1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Lochnagar sound card driver
4 //
5 // Copyright (c) 2017-2019 Cirrus Logic, Inc. and
6 // Cirrus Logic International Semiconductor Ltd.
7 //
8 // Author: Charles Keepax <ckeepax@opensource.cirrus.com>
9 // Piotr Stankiewicz <piotrs@opensource.cirrus.com>
10
11 #include <linux/clk.h>
12 #include <linux/module.h>
13 #include <sound/soc.h>
14
15 #include <linux/mfd/lochnagar.h>
16 #include <linux/mfd/lochnagar1_regs.h>
17 #include <linux/mfd/lochnagar2_regs.h>
18
19 struct lochnagar_sc_priv {
20 struct clk *mclk;
21 };
22
23 static const struct snd_soc_dapm_widget lochnagar_sc_widgets[] = {
24 SND_SOC_DAPM_LINE("Line Jack", NULL),
25 SND_SOC_DAPM_LINE("USB Audio", NULL),
26 };
27
28 static const struct snd_soc_dapm_route lochnagar_sc_routes[] = {
29 { "Line Jack", NULL, "AIF1 Playback" },
30 { "AIF1 Capture", NULL, "Line Jack" },
31
32 { "USB Audio", NULL, "USB1 Playback" },
33 { "USB Audio", NULL, "USB2 Playback" },
34 { "USB1 Capture", NULL, "USB Audio" },
35 { "USB2 Capture", NULL, "USB Audio" },
36 };
37
38 static const unsigned int lochnagar_sc_chan_vals[] = {
39 4, 8,
40 };
41
42 static const struct snd_pcm_hw_constraint_list lochnagar_sc_chan_constraint = {
43 .count = ARRAY_SIZE(lochnagar_sc_chan_vals),
44 .list = lochnagar_sc_chan_vals,
45 };
46
47 static const unsigned int lochnagar_sc_rate_vals[] = {
48 8000, 16000, 24000, 32000, 48000, 96000, 192000,
49 22050, 44100, 88200, 176400,
50 };
51
52 static const struct snd_pcm_hw_constraint_list lochnagar_sc_rate_constraint = {
53 .count = ARRAY_SIZE(lochnagar_sc_rate_vals),
54 .list = lochnagar_sc_rate_vals,
55 };
56
lochnagar_sc_hw_rule_rate(struct snd_pcm_hw_params * params,struct snd_pcm_hw_rule * rule)57 static int lochnagar_sc_hw_rule_rate(struct snd_pcm_hw_params *params,
58 struct snd_pcm_hw_rule *rule)
59 {
60 struct snd_interval range = {
61 .min = 8000,
62 .max = 24576000 / hw_param_interval(params, rule->deps[0])->max,
63 };
64
65 return snd_interval_refine(hw_param_interval(params, rule->var),
66 &range);
67 }
68
lochnagar_sc_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)69 static int lochnagar_sc_startup(struct snd_pcm_substream *substream,
70 struct snd_soc_dai *dai)
71 {
72 struct snd_soc_component *comp = dai->component;
73 struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
74 int ret;
75
76 ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
77 SNDRV_PCM_HW_PARAM_RATE,
78 &lochnagar_sc_rate_constraint);
79 if (ret)
80 return ret;
81
82 return snd_pcm_hw_rule_add(substream->runtime, 0,
83 SNDRV_PCM_HW_PARAM_RATE,
84 lochnagar_sc_hw_rule_rate, priv,
85 SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
86 }
87
lochnagar_sc_line_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)88 static int lochnagar_sc_line_startup(struct snd_pcm_substream *substream,
89 struct snd_soc_dai *dai)
90 {
91 struct snd_soc_component *comp = dai->component;
92 struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
93 int ret;
94
95 ret = clk_prepare_enable(priv->mclk);
96 if (ret < 0) {
97 dev_err(dai->dev, "Failed to enable MCLK: %d\n", ret);
98 return ret;
99 }
100
101 ret = lochnagar_sc_startup(substream, dai);
102 if (ret)
103 return ret;
104
105 return snd_pcm_hw_constraint_list(substream->runtime, 0,
106 SNDRV_PCM_HW_PARAM_CHANNELS,
107 &lochnagar_sc_chan_constraint);
108 }
109
lochnagar_sc_line_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)110 static void lochnagar_sc_line_shutdown(struct snd_pcm_substream *substream,
111 struct snd_soc_dai *dai)
112 {
113 struct snd_soc_component *comp = dai->component;
114 struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
115
116 clk_disable_unprepare(priv->mclk);
117 }
118
lochnagar_sc_check_fmt(struct snd_soc_dai * dai,unsigned int fmt,unsigned int tar)119 static int lochnagar_sc_check_fmt(struct snd_soc_dai *dai, unsigned int fmt,
120 unsigned int tar)
121 {
122 tar |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
123
124 if ((fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) != tar)
125 return -EINVAL;
126
127 return 0;
128 }
129
lochnagar_sc_set_line_fmt(struct snd_soc_dai * dai,unsigned int fmt)130 static int lochnagar_sc_set_line_fmt(struct snd_soc_dai *dai, unsigned int fmt)
131 {
132 return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBS_CFS);
133 }
134
lochnagar_sc_set_usb_fmt(struct snd_soc_dai * dai,unsigned int fmt)135 static int lochnagar_sc_set_usb_fmt(struct snd_soc_dai *dai, unsigned int fmt)
136 {
137 return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBM_CFM);
138 }
139
140 static const struct snd_soc_dai_ops lochnagar_sc_line_ops = {
141 .startup = lochnagar_sc_line_startup,
142 .shutdown = lochnagar_sc_line_shutdown,
143 .set_fmt = lochnagar_sc_set_line_fmt,
144 };
145
146 static const struct snd_soc_dai_ops lochnagar_sc_usb_ops = {
147 .startup = lochnagar_sc_startup,
148 .set_fmt = lochnagar_sc_set_usb_fmt,
149 };
150
151 static struct snd_soc_dai_driver lochnagar_sc_dai[] = {
152 {
153 .name = "lochnagar-line",
154 .playback = {
155 .stream_name = "AIF1 Playback",
156 .channels_min = 4,
157 .channels_max = 8,
158 .rates = SNDRV_PCM_RATE_KNOT,
159 .formats = SNDRV_PCM_FMTBIT_S32_LE,
160 },
161 .capture = {
162 .stream_name = "AIF1 Capture",
163 .channels_min = 4,
164 .channels_max = 8,
165 .rates = SNDRV_PCM_RATE_KNOT,
166 .formats = SNDRV_PCM_FMTBIT_S32_LE,
167 },
168 .ops = &lochnagar_sc_line_ops,
169 .symmetric_rates = true,
170 .symmetric_samplebits = true,
171 },
172 {
173 .name = "lochnagar-usb1",
174 .playback = {
175 .stream_name = "USB1 Playback",
176 .channels_min = 1,
177 .channels_max = 8,
178 .rates = SNDRV_PCM_RATE_KNOT,
179 .formats = SNDRV_PCM_FMTBIT_S32_LE,
180 },
181 .capture = {
182 .stream_name = "USB1 Capture",
183 .channels_min = 1,
184 .channels_max = 8,
185 .rates = SNDRV_PCM_RATE_KNOT,
186 .formats = SNDRV_PCM_FMTBIT_S32_LE,
187 },
188 .ops = &lochnagar_sc_usb_ops,
189 .symmetric_rates = true,
190 .symmetric_samplebits = true,
191 },
192 {
193 .name = "lochnagar-usb2",
194 .playback = {
195 .stream_name = "USB2 Playback",
196 .channels_min = 1,
197 .channels_max = 8,
198 .rates = SNDRV_PCM_RATE_KNOT,
199 .formats = SNDRV_PCM_FMTBIT_S32_LE,
200 },
201 .capture = {
202 .stream_name = "USB2 Capture",
203 .channels_min = 1,
204 .channels_max = 8,
205 .rates = SNDRV_PCM_RATE_KNOT,
206 .formats = SNDRV_PCM_FMTBIT_S32_LE,
207 },
208 .ops = &lochnagar_sc_usb_ops,
209 .symmetric_rates = true,
210 .symmetric_samplebits = true,
211 },
212 };
213
214 static const struct snd_soc_component_driver lochnagar_sc_driver = {
215 .non_legacy_dai_naming = 1,
216
217 .dapm_widgets = lochnagar_sc_widgets,
218 .num_dapm_widgets = ARRAY_SIZE(lochnagar_sc_widgets),
219 .dapm_routes = lochnagar_sc_routes,
220 .num_dapm_routes = ARRAY_SIZE(lochnagar_sc_routes),
221 };
222
lochnagar_sc_probe(struct platform_device * pdev)223 static int lochnagar_sc_probe(struct platform_device *pdev)
224 {
225 struct lochnagar_sc_priv *priv;
226 int ret;
227
228 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
229 if (!priv)
230 return -ENOMEM;
231
232 priv->mclk = devm_clk_get(&pdev->dev, "mclk");
233 if (IS_ERR(priv->mclk)) {
234 ret = PTR_ERR(priv->mclk);
235 dev_err(&pdev->dev, "Failed to get MCLK: %d\n", ret);
236 return ret;
237 }
238
239 platform_set_drvdata(pdev, priv);
240
241 return devm_snd_soc_register_component(&pdev->dev,
242 &lochnagar_sc_driver,
243 lochnagar_sc_dai,
244 ARRAY_SIZE(lochnagar_sc_dai));
245 }
246
247 static const struct of_device_id lochnagar_of_match[] = {
248 { .compatible = "cirrus,lochnagar2-soundcard" },
249 {}
250 };
251 MODULE_DEVICE_TABLE(of, lochnagar_of_match);
252
253 static struct platform_driver lochnagar_sc_codec_driver = {
254 .driver = {
255 .name = "lochnagar-soundcard",
256 .of_match_table = of_match_ptr(lochnagar_of_match),
257 },
258
259 .probe = lochnagar_sc_probe,
260 };
261 module_platform_driver(lochnagar_sc_codec_driver);
262
263 MODULE_DESCRIPTION("ASoC Lochnagar Sound Card Driver");
264 MODULE_AUTHOR("Piotr Stankiewicz <piotrs@opensource.cirrus.com>");
265 MODULE_LICENSE("GPL v2");
266 MODULE_ALIAS("platform:lochnagar-soundcard");
267
