2 * Freescale MPC5200 Audio DMA driver
5 #ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__
6 #define __SOUND_SOC_FSL_MPC5200_DMA_H__
8 #define PSC_STREAM_NAME_LEN 32
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_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
21 struct psc_dma_stream
{
22 struct snd_pcm_runtime
*runtime
;
23 snd_pcm_uframes_t appl_ptr
;
26 struct psc_dma
*psc_dma
;
27 struct bcom_task
*bcom_task
;
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
;
39 * psc_dma - Private driver data
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
48 * @playback: Playback stream context data
49 * @capture: Capture stream context data
53 struct mpc52xx_psc __iomem
*psc_regs
;
54 struct mpc52xx_psc_fifo __iomem
*fifo_regs
;
66 struct psc_dma_stream playback
;
67 struct psc_dma_stream capture
;
71 unsigned long overrun_count
;
72 unsigned long underrun_count
;
76 int mpc5200_audio_dma_create(struct of_device
*op
);
77 int mpc5200_audio_dma_destroy(struct of_device
*op
);
79 extern struct snd_soc_platform mpc5200_audio_dma_platform
;
81 #endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */