summaryrefslogtreecommitdiffstats
path: root/firmware/target/hosted/lcd-linuxfb.c
diff options
context:
space:
mode:
Diffstat (limited to 'firmware/target/hosted/lcd-linuxfb.c')
-rw-r--r--firmware/target/hosted/lcd-linuxfb.c154
1 files changed, 154 insertions, 0 deletions
diff --git a/firmware/target/hosted/lcd-linuxfb.c b/firmware/target/hosted/lcd-linuxfb.c
new file mode 100644
index 0000000000..6a3aa36b5d
--- /dev/null
+++ b/firmware/target/hosted/lcd-linuxfb.c
@@ -0,0 +1,154 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ *
+ * Copyright (C) 2017 Marcin Bukat
+ * Copyright (C) 2016 Amaury Pouly
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <linux/fb.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include "lcd.h"
+#include "lcd-target.h"
+#include "backlight-target.h"
+#include "sysfs.h"
+#include "panic.h"
+
+static int fd = -1;
+static struct fb_var_screeninfo vinfo;
+fb_data *framebuffer = 0; /* global variable, see lcd-target.h */
+
+void lcd_init_device(void)
+{
+ const char * const fb_dev = "/dev/fb0";
+ fd = open(fb_dev, O_RDWR);
+ if(fd < 0)
+ {
+ panicf("Cannot open framebuffer: %s\n", fb_dev);
+ }
+
+ /* get fixed and variable information */
+ struct fb_fix_screeninfo finfo;
+ if(ioctl(fd, FBIOGET_FSCREENINFO, &finfo) < 0)
+ {
+ panicf("Cannot read framebuffer fixed information");
+ }
+
+ if(ioctl(fd, FBIOGET_VSCREENINFO, &vinfo) < 0)
+ {
+ panicf("Cannot read framebuffer variable information");
+ }
+
+#if 0
+ /* check resolution and framebuffer size */
+ if(vinfo.xres != LCD_WIDTH || vinfo.yres != LCD_HEIGHT || vinfo.bits_per_pixel != LCD_DEPTH)
+ {
+ panicf("Unexpected framebuffer resolution: %dx%dx%d\n", vinfo.xres,
+ vinfo.yres, vinfo.bits_per_pixel);
+ }
+#endif
+ /* Note: we use a framebuffer size of width*height*bbp. We cannot trust the
+ * values returned by the driver for line_length */
+
+ /* map framebuffer */
+ framebuffer = mmap(0, FRAMEBUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if((void *)framebuffer == MAP_FAILED)
+ {
+ panicf("Cannot map framebuffer");
+ }
+
+#ifdef HAVE_LCD_ENABLE
+ lcd_set_active(true);
+#endif
+}
+
+#ifdef HAVE_LCD_SHUTDOWN
+void lcd_shutdown(void)
+{
+ munmap(framebuffer, FRAMEBUFFER_SIZE);
+ close(fd);
+}
+#endif
+
+void lcd_enable(bool on)
+{
+ const char * const sysfs_fb_blank = "/sys/class/graphics/fb0/blank";
+
+#ifdef HAVE_LCD_SLEEP
+ if (lcd_active() != on)
+#endif
+ {
+ sysfs_set_int(sysfs_fb_blank, on ? 0 : 1);
+#ifdef HAVE_LCD_ENABLE
+ lcd_set_active(on);
+#endif
+
+ if (on)
+ {
+ send_event(LCD_EVENT_ACTIVATION, NULL);
+ }
+ }
+}
+
+static void redraw(void)
+{
+ ioctl(fd, FBIOPAN_DISPLAY, &vinfo);
+}
+
+extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
+ int width, int height);
+
+void lcd_update(void)
+{
+#ifdef HAVE_LCD_SLEEP
+ if (lcd_active() != on)
+#endif
+ {
+ /* Copy the Rockbox framebuffer to the second framebuffer */
+ lcd_copy_buffer_rect(LCD_FRAMEBUF_ADDR(0, 0), FBADDR(0,0),
+ LCD_WIDTH*LCD_HEIGHT, 1);
+ redraw();
+ }
+}
+
+void lcd_update_rect(int x, int y, int width, int height)
+{
+#ifdef HAVE_LCD_SLEEP
+ if (lcd_active() != on)
+#endif
+ {
+ fb_data *dst = LCD_FRAMEBUF_ADDR(x, y);
+ fb_data * src = FBADDR(x,y);
+
+ /* Copy part of the Rockbox framebuffer to the second framebuffer */
+ if (width < LCD_WIDTH)
+ {
+ /* Not full width - do line-by-line */
+ lcd_copy_buffer_rect(dst, src, width, height);
+ }
+ else
+ {
+ /* Full width - copy as one line */
+ lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
+ }
+ redraw();
+ }
+}