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Linux/sound/soc/samsung/smdk_wm8580.c

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  1 /*
  2  *  smdk_wm8580.c
  3  *
  4  *  Copyright (c) 2009 Samsung Electronics Co. Ltd
  5  *  Author: Jaswinder Singh <jassisinghbrar@gmail.com>
  6  *
  7  *  This program is free software; you can redistribute  it and/or modify it
  8  *  under  the terms of  the GNU General  Public License as published by the
  9  *  Free Software Foundation;  either version 2 of the  License, or (at your
 10  *  option) any later version.
 11  */
 12 
 13 #include <linux/module.h>
 14 #include <sound/soc.h>
 15 #include <sound/pcm_params.h>
 16 
 17 #include <asm/mach-types.h>
 18 
 19 #include "../codecs/wm8580.h"
 20 #include "i2s.h"
 21 
 22 /*
 23  * Default CFG switch settings to use this driver:
 24  *
 25  *   SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
 26  */
 27 
 28 /* SMDK has a 12MHZ crystal attached to WM8580 */
 29 #define SMDK_WM8580_FREQ 12000000
 30 
 31 static int smdk_hw_params(struct snd_pcm_substream *substream,
 32         struct snd_pcm_hw_params *params)
 33 {
 34         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 35         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 36         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 37         unsigned int pll_out;
 38         int bfs, rfs, ret;
 39 
 40         switch (params_format(params)) {
 41         case SNDRV_PCM_FORMAT_U8:
 42         case SNDRV_PCM_FORMAT_S8:
 43                 bfs = 16;
 44                 break;
 45         case SNDRV_PCM_FORMAT_U16_LE:
 46         case SNDRV_PCM_FORMAT_S16_LE:
 47                 bfs = 32;
 48                 break;
 49         default:
 50                 return -EINVAL;
 51         }
 52 
 53         /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
 54          * This criterion can't be met if we request PLL output
 55          * as {8000x256, 64000x256, 11025x256}Hz.
 56          * As a wayout, we rather change rfs to a minimum value that
 57          * results in (params_rate(params) * rfs), and itself, acceptable
 58          * to both - the CODEC and the CPU.
 59          */
 60         switch (params_rate(params)) {
 61         case 16000:
 62         case 22050:
 63         case 32000:
 64         case 44100:
 65         case 48000:
 66         case 88200:
 67         case 96000:
 68                 rfs = 256;
 69                 break;
 70         case 64000:
 71                 rfs = 384;
 72                 break;
 73         case 8000:
 74         case 11025:
 75                 rfs = 512;
 76                 break;
 77         default:
 78                 return -EINVAL;
 79         }
 80         pll_out = params_rate(params) * rfs;
 81 
 82         /* Set the Codec DAI configuration */
 83         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
 84                                          | SND_SOC_DAIFMT_NB_NF
 85                                          | SND_SOC_DAIFMT_CBM_CFM);
 86         if (ret < 0)
 87                 return ret;
 88 
 89         /* Set the AP DAI configuration */
 90         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
 91                                          | SND_SOC_DAIFMT_NB_NF
 92                                          | SND_SOC_DAIFMT_CBM_CFM);
 93         if (ret < 0)
 94                 return ret;
 95 
 96         /* Set WM8580 to drive MCLK from its PLLA */
 97         ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
 98                                         WM8580_CLKSRC_PLLA);
 99         if (ret < 0)
100                 return ret;
101 
102         ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
103                                         SMDK_WM8580_FREQ, pll_out);
104         if (ret < 0)
105                 return ret;
106 
107         ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
108                                      pll_out, SND_SOC_CLOCK_IN);
109         if (ret < 0)
110                 return ret;
111 
112         return 0;
113 }
114 
115 /*
116  * SMDK WM8580 DAI operations.
