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1 From 13efe81b4ab9321290d6973e90d00b7caf37b47f Mon Sep 17 00:00:00 2001
2 From: escalator2015 <jmtasende@gmail.com>
3 Date: Tue, 24 May 2016 16:20:09 +0100
4 Subject: [PATCH] New driver for RRA DigiDAC1 soundcard using WM8741 +
5 WM8804
6
7 ---
8 sound/soc/bcm/digidac1-soundcard.c | 416 +++++++++++++++++++++++++++++
9 1 file changed, 416 insertions(+)
10 create mode 100644 sound/soc/bcm/digidac1-soundcard.c
11
12 --- /dev/null
13 +++ b/sound/soc/bcm/digidac1-soundcard.c
14 @@ -0,0 +1,416 @@
15 +/*
16 + * ASoC Driver for RRA DigiDAC1
17 + * Copyright 2016
18 + * Author: José M. Tasende <vintage@redrocksaudio.es>
19 + * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
20 + * and the Wolfson card driver by Nikesh Oswal, <Nikesh.Oswal@wolfsonmicro.com>
21 + * This program is free software; you can redistribute it and/or
22 + * modify it under the terms of the GNU General Public License
23 + * version 2 as published by the Free Software Foundation.
24 + *
25 + * This program is distributed in the hope that it will be useful, but
26 + * WITHOUT ANY WARRANTY; without even the implied warranty of
27 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
28 + * General Public License for more details.
29 + */
30 +
31 +#include <linux/module.h>
32 +#include <linux/platform_device.h>
33 +#include <linux/i2c.h>
34 +#include <sound/core.h>
35 +#include <sound/pcm.h>
36 +#include <sound/pcm_params.h>
37 +#include <sound/soc.h>
38 +#include <sound/jack.h>
39 +#include <sound/soc-dapm.h>
40 +#include <sound/tlv.h>
41 +#include <linux/regulator/consumer.h>
42 +
43 +#include "../codecs/wm8804.h"
44 +#include "../codecs/wm8741.h"
45 +
46 +#define WM8741_NUM_SUPPLIES 2
47 +
48 +/* codec private data */
49 +struct wm8741_priv {
50 + struct wm8741_platform_data pdata;
51 + struct regmap *regmap;
52 + struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
53 + unsigned int sysclk;
54 + const struct snd_pcm_hw_constraint_list *sysclk_constraints;
55 +};
56 +
57 +static int samplerate = 44100;
58 +
59 +/* New Alsa Controls not exposed by original wm8741 codec driver */
60 +/* in actual driver the att. adjustment is wrong because */
61 +/* this DAC has a coarse attenuation register with 4dB steps */
62 +/* and a fine level register with 0.125dB steps */
63 +/* each register has 32 steps so combining both we have 1024 steps */
64 +/* of 0.125 dB. */
65 +/* The original level controls from driver are removed at startup */
66 +/* and replaced by the corrected ones. */
67 +/* The same wm8741 driver can be used for wm8741 and wm8742 devices */
68 +
69 +static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, 0, 13, 0);
70 +static const DECLARE_TLV_DB_SCALE(dac_tlv_coarse, -12700, 400, 1);
71 +static const char *w8741_dither[4] = {"Off", "RPDF", "TPDF", "HPDF"};
72 +static const char *w8741_filter[5] = {
73 + "Type 1", "Type 2", "Type 3", "Type 4", "Type 5"};
74 +static const char *w8741_switch[2] = {"Off", "On"};
75 +static const struct soc_enum w8741_enum[] = {
76 +SOC_ENUM_SINGLE(WM8741_MODE_CONTROL_2, 0, 4, w8741_dither),/* dithering type */
77 +SOC_ENUM_SINGLE(WM8741_FILTER_CONTROL, 0, 5, w8741_filter),/* filter type */
78 +SOC_ENUM_SINGLE(WM8741_FORMAT_CONTROL, 6, 2, w8741_switch),/* phase invert */
79 +SOC_ENUM_SINGLE(WM8741_VOLUME_CONTROL, 0, 2, w8741_switch),/* volume ramp */
80 +SOC_ENUM_SINGLE(WM8741_VOLUME_CONTROL, 3, 2, w8741_switch),/* soft mute */
81 +};
82 +
83 +static const struct snd_kcontrol_new w8741_snd_controls_stereo[] = {
84 +SOC_DOUBLE_R_TLV("DAC Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
85 + WM8741_DACRLSB_ATTENUATION, 0, 31, 1, dac_tlv_fine),
86 +SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8741_DACLMSB_ATTENUATION,
87 + WM8741_DACRMSB_ATTENUATION, 0, 31, 1, dac_tlv_coarse),
88 +SOC_ENUM("DAC Dither", w8741_enum[0]),
89 +SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
90 +SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
91 +SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
92 +SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
93 +};
94 +
95 +static const struct snd_kcontrol_new w8741_snd_controls_mono_left[] = {
96 +SOC_SINGLE_TLV("DAC Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
97 + 0, 31, 0, dac_tlv_fine),
98 +SOC_SINGLE_TLV("Digital Playback Volume", WM8741_DACLMSB_ATTENUATION,
99 + 0, 31, 1, dac_tlv_coarse),
100 +SOC_ENUM("DAC Dither", w8741_enum[0]),
101 +SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
102 +SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
103 +SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
104 +SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
105 +};
106 +
107 +static const struct snd_kcontrol_new w8741_snd_controls_mono_right[] = {
108 +SOC_SINGLE_TLV("DAC Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
109 + 0, 31, 0, dac_tlv_fine),
110 +SOC_SINGLE_TLV("Digital Playback Volume", WM8741_DACRMSB_ATTENUATION,
111 + 0, 31, 1, dac_tlv_coarse),
112 +SOC_ENUM("DAC Dither", w8741_enum[0]),
113 +SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
114 +SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
115 +SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
116 +SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
117 +};
118 +
119 +static int w8741_add_controls(struct snd_soc_component *component)
120 +{
121 + struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
122 +
123 + switch (wm8741->pdata.diff_mode) {
124 + case WM8741_DIFF_MODE_STEREO:
125 + case WM8741_DIFF_MODE_STEREO_REVERSED:
126 + snd_soc_add_component_controls(component,
127 + w8741_snd_controls_stereo,
128 + ARRAY_SIZE(w8741_snd_controls_stereo));
129 + break;
130 + case WM8741_DIFF_MODE_MONO_LEFT:
131 + snd_soc_add_component_controls(component,
132 + w8741_snd_controls_mono_left,
133 + ARRAY_SIZE(w8741_snd_controls_mono_left));
134 + break;
135 + case WM8741_DIFF_MODE_MONO_RIGHT:
136 + snd_soc_add_component_controls(component,
137 + w8741_snd_controls_mono_right,
138 + ARRAY_SIZE(w8741_snd_controls_mono_right));
139 + break;
140 + default:
141 + return -EINVAL;
142 + }
143 +
144 + return 0;
145 +}
146 +
147 +static int digidac1_soundcard_init(struct snd_soc_pcm_runtime *rtd)
148 +{
149 + struct snd_soc_component *component = rtd->codec_dai->component;
150 + struct snd_soc_card *card = rtd->card;
151 + struct snd_soc_pcm_runtime *wm8741_rtd;
152 + struct snd_soc_component *wm8741_component;
153 + struct snd_card *sound_card = card->snd_card;
154 + struct snd_kcontrol *kctl;
155 + int ret;
156 +
157 + wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
158 + if (!wm8741_rtd) {
159 + dev_warn(card->dev, "digidac1_soundcard_init: couldn't get wm8741 rtd\n");
160 + return -EFAULT;
161 + }
162 + wm8741_component = wm8741_rtd->codec_dai->component;
163 + ret = w8741_add_controls(wm8741_component);
164 + if (ret < 0)
165 + dev_warn(card->dev, "Failed to add new wm8741 controls: %d\n",
166 + ret);
167 +
168 + /* enable TX output */
169 + snd_soc_component_update_bits(component, WM8804_PWRDN, 0x4, 0x0);
170 +
171 + kctl = snd_soc_card_get_kcontrol(card,
172 + "Playback Volume");
173 + if (kctl) {
174 + kctl->vd[0].access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
175 + snd_ctl_remove(sound_card, kctl);
176 + }
177 + kctl = snd_soc_card_get_kcontrol(card,
178 + "Fine Playback Volume");
179 + if (kctl) {
180 + kctl->vd[0].access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
181 + snd_ctl_remove(sound_card, kctl);
182 + }
183 + return 0;
184 +}
185 +
186 +static int digidac1_soundcard_startup(struct snd_pcm_substream *substream)
187 +{
188 + /* turn on wm8804 digital output */
189 + struct snd_soc_pcm_runtime *rtd = substream->private_data;
190 + struct snd_soc_component *component = rtd->codec_dai->component;
191 + struct snd_soc_card *card = rtd->card;
192 + struct snd_soc_pcm_runtime *wm8741_rtd;
193 + struct snd_soc_component *wm8741_component;
194 +
195 + snd_soc_component_update_bits(component, WM8804_PWRDN, 0x3c, 0x00);
196 + wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
197 + if (!wm8741_rtd) {
198 + dev_warn(card->dev, "digidac1_soundcard_startup: couldn't get WM8741 rtd\n");
199 + return -EFAULT;
200 + }
201 + wm8741_component = wm8741_rtd->codec_dai->component;
202 +
203 + /* latch wm8741 level */
204 + snd_soc_component_update_bits(wm8741_component, WM8741_DACLLSB_ATTENUATION,
205 + WM8741_UPDATELL, WM8741_UPDATELL);
206 + snd_soc_component_update_bits(wm8741_component, WM8741_DACLMSB_ATTENUATION,
207 + WM8741_UPDATELM, WM8741_UPDATELM);
208 + snd_soc_component_update_bits(wm8741_component, WM8741_DACRLSB_ATTENUATION,
209 + WM8741_UPDATERL, WM8741_UPDATERL);
210 + snd_soc_component_update_bits(wm8741_component, WM8741_DACRMSB_ATTENUATION,
211 + WM8741_UPDATERM, WM8741_UPDATERM);
212 +
213 + return 0;
214 +}
215 +
216 +static void digidac1_soundcard_shutdown(struct snd_pcm_substream *substream)
217 +{
218 + /* turn off wm8804 digital output */
219 + struct snd_soc_pcm_runtime *rtd = substream->private_data;
220 + struct snd_soc_component *component = rtd->codec_dai->component;
221 +
222 + snd_soc_component_update_bits(component, WM8804_PWRDN, 0x3c, 0x3c);
223 +}
224 +
225 +static int digidac1_soundcard_hw_params(struct snd_pcm_substream *substream,
226 + struct snd_pcm_hw_params *params)
227 +{
228 + struct snd_soc_pcm_runtime *rtd = substream->private_data;
229 + struct snd_soc_dai *codec_dai = rtd->codec_dai;
230 + struct snd_soc_component *component = rtd->codec_dai->component;
231 + struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
232 + struct snd_soc_card *card = rtd->card;
233 + struct snd_soc_pcm_runtime *wm8741_rtd;
234 + struct snd_soc_component *wm8741_component;
235 +
236 + int sysclk = 27000000;
237 + long mclk_freq = 0;
238 + int mclk_div = 1;
239 + int sampling_freq = 1;
240 + int ret;
241 +
242 + wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
243 + if (!wm8741_rtd) {
244 + dev_warn(card->dev, "digidac1_soundcard_hw_params: couldn't get WM8741 rtd\n");
245 + return -EFAULT;
246 + }
247 + wm8741_component = wm8741_rtd->codec_dai->component;
248 + samplerate = params_rate(params);
249 +
250 + if (samplerate <= 96000) {
251 + mclk_freq = samplerate*256;
252 + mclk_div = WM8804_MCLKDIV_256FS;
253 + } else {
254 + mclk_freq = samplerate*128;
255 + mclk_div = WM8804_MCLKDIV_128FS;
256 + }
257 +
258 + switch (samplerate) {
259 + case 32000:
260 + sampling_freq = 0x03;
261 + break;
262 + case 44100:
263 + sampling_freq = 0x00;
264 + break;
265 + case 48000:
266 + sampling_freq = 0x02;
267 + break;
268 + case 88200:
269 + sampling_freq = 0x08;
270 + break;
271 + case 96000:
272 + sampling_freq = 0x0a;
273 + break;
274 + case 176400:
275 + sampling_freq = 0x0c;
276 + break;
277 + case 192000:
278 + sampling_freq = 0x0e;
279 + break;
280 + default:
281 + dev_err(card->dev,
282 + "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
283 + samplerate);
284 + }
285 +
286 + snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
287 + snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
288 +
289 + ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
290 + sysclk, SND_SOC_CLOCK_OUT);
291 + if (ret < 0) {
292 + dev_err(card->dev,
293 + "Failed to set WM8804 SYSCLK: %d\n", ret);
294 + return ret;
295 + }
296 + /* Enable wm8804 TX output */
297 + snd_soc_component_update_bits(component, WM8804_PWRDN, 0x4, 0x0);
298 +
299 + /* wm8804 Power on */
300 + snd_soc_component_update_bits(component, WM8804_PWRDN, 0x9, 0);
301 +
302 + /* wm8804 set sampling frequency status bits */
303 + snd_soc_component_update_bits(component, WM8804_SPDTX4, 0x0f, sampling_freq);
304 +
305 + /* Now update wm8741 registers for the correct oversampling */
306 + if (samplerate <= 48000)
307 + snd_soc_component_update_bits(wm8741_component, WM8741_MODE_CONTROL_1,
308 + WM8741_OSR_MASK, 0x00);
309 + else if (samplerate <= 96000)
310 + snd_soc_component_update_bits(wm8741_component, WM8741_MODE_CONTROL_1,
311 + WM8741_OSR_MASK, 0x20);
312 + else
313 + snd_soc_component_update_bits(wm8741_component, WM8741_MODE_CONTROL_1,
314 + WM8741_OSR_MASK, 0x40);
315 +
316 + /* wm8741 bit size */
317 + switch (params_width(params)) {
318 + case 16:
319 + snd_soc_component_update_bits(wm8741_component, WM8741_FORMAT_CONTROL,
320 + WM8741_IWL_MASK, 0x00);
321 + break;
322 + case 20:
323 + snd_soc_component_update_bits(wm8741_component, WM8741_FORMAT_CONTROL,
324 + WM8741_IWL_MASK, 0x01);
325 + break;
326 + case 24:
327 + snd_soc_component_update_bits(wm8741_component, WM8741_FORMAT_CONTROL,
328 + WM8741_IWL_MASK, 0x02);
329 + break;
330 + case 32:
331 + snd_soc_component_update_bits(wm8741_component, WM8741_FORMAT_CONTROL,
332 + WM8741_IWL_MASK, 0x03);
333 + break;
334 + default:
335 + dev_dbg(card->dev, "wm8741_hw_params: Unsupported bit size param = %d",
336 + params_width(params));
337 + return -EINVAL;
338 + }
339 +
340 + return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
341 +}
342 +/* machine stream operations */
343 +static struct snd_soc_ops digidac1_soundcard_ops = {
344 + .hw_params = digidac1_soundcard_hw_params,
345 + .startup = digidac1_soundcard_startup,
346 + .shutdown = digidac1_soundcard_shutdown,
347 +};
348 +
349 +static struct snd_soc_dai_link digidac1_soundcard_dai[] = {
350 + {
351 + .name = "RRA DigiDAC1",
352 + .stream_name = "RRA DigiDAC1 HiFi",
353 + .cpu_dai_name = "bcm2708-i2s.0",
354 + .codec_dai_name = "wm8804-spdif",
355 + .platform_name = "bcm2708-i2s.0",
356 + .codec_name = "wm8804.1-003b",
357 + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
358 + SND_SOC_DAIFMT_CBM_CFM,
359 + .ops = &digidac1_soundcard_ops,
360 + .init = digidac1_soundcard_init,
361 + },
362 + {
363 + .name = "RRA DigiDAC11",
364 + .stream_name = "RRA DigiDAC11 HiFi",
365 + .cpu_dai_name = "wm8804-spdif",
366 + .codec_dai_name = "wm8741",
367 + .codec_name = "wm8741.1-001a",
368 + .dai_fmt = SND_SOC_DAIFMT_I2S
369 + | SND_SOC_DAIFMT_NB_NF
370 + | SND_SOC_DAIFMT_CBS_CFS,
371 + },
372 +};
373 +
374 +/* audio machine driver */
375 +static struct snd_soc_card digidac1_soundcard = {
376 + .name = "digidac1-soundcard",
377 + .owner = THIS_MODULE,
378 + .dai_link = digidac1_soundcard_dai,
379 + .num_links = ARRAY_SIZE(digidac1_soundcard_dai),
380 +};
381 +
382 +static int digidac1_soundcard_probe(struct platform_device *pdev)
383 +{
384 + int ret = 0;
385 +
386 + digidac1_soundcard.dev = &pdev->dev;
387 +
388 + if (pdev->dev.of_node) {
389 + struct device_node *i2s_node;
390 + struct snd_soc_dai_link *dai = &digidac1_soundcard_dai[0];
391 +
392 + i2s_node = of_parse_phandle(pdev->dev.of_node,
393 + "i2s-controller", 0);
394 +
395 + if (i2s_node) {
396 + dai->cpu_dai_name = NULL;
397 + dai->cpu_of_node = i2s_node;
398 + dai->platform_name = NULL;
399 + dai->platform_of_node = i2s_node;
400 + }
401 + }
402 +
403 + ret = devm_snd_soc_register_card(&pdev->dev, &digidac1_soundcard);
404 + if (ret && ret != -EPROBE_DEFER)
405 + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
406 + ret);
407 +
408 + return ret;
409 +}
410 +
411 +static const struct of_device_id digidac1_soundcard_of_match[] = {
412 + { .compatible = "rra,digidac1-soundcard", },
413 + {},
414 +};
415 +MODULE_DEVICE_TABLE(of, digidac1_soundcard_of_match);
416 +
417 +static struct platform_driver digidac1_soundcard_driver = {
418 + .driver = {
419 + .name = "digidac1-audio",
420 + .owner = THIS_MODULE,
421 + .of_match_table = digidac1_soundcard_of_match,
422 + },
423 + .probe = digidac1_soundcard_probe,
424 +};
425 +
426 +module_platform_driver(digidac1_soundcard_driver);
427 +
428 +MODULE_AUTHOR("José M. Tasende <vintage@redrocksaudio.es>");
429 +MODULE_DESCRIPTION("ASoC Driver for RRA DigiDAC1");
430 +MODULE_LICENSE("GPL v2");
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