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/gpio.h>
18 #include <linux/module.h>
19 #include <linux/platform_data/asoc-ti-mcbsp.h>
20
21 #include "omap-mcbsp.h"
22 #include "../codecs/tlv320aic23.h"
23
24 #define CODEC_CLOCK 12000000
25
26 static struct clk *tlv320aic23_mclk;
27
osk_startup(struct snd_pcm_substream * substream)28 static int osk_startup(struct snd_pcm_substream *substream)
29 {
30 return clk_prepare_enable(tlv320aic23_mclk);
31 }
32
osk_shutdown(struct snd_pcm_substream * substream)33 static void osk_shutdown(struct snd_pcm_substream *substream)
34 {
35 clk_disable_unprepare(tlv320aic23_mclk);
36 }
37
osk_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)38 static int osk_hw_params(struct snd_pcm_substream *substream,
39 struct snd_pcm_hw_params *params)
40 {
41 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
42 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
43 int err;
44
45 /* Set the codec system clock for DAC and ADC */
46 err =
47 snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
48
49 if (err < 0) {
50 printk(KERN_ERR "can't set codec system clock\n");
51 return err;
52 }
53
54 return err;
55 }
56
57 static const struct snd_soc_ops osk_ops = {
58 .startup = osk_startup,
59 .hw_params = osk_hw_params,
60 .shutdown = osk_shutdown,
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 /* Digital audio interface glue - connects codec <--> CPU */
80 SND_SOC_DAILINK_DEFS(aic23,
81 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.1")),
82 DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic23-codec",
83 "tlv320aic23-hifi")),
84 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.1")));
85
86 static struct snd_soc_dai_link osk_dai = {
87 .name = "TLV320AIC23",
88 .stream_name = "AIC23",
89 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
90 SND_SOC_DAIFMT_CBM_CFM,
91 .ops = &osk_ops,
92 SND_SOC_DAILINK_REG(aic23),
93 };
94
95 /* Audio machine driver */
96 static struct snd_soc_card snd_soc_card_osk = {
97 .name = "OSK5912",
98 .owner = THIS_MODULE,
99 .dai_link = &osk_dai,
100 .num_links = 1,
101
102 .dapm_widgets = tlv320aic23_dapm_widgets,
103 .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
104 .dapm_routes = audio_map,
105 .num_dapm_routes = ARRAY_SIZE(audio_map),
106 };
107
108 static struct platform_device *osk_snd_device;
109
osk_soc_init(void)110 static int __init osk_soc_init(void)
111 {
112 int err;
113 u32 curRate;
114 struct device *dev;
115
116 if (!(machine_is_omap_osk()))
117 return -ENODEV;
118
119 osk_snd_device = platform_device_alloc("soc-audio", -1);
120 if (!osk_snd_device)
121 return -ENOMEM;
122
123 platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
124 err = platform_device_add(osk_snd_device);
125 if (err)
126 goto err1;
127
128 dev = &osk_snd_device->dev;
129
130 tlv320aic23_mclk = clk_get(dev, "mclk");
131 if (IS_ERR(tlv320aic23_mclk)) {
132 printk(KERN_ERR "Could not get mclk clock\n");
133 err = PTR_ERR(tlv320aic23_mclk);
134 goto err2;
135 }
136
137 /*
138 * Configure 12 MHz output on MCLK.
139 */
140 curRate = (uint) clk_get_rate(tlv320aic23_mclk);
141 if (curRate != CODEC_CLOCK) {
142 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
143 printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
144 err = -ECANCELED;
145 goto err3;
146 }
147 }
148
149 printk(KERN_INFO "MCLK = %d [%d]\n",
150 (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
151
152 return 0;
153
154 err3:
155 clk_put(tlv320aic23_mclk);
156 err2:
157 platform_device_del(osk_snd_device);
158 err1:
159 platform_device_put(osk_snd_device);
160
161 return err;
162
163 }
164
osk_soc_exit(void)165 static void __exit osk_soc_exit(void)
166 {
167 clk_put(tlv320aic23_mclk);
168 platform_device_unregister(osk_snd_device);
169 }
170
171 module_init(osk_soc_init);
172 module_exit(osk_soc_exit);
173
174 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
175 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
176 MODULE_LICENSE("GPL");
177