1/*
2 * Copyright 2012 Freescale Semiconductor, Inc.
3 * Copyright 2012 Linaro Ltd.
4 *
5 * The code contained herein is licensed under the GNU General Public
6 * License. You may obtain a copy of the GNU General Public License
7 * Version 2 or later at the following locations:
8 *
9 * http://www.opensource.org/licenses/gpl-license.html
10 * http://www.gnu.org/copyleft/gpl.html
11 */
12
13#include <linux/gpio.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/of_platform.h>
17#include <linux/i2c.h>
18#include <linux/of_gpio.h>
19#include <sound/soc.h>
20#include <sound/jack.h>
21
22#include "imx-audmux.h"
23
24#define DAI_NAME_SIZE	32
25#define MUX_PORT_MAX	7
26
27struct imx_es8328_data {
28	struct device *dev;
29	struct snd_soc_dai_link dai;
30	struct snd_soc_card card;
31	char codec_dai_name[DAI_NAME_SIZE];
32	char platform_name[DAI_NAME_SIZE];
33	int jack_gpio;
34};
35
36static struct snd_soc_jack_gpio headset_jack_gpios[] = {
37	{
38		.gpio = -1,
39		.name = "headset-gpio",
40		.report = SND_JACK_HEADSET,
41		.invert = 0,
42		.debounce_time = 200,
43	},
44};
45
46static struct snd_soc_jack headset_jack;
47
48static int imx_es8328_dai_init(struct snd_soc_pcm_runtime *rtd)
49{
50	struct imx_es8328_data *data = container_of(rtd->card,
51					struct imx_es8328_data, card);
52	int ret = 0;
53
54	/* Headphone jack detection */
55	if (gpio_is_valid(data->jack_gpio)) {
56		ret = snd_soc_card_jack_new(rtd->card, "Headphone",
57					    SND_JACK_HEADPHONE | SND_JACK_BTN_0,
58					    &headset_jack, NULL, 0);
59		if (ret)
60			return ret;
61
62		headset_jack_gpios[0].gpio = data->jack_gpio;
63		ret = snd_soc_jack_add_gpios(&headset_jack,
64					     ARRAY_SIZE(headset_jack_gpios),
65					     headset_jack_gpios);
66	}
67
68	return ret;
69}
70
71static const struct snd_soc_dapm_widget imx_es8328_dapm_widgets[] = {
72	SND_SOC_DAPM_MIC("Mic Jack", NULL),
73	SND_SOC_DAPM_HP("Headphone", NULL),
74	SND_SOC_DAPM_SPK("Speaker", NULL),
75	SND_SOC_DAPM_REGULATOR_SUPPLY("audio-amp", 1, 0),
76};
77
78static int imx_es8328_probe(struct platform_device *pdev)
79{
80	struct device_node *np = pdev->dev.of_node;
81	struct device_node *ssi_np = NULL, *codec_np = NULL;
82	struct platform_device *ssi_pdev;
83	struct imx_es8328_data *data;
84	u32 int_port, ext_port;
85	int ret;
86	struct device *dev = &pdev->dev;
87
88	ret = of_property_read_u32(np, "mux-int-port", &int_port);
89	if (ret) {
90		dev_err(dev, "mux-int-port missing or invalid\n");
91		goto fail;
92	}
93	if (int_port > MUX_PORT_MAX || int_port == 0) {
94		dev_err(dev, "mux-int-port: hardware only has %d mux ports\n",
95			MUX_PORT_MAX);
96		goto fail;
97	}
98
99	ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
100	if (ret) {
101		dev_err(dev, "mux-ext-port missing or invalid\n");
102		goto fail;
103	}
104	if (ext_port > MUX_PORT_MAX || ext_port == 0) {
105		dev_err(dev, "mux-ext-port: hardware only has %d mux ports\n",
106			MUX_PORT_MAX);
107		ret = -EINVAL;
108		goto fail;
109	}
110
111	/*
112	 * The port numbering in the hardware manual starts at 1, while
113	 * the audmux API expects it starts at 0.
