add a better pci fix for rb532

SVN-Revision: 5861
18 years ago · e8258da964
parent 6a5a5e896b
commit e8258da964
2 changed files with 25 additions and 48 deletions
--- a/target/linux/rb532-2.6/patches/100-rb5xx_support.patch
+++ b/target/linux/rb532-2.6/patches/100-rb5xx_support.patch
@ -130,13 +130,14 @@ diff -urN linux.old/arch/mips/pci/Makefile linux.dev/arch/mips/pci/Makefile
 diff -urN linux.old/arch/mips/pci/ops-rc32434.c linux.dev/arch/mips/pci/ops-rc32434.c
 --- linux.old/arch/mips/pci/ops-rc32434.c	1970-01-01 01:00:00.000000000 +0100
 +++ linux.dev/arch/mips/pci/ops-rc32434.c	2006-12-14 04:09:50.000000000 +0100
-@@ -0,0 +1,195 @@
+@@ -0,0 +1,218 @@
 +/**************************************************************************
 + *
 + *  BRIEF MODULE DESCRIPTION
 + *     pci_ops for IDT EB434 board
 + *
 + *  Copyright 2004 IDT Inc. (rischelp@idt.com)
+ *  Copyright 2006 Felix Fietkau <nbd@openwrt.org>
 + *         
 + *  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
@ -242,8 +243,30 @@ diff -urN linux.old/arch/mips/pci/ops-rc32434.c linux.dev/arch/mips/pci/ops-rc32
 +                             int where, u32 * val)
 +{
 +	int ret;
-+	
+	int delay = 1;
+
+	if (bus->number == 0 && (devfn >> 3) > 21)
+		return 0;
+
+retry:
 +	ret = config_access(PCI_ACCESS_READ, bus, devfn, where, val);
+	
+	/* PCI scan: check for invalid values, device may not have
+	 * finished initializing */
+
+	if (where == PCI_VENDOR_ID) {
+		if (ret == 0xffffffff || ret == 0x00000000 ||
+			ret == 0x0000ffff || ret == 0xffff0000) {
+
+			if (delay > 4)
+				return 0;
+
+			delay *= 2;
+			msleep(delay);
+			goto retry;
+		}
+	}
+	
 +	return ret;
 +}
 +
--- a/target/linux/rb532-2.6/patches/210-pci_fixes.patch
+++ b/target/linux/rb532-2.6/patches/210-pci_fixes.patch
@ -1,46 +0,0 @@
-diff -urN linux.old/drivers/pci/probe.c linux.dev/drivers/pci/probe.c
--- linux.old/drivers/pci/probe.c	2006-06-08 20:21:20.000000000 +0200
-+++ linux.dev/drivers/pci/probe.c	2006-06-08 20:19:40.000000000 +0200
-@@ -760,15 +760,22 @@
- 	u32 l;
- 	u8 hdr_type;
- 	int delay = 1;
-
-	if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, &l))
-		return NULL;
-
-	/* some broken boards return 0 or ~0 if a slot is empty: */
-	if (l == 0xffffffff || l == 0x00000000 ||
-	    l == 0x0000ffff || l == 0xffff0000)
-		return NULL;
-
-+	do {
-+		if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, &l))
-+			return NULL;
-+		/* some broken boards return 0 or ~0 if a slot is empty: */
-+		if (l == 0xffffffff || l == 0x00000000 ||
-+		    l == 0x0000ffff || l == 0xffff0000){
-+			if (delay > 4)
-+				return NULL;
-+			/* But that could also be the previous dev not settled */
-+			pr_debug("PCI: retrying scan at 0x%x, because config is 0x%x\n",devfn,l);
-+			msleep(delay);
-+			delay *=2;
-+			l=0;
-+		}
-+	}while (l==0);
-+	
- 	/* Configuration request Retry Status */
- 	while (l == 0xffff0001) {
- 		msleep(delay);
-@@ -903,7 +910,10 @@
- 
- 	/* Go find them, Rover! */
- 	for (devfn = 0; devfn < 0x100; devfn += 8)
-+	    {
-+	    if (bus->number == 0 && (devfn >> 3) > 21) break;
- 		pci_scan_slot(bus, devfn);
-+	    }
- 
- 	/*
- 	 * After performing arch-dependent fixup of the bus, look behind