~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/wm8728.c

Version: ~ [ linux-6.1-rc7 ] ~ [ linux-6.0.10 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.80 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.156 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.225 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.267 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.300 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.334 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.302 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * wm8728.c  --  WM8728 ALSA SoC Audio driver
  3  *
  4  * Copyright 2008 Wolfson Microelectronics plc
  5  *
  6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License version 2 as
 10  * published by the Free Software Foundation.
 11  */
 12 
 13 #include <linux/module.h>
 14 #include <linux/moduleparam.h>
 15 #include <linux/init.h>
 16 #include <linux/delay.h>
 17 #include <linux/pm.h>
 18 #include <linux/i2c.h>
 19 #include <linux/platform_device.h>
 20 #include <linux/regmap.h>
 21 #include <linux/spi/spi.h>
 22 #include <linux/slab.h>
 23 #include <linux/of_device.h>
 24 #include <sound/core.h>
 25 #include <sound/pcm.h>
 26 #include <sound/pcm_params.h>
 27 #include <sound/soc.h>
 28 #include <sound/initval.h>
 29 #include <sound/tlv.h>
 30 
 31 #include "wm8728.h"
 32 
 33 /*
 34  * We can't read the WM8728 register space so we cache them instead.
 35  * Note that the defaults here aren't the physical defaults, we latch
 36  * the volume update bits, mute the output and enable infinite zero
 37  * detect.
 38  */
 39 static const struct reg_default wm8728_reg_defaults[] = {
 40         { 0, 0x1ff },
 41         { 1, 0x1ff },
 42         { 2, 0x001 },
 43         { 3, 0x100 },
 44 };
 45 
 46 /* codec private data */
 47 struct wm8728_priv {
 48         struct regmap *regmap;
 49 };
 50 
 51 static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
 52 
 53 static const struct snd_kcontrol_new wm8728_snd_controls[] = {
 54 
 55 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
 56                  0, 255, 0, wm8728_tlv),
 57 
 58 SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
 59 };
 60 
 61 /*
 62  * DAPM controls.
 63  */
 64 static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
 65 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
 66 SND_SOC_DAPM_OUTPUT("VOUTL"),
 67 SND_SOC_DAPM_OUTPUT("VOUTR"),
 68 };
 69 
 70 static const struct snd_soc_dapm_route wm8728_intercon[] = {
 71         {"VOUTL", NULL, "DAC"},
 72         {"VOUTR", NULL, "DAC"},
 73 };
 74 
 75 static int wm8728_mute(struct snd_soc_dai *dai, int mute)
 76 {
 77         struct snd_soc_component *component = dai->component;
 78         u16 mute_reg = snd_soc_component_read32(component, WM8728_DACCTL);
 79 
 80         if (mute)
 81                 snd_soc_component_write(component, WM8728_DACCTL, mute_reg | 1);
 82         else
 83                 snd_soc_component_write(component, WM8728_DACCTL, mute_reg & ~1);
 84 
 85         return 0;
 86 }
 87 
 88 static int wm8728_hw_params(struct snd_pcm_substream *substream,
 89         struct snd_pcm_hw_params *params,
 90         struct snd_soc_dai *dai)
 91 {
 92         struct snd_soc_component *component = dai->component;
 93         u16 dac = snd_soc_component_read32(component, WM8728_DACCTL);
 94 
 95         dac &= ~0x18;
 96 
 97         switch (params_width(params)) {
 98         case 16:
 99                 break;
100         case 20:
101                 dac |= 0x10;
102                 break;
103         case 24:
104                 dac |= 0x08;
105                 break;
106         default:
107                 return -EINVAL;
108         }
109 
110         snd_soc_component_write(component, WM8728_DACCTL, dac);
111 
112         return 0;
113 }
114 
115 static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
116                 unsigned int fmt)
117 {
118         struct snd_soc_component *component = codec_dai->component;
119         u16 iface = snd_soc_component_read32(component, WM8728_IFCTL);
120 
121         /* Currently only I2S is supported by the driver, though the
122          * hardware is more flexible.
123          */
124         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
125         case SND_SOC_DAIFMT_I2S:
126                 iface |= 1;
127                 break;
128         default:
129                 return -EINVAL;
130         }
131 
132         /* The hardware only support full slave mode */
133         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
134         case SND_SOC_DAIFMT_CBS_CFS:
135                 break;
136         default:
137                 return -EINVAL;
138         }
139 
140         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
141         case SND_SOC_DAIFMT_NB_NF:
142                 iface &= ~0x22;
143                 break;
144         case SND_SOC_DAIFMT_IB_NF:
145                 iface |=  0x20;
146                 iface &= ~0x02;
147                 break;
148         case SND_SOC_DAIFMT_NB_IF:
149                 iface |= 0x02;
150                 iface &= ~0x20;
151                 break;
152         case SND_SOC_DAIFMT_IB_IF:
153                 iface |= 0x22;
154                 break;
155         default:
156                 return -EINVAL;
157         }
158 
159         snd_soc_component_write(component, WM8728_IFCTL, iface);
160         return 0;
161 }
162 
163 static int wm8728_set_bias_level(struct snd_soc_component *component,
164                                  enum snd_soc_bias_level level)
165 {
166         struct wm8728_priv *wm8728 = snd_soc_component_get_drvdata(component);
167         u16 reg;
168 
169         switch (level) {
170         case SND_SOC_BIAS_ON:
171         case SND_SOC_BIAS_PREPARE:
172         case SND_SOC_BIAS_STANDBY:
173                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
174                         /* Power everything up... */
175                         reg = snd_soc_component_read32(component, WM8728_DACCTL);
176                         snd_soc_component_write(component, WM8728_DACCTL, reg & ~0x4);
177 
178                         /* ..then sync in the register cache. */
179                         regcache_sync(wm8728->regmap);
180                 }
181                 break;
182 
183         case SND_SOC_BIAS_OFF:
184                 reg = snd_soc_component_read32(component, WM8728_DACCTL);
185                 snd_soc_component_write(component, WM8728_DACCTL, reg | 0x4);
186                 break;
187         }
188         return 0;
189 }
190 
191 #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
192 
193 #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
194         SNDRV_PCM_FMTBIT_S24_LE)
195 
196 static const struct snd_soc_dai_ops wm8728_dai_ops = {
197         .hw_params      = wm8728_hw_params,
198         .digital_mute   = wm8728_mute,
199         .set_fmt        = wm8728_set_dai_fmt,
200 };
201 
202 static struct snd_soc_dai_driver wm8728_dai = {
203         .name = "wm8728-hifi",
204         .playback = {
205                 .stream_name = "Playback",
206                 .channels_min = 2,
207                 .channels_max = 2,
208                 .rates = WM8728_RATES,
209                 .formats = WM8728_FORMATS,
210         },
211         .ops = &wm8728_dai_ops,
212 };
213 
214 static const struct snd_soc_component_driver soc_component_dev_wm8728 = {
215         .set_bias_level         = wm8728_set_bias_level,
216         .controls               = wm8728_snd_controls,
217         .num_controls           = ARRAY_SIZE(wm8728_snd_controls),
218         .dapm_widgets           = wm8728_dapm_widgets,
219         .num_dapm_widgets       = ARRAY_SIZE(wm8728_dapm_widgets),
220         .dapm_routes            = wm8728_intercon,
221         .num_dapm_routes        = ARRAY_SIZE(wm8728_intercon),
222         .suspend_bias_off       = 1,
223         .idle_bias_on           = 1,
224         .use_pmdown_time        = 1,
225         .endianness             = 1,
226         .non_legacy_dai_naming  = 1,
227 };
228 
