Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / fsl / mpc5200_dma.h

diff --git a/kernel/sound/soc/fsl/mpc5200_dma.h b/kernel/sound/soc/fsl/mpc5200_dma.h
new file mode 100644 (file)
index 0000000..dff253f
--- /dev/null
+++ b/kernel/sound/soc/fsl/mpc5200_dma.h
@@ -0,0 +1,87 @@
+/*
+ * Freescale MPC5200 Audio DMA driver
+ */
+
+#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__
+#define __SOUND_SOC_FSL_MPC5200_DMA_H__
+
+#define PSC_STREAM_NAME_LEN 32
+
+/**
+ * psc_ac97_stream - Data specific to a single stream (playback or capture)
+ * @active:            flag indicating if the stream is active
+ * @psc_dma:           pointer back to parent psc_dma data structure
+ * @bcom_task:         bestcomm task structure
+ * @irq:               irq number for bestcomm task
+ * @period_end:                physical address of end of DMA region
+ * @period_next_pt:    physical address of next DMA buffer to enqueue
+ * @period_bytes:      size of DMA period in bytes
+ * @ac97_slot_bits:    Enable bits for turning on the correct AC97 slot
+ */
+struct psc_dma_stream {
+       struct snd_pcm_runtime *runtime;
+       int active;
+       struct psc_dma *psc_dma;
+       struct bcom_task *bcom_task;
+       int irq;
+       struct snd_pcm_substream *stream;
+       int period_next;
+       int period_current;
+       int period_bytes;
+       int period_count;
+
+       /* AC97 state */
+       u32 ac97_slot_bits;
+};
+
+/**
+ * psc_dma - Private driver data
+ * @name: short name for this device ("PSC0", "PSC1", etc)
+ * @psc_regs: pointer to the PSC's registers
+ * @fifo_regs: pointer to the PSC's FIFO registers
+ * @irq: IRQ of this PSC
+ * @dev: struct device pointer
+ * @dai: the CPU DAI for this device
+ * @sicr: Base value used in serial interface control register; mode is ORed
+ *        with this value.
+ * @playback: Playback stream context data
+ * @capture: Capture stream context data
+ */
+struct psc_dma {
+       char name[32];
+       struct mpc52xx_psc __iomem *psc_regs;
+       struct mpc52xx_psc_fifo __iomem *fifo_regs;
+       unsigned int irq;
+       struct device *dev;
+       spinlock_t lock;
+       struct mutex mutex;
+       u32 sicr;
+       uint sysclk;
+       int imr;
+       int id;
+       unsigned int slots;
+
+       /* per-stream data */
+       struct psc_dma_stream playback;
+       struct psc_dma_stream capture;
+
+       /* Statistics */
+       struct {
+               unsigned long overrun_count;
+               unsigned long underrun_count;
+       } stats;
+};
+
+/* Utility for retrieving psc_dma_stream structure from a substream */
+static inline struct psc_dma_stream *
+to_psc_dma_stream(struct snd_pcm_substream *substream, struct psc_dma *psc_dma)
+{
+       if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
+               return &psc_dma->capture;
+       return &psc_dma->playback;
+}
+
+int mpc5200_audio_dma_create(struct platform_device *op);
+int mpc5200_audio_dma_destroy(struct platform_device *op);
+
+#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */