75d9ac46b9
For almost all machines the DAI format is a constant, always set to the same thing. This means that not only should we normally set it on init rather than in hw_params() (where it has been for historical reasons) we should also allow users to configure this by setting a variable in the dai_link structure. The combination of these two will make many machine drivers even more data driven. Implement a new dai_fmt field in the dai_link doing just that. Since 0 is a valid value for many format flags and we need to be able to tell if the field is actually set also add one to all the values used to configure formats. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
288 lines
8.4 KiB
C
288 lines
8.4 KiB
C
/*
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* linux/sound/soc-dai.h -- ALSA SoC Layer
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*
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* Copyright: 2005-2008 Wolfson Microelectronics. PLC.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Digital Audio Interface (DAI) API.
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*/
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#ifndef __LINUX_SND_SOC_DAI_H
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#define __LINUX_SND_SOC_DAI_H
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#include <linux/list.h>
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struct snd_pcm_substream;
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/*
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* DAI hardware audio formats.
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*
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* Describes the physical PCM data formating and clocking. Add new formats
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* to the end.
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*/
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#define SND_SOC_DAIFMT_I2S 1 /* I2S mode */
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#define SND_SOC_DAIFMT_RIGHT_J 2 /* Right Justified mode */
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#define SND_SOC_DAIFMT_LEFT_J 3 /* Left Justified mode */
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#define SND_SOC_DAIFMT_DSP_A 4 /* L data MSB after FRM LRC */
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#define SND_SOC_DAIFMT_DSP_B 5 /* L data MSB during FRM LRC */
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#define SND_SOC_DAIFMT_AC97 6 /* AC97 */
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#define SND_SOC_DAIFMT_PDM 7 /* Pulse density modulation */
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/* left and right justified also known as MSB and LSB respectively */
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#define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J
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#define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J
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/*
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* DAI Clock gating.
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*
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* DAI bit clocks can be be gated (disabled) when the DAI is not
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* sending or receiving PCM data in a frame. This can be used to save power.
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*/
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#define SND_SOC_DAIFMT_CONT (1 << 4) /* continuous clock */
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#define SND_SOC_DAIFMT_GATED (2 << 4) /* clock is gated */
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/*
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* DAI hardware signal inversions.
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*
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* Specifies whether the DAI can also support inverted clocks for the specified
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* format.
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*/
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#define SND_SOC_DAIFMT_NB_NF (1 << 8) /* normal bit clock + frame */
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#define SND_SOC_DAIFMT_NB_IF (2 << 8) /* normal BCLK + inv FRM */
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#define SND_SOC_DAIFMT_IB_NF (3 << 8) /* invert BCLK + nor FRM */
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#define SND_SOC_DAIFMT_IB_IF (4 << 8) /* invert BCLK + FRM */
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/*
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* DAI hardware clock masters.
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*
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* This is wrt the codec, the inverse is true for the interface
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* i.e. if the codec is clk and FRM master then the interface is
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* clk and frame slave.
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*/
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#define SND_SOC_DAIFMT_CBM_CFM (1 << 12) /* codec clk & FRM master */
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#define SND_SOC_DAIFMT_CBS_CFM (2 << 12) /* codec clk slave & FRM master */
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#define SND_SOC_DAIFMT_CBM_CFS (3 << 12) /* codec clk master & frame slave */
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#define SND_SOC_DAIFMT_CBS_CFS (4 << 12) /* codec clk & FRM slave */
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#define SND_SOC_DAIFMT_FORMAT_MASK 0x000f
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#define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0
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#define SND_SOC_DAIFMT_INV_MASK 0x0f00
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#define SND_SOC_DAIFMT_MASTER_MASK 0xf000
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/*
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* Master Clock Directions
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*/
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#define SND_SOC_CLOCK_IN 0
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#define SND_SOC_CLOCK_OUT 1
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#define SND_SOC_STD_AC97_FMTS (SNDRV_PCM_FMTBIT_S8 |\
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SNDRV_PCM_FMTBIT_S16_LE |\
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SNDRV_PCM_FMTBIT_S16_BE |\
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SNDRV_PCM_FMTBIT_S20_3LE |\
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SNDRV_PCM_FMTBIT_S20_3BE |\
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SNDRV_PCM_FMTBIT_S24_3LE |\
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SNDRV_PCM_FMTBIT_S24_3BE |\
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SNDRV_PCM_FMTBIT_S32_LE |\
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SNDRV_PCM_FMTBIT_S32_BE)
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struct snd_soc_dai_driver;
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struct snd_soc_dai;
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struct snd_ac97_bus_ops;
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/* Digital Audio Interface registration */
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int snd_soc_register_dai(struct device *dev,
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struct snd_soc_dai_driver *dai_drv);
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void snd_soc_unregister_dai(struct device *dev);
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int snd_soc_register_dais(struct device *dev,
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struct snd_soc_dai_driver *dai_drv, size_t count);
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void snd_soc_unregister_dais(struct device *dev, size_t count);
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/* Digital Audio Interface clocking API.*/
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int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
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unsigned int freq, int dir);
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int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
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int div_id, int div);
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int snd_soc_dai_set_pll(struct snd_soc_dai *dai,
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int pll_id, int source, unsigned int freq_in, unsigned int freq_out);
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/* Digital Audio interface formatting */
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int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
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int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
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unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width);
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int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
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unsigned int tx_num, unsigned int *tx_slot,
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unsigned int rx_num, unsigned int *rx_slot);
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int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
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/* Digital Audio Interface mute */
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int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute);
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struct snd_soc_dai_ops {
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/*
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* DAI clocking configuration, all optional.
