From 05aec233367262a43dbf0b615099757162e36f88 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Wed, 20 Jul 2011 19:52:15 +0200 Subject: [PATCH] bcma: inform drivers about translation bits needed for the core MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 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 ++++++++++++++++ include/linux/bcma/bcma.h | 5 +++++ 2 files changed, 21 insertions(+) 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); diff --git a/include/linux/bcma/bcma.h b/include/linux/bcma/bcma.h index cc1582d24fbc..8c96654bef16 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_ */ -- 2.39.5