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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

drivers/bcma/core.c

+16 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/bcma/bcma.h

+5 −0
Original line number Diff line number Diff line
@@ -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_ */