* move qt1106 specific things to their own files

* use CHANGE pin


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18496 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 108 insertions, 0 deletions

diff --git a/firmware/drivers/qt1106.c b/firmware/drivers/qt1106.c
new file mode 100644
index 0000000000..c80cfb7034
--- /dev/null
+++ b/firmware/drivers/qt1106.c
@@ -0,0 +1,108 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2008 by Frank Gevaerts
+ *
+ * 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 "qt1106.h"
+#include "cpu.h"
+#include "system.h"
+
+
+#define SPIDELAY(_x) void(_x);
+#define SETMOSI() (PDAT1 |= (1 << 6))
+#define CLRMOSI() (PDAT1 &= ~(1 << 6))
+
+#define MISO ((PDAT0 >> 3) & 1)
+#define RDY (PDAT1 & (1 << 5))
+
+#define SETCLK() (PDAT0 |= (1 << 1))
+#define CLRCLK() (PDAT0 &= ~(1 << 1))
+
+#define SETSS() (PDAT0 |= (1 << 0))
+#define CLRSS() (PDAT0 &= ~(1 << 0))
+
+#define CHANGE (PDAT0 & (1 << 4))
+
+
+void init_qt1106(void)
+{
+    int oldval;
+
+    oldval = PCON0;
+    //Set P0.0 and P0.1 to output, set P0.3 and P0.4 to input
+    PCON0 = ((oldval & ~(3 << 0 || 3 << 2 || 3 << 6 || 3 << 8)) | (1 << 0 | 1 << 2));
+
+    oldval = PCON1;
+    //Set P1.5 to input, set P1.6 to input
+    PCON1 = ((oldval & ~(0xf << 20 || 0xf << 24)) | (1 << 24));
+
+
+    SETSS();
+    SETCLK();
+}
+
+static inline void delay(int duration)
+{
+    volatile int i;
+    for(i=0;i<duration;i++);
+}
+
+void qt1106_wait(void)
+{
+    while(!(PDAT0 & (1 << 4))) {}
+}
+
+unsigned int qt1106_io(unsigned int output)
+{
+    unsigned int input = 0;
+    int i;
+
+    while(!RDY) {}
+
+    delay(10);  // < 470 us
+
+    CLRSS();
+    delay(13); // > 22 us
+
+    for (i = 0; i < 24; i++) {
+
+        CLRCLK();
+
+        if (output & (1 << 23))
+            SETMOSI();
+        else
+            CLRMOSI();
+        output <<= 1;
+
+        delay(20); // >> 6.7 us
+
+        SETCLK();
+
+        input |= MISO;
+        input <<= 1;
+
+        delay(20); // >> 6.7 us
+    }
+
+    SETSS();
+
+    return (input);
+}
+
+