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Linux/sound/soc/fsl/imx-wm8962.c

  1 /*
  2  * Copyright 2013 Freescale Semiconductor, Inc.
  3  *
  4  * Based on imx-sgtl5000.c
  5  * Copyright 2012 Freescale Semiconductor, Inc.
  6  * Copyright 2012 Linaro Ltd.
  7  *
  8  * The code contained herein is licensed under the GNU General Public
  9  * License. You may obtain a copy of the GNU General Public License
 10  * Version 2 or later at the following locations:
 11  *
 12  * http://www.opensource.org/licenses/gpl-license.html
 13  * http://www.gnu.org/copyleft/gpl.html
 14  */
 15 
 16 #include <linux/module.h>
 17 #include <linux/of_platform.h>
 18 #include <linux/i2c.h>
 19 #include <linux/slab.h>
 20 #include <linux/clk.h>
 21 #include <sound/soc.h>
 22 #include <sound/pcm_params.h>
 23 #include <sound/soc-dapm.h>
 24 #include <linux/pinctrl/consumer.h>
 25 
 26 #include "../codecs/wm8962.h"
 27 #include "imx-audmux.h"
 28 
 29 #define DAI_NAME_SIZE   32
 30 
 31 struct imx_wm8962_data {
 32         struct snd_soc_dai_link dai;
 33         struct snd_soc_card card;
 34         char codec_dai_name[DAI_NAME_SIZE];
 35         char platform_name[DAI_NAME_SIZE];
 36         struct clk *codec_clk;
 37         unsigned int clk_frequency;
 38 };
 39 
 40 struct imx_priv {
 41         struct platform_device *pdev;
 42 };
 43 static struct imx_priv card_priv;
 44 
 45 static const struct snd_soc_dapm_widget imx_wm8962_dapm_widgets[] = {
 46         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 47         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 48         SND_SOC_DAPM_MIC("AMIC", NULL),
 49         SND_SOC_DAPM_MIC("DMIC", NULL),
 50 };
 51 
 52 static int sample_rate = 44100;
 53 static snd_pcm_format_t sample_format = SNDRV_PCM_FORMAT_S16_LE;
 54 
 55 static int imx_hifi_hw_params(struct snd_pcm_substream *substream,
 56                 struct snd_pcm_hw_params *params)
 57 {
 58         sample_rate = params_rate(params);
 59         sample_format = params_format(params);
 60 
 61         return 0;
 62 }
 63 
 64 static struct snd_soc_ops imx_hifi_ops = {
 65         .hw_params = imx_hifi_hw_params,
 66 };
 67 
 68 static int imx_wm8962_set_bias_level(struct snd_soc_card *card,
 69                                         struct snd_soc_dapm_context *dapm,
 70                                         enum snd_soc_bias_level level)
 71 {
 72         struct snd_soc_pcm_runtime *rtd;
 73         struct snd_soc_dai *codec_dai;
 74         struct imx_priv *priv = &card_priv;
 75         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
 76         struct device *dev = &priv->pdev->dev;
 77         unsigned int pll_out;
 78         int ret;
 79 
 80         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 81         codec_dai = rtd->codec_dai;
 82         if (dapm->dev != codec_dai->dev)
 83                 return 0;
 84 
 85         switch (level) {
 86         case SND_SOC_BIAS_PREPARE:
 87                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
 88                         if (sample_format == SNDRV_PCM_FORMAT_S24_LE)
 89                                 pll_out = sample_rate * 384;
 90                         else
 91                                 pll_out = sample_rate * 256;
 92 
 93                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 94                                         WM8962_FLL_MCLK, data->clk_frequency,
 95                                         pll_out);
 96                         if (ret < 0) {
 97                                 dev_err(dev, "failed to start FLL: %d\n", ret);
 98                                 return ret;
 99                         }
100 
101                         ret = snd_soc_dai_set_sysclk(codec_dai,
102                                         WM8962_SYSCLK_FLL, pll_out,
103                                         SND_SOC_CLOCK_IN);
104                         if (ret < 0) {
105                                 dev_err(dev, "failed to set SYSCLK: %d\n", ret);
106                                 return ret;
107                         }
108                 }
109                 break;
110 
111         case SND_SOC_BIAS_STANDBY:
112                 if (dapm->bias_level == SND_SOC_BIAS_PREPARE) {
113                         ret = snd_soc_dai_set_sysclk(codec_dai,
114                                         WM8962_SYSCLK_MCLK, data->clk_frequency,
115                                         SND_SOC_CLOCK_IN);
116                         if (ret < 0) {
117                                 dev_err(dev,
118                                         "failed to switch away from FLL: %d\n",
119                                         ret);
120                                 return ret;
121                         }
122 
123                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
124                                         0, 0, 0);
125                         if (ret < 0) {
126                                 dev_err(dev, "failed to stop FLL: %d\n", ret);
127                                 return ret;
128                         }
129                 }
130                 break;
131 
132         default:
133                 break;
134         }
135 
136         return 0;
137 }
138 
139 static int imx_wm8962_late_probe(struct snd_soc_card *card)
140 {
141         struct snd_soc_pcm_runtime *rtd;
142         struct snd_soc_dai *codec_dai;
143         struct imx_priv *priv = &card_priv;
144         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
145         struct device *dev = &priv->pdev->dev;
146         int ret;
147 
148         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
149         codec_dai = rtd->codec_dai;
150         ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
151                         data->clk_frequency, SND_SOC_CLOCK_IN);
152         if (ret < 0)
153                 dev_err(dev, "failed to set sysclk in %s\n", __func__);
154 
155         return ret;
156 }
157 
158 static int imx_wm8962_probe(struct platform_device *pdev)
159 {
160         struct device_node *np = pdev->dev.of_node;
161         struct device_node *ssi_np, *codec_np;
162         struct platform_device *ssi_pdev;
163         struct imx_priv *priv = &card_priv;
164         struct i2c_client *codec_dev;
165         struct imx_wm8962_data *data;
166         int int_port, ext_port;
167         int ret;
168 
169         priv->pdev = pdev;
170 
171         ret = of_property_read_u32(np, "mux-int-port", &int_port);
172         if (ret) {
173                 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
174                 return ret;
175         }
176         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
177         if (ret) {
178                 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
179                 return ret;
180         }
181 
182         /*
183          * The port numbering in the hardware manual starts at 1, while
184          * the audmux API expects it starts at 0.
