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authorRafał Miłecki <zajec5@gmail.com>2011-08-14 19:39:40 +0200
committerJohn W. Linville <linville@tuxdriver.com>2011-08-24 14:41:41 -0400
commit04023afcce2eaff4f66d19ca21b106512fffabe7 (patch)
tree85b196fad65ddadde0081f14948e0ad5fe7897eb /drivers/ssb
parent292121dce2af63dab371102097a887de7cf24233 (diff)
ssb: fix DMA translation for some specific boards
Signed-off-by: Michael Buesch <m@bues.ch> Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/ssb')
-rw-r--r--drivers/ssb/main.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index 29c7d4f9d1a..d0cbdb0cf9d 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -1260,16 +1260,34 @@ void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
}
EXPORT_SYMBOL(ssb_device_disable);
+/* Some chipsets need routing known for PCIe and 64-bit DMA */
+static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
+{
+ u16 chip_id = dev->bus->chip_id;
+
+ if (dev->id.coreid == SSB_DEV_80211) {
+ return (chip_id == 0x4322 || chip_id == 43221 ||
+ chip_id == 43231 || chip_id == 43222);
+ }
+
+ return 0;
+}
+
u32 ssb_dma_translation(struct ssb_device *dev)
{
switch (dev->bus->bustype) {
case SSB_BUSTYPE_SSB:
return 0;
case SSB_BUSTYPE_PCI:
- if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64)
+ if (pci_is_pcie(dev->bus->host_pci) &&
+ ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
return SSB_PCIE_DMA_H32;
- else
- return SSB_PCI_DMA;
+ } else {
+ if (ssb_dma_translation_special_bit(dev))
+ return SSB_PCIE_DMA_H32;
+ else
+ return SSB_PCI_DMA;
+ }
default:
__ssb_dma_not_implemented(dev);
}