It registers hdmi-audio card to ALSA framework which associates i2s dai and
cdf based hdmi audio codec.
Signed-off-by: Rahul Sharma <rahul.sharma@xxxxxxxxxxx>
---
sound/soc/samsung/Kconfig | 8 ++
sound/soc/samsung/Makefile | 2 +
sound/soc/samsung/hdmi.c | 260 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 270 insertions(+)
create mode 100644 sound/soc/samsung/hdmi.c
diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig
index 90e7e66..d5b92ab 100644
--- a/sound/soc/samsung/Kconfig
+++ b/sound/soc/samsung/Kconfig
@@ -185,6 +185,14 @@ config SND_SOC_SMDK_WM8994_PCM
help
Say Y if you want to add support for SoC audio on the SMDK
+config SND_SOC_EXYNOS_HDMI_AUDIO
+ tristate "SoC I2S Audio support for HDMI"
+ depends on SND_SOC_SAMSUNG && DRM_EXYNOS_HDMI_CDF
+ select SND_SAMSUNG_I2S
+ select SND_SOC_EXYNOS_HDMI_CODEC
+ help
+ Say Y if you want to add support for hdmi audio on the Exynos.
+
config SND_SOC_SPEYSIDE
tristate "Audio support for Wolfson Speyside"
depends on SND_SOC_SAMSUNG && MACH_WLF_CRAGG_6410
diff --git a/sound/soc/samsung/Makefile b/sound/soc/samsung/Makefile
index 709f605..ab1c151 100644
--- a/sound/soc/samsung/Makefile
+++ b/sound/soc/samsung/Makefile
@@ -8,6 +8,7 @@ snd-soc-s3c-i2s-v2-objs := s3c-i2s-v2.o
snd-soc-samsung-spdif-objs := spdif.o
snd-soc-pcm-objs := pcm.o
snd-soc-i2s-objs := i2s.o
+snd-soc-hdmi-objs := hdmi.o
obj-$(CONFIG_SND_SOC_SAMSUNG) += snd-soc-s3c24xx.o
obj-$(CONFIG_SND_S3C24XX_I2S) += snd-soc-s3c24xx-i2s.o
@@ -18,6 +19,7 @@ obj-$(CONFIG_SND_SAMSUNG_SPDIF) += snd-soc-samsung-spdif.o
obj-$(CONFIG_SND_SAMSUNG_PCM) += snd-soc-pcm.o
obj-$(CONFIG_SND_SAMSUNG_I2S) += snd-soc-i2s.o
obj-$(CONFIG_SND_SAMSUNG_I2S) += snd-soc-idma.o
+obj-$(CONFIG_SND_SOC_EXYNOS_HDMI_AUDIO) += snd-soc-hdmi.o
# S3C24XX Machine Support
snd-soc-jive-wm8750-objs := jive_wm8750.o
diff --git a/sound/soc/samsung/hdmi.c b/sound/soc/samsung/hdmi.c
new file mode 100644
index 0000000..a600a84
--- /dev/null
+++ b/sound/soc/samsung/hdmi.c
@@ -0,0 +1,260 @@
+/*
+ * ALSA SoC Card driver for HDMI audio on Samsung Exynos processors.
+ * Copyright (C) 2013 Samsung corp.
