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review.shift-gmbh.com / SHIFTPHONES / kernel / common / 4cae37fa98f4d50778161ec033122444e3c10a01 / . / sound / soc / fsl / mpc5200_dma.h
blob: 8d396bb9d9fe405db9c10dc12d14e2dedabfaf58 [file] [log] [blame]
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]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
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]8#define PSC_STREAM_NAME_LEN 32
9
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]10/**
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]11 * psc_ac97_stream - Data specific to a single stream (playback or capture)
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]12 * @active: flag indicating if the stream is active
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]13 * @psc_dma: pointer back to parent psc_dma data structure
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]14 * @bcom_task: bestcomm task structure
15 * @irq: irq number for bestcomm task
16 * @period_start: physical address of start of DMA region
17 * @period_end: physical address of end of DMA region
18 * @period_next_pt: physical address of next DMA buffer to enqueue
19 * @period_bytes: size of DMA period in bytes
20 */
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]21struct psc_dma_stream {
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]22 struct snd_pcm_runtime *runtime;
23 snd_pcm_uframes_t appl_ptr;
24
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]25 int active;
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]26 struct psc_dma *psc_dma;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]27 struct bcom_task *bcom_task;
28 int irq;
29 struct snd_pcm_substream *stream;
30 dma_addr_t period_start;
31 dma_addr_t period_end;
32 dma_addr_t period_next_pt;
33 dma_addr_t period_current_pt;
34 int period_bytes;
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]35 int period_size;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]36};
37
38/**
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]39 * psc_dma - Private driver data
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]40 * @name: short name for this device ("PSC0", "PSC1", etc)
41 * @psc_regs: pointer to the PSC's registers
42 * @fifo_regs: pointer to the PSC's FIFO registers
43 * @irq: IRQ of this PSC
44 * @dev: struct device pointer
45 * @dai: the CPU DAI for this device
46 * @sicr: Base value used in serial interface control register; mode is ORed
47 * with this value.
48 * @playback: Playback stream context data
49 * @capture: Capture stream context data
50 */
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]51struct psc_dma {
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]52 char name[32];
53 struct mpc52xx_psc __iomem *psc_regs;
54 struct mpc52xx_psc_fifo __iomem *fifo_regs;
55 unsigned int irq;
56 struct device *dev;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]57 spinlock_t lock;
Grant Likely0827d6b2009-07-02 11:57:25 -0600[diff] [blame]58 struct mutex mutex;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]59 u32 sicr;
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]60 uint sysclk;
61 int imr;
62 int id;
63 unsigned int slots;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]64
65 /* per-stream data */
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]66 struct psc_dma_stream playback;
67 struct psc_dma_stream capture;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]68
69 /* Statistics */
70 struct {
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]71 unsigned long overrun_count;
72 unsigned long underrun_count;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]73 } stats;
74};
75
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]76int mpc5200_audio_dma_create(struct of_device *op);
77int mpc5200_audio_dma_destroy(struct of_device *op);
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]78
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]79extern struct snd_soc_platform mpc5200_audio_dma_platform;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]80
81#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */