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Linux/sound/soc/mxs/mxs-sgtl5000.c

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  1 /*
  2  * Copyright 2011 Freescale Semiconductor, Inc.
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License as published by
  6  * the Free Software Foundation; either version 2 of the License, or
  7  * (at your option) any later version.
  8  *
  9  * This program is distributed in the hope that it will be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12  * GNU General Public License for more details.
 13  *
 14  * You should have received a copy of the GNU General Public License along
 15  * with this program; if not, write to the Free Software Foundation, Inc.,
 16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 17  */
 18 
 19 #include <linux/module.h>
 20 #include <linux/device.h>
 21 #include <linux/of.h>
 22 #include <linux/of_device.h>
 23 #include <sound/core.h>
 24 #include <sound/pcm.h>
 25 #include <sound/soc.h>
 26 #include <sound/jack.h>
 27 #include <sound/soc-dapm.h>
 28 
 29 #include "../codecs/sgtl5000.h"
 30 #include "mxs-saif.h"
 31 
 32 static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
 33         struct snd_pcm_hw_params *params)
 34 {
 35         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 36         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 37         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 38         unsigned int rate = params_rate(params);
 39         u32 mclk;
 40         int ret;
 41 
 42         /* sgtl5000 does not support 512*rate when in 96000 fs */
 43         switch (rate) {
 44         case 96000:
 45                 mclk = 256 * rate;
 46                 break;
 47         default:
 48                 mclk = 512 * rate;
 49                 break;
 50         }
 51 
 52         /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
 53         ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
 54         if (ret) {
 55                 dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
 56                         mclk / 1000000, mclk / 1000 % 1000);
 57                 return ret;
 58         }
 59 
 60         /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
 61         ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
 62         if (ret) {
 63                 dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
 64                         mclk / 1000000, mclk / 1000 % 1000);
 65                 return ret;
 66         }
 67 
 68         return 0;
 69 }
 70 
 71 static const struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
 72         .hw_params = mxs_sgtl5000_hw_params,
 73 };
 74 
 75 #define MXS_SGTL5000_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
 76         SND_SOC_DAIFMT_CBS_CFS)
 77 
 78 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
 79         {
 80                 .name           = "HiFi Tx",
 81                 .stream_name    = "HiFi Playback",
 82                 .codec_dai_name = "sgtl5000",
 83                 .dai_fmt        = MXS_SGTL5000_DAI_FMT,
 84                 .ops            = &mxs_sgtl5000_hifi_ops,
 85                 .playback_only  = true,
 86         }, {
 87                 .name           = "HiFi Rx",
 88                 .stream_name    = "HiFi Capture",
 89                 .codec_dai_name = "sgtl5000",
 90                 .dai_fmt        = MXS_SGTL5000_DAI_FMT,
 91                 .ops            = &mxs_sgtl5000_hifi_ops,
 92                 .capture_only   = true,
 93         },
 94 };
 95 
 96 static const struct snd_soc_dapm_widget mxs_sgtl5000_dapm_widgets[] = {
 97         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 98         SND_SOC_DAPM_LINE("Line In Jack", NULL),
 99         SND_SOC_DAPM_HP("Headphone Jack", NULL),
100         SND_SOC_DAPM_SPK("Line Out Jack", NULL),
101         SND_SOC_DAPM_SPK("Ext Spk", NULL),
102 };
103 
104 static struct snd_soc_card mxs_sgtl5000 = {
105         .name           = "mxs_sgtl5000",
106         .owner          = THIS_MODULE,
107         .dai_link       = mxs_sgtl5000_dai,
108         .num_links      = ARRAY_SIZE(mxs_sgtl5000_dai),
109 };
110 
111 static int mxs_sgtl5000_probe(struct platform_device *pdev)
112 {
113         struct snd_soc_card *card = &mxs_sgtl5000;
114         int ret, i;
115         struct device_node *np = pdev->dev.of_node;
116         struct device_node *saif_np[2], *codec_np;
117 
118         saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
119         saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
120         codec_np = of_parse_phandle(np, "audio-codec", 0);
121         if (!saif_np[0] || !saif_np[1] || !codec_np) {
122                 dev_err(&pdev->dev, "phandle missing or invalid\n");
123                 return -EINVAL;
124         }
125 
126         for (i = 0; i < 2; i++) {
127                 mxs_sgtl5000_dai[i].codec_name = NULL;
128                 mxs_sgtl5000_dai[i].codec_of_node = codec_np;
129                 mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
130                 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
131                 mxs_sgtl5000_dai[i].platform_name = NULL;
132                 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
133         }
134 
135         of_node_put(codec_np);
136         of_node_put(saif_np[0]);
137         of_node_put(saif_np[1]);
138 
139         /*
140          * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
141          * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
142          * should be >= 8MHz and <= 27M.
143          */
144         ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
145         if (ret) {
146                 dev_err(&pdev->dev, "failed to get mclk\n");
147                 return ret;
148         }
149 
150         card->dev = &pdev->dev;
151 
152         if (of_find_property(np, "audio-routing", NULL)) {
153                 card->dapm_widgets = mxs_sgtl5000_dapm_widgets;
154                 card->num_dapm_widgets = ARRAY_SIZE(mxs_sgtl5000_dapm_widgets);
155 
156                 ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
157                 if (ret) {
158                         dev_err(&pdev->dev, "failed to parse audio-routing (%d)\n",
159                                 ret);
160                         return ret;
161                 }
162         }
163 
164         ret = devm_snd_soc_register_card(&pdev->dev, card);
165         if (ret) {
166                 if (ret != -EPROBE_DEFER)
167                         dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
168                                 ret);
169                 return ret;
170         }
171 
172         return 0;
173 }
174 
175 static int mxs_sgtl5000_remove(struct platform_device *pdev)
176 {
177         mxs_saif_put_mclk(0);
178 
179         return 0;
180 }
181 
182 static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
183         { .compatible = "fsl,mxs-audio-sgtl5000", },
184         { /* sentinel */ }
185 };
186 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
187 
188 static struct platform_driver mxs_sgtl5000_audio_driver = {
189         .driver = {
190                 .name = "mxs-sgtl5000",
191                 .of_match_table = mxs_sgtl5000_dt_ids,
192         },
193         .probe = mxs_sgtl5000_probe,
194         .remove = mxs_sgtl5000_remove,
195 };
196 
197 module_platform_driver(mxs_sgtl5000_audio_driver);
198 
199 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
200 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
201 MODULE_LICENSE("GPL");
202 MODULE_ALIAS("platform:mxs-sgtl5000");
203 

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