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a7664ab2 SW |
1 | /* Atmel PDMIC driver |
2 | * | |
3 | * Copyright (C) 2015 Atmel | |
4 | * | |
5 | * Author: Songjun Wu <songjun.wu@atmel.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 or later | |
9 | * as published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/of.h> | |
13 | #include <linux/clk.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/regmap.h> | |
17 | #include <sound/core.h> | |
18 | #include <sound/dmaengine_pcm.h> | |
19 | #include <sound/pcm_params.h> | |
20 | #include <sound/tlv.h> | |
21 | #include "atmel-pdmic.h" | |
22 | ||
23 | struct atmel_pdmic_pdata { | |
24 | u32 mic_min_freq; | |
25 | u32 mic_max_freq; | |
26 | s32 mic_offset; | |
27 | const char *card_name; | |
28 | }; | |
29 | ||
30 | struct atmel_pdmic { | |
31 | dma_addr_t phy_base; | |
32 | struct regmap *regmap; | |
33 | struct clk *pclk; | |
34 | struct clk *gclk; | |
6dea9df8 | 35 | struct device *dev; |
a7664ab2 SW |
36 | int irq; |
37 | struct snd_pcm_substream *substream; | |
38 | const struct atmel_pdmic_pdata *pdata; | |
39 | }; | |
40 | ||
41 | static const struct of_device_id atmel_pdmic_of_match[] = { | |
42 | { | |
43 | .compatible = "atmel,sama5d2-pdmic", | |
44 | }, { | |
45 | /* sentinel */ | |
46 | } | |
47 | }; | |
48 | MODULE_DEVICE_TABLE(of, atmel_pdmic_of_match); | |
49 | ||
50 | #define PDMIC_OFFSET_MAX_VAL S16_MAX | |
51 | #define PDMIC_OFFSET_MIN_VAL S16_MIN | |
52 | ||
53 | static struct atmel_pdmic_pdata *atmel_pdmic_dt_init(struct device *dev) | |
54 | { | |
55 | struct device_node *np = dev->of_node; | |
56 | struct atmel_pdmic_pdata *pdata; | |
57 | ||
58 | if (!np) { | |
59 | dev_err(dev, "device node not found\n"); | |
60 | return ERR_PTR(-EINVAL); | |
61 | } | |
62 | ||
63 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
64 | if (!pdata) | |
65 | return ERR_PTR(-ENOMEM); | |
66 | ||
67 | if (of_property_read_string(np, "atmel,model", &pdata->card_name)) | |
68 | pdata->card_name = "PDMIC"; | |
69 | ||
70 | if (of_property_read_u32(np, "atmel,mic-min-freq", | |
71 | &pdata->mic_min_freq)) { | |
72 | dev_err(dev, "failed to get mic-min-freq\n"); | |
73 | return ERR_PTR(-EINVAL); | |
74 | } | |
75 | ||
76 | if (of_property_read_u32(np, "atmel,mic-max-freq", | |
77 | &pdata->mic_max_freq)) { | |
78 | dev_err(dev, "failed to get mic-max-freq\n"); | |
79 | return ERR_PTR(-EINVAL); | |
80 | } | |
81 | ||
82 | if (pdata->mic_max_freq < pdata->mic_min_freq) { | |
83 | dev_err(dev, | |
032ca4a7 | 84 | "mic-max-freq should not be less than mic-min-freq\n"); |
a7664ab2 SW |
85 | return ERR_PTR(-EINVAL); |
86 | } | |
87 | ||
88 | if (of_property_read_s32(np, "atmel,mic-offset", &pdata->mic_offset)) | |
89 | pdata->mic_offset = 0; | |
90 | ||
91 | if (pdata->mic_offset > PDMIC_OFFSET_MAX_VAL) { | |
92 | dev_warn(dev, | |
93 | "mic-offset value %d is larger than the max value %d, the max value is specified\n", | |
94 | pdata->mic_offset, PDMIC_OFFSET_MAX_VAL); | |
95 | pdata->mic_offset = PDMIC_OFFSET_MAX_VAL; | |
96 | } else if (pdata->mic_offset < PDMIC_OFFSET_MIN_VAL) { | |
97 | dev_warn(dev, | |
98 | "mic-offset value %d is less than the min value %d, the min value is specified\n", | |
99 | pdata->mic_offset, PDMIC_OFFSET_MIN_VAL); | |
100 | pdata->mic_offset = PDMIC_OFFSET_MIN_VAL; | |
101 | } | |
102 | ||
103 | return pdata; | |
104 | } | |
105 | ||
106 | /* cpu dai component */ | |
