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bcma: inform drivers about translation bits needed for the core

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When using DMA, drivers need to pass special translation info to the
hardware.

Signed-off-by: Rafał Miłecki <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
This commit is contained in:
Rafał Miłecki 2011-07-20 19:52:15 +02:00 • committed by John W. Linville
commit 05aec23336
2 changed files with 21 additions and 0 deletions
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16
drivers/bcma/core.c
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@ -106,3 +106,19 @@ void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status, bool on)
}
}
EXPORT_SYMBOL_GPL(bcma_core_pll_ctl);
u32 bcma_core_dma_translation(struct bcma_device *core)
{
switch (core->bus->hosttype) {
case BCMA_HOSTTYPE_PCI:
if (bcma_aread32(core, BCMA_IOST) & BCMA_IOST_DMA64)
return BCMA_DMA_TRANSLATION_DMA64_CMT;
else
return BCMA_DMA_TRANSLATION_DMA32_CMT;
default:
pr_err("DMA translation unknown for host %d\n",
core->bus->hosttype);
}
return BCMA_DMA_TRANSLATION_NONE;
}
EXPORT_SYMBOL(bcma_core_dma_translation);