1 files changed, 375 insertions, 0 deletions

diff --git a/firmware/target/arm/samsung/yh820/lcd-yh820.c b/firmware/target/arm/samsung/yh820/lcd-yh820.c
new file mode 100644
index 0000000000..d21f6c2854
--- /dev/null
+++ b/firmware/target/arm/samsung/yh820/lcd-yh820.c
@@ -0,0 +1,375 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Mark Arigo
+ *
+ * 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 "cpu.h"
+#include "lcd.h"
+#include "kernel.h"
+#include "system.h"
+
+/* Display status */
+static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
+
+#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
+static bool is_lcd_enabled = true;
+#endif
+
+/* NOTE: the LCD is rotated 90 degrees */
+
+/* LCD command set for Samsung S6B33B2 */
+
+#define R_NOP                  0x00
+#define R_OSCILLATION_MODE     0x02
+#define R_DRIVER_OUTPUT_MODE   0x10
+#define R_DCDC_SET             0x20
+#define R_BIAS_SET             0x22
+#define R_DCDC_CLOCK_DIV       0x24
+#define R_DCDC_AMP_ONOFF       0x26
+#define R_TEMP_COMPENSATION    0x28
+#define R_CONTRAST_CONTROL1    0x2a
+#define R_CONTRAST_CONTROL2    0x2b
+#define R_STANDBY_OFF          0x2c
+#define R_STANDBY_ON           0x2d
+#define R_DDRAM_BURST_OFF      0x2e
+#define R_DDRAM_BURST_ON       0x2f
+#define R_ADDRESSING_MODE      0x30
+#define R_ROW_VECTOR_MODE      0x32
+#define R_N_LINE_INVERSION     0x34
+#define R_FRAME_FREQ_CONTROL   0x36
+#define R_RED_PALETTE          0x38
+#define R_GREEN_PALETTE        0x3a
+#define R_BLUE_PALETTE         0x3c
+#define R_ENTRY_MODE           0x40
+#define R_X_ADDR_AREA          0x42
+#define R_Y_ADDR_AREA          0x43
+#define R_RAM_SKIP_AREA        0x45
+#define R_DISPLAY_OFF          0x50
+#define R_DISPLAY_ON           0x51
+#define R_SPEC_DISPLAY_PATTERN 0x53
+#define R_PARTIAL_DISPLAY_MODE 0x55
+#define R_PARTIAL_START_LINE   0x56
+#define R_PARTIAL_END_LINE     0x57
+#define R_AREA_SCROLL_MODE     0x59
+#define R_SCROLL_START_LINE    0x5a
+#define R_DATA_FORMAT_SELECT   0x60
+
+
+/* wait for LCD */
+static inline void lcd_wait_write(void)
+{
+    while (LCD1_CONTROL & LCD1_BUSY_MASK);
+}
+
+/* send LCD data */
+static void lcd_send_data(unsigned data)
+{
+    lcd_wait_write();
+    LCD1_DATA = data >> 8;
+    lcd_wait_write();
+    LCD1_DATA = data & 0xff;
+}
+
+/* send LCD command */
+static void lcd_send_command(unsigned cmd)
+{
+    lcd_wait_write();
+    LCD1_CMD = cmd;
+}
+
+/* LCD init */
+void lcd_init_device(void)
+{
+#if 0
+    /* This is the init sequence from the yh820 OF bootloader */
+    unsigned long tmp;
+
+    DEV_INIT1 &= ~0x3000;
+    tmp = DEV_INIT1;
+    DEV_INIT1 = tmp;
+    DEV_INIT2 &= ~0x400;
+    
+    LCD1_CONTROL &= ~0x4;
+    udelay(15);
+    LCD1_CONTROL |= 0x4;
+
+    LCD1_CONTROL = 0x680;
+    LCD1_CONTROL = 0x684;
+
+    LCD1_CONTROL |= 0x1;
+    udelay(200);
+
+    lcd_send_command(R_STANDBY_OFF);
+    udelay(100000);
+
+    lcd_send_command(R_DISPLAY_OFF);
+    udelay(10000);
+
+    lcd_send_command(R_OSCILLATION_MODE);
+    lcd_send_command(0x01);
+    udelay(30000);
+
+    lcd_send_command(R_DCDC_SET);
+    lcd_send_command(0x01);
+    udelay(30000);
+
+    lcd_send_command(R_DCDC_AMP_ONOFF);
+    lcd_send_command(0x01);
+    udelay(30000);
+
+    lcd_send_command(R_DCDC_AMP_ONOFF);
+    lcd_send_command(0x09);
+    udelay(30000);
+
+    lcd_send_command(R_DCDC_AMP_ONOFF);
+    lcd_send_command(0x0b);
+    udelay(30000);
+
+    lcd_send_command(R_DCDC_AMP_ONOFF);
+    lcd_send_command(0x0f);
+    udelay(30000);
+
+    lcd_send_command(R_DCDC_CLOCK_DIV);
+    lcd_send_command(0x03);
+    udelay(10000);
+
+    lcd_send_command(R_CONTRAST_CONTROL1);
+    lcd_send_command(0x89);
+    udelay(10000);
+
+    lcd_send_command(R_TEMP_COMPENSATION);
+    lcd_send_command(0x01);
+    udelay(10000);
+
+    lcd_send_command(R_ADDRESSING_MODE);
+    lcd_send_command(0x19);
+    udelay(10000);
+
+    lcd_send_command(R_ROW_VECTOR_MODE);
+    lcd_send_command(0x00);
+    udelay(10000);
+
+    lcd_send_command(R_N_LINE_INVERSION);
+    lcd_send_command(0x8b);
+    udelay(10000);
+
+    lcd_send_command(R_ENTRY_MODE);
+    lcd_send_command(0x01);
+
+    lcd_send_command(R_DRIVER_OUTPUT_MODE);
+    lcd_send_command(0x34);
+    udelay(10000);
+
+    lcd_send_command(R_X_ADDR_AREA);         /* vertical dimensions */
+    lcd_send_command(0x00);                  /* y1 */
+    lcd_send_command(LCD_HEIGHT - 1);        /* y2 */
+    
+    lcd_send_command(R_Y_ADDR_AREA);         /* horizontal dimensions */
+    lcd_send_command(0x04);                  /* x1 + 4 */
+    lcd_send_command(LCD_WIDTH - 1 + 4);     /* x2 + 4 */
+    udelay(100);
+
+    lcd_send_command(R_BIAS_SET);
+    lcd_send_command(0x01);
+
+    lcd_send_command(R_DDRAM_BURST_OFF);
+    udelay(100);
+
+    lcd_send_command(R_DISPLAY_ON);
+    udelay(30000);
+#endif
+}
+
+/*** hardware configuration ***/
+int lcd_default_contrast(void)
+{
+    return DEFAULT_CONTRAST_SETTING;
+}
+
+void lcd_set_contrast(int val)
+{
+    lcd_send_command(R_CONTRAST_CONTROL1);
+    lcd_send_command(val);
+}
+
+void lcd_set_invert_display(bool yesno)
+{
+    /* TODO: Implement lcd_set_invert_display() */
+    (void)yesno;
+}
+
+#if defined(HAVE_LCD_ENABLE)
+void lcd_enable(bool yesno)
+{
+    if (yesno == is_lcd_enabled)
+        return;
+
+    if ((is_lcd_enabled = yesno))
+    {
+        lcd_send_command(R_STANDBY_OFF);
+        lcd_send_command(R_DISPLAY_ON);
+        lcd_activation_call_hook();
+    }
+    else
+    {
+        lcd_send_command(R_STANDBY_ON);
+    }
+}
+#endif
+
+#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
+bool lcd_active(void)
+{
+    return is_lcd_enabled;
+}
+#endif
+
+#ifdef HAVE_LCD_FLIP
+/* turn the display upside down (call lcd_update() afterwards) */
+/* Note: since the lcd is rotated, this will flip horiz instead of vert */
+void lcd_set_flip(bool yesno)
+{
+    lcd_send_command(R_DRIVER_OUTPUT_MODE);
+    lcd_send_command(yesno ? 0x30 : 0x34);
+}
+#endif
+
+
+/*** update functions ***/
+
+void lcd_yuv_set_options(unsigned options)
+{
+    lcd_yuv_options = options;
+}
+
+/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
+extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
+                                   int width,
+                                   int stride);
+extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
+                                           int width,
+                                           int stride,
+                                           int x_screen, /* To align dither pattern */
+                                           int y_screen);
+/* Performance function to blit a YUV bitmap directly to the LCD */
+void lcd_blit_yuv(unsigned char * const src[3],
+                  int src_x, int src_y, int stride,
+                  int x, int y, int width, int height)
+{
+    unsigned char const * yuv_src[3];
+    off_t z;
+
+    /* Sorry, but width and height must be >= 2 or else */
+    width &= ~1;
+    height >>= 1;
+    
+    z = stride*src_y;
+    yuv_src[0] = src[0] + z + src_x;
+    yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
+    yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
+
+    lcd_send_command(R_ENTRY_MODE);
+    lcd_send_command(0x03);
+
+    lcd_send_command(R_Y_ADDR_AREA);
+    lcd_send_command(x + 4);
+    lcd_send_command(x + width - 1 + 4);
+
+    if (lcd_yuv_options & LCD_YUV_DITHER)
+    {
+        do
+        {
+            lcd_send_command(R_X_ADDR_AREA);
+            lcd_send_command(y);
+            lcd_send_command(y + 1);
+
+            lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
+            yuv_src[0] += stride << 1; /* Skip down two luma lines */
+            yuv_src[1] += stride >> 1; /* Skip down one chroma line */
+            yuv_src[2] += stride >> 1;
+            y += 2;
+        }
+         while (--height > 0);
+    }
+    else
+    {
+        do
+        {
+            lcd_send_command(R_X_ADDR_AREA);
+            lcd_send_command(y);
+            lcd_send_command(y + 1);
+
+            lcd_write_yuv420_lines(yuv_src, width, stride);
+            yuv_src[0] += stride << 1; /* Skip down two luma lines */
+            yuv_src[1] += stride >> 1; /* Skip down one chroma line */
+            yuv_src[2] += stride >> 1;
+            y += 2;
+        }
+         while (--height > 0);
+    }
+}
+
+/* Update the display.
+   This must be called after all other LCD functions that change the display. */
+void lcd_update(void)
+{
+    lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
+}
+
+/* Update a fraction of the display. */
+void lcd_update_rect(int x, int y, int width, int height)
+{
+    const fb_data *addr;
+    
+    if (x + width >= LCD_WIDTH)
+        width = LCD_WIDTH - x;
+    if (y + height >= LCD_HEIGHT)
+        height = LCD_HEIGHT - y;
+        
+    if ((width <= 0) || (height <= 0))
+        return; /* Nothing left to do. */
+
+    addr = &lcd_framebuffer[y][x];
+
+    if (width <= 1) {                    
+        lcd_send_command(R_ENTRY_MODE);  /* The X end address must be larger */
+        lcd_send_command(0x03);          /* that the X start address, so we */
+        lcd_send_command(R_Y_ADDR_AREA); /* switch to vertical mode for */
+        lcd_send_command(x + 4);         /* single column updates and set */
+        lcd_send_command(x + 1 + 4);     /* the window width to 2 */
+    } else {
+        lcd_send_command(R_ENTRY_MODE);
+        lcd_send_command(0x01);
+        lcd_send_command(R_Y_ADDR_AREA);
+        lcd_send_command(x + 4);
+        lcd_send_command(x + width - 1 + 4);
+    }
+
+    lcd_send_command(R_X_ADDR_AREA);
+    lcd_send_command(y);
+    lcd_send_command(y + height - 1);
+
+    do {
+        int w = width;
+        do {
+            lcd_send_data(*addr++);
+        } while (--w > 0);
+        addr += LCD_WIDTH - width;
+    } while (--height > 0);
+}