From 3637ef9b326f9b8e731350c21456659796845ab2 Mon Sep 17 00:00:00 2001
From: Frank Gevaerts <frank@gevaerts.be>
Date: Wed, 10 Sep 2008 19:08:46 +0000
Subject: First reading out of the touchpad! disabled power handling for now,
 so the device will power off when unplugged again (because there is no other
 poweroff method provided)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18480 a1c6a512-1295-4272-9138-f99709370657
---
 bootloader/meizu_m6sl.c | 196 +++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 170 insertions(+), 26 deletions(-)

(limited to 'bootloader/meizu_m6sl.c')

diff --git a/bootloader/meizu_m6sl.c b/bootloader/meizu_m6sl.c
index 3ee88120b5..8826abbcf0 100644
--- a/bootloader/meizu_m6sl.c
+++ b/bootloader/meizu_m6sl.c
@@ -47,10 +47,164 @@
 #include <stdarg.h>
 
 char version[] = APPSVERSION;
+#define LONG_DELAY  200000
+#define SHORT_DELAY  50000
+#define PAUSE_DELAY  50000
+
+#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 SPISPEED 10000
+
+#define QT_CT 0x00800000
+
+#define QT_AKS_DISABLED 0x00000000
+#define QT_AKS_GLOBAL   0x00010000
+#define QT_AKS_MODE1    0x00020000
+#define QT_AKS_MODE2    0x00030000
+#define QT_AKS_MODE3    0x00040000
+#define QT_AKS_MODE4    0x00050000
+
+#define QT_SLD_WHEEL    0x00000000
+#define QT_SLD_SLIDER   0x00080000
+
+#define QT_KEY7_NORMAL  0x00000000
+#define QT_KEY7_PROX    0x00100000
+
+#define QT_MODE_FREE    0x00000000
+#define QT_MODE_LP1     0x00000100
+#define QT_MODE_LP2     0x00000200
+#define QT_MODE_LP3     0x00000300
+#define QT_MODE_LP4     0x00000400
+#define QT_MODE_SYNC    0x00000500
+#define QT_MODE_SLEEP   0x00000600
+
+#define QT_LPB          0x00000800
+#define QT_DI           0x00001000
+
+#define QT_MOD_10       0x00000000
+#define QT_MOD_20       0x00002000
+#define QT_MOD_60       0x00004000
+#define QT_MOD_INF      0x00006000
+
+#define QT_CAL_ALL      0x00000000
+#define QT_CAL_KEYS     0x00000008
+#define QT_CAL_WHEEL    0x00000010
+#define QT_RES_4        0x00000020
+#define QT_RES_8        0x00000040
+#define QT_RES_16       0x00000060
+#define QT_RES_32       0x00000080
+#define QT_RES_64       0x000000A0
+#define QT_RES_128      0x000000C0
+#define QT_RES_256      0x000000E0
+
+
+static inline void delay(int duration)
+{
+    volatile int i;
+    for(i=0;i<duration;i++);
+}
+
+
+void init_qt1106(void)
+{
+    int oldval;
+
+    oldval = PCON0;
+    //Set P0.0 and P0.1 to output, set P0.3 to input
+    PCON0 = ((oldval & ~(3 << 0 || 3 << 2 || 3 << 6)) | (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();
+}
+
+unsigned read_qt1106(unsigned int input)
+{
+    int output = 0;
+    int i;
+
+    while(!RDY) {}
+
+    delay(10);  // < 470 us
+
+    CLRSS();
+    delay(13); // > 22 us
+
+    for (i = 0; i < 24; i++) {
+
+        CLRCLK();
+
+        if (input & (1 << 23))
+            SETMOSI();
+        else
+            CLRMOSI();
+        input <<= 1;
+
+        delay(20); // >> 6.7 us
+
+        SETCLK();
+
+        output |= MISO;
+        output <<= 1;
+
+        delay(20); // >> 6.7 us
+    }
+
+    SETSS();
+
+    return (output & 0x00FFFFFF);
+}
+
+
+void bl_debug(bool bit)
+{
+    if (bit)
+    {
+        PDAT0 ^= (1 << 2); //Toggle backlight
+        delay(LONG_DELAY);
+        PDAT0 ^= (1 << 2); //Toggle backlight
+        delay(LONG_DELAY);
+        //for(i=0;i<pause_delay;i++);
+    }
+    else
+    {
+        PDAT0 ^= (1 << 2); //Toggle backlight
+        delay(SHORT_DELAY);
+        PDAT0 ^= (1 << 2); //Toggle backlight
+        delay(SHORT_DELAY);
+        //for(i=0;i<pause_delay;i++);
+    }
+}
+
+void bl_debug_int(unsigned int input)
+{
+    unsigned int i;
+    for (i = 0; i < input; i++)
+    {
+        PDAT0 ^= (1 << 2); //Toggle backlight
+        delay(SHORT_DELAY);
+        PDAT0 ^= (1 << 2); //Toggle backlight
+        delay(2*SHORT_DELAY);
+    }
+    delay(SHORT_DELAY*6);
+}
 
 void main(void)
 {
-    int counter=0;
     //Set backlight pin to output and enable
     int oldval = PCON0;
     PCON0 = ((oldval & ~(3 << 4)) | (1 << 4));
@@ -60,37 +214,27 @@ void main(void)
     oldval = PCON1;
     PCON1 = ((oldval & ~(0xf << 16)) | (0 << 16));
 
-    //Set the piezo pins to output
-    oldval = PCON5;
-    PCON5 = ((oldval & ~((0xf << 4) | (0xf << 8))) | ((1 << 0) | (1 << 4)));
-    PDAT5 &= ~((1 << 1) | (1 << 2)); //should not be needed
+    init_qt1106();
 
-    PDAT5 |= (1 << 1); //Toggle piezo +
+    // Wait for play to be pressed
+    while(!(PDAT1 & (1 << 4)));
+    // Wait for play to be released
+    while((PDAT1 & (1 << 4)));
+    PDAT0 ^= (1 << 2); //Toggle backlight
 
-    //toggle backlight on PLAY
-    while(counter<20)
-    {
-        // Wait for play to be pressed
-        while(!(PDAT1 & (1 << 4)))
-        {
-        }
+    /* Calibrate the lot */
+    read_qt1106(QT_MODE_FREE | QT_MOD_INF | QT_DI | QT_SLD_SLIDER | QT_CAL_WHEEL | QT_CAL_KEYS | QT_RES_4);
 
-        PDAT5 ^= (1 << 1); //Toggle piezo +
-        PDAT0 ^= (1 << 2); //Toggle backlight
-        counter++;
+    /* Set to maximum sensitivity */
+    read_qt1106(QT_CT | (0x00 << 8) );
 
-        // Wait for play to be released
-        while(PDAT1 & (1 << 4))
-        {
-        }
-    }
-    //toggle a few times to warn that we're done
-    for(counter=0;counter<10;counter++)
+    while(true)
     {
-        volatile int i;
-        for(i=0;i<50000;i++);
-        PDAT0 ^= (1 << 2); //Toggle backlight
+        int slider = read_qt1106(QT_MODE_FREE | QT_MOD_INF | QT_DI | QT_SLD_SLIDER | QT_RES_4);
+        bl_debug_int(((slider&0xff)) + 1);
     }
+
+    //power off
     PDAT1&=~(1<<3);
 }
 
-- 
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