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[PATCH] sh: DMA updates

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This extends the current SH DMA API somewhat to support a proper virtual
channel abstraction, and also works to represent this through the driver model
by giving each DMAC its own platform device.

There's also a few other minor changes to support a few new CPU subtypes, and
make TEI generation for the SH DMAC configurable.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paul Mundt
2006-01-16 22:14:09 -08:00
committed by Linus Torvalds
parent 0025835cf2
commit 0d831770b1
13 changed files with 293 additions and 122 deletions
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14
include/asm-sh/dma.h
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@@ -15,6 +15,7 @@
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/sysdev.h>
#include <linux/device.h>
#include <asm/cpu/dma.h>
#include <asm/semaphore.h>
@@ -54,8 +55,8 @@ enum {
* DMA channel capabilities / flags
*/
enum {
DMA_CONFIGURED = 0x00,
DMA_TEI_CAPABLE = 0x01,
DMA_CONFIGURED = 0x02,
};
extern spinlock_t dma_spin_lock;
@@ -74,7 +75,8 @@ struct dma_ops {
struct dma_channel {
char dev_id[16];
unsigned int chan;
unsigned int chan; /* Physical channel number */
unsigned int vchan; /* Virtual channel number */
unsigned int mode;
unsigned int count;
@@ -91,6 +93,8 @@ struct dma_channel {
};
struct dma_info {
struct platform_device *pdev;
const char *name;
unsigned int nr_channels;
unsigned long flags;
@@ -130,7 +134,11 @@ extern void unregister_dmac(struct dma_info *info);
#ifdef CONFIG_SYSFS
/* arch/sh/drivers/dma/dma-sysfs.c */
extern int dma_create_sysfs_files(struct dma_channel *);
extern int dma_create_sysfs_files(struct dma_channel *, struct dma_info *);
extern void dma_remove_sysfs_files(struct dma_channel *, struct dma_info *);
#else
#define dma_create_sysfs_file(channel, info) do { } while (0)
#define dma_remove_sysfs_file(channel, info) do { } while (0)
#endif
#ifdef CONFIG_PCI