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Linux/sound/soc/fsl/imx-sgtl5000.c

  1 /*
  2  * Copyright 2012 Freescale Semiconductor, Inc.
  3  * Copyright 2012 Linaro Ltd.
  4  *
  5  * The code contained herein is licensed under the GNU General Public
  6  * License. You may obtain a copy of the GNU General Public License
  7  * Version 2 or later at the following locations:
  8  *
  9  * http://www.opensource.org/licenses/gpl-license.html
 10  * http://www.gnu.org/copyleft/gpl.html
 11  */
 12 
 13 #include <linux/module.h>
 14 #include <linux/of.h>
 15 #include <linux/of_platform.h>
 16 #include <linux/i2c.h>
 17 #include <linux/clk.h>
 18 #include <sound/soc.h>
 19 
 20 #include "../codecs/sgtl5000.h"
 21 #include "imx-audmux.h"
 22 
 23 #define DAI_NAME_SIZE   32
 24 
 25 struct imx_sgtl5000_data {
 26         struct snd_soc_dai_link dai;
 27         struct snd_soc_card card;
 28         char codec_dai_name[DAI_NAME_SIZE];
 29         char platform_name[DAI_NAME_SIZE];
 30         struct clk *codec_clk;
 31         unsigned int clk_frequency;
 32 };
 33 
 34 static int imx_sgtl5000_dai_init(struct snd_soc_pcm_runtime *rtd)
 35 {
 36         struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(rtd->card);
 37         struct device *dev = rtd->card->dev;
 38         int ret;
 39 
 40         ret = snd_soc_dai_set_sysclk(rtd->codec_dai, SGTL5000_SYSCLK,
 41                                      data->clk_frequency, SND_SOC_CLOCK_IN);
 42         if (ret) {
 43                 dev_err(dev, "could not set codec driver clock params\n");
 44                 return ret;
 45         }
 46 
 47         return 0;
 48 }
 49 
 50 static const struct snd_soc_dapm_widget imx_sgtl5000_dapm_widgets[] = {
 51         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 52         SND_SOC_DAPM_LINE("Line In Jack", NULL),
 53         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 54         SND_SOC_DAPM_SPK("Line Out Jack", NULL),
 55         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 56 };
 57 
 58 static int imx_sgtl5000_probe(struct platform_device *pdev)
 59 {
 60         struct device_node *np = pdev->dev.of_node;
 61         struct device_node *ssi_np, *codec_np;
 62         struct platform_device *ssi_pdev;
 63         struct i2c_client *codec_dev;
 64         struct imx_sgtl5000_data *data = NULL;
 65         int int_port, ext_port;
 66         int ret;
 67 
 68         ret = of_property_read_u32(np, "mux-int-port", &int_port);
 69         if (ret) {
 70                 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
 71                 return ret;
 72         }
 73         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 74         if (ret) {
 75                 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
 76                 return ret;
 77         }
 78 
 79         /*
 80          * The port numbering in the hardware manual starts at 1, while
 81          * the audmux API expects it starts at 0.
 82          */
 83         int_port--;
 84         ext_port--;
 85         ret = imx_audmux_v2_configure_port(int_port,
 86                         IMX_AUDMUX_V2_PTCR_SYN |
 87                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 88                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 89                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 90                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
 91                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 92         if (ret) {
 93                 dev_err(&pdev->dev, "audmux internal port setup failed\n");
 94                 return ret;
 95         }
 96         ret = imx_audmux_v2_configure_port(ext_port,
 97                         IMX_AUDMUX_V2_PTCR_SYN,
 98                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
 99         if (ret) {
100                 dev_err(&pdev->dev, "audmux external port setup failed\n");
101                 return ret;
102         }
103 
104         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
105         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
106         if (!ssi_np || !codec_np) {
107                 dev_err(&pdev->dev, "phandle missing or invalid\n");
108                 ret = -EINVAL;
109                 goto fail;
110         }
111 
112         ssi_pdev = of_find_device_by_node(ssi_np);
113         if (!ssi_pdev) {
114                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
115                 ret = -EPROBE_DEFER;
116                 goto fail;
117         }
118         codec_dev = of_find_i2c_device_by_node(codec_np);
119         if (!codec_dev) {
120                 dev_err(&pdev->dev, "failed to find codec platform device\n");
121                 return -EPROBE_DEFER;
122         }
123 
124         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
125         if (!data) {
126                 ret = -ENOMEM;
127                 goto fail;
128         }
129 
130         data->codec_clk = clk_get(&codec_dev->dev, NULL);
131         if (IS_ERR(data->codec_clk)) {
132                 ret = PTR_ERR(data->codec_clk);
133                 goto fail;
134         }
135 
136         data->clk_frequency = clk_get_rate(data->codec_clk);
137 
138         data->dai.name = "HiFi";
139         data->dai.stream_name = "HiFi";
140         data->dai.codec_dai_name = "sgtl5000";
141         data->dai.codec_of_node = codec_np;
142         data->dai.cpu_of_node = ssi_np;
143         data->dai.platform_of_node = ssi_np;
144         data->dai.init = &imx_sgtl5000_dai_init;
145         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
146                             SND_SOC_DAIFMT_CBM_CFM;
147 
148         data->card.dev = &pdev->dev;
149         ret = snd_soc_of_parse_card_name(&data->card, "model");
150         if (ret)
151                 goto fail;
152         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
153         if (ret)
154                 goto fail;
155         data->card.num_links = 1;
156         data->card.owner = THIS_MODULE;
157         data->card.dai_link = &data->dai;
158         data->card.dapm_widgets = imx_sgtl5000_dapm_widgets;
159         data->card.num_dapm_widgets = ARRAY_SIZE(imx_sgtl5000_dapm_widgets);
160 
161         platform_set_drvdata(pdev, &data->card);
162         snd_soc_card_set_drvdata(&data->card, data);
163 
164         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
165         if (ret) {
166                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
167                 goto fail;
168         }
169 
170         of_node_put(ssi_np);
171         of_node_put(codec_np);
172 
173         return 0;
174 
175 fail:
176         if (data && !IS_ERR(data->codec_clk))
177                 clk_put(data->codec_clk);
178         if (ssi_np)
179                 of_node_put(ssi_np);
180         if (codec_np)
181                 of_node_put(codec_np);
182 
183         return ret;
184 }
185 
186 static int imx_sgtl5000_remove(struct platform_device *pdev)
187 {
188         struct snd_soc_card *card = platform_get_drvdata(pdev);
189         struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(card);
190 
191         clk_put(data->codec_clk);
192 
193         return 0;
194 }
195 
196 static const struct of_device_id imx_sgtl5000_dt_ids[] = {
197         { .compatible = "fsl,imx-audio-sgtl5000", },
198         { /* sentinel */ }
199 };
200 MODULE_DEVICE_TABLE(of, imx_sgtl5000_dt_ids);
201 
202 static struct platform_driver imx_sgtl5000_driver = {
203         .driver = {
204                 .name = "imx-sgtl5000",
205                 .owner = THIS_MODULE,
206                 .pm = &snd_soc_pm_ops,
207                 .of_match_table = imx_sgtl5000_dt_ids,
208         },
209         .probe = imx_sgtl5000_probe,
210         .remove = imx_sgtl5000_remove,
211 };
212 module_platform_driver(imx_sgtl5000_driver);
213 
214 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
215 MODULE_DESCRIPTION("Freescale i.MX SGTL5000 ASoC machine driver");
216 MODULE_LICENSE("GPL v2");
217 MODULE_ALIAS("platform:imx-sgtl5000");
218 

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