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/module.h>
14#include <linux/of.h>
15#include <linux/of_platform.h>
16#include <linux/i2c.h>
17#include <linux/clk.h>
18#include <sound/soc.h>
19
20#include "../codecs/sgtl5000.h"
21#include "imx-audmux.h"
22
23#define DAI_NAME_SIZE	32
24
25struct imx_sgtl5000_data {
26	struct snd_soc_dai_link dai;
27	struct snd_soc_card card;
28	char codec_dai_name[DAI_NAME_SIZE];
29	char platform_name[DAI_NAME_SIZE];
30	struct clk *codec_clk;
31	unsigned int clk_frequency;
32};
33
34static int imx_sgtl5000_dai_init(struct snd_soc_pcm_runtime *rtd)
35{
36	struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(rtd->card);
37	struct device *dev = rtd->card->dev;
38	int ret;
39
40	ret = snd_soc_dai_set_sysclk(rtd->codec_dai, SGTL5000_SYSCLK,
41				     data->clk_frequency, SND_SOC_CLOCK_IN);
42	if (ret) {
43		dev_err(dev, "could not set codec driver clock params\n");
44		return ret;
45	}
46
47	return 0;
48}
49
50static const struct snd_soc_dapm_widget imx_sgtl5000_dapm_widgets[] = {
51	SND_SOC_DAPM_MIC("Mic Jack", NULL),
52	SND_SOC_DAPM_LINE("Line In Jack", NULL),
53	SND_SOC_DAPM_HP("Headphone Jack", NULL),
54	SND_SOC_DAPM_SPK("Line Out Jack", NULL),
55	SND_SOC_DAPM_SPK("Ext Spk", NULL),
56};
57
58static int imx_sgtl5000_probe(struct platform_device *pdev)
59{
60	struct device_node *np = pdev->dev.of_node;
61	struct device_node *ssi_np, *codec_np;
62	struct platform_device *ssi_pdev;
63	struct i2c_client *codec_dev;
64	struct imx_sgtl5000_data *data = NULL;
65	int int_port, ext_port;
66	int ret;
67
68	ret = of_property_read_u32(np, "mux-int-port", &int_port);
69	if (ret) {
70		dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
71		return ret;
72	}
73	ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
74	if (ret) {
75		dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
76		return ret;
77	}
78
79	/*
80	 * The port numbering in the hardware manual starts at 1, while
81	 * the audmux API expects it starts at 0.
82	 */
83	int_port--;
84	ext_port--;
85	ret = imx_audmux_v2_configure_port(int_port,
86			IMX_AUDMUX_V2_PTCR_SYN |
87			IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
88			IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
89			IMX_AUDMUX_V2_PTCR_TFSDIR |
90			IMX_AUDMUX_V2_PTCR_TCLKDIR,
91			IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
92	if (ret) {
93		dev_err(&pdev->dev, "audmux internal port setup failed\n");
94		return ret;
95	}
96	ret = imx_audmux_v2_configure_port(ext_port,
97			IMX_AUDMUX_V2_PTCR_SYN,
98			IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
99	if (ret) {
100		dev_err(&pdev->dev, "audmux external port setup failed\n");
101		return ret;
102	}
103
104	ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
105	codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
106	if (!ssi_np || !codec_np) {
107		dev_err(&pdev->dev, "phandle missing or invalid\n");
108		ret = -EINVAL;
109		goto fail;
110	}
111
112	ssi_pdev = of_find_device_by_node(ssi_np);
113	if (!ssi_pdev) {
114		dev_err(&pdev->dev, "failed to find SSI platform device\n");
115		ret = -EPROBE_DEFER;
116		goto fail;
117	}
118	codec_dev = of_find_i2c_device_by_node(codec_np);
119	if (!codec_dev) {
120		dev_err(&pdev->dev, "failed to find codec platform device\n");
121		return -EPROBE_DEFER;
122	}
123
124	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
125	if (!data) {
126		ret = -ENOMEM;
127		goto fail;
128	}
129
130	data->codec_clk = clk_get(&codec_dev->dev, NULL);
131	if (IS_ERR(data->codec_clk)) {
132		ret = PTR_ERR(data->codec_clk);
133		goto fail;
134	}
135
136	data->clk_frequency = clk_get_rate(data->codec_clk);
137
138	data->dai.name = "HiFi";
139	data->dai.stream_name = "HiFi";
140	data->dai.codec_dai_name = "sgtl5000";
141	data->dai.codec_of_node = codec_np;
142	data->dai.cpu_of_node = ssi_np;
143	data->dai.platform_of_node = ssi_np;
144	data->dai.init = &imx_sgtl5000_dai_init;
145	data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
146			    SND_SOC_DAIFMT_CBM_CFM;
147
148	data->card.dev = &pdev->dev;
149	ret = snd_soc_of_parse_card_name(&data->card, "model");
150	if (ret)
151		goto fail;
152	ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
153	if (ret)
154		goto fail;
155	data->card.num_links = 1;
156	data->card.owner = THIS_MODULE;
157	data->card.dai_link = &data->dai;
158	data->card.dapm_widgets = imx_sgtl5000_dapm_widgets;
159	data->card.num_dapm_widgets = ARRAY_SIZE(imx_sgtl5000_dapm_widgets);
160
161	platform_set_drvdata(pdev, &data->card);
162	snd_soc_card_set_drvdata(&data->card, data);
163
164	ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
165	if (ret) {
166		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
167		goto fail;
168	}
169
170	of_node_put(ssi_np);
171	of_node_put(codec_np);
172
173	return 0;
174
175fail:
176	if (data && !IS_ERR(data->codec_clk))
177		clk_put(data->codec_clk);
178	of_node_put(ssi_np);
179	of_node_put(codec_np);
180
181	return ret;
182}
183
184static int imx_sgtl5000_remove(struct platform_device *pdev)
185{
186	struct snd_soc_card *card = platform_get_drvdata(pdev);
187	struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(card);
188
189	clk_put(data->codec_clk);
190
191	return 0;
192}
193
194static const struct of_device_id imx_sgtl5000_dt_ids[] = {
195	{ .compatible = "fsl,imx-audio-sgtl5000", },
196	{ /* sentinel */ }
197};
198MODULE_DEVICE_TABLE(of, imx_sgtl5000_dt_ids);
199
200static struct platform_driver imx_sgtl5000_driver = {
201	.driver = {
202		.name = "imx-sgtl5000",
203		.pm = &snd_soc_pm_ops,
204		.of_match_table = imx_sgtl5000_dt_ids,
205	},
206	.probe = imx_sgtl5000_probe,
207	.remove = imx_sgtl5000_remove,
208};
209module_platform_driver(imx_sgtl5000_driver);
210
211MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
212MODULE_DESCRIPTION("Freescale i.MX SGTL5000 ASoC machine driver");
213MODULE_LICENSE("GPL v2");
214MODULE_ALIAS("platform:imx-sgtl5000");
215