u-boot/arch/sandbox/cpu/sdl.c

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/*
* Copyright (c) 2013 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <errno.h>
#include <linux/input.h>
#include <SDL/SDL.h>
#include <sound.h>
#include <asm/state.h>
static struct sdl_info {
SDL_Surface *screen;
int width;
int height;
int depth;
int pitch;
uint frequency;
uint audio_pos;
uint audio_size;
uint8_t *audio_data;
bool audio_active;
bool inited;
} sdl;
static void sandbox_sdl_poll_events(void)
{
/*
* We don't want to include common.h in this file since it uses
* system headers. So add a declation here.
*/
extern void reset_cpu(unsigned long addr);
SDL_Event event;
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_QUIT:
puts("LCD window closed - quitting\n");
reset_cpu(1);
break;
}
}
}
static int sandbox_sdl_ensure_init(void)
{
if (!sdl.inited) {
if (SDL_Init(0) < 0) {
printf("Unable to initialize SDL: %s\n",
SDL_GetError());
return -EIO;
}
atexit(SDL_Quit);
sdl.inited = true;
}
return 0;
}
int sandbox_sdl_init_display(int width, int height, int log2_bpp)
{
struct sandbox_state *state = state_get_current();
int err;
if (!width || !state->show_lcd)
return 0;
err = sandbox_sdl_ensure_init();
if (err)
return err;
if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) {
printf("Unable to initialize SDL LCD: %s\n", SDL_GetError());
return -EPERM;
}
SDL_WM_SetCaption("U-Boot", "U-Boot");
sdl.width = width;
sdl.height = height;
sdl.depth = 1 << log2_bpp;
sdl.pitch = sdl.width * sdl.depth / 8;
sdl.screen = SDL_SetVideoMode(width, height, 0, 0);
sandbox_sdl_poll_events();
return 0;
}
int sandbox_sdl_sync(void *lcd_base)
{
SDL_Surface *frame;
frame = SDL_CreateRGBSurfaceFrom(lcd_base, sdl.width, sdl.height,
sdl.depth, sdl.pitch,
0x1f << 11, 0x3f << 5, 0x1f << 0, 0);
SDL_BlitSurface(frame, NULL, sdl.screen, NULL);
SDL_FreeSurface(frame);
SDL_UpdateRect(sdl.screen, 0, 0, 0, 0);
sandbox_sdl_poll_events();
return 0;
}
#define NONE (-1)
#define NUM_SDL_CODES (SDLK_UNDO + 1)
static int16_t sdl_to_keycode[NUM_SDL_CODES] = {
/* 0 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, KEY_BACKSPACE, KEY_TAB,
NONE, NONE, NONE, KEY_ENTER, NONE,
NONE, NONE, NONE, NONE, KEY_POWER, /* use PAUSE as POWER */
/* 20 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, KEY_ESC, NONE, NONE,
NONE, NONE, KEY_SPACE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 40 */
NONE, NONE, NONE, NONE, KEY_COMMA,
KEY_MINUS, KEY_DOT, KEY_SLASH, KEY_0, KEY_1,
KEY_2, KEY_3, KEY_4, KEY_5, KEY_6,
KEY_7, KEY_8, KEY_9, NONE, KEY_SEMICOLON,
/* 60 */
NONE, KEY_EQUAL, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 80 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, KEY_BACKSLASH, NONE, NONE,
NONE, KEY_GRAVE, KEY_A, KEY_B, KEY_C,
/* 100 */
KEY_D, KEY_E, KEY_F, KEY_G, KEY_H,
KEY_I, KEY_J, KEY_K, KEY_L, KEY_M,
KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R,
KEY_S, KEY_T, KEY_U, KEY_V, KEY_W,
/* 120 */
KEY_X, KEY_Y, KEY_Z, NONE, NONE,
NONE, NONE, KEY_DELETE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 140 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 160 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 180 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 200 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 220 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 240 */
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, NONE, NONE, NONE, NONE,