117  */
118 static struct snd_soc_ops smdk_ops = {
119         .hw_params = smdk_hw_params,
120 };
121 
122 /* SMDK Playback widgets */
123 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
124         SND_SOC_DAPM_HP("Front", NULL),
125         SND_SOC_DAPM_HP("Center+Sub", NULL),
126         SND_SOC_DAPM_HP("Rear", NULL),
127 
128         SND_SOC_DAPM_MIC("MicIn", NULL),
129         SND_SOC_DAPM_LINE("LineIn", NULL),
130 };
131 
132 /* SMDK-PAIFTX connections */
133 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
134         /* MicIn feeds AINL */
135         {"AINL", NULL, "MicIn"},
136 
137         /* LineIn feeds AINL/R */
138         {"AINL", NULL, "LineIn"},
139         {"AINR", NULL, "LineIn"},
140 
141         /* Front Left/Right are fed VOUT1L/R */
142         {"Front", NULL, "VOUT1L"},
143         {"Front", NULL, "VOUT1R"},
144 
145         /* Center/Sub are fed VOUT2L/R */
146         {"Center+Sub", NULL, "VOUT2L"},
147         {"Center+Sub", NULL, "VOUT2R"},
148 
149         /* Rear Left/Right are fed VOUT3L/R */
150         {"Rear", NULL, "VOUT3L"},
151         {"Rear", NULL, "VOUT3R"},
152 };
153 
154 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
155 {
156         struct snd_soc_codec *codec = rtd->codec;
157         struct snd_soc_dapm_context *dapm = &codec->dapm;
158 
159         /* Enabling the microphone requires the fitting of a 0R
160          * resistor to connect the line from the microphone jack.
161          */
162         snd_soc_dapm_disable_pin(dapm, "MicIn");
163 
164         return 0;
165 }
166 
167 enum {
168         PRI_PLAYBACK = 0,
169         PRI_CAPTURE,
170         SEC_PLAYBACK,
171 };
172 
173 static struct snd_soc_dai_link smdk_dai[] = {
174         [PRI_PLAYBACK] = { /* Primary Playback i/f */
175                 .name = "WM8580 PAIF RX",
176                 .stream_name = "Playback",
177                 .cpu_dai_name = "samsung-i2s.0",
178                 .codec_dai_name = "wm8580-hifi-playback",
179                 .platform_name = "samsung-i2s.0",
180                 .codec_name = "wm8580.0-001b",
181                 .ops = &smdk_ops,
182         },
183         [PRI_CAPTURE] = { /* Primary Capture i/f */
184                 .name = "WM8580 PAIF TX",
185                 .stream_name = "Capture",
186                 .cpu_dai_name = "samsung-i2s.0",
187                 .codec_dai_name = "wm8580-hifi-capture",
188                 .platform_name = "samsung-i2s.0",
189                 .codec_name = "wm8580.0-001b",
190                 .init = smdk_wm8580_init_paiftx,
191                 .ops = &smdk_ops,
192         },
193         [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
194                 .name = "Sec_FIFO TX",
195                 .stream_name = "Playback",
196                 .cpu_dai_name = "samsung-i2s-sec",
197                 .codec_dai_name = "wm8580-hifi-playback",
198                 .platform_name = "samsung-i2s-sec",
199                 .codec_name = "wm8580.0-001b",
200                 .ops = &smdk_ops,
201         },
202 };
203 
204 static struct snd_soc_card smdk = {
205         .name = "SMDK-I2S",
206         .owner = THIS_MODULE,
207         .dai_link = smdk_dai,
208         .num_links = 2,
209 
210         .dapm_widgets = smdk_wm8580_dapm_widgets,
211         .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
212         .dapm_routes = smdk_wm8580_audio_map,
213         .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
214 };
215 
216 static struct platform_device *smdk_snd_device;
217 
218 static int __init smdk_audio_init(void)
219 {
220         int ret;
221         char *str;
222 
223         if (machine_is_smdkc100()
224                         || machine_is_smdkv210() || machine_is_smdkc110()) {
225                 smdk.num_links = 3;
226         } else if (machine_is_smdk6410()) {
227                 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
228                 str[strlen(str) - 1] = '2';
229                 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
230                 str[strlen(str) - 1] = '2';
231         }
232 
233         smdk_snd_device = platform_device_alloc("soc-audio", -1);
234         if (!smdk_snd_device)
235                 return -ENOMEM;
236 
237         platform_set_drvdata(smdk_snd_device, &smdk);
238         ret = platform_device_add(smdk_snd_device);
239 
240         if (ret)
241                 platform_device_put(smdk_snd_device);
242 
243         return ret;
244 }
245 module_init(smdk_audio_init);
246 
247 static void __exit smdk_audio_exit(void)
248 {
249         platform_device_unregister(smdk_snd_device);
250 }
251 module_exit(smdk_audio_exit);
252 
253 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
254 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
255 MODULE_LICENSE("GPL");
256 

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