1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 // Copyright 2018 NXP
3
4 #include <linux/bitfield.h>
5 #include <linux/clk.h>
6 #include <linux/device.h>
7 #include <linux/interrupt.h>
8 #include <linux/kobject.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/of_address.h>
13 #include <linux/of_irq.h>
14 #include <linux/of_platform.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/regmap.h>
17 #include <linux/sysfs.h>
18 #include <linux/types.h>
19 #include <linux/dma/imx-dma.h>
20 #include <sound/dmaengine_pcm.h>
21 #include <sound/pcm.h>
22 #include <sound/soc.h>
23 #include <sound/tlv.h>
24 #include <sound/core.h>
25
26 #include "fsl_micfil.h"
27 #include "fsl_utils.h"
28
29 #define MICFIL_OSR_DEFAULT 16
30
31 #define MICFIL_NUM_RATES 7
32 #define MICFIL_CLK_SRC_NUM 3
33 /* clock source ids */
34 #define MICFIL_AUDIO_PLL1 0
35 #define MICFIL_AUDIO_PLL2 1
36 #define MICFIL_CLK_EXT3 2
37
38 enum quality {
39 QUALITY_HIGH,
40 QUALITY_MEDIUM,
41 QUALITY_LOW,
42 QUALITY_VLOW0,
43 QUALITY_VLOW1,
44 QUALITY_VLOW2,
45 };
46
47 struct fsl_micfil {
48 struct platform_device *pdev;
49 struct regmap *regmap;
50 const struct fsl_micfil_soc_data *soc;
51 struct clk *busclk;
52 struct clk *mclk;
53 struct clk *pll8k_clk;
54 struct clk *pll11k_clk;
55 struct clk *clk_src[MICFIL_CLK_SRC_NUM];
56 struct snd_dmaengine_dai_dma_data dma_params_rx;
57 struct sdma_peripheral_config sdmacfg;
58 struct snd_soc_card *card;
59 struct snd_pcm_hw_constraint_list constraint_rates;
60 unsigned int constraint_rates_list[MICFIL_NUM_RATES];
61 unsigned int dataline;
62 char name[32];
63 int irq[MICFIL_IRQ_LINES];
64 enum quality quality;
65 int dc_remover;
66 int vad_init_mode;
67 int vad_enabled;
68 int vad_detected;
69 struct fsl_micfil_verid verid;
70 struct fsl_micfil_param param;
71 };
72
73 struct fsl_micfil_soc_data {
74 unsigned int fifos;
75 unsigned int fifo_depth;
76 unsigned int dataline;
77 bool imx;
78 bool use_edma;
79 bool use_verid;
80 bool volume_sx;
81 u64 formats;
82 };
83
84 static struct fsl_micfil_soc_data fsl_micfil_imx8mm = {
85 .imx = true,
86 .fifos = 8,
87 .fifo_depth = 8,
88 .dataline = 0xf,
89 .formats = SNDRV_PCM_FMTBIT_S16_LE,
90 .volume_sx = true,
91 };
92
93 static struct fsl_micfil_soc_data fsl_micfil_imx8mp = {
94 .imx = true,
95 .fifos = 8,
96 .fifo_depth = 32,
97 .dataline = 0xf,
98 .formats = SNDRV_PCM_FMTBIT_S32_LE,
99 .volume_sx = false,
100 };
101
102 static struct fsl_micfil_soc_data fsl_micfil_imx93 = {
103 .imx = true,
104 .fifos = 8,
105 .fifo_depth = 32,
106 .dataline = 0xf,
107 .formats = SNDRV_PCM_FMTBIT_S32_LE,
108 .use_edma = true,
109 .use_verid = true,
110 .volume_sx = false,
111 };
112
113 static const struct of_device_id fsl_micfil_dt_ids[] = {
114 { .compatible = "fsl,imx8mm-micfil", .data = &fsl_micfil_imx8mm },
115 { .compatible = "fsl,imx8mp-micfil", .data = &fsl_micfil_imx8mp },
116 { .compatible = "fsl,imx93-micfil", .data = &fsl_micfil_imx93 },
117 {}
118 };
119 MODULE_DEVICE_TABLE(of, fsl_micfil_dt_ids);
120
121 static const char * const micfil_quality_select_texts[] = {
122 [QUALITY_HIGH] = "High",
123 [QUALITY_MEDIUM] = "Medium",
124 [QUALITY_LOW] = "Low",
125 [QUALITY_VLOW0] = "VLow0",
126 [QUALITY_VLOW1] = "Vlow1",
127 [QUALITY_VLOW2] = "Vlow2",
128 };
129
130 static const struct soc_enum fsl_micfil_quality_enum =
131 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(micfil_quality_select_texts),
132 micfil_quality_select_texts);
133
134 static DECLARE_TLV_DB_SCALE(gain_tlv, 0, 100, 0);
135
micfil_set_quality(struct fsl_micfil * micfil)136 static int micfil_set_quality(struct fsl_micfil *micfil)
137 {
138 u32 qsel;
139
140 switch (micfil->quality) {
141 case QUALITY_HIGH:
142 qsel = MICFIL_QSEL_HIGH_QUALITY;
143 break;
144 case QUALITY_MEDIUM:
145 qsel = MICFIL_QSEL_MEDIUM_QUALITY;
146 break;
147 case QUALITY_LOW:
148 qsel = MICFIL_QSEL_LOW_QUALITY;
149 break;
150 case QUALITY_VLOW0:
151 qsel = MICFIL_QSEL_VLOW0_QUALITY;
152 break;
153 case QUALITY_VLOW1:
154 qsel = MICFIL_QSEL_VLOW1_QUALITY;
155 break;
156 case QUALITY_VLOW2:
157 qsel = MICFIL_QSEL_VLOW2_QUALITY;
158 break;
159 }
160
161 return regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
162 MICFIL_CTRL2_QSEL,
163 FIELD_PREP(MICFIL_CTRL2_QSEL, qsel));
164 }
165
micfil_quality_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)166 static int micfil_quality_get(struct snd_kcontrol *kcontrol,
167 struct snd_ctl_elem_value *ucontrol)
168 {
169 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
170 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(cmpnt);
171
172 ucontrol->value.integer.value[0] = micfil->quality;
173
174 return 0;
175 }
176
micfil_quality_set(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)177 static int micfil_quality_set(struct snd_kcontrol *kcontrol,
178 struct snd_ctl_elem_value *ucontrol)
179 {
180 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
181 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(cmpnt);
182
183 micfil->quality = ucontrol->value.integer.value[0];
184
185 return micfil_set_quality(micfil);
186 }
187
188 static const char * const micfil_hwvad_enable[] = {
189 "Disable (Record only)",
190 "Enable (Record with Vad)",
191 };
192
193 static const char * const micfil_hwvad_init_mode[] = {
194 "Envelope mode", "Energy mode",
195 };
196
197 static const char * const micfil_hwvad_hpf_texts[] = {
198 "Filter bypass",
199 "Cut-off @1750Hz",
200 "Cut-off @215Hz",
201 "Cut-off @102Hz",
202 };
203
204 /*
205 * DC Remover Control
206 * Filter Bypassed 1 1
207 * Cut-off @21Hz 0 0
208 * Cut-off @83Hz 0 1
209 * Cut-off @152HZ 1 0
210 */
211 static const char * const micfil_dc_remover_texts[] = {
212 "Cut-off @21Hz", "Cut-off @83Hz",
213 "Cut-off @152Hz", "Bypass",
214 };
215
216 static const struct soc_enum hwvad_enable_enum =
217 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(micfil_hwvad_enable),
218 micfil_hwvad_enable);
219 static const struct soc_enum hwvad_init_mode_enum =
220 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(micfil_hwvad_init_mode),
221 micfil_hwvad_init_mode);
222 static const struct soc_enum hwvad_hpf_enum =
223 SOC_ENUM_SINGLE(REG_MICFIL_VAD0_CTRL2, 0,
224 ARRAY_SIZE(micfil_hwvad_hpf_texts),
225 micfil_hwvad_hpf_texts);
226 static const struct soc_enum fsl_micfil_dc_remover_enum =
227 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(micfil_dc_remover_texts),
228 micfil_dc_remover_texts);
229
micfil_put_dc_remover_state(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)230 static int micfil_put_dc_remover_state(struct snd_kcontrol *kcontrol,
231 struct snd_ctl_elem_value *ucontrol)
232 {
233 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
234 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
235 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(comp);
236 unsigned int *item = ucontrol->value.enumerated.item;
237 int val = snd_soc_enum_item_to_val(e, item[0]);
238 int i = 0, ret = 0;
239 u32 reg_val = 0;
240
241 if (val < 0 || val > 3)
242 return -EINVAL;
243
244 micfil->dc_remover = val;
245
246 /* Calculate total value for all channels */
247 for (i = 0; i < MICFIL_OUTPUT_CHANNELS; i++)
248 reg_val |= val << MICFIL_DC_CHX_SHIFT(i);
249
250 /* Update DC Remover mode for all channels */
251 ret = snd_soc_component_update_bits(comp, REG_MICFIL_DC_CTRL,
252 MICFIL_DC_CTRL_CONFIG, reg_val);
253 if (ret < 0)
254 return ret;
255
256 return 0;
257 }
258
micfil_get_dc_remover_state(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)259 static int micfil_get_dc_remover_state(struct snd_kcontrol *kcontrol,
260 struct snd_ctl_elem_value *ucontrol)
261 {
262 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
263 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(comp);
264
265 ucontrol->value.enumerated.item[0] = micfil->dc_remover;
266
267 return 0;
268 }
269
hwvad_put_enable(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)270 static int hwvad_put_enable(struct snd_kcontrol *kcontrol,
271 struct snd_ctl_elem_value *ucontrol)
272 {
273 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
274 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
275 unsigned int *item = ucontrol->value.enumerated.item;
276 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(comp);
277 int val = snd_soc_enum_item_to_val(e, item[0]);
278
279 micfil->vad_enabled = val;
280
281 return 0;
282 }
283
hwvad_get_enable(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)284 static int hwvad_get_enable(struct snd_kcontrol *kcontrol,
285 struct snd_ctl_elem_value *ucontrol)
286 {
287 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
288 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(comp);
289
290 ucontrol->value.enumerated.item[0] = micfil->vad_enabled;
291
292 return 0;
293 }
294
hwvad_put_init_mode(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)295 static int hwvad_put_init_mode(struct snd_kcontrol *kcontrol,
296 struct snd_ctl_elem_value *ucontrol)
297 {
298 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
299 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
300 unsigned int *item = ucontrol->value.enumerated.item;
301 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(comp);
302 int val = snd_soc_enum_item_to_val(e, item[0]);
303
304 /* 0 - Envelope-based Mode
305 * 1 - Energy-based Mode
306 */
307 micfil->vad_init_mode = val;
308
309 return 0;
310 }
311
hwvad_get_init_mode(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)312 static int hwvad_get_init_mode(struct snd_kcontrol *kcontrol,
313 struct snd_ctl_elem_value *ucontrol)
314 {
315 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
316 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(comp);
317
318 ucontrol->value.enumerated.item[0] = micfil->vad_init_mode;
319
320 return 0;
321 }
322
hwvad_detected(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)323 static int hwvad_detected(struct snd_kcontrol *kcontrol,
324 struct snd_ctl_elem_value *ucontrol)
325 {
326 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
327 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(comp);
328
329 ucontrol->value.enumerated.item[0] = micfil->vad_detected;
330
331 return 0;
332 }
333
334 static const struct snd_kcontrol_new fsl_micfil_volume_controls[] = {
335 SOC_SINGLE_TLV("CH0 Volume", REG_MICFIL_OUT_CTRL,
336 MICFIL_OUTGAIN_CHX_SHIFT(0), 0xF, 0, gain_tlv),
337 SOC_SINGLE_TLV("CH1 Volume", REG_MICFIL_OUT_CTRL,
338 MICFIL_OUTGAIN_CHX_SHIFT(1), 0xF, 0, gain_tlv),
339 SOC_SINGLE_TLV("CH2 Volume", REG_MICFIL_OUT_CTRL,
340 MICFIL_OUTGAIN_CHX_SHIFT(2), 0xF, 0, gain_tlv),
341 SOC_SINGLE_TLV("CH3 Volume", REG_MICFIL_OUT_CTRL,
342 MICFIL_OUTGAIN_CHX_SHIFT(3), 0xF, 0, gain_tlv),
343 SOC_SINGLE_TLV("CH4 Volume", REG_MICFIL_OUT_CTRL,
344 MICFIL_OUTGAIN_CHX_SHIFT(4), 0xF, 0, gain_tlv),
345 SOC_SINGLE_TLV("CH5 Volume", REG_MICFIL_OUT_CTRL,
346 MICFIL_OUTGAIN_CHX_SHIFT(5), 0xF, 0, gain_tlv),
347 SOC_SINGLE_TLV("CH6 Volume", REG_MICFIL_OUT_CTRL,
348 MICFIL_OUTGAIN_CHX_SHIFT(6), 0xF, 0, gain_tlv),
349 SOC_SINGLE_TLV("CH7 Volume", REG_MICFIL_OUT_CTRL,
350 MICFIL_OUTGAIN_CHX_SHIFT(7), 0xF, 0, gain_tlv),
351 };
352
353 static const struct snd_kcontrol_new fsl_micfil_volume_sx_controls[] = {
354 SOC_SINGLE_SX_TLV("CH0 Volume", REG_MICFIL_OUT_CTRL,
355 MICFIL_OUTGAIN_CHX_SHIFT(0), 0x8, 0xF, gain_tlv),
356 SOC_SINGLE_SX_TLV("CH1 Volume", REG_MICFIL_OUT_CTRL,
357 MICFIL_OUTGAIN_CHX_SHIFT(1), 0x8, 0xF, gain_tlv),
358 SOC_SINGLE_SX_TLV("CH2 Volume", REG_MICFIL_OUT_CTRL,
359 MICFIL_OUTGAIN_CHX_SHIFT(2), 0x8, 0xF, gain_tlv),
360 SOC_SINGLE_SX_TLV("CH3 Volume", REG_MICFIL_OUT_CTRL,
361 MICFIL_OUTGAIN_CHX_SHIFT(3), 0x8, 0xF, gain_tlv),
362 SOC_SINGLE_SX_TLV("CH4 Volume", REG_MICFIL_OUT_CTRL,
363 MICFIL_OUTGAIN_CHX_SHIFT(4), 0x8, 0xF, gain_tlv),
364 SOC_SINGLE_SX_TLV("CH5 Volume", REG_MICFIL_OUT_CTRL,
365 MICFIL_OUTGAIN_CHX_SHIFT(5), 0x8, 0xF, gain_tlv),
366 SOC_SINGLE_SX_TLV("CH6 Volume", REG_MICFIL_OUT_CTRL,
367 MICFIL_OUTGAIN_CHX_SHIFT(6), 0x8, 0xF, gain_tlv),
368 SOC_SINGLE_SX_TLV("CH7 Volume", REG_MICFIL_OUT_CTRL,
369 MICFIL_OUTGAIN_CHX_SHIFT(7), 0x8, 0xF, gain_tlv),
370 };
371
372 static const struct snd_kcontrol_new fsl_micfil_snd_controls[] = {
373 SOC_ENUM_EXT("MICFIL Quality Select",
374 fsl_micfil_quality_enum,
375 micfil_quality_get, micfil_quality_set),
376 SOC_ENUM_EXT("HWVAD Enablement Switch", hwvad_enable_enum,
377 hwvad_get_enable, hwvad_put_enable),
378 SOC_ENUM_EXT("HWVAD Initialization Mode", hwvad_init_mode_enum,
379 hwvad_get_init_mode, hwvad_put_init_mode),
380 SOC_ENUM("HWVAD High-Pass Filter", hwvad_hpf_enum),
381 SOC_SINGLE("HWVAD ZCD Switch", REG_MICFIL_VAD0_ZCD, 0, 1, 0),
382 SOC_SINGLE("HWVAD ZCD Auto Threshold Switch",
383 REG_MICFIL_VAD0_ZCD, 2, 1, 0),
384 SOC_ENUM_EXT("MICFIL DC Remover Control", fsl_micfil_dc_remover_enum,
385 micfil_get_dc_remover_state, micfil_put_dc_remover_state),
386 SOC_SINGLE("HWVAD Input Gain", REG_MICFIL_VAD0_CTRL2, 8, 15, 0),
387 SOC_SINGLE("HWVAD Sound Gain", REG_MICFIL_VAD0_SCONFIG, 0, 15, 0),
388 SOC_SINGLE("HWVAD Noise Gain", REG_MICFIL_VAD0_NCONFIG, 0, 15, 0),
389 SOC_SINGLE_RANGE("HWVAD Detector Frame Time", REG_MICFIL_VAD0_CTRL2, 16, 0, 63, 0),
390 SOC_SINGLE("HWVAD Detector Initialization Time", REG_MICFIL_VAD0_CTRL1, 8, 31, 0),
391 SOC_SINGLE("HWVAD Noise Filter Adjustment", REG_MICFIL_VAD0_NCONFIG, 8, 31, 0),
392 SOC_SINGLE("HWVAD ZCD Threshold", REG_MICFIL_VAD0_ZCD, 16, 1023, 0),
393 SOC_SINGLE("HWVAD ZCD Adjustment", REG_MICFIL_VAD0_ZCD, 8, 15, 0),
394 SOC_SINGLE("HWVAD ZCD And Behavior Switch",
395 REG_MICFIL_VAD0_ZCD, 4, 1, 0),
396 SOC_SINGLE_BOOL_EXT("VAD Detected", 0, hwvad_detected, NULL),
397 };
398
fsl_micfil_use_verid(struct device * dev)399 static int fsl_micfil_use_verid(struct device *dev)
400 {
401 struct fsl_micfil *micfil = dev_get_drvdata(dev);
402 unsigned int val;
403 int ret;
404
405 if (!micfil->soc->use_verid)
406 return 0;
407
408 ret = regmap_read(micfil->regmap, REG_MICFIL_VERID, &val);
409 if (ret < 0)
410 return ret;
411
412 dev_dbg(dev, "VERID: 0x%016X\n", val);
413
414 micfil->verid.version = val &
415 (MICFIL_VERID_MAJOR_MASK | MICFIL_VERID_MINOR_MASK);
416 micfil->verid.version >>= MICFIL_VERID_MINOR_SHIFT;
417 micfil->verid.feature = val & MICFIL_VERID_FEATURE_MASK;
418
419 ret = regmap_read(micfil->regmap, REG_MICFIL_PARAM, &val);
420 if (ret < 0)
421 return ret;
422
423 dev_dbg(dev, "PARAM: 0x%016X\n", val);
424
425 micfil->param.hwvad_num = (val & MICFIL_PARAM_NUM_HWVAD_MASK) >>
426 MICFIL_PARAM_NUM_HWVAD_SHIFT;
427 micfil->param.hwvad_zcd = val & MICFIL_PARAM_HWVAD_ZCD;
428 micfil->param.hwvad_energy_mode = val & MICFIL_PARAM_HWVAD_ENERGY_MODE;
429 micfil->param.hwvad = val & MICFIL_PARAM_HWVAD;
430 micfil->param.dc_out_bypass = val & MICFIL_PARAM_DC_OUT_BYPASS;
431 micfil->param.dc_in_bypass = val & MICFIL_PARAM_DC_IN_BYPASS;
432 micfil->param.low_power = val & MICFIL_PARAM_LOW_POWER;
433 micfil->param.fil_out_width = val & MICFIL_PARAM_FIL_OUT_WIDTH;
434 micfil->param.fifo_ptrwid = (val & MICFIL_PARAM_FIFO_PTRWID_MASK) >>
435 MICFIL_PARAM_FIFO_PTRWID_SHIFT;
436 micfil->param.npair = (val & MICFIL_PARAM_NPAIR_MASK) >>
437 MICFIL_PARAM_NPAIR_SHIFT;
438
439 return 0;
440 }
441
442 /* The SRES is a self-negated bit which provides the CPU with the
443 * capability to initialize the PDM Interface module through the
444 * slave-bus interface. This bit always reads as zero, and this
445 * bit is only effective when MDIS is cleared
446 */
fsl_micfil_reset(struct device * dev)447 static int fsl_micfil_reset(struct device *dev)
448 {
449 struct fsl_micfil *micfil = dev_get_drvdata(dev);
450 int ret;
451
452 ret = regmap_clear_bits(micfil->regmap, REG_MICFIL_CTRL1,
453 MICFIL_CTRL1_MDIS);
454 if (ret)
455 return ret;
456
457 ret = regmap_set_bits(micfil->regmap, REG_MICFIL_CTRL1,
458 MICFIL_CTRL1_SRES);
459 if (ret)
460 return ret;
461
462 /*
463 * SRES is self-cleared bit, but REG_MICFIL_CTRL1 is defined
464 * as non-volatile register, so SRES still remain in regmap
465 * cache after set, that every update of REG_MICFIL_CTRL1,
466 * software reset happens. so clear it explicitly.
467 */
468 ret = regmap_clear_bits(micfil->regmap, REG_MICFIL_CTRL1,
469 MICFIL_CTRL1_SRES);
470 if (ret)
471 return ret;
472
473 /*
474 * Set SRES should clear CHnF flags, But even add delay here
475 * the CHnF may not be cleared sometimes, so clear CHnF explicitly.
476 */
477 ret = regmap_write_bits(micfil->regmap, REG_MICFIL_STAT, 0xFF, 0xFF);
478 if (ret)
479 return ret;
480
481 return 0;
482 }
483
fsl_micfil_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)484 static int fsl_micfil_startup(struct snd_pcm_substream *substream,
485 struct snd_soc_dai *dai)
486 {
487 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
488 unsigned int rates[MICFIL_NUM_RATES] = {8000, 11025, 16000, 22050, 32000, 44100, 48000};
489 int i, j, k = 0;
490 u64 clk_rate;
491
492 if (!micfil) {
493 dev_err(dai->dev, "micfil dai priv_data not set\n");
494 return -EINVAL;
495 }
496
497 micfil->constraint_rates.list = micfil->constraint_rates_list;
498 micfil->constraint_rates.count = 0;
499
500 for (j = 0; j < MICFIL_NUM_RATES; j++) {
501 for (i = 0; i < MICFIL_CLK_SRC_NUM; i++) {
502 clk_rate = clk_get_rate(micfil->clk_src[i]);
503 if (clk_rate != 0 && do_div(clk_rate, rates[j]) == 0) {
504 micfil->constraint_rates_list[k++] = rates[j];
505 micfil->constraint_rates.count++;
506 break;
507 }
508 }
509 }
510
511 if (micfil->constraint_rates.count > 0)
512 snd_pcm_hw_constraint_list(substream->runtime, 0,
513 SNDRV_PCM_HW_PARAM_RATE,
514 &micfil->constraint_rates);
515
516 return 0;
517 }
518
519 /* Enable/disable hwvad interrupts */
fsl_micfil_configure_hwvad_interrupts(struct fsl_micfil * micfil,int enable)520 static int fsl_micfil_configure_hwvad_interrupts(struct fsl_micfil *micfil, int enable)
521 {
522 u32 vadie_reg = enable ? MICFIL_VAD0_CTRL1_IE : 0;
523 u32 vaderie_reg = enable ? MICFIL_VAD0_CTRL1_ERIE : 0;
524
525 /* Voice Activity Detector Error Interruption */
526 regmap_update_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
527 MICFIL_VAD0_CTRL1_ERIE, vaderie_reg);
528
529 /* Voice Activity Detector Interruption */
530 regmap_update_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
531 MICFIL_VAD0_CTRL1_IE, vadie_reg);
532
533 return 0;
534 }
535
536 /* Configuration done only in energy-based initialization mode */
fsl_micfil_init_hwvad_energy_mode(struct fsl_micfil * micfil)537 static int fsl_micfil_init_hwvad_energy_mode(struct fsl_micfil *micfil)
538 {
539 /* Keep the VADFRENDIS bitfield cleared. */
540 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL2,
541 MICFIL_VAD0_CTRL2_FRENDIS);
542
543 /* Keep the VADPREFEN bitfield cleared. */
544 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL2,
545 MICFIL_VAD0_CTRL2_PREFEN);
546
547 /* Keep the VADSFILEN bitfield cleared. */
548 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_SCONFIG,
549 MICFIL_VAD0_SCONFIG_SFILEN);
550
551 /* Keep the VADSMAXEN bitfield cleared. */
552 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_SCONFIG,
553 MICFIL_VAD0_SCONFIG_SMAXEN);
554
555 /* Keep the VADNFILAUTO bitfield asserted. */
556 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_NCONFIG,
557 MICFIL_VAD0_NCONFIG_NFILAUT);
558
559 /* Keep the VADNMINEN bitfield cleared. */
560 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_NCONFIG,
561 MICFIL_VAD0_NCONFIG_NMINEN);
562
563 /* Keep the VADNDECEN bitfield cleared. */
564 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_NCONFIG,
565 MICFIL_VAD0_NCONFIG_NDECEN);
566
567 /* Keep the VADNOREN bitfield cleared. */
568 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_NCONFIG,
569 MICFIL_VAD0_NCONFIG_NOREN);
570
571 return 0;
572 }
573
574 /* Configuration done only in envelope-based initialization mode */
fsl_micfil_init_hwvad_envelope_mode(struct fsl_micfil * micfil)575 static int fsl_micfil_init_hwvad_envelope_mode(struct fsl_micfil *micfil)
576 {
577 /* Assert the VADFRENDIS bitfield */
578 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL2,
579 MICFIL_VAD0_CTRL2_FRENDIS);
580
581 /* Assert the VADPREFEN bitfield. */
582 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL2,
583 MICFIL_VAD0_CTRL2_PREFEN);
584
585 /* Assert the VADSFILEN bitfield. */
586 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_SCONFIG,
587 MICFIL_VAD0_SCONFIG_SFILEN);
588
589 /* Assert the VADSMAXEN bitfield. */
590 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_SCONFIG,
591 MICFIL_VAD0_SCONFIG_SMAXEN);
592
593 /* Clear the VADNFILAUTO bitfield */
594 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_NCONFIG,
595 MICFIL_VAD0_NCONFIG_NFILAUT);
596
597 /* Assert the VADNMINEN bitfield. */
598 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_NCONFIG,
599 MICFIL_VAD0_NCONFIG_NMINEN);
600
601 /* Assert the VADNDECEN bitfield. */
602 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_NCONFIG,
603 MICFIL_VAD0_NCONFIG_NDECEN);
604
605 /* Assert VADNOREN bitfield. */
606 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_NCONFIG,
607 MICFIL_VAD0_NCONFIG_NOREN);
608
609 return 0;
610 }
611
612 /*
613 * Hardware Voice Active Detection: The HWVAD takes data from the input
614 * of a selected PDM microphone to detect if there is any
615 * voice activity. When a voice activity is detected, an interrupt could
616 * be delivered to the system. Initialization in section 8.4:
617 * Can work in two modes:
618 * -> Eneveope-based mode (section 8.4.1)
619 * -> Energy-based mode (section 8.4.2)
620 *
621 * It is important to remark that the HWVAD detector could be enabled
622 * or reset only when the MICFIL isn't running i.e. when the BSY_FIL
623 * bit in STAT register is cleared
624 */
fsl_micfil_hwvad_enable(struct fsl_micfil * micfil)625 static int fsl_micfil_hwvad_enable(struct fsl_micfil *micfil)
626 {
627 int ret;
628
629 micfil->vad_detected = 0;
630
631 /* envelope-based specific initialization */
632 if (micfil->vad_init_mode == MICFIL_HWVAD_ENVELOPE_MODE)
633 ret = fsl_micfil_init_hwvad_envelope_mode(micfil);
634 else
635 ret = fsl_micfil_init_hwvad_energy_mode(micfil);
636 if (ret)
637 return ret;
638
639 /* Voice Activity Detector Internal Filters Initialization*/
640 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
641 MICFIL_VAD0_CTRL1_ST10);
642
643 /* Voice Activity Detector Internal Filter */
644 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
645 MICFIL_VAD0_CTRL1_ST10);
646
647 /* Enable Interrupts */
648 ret = fsl_micfil_configure_hwvad_interrupts(micfil, 1);
649 if (ret)
650 return ret;
651
652 /* Voice Activity Detector Reset */
653 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
654 MICFIL_VAD0_CTRL1_RST);
655
656 /* Voice Activity Detector Enabled */
657 regmap_set_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
658 MICFIL_VAD0_CTRL1_EN);
659
660 return 0;
661 }
662
fsl_micfil_hwvad_disable(struct fsl_micfil * micfil)663 static int fsl_micfil_hwvad_disable(struct fsl_micfil *micfil)
664 {
665 struct device *dev = &micfil->pdev->dev;
666 int ret = 0;
667
668 /* Disable HWVAD */
669 regmap_clear_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
670 MICFIL_VAD0_CTRL1_EN);
671
672 /* Disable hwvad interrupts */
673 ret = fsl_micfil_configure_hwvad_interrupts(micfil, 0);
674 if (ret)
675 dev_err(dev, "Failed to disable interrupts\n");
676
677 return ret;
678 }
679
fsl_micfil_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)680 static int fsl_micfil_trigger(struct snd_pcm_substream *substream, int cmd,
681 struct snd_soc_dai *dai)
682 {
683 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
684 struct device *dev = &micfil->pdev->dev;
685 int ret;
686
687 switch (cmd) {
688 case SNDRV_PCM_TRIGGER_START:
689 case SNDRV_PCM_TRIGGER_RESUME:
690 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
691 ret = fsl_micfil_reset(dev);
692 if (ret) {
693 dev_err(dev, "failed to soft reset\n");
694 return ret;
695 }
696
697 /* DMA Interrupt Selection - DISEL bits
698 * 00 - DMA and IRQ disabled
699 * 01 - DMA req enabled
700 * 10 - IRQ enabled
701 * 11 - reserved
702 */
703 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
704 MICFIL_CTRL1_DISEL,
705 FIELD_PREP(MICFIL_CTRL1_DISEL, MICFIL_CTRL1_DISEL_DMA));
706 if (ret)
707 return ret;
708
709 /* Enable the module */
710 ret = regmap_set_bits(micfil->regmap, REG_MICFIL_CTRL1,
711 MICFIL_CTRL1_PDMIEN);
712 if (ret)
713 return ret;
714
715 if (micfil->vad_enabled)
716 fsl_micfil_hwvad_enable(micfil);
717
718 break;
719 case SNDRV_PCM_TRIGGER_STOP:
720 case SNDRV_PCM_TRIGGER_SUSPEND:
721 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
722 if (micfil->vad_enabled)
723 fsl_micfil_hwvad_disable(micfil);
724
725 /* Disable the module */
726 ret = regmap_clear_bits(micfil->regmap, REG_MICFIL_CTRL1,
727 MICFIL_CTRL1_PDMIEN);
728 if (ret)
729 return ret;
730
731 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
732 MICFIL_CTRL1_DISEL,
733 FIELD_PREP(MICFIL_CTRL1_DISEL, MICFIL_CTRL1_DISEL_DISABLE));
734 if (ret)
735 return ret;
736 break;
737 default:
738 return -EINVAL;
739 }
740 return 0;
741 }
742
fsl_micfil_reparent_rootclk(struct fsl_micfil * micfil,unsigned int sample_rate)743 static int fsl_micfil_reparent_rootclk(struct fsl_micfil *micfil, unsigned int sample_rate)
744 {
745 struct device *dev = &micfil->pdev->dev;
746 u64 ratio = sample_rate;
747 struct clk *clk;
748 int ret;
749
750 /* Get root clock */
751 clk = micfil->mclk;
752
753 /* Disable clock first, for it was enabled by pm_runtime */
754 clk_disable_unprepare(clk);
755 fsl_asoc_reparent_pll_clocks(dev, clk, micfil->pll8k_clk,
756 micfil->pll11k_clk, ratio);
757 ret = clk_prepare_enable(clk);
758 if (ret)
759 return ret;
760
761 return 0;
762 }
763
fsl_micfil_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)764 static int fsl_micfil_hw_params(struct snd_pcm_substream *substream,
765 struct snd_pcm_hw_params *params,
766 struct snd_soc_dai *dai)
767 {
768 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
769 unsigned int channels = params_channels(params);
770 unsigned int rate = params_rate(params);
771 int clk_div = 8;
772 int osr = MICFIL_OSR_DEFAULT;
773 int ret;
774
775 /* 1. Disable the module */
776 ret = regmap_clear_bits(micfil->regmap, REG_MICFIL_CTRL1,
777 MICFIL_CTRL1_PDMIEN);
778 if (ret)
779 return ret;
780
781 /* enable channels */
782 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
783 0xFF, ((1 << channels) - 1));
784 if (ret)
785 return ret;
786
787 ret = fsl_micfil_reparent_rootclk(micfil, rate);
788 if (ret)
789 return ret;
790
791 ret = clk_set_rate(micfil->mclk, rate * clk_div * osr * 8);
792 if (ret)
793 return ret;
794
795 ret = micfil_set_quality(micfil);
796 if (ret)
797 return ret;
798
799 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
800 MICFIL_CTRL2_CLKDIV | MICFIL_CTRL2_CICOSR,
801 FIELD_PREP(MICFIL_CTRL2_CLKDIV, clk_div) |
802 FIELD_PREP(MICFIL_CTRL2_CICOSR, 16 - osr));
803
804 /* Configure CIC OSR in VADCICOSR */
805 regmap_update_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
806 MICFIL_VAD0_CTRL1_CICOSR,
807 FIELD_PREP(MICFIL_VAD0_CTRL1_CICOSR, 16 - osr));
808
809 /* Configure source channel in VADCHSEL */
810 regmap_update_bits(micfil->regmap, REG_MICFIL_VAD0_CTRL1,
811 MICFIL_VAD0_CTRL1_CHSEL,
812 FIELD_PREP(MICFIL_VAD0_CTRL1_CHSEL, (channels - 1)));
813
814 micfil->dma_params_rx.peripheral_config = &micfil->sdmacfg;
815 micfil->dma_params_rx.peripheral_size = sizeof(micfil->sdmacfg);
816 micfil->sdmacfg.n_fifos_src = channels;
817 micfil->sdmacfg.sw_done = true;
818 micfil->dma_params_rx.maxburst = channels * MICFIL_DMA_MAXBURST_RX;
819 if (micfil->soc->use_edma)
820 micfil->dma_params_rx.maxburst = channels;
821
822 return 0;
823 }
824
fsl_micfil_dai_probe(struct snd_soc_dai * cpu_dai)825 static int fsl_micfil_dai_probe(struct snd_soc_dai *cpu_dai)
826 {
827 struct fsl_micfil *micfil = dev_get_drvdata(cpu_dai->dev);
828 struct device *dev = cpu_dai->dev;
829 unsigned int val = 0;
830 int ret, i;
831
832 micfil->quality = QUALITY_VLOW0;
833 micfil->card = cpu_dai->component->card;
834
835 /* set default gain to 2 */
836 regmap_write(micfil->regmap, REG_MICFIL_OUT_CTRL, 0x22222222);
837
838 /* set DC Remover in bypass mode*/
839 for (i = 0; i < MICFIL_OUTPUT_CHANNELS; i++)
840 val |= MICFIL_DC_BYPASS << MICFIL_DC_CHX_SHIFT(i);
841 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_DC_CTRL,
842 MICFIL_DC_CTRL_CONFIG, val);
843 if (ret) {
844 dev_err(dev, "failed to set DC Remover mode bits\n");
845 return ret;
846 }
847 micfil->dc_remover = MICFIL_DC_BYPASS;
848
849 snd_soc_dai_init_dma_data(cpu_dai, NULL,
850 &micfil->dma_params_rx);
851
852 /* FIFO Watermark Control - FIFOWMK*/
853 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_FIFO_CTRL,
854 MICFIL_FIFO_CTRL_FIFOWMK,
855 FIELD_PREP(MICFIL_FIFO_CTRL_FIFOWMK, micfil->soc->fifo_depth - 1));
856 if (ret)
857 return ret;
858
859 return 0;
860 }
861
fsl_micfil_component_probe(struct snd_soc_component * component)862 static int fsl_micfil_component_probe(struct snd_soc_component *component)
863 {
864 struct fsl_micfil *micfil = snd_soc_component_get_drvdata(component);
865
866 if (micfil->soc->volume_sx)
867 snd_soc_add_component_controls(component, fsl_micfil_volume_sx_controls,
868 ARRAY_SIZE(fsl_micfil_volume_sx_controls));
869 else
870 snd_soc_add_component_controls(component, fsl_micfil_volume_controls,
871 ARRAY_SIZE(fsl_micfil_volume_controls));
872
873 return 0;
874 }
875
876 static const struct snd_soc_dai_ops fsl_micfil_dai_ops = {
877 .probe = fsl_micfil_dai_probe,
878 .startup = fsl_micfil_startup,
879 .trigger = fsl_micfil_trigger,
880 .hw_params = fsl_micfil_hw_params,
881 };
882
883 static struct snd_soc_dai_driver fsl_micfil_dai = {
884 .capture = {
885 .stream_name = "CPU-Capture",
886 .channels_min = 1,
887 .channels_max = 8,
888 .rates = SNDRV_PCM_RATE_8000_48000,
889 .formats = SNDRV_PCM_FMTBIT_S16_LE,
890 },
891 .ops = &fsl_micfil_dai_ops,
892 };
893
894 static const struct snd_soc_component_driver fsl_micfil_component = {
895 .name = "fsl-micfil-dai",
896 .probe = fsl_micfil_component_probe,
897 .controls = fsl_micfil_snd_controls,
898 .num_controls = ARRAY_SIZE(fsl_micfil_snd_controls),
899 .legacy_dai_naming = 1,
900 };
901
902 /* REGMAP */
903 static const struct reg_default fsl_micfil_reg_defaults[] = {
904 {REG_MICFIL_CTRL1, 0x00000000},
905 {REG_MICFIL_CTRL2, 0x00000000},
906 {REG_MICFIL_STAT, 0x00000000},
907 {REG_MICFIL_FIFO_CTRL, 0x00000007},
908 {REG_MICFIL_FIFO_STAT, 0x00000000},
909 {REG_MICFIL_DATACH0, 0x00000000},
910 {REG_MICFIL_DATACH1, 0x00000000},
911 {REG_MICFIL_DATACH2, 0x00000000},
912 {REG_MICFIL_DATACH3, 0x00000000},
913 {REG_MICFIL_DATACH4, 0x00000000},
914 {REG_MICFIL_DATACH5, 0x00000000},
915 {REG_MICFIL_DATACH6, 0x00000000},
916 {REG_MICFIL_DATACH7, 0x00000000},
917 {REG_MICFIL_DC_CTRL, 0x00000000},
918 {REG_MICFIL_OUT_CTRL, 0x00000000},
919 {REG_MICFIL_OUT_STAT, 0x00000000},
920 {REG_MICFIL_VAD0_CTRL1, 0x00000000},
921 {REG_MICFIL_VAD0_CTRL2, 0x000A0000},
922 {REG_MICFIL_VAD0_STAT, 0x00000000},
923 {REG_MICFIL_VAD0_SCONFIG, 0x00000000},
924 {REG_MICFIL_VAD0_NCONFIG, 0x80000000},
925 {REG_MICFIL_VAD0_NDATA, 0x00000000},
926 {REG_MICFIL_VAD0_ZCD, 0x00000004},
927 };
928
fsl_micfil_readable_reg(struct device * dev,unsigned int reg)929 static bool fsl_micfil_readable_reg(struct device *dev, unsigned int reg)
930 {
931 switch (reg) {
932 case REG_MICFIL_CTRL1:
933 case REG_MICFIL_CTRL2:
934 case REG_MICFIL_STAT:
935 case REG_MICFIL_FIFO_CTRL:
936 case REG_MICFIL_FIFO_STAT:
937 case REG_MICFIL_DATACH0:
938 case REG_MICFIL_DATACH1:
939 case REG_MICFIL_DATACH2:
940 case REG_MICFIL_DATACH3:
941 case REG_MICFIL_DATACH4:
942 case REG_MICFIL_DATACH5:
943 case REG_MICFIL_DATACH6:
944 case REG_MICFIL_DATACH7:
945 case REG_MICFIL_DC_CTRL:
946 case REG_MICFIL_OUT_CTRL:
947 case REG_MICFIL_OUT_STAT:
948 case REG_MICFIL_FSYNC_CTRL:
949 case REG_MICFIL_VERID:
950 case REG_MICFIL_PARAM:
951 case REG_MICFIL_VAD0_CTRL1:
952 case REG_MICFIL_VAD0_CTRL2:
953 case REG_MICFIL_VAD0_STAT:
954 case REG_MICFIL_VAD0_SCONFIG:
955 case REG_MICFIL_VAD0_NCONFIG:
956 case REG_MICFIL_VAD0_NDATA:
957 case REG_MICFIL_VAD0_ZCD:
958 return true;
959 default:
960 return false;
961 }
962 }
963
fsl_micfil_writeable_reg(struct device * dev,unsigned int reg)964 static bool fsl_micfil_writeable_reg(struct device *dev, unsigned int reg)
965 {
966 switch (reg) {
967 case REG_MICFIL_CTRL1:
968 case REG_MICFIL_CTRL2:
969 case REG_MICFIL_STAT: /* Write 1 to Clear */
970 case REG_MICFIL_FIFO_CTRL:
971 case REG_MICFIL_FIFO_STAT: /* Write 1 to Clear */
972 case REG_MICFIL_DC_CTRL:
973 case REG_MICFIL_OUT_CTRL:
974 case REG_MICFIL_OUT_STAT: /* Write 1 to Clear */
975 case REG_MICFIL_FSYNC_CTRL:
976 case REG_MICFIL_VAD0_CTRL1:
977 case REG_MICFIL_VAD0_CTRL2:
978 case REG_MICFIL_VAD0_STAT: /* Write 1 to Clear */
979 case REG_MICFIL_VAD0_SCONFIG:
980 case REG_MICFIL_VAD0_NCONFIG:
981 case REG_MICFIL_VAD0_ZCD:
982 return true;
983 default:
984 return false;
985 }
986 }
987
fsl_micfil_volatile_reg(struct device * dev,unsigned int reg)988 static bool fsl_micfil_volatile_reg(struct device *dev, unsigned int reg)
989 {
990 switch (reg) {
991 case REG_MICFIL_STAT:
992 case REG_MICFIL_DATACH0:
993 case REG_MICFIL_DATACH1:
994 case REG_MICFIL_DATACH2:
995 case REG_MICFIL_DATACH3:
996 case REG_MICFIL_DATACH4:
997 case REG_MICFIL_DATACH5:
998 case REG_MICFIL_DATACH6:
999 case REG_MICFIL_DATACH7:
1000 case REG_MICFIL_VERID:
1001 case REG_MICFIL_PARAM:
1002 case REG_MICFIL_VAD0_STAT:
1003 case REG_MICFIL_VAD0_NDATA:
1004 return true;
1005 default:
1006 return false;
1007 }
1008 }
1009
1010 static const struct regmap_config fsl_micfil_regmap_config = {
1011 .reg_bits = 32,
1012 .reg_stride = 4,
1013 .val_bits = 32,
1014
1015 .max_register = REG_MICFIL_VAD0_ZCD,
1016 .reg_defaults = fsl_micfil_reg_defaults,
1017 .num_reg_defaults = ARRAY_SIZE(fsl_micfil_reg_defaults),
1018 .readable_reg = fsl_micfil_readable_reg,
1019 .volatile_reg = fsl_micfil_volatile_reg,
1020 .writeable_reg = fsl_micfil_writeable_reg,
1021 .cache_type = REGCACHE_RBTREE,
1022 };
1023
1024 /* END OF REGMAP */
1025
micfil_isr(int irq,void * devid)1026 static irqreturn_t micfil_isr(int irq, void *devid)
1027 {
1028 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
1029 struct platform_device *pdev = micfil->pdev;
1030 u32 stat_reg;
1031 u32 fifo_stat_reg;
1032 u32 ctrl1_reg;
1033 bool dma_enabled;
1034 int i;
1035
1036 regmap_read(micfil->regmap, REG_MICFIL_STAT, &stat_reg);
1037 regmap_read(micfil->regmap, REG_MICFIL_CTRL1, &ctrl1_reg);
1038 regmap_read(micfil->regmap, REG_MICFIL_FIFO_STAT, &fifo_stat_reg);
1039
1040 dma_enabled = FIELD_GET(MICFIL_CTRL1_DISEL, ctrl1_reg) == MICFIL_CTRL1_DISEL_DMA;
1041
1042 /* Channel 0-7 Output Data Flags */
1043 for (i = 0; i < MICFIL_OUTPUT_CHANNELS; i++) {
1044 if (stat_reg & MICFIL_STAT_CHXF(i))
1045 dev_dbg(&pdev->dev,
1046 "Data available in Data Channel %d\n", i);
1047 /* if DMA is not enabled, field must be written with 1
1048 * to clear
1049 */
1050 if (!dma_enabled)
1051 regmap_write_bits(micfil->regmap,
1052 REG_MICFIL_STAT,
1053 MICFIL_STAT_CHXF(i),
1054 1);
1055 }
1056
1057 for (i = 0; i < MICFIL_FIFO_NUM; i++) {
1058 if (fifo_stat_reg & MICFIL_FIFO_STAT_FIFOX_OVER(i))
1059 dev_dbg(&pdev->dev,
1060 "FIFO Overflow Exception flag for channel %d\n",
1061 i);
1062
1063 if (fifo_stat_reg & MICFIL_FIFO_STAT_FIFOX_UNDER(i))
1064 dev_dbg(&pdev->dev,
1065 "FIFO Underflow Exception flag for channel %d\n",
1066 i);
1067 }
1068
1069 return IRQ_HANDLED;
1070 }
1071
micfil_err_isr(int irq,void * devid)1072 static irqreturn_t micfil_err_isr(int irq, void *devid)
1073 {
1074 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
1075 struct platform_device *pdev = micfil->pdev;
1076 u32 stat_reg;
1077
1078 regmap_read(micfil->regmap, REG_MICFIL_STAT, &stat_reg);
1079
1080 if (stat_reg & MICFIL_STAT_BSY_FIL)
1081 dev_dbg(&pdev->dev, "isr: Decimation Filter is running\n");
1082
1083 if (stat_reg & MICFIL_STAT_FIR_RDY)
1084 dev_dbg(&pdev->dev, "isr: FIR Filter Data ready\n");
1085
1086 if (stat_reg & MICFIL_STAT_LOWFREQF) {
1087 dev_dbg(&pdev->dev, "isr: ipg_clk_app is too low\n");
1088 regmap_write_bits(micfil->regmap, REG_MICFIL_STAT,
1089 MICFIL_STAT_LOWFREQF, 1);
1090 }
1091
1092 return IRQ_HANDLED;
1093 }
1094
voice_detected_fn(int irq,void * devid)1095 static irqreturn_t voice_detected_fn(int irq, void *devid)
1096 {
1097 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
1098 struct snd_kcontrol *kctl;
1099
1100 if (!micfil->card)
1101 return IRQ_HANDLED;
1102
1103 kctl = snd_soc_card_get_kcontrol(micfil->card, "VAD Detected");
1104 if (!kctl)
1105 return IRQ_HANDLED;
1106
1107 if (micfil->vad_detected)
1108 snd_ctl_notify(micfil->card->snd_card,
1109 SNDRV_CTL_EVENT_MASK_VALUE,
1110 &kctl->id);
1111
1112 return IRQ_HANDLED;
1113 }
1114
hwvad_isr(int irq,void * devid)1115 static irqreturn_t hwvad_isr(int irq, void *devid)
1116 {
1117 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
1118 struct device *dev = &micfil->pdev->dev;
1119 u32 vad0_reg;
1120 int ret;
1121
1122 regmap_read(micfil->regmap, REG_MICFIL_VAD0_STAT, &vad0_reg);
1123
1124 /*
1125 * The only difference between MICFIL_VAD0_STAT_EF and
1126 * MICFIL_VAD0_STAT_IF is that the former requires Write
1127 * 1 to Clear. Since both flags are set, it is enough
1128 * to only read one of them
1129 */
1130 if (vad0_reg & MICFIL_VAD0_STAT_IF) {
1131 /* Write 1 to clear */
1132 regmap_write_bits(micfil->regmap, REG_MICFIL_VAD0_STAT,
1133 MICFIL_VAD0_STAT_IF,
1134 MICFIL_VAD0_STAT_IF);
1135
1136 micfil->vad_detected = 1;
1137 }
1138
1139 ret = fsl_micfil_hwvad_disable(micfil);
1140 if (ret)
1141 dev_err(dev, "Failed to disable hwvad\n");
1142
1143 return IRQ_WAKE_THREAD;
1144 }
1145
hwvad_err_isr(int irq,void * devid)1146 static irqreturn_t hwvad_err_isr(int irq, void *devid)
1147 {
1148 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
1149 struct device *dev = &micfil->pdev->dev;
1150 u32 vad0_reg;
1151
1152 regmap_read(micfil->regmap, REG_MICFIL_VAD0_STAT, &vad0_reg);
1153
1154 if (vad0_reg & MICFIL_VAD0_STAT_INSATF)
1155 dev_dbg(dev, "voice activity input overflow/underflow detected\n");
1156
1157 return IRQ_HANDLED;
1158 }
1159
1160 static int fsl_micfil_runtime_suspend(struct device *dev);
1161 static int fsl_micfil_runtime_resume(struct device *dev);
1162
fsl_micfil_probe(struct platform_device * pdev)1163 static int fsl_micfil_probe(struct platform_device *pdev)
1164 {
1165 struct device_node *np = pdev->dev.of_node;
1166 struct fsl_micfil *micfil;
1167 struct resource *res;
1168 void __iomem *regs;
1169 int ret, i;
1170
1171 micfil = devm_kzalloc(&pdev->dev, sizeof(*micfil), GFP_KERNEL);
1172 if (!micfil)
1173 return -ENOMEM;
1174
1175 micfil->pdev = pdev;
1176 strscpy(micfil->name, np->name, sizeof(micfil->name));
1177
1178 micfil->soc = of_device_get_match_data(&pdev->dev);
1179
1180 /* ipg_clk is used to control the registers
1181 * ipg_clk_app is used to operate the filter
1182 */
1183 micfil->mclk = devm_clk_get(&pdev->dev, "ipg_clk_app");
1184 if (IS_ERR(micfil->mclk)) {
1185 dev_err(&pdev->dev, "failed to get core clock: %ld\n",
1186 PTR_ERR(micfil->mclk));
1187 return PTR_ERR(micfil->mclk);
1188 }
1189
1190 micfil->busclk = devm_clk_get(&pdev->dev, "ipg_clk");
1191 if (IS_ERR(micfil->busclk)) {
1192 dev_err(&pdev->dev, "failed to get ipg clock: %ld\n",
1193 PTR_ERR(micfil->busclk));
1194 return PTR_ERR(micfil->busclk);
1195 }
1196
1197 fsl_asoc_get_pll_clocks(&pdev->dev, &micfil->pll8k_clk,
1198 &micfil->pll11k_clk);
1199
1200 micfil->clk_src[MICFIL_AUDIO_PLL1] = micfil->pll8k_clk;
1201 micfil->clk_src[MICFIL_AUDIO_PLL2] = micfil->pll11k_clk;
1202 micfil->clk_src[MICFIL_CLK_EXT3] = devm_clk_get(&pdev->dev, "clkext3");
1203 if (IS_ERR(micfil->clk_src[MICFIL_CLK_EXT3]))
1204 micfil->clk_src[MICFIL_CLK_EXT3] = NULL;
1205
1206 /* init regmap */
1207 regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1208 if (IS_ERR(regs))
1209 return PTR_ERR(regs);
1210
1211 micfil->regmap = devm_regmap_init_mmio(&pdev->dev,
1212 regs,
1213 &fsl_micfil_regmap_config);
1214 if (IS_ERR(micfil->regmap)) {
1215 dev_err(&pdev->dev, "failed to init MICFIL regmap: %ld\n",
1216 PTR_ERR(micfil->regmap));
1217 return PTR_ERR(micfil->regmap);
1218 }
1219
1220 /* dataline mask for RX */
1221 ret = of_property_read_u32_index(np,
1222 "fsl,dataline",
1223 0,
1224 &micfil->dataline);
1225 if (ret)
1226 micfil->dataline = 1;
1227
1228 if (micfil->dataline & ~micfil->soc->dataline) {
1229 dev_err(&pdev->dev, "dataline setting error, Mask is 0x%X\n",
1230 micfil->soc->dataline);
1231 return -EINVAL;
1232 }
1233
1234 /* get IRQs */
1235 for (i = 0; i < MICFIL_IRQ_LINES; i++) {
1236 micfil->irq[i] = platform_get_irq(pdev, i);
1237 if (micfil->irq[i] < 0)
1238 return micfil->irq[i];
1239 }
1240
1241 /* Digital Microphone interface interrupt */
1242 ret = devm_request_irq(&pdev->dev, micfil->irq[0],
1243 micfil_isr, IRQF_SHARED,
1244 micfil->name, micfil);
1245 if (ret) {
1246 dev_err(&pdev->dev, "failed to claim mic interface irq %u\n",
1247 micfil->irq[0]);
1248 return ret;
1249 }
1250
1251 /* Digital Microphone interface error interrupt */
1252 ret = devm_request_irq(&pdev->dev, micfil->irq[1],
1253 micfil_err_isr, IRQF_SHARED,
1254 micfil->name, micfil);
1255 if (ret) {
1256 dev_err(&pdev->dev, "failed to claim mic interface error irq %u\n",
1257 micfil->irq[1]);
1258 return ret;
1259 }
1260
1261 /* Digital Microphone interface voice activity detector event */
1262 ret = devm_request_threaded_irq(&pdev->dev, micfil->irq[2],
1263 hwvad_isr, voice_detected_fn,
1264 IRQF_SHARED, micfil->name, micfil);
1265 if (ret) {
1266 dev_err(&pdev->dev, "failed to claim hwvad event irq %u\n",
1267 micfil->irq[0]);
1268 return ret;
1269 }
1270
1271 /* Digital Microphone interface voice activity detector error */
1272 ret = devm_request_irq(&pdev->dev, micfil->irq[3],
1273 hwvad_err_isr, IRQF_SHARED,
1274 micfil->name, micfil);
1275 if (ret) {
1276 dev_err(&pdev->dev, "failed to claim hwvad error irq %u\n",
1277 micfil->irq[1]);
1278 return ret;
1279 }
1280
1281 micfil->dma_params_rx.chan_name = "rx";
1282 micfil->dma_params_rx.addr = res->start + REG_MICFIL_DATACH0;
1283 micfil->dma_params_rx.maxburst = MICFIL_DMA_MAXBURST_RX;
1284
1285 platform_set_drvdata(pdev, micfil);
1286
1287 pm_runtime_enable(&pdev->dev);
1288 if (!pm_runtime_enabled(&pdev->dev)) {
1289 ret = fsl_micfil_runtime_resume(&pdev->dev);
1290 if (ret)
1291 goto err_pm_disable;
1292 }
1293
1294 ret = pm_runtime_resume_and_get(&pdev->dev);
1295 if (ret < 0)
1296 goto err_pm_get_sync;
1297
1298 /* Get micfil version */
1299 ret = fsl_micfil_use_verid(&pdev->dev);
1300 if (ret < 0)
1301 dev_warn(&pdev->dev, "Error reading MICFIL version: %d\n", ret);
1302
1303 ret = pm_runtime_put_sync(&pdev->dev);
1304 if (ret < 0 && ret != -ENOSYS)
1305 goto err_pm_get_sync;
1306
1307 regcache_cache_only(micfil->regmap, true);
1308
1309 /*
1310 * Register platform component before registering cpu dai for there
1311 * is not defer probe for platform component in snd_soc_add_pcm_runtime().
1312 */
1313 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
1314 if (ret) {
1315 dev_err(&pdev->dev, "failed to pcm register\n");
1316 goto err_pm_disable;
1317 }
1318
1319 fsl_micfil_dai.capture.formats = micfil->soc->formats;
1320
1321 ret = devm_snd_soc_register_component(&pdev->dev, &fsl_micfil_component,
1322 &fsl_micfil_dai, 1);
1323 if (ret) {
1324 dev_err(&pdev->dev, "failed to register component %s\n",
1325 fsl_micfil_component.name);
1326 goto err_pm_disable;
1327 }
1328
1329 return ret;
1330
1331 err_pm_get_sync:
1332 if (!pm_runtime_status_suspended(&pdev->dev))
1333 fsl_micfil_runtime_suspend(&pdev->dev);
1334 err_pm_disable:
1335 pm_runtime_disable(&pdev->dev);
1336
1337 return ret;
1338 }
1339
fsl_micfil_remove(struct platform_device * pdev)1340 static void fsl_micfil_remove(struct platform_device *pdev)
1341 {
1342 pm_runtime_disable(&pdev->dev);
1343 }
1344
fsl_micfil_runtime_suspend(struct device * dev)1345 static int fsl_micfil_runtime_suspend(struct device *dev)
1346 {
1347 struct fsl_micfil *micfil = dev_get_drvdata(dev);
1348
1349 regcache_cache_only(micfil->regmap, true);
1350
1351 clk_disable_unprepare(micfil->mclk);
1352 clk_disable_unprepare(micfil->busclk);
1353
1354 return 0;
1355 }
1356
fsl_micfil_runtime_resume(struct device * dev)1357 static int fsl_micfil_runtime_resume(struct device *dev)
1358 {
1359 struct fsl_micfil *micfil = dev_get_drvdata(dev);
1360 int ret;
1361
1362 ret = clk_prepare_enable(micfil->busclk);
1363 if (ret < 0)
1364 return ret;
1365
1366 ret = clk_prepare_enable(micfil->mclk);
1367 if (ret < 0) {
1368 clk_disable_unprepare(micfil->busclk);
1369 return ret;
1370 }
1371
1372 regcache_cache_only(micfil->regmap, false);
1373 regcache_mark_dirty(micfil->regmap);
1374 regcache_sync(micfil->regmap);
1375
1376 return 0;
1377 }
1378
1379 static const struct dev_pm_ops fsl_micfil_pm_ops = {
1380 SET_RUNTIME_PM_OPS(fsl_micfil_runtime_suspend,
1381 fsl_micfil_runtime_resume,
1382 NULL)
1383 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1384 pm_runtime_force_resume)
1385 };
1386
1387 static struct platform_driver fsl_micfil_driver = {
1388 .probe = fsl_micfil_probe,
1389 .remove_new = fsl_micfil_remove,
1390 .driver = {
1391 .name = "fsl-micfil-dai",
1392 .pm = &fsl_micfil_pm_ops,
1393 .of_match_table = fsl_micfil_dt_ids,
1394 },
1395 };
1396 module_platform_driver(fsl_micfil_driver);
1397
1398 MODULE_AUTHOR("Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>");
1399 MODULE_DESCRIPTION("NXP PDM Microphone Interface (MICFIL) driver");
1400 MODULE_LICENSE("Dual BSD/GPL");
1401