185          */
186         int_port--;
187         ext_port--;
188         ret = imx_audmux_v2_configure_port(int_port,
189                         IMX_AUDMUX_V2_PTCR_SYN |
190                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
191                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
192                         IMX_AUDMUX_V2_PTCR_TFSDIR |
193                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
194                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
195         if (ret) {
196                 dev_err(&pdev->dev, "audmux internal port setup failed\n");
197                 return ret;
198         }
199         ret = imx_audmux_v2_configure_port(ext_port,
200                         IMX_AUDMUX_V2_PTCR_SYN,
201                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
202         if (ret) {
203                 dev_err(&pdev->dev, "audmux external port setup failed\n");
204                 return ret;
205         }
206 
207         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
208         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
209         if (!ssi_np || !codec_np) {
210                 dev_err(&pdev->dev, "phandle missing or invalid\n");
211                 ret = -EINVAL;
212                 goto fail;
213         }
214 
215         ssi_pdev = of_find_device_by_node(ssi_np);
216         if (!ssi_pdev) {
217                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
218                 ret = -EINVAL;
219                 goto fail;
220         }
221         codec_dev = of_find_i2c_device_by_node(codec_np);
222         if (!codec_dev || !codec_dev->dev.driver) {
223                 dev_err(&pdev->dev, "failed to find codec platform device\n");
224                 ret = -EINVAL;
225                 goto fail;
226         }
227 
228         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
229         if (!data) {
230                 ret = -ENOMEM;
231                 goto fail;
232         }
233 
234         data->codec_clk = devm_clk_get(&codec_dev->dev, NULL);
235         if (IS_ERR(data->codec_clk)) {
236                 ret = PTR_ERR(data->codec_clk);
237                 dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);
238                 goto fail;
239         }
240 
241         data->clk_frequency = clk_get_rate(data->codec_clk);
242         ret = clk_prepare_enable(data->codec_clk);
243         if (ret) {
244                 dev_err(&codec_dev->dev, "failed to enable codec clk: %d\n", ret);
245                 goto fail;
246         }
247 
248         data->dai.name = "HiFi";
249         data->dai.stream_name = "HiFi";
250         data->dai.codec_dai_name = "wm8962";
251         data->dai.codec_of_node = codec_np;
252         data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
253         data->dai.platform_of_node = ssi_np;
254         data->dai.ops = &imx_hifi_ops;
255         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
256                             SND_SOC_DAIFMT_CBM_CFM;
257 
258         data->card.dev = &pdev->dev;
259         ret = snd_soc_of_parse_card_name(&data->card, "model");
260         if (ret)
261                 goto clk_fail;
262         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
263         if (ret)
264                 goto clk_fail;
265         data->card.num_links = 1;
266         data->card.owner = THIS_MODULE;
267         data->card.dai_link = &data->dai;
268         data->card.dapm_widgets = imx_wm8962_dapm_widgets;
269         data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);
270 
271         data->card.late_probe = imx_wm8962_late_probe;
272         data->card.set_bias_level = imx_wm8962_set_bias_level;
273 
274         platform_set_drvdata(pdev, &data->card);
275         snd_soc_card_set_drvdata(&data->card, data);
276 
277         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
278         if (ret) {
279                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
280                 goto clk_fail;
281         }
282 
283         of_node_put(ssi_np);
284         of_node_put(codec_np);
285 
286         return 0;
287 
288 clk_fail:
289         clk_disable_unprepare(data->codec_clk);
290 fail:
291         of_node_put(ssi_np);
292         of_node_put(codec_np);
293 
294         return ret;
295 }
296 
297 static int imx_wm8962_remove(struct platform_device *pdev)
298 {
299         struct snd_soc_card *card = platform_get_drvdata(pdev);
300         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
301 
302         if (!IS_ERR(data->codec_clk))
303                 clk_disable_unprepare(data->codec_clk);
304 
305         return 0;
306 }
307 
308 static const struct of_device_id imx_wm8962_dt_ids[] = {
309         { .compatible = "fsl,imx-audio-wm8962", },
310         { /* sentinel */ }
311 };
312 MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
313 
314 static struct platform_driver imx_wm8962_driver = {
315         .driver = {
316                 .name = "imx-wm8962",
317                 .pm = &snd_soc_pm_ops,
318                 .of_match_table = imx_wm8962_dt_ids,
319         },
320         .probe = imx_wm8962_probe,
321         .remove = imx_wm8962_remove,
322 };
323 module_platform_driver(imx_wm8962_driver);
324 
325 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
326 MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
327 MODULE_LICENSE("GPL v2");
328 MODULE_ALIAS("platform:imx-wm8962");
329 

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