ASoC: Basic split of mpc5200 DMA code out of mpc5200_psc_i2s

Basic split of mpc5200 DMA code out from i2s into a standalone file.

Signed-off-by: Jon Smirl <jonsmirl@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 81 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..9a19e8a70c5f
--- /dev/null
+++ b/sound/soc/fsl/mpc5200_dma.h
@@ -0,0 +1,81 @@
+/*
+ * Freescale MPC5200 Audio DMA driver
+ */
+
+#ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__
+#define __SOUND_SOC_FSL_MPC5200_DMA_H__
+
+/**
+ * psc_i2s_stream - Data specific to a single stream (playback or capture)
+ * @active:             flag indicating if the stream is active
+ * @psc_i2s:            pointer back to parent psc_i2s 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_i2s_stream {
+        int active;
+        struct psc_i2s *psc_i2s;
+        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;
+};
+
+/**
+ * psc_i2s - 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_i2s {
+        char name[32];
+        struct mpc52xx_psc __iomem *psc_regs;
+        struct mpc52xx_psc_fifo __iomem *fifo_regs;
+        unsigned int irq;
+        struct device *dev;
+        struct snd_soc_dai dai;
+        spinlock_t lock;
+        u32 sicr;
+
+        /* per-stream data */
+        struct psc_i2s_stream playback;
+        struct psc_i2s_stream capture;
+
+        /* Statistics */
+        struct {
+                int overrun_count;
+                int underrun_count;
+        } stats;
+};
+
+
+int psc_i2s_startup(struct snd_pcm_substream *substream,
+                           struct snd_soc_dai *dai);
+
+int psc_i2s_hw_free(struct snd_pcm_substream *substream,
+                           struct snd_soc_dai *dai);
+
+void psc_i2s_shutdown(struct snd_pcm_substream *substream,
+                             struct snd_soc_dai *dai);
+
+int psc_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
+                           struct snd_soc_dai *dai);
+
+extern struct snd_soc_platform psc_i2s_pcm_soc_platform;
+
+#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */