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: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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 @@
}
}
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);