/*
* include/asm-sh/dma.h
*
- * Copyright (C) 2003 Paul Mundt
+ * Copyright (C) 2003, 2004 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
#include <linux/config.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
+#include <linux/sysdev.h>
#include <asm/cpu/dma.h>
#include <asm/semaphore.h>
# define MAX_DMA_CHANNELS (CONFIG_NR_ONCHIP_DMA_CHANNELS)
#endif
-/*
+/*
* Read and write modes can mean drastically different things depending on the
* channel configuration. Consult your DMAC documentation and module
* implementation for further clues.
#define DMA_MODE_WRITE 0x01
#define DMA_MODE_MASK 0x01
+#define DMA_AUTOINIT 0x10
+
+/*
+ * DMAC (dma_info) flags
+ */
+enum {
+ DMAC_CHANNELS_CONFIGURED = 0x00,
+ DMAC_CHANNELS_TEI_CAPABLE = 0x01,
+};
+
+/*
+ * DMA channel capabilities / flags
+ */
+enum {
+ DMA_CONFIGURED = 0x00,
+ DMA_TEI_CAPABLE = 0x01,
+};
+
extern spinlock_t dma_spin_lock;
-struct dma_info;
+struct dma_channel;
struct dma_ops {
- const char *name;
-
- int (*request)(struct dma_info *info);
- void (*free)(struct dma_info *info);
+ int (*request)(struct dma_channel *chan);
+ void (*free)(struct dma_channel *chan);
- int (*get_residue)(struct dma_info *info);
- int (*xfer)(struct dma_info *info);
- void (*configure)(struct dma_info *info, unsigned long flags);
+ int (*get_residue)(struct dma_channel *chan);
+ int (*xfer)(struct dma_channel *chan);
+ void (*configure)(struct dma_channel *chan, unsigned long flags);
};
-struct dma_info {
- const char *dev_id;
+struct dma_channel {
+ char dev_id[16];
unsigned int chan;
unsigned int mode;
unsigned int count;
-
+
unsigned long sar;
unsigned long dar;
- unsigned int configured:1;
- unsigned int tei_capable:1;
+ unsigned long flags;
atomic_t busy;
struct semaphore sem;
wait_queue_head_t wait_queue;
+
+ struct sys_device dev;
+};
+
+struct dma_info {
+ const char *name;
+ unsigned int nr_channels;
+ unsigned long flags;
+
struct dma_ops *ops;
+ struct dma_channel *channels;
+
+ struct list_head list;
};
+#define to_dma_channel(channel) container_of(channel, struct dma_channel, dev)
+
/* arch/sh/drivers/dma/dma-api.c */
extern int dma_xfer(unsigned int chan, unsigned long from,
unsigned long to, size_t size, unsigned int mode);
extern void free_dma(unsigned int chan);
extern int get_dma_residue(unsigned int chan);
extern struct dma_info *get_dma_info(unsigned int chan);
+extern struct dma_channel *get_dma_channel(unsigned int chan);
extern void dma_wait_for_completion(unsigned int chan);
extern void dma_configure_channel(unsigned int chan, unsigned long flags);
-extern int register_dmac(struct dma_ops *ops);
+extern int register_dmac(struct dma_info *info);
+extern void unregister_dmac(struct dma_info *info);
-extern struct dma_info dma_info[];
+#ifdef CONFIG_SYSFS
+/* arch/sh/drivers/dma/dma-sysfs.c */
+extern int dma_create_sysfs_files(struct dma_channel *);
+#endif
#ifdef CONFIG_PCI
extern int isa_dma_bridge_buggy;
#else
-#define isa_dma_bridge_buggy (0)
+#define isa_dma_bridge_buggy (0)
#endif
#endif /* __ASM_SH_DMA_H */