mirror of
https://github.com/AsahiLinux/u-boot
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bbc09bf27e
SDL (Simple DirectMedia Layer - see www.libsdl.org) is a library which provides simple graphics and sound features. It works under X11 and also with a simple frame buffer interface. It is ideally suited to sandbox U-Boot since it fits nicely with the low-level feature set required by U-Boot. For example, U-Boot has its own font drawing routines, its own keyboard processing and just needs raw sound output. We can use SDL to provide emulation of these basic functions for sandbox. This significantly expands the testing that is possible with sandbox. Add a basic SDL library which we will use in future commits. Tested-by: Che-Liang Chiou <clchiou@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
341 lines
7.4 KiB
C
341 lines
7.4 KiB
C
/*
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* Copyright (c) 2013 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <errno.h>
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#include <linux/input.h>
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#include <SDL/SDL.h>
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#include <sound.h>
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#include <asm/state.h>
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static struct sdl_info {
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SDL_Surface *screen;
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int width;
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int height;
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int depth;
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int pitch;
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uint frequency;
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uint audio_pos;
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uint audio_size;
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uint8_t *audio_data;
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bool audio_active;
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bool inited;
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} sdl;
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static void sandbox_sdl_poll_events(void)
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{
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/*
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* We don't want to include common.h in this file since it uses
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* system headers. So add a declation here.
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*/
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extern void reset_cpu(unsigned long addr);
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SDL_Event event;
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while (SDL_PollEvent(&event)) {
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switch (event.type) {
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case SDL_QUIT:
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puts("LCD window closed - quitting\n");
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reset_cpu(1);
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break;
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}
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}
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}
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static int sandbox_sdl_ensure_init(void)
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{
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if (!sdl.inited) {
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if (SDL_Init(0) < 0) {
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printf("Unable to initialize SDL: %s\n",
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SDL_GetError());
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return -EIO;
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}
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atexit(SDL_Quit);
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sdl.inited = true;
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}
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return 0;
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}
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int sandbox_sdl_init_display(int width, int height, int log2_bpp)
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{
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struct sandbox_state *state = state_get_current();
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int err;
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if (!width || !state->show_lcd)
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return 0;
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err = sandbox_sdl_ensure_init();
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if (err)
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return err;
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if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) {
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printf("Unable to initialize SDL LCD: %s\n", SDL_GetError());
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return -EPERM;
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}
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SDL_WM_SetCaption("U-Boot", "U-Boot");
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sdl.width = width;
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sdl.height = height;
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sdl.depth = 1 << log2_bpp;
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sdl.pitch = sdl.width * sdl.depth / 8;
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sdl.screen = SDL_SetVideoMode(width, height, 0, 0);
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sandbox_sdl_poll_events();
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return 0;
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}
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int sandbox_sdl_sync(void *lcd_base)
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{
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SDL_Surface *frame;
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frame = SDL_CreateRGBSurfaceFrom(lcd_base, sdl.width, sdl.height,
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sdl.depth, sdl.pitch,
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0x1f << 11, 0x3f << 5, 0x1f << 0, 0);
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SDL_BlitSurface(frame, NULL, sdl.screen, NULL);
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SDL_FreeSurface(frame);
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SDL_UpdateRect(sdl.screen, 0, 0, 0, 0);
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sandbox_sdl_poll_events();
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return 0;
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}
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#define NONE (-1)
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#define NUM_SDL_CODES (SDLK_UNDO + 1)
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static int16_t sdl_to_keycode[NUM_SDL_CODES] = {
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/* 0 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, KEY_BACKSPACE, KEY_TAB,
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NONE, NONE, NONE, KEY_ENTER, NONE,
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NONE, NONE, NONE, NONE, KEY_POWER, /* use PAUSE as POWER */
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/* 20 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, KEY_ESC, NONE, NONE,
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NONE, NONE, KEY_SPACE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 40 */
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NONE, NONE, NONE, NONE, KEY_COMMA,
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KEY_MINUS, KEY_DOT, KEY_SLASH, KEY_0, KEY_1,
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KEY_2, KEY_3, KEY_4, KEY_5, KEY_6,
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KEY_7, KEY_8, KEY_9, NONE, KEY_SEMICOLON,
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/* 60 */
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NONE, KEY_EQUAL, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 80 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, KEY_BACKSLASH, NONE, NONE,
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NONE, KEY_GRAVE, KEY_A, KEY_B, KEY_C,
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/* 100 */
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KEY_D, KEY_E, KEY_F, KEY_G, KEY_H,
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KEY_I, KEY_J, KEY_K, KEY_L, KEY_M,
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KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R,
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KEY_S, KEY_T, KEY_U, KEY_V, KEY_W,
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/* 120 */
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KEY_X, KEY_Y, KEY_Z, NONE, NONE,
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NONE, NONE, KEY_DELETE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 140 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 160 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 180 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 200 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 220 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 240 */
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, NONE, NONE, NONE, NONE,
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NONE, KEY_KP0, KEY_KP1, KEY_KP2, KEY_KP3,
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/* 260 */
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KEY_KP4, KEY_KP5, KEY_KP6, KEY_KP7, KEY_KP8,
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KEY_KP9, KEY_KPDOT, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS,