107 | static int atmel_pdmic_cpu_dai_startup(struct snd_pcm_substream *substream, | |
108 | struct snd_soc_dai *cpu_dai) | |
109 | { | |
110 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
111 | struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); | |
112 | int ret; | |
113 | ||
114 | ret = clk_prepare_enable(dd->gclk); | |
115 | if (ret) | |
116 | return ret; | |
117 | ||
118 | ret = clk_prepare_enable(dd->pclk); | |
61743bfa WY |
119 | if (ret) { |
120 | clk_disable_unprepare(dd->gclk); | |
a7664ab2 | 121 | return ret; |
61743bfa | 122 | } |
a7664ab2 SW |
123 | |
124 | /* Clear all bits in the Control Register(PDMIC_CR) */ | |
125 | regmap_write(dd->regmap, PDMIC_CR, 0); | |
126 | ||
127 | dd->substream = substream; | |
128 | ||
129 | /* Enable the overrun error interrupt */ | |
130 | regmap_write(dd->regmap, PDMIC_IER, PDMIC_IER_OVRE); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static void atmel_pdmic_cpu_dai_shutdown(struct snd_pcm_substream *substream, | |
136 | struct snd_soc_dai *cpu_dai) | |
137 | { | |
138 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
139 | struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); | |
140 | ||
141 | /* Disable the overrun error interrupt */ | |
142 | regmap_write(dd->regmap, PDMIC_IDR, PDMIC_IDR_OVRE); | |
143 | ||
144 | clk_disable_unprepare(dd->gclk); | |
145 | clk_disable_unprepare(dd->pclk); | |
146 | } | |
147 | ||
148 | static int atmel_pdmic_cpu_dai_prepare(struct snd_pcm_substream *substream, | |
149 | struct snd_soc_dai *cpu_dai) | |
150 | { | |
151 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
152 | struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); | |
153 | u32 val; | |
154 | ||
155 | /* Clean the PDMIC Converted Data Register */ | |
156 | return regmap_read(dd->regmap, PDMIC_CDR, &val); | |
157 | } | |
158 | ||
159 | static const struct snd_soc_dai_ops atmel_pdmic_cpu_dai_ops = { | |
160 | .startup = atmel_pdmic_cpu_dai_startup, | |
161 | .shutdown = atmel_pdmic_cpu_dai_shutdown, | |
162 | .prepare = atmel_pdmic_cpu_dai_prepare, | |
163 | }; | |
164 | ||
165 | #define ATMEL_PDMIC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE) | |
166 | ||
167 | static struct snd_soc_dai_driver atmel_pdmic_cpu_dai = { | |
168 | .capture = { | |
169 | .channels_min = 1, | |
170 | .channels_max = 1, | |
171 | .rates = SNDRV_PCM_RATE_KNOT, | |
172 | .formats = ATMEL_PDMIC_FORMATS,}, | |
173 | .ops = &atmel_pdmic_cpu_dai_ops, | |
174 | }; | |
175 | ||
176 | static const struct snd_soc_component_driver atmel_pdmic_cpu_dai_component = { | |
177 | .name = "atmel-pdmic", | |
178 | }; | |
179 | ||
180 | /* platform */ | |
181 | #define ATMEL_PDMIC_MAX_BUF_SIZE (64 * 1024) | |
182 | #define ATMEL_PDMIC_PREALLOC_BUF_SIZE ATMEL_PDMIC_MAX_BUF_SIZE | |
183 | ||
184 | static const struct snd_pcm_hardware atmel_pdmic_hw = { | |
185 | .info = SNDRV_PCM_INFO_MMAP | |
186 | | SNDRV_PCM_INFO_MMAP_VALID | |
187 | | SNDRV_PCM_INFO_INTERLEAVED | |
188 | | SNDRV_PCM_INFO_RESUME | |
189 | | SNDRV_PCM_INFO_PAUSE, | |
190 | .formats = ATMEL_PDMIC_FORMATS, | |
191 | .buffer_bytes_max = ATMEL_PDMIC_MAX_BUF_SIZE, | |
192 | .period_bytes_min = 256, | |
193 | .period_bytes_max = 32 * 1024, | |
194 | .periods_min = 2, | |
195 | .periods_max = 256, | |
196 | }; | |
197 | ||
198 | static int | |
199 | atmel_pdmic_platform_configure_dma(struct snd_pcm_substream *substream, | |
200 | struct snd_pcm_hw_params *params, | |
201 | struct dma_slave_config *slave_config) | |
202 | { | |
203 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
204 | struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); | |
205 | int ret; | |
206 | ||
207 | ret = snd_hwparams_to_dma_slave_config(substream, params, | |
208 | slave_config); | |
209 | if (ret) { | |
6dea9df8 | 210 | dev_err(dd->dev, |
a7664ab2 SW |
211 | "hw params to dma slave configure failed\n"); |
212 | return ret; | |
213 | } | |
214 | ||
215 | slave_config->src_addr = dd->phy_base + PDMIC_CDR; | |
216 | slave_config->src_maxburst = 1; | |
217 | slave_config->dst_maxburst = 1; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static const struct snd_dmaengine_pcm_config | |
223 | atmel_pdmic_dmaengine_pcm_config = { | |
224 | .prepare_slave_config = atmel_pdmic_platform_configure_dma, | |
225 | .pcm_hardware = &atmel_pdmic_hw, | |
226 | .prealloc_buffer_size = ATMEL_PDMIC_PREALLOC_BUF_SIZE, | |
227 | }; | |
228 | ||
229 | /* codec */ | |
230 | /* Mic Gain = dgain * 2^(-scale) */ | |
231 | struct mic_gain { | |
232 | unsigned int dgain; | |
233 | unsigned int scale; | |
234 | }; | |
235 | ||
236 | /* range from -90 dB to 90 dB */ | |
237 | static const struct mic_gain mic_gain_table[] = { | |
238 | { 1, 15}, { 1, 14}, /* -90, -84 dB */ | |
239 | { 3, 15}, { 1, 13}, { 3, 14}, { 1, 12}, /* -81, -78, -75, -72 dB */ | |
240 | { 5, 14}, { 13, 15}, /* -70, -68 dB */ | |
241 | { 9, 14}, { 21, 15}, { 23, 15}, { 13, 14}, /* -65 ~ -62 dB */ | |
242 | { 29, 15}, { 33, 15}, { 37, 15}, { 41, 15}, /* -61 ~ -58 dB */ | |
243 | { 23, 14}, { 13, 13}, { 58, 15}, { 65, 15}, /* -57 ~ -54 dB */ | |
244 | { 73, 15}, { 41, 14}, { 23, 13}, { 13, 12}, /* -53 ~ -50 dB */ | |
245 | { 29, 13}, { 65, 14}, { 73, 14}, { 41, 13}, /* -49 ~ -46 dB */ | |
246 | { 23, 12}, { 207, 15}, { 29, 12}, { 65, 13}, /* -45 ~ -42 dB */ | |
247 | { 73, 13}, { 41, 12}, { 23, 11}, { 413, 15}, /* -41 ~ -38 dB */ | |
248 | { 463, 15}, { 519, 15}, { 583, 15}, { 327, 14}, /* -37 ~ -34 dB */ | |
249 | { 367, 14}, { 823, 15}, { 231, 13}, { 1036, 15}, /* -33 ~ -30 dB */ | |
250 | { 1163, 15}, { 1305, 15}, { 183, 12}, { 1642, 15}, /* -29 ~ -26 dB */ | |
251 | { 1843, 15}, { 2068, 15}, { 145, 11}, { 2603, 15}, /* -25 ~ -22 dB */ | |
252 | { 365, 12}, { 3277, 15}, { 3677, 15}, { 4125, 15}, /* -21 ~ -18 dB */ | |
253 | { 4629, 15}, { 5193, 15}, { 5827, 15}, { 3269, 14}, /* -17 ~ -14 dB */ | |
254 | { 917, 12}, { 8231, 15}, { 9235, 15}, { 5181, 14}, /* -13 ~ -10 dB */ | |
255 | {11627, 15}, {13045, 15}, {14637, 15}, {16423, 15}, /* -9 ~ -6 dB */ | |
256 | {18427, 15}, {20675, 15}, { 5799, 13}, {26029, 15}, /* -5 ~ -2 dB */ | |
257 | { 7301, 13}, { 1, 0}, {18383, 14}, {10313, 13}, /* -1 ~ 2 dB */ | |
258 | {23143, 14}, {25967, 14}, {29135, 14}, {16345, 13}, /* 3 ~ 6 dB */ | |
259 | { 4585, 11}, {20577, 13}, { 1443, 9}, {25905, 13}, /* 7 ~ 10 dB */ | |
260 | {14533, 12}, { 8153, 11}, { 2287, 9}, {20529, 12}, /* 11 ~ 14 dB */ | |
261 | {11517, 11}, { 6461, 10}, {28997, 12}, { 4067, 9}, /* 15 ~ 18 dB */ | |
262 | {18253, 11}, { 10, 0}, {22979, 11}, {25783, 11}, /* 19 ~ 22 dB */ | |
263 | {28929, 11}, {32459, 11}, { 9105, 9}, {20431, 10}, /* 23 ~ 26 dB */ | |
264 | {22925, 10}, {12861, 9}, { 7215, 8}, {16191, 9}, /* 27 ~ 30 dB */ | |
265 | { 9083, 8}, {20383, 9}, {11435, 8}, { 6145, 7}, /* 31 ~ 34 dB */ | |
266 | { 3599, 6}, {32305, 9}, {18123, 8}, {20335, 8}, /* 35 ~ 38 dB */ | |
267 | { 713, 3}, { 100, 0}, { 7181, 6}, { 8057, 6}, /* 39 ~ 42 dB */ | |
268 | { 565, 2}, {20287, 7}, {11381, 6}, {25539, 7}, /* 43 ~ 46 dB */ | |
269 | { 1791, 3}, { 4019, 4}, { 9019, 5}, {20239, 6}, /* 47 ~ 50 dB */ | |
270 | { 5677, 4}, {25479, 6}, { 7147, 4}, { 8019, 4}, /* 51 ~ 54 dB */ | |
271 | {17995, 5}, {20191, 5}, {11327, 4}, {12709, 4}, /* 55 ~ 58 dB */ | |
272 | { 3565, 2}, { 1000, 0}, { 1122, 0}, { 1259, 0}, /* 59 ~ 62 dB */ | |
273 | { 2825, 1}, {12679, 3}, { 7113, 2}, { 7981, 2}, /* 63 ~ 66 dB */ | |
274 | { 8955, 2}, {20095, 3}, {22547, 3}, {12649, 2}, /* 67 ~ 70 dB */ | |
275 | {28385, 3}, { 3981, 0}, {17867, 2}, {20047, 2}, /* 71 ~ 74 dB */ | |
276 | {11247, 1}, {12619, 1}, {14159, 1}, {31773, 2}, /* 75 ~ 78 dB */ | |
277 | {17825, 1}, {10000, 0}, {11220, 0}, {12589, 0}, /* 79 ~ 82 dB */ | |
278 | {28251, 1}, {15849, 0}, {17783, 0}, {19953, 0}, /* 83 ~ 86 dB */ | |
279 | {22387, 0}, {25119, 0}, {28184, 0}, {31623, 0}, /* 87 ~ 90 dB */ | |
280 | }; | |
281 | ||
282 | static const DECLARE_TLV_DB_RANGE(mic_gain_tlv, | |
283 | 0, 1, TLV_DB_SCALE_ITEM(-9000, 600, 0), | |
284 | 2, 5, TLV_DB_SCALE_ITEM(-8100, 300, 0), | |
285 | 6, 7, TLV_DB_SCALE_ITEM(-7000, 200, 0), | |
286 | 8, ARRAY_SIZE(mic_gain_table)-1, TLV_DB_SCALE_ITEM(-6500, 100, 0), | |
287 | ); | |
288 | ||
6b0ffacd | 289 | static int pdmic_get_mic_volsw(struct snd_kcontrol *kcontrol, |
a7664ab2 SW |
290 | struct snd_ctl_elem_value *ucontrol) |
291 | { | |
292 | struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); | |
293 | unsigned int dgain_val, scale_val; | |
294 | int i; | |
295 | ||
296 | dgain_val = (snd_soc_read(codec, PDMIC_DSPR1) & PDMIC_DSPR1_DGAIN_MASK) | |
297 | >> PDMIC_DSPR1_DGAIN_SHIFT; | |
298 | ||
299 | scale_val = (snd_soc_read(codec, PDMIC_DSPR0) & PDMIC_DSPR0_SCALE_MASK) | |
300 | >> PDMIC_DSPR0_SCALE_SHIFT; | |
301 | ||
302 | for (i = 0; i < ARRAY_SIZE(mic_gain_table); i++) { | |
303 | if ((mic_gain_table[i].dgain == dgain_val) && | |
304 | (mic_gain_table[i].scale == scale_val)) | |
305 | ucontrol->value.integer.value[0] = i; | |
306 | } | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | static int pdmic_put_mic_volsw(struct snd_kcontrol *kcontrol, | |
312 | struct snd_ctl_elem_value *ucontrol) | |
313 | { | |
314 | struct soc_mixer_control *mc = | |
315 | (struct soc_mixer_control *)kcontrol->private_value; | |
316 | struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); | |
317 | int max = mc->max; | |
318 | unsigned int val; | |
319 | int ret; | |
320 | ||
321 | val = ucontrol->value.integer.value[0]; | |
322 | ||
323 | if (val > max) | |
324 | return -EINVAL; | |
325 | ||
326 | ret = snd_soc_update_bits(codec, PDMIC_DSPR1, PDMIC_DSPR1_DGAIN_MASK, | |
327 | mic_gain_table[val].dgain << PDMIC_DSPR1_DGAIN_SHIFT); | |
328 | if (ret < 0) | |
329 | return ret; | |
330 | ||
331 | ret = snd_soc_update_bits(codec, PDMIC_DSPR0, PDMIC_DSPR0_SCALE_MASK, | |
332 | mic_gain_table[val].scale << PDMIC_DSPR0_SCALE_SHIFT); | |
333 | if (ret < 0) | |
334 | return ret; | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static const struct snd_kcontrol_new atmel_pdmic_snd_controls[] = { | |
340 | SOC_SINGLE_EXT_TLV("Mic Capture Volume", PDMIC_DSPR1, PDMIC_DSPR1_DGAIN_SHIFT, | |
341 | ARRAY_SIZE(mic_gain_table)-1, 0, | |
342 | pdmic_get_mic_volsw, pdmic_put_mic_volsw, mic_gain_tlv), | |
343 | ||
344 | SOC_SINGLE("High Pass Filter Switch", PDMIC_DSPR0, | |
345 | PDMIC_DSPR0_HPFBYP_SHIFT, 1, 1), | |
346 | ||
347 | SOC_SINGLE("SINCC Filter Switch", PDMIC_DSPR0, PDMIC_DSPR0_SINBYP_SHIFT, 1, 1), | |
348 | }; | |
349 | ||
350 | static int atmel_pdmic_codec_probe(struct snd_soc_codec *codec) | |
351 | { | |
352 | struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec); | |
353 | struct atmel_pdmic *dd = snd_soc_card_get_drvdata(card); | |
354 | ||
355 | snd_soc_update_bits(codec, PDMIC_DSPR1, PDMIC_DSPR1_OFFSET_MASK, | |
356 | (u32)(dd->pdata->mic_offset << PDMIC_DSPR1_OFFSET_SHIFT)); | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | static struct snd_soc_codec_driver soc_codec_dev_pdmic = { | |
362 | .probe = atmel_pdmic_codec_probe, | |
72bb3cdf KM |
363 | .component_driver = { |
364 | .controls = atmel_pdmic_snd_controls, | |
365 | .num_controls = ARRAY_SIZE(atmel_pdmic_snd_controls), | |
366 | }, | |
a7664ab2 SW |
367 | }; |
368 | ||
369 | /* codec dai component */ | |
370 | #define PDMIC_MR_PRESCAL_MAX_VAL 127 | |
371 | ||
372 | static int | |
373 | atmel_pdmic_codec_dai_hw_params(struct snd_pcm_substream *substream, | |
374 | struct snd_pcm_hw_params *params, | |
375 | struct snd_soc_dai *codec_dai) | |
376 | { | |
377 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
378 | struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card); | |
379 | struct snd_soc_codec *codec = codec_dai->codec; | |
380 | unsigned int rate_min = substream->runtime->hw.rate_min; | |
381 | unsigned int rate_max = substream->runtime->hw.rate_max; | |
382 | int fs = params_rate(params); | |
383 | int bits = params_width(params); | |
384 | unsigned long pclk_rate, gclk_rate; | |
385 | unsigned int f_pdmic; | |
386 | u32 mr_val, dspr0_val, pclk_prescal, gclk_prescal; | |
387 | ||
388 | if (params_channels(params) != 1) { | |
389 | dev_err(codec->dev, | |
390 | "only supports one channel\n"); | |
391 | return -EINVAL; | |
392 | } | |
393 | ||
394 | if ((fs < rate_min) || (fs > rate_max)) { | |
395 | dev_err(codec->dev, | |
396 | "sample rate is %dHz, min rate is %dHz, max rate is %dHz\n", | |
397 | fs, rate_min, rate_max); | |
398 | ||
399 | return -EINVAL; | |
400 | } | |
401 | ||
402 | switch (bits) { | |
403 | case 16: | |
404 | dspr0_val = (PDMIC_DSPR0_SIZE_16_BITS | |
405 | << PDMIC_DSPR0_SIZE_SHIFT); | |
406 | break; | |
407 | case 32: | |
408 | dspr0_val = (PDMIC_DSPR0_SIZE_32_BITS | |
409 | << PDMIC_DSPR0_SIZE_SHIFT); | |
410 | break; | |
411 | default: | |
412 | return -EINVAL; | |
413 | } | |
414 | ||
415 | if ((fs << 7) > (rate_max << 6)) { | |
416 | f_pdmic = fs << 6; | |
417 | dspr0_val |= PDMIC_DSPR0_OSR_64 << PDMIC_DSPR0_OSR_SHIFT; | |
418 | } else { | |
419 | f_pdmic = fs << 7; | |
420 | dspr0_val |= PDMIC_DSPR0_OSR_128 << PDMIC_DSPR0_OSR_SHIFT; | |
421 | } | |
422 | ||
423 | pclk_rate = clk_get_rate(dd->pclk); | |
424 | gclk_rate = clk_get_rate(dd->gclk); | |
425 | ||
426 | /* PRESCAL = SELCK/(2*f_pdmic) - 1*/ | |
427 | pclk_prescal = (u32)(pclk_rate/(f_pdmic << 1)) - 1; | |
428 | gclk_prescal = (u32)(gclk_rate/(f_pdmic << 1)) - 1; | |
429 | ||
430 | if ((pclk_prescal > PDMIC_MR_PRESCAL_MAX_VAL) || | |
431 | (gclk_rate/((gclk_prescal + 1) << 1) < | |
432 | pclk_rate/((pclk_prescal + 1) << 1))) { | |
433 | mr_val = gclk_prescal << PDMIC_MR_PRESCAL_SHIFT; | |
434 | mr_val |= PDMIC_MR_CLKS_GCK << PDMIC_MR_CLKS_SHIFT; | |
435 | } else { | |
436 | mr_val = pclk_prescal << PDMIC_MR_PRESCAL_SHIFT; | |
437 | mr_val |= PDMIC_MR_CLKS_PCK << PDMIC_MR_CLKS_SHIFT; | |
438 | } | |
439 | ||
440 | snd_soc_update_bits(codec, PDMIC_MR, | |
441 | PDMIC_MR_PRESCAL_MASK | PDMIC_MR_CLKS_MASK, mr_val); | |
442 | ||
443 | snd_soc_update_bits(codec, PDMIC_DSPR0, | |
444 | PDMIC_DSPR0_OSR_MASK | PDMIC_DSPR0_SIZE_MASK, dspr0_val); | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | static int atmel_pdmic_codec_dai_prepare(struct snd_pcm_substream *substream, | |
450 | struct snd_soc_dai *codec_dai) | |
451 | { | |
452 | struct snd_soc_codec *codec = codec_dai->codec; | |
453 | ||
454 | snd_soc_update_bits(codec, PDMIC_CR, PDMIC_CR_ENPDM_MASK, | |
455 | PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT); | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | static int atmel_pdmic_codec_dai_trigger(struct snd_pcm_substream *substream, | |
461 | int cmd, struct snd_soc_dai *codec_dai) | |
462 | { | |
463 | struct snd_soc_codec *codec = codec_dai->codec; | |
464 | u32 val; | |
465 | ||
466 | switch (cmd) { | |
467 | case SNDRV_PCM_TRIGGER_START: | |
468 | case SNDRV_PCM_TRIGGER_RESUME: | |
469 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
470 | val = PDMIC_CR_ENPDM_EN << PDMIC_CR_ENPDM_SHIFT; | |
471 | break; | |
472 | case SNDRV_PCM_TRIGGER_STOP: | |
473 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
474 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
475 | val = PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT; | |
476 | break; | |
477 | default: | |
478 | return -EINVAL; | |
479 | } | |
480 | ||
481 | snd_soc_update_bits(codec, PDMIC_CR, PDMIC_CR_ENPDM_MASK, val); | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | static const struct snd_soc_dai_ops atmel_pdmic_codec_dai_ops = { | |
487 | .hw_params = atmel_pdmic_codec_dai_hw_params, | |
488 | .prepare = atmel_pdmic_codec_dai_prepare, | |
489 | .trigger = atmel_pdmic_codec_dai_trigger, | |
490 | }; | |
491 | ||
492 | #define ATMEL_PDMIC_CODEC_DAI_NAME "atmel-pdmic-hifi" | |
493 | ||
494 | static struct snd_soc_dai_driver atmel_pdmic_codec_dai = { | |
495 | .name = ATMEL_PDMIC_CODEC_DAI_NAME, | |
496 | .capture = { | |
497 | .stream_name = "Capture", | |
498 | .channels_min = 1, | |
499 | .channels_max = 1, | |
500 | .rates = SNDRV_PCM_RATE_KNOT, | |
501 | .formats = ATMEL_PDMIC_FORMATS, | |
502 | }, | |
503 | .ops = &atmel_pdmic_codec_dai_ops, | |
504 | }; | |
505 | ||
506 | /* ASoC sound card */ | |
507 | static int atmel_pdmic_asoc_card_init(struct device *dev, | |
508 | struct snd_soc_card *card) | |
509 | { | |
510 | struct snd_soc_dai_link *dai_link; | |
511 | struct atmel_pdmic *dd = snd_soc_card_get_drvdata(card); | |
512 | ||
513 | dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL); | |
514 | if (!dai_link) | |
515 | return -ENOMEM; | |
516 | ||
517 | dai_link->name = "PDMIC"; | |
518 | dai_link->stream_name = "PDMIC PCM"; | |
519 | dai_link->codec_dai_name = ATMEL_PDMIC_CODEC_DAI_NAME; | |
520 | dai_link->cpu_dai_name = dev_name(dev); | |
521 | dai_link->codec_name = dev_name(dev); | |
522 | dai_link->platform_name = dev_name(dev); | |
523 | ||
524 | card->dai_link = dai_link; | |
525 | card->num_links = 1; | |
526 | card->name = dd->pdata->card_name; | |
527 | card->dev = dev; | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | static void atmel_pdmic_get_sample_rate(struct atmel_pdmic *dd, | |
533 | unsigned int *rate_min, unsigned int *rate_max) | |
534 | { | |
535 | u32 mic_min_freq = dd->pdata->mic_min_freq; | |
536 | u32 mic_max_freq = dd->pdata->mic_max_freq; | |
537 | u32 clk_max_rate = (u32)(clk_get_rate(dd->pclk) >> 1); | |
538 | u32 clk_min_rate = (u32)(clk_get_rate(dd->gclk) >> 8); | |
539 | ||
540 | if (mic_max_freq > clk_max_rate) | |
541 | mic_max_freq = clk_max_rate; | |
542 | ||
543 | if (mic_min_freq < clk_min_rate) | |
544 | mic_min_freq = clk_min_rate; | |
545 | ||
546 | *rate_min = DIV_ROUND_CLOSEST(mic_min_freq, 128); | |
547 | *rate_max = mic_max_freq >> 6; | |
548 | } | |
549 | ||
550 | /* PDMIC interrupt handler */ | |
551 | static irqreturn_t atmel_pdmic_interrupt(int irq, void *dev_id) | |
552 | { | |
553 | struct atmel_pdmic *dd = (struct atmel_pdmic *)dev_id; | |
554 | u32 pdmic_isr; | |
555 | irqreturn_t ret = IRQ_NONE; | |
556 | ||
557 | regmap_read(dd->regmap, PDMIC_ISR, &pdmic_isr); | |
558 | ||
559 | if (pdmic_isr & PDMIC_ISR_OVRE) { | |
560 | regmap_update_bits(dd->regmap, PDMIC_CR, PDMIC_CR_ENPDM_MASK, | |
561 | PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT); | |
562 | ||
563 | snd_pcm_stop_xrun(dd->substream); | |
564 | ||
565 | ret = IRQ_HANDLED; | |
566 | } | |
567 | ||
568 | return ret; | |
569 | } | |
570 | ||
571 | /* regmap configuration */ | |
572 | #define ATMEL_PDMIC_REG_MAX 0x124 | |
573 | static const struct regmap_config atmel_pdmic_regmap_config = { | |
574 | .reg_bits = 32, | |
575 | .reg_stride = 4, | |
576 | .val_bits = 32, | |
577 | .max_register = ATMEL_PDMIC_REG_MAX, | |
578 | }; | |
579 | ||
580 | static int atmel_pdmic_probe(struct platform_device *pdev) | |
581 | { | |
582 | struct device *dev = &pdev->dev; | |
583 | struct atmel_pdmic *dd; | |
584 | struct resource *res; | |
585 | void __iomem *io_base; | |
586 | const struct atmel_pdmic_pdata *pdata; | |
587 | struct snd_soc_card *card; | |
588 | unsigned int rate_min, rate_max; | |
589 | int ret; | |
590 | ||
591 | pdata = atmel_pdmic_dt_init(dev); | |
592 | if (IS_ERR(pdata)) | |
593 | return PTR_ERR(pdata); | |
594 | ||
595 | dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL); | |
596 | if (!dd) | |
597 | return -ENOMEM; | |
598 | ||
599 | dd->pdata = pdata; | |
6dea9df8 | 600 | dd->dev = dev; |
a7664ab2 SW |
601 | |
602 | dd->irq = platform_get_irq(pdev, 0); | |
603 | if (dd->irq < 0) { | |
604 | ret = dd->irq; | |
032ca4a7 | 605 | dev_err(dev, "failed to get irq: %d\n", ret); |
a7664ab2 SW |
606 | return ret; |
607 | } | |
608 | ||
609 | dd->pclk = devm_clk_get(dev, "pclk"); | |
610 | if (IS_ERR(dd->pclk)) { | |
611 | ret = PTR_ERR(dd->pclk); | |
612 | dev_err(dev, "failed to get peripheral clock: %d\n", ret); | |
613 | return ret; | |
614 | } | |
615 | ||
616 | dd->gclk = devm_clk_get(dev, "gclk"); | |
617 | if (IS_ERR(dd->gclk)) { | |
618 | ret = PTR_ERR(dd->gclk); | |
619 | dev_err(dev, "failed to get GCK: %d\n", ret); | |
620 | return ret; | |
621 | } | |
622 | ||
032ca4a7 | 623 | /* The gclk clock frequency must always be three times |
a7664ab2 SW |
624 | * lower than the pclk clock frequency |
625 | */ | |
626 | ret = clk_set_rate(dd->gclk, clk_get_rate(dd->pclk)/3); | |
627 | if (ret) { | |
628 | dev_err(dev, "failed to set GCK clock rate: %d\n", ret); | |
629 | return ret; | |
630 | } | |
631 | ||
632 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
a7664ab2 SW |
633 | io_base = devm_ioremap_resource(dev, res); |
634 | if (IS_ERR(io_base)) { | |
635 | ret = PTR_ERR(io_base); | |
636 | dev_err(dev, "failed to remap register memory: %d\n", ret); | |
