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