Commit 05aec233 authored by Rafał Miłecki's avatar Rafał Miłecki Committed by John W. Linville
Browse files

bcma: inform drivers about translation bits needed for the core



When using DMA, drivers need to pass special translation info to the
hardware.
Signed-off-by: default avatarRafał Miłecki <zajec5@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent a9770a81
......@@ -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);
......@@ -262,5 +262,10 @@ extern void bcma_core_set_clockmode(struct bcma_device *core,
enum bcma_clkmode clkmode);
extern void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status,
bool on);
#define BCMA_DMA_TRANSLATION_MASK 0xC0000000
#define BCMA_DMA_TRANSLATION_NONE 0x00000000
#define BCMA_DMA_TRANSLATION_DMA32_CMT 0x40000000 /* Client Mode Translation for 32-bit DMA */
#define BCMA_DMA_TRANSLATION_DMA64_CMT 0x80000000 /* Client Mode Translation for 64-bit DMA */
extern u32 bcma_core_dma_translation(struct bcma_device *core);
#endif /* LINUX_BCMA_H_ */
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