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Commit | Line | Data |
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89dd0842 JS |
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 | ||
dbcc3475 JS |
8 | #define PSC_STREAM_NAME_LEN 32 |
9 | ||
89dd0842 | 10 | /** |
dbcc3475 | 11 | * psc_ac97_stream - Data specific to a single stream (playback or capture) |
89dd0842 | 12 | * @active: flag indicating if the stream is active |
cebe7767 | 13 | * @psc_dma: pointer back to parent psc_dma data structure |
89dd0842 JS |
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 | */ | |
cebe7767 | 21 | struct psc_dma_stream { |
dbcc3475 JS |
22 | struct snd_pcm_runtime *runtime; |
23 | snd_pcm_uframes_t appl_ptr; | |
24 | ||
89dd0842 | 25 | int active; |
cebe7767 | 26 | struct psc_dma *psc_dma; |
89dd0842 JS |
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; | |
dbcc3475 | 35 | int period_size; |
89dd0842 JS |
36 | }; |
37 | ||
38 | /** | |
cebe7767 | 39 | * psc_dma - Private driver data |
89dd0842 JS |
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 | */ | |
cebe7767 | 51 | struct psc_dma { |
89dd0842 JS |
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; | |
89dd0842 JS |
57 | spinlock_t lock; |
58 | u32 sicr; | |
dbcc3475 JS |
59 | uint sysclk; |
60 | int imr; | |
61 | int id; | |
62 | unsigned int slots; | |
89dd0842 JS |
63 | |
64 | /* per-stream data */ | |
cebe7767 JS |
65 | struct psc_dma_stream playback; |
66 | struct psc_dma_stream capture; | |
89dd0842 JS |
67 | |
68 | /* Statistics */ | |
69 | struct { | |
dbcc3475 JS |
70 | unsigned long overrun_count; |
71 | unsigned long underrun_count; | |
89dd0842 JS |
72 | } stats; |
73 | }; | |
74 | ||
dbcc3475 JS |
75 | int mpc5200_audio_dma_create(struct of_device *op); |
76 | int mpc5200_audio_dma_destroy(struct of_device *op); | |
89dd0842 | 77 | |
dbcc3475 | 78 | extern struct snd_soc_platform mpc5200_audio_dma_platform; |
89dd0842 JS |
79 | |
80 | #endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */ |