soc/ti/osk5912.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * osk5912.c  --  SoC audio for OSK 5912
0004  *
0005  * Copyright (C) 2008 Mistral Solutions
0006  *
0007  * Contact: Arun KS  <arunks@mistralsolutions.com>
0008  */
0009
0010 #include <linux/clk.h>
0011 #include <linux/platform_device.h>
0012 #include <sound/core.h>
0013 #include <sound/pcm.h>
0014 #include <sound/soc.h>
0015
0016 #include <asm/mach-types.h>
0017 #include <linux/gpio.h>
0018 #include <linux/module.h>
0019 #include <linux/platform_data/asoc-ti-mcbsp.h>
0020
0021 #include "omap-mcbsp.h"
0022 #include "../codecs/tlv320aic23.h"
0023
0024 #define CODEC_CLOCK     12000000
0025
0026 static struct clk *tlv320aic23_mclk;
0027
0028 static int osk_startup(struct snd_pcm_substream *substream)
0029 {
0030     return clk_prepare_enable(tlv320aic23_mclk);
0031 }
0032
0033 static void osk_shutdown(struct snd_pcm_substream *substream)
0034 {
0035     clk_disable_unprepare(tlv320aic23_mclk);
0036 }
0037
0038 static int osk_hw_params(struct snd_pcm_substream *substream,
0039              struct snd_pcm_hw_params *params)
0040 {
0041     struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
0042     struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
0043     int err;
0044
0045     /* Set the codec system clock for DAC and ADC */
0046     err =
0047         snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
0048
0049     if (err < 0) {
0050         printk(KERN_ERR "can't set codec system clock\n");
0051         return err;
0052     }
0053
0054     return err;
0055 }
0056
0057 static const struct snd_soc_ops osk_ops = {
0058     .startup = osk_startup,
0059     .hw_params = osk_hw_params,
0060     .shutdown = osk_shutdown,
0061 };
0062
0063 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
0064     SND_SOC_DAPM_HP("Headphone Jack", NULL),
0065     SND_SOC_DAPM_LINE("Line In", NULL),
0066     SND_SOC_DAPM_MIC("Mic Jack", NULL),
0067 };
0068
0069 static const struct snd_soc_dapm_route audio_map[] = {
0070     {"Headphone Jack", NULL, "LHPOUT"},
0071     {"Headphone Jack", NULL, "RHPOUT"},
0072
0073     {"LLINEIN", NULL, "Line In"},
0074     {"RLINEIN", NULL, "Line In"},
0075
0076     {"MICIN", NULL, "Mic Jack"},
0077 };
0078
0079 /* Digital audio interface glue - connects codec <--> CPU */
0080 SND_SOC_DAILINK_DEFS(aic23,
0081     DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.1")),
0082     DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic23-codec",
0083                       "tlv320aic23-hifi")),
0084     DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.1")));
0085
0086 static struct snd_soc_dai_link osk_dai = {
0087     .name = "TLV320AIC23",
0088     .stream_name = "AIC23",
0089     .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
0090            SND_SOC_DAIFMT_CBM_CFM,
0091     .ops = &osk_ops,
0092     SND_SOC_DAILINK_REG(aic23),
0093 };
0094
0095 /* Audio machine driver */
0096 static struct snd_soc_card snd_soc_card_osk = {
0097     .name = "OSK5912",
0098     .owner = THIS_MODULE,
0099     .dai_link = &osk_dai,
0100     .num_links = 1,
0101
0102     .dapm_widgets = tlv320aic23_dapm_widgets,
0103     .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
0104     .dapm_routes = audio_map,
0105     .num_dapm_routes = ARRAY_SIZE(audio_map),
0106 };
0107
0108 static struct platform_device *osk_snd_device;
0109
0110 static int __init osk_soc_init(void)
0111 {
0112     int err;
0113     u32 curRate;
0114     struct device *dev;
0115
0116     if (!(machine_is_omap_osk()))
0117         return -ENODEV;
0118
0119     osk_snd_device = platform_device_alloc("soc-audio", -1);
0120     if (!osk_snd_device)
0121         return -ENOMEM;
0122
0123     platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
0124     err = platform_device_add(osk_snd_device);
0125     if (err)
0126         goto err1;
0127
0128     dev = &osk_snd_device->dev;
0129
0130     tlv320aic23_mclk = clk_get(dev, "mclk");
0131     if (IS_ERR(tlv320aic23_mclk)) {
0132         printk(KERN_ERR "Could not get mclk clock\n");
0133         err = PTR_ERR(tlv320aic23_mclk);
0134         goto err2;
0135     }
0136
0137     /*
0138      * Configure 12 MHz output on MCLK.
0139      */
0140     curRate = (uint) clk_get_rate(tlv320aic23_mclk);
0141     if (curRate != CODEC_CLOCK) {
0142         if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
0143             printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
0144             err = -ECANCELED;
0145             goto err3;
0146         }
0147     }
0148
0149     printk(KERN_INFO "MCLK = %d [%d]\n",
0150            (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
0151
0152     return 0;
0153
0154 err3:
0155     clk_put(tlv320aic23_mclk);
0156 err2:
0157     platform_device_del(osk_snd_device);
0158 err1:
0159     platform_device_put(osk_snd_device);
0160
0161     return err;
0162
0163 }
0164
0165 static void __exit osk_soc_exit(void)
0166 {
0167     clk_put(tlv320aic23_mclk);
0168     platform_device_unregister(osk_snd_device);
0169 }
0170
0171 module_init(osk_soc_init);
0172 module_exit(osk_soc_exit);
0173
0174 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
0175 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
0176 MODULE_LICENSE("GPL");