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Diffstat (limited to 'kernel/sound/hda/hdac_bus.c')
-rw-r--r--kernel/sound/hda/hdac_bus.c34
1 files changed, 32 insertions, 2 deletions
diff --git a/kernel/sound/hda/hdac_bus.c b/kernel/sound/hda/hdac_bus.c
index 8e262da74..0e81ea89a 100644
--- a/kernel/sound/hda/hdac_bus.c
+++ b/kernel/sound/hda/hdac_bus.c
@@ -11,21 +11,36 @@
static void process_unsol_events(struct work_struct *work);
+static const struct hdac_bus_ops default_ops = {
+ .command = snd_hdac_bus_send_cmd,
+ .get_response = snd_hdac_bus_get_response,
+};
+
/**
* snd_hdac_bus_init - initialize a HD-audio bas bus
* @bus: the pointer to bus object
+ * @ops: bus verb operators
+ * @io_ops: lowlevel I/O operators
*
* Returns 0 if successful, or a negative error code.
*/
int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
- const struct hdac_bus_ops *ops)
+ const struct hdac_bus_ops *ops,
+ const struct hdac_io_ops *io_ops)
{
memset(bus, 0, sizeof(*bus));
bus->dev = dev;
- bus->ops = ops;
+ if (ops)
+ bus->ops = ops;
+ else
+ bus->ops = &default_ops;
+ bus->io_ops = io_ops;
+ INIT_LIST_HEAD(&bus->stream_list);
INIT_LIST_HEAD(&bus->codec_list);
INIT_WORK(&bus->unsol_work, process_unsol_events);
+ spin_lock_init(&bus->reg_lock);
mutex_init(&bus->cmd_mutex);
+ bus->irq = -1;
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_bus_init);
@@ -36,6 +51,7 @@ EXPORT_SYMBOL_GPL(snd_hdac_bus_init);
*/
void snd_hdac_bus_exit(struct hdac_bus *bus)
{
+ WARN_ON(!list_empty(&bus->stream_list));
WARN_ON(!list_empty(&bus->codec_list));
cancel_work_sync(&bus->unsol_work);
}
@@ -156,6 +172,15 @@ static void process_unsol_events(struct work_struct *work)
}
}
+/**
+ * snd_hdac_bus_add_device - Add a codec to bus
+ * @bus: HDA core bus
+ * @codec: HDA core device to add
+ *
+ * Adds the given codec to the list in the bus. The caddr_tbl array
+ * and codec_powered bits are updated, as well.
+ * Returns zero if success, or a negative error code.
+ */
int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec)
{
if (bus->caddr_tbl[codec->addr]) {
@@ -172,6 +197,11 @@ int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec)
}
EXPORT_SYMBOL_GPL(snd_hdac_bus_add_device);
+/**
+ * snd_hdac_bus_remove_device - Remove a codec from bus
+ * @bus: HDA core bus
+ * @codec: HDA core device to remove
+ */
void snd_hdac_bus_remove_device(struct hdac_bus *bus,
struct hdac_device *codec)
{