Gitiles
Code Review Sign In
gerrit-public.fairphone.software / kernel / msm-4.9 / d56b6eb6df7f6fb92383a52d640e27f71e6262d0 / . / sound / soc / fsl / mpc5200_dma.h
blob: d9c741bf9ab65583e9b4ffd6ce71a4aa3638fd96 [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
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]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 */
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]20struct psc_dma_stream {
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]21 struct snd_pcm_runtime *runtime;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]22 int active;
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]23 struct psc_dma *psc_dma;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]24 struct bcom_task *bcom_task;
25 int irq;
26 struct snd_pcm_substream *stream;
Grant Likely8f159d72009-11-07 01:33:53 -0700[diff] [blame]27 int period_next;
28 int period_current;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]29 int period_bytes;
30};
31
32/**
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]33 * psc_dma - Private driver data
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]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 */
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]45struct psc_dma {
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]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;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]51 spinlock_t lock;
Grant Likely0827d6b2009-07-02 11:57:25 -0600[diff] [blame]52 struct mutex mutex;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]53 u32 sicr;
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]54 uint sysclk;
55 int imr;
56 int id;
57 unsigned int slots;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]58
59 /* per-stream data */
Jon Smirlcebe7762009-05-23 19:13:01 -0400[diff] [blame]60 struct psc_dma_stream playback;
61 struct psc_dma_stream capture;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]62
63 /* Statistics */
64 struct {
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]65 unsigned long overrun_count;
66 unsigned long underrun_count;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]67 } stats;
68};
69
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]70int mpc5200_audio_dma_create(struct of_device *op);
71int mpc5200_audio_dma_destroy(struct of_device *op);
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]72
Jon Smirldbcc3472009-05-26 08:34:08 -0400[diff] [blame]73extern struct snd_soc_platform mpc5200_audio_dma_platform;
Jon Smirl89dd0842009-05-23 19:12:59 -0400[diff] [blame]74
75#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */