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authorMisael Lopez Cruz <x0052729@ti.com>2010-02-22 15:09:22 -0600
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-02-23 10:41:05 +0000
commitdb72c2f89790f919d65d0adbee390958005c40fc (patch)
tree89d16b9604fe188a54f4ba07d67cf52b9428001e /sound/soc/omap/omap-mcpdm.c
parentb3b0b4580bcb771d1d53b3d5acf689cba9907392 (diff)
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ASoC: OMAP4: Add McPDM platform driver
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@ti.com> Signed-off-by: Margarita Olaya <x0080101@ti.com> Signed-off-by: Jorge Eduardo Candelaria <jorge.candelaria@ti.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/omap/omap-mcpdm.c')
-rw-r--r--sound/soc/omap/omap-mcpdm.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c
new file mode 100644
index 00000000000..25f19e4728b
--- /dev/null
+++ b/sound/soc/omap/omap-mcpdm.c
@@ -0,0 +1,251 @@
+/*
+ * omap-mcpdm.c -- OMAP ALSA SoC DAI driver using McPDM port
+ *
+ * Copyright (C) 2009 Texas Instruments
+ *
+ * Author: Misael Lopez Cruz <x0052729@ti.com>
+ * Contact: Jorge Eduardo Candelaria <x0107209@ti.com>
+ * Margarita Olaya <magi.olaya@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/control.h>
+#include <plat/dma.h>
+#include <plat/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 = MCPDM_DN_IRQ_EMPTY | MCPDM_DN_IRQ_FULL,
+ .threshold = 1,
+ .format = PDMOUTFORMAT_LJUST,
+ },
+ /* uplink */
+ {
+ .irq_mask = MCPDM_UP_IRQ_EMPTY | MCPDM_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 playback",
+ .dma_req = OMAP44XX_DMA_MCPDM_DL,
+ .data_type = OMAP_DMA_DATA_TYPE_S32,
+ .sync_mode = OMAP_DMA_SYNC_PACKET,
+ .packet_size = 16,
+ .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA,
+ },
+ {
+ .name = "Audio capture",
+ .dma_req = OMAP44XX_DMA_MCPDM_UP,
+ .data_type = OMAP_DMA_DATA_TYPE_S32,
+ .sync_mode = OMAP_DMA_SYNC_PACKET,
+ .packet_size = 16,
+ .port_addr = OMAP44XX_MCPDM_L3_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 == SNDRV_PCM_STREAM_CAPTURE)
+ /* up to 2 channels for capture */
+ return -EINVAL;
+ link_mask |= 1 << 3;
+ case 3:
+ if (stream == SNDRV_PCM_STREAM_CAPTURE)
+ /* up to 2 channels for capture */
+ 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 == SNDRV_PCM_STREAM_PLAYBACK) {
+ mcpdm_links[stream].channels = link_mask << 3;
+ err = omap_mcpdm_playback_open(&mcpdm_links[stream]);
+ } else {
+ mcpdm_links[stream].channels = link_mask << 0;
+ err = omap_mcpdm_capture_open(&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 stream = substream->stream;
+ int err;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ err = omap_mcpdm_playback_close(&mcpdm_links[stream]);
+ else
+ err = omap_mcpdm_capture_close(&mcpdm_links[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@ti.com>");
+MODULE_DESCRIPTION("OMAP PDM SoC Interface");
+MODULE_LICENSE("GPL");