1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Copyright (c) 2020 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
5
6 #include <linux/bitfield.h>
7 #include <sound/pcm_params.h>
8 #include <sound/soc.h>
9 #include <sound/soc-dai.h>
10
11 #include <dt-bindings/sound/meson-aiu.h>
12 #include "aiu.h"
13 #include "meson-codec-glue.h"
14
15 #define CTRL_DIN_EN 15
16 #define CTRL_CLK_INV BIT(14)
17 #define CTRL_LRCLK_INV BIT(13)
18 #define CTRL_I2S_IN_BCLK_SRC BIT(11)
19 #define CTRL_DIN_LRCLK_SRC_SHIFT 6
20 #define CTRL_DIN_LRCLK_SRC (0x3 << CTRL_DIN_LRCLK_SRC_SHIFT)
21 #define CTRL_BCLK_MCLK_SRC GENMASK(5, 4)
22 #define CTRL_DIN_SKEW GENMASK(3, 2)
23 #define CTRL_I2S_OUT_LANE_SRC 0
24
25 #define AIU_ACODEC_OUT_CHMAX 2
26
27 static const char * const aiu_acodec_ctrl_mux_texts[] = {
28 "DISABLED", "I2S", "PCM",
29 };
30
aiu_acodec_ctrl_mux_put_enum(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)31 static int aiu_acodec_ctrl_mux_put_enum(struct snd_kcontrol *kcontrol,
32 struct snd_ctl_elem_value *ucontrol)
33 {
34 struct snd_soc_component *component =
35 snd_soc_dapm_kcontrol_component(kcontrol);
36 struct snd_soc_dapm_context *dapm =
37 snd_soc_dapm_kcontrol_dapm(kcontrol);
38 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
39 unsigned int mux, changed;
40
41 mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
42 changed = snd_soc_component_test_bits(component, e->reg,
43 CTRL_DIN_LRCLK_SRC,
44 FIELD_PREP(CTRL_DIN_LRCLK_SRC,
45 mux));
46
47 if (!changed)
48 return 0;
49
50 /* Force disconnect of the mux while updating */
51 snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
52
53 snd_soc_component_update_bits(component, e->reg,
54 CTRL_DIN_LRCLK_SRC |
55 CTRL_BCLK_MCLK_SRC,
56 FIELD_PREP(CTRL_DIN_LRCLK_SRC, mux) |
57 FIELD_PREP(CTRL_BCLK_MCLK_SRC, mux));
58
59 snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
60
61 return 0;
62 }
63
64 static SOC_ENUM_SINGLE_DECL(aiu_acodec_ctrl_mux_enum, AIU_ACODEC_CTRL,
65 CTRL_DIN_LRCLK_SRC_SHIFT,
66 aiu_acodec_ctrl_mux_texts);
67
68 static const struct snd_kcontrol_new aiu_acodec_ctrl_mux =
69 SOC_DAPM_ENUM_EXT("ACodec Source", aiu_acodec_ctrl_mux_enum,
70 snd_soc_dapm_get_enum_double,
71 aiu_acodec_ctrl_mux_put_enum);
72
73 static const struct snd_kcontrol_new aiu_acodec_ctrl_out_enable =
74 SOC_DAPM_SINGLE_AUTODISABLE("Switch", AIU_ACODEC_CTRL,
75 CTRL_DIN_EN, 1, 0);
76
77 static const struct snd_soc_dapm_widget aiu_acodec_ctrl_widgets[] = {
78 SND_SOC_DAPM_MUX("ACODEC SRC", SND_SOC_NOPM, 0, 0,
79 &aiu_acodec_ctrl_mux),
80 SND_SOC_DAPM_SWITCH("ACODEC OUT EN", SND_SOC_NOPM, 0, 0,
81 &aiu_acodec_ctrl_out_enable),
82 };
83
aiu_acodec_ctrl_input_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)84 static int aiu_acodec_ctrl_input_hw_params(struct snd_pcm_substream *substream,
85 struct snd_pcm_hw_params *params,
86 struct snd_soc_dai *dai)
87 {
88 struct meson_codec_glue_input *data;
89 int ret;
90
91 ret = meson_codec_glue_input_hw_params(substream, params, dai);
92 if (ret)
93 return ret;
94
95 /* The glue will provide 1 lane out of the 4 to the output */
96 data = meson_codec_glue_input_get_data(dai);
97 data->params.channels_min = min_t(unsigned int, AIU_ACODEC_OUT_CHMAX,
98 data->params.channels_min);
99 data->params.channels_max = min_t(unsigned int, AIU_ACODEC_OUT_CHMAX,
100 data->params.channels_max);
101
102 return 0;
103 }
104
105 static const struct snd_soc_dai_ops aiu_acodec_ctrl_input_ops = {
106 .hw_params = aiu_acodec_ctrl_input_hw_params,
107 .set_fmt = meson_codec_glue_input_set_fmt,
108 };
109
110 static const struct snd_soc_dai_ops aiu_acodec_ctrl_output_ops = {