NONE, KEY_KP0, KEY_KP1, KEY_KP2, KEY_KP3,
/* 260 */
KEY_KP4, KEY_KP5, KEY_KP6, KEY_KP7, KEY_KP8,
KEY_KP9, KEY_KPDOT, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS,
KEY_KPPLUS, KEY_KPENTER, KEY_KPEQUAL, KEY_UP, KEY_DOWN,
KEY_RIGHT, KEY_LEFT, KEY_INSERT, KEY_HOME, KEY_END,
/* 280 */
KEY_PAGEUP, KEY_PAGEDOWN, KEY_F1, KEY_F2, KEY_F3,
KEY_F4, KEY_F5, KEY_F6, KEY_F7, KEY_F8,
KEY_F9, KEY_F10, KEY_F11, KEY_F12, NONE,
NONE, NONE, NONE, NONE, NONE,
/* 300 */
KEY_NUMLOCK, KEY_CAPSLOCK, KEY_SCROLLLOCK, KEY_RIGHTSHIFT,
KEY_LEFTSHIFT,
KEY_RIGHTCTRL, KEY_LEFTCTRL, KEY_RIGHTALT, KEY_LEFTALT, KEY_RIGHTMETA,
KEY_LEFTMETA, NONE, KEY_FN, NONE, KEY_COMPOSE,
NONE, KEY_PRINT, KEY_SYSRQ, KEY_PAUSE, NONE,
/* 320 */
NONE, NONE, NONE,
};
int sandbox_sdl_scan_keys(int key[], int max_keys)
{
Uint8 *keystate;
int i, count;
sandbox_sdl_poll_events();
keystate = SDL_GetKeyState(NULL);
for (i = count = 0; i < NUM_SDL_CODES; i++) {
if (count >= max_keys)
break;
else if (keystate[i])
key[count++] = sdl_to_keycode[i];
}
return count;
}
int sandbox_sdl_key_pressed(int keycode)
{
int key[8]; /* allow up to 8 keys to be pressed at once */
int count;
int i;
count = sandbox_sdl_scan_keys(key, sizeof(key) / sizeof(key[0]));
for (i = 0; i < count; i++) {
if (key[i] == keycode)
return 0;
}
return -ENOENT;
}
void sandbox_sdl_fill_audio(void *udata, Uint8 *stream, int len)
{
int avail;
avail = sdl.audio_size - sdl.audio_pos;
if (avail < len)
len = avail;
SDL_MixAudio(stream, sdl.audio_data + sdl.audio_pos, len,
SDL_MIX_MAXVOLUME);
sdl.audio_pos += len;
/* Loop if we are at the end */
if (sdl.audio_pos == sdl.audio_size)
sdl.audio_pos = 0;
}
int sandbox_sdl_sound_init(void)
{
SDL_AudioSpec wanted;
if (sandbox_sdl_ensure_init())
return -1;
if (sdl.audio_active)
return 0;
/*
* At present all sandbox sounds crash. This is probably due to
* symbol name conflicts with U-Boot. We can remove the malloc()
* probles with:
*
* #define USE_DL_PREFIX
*
* and get this:
*
* Assertion 'e->pollfd->fd == e->fd' failed at pulse/mainloop.c:676,
* function dispatch_pollfds(). Aborting.
*
* The right solution is probably to make U-Boot's names private or
* link os.c and sdl.c against their libraries before liking with
* U-Boot. TBD. For now sound is disabled.
*/
printf("(Warning: sandbox sound disabled)\n");
return 0;
/* Set the audio format */
wanted.freq = 22050;
wanted.format = AUDIO_S16;
wanted.channels = 1; /* 1 = mono, 2 = stereo */
wanted.samples = 1024; /* Good low-latency value for callback */
wanted.callback = sandbox_sdl_fill_audio;
wanted.userdata = NULL;
sdl.audio_size = sizeof(uint16_t) * wanted.freq;
sdl.audio_data = malloc(sdl.audio_size);
if (!sdl.audio_data) {
printf("%s: Out of memory\n", __func__);
return -1;
}
sdl.audio_pos = 0;
if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
printf("Unable to initialize SDL audio: %s\n", SDL_GetError());
goto err;
}
/* Open the audio device, forcing the desired format */
if (SDL_OpenAudio(&wanted, NULL) < 0) {
printf("Couldn't open audio: %s\n", SDL_GetError());
goto err;
}
sdl.audio_active = true;
return 0;
err:
free(sdl.audio_data);
return -1;
}
int sandbox_sdl_sound_start(uint frequency)
{
if (!sdl.audio_active)
return -1;
sdl.frequency = frequency;
sound_create_square_wave((unsigned short *)sdl.audio_data,
sdl.audio_size, frequency);
sdl.audio_pos = 0;
SDL_PauseAudio(0);
return 0;
}
int sandbox_sdl_sound_stop(void)
{
if (!sdl.audio_active)
return -1;
SDL_PauseAudio(1);
return 0;
}