[deliverable/linux.git] / sound / soc / fsl / mpc5200_dma.h

/*
 * Freescale MPC5200 Audio DMA driver
 */

#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__
#define __SOUND_SOC_FSL_MPC5200_DMA_H__

#define PSC_STREAM_NAME_LEN 32

/**
 * psc_ac97_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_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 {
	struct snd_pcm_runtime *runtime;
	int active;
	struct psc_dma *psc_dma;
	struct bcom_task *bcom_task;
	int irq;
	struct snd_pcm_substream *stream;
	int period_next;
	int period_current;
	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;
	spinlock_t lock;
	struct mutex mutex;
	u32 sicr;
	uint sysclk;
	int imr;
	int id;
	unsigned int slots;

	/* per-stream data */
	struct psc_dma_stream playback;
	struct psc_dma_stream capture;

	/* Statistics */
	struct {
		unsigned long overrun_count;
		unsigned long underrun_count;
	} stats;
};

int mpc5200_audio_dma_create(struct of_device *op);
int mpc5200_audio_dma_destroy(struct of_device *op);

extern struct snd_soc_platform mpc5200_audio_dma_platform;

#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */
Commit	Line	Data
	1	/*
	2	* Freescale MPC5200 Audio DMA driver
	3	*/
	4
	5	#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__
	6	#define __SOUND_SOC_FSL_MPC5200_DMA_H__
	7
	8	#define PSC_STREAM_NAME_LEN 32
	9
	10	/**
	11	* psc_ac97_stream - Data specific to a single stream (playback or capture)
	12	* @active: flag indicating if the stream is active
	13	* @psc_dma: pointer back to parent psc_dma data structure
	14	* @bcom_task: bestcomm task structure
	15	* @irq: irq number for bestcomm task
	16	* @period_end: physical address of end of DMA region
	17	* @period_next_pt: physical address of next DMA buffer to enqueue
	18	* @period_bytes: size of DMA period in bytes
	19	*/
	20	struct psc_dma_stream {
	21	struct snd_pcm_runtime *runtime;
	22	int active;
	23	struct psc_dma *psc_dma;
	24	struct bcom_task *bcom_task;
	25	int irq;
	26	struct snd_pcm_substream *stream;
	27	int period_next;
	28	int period_current;
	29	int period_bytes;
	30	};
	31
	32	/**
	33	* psc_dma - Private driver data
	34	* @name: short name for this device ("PSC0", "PSC1", etc)
	35	* @psc_regs: pointer to the PSC's registers
	36	* @fifo_regs: pointer to the PSC's FIFO registers
	37	* @irq: IRQ of this PSC
	38	* @dev: struct device pointer
	39	* @dai: the CPU DAI for this device
	40	* @sicr: Base value used in serial interface control register; mode is ORed
	41	* with this value.
	42	* @playback: Playback stream context data
	43	* @capture: Capture stream context data
	44	*/
	45	struct psc_dma {
	46	char name[32];
	47	struct mpc52xx_psc __iomem *psc_regs;
	48	struct mpc52xx_psc_fifo __iomem *fifo_regs;
	49	unsigned int irq;
	50	struct device *dev;
	51	spinlock_t lock;
	52	struct mutex mutex;
	53	u32 sicr;
	54	uint sysclk;
	55	int imr;
	56	int id;
	57	unsigned int slots;
	58
	59	/* per-stream data */
	60	struct psc_dma_stream playback;
	61	struct psc_dma_stream capture;
	62
	63	/* Statistics */
	64	struct {
	65	unsigned long overrun_count;
	66	unsigned long underrun_count;
	67	} stats;
	68	};
	69
	70	int mpc5200_audio_dma_create(struct of_device *op);
	71	int mpc5200_audio_dma_destroy(struct of_device *op);
	72
	73	extern struct snd_soc_platform mpc5200_audio_dma_platform;
	74
	75	#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */