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10#include <linux/module.h>
11#include <linux/moduleparam.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14#include <linux/pm.h>
15#include <linux/i2c.h>
16#include <linux/platform_device.h>
17#include <linux/regmap.h>
18#include <linux/spi/spi.h>
19#include <linux/slab.h>
20#include <linux/of_device.h>
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25#include <sound/initval.h>
26#include <sound/tlv.h>
27
28#include "wm8728.h"
29
30
31
32
33
34
35
36static const struct reg_default wm8728_reg_defaults[] = {
37 { 0, 0x1ff },
38 { 1, 0x1ff },
39 { 2, 0x001 },
40 { 3, 0x100 },
41};
42
43
44struct wm8728_priv {
45 struct regmap *regmap;
46};
47
48static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
49
50static const struct snd_kcontrol_new wm8728_snd_controls[] = {
51
52SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
53 0, 255, 0, wm8728_tlv),
54
55SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
56};
57
58
59
60
61static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
62SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
63SND_SOC_DAPM_OUTPUT("VOUTL"),
64SND_SOC_DAPM_OUTPUT("VOUTR"),
65};
66
67static const struct snd_soc_dapm_route wm8728_intercon[] = {
68 {"VOUTL", NULL, "DAC"},
69 {"VOUTR", NULL, "DAC"},
70};
71
72static int wm8728_mute(struct snd_soc_dai *dai, int mute, int direction)
73{
74 struct snd_soc_component *component = dai->component;
75 u16 mute_reg = snd_soc_component_read(component, WM8728_DACCTL);
76
77 if (mute)
78 snd_soc_component_write(component, WM8728_DACCTL, mute_reg | 1);
79 else
80 snd_soc_component_write(component, WM8728_DACCTL, mute_reg & ~1);
81
82 return 0;
83}
84
85static int wm8728_hw_params(struct snd_pcm_substream *substream,
86 struct snd_pcm_hw_params *params,
87 struct snd_soc_dai *dai)
88{
89 struct snd_soc_component *component = dai->component;
90 u16 dac = snd_soc_component_read(component, WM8728_DACCTL);
91
92 dac &= ~0x18;
93
94 switch (params_width(params)) {
95 case 16:
96 break;
97 case 20:
98 dac |= 0x10;
99 break;
100 case 24:
101 dac |= 0x08;
102 break;
103 default:
104 return -EINVAL;
105 }
106
107 snd_soc_component_write(component, WM8728_DACCTL, dac);
108
109 return 0;
110}
111
112static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
113 unsigned int fmt)
114{
115 struct snd_soc_component *component = codec_dai->component;
116 u16 iface = snd_soc_component_read(component, WM8728_IFCTL);
117
118
119
120
121 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
122 case SND_SOC_DAIFMT_I2S:
123 iface |= 1;
124 break;
125 default:
126 return -EINVAL;
127 }
128
129
130 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
131 case SND_SOC_DAIFMT_CBS_CFS:
132 break;
133 default:
134 return -EINVAL;
135 }
136
137 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
138 case SND_SOC_DAIFMT_NB_NF:
139 iface &= ~0x22;
140 break;
141 case SND_SOC_DAIFMT_IB_NF:
142 iface |= 0x20;
143 iface &= ~0x02;
144 break;
145 case SND_SOC_DAIFMT_NB_IF:
146 iface |= 0x02;
147 iface &= ~0x20;
148 break;
149 case SND_SOC_DAIFMT_IB_IF:
150 iface |= 0x22;
151 break;
152 default:
153 return -EINVAL;
154 }
155
156 snd_soc_component_write(component, WM8728_IFCTL, iface);
157 return 0;
158}
159
160static int wm8728_set_bias_level(struct snd_soc_component *component,
161 enum snd_soc_bias_level level)
162{
163 struct wm8728_priv *wm8728 = snd_soc_component_get_drvdata(component);
164 u16 reg;
165
166 switch (level) {
167 case SND_SOC_BIAS_ON:
168 case SND_SOC_BIAS_PREPARE:
169 case SND_SOC_BIAS_STANDBY:
170 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
171
172 reg = snd_soc_component_read(component, WM8728_DACCTL);
173 snd_soc_component_write(component, WM8728_DACCTL, reg & ~0x4);
174
175
176 regcache_sync(wm8728->regmap);
177 }
178 break;
179
180 case SND_SOC_BIAS_OFF:
181 reg = snd_soc_component_read(component, WM8728_DACCTL);
182 snd_soc_component_write(component, WM8728_DACCTL, reg | 0x4);
183 break;
184 }
185 return 0;
186}
187
188#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
189
190#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
191 SNDRV_PCM_FMTBIT_S24_LE)
192
193static const struct snd_soc_dai_ops wm8728_dai_ops = {
194 .hw_params = wm8728_hw_params,
195 .mute_stream = wm8728_mute,
196 .set_fmt = wm8728_set_dai_fmt,
197 .no_capture_mute = 1,
198};
199
200static struct snd_soc_dai_driver wm8728_dai = {
201 .name = "wm8728-hifi",
202 .playback = {
203 .stream_name = "Playback",
204 .channels_min = 2,
205 .channels_max = 2,
206 .rates = WM8728_RATES,
207 .formats = WM8728_FORMATS,
208 },
209 .ops = &wm8728_dai_ops,
210};
211
212static const struct snd_soc_component_driver soc_component_dev_wm8728 = {
213 .set_bias_level = wm8728_set_bias_level,
214 .controls = wm8728_snd_controls,
215 .num_controls = ARRAY_SIZE(wm8728_snd_controls),
216 .dapm_widgets = wm8728_dapm_widgets,
217 .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets),
218 .dapm_routes = wm8728_intercon,
219 .num_dapm_routes = ARRAY_SIZE(wm8728_intercon),
220 .suspend_bias_off = 1,
221 .idle_bias_on = 1,
222 .use_pmdown_time = 1,
223 .endianness = 1,
224 .non_legacy_dai_naming = 1,
225};
226
227static const struct of_device_id wm8728_of_match[] = {
228 { .compatible = "wlf,wm8728", },
229 { }
230};
231MODULE_DEVICE_TABLE(of, wm8728_of_match);
232
233static const struct regmap_config wm8728_regmap = {
234 .reg_bits = 7,
235 .val_bits = 9,
236 .max_register = WM8728_IFCTL,
237
238 .reg_defaults = wm8728_reg_defaults,
239 .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults),
240 .cache_type = REGCACHE_RBTREE,
241};
242
243#if defined(CONFIG_SPI_MASTER)
244static int wm8728_spi_probe(struct spi_device *spi)
245{
246 struct wm8728_priv *wm8728;
247 int ret;
248
249 wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv),
250 GFP_KERNEL);
251 if (wm8728 == NULL)
252 return -ENOMEM;
253
254 wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap);
255 if (IS_ERR(wm8728->regmap))
256 return PTR_ERR(wm8728->regmap);
257
258 spi_set_drvdata(spi, wm8728);
259
260 ret = devm_snd_soc_register_component(&spi->dev,
261 &soc_component_dev_wm8728, &wm8728_dai, 1);
262
263 return ret;
264}
265
266static struct spi_driver wm8728_spi_driver = {
267 .driver = {
268 .name = "wm8728",
269 .of_match_table = wm8728_of_match,
270 },
271 .probe = wm8728_spi_probe,
272};
273#endif
274
275#if IS_ENABLED(CONFIG_I2C)
276static int wm8728_i2c_probe(struct i2c_client *i2c,
277 const struct i2c_device_id *id)
278{
279 struct wm8728_priv *wm8728;
280 int ret;
281
282 wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv),
283 GFP_KERNEL);
284 if (wm8728 == NULL)
285 return -ENOMEM;
286
287 wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap);
288 if (IS_ERR(wm8728->regmap))
289 return PTR_ERR(wm8728->regmap);
290
291 i2c_set_clientdata(i2c, wm8728);
292
293 ret = devm_snd_soc_register_component(&i2c->dev,
294 &soc_component_dev_wm8728, &wm8728_dai, 1);
295
296 return ret;
297}
298
299static const struct i2c_device_id wm8728_i2c_id[] = {
300 { "wm8728", 0 },
301 { }
302};
303MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
304
305static struct i2c_driver wm8728_i2c_driver = {
306 .driver = {
307 .name = "wm8728",
308 .of_match_table = wm8728_of_match,
309 },
310 .probe = wm8728_i2c_probe,
311 .id_table = wm8728_i2c_id,
312};
313#endif
314
315static int __init wm8728_modinit(void)
316{
317 int ret = 0;
318#if IS_ENABLED(CONFIG_I2C)
319 ret = i2c_add_driver(&wm8728_i2c_driver);
320 if (ret != 0) {
321 printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
322 ret);
323 }
324#endif
325#if defined(CONFIG_SPI_MASTER)
326 ret = spi_register_driver(&wm8728_spi_driver);
327 if (ret != 0) {
328 printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
329 ret);
330 }
331#endif
332 return ret;
333}
334module_init(wm8728_modinit);
335
336static void __exit wm8728_exit(void)
337{
338#if IS_ENABLED(CONFIG_I2C)
339 i2c_del_driver(&wm8728_i2c_driver);
340#endif
341#if defined(CONFIG_SPI_MASTER)
342 spi_unregister_driver(&wm8728_spi_driver);
343#endif
344}
345module_exit(wm8728_exit);
346
347MODULE_DESCRIPTION("ASoC WM8728 driver");
348MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
349MODULE_LICENSE("GPL");
350
