[PATCH] sh: DMA updates
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>
diff --git a/include/asm-sh/dma.h b/include/asm-sh/dma.h
index 8e94360..a118a0d4 100644
--- a/include/asm-sh/dma.h
+++ b/include/asm-sh/dma.h
@@ -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 @@
* 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_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_info {
+ struct platform_device *pdev;
+
const char *name;
unsigned int nr_channels;
unsigned long flags;
@@ -130,7 +134,11 @@
#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
