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
imx_hifi_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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
imx_wm8962_set_bias_level(struct snd_soc_card * card,struct snd_soc_dapm_context * dapm,enum snd_soc_bias_level level)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
imx_wm8962_late_probe(struct snd_soc_card * card)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
imx_wm8962_probe(struct platform_device * pdev)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 ret = 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
imx_wm8962_remove(struct platform_device * pdev)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