1 files changed, 161 insertions, 0 deletions

diff --git a/firmware/target/arm/rk27xx/lcdif-rk27xx.c b/firmware/target/arm/rk27xx/lcdif-rk27xx.c
new file mode 100644
index 0000000000..aeee63ee7e
--- /dev/null
+++ b/firmware/target/arm/rk27xx/lcdif-rk27xx.c
@@ -0,0 +1,161 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2011 Marcin Bukat
+ *
+ * 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 "config.h"
+#include "kernel.h"
+#include "lcd.h"
+#include "system.h"
+#include "cpu.h"
+#include "lcdif-rk27xx.h"
+
+
+unsigned int lcd_data_transform(unsigned int data)
+{
+    unsigned int r, g, b;
+
+#if defined(RK27_GENERIC)
+    /* 18 bit interface */
+    r = (data & 0x0000fc00)<<8;
+    /* g = ((data & 0x00000300) >> 2) | ((data & 0x000000e0) >> 3); */
+    g = ((data & 0x00000300) << 6) | ((data & 0x000000e0) << 5);
+    b = (data & 0x00000001f) << 3;
+#elif defined(HM60X)
+    /* 16 bit interface */
+    r = (data & 0x0000f800) << 8;
+    g = (data & 0x000007e0) << 5;
+    b = (data & 0x0000001f) << 3;
+#else
+#error "Unknown target"
+#endif
+
+    return (r | g | b);
+}
+
+void lcd_cmd(unsigned int cmd)
+{
+    LCD_COMMAND = lcd_data_transform(cmd);
+}
+
+void lcd_data(unsigned int data)
+{
+    LCD_DATA = lcd_data_transform(data);
+}
+
+void lcd_write_reg(unsigned int reg, unsigned int val)
+{
+    lcd_cmd(reg);
+    lcd_data(val);
+}
+
+static void lcdctrl_bypass(unsigned int on_off)
+{
+    while (!(LCDC_STA & LCDC_MCU_IDLE));
+
+    if (on_off)
+        MCU_CTRL |= MCU_CTRL_BYPASS;
+    else
+        MCU_CTRL &= ~MCU_CTRL_BYPASS;
+}
+
+/* This part is unclear. I am unable to use buffered/FIFO based writes
+ * to lcd. Depending on settings of IF I get various patterns on display
+ * but not what I want to display apparently.
+ */
+static void lcdctrl_init(void)
+{
+    /* alpha b111
+     * stop at current frame complete
+     * MCU mode
+     * 24b RGB
+     */
+    LCDC_CTRL = ALPHA(7) | LCDC_STOP | LCDC_MCU | RGB24B;
+    MCU_CTRL = ALPHA_BASE(0x3f) | MCU_CTRL_BYPASS;
+
+    HOR_ACT = LCD_WIDTH + 3;    /* define horizonatal active region */
+    VERT_ACT = LCD_HEIGHT;       /* define vertical active region */
+    VERT_PERIOD = 0xfff;  /* CSn/WEn/RDn signal timings */
+
+    LINE0_YADDR = LINE_ALPHA_EN | 0x7fe;
+    LINE1_YADDR = LINE_ALPHA_EN | ((1 * LCD_WIDTH) - 2);
+    LINE2_YADDR = LINE_ALPHA_EN | ((2 * LCD_WIDTH) - 2);
+    LINE3_YADDR = LINE_ALPHA_EN | ((3 * LCD_WIDTH) - 2);
+
+    LINE0_UVADDR = 0x7fe + 1;
+    LINE1_UVADDR = ((1 * LCD_WIDTH) - 2 + 1);
+    LINE2_UVADDR = ((2 * LCD_WIDTH) - 2 + 1);
+    LINE3_UVADDR = ((3 * LCD_WIDTH) - 2 + 1);
+
+#if 0
+    LINE0_YADDR = 0;
+    LINE1_YADDR = (1 * LCD_WIDTH);
+    LINE2_YADDR = (2 * LCD_WIDTH);
+    LINE3_YADDR = (3 * LCD_WIDTH);
+
+    LINE0_UVADDR = 1;
+    LINE1_UVADDR = (1 * LCD_WIDTH) + 1;
+    LINE2_UVADDR = (2 * LCD_WIDTH) + 1;
+    LINE3_UVADDR = (3 * LCD_WIDTH) + 1;
+
+    START_X = 0;
+    START_Y = 0;
+    DELTA_X = 0x200; /* no scaling */
+    DELTA_Y = 0x200; /* no scaling */
+#endif
+    LCDC_INTR_MASK = INTR_MASK_LINE; /* INTR_MASK_EVENLINE; */
+}
+
+/* configure pins to drive lcd in 18bit mode */
+static void iomux_lcd(void)
+{
+    unsigned long muxa;
+
+    muxa = SCU_IOMUXA_CON & ~(IOMUX_LCD_VSYNC|IOMUX_LCD_DEN|0xff);
+    muxa |= IOMUX_LCD_D18|IOMUX_LCD_D20|IOMUX_LCD_D22|IOMUX_LCD_D17|IOMUX_LCD_D16;
+
+    SCU_IOMUXA_CON = muxa;
+    SCU_IOMUXB_CON |= IOMUX_LCD_D815;
+}
+
+void lcd_init_device()
+{
+    iomux_lcd();       /* setup pins for 16bit lcd interface */
+    lcdctrl_init();    /* basic lcdc module configuration */
+
+    lcdctrl_bypass(1); /* run in bypass mode - all writes goes directly to lcd controller */
+    lcd_display_init();
+}
+
+/* This is ugly hack. We drive lcd in bypass mode
+ * where all writes goes directly to lcd controller.
+ * This is suboptimal at best. IF module povides
+ * FIFO, internal sram buffer, hardware scaller,
+ * DMA signals, hardware alpha blending and more.
+ * BUT the fact is that I have no idea how to use
+ * this modes. Datasheet floating around is very
+ * unclean in this regard and OF uses ackward
+ * lcd update routines which are hard to understand.
+ * Moreover OF sets some bits in IF module registers
+ * which are referred as reseved in datasheet.
+ */
+void lcd_update()
+{
+    lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
+}