sudmac: add support for SUDMAC

Some Renesas USB modules have SUDMAC. This patch supports it using
the shdma-base driver.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/include/linux/sudmac.h b/include/linux/sudmac.h
new file mode 100644
index 000000000000..377b8a5788fa
--- /dev/null
+++ b/include/linux/sudmac.h
@@ -0,0 +1,52 @@
+/*
+ * Header for the SUDMAC driver
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+#ifndef SUDMAC_H
+#define SUDMAC_H
+
+#include <linux/dmaengine.h>
+#include <linux/shdma-base.h>
+#include <linux/types.h>
+
+/* Used by slave DMA clients to request DMA to/from a specific peripheral */
+struct sudmac_slave {
+        struct shdma_slave      shdma_slave;    /* Set by the platform */
+};
+
+/*
+ * Supplied by platforms to specify, how a DMA channel has to be configured for
+ * a certain peripheral
+ */
+struct sudmac_slave_config {
+        int             slave_id;
+};
+
+struct sudmac_channel {
+        unsigned long   offset;
+        unsigned long   config;
+        unsigned long   wait;           /* The configuable range is 0 to 3 */
+        unsigned long   dint_end_bit;
+};
+
+struct sudmac_pdata {
+        const struct sudmac_slave_config *slave;
+        int slave_num;
+        const struct sudmac_channel *channel;
+        int channel_num;
+};
+
+/* Definitions for the sudmac_channel.config */
+#define SUDMAC_TX_BUFFER_MODE   BIT(0)
+#define SUDMAC_RX_END_MODE      BIT(1)
+
+/* Definitions for the sudmac_channel.dint_end_bit */
+#define SUDMAC_DMA_BIT_CH0      BIT(0)
+#define SUDMAC_DMA_BIT_CH1      BIT(1)
+
+#endif