
228 [SDL_SCANCODE_SLASH] = KEY_SLASH,
229 [SDL_SCANCODE_RSHIFT] = KEY_RIGHTSHIFT,
230 [SDL_SCANCODE_KP_MULTIPLY] = KEY_KPASTERISK,
231 [SDL_SCANCODE_LALT] = KEY_LEFTALT,
232 [SDL_SCANCODE_SPACE] = KEY_SPACE,
233 [SDL_SCANCODE_CAPSLOCK] = KEY_CAPSLOCK,
234 [SDL_SCANCODE_F1] = KEY_F1,
235 [SDL_SCANCODE_F2] = KEY_F2,
236 [SDL_SCANCODE_F3] = KEY_F3,
237 [SDL_SCANCODE_F4] = KEY_F4,
238 [SDL_SCANCODE_F5] = KEY_F5,
239 [SDL_SCANCODE_F6] = KEY_F6,
240 [SDL_SCANCODE_F7] = KEY_F7,
241 [SDL_SCANCODE_F8] = KEY_F8,
242 [SDL_SCANCODE_F9] = KEY_F9,
243 [SDL_SCANCODE_F10] = KEY_F10,
244 [SDL_SCANCODE_NUMLOCKCLEAR] = KEY_NUMLOCK,
245 [SDL_SCANCODE_SCROLLLOCK] = KEY_SCROLLLOCK,
246 [SDL_SCANCODE_KP_7] = KEY_KP7,
247 [SDL_SCANCODE_KP_8] = KEY_KP8,
248 [SDL_SCANCODE_KP_9] = KEY_KP9,
249 [SDL_SCANCODE_KP_MINUS] = KEY_KPMINUS,
250 [SDL_SCANCODE_KP_4] = KEY_KP4,
251 [SDL_SCANCODE_KP_5] = KEY_KP5,
252 [SDL_SCANCODE_KP_6] = KEY_KP6,
253 [SDL_SCANCODE_KP_PLUS] = KEY_KPPLUS,
254 [SDL_SCANCODE_KP_1] = KEY_KP1,
255 [SDL_SCANCODE_KP_2] = KEY_KP2,
256 [SDL_SCANCODE_KP_3] = KEY_KP3,
257 [SDL_SCANCODE_KP_0] = KEY_KP0,
258 [SDL_SCANCODE_KP_PERIOD] = KEY_KPDOT,
259 /* key 84 does not exist linux_input.h */
260 [SDL_SCANCODE_LANG5] = KEY_ZENKAKUHANKAKU,
261 [SDL_SCANCODE_NONUSBACKSLASH] = KEY_102ND,
262 [SDL_SCANCODE_F11] = KEY_F11,
263 [SDL_SCANCODE_F12] = KEY_F12,
264 [SDL_SCANCODE_INTERNATIONAL1] = KEY_RO,
265 [SDL_SCANCODE_LANG3] = KEY_KATAKANA,
266 [SDL_SCANCODE_LANG4] = KEY_HIRAGANA,
267 [SDL_SCANCODE_INTERNATIONAL4] = KEY_HENKAN,
268 [SDL_SCANCODE_INTERNATIONAL2] = KEY_KATAKANAHIRAGANA,
269 [SDL_SCANCODE_INTERNATIONAL5] = KEY_MUHENKAN,
270 /* [SDL_SCANCODE_INTERNATIONAL5] -> [KEY_KPJPCOMMA] */
271 [SDL_SCANCODE_KP_ENTER] = KEY_KPENTER,
272 [SDL_SCANCODE_RCTRL] = KEY_RIGHTCTRL,
273 [SDL_SCANCODE_KP_DIVIDE] = KEY_KPSLASH,
274 [SDL_SCANCODE_SYSREQ] = KEY_SYSRQ,
275 [SDL_SCANCODE_RALT] = KEY_RIGHTALT,
276 /* KEY_LINEFEED */
277 [SDL_SCANCODE_HOME] = KEY_HOME,
278 [SDL_SCANCODE_UP] = KEY_UP,
279 [SDL_SCANCODE_PAGEUP] = KEY_PAGEUP,
280 [SDL_SCANCODE_LEFT] = KEY_LEFT,
281 [SDL_SCANCODE_RIGHT] = KEY_RIGHT,
282 [SDL_SCANCODE_END] = KEY_END,
283 [SDL_SCANCODE_DOWN] = KEY_DOWN,
284 [SDL_SCANCODE_PAGEDOWN] = KEY_PAGEDOWN,
285 [SDL_SCANCODE_INSERT] = KEY_INSERT,
286 [SDL_SCANCODE_DELETE] = KEY_DELETE,
287 /* KEY_MACRO */
288 [SDL_SCANCODE_MUTE] = KEY_MUTE,
289 [SDL_SCANCODE_VOLUMEDOWN] = KEY_VOLUMEDOWN,
290 [SDL_SCANCODE_VOLUMEUP] = KEY_VOLUMEUP,
291 [SDL_SCANCODE_POWER] = KEY_POWER,
292 [SDL_SCANCODE_KP_EQUALS] = KEY_KPEQUAL,
293 [SDL_SCANCODE_KP_PLUSMINUS] = KEY_KPPLUSMINUS,
294 [SDL_SCANCODE_PAUSE] = KEY_PAUSE,
295 /* KEY_SCALE */
296 [SDL_SCANCODE_KP_COMMA] = KEY_KPCOMMA,
297 [SDL_SCANCODE_LANG1] = KEY_HANGUEL,
298 [SDL_SCANCODE_LANG2] = KEY_HANJA,
299 [SDL_SCANCODE_INTERNATIONAL3] = KEY_YEN,
300 [SDL_SCANCODE_LGUI] = KEY_LEFTMETA,
301 [SDL_SCANCODE_RGUI] = KEY_RIGHTMETA,
302 [SDL_SCANCODE_APPLICATION] = KEY_COMPOSE,
303 };
304
sandbox_sdl_scan_keys(int key[],int max_keys)305 int sandbox_sdl_scan_keys(int key[], int max_keys)
306 {
307 const Uint8 *keystate;
308 int num_keys;
309 int i, count;
310
311 sandbox_sdl_poll_events();
312 keystate = SDL_GetKeyboardState(&num_keys);
313 for (i = count = 0; i < num_keys; i++) {
314 if (count < max_keys && keystate[i]) {
315 int keycode = sdl_to_keycode[i];
316
317 if (keycode)
318 key[count++] = keycode;
319 }
320 }
321
322 return count;
323 }
324
sandbox_sdl_key_pressed(int keycode)325 int sandbox_sdl_key_pressed(int keycode)
326 {
327 int key[8]; /* allow up to 8 keys to be pressed at once */
328 int count;
329 int i;
330
331 count = sandbox_sdl_scan_keys(key, sizeof(key) / sizeof(key[0]));
332 for (i = 0; i < count; i++) {
333 if (key[i] == keycode)
334 return 0;
335 }
336
337 return -ENOENT;
338 }
339
sandbox_sdl_fill_audio(void * udata,Uint8 * stream,int len)340 void sandbox_sdl_fill_audio(void *udata, Uint8 *stream, int len)
341 {
342 struct buf_info *buf;
343 int avail;
344 bool have_data = false;
345 int i;
346
347 for (i = 0; i < 2; i++) {
348 buf = &sdl.buf[sdl.cur_buf];
349 avail = buf->size - buf->pos;
350 if (avail <= 0) {
351 sdl.cur_buf = 1 - sdl.cur_buf;
352 continue;
353 }
354 if (avail > len)
355 avail = len;
356 have_data = true;
357
358 SDL_MixAudio(stream, buf->data + buf->pos, avail,
359 SDL_MIX_MAXVOLUME);
360 buf->pos += avail;
361 len -= avail;
362
363 /* Move to next buffer if we are at the end */
364 if (buf->pos == buf->size)
365 buf->size = 0;
366 else
367 break;
368 }
369 sdl.stopping = !have_data;
370 }
371
sandbox_sdl_sound_init(int rate,int channels)372 int sandbox_sdl_sound_init(int rate, int channels)
373 {
374 SDL_AudioSpec wanted, have;
375 int i;
376
377 if (sandbox_sdl_ensure_init())
378 return -1;
379
380 if (sdl.audio_active)
381 return 0;
382
383 /* Set the audio format */
384 wanted.freq = rate;
385 wanted.format = AUDIO_S16;
386 wanted.channels = channels;
387 wanted.samples = 1024; /* Good low-latency value for callback */
388 wanted.callback = sandbox_sdl_fill_audio;
389 wanted.userdata = NULL;
390
391 for (i = 0; i < 2; i++) {
392 struct buf_info *buf = &sdl.buf[i];
393
394 buf->alloced = sizeof(uint16_t) * wanted.freq * wanted.channels;
395 buf->data = malloc(buf->alloced);
396 if (!buf->data) {
397 printf("%s: Out of memory\n", __func__);
398 if (i == 1)
399 free(sdl.buf[0].data);
400 return -1;
401 }
402 buf->pos = 0;
403 buf->size = 0;
404 }
405
406 if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
407 printf("Unable to initialise SDL audio: %s\n", SDL_GetError());
408 goto err;
409 }
410
411 /* Open the audio device, forcing the desired format */
412 if (SDL_OpenAudio(&wanted, &have) < 0) {
413 printf("Couldn't open audio: %s\n", SDL_GetError());
414 goto err;
415 }
416 if (have.format != wanted.format) {
417 printf("Couldn't select required audio format\n");
418 goto err;
419 }
420 sdl.audio_active = true;
421 sdl.sample_rate = wanted.freq;
422 sdl.cur_buf = 0;
423 sdl.running = false;
424
425 return 0;
426
427 err:
428 for (i = 0; i < 2; i++)
429 free(sdl.buf[i].data);
430 return -1;
431 }
432
sandbox_sdl_sound_play(const void * data,uint size)433 int sandbox_sdl_sound_play(const void *data, uint size)
434 {
435 struct buf_info *buf;
436
437 if (!sdl.audio_active)
438 return 0;
439
440 buf = &sdl.buf[0];
441 if (buf->size)
442 buf = &sdl.buf[1];
443 while (buf->size)
444 usleep(1000);
445
446 if (size > buf->alloced)
447 return -E2BIG;
448
449 memcpy(buf->data, data, size);
450 buf->size = size;
451 buf->pos = 0;
452 if (!sdl.running) {
453 SDL_PauseAudio(0);
454 sdl.running = true;
455 sdl.stopping = false;
456 }
457
458 return 0;
459 }
460
sandbox_sdl_sound_stop(void)461 int sandbox_sdl_sound_stop(void)
462 {
463 if (sdl.running) {
464 while (!sdl.stopping)
465 SDL_Delay(100);
466
467 SDL_PauseAudio(1);
468 sdl.running = 0;
469 sdl.stopping = false;
470 }
471
472 return 0;
473 }
474