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
31struct 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
40struct imx_priv {
41	struct platform_device *pdev;
42};
43static struct imx_priv card_priv;
44
45static 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
52static int sample_rate = 44100;
53static snd_pcm_format_t sample_format = SNDRV_PCM_FORMAT_S16_LE;
54
55static 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
64static struct snd_soc_ops imx_hifi_ops = {
65	.hw_params = imx_hifi_hw_params,
66};
67
68static 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
136static 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
152static 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.owner = THIS_MODULE;
261	data->card.dai_link = &data->dai;
262	data->card.dapm_widgets = imx_wm8962_dapm_widgets;
263	data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets);
264
265	data->card.late_probe = imx_wm8962_late_probe;
266	data->card.set_bias_level = imx_wm8962_set_bias_level;
267
268	platform_set_drvdata(pdev, &data->card);
269	snd_soc_card_set_drvdata(&data->card, data);
270
271	ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
272	if (ret) {
273		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
274		goto clk_fail;
275	}
276
277	of_node_put(ssi_np);
278	of_node_put(codec_np);
279
280	return 0;
281
282clk_fail:
283	clk_disable_unprepare(data->codec_clk);
284fail:
285	of_node_put(ssi_np);
286	of_node_put(codec_np);
287
288	return ret;
289}
290
291static int imx_wm8962_remove(struct platform_device *pdev)
292{
293	struct snd_soc_card *card = platform_get_drvdata(pdev);
294	struct imx_wm8962_data *data = snd_soc_card_get_drvdata(card);
295
296	if (!IS_ERR(data->codec_clk))
297		clk_disable_unprepare(data->codec_clk);
298
299	return 0;
300}
301
302static const struct of_device_id imx_wm8962_dt_ids[] = {
303	{ .compatible = "fsl,imx-audio-wm8962", },
304	{ /* sentinel */ }
305};
306MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids);
307
308static struct platform_driver imx_wm8962_driver = {
309	.driver = {
310		.name = "imx-wm8962",
311		.pm = &snd_soc_pm_ops,
312		.of_match_table = imx_wm8962_dt_ids,
313	},
314	.probe = imx_wm8962_probe,
315	.remove = imx_wm8962_remove,
316};
317module_platform_driver(imx_wm8962_driver);
318
319MODULE_AUTHOR("Freescale Semiconductor, Inc.");
320MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver");
321MODULE_LICENSE("GPL v2");
322MODULE_ALIAS("platform:imx-wm8962");
323