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path: root/drivers/media/pci/cx18/cx18-alsa.h
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Diffstat (limited to 'drivers/media/pci/cx18/cx18-alsa.h')
-rw-r--r--drivers/media/pci/cx18/cx18-alsa.h60
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/media/pci/cx18/cx18-alsa.h b/drivers/media/pci/cx18/cx18-alsa.h
new file mode 100644
index 0000000000..6d8685fe32
--- /dev/null
+++ b/drivers/media/pci/cx18/cx18-alsa.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * ALSA interface to cx18 PCM capture streams
+ *
+ * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net>
+ */
+
+struct snd_card;
+
+struct snd_cx18_card {
+ struct v4l2_device *v4l2_dev;
+ struct snd_card *sc;
+ unsigned int capture_transfer_done;
+ unsigned int hwptr_done_capture;
+ struct snd_pcm_substream *capture_pcm_substream;
+ spinlock_t slock;
+};
+
+extern int cx18_alsa_debug;
+
+/*
+ * File operations that manipulate the encoder or video or audio subdevices
+ * need to be serialized. Use the same lock we use for v4l2 file ops.
+ */
+static inline void snd_cx18_lock(struct snd_cx18_card *cxsc)
+{
+ struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
+ mutex_lock(&cx->serialize_lock);
+}
+
+static inline void snd_cx18_unlock(struct snd_cx18_card *cxsc)
+{
+ struct cx18 *cx = to_cx18(cxsc->v4l2_dev);
+ mutex_unlock(&cx->serialize_lock);
+}
+
+#define CX18_ALSA_DBGFLG_WARN (1 << 0)
+#define CX18_ALSA_DBGFLG_INFO (1 << 1)
+
+#define CX18_ALSA_DEBUG(x, type, fmt, args...) \
+ do { \
+ if ((x) & cx18_alsa_debug) \
+ printk(KERN_INFO "%s-alsa: " type ": " fmt, \
+ v4l2_dev->name , ## args); \
+ } while (0)
+
+#define CX18_ALSA_DEBUG_WARN(fmt, args...) \
+ CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
+
+#define CX18_ALSA_DEBUG_INFO(fmt, args...) \
+ CX18_ALSA_DEBUG(CX18_ALSA_DBGFLG_INFO, "info", fmt , ## args)
+
+#define CX18_ALSA_ERR(fmt, args...) \
+ printk(KERN_ERR "%s-alsa: " fmt, v4l2_dev->name , ## args)
+
+#define CX18_ALSA_WARN(fmt, args...) \
+ printk(KERN_WARNING "%s-alsa: " fmt, v4l2_dev->name , ## args)
+
+#define CX18_ALSA_INFO(fmt, args...) \
+ printk(KERN_INFO "%s-alsa: " fmt, v4l2_dev->name , ## args)