xref: /openbmc/u-boot/arch/sandbox/cpu/sdl.c (revision 7237d22b)
1 /*
2  * Copyright (c) 2013 Google, Inc
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <errno.h>
8 #include <linux/input.h>
9 #include <SDL/SDL.h>
10 #include <sound.h>
11 #include <asm/state.h>
12 
13 static struct sdl_info {
14 	SDL_Surface *screen;
15 	int width;
16 	int height;
17 	int depth;
18 	int pitch;
19 	uint frequency;
20 	uint audio_pos;
21 	uint audio_size;
22 	uint8_t *audio_data;
23 	bool audio_active;
24 	bool inited;
25 } sdl;
26 
27 static void sandbox_sdl_poll_events(void)
28 {
29 	/*
30 	 * We don't want to include common.h in this file since it uses
31 	 * system headers. So add a declation here.
32 	 */
33 	extern void reset_cpu(unsigned long addr);
34 	SDL_Event event;
35 
36 	while (SDL_PollEvent(&event)) {
37 		switch (event.type) {
38 		case SDL_QUIT:
39 			puts("LCD window closed - quitting\n");
40 			reset_cpu(1);
41 			break;
42 		}
43 	}
44 }
45 
46 static int sandbox_sdl_ensure_init(void)
47 {
48 	if (!sdl.inited) {
49 		if (SDL_Init(0) < 0) {
50 			printf("Unable to initialize SDL: %s\n",
51 			       SDL_GetError());
52 			return -EIO;
53 		}
54 
55 		atexit(SDL_Quit);
56 
57 		sdl.inited = true;
58 	}
59 	return 0;
60 }
61 
62 int sandbox_sdl_init_display(int width, int height, int log2_bpp)
63 {
64 	struct sandbox_state *state = state_get_current();
65 	int err;
66 
67 	if (!width || !state->show_lcd)
68 		return 0;
69 	err = sandbox_sdl_ensure_init();
70 	if (err)
71 		return err;
72 	if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) {
73 		printf("Unable to initialize SDL LCD: %s\n", SDL_GetError());
74 		return -EPERM;
75 	}
76 	SDL_WM_SetCaption("U-Boot", "U-Boot");
77 
78 	sdl.width = width;
79 	sdl.height = height;
80 	sdl.depth = 1 << log2_bpp;
81 	sdl.pitch = sdl.width * sdl.depth / 8;
82 	sdl.screen = SDL_SetVideoMode(width, height, 0, 0);
83 	sandbox_sdl_poll_events();
84 
85 	return 0;
86 }
87 
88 int sandbox_sdl_sync(void *lcd_base)
89 {
90 	SDL_Surface *frame;
91 
92 	frame = SDL_CreateRGBSurfaceFrom(lcd_base, sdl.width, sdl.height,
93 			sdl.depth, sdl.pitch,
94 			0x1f << 11, 0x3f << 5, 0x1f << 0, 0);
95 	SDL_BlitSurface(frame, NULL, sdl.screen, NULL);
96 	SDL_FreeSurface(frame);
97 	SDL_UpdateRect(sdl.screen, 0, 0, 0, 0);
98 	sandbox_sdl_poll_events();
99 
100 	return 0;
101 }
102 
103 #define NONE (-1)
104 #define NUM_SDL_CODES	(SDLK_UNDO + 1)
105 
106 static int16_t sdl_to_keycode[NUM_SDL_CODES] = {
107 	/* 0 */
108 	NONE, NONE, NONE, NONE, NONE,
109 	NONE, NONE, NONE, KEY_BACKSPACE, KEY_TAB,
110 	NONE, NONE, NONE, KEY_ENTER, NONE,
111 	NONE, NONE, NONE, NONE, KEY_POWER,	/* use PAUSE as POWER */
112 
113 	/* 20 */
114 	NONE, NONE, NONE, NONE, NONE,
115 	NONE, NONE, KEY_ESC, NONE, NONE,
116 	NONE, NONE, KEY_SPACE, NONE, NONE,
117 	NONE, NONE, NONE, NONE, NONE,
118 
119 	/* 40 */
120 	NONE, NONE, NONE, NONE, KEY_COMMA,
121 	KEY_MINUS, KEY_DOT, KEY_SLASH, KEY_0, KEY_1,
122 	KEY_2, KEY_3, KEY_4, KEY_5, KEY_6,
123 	KEY_7, KEY_8, KEY_9, NONE, KEY_SEMICOLON,
124 
125 	/* 60 */
126 	NONE, KEY_EQUAL, NONE, NONE, NONE,
127 	NONE, NONE, NONE, NONE, NONE,
128 	NONE, NONE, NONE, NONE, NONE,
129 	NONE, NONE, NONE, NONE, NONE,
130 
131 	/* 80 */
132 	NONE, NONE, NONE, NONE, NONE,
133 	NONE, NONE, NONE, NONE, NONE,
134 	NONE, NONE, KEY_BACKSLASH, NONE, NONE,
135 	NONE, KEY_GRAVE, KEY_A, KEY_B, KEY_C,
136 
137 	/* 100 */
138 	KEY_D, KEY_E, KEY_F, KEY_G, KEY_H,
139 	KEY_I, KEY_J, KEY_K, KEY_L, KEY_M,
140 	KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R,
141 	KEY_S, KEY_T, KEY_U, KEY_V, KEY_W,
142 
143 	/* 120 */
144 	KEY_X, KEY_Y, KEY_Z, NONE, NONE,
145 	NONE, NONE, KEY_DELETE, NONE, NONE,
146 	NONE, NONE, NONE, NONE, NONE,
147 	NONE, NONE, NONE, NONE, NONE,
148 
149 	/* 140 */
150 	NONE, NONE, NONE, NONE, NONE,
151 	NONE, NONE, NONE, NONE, NONE,
152 	NONE, NONE, NONE, NONE, NONE,
153 	NONE, NONE, NONE, NONE, NONE,
154 
155 	/* 160 */
156 	NONE, NONE, NONE, NONE, NONE,
157 	NONE, NONE, NONE, NONE, NONE,
158 	NONE, NONE, NONE, NONE, NONE,
159 	NONE, NONE, NONE, NONE, NONE,
160 
161 	/* 180 */
162 	NONE, NONE, NONE, NONE, NONE,
163 	NONE, NONE, NONE, NONE, NONE,
164 	NONE, NONE, NONE, NONE, NONE,
165 	NONE, NONE, NONE, NONE, NONE,
166 
167 	/* 200 */
168 	NONE, NONE, NONE, NONE, NONE,
169 	NONE, NONE, NONE, NONE, NONE,
170 	NONE, NONE, NONE, NONE, NONE,
171 	NONE, NONE, NONE, NONE, NONE,
172 
173 	/* 220 */
174 	NONE, NONE, NONE, NONE, NONE,
175 	NONE, NONE, NONE, NONE, NONE,
176 	NONE, NONE, NONE, NONE, NONE,
177 	NONE, NONE, NONE, NONE, NONE,
178 
179 	/* 240 */
180 	NONE, NONE, NONE, NONE, NONE,
181 	NONE, NONE, NONE, NONE, NONE,
182 	NONE, NONE, NONE, NONE, NONE,
183 	NONE, KEY_KP0, KEY_KP1, KEY_KP2, KEY_KP3,
184 
185 	/* 260 */
186 	KEY_KP4, KEY_KP5, KEY_KP6, KEY_KP7, KEY_KP8,
187 	KEY_KP9, KEY_KPDOT, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS,
188 	KEY_KPPLUS, KEY_KPENTER, KEY_KPEQUAL, KEY_UP, KEY_DOWN,
189 	KEY_RIGHT, KEY_LEFT, KEY_INSERT, KEY_HOME, KEY_END,
190 
191 	/* 280 */
192 	KEY_PAGEUP, KEY_PAGEDOWN, KEY_F1, KEY_F2, KEY_F3,
193 	KEY_F4, KEY_F5, KEY_F6, KEY_F7, KEY_F8,
194 	KEY_F9, KEY_F10, KEY_F11, KEY_F12, NONE,
195 	NONE, NONE, NONE, NONE, NONE,
196 
197 	/* 300 */
198 	KEY_NUMLOCK, KEY_CAPSLOCK, KEY_SCROLLLOCK, KEY_RIGHTSHIFT,
199 		KEY_LEFTSHIFT,
200 	KEY_RIGHTCTRL, KEY_LEFTCTRL, KEY_RIGHTALT, KEY_LEFTALT, KEY_RIGHTMETA,
201 	KEY_LEFTMETA, NONE, KEY_FN, NONE, KEY_COMPOSE,
202 	NONE, KEY_PRINT, KEY_SYSRQ, KEY_PAUSE, NONE,
203 
204 	/* 320 */
205 	NONE, NONE, NONE,
206 };
207 
208 int sandbox_sdl_scan_keys(int key[], int max_keys)
209 {
210 	Uint8 *keystate;
211 	int i, count;
212 
213 	sandbox_sdl_poll_events();
214 	keystate = SDL_GetKeyState(NULL);
215 	for (i = count = 0; i < NUM_SDL_CODES; i++) {
216 		if (count >= max_keys)
217 			break;
218 		else if (keystate[i])
219 			key[count++] = sdl_to_keycode[i];
220 	}
221 
222 	return count;
223 }
224 
225 int sandbox_sdl_key_pressed(int keycode)
226 {
