Remote LCD communication driver for X5, very loosely based on patch FS#5634 by Rani Hod

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10331 a1c6a512-1295-4272-9138-f99709370657

5 files changed, 220 insertions, 0 deletions

diff --git a/firmware/SOURCES b/firmware/SOURCES
index 7394c6abdf..bef54c0319 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -225,5 +225,6 @@ target/coldfire/iaudio/x5/system-x5.c
 target/coldfire/iaudio/x5/usb-x5.c
 target/coldfire/iaudio/x5/backlight-x5.c
 target/coldfire/iaudio/x5/m5636-x5.c
+target/coldfire/iaudio/x5/lcd-remote-x5.c
 #endif
 #endif
diff --git a/firmware/target/coldfire/iaudio/x5/backlight-target.h b/firmware/target/coldfire/iaudio/x5/backlight-target.h
index 5b6f7e1f8f..262650ae24 100755
--- a/firmware/target/coldfire/iaudio/x5/backlight-target.h
+++ b/firmware/target/coldfire/iaudio/x5/backlight-target.h
@@ -21,5 +21,7 @@
 
 void __backlight_on(void);
 void __backlight_off(void);
+void __remote_backlight_on(void);
+void __remote_backlight_off(void);
 
 #endif
diff --git a/firmware/target/coldfire/iaudio/x5/backlight-x5.c b/firmware/target/coldfire/iaudio/x5/backlight-x5.c
index 2b09d14b55..91c7224267 100755
--- a/firmware/target/coldfire/iaudio/x5/backlight-x5.c
+++ b/firmware/target/coldfire/iaudio/x5/backlight-x5.c
@@ -35,3 +35,13 @@ void __backlight_off(void)
     pcf50606_write(0x38, 0x80); /* Backlight OFF, GPO1INV=1, GPO1ACT=000 */
     set_irq_level(level);
 }
+
+void __remote_backlight_on(void)
+{
+    and_l(~0x00200000, &GPIO_OUT);
+}
+
+void __remote_backlight_off(void)
+{
+    or_l(0x00200000, &GPIO_OUT);
+}
diff --git a/firmware/target/coldfire/iaudio/x5/lcd-remote-target.h b/firmware/target/coldfire/iaudio/x5/lcd-remote-target.h
new file mode 100755
index 0000000000..72d4ed9fb2
--- /dev/null
+++ b/firmware/target/coldfire/iaudio/x5/lcd-remote-target.h
@@ -0,0 +1,30 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Linus Nielsen Feltzing
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#ifndef LCD_REMOTE_TARGET_H
+#define LCD_REMOTE_TARGET_H
+
+void lcd_remote_write_command(int cmd);
+void lcd_remote_write_command_ex(int cmd, int data);
+void lcd_remote_write_data(const unsigned char* p_bytes, int count);
+bool remote_detect(void);
+void lcd_remote_powersave(bool on);
+void lcd_remote_set_contrast(int val);
+void remote_set_row_and_col(int row, int col);
+
+#endif
diff --git a/firmware/target/coldfire/iaudio/x5/lcd-remote-x5.c b/firmware/target/coldfire/iaudio/x5/lcd-remote-x5.c
new file mode 100755
index 0000000000..c1ec00f0e7
--- /dev/null
+++ b/firmware/target/coldfire/iaudio/x5/lcd-remote-x5.c
@@ -0,0 +1,177 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Linus Nielsen Feltzing
+ *
+ * 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 "system.h"
+#include "kernel.h"
+
+/* The LCD in the iAudio M3/M5/X5 remote control is a Tomato LSI 0350 */
+
+#define LCD_SET_DUTY_RATIO 0x48
+#define LCD_SELECT_ADC     0xa0
+#define LCD_SELECT_SHL     0xc0
+#define LCD_SET_COM0       0x44
+#define LCD_OSC_ON         0xab
+#define LCD_SELECT_DCDC    0x64
+#define LCD_SELECT_RES     0x20
+#define LCD_SET_VOLUME     0x81
+#define LCD_SET_BIAS       0x50
+#define LCD_CONTROL_POWER  0x28
+#define LCD_DISPLAY_ON     0xae
+#define LCD_SET_INITLINE   0x40
+#define LCD_SET_COLUMN     0x10
+#define LCD_SET_PAGE       0xb0
+#define LCD_SET_GRAY       0x88
+#define LCD_SET_PWM_FRC    0x90
+#define LCD_SET_POWER_SAVE 0xa8
+
+#define CS_LO      and_l(~0x00000020, &GPIO1_OUT)
+#define CS_HI      or_l(0x00000020, &GPIO1_OUT)
