[LinuxBIOS] EPIA fix for non working IDE

[Ben Hewson]

Hi all

There has been a bug in the EPIA build which at some point stopped FILO 
being able to boot
from an IDE drive. After much digging I have found the problem and have 
changed the following
two files.

LinuxBIOSv2/src/mainboard/via/epia/auto.c
LinuxBIOSv2/src/southbridge/via/vt8231/vt8231_ide.c

I have also changed the default COM speed from 19200 to 115200. This is 
a personal thing but
every time I update LB I forget to change it back. Leave it out if you wish.

LinuxBIOSv2/src/mainboard/via/epia/Options.lb

I have attached a patch file. Can someone please see about checking & 
adding the fixes to the repository.

There is still an issue with the board sometimes hanging on boot.  So I 
would not class this as fully working just yet.

Regards
Ben Hewson

Index: /home/ben/sw/LinuxBIOSv2/src/mainboard/via/epia/auto.c
===================================================================
--- /home/ben/sw/LinuxBIOSv2/src/mainboard/via/epia/auto.c	(revision 2621)
+++ /home/ben/sw/LinuxBIOSv2/src/mainboard/via/epia/auto.c	(working copy)
@@ -66,8 +66,16 @@
    /* we do this here as in V2, we can not yet do raw operations 
     * to pci!
     */
-        dev += 0x100; /* ICKY */
-
+   
+   /* changed this to work correctly on later revisions of LB. 
+    * The original dev += 0x100; stopped working. It also appears
+    * that if this is not set here, but in ide_init() only, the IDE
+    * does not work at all. I assume it needs to be set before something else,
+    * possibly before enabling the IDE peripheral, or it is a timing issue.
+    * Ben Hewson 29 Apr 2007.
+    */
+	
+	dev = pci_locate_device(PCI_ID(0x1106,0x0571), 0);	
    pci_write_config8(dev, 0x42, 0);
 }

Index: /home/ben/sw/LinuxBIOSv2/src/southbridge/via/vt8231/vt8231_ide.c
===================================================================
--- /home/ben/sw/LinuxBIOSv2/src/southbridge/via/vt8231/vt8231_ide.c	(revision 2621)
+++ /home/ben/sw/LinuxBIOSv2/src/southbridge/via/vt8231/vt8231_ide.c	(working copy)
@@ -15,6 +15,12 @@
    	// Run the IDE controller in 'compatiblity mode - i.e. don't use PCI
    	// interrupts.  Using PCI ints confuses linux for some reason.
    	
+		/* Setting reg 0x42 here does not work. It is set in mainboard/auto.c
+		 * It probably can only be changed while the IDE is disabled 
+		 * or it is possibly a timing issue. Ben Hewson29 Apr 2007.
+		 */
+		
+		/*
    	printk_info("%s: enabling compatibility IDE addresses\n", __FUNCTION__);
    	enables = pci_read_config8(dev, 0x42);
    	printk_debug("enables in reg 0x42 0x%x\n", enables);
@@ -22,6 +28,8 @@
    	pci_write_config8(dev, 0x42, enables);
    	enables = pci_read_config8(dev, 0x42);
    	printk_debug("enables in reg 0x42 read back as 0x%x\n", enables);
+		*/
+		
    }
    
    enables = pci_read_config8(dev, 0x40);

Index: /home/ben/sw/LinuxBIOSv2/src/mainboard/via/epia/Options.lb
===================================================================
--- /home/ben/sw/LinuxBIOSv2/src/mainboard/via/epia/Options.lb	(revision 2621)
+++ /home/ben/sw/LinuxBIOSv2/src/mainboard/via/epia/Options.lb	(working copy)
@@ -51,7 +51,7 @@

default CONFIG_CONSOLE_SERIAL8250=1
 ## Select the serial console baud rate
-default TTYS0_BAUD=19200
+default TTYS0_BAUD=115200

# Select the serial console base port
 default TTYS0_BASE=0x3f8