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* Called by soc_card drivers, normally in their hw_params.
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*/
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int (*set_sysclk)(struct snd_soc_dai *dai,
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int clk_id, unsigned int freq, int dir);
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int (*set_pll)(struct snd_soc_dai *dai, int pll_id, int source,
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unsigned int freq_in, unsigned int freq_out);
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int (*set_clkdiv)(struct snd_soc_dai *dai, int div_id, int div);
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/*
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* DAI format configuration
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* Called by soc_card drivers, normally in their hw_params.
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*/
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int (*set_fmt)(struct snd_soc_dai *dai, unsigned int fmt);
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int (*set_tdm_slot)(struct snd_soc_dai *dai,
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unsigned int tx_mask, unsigned int rx_mask,
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int slots, int slot_width);
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int (*set_channel_map)(struct snd_soc_dai *dai,
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unsigned int tx_num, unsigned int *tx_slot,
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unsigned int rx_num, unsigned int *rx_slot);
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int (*set_tristate)(struct snd_soc_dai *dai, int tristate);
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/*
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* DAI digital mute - optional.
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* Called by soc-core to minimise any pops.
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*/
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int (*digital_mute)(struct snd_soc_dai *dai, int mute);
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/*
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* ALSA PCM audio operations - all optional.
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* Called by soc-core during audio PCM operations.
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*/
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int (*startup)(struct snd_pcm_substream *,
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struct snd_soc_dai *);
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void (*shutdown)(struct snd_pcm_substream *,
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struct snd_soc_dai *);
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int (*hw_params)(struct snd_pcm_substream *,
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struct snd_pcm_hw_params *, struct snd_soc_dai *);
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int (*hw_free)(struct snd_pcm_substream *,
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struct snd_soc_dai *);
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int (*prepare)(struct snd_pcm_substream *,
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struct snd_soc_dai *);
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int (*trigger)(struct snd_pcm_substream *, int,
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struct snd_soc_dai *);
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/*
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* For hardware based FIFO caused delay reporting.
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* Optional.
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*/
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snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *,
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struct snd_soc_dai *);
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};
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/*
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* Digital Audio Interface Driver.
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*
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* Describes the Digital Audio Interface in terms of its ALSA, DAI and AC97
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* operations and capabilities. Codec and platform drivers will register this
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* structure for every DAI they have.
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*
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* This structure covers the clocking, formating and ALSA operations for each
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* interface.
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*/
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struct snd_soc_dai_driver {
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/* DAI description */
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const char *name;
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unsigned int id;
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int ac97_control;
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/* DAI driver callbacks */
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int (*probe)(struct snd_soc_dai *dai);
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int (*remove)(struct snd_soc_dai *dai);
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int (*suspend)(struct snd_soc_dai *dai);
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int (*resume)(struct snd_soc_dai *dai);
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/* ops */
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const struct snd_soc_dai_ops *ops;
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/* DAI capabilities */
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struct snd_soc_pcm_stream capture;
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struct snd_soc_pcm_stream playback;
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unsigned int symmetric_rates:1;
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/* probe ordering - for components with runtime dependencies */
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int probe_order;
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int remove_order;
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};
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/*
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* Digital Audio Interface runtime data.
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*
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* Holds runtime data for a DAI.
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*/
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struct snd_soc_dai {
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const char *name;
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int id;
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struct device *dev;
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void *ac97_pdata; /* platform_data for the ac97 codec */
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/* driver ops */
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struct snd_soc_dai_driver *driver;
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/* DAI runtime info */
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unsigned int capture_active:1; /* stream is in use */
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unsigned int playback_active:1; /* stream is in use */
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unsigned int symmetric_rates:1;
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struct snd_pcm_runtime *runtime;
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unsigned int active;
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unsigned char pop_wait:1;
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unsigned char probed:1;
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/* DAI DMA data */
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void *playback_dma_data;
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void *capture_dma_data;
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/* Symmetry data - only valid if symmetry is being enforced */
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unsigned int rate;
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/* parent platform/codec */
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union {
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struct snd_soc_platform *platform;
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struct snd_soc_codec *codec;
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};
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struct snd_soc_card *card;
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struct list_head list;
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struct list_head card_list;
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};
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static inline void *snd_soc_dai_get_dma_data(const struct snd_soc_dai *dai,
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const struct snd_pcm_substream *ss)
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{
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return (ss->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
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dai->playback_dma_data : dai->capture_dma_data;
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}
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static inline void snd_soc_dai_set_dma_data(struct snd_soc_dai *dai,
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const struct snd_pcm_substream *ss,
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void *data)
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{
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if (ss->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dai->playback_dma_data = data;
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else
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dai->capture_dma_data = data;
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}
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static inline void snd_soc_dai_set_drvdata(struct snd_soc_dai *dai,
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void *data)
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{
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dev_set_drvdata(dai->dev, data);
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}
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static inline void *snd_soc_dai_get_drvdata(struct snd_soc_dai *dai)
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{
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return dev_get_drvdata(dai->dev);
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}
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#endif
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