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 * @ac97_slot_bits:	Enable bits for turning on the correct AC97 slot
20 */
21struct psc_dma_stream {
22	struct snd_pcm_runtime *runtime;
23	int active;
24	struct psc_dma *psc_dma;
25	struct bcom_task *bcom_task;
26	int irq;
27	struct snd_pcm_substream *stream;
28	int period_next;
29	int period_current;
30	int period_bytes;
31	int period_count;
32
33	/* AC97 state */
34	u32 ac97_slot_bits;
35};
36
37/**
38 * psc_dma - Private driver data
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 */
50struct psc_dma {
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;
56	spinlock_t lock;
57	struct mutex mutex;
58	u32 sicr;
59	uint sysclk;
60	int imr;
61	int id;
62	unsigned int slots;
63
64	/* per-stream data */
65	struct psc_dma_stream playback;
66	struct psc_dma_stream capture;
67
68	/* Statistics */
69	struct {
70		unsigned long overrun_count;
71		unsigned long underrun_count;
72	} stats;
73};
74
75/* Utility for retrieving psc_dma_stream structure from a substream */
76static inline struct psc_dma_stream *
77to_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
84int mpc5200_audio_dma_create(struct platform_device *op);
85int mpc5200_audio_dma_destroy(struct platform_device *op);
86
87#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */
88