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

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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 45308
This commit is contained in:
Rafał Miłecki 2015-04-08 05:09:42 +00:00
parent 1d2abb6f16
commit 7798074429
2 changed files with 36 additions and 1 deletions
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35
target/linux/brcm47xx/patches-3.18/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch Normal file
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@ -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

2
target/linux/brcm47xx/patches-3.18/976-ssb_increase_pci_delay.patch
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@ -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. */