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KEY_KPPLUS, KEY_KPENTER, KEY_KPEQUAL, KEY_UP, KEY_DOWN,
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KEY_RIGHT, KEY_LEFT, KEY_INSERT, KEY_HOME, KEY_END,
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/* 280 */
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KEY_PAGEUP, KEY_PAGEDOWN, KEY_F1, KEY_F2, KEY_F3,
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KEY_F4, KEY_F5, KEY_F6, KEY_F7, KEY_F8,
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KEY_F9, KEY_F10, KEY_F11, KEY_F12, NONE,
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NONE, NONE, NONE, NONE, NONE,
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/* 300 */
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KEY_NUMLOCK, KEY_CAPSLOCK, KEY_SCROLLLOCK, KEY_RIGHTSHIFT,
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KEY_LEFTSHIFT,
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KEY_RIGHTCTRL, KEY_LEFTCTRL, KEY_RIGHTALT, KEY_LEFTALT, KEY_RIGHTMETA,
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KEY_LEFTMETA, NONE, KEY_FN, NONE, KEY_COMPOSE,
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NONE, KEY_PRINT, KEY_SYSRQ, KEY_PAUSE, NONE,
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/* 320 */
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NONE, NONE, NONE,
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};
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int sandbox_sdl_scan_keys(int key[], int max_keys)
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{
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Uint8 *keystate;
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int i, count;
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sandbox_sdl_poll_events();
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keystate = SDL_GetKeyState(NULL);
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for (i = count = 0; i < NUM_SDL_CODES; i++) {
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if (count >= max_keys)
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break;
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else if (keystate[i])
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key[count++] = sdl_to_keycode[i];
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}
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return count;
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}
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int sandbox_sdl_key_pressed(int keycode)
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{
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int key[8]; /* allow up to 8 keys to be pressed at once */
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int count;
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int i;
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count = sandbox_sdl_scan_keys(key, sizeof(key) / sizeof(key[0]));
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for (i = 0; i < count; i++) {
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if (key[i] == keycode)
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return 0;
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}
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return -ENOENT;
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}
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void sandbox_sdl_fill_audio(void *udata, Uint8 *stream, int len)
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{
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int avail;
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avail = sdl.audio_size - sdl.audio_pos;
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if (avail < len)
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len = avail;
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SDL_MixAudio(stream, sdl.audio_data + sdl.audio_pos, len,
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SDL_MIX_MAXVOLUME);
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sdl.audio_pos += len;
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/* Loop if we are at the end */
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if (sdl.audio_pos == sdl.audio_size)
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sdl.audio_pos = 0;
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}
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int sandbox_sdl_sound_init(void)
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{
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SDL_AudioSpec wanted;
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if (sandbox_sdl_ensure_init())
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return -1;
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if (sdl.audio_active)
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return 0;
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/*
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* At present all sandbox sounds crash. This is probably due to
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* symbol name conflicts with U-Boot. We can remove the malloc()
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* probles with:
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*
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* #define USE_DL_PREFIX
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*
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* and get this:
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*
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* Assertion 'e->pollfd->fd == e->fd' failed at pulse/mainloop.c:676,
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* function dispatch_pollfds(). Aborting.
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*
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* The right solution is probably to make U-Boot's names private or
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* link os.c and sdl.c against their libraries before liking with
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* U-Boot. TBD. For now sound is disabled.
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*/
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printf("(Warning: sandbox sound disabled)\n");
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return 0;
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/* Set the audio format */
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wanted.freq = 22050;
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wanted.format = AUDIO_S16;
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wanted.channels = 1; /* 1 = mono, 2 = stereo */
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wanted.samples = 1024; /* Good low-latency value for callback */
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wanted.callback = sandbox_sdl_fill_audio;
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wanted.userdata = NULL;
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sdl.audio_size = sizeof(uint16_t) * wanted.freq;
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sdl.audio_data = malloc(sdl.audio_size);
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if (!sdl.audio_data) {
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printf("%s: Out of memory\n", __func__);
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return -1;
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}
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sdl.audio_pos = 0;
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if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
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printf("Unable to initialize SDL audio: %s\n", SDL_GetError());
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goto err;
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}
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/* Open the audio device, forcing the desired format */
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if (SDL_OpenAudio(&wanted, NULL) < 0) {
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printf("Couldn't open audio: %s\n", SDL_GetError());
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goto err;
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}
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sdl.audio_active = true;
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return 0;
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err:
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free(sdl.audio_data);
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return -1;
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}
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int sandbox_sdl_sound_start(uint frequency)
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{
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if (!sdl.audio_active)
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return -1;
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sdl.frequency = frequency;
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sound_create_square_wave((unsigned short *)sdl.audio_data,
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sdl.audio_size, frequency);
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sdl.audio_pos = 0;
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SDL_PauseAudio(0);
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return 0;
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}
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int sandbox_sdl_sound_stop(void)
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{
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if (!sdl.audio_active)
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return -1;
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SDL_PauseAudio(1);
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return 0;
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}
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