Low-level driver for the H100 remote control LCD, by Richard S. La Charite III

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6283 a1c6a512-1295-4272-9138-f99709370657

docs/CREDITS

@@ -104,3 +104,4 @@ Michiel van der Kolk
 Tony Motakis
 Andy Young
 Alexandre Bourget
+Richard S. La Charité III

firmware/SOURCES

@@ -114,6 +114,7 @@ drivers/lcd.S
 #ifdef IRIVER_H100
 #ifndef SIMULATOR
 drivers/uda1380.c
+drivers/lcd-h100-remote.c
 pcm_playback.c
 #endif
 #endif

firmware/drivers/lcd-h100-remote.c

@@ -0,0 +1,194 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 by Richard S. La Charité III
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * 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 "kernel.h"
+#include "thread.h"
+
+#if CONFIG_CPU == MCF5249
+
+#define CS_LO       GPIO_OUT &= ~0x00000004
+#define CS_HI       GPIO_OUT |= 0x00000004
+#define CLK_LO      GPIO_OUT &= ~0x10000000
+#define CLK_HI      GPIO_OUT |= 0x10000000
+#define DATA_LO     GPIO_OUT &= ~0x00040000
+#define DATA_HI     GPIO_OUT |= 0x00040000
+#define RS_LO       GPIO_OUT &= ~0x00010000
+#define RS_HI       GPIO_OUT |= 0x00010000
+
+/* delay loop */
+#define DELAY   do { int _x; for(_x=0;_x<3;_x++);} while (0)
+
+void lcd_remote_write_command(int cmd)
+{
+    int i;
+    
+    CS_LO;
+    RS_LO;
+    
+    for (i = 0; i < 8; i++)
+    {
+        if (cmd & 0x80)
+            DATA_HI;
+        else
+            DATA_LO;
+        
+        CLK_HI;
+        cmd <<= 1;
+        DELAY;
+        
+        CLK_LO;
+    }
+    
+    CS_HI;
+}
+
+void lcd_remote_write_data(const unsigned char* p_bytes, int count)
+{
+    int i, j;
+    int data;
+    
+    CS_LO;
+    RS_HI;
+    
+    for (i = 0; i < count; i++)
+    {
+        data = p_bytes[i];
+        
+        for (j = 0; j < 8; j++)
+        {
+            if (data & 0x80)
+                DATA_HI;
+            else
+                DATA_LO;
+            
+            CLK_HI;
+            data <<= 1;
+            DELAY;
+            
+            CLK_LO;
+        }
+    }
+    
+    CS_HI;
+}
+
+void lcd_remote_write_command_ex(int cmd, int data1, int data2)
+{
+    int i;
+    
+    CS_LO;
+    RS_LO;
+    
+    for (i = 0; i < 8; i++)
+    {
+        if (cmd & 0x80)
+            DATA_HI;
+        else
+            DATA_LO;
+        
+        CLK_HI;
+        cmd <<= 1;
+        DELAY;
+        
+        CLK_LO;
+    }
+    
+    RS_HI;
+    
+    for (i = 0; i < 8; i++)
+    {
+        if (data1 & 0x80)
+            DATA_HI;
+        else
+            DATA_LO;
+        
+        CLK_HI;
+        data1 <<= 1;
+        DELAY;
+        
+        CLK_LO;
+    }
+    
+    if (data2 != -1)
+    {
+        for (i = 0; i < 8; i++)
+        {
+            if (data2 & 0x80)
+                DATA_HI;
+            else
+                DATA_LO;
+            
+            CLK_HI;
+            data2 <<= 1;
+            DELAY;
+            
+            CLK_LO;
+        }
+    }
+    
+    CS_HI;
+}
+
+#define LCD_REMOTE_ADC_NORMAL       0xa0
+#define LCD_REMOTE_ADC_REVERSE      0xa1
+
+#define LCD_REMOTE_SHL_NORMAL       0xc0
+#define LCD_REMOTE_SHL_REVERSE      0xc8
+
+#define LCD_REMOTE_DISPLAY_OFF      0xae
+#define LCD_REMOTE_DISPLAY_ON       0xaf
+
+#define LCD_REMOTE_REVERSE_OFF      0xa6
+#define LCD_REMOTE_REVERSE_ON       0xa7
+
+#define LCD_REMOTE_DISPLAY_NORMAL   0xa4
+#define LCD_REMOTE_DISPLAY_ENTIRE   0xa5
+
+#define LCD_REMOTE_NO_OPERATION     0xe3
+
+#define LCD_REMOTE_POWER_CONTROL    0x2b
+
+void lcd_remote_init(void)
+{
+    GPIO_FUNCTION   |= 0x10010000;  /* GPIO16: RS
+                                       GPIO28: CLK */
+    
+    GPIO1_FUNCTION  |= 0x00040004;  /* GPIO34: CS
+                                       GPIO50: Data */
+    GPIO_ENABLE     |= 0x10010000;
+    GPIO1_ENABLE    |= 0x00040004;
+
+    CLK_LO;
+    CS_HI;
+}
+
+/*
+    lcd_remote_write_command(LCD_REMOTE_ADC_NORMAL);
+    lcd_remote_write_command(LCD_REMOTE_SHL_NORMAL);
+    lcd_remote_write_command(0xA2); // Bias 0
+    lcd_remote_write_command(LCD_REMOTE_POWER_CONTROL | 0x4);	// Convertor
+    // 1ms
+    lcd_remote_write_command(LCD_REMOTE_POWER_CONTROL | 0x2);	// Regulator
+    // 1ms
+    lcd_remote_write_command(LCD_REMOTE_POWER_CONTROL | 0x1);	// Follower
+    // 1ms
+*/
+
+#endif

firmware/export/lcd.h

@@ -65,6 +65,9 @@ extern void lcd_update_rect(int x, int y, int width, int height);
   #define lcd_update_rect(x,y,w,h)
 #endif
 
+#ifdef IRIVER_H100
+void lcd_remote_init(void);
+#endif
 #ifdef HAVE_LCD_CHARCELLS
 
 /* Icon definitions for lcd_icon() */