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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> | |
18 | #include <sound/asoundef.h> | |
19 | ||
a381934e DM |
20 | /* AK4104 registers addresses */ |
21 | #define AK4104_REG_CONTROL1 0x00 | |
22 | #define AK4104_REG_RESERVED 0x01 | |
23 | #define AK4104_REG_CONTROL2 0x02 | |
24 | #define AK4104_REG_TX 0x03 | |
25 | #define AK4104_REG_CHN_STATUS(x) ((x) + 0x04) | |
26 | #define AK4104_NUM_REGS 10 | |
27 | ||
28 | #define AK4104_REG_MASK 0x1f | |
29 | #define AK4104_READ 0xc0 | |
30 | #define AK4104_WRITE 0xe0 | |
31 | #define AK4104_RESERVED_VAL 0x5b | |
32 | ||
33 | /* Bit masks for AK4104 registers */ | |
34 | #define AK4104_CONTROL1_RSTN (1 << 0) | |
35 | #define AK4104_CONTROL1_PW (1 << 1) | |
36 | #define AK4104_CONTROL1_DIF0 (1 << 2) | |
37 | #define AK4104_CONTROL1_DIF1 (1 << 3) | |
38 | ||
39 | #define AK4104_CONTROL2_SEL0 (1 << 0) | |
40 | #define AK4104_CONTROL2_SEL1 (1 << 1) | |
41 | #define AK4104_CONTROL2_MODE (1 << 2) | |
42 | ||
43 | #define AK4104_TX_TXE (1 << 0) | |
44 | #define AK4104_TX_V (1 << 1) | |
45 | ||
f0fba2ad | 46 | #define DRV_NAME "ak4104-codec" |
a381934e DM |
47 | |
48 | struct ak4104_private { | |
2901d6eb | 49 | struct regmap *regmap; |
a381934e DM |
50 | }; |
51 | ||
a381934e DM |
52 | static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai, |
53 | unsigned int format) | |
54 | { | |
55 | struct snd_soc_codec *codec = codec_dai->codec; | |
56 | int val = 0; | |
2901d6eb | 57 | int ret; |
a381934e | 58 | |
a381934e DM |
59 | /* set DAI format */ |
60 | switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { | |
61 | case SND_SOC_DAIFMT_RIGHT_J: | |
62 | break; | |
63 | case SND_SOC_DAIFMT_LEFT_J: | |
64 | val |= AK4104_CONTROL1_DIF0; | |
65 | break; | |
66 | case SND_SOC_DAIFMT_I2S: | |
67 | val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1; | |
68 | break; | |
69 | default: | |
70 | dev_err(codec->dev, "invalid dai format\n"); | |
71 | return -EINVAL; | |
72 | } | |
73 | ||
74 | /* This device can only be slave */ | |
75 | if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) | |
76 | return -EINVAL; | |
77 | ||
afad95f8 MB |
78 | ret = snd_soc_update_bits(codec, AK4104_REG_CONTROL1, |
79 | AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1, | |
80 | val); | |
81 | if (ret < 0) | |
82 | return ret; | |
83 | ||
84 | return 0; | |
a381934e DM |
85 | } |
86 | ||
87 | static int ak4104_hw_params(struct snd_pcm_substream *substream, | |
88 | struct snd_pcm_hw_params *params, | |
89 | struct snd_soc_dai *dai) | |
90 | { | |
91 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 92 | struct snd_soc_codec *codec = rtd->codec; |
a381934e DM |
93 | int val = 0; |
94 | ||
95 | /* set the IEC958 bits: consumer mode, no copyright bit */ | |
96 | val |= IEC958_AES0_CON_NOT_COPYRIGHT; | |
34baf220 | 97 | snd_soc_write(codec, AK4104_REG_CHN_STATUS(0), val); |
a381934e DM |
98 | |
99 | val = 0; | |
100 | ||
101 | switch (params_rate(params)) { | |
102 | case 44100: | |
103 | val |= IEC958_AES3_CON_FS_44100; | |
104 | break; | |
105 | case 48000: | |
106 | val |= IEC958_AES3_CON_FS_48000; | |
107 | break; | |
108 | case 32000: | |
109 | val |= IEC958_AES3_CON_FS_32000; | |
110 | break; | |
111 | default: | |
112 | dev_err(codec->dev, "unsupported sampling rate\n"); | |
113 | return -EINVAL; | |
114 | } | |
115 | ||
34baf220 | 116 | return snd_soc_write(codec, AK4104_REG_CHN_STATUS(3), val); |
a381934e DM |
117 | } |
118 | ||
85e7652d | 119 | static const struct snd_soc_dai_ops ak4101_dai_ops = { |
65ec1cd1 MB |
120 | .hw_params = ak4104_hw_params, |
121 | .set_fmt = ak4104_set_dai_fmt, | |
122 | }; | |
123 | ||
f0fba2ad LG |
124 | static struct snd_soc_dai_driver ak4104_dai = { |
125 | .name = "ak4104-hifi", | |
a381934e DM |
126 | .playback = { |
127 | .stream_name = "Playback", | |
128 | .channels_min = 2, | |
129 | .channels_max = 2, | |
617b14c5 | 130 | .rates = SNDRV_PCM_RATE_8000_192000, |
a381934e DM |
131 | .formats = SNDRV_PCM_FMTBIT_S16_LE | |
132 | SNDRV_PCM_FMTBIT_S24_3LE | | |
133 | SNDRV_PCM_FMTBIT_S24_LE | |
134 | }, | |
65ec1cd1 | 135 | .ops = &ak4101_dai_ops, |
a381934e DM |
136 | }; |
137 | ||
f0fba2ad | 138 | static int ak4104_probe(struct snd_soc_codec *codec) |
a381934e | 139 | { |
f0fba2ad | 140 | struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec); |
2901d6eb | 141 | int ret; |
a381934e | 142 | |
2901d6eb MB |
143 | codec->control_data = ak4104->regmap; |
144 | ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP); | |
145 | if (ret != 0) | |
a381934e | 146 | return ret; |
a381934e DM |
147 | |
148 | /* set power-up and non-reset bits */ | |
afad95f8 MB |
149 | ret = snd_soc_update_bits(codec, AK4104_REG_CONTROL1, |
150 | AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, | |
151 | AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN); | |
a381934e | 152 | if (ret < 0) |
f0fba2ad | 153 | return ret; |
a381934e DM |
154 | |
155 | /* enable transmitter */ | |
afad95f8 MB |
156 | ret = snd_soc_update_bits(codec, AK4104_REG_TX, |
157 | AK4104_TX_TXE, AK4104_TX_TXE); | |
a381934e | 158 | if (ret < 0) |
f0fba2ad | 159 | return ret; |
a381934e | 160 | |
a381934e | 161 | return 0; |
a381934e DM |
162 | } |
163 | ||
f0fba2ad | 164 | static int ak4104_remove(struct snd_soc_codec *codec) |
a381934e | 165 | { |
afad95f8 MB |
166 | snd_soc_update_bits(codec, AK4104_REG_CONTROL1, |
167 | AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0); | |
a381934e | 168 | |
afad95f8 | 169 | return 0; |
a381934e DM |
170 | } |
171 | ||
f0fba2ad LG |
172 | static struct snd_soc_codec_driver soc_codec_device_ak4104 = { |
173 | .probe = ak4104_probe, | |
174 | .remove = ak4104_remove, | |
2901d6eb MB |
175 | }; |
176 | ||
177 | static const struct regmap_config ak4104_regmap = { | |
178 | .reg_bits = 8, | |
179 | .val_bits = 8, | |
180 | ||
181 | .max_register = AK4104_NUM_REGS - 1, | |
182 | .read_flag_mask = AK4104_READ, | |
183 | .write_flag_mask = AK4104_WRITE, | |
184 | ||
185 | .cache_type = REGCACHE_RBTREE, | |
f0fba2ad LG |
186 | }; |
187 | ||
188 | static int ak4104_spi_probe(struct spi_device *spi) | |
a381934e | 189 | { |
f0fba2ad | 190 | struct ak4104_private *ak4104; |
2901d6eb | 191 | unsigned int val; |
a381934e DM |
192 | int ret; |
193 | ||
f0fba2ad LG |
194 | spi->bits_per_word = 8; |
195 | spi->mode = SPI_MODE_0; | |
196 | ret = spi_setup(spi); | |
197 | if (ret < 0) | |
a381934e | 198 | return ret; |
a381934e | 199 | |
3922d518 AL |
200 | ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private), |
201 | GFP_KERNEL); | |
f0fba2ad LG |
202 | if (ak4104 == NULL) |
203 | return -ENOMEM; | |
204 | ||
2901d6eb MB |
205 | ak4104->regmap = regmap_init_spi(spi, &ak4104_regmap); |
206 | if (IS_ERR(ak4104->regmap)) { | |
207 | ret = PTR_ERR(ak4104->regmap); | |
208 | return ret; | |
209 | } | |
210 | ||
211 | /* read the 'reserved' register - according to the datasheet, it | |
212 | * should contain 0x5b. Not a good way to verify the presence of | |
213 | * the device, but there is no hardware ID register. */ | |
214 | ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val); | |
215 | if (ret != 0) | |
216 | goto err; | |
217 | if (val != AK4104_RESERVED_VAL) { | |
218 | ret = -ENODEV; | |
219 | goto err; | |
220 | } | |
221 | ||
f0fba2ad LG |
222 | spi_set_drvdata(spi, ak4104); |
223 | ||
224 | ret = snd_soc_register_codec(&spi->dev, | |
225 | &soc_codec_device_ak4104, &ak4104_dai, 1); | |
2901d6eb MB |
226 | if (ret != 0) |
227 | goto err; | |
228 | ||
229 | return 0; | |
230 | ||
231 | err: | |
232 | regmap_exit(ak4104->regmap); | |
f0fba2ad | 233 | return ret; |
a381934e DM |
234 | } |
235 | ||
f0fba2ad | 236 | static int __devexit ak4104_spi_remove(struct spi_device *spi) |
a381934e | 237 | { |
2901d6eb MB |
238 | struct ak4104_private *ak4101 = spi_get_drvdata(spi); |
239 | regmap_exit(ak4101->regmap); | |
f0fba2ad | 240 | snd_soc_unregister_codec(&spi->dev); |
a381934e | 241 | return 0; |
f0fba2ad | 242 | } |
a381934e DM |
243 | |
244 | static struct spi_driver ak4104_spi_driver = { | |
245 | .driver = { | |
246 | .name = DRV_NAME, | |
247 | .owner = THIS_MODULE, | |
248 | }, | |
249 | .probe = ak4104_spi_probe, | |
250 | .remove = __devexit_p(ak4104_spi_remove), | |
251 | }; | |
252 | ||
38d78baf | 253 | module_spi_driver(ak4104_spi_driver); |
a381934e DM |
254 | |
255 | MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>"); | |
256 | MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver"); | |
257 | MODULE_LICENSE("GPL"); | |
258 |