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_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 19 SNDRV_PCM_FMTBIT_S16_LE | \ 20 SNDRV_PCM_FMTBIT_S20_LE | \ 21 SNDRV_PCM_FMTBIT_S24_LE | \ 22 SNDRV_PCM_FMTBIT_S32_LE) 23 24 struct axg_tdm_iface { 25 struct clk *sclk; 26 struct clk *lrclk; 27 struct clk *mclk; 28 unsigned long mclk_rate; 29 30 /* format is common to all the DAIs of the iface */ 31 unsigned int fmt; 32 unsigned int slots; 33 unsigned int slot_width; 34 35 /* For component wide symmetry */ 36 int rate; 37 }; 38 39 static inline bool axg_tdm_lrclk_invert(unsigned int fmt) 40 { 41 return ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S) ^ 42 !!(fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_NB_IF)); 43 } 44 45 static inline bool axg_tdm_sclk_invert(unsigned int fmt) 46 { 47 return fmt & (SND_SOC_DAIFMT_IB_IF | SND_SOC_DAIFMT_IB_NF); 48 } 49 50 struct axg_tdm_stream { 51 struct axg_tdm_iface *iface; 52 struct list_head formatter_list; 53 struct mutex lock; 54 unsigned int channels; 55 unsigned int width; 56 unsigned int physical_width; 57 u32 *mask; 58 bool ready; 59 60 /* For continuous clock tracking */ 61 bool clk_enabled; 62 }; 63 64 struct axg_tdm_stream *axg_tdm_stream_alloc(struct axg_tdm_iface *iface); 65 void axg_tdm_stream_free(struct axg_tdm_stream *ts); 66 int axg_tdm_stream_start(struct axg_tdm_stream *ts); 67 void axg_tdm_stream_stop(struct axg_tdm_stream *ts); 68 int axg_tdm_stream_set_cont_clocks(struct axg_tdm_stream *ts, 69 unsigned int fmt); 70 71 static inline int axg_tdm_stream_reset(struct axg_tdm_stream *ts) 72 { 73 axg_tdm_stream_stop(ts); 74 return axg_tdm_stream_start(ts); 75 } 76 77 int axg_tdm_set_tdm_slots(struct snd_soc_dai *dai, u32 *tx_mask, 78 u32 *rx_mask, unsigned int slots, 79 unsigned int slot_width); 80 81 #endif /* _MESON_AXG_TDM_H */ 82