From 05aec233367262a43dbf0b615099757162e36f88 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Wed, 20 Jul 2011 19:52:15 +0200 Subject: bcma: inform drivers about translation bits needed for the core MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When using DMA, drivers need to pass special translation info to the hardware. Signed-off-by: Rafał Miłecki Signed-off-by: John W. Linville --- drivers/bcma/core.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'drivers/bcma') diff --git a/drivers/bcma/core.c b/drivers/bcma/core.c index 2d8506dbca76..4a04a49cc06d 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); -- cgit v1.2.2