When using DMA, drivers need to pass special translation info to the
hardware.
Signed-off-by: Rafał Miłecki <zajec5@xxxxxxxxx>
---
drivers/bcma/main.c | 12 ++++++++++++
include/linux/bcma/bcma.h | 2 ++
2 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index 873e2e4..660288c 100644
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -164,6 +164,18 @@ int bcma_bus_register(struct bcma_bus *bus)
return 0;
}
+u32 bcma_dma_translation(struct bcma_bus *bus)
+{
+ switch (bus->hosttype) {
+ case BCMA_HOSTTYPE_PCI:
+ return 0x40000000;
+ default:
+ pr_err("DMA translation unknown for host %d\n", bus->hosttype);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(bcma_dma_translation);
+
void bcma_bus_unregister(struct bcma_bus *bus)
{
bcma_unregister_cores(bus);
diff --git a/include/linux/bcma/bcma.h b/include/linux/bcma/bcma.h
index cc1582d..921671b 100644
--- a/include/linux/bcma/bcma.h
+++ b/include/linux/bcma/bcma.h
@@ -255,6 +255,8 @@ void bcma_awrite32(struct bcma_device *core, u16 offset, u32 value)
#define bcma_maskset32(cc, offset, mask, set) \
bcma_write32(cc, offset, (bcma_read32(cc, offset) & (mask)) | (set))
+extern u32 bcma_dma_translation(struct bcma_bus *bus);
+
extern bool bcma_core_is_enabled(struct bcma_device *core);
extern void bcma_core_disable(struct bcma_device *core, u32 flags);
extern int bcma_core_enable(struct bcma_device *core, u32 flags);
--
1.7.3.4
--
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