summaryrefslogtreecommitdiffstats
path: root/sound/soc/cirrus/ep93xx-pcm.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /sound/soc/cirrus/ep93xx-pcm.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/cirrus/ep93xx-pcm.c')
-rw-r--r--sound/soc/cirrus/ep93xx-pcm.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/sound/soc/cirrus/ep93xx-pcm.c b/sound/soc/cirrus/ep93xx-pcm.c
new file mode 100644
index 0000000000..fa72acd8d3
--- /dev/null
+++ b/sound/soc/cirrus/ep93xx-pcm.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
+ *
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ * Copyright (C) 2006 Applied Data Systems
+ *
+ * Rewritten for the SoC audio subsystem (Based on PXA2xx code):
+ * Copyright (c) 2008 Ryan Mallon
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/dmaengine.h>
+
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include <linux/platform_data/dma-ep93xx.h>
+
+#include "ep93xx-pcm.h"
+
+static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER),
+ .buffer_bytes_max = 131072,
+ .period_bytes_min = 32,
+ .period_bytes_max = 32768,
+ .periods_min = 1,
+ .periods_max = 32,
+ .fifo_size = 32,
+};
+
+static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
+{
+ struct ep93xx_dma_data *data = filter_param;
+
+ if (data->direction == ep93xx_dma_chan_direction(chan)) {
+ chan->private = data;
+ return true;
+ }
+
+ return false;
+}
+
+static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
+ .pcm_hardware = &ep93xx_pcm_hardware,
+ .compat_filter_fn = ep93xx_pcm_dma_filter,
+ .prealloc_buffer_size = 131072,
+};
+
+int devm_ep93xx_pcm_platform_register(struct device *dev)
+{
+ return devm_snd_dmaengine_pcm_register(dev,
+ &ep93xx_dmaengine_pcm_config,
+ SND_DMAENGINE_PCM_FLAG_NO_DT |
+ SND_DMAENGINE_PCM_FLAG_COMPAT);
+}
+EXPORT_SYMBOL_GPL(devm_ep93xx_pcm_platform_register);
+
+MODULE_AUTHOR("Ryan Mallon");
+MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
+MODULE_LICENSE("GPL");