+ * Author: Rahul Sharma <rahul.sharma@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/clk.h>
+
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "i2s.h"
+
+/* platform device pointer for eynos hdmi audio device. */
+static struct platform_device *exynos_hdmi_audio_pdev;
+
+static int set_epll_rate(unsigned long rate)
+{
+ int ret;
+ struct clk *fout_epll;
+
+ fout_epll = clk_get(NULL, "fout_epll");
+
+ if (IS_ERR(fout_epll))
+ return PTR_ERR(fout_epll);
+
+ if (rate == clk_get_rate(fout_epll))
+ goto out;
+
+ ret = clk_set_rate(fout_epll, rate);
+ if (ret < 0)
+ goto out;
+
+out:
+ clk_put(fout_epll);
+
+ return 0;
+}
+
+static int hdmi_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ int bfs, psr, rfs, ret;
+ unsigned long rclk;
+ unsigned long xtal;
+ struct clk *xtal_clk;
+
+ dev_dbg(rtd->dev, "[%d][%s]\n", __LINE__, __func__);
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_U24:
+ case SNDRV_PCM_FORMAT_S24:
+ bfs = 48;
+ break;
+ case SNDRV_PCM_FORMAT_U16_LE:
+ case SNDRV_PCM_FORMAT_S16_LE:
+ bfs = 32;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (params_rate(params)) {
+ case 16000:
+ case 22050:
+ case 24000:
+ case 32000:
+ case 44100:
+ case 48000:
+ case 88200:
+ case 96000:
+ if (bfs == 48)
+ rfs = 384;
+ else
+ rfs = 256;
+ break;
+ case 64000:
+ rfs = 384;
+ break;
+ case 8000:
+ case 11025:
+ case 12000:
+ if (bfs == 48)
+ rfs = 768;
+ else
+ rfs = 512;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ rclk = params_rate(params) * rfs;
+
+ switch (rclk) {
+ case 4096000:
+ case 5644800:
+ case 6144000:
+ case 8467200:
+ case 9216000:
+ psr = 8;
+ break;
+ case 8192000:
+ case 11289600:
+ case 12288000:
+ case 16934400:
+ case 18432000:
+ psr = 4;
+ break;
+ case 22579200:
+ case 24576000:
+ case 33868800:
+ case 36864000:
+ psr = 2;
+ break;
+ case 67737600:
+ case 73728000:
+ psr = 1;
+ break;
+ default:
+ dev_err(rtd->dev, "rclk = %lu is not yet supported!\n", rclk);
+ return -EINVAL;
+ }
+
+ ret = set_epll_rate(rclk * psr);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS);
+ if (ret < 0)
+ return ret;
+
+ xtal_clk = clk_get(NULL, "xtal"); /*xtal clk is input to codec MCLK1*/
+ if (IS_ERR(xtal_clk)) {
+ dev_err(rtd->dev, "%s: failed to get xtal clock\n", __func__);
+ return PTR_ERR(xtal_clk);
+ }
+
+ xtal = clk_get_rate(xtal_clk);
+ clk_put(xtal_clk);
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
+ 0, SND_SOC_CLOCK_OUT);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * HDMI DAI operations.
+ */
+static struct snd_soc_ops hdmi_ops = {
+ .hw_params = hdmi_hw_params,
+};
+
+static struct snd_soc_dai_link hdmi_dai[] = {
+ { /* HDMI Playback i/f */
+ .name = "HDMI Playback",
+ .stream_name = "i2s_Dai",
+ .cpu_dai_name = "samsung-i2s.0",
+ .codec_dai_name = "exynos-hdmi-audio-dai",
+ .platform_name = "samsung-i2s.0",
+ .codec_name = "exynos-hdmi-audio-codec",
+ .ops = &hdmi_ops,
+ },
+};
+
+static struct snd_soc_card hdmi = {
+ .name = "HDMI-AUDIO",
+ .owner = THIS_MODULE,
+ .dai_link = hdmi_dai,
+ .num_links = ARRAY_SIZE(hdmi_dai),
+};
+
+static int hdmi_audio_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct snd_soc_card *card = &hdmi;
+
+ card->dev = &pdev->dev;
+ dev_dbg(&pdev->dev, "[%d][%s]\n", __LINE__, __func__);
+
+ ret = snd_soc_register_card(card);
+ if (ret)
+ dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret);
+
+ return ret;
+}
+
+static int hdmi_audio_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ snd_soc_unregister_card(card);
+
+ return 0;
+}
+
+static struct platform_driver hdmi_audio_driver = {
+ .driver = {
+ .name = "exynos-hdmi-audio",
+ .owner = THIS_MODULE,
+ .pm = &snd_soc_pm_ops,
+ },
+ .probe = hdmi_audio_probe,
+ .remove = hdmi_audio_remove,
+};
+
+static int __init hdmi_audio_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&hdmi_audio_driver);
+ if (ret < 0)
+ return -EINVAL;
+
+ exynos_hdmi_audio_pdev = platform_device_register_simple
+ ("exynos-hdmi-audio", -1, NULL, 0);
+ if (IS_ERR_OR_NULL(exynos_hdmi_audio_pdev)) {
+ ret = PTR_ERR(exynos_hdmi_audio_pdev);
+ platform_driver_unregister(&hdmi_audio_driver);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void __exit hdmi_audio_exit(void)
+{
+ platform_driver_unregister(&hdmi_audio_driver);
+ platform_device_unregister(exynos_hdmi_audio_pdev);
+}
+
+module_init(hdmi_audio_init);
+module_exit(hdmi_audio_exit);
+
+MODULE_AUTHOR("Rahul Sharma <rahul.sharma@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("ALSA SoC HDMI AUDIO Card");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:hdmi-audio");
--
1.8.0
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