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Diffstat (limited to 'sound/soc/fsl/mpc5200_dma.h')
-rw-r--r--sound/soc/fsl/mpc5200_dma.h80
1 files changed, 80 insertions, 0 deletions
diff --git a/sound/soc/fsl/mpc5200_dma.h b/sound/soc/fsl/mpc5200_dma.h
new file mode 100644
index 000000000000..2000803f06a7
--- /dev/null
+++ b/sound/soc/fsl/mpc5200_dma.h
@@ -0,0 +1,80 @@
+/*
+ * 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_start: physical address of start of DMA region
+ * @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
+ */
+struct psc_dma_stream {
+ struct snd_pcm_runtime *runtime;
+ snd_pcm_uframes_t appl_ptr;
+
+ int active;
+ struct psc_dma *psc_dma;
+ struct bcom_task *bcom_task;
+ int irq;
+ struct snd_pcm_substream *stream;
+ dma_addr_t period_start;
+ dma_addr_t period_end;
+ dma_addr_t period_next_pt;
+ dma_addr_t period_current_pt;
+ int period_bytes;
+ int period_size;
+};
+
+/**
+ * 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;
+ 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;
+};
+
+int mpc5200_audio_dma_create(struct of_device *op);
+int mpc5200_audio_dma_destroy(struct of_device *op);
+
+extern struct snd_soc_platform mpc5200_audio_dma_platform;
+
+#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */