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
25 struct 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
imx_sgtl5000_dai_init(struct snd_soc_pcm_runtime * rtd)34 static 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
50 static 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
imx_sgtl5000_probe(struct platform_device * pdev)58 static 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 put_device(&ssi_pdev->dev);
119 codec_dev = of_find_i2c_device_by_node(codec_np);
120 if (!codec_dev) {
121 dev_err(&pdev->dev, "failed to find codec platform device\n");
122 ret = -EPROBE_DEFER;
123 goto fail;
124 }
125
126 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
127 if (!data) {
128 ret = -ENOMEM;
129 goto fail;
130 }
131
132 data->codec_clk = clk_get(&codec_dev->dev, NULL);
133 if (IS_ERR(data->codec_clk)) {
134 ret = PTR_ERR(data->codec_clk);
135 goto fail;
136 }
137
138 data->clk_frequency = clk_get_rate(data->codec_clk);
139
140 data->dai.name = "HiFi";
141 data->dai.stream_name = "HiFi";
142 data->dai.codec_dai_name = "sgtl5000";
143 data->dai.codec_of_node = codec_np;
144 data->dai.cpu_of_node = ssi_np;
145 data->dai.platform_of_node = ssi_np;
146 data->dai.init = &imx_sgtl5000_dai_init;
147 data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
148 SND_SOC_DAIFMT_CBM_CFM;
149
150 data->card.dev = &pdev->dev;
151 ret = snd_soc_of_parse_card_name(&data->card, "model");
152 if (ret)
153 goto fail;
154 ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
155 if (ret)
156 goto fail;
157 data->card.num_links = 1;
158 data->card.owner = THIS_MODULE;
159 data->card.dai_link = &data->dai;
160 data->card.dapm_widgets = imx_sgtl5000_dapm_widgets;
161 data->card.num_dapm_widgets = ARRAY_SIZE(imx_sgtl5000_dapm_widgets);
162
163 platform_set_drvdata(pdev, &data->card);
164 snd_soc_card_set_drvdata(&data->card, data);
165
166 ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
167 if (ret) {
168 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
169 goto fail;
170 }
171
172 of_node_put(ssi_np);
173 of_node_put(codec_np);
174
175 return 0;
176
177 fail:
178 if (data && !IS_ERR(data->codec_clk))
179 clk_put(data->codec_clk);
180 of_node_put(ssi_np);
181 of_node_put(codec_np);
182
183 return ret;
184 }
185
imx_sgtl5000_remove(struct platform_device * pdev)186 static int imx_sgtl5000_remove(struct platform_device *pdev)
187 {
188 struct snd_soc_card *card = platform_get_drvdata(pdev);
189 struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(card);
190
191 clk_put(data->codec_clk);
192
193 return 0;
194 }
195
196 static const struct of_device_id imx_sgtl5000_dt_ids[] = {
197 { .compatible = "fsl,imx-audio-sgtl5000", },
198 { /* sentinel */ }
199 };
200 MODULE_DEVICE_TABLE(of, imx_sgtl5000_dt_ids);
201
202 static struct platform_driver imx_sgtl5000_driver = {
203 .driver = {
204 .name = "imx-sgtl5000",
205 .pm = &snd_soc_pm_ops,
206 .of_match_table = imx_sgtl5000_dt_ids,
207 },
208 .probe = imx_sgtl5000_probe,
209 .remove = imx_sgtl5000_remove,
210 };
211 module_platform_driver(imx_sgtl5000_driver);
212
213 MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
214 MODULE_DESCRIPTION("Freescale i.MX SGTL5000 ASoC machine driver");
215 MODULE_LICENSE("GPL v2");
216 MODULE_ALIAS("platform:imx-sgtl5000");
217