McPDM platform driver is configured to use sDMA in order to transfer
to/from memory. Support for interfacing with ABE will be added later.
McPDM dai currently supports up to 4 downlink channels and 2 uplink
channels simultaneously, as well as 88.2 and 96 KHz, and a sample
size of 32 bits.
Signed-off-by: Misael Lopez Cruz <x0052729@xxxxxx>
Signed-off-by: Margarita Olaya <x0080101@xxxxxx>
Signed-off-by: Jorge Eduardo Candelaria <x0107209@xxxxxx>
---
sound/soc/omap/Makefile | 2 +-
sound/soc/omap/omap-mcpdm.c | 248 +++++++++++++++++++++++++++++++++++++++++++
sound/soc/omap/omap-mcpdm.h | 29 +++++
3 files changed, 278 insertions(+), 1 deletions(-)
create mode 100644 sound/soc/omap/omap-mcpdm.c
create mode 100644 sound/soc/omap/omap-mcpdm.h
diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile
index bf8b388..d6382fa 100644
--- a/sound/soc/omap/Makefile
+++ b/sound/soc/omap/Makefile
@@ -1,7 +1,7 @@
# OMAP Platform Support
snd-soc-omap-objs := omap-pcm.o
snd-soc-omap-mcbsp-objs := omap-mcbsp.o
-snd-soc-omap-mcpdm-objs := mcpdm.o
+snd-soc-omap-mcpdm-objs := mcpdm.o omap-mcpdm.o
obj-$(CONFIG_SND_OMAP_SOC) += snd-soc-omap.o
obj-$(CONFIG_SND_OMAP_SOC_MCBSP) += snd-soc-omap-mcbsp.o
diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c
new file mode 100644
index 0000000..9dc0ff5
--- /dev/null
+++ b/sound/soc/omap/omap-mcpdm.c
@@ -0,0 +1,248 @@
+/*
+ * omap-mcpdm.c -- OMAP ALSA SoC DAI driver using McPDM port
+ *
+ * Copyright (C) 2009 Texas Instruments
+ *
+ * Author: Misael Lopez Cruz <x0052729@xxxxxx>
+ * Contact: Jorge Eduardo Candelaria <x0107209@xxxxxx>
+ * Margarita Olaya <magi.olaya@xxxxxx>
+ *
+ * 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 <mach/control.h>
+#include <mach/dma.h>
+#include <mach/mcbsp.h>
+#include "mcpdm.h"
+#include "omap-mcpdm.h"
+#include "omap-pcm.h"
+
+struct omap_mcpdm_data {
+ struct omap_mcpdm_link *links;
+ int active;
+};
+
+static struct omap_mcpdm_link omap_mcpdm_links[] = {
+ /* downlink */
+ {
+ .irq_mask = DN_IRQ_EMTPY | DN_IRQ_FULL,
+ .threshold = 1,
+ .format = PDMOUTFORMAT_LJUST,
+ },
+ /* uplink */
+ {
+ .irq_mask = UP_IRQ_EMPTY | UP_IRQ_FULL,
+ .threshold = 1,
+ .format = PDMOUTFORMAT_LJUST,
+ },
+};
+
+static struct omap_mcpdm_data mcpdm_data = {
+ .links = omap_mcpdm_links,
+ .active = 0,
+};
+
+/*
+ * Stream DMA parameters
+ */
+static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = {
+ {
+ .name = "Audio downlink",
+ .dma_req = OMAP44XX_DMA_MCPDM_DL,
+ .data_type = OMAP_DMA_DATA_TYPE_S32,
+ .sync_mode = OMAP_DMA_SYNC_ELEMENT,
+ .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA,
+ },
+ {
+ .name = "Audio uplink",
+ .dma_req = OMAP44XX_DMA_MCPDM_UP,
+ .data_type = OMAP_DMA_DATA_TYPE_S32,
+ .sync_mode = OMAP_DMA_SYNC_ELEMENT,
+ .port_addr = OMAP44XX_MCPDM_BASE + MCPDM_UP_DATA,
+ },
+};
+
+static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+ int err = 0;
+
+ if (!cpu_dai->active)
+ err = omap_mcpdm_request();
+
+ return err;
+}
+
+static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+
+ if (!cpu_dai->active)
+ omap_mcpdm_free();
+}
+
+static int omap_mcpdm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+ struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data;
+ int stream = substream->stream;
+ int err = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (!mcpdm_priv->active++)
