[net-next-2.6.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
 * @ac97_slot_bits:	Enable bits for turning on the correct AC97 slot
 */
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;
	int period_count;

	/* AC97 state */
	u32 ac97_slot_bits;
};

/**
 * 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;
};

/* Utility for retrieving psc_dma_stream structure from a substream */
static inline struct psc_dma_stream *
to_psc_dma_stream(struct snd_pcm_substream *substream, struct psc_dma *psc_dma)
{
	if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
		return &psc_dma->capture;
	return &psc_dma->playback;
}

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
89dd0842 JS	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
dbcc3475 JS	8	#define PSC_STREAM_NAME_LEN 32
dbcc3475 JS	9
89dd0842	10	/**
dbcc3475	11	* psc_ac97_stream - Data specific to a single stream (playback or capture)
89dd0842	12	* @active: flag indicating if the stream is active
cebe7767	13	* @psc_dma: pointer back to parent psc_dma data structure
89dd0842 JS	14	* @bcom_task: bestcomm task structure
89dd0842 JS	15	* @irq: irq number for bestcomm task
89dd0842 JS	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
c939e5c8	19	* @ac97_slot_bits: Enable bits for turning on the correct AC97 slot
89dd0842	20	*/
cebe7767	21	struct psc_dma_stream {
dbcc3475	22	struct snd_pcm_runtime *runtime;
89dd0842	23	int active;
cebe7767	24	struct psc_dma *psc_dma;
89dd0842 JS	25	struct bcom_task *bcom_task;
	26	int irq;
	27	struct snd_pcm_substream *stream;
8f159d72 GL	28	int period_next;
8f159d72 GL	29	int period_current;
89dd0842	30	int period_bytes;
c4878274	31	int period_count;
c939e5c8 GL	32
	33	/* AC97 state */
	34	u32 ac97_slot_bits;
89dd0842 JS	35	};
	36
	37	/**
cebe7767	38	* psc_dma - Private driver data
89dd0842 JS	39	* @name: short name for this device ("PSC0", "PSC1", etc)
	40	* @psc_regs: pointer to the PSC's registers
	41	* @fifo_regs: pointer to the PSC's FIFO registers
	42	* @irq: IRQ of this PSC
	43	* @dev: struct device pointer
	44	* @dai: the CPU DAI for this device
	45	* @sicr: Base value used in serial interface control register; mode is ORed
	46	* with this value.
	47	* @playback: Playback stream context data
	48	* @capture: Capture stream context data
	49	*/
cebe7767	50	struct psc_dma {
89dd0842 JS	51	char name[32];
	52	struct mpc52xx_psc __iomem *psc_regs;
	53	struct mpc52xx_psc_fifo __iomem *fifo_regs;
	54	unsigned int irq;
	55	struct device *dev;
89dd0842	56	spinlock_t lock;
0827d6ba	57	struct mutex mutex;
89dd0842	58	u32 sicr;
dbcc3475 JS	59	uint sysclk;
	60	int imr;
	61	int id;
	62	unsigned int slots;
89dd0842 JS	63
89dd0842 JS	64	/* per-stream data */
cebe7767 JS	65	struct psc_dma_stream playback;
cebe7767 JS	66	struct psc_dma_stream capture;
89dd0842 JS	67
	68	/* Statistics */
	69	struct {
dbcc3475 JS	70	unsigned long overrun_count;
dbcc3475 JS	71	unsigned long underrun_count;
89dd0842 JS	72	} stats;
	73	};
	74
1d8222e8	75	/* Utility for retrieving psc_dma_stream structure from a substream */
f487537c	76	static inline struct psc_dma_stream *
1d8222e8 GL	77	to_psc_dma_stream(struct snd_pcm_substream substream, struct psc_dma psc_dma)
	78	{
	79	if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
	80	return &psc_dma->capture;
	81	return &psc_dma->playback;
	82	}
	83
dbcc3475 JS	84	int mpc5200_audio_dma_create(struct of_device *op);
dbcc3475 JS	85	int mpc5200_audio_dma_destroy(struct of_device *op);
89dd0842	86
dbcc3475	87	extern struct snd_soc_platform mpc5200_audio_dma_platform;
89dd0842 JS	88
89dd0842 JS	89	#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */