No more spinning disk while charging flashed FM+V2 (you need the new bootloader to utilize it). ToDo: remove now false voltage reading from charging screen.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4095 a1c6a512-1295-4272-9138-f99709370657

apps/main.c

@@ -144,7 +144,6 @@ void init(void)
         if (rc == 1 || rc == 2)  /* charger removed or "Off/Stop" pressed */
             power_off();
         /* "On" pressed or USB connected: proceed */
-        ide_power_enable(true);
     }
 
     rc = ata_init();

firmware/drivers/ata.c

@@ -795,6 +795,12 @@ int ata_init(void)
     ata_enable(true);
 
     if ( !initialized ) {
+        if (!ide_powered()) /* somebody has switched it off */
+        {
+            ide_power_enable(true);
+            sleep(HZ); /* allow voltage to build up */
+        }
+
         if (coldstart)
         {
             /* Reset both master and slave, we don't yet know what's in */

firmware/drivers/power.c

@@ -36,11 +36,6 @@ void power_init(void)
     or_b(0x20, &PBIORL); /* Set charging control bit to output */
     charger_enable(false); /* Default to charger OFF */
 #endif
-#ifdef HAVE_ATA_POWER_OFF
-    or_b(0x20, &PADRL); /* leave the disk on */
-    or_b(0x20, &PAIORL);
-    PACR2 &= 0xFBFF;
-#endif
 }
 
 bool charger_inserted(void)
@@ -79,16 +74,47 @@ void charger_enable(bool on)
 
 void ide_power_enable(bool on)
 {
-#ifdef HAVE_ATA_POWER_OFF
+    (void)on;
+    bool touched = false;
+
+#ifdef NEEDS_ATA_POWER_ON
     if(on)
+    {
         or_b(0x20, &PADRL);
-    else
+        touched = true;
+    }
+#endif
+#ifdef HAVE_ATA_POWER_OFF
+    if(!on)
+    {
         and_b(~0x20, &PADRL);
+        touched = true;
+    }
+#endif
+
+/* late port preparation, else problems with read/modify/write 
+   of other bits on same port, while input and floating high */
+    if (touched)
+    {
+        or_b(0x20, &PAIORL); /* PA5 is an output */
+        PACR2 &= 0xFBFF; /* GPIO for PA5 */
+    }
+}
+
+
+bool ide_powered(void)
+{
+#if defined(NEEDS_ATA_POWER_ON) || defined(HAVE_ATA_POWER_OFF)
+    if ((PACR2 & 0x0400) || !(PAIOR & 0x0020)) // not configured for output
+        return true; // would be floating high, disk on
+    else
+        return (PADR & 0x0020) != 0;
 #else
-    on = on;
+    return TRUE; /* pretend always powered if not controlable */
 #endif
 }
 
+
 void power_off(void)
 {
     set_irq_level(15);

firmware/export/config-fmrecorder.h

@@ -19,6 +19,9 @@
 /* Define this if you have a LiIon battery */
 #define HAVE_LIION
 
+/* Define this if you need to power on ATA */
+#define NEEDS_ATA_POWER_ON
+
 /* Define this to the CPU frequency */
 #define CPU_FREQ      11059200
 

firmware/export/config-recorder.h

@@ -19,6 +19,9 @@
 /* Define this if you have ATA power-off control */
 #define HAVE_ATA_POWER_OFF
 
+/* Define this if you need to power on ATA */
+#define NEEDS_ATA_POWER_ON
+
 /* Define this to the CPU frequency */
 #define CPU_FREQ      11059200
 

firmware/export/config-recorderv2.h

@@ -19,6 +19,9 @@
 /* Define this if you have a LiIon battery */
 #define HAVE_LIION
 
+/* Define this if you need to power on ATA */
+#define NEEDS_ATA_POWER_ON
+
 /* Define this to the CPU frequency */
 #define CPU_FREQ      11059200
 

firmware/export/power.h

@@ -27,6 +27,7 @@ void power_init(void);
 bool charger_inserted(void);
 void charger_enable(bool on);
 void ide_power_enable(bool on);
+bool ide_powered(void);
 void power_off(void);
 
 #endif

flash/bootloader/bootloader.c

@@ -139,8 +139,9 @@ void PlatformInit(void)
 	PBDR |= 0x20; // set PB5 to keep power (fixes the ON-holding problem)
 	PBIOR |= 0x20; // make PB5 an output
 	if (ReadADC(0) < 0x1FF) // charger plugged?
-	{
-		// how do we switch this off?
+	{	// switch off the HD, else a flat battery may not start
+		PACR2 &= 0xFBFF; // GPIO for PA5
+		PAIOR |= 0x20;	 // make PA5 an output (low by default)
 	}
 #endif