229 static const struct of_device_id wm8728_of_match[] = {
230         { .compatible = "wlf,wm8728", },
231         { }
232 };
233 MODULE_DEVICE_TABLE(of, wm8728_of_match);
234 
235 static const struct regmap_config wm8728_regmap = {
236         .reg_bits = 7,
237         .val_bits = 9,
238         .max_register = WM8728_IFCTL,
239 
240         .reg_defaults = wm8728_reg_defaults,
241         .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults),
242         .cache_type = REGCACHE_RBTREE,
243 };
244 
245 #if defined(CONFIG_SPI_MASTER)
246 static int wm8728_spi_probe(struct spi_device *spi)
247 {
248         struct wm8728_priv *wm8728;
249         int ret;
250 
251         wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv),
252                               GFP_KERNEL);
253         if (wm8728 == NULL)
254                 return -ENOMEM;
255 
256         wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap);
257         if (IS_ERR(wm8728->regmap))
258                 return PTR_ERR(wm8728->regmap);
259 
260         spi_set_drvdata(spi, wm8728);
261 
262         ret = devm_snd_soc_register_component(&spi->dev,
263                         &soc_component_dev_wm8728, &wm8728_dai, 1);
264 
265         return ret;
266 }
267 
268 static struct spi_driver wm8728_spi_driver = {
269         .driver = {
270                 .name   = "wm8728",
271                 .of_match_table = wm8728_of_match,
272         },
273         .probe          = wm8728_spi_probe,
274 };
275 #endif /* CONFIG_SPI_MASTER */
276 
277 #if IS_ENABLED(CONFIG_I2C)
278 static int wm8728_i2c_probe(struct i2c_client *i2c,
279                             const struct i2c_device_id *id)
280 {
281         struct wm8728_priv *wm8728;
282         int ret;
283 
284         wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv),
285                               GFP_KERNEL);
286         if (wm8728 == NULL)
287                 return -ENOMEM;
288 
289         wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap);
290         if (IS_ERR(wm8728->regmap))
291                 return PTR_ERR(wm8728->regmap);
292 
293         i2c_set_clientdata(i2c, wm8728);
294 
295         ret =  devm_snd_soc_register_component(&i2c->dev,
296                         &soc_component_dev_wm8728, &wm8728_dai, 1);
297 
298         return ret;
299 }
300 
301 static const struct i2c_device_id wm8728_i2c_id[] = {
302         { "wm8728", 0 },
303         { }
304 };
305 MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
306 
307 static struct i2c_driver wm8728_i2c_driver = {
308         .driver = {
309                 .name = "wm8728",
310                 .of_match_table = wm8728_of_match,
311         },
312         .probe =    wm8728_i2c_probe,
313         .id_table = wm8728_i2c_id,
314 };
315 #endif
316 
317 static int __init wm8728_modinit(void)
318 {
319         int ret = 0;
320 #if IS_ENABLED(CONFIG_I2C)
321         ret = i2c_add_driver(&wm8728_i2c_driver);
322         if (ret != 0) {
323                 printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
324                        ret);
325         }
326 #endif
327 #if defined(CONFIG_SPI_MASTER)
328         ret = spi_register_driver(&wm8728_spi_driver);
329         if (ret != 0) {
330                 printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
331                        ret);
332         }
333 #endif
334         return ret;
335 }
336 module_init(wm8728_modinit);
337 
338 static void __exit wm8728_exit(void)
339 {
340 #if IS_ENABLED(CONFIG_I2C)
341         i2c_del_driver(&wm8728_i2c_driver);
342 #endif
343 #if defined(CONFIG_SPI_MASTER)
344         spi_unregister_driver(&wm8728_spi_driver);
345 #endif
346 }
347 module_exit(wm8728_exit);
348 
349 MODULE_DESCRIPTION("ASoC WM8728 driver");
350 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
351 MODULE_LICENSE("GPL");
352 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp