aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/sound/soc/samsung/s3c24xx_uda134x.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/samsung/s3c24xx_uda134x.c')
-rw-r--r--sound/soc/samsung/s3c24xx_uda134x.c257
1 files changed, 0 insertions, 257 deletions
diff --git a/sound/soc/samsung/s3c24xx_uda134x.c b/sound/soc/samsung/s3c24xx_uda134x.c
deleted file mode 100644
index 6272070dcd92..000000000000
--- a/sound/soc/samsung/s3c24xx_uda134x.c
+++ /dev/null
@@ -1,257 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-//
-// Modifications by Christian Pellegrin <chripell@evolware.org>
-//
-// s3c24xx_uda134x.c - S3C24XX_UDA134X ALSA SoC Audio board driver
-//
-// Copyright 2007 Dension Audio Systems Ltd.
-// Author: Zoltan Devai
-
-#include <linux/clk.h>
-#include <linux/gpio.h>
-#include <linux/module.h>
-
-#include <sound/soc.h>
-#include <sound/s3c24xx_uda134x.h>
-
-#include "regs-iis.h"
-#include "s3c24xx-i2s.h"
-
-struct s3c24xx_uda134x {
- struct clk *xtal;
- struct clk *pclk;
- struct mutex clk_lock;
- int clk_users;
-};
-
-/* #define ENFORCE_RATES 1 */
-/*
- Unfortunately the S3C24XX in master mode has a limited capacity of
- generating the clock for the codec. If you define this only rates
- that are really available will be enforced. But be careful, most
- user level application just want the usual sampling frequencies (8,
- 11.025, 22.050, 44.1 kHz) and anyway resampling is a costly
- operation for embedded systems. So if you aren't very lucky or your
- hardware engineer wasn't very forward-looking it's better to leave
- this undefined. If you do so an approximate value for the requested
- sampling rate in the range -/+ 5% will be chosen. If this in not
- possible an error will be returned.
-*/
-
-static unsigned int rates[33 * 2];
-#ifdef ENFORCE_RATES
-static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
- .count = ARRAY_SIZE(rates),
- .list = rates,
- .mask = 0,
-};
-#endif
-
-static int s3c24xx_uda134x_startup(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
- struct s3c24xx_uda134x *priv = snd_soc_card_get_drvdata(rtd->card);
- struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
- int ret = 0;
-
- mutex_lock(&priv->clk_lock);
-
- if (priv->clk_users == 0) {
- priv->xtal = clk_get(rtd->dev, "xtal");
- if (IS_ERR(priv->xtal)) {
- dev_err(rtd->dev, "%s cannot get xtal\n", __func__);
- ret = PTR_ERR(priv->xtal);
- } else {
- priv->pclk = clk_get(cpu_dai->dev, "iis");
- if (IS_ERR(priv->pclk)) {
- dev_err(rtd->dev, "%s cannot get pclk\n",
- __func__);
- clk_put(priv->xtal);
- ret = PTR_ERR(priv->pclk);
- }
- }
- if (!ret) {
- int i, j;
-
- for (i = 0; i < 2; i++) {
- int fs = i ? 256 : 384;
-
- rates[i*33] = clk_get_rate(priv->xtal) / fs;
- for (j = 1; j < 33; j++)
- rates[i*33 + j] = clk_get_rate(priv->pclk) /
- (j * fs);
- }
- }
- }
- priv->clk_users += 1;
- mutex_unlock(&priv->clk_lock);
-
- if (!ret) {
-#ifdef ENFORCE_RATES
- ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
- SNDRV_PCM_HW_PARAM_RATE,
- &hw_constraints_rates);
- if (ret < 0)
- dev_err(rtd->dev, "%s cannot set constraints\n",
- __func__);
-#endif
- }
- return ret;
-}
-
-static void s3c24xx_uda134x_shutdown(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
- struct s3c24xx_uda134x *priv = snd_soc_card_get_drvdata(rtd->card);
-
- mutex_lock(&priv->clk_lock);
- priv->clk_users -= 1;
- if (priv->clk_users == 0) {
- clk_put(priv->xtal);
- priv->xtal = NULL;
- clk_put(priv->pclk);
- priv->pclk = NULL;
- }
- mutex_unlock(&priv->clk_lock);
-}
-
-static int s3c24xx_uda134x_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
- struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
- struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
- unsigned int clk = 0;
- int ret = 0;
- int clk_source, fs_mode;
- unsigned long rate = params_rate(params);
- long err, cerr;
- unsigned int div;
- int i, bi;
-
- err = 999999;
- bi = 0;
- for (i = 0; i < 2*33; i++) {
- cerr = rates[i] - rate;
- if (cerr < 0)
- cerr = -cerr;
- if (cerr < err) {
- err = cerr;
- bi = i;
- }
- }
- if (bi / 33 == 1)
- fs_mode = S3C2410_IISMOD_256FS;
- else
- fs_mode = S3C2410_IISMOD_384FS;
- if (bi % 33 == 0) {
- clk_source = S3C24XX_CLKSRC_MPLL;
- div = 1;
- } else {
- clk_source = S3C24XX_CLKSRC_PCLK;
- div = bi % 33;
- }
-
- dev_dbg(rtd->dev, "%s desired rate %lu, %d\n", __func__, rate, bi);
-
- clk = (fs_mode == S3C2410_IISMOD_384FS ? 384 : 256) * rate;
-
- dev_dbg(rtd->dev, "%s will use: %s %s %d sysclk %d err %ld\n", __func__,
- fs_mode == S3C2410_IISMOD_384FS ? "384FS" : "256FS",
- clk_source == S3C24XX_CLKSRC_MPLL ? "MPLLin" : "PCLK",
- div, clk, err);
-
- if ((err * 100 / rate) > 5) {
- dev_err(rtd->dev, "effective frequency too different "
- "from desired (%ld%%)\n", err * 100 / rate);
- return -EINVAL;
- }
-
- ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source , clk,
- SND_SOC_CLOCK_IN);
- if (ret < 0)
- return ret;
-
- ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK, fs_mode);
- if (ret < 0)
- return ret;
-
- ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
- S3C2410_IISMOD_32FS);
- if (ret < 0)
- return ret;
-
- ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
- S3C24XX_PRESCALE(div, div));
- if (ret < 0)
- return ret;
-
- /* set the codec system clock for DAC and ADC */
- ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
- SND_SOC_CLOCK_OUT);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static const struct snd_soc_ops s3c24xx_uda134x_ops = {
- .startup = s3c24xx_uda134x_startup,
- .shutdown = s3c24xx_uda134x_shutdown,
- .hw_params = s3c24xx_uda134x_hw_params,
-};
-
-SND_SOC_DAILINK_DEFS(uda134x,
- DAILINK_COMP_ARRAY(COMP_CPU("s3c24xx-iis")),
- DAILINK_COMP_ARRAY(COMP_CODEC("uda134x-codec", "uda134x-hifi")),
- DAILINK_COMP_ARRAY(COMP_PLATFORM("s3c24xx-iis")));
-
-static struct snd_soc_dai_link s3c24xx_uda134x_dai_link = {
- .name = "UDA134X",
- .stream_name = "UDA134X",
- .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
- SND_SOC_DAIFMT_CBS_CFS,
- .ops = &s3c24xx_uda134x_ops,
- SND_SOC_DAILINK_REG(uda134x),
-};
-
-static struct snd_soc_card snd_soc_s3c24xx_uda134x = {
- .name = "S3C24XX_UDA134X",
- .owner = THIS_MODULE,
- .dai_link = &s3c24xx_uda134x_dai_link,
- .num_links = 1,
-};
-
-static int s3c24xx_uda134x_probe(struct platform_device *pdev)
-{
- struct snd_soc_card *card = &snd_soc_s3c24xx_uda134x;
- struct s3c24xx_uda134x *priv;
- int ret;
-
- priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- mutex_init(&priv->clk_lock);
-
- card->dev = &pdev->dev;
- snd_soc_card_set_drvdata(card, priv);
-
- ret = devm_snd_soc_register_card(&pdev->dev, card);
- if (ret)
- dev_err(&pdev->dev, "failed to register card: %d\n", ret);
-
- return ret;
-}
-
-static struct platform_driver s3c24xx_uda134x_driver = {
- .probe = s3c24xx_uda134x_probe,
- .driver = {
- .name = "s3c24xx_uda134x",
- },
-};
-module_platform_driver(s3c24xx_uda134x_driver);
-
-MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
-MODULE_DESCRIPTION("S3C24XX_UDA134X ALSA SoC audio driver");
-MODULE_LICENSE("GPL");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.