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

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  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/of_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 = container_of(rtd->card,
 37                                         struct imx_sgtl5000_data, card);
 38         struct device *dev = rtd->card->dev;
 39         int ret;
 40 
 41         ret = snd_soc_dai_set_sysclk(rtd->codec_dai, SGTL5000_SYSCLK,
 42                                      data->clk_frequency, SND_SOC_CLOCK_IN);
 43         if (ret) {
 44                 dev_err(dev, "could not set codec driver clock params\n");
 45                 return ret;
 46         }
 47 
 48         return 0;
 49 }
 50 
 51 static const struct snd_soc_dapm_widget imx_sgtl5000_dapm_widgets[] = {
 52         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 53         SND_SOC_DAPM_LINE("Line In Jack", NULL),
 54         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 55         SND_SOC_DAPM_SPK("Line Out Jack", NULL),
 56         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 57 };
 58 
 59 static int __devinit imx_sgtl5000_probe(struct platform_device *pdev)
 60 {
 61         struct device_node *np = pdev->dev.of_node;
 62         struct device_node *ssi_np, *codec_np;
 63         struct platform_device *ssi_pdev;
 64         struct i2c_client *codec_dev;
 65         struct imx_sgtl5000_data *data;
 66         int int_port, ext_port;
 67         int ret;
 68 
 69         ret = of_property_read_u32(np, "mux-int-port", &int_port);
 70         if (ret) {
 71                 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
 72                 return ret;
 73         }
 74         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
 75         if (ret) {
 76                 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
 77                 return ret;
 78         }
 79 
 80         /*
 81          * The port numbering in the hardware manual starts at 1, while
 82          * the audmux API expects it starts at 0.
 83          */
 84         int_port--;
 85         ext_port--;
 86         ret = imx_audmux_v2_configure_port(int_port,
 87                         IMX_AUDMUX_V2_PTCR_SYN |
 88                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 89                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
 90                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 91                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
 92                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
 93         if (ret) {
 94                 dev_err(&pdev->dev, "audmux internal port setup failed\n");
 95                 return ret;
 96         }
 97         ret = imx_audmux_v2_configure_port(ext_port,
 98                         IMX_AUDMUX_V2_PTCR_SYN,
 99                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
100         if (ret) {
101                 dev_err(&pdev->dev, "audmux external port setup failed\n");
102                 return ret;
103         }
104 
105         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
106         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
107         if (!ssi_np || !codec_np) {
108                 dev_err(&pdev->dev, "phandle missing or invalid\n");
109                 ret = -EINVAL;
110                 goto fail;
111         }
112 
113         ssi_pdev = of_find_device_by_node(ssi_np);
114         if (!ssi_pdev) {
115                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
116                 ret = -EINVAL;
117                 goto fail;
118         }
119         codec_dev = of_find_i2c_device_by_node(codec_np);
120         if (!codec_dev) {
121                 dev_err(&pdev->dev, "failed to find codec platform device\n");
122                 return -EINVAL;
123         }
124 
125         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
126         if (!data) {
127                 ret = -ENOMEM;
128                 goto fail;
129         }
130 
131         data->codec_clk = clk_get(&codec_dev->dev, NULL);
132         if (IS_ERR(data->codec_clk)) {
133                 /* assuming clock enabled by default */
134                 data->codec_clk = NULL;
135                 ret = of_property_read_u32(codec_np, "clock-frequency",
136                                         &data->clk_frequency);
137                 if (ret) {
138                         dev_err(&codec_dev->dev,
139                                 "clock-frequency missing or invalid\n");
140                         goto fail;
141                 }
142         } else {
143                 data->clk_frequency = clk_get_rate(data->codec_clk);
144                 clk_prepare_enable(data->codec_clk);
145         }
146 
147         data->dai.name = "HiFi";
148         data->dai.stream_name = "HiFi";
149         data->dai.codec_dai_name = "sgtl5000";
150         data->dai.codec_of_node = codec_np;
151         data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
152         data->dai.platform_name = "imx-pcm-audio";
153         data->dai.init = &imx_sgtl5000_dai_init;
154         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
155                             SND_SOC_DAIFMT_CBM_CFM;
156 
157         data->card.dev = &pdev->dev;
158         ret = snd_soc_of_parse_card_name(&data->card, "model");
159         if (ret)
160                 goto clk_fail;
161         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
162         if (ret)
163                 goto clk_fail;
164         data->card.num_links = 1;
165         data->card.dai_link = &data->dai;
166         data->card.dapm_widgets = imx_sgtl5000_dapm_widgets;
167         data->card.num_dapm_widgets = ARRAY_SIZE(imx_sgtl5000_dapm_widgets);
168 
169         ret = snd_soc_register_card(&data->card);
170         if (ret) {
171                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
172                 goto clk_fail;
173         }
174 
175         platform_set_drvdata(pdev, data);
176 clk_fail:
177         clk_put(data->codec_clk);
178 fail:
179         if (ssi_np)
180                 of_node_put(ssi_np);
181         if (codec_np)
182                 of_node_put(codec_np);
183 
184         return ret;
185 }
186 
187 static int __devexit imx_sgtl5000_remove(struct platform_device *pdev)
188 {
189         struct imx_sgtl5000_data *data = platform_get_drvdata(pdev);
190 
191         if (data->codec_clk) {
192                 clk_disable_unprepare(data->codec_clk);
193                 clk_put(data->codec_clk);
194         }
195         snd_soc_unregister_card(&data->card);
196 
197         return 0;
198 }
199 
200 static const struct of_device_id imx_sgtl5000_dt_ids[] = {
201         { .compatible = "fsl,imx-audio-sgtl5000", },
202         { /* sentinel */ }
203 };
204 MODULE_DEVICE_TABLE(of, imx_sgtl5000_dt_ids);
205 
206 static struct platform_driver imx_sgtl5000_driver = {
207         .driver = {
208                 .name = "imx-sgtl5000",
209                 .owner = THIS_MODULE,
210                 .of_match_table = imx_sgtl5000_dt_ids,
211         },
212         .probe = imx_sgtl5000_probe,
213         .remove = __devexit_p(imx_sgtl5000_remove),
214 };
215 module_platform_driver(imx_sgtl5000_driver);
216 
217 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
218 MODULE_DESCRIPTION("Freescale i.MX SGTL5000 ASoC machine driver");
219 MODULE_LICENSE("GPL v2");
220 MODULE_ALIAS("platform:imx-sgtl5000");
221 

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