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Linux/sound/soc/samsung/smdk_wm8994.c

  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 <sound/soc.h>
 13 #include <linux/module.h>
 14 #include <linux/of.h>
 15 #include <linux/of_device.h>
 16 
 17  /*
 18   * Default CFG switch settings to use this driver:
 19   *     SMDKV310: CFG5-1000, CFG7-111111
 20   */
 21 
 22  /*
 23   * Configure audio route as :-
 24   * $ amixer sset 'DAC1' on,on
 25   * $ amixer sset 'Right Headphone Mux' 'DAC'
 26   * $ amixer sset 'Left Headphone Mux' 'DAC'
 27   * $ amixer sset 'DAC1R Mixer AIF1.1' on
 28   * $ amixer sset 'DAC1L Mixer AIF1.1' on
 29   * $ amixer sset 'IN2L' on
 30   * $ amixer sset 'IN2L PGA IN2LN' on
 31   * $ amixer sset 'MIXINL IN2L' on
 32   * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
 33   * $ amixer sset 'IN2R' on
 34   * $ amixer sset 'IN2R PGA IN2RN' on
 35   * $ amixer sset 'MIXINR IN2R' on
 36   * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
 37   */
 38 
 39 /* SMDK has a 16.934MHZ crystal attached to WM8994 */
 40 #define SMDK_WM8994_FREQ 16934000
 41 
 42 struct smdk_wm8994_data {
 43         int mclk1_rate;
 44 };
 45 
 46 /* Default SMDKs */
 47 static struct smdk_wm8994_data smdk_board_data = {
 48         .mclk1_rate = SMDK_WM8994_FREQ,
 49 };
 50 
 51 static int smdk_hw_params(struct snd_pcm_substream *substream,
 52         struct snd_pcm_hw_params *params)
 53 {
 54         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 55         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 56         unsigned int pll_out;
 57         int ret;
 58 
 59         /* AIF1CLK should be >=3MHz for optimal performance */
 60         if (params_width(params) == 24)
 61                 pll_out = params_rate(params) * 384;
 62         else if (params_rate(params) == 8000 || params_rate(params) == 11025)
 63                 pll_out = params_rate(params) * 512;
 64         else
 65                 pll_out = params_rate(params) * 256;
 66 
 67         ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
 68                                         SMDK_WM8994_FREQ, pll_out);
 69         if (ret < 0)
 70                 return ret;
 71 
 72         ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
 73                                         pll_out, SND_SOC_CLOCK_IN);
 74         if (ret < 0)
 75                 return ret;
 76 
 77         return 0;
 78 }
 79 
 80 /*
 81  * SMDK WM8994 DAI operations.
 82  */
 83 static struct snd_soc_ops smdk_ops = {
 84         .hw_params = smdk_hw_params,
 85 };
 86 
 87 static int smdk_wm8994_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 88 {
 89         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
 90 
 91         /* Other pins NC */
 92         snd_soc_dapm_nc_pin(dapm, "HPOUT2P");
 93         snd_soc_dapm_nc_pin(dapm, "HPOUT2N");
 94         snd_soc_dapm_nc_pin(dapm, "SPKOUTLN");
 95         snd_soc_dapm_nc_pin(dapm, "SPKOUTLP");
 96         snd_soc_dapm_nc_pin(dapm, "SPKOUTRP");
 97         snd_soc_dapm_nc_pin(dapm, "SPKOUTRN");
 98         snd_soc_dapm_nc_pin(dapm, "LINEOUT1N");
 99         snd_soc_dapm_nc_pin(dapm, "LINEOUT1P");
100         snd_soc_dapm_nc_pin(dapm, "LINEOUT2N");
101         snd_soc_dapm_nc_pin(dapm, "LINEOUT2P");
102         snd_soc_dapm_nc_pin(dapm, "IN1LP");
103         snd_soc_dapm_nc_pin(dapm, "IN2LP:VXRN");
104         snd_soc_dapm_nc_pin(dapm, "IN1RP");
105         snd_soc_dapm_nc_pin(dapm, "IN2RP:VXRP");
106 
107         return 0;
108 }
109 
110 static struct snd_soc_dai_link smdk_dai[] = {
111         { /* Primary DAI i/f */
112                 .name = "WM8994 AIF1",
113                 .stream_name = "Pri_Dai",
114                 .cpu_dai_name = "samsung-i2s.0",
115                 .codec_dai_name = "wm8994-aif1",
116                 .platform_name = "samsung-i2s.0",
117                 .codec_name = "wm8994-codec",
118                 .init = smdk_wm8994_init_paiftx,
119                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
120                         SND_SOC_DAIFMT_CBM_CFM,
121                 .ops = &smdk_ops,
122         }, { /* Sec_Fifo Playback i/f */
123                 .name = "Sec_FIFO TX",
124                 .stream_name = "Sec_Dai",
125                 .cpu_dai_name = "samsung-i2s-sec",
126                 .codec_dai_name = "wm8994-aif1",
127                 .platform_name = "samsung-i2s-sec",
128                 .codec_name = "wm8994-codec",
129                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
130                         SND_SOC_DAIFMT_CBM_CFM,
131                 .ops = &smdk_ops,
132         },
133 };
134 
135 static struct snd_soc_card smdk = {
136         .name = "SMDK-I2S",
137         .owner = THIS_MODULE,
138         .dai_link = smdk_dai,
139         .num_links = ARRAY_SIZE(smdk_dai),
140 };
141 
142 static const struct of_device_id samsung_wm8994_of_match[] = {
143         { .compatible = "samsung,smdk-wm8994", .data = &smdk_board_data },
144         {},
145 };
146 MODULE_DEVICE_TABLE(of, samsung_wm8994_of_match);
147 
148 static int smdk_audio_probe(struct platform_device *pdev)
149 {
150         int ret;
151         struct device_node *np = pdev->dev.of_node;
152         struct snd_soc_card *card = &smdk;
153         struct smdk_wm8994_data *board;
154         const struct of_device_id *id;
155 
156         card->dev = &pdev->dev;
157 
158         board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL);
159         if (!board)
160                 return -ENOMEM;
161 
162         if (np) {
163                 smdk_dai[0].cpu_dai_name = NULL;
164                 smdk_dai[0].cpu_of_node = of_parse_phandle(np,
165                                 "samsung,i2s-controller", 0);
166                 if (!smdk_dai[0].cpu_of_node) {
167                         dev_err(&pdev->dev,
168                            "Property 'samsung,i2s-controller' missing or invalid\n");
169                         ret = -EINVAL;
170                 }
171 
172                 smdk_dai[0].platform_name = NULL;
173                 smdk_dai[0].platform_of_node = smdk_dai[0].cpu_of_node;
174         }
175 
176         id = of_match_device(of_match_ptr(samsung_wm8994_of_match), &pdev->dev);
177         if (id)
178                 *board = *((struct smdk_wm8994_data *)id->data);
179 
180         platform_set_drvdata(pdev, board);
181 
182         ret = devm_snd_soc_register_card(&pdev->dev, card);
183 
184         if (ret)
185                 dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);
186 
187         return ret;
188 }
189 
190 static struct platform_driver smdk_audio_driver = {
191         .driver         = {
192                 .name   = "smdk-audio-wm8994",
193                 .of_match_table = of_match_ptr(samsung_wm8994_of_match),
194                 .pm     = &snd_soc_pm_ops,
195         },
196         .probe          = smdk_audio_probe,
197 };
198 
199 module_platform_driver(smdk_audio_driver);
200 
201 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994");
202 MODULE_LICENSE("GPL");
203 MODULE_ALIAS("platform:smdk-audio-wm8994");
204 

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