227 	int key[8];	/* allow up to 8 keys to be pressed at once */
228 	int count;
229 	int i;
230 
231 	count = sandbox_sdl_scan_keys(key, sizeof(key) / sizeof(key[0]));
232 	for (i = 0; i < count; i++) {
233 		if (key[i] == keycode)
234 			return 0;
235 	}
236 
237 	return -ENOENT;
238 }
239 
240 void sandbox_sdl_fill_audio(void *udata, Uint8 *stream, int len)
241 {
242 	int avail;
243 
244 	avail = sdl.audio_size - sdl.audio_pos;
245 	if (avail < len)
246 		len = avail;
247 
248 	SDL_MixAudio(stream, sdl.audio_data + sdl.audio_pos, len,
249 		     SDL_MIX_MAXVOLUME);
250 	sdl.audio_pos += len;
251 
252 	/* Loop if we are at the end */
253 	if (sdl.audio_pos == sdl.audio_size)
254 		sdl.audio_pos = 0;
255 }
256 
257 int sandbox_sdl_sound_init(void)
258 {
259 	SDL_AudioSpec wanted;
260 
261 	if (sandbox_sdl_ensure_init())
262 		return -1;
263 
264 	if (sdl.audio_active)
265 		return 0;
266 
267 	/*
268 	 * At present all sandbox sounds crash. This is probably due to
269 	 * symbol name conflicts with U-Boot. We can remove the malloc()
270 	 * probles with:
271 	 *
272 	 * #define USE_DL_PREFIX
273 	 *
274 	 * and get this:
275 	 *
276 	 * Assertion 'e->pollfd->fd == e->fd' failed at pulse/mainloop.c:676,
277 	 *		function dispatch_pollfds(). Aborting.
278 	 *
279 	 * The right solution is probably to make U-Boot's names private or
280 	 * link os.c and sdl.c against their libraries before liking with
281 	 * U-Boot. TBD. For now sound is disabled.
282 	 */
283 	printf("(Warning: sandbox sound disabled)\n");
284 	return 0;
285 
286 	/* Set the audio format */
287 	wanted.freq = 22050;
288 	wanted.format = AUDIO_S16;
289 	wanted.channels = 1;    /* 1 = mono, 2 = stereo */
290 	wanted.samples = 1024;  /* Good low-latency value for callback */
291 	wanted.callback = sandbox_sdl_fill_audio;
292 	wanted.userdata = NULL;
293 
294 	sdl.audio_size = sizeof(uint16_t) * wanted.freq;
295 	sdl.audio_data = malloc(sdl.audio_size);
296 	if (!sdl.audio_data) {
297 		printf("%s: Out of memory\n", __func__);
298 		return -1;
299 	}
300 	sdl.audio_pos = 0;
301 
302 	if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
303 		printf("Unable to initialize SDL audio: %s\n", SDL_GetError());
304 		goto err;
305 	}
306 
307 	/* Open the audio device, forcing the desired format */
308 	if (SDL_OpenAudio(&wanted, NULL) < 0) {
309 		printf("Couldn't open audio: %s\n", SDL_GetError());
310 		goto err;
311 	}
312 	sdl.audio_active = true;
313 
314 	return 0;
315 
316 err:
317 	free(sdl.audio_data);
318 	return -1;
319 }
320 
321 int sandbox_sdl_sound_start(uint frequency)
322 {
323 	if (!sdl.audio_active)
324 		return -1;
325 	sdl.frequency = frequency;
326 	sound_create_square_wave((unsigned short *)sdl.audio_data,
327 				 sdl.audio_size, frequency);
328 	sdl.audio_pos = 0;
329 	SDL_PauseAudio(0);
330 
331 	return 0;
332 }
333 
334 int sandbox_sdl_sound_stop(void)
335 {
336 	if (!sdl.audio_active)
337 		return -1;
338 	SDL_PauseAudio(1);
339 
340 	return 0;
341 }
342