cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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osk5912.c (4091B)

      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
     26static struct clk *tlv320aic23_mclk;
     27
     28static int osk_startup(struct snd_pcm_substream *substream)
     29{
     30	return clk_prepare_enable(tlv320aic23_mclk);
     31}
     32
     33static void osk_shutdown(struct snd_pcm_substream *substream)
     34{
     35	clk_disable_unprepare(tlv320aic23_mclk);
     36}
     37
     38static 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
     57static const struct snd_soc_ops osk_ops = {
     58	.startup = osk_startup,
     59	.hw_params = osk_hw_params,
     60	.shutdown = osk_shutdown,
     61};
     62
     63static 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
     69static 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 */
     80SND_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
     86static 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 */
     96static 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
    108static struct platform_device *osk_snd_device;
    109
    110static 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
    154err3:
    155	clk_put(tlv320aic23_mclk);
    156err2:
    157	platform_device_del(osk_snd_device);
    158err1:
    159	platform_device_put(osk_snd_device);
    160
    161	return err;
    162
    163}
    164
    165static void __exit osk_soc_exit(void)
    166{
    167	clk_put(tlv320aic23_mclk);
    168	platform_device_unregister(osk_snd_device);
    169}
    170
    171module_init(osk_soc_init);
    172module_exit(osk_soc_exit);
    173
    174MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
    175MODULE_DESCRIPTION("ALSA SoC OSK 5912");
    176MODULE_LICENSE("GPL");