ASoC: OMAP4 - HDMI DAI driver
Add HDMI audio support for the OMAP4.
Signed-off-by: Liam Girdwood <lrg@ti.com>
diff --git a/sound/soc/omap/omap-hdmi.c b/sound/soc/omap/omap-hdmi.c
new file mode 100644
index 0000000..c2d593f
--- /dev/null
+++ b/sound/soc/omap/omap-hdmi.c
@@ -0,0 +1,315 @@
+/*
+ * omap-hdmi.c -- OMAP ALSA SoC DAI driver for HDMI audio
+ *
+ * Copyright (C) 2009 Texas Instruments
+ *
+ * Contact: Jorge Candelaria <x0107209@ti.com>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include <plat/dma.h>
+#include "omap-pcm.h"
+#include "omap-hdmi.h"
+
+#define CONFIG_HDMI_NO_IP_MODULE
+#define OMAP_HDMI_RATES (SNDRV_PCM_RATE_32000 | \
+ SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
+
+/* Support for 16 and 24 bits */
+#define OMAP_HDMI_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S24_LE)
+
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+#include <plat/hdmi_lib.h>
+
+struct omap_hdmi_data {
+ struct hdmi_notifier notifier;
+};
+
+struct omap_hdmi_data hdmi_data;
+#else
+struct hdmi_ip_driver hdmi_audio_core;
+#endif
+
+static struct omap_pcm_dma_data omap_hdmi_dai_dma_params = {
+ .name = "HDMI playback",
+ .dma_req = OMAP44XX_DMA_DSS_HDMI_REQ,
+ .port_addr = HDMI_WP + HDMI_WP_AUDIO_DATA,
+ .sync_mode = OMAP_DMA_SYNC_PACKET,
+};
+
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+static void hdmi_hpd_notifier(int state, void *data)
+{
+ struct snd_pcm_substream *substream = data;
+
+ if (!state && substream)
+ snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
+}
+#endif
+
+static int omap_hdmi_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ int err = 0;
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+ struct hdmi_notifier *notifier = &hdmi_data.notifier;
+
+ notifier->hpd_notifier = hdmi_hpd_notifier;
+ notifier->private_data = substream;
+ hdmi_add_notifier(notifier);
+
+ err = hdmi_w1_wrapper_enable(HDMI_WP);
+#else
+ if (hdmi_audio_core.module_loaded)
+ err = hdmi_audio_core.wrapper_enable(HDMI_WP);
+ else
+ printk(KERN_WARNING "Warning: hdmi_core.ko is not enabled");
+#endif
+ return err;
+}
+
+static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+ struct hdmi_notifier *notifier = &hdmi_data.notifier;
+
+ hdmi_w1_wrapper_disable(HDMI_WP);
+
+ hdmi_remove_notifier(notifier);
+ notifier->private_data = NULL;
+#else
+ if (hdmi_audio_core.module_loaded)
+ hdmi_audio_core.wrapper_disable(HDMI_WP);
+ else
+ printk(KERN_WARNING "Warning: hdmi_core.ko is not enabled");
+#endif
+ return;
+}
+
+static int omap_hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ int err = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+ err = hdmi_w1_start_audio_transfer(HDMI_WP);
+#else
+ if (hdmi_audio_core.module_loaded)
+ err = hdmi_audio_core.start_audio(HDMI_WP);
+ else
+ printk(KERN_WARNING "Warning: hdmi_core.ko is "
+ "not enabled");
+#endif
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+ err = hdmi_w1_stop_audio_transfer(HDMI_WP);
+#else
+ if (hdmi_audio_core.module_loaded)
+ err = hdmi_audio_core.stop_audio(HDMI_WP);
+ else
+ printk(KERN_WARNING "Warning: hdmi_core.ko is "
+ "not enabled");
+#endif
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ int err = 0;
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+ err = hdmi_configure_audio_sample_size(HDMI_SAMPLE_16BITS);
+#else
+ if (hdmi_audio_core.module_loaded)
+ err = hdmi_audio_core.config_sample_size(HDMI_WP,
+ HDMI_SAMPLE_16BITS);
+ else
+ printk(KERN_WARNING "Warning: hdmi_core.ko is "
+ "not enabled");
+#endif