114	 */
115	int_port--;
116	ext_port--;
117	ret = imx_audmux_v2_configure_port(int_port,
118			IMX_AUDMUX_V2_PTCR_SYN |
119			IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
120			IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
121			IMX_AUDMUX_V2_PTCR_TFSDIR |
122			IMX_AUDMUX_V2_PTCR_TCLKDIR,
123			IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
124	if (ret) {
125		dev_err(dev, "audmux internal port setup failed\n");
126		return ret;
127	}
128	ret = imx_audmux_v2_configure_port(ext_port,
129			IMX_AUDMUX_V2_PTCR_SYN,
130			IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
131	if (ret) {
132		dev_err(dev, "audmux external port setup failed\n");
133		return ret;
134	}
135
136	ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
137	codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
138	if (!ssi_np || !codec_np) {
139		dev_err(dev, "phandle missing or invalid\n");
140		ret = -EINVAL;
141		goto fail;
142	}
143
144	ssi_pdev = of_find_device_by_node(ssi_np);
145	if (!ssi_pdev) {
146		dev_err(dev, "failed to find SSI platform device\n");
147		ret = -EINVAL;
148		goto fail;
149	}
150
151	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
152	if (!data) {
153		ret = -ENOMEM;
154		goto fail;
155	}
156
157	data->dev = dev;
158
159	data->jack_gpio = of_get_named_gpio(pdev->dev.of_node, "jack-gpio", 0);
160
161	data->dai.name = "hifi";
162	data->dai.stream_name = "hifi";
163	data->dai.codec_dai_name = "es8328-hifi-analog";
164	data->dai.codec_of_node = codec_np;
165	data->dai.cpu_of_node = ssi_np;
166	data->dai.platform_of_node = ssi_np;
167	data->dai.init = &imx_es8328_dai_init;
168	data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
169			    SND_SOC_DAIFMT_CBM_CFM;
170
171	data->card.dev = dev;
172	data->card.dapm_widgets = imx_es8328_dapm_widgets;
173	data->card.num_dapm_widgets = ARRAY_SIZE(imx_es8328_dapm_widgets);
174	ret = snd_soc_of_parse_card_name(&data->card, "model");
175	if (ret) {
176		dev_err(dev, "Unable to parse card name\n");
177		goto fail;
178	}
179	ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
180	if (ret) {
181		dev_err(dev, "Unable to parse routing: %d\n", ret);
182		goto fail;
183	}
184	data->card.num_links = 1;
185	data->card.owner = THIS_MODULE;
186	data->card.dai_link = &data->dai;
187
188	ret = snd_soc_register_card(&data->card);
189	if (ret) {
190		dev_err(dev, "Unable to register: %d\n", ret);
191		goto fail;
192	}
193
194	platform_set_drvdata(pdev, data);
195fail:
196	of_node_put(ssi_np);
197	of_node_put(codec_np);
198
199	return ret;
200}
201
202static int imx_es8328_remove(struct platform_device *pdev)
203{
204	struct imx_es8328_data *data = platform_get_drvdata(pdev);
205
206	snd_soc_jack_free_gpios(&headset_jack, ARRAY_SIZE(headset_jack_gpios),
207				headset_jack_gpios);
208
209	snd_soc_unregister_card(&data->card);
210
211	return 0;
212}
213
214static const struct of_device_id imx_es8328_dt_ids[] = {
215	{ .compatible = "fsl,imx-audio-es8328", },
216	{ /* sentinel */ }
217};
218MODULE_DEVICE_TABLE(of, imx_es8328_dt_ids);
219
220static struct platform_driver imx_es8328_driver = {
221	.driver = {
222		.name = "imx-es8328",
223		.of_match_table = imx_es8328_dt_ids,
224	},
225	.probe = imx_es8328_probe,
226	.remove = imx_es8328_remove,
227};
228module_platform_driver(imx_es8328_driver);
229
230MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>");
231MODULE_DESCRIPTION("Kosagi i.MX6 ES8328 ASoC machine driver");
232MODULE_LICENSE("GPL v2");
233MODULE_ALIAS("platform:imx-audio-es8328");
234