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 | |
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 | |
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 | |
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 | |