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_192000)
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 
26 struct 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 
axg_tdm_lrclk_invert(unsigned int fmt)41 static 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 
axg_tdm_sclk_invert(unsigned int fmt)47 static 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 
52 struct 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 
63 struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface);
64 void axg_tdm_stream_free(struct axg_tdm_stream *ts);
65 int axg_tdm_stream_start(struct axg_tdm_stream *ts);
66 void axg_tdm_stream_stop(struct axg_tdm_stream *ts);
67 
axg_tdm_stream_reset(struct axg_tdm_stream * ts)68 static inline int axg_tdm_stream_reset(struct axg_tdm_stream *ts)
69 {
70 	axg_tdm_stream_stop(ts);
71 	return axg_tdm_stream_start(ts);
72 }
73 
74 int axg_tdm_set_tdm_slots(struct snd_soc_dai *dai, u32 *tx_mask,
75 			  u32 *rx_mask, unsigned int slots,
76 			  unsigned int slot_width);
77 
78 #endif /* _MESON_AXG_TDM_H */
79