1 files changed, 103 insertions, 0 deletions

diff --git a/firmware/target/coldfire/mpio/hd200/lcd-as-hd200.S b/firmware/target/coldfire/mpio/hd200/lcd-as-hd200.S
new file mode 100644
index 0000000000..add9f694de
--- /dev/null
+++ b/firmware/target/coldfire/mpio/hd200/lcd-as-hd200.S
@@ -0,0 +1,103 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id:$
+ *
+ * Copyright (C) 2010 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 "cpu.h"
+
+
+#define LCD_BASE_ADDRESS 0xf0000000
+
+    .section    .icode,"ax",@progbits
+
+    .align      2
+    .global     lcd_write_command
+    .type       lcd_write_command,@function
+
+lcd_write_command:
+    move.l  (4, %sp), %d0
+    move.w  %d0, LCD_BASE_ADDRESS       /* data is 1byte but CF uses word
+                                         * transfers only */
+    rts
+.wc_end:
+    .size   lcd_write_command,.wc_end-lcd_write_command
+
+
+    .align      2
+    .global     lcd_write_command_e
+    .type       lcd_write_command_e,@function
+
+lcd_write_command_e:
+    lea.l   LCD_BASE_ADDRESS, %a0
+
+    move.l  (4, %sp), %d0       /* Command */
+    move.w  %d0, (%a0)         
+    move.l  (8, %sp), %d0       /* Data */
+    move.w  %d0, (%a0)          /* Write to LCD */
+
+    rts
+.wce_end:
+    .size   lcd_write_command_e,.wce_end-lcd_write_command_e
+
+
+    .align      2
+    .global     lcd_write_data
+    .type       lcd_write_data,@function
+
+/* PIXELFORMAT = VERTICAL_INTERLEAVED
+ * this means that data is packed verticaly in 8 pixels columns
+ * first byte is lsb of 2bit color in column
+ * second byte is msb of 2bit color in column
+ * so one word of data equals 8 pixels i 2bits color depth packed
+ * verticaly
+ */
+lcd_write_data:
+    movem.l (4, %sp), %a0            /* Data pointer */
+    move.l  (8, %sp), %d0            /* Length i in words */
+    lea     LCD_BASE_ADDRESS+2, %a1  /* LCD data port address */
+
+    btst    #0, %d0    /* longwords multiply? */
+    beq    .l_write
+
+.w_write:
+    move.w  (%a0)+, %d1  /* load data         3 cycles*/
+    move.w  %d1, (%a1)   /* first byte        1 cycle*/
+    lsr.l   #8, %d1      /* load second byte  1 cycle*/
+    move.w  %d1, (%a1)   /* transfer          1 cycle*/
+    subq.l  #1, %d0      /* decrement counter 1 cycle*/
+    beq     .write_end   
+    
+.l_write:
+    move.l  (%a0)+, %d1  /* load data         2 cycles*/
+    swap    %d1          /*                   1 cycle */
+    move.w  %d1, (%a1)   /* first byte        1 cycle*/
+    lsr.l   #8, %d1      /*                   1 cycle */
+    move.w  %d1, (%a1)   /* second byte       1 cycle*/
+    lsr.l   #8, %d1      /*                   1 cycle */
+    move.w  %d1, (%a1)   /* third byte        1 cycle*/
+    lsr.l   #8, %d1      /*                   1 cycle */
+    move.w  %d1, (%a1)   /* forth byte        1 cycle*/
+    subq.l  #2, %d0      /* decrement counter 1 cycle*/
+    bne     .l_write
+
+.write_end:
+    rts
+    .size   lcd_write_data,.wd_end-lcd_write_data
+