| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| 41 | static inline bool axg_tdm_lrclk_invert(unsigned int fmt) |
| 42 | { |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 43 | return ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S) ^ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |