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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_dai *codec_dai = card->rtd[0].codec_dai;
 73         struct imx_priv *priv = &card_priv;
 74         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
 75         struct device *dev = &priv->pdev->dev;
 76         unsigned int pll_out;
 77         int ret;
 78 
 79         if (dapm->dev != codec_dai->dev)
 80                 return 0;
 81 
 82         switch (level) {
 83         case SND_SOC_BIAS_PREPARE:
 84                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
 85                         if (sample_format == SNDRV_PCM_FORMAT_S24_LE)
 86                                 pll_out = sample_rate * 384;
 87                         else
 88                                 pll_out = sample_rate * 256;
 89 
 90                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 91                                         WM8962_FLL_MCLK, data->clk_frequency,
 92                                         pll_out);
 93                         if (ret < 0) {
 94                                 dev_err(dev, "failed to start FLL: %d\n", ret);
 95                                 return ret;
 96                         }
 97 
 98                         ret = snd_soc_dai_set_sysclk(codec_dai,
 99                                         WM8962_SYSCLK_FLL, pll_out,
100                                         SND_SOC_CLOCK_IN);
101                         if (ret < 0) {
102                                 dev_err(dev, "failed to set SYSCLK: %d\n", ret);
103                                 return ret;
104                         }
105                 }
106                 break;
107 
108         case SND_SOC_BIAS_STANDBY:
109                 if (dapm->bias_level == SND_SOC_BIAS_PREPARE) {
110                         ret = snd_soc_dai_set_sysclk(codec_dai,
111                                         WM8962_SYSCLK_MCLK, data->clk_frequency,
112                                         SND_SOC_CLOCK_IN);
113                         if (ret < 0) {
114                                 dev_err(dev,
115                                         "failed to switch away from FLL: %d\n",
116                                         ret);
117                                 return ret;
118                         }
119 
120                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
121                                         0, 0, 0);
122                         if (ret < 0) {
123                                 dev_err(dev, "failed to stop FLL: %d\n", ret);
124                                 return ret;
125                         }
126                 }
127                 break;
128 
129         default:
130                 break;
131         }
132 
133         return 0;
134 }
135 
136 static int imx_wm8962_late_probe(struct snd_soc_card *card)
137 {
138         struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
139         struct imx_priv *priv = &card_priv;
140         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
141         struct device *dev = &priv->pdev->dev;
142         int ret;
143 
144         ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
145                         data->clk_frequency, SND_SOC_CLOCK_IN);
146         if (ret < 0)
147                 dev_err(dev, "failed to set sysclk in %s\n", __func__);
148 
149         return ret;
150 }
151 
152 static int imx_wm8962_probe(struct platform_device *pdev)
153 {
154         struct device_node *np = pdev->dev.of_node;
155         struct device_node *ssi_np, *codec_np;
156         struct platform_device *ssi_pdev;
157         struct imx_priv *priv = &card_priv;
158         struct i2c_client *codec_dev;
159         struct imx_wm8962_data *data;
160         int int_port, ext_port;
161         int ret;
162 
163         priv->pdev = pdev;
164 
165         ret = of_property_read_u32(np, "mux-int-port", &int_port);
166         if (ret) {
167                 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
168                 return ret;
169         }
170         ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
171         if (ret) {
172                 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
173                 return ret;
174         }
175 
176         /*
177          * The port numbering in the hardware manual starts at 1, while
178          * the audmux API expects it starts at 0.
