3fd76bc391de19a2431dd320d0abfbdcd9616cf5
[linux-drm-fsl-dcu.git] / 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 = platform_get_drvdata(priv->pdev);
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 = platform_get_drvdata(priv->pdev);
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         ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
268         if (ret) {
269                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
270                 goto clk_fail;
271         }
272
273         platform_set_drvdata(pdev, data);
274         of_node_put(ssi_np);
275         of_node_put(codec_np);
276
277         return 0;
278
279 clk_fail:
280         clk_disable_unprepare(data->codec_clk);
281 fail:
282         if (ssi_np)
283                 of_node_put(ssi_np);
284         if (codec_np)
285                 of_node_put(codec_np);
286
287         return ret;
288 }
289
290 static int imx_wm8962_remove(struct platform_device *pdev)
291 {
292         struct imx_wm8962_data *data = platform_get_drvdata(pdev);
293
294         if (!IS_ERR(data->codec_clk))
295                 clk_disable_unprepare(data->codec_clk);
296
297         return 0;
298 }
299
300 static const struct of_device_id imx_wm8962_dt_ids[] = {
301         { .compatible = "fsl,imx-audio-wm8962", },
302         { /* sentinel */ }
303 };
304 MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
305
306 static struct platform_driver imx_wm8962_driver = {
307         .driver = {
308                 .name = "imx-wm8962",
309                 .owner = THIS_MODULE,
310                 .pm = &snd_soc_pm_ops,
311                 .of_match_table = imx_wm8962_dt_ids,
312         },
313         .probe = imx_wm8962_probe,
314         .remove = imx_wm8962_remove,
315 };
316 module_platform_driver(imx_wm8962_driver);
317
318 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
319 MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
320 MODULE_LICENSE("GPL v2");
321 MODULE_ALIAS("platform:imx-wm8962");