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