1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * osk5912.c -- SoC audio for OSK 5912
4 *
5 * Copyright (C) 2008 Mistral Solutions
6 *
7 * Contact: Arun KS <arunks@mistralsolutions.com>
8 */
9
10#include <linux/clk.h>
11#include <linux/platform_device.h>
12#include <sound/core.h>
13#include <sound/pcm.h>
14#include <sound/soc.h>
15
16#include <asm/mach-types.h>
17#include <linux/module.h>
18#include <linux/platform_data/asoc-ti-mcbsp.h>
19
20#include "omap-mcbsp.h"
21#include "../codecs/tlv320aic23.h"
22
23#define CODEC_CLOCK 12000000
24
25static struct clk *tlv320aic23_mclk;
26
27static int osk_startup(struct snd_pcm_substream *substream)
28{
29 return clk_prepare_enable(clk: tlv320aic23_mclk);
30}
31
32static void osk_shutdown(struct snd_pcm_substream *substream)
33{
34 clk_disable_unprepare(clk: tlv320aic23_mclk);
35}
36
37static int osk_hw_params(struct snd_pcm_substream *substream,
38 struct snd_pcm_hw_params *params)
39{
40 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
41 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
42 int err;
43
44 /* Set the codec system clock for DAC and ADC */
45 err =
46 snd_soc_dai_set_sysclk(dai: codec_dai, clk_id: 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
47
48 if (err < 0) {
49 printk(KERN_ERR "can't set codec system clock\n");
50 return err;
51 }
52
53 return err;
54}
55
56static const struct snd_soc_ops osk_ops = {
57 .startup = osk_startup,
58 .hw_params = osk_hw_params,
59 .shutdown = osk_shutdown,
60};
61
62static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
63 SND_SOC_DAPM_HP("Headphone Jack", NULL),
64 SND_SOC_DAPM_LINE("Line In", NULL),
65 SND_SOC_DAPM_MIC("Mic Jack", NULL),
66};
67
68static const struct snd_soc_dapm_route audio_map[] = {
69 {"Headphone Jack", NULL, "LHPOUT"},
70 {"Headphone Jack", NULL, "RHPOUT"},
71
72 {"LLINEIN", NULL, "Line In"},
73 {"RLINEIN", NULL, "Line In"},
74
75 {"MICIN", NULL, "Mic Jack"},
76};
77
78/* Digital audio interface glue - connects codec <--> CPU */
79SND_SOC_DAILINK_DEFS(aic23,
80 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.1")),
81 DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic23-codec",
82 "tlv320aic23-hifi")),
83 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.1")));
84
85static struct snd_soc_dai_link osk_dai = {
86 .name = "TLV320AIC23",
87 .stream_name = "AIC23",
88 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
89 SND_SOC_DAIFMT_CBP_CFP,
90 .ops = &osk_ops,
91 SND_SOC_DAILINK_REG(aic23),
92};
93
94/* Audio machine driver */
95static struct snd_soc_card snd_soc_card_osk = {
96 .name = "OSK5912",
97 .owner = THIS_MODULE,
98 .dai_link = &osk_dai,
99 .num_links = 1,
100
101 .dapm_widgets = tlv320aic23_dapm_widgets,
102 .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
103 .dapm_routes = audio_map,
104 .num_dapm_routes = ARRAY_SIZE(audio_map),
105};
106
107static struct platform_device *osk_snd_device;
108
109static int __init osk_soc_init(void)
110{
111 int err;
112 u32 curRate;
113 struct device *dev;
114
115 if (!(machine_is_omap_osk()))
116 return -ENODEV;
117
118 osk_snd_device = platform_device_alloc(name: "soc-audio", id: -1);
119 if (!osk_snd_device)
120 return -ENOMEM;
121
122 platform_set_drvdata(pdev: osk_snd_device, data: &snd_soc_card_osk);
123 err = platform_device_add(pdev: osk_snd_device);
124 if (err)
125 goto err1;
126
127 dev = &osk_snd_device->dev;
128
129 tlv320aic23_mclk = clk_get(dev, id: "mclk");
130 if (IS_ERR(ptr: tlv320aic23_mclk)) {
131 printk(KERN_ERR "Could not get mclk clock\n");
132 err = PTR_ERR(ptr: tlv320aic23_mclk);
133 goto err2;
134 }
135
136 /*
137 * Configure 12 MHz output on MCLK.
138 */
139 curRate = (uint) clk_get_rate(clk: tlv320aic23_mclk);
140 if (curRate != CODEC_CLOCK) {
141 if (clk_set_rate(clk: tlv320aic23_mclk, CODEC_CLOCK)) {
142 printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
143 err = -ECANCELED;
144 goto err3;
145 }
146 }
147
148 printk(KERN_INFO "MCLK = %d [%d]\n",
149 (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
150
151 return 0;
152
153err3:
154 clk_put(clk: tlv320aic23_mclk);
155err2:
156 platform_device_del(pdev: osk_snd_device);
157err1:
158 platform_device_put(pdev: osk_snd_device);
159
160 return err;
161
162}
163
164static void __exit osk_soc_exit(void)
165{
166 clk_put(clk: tlv320aic23_mclk);
167 platform_device_unregister(osk_snd_device);
168}
169
170module_init(osk_soc_init);
171module_exit(osk_soc_exit);
172
173MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
174MODULE_DESCRIPTION("ALSA SoC OSK 5912");
175MODULE_LICENSE("GPL");
176

source code of linux/sound/soc/ti/osk5912.c