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 | #include <linux/gpio/consumer.h> |
7 | #include <linux/of_platform.h> |
8 | #include <linux/module.h> |
9 | #include <sound/soc.h> |
10 | |
11 | struct es7241_clock_mode { |
12 | unsigned int rate_min; |
13 | unsigned int rate_max; |
14 | unsigned int *slv_mfs; |
15 | unsigned int slv_mfs_num; |
16 | unsigned int mst_mfs; |
17 | unsigned int mst_m0:1; |
18 | unsigned int mst_m1:1; |
19 | }; |
20 | |
21 | struct es7241_chip { |
22 | const struct es7241_clock_mode *modes; |
23 | unsigned int mode_num; |
24 | }; |
25 | |
26 | struct es7241_data { |
27 | struct gpio_desc *reset; |
28 | struct gpio_desc *m0; |
29 | struct gpio_desc *m1; |
30 | unsigned int fmt; |
31 | unsigned int mclk; |
32 | bool is_consumer; |
33 | const struct es7241_chip *chip; |
34 | }; |
35 | |
36 | static void es7241_set_mode(struct es7241_data *priv, int m0, int m1) |
37 | { |
38 | /* put the device in reset */ |
39 | gpiod_set_value_cansleep(desc: priv->reset, value: 0); |
40 | |
41 | /* set the mode */ |
42 | gpiod_set_value_cansleep(desc: priv->m0, value: m0); |
43 | gpiod_set_value_cansleep(desc: priv->m1, value: m1); |
44 | |
45 | /* take the device out of reset - datasheet does not specify a delay */ |
46 | gpiod_set_value_cansleep(desc: priv->reset, value: 1); |
47 | } |
48 | |
49 | static int es7241_set_consumer_mode(struct es7241_data *priv, |
50 | const struct es7241_clock_mode *mode, |
51 | unsigned int mfs) |
52 | { |
53 | int j; |
54 | |
55 | if (!mfs) |
56 | goto out_ok; |
57 | |
58 | for (j = 0; j < mode->slv_mfs_num; j++) { |
59 | if (mode->slv_mfs[j] == mfs) |
60 | goto out_ok; |
61 | } |
62 | |
63 | return -EINVAL; |
64 | |
65 | out_ok: |
66 | es7241_set_mode(priv, m0: 1, m1: 1); |
67 | return 0; |
68 | } |
69 | |
70 | static int es7241_set_provider_mode(struct es7241_data *priv, |
71 | const struct es7241_clock_mode *mode, |
72 | unsigned int mfs) |
73 | { |
74 | /* |
75 | * We can't really set clock ratio, if the mclk/lrclk is different |
76 | * from what we provide, then error out |
77 | */ |
78 | if (mfs && mfs != mode->mst_mfs) |
79 | return -EINVAL; |
80 | |
81 | es7241_set_mode(priv, m0: mode->mst_m0, m1: mode->mst_m1); |
82 | |
83 | return 0; |
84 | } |
85 | |
86 | static int es7241_hw_params(struct snd_pcm_substream *substream, |
87 | struct snd_pcm_hw_params *params, |
88 | struct snd_soc_dai *dai) |
89 | { |
90 | struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); |
91 | unsigned int rate = params_rate(p: params); |
92 | unsigned int mfs = priv->mclk / rate; |
93 | int i; |
94 | |
95 | for (i = 0; i < priv->chip->mode_num; i++) { |
96 | const struct es7241_clock_mode *mode = &priv->chip->modes[i]; |
97 | |
98 | if (rate < mode->rate_min || rate >= mode->rate_max) |
99 | continue; |
100 | |
101 | if (priv->is_consumer) |
102 | return es7241_set_consumer_mode(priv, mode, mfs); |
103 | else |
104 | return es7241_set_provider_mode(priv, mode, mfs); |
105 | } |
106 | |
107 | /* should not happen */ |
108 | dev_err(dai->dev, "unsupported rate: %u\n" , rate); |
109 | return -EINVAL; |
110 | } |
111 | |
112 | static int es7241_set_sysclk(struct snd_soc_dai *dai, int clk_id, |
113 | unsigned int freq, int dir) |
114 | { |
115 | struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); |
116 | |
117 | if (dir == SND_SOC_CLOCK_IN && clk_id == 0) { |
118 | priv->mclk = freq; |
119 | return 0; |
120 | } |
121 | |
122 | return -ENOTSUPP; |
123 | } |
124 | |
125 | static int es7241_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
126 | { |
127 | struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); |
128 | |
129 | if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) { |
130 | dev_err(dai->dev, "Unsupported dai clock inversion\n" ); |
131 | return -EINVAL; |
132 | } |
133 | |
134 | if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != priv->fmt) { |
135 | dev_err(dai->dev, "Invalid dai format\n" ); |
136 | return -EINVAL; |
137 | } |
138 | |
139 | switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { |
140 | case SND_SOC_DAIFMT_CBC_CFC: |
141 | priv->is_consumer = true; |
142 | break; |
143 | case SND_SOC_DAIFMT_CBP_CFP: |
144 | priv->is_consumer = false; |
145 | break; |
146 | |
147 | default: |
148 | dev_err(dai->dev, "Unsupported clock configuration\n" ); |
149 | return -EINVAL; |
150 | } |
151 | |
152 | return 0; |
153 | } |
154 | |
155 | static const struct snd_soc_dai_ops es7241_dai_ops = { |
156 | .set_fmt = es7241_set_fmt, |
157 | .hw_params = es7241_hw_params, |
158 | .set_sysclk = es7241_set_sysclk, |
159 | }; |
160 | |
161 | static struct snd_soc_dai_driver es7241_dai = { |
162 | .name = "es7241-hifi" , |
163 | .capture = { |
164 | .stream_name = "Capture" , |
165 | .channels_min = 2, |
166 | .channels_max = 2, |
167 | .rates = SNDRV_PCM_RATE_8000_192000, |
168 | .formats = (SNDRV_PCM_FMTBIT_S16_LE | |
169 | SNDRV_PCM_FMTBIT_S24_3LE | |
170 | SNDRV_PCM_FMTBIT_S24_LE), |
171 | }, |
172 | .ops = &es7241_dai_ops, |
173 | }; |
174 | |
175 | static const struct es7241_clock_mode es7241_modes[] = { |
176 | { |
177 | /* Single speed mode */ |
178 | .rate_min = 8000, |
179 | .rate_max = 50000, |
180 | .slv_mfs = (unsigned int[]) { 256, 384, 512, 768, 1024 }, |
181 | .slv_mfs_num = 5, |
182 | .mst_mfs = 256, |
183 | .mst_m0 = 0, |
184 | .mst_m1 = 0, |
185 | }, { |
186 | /* Double speed mode */ |
187 | .rate_min = 50000, |
188 | .rate_max = 100000, |
189 | .slv_mfs = (unsigned int[]) { 128, 192 }, |
190 | .slv_mfs_num = 2, |
191 | .mst_mfs = 128, |
192 | .mst_m0 = 1, |
193 | .mst_m1 = 0, |
194 | }, { |
195 | /* Quad speed mode */ |
196 | .rate_min = 100000, |
197 | .rate_max = 200000, |
198 | .slv_mfs = (unsigned int[]) { 64 }, |
199 | .slv_mfs_num = 1, |
200 | .mst_mfs = 64, |
201 | .mst_m0 = 0, |
202 | .mst_m1 = 1, |
203 | }, |
204 | }; |
205 | |
206 | static const struct es7241_chip es7241_chip __maybe_unused = { |
207 | .modes = es7241_modes, |
208 | .mode_num = ARRAY_SIZE(es7241_modes), |
209 | }; |
210 | |
211 | static const struct snd_soc_dapm_widget es7241_dapm_widgets[] = { |
212 | SND_SOC_DAPM_INPUT("AINL" ), |
213 | SND_SOC_DAPM_INPUT("AINR" ), |
214 | SND_SOC_DAPM_DAC("ADC" , "Capture" , SND_SOC_NOPM, 0, 0), |
215 | SND_SOC_DAPM_REGULATOR_SUPPLY("VDDP" , 0, 0), |
216 | SND_SOC_DAPM_REGULATOR_SUPPLY("VDDD" , 0, 0), |
217 | SND_SOC_DAPM_REGULATOR_SUPPLY("VDDA" , 0, 0), |
218 | }; |
219 | |
220 | static const struct snd_soc_dapm_route es7241_dapm_routes[] = { |
221 | { "ADC" , NULL, "AINL" , }, |
222 | { "ADC" , NULL, "AINR" , }, |
223 | { "ADC" , NULL, "VDDA" , }, |
224 | { "Capture" , NULL, "VDDP" , }, |
225 | { "Capture" , NULL, "VDDD" , }, |
226 | }; |
227 | |
228 | static const struct snd_soc_component_driver es7241_component_driver = { |
229 | .dapm_widgets = es7241_dapm_widgets, |
230 | .num_dapm_widgets = ARRAY_SIZE(es7241_dapm_widgets), |
231 | .dapm_routes = es7241_dapm_routes, |
232 | .num_dapm_routes = ARRAY_SIZE(es7241_dapm_routes), |
233 | .idle_bias_on = 1, |
234 | .endianness = 1, |
235 | }; |
236 | |
237 | static void es7241_parse_fmt(struct device *dev, struct es7241_data *priv) |
238 | { |
239 | bool is_leftj; |
240 | |
241 | /* |
242 | * The format is given by a pull resistor on the SDOUT pin: |
243 | * pull-up for i2s, pull-down for left justified. |
244 | */ |
245 | is_leftj = of_property_read_bool(np: dev->of_node, |
246 | propname: "everest,sdout-pull-down" ); |
247 | if (is_leftj) |
248 | priv->fmt = SND_SOC_DAIFMT_LEFT_J; |
249 | else |
250 | priv->fmt = SND_SOC_DAIFMT_I2S; |
251 | } |
252 | |
253 | static int es7241_probe(struct platform_device *pdev) |
254 | { |
255 | struct device *dev = &pdev->dev; |
256 | struct es7241_data *priv; |
257 | |
258 | priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL); |
259 | if (!priv) |
260 | return -ENOMEM; |
261 | platform_set_drvdata(pdev, data: priv); |
262 | |
263 | priv->chip = of_device_get_match_data(dev); |
264 | if (!priv->chip) { |
265 | dev_err(dev, "failed to match device\n" ); |
266 | return -ENODEV; |
267 | } |
268 | |
269 | es7241_parse_fmt(dev, priv); |
270 | |
271 | priv->reset = devm_gpiod_get_optional(dev, con_id: "reset" , flags: GPIOD_OUT_LOW); |
272 | if (IS_ERR(ptr: priv->reset)) |
273 | return dev_err_probe(dev, err: PTR_ERR(ptr: priv->reset), |
274 | fmt: "Failed to get 'reset' gpio" ); |
275 | |
276 | priv->m0 = devm_gpiod_get_optional(dev, con_id: "m0" , flags: GPIOD_OUT_LOW); |
277 | if (IS_ERR(ptr: priv->m0)) |
278 | return dev_err_probe(dev, err: PTR_ERR(ptr: priv->m0), |
279 | fmt: "Failed to get 'm0' gpio" ); |
280 | |
281 | priv->m1 = devm_gpiod_get_optional(dev, con_id: "m1" , flags: GPIOD_OUT_LOW); |
282 | if (IS_ERR(ptr: priv->m1)) |
283 | return dev_err_probe(dev, err: PTR_ERR(ptr: priv->m1), |
284 | fmt: "Failed to get 'm1' gpio" ); |
285 | |
286 | return devm_snd_soc_register_component(dev: &pdev->dev, |
287 | component_driver: &es7241_component_driver, |
288 | dai_drv: &es7241_dai, num_dai: 1); |
289 | } |
290 | |
291 | #ifdef CONFIG_OF |
292 | static const struct of_device_id es7241_ids[] = { |
293 | { .compatible = "everest,es7241" , .data = &es7241_chip }, |
294 | { } |
295 | }; |
296 | MODULE_DEVICE_TABLE(of, es7241_ids); |
297 | #endif |
298 | |
299 | static struct platform_driver es7241_driver = { |
300 | .driver = { |
301 | .name = "es7241" , |
302 | .of_match_table = of_match_ptr(es7241_ids), |
303 | }, |
304 | .probe = es7241_probe, |
305 | }; |
306 | |
307 | module_platform_driver(es7241_driver); |
308 | |
309 | MODULE_DESCRIPTION("ASoC ES7241 audio codec driver" ); |
310 | MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>" ); |
311 | MODULE_LICENSE("GPL" ); |
312 | |