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s6105-ipcam.c
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1 /*
2  * ASoC driver for Stretch s6105 IP camera platform
3  *
4  * Author: Daniel Gloeckner, <[email protected]>
5  * Copyright: (C) 2009 emlix GmbH <[email protected]>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11 
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/timer.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/i2c.h>
18 #include <sound/core.h>
19 #include <sound/pcm.h>
20 #include <sound/soc.h>
21 
22 #include <variant/dmac.h>
23 
24 #include "s6000-pcm.h"
25 #include "s6000-i2s.h"
26 
27 #define S6105_CAM_CODEC_CLOCK 12288000
28 
29 static int s6105_hw_params(struct snd_pcm_substream *substream,
30  struct snd_pcm_hw_params *params)
31 {
32  struct snd_soc_pcm_runtime *rtd = substream->private_data;
33  struct snd_soc_dai *codec_dai = rtd->codec_dai;
34  struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
35  int ret = 0;
36 
37  /* set codec DAI configuration */
38  ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
40  if (ret < 0)
41  return ret;
42 
43  /* set cpu DAI configuration */
46  if (ret < 0)
47  return ret;
48 
49  /* set the codec system clock */
52  if (ret < 0)
53  return ret;
54 
55  return 0;
56 }
57 
58 static struct snd_soc_ops s6105_ops = {
59  .hw_params = s6105_hw_params,
60 };
61 
62 /* s6105 machine dapm widgets */
63 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
64  SND_SOC_DAPM_LINE("Audio Out Differential", NULL),
65  SND_SOC_DAPM_LINE("Audio Out Stereo", NULL),
66  SND_SOC_DAPM_LINE("Audio In", NULL),
67 };
68 
69 /* s6105 machine audio_mapnections to the codec pins */
70 static const struct snd_soc_dapm_route audio_map[] = {
71  /* Audio Out connected to HPLOUT, HPLCOM, HPROUT */
72  {"Audio Out Differential", NULL, "HPLOUT"},
73  {"Audio Out Differential", NULL, "HPLCOM"},
74  {"Audio Out Stereo", NULL, "HPLOUT"},
75  {"Audio Out Stereo", NULL, "HPROUT"},
76 
77  /* Audio In connected to LINE1L, LINE1R */
78  {"LINE1L", NULL, "Audio In"},
79  {"LINE1R", NULL, "Audio In"},
80 };
81 
82 static int output_type_info(struct snd_kcontrol *kcontrol,
83  struct snd_ctl_elem_info *uinfo)
84 {
86  uinfo->count = 1;
87  uinfo->value.enumerated.items = 2;
88  if (uinfo->value.enumerated.item) {
89  uinfo->value.enumerated.item = 1;
90  strcpy(uinfo->value.enumerated.name, "HPLOUT/HPROUT");
91  } else {
92  strcpy(uinfo->value.enumerated.name, "HPLOUT/HPLCOM");
93  }
94  return 0;
95 }
96 
97 static int output_type_get(struct snd_kcontrol *kcontrol,
98  struct snd_ctl_elem_value *ucontrol)
99 {
100  ucontrol->value.enumerated.item[0] = kcontrol->private_value;
101  return 0;
102 }
103 
104 static int output_type_put(struct snd_kcontrol *kcontrol,
105  struct snd_ctl_elem_value *ucontrol)
106 {
107  struct snd_soc_codec *codec = kcontrol->private_data;
108  struct snd_soc_dapm_context *dapm = &codec->dapm;
109  unsigned int val = (ucontrol->value.enumerated.item[0] != 0);
110  char *differential = "Audio Out Differential";
111  char *stereo = "Audio Out Stereo";
112 
113  if (kcontrol->private_value == val)
114  return 0;
115  kcontrol->private_value = val;
116  snd_soc_dapm_disable_pin(dapm, val ? differential : stereo);
117  snd_soc_dapm_sync(dapm);
118  snd_soc_dapm_enable_pin(dapm, val ? stereo : differential);
119  snd_soc_dapm_sync(dapm);
120 
121  return 1;
122 }
123 
124 static const struct snd_kcontrol_new audio_out_mux = {
126  .name = "Master Output Mux",
127  .index = 0,
129  .info = output_type_info,
130  .get = output_type_get,
131  .put = output_type_put,
132  .private_value = 1 /* default to stereo */
133 };
134 
135 /* Logic for a aic3x as connected on the s6105 ip camera ref design */
136 static int s6105_aic3x_init(struct snd_soc_pcm_runtime *rtd)
137 {
138  struct snd_soc_codec *codec = rtd->codec;
139  struct snd_soc_dapm_context *dapm = &codec->dapm;
140 
141  /* Add s6105 specific widgets */
142  snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets,
143  ARRAY_SIZE(aic3x_dapm_widgets));
144 
145  /* Set up s6105 specific audio path audio_map */
146  snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
147 
148  /* not present */
149  snd_soc_dapm_nc_pin(dapm, "MONO_LOUT");
150  snd_soc_dapm_nc_pin(dapm, "LINE2L");
151  snd_soc_dapm_nc_pin(dapm, "LINE2R");
152 
153  /* not connected */
154  snd_soc_dapm_nc_pin(dapm, "MIC3L"); /* LINE2L on this chip */
155  snd_soc_dapm_nc_pin(dapm, "MIC3R"); /* LINE2R on this chip */
156  snd_soc_dapm_nc_pin(dapm, "LLOUT");
157  snd_soc_dapm_nc_pin(dapm, "RLOUT");
158  snd_soc_dapm_nc_pin(dapm, "HPRCOM");
159 
160  /* always connected */
161  snd_soc_dapm_enable_pin(dapm, "Audio In");
162 
163  /* must correspond to audio_out_mux.private_value initializer */
164  snd_soc_dapm_disable_pin(dapm, "Audio Out Differential");
165  snd_soc_dapm_sync(dapm);
166  snd_soc_dapm_enable_pin(dapm, "Audio Out Stereo");
167 
168  snd_soc_dapm_sync(dapm);
169 
170  snd_ctl_add(codec->card->snd_card, snd_ctl_new1(&audio_out_mux, codec));
171 
172  return 0;
173 }
174 
175 /* s6105 digital audio interface glue - connects codec <--> CPU */
176 static struct snd_soc_dai_link s6105_dai = {
177  .name = "TLV320AIC31",
178  .stream_name = "AIC31",
179  .cpu_dai_name = "s6000-i2s",
180  .codec_dai_name = "tlv320aic3x-hifi",
181  .platform_name = "s6000-pcm-audio",
182  .codec_name = "tlv320aic3x-codec.0-001a",
183  .init = s6105_aic3x_init,
184  .ops = &s6105_ops,
185 };
186 
187 /* s6105 audio machine driver */
188 static struct snd_soc_card snd_soc_card_s6105 = {
189  .name = "Stretch IP Camera",
190  .owner = THIS_MODULE,
191  .dai_link = &s6105_dai,
192  .num_links = 1,
193 };
194 
195 static struct s6000_snd_platform_data __initdata s6105_snd_data = {
196  .wide = 0,
197  .channel_in = 0,
198  .channel_out = 1,
199  .lines_in = 1,
200  .lines_out = 1,
201  .same_rate = 1,
202 };
203 
204 static struct platform_device *s6105_snd_device;
205 
206 /* temporary i2c device creation until this can be moved into the machine
207  * support file.
208 */
209 static struct i2c_board_info i2c_device[] = {
210  { I2C_BOARD_INFO("tlv320aic33", 0x18), }
211 };
212 
213 static int __init s6105_init(void)
214 {
215  int ret;
216 
217  i2c_register_board_info(0, i2c_device, ARRAY_SIZE(i2c_device));
218 
219  s6105_snd_device = platform_device_alloc("soc-audio", -1);
220  if (!s6105_snd_device)
221  return -ENOMEM;
222 
223  platform_set_drvdata(s6105_snd_device, &snd_soc_card_s6105);
224  platform_device_add_data(s6105_snd_device, &s6105_snd_data,
225  sizeof(s6105_snd_data));
226 
227  ret = platform_device_add(s6105_snd_device);
228  if (ret)
229  platform_device_put(s6105_snd_device);
230 
231  return ret;
232 }
233 
234 static void __exit s6105_exit(void)
235 {
236  platform_device_unregister(s6105_snd_device);
237 }
238 
239 module_init(s6105_init);
240 module_exit(s6105_exit);
241 
242 MODULE_AUTHOR("Daniel Gloeckner");
243 MODULE_DESCRIPTION("Stretch s6105 IP camera ASoC driver");
244 MODULE_LICENSE("GPL");