summaryrefslogtreecommitdiffstats
path: root/sound/soc/fsl/fsl_asrc_common.h
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/fsl/fsl_asrc_common.h')
-rw-r--r--sound/soc/fsl/fsl_asrc_common.h108
1 files changed, 108 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_asrc_common.h b/sound/soc/fsl/fsl_asrc_common.h
new file mode 100644
index 000000000..7e1c13ca3
--- /dev/null
+++ b/sound/soc/fsl/fsl_asrc_common.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2019 NXP
+ *
+ */
+
+#ifndef _FSL_ASRC_COMMON_H
+#define _FSL_ASRC_COMMON_H
+
+/* directions */
+#define IN 0
+#define OUT 1
+
+enum asrc_pair_index {
+ ASRC_INVALID_PAIR = -1,
+ ASRC_PAIR_A = 0,
+ ASRC_PAIR_B = 1,
+ ASRC_PAIR_C = 2,
+ ASRC_PAIR_D = 3,
+};
+
+#define PAIR_CTX_NUM 0x4
+
+/**
+ * fsl_asrc_pair: ASRC Pair common data
+ *
+ * @asrc: pointer to its parent module
+ * @error: error record
+ * @index: pair index (ASRC_PAIR_A, ASRC_PAIR_B, ASRC_PAIR_C)
+ * @channels: occupied channel number
+ * @desc: input and output dma descriptors
+ * @dma_chan: inputer and output DMA channels
+ * @dma_data: private dma data
+ * @pos: hardware pointer position
+ * @req_dma_chan: flag to release dev_to_dev chan
+ * @private: pair private area
+ */
+struct fsl_asrc_pair {
+ struct fsl_asrc *asrc;
+ unsigned int error;
+
+ enum asrc_pair_index index;
+ unsigned int channels;
+
+ struct dma_async_tx_descriptor *desc[2];
+ struct dma_chan *dma_chan[2];
+ struct imx_dma_data dma_data;
+ unsigned int pos;
+ bool req_dma_chan;
+
+ void *private;
+};
+
+/**
+ * fsl_asrc: ASRC common data
+ *
+ * @dma_params_rx: DMA parameters for receive channel
+ * @dma_params_tx: DMA parameters for transmit channel
+ * @pdev: platform device pointer
+ * @regmap: regmap handler
+ * @paddr: physical address to the base address of registers
+ * @mem_clk: clock source to access register
+ * @ipg_clk: clock source to drive peripheral
+ * @spba_clk: SPBA clock (optional, depending on SoC design)
+ * @lock: spin lock for resource protection
+ * @pair: pair pointers
+ * @channel_avail: non-occupied channel numbers
+ * @asrc_rate: default sample rate for ASoC Back-Ends
+ * @asrc_format: default sample format for ASoC Back-Ends
+ * @use_edma: edma is used
+ * @get_dma_channel: function pointer
+ * @request_pair: function pointer
+ * @release_pair: function pointer
+ * @get_fifo_addr: function pointer
+ * @pair_priv_size: size of pair private struct.
+ * @private: private data structure
+ */
+struct fsl_asrc {
+ struct snd_dmaengine_dai_dma_data dma_params_rx;
+ struct snd_dmaengine_dai_dma_data dma_params_tx;
+ struct platform_device *pdev;
+ struct regmap *regmap;
+ unsigned long paddr;
+ struct clk *mem_clk;
+ struct clk *ipg_clk;
+ struct clk *spba_clk;
+ spinlock_t lock; /* spin lock for resource protection */
+
+ struct fsl_asrc_pair *pair[PAIR_CTX_NUM];
+ unsigned int channel_avail;
+
+ int asrc_rate;
+ snd_pcm_format_t asrc_format;
+ bool use_edma;
+
+ struct dma_chan *(*get_dma_channel)(struct fsl_asrc_pair *pair, bool dir);
+ int (*request_pair)(int channels, struct fsl_asrc_pair *pair);
+ void (*release_pair)(struct fsl_asrc_pair *pair);
+ int (*get_fifo_addr)(u8 dir, enum asrc_pair_index index);
+ size_t pair_priv_size;
+
+ void *private;
+};
+
+#define DRV_NAME "fsl-asrc-dai"
+extern struct snd_soc_component_driver fsl_asrc_component;
+
+#endif /* _FSL_ASRC_COMMON_H */