4 files changed, 180 insertions, 13 deletions

diff --git a/include/linux/acpi_dma.h b/include/linux/acpi_dma.h
new file mode 100644
index 000000000000..d09deabc7bf6
--- /dev/null
+++ b/include/linux/acpi_dma.h
@@ -0,0 +1,116 @@
+/*
+ * ACPI helpers for DMA request / controller
+ *
+ * Based on of_dma.h
+ *
+ * Copyright (C) 2013, Intel Corporation
+ * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_ACPI_DMA_H
+#define __LINUX_ACPI_DMA_H
+
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/dmaengine.h>
+
+/**
+ * struct acpi_dma_spec - slave device DMA resources
+ * @chan_id:	channel unique id
+ * @slave_id:	request line unique id
+ * @dev:	struct device of the DMA controller to be used in the filter
+ *		function
+ */
+struct acpi_dma_spec {
+	int		chan_id;
+	int		slave_id;
+	struct device	*dev;
+};
+
+/**
+ * struct acpi_dma - representation of the registered DMAC
+ * @dma_controllers:	linked list node
+ * @dev:		struct device of this controller
+ * @acpi_dma_xlate:	callback function to find a suitable channel
+ * @data:		private data used by a callback function
+ */
+struct acpi_dma {
+	struct list_head	dma_controllers;
+	struct device		*dev;
+	struct dma_chan		*(*acpi_dma_xlate)
+				(struct acpi_dma_spec *, struct acpi_dma *);
+	void			*data;
+};
+
+/* Used with acpi_dma_simple_xlate() */
+struct acpi_dma_filter_info {
+	dma_cap_mask_t	dma_cap;
+	dma_filter_fn	filter_fn;
+};
+
+#ifdef CONFIG_DMA_ACPI
+
+int acpi_dma_controller_register(struct device *dev,
+		struct dma_chan *(*acpi_dma_xlate)
+		(struct acpi_dma_spec *, struct acpi_dma *),
+		void *data);
+int acpi_dma_controller_free(struct device *dev);
+int devm_acpi_dma_controller_register(struct device *dev,
+		struct dma_chan *(*acpi_dma_xlate)
+		(struct acpi_dma_spec *, struct acpi_dma *),
+		void *data);
+void devm_acpi_dma_controller_free(struct device *dev);
+
+struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev,
+						      size_t index);
+struct dma_chan *acpi_dma_request_slave_chan_by_name(struct device *dev,
+						     const char *name);
+
+struct dma_chan *acpi_dma_simple_xlate(struct acpi_dma_spec *dma_spec,
+				       struct acpi_dma *adma);
+#else
+
+static inline int acpi_dma_controller_register(struct device *dev,
+		struct dma_chan *(*acpi_dma_xlate)
+		(struct acpi_dma_spec *, struct acpi_dma *),
+		void *data)
+{
+	return -ENODEV;
+}
+static inline int acpi_dma_controller_free(struct device *dev)
+{
+	return -ENODEV;
+}
+static inline int devm_acpi_dma_controller_register(struct device *dev,
+		struct dma_chan *(*acpi_dma_xlate)
+		(struct acpi_dma_spec *, struct acpi_dma *),
+		void *data)
+{
+	return -ENODEV;
+}
+static inline void devm_acpi_dma_controller_free(struct device *dev)
+{
+}
+
+static inline struct dma_chan *acpi_dma_request_slave_chan_by_index(
+		struct device *dev, size_t index)
+{
+	return NULL;
+}
+static inline struct dma_chan *acpi_dma_request_slave_chan_by_name(
+		struct device *dev, const char *name)
+{
+	return NULL;
+}
+
+#define acpi_dma_simple_xlate	NULL
+
+#endif
+
+#define acpi_dma_request_slave_channel	acpi_dma_request_slave_chan_by_index
+
+#endif /* __LINUX_ACPI_DMA_H */
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 91ac8da25020..96d3e4ab11a9 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -967,8 +967,9 @@ enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie);
 #ifdef CONFIG_DMA_ENGINE
 enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx);
 void dma_issue_pending_all(void);
-struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param);
-struct dma_chan *dma_request_slave_channel(struct device *dev, char *name);
+struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask,
+					dma_filter_fn fn, void *fn_param);
+struct dma_chan *dma_request_slave_channel(struct device *dev, const char *name);
 void dma_release_channel(struct dma_chan *chan);
 #else
 static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx)
@@ -978,13 +979,13 @@ static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descript
 static inline void dma_issue_pending_all(void)
 {
 }
-static inline struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask,
+static inline struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask,
 					      dma_filter_fn fn, void *fn_param)
 {
 	return NULL;
 }
 static inline struct dma_chan *dma_request_slave_channel(struct device *dev,
-							 char *name)
+							 const char *name)
 {
 	return NULL;
 }
@@ -1005,9 +1006,9 @@ struct dma_chan *net_dma_find_channel(void);
 	__dma_request_slave_channel_compat(&(mask), x, y, dev, name)
 
 static inline struct dma_chan
-*__dma_request_slave_channel_compat(dma_cap_mask_t *mask, dma_filter_fn fn,
-				  void *fn_param, struct device *dev,
-				  char *name)
+*__dma_request_slave_channel_compat(const dma_cap_mask_t *mask,
+				  dma_filter_fn fn, void *fn_param,
+				  struct device *dev, char *name)
 {
 	struct dma_chan *chan;
 
diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h
index d15073e080dd..364dda734877 100644
--- a/include/linux/of_dma.h
+++ b/include/linux/of_dma.h
@@ -25,7 +25,6 @@ struct of_dma {
 	struct dma_chan		*(*of_dma_xlate)
 				(struct of_phandle_args *, struct of_dma *);
 	void			*of_dma_data;
-	int			use_count;
 };
 
 struct of_dma_filter_info {
@@ -38,9 +37,9 @@ extern int of_dma_controller_register(struct device_node *np,
 		struct dma_chan *(*of_dma_xlate)
 		(struct of_phandle_args *, struct of_dma *),
 		void *data);
-extern int of_dma_controller_free(struct device_node *np);
+extern void of_dma_controller_free(struct device_node *np);
 extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
-						     char *name);
+						     const char *name);
 extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
 		struct of_dma *ofdma);
 #else
@@ -52,13 +51,12 @@ static inline int of_dma_controller_register(struct device_node *np,
 	return -ENODEV;
 }
 
-static inline int of_dma_controller_free(struct device_node *np)
+static inline void of_dma_controller_free(struct device_node *np)
 {
-	return -ENODEV;
 }
 
 static inline struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
-						     char *name)
+						     const char *name)
 {
 	return NULL;
 }
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