Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
smdk_wm8994.c
Go to the documentation of this file.
1 /*
2  * smdk_wm8994.c
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License as published by the
6  * Free Software Foundation; either version 2 of the License, or (at your
7  * option) any later version.
8  */
9 
10 #include "../codecs/wm8994.h"
11 #include <sound/pcm_params.h>
12 #include <linux/module.h>
13 
14  /*
15  * Default CFG switch settings to use this driver:
16  * SMDKV310: CFG5-1000, CFG7-111111
17  */
18 
19  /*
20  * Configure audio route as :-
21  * $ amixer sset 'DAC1' on,on
22  * $ amixer sset 'Right Headphone Mux' 'DAC'
23  * $ amixer sset 'Left Headphone Mux' 'DAC'
24  * $ amixer sset 'DAC1R Mixer AIF1.1' on
25  * $ amixer sset 'DAC1L Mixer AIF1.1' on
26  * $ amixer sset 'IN2L' on
27  * $ amixer sset 'IN2L PGA IN2LN' on
28  * $ amixer sset 'MIXINL IN2L' on
29  * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
30  * $ amixer sset 'IN2R' on
31  * $ amixer sset 'IN2R PGA IN2RN' on
32  * $ amixer sset 'MIXINR IN2R' on
33  * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
34  */
35 
36 /* SMDK has a 16.934MHZ crystal attached to WM8994 */
37 #define SMDK_WM8994_FREQ 16934000
38 
39 static int smdk_hw_params(struct snd_pcm_substream *substream,
40  struct snd_pcm_hw_params *params)
41 {
42  struct snd_soc_pcm_runtime *rtd = substream->private_data;
43  struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
44  struct snd_soc_dai *codec_dai = rtd->codec_dai;
45  unsigned int pll_out;
46  int ret;
47 
48  /* AIF1CLK should be >=3MHz for optimal performance */
49  if (params_format(params) == SNDRV_PCM_FORMAT_S24_LE)
50  pll_out = params_rate(params) * 384;
51  else if (params_rate(params) == 8000 || params_rate(params) == 11025)
52  pll_out = params_rate(params) * 512;
53  else
54  pll_out = params_rate(params) * 256;
55 
56  ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
57  | SND_SOC_DAIFMT_NB_NF
58  | SND_SOC_DAIFMT_CBM_CFM);
59  if (ret < 0)
60  return ret;
61 
62  ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
63  | SND_SOC_DAIFMT_NB_NF
64  | SND_SOC_DAIFMT_CBM_CFM);
65  if (ret < 0)
66  return ret;
67 
68  ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
69  SMDK_WM8994_FREQ, pll_out);
70  if (ret < 0)
71  return ret;
72 
73  ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
74  pll_out, SND_SOC_CLOCK_IN);
75  if (ret < 0)
76  return ret;
77 
78  return 0;
79 }
80 
81 /*
82  * SMDK WM8994 DAI operations.
83  */
84 static struct snd_soc_ops smdk_ops = {
85  .hw_params = smdk_hw_params,
86 };
87 
88 static int smdk_wm8994_init_paiftx(struct snd_soc_pcm_runtime *rtd)
89 {
90  struct snd_soc_codec *codec = rtd->codec;
91  struct snd_soc_dapm_context *dapm = &codec->dapm;
92 
93  /* HeadPhone */
94  snd_soc_dapm_enable_pin(dapm, "HPOUT1R");
95  snd_soc_dapm_enable_pin(dapm, "HPOUT1L");
96 
97  /* MicIn */
98  snd_soc_dapm_enable_pin(dapm, "IN1LN");
99  snd_soc_dapm_enable_pin(dapm, "IN1RN");
100 
101  /* LineIn */
102  snd_soc_dapm_enable_pin(dapm, "IN2LN");
103  snd_soc_dapm_enable_pin(dapm, "IN2RN");
104 
105  /* Other pins NC */
106  snd_soc_dapm_nc_pin(dapm, "HPOUT2P");
107  snd_soc_dapm_nc_pin(dapm, "HPOUT2N");
108  snd_soc_dapm_nc_pin(dapm, "SPKOUTLN");
109  snd_soc_dapm_nc_pin(dapm, "SPKOUTLP");
110  snd_soc_dapm_nc_pin(dapm, "SPKOUTRP");
111  snd_soc_dapm_nc_pin(dapm, "SPKOUTRN");
112  snd_soc_dapm_nc_pin(dapm, "LINEOUT1N");
113  snd_soc_dapm_nc_pin(dapm, "LINEOUT1P");
114  snd_soc_dapm_nc_pin(dapm, "LINEOUT2N");
115  snd_soc_dapm_nc_pin(dapm, "LINEOUT2P");
116  snd_soc_dapm_nc_pin(dapm, "IN1LP");
117  snd_soc_dapm_nc_pin(dapm, "IN2LP:VXRN");
118  snd_soc_dapm_nc_pin(dapm, "IN1RP");
119  snd_soc_dapm_nc_pin(dapm, "IN2RP:VXRP");
120 
121  return 0;
122 }
123 
124 static struct snd_soc_dai_link smdk_dai[] = {
125  { /* Primary DAI i/f */
126  .name = "WM8994 AIF1",
127  .stream_name = "Pri_Dai",
128  .cpu_dai_name = "samsung-i2s.0",
129  .codec_dai_name = "wm8994-aif1",
130  .platform_name = "samsung-audio",
131  .codec_name = "wm8994-codec",
132  .init = smdk_wm8994_init_paiftx,
133  .ops = &smdk_ops,
134  }, { /* Sec_Fifo Playback i/f */
135  .name = "Sec_FIFO TX",
136  .stream_name = "Sec_Dai",
137  .cpu_dai_name = "samsung-i2s.4",
138  .codec_dai_name = "wm8994-aif1",
139  .platform_name = "samsung-audio",
140  .codec_name = "wm8994-codec",
141  .ops = &smdk_ops,
142  },
143 };
144 
145 static struct snd_soc_card smdk = {
146  .name = "SMDK-I2S",
147  .owner = THIS_MODULE,
148  .dai_link = smdk_dai,
149  .num_links = ARRAY_SIZE(smdk_dai),
150 };
151 
152 
153 static int __devinit smdk_audio_probe(struct platform_device *pdev)
154 {
155  int ret;
156  struct snd_soc_card *card = &smdk;
157 
158  card->dev = &pdev->dev;
159  ret = snd_soc_register_card(card);
160 
161  if (ret)
162  dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);
163 
164  return ret;
165 }
166 
167 static int __devexit smdk_audio_remove(struct platform_device *pdev)
168 {
169  struct snd_soc_card *card = platform_get_drvdata(pdev);
170 
171  snd_soc_unregister_card(card);
172 
173  return 0;
174 }
175 
176 static struct platform_driver smdk_audio_driver = {
177  .driver = {
178  .name = "smdk-audio",
179  .owner = THIS_MODULE,
180  },
181  .probe = smdk_audio_probe,
182  .remove = __devexit_p(smdk_audio_remove),
183 };
184 
185 module_platform_driver(smdk_audio_driver);
186 
187 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994");
188 MODULE_LICENSE("GPL");
189 MODULE_ALIAS("platform:smdk-audio");
Generated on Thu Jan 10 2013 15:08:25 for Linux Kernel by   doxygen 1.8.2