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1 | /* |
2 | * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms | |
3 | * | |
4 | * Copyright (C) 2010 Texas Instruments, Inc | |
5 | * | |
6 | * Author: Miguel Aguilar <miguel.aguilar@ridgerun.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 as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | #include <linux/module.h> | |
23 | #include <linux/moduleparam.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/io.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/pm.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/device.h> | |
30 | #include <linux/clk.h> | |
31 | #include <linux/mfd/davinci_voicecodec.h> | |
32 | ||
33 | #include <sound/core.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/soc.h> | |
37 | #include <sound/soc-dai.h> | |
38 | #include <sound/soc-dapm.h> | |
39 | #include <sound/initval.h> | |
40 | ||
41 | #include <mach/dm365.h> | |
42 | ||
43 | #include "cq93vc.h" | |
44 | ||
45 | static inline unsigned int cq93vc_read(struct snd_soc_codec *codec, | |
46 | unsigned int reg) | |
47 | { | |
48 | struct davinci_vc *davinci_vc = codec->control_data; | |
49 | ||
50 | return readl(davinci_vc->base + reg); | |
51 | } | |
52 | ||
53 | static inline int cq93vc_write(struct snd_soc_codec *codec, unsigned int reg, | |
54 | unsigned int value) | |
55 | { | |
56 | struct davinci_vc *davinci_vc = codec->control_data; | |
57 | ||
58 | writel(value, davinci_vc->base + reg); | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | static const struct snd_kcontrol_new cq93vc_snd_controls[] = { | |
64 | SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0), | |
65 | SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0), | |
66 | }; | |
67 | ||
68 | static int cq93vc_mute(struct snd_soc_dai *dai, int mute) | |
69 | { | |
70 | struct snd_soc_codec *codec = dai->codec; | |
71 | u8 reg = cq93vc_read(codec, DAVINCI_VC_REG09) & ~DAVINCI_VC_REG09_MUTE; | |
72 | ||
73 | if (mute) | |
74 | cq93vc_write(codec, DAVINCI_VC_REG09, | |
75 | reg | DAVINCI_VC_REG09_MUTE); | |
76 | else | |
77 | cq93vc_write(codec, DAVINCI_VC_REG09, reg); | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
82 | static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
83 | int clk_id, unsigned int freq, int dir) | |
84 | { | |
85 | struct snd_soc_codec *codec = codec_dai->codec; | |
86 | struct davinci_vc *davinci_vc = codec->control_data; | |
87 | ||
88 | switch (freq) { | |
89 | case 22579200: | |
90 | case 27000000: | |
91 | case 33868800: | |
92 | davinci_vc->cq93vc.sysclk = freq; | |
93 | return 0; | |
94 | } | |
95 | ||
96 | return -EINVAL; | |
97 | } | |
98 | ||
99 | static int cq93vc_set_bias_level(struct snd_soc_codec *codec, | |
100 | enum snd_soc_bias_level level) | |
101 | { | |
102 | switch (level) { | |
103 | case SND_SOC_BIAS_ON: | |
104 | cq93vc_write(codec, DAVINCI_VC_REG12, | |
105 | DAVINCI_VC_REG12_POWER_ALL_ON); | |
106 | break; | |
107 | case SND_SOC_BIAS_PREPARE: | |
108 | break; | |
109 | case SND_SOC_BIAS_STANDBY: | |
110 | cq93vc_write(codec, DAVINCI_VC_REG12, | |
111 | DAVINCI_VC_REG12_POWER_ALL_OFF); | |
112 | break; | |
113 | case SND_SOC_BIAS_OFF: | |
114 | /* force all power off */ | |
115 | cq93vc_write(codec, DAVINCI_VC_REG12, | |
116 | DAVINCI_VC_REG12_POWER_ALL_OFF); | |
117 | break; | |
118 | } | |
119 | codec->bias_level = level; | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | #define CQ93VC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000) | |
125 | #define CQ93VC_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) | |
126 | ||
127 | static struct snd_soc_dai_ops cq93vc_dai_ops = { | |
128 | .digital_mute = cq93vc_mute, | |
129 | .set_sysclk = cq93vc_set_dai_sysclk, | |
130 | }; | |
131 | ||
132 | struct snd_soc_dai cq93vc_dai = { | |
133 | .name = "CQ93VC", | |
134 | .playback = { | |
135 | .stream_name = "Playback", | |
136 | .channels_min = 1, | |
137 | .channels_max = 2, | |
138 | .rates = CQ93VC_RATES, | |
139 | .formats = CQ93VC_FORMATS,}, | |
140 | .capture = { | |
141 | .stream_name = "Capture", | |
142 | .channels_min = 1, | |
143 | .channels_max = 2, | |
144 | .rates = CQ93VC_RATES, | |
145 | .formats = CQ93VC_FORMATS,}, | |
146 | .ops = &cq93vc_dai_ops, | |
147 | }; | |
148 | EXPORT_SYMBOL_GPL(cq93vc_dai); | |
149 | ||
150 | static int cq93vc_resume(struct platform_device *pdev) | |
151 | { | |
152 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
153 | struct snd_soc_codec *codec = socdev->card->codec; | |
154 | ||
155 | cq93vc_set_bias_level(codec, codec->suspend_bias_level); | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static struct snd_soc_codec *cq93vc_codec; | |
161 | ||
162 | static int cq93vc_probe(struct platform_device *pdev) | |
163 | { | |
164 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
165 | struct device *dev = &pdev->dev; | |
166 | struct snd_soc_codec *codec; | |
167 | int ret; | |
168 | ||
169 | socdev->card->codec = cq93vc_codec; | |
170 | codec = socdev->card->codec; | |
171 | ||
172 | /* Register pcms */ | |
173 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
174 | if (ret < 0) { | |
175 | dev_err(dev, "%s: failed to create pcms\n", pdev->name); | |
176 | return ret; | |
177 | } | |
178 | ||
179 | /* Set controls */ | |
180 | snd_soc_add_controls(codec, cq93vc_snd_controls, | |
181 | ARRAY_SIZE(cq93vc_snd_controls)); | |
182 | ||
183 | /* Off, with power on */ | |
184 | cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | static int cq93vc_remove(struct platform_device *pdev) | |
190 | { | |
191 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
192 | ||
193 | snd_soc_free_pcms(socdev); | |
194 | snd_soc_dapm_free(socdev); | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | struct snd_soc_codec_device soc_codec_dev_cq93vc = { | |
200 | .probe = cq93vc_probe, | |
201 | .remove = cq93vc_remove, | |
202 | .resume = cq93vc_resume, | |
203 | }; | |
204 | EXPORT_SYMBOL_GPL(soc_codec_dev_cq93vc); | |
205 | ||
206 | static __init int cq93vc_codec_probe(struct platform_device *pdev) | |
207 | { | |
208 | struct davinci_vc *davinci_vc = platform_get_drvdata(pdev); | |
209 | struct snd_soc_codec *codec; | |
210 | int ret; | |
211 | ||
212 | codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
213 | if (codec == NULL) { | |
214 | dev_dbg(davinci_vc->dev, | |
215 | "could not allocate memory for codec data\n"); | |
216 | return -ENOMEM; | |
217 | } | |
218 | ||
219 | davinci_vc->cq93vc.codec = codec; | |
220 | ||
221 | cq93vc_dai.dev = &pdev->dev; | |
222 | ||
223 | mutex_init(&codec->mutex); | |
224 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
225 | INIT_LIST_HEAD(&codec->dapm_paths); | |
226 | codec->dev = &pdev->dev; | |
227 | codec->name = "CQ93VC"; | |
228 | codec->owner = THIS_MODULE; | |
229 | codec->read = cq93vc_read; | |
230 | codec->write = cq93vc_write; | |
231 | codec->set_bias_level = cq93vc_set_bias_level; | |
232 | codec->dai = &cq93vc_dai; | |
233 | codec->num_dai = 1; | |
234 | codec->control_data = davinci_vc; | |
235 | ||
236 | cq93vc_codec = codec; | |
237 | ||
238 | ret = snd_soc_register_codec(codec); | |
239 | if (ret) { | |
240 | dev_err(davinci_vc->dev, "failed to register codec\n"); | |
241 | goto fail1; | |
242 | } | |
243 | ||
244 | ret = snd_soc_register_dai(&cq93vc_dai); | |
245 | if (ret) { | |
246 | dev_err(davinci_vc->dev, "could register dai\n"); | |
247 | goto fail2; | |
248 | } | |
249 | return 0; | |
250 | ||
251 | fail2: | |
252 | snd_soc_unregister_codec(codec); | |
253 | ||
254 | fail1: | |
255 | kfree(codec); | |
256 | cq93vc_codec = NULL; | |
257 | ||
258 | return ret; | |
259 | } | |
260 | ||
261 | static int __devexit cq93vc_codec_remove(struct platform_device *pdev) | |
262 | { | |
263 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
264 | struct snd_soc_codec *codec = socdev->card->codec; | |
265 | ||
266 | snd_soc_unregister_dai(&cq93vc_dai); | |
267 | snd_soc_unregister_codec(&codec); | |
268 | ||
269 | kfree(codec); | |
270 | cq93vc_codec = NULL; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static struct platform_driver cq93vc_codec_driver = { | |
276 | .driver = { | |
277 | .name = "cq93vc", | |
278 | .owner = THIS_MODULE, | |
279 | }, | |
280 | .probe = cq93vc_codec_probe, | |
281 | .remove = __devexit_p(cq93vc_codec_remove), | |
282 | }; | |
283 | ||
284 | static __init int cq93vc_init(void) | |
285 | { | |
286 | return platform_driver_probe(&cq93vc_codec_driver, cq93vc_codec_probe); | |
287 | } | |
288 | module_init(cq93vc_init); | |
289 | ||
290 | static __exit void cq93vc_exit(void) | |
291 | { | |
292 | platform_driver_unregister(&cq93vc_codec_driver); | |
293 | } | |
294 | module_exit(cq93vc_exit); | |
295 | ||
296 | MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver"); | |
297 | MODULE_AUTHOR("Miguel Aguilar"); | |
298 | MODULE_LICENSE("GPL"); |