179          */
180         int_port--;
181         ext_port--;
182         ret = imx_audmux_v2_configure_port(int_port,
183                         IMX_AUDMUX_V2_PTCR_SYN |
184                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
185                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
186                         IMX_AUDMUX_V2_PTCR_TFSDIR |
187                         IMX_AUDMUX_V2_PTCR_TCLKDIR,
188                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
189         if (ret) {
190                 dev_err(&pdev->dev, "audmux internal port setup failed\n");
191                 return ret;
192         }
193         imx_audmux_v2_configure_port(ext_port,
194                         IMX_AUDMUX_V2_PTCR_SYN,
195                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
196         if (ret) {
197                 dev_err(&pdev->dev, "audmux external port setup failed\n");
198                 return ret;
199         }
200 
201         ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
202         codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
203         if (!ssi_np || !codec_np) {
204                 dev_err(&pdev->dev, "phandle missing or invalid\n");
205                 ret = -EINVAL;
206                 goto fail;
207         }
208 
209         ssi_pdev = of_find_device_by_node(ssi_np);
210         if (!ssi_pdev) {
211                 dev_err(&pdev->dev, "failed to find SSI platform device\n");
212                 ret = -EINVAL;
213                 goto fail;
214         }
215         codec_dev = of_find_i2c_device_by_node(codec_np);
216         if (!codec_dev || !codec_dev->dev.driver) {
217                 dev_err(&pdev->dev, "failed to find codec platform device\n");
218                 ret = -EINVAL;
219                 goto fail;
220         }
221 
222         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
223         if (!data) {
224                 ret = -ENOMEM;
225                 goto fail;
226         }
227 
228         data->codec_clk = devm_clk_get(&codec_dev->dev, NULL);
229         if (IS_ERR(data->codec_clk)) {
230                 ret = PTR_ERR(data->codec_clk);
231                 dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret);
232                 goto fail;
233         }
234 
235         data->clk_frequency = clk_get_rate(data->codec_clk);
236         ret = clk_prepare_enable(data->codec_clk);
237         if (ret) {
238                 dev_err(&codec_dev->dev, "failed to enable codec clk: %d\n", ret);
239                 goto fail;
240         }
241 
242         data->dai.name = "HiFi";
243         data->dai.stream_name = "HiFi";
244         data->dai.codec_dai_name = "wm8962";
245         data->dai.codec_of_node = codec_np;
246         data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
247         data->dai.platform_of_node = ssi_np;
248         data->dai.ops = &imx_hifi_ops;
249         data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
250                             SND_SOC_DAIFMT_CBM_CFM;
251 
252         data->card.dev = &pdev->dev;
253         ret = snd_soc_of_parse_card_name(&data->card, "model");
254         if (ret)
255                 goto clk_fail;
256         ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
257         if (ret)
258                 goto clk_fail;
259         data->card.num_links = 1;
260         data->card.dai_link = &data->dai;
261         data->card.dapm_widgets = imx_wm8962_dapm_widgets;
262         data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);
263 
264         data->card.late_probe = imx_wm8962_late_probe;
265         data->card.set_bias_level = imx_wm8962_set_bias_level;
266 
267         platform_set_drvdata(pdev, &data->card);
268         snd_soc_card_set_drvdata(&data->card, data);
269 
270         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
271         if (ret) {
272                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
273                 goto clk_fail;
274         }
275 
276         of_node_put(ssi_np);
277         of_node_put(codec_np);
278 
279         return 0;
280 
281 clk_fail:
282         clk_disable_unprepare(data->codec_clk);
283 fail:
284         if (ssi_np)
285                 of_node_put(ssi_np);
286         if (codec_np)
287                 of_node_put(codec_np);
288 
289         return ret;
290 }
291 
292 static int imx_wm8962_remove(struct platform_device *pdev)
293 {
294         struct snd_soc_card *card = platform_get_drvdata(pdev);
295         struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
296 
297         if (!IS_ERR(data->codec_clk))
298                 clk_disable_unprepare(data->codec_clk);
299 
300         return 0;
301 }
302 
303 static const struct of_device_id imx_wm8962_dt_ids[] = {
304         { .compatible = "fsl,imx-audio-wm8962", },
305         { /* sentinel */ }
306 };
307 MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
308 
309 static struct platform_driver imx_wm8962_driver = {
310         .driver = {
311                 .name = "imx-wm8962",
312                 .owner = THIS_MODULE,
313                 .pm = &snd_soc_pm_ops,
314                 .of_match_table = imx_wm8962_dt_ids,
315         },
316         .probe = imx_wm8962_probe,
317         .remove = imx_wm8962_remove,
318 };
319 module_platform_driver(imx_wm8962_driver);
320 
321 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
322 MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
323 MODULE_LICENSE("GPL v2");
324 MODULE_ALIAS("platform:imx-wm8962");
325 

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