637 | return ret; | |
638 | } | |
639 | ||
640 | dd->phy_base = res->start; | |
641 | ||
642 | dd->regmap = devm_regmap_init_mmio(dev, io_base, | |
643 | &atmel_pdmic_regmap_config); | |
644 | if (IS_ERR(dd->regmap)) { | |
645 | ret = PTR_ERR(dd->regmap); | |
646 | dev_err(dev, "failed to init register map: %d\n", ret); | |
647 | return ret; | |
648 | } | |
649 | ||
650 | ret = devm_request_irq(dev, dd->irq, atmel_pdmic_interrupt, 0, | |
651 | "PDMIC", (void *)dd); | |
652 | if (ret < 0) { | |
653 | dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n", | |
654 | dd->irq, ret); | |
655 | return ret; | |
656 | } | |
657 | ||
032ca4a7 | 658 | /* Get the minimal and maximal sample rate that the microphone supports */ |
a7664ab2 SW |
659 | atmel_pdmic_get_sample_rate(dd, &rate_min, &rate_max); |
660 | ||
661 | /* register cpu dai */ | |
662 | atmel_pdmic_cpu_dai.capture.rate_min = rate_min; | |
663 | atmel_pdmic_cpu_dai.capture.rate_max = rate_max; | |
664 | ret = devm_snd_soc_register_component(dev, | |
665 | &atmel_pdmic_cpu_dai_component, | |
666 | &atmel_pdmic_cpu_dai, 1); | |
667 | if (ret) { | |
668 | dev_err(dev, "could not register CPU DAI: %d\n", ret); | |
669 | return ret; | |
670 | } | |
671 | ||
672 | /* register platform */ | |
673 | ret = devm_snd_dmaengine_pcm_register(dev, | |
674 | &atmel_pdmic_dmaengine_pcm_config, | |
675 | 0); | |
676 | if (ret) { | |
677 | dev_err(dev, "could not register platform: %d\n", ret); | |
678 | return ret; | |
679 | } | |
680 | ||
681 | /* register codec and codec dai */ | |
682 | atmel_pdmic_codec_dai.capture.rate_min = rate_min; | |
683 | atmel_pdmic_codec_dai.capture.rate_max = rate_max; | |
684 | ret = snd_soc_register_codec(dev, &soc_codec_dev_pdmic, | |
685 | &atmel_pdmic_codec_dai, 1); | |
686 | if (ret) { | |
687 | dev_err(dev, "could not register codec: %d\n", ret); | |
688 | return ret; | |
689 | } | |
690 | ||
691 | /* register sound card */ | |
692 | card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); | |
693 | if (!card) { | |
694 | ret = -ENOMEM; | |
695 | goto unregister_codec; | |
696 | } | |
697 | ||
698 | snd_soc_card_set_drvdata(card, dd); | |
a7664ab2 SW |
699 | |
700 | ret = atmel_pdmic_asoc_card_init(dev, card); | |
701 | if (ret) { | |
702 | dev_err(dev, "failed to init sound card: %d\n", ret); | |
703 | goto unregister_codec; | |
704 | } | |
705 | ||
706 | ret = devm_snd_soc_register_card(dev, card); | |
707 | if (ret) { | |
708 | dev_err(dev, "failed to register sound card: %d\n", ret); | |
709 | goto unregister_codec; | |
710 | } | |
711 | ||
712 | return 0; | |
713 | ||
714 | unregister_codec: | |
715 | snd_soc_unregister_codec(dev); | |
716 | return ret; | |
717 | } | |
718 | ||
719 | static int atmel_pdmic_remove(struct platform_device *pdev) | |
720 | { | |
721 | snd_soc_unregister_codec(&pdev->dev); | |
722 | return 0; | |
723 | } | |
724 | ||
725 | static struct platform_driver atmel_pdmic_driver = { | |
726 | .driver = { | |
727 | .name = "atmel-pdmic", | |
728 | .of_match_table = of_match_ptr(atmel_pdmic_of_match), | |
729 | .pm = &snd_soc_pm_ops, | |
730 | }, | |
731 | .probe = atmel_pdmic_probe, | |
732 | .remove = atmel_pdmic_remove, | |
733 | }; | |
734 | module_platform_driver(atmel_pdmic_driver); | |
735 | ||
736 | MODULE_DESCRIPTION("Atmel PDMIC driver under ALSA SoC architecture"); | |
737 | MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>"); | |
738 | MODULE_LICENSE("GPL v2"); |