+#define CLK_LO     and_l(~0x00004000, &GPIO_OUT)
+#define CLK_HI     or_l(0x00004000, &GPIO_OUT)
+#define DATA_LO    and_l(~0x00002000, &GPIO_OUT)
+#define DATA_HI    or_l(0x00002000, &GPIO_OUT)
+#define RS_LO      and_l(~0x00008000, &GPIO_OUT)
+#define RS_HI      or_l(0x00008000, &GPIO_OUT)
+
+#define LCD_REMOTE_DEFAULT_CONTRAST 0x18;
+
+static int cached_contrast = LCD_REMOTE_DEFAULT_CONTRAST;
+static bool remote_initialized = false;
+
+static void remote_write(unsigned char byte, bool is_command)
+{
+    int i;
+  
+    CS_LO;
+    if (is_command)
+        RS_LO;
+    else
+        RS_HI;
+  
+    for (i = 0x80; i; i >>= 1)
+    {
+        CLK_LO;
+        if (i & byte) 
+            DATA_HI;
+        else
+            DATA_LO;
+        CLK_HI;
+    }
+
+    CS_HI;
+}
+
+void lcd_remote_write_command(int cmd)
+{
+    remote_write(cmd, true);
+}
+
+void lcd_remote_write_command_ex(int cmd, int data)
+{
+    remote_write(cmd, true);
+    remote_write(data, true);
+}
+
+void lcd_remote_write_data(const unsigned char* p_bytes, int count)
+{
+    while(count--)
+        remote_write(*p_bytes++, false);
+}
+
+void remote_set_row_and_col(int row, int col)
+{
+    lcd_remote_write_command(LCD_SET_PAGE | (row & 0xf));
+    lcd_remote_write_command_ex(LCD_SET_COLUMN | ((col >> 4) & 0xf),
+                                col & 0xf);
+}
+
+int lcd_remote_default_contrast(void)
+{
+    return LCD_REMOTE_DEFAULT_CONTRAST;
+}
+
+void lcd_remote_powersave(bool on)
+{
+    if (on)
+        lcd_remote_write_command(LCD_SET_POWER_SAVE | 1);
+    else
+        lcd_remote_write_command(LCD_SET_POWER_SAVE | 1);
+}
+
+void lcd_remote_set_contrast(int val)
+{
+    cached_contrast = val;
+    lcd_remote_write_command_ex(LCD_SET_VOLUME, val);
+}
+
+bool remote_detect(void)
+{
+    return (GPIO_READ & 0x01000000);
+}
+
+void remote_init(void)
+{
+    or_l(0x0000e000, &GPIO_OUT);
+    or_l(0x0000e000, &GPIO_ENABLE);
+    or_l(0x0000e000, &GPIO_FUNCTION);
+    
+    or_l(0x00000020, &GPIO1_OUT);
+    or_l(0x00000020, &GPIO1_ENABLE);
+    or_l(0x00000020, &GPIO1_FUNCTION);
+        
+    sleep(10);
+        
+    lcd_remote_write_command(LCD_SET_DUTY_RATIO);
+    lcd_remote_write_command(0x70);  /* 1/128 */
+    
+    lcd_remote_write_command(LCD_SELECT_ADC | 1); /* Reverse direction */
+    lcd_remote_write_command(LCD_SELECT_SHL | 8); /* Reverse direction */
+    
+    lcd_remote_write_command(LCD_SET_COM0);
+    lcd_remote_write_command(0x00);
+    
+    lcd_remote_write_command(LCD_OSC_ON);
+    
+    lcd_remote_write_command(LCD_SELECT_DCDC | 2); /* DC/DC 5xboost */
+    
+    lcd_remote_write_command(LCD_SELECT_RES | 7); /* Regulator resistor: 7.2 */
+    
+    lcd_remote_write_command(LCD_SET_BIAS | 6); /* 1/11 */
+    
+    lcd_remote_write_command(LCD_CONTROL_POWER | 7); /* All circuits ON */
+    
+    sleep(30);
+    
+    lcd_remote_write_command_ex(LCD_SET_GRAY | 0, 0x00);
+    lcd_remote_write_command_ex(LCD_SET_GRAY | 1, 0x00);
+    lcd_remote_write_command_ex(LCD_SET_GRAY | 2, 0x0c);
+    lcd_remote_write_command_ex(LCD_SET_GRAY | 3, 0x00);
+    lcd_remote_write_command_ex(LCD_SET_GRAY | 4, 0xcc);
+    lcd_remote_write_command_ex(LCD_SET_GRAY | 5, 0x00);
+    lcd_remote_write_command_ex(LCD_SET_GRAY | 6, 0xcc);
+    lcd_remote_write_command_ex(LCD_SET_GRAY | 7, 0x0c);
+    
+    lcd_remote_write_command(LCD_SET_PWM_FRC | 6); /* 4FRC + 12PWM */
+    
+    lcd_remote_write_command(LCD_DISPLAY_ON | 1); /* display on */
+
+    remote_initialized = true;
+
+    lcd_remote_set_contrast(cached_contrast);
+}