169 lines
4.3 KiB
C
169 lines
4.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2017 Marcin Bukat
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* Copyright (C) 2016 Amaury Pouly
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* Copyright (C) 2019 Roman Stolyarov
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <linux/fb.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include "lcd.h"
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#include "lcd-target.h"
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#include "backlight-target.h"
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#include "sysfs.h"
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#include "panic.h"
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static int fd = -1;
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static struct fb_var_screeninfo vinfo;
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static struct fb_fix_screeninfo finfo;
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fb_data *framebuffer = NULL; /* global variable, see lcd-target.h */
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static void redraw(void)
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{
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ioctl(fd, FBIOPAN_DISPLAY, &vinfo);
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}
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void lcd_init_device(void)
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{
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const char * const fb_dev = "/dev/fb0";
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fd = open(fb_dev, O_RDWR | O_CLOEXEC);
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if(fd < 0)
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{
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panicf("Cannot open framebuffer: %s\n", fb_dev);
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}
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/* get fixed and variable information */
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if(ioctl(fd, FBIOGET_FSCREENINFO, &finfo) < 0)
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{
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panicf("Cannot read framebuffer fixed information");
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}
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#if 0
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/* check resolution and framebuffer size */
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if(vinfo.xres != LCD_WIDTH || vinfo.yres != LCD_HEIGHT || vinfo.bits_per_pixel != LCD_DEPTH)
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{
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panicf("Unexpected framebuffer resolution: %dx%dx%d\n", vinfo.xres,
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vinfo.yres, vinfo.bits_per_pixel);
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}
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#endif
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/* Note: we use a framebuffer size of width*height*bbp. We cannot trust the
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* values returned by the driver for line_length */
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/* map framebuffer */
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framebuffer = mmap(NULL, FRAMEBUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if((void *)framebuffer == MAP_FAILED)
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{
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panicf("Cannot map framebuffer");
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}
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if(ioctl(fd, FBIOGET_VSCREENINFO, &vinfo) < 0)
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{
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panicf("Cannot read framebuffer variable information");
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}
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memset(framebuffer, 0, finfo.smem_len);
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#ifdef HAVE_LCD_ENABLE
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lcd_set_active(true);
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#endif
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}
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#ifdef HAVE_LCD_SHUTDOWN
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void lcd_shutdown(void)
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{
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munmap(framebuffer, FRAMEBUFFER_SIZE);
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framebuffer = NULL;
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close(fd);
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fd = -1;
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}
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#endif
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#ifdef HAVE_LCD_ENABLE
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void lcd_enable(bool on)
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{
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if (fd < 0) return;
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if (lcd_active() == on)
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return;
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lcd_set_active(on);
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if (on)
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{
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send_event(LCD_EVENT_ACTIVATION, NULL);
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ioctl(fd, FB_BLANK_UNBLANK);
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}
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else
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{
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memset(framebuffer, 0, finfo.smem_len);
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redraw();
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ioctl(fd, FB_BLANK_POWERDOWN);
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}
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}
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#endif
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extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
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int width, int height);
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void lcd_update(void)
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{
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if (fd < 0) return;
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#ifdef HAVE_LCD_ENABLE
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if (lcd_active())
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#endif
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{
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/* Copy the Rockbox framebuffer to the second framebuffer */
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lcd_copy_buffer_rect(LCD_FRAMEBUF_ADDR(0, 0), FBADDR(0,0),
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LCD_WIDTH*LCD_HEIGHT, 1);
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redraw();
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}
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}
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void lcd_update_rect(int x, int y, int width, int height)
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{
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if (fd < 0) return;
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#ifdef HAVE_LCD_ENABLE
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if (lcd_active())
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#endif
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{
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fb_data *dst = LCD_FRAMEBUF_ADDR(x, y);
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fb_data * src = FBADDR(x,y);
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/* Copy part of the Rockbox framebuffer to the second framebuffer */
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if (width < LCD_WIDTH)
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{
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/* Not full width - do line-by-line */
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lcd_copy_buffer_rect(dst, src, width, height);
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}
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else
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{
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/* Full width - copy as one line */
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lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
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}
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redraw();
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}
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}
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