2 files changed, 21 insertions, 0 deletions

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_ */