+ omap_mcpdm_start(stream);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (!--mcpdm_priv->active)
+ omap_mcpdm_stop(stream);
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+ struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data;
+ struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
+ int stream = substream->stream;
+ int channels, err, link_mask = 0;
+
+ cpu_dai->dma_data = &omap_mcpdm_dai_dma_params[stream];
+
+ channels = params_channels(params);
+ switch (channels) {
+ case 4:
+ if (stream)
+ /* up to 2 channels for uplink */
+ return -EINVAL;
+ link_mask |= 1 << 3;
+ case 3:
+ if (stream)
+ /* up to 2 channels for uplink */
+ return -EINVAL;
+ link_mask |= 1 << 2;
+ case 2:
+ link_mask |= 1 << 1;
+ case 1:
+ link_mask |= 1 << 0;
+ break;
+ default:
+ /* unsupported number of channels */
+ return -EINVAL;
+ }
+
+ if (stream) {
+ mcpdm_links[stream].channels = link_mask << 0;
+ err = omap_mcpdm_set_uplink(&mcpdm_links[stream]);
+ } else {
+ mcpdm_links[stream].channels = link_mask << 3;
+ err = omap_mcpdm_set_downlink(&mcpdm_links[stream]);
+ }
+
+ return err;
+}
+
+static int omap_mcpdm_dai_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+ struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data;
+ struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
+ int err;
+
+ if (substream->stream)
+ err = omap_mcpdm_clr_uplink(&mcpdm_links[substream->stream]);
+ else
+ err = omap_mcpdm_clr_downlink(&mcpdm_links[substream->stream]);
+
+ return err;
+}
+
+static struct snd_soc_dai_ops omap_mcpdm_dai_ops = {
+ .startup = omap_mcpdm_dai_startup,
+ .shutdown = omap_mcpdm_dai_shutdown,
+ .trigger = omap_mcpdm_dai_trigger,
+ .hw_params = omap_mcpdm_dai_hw_params,
+ .hw_free = omap_mcpdm_dai_hw_free,
+};
+
+#define OMAP_MCPDM_RATES (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
+#define OMAP_MCPDM_FORMATS (SNDRV_PCM_FMTBIT_S32_LE)
+
+struct snd_soc_dai omap_mcpdm_dai = {
+ .name = "omap-mcpdm",
+ .id = -1,
+ .playback = {
+ .channels_min = 1,
+ .channels_max = 4,
+ .rates = OMAP_MCPDM_RATES,
+ .formats = OMAP_MCPDM_FORMATS,
+ },
+ .capture = {
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = OMAP_MCPDM_RATES,
+ .formats = OMAP_MCPDM_FORMATS,
+ },
+ .ops = &omap_mcpdm_dai_ops,
+ .private_data = &mcpdm_data,
+};
+EXPORT_SYMBOL_GPL(omap_mcpdm_dai);
+
+static int __init snd_omap_mcpdm_init(void)
+{
+ return snd_soc_register_dai(&omap_mcpdm_dai);
+}
+module_init(snd_omap_mcpdm_init);
+
+static void __exit snd_omap_mcpdm_exit(void)
+{
+ snd_soc_unregister_dai(&omap_mcpdm_dai);
+}
+module_exit(snd_omap_mcpdm_exit);
+
+MODULE_AUTHOR("Misael Lopez Cruz <x0052729@xxxxxx>");
+MODULE_DESCRIPTION("OMAP PDM SoC Interface");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/omap/omap-mcpdm.h b/sound/soc/omap/omap-mcpdm.h
new file mode 100644
index 0000000..73b80d5
--- /dev/null
+++ b/sound/soc/omap/omap-mcpdm.h
@@ -0,0 +1,29 @@
+/*
+ * omap-mcpdm.h
+ *
+ * Copyright (C) 2009 Texas Instruments
+ *
+ * Contact: Misael Lopez Cruz <x0052729@xxxxxx>
+ *
+ * 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
+ *
+ */
+
+#ifndef __OMAP_MCPDM_H__
+#define __OMAP_MCPDM_H__
+
+extern struct snd_soc_dai omap_mcpdm_dai;
+
+#endif /* End of __OMAP_MCPDM_H__ */
--
1.6.0.4--
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