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

  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 dai_format, 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         /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
 53         if (mclk < 8000000 || mclk > 27000000) {
 54                 dev_err(codec_dai->dev, "Invalid mclk frequency: %u.%03uMHz\n",
 55                         mclk / 1000000, mclk / 1000 % 1000);
 56                 return -EINVAL;
 57         }
 58 
 59         /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
 60         ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
 61         if (ret) {
 62                 dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
 63                         mclk / 1000000, mclk / 1000 % 1000);
 64                 return ret;
 65         }
 66 
 67         /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
 68         ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
 69         if (ret) {
 70                 dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
 71                         mclk / 1000000, mclk / 1000 % 1000);
 72                 return ret;
 73         }
 74 
 75         /* set codec to slave mode */
 76         dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 77                         SND_SOC_DAIFMT_CBS_CFS;
 78 
 79         /* set codec DAI configuration */
 80         ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
 81         if (ret) {
 82                 dev_err(codec_dai->dev, "Failed to set dai format to %08x\n",
 83                         dai_format);
 84                 return ret;
 85         }
 86 
 87         /* set cpu DAI configuration */
 88         ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
 89         if (ret) {
 90                 dev_err(cpu_dai->dev, "Failed to set dai format to %08x\n",
 91                         dai_format);
 92                 return ret;
 93         }
 94 
 95         return 0;
 96 }
 97 
 98 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
 99         .hw_params = mxs_sgtl5000_hw_params,
100 };
101 
102 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
103         {
104                 .name           = "HiFi Tx",
105                 .stream_name    = "HiFi Playback",
106                 .codec_dai_name = "sgtl5000",
107                 .ops            = &mxs_sgtl5000_hifi_ops,
108                 .playback_only  = true,
109         }, {
110                 .name           = "HiFi Rx",
111                 .stream_name    = "HiFi Capture",
112                 .codec_dai_name = "sgtl5000",
113                 .ops            = &mxs_sgtl5000_hifi_ops,
114                 .capture_only   = true,
115         },
116 };
117 
118 static struct snd_soc_card mxs_sgtl5000 = {
119         .name           = "mxs_sgtl5000",
120         .owner          = THIS_MODULE,
121         .dai_link       = mxs_sgtl5000_dai,
122         .num_links      = ARRAY_SIZE(mxs_sgtl5000_dai),
123 };
124 
125 static int mxs_sgtl5000_probe(struct platform_device *pdev)
126 {
127         struct snd_soc_card *card = &mxs_sgtl5000;
128         int ret, i;
129         struct device_node *np = pdev->dev.of_node;
130         struct device_node *saif_np[2], *codec_np;
131 
132         saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
133         saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
134         codec_np = of_parse_phandle(np, "audio-codec", 0);
135         if (!saif_np[0] || !saif_np[1] || !codec_np) {
136                 dev_err(&pdev->dev, "phandle missing or invalid\n");
137                 return -EINVAL;
138         }
139 
140         for (i = 0; i < 2; i++) {
141                 mxs_sgtl5000_dai[i].codec_name = NULL;
142                 mxs_sgtl5000_dai[i].codec_of_node = codec_np;
143                 mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
144                 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
145                 mxs_sgtl5000_dai[i].platform_name = NULL;
146                 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
147         }
148 
149         of_node_put(codec_np);
150         of_node_put(saif_np[0]);
151         of_node_put(saif_np[1]);
152 
153         /*
154          * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
155          * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
156          * should be >= 8MHz and <= 27M.
157          */
158         ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
159         if (ret) {
160                 dev_err(&pdev->dev, "failed to get mclk\n");
161                 return ret;
162         }
163 
164         card->dev = &pdev->dev;
165         platform_set_drvdata(pdev, card);
166 
167         ret = snd_soc_register_card(card);
168         if (ret) {
169                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
170                         ret);
171                 return ret;
172         }
173 
174         return 0;
175 }
176 
177 static int mxs_sgtl5000_remove(struct platform_device *pdev)
178 {
179         struct snd_soc_card *card = platform_get_drvdata(pdev);
180 
181         mxs_saif_put_mclk(0);
182 
183         snd_soc_unregister_card(card);
184 
185         return 0;
186 }
187 
188 static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
189         { .compatible = "fsl,mxs-audio-sgtl5000", },
190         { /* sentinel */ }
191 };
192 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
193 
194 static struct platform_driver mxs_sgtl5000_audio_driver = {
195         .driver = {
196                 .name = "mxs-sgtl5000",
197                 .owner = THIS_MODULE,
198                 .of_match_table = mxs_sgtl5000_dt_ids,
199         },
200         .probe = mxs_sgtl5000_probe,
201         .remove = mxs_sgtl5000_remove,
202 };
203 
204 module_platform_driver(mxs_sgtl5000_audio_driver);
205 
206 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
207 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
208 MODULE_LICENSE("GPL");
209 MODULE_ALIAS("platform:mxs-sgtl5000");
210 

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