When using DMA, drivers need to pass special translation info to the hardware.
Signed-off-by: Rafał Miłecki <[email protected]> --- drivers/bcma/core.c | 16 ++++++++++++++++ include/linux/bcma/bcma.h | 5 +++++ 2 files changed, 21 insertions(+), 0 deletions(-) diff --git a/drivers/bcma/core.c b/drivers/bcma/core.c index 2d8506d..4a04a49 100644 --- a/drivers/bcma/core.c +++ b/drivers/bcma/core.c @@ -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); diff --git a/include/linux/bcma/bcma.h b/include/linux/bcma/bcma.h index cc1582d..8c96654 100644 --- a/include/linux/bcma/bcma.h +++ b/include/linux/bcma/bcma.h @@ -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_ */ -- 1.7.3.4 _______________________________________________ b43-dev mailing list [email protected] http://lists.infradead.org/mailman/listinfo/b43-dev
