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/*
* Freescale MPC5200 Audio DMA driver
*/
#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__
#define __SOUND_SOC_FSL_MPC5200_DMA_H__
/**
* psc_dma_stream - Data specific to a single stream (playback or capture)
* @active: flag indicating if the stream is active
* @psc_dma: pointer back to parent psc_dma data structure
* @bcom_task: bestcomm task structure
* @irq: irq number for bestcomm task
* @period_start: physical address of start of DMA region
* @period_end: physical address of end of DMA region
* @period_next_pt: physical address of next DMA buffer to enqueue
* @period_bytes: size of DMA period in bytes
*/
struct psc_dma_stream {
int active;
struct psc_dma *psc_dma;
struct bcom_task *bcom_task;
int irq;
struct snd_pcm_substream *stream;
dma_addr_t period_start;
dma_addr_t period_end;
dma_addr_t period_next_pt;
dma_addr_t period_current_pt;
int period_bytes;
};
/**
* psc_dma - Private driver data
* @name: short name for this device ("PSC0", "PSC1", etc)
* @psc_regs: pointer to the PSC's registers
* @fifo_regs: pointer to the PSC's FIFO registers
* @irq: IRQ of this PSC
* @dev: struct device pointer
* @dai: the CPU DAI for this device
* @sicr: Base value used in serial interface control register; mode is ORed
* with this value.
* @playback: Playback stream context data
* @capture: Capture stream context data
*/
struct psc_dma {
char name[32];
struct mpc52xx_psc __iomem *psc_regs;
struct mpc52xx_psc_fifo __iomem *fifo_regs;
unsigned int irq;
struct device *dev;
struct snd_soc_dai dai;
spinlock_t lock;
u32 sicr;
/* per-stream data */
struct psc_dma_stream playback;
struct psc_dma_stream capture;
/* Statistics */
struct {
int overrun_count;
int underrun_count;
} stats;
};
int psc_dma_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai);
int psc_dma_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai);
void psc_dma_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai);
int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai);
extern struct snd_soc_platform psc_dma_pcm_soc_platform;
#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */
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