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 8 #define PSC_STREAM_NAME_LEN 32 9 10 /** 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 20 */ 21 struct psc_dma_stream { 22 struct snd_pcm_runtime *runtime; 23 snd_pcm_uframes_t appl_ptr; 24 25 int active; 26 struct psc_dma *psc_dma; 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; 35 int period_size; 36 }; 37 38 /** 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 47 * with this value. 48 * @playback: Playback stream context data 49 * @capture: Capture stream context data 50 */ 51 struct 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 int mpc5200_audio_dma_create(struct of_device *op); 77 int mpc5200_audio_dma_destroy(struct of_device *op); 78 79 extern struct snd_soc_platform mpc5200_audio_dma_platform; 80 81 #endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */ 82