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ssb: fix DMA translation for some specific boards

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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>
This commit is contained in:
Rafał Miłecki 2011-08-14 19:39:40 +02:00 committed by John W. Linville
parent 292121dce2
commit 04023afcce
1 changed files with 21 additions and 3 deletions
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24
drivers/ssb/main.c
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@ -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);
}