Merge branch 'dma' into devel

Conflicts:

	arch/arm/plat-mxc/dma-mx1-mx2.c

2 files changed, 37 insertions, 44 deletions

diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h
index df5638f..7edf353 100644
--- a/arch/arm/include/asm/dma.h
+++ b/arch/arm/include/asm/dma.h
@@ -19,21 +19,17 @@
 #include <asm/system.h>
 #include <asm/scatterlist.h>
 
-typedef unsigned int dmach_t;
-
 #include <mach/isa-dma.h>
 
 /*
- * DMA modes
+ * The DMA modes reflect the settings for the ISA DMA controller
  */
-typedef unsigned int dmamode_t;
-
-#define DMA_MODE_MASK	3
+#define DMA_MODE_MASK	 0xcc
 
-#define DMA_MODE_READ	 0
-#define DMA_MODE_WRITE	 1
-#define DMA_MODE_CASCADE 2
-#define DMA_AUTOINIT	 4
+#define DMA_MODE_READ	 0x44
+#define DMA_MODE_WRITE	 0x48
+#define DMA_MODE_CASCADE 0xc0
+#define DMA_AUTOINIT	 0x10
 
 extern spinlock_t  dma_spin_lock;
 
@@ -52,44 +48,44 @@ static inline void release_dma_lock(unsigned long flags)
 /* Clear the 'DMA Pointer Flip Flop'.
  * Write 0 for LSB/MSB, 1 for MSB/LSB access.
  */
-#define clear_dma_ff(channel)
+#define clear_dma_ff(chan)
 
 /* Set only the page register bits of the transfer address.
  *
  * NOTE: This is an architecture specific function, and should
  *       be hidden from the drivers
  */
-extern void set_dma_page(dmach_t channel, char pagenr);
+extern void set_dma_page(unsigned int chan, char pagenr);
 
 /* Request a DMA channel
  *
  * Some architectures may need to do allocate an interrupt
  */
-extern int  request_dma(dmach_t channel, const char * device_id);
+extern int  request_dma(unsigned int chan, const char * device_id);
 
 /* Free a DMA channel
  *
  * Some architectures may need to do free an interrupt
  */
-extern void free_dma(dmach_t channel);
+extern void free_dma(unsigned int chan);
 
 /* Enable DMA for this channel
  *
  * On some architectures, this may have other side effects like
  * enabling an interrupt and setting the DMA registers.
  */
-extern void enable_dma(dmach_t channel);
+extern void enable_dma(unsigned int chan);
 
 /* Disable DMA for this channel
  *
  * On some architectures, this may have other side effects like
  * disabling an interrupt or whatever.
  */
-extern void disable_dma(dmach_t channel);
+extern void disable_dma(unsigned int chan);
 
 /* Test whether the specified channel has an active DMA transfer
  */
-extern int dma_channel_active(dmach_t channel);
+extern int dma_channel_active(unsigned int chan);
 
 /* Set the DMA scatter gather list for this channel
  *
@@ -97,7 +93,7 @@ extern int dma_channel_active(dmach_t channel);
  * especially since some DMA architectures don't update the
  * DMA address immediately, but defer it to the enable_dma().
  */
-extern void set_dma_sg(dmach_t channel, struct scatterlist *sg, int nr_sg);
+extern void set_dma_sg(unsigned int chan, struct scatterlist *sg, int nr_sg);
 
 /* Set the DMA address for this channel
  *
@@ -105,9 +101,9 @@ extern void set_dma_sg(dmach_t channel, struct scatterlist *sg, int nr_sg);
  * especially since some DMA architectures don't update the
  * DMA address immediately, but defer it to the enable_dma().
  */
-extern void __set_dma_addr(dmach_t channel, void *addr);
-#define set_dma_addr(channel, addr)				\
-	__set_dma_addr(channel, bus_to_virt(addr))
+extern void __set_dma_addr(unsigned int chan, void *addr);
+#define set_dma_addr(chan, addr)				\
+	__set_dma_addr(chan, bus_to_virt(addr))
 
 /* Set the DMA byte count for this channel
  *
@@ -115,7 +111,7 @@ extern void __set_dma_addr(dmach_t channel, void *addr);
  * especially since some DMA architectures don't update the
  * DMA count immediately, but defer it to the enable_dma().
  */
-extern void set_dma_count(dmach_t channel, unsigned long count);
+extern void set_dma_count(unsigned int chan, unsigned long count);
 
 /* Set the transfer direction for this channel
  *
@@ -124,11 +120,11 @@ extern void set_dma_count(dmach_t channel, unsigned long count);
  * DMA transfer direction immediately, but defer it to the
  * enable_dma().
  */
-extern void set_dma_mode(dmach_t channel, dmamode_t mode);
+extern void set_dma_mode(unsigned int chan, unsigned int mode);
 
 /* Set the transfer speed for this channel
  */
-extern void set_dma_speed(dmach_t channel, int cycle_ns);
+extern void set_dma_speed(unsigned int chan, int cycle_ns);
 
 /* Get DMA residue count. After a DMA transfer, this
  * should return zero. Reading this while a DMA transfer is
@@ -136,7 +132,7 @@ extern void set_dma_speed(dmach_t channel, int cycle_ns);
  * If called before the channel has been used, it may return 1.
  * Otherwise, it returns the number of _bytes_ left to transfer.
  */
-extern int  get_dma_residue(dmach_t channel);
+extern int  get_dma_residue(unsigned int chan);
 
 #ifndef NO_DMA
 #define NO_DMA	255
diff --git a/arch/arm/include/asm/mach/dma.h b/arch/arm/include/asm/mach/dma.h
index fc7278e..9e614a1 100644
--- a/arch/arm/include/asm/mach/dma.h
+++ b/arch/arm/include/asm/mach/dma.h
@@ -15,13 +15,13 @@ struct dma_struct;
 typedef struct dma_struct dma_t;
 
 struct dma_ops {
-	int	(*request)(dmach_t, dma_t *);		/* optional */
-	void	(*free)(dmach_t, dma_t *);		/* optional */
-	void	(*enable)(dmach_t, dma_t *);		/* mandatory */
-	void 	(*disable)(dmach_t, dma_t *);		/* mandatory */
-	int	(*residue)(dmach_t, dma_t *);		/* optional */
-	int	(*setspeed)(dmach_t, dma_t *, int);	/* optional */
-	char	*type;
+	int	(*request)(unsigned int, dma_t *);		/* optional */
+	void	(*free)(unsigned int, dma_t *);			/* optional */
+	void	(*enable)(unsigned int, dma_t *);		/* mandatory */
+	void 	(*disable)(unsigned int, dma_t *);		/* mandatory */
+	int	(*residue)(unsigned int, dma_t *);		/* optional */
+	int	(*setspeed)(unsigned int, dma_t *, int);	/* optional */
+	const char *type;
 };
 
 struct dma_struct {
@@ -34,24 +34,21 @@ struct dma_struct {
 	unsigned int	active:1;	/* Transfer active		*/
 	unsigned int	invalid:1;	/* Address/Count changed	*/
 
-	dmamode_t	dma_mode;	/* DMA mode			*/
+	unsigned int	dma_mode;	/* DMA mode			*/
 	int		speed;		/* DMA speed			*/
 
 	unsigned int	lock;		/* Device is allocated		*/
 	const char	*device_id;	/* Device name			*/
 
-	unsigned int	dma_base;	/* Controller base address	*/
-	int		dma_irq;	/* Controller IRQ		*/
-	struct scatterlist cur_sg;	/* Current controller buffer	*/
-	unsigned int	state;
-
-	struct dma_ops	*d_ops;
+	const struct dma_ops *d_ops;
 };
 
-/* Prototype: void arch_dma_init(dma)
- * Purpose  : Initialise architecture specific DMA
- * Params   : dma - pointer to array of DMA structures
+/*
+ * isa_dma_add - add an ISA-style DMA channel
  */
-extern void arch_dma_init(dma_t *dma);
+extern int isa_dma_add(unsigned int, dma_t *dma);
 
-extern void isa_init_dma(dma_t *dma);
+/*
+ * Add the ISA DMA controller.  Always takes channels 0-7.
+ */
+extern void isa_init_dma(void);