]> Git Repo - J-linux.git/blob - sound/soc/tegra/tegra186_dspk.c
Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / sound / soc / tegra / tegra186_dspk.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 // SPDX-FileCopyrightText: Copyright (c) 2020-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
3 //
4 // tegra186_dspk.c - Tegra186 DSPK driver
5
6 #include <linux/clk.h>
7 #include <linux/device.h>
8 #include <linux/mod_devicetable.h>
9 #include <linux/module.h>
10 #include <linux/of.h>
11 #include <linux/platform_device.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/regmap.h>
14 #include <sound/core.h>
15 #include <sound/pcm_params.h>
16 #include <sound/soc.h>
17 #include "tegra186_dspk.h"
18 #include "tegra_cif.h"
19
20 static const struct reg_default tegra186_dspk_reg_defaults[] = {
21         { TEGRA186_DSPK_RX_INT_MASK, 0x00000007 },
22         { TEGRA186_DSPK_RX_CIF_CTRL, 0x00007700 },
23         { TEGRA186_DSPK_CG,          0x00000001 },
24         { TEGRA186_DSPK_CORE_CTRL,   0x00000310 },
25         { TEGRA186_DSPK_CODEC_CTRL,  0x03000000 },
26 };
27
28 static int tegra186_dspk_get_fifo_th(struct snd_kcontrol *kcontrol,
29                                      struct snd_ctl_elem_value *ucontrol)
30 {
31         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
32         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
33
34         ucontrol->value.integer.value[0] = dspk->rx_fifo_th;
35
36         return 0;
37 }
38
39 static int tegra186_dspk_put_fifo_th(struct snd_kcontrol *kcontrol,
40                                      struct snd_ctl_elem_value *ucontrol)
41 {
42         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
43         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
44         int value = ucontrol->value.integer.value[0];
45
46         if (value == dspk->rx_fifo_th)
47                 return 0;
48
49         dspk->rx_fifo_th = value;
50
51         return 1;
52 }
53
54 static int tegra186_dspk_get_osr_val(struct snd_kcontrol *kcontrol,
55                                      struct snd_ctl_elem_value *ucontrol)
56 {
57         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
58         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
59
60         ucontrol->value.enumerated.item[0] = dspk->osr_val;
61
62         return 0;
63 }
64
65 static int tegra186_dspk_put_osr_val(struct snd_kcontrol *kcontrol,
66                                      struct snd_ctl_elem_value *ucontrol)
67 {
68         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
69         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
70         unsigned int value = ucontrol->value.enumerated.item[0];
71
72         if (value == dspk->osr_val)
73                 return 0;
74
75         dspk->osr_val = value;
76
77         return 1;
78 }
79
80 static int tegra186_dspk_get_pol_sel(struct snd_kcontrol *kcontrol,
81                                      struct snd_ctl_elem_value *ucontrol)
82 {
83         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
84         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
85
86         ucontrol->value.enumerated.item[0] = dspk->lrsel;
87
88         return 0;
89 }
90
91 static int tegra186_dspk_put_pol_sel(struct snd_kcontrol *kcontrol,
92                                      struct snd_ctl_elem_value *ucontrol)
93 {
94         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
95         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
96         unsigned int value = ucontrol->value.enumerated.item[0];
97
98         if (value == dspk->lrsel)
99                 return 0;
100
101         dspk->lrsel = value;
102
103         return 1;
104 }
105
106 static int tegra186_dspk_get_ch_sel(struct snd_kcontrol *kcontrol,
107                                     struct snd_ctl_elem_value *ucontrol)
108 {
109         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
110         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
111
112         ucontrol->value.enumerated.item[0] = dspk->ch_sel;
113
114         return 0;
115 }
116
117 static int tegra186_dspk_put_ch_sel(struct snd_kcontrol *kcontrol,
118                                     struct snd_ctl_elem_value *ucontrol)
119 {
120         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
121         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
122         unsigned int value = ucontrol->value.enumerated.item[0];
123
124         if (value == dspk->ch_sel)
125                 return 0;
126
127         dspk->ch_sel = value;
128
129         return 1;
130 }
131
132 static int tegra186_dspk_get_mono_to_stereo(struct snd_kcontrol *kcontrol,
133                                             struct snd_ctl_elem_value *ucontrol)
134 {
135         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
136         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
137
138         ucontrol->value.enumerated.item[0] = dspk->mono_to_stereo;
139
140         return 0;
141 }
142
143 static int tegra186_dspk_put_mono_to_stereo(struct snd_kcontrol *kcontrol,
144                                             struct snd_ctl_elem_value *ucontrol)
145 {
146         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
147         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
148         unsigned int value = ucontrol->value.enumerated.item[0];
149
150         if (value == dspk->mono_to_stereo)
151                 return 0;
152
153         dspk->mono_to_stereo = value;
154
155         return 1;
156 }
157
158 static int tegra186_dspk_get_stereo_to_mono(struct snd_kcontrol *kcontrol,
159                                             struct snd_ctl_elem_value *ucontrol)
160 {
161         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
162         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
163
164         ucontrol->value.enumerated.item[0] = dspk->stereo_to_mono;
165
166         return 0;
167 }
168
169 static int tegra186_dspk_put_stereo_to_mono(struct snd_kcontrol *kcontrol,
170                                             struct snd_ctl_elem_value *ucontrol)
171 {
172         struct snd_soc_component *codec = snd_soc_kcontrol_component(kcontrol);
173         struct tegra186_dspk *dspk = snd_soc_component_get_drvdata(codec);
174         unsigned int value = ucontrol->value.enumerated.item[0];
175
176         if (value == dspk->stereo_to_mono)
177                 return 0;
178
179         dspk->stereo_to_mono = value;
180
181         return 1;
182 }
183
184 static int __maybe_unused tegra186_dspk_runtime_suspend(struct device *dev)
185 {
186         struct tegra186_dspk *dspk = dev_get_drvdata(dev);
187
188         regcache_cache_only(dspk->regmap, true);
189         regcache_mark_dirty(dspk->regmap);
190
191         clk_disable_unprepare(dspk->clk_dspk);
192
193         return 0;
194 }
195
196 static int __maybe_unused tegra186_dspk_runtime_resume(struct device *dev)
197 {
198         struct tegra186_dspk *dspk = dev_get_drvdata(dev);
199         int err;
200
201         err = clk_prepare_enable(dspk->clk_dspk);
202         if (err) {
203                 dev_err(dev, "failed to enable DSPK clock, err: %d\n", err);
204                 return err;
205         }
206
207         regcache_cache_only(dspk->regmap, false);
208         regcache_sync(dspk->regmap);
209
210         return 0;
211 }
212
213 static int tegra186_dspk_hw_params(struct snd_pcm_substream *substream,
214                                    struct snd_pcm_hw_params *params,
215                                    struct snd_soc_dai *dai)
216 {
217         struct tegra186_dspk *dspk = snd_soc_dai_get_drvdata(dai);
218         unsigned int channels, srate, dspk_clk;
219         struct device *dev = dai->dev;
220         struct tegra_cif_conf cif_conf;
221         unsigned int max_th;
222         int err;
223
224         memset(&cif_conf, 0, sizeof(struct tegra_cif_conf));
225
226         channels = params_channels(params);
227         cif_conf.audio_ch = channels;
228
229         /* Client channel */
230         switch (dspk->ch_sel) {
231         case DSPK_CH_SELECT_LEFT:
232         case DSPK_CH_SELECT_RIGHT:
233                 cif_conf.client_ch = 1;
234                 break;
235         case DSPK_CH_SELECT_STEREO:
236                 cif_conf.client_ch = 2;
237                 break;
238         default:
239                 dev_err(dev, "Invalid DSPK client channels\n");
240                 return -EINVAL;
241         }
242
243         switch (params_format(params)) {
244         case SNDRV_PCM_FORMAT_S16_LE:
245                 cif_conf.audio_bits = TEGRA_ACIF_BITS_16;
246                 cif_conf.client_bits = TEGRA_ACIF_BITS_16;
247                 break;
248         case SNDRV_PCM_FORMAT_S24_LE:
249         case SNDRV_PCM_FORMAT_S32_LE:
250                 cif_conf.audio_bits = TEGRA_ACIF_BITS_32;
251                 cif_conf.client_bits = TEGRA_ACIF_BITS_24;
252                 break;
253         default:
254                 dev_err(dev, "unsupported format!\n");
255                 return -EOPNOTSUPP;
256         }
257
258         srate = params_rate(params);
259
260         /* RX FIFO threshold in terms of frames */
261         max_th = (TEGRA186_DSPK_RX_FIFO_DEPTH / cif_conf.audio_ch) - 1;
262
263         if (dspk->rx_fifo_th > max_th)
264                 dspk->rx_fifo_th = max_th;
265
266         cif_conf.threshold = dspk->rx_fifo_th;
267         cif_conf.mono_conv = dspk->mono_to_stereo;
268         cif_conf.stereo_conv = dspk->stereo_to_mono;
269
270         tegra_set_cif(dspk->regmap, TEGRA186_DSPK_RX_CIF_CTRL,
271                       &cif_conf);
272
273         /*
274          * DSPK clock and PDM codec clock should be synchronous with 4:1 ratio,
275          * this is because it takes 4 clock cycles to send out one sample to
276          * codec by sigma delta modulator. Finally the clock rate is a multiple
277          * of 'Over Sampling Ratio', 'Sample Rate' and 'Interface Clock Ratio'.
278          */
279         dspk_clk = (DSPK_OSR_FACTOR << dspk->osr_val) * srate * DSPK_CLK_RATIO;
280
281         err = clk_set_rate(dspk->clk_dspk, dspk_clk);
282         if (err) {
283                 dev_err(dev, "can't set DSPK clock rate %u, err: %d\n",
284                         dspk_clk, err);
285
286                 return err;
287         }
288
289         regmap_update_bits(dspk->regmap,
290                            /* Reg */
291                            TEGRA186_DSPK_CORE_CTRL,
292                            /* Mask */
293                            TEGRA186_DSPK_OSR_MASK |
294                            TEGRA186_DSPK_CHANNEL_SELECT_MASK |
295                            TEGRA186_DSPK_CTRL_LRSEL_POLARITY_MASK,
296                            /* Value */
297                            (dspk->osr_val << DSPK_OSR_SHIFT) |
298                            ((dspk->ch_sel + 1) << CH_SEL_SHIFT) |
299                            (dspk->lrsel << LRSEL_POL_SHIFT));
300
301         return 0;
302 }
303
304 static const struct snd_soc_dai_ops tegra186_dspk_dai_ops = {
305         .hw_params      = tegra186_dspk_hw_params,
306 };
307
308 static struct snd_soc_dai_driver tegra186_dspk_dais[] = {
309         {
310             .name = "DSPK-CIF",
311             .playback = {
312                 .stream_name = "CIF-Playback",
313                 .channels_min = 1,
314                 .channels_max = 2,
315                 .rates = SNDRV_PCM_RATE_8000_48000,
316                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
317                            SNDRV_PCM_FMTBIT_S24_LE |
318                            SNDRV_PCM_FMTBIT_S32_LE,
319             },
320         },
321         {
322             .name = "DSPK-DAP",
323             .playback = {
324                 .stream_name = "DAP-Playback",
325                 .channels_min = 1,
326                 .channels_max = 2,
327                 .rates = SNDRV_PCM_RATE_8000_48000,
328                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
329                            SNDRV_PCM_FMTBIT_S24_LE |
330                            SNDRV_PCM_FMTBIT_S32_LE,
331             },
332             .ops = &tegra186_dspk_dai_ops,
333             .symmetric_rate = 1,
334         },
335 };
336
337 static const struct snd_soc_dapm_widget tegra186_dspk_widgets[] = {
338         SND_SOC_DAPM_AIF_IN("RX", NULL, 0, TEGRA186_DSPK_ENABLE, 0, 0),
339         SND_SOC_DAPM_SPK("SPK", NULL),
340 };
341
342 static const struct snd_soc_dapm_route tegra186_dspk_routes[] = {
343         { "XBAR-Playback",      NULL,   "XBAR-TX" },
344         { "CIF-Playback",       NULL,   "XBAR-Playback" },
345         { "RX",                 NULL,   "CIF-Playback" },
346         { "DAP-Playback",       NULL,   "RX" },
347         { "SPK",                NULL,   "DAP-Playback" },
348 };
349
350 static const char * const tegra186_dspk_ch_sel_text[] = {
351         "Left", "Right", "Stereo",
352 };
353
354 static const struct soc_enum tegra186_dspk_ch_sel_enum =
355         SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, ARRAY_SIZE(tegra186_dspk_ch_sel_text),
356                         tegra186_dspk_ch_sel_text);
357
358 static const char * const tegra186_dspk_osr_text[] = {
359         "OSR_32", "OSR_64", "OSR_128", "OSR_256",
360 };
361
362 static const struct soc_enum tegra186_dspk_osr_enum =
363         SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, ARRAY_SIZE(tegra186_dspk_osr_text),
364                         tegra186_dspk_osr_text);
365
366 static const char * const tegra186_dspk_lrsel_text[] = {
367         "Left", "Right",
368 };
369
370 static const char * const tegra186_dspk_mono_conv_text[] = {
371         "Zero", "Copy",
372 };
373
374 static const struct soc_enum tegra186_dspk_mono_conv_enum =
375         SOC_ENUM_SINGLE(SND_SOC_NOPM, 0,
376                         ARRAY_SIZE(tegra186_dspk_mono_conv_text),
377                         tegra186_dspk_mono_conv_text);
378
379 static const char * const tegra186_dspk_stereo_conv_text[] = {
380         "CH0", "CH1", "AVG",
381 };
382
383 static const struct soc_enum tegra186_dspk_stereo_conv_enum =
384         SOC_ENUM_SINGLE(SND_SOC_NOPM, 0,
385                         ARRAY_SIZE(tegra186_dspk_stereo_conv_text),
386                         tegra186_dspk_stereo_conv_text);
387
388 static const struct soc_enum tegra186_dspk_lrsel_enum =
389         SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, ARRAY_SIZE(tegra186_dspk_lrsel_text),
390                         tegra186_dspk_lrsel_text);
391
392 static const struct snd_kcontrol_new tegrat186_dspk_controls[] = {
393         SOC_SINGLE_EXT("FIFO Threshold", SND_SOC_NOPM, 0,
394                        TEGRA186_DSPK_RX_FIFO_DEPTH - 1, 0,
395                        tegra186_dspk_get_fifo_th, tegra186_dspk_put_fifo_th),
396         SOC_ENUM_EXT("OSR Value", tegra186_dspk_osr_enum,
397                      tegra186_dspk_get_osr_val, tegra186_dspk_put_osr_val),
398         SOC_ENUM_EXT("LR Polarity Select", tegra186_dspk_lrsel_enum,
399                      tegra186_dspk_get_pol_sel, tegra186_dspk_put_pol_sel),
400         SOC_ENUM_EXT("Channel Select", tegra186_dspk_ch_sel_enum,
401                      tegra186_dspk_get_ch_sel, tegra186_dspk_put_ch_sel),
402         SOC_ENUM_EXT("Mono To Stereo", tegra186_dspk_mono_conv_enum,
403                      tegra186_dspk_get_mono_to_stereo,
404                      tegra186_dspk_put_mono_to_stereo),
405         SOC_ENUM_EXT("Stereo To Mono", tegra186_dspk_stereo_conv_enum,
406                      tegra186_dspk_get_stereo_to_mono,
407                      tegra186_dspk_put_stereo_to_mono),
408 };
409
410 static const struct snd_soc_component_driver tegra186_dspk_cmpnt = {
411         .dapm_widgets = tegra186_dspk_widgets,
412         .num_dapm_widgets = ARRAY_SIZE(tegra186_dspk_widgets),
413         .dapm_routes = tegra186_dspk_routes,
414         .num_dapm_routes = ARRAY_SIZE(tegra186_dspk_routes),
415         .controls = tegrat186_dspk_controls,
416         .num_controls = ARRAY_SIZE(tegrat186_dspk_controls),
417 };
418
419 static bool tegra186_dspk_wr_reg(struct device *dev, unsigned int reg)
420 {
421         switch (reg) {
422         case TEGRA186_DSPK_RX_INT_MASK ... TEGRA186_DSPK_RX_CIF_CTRL:
423         case TEGRA186_DSPK_ENABLE ... TEGRA186_DSPK_CG:
424         case TEGRA186_DSPK_CORE_CTRL ... TEGRA186_DSPK_CODEC_CTRL:
425                 return true;
426         default:
427                 return false;
428         }
429 }
430
431 static bool tegra186_dspk_rd_reg(struct device *dev, unsigned int reg)
432 {
433         if (tegra186_dspk_wr_reg(dev, reg))
434                 return true;
435
436         switch (reg) {
437         case TEGRA186_DSPK_RX_STATUS:
438         case TEGRA186_DSPK_RX_INT_STATUS:
439         case TEGRA186_DSPK_STATUS:
440         case TEGRA186_DSPK_INT_STATUS:
441                 return true;
442         default:
443                 return false;
444         }
445 }
446
447 static bool tegra186_dspk_volatile_reg(struct device *dev, unsigned int reg)
448 {
449         switch (reg) {
450         case TEGRA186_DSPK_RX_STATUS:
451         case TEGRA186_DSPK_RX_INT_STATUS:
452         case TEGRA186_DSPK_STATUS:
453         case TEGRA186_DSPK_INT_STATUS:
454                 return true;
455         default:
456                 return false;
457         }
458 }
459
460 static const struct regmap_config tegra186_dspk_regmap = {
461         .reg_bits               = 32,
462         .reg_stride             = 4,
463         .val_bits               = 32,
464         .max_register           = TEGRA186_DSPK_CODEC_CTRL,
465         .writeable_reg          = tegra186_dspk_wr_reg,
466         .readable_reg           = tegra186_dspk_rd_reg,
467         .volatile_reg           = tegra186_dspk_volatile_reg,
468         .reg_defaults           = tegra186_dspk_reg_defaults,
469         .num_reg_defaults       = ARRAY_SIZE(tegra186_dspk_reg_defaults),
470         .cache_type             = REGCACHE_FLAT,
471 };
472
473 static const struct of_device_id tegra186_dspk_of_match[] = {
474         { .compatible = "nvidia,tegra186-dspk" },
475         {},
476 };
477 MODULE_DEVICE_TABLE(of, tegra186_dspk_of_match);
478
479 static int tegra186_dspk_platform_probe(struct platform_device *pdev)
480 {
481         struct device *dev = &pdev->dev;
482         struct tegra186_dspk *dspk;
483         void __iomem *regs;
484         int err;
485
486         dspk = devm_kzalloc(dev, sizeof(*dspk), GFP_KERNEL);
487         if (!dspk)
488                 return -ENOMEM;
489
490         dspk->osr_val = DSPK_OSR_64;
491         dspk->lrsel = DSPK_LRSEL_LEFT;
492         dspk->ch_sel = DSPK_CH_SELECT_STEREO;
493         dspk->mono_to_stereo = 0; /* "Zero" */
494
495         dev_set_drvdata(dev, dspk);
496
497         dspk->clk_dspk = devm_clk_get(dev, "dspk");
498         if (IS_ERR(dspk->clk_dspk)) {
499                 dev_err(dev, "can't retrieve DSPK clock\n");
500                 return PTR_ERR(dspk->clk_dspk);
501         }
502
503         regs = devm_platform_ioremap_resource(pdev, 0);
504         if (IS_ERR(regs))
505                 return PTR_ERR(regs);
506
507         dspk->regmap = devm_regmap_init_mmio(dev, regs, &tegra186_dspk_regmap);
508         if (IS_ERR(dspk->regmap)) {
509                 dev_err(dev, "regmap init failed\n");
510                 return PTR_ERR(dspk->regmap);
511         }
512
513         regcache_cache_only(dspk->regmap, true);
514
515         err = devm_snd_soc_register_component(dev, &tegra186_dspk_cmpnt,
516                                               tegra186_dspk_dais,
517                                               ARRAY_SIZE(tegra186_dspk_dais));
518         if (err) {
519                 dev_err(dev, "can't register DSPK component, err: %d\n",
520                         err);
521                 return err;
522         }
523
524         pm_runtime_enable(dev);
525
526         return 0;
527 }
528
529 static void tegra186_dspk_platform_remove(struct platform_device *pdev)
530 {
531         pm_runtime_disable(&pdev->dev);
532 }
533
534 static const struct dev_pm_ops tegra186_dspk_pm_ops = {
535         SET_RUNTIME_PM_OPS(tegra186_dspk_runtime_suspend,
536                            tegra186_dspk_runtime_resume, NULL)
537         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
538                                 pm_runtime_force_resume)
539 };
540
541 static struct platform_driver tegra186_dspk_driver = {
542         .driver = {
543                 .name = "tegra186-dspk",
544                 .of_match_table = tegra186_dspk_of_match,
545                 .pm = &tegra186_dspk_pm_ops,
546         },
547         .probe = tegra186_dspk_platform_probe,
548         .remove = tegra186_dspk_platform_remove,
549 };
550 module_platform_driver(tegra186_dspk_driver);
551
552 MODULE_AUTHOR("Mohan Kumar <[email protected]>");
553 MODULE_AUTHOR("Sameer Pujar <[email protected]>");
554 MODULE_DESCRIPTION("Tegra186 ASoC DSPK driver");
555 MODULE_LICENSE("GPL v2");
This page took 0.056647 seconds and 4 git commands to generate.