1 /*
2 * Copyright 2011 Freescale Semiconductor, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <linux/of.h>
22 #include <linux/of_device.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/soc.h>
26 #include <sound/jack.h>
27 #include <sound/soc-dapm.h>
28
29 #include "../codecs/sgtl5000.h"
30 #include "mxs-saif.h"
31
32 static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
33 struct snd_pcm_hw_params *params)
34 {
35 struct snd_soc_pcm_runtime *rtd = substream->private_data;
36 struct snd_soc_dai *codec_dai = rtd->codec_dai;
37 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
38 unsigned int rate = params_rate(params);
39 u32 mclk;
40 int ret;
41
42 /* sgtl5000 does not support 512*rate when in 96000 fs */
43 switch (rate) {
44 case 96000:
45 mclk = 256 * rate;
46 break;
47 default:
48 mclk = 512 * rate;
49 break;
50 }
51
52 /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
53 ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
54 if (ret) {
55 dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
56 mclk / 1000000, mclk / 1000 % 1000);
57 return ret;
58 }
59
60 /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
61 ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
62 if (ret) {
63 dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n",
64 mclk / 1000000, mclk / 1000 % 1000);
65 return ret;
66 }
67
68 return 0;
69 }
70
71 static const struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
72 .hw_params = mxs_sgtl5000_hw_params,
73 };
74
75 #define MXS_SGTL5000_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
76 SND_SOC_DAIFMT_CBS_CFS)
77
78 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
79 {
80 .name = "HiFi Tx",
81 .stream_name = "HiFi Playback",
82 .codec_dai_name = "sgtl5000",
83 .dai_fmt = MXS_SGTL5000_DAI_FMT,
84 .ops = &mxs_sgtl5000_hifi_ops,
85 .playback_only = true,
86 }, {
87 .name = "HiFi Rx",
88 .stream_name = "HiFi Capture",
89 .codec_dai_name = "sgtl5000",
90 .dai_fmt = MXS_SGTL5000_DAI_FMT,
91 .ops = &mxs_sgtl5000_hifi_ops,
92 .capture_only = true,
93 },
94 };
95
96 static struct snd_soc_card mxs_sgtl5000 = {
97 .name = "mxs_sgtl5000",
98 .owner = THIS_MODULE,
99 .dai_link = mxs_sgtl5000_dai,
100 .num_links = ARRAY_SIZE(mxs_sgtl5000_dai),
101 };
102
103 static int mxs_sgtl5000_probe(struct platform_device *pdev)
104 {
105 struct snd_soc_card *card = &mxs_sgtl5000;
106 int ret, i;
107 struct device_node *np = pdev->dev.of_node;
108 struct device_node *saif_np[2], *codec_np;
109
110 saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
111 saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
112 codec_np = of_parse_phandle(np, "audio-codec", 0);
113 if (!saif_np[0] || !saif_np[1] || !codec_np) {
114 dev_err(&pdev->dev, "phandle missing or invalid\n");
115 return -EINVAL;
116 }
117
118 for (i = 0; i < 2; i++) {
119 mxs_sgtl5000_dai[i].codec_name = NULL;
120 mxs_sgtl5000_dai[i].codec_of_node = codec_np;
121 mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
122 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i];
123 mxs_sgtl5000_dai[i].platform_name = NULL;
124 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
125 }
126
127 of_node_put(codec_np);
128 of_node_put(saif_np[0]);
129 of_node_put(saif_np[1]);
130
131 /*
132 * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
133 * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
134 * should be >= 8MHz and <= 27M.
135 */
136 ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
137 if (ret) {
138 dev_err(&pdev->dev, "failed to get mclk\n");
139 return ret;
140 }
141
142 card->dev = &pdev->dev;
143 platform_set_drvdata(pdev, card);
144
145 ret = devm_snd_soc_register_card(&pdev->dev, card);
146 if (ret) {
147 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
148 ret);
149 return ret;
150 }
151
152 return 0;
153 }
154
155 static int mxs_sgtl5000_remove(struct platform_device *pdev)
156 {
157 mxs_saif_put_mclk(0);
158
159 return 0;
160 }
161
162 static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
163 { .compatible = "fsl,mxs-audio-sgtl5000", },
164 { /* sentinel */ }
165 };
166 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
167
168 static struct platform_driver mxs_sgtl5000_audio_driver = {
169 .driver = {
170 .name = "mxs-sgtl5000",
171 .of_match_table = mxs_sgtl5000_dt_ids,
172 },
173 .probe = mxs_sgtl5000_probe,
174 .remove = mxs_sgtl5000_remove,
175 };
176
177 module_platform_driver(mxs_sgtl5000_audio_driver);
178
179 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
180 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
181 MODULE_LICENSE("GPL");
182 MODULE_ALIAS("platform:mxs-sgtl5000");
183
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