From 53b93ea6a60cf8900c88e00f774693dea9a4f297 Mon Sep 17 00:00:00 2001
From: Solomon Peachy <pizza@shaftnet.org>
Date: Wed, 8 Apr 2020 09:53:13 -0400
Subject: hiby:  Refactor X3ii/X20 and Rocker LCD code

Once some missing power optimization stuff was added to the X3ii code,
they were completely identical.

Change-Id: I68e4db5e270e8ff22f91e521616a054bd7baa95d
---
 firmware/target/hosted/lcd-linuxfb.c | 154 +++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 firmware/target/hosted/lcd-linuxfb.c

(limited to 'firmware/target/hosted/lcd-linuxfb.c')

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();
+    }
+}
-- 
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