111 .startup = meson_codec_glue_output_startup,
112 };
113
114 #define AIU_ACODEC_CTRL_FORMATS \
115 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
116 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE | \
117 SNDRV_PCM_FMTBIT_S32_LE)
118
119 #define AIU_ACODEC_STREAM(xname, xsuffix, xchmax) \
120 { \
121 .stream_name = xname " " xsuffix, \
122 .channels_min = 1, \
123 .channels_max = (xchmax), \
124 .rate_min = 5512, \
125 .rate_max = 192000, \
126 .formats = AIU_ACODEC_CTRL_FORMATS, \
127 }
128
129 #define AIU_ACODEC_INPUT(xname) { \
130 .name = "ACODEC CTRL " xname, \
131 .playback = AIU_ACODEC_STREAM(xname, "Playback", 8), \
132 .ops = &aiu_acodec_ctrl_input_ops, \
133 .probe = meson_codec_glue_input_dai_probe, \
134 .remove = meson_codec_glue_input_dai_remove, \
135 }
136
137 #define AIU_ACODEC_OUTPUT(xname) { \
138 .name = "ACODEC CTRL " xname, \
139 .capture = AIU_ACODEC_STREAM(xname, "Capture", AIU_ACODEC_OUT_CHMAX), \
140 .ops = &aiu_acodec_ctrl_output_ops, \
141 }
142
143 static struct snd_soc_dai_driver aiu_acodec_ctrl_dai_drv[] = {
144 [CTRL_I2S] = AIU_ACODEC_INPUT("ACODEC I2S IN"),
145 [CTRL_PCM] = AIU_ACODEC_INPUT("ACODEC PCM IN"),
146 [CTRL_OUT] = AIU_ACODEC_OUTPUT("ACODEC OUT"),
147 };
148
149 static const struct snd_soc_dapm_route aiu_acodec_ctrl_routes[] = {
150 { "ACODEC SRC", "I2S", "ACODEC I2S IN Playback" },
151 { "ACODEC SRC", "PCM", "ACODEC PCM IN Playback" },
152 { "ACODEC OUT EN", "Switch", "ACODEC SRC" },
153 { "ACODEC OUT Capture", NULL, "ACODEC OUT EN" },
154 };
155
156 static const struct snd_kcontrol_new aiu_acodec_ctrl_controls[] = {
157 SOC_SINGLE("ACODEC I2S Lane Select", AIU_ACODEC_CTRL,
158 CTRL_I2S_OUT_LANE_SRC, 3, 0),
159 };
160
aiu_acodec_of_xlate_dai_name(struct snd_soc_component * component,const struct of_phandle_args * args,const char ** dai_name)161 static int aiu_acodec_of_xlate_dai_name(struct snd_soc_component *component,
162 const struct of_phandle_args *args,
163 const char **dai_name)
164 {
165 return aiu_of_xlate_dai_name(component, args, dai_name, AIU_ACODEC);
166 }
167
aiu_acodec_ctrl_component_probe(struct snd_soc_component * component)168 static int aiu_acodec_ctrl_component_probe(struct snd_soc_component *component)
169 {
170 /*
171 * NOTE: Din Skew setting
172 * According to the documentation, the following update adds one delay
173 * to the din line. Without this, the output saturates. This happens
174 * regardless of the link format (i2s or left_j) so it is not clear what
175 * it actually does but it seems to be required
176 */
177 snd_soc_component_update_bits(component, AIU_ACODEC_CTRL,
178 CTRL_DIN_SKEW,
179 FIELD_PREP(CTRL_DIN_SKEW, 2));
180
181 return 0;
182 }
183
184 static const struct snd_soc_component_driver aiu_acodec_ctrl_component = {
185 .name = "AIU Internal DAC Codec Control",
186 .probe = aiu_acodec_ctrl_component_probe,
187 .controls = aiu_acodec_ctrl_controls,
188 .num_controls = ARRAY_SIZE(aiu_acodec_ctrl_controls),
189 .dapm_widgets = aiu_acodec_ctrl_widgets,
190 .num_dapm_widgets = ARRAY_SIZE(aiu_acodec_ctrl_widgets),
191 .dapm_routes = aiu_acodec_ctrl_routes,
192 .num_dapm_routes = ARRAY_SIZE(aiu_acodec_ctrl_routes),
193 .of_xlate_dai_name = aiu_acodec_of_xlate_dai_name,
194 .endianness = 1,
195 .non_legacy_dai_naming = 1,
196 };
197
aiu_acodec_ctrl_register_component(struct device * dev)198 int aiu_acodec_ctrl_register_component(struct device *dev)
199 {
200 return snd_soc_register_component(dev, &aiu_acodec_ctrl_component,
201 aiu_acodec_ctrl_dai_drv,
202 ARRAY_SIZE(aiu_acodec_ctrl_dai_drv));
203 }
204
