2 * ASoC driver for Stretch s6105 IP camera platform
4 * Author: Daniel Gloeckner, <dg@emlix.com>
5 * Copyright: (C) 2009 emlix GmbH <info@emlix.com>
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.
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>
22 #include "s6000-pcm.h"
23 #include "s6000-i2s.h"
25 #define S6105_CAM_CODEC_CLOCK 12288000
27 static int s6105_hw_params(struct snd_pcm_substream *substream,
28 struct snd_pcm_hw_params *params)
30 struct snd_soc_pcm_runtime *rtd = substream->private_data;
31 struct snd_soc_dai *codec_dai = rtd->codec_dai;
32 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
35 /* set codec DAI configuration */
36 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
37 SND_SOC_DAIFMT_CBM_CFM);
41 /* set cpu DAI configuration */
42 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
43 SND_SOC_DAIFMT_NB_NF);
47 /* set the codec system clock */
48 ret = snd_soc_dai_set_sysclk(codec_dai, 0, S6105_CAM_CODEC_CLOCK,
56 static struct snd_soc_ops s6105_ops = {
57 .hw_params = s6105_hw_params,
60 /* s6105 machine dapm widgets */
61 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
62 SND_SOC_DAPM_LINE("Audio Out Differential", NULL),
63 SND_SOC_DAPM_LINE("Audio Out Stereo", NULL),
64 SND_SOC_DAPM_LINE("Audio In", NULL),
67 /* s6105 machine audio_mapnections to the codec pins */
68 static const struct snd_soc_dapm_route audio_map[] = {
69 /* Audio Out connected to HPLOUT, HPLCOM, HPROUT */
70 {"Audio Out Differential", NULL, "HPLOUT"},
71 {"Audio Out Differential", NULL, "HPLCOM"},
72 {"Audio Out Stereo", NULL, "HPLOUT"},
73 {"Audio Out Stereo", NULL, "HPROUT"},
75 /* Audio In connected to LINE1L, LINE1R */
76 {"LINE1L", NULL, "Audio In"},
77 {"LINE1R", NULL, "Audio In"},
80 static int output_type_info(struct snd_kcontrol *kcontrol,
81 struct snd_ctl_elem_info *uinfo)
83 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
85 uinfo->value.enumerated.items = 2;
86 if (uinfo->value.enumerated.item) {
87 uinfo->value.enumerated.item = 1;
88 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPROUT");
90 strcpy(uinfo->value.enumerated.name, "HPLOUT/HPLCOM");
95 static int output_type_get(struct snd_kcontrol *kcontrol,
96 struct snd_ctl_elem_value *ucontrol)
98 ucontrol->value.enumerated.item[0] = kcontrol->private_value;
102 static int output_type_put(struct snd_kcontrol *kcontrol,
103 struct snd_ctl_elem_value *ucontrol)
105 struct snd_soc_card *card = kcontrol->private_data;
106 struct snd_soc_dapm_context *dapm = &card->dapm;
107 unsigned int val = (ucontrol->value.enumerated.item[0] != 0);
108 char *differential = "Audio Out Differential";
109 char *stereo = "Audio Out Stereo";
111 if (kcontrol->private_value == val)
113 kcontrol->private_value = val;
114 snd_soc_dapm_disable_pin(dapm, val ? differential : stereo);
115 snd_soc_dapm_sync(dapm);
116 snd_soc_dapm_enable_pin(dapm, val ? stereo : differential);
117 snd_soc_dapm_sync(dapm);
122 static const struct snd_kcontrol_new audio_out_mux = {
123 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
124 .name = "Master Output Mux",
126 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
127 .info = output_type_info,
128 .get = output_type_get,
129 .put = output_type_put,
130 .private_value = 1 /* default to stereo */
133 /* Logic for a aic3x as connected on the s6105 ip camera ref design */
134 static int s6105_aic3x_init(struct snd_soc_pcm_runtime *rtd)
136 struct snd_soc_card *card = rtd->card;
138 /* must correspond to audio_out_mux.private_value initializer */
139 snd_soc_dapm_disable_pin(&card->dapm, "Audio Out Differential");
141 snd_ctl_add(card->snd_card, snd_ctl_new1(&audio_out_mux, card));
146 /* s6105 digital audio interface glue - connects codec <--> CPU */
147 static struct snd_soc_dai_link s6105_dai = {
148 .name = "TLV320AIC31",
149 .stream_name = "AIC31",
150 .cpu_dai_name = "s6000-i2s",
151 .codec_dai_name = "tlv320aic3x-hifi",
152 .platform_name = "s6000-pcm-audio",
153 .codec_name = "tlv320aic3x-codec.0-001a",
154 .init = s6105_aic3x_init,
158 /* s6105 audio machine driver */
159 static struct snd_soc_card snd_soc_card_s6105 = {
160 .name = "Stretch IP Camera",
161 .owner = THIS_MODULE,
162 .dai_link = &s6105_dai,
165 .dapm_widgets = aic3x_dapm_widgets,
166 .num_dapm_widgets = ARRAY_SIZE(aic3x_dapm_widgets),
167 .dapm_routes = audio_map,
168 .num_dapm_routes = ARRAY_SIZE(audio_map),
169 .fully_routed = true,
172 static struct s6000_snd_platform_data s6105_snd_data __initdata = {
181 static struct platform_device *s6105_snd_device;
183 /* temporary i2c device creation until this can be moved into the machine
186 static struct i2c_board_info i2c_device[] = {
187 { I2C_BOARD_INFO("tlv320aic33", 0x18), }
190 static int __init s6105_init(void)
194 i2c_register_board_info(0, i2c_device, ARRAY_SIZE(i2c_device));
196 s6105_snd_device = platform_device_alloc("soc-audio", -1);
197 if (!s6105_snd_device)
200 platform_set_drvdata(s6105_snd_device, &snd_soc_card_s6105);
201 platform_device_add_data(s6105_snd_device, &s6105_snd_data,
202 sizeof(s6105_snd_data));
204 ret = platform_device_add(s6105_snd_device);
206 platform_device_put(s6105_snd_device);
211 static void __exit s6105_exit(void)
213 platform_device_unregister(s6105_snd_device);
216 module_init(s6105_init);
217 module_exit(s6105_exit);
219 MODULE_AUTHOR("Daniel Gloeckner");
220 MODULE_DESCRIPTION("Stretch s6105 IP camera ASoC driver");
221 MODULE_LICENSE("GPL");