1/* SPDX-License-Identifier: (GPL-2.0 OR MIT)
 2 *
 3 * Copyright (c) 2018 Baylibre SAS.
 4 * Author: Jerome Brunet <jbrunet@baylibre.com>
 5 */
 6
 7#ifndef _MESON_AXG_TDM_H
 8#define _MESON_AXG_TDM_H
 9
10#include <linux/clk.h>
11#include <linux/regmap.h>
12#include <sound/pcm.h>
13#include <sound/soc.h>
14#include <sound/soc-dai.h>
15
16#define AXG_TDM_NUM_LANES	4
17#define AXG_TDM_CHANNEL_MAX	128
18#define AXG_TDM_RATES		(SNDRV_PCM_RATE_5512 |		\
19				 SNDRV_PCM_RATE_8000_384000)
20#define AXG_TDM_FORMATS		(SNDRV_PCM_FMTBIT_S8 |		\
21				 SNDRV_PCM_FMTBIT_S16_LE |	\
22				 SNDRV_PCM_FMTBIT_S20_LE |	\
23				 SNDRV_PCM_FMTBIT_S24_LE |	\
24				 SNDRV_PCM_FMTBIT_S32_LE)
25
26struct axg_tdm_iface {
27	struct clk *sclk;
28	struct clk *lrclk;
29	struct clk *mclk;
30	unsigned long mclk_rate;
31
32	/* format is common to all the DAIs of the iface */
33	unsigned int fmt;
34	unsigned int slots;
35	unsigned int slot_width;
36
37	/* For component wide symmetry */
38	int rate;
39};
40
41static inline bool axg_tdm_lrclk_invert(unsigned int fmt)
42{
43	return ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S) ^
44		!!(fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_NB_IF));
45}
46
47static inline bool axg_tdm_sclk_invert(unsigned int fmt)
48{
49	return fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_IB_NF);
50}
51
52struct axg_tdm_stream {
53	struct axg_tdm_iface *iface;
54	struct list_head formatter_list;
55	struct mutex lock;
56	unsigned int channels;
57	unsigned int width;
58	unsigned int physical_width;
59	u32 *mask;
60	bool ready;
61
62	/* For continuous clock tracking */
63	bool clk_enabled;
64};
65
66struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface);
67void axg_tdm_stream_free(struct axg_tdm_stream *ts);
68int axg_tdm_stream_start(struct axg_tdm_stream *ts);
69void axg_tdm_stream_stop(struct axg_tdm_stream *ts);
70int axg_tdm_stream_set_cont_clocks(struct axg_tdm_stream *ts,
71				   unsigned int fmt);
72
73static inline int axg_tdm_stream_reset(struct axg_tdm_stream *ts)
74{
75	axg_tdm_stream_stop(ts);
76	return axg_tdm_stream_start(ts);
77}
78
79int axg_tdm_set_tdm_slots(struct snd_soc_dai *dai, u32 *tx_mask,
80			  u32 *rx_mask, unsigned int slots,
81			  unsigned int slot_width);
82
83#endif /* _MESON_AXG_TDM_H */