+ omap_hdmi_dai_dma_params.data_type = OMAP_DMA_DATA_TYPE_S32;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+ err = hdmi_configure_audio_sample_size(HDMI_SAMPLE_24BITS);
+#else
+ if (hdmi_audio_core.module_loaded)
+ err = hdmi_audio_core.config_sample_size(HDMI_WP,
+ HDMI_SAMPLE_24BITS);
+ else
+ printk(KERN_WARNING "Warning: hdmi_core.ko is "
+ "not enabled");
+#endif
+ omap_hdmi_dai_dma_params.data_type = OMAP_DMA_DATA_TYPE_S32;
+ break;
+ default:
+ err = -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+#if defined(CONFIG_HDMI_NO_IP) || defined(CONFIG_HDMI_NO_IP_MODULE)
+ err = hdmi_configure_audio_channels(params_channels(params),
+ HDMI_CEA_CODE_00);
+ if (err < 0)
+ return err;
+ err = hdmi_configure_audio_sample_rate(params_rate(params));
+ if (err < 0)
+ return err;
+ err = hdmi_configure_audio();
+ if (err < 0)
+ return err;
+#else
+ err = hdmi_audio_core.config_audio_channels(HDMI_WP,
+ params_channels(params), HDMI_CEA_CODE_00);
+ if (err < 0)
+ return err;
+ err = hdmi_audio_core.config_audio_sample_rate(HDMI_WP,
+ params_rate(params));
+ if (err < 0)
+ return err;
+#endif
+
+ omap_hdmi_dai_dma_params.packet_size = 0x20;
+
+ snd_soc_dai_set_dma_data(dai, substream,
+ &omap_hdmi_dai_dma_params);
+
+ return err;
+}
+
+static struct snd_soc_dai_ops omap_hdmi_dai_ops = {
+ .startup = omap_hdmi_dai_startup,
+ .shutdown = omap_hdmi_dai_shutdown,
+ .trigger = omap_hdmi_dai_trigger,
+ .hw_params = omap_hdmi_dai_hw_params,
+};
+
+static struct snd_soc_dai_driver omap_hdmi_dai = {
+ .playback = {
+ .channels_min = 2,
+ /* currently we support only stereo HDMI */
+ .channels_max = 2,
+ .rates = OMAP_HDMI_RATES,
+ .formats = OMAP_HDMI_FORMATS,
+ },
+ .ops = &omap_hdmi_dai_ops,
+};
+
+static __devinit int omap_hdmi_probe(struct platform_device *pdev)
+{
+ return snd_soc_register_dai(&pdev->dev, &omap_hdmi_dai);
+}
+
+static int __devexit omap_hdmi_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_dai(&pdev->dev);
+ return 0;
+}
+
+static struct platform_driver hdmi_dai_driver = {
+ .driver = {
+ .name = "hdmi-dai",
+ .owner = THIS_MODULE,
+ },
+ .probe = omap_hdmi_probe,
+ .remove = __devexit_p(omap_hdmi_remove),
+};
+
+static int __init hdmi_dai_init(void)
+{
+ return platform_driver_register(&hdmi_dai_driver);
+}
+module_init(hdmi_dai_init);
+
+static void __exit hdmi_dai_exit(void)
+{
+ platform_driver_unregister(&hdmi_dai_driver);
+}
+module_exit(hdmi_dai_exit);
+
+#if !defined(CONFIG_HDMI_NO_IP) && !defined(CONFIG_HDMI_NO_IP_MODULE)
+
+/* stub */
+int audio_stub_lib_init(void)
+{
+ printk(KERN_WARNING "ERR: please install HDMI IP kernel module\n");
+ return -1;
+}
+void audio_stub_lib_exit(void)
+{
+ printk(KERN_WARNING "HDMI module does not exist!\n");
+}
+
+#define EXPORT_SYMTAB
+
+/* HDMI panel driver */
+void hdmi_audio_core_stub_init(void)
+{
+ hdmi_audio_core.stop_video = NULL;
+ hdmi_audio_core.start_video = NULL;
+ hdmi_audio_core.wrapper_enable = NULL;
+ hdmi_audio_core.wrapper_disable = NULL;
+ hdmi_audio_core.stop_audio = NULL;
+ hdmi_audio_core.start_audio = NULL;
+ hdmi_audio_core.config_video = NULL;
+ hdmi_audio_core.set_wait_pll = NULL;
+ hdmi_audio_core.set_wait_pwr = NULL;
+ hdmi_audio_core.set_wait_srst = NULL;
+ hdmi_audio_core.read_edid = NULL;
+ hdmi_audio_core.config_audio_sample_rate = NULL;
+ hdmi_audio_core.config_sample_size = NULL;
+ hdmi_audio_core.config_audio_channels = NULL;
+ hdmi_audio_core.ip_init = audio_stub_lib_init;
+ hdmi_audio_core.ip_exit = audio_stub_lib_exit;
+ hdmi_audio_core.module_loaded = 0;
+}
+
+#endif
+
+
+MODULE_AUTHOR("Jorge Candelaria <x0107209@ti.com");
+MODULE_DESCRIPTION("OMAP HDMI SoC Interface");
+MODULE_LICENSE("GPL");