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linux-next/sound/soc/meson/axg-tdm.h

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ASoC: meson: add tdm formatter base driver Add Amlogic's axg TDM core driver. On this SoC, tdm is bit more complex than usual, mainly because the different TDM input decoders can be attached to any of TDM pad interface, including the output pads. For the this, TDM on this SoC is modeled like this: - TDM interface provides the DAIs the codecs will be attached to. The main responsibility of this driver is to manage the pad format and the TDM clock rates. - TDM Formatters: These are the entities which are actually dealing with the TDM signal. TDMOUT produce a TDM signal from the audio sample provided by FRDDR using the clocks provided the TDM interface. TDMIN feeds TODDR with audio sample using the clocks and TDM signal provided by the TDM Interface. - TDM Streams: This provides the link between 1 DAI stream of the TDM interface and one (or more) TDM formatters. This driver provides the TDM formatter and TDM stream operations. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-07-17 23:42:58 +08:00
/* SPDX-License-Identifier: (GPL-2.0 OR MIT)
*
* Copyright (c) 2018 Baylibre SAS.
* Author: Jerome Brunet <jbrunet@baylibre.com>
*/
#ifndef _MESON_AXG_TDM_H
#define _MESON_AXG_TDM_H
#include <linux/clk.h>
#include <linux/regmap.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#define AXG_TDM_NUM_LANES 4
#define AXG_TDM_CHANNEL_MAX 128
#define AXG_TDM_RATES (SNDRV_PCM_RATE_5512 | \
SNDRV_PCM_RATE_8000_192000)
#define AXG_TDM_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
struct axg_tdm_iface {
struct clk *sclk;
struct clk *lrclk;
struct clk *mclk;
unsigned long mclk_rate;
/* format is common to all the DAIs of the iface */
unsigned int fmt;
unsigned int slots;
unsigned int slot_width;
/* For component wide symmetry */
int rate;
};
static inline bool axg_tdm_lrclk_invert(unsigned int fmt)
{
ASoC: meson: axg-tdm: fix sample clock inversion The content of SND_SOC_DAIFMT_FORMAT_MASK is a number, not a bitfield, so the test to check if the format is i2s is wrong. Because of this the clock setting may be wrong. For example, the sample clock gets inverted in DSP B mode, when it should not. Fix the lrclk invert helper function Fixes: 1a11d88f499c ("ASoC: meson: add tdm formatter base driver") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-13 19:42:32 +08:00
return ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S) ^
ASoC: meson: add tdm formatter base driver Add Amlogic's axg TDM core driver. On this SoC, tdm is bit more complex than usual, mainly because the different TDM input decoders can be attached to any of TDM pad interface, including the output pads. For the this, TDM on this SoC is modeled like this: - TDM interface provides the DAIs the codecs will be attached to. The main responsibility of this driver is to manage the pad format and the TDM clock rates. - TDM Formatters: These are the entities which are actually dealing with the TDM signal. TDMOUT produce a TDM signal from the audio sample provided by FRDDR using the clocks provided the TDM interface. TDMIN feeds TODDR with audio sample using the clocks and TDM signal provided by the TDM Interface. - TDM Streams: This provides the link between 1 DAI stream of the TDM interface and one (or more) TDM formatters. This driver provides the TDM formatter and TDM stream operations. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-07-17 23:42:58 +08:00
!!(fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_NB_IF));
}
static inline bool axg_tdm_sclk_invert(unsigned int fmt)
{
return fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_IB_NF);
}
struct axg_tdm_stream {
struct axg_tdm_iface *iface;
struct list_head formatter_list;
struct mutex lock;
unsigned int channels;
unsigned int width;
unsigned int physical_width;
u32 *mask;
bool ready;
};
struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface);
void axg_tdm_stream_free(struct axg_tdm_stream *ts);
int axg_tdm_stream_start(struct axg_tdm_stream *ts);
void axg_tdm_stream_stop(struct axg_tdm_stream *ts);
static inline int axg_tdm_stream_reset(struct axg_tdm_stream *ts)
{
axg_tdm_stream_stop(ts);
return axg_tdm_stream_start(ts);
}
ASoC: meson: add tdm interface driver Add Amlogic's axg TDM interface driver. This driver manages the format and clocks provided on the pads. On this SoC, each stream direction provides 4 serial lanes. This makes a maximum of 8 channels in i2s modes and 128 channels in DSP modes. While each lanes operate on the same slot number (same bit clock), they may have different TDM masks. This requires to provide a function to let the card set the 4 masks, in lieu of the usual set_tdm_slots() callback of the dai driver. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-07-17 23:42:59 +08:00
int axg_tdm_set_tdm_slots(struct snd_soc_dai *dai, u32 *tx_mask,
u32 *rx_mask, unsigned int slots,
unsigned int slot_width);
ASoC: meson: add tdm formatter base driver Add Amlogic's axg TDM core driver. On this SoC, tdm is bit more complex than usual, mainly because the different TDM input decoders can be attached to any of TDM pad interface, including the output pads. For the this, TDM on this SoC is modeled like this: - TDM interface provides the DAIs the codecs will be attached to. The main responsibility of this driver is to manage the pad format and the TDM clock rates. - TDM Formatters: These are the entities which are actually dealing with the TDM signal. TDMOUT produce a TDM signal from the audio sample provided by FRDDR using the clocks provided the TDM interface. TDMIN feeds TODDR with audio sample using the clocks and TDM signal provided by the TDM Interface. - TDM Streams: This provides the link between 1 DAI stream of the TDM interface and one (or more) TDM formatters. This driver provides the TDM formatter and TDM stream operations. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-07-17 23:42:58 +08:00
#endif /* _MESON_AXG_TDM_H */
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