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a381934e DM |
1 | /* |
2 | * AK4104 ALSA SoC (ASoC) driver | |
3 | * | |
4 | * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
a381934e | 14 | #include <linux/spi/spi.h> |
385a4c2e DM |
15 | #include <linux/of_device.h> |
16 | #include <linux/of_gpio.h> | |
b38d10ed | 17 | #include <linux/regulator/consumer.h> |
a381934e | 18 | #include <sound/asoundef.h> |
b38d10ed DM |
19 | #include <sound/core.h> |
20 | #include <sound/soc.h> | |
21 | #include <sound/initval.h> | |
a381934e | 22 | |
a381934e DM |
23 | /* AK4104 registers addresses */ |
24 | #define AK4104_REG_CONTROL1 0x00 | |
25 | #define AK4104_REG_RESERVED 0x01 | |
26 | #define AK4104_REG_CONTROL2 0x02 | |
27 | #define AK4104_REG_TX 0x03 | |
28 | #define AK4104_REG_CHN_STATUS(x) ((x) + 0x04) | |
29 | #define AK4104_NUM_REGS 10 | |
30 | ||
31 | #define AK4104_REG_MASK 0x1f | |
32 | #define AK4104_READ 0xc0 | |
33 | #define AK4104_WRITE 0xe0 | |
34 | #define AK4104_RESERVED_VAL 0x5b | |
35 | ||
36 | /* Bit masks for AK4104 registers */ | |
37 | #define AK4104_CONTROL1_RSTN (1 << 0) | |
38 | #define AK4104_CONTROL1_PW (1 << 1) | |
39 | #define AK4104_CONTROL1_DIF0 (1 << 2) | |
40 | #define AK4104_CONTROL1_DIF1 (1 << 3) | |
41 | ||
42 | #define AK4104_CONTROL2_SEL0 (1 << 0) | |
43 | #define AK4104_CONTROL2_SEL1 (1 << 1) | |
44 | #define AK4104_CONTROL2_MODE (1 << 2) | |
45 | ||
46 | #define AK4104_TX_TXE (1 << 0) | |
47 | #define AK4104_TX_V (1 << 1) | |
48 | ||
a381934e | 49 | struct ak4104_private { |
2901d6eb | 50 | struct regmap *regmap; |
b38d10ed | 51 | struct regulator *regulator; |
a381934e DM |
52 | }; |
53 | ||
2e61926c | 54 | static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = { |
a5db4d50 MB |
55 | SND_SOC_DAPM_PGA("TXE", AK4104_REG_TX, AK4104_TX_TXE, 0, NULL, 0), |
56 | ||
2e61926c MB |
57 | SND_SOC_DAPM_OUTPUT("TX"), |
58 | }; | |
59 | ||
60 | static const struct snd_soc_dapm_route ak4104_dapm_routes[] = { | |
a5db4d50 MB |
61 | { "TXE", NULL, "Playback" }, |
62 | { "TX", NULL, "TXE" }, | |
2e61926c MB |
63 | }; |
64 | ||
a381934e DM |
65 | static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai, |
66 | unsigned int format) | |
67 | { | |
68 | struct snd_soc_codec *codec = codec_dai->codec; | |
b0ec761b | 69 | struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec); |
a381934e | 70 | int val = 0; |
2901d6eb | 71 | int ret; |
a381934e | 72 | |
a381934e DM |
73 | /* set DAI format */ |
74 | switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { | |
75 | case SND_SOC_DAIFMT_RIGHT_J: | |
76 | break; | |
77 | case SND_SOC_DAIFMT_LEFT_J: | |
78 | val |= AK4104_CONTROL1_DIF0; | |
79 | break; | |
80 | case SND_SOC_DAIFMT_I2S: | |
81 | val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1; | |
82 | break; | |
83 | default: | |
84 | dev_err(codec->dev, "invalid dai format\n"); | |
85 | return -EINVAL; | |
86 | } | |
87 | ||
88 | /* This device can only be slave */ | |
89 | if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) | |
90 | return -EINVAL; | |
91 | ||
b0ec761b DM |
92 | ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1, |
93 | AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1, | |
94 | val); | |
afad95f8 MB |
95 | if (ret < 0) |
96 | return ret; | |
97 | ||
98 | return 0; | |
a381934e DM |
99 | } |
100 | ||
101 | static int ak4104_hw_params(struct snd_pcm_substream *substream, | |
102 | struct snd_pcm_hw_params *params, | |
103 | struct snd_soc_dai *dai) | |
104 | { | |
e6968a17 | 105 | struct snd_soc_codec *codec = dai->codec; |
b0ec761b | 106 | struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec); |
b692a436 | 107 | int ret, val = 0; |
a381934e DM |
108 | |
109 | /* set the IEC958 bits: consumer mode, no copyright bit */ | |
110 | val |= IEC958_AES0_CON_NOT_COPYRIGHT; | |
b0ec761b | 111 | regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val); |
a381934e DM |
112 | |
113 | val = 0; | |
114 | ||
115 | switch (params_rate(params)) { | |
08201deb DM |
116 | case 22050: |
117 | val |= IEC958_AES3_CON_FS_22050; | |
118 | break; | |
119 | case 24000: | |
120 | val |= IEC958_AES3_CON_FS_24000; | |
121 | break; | |
122 | case 32000: | |
123 | val |= IEC958_AES3_CON_FS_32000; | |
124 | break; | |
a381934e DM |
125 | case 44100: |
126 | val |= IEC958_AES3_CON_FS_44100; | |
127 | break; | |
128 | case 48000: | |
129 | val |= IEC958_AES3_CON_FS_48000; | |
130 | break; | |
08201deb DM |
131 | case 88200: |
132 | val |= IEC958_AES3_CON_FS_88200; | |
133 | break; | |
134 | case 96000: | |
135 | val |= IEC958_AES3_CON_FS_96000; | |
136 | break; | |
137 | case 176400: | |
138 | val |= IEC958_AES3_CON_FS_176400; | |
139 | break; | |
140 | case 192000: | |
141 | val |= IEC958_AES3_CON_FS_192000; | |
a381934e DM |
142 | break; |
143 | default: | |
144 | dev_err(codec->dev, "unsupported sampling rate\n"); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
b692a436 DM |
148 | ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val); |
149 | if (ret < 0) | |
150 | return ret; | |
151 | ||
b692a436 DM |
152 | return 0; |
153 | } | |
154 | ||
85e7652d | 155 | static const struct snd_soc_dai_ops ak4101_dai_ops = { |
65ec1cd1 MB |
156 | .hw_params = ak4104_hw_params, |
157 | .set_fmt = ak4104_set_dai_fmt, | |
158 | }; | |
159 | ||
f0fba2ad LG |
160 | static struct snd_soc_dai_driver ak4104_dai = { |
161 | .name = "ak4104-hifi", | |
a381934e DM |
162 | .playback = { |
163 | .stream_name = "Playback", | |
164 | .channels_min = 2, | |
165 | .channels_max = 2, | |
617b14c5 | 166 | .rates = SNDRV_PCM_RATE_8000_192000, |
a381934e DM |
167 | .formats = SNDRV_PCM_FMTBIT_S16_LE | |
168 | SNDRV_PCM_FMTBIT_S24_3LE | | |
169 | SNDRV_PCM_FMTBIT_S24_LE | |
170 | }, | |
65ec1cd1 | 171 | .ops = &ak4101_dai_ops, |
a381934e DM |
172 | }; |
173 | ||
f0fba2ad | 174 | static int ak4104_probe(struct snd_soc_codec *codec) |
a381934e | 175 | { |
f0fba2ad | 176 | struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec); |
2901d6eb | 177 | int ret; |
a381934e | 178 | |
b38d10ed DM |
179 | ret = regulator_enable(ak4104->regulator); |
180 | if (ret < 0) { | |
181 | dev_err(codec->dev, "Unable to enable regulator: %d\n", ret); | |
182 | return ret; | |
183 | } | |
184 | ||
a381934e | 185 | /* set power-up and non-reset bits */ |
b0ec761b DM |
186 | ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1, |
187 | AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, | |
188 | AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN); | |
a381934e | 189 | if (ret < 0) |
b38d10ed | 190 | goto exit_disable_regulator; |
a381934e DM |
191 | |
192 | /* enable transmitter */ | |
b0ec761b DM |
193 | ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX, |
194 | AK4104_TX_TXE, AK4104_TX_TXE); | |
a381934e | 195 | if (ret < 0) |
b38d10ed | 196 | goto exit_disable_regulator; |
a381934e | 197 | |
a381934e | 198 | return 0; |
b38d10ed DM |
199 | |
200 | exit_disable_regulator: | |
201 | regulator_disable(ak4104->regulator); | |
202 | return ret; | |
a381934e DM |
203 | } |
204 | ||
f0fba2ad | 205 | static int ak4104_remove(struct snd_soc_codec *codec) |
a381934e | 206 | { |
b0ec761b DM |
207 | struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec); |
208 | ||
209 | regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1, | |
210 | AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0); | |
b38d10ed DM |
211 | regulator_disable(ak4104->regulator); |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | #ifdef CONFIG_PM | |
217 | static int ak4104_soc_suspend(struct snd_soc_codec *codec) | |
218 | { | |
219 | struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec); | |
220 | ||
221 | regulator_disable(priv->regulator); | |
a381934e | 222 | |
afad95f8 | 223 | return 0; |
a381934e DM |
224 | } |
225 | ||
b38d10ed DM |
226 | static int ak4104_soc_resume(struct snd_soc_codec *codec) |
227 | { | |
228 | struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec); | |
229 | int ret; | |
230 | ||
231 | ret = regulator_enable(priv->regulator); | |
232 | if (ret < 0) | |
233 | return ret; | |
234 | ||
235 | return 0; | |
236 | } | |
237 | #else | |
238 | #define ak4104_soc_suspend NULL | |
239 | #define ak4104_soc_resume NULL | |
240 | #endif /* CONFIG_PM */ | |
241 | ||
f0fba2ad | 242 | static struct snd_soc_codec_driver soc_codec_device_ak4104 = { |
b38d10ed DM |
243 | .probe = ak4104_probe, |
244 | .remove = ak4104_remove, | |
245 | .suspend = ak4104_soc_suspend, | |
246 | .resume = ak4104_soc_resume, | |
2e61926c MB |
247 | |
248 | .dapm_widgets = ak4104_dapm_widgets, | |
249 | .num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets), | |
250 | .dapm_routes = ak4104_dapm_routes, | |
251 | .num_dapm_routes = ARRAY_SIZE(ak4104_dapm_routes), | |
2901d6eb MB |
252 | }; |
253 | ||
254 | static const struct regmap_config ak4104_regmap = { | |
255 | .reg_bits = 8, | |
256 | .val_bits = 8, | |
257 | ||
258 | .max_register = AK4104_NUM_REGS - 1, | |
259 | .read_flag_mask = AK4104_READ, | |
260 | .write_flag_mask = AK4104_WRITE, | |
261 | ||
262 | .cache_type = REGCACHE_RBTREE, | |
f0fba2ad LG |
263 | }; |
264 | ||
265 | static int ak4104_spi_probe(struct spi_device *spi) | |
a381934e | 266 | { |
385a4c2e | 267 | struct device_node *np = spi->dev.of_node; |
f0fba2ad | 268 | struct ak4104_private *ak4104; |
2901d6eb | 269 | unsigned int val; |
a381934e DM |
270 | int ret; |
271 | ||
f0fba2ad LG |
272 | spi->bits_per_word = 8; |
273 | spi->mode = SPI_MODE_0; | |
274 | ret = spi_setup(spi); | |
275 | if (ret < 0) | |
a381934e | 276 | return ret; |
a381934e | 277 | |
3922d518 AL |
278 | ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private), |
279 | GFP_KERNEL); | |
f0fba2ad LG |
280 | if (ak4104 == NULL) |
281 | return -ENOMEM; | |
282 | ||
b38d10ed DM |
283 | ak4104->regulator = devm_regulator_get(&spi->dev, "vdd"); |
284 | if (IS_ERR(ak4104->regulator)) { | |
285 | ret = PTR_ERR(ak4104->regulator); | |
286 | dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret); | |
287 | return ret; | |
288 | } | |
289 | ||
a273cd13 | 290 | ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap); |
2901d6eb MB |
291 | if (IS_ERR(ak4104->regmap)) { |
292 | ret = PTR_ERR(ak4104->regmap); | |
293 | return ret; | |
294 | } | |
295 | ||
385a4c2e DM |
296 | if (np) { |
297 | enum of_gpio_flags flags; | |
298 | int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags); | |
299 | ||
300 | if (gpio_is_valid(gpio)) { | |
301 | ret = devm_gpio_request_one(&spi->dev, gpio, | |
302 | flags & OF_GPIO_ACTIVE_LOW ? | |
303 | GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH, | |
304 | "ak4104 reset"); | |
305 | if (ret < 0) | |
306 | return ret; | |
307 | } | |
308 | } | |
309 | ||
2901d6eb MB |
310 | /* read the 'reserved' register - according to the datasheet, it |
311 | * should contain 0x5b. Not a good way to verify the presence of | |
312 | * the device, but there is no hardware ID register. */ | |
313 | ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val); | |
314 | if (ret != 0) | |
a273cd13 TB |
315 | return ret; |
316 | if (val != AK4104_RESERVED_VAL) | |
317 | return -ENODEV; | |
2901d6eb | 318 | |
f0fba2ad LG |
319 | spi_set_drvdata(spi, ak4104); |
320 | ||
321 | ret = snd_soc_register_codec(&spi->dev, | |
322 | &soc_codec_device_ak4104, &ak4104_dai, 1); | |
f0fba2ad | 323 | return ret; |
a381934e DM |
324 | } |
325 | ||
7a79e94e | 326 | static int ak4104_spi_remove(struct spi_device *spi) |
a381934e | 327 | { |
f0fba2ad | 328 | snd_soc_unregister_codec(&spi->dev); |
a381934e | 329 | return 0; |
f0fba2ad | 330 | } |
a381934e | 331 | |
ac5dbea0 DM |
332 | static const struct of_device_id ak4104_of_match[] = { |
333 | { .compatible = "asahi-kasei,ak4104", }, | |
334 | { } | |
335 | }; | |
336 | MODULE_DEVICE_TABLE(of, ak4104_of_match); | |
337 | ||
193b2f65 DM |
338 | static const struct spi_device_id ak4104_id_table[] = { |
339 | { "ak4104", 0 }, | |
340 | { } | |
341 | }; | |
342 | MODULE_DEVICE_TABLE(spi, ak4104_id_table); | |
343 | ||
a381934e DM |
344 | static struct spi_driver ak4104_spi_driver = { |
345 | .driver = { | |
193b2f65 | 346 | .name = "ak4104", |
a381934e | 347 | .owner = THIS_MODULE, |
ac5dbea0 | 348 | .of_match_table = ak4104_of_match, |
a381934e | 349 | }, |
193b2f65 | 350 | .id_table = ak4104_id_table, |
a381934e | 351 | .probe = ak4104_spi_probe, |
7a79e94e | 352 | .remove = ak4104_spi_remove, |
a381934e DM |
353 | }; |
354 | ||
38d78baf | 355 | module_spi_driver(ak4104_spi_driver); |
a381934e DM |
356 | |
357 | MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>"); | |
358 | MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver"); | |
359 | MODULE_LICENSE("GPL"); | |
360 |