tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'dma' into devel

Browse Source 
Conflicts:

	arch/arm/plat-mxc/dma-mx1-mx2.c
This commit is contained in:
Russell King
2009-02-21 21:42:50 +00:00
committed by Russell King
parent 423145a5d4 fa4e998999
commit 22b61a11fd
13 changed files with 292 additions and 238 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm/include/asm/dma.h
+21 -25
View File
@@ -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 0xcc
#define DMA_MODE_MASK 3
#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
arch/arm/include/asm/mach/dma.h
+16 -19
View File
@@ -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);