[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>

1 files changed, 11 insertions, 3 deletions

diff --git a/include/asm-sh/dma.h b/include/asm-sh/dma.h
index 8e9436093ca..a118a0d4305 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 @@ 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