sh: SH7760 DMABRG support.

The DMABRG is a special DMA unit within the SH7760 which does data
transfers from main memory to Audio units and USB shared memory.
It has 3 IRQ lines which generate 10 events, which have to be masked
unmasked and acked in a single 32bit register. It works independently
from the tradition SH DMAC, but blocks usage of DMAC channel 0.

This patch adds 2 functions to associate callbacks with DMABRG events
and initialization.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/include/asm-sh/dmabrg.h b/include/asm-sh/dmabrg.h
new file mode 100644
index 000000000000..c5edba216cf1
--- /dev/null
+++ b/include/asm-sh/dmabrg.h
@@ -0,0 +1,23 @@
+/*
+ * SH7760 DMABRG (USB/Audio) support
+ */
+
+#ifndef _DMABRG_H_
+#define _DMABRG_H_
+
+/* IRQ sources */
+#define DMABRGIRQ_USBDMA        0
+#define DMABRGIRQ_USBDMAERR     1
+#define DMABRGIRQ_A0TXF         2
+#define DMABRGIRQ_A0TXH         3
+#define DMABRGIRQ_A0RXF         4
+#define DMABRGIRQ_A0RXH         5
+#define DMABRGIRQ_A1TXF         6
+#define DMABRGIRQ_A1TXH         7
+#define DMABRGIRQ_A1RXF         8
+#define DMABRGIRQ_A1RXH         9
+
+extern int dmabrg_request_irq(unsigned int, void(*)(void *), void *);
+extern void dmabrg_free_irq(unsigned int);
+
+#endif