From f4deea60273d34f643cf7965cab184f13d66f322 Mon Sep 17 00:00:00 2001
From: Rob Purchase <shotofadds@rockbox.org>
Date: Tue, 8 Apr 2008 08:01:18 +0000
Subject: [PATCH] D2: Update dual boot to use the hold switch. Update
 bootloader to show messages until HOLD released, keep holding POWER to show
 old debug screen (these modes will eventually be removed).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17032 a1c6a512-1295-4272-9138-f99709370657
---
 bootloader/telechips.c             | 24 +++++++++++-------------
 firmware/target/arm/tcc780x/crt0.S |  6 +++---
 2 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/bootloader/telechips.c b/bootloader/telechips.c
index 4c8b6ef5fd..da04101922 100644
--- a/bootloader/telechips.c
+++ b/bootloader/telechips.c
@@ -43,7 +43,7 @@
 #include "common.h"
 
 #if defined(COWON_D2)
-#include "i2c.h"
+#include "pcf50606.h"
 #define LOAD_ADDRESS 0x20000000 /* DRAM_START */
 #endif
 
@@ -97,11 +97,11 @@ void show_debug_screen(void)
            how such a beast is going to work. Since it needs I2C read/write,
            it can't easily go on an interrupt-based tick task. */
         {
-            unsigned char buf[] = { 0x2f, (0xE<<1) | 1, /* ADC start for X+Y */
-                                    0, 0, 0 };
             int x,y;
-            i2c_write(0x10, buf, 2);
-            i2c_readmem(0x10, 0x2e, buf, 5);
+            unsigned char buf[5];
+            
+            pcf50606_write(PCF5060X_ADCC2, (0xE<<1) | 1); /* ADC start X+Y */
+            pcf50606_read_multiple(PCF5060X_ADCC1, buf, 5);
             x = (buf[2] << 2) | (buf[3] & 3);
             y = (buf[4] << 2) | ((buf[3] & 0xC) >> 2);
             printf("X: 0x%03x Y: 0x%03x",x,y);
@@ -111,10 +111,8 @@ void show_debug_screen(void)
             lcd_hline(x-5, x+5, y);
             lcd_vline(x, y-5, y+5);
 
-            buf[0] = 0x2f;
-            buf[1] = (0xF<<1) | 1;   /* ADC start for P1+P2 */
-            i2c_write(0x10, buf, 2);
-            i2c_readmem(0x10, 0x2e, buf, 5);
+            pcf50606_write(PCF5060X_ADCC2, (0xF<<1) | 1); /* ADC start P1+P2 */
+            pcf50606_read_multiple(PCF5060X_ADCC1, buf, 5);
             x = (buf[2] << 2) | (buf[3] & 3);
             y = (buf[4] << 2) | ((buf[3] & 0xC) >> 2);
             printf("P1: 0x%03x P2: 0x%03x",x,y);
@@ -188,13 +186,13 @@ void* main(void)
     {
         int(*kernel_entry)(void);
 
-        /* wait for button release to allow debug statememts to be read */
-        while (button_read_device()) {};
+        /* wait for hold release to allow debug statements to be read */
+        while (button_hold()) {};
     
         kernel_entry = (void*) loadbuffer;
         
-        /* allow entry to the debug screen if hold is on */
-        if (!button_hold()) rc = kernel_entry();
+        /* allow entry to the debug screen if still holding power */
+        if (!(button_read_device() & POWEROFF_BUTTON)) rc = kernel_entry();
     }
 #endif
     show_debug_screen();
diff --git a/firmware/target/arm/tcc780x/crt0.S b/firmware/target/arm/tcc780x/crt0.S
index 05a8868d51..d328291a26 100644
--- a/firmware/target/arm/tcc780x/crt0.S
+++ b/firmware/target/arm/tcc780x/crt0.S
@@ -72,9 +72,9 @@ start_loc:
 #ifdef TCCBOOT
 #ifdef COWON_D2
     ldr    r0, =0xf005a000
-    ldr    r0, [r0, #0x40] /* Read GPIO B */
-    tst    r0, #0x4
-    ldreq  pc, [pc, #-28]  /* Jump to original firmware if keypad not pressed */
+    ldr    r0, [r0, #0x20] /* Read GPIO A */
+    tst    r0, #0x8
+    ldrne  pc, [pc, #-28]  /* Jump to original firmware if HOLD not pressed */
 #else
     #error No bootup key detection implemented for this target
 #endif