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(tlv320aic23_mclk);
30}
31
32static void osk_shutdown(struct snd_pcm_substream *substream)
33{
34	clk_disable_unprepare(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(codec_dai, 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_CBM_CFM,
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("soc-audio", -1);
119	if (!osk_snd_device)
120		return -ENOMEM;
121
122	platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
123	err = platform_device_add(osk_snd_device);
124	if (err)
125		goto err1;
126
127	dev = &osk_snd_device->dev;
128
129	tlv320aic23_mclk = clk_get(dev, "mclk");
130	if (IS_ERR(tlv320aic23_mclk)) {
131		printk(KERN_ERR "Could not get mclk clock\n");
132		err = PTR_ERR(tlv320aic23_mclk);
133		goto err2;
134	}
135
136	/*
137	 * Configure 12 MHz output on MCLK.
138	 */
139	curRate = (uint) clk_get_rate(tlv320aic23_mclk);
140	if (curRate != CODEC_CLOCK) {
141		if (clk_set_rate(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(tlv320aic23_mclk);
155err2:
156	platform_device_del(osk_snd_device);
157err1:
158	platform_device_put(osk_snd_device);
159
160	return err;
161
162}
163
164static void __exit osk_soc_exit(void)
165{
166	clk_put(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