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Diffstat (limited to 'include/linux/slimbus.h')
-rw-r--r--include/linux/slimbus.h60
1 files changed, 54 insertions, 6 deletions
diff --git a/include/linux/slimbus.h b/include/linux/slimbus.h
index c36cf121d2cd..12c9719b2a55 100644
--- a/include/linux/slimbus.h
+++ b/include/linux/slimbus.h
@@ -14,16 +14,16 @@ extern struct bus_type slimbus_bus;
/**
* struct slim_eaddr - Enumeration address for a SLIMbus device
- * @manf_id: Manufacturer Id for the device
- * @prod_code: Product code
- * @dev_index: Device index
* @instance: Instance value
+ * @dev_index: Device index
+ * @prod_code: Product code
+ * @manf_id: Manufacturer Id for the device
*/
struct slim_eaddr {
- u16 manf_id;
- u16