diff options
Diffstat (limited to 'roms/u-boot/arch/sandbox/cpu/sdl.c')
| -rw-r--r-- | roms/u-boot/arch/sandbox/cpu/sdl.c | 473 |
1 files changed, 473 insertions, 0 deletions
diff --git a/roms/u-boot/arch/sandbox/cpu/sdl.c b/roms/u-boot/arch/sandbox/cpu/sdl.c new file mode 100644 index 000000000..8102649be --- /dev/null +++ b/roms/u-boot/arch/sandbox/cpu/sdl.c @@ -0,0 +1,473 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2013 Google, Inc + */ + +#include <errno.h> +#include <unistd.h> +#include <stdbool.h> +#include <linux/input.h> +#include <SDL2/SDL.h> +#include <asm/state.h> + +/** + * struct buf_info - a data buffer holding audio data + * + * @pos: Current position playing in audio buffer + * @size: Size of data in audio buffer (0=empty) + * @alloced: Allocated size of audio buffer (max size it can hold) + * @data: Audio data + */ +struct buf_info { + uint pos; + uint size; + uint alloced; + uint8_t *data; +}; + +/** + * struct sdl_info - Information about our use of the SDL library + * + * @width: Width of simulated LCD display + * @height: Height of simulated LCD display + * @vis_width: Visible width (may be larger to allow for scaling up) + * @vis_height: Visible height (may be larger to allow for scaling up) + * @depth: Depth of the display in bits per pixel (16 or 32) + * @pitch: Number of bytes per line of the display + * @sample_rate: Current sample rate for audio + * @audio_active: true if audio can be used + * @inited: true if this module is initialised + * @cur_buf: Current audio buffer being used by sandbox_sdl_fill_audio (0 or 1) + * @buf: The two available audio buffers. SDL can be reading from one while we + * are setting up the next + * @running: true if audio is running + * @stopping: true if audio will stop once it runs out of data + * @texture: SDL texture to use for U-Boot display contents + * @renderer: SDL renderer to use + */ +static struct sdl_info { + int width; + int height; + int vis_width; + int vis_height; + int depth; + int pitch; + uint sample_rate; + bool audio_active; + bool inited; + int cur_buf; + struct buf_info buf[2]; + bool running; + bool stopping; + SDL_Texture *texture; + SDL_Renderer *renderer; +} 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(void); + SDL_Event event; + + while (SDL_PollEvent(&event)) { + switch (event.type) { + case SDL_QUIT: + puts("LCD window closed - quitting\n"); + reset_cpu(); + break; + } + } +} + +static int sandbox_sdl_ensure_init(void) +{ + if (!sdl.inited) { + if (SDL_Init(0) < 0) { + printf("Unable to initialise 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, + bool double_size) +{ + 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 initialise SDL LCD: %s\n", SDL_GetError()); + return -EPERM; + } + sdl.width = width; + sdl.height = height; + if (double_size) { + sdl.vis_width = sdl.width * 2; + sdl.vis_height = sdl.height * 2; + } else { + sdl.vis_width = sdl.width; + sdl.vis_height = sdl.height; + } + + sdl.depth = 1 << log2_bpp; + sdl.pitch = sdl.width * sdl.depth / 8; + SDL_Window *screen = SDL_CreateWindow("U-Boot", SDL_WINDOWPOS_UNDEFINED, + SDL_WINDOWPOS_UNDEFINED, + sdl.vis_width, sdl.vis_height, + SDL_WINDOW_RESIZABLE); + if (!screen) { + printf("Unable to initialise SDL screen: %s\n", + SDL_GetError()); + return -EIO; + } + if (log2_bpp != 4 && log2_bpp != 5) { + printf("U-Boot SDL does not support depth %d\n", log2_bpp); + return -EINVAL; + } + sdl.renderer = SDL_CreateRenderer(screen, -1, + SDL_RENDERER_ACCELERATED | + SDL_RENDERER_PRESENTVSYNC); + if (!sdl.renderer) { + printf("Unable to initialise SDL renderer: %s\n", + SDL_GetError()); + return -EIO; + } + + sdl.texture = SDL_CreateTexture(sdl.renderer, log2_bpp == 4 ? + SDL_PIXELFORMAT_RGB565 : + SDL_PIXELFORMAT_RGB888, + SDL_TEXTUREACCESS_STREAMING, + width, height); + if (!sdl.texture) { + printf("Unable to initialise SDL texture: %s\n", + SDL_GetError()); + return -EBADF; + } + sandbox_sdl_poll_events(); + + return 0; +} + +int sandbox_sdl_sync(void *lcd_base) +{ + SDL_UpdateTexture(sdl.texture, NULL, lcd_base, sdl.pitch); + SDL_RenderCopy(sdl.renderer, sdl.texture, NULL, NULL); + SDL_RenderPresent(sdl.renderer); + sandbox_sdl_poll_events(); + + return 0; +} + +static const unsigned short sdl_to_keycode[SDL_NUM_SCANCODES] = { + [SDL_SCANCODE_ESCAPE] = KEY_ESC, + [SDL_SCANCODE_1] = KEY_1, + [SDL_SCANCODE_2] = KEY_2, + [SDL_SCANCODE_3] = KEY_3, + [SDL_SCANCODE_4] = KEY_4, + [SDL_SCANCODE_5] = KEY_5, + [SDL_SCANCODE_6] = KEY_6, + [SDL_SCANCODE_7] = KEY_7, + [SDL_SCANCODE_8] = KEY_8, + [SDL_SCANCODE_9] = KEY_9, + [SDL_SCANCODE_0] = KEY_0, + [SDL_SCANCODE_MINUS] = KEY_MINUS, + [SDL_SCANCODE_EQUALS] = KEY_EQUAL, + [SDL_SCANCODE_BACKSPACE] = KEY_BACKSPACE, + [SDL_SCANCODE_TAB] = KEY_TAB, + [SDL_SCANCODE_Q] = KEY_Q, + [SDL_SCANCODE_W] = KEY_W, + [SDL_SCANCODE_E] = KEY_E, + [SDL_SCANCODE_R] = KEY_R, + [SDL_SCANCODE_T] = KEY_T, + [SDL_SCANCODE_Y] = KEY_Y, + [SDL_SCANCODE_U] = KEY_U, + [SDL_SCANCODE_I] = KEY_I, + [SDL_SCANCODE_O] = KEY_O, + [SDL_SCANCODE_P] = KEY_P, + [SDL_SCANCODE_LEFTBRACKET] = KEY_LEFTBRACE, + [SDL_SCANCODE_RIGHTBRACKET] = KEY_RIGHTBRACE, + [SDL_SCANCODE_RETURN] = KEY_ENTER, + [SDL_SCANCODE_LCTRL] = KEY_LEFTCTRL, + [SDL_SCANCODE_A] = KEY_A, + [SDL_SCANCODE_S] = KEY_S, + [SDL_SCANCODE_D] = KEY_D, + [SDL_SCANCODE_F] = KEY_F, + [SDL_SCANCODE_G] = KEY_G, + [SDL_SCANCODE_H] = KEY_H, + [SDL_SCANCODE_J] = KEY_J, + [SDL_SCANCODE_K] = KEY_K, + [SDL_SCANCODE_L] = KEY_L, + [SDL_SCANCODE_SEMICOLON] = KEY_SEMICOLON, + [SDL_SCANCODE_APOSTROPHE] = KEY_APOSTROPHE, + [SDL_SCANCODE_GRAVE] = KEY_GRAVE, + [SDL_SCANCODE_LSHIFT] = KEY_LEFTSHIFT, + [SDL_SCANCODE_BACKSLASH] = KEY_BACKSLASH, + [SDL_SCANCODE_Z] = KEY_Z, + [SDL_SCANCODE_X] = KEY_X, + [SDL_SCANCODE_C] = KEY_C, + [SDL_SCANCODE_V] = KEY_V, + [SDL_SCANCODE_B] = KEY_B, + [SDL_SCANCODE_N] = KEY_N, + [SDL_SCANCODE_M] = KEY_M, + [SDL_SCANCODE_COMMA] = KEY_COMMA, + [SDL_SCANCODE_PERIOD] = KEY_DOT, + [SDL_SCANCODE_SLASH] = KEY_SLASH, + [SDL_SCANCODE_RSHIFT] = KEY_RIGHTSHIFT, + [SDL_SCANCODE_KP_MULTIPLY] = KEY_KPASTERISK, + [SDL_SCANCODE_LALT] = KEY_LEFTALT, + [SDL_SCANCODE_SPACE] = KEY_SPACE, + [SDL_SCANCODE_CAPSLOCK] = KEY_CAPSLOCK, + [SDL_SCANCODE_F1] = KEY_F1, + [SDL_SCANCODE_F2] = KEY_F2, + [SDL_SCANCODE_F3] = KEY_F3, + [SDL_SCANCODE_F4] = KEY_F4, + [SDL_SCANCODE_F5] = KEY_F5, + [SDL_SCANCODE_F6] = KEY_F6, + [SDL_SCANCODE_F7] = KEY_F7, + [SDL_SCANCODE_F8] = KEY_F8, + [SDL_SCANCODE_F9] = KEY_F9, + [SDL_SCANCODE_F10] = KEY_F10, + [SDL_SCANCODE_NUMLOCKCLEAR] = KEY_NUMLOCK, + [SDL_SCANCODE_SCROLLLOCK] = KEY_SCROLLLOCK, + [SDL_SCANCODE_KP_7] = KEY_KP7, + [SDL_SCANCODE_KP_8] = KEY_KP8, + [SDL_SCANCODE_KP_9] = KEY_KP9, + [SDL_SCANCODE_KP_MINUS] = KEY_KPMINUS, + [SDL_SCANCODE_KP_4] = KEY_KP4, + [SDL_SCANCODE_KP_5] = KEY_KP5, + [SDL_SCANCODE_KP_6] = KEY_KP6, + [SDL_SCANCODE_KP_PLUS] = KEY_KPPLUS, + [SDL_SCANCODE_KP_1] = KEY_KP1, + [SDL_SCANCODE_KP_2] = KEY_KP2, + [SDL_SCANCODE_KP_3] = KEY_KP3, + [SDL_SCANCODE_KP_0] = KEY_KP0, + [SDL_SCANCODE_KP_PERIOD] = KEY_KPDOT, + /* key 84 does not exist linux_input.h */ + [SDL_SCANCODE_LANG5] = KEY_ZENKAKUHANKAKU, + [SDL_SCANCODE_NONUSBACKSLASH] = KEY_102ND, + [SDL_SCANCODE_F11] = KEY_F11, + [SDL_SCANCODE_F12] = KEY_F12, + [SDL_SCANCODE_INTERNATIONAL1] = KEY_RO, + [SDL_SCANCODE_LANG3] = KEY_KATAKANA, + [SDL_SCANCODE_LANG4] = KEY_HIRAGANA, + [SDL_SCANCODE_INTERNATIONAL4] = KEY_HENKAN, + [SDL_SCANCODE_INTERNATIONAL2] = KEY_KATAKANAHIRAGANA, + [SDL_SCANCODE_INTERNATIONAL5] = KEY_MUHENKAN, + /* [SDL_SCANCODE_INTERNATIONAL5] -> [KEY_KPJPCOMMA] */ + [SDL_SCANCODE_KP_ENTER] = KEY_KPENTER, + [SDL_SCANCODE_RCTRL] = KEY_RIGHTCTRL, + [SDL_SCANCODE_KP_DIVIDE] = KEY_KPSLASH, + [SDL_SCANCODE_SYSREQ] = KEY_SYSRQ, + [SDL_SCANCODE_RALT] = KEY_RIGHTALT, + /* KEY_LINEFEED */ + [SDL_SCANCODE_HOME] = KEY_HOME, + [SDL_SCANCODE_UP] = KEY_UP, + [SDL_SCANCODE_PAGEUP] = KEY_PAGEUP, + [SDL_SCANCODE_LEFT] = KEY_LEFT, + [SDL_SCANCODE_RIGHT] = KEY_RIGHT, + [SDL_SCANCODE_END] = KEY_END, + [SDL_SCANCODE_DOWN] = KEY_DOWN, + [SDL_SCANCODE_PAGEDOWN] = KEY_PAGEDOWN, + [SDL_SCANCODE_INSERT] = KEY_INSERT, + [SDL_SCANCODE_DELETE] = KEY_DELETE, + /* KEY_MACRO */ + [SDL_SCANCODE_MUTE] = KEY_MUTE, + [SDL_SCANCODE_VOLUMEDOWN] = KEY_VOLUMEDOWN, + [SDL_SCANCODE_VOLUMEUP] = KEY_VOLUMEUP, + [SDL_SCANCODE_POWER] = KEY_POWER, + [SDL_SCANCODE_KP_EQUALS] = KEY_KPEQUAL, + [SDL_SCANCODE_KP_PLUSMINUS] = KEY_KPPLUSMINUS, + [SDL_SCANCODE_PAUSE] = KEY_PAUSE, + /* KEY_SCALE */ + [SDL_SCANCODE_KP_COMMA] = KEY_KPCOMMA, + [SDL_SCANCODE_LANG1] = KEY_HANGUEL, + [SDL_SCANCODE_LANG2] = KEY_HANJA, + [SDL_SCANCODE_INTERNATIONAL3] = KEY_YEN, + [SDL_SCANCODE_LGUI] = KEY_LEFTMETA, + [SDL_SCANCODE_RGUI] = KEY_RIGHTMETA, + [SDL_SCANCODE_APPLICATION] = KEY_COMPOSE, +}; + +int sandbox_sdl_scan_keys(int key[], int max_keys) +{ + const Uint8 *keystate; + int num_keys; + int i, count; + + sandbox_sdl_poll_events(); + keystate = SDL_GetKeyboardState(&num_keys); + for (i = count = 0; i < num_keys; i++) { + if (count < max_keys && keystate[i]) { + int keycode = sdl_to_keycode[i]; + + if (keycode) + key[count++] = keycode; + } + } + + 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) +{ + struct buf_info *buf; + int avail; + bool have_data = false; + int i; + + for (i = 0; i < 2; i++) { + buf = &sdl.buf[sdl.cur_buf]; + avail = buf->size - buf->pos; + if (avail <= 0) { + sdl.cur_buf = 1 - sdl.cur_buf; + continue; + } + if (avail > len) + avail = len; + have_data = true; + + SDL_MixAudio(stream, buf->data + buf->pos, avail, + SDL_MIX_MAXVOLUME); + buf->pos += avail; + len -= avail; + + /* Move to next buffer if we are at the end */ + if (buf->pos == buf->size) + buf->size = 0; + else + break; + } + sdl.stopping = !have_data; +} + +int sandbox_sdl_sound_init(int rate, int channels) +{ + SDL_AudioSpec wanted, have; + int i; + + if (sandbox_sdl_ensure_init()) + return -1; + + if (sdl.audio_active) + return 0; + + /* Set the audio format */ + wanted.freq = rate; + wanted.format = AUDIO_S16; + wanted.channels = channels; + wanted.samples = 1024; /* Good low-latency value for callback */ + wanted.callback = sandbox_sdl_fill_audio; + wanted.userdata = NULL; + + for (i = 0; i < 2; i++) { + struct buf_info *buf = &sdl.buf[i]; + + buf->alloced = sizeof(uint16_t) * wanted.freq * wanted.channels; + buf->data = malloc(buf->alloced); + if (!buf->data) { + printf("%s: Out of memory\n", __func__); + if (i == 1) + free(sdl.buf[0].data); + return -1; + } + buf->pos = 0; + buf->size = 0; + } + + if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) { + printf("Unable to initialise SDL audio: %s\n", SDL_GetError()); + goto err; + } + + /* Open the audio device, forcing the desired format */ + if (SDL_OpenAudio(&wanted, &have) < 0) { + printf("Couldn't open audio: %s\n", SDL_GetError()); + goto err; + } + if (have.format != wanted.format) { + printf("Couldn't select required audio format\n"); + goto err; + } + sdl.audio_active = true; + sdl.sample_rate = wanted.freq; + sdl.cur_buf = 0; + sdl.running = false; + + return 0; + +err: + for (i = 0; i < 2; i++) + free(sdl.buf[i].data); + return -1; +} + +int sandbox_sdl_sound_play(const void *data, uint size) +{ + struct buf_info *buf; + + if (!sdl.audio_active) + return 0; + + buf = &sdl.buf[0]; + if (buf->size) + buf = &sdl.buf[1]; + while (buf->size) + usleep(1000); + + if (size > buf->alloced) + return -E2BIG; + + memcpy(buf->data, data, size); + buf->size = size; + buf->pos = 0; + if (!sdl.running) { + SDL_PauseAudio(0); + sdl.running = true; + sdl.stopping = false; + } + + return 0; +} + +int sandbox_sdl_sound_stop(void) +{ + if (sdl.running) { + while (!sdl.stopping) + SDL_Delay(100); + + SDL_PauseAudio(1); + sdl.running = 0; + sdl.stopping = false; + } + + return 0; +} |