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add a better pci fix for rb532

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5861 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2006-12-19 21:41:04 +00:00
parent 427f5c53f9
commit d94f1f9036
2 changed files with 25 additions and 48 deletions
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27
target/linux/rb532-2.6/patches/100-rb5xx_support.patch
View File

@ -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;
+}
+

46
target/linux/rb532-2.6/patches/210-pci_fixes.patch
View File

@ -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