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/*
* Definitions shared between dma-sa1100.c and dma-sa1111.c
* (C) 2000 Nicolas Pitre <nico@cam.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/config.h>
/*
* DMA buffer structure
*/
typedef struct dma_buf_s {
int size; /* buffer size */
dma_addr_t dma_start; /* starting DMA address */
dma_addr_t dma_ptr; /* next DMA pointer to use */
int ref; /* number of DMA references */
void *id; /* to identify buffer from outside */
struct dma_buf_s *next; /* next buffer to process */
} dma_buf_t;
/*
* DMA channel structure.
*/
typedef struct {
unsigned int in_use; /* Device is allocated */
const char *device_id; /* Device name */
dma_device_t device; /* ... to which this channel is attached */
dma_buf_t *head; /* where to insert buffers */
dma_buf_t *tail; /* where to remove buffers */
dma_buf_t *curr; /* buffer currently DMA'ed */
int stopped; /* 1 if DMA is stalled */
dma_regs_t *regs; /* points to appropriate DMA registers */
int irq; /* IRQ used by the channel */
dma_callback_t callback; /* ... to call when buffers are done */
int spin_size; /* > 0 when DMA should spin when no more buffer */
dma_addr_t spin_addr; /* DMA address to spin onto */
int spin_ref; /* number of spinning references */
#ifdef CONFIG_SA1111
int dma_a, dma_b, last_dma; /* SA-1111 specific */
#endif
} sa1100_dma_t;
extern sa1100_dma_t dma_chan[MAX_SA1100_DMA_CHANNELS];
int start_sa1111_sac_dma(sa1100_dma_t *dma, dma_addr_t dma_ptr, size_t size);
int sa1111_dma_get_current(dmach_t channel, void **buf_id, dma_addr_t *addr);
int sa1111_dma_stop(dmach_t channel);
int sa1111_dma_resume(dmach_t channel);
void sa1111_reset_sac_dma(dmach_t channel);
void sa1111_cleanup_sac_dma(dmach_t channel);
void sa1100_dma_done (sa1100_dma_t *dma);
#ifdef CONFIG_SA1111
#define channel_is_sa1111_sac(ch) \
((ch) >= SA1111_SAC_DMA_BASE && \
(ch) < SA1111_SAC_DMA_BASE + SA1111_SAC_DMA_CHANNELS)
#else
#define channel_is_sa1111_sac(ch) (0)
#endif
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