1 files changed, 294 insertions, 0 deletions

diff --git a/firmware/target/arm/samsung/yh920/lcd-yh920.c b/firmware/target/arm/samsung/yh920/lcd-yh920.c
new file mode 100644
index 0000000000..6c1528b630
--- /dev/null
+++ b/firmware/target/arm/samsung/yh920/lcd-yh920.c
@@ -0,0 +1,294 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2004 by Linus Nielsen Feltzing
+ *
+ * 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 "system.h"
+#include "kernel.h"
+#include "lcd.h"
+
+/*** definitions ***/
+
+/* LCD command codes */
+#define LCD_CNTL_POWER_CONTROL          0x25
+#define LCD_CNTL_VOLTAGE_SELECT         0x2b
+#define LCD_CNTL_LINE_INVERT_DRIVE      0x36
+#define LCD_CNTL_GRAY_SCALE_PATTERN     0x39
+#define LCD_CNTL_TEMP_GRADIENT_SELECT   0x4e
+#define LCD_CNTL_OSC_FREQUENCY          0x5f
+#define LCD_CNTL_ON_OFF                 0xae
+#define LCD_CNTL_OSC_ON_OFF             0xaa
+#define LCD_CNTL_OFF_MODE               0xbe
+#define LCD_CNTL_REVERSE                0xa6
+#define LCD_CNTL_ALL_LIGHTING           0xa4
+#define LCD_CNTL_COMMON_OUTPUT_STATUS   0xc4
+#define LCD_CNTL_COLUMN_ADDRESS_DIR     0xa0
+#define LCD_CNTL_NLINE_ON_OFF           0xe4
+#define LCD_CNTL_DISPLAY_MODE           0x66
+#define LCD_CNTL_DUTY_SET               0x6d
+#define LCD_CNTL_ELECTRONIC_VOLUME      0x81
+#define LCD_CNTL_DATA_INPUT_DIR         0x84
+#define LCD_CNTL_DISPLAY_START_LINE     0x8a
+#define LCD_CNTL_AREA_SCROLL            0x10
+
+#define LCD_CNTL_PAGE                   0xb1
+#define LCD_CNTL_COLUMN                 0x13
+#define LCD_CNTL_DATA_WRITE             0x1d
+
+/* lcd commands */
+static void lcd_send_data(unsigned byte)
+{
+    while (LCD1_CONTROL & LCD1_BUSY_MASK); /* wait for LCD */
+    LCD1_DATA = byte;
+}
+
+static void lcd_send_cmd(unsigned byte)
+{
+    while (LCD1_CONTROL & LCD1_BUSY_MASK); /* wait for LCD */
+    LCD1_CMD = byte;
+}
+
+static void lcd_write_reg(unsigned cmd, unsigned data)
+{
+    lcd_send_cmd(cmd);
+    lcd_send_data(data);
+}
+
+static void lcd_write_reg_ex(unsigned cmd, unsigned data0, unsigned data1)
+{
+    lcd_send_cmd(cmd);
+    lcd_send_data(data0);
+    lcd_send_data(data1);
+}
+
+/*** hardware configuration ***/
+int lcd_default_contrast(void)
+{
+    return DEFAULT_CONTRAST_SETTING;
+}
+
+void lcd_set_contrast(int val)
+{
+    /* Keep val in acceptable hw range */
+    if (val < 0)
+        val = 0;
+    else if (val > 127)
+        val = 127;
+
+    lcd_write_reg_ex(LCD_CNTL_ELECTRONIC_VOLUME, val, -1);
+}
+
+void lcd_set_invert_display(bool yesno)
+{
+    lcd_send_cmd(LCD_CNTL_REVERSE | (yesno?1:0));
+}
+
+/* turn the display upside down (call lcd_update() afterwards) */
+void lcd_set_flip(bool yesno)
+{
+    if (yesno) 
+    {
+        lcd_send_cmd(LCD_CNTL_COLUMN_ADDRESS_DIR | 1);
+        lcd_send_cmd(LCD_CNTL_COMMON_OUTPUT_STATUS | 0);
+        lcd_write_reg_ex(LCD_CNTL_DUTY_SET, 0x20, 0);
+    }
+    else
+    {
+        lcd_send_cmd(LCD_CNTL_COLUMN_ADDRESS_DIR | 0);
+        lcd_send_cmd(LCD_CNTL_COMMON_OUTPUT_STATUS | 1);
+        lcd_write_reg_ex(LCD_CNTL_DUTY_SET, 0x20, 1);
+    }
+}
+
+void lcd_init_device(void)
+{
+#if 0
+    /* This is the init sequence from the yh820 OF bootloader */
+    unsigned long tmp;
+
+    DEV_INIT2 |= 0x400;
+
+    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;
+
+    lcd_send_cmd(LCD_CNTL_RESET);
+    lcd_send_cmd(LCD_CNTL_DISCHARGE_ON_OFF | 0);
+    lcd_send_cmd(LCD_CNTL_ON_OFF | 0); /* LCD OFF */
+    lcd_send_cmd(LCD_CNTL_COLUMN_ADDRESS_DIR | 0);   /* Normal */
+    lcd_send_cmd(LCD_CNTL_COMMON_OUTPUT_STATUS | 0); /* Normal */
+    lcd_send_cmd(LCD_CNTL_REVERSE | 0); /* Reverse OFF */
+    lcd_send_cmd(LCD_CNTL_ALL_LIGHTING | 0); /* Normal */
+    lcd_write_reg_ex(LCD_CNTL_DUTY_SET, 0x1f, 0x00);
+    lcd_send_cmd(LCD_CNTL_OFF_MODE | 1); /* OFF -> VCC on drivers */
+    lcd_write_reg(LCD_CNTL_VOLTAGE_SELECT, 0x03);
+    lcd_write_reg(LCD_CNTL_ELECTRONIC_VOLUME, 0x40);
+    lcd_write_reg(LCD_CNTL_TEMP_GRADIENT_SELECT, 0x00);
+    lcd_write_reg(LCD_CNTL_LINE_INVERT_DRIVE, 0x1f);
+    lcd_send_cmd(LCD_CNTL_NLINE_ON_OFF | 1); /* N-line ON */
+    lcd_write_reg(LCD_CNTL_OSC_FREQUENCY, 0x00);
+    lcd_send_cmd(LCD_CNTL_OSC_ON_OFF | 1); /* Oscillator ON */
+    lcd_write_reg(LCD_CNTL_STEPUP_CK_FREQ, 0x03);
+    lcd_write_reg(LCD_CNTL_POWER_CONTROL, 0x1c);
+    lcd_write_reg(LCD_CNTL_POWER_CONTROL, 0x1e);
+    lcd_write_reg(LCD_CNTL_DISPLAY_START_LINE, 0x00);
+    lcd_send_cmd(LCD_CNTL_DATA_INPUT_DIR | 0); /* Column mode */
+    lcd_send_cmd(LCD_CNTL_DISPLAY_MODE, 0); /* Greyscale mode */
+    lcd_write_reg(LCD_CNTL_GRAY_SCALE_PATTERN, 0x52);
+    lcd_send_cmd(LCD_CNTL_PARTIAL_DISPLAY_ON_OFF | 0);
+    lcd_write_reg(LCD_CNTL_POWER_CONTROL, 0x1f);
+    lcd_send_cmd(LCD_CNTL_ON_OFF | 1); /* LCD ON */
+#endif
+}
+
+/*** update functions ***/
+
+/* Performance function that works with an external buffer
+   note that by and bheight are in 8-pixel units! */
+void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
+                   int bheight, int stride)
+{
+    (void)data;
+    (void)x;
+    (void)by;
+    (void)width;
+    (void)bheight;
+    (void)stride;
+
+#if 0
+    /* This is from the h100 lcd code, perhaps we can adapt */
+    const unsigned char *src, *src_end;
+    unsigned char *dst_u, *dst_l;
+    static unsigned char upper[LCD_WIDTH] IBSS_ATTR;
+    static unsigned char lower[LCD_WIDTH] IBSS_ATTR;
+    unsigned int byte;
+
+    by *= 2;
+
+    while (bheight--)
+    {
+        src = data;
+        src_end = data + width;
+        dst_u = upper;
+        dst_l = lower;
+        do
+        {
+            byte = *src++;
+            *dst_u++ = lcd_dibits[byte & 0x0F];
+            byte >>= 4;
+            *dst_l++ = lcd_dibits[byte & 0x0F];
+        }
+        while (src < src_end);
+
+        lcd_write_reg_ex(LCD_CNTL_PAGE, by++, -1);
+        lcd_write_reg_ex(LCD_CNTL_COLUMN, x, -1);
+        lcd_send_cmd(LCD_CNTL_DATA_WRITE);
+        lcd_write_data(upper, width);
+
+        lcd_write_reg_ex(LCD_CNTL_PAGE, by++, -1);
+        lcd_write_reg_ex(LCD_CNTL_COLUMN, x, -1);
+        lcd_send_cmd(LCD_CNTL_DATA_WRITE);
+        lcd_write_data(lower, width);
+
+        data += stride;
+    }
+#endif
+}
+
+/* Helper function for lcd_grey_phase_blit(). */
+/* void lcd_grey_data(unsigned char *values, unsigned char *phases, int count); */
+
+/* Performance function that works with an external buffer
+   note that by and bheight are in 4-pixel units! */
+void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
+                         int x, int by, int width, int bheight, int stride)
+{
+    (void)values;
+    (void)phases;
+    (void)x;
+    (void)by;
+    (void)width;
+    (void)bheight;
+    (void)stride;
+
+#if 0
+    /* This is from the h100 lcd code, perhaps we can adapt */
+    stride <<= 2; /* 4 pixels per block */
+    while (bheight--)
+    {
+        lcd_write_reg_ex(LCD_CNTL_PAGE, by++, -1);
+        lcd_write_reg_ex(LCD_CNTL_COLUMN, x, -1);
+        lcd_send_cmd(LCD_CNTL_DATA_WRITE);
+        lcd_grey_data(values, phases, width);
+        values += stride;
+        phases += stride;
+    }
+#endif
+}
+
+/* Update a fraction of the display. */
+/* void lcd_update_rect(int, int, int, int) ICODE_ATTR; */
+void lcd_update_rect(int x0, int y, int width, int height)
+{
+    const fb_data *addr;
+    int ymax;
+    int x = x0;
+
+    /* The Y coordinates have to work on even 8 pixel rows */
+    ymax = (y + height-1) >> 2;
+    y >>= 2;
+
+    if(x + width > LCD_WIDTH)
+        width = LCD_WIDTH - x;
+    if (width <= 0)
+        return; /* nothing left to do, 0 is harmful to lcd_write_data() */
+    if(ymax >= LCD_FBHEIGHT)
+        ymax = LCD_FBHEIGHT-1;
+
+    /* Copy specified rectange bitmap to hardware */
+    for (; y <= ymax; y++)
+    {
+        lcd_write_reg(LCD_CNTL_PAGE, y);
+        lcd_write_reg(LCD_CNTL_COLUMN, x0);
+
+        addr = &lcd_framebuffer[y][x0];
+
+        lcd_send_cmd(LCD_CNTL_DATA_WRITE);
+        for (x = x0; x < width; x++)
+            lcd_send_data(*addr++);
+    }
+}
+
+/* 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);
+}