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_768000)
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
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
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 /* For continuous clock tracking */
63 bool clk_enabled;
64 };
65
66 struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface);
67 void axg_tdm_stream_free(struct axg_tdm_stream *ts);
68 int axg_tdm_stream_start(struct axg_tdm_stream *ts);
69 void axg_tdm_stream_stop(struct axg_tdm_stream *ts);
70 int axg_tdm_stream_set_cont_clocks(struct axg_tdm_stream *ts,
71 unsigned int fmt);
72
73 static 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
79 int 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 */
84
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