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1 /*
2  * snappercl15.c -- SoC audio for Bluewater Systems Snapper CL15 module
3  *
4  * Copyright (C) 2008 Bluewater Systems Ltd
5  * Author: Ryan Mallon
6  *
7  *  This program is free software; you can redistribute  it and/or modify it
8  *  under  the terms of  the GNU General  Public License as published by the
9  *  Free Software Foundation;  either version 2 of the  License, or (at your
10  *  option) any later version.
11  *
12  */
13
14 #include <linux/platform_device.h>
15 #include <linux/module.h>
16 #include <sound/core.h>
17 #include <sound/pcm.h>
18 #include <sound/soc.h>
19
20 #include <asm/mach-types.h>
21 #include <mach/hardware.h>
22
23 #include "../codecs/tlv320aic23.h"
24 #include "ep93xx-pcm.h"
25
26 #define CODEC_CLOCK 5644800
27
28 static int snappercl15_hw_params(struct snd_pcm_substream *substream,
29                                  struct snd_pcm_hw_params *params)
30 {
31         struct snd_soc_pcm_runtime *rtd = substream->private_data;
32         struct snd_soc_dai *codec_dai = rtd->codec_dai;
33         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
34         int err;
35
36         err = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
37                                   SND_SOC_DAIFMT_NB_IF |
38                                   SND_SOC_DAIFMT_CBS_CFS);
39
40         err = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | 
41                                   SND_SOC_DAIFMT_NB_IF |                  
42                                   SND_SOC_DAIFMT_CBS_CFS);
43         if (err)
44                 return err;
45
46         err = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, 
47                                      SND_SOC_CLOCK_IN);
48         if (err)
49                 return err;
50
51         err = snd_soc_dai_set_sysclk(cpu_dai, 0, CODEC_CLOCK, 
52                                      SND_SOC_CLOCK_OUT);
53         if (err)
54                 return err;
55
56         return 0;
57 }
58
59 static struct snd_soc_ops snappercl15_ops = {
60         .hw_params      = snappercl15_hw_params,
61 };
62
63 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
64         SND_SOC_DAPM_HP("Headphone Jack", NULL),
65         SND_SOC_DAPM_LINE("Line In", NULL),
66         SND_SOC_DAPM_MIC("Mic Jack", NULL),
67 };
68
69 static const struct snd_soc_dapm_route audio_map[] = {
70         {"Headphone Jack", NULL, "LHPOUT"},
71         {"Headphone Jack", NULL, "RHPOUT"},
72
73         {"LLINEIN", NULL, "Line In"},
74         {"RLINEIN", NULL, "Line In"},
75
76         {"MICIN", NULL, "Mic Jack"},
77 };
78
79 static int snappercl15_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
80 {
81         struct snd_soc_codec *codec = rtd->codec;
82         struct snd_soc_dapm_context *dapm = &codec->dapm;
83
84         snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
85                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
86
87         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
88         return 0;
89 }
90
91 static struct snd_soc_dai_link snappercl15_dai = {
92         .name           = "tlv320aic23",
93         .stream_name    = "AIC23",
94         .cpu_dai_name   = "ep93xx-i2s",
95         .codec_dai_name = "tlv320aic23-hifi",
96         .codec_name     = "tlv320aic23-codec.0-001a",
97         .platform_name  =  "ep93xx-pcm-audio",
98         .init           = snappercl15_tlv320aic23_init,
99         .ops            = &snappercl15_ops,
100 };
101
102 static struct snd_soc_card snd_soc_snappercl15 = {
103         .name           = "Snapper CL15",
104         .dai_link       = &snappercl15_dai,
105         .num_links      = 1,
106 };
107
108 static int __devinit snappercl15_probe(struct platform_device *pdev)
109 {
110         struct snd_soc_card *card = &snd_soc_snappercl15;
111         int ret;
112
113         ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
114                                  EP93XX_SYSCON_I2SCLKDIV_ORIDE |
115                                  EP93XX_SYSCON_I2SCLKDIV_SPOL);
116         if (ret)
117                 return ret;
118
119         card->dev = &pdev->dev;
120
121         ret = snd_soc_register_card(card);
122         if (ret) {
123                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
124                         ret);
125                 ep93xx_i2s_release();
126         }
127
128         return ret;
129 }
130
131 static int __devexit snappercl15_remove(struct platform_device *pdev)
132 {
133         struct snd_soc_card *card = platform_get_drvdata(pdev);
134
135         snd_soc_unregister_card(card);
136         ep93xx_i2s_release();
137
138         return 0;
139 }
140
141 static struct platform_driver snappercl15_driver = {
142         .driver         = {
143                 .name   = "snappercl15-audio",
144                 .owner  = THIS_MODULE,
145         },
146         .probe          = snappercl15_probe,
147         .remove         = __devexit_p(snappercl15_remove),
148 };
149
150 module_platform_driver(snappercl15_driver);
151
152 MODULE_AUTHOR("Ryan Mallon");
153 MODULE_DESCRIPTION("ALSA SoC Snapper CL15");
154 MODULE_LICENSE("GPL");
155 MODULE_ALIAS("platform:snappercl15-audio");