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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Freescale MPC5200 Audio DMA driver4 */5 6#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__7#define __SOUND_SOC_FSL_MPC5200_DMA_H__8 9#define PSC_STREAM_NAME_LEN 3210 11/**12 * psc_ac97_stream - Data specific to a single stream (playback or capture)13 * @active: flag indicating if the stream is active14 * @psc_dma: pointer back to parent psc_dma data structure15 * @bcom_task: bestcomm task structure16 * @irq: irq number for bestcomm task17 * @period_end: physical address of end of DMA region18 * @period_next_pt: physical address of next DMA buffer to enqueue19 * @period_bytes: size of DMA period in bytes20 * @ac97_slot_bits: Enable bits for turning on the correct AC97 slot21 */22struct psc_dma_stream {23 struct snd_pcm_runtime *runtime;24 int active;25 struct psc_dma *psc_dma;26 struct bcom_task *bcom_task;27 int irq;28 struct snd_pcm_substream *stream;29 int period_next;30 int period_current;31 int period_bytes;32 int period_count;33 34 /* AC97 state */35 u32 ac97_slot_bits;36};37 38/**39 * psc_dma - Private driver data40 * @name: short name for this device ("PSC0", "PSC1", etc)41 * @psc_regs: pointer to the PSC's registers42 * @fifo_regs: pointer to the PSC's FIFO registers43 * @irq: IRQ of this PSC44 * @dev: struct device pointer45 * @dai: the CPU DAI for this device46 * @sicr: Base value used in serial interface control register; mode is ORed47 * with this value.48 * @playback: Playback stream context data49 * @capture: Capture stream context data50 */51struct psc_dma {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;57 spinlock_t lock;58 struct mutex mutex;59 u32 sicr;60 uint sysclk;61 int imr;62 int id;63 unsigned int slots;64 65 /* per-stream data */66 struct psc_dma_stream playback;67 struct psc_dma_stream capture;68 69 /* Statistics */70 struct {71 unsigned long overrun_count;72 unsigned long underrun_count;73 } stats;74};75 76/* Utility for retrieving psc_dma_stream structure from a substream */77static inline struct psc_dma_stream *78to_psc_dma_stream(struct snd_pcm_substream *substream, struct psc_dma *psc_dma)79{80 if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)81 return &psc_dma->capture;82 return &psc_dma->playback;83}84 85int mpc5200_audio_dma_create(struct platform_device *op);86int mpc5200_audio_dma_destroy(struct platform_device *op);87 88#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */89