brcm47xx: add fix "Data bus error" on CardBus ssb SoCs

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45308 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/brcm47xx/patches-3.18/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch b/target/linux/brcm47xx/patches-3.18/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch
new file mode 100644 (file)
index 0000000..e860acb
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.18/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch
@@ -0,0 +1,35 @@
+From 5c81397a0147ea59c778d1de14ef54e2268221f6 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Wed, 8 Apr 2015 06:58:11 +0200
+Subject: [PATCH] ssb: reject PCI writes setting CardBus bridge resources
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+If SoC has a CardBus we can set resources of device at slot 1 only. It's
+impossigle to set bridge resources as it simply overwrites device 1
+configuration and usually results in Data bus error-s.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+---
+ drivers/ssb/driver_pcicore.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/drivers/ssb/driver_pcicore.c b/drivers/ssb/driver_pcicore.c
+index 15a7ee3..c603d19 100644
+--- a/drivers/ssb/driver_pcicore.c
++++ b/drivers/ssb/driver_pcicore.c
+@@ -164,6 +164,10 @@ static int ssb_extpci_write_config(struct ssb_pcicore *pc,
+       SSB_WARN_ON(!pc->hostmode);
+       if (unlikely(len != 1 && len != 2 && len != 4))
+               goto out;
++      /* CardBus SoCs allow configuring dev 1 resources only */
++      if (extpci_core->cardbusmode && dev != 1 &&
++          off >= PCI_BASE_ADDRESS_0 && off <= PCI_BASE_ADDRESS_5)
++              goto out;
+       addr = get_cfgspace_addr(pc, bus, dev, func, off);
+       if (unlikely(!addr))
+               goto out;
+-- 
+1.8.4.5
+

diff --git a/target/linux/brcm47xx/patches-3.18/976-ssb_increase_pci_delay.patch b/target/linux/brcm47xx/patches-3.18/976-ssb_increase_pci_delay.patch
index b56f1d5..bf93272 100644 (file)
--- a/target/linux/brcm47xx/patches-3.18/976-ssb_increase_pci_delay.patch
+++ b/target/linux/brcm47xx/patches-3.18/976-ssb_increase_pci_delay.patch
@@ -1,6 +1,6 @@
 --- a/drivers/ssb/driver_pcicore.c
 +++ b/drivers/ssb/driver_pcicore.c
-@@ -375,7 +375,7 @@ static void ssb_pcicore_init_hostmode(st
+@@ -388,7 +388,7 @@ static void ssb_pcicore_init_hostmode(st
        set_io_port_base(ssb_pcicore_controller.io_map_base);
        /* Give some time to the PCI controller to configure itself with the new
         * values. Not waiting at this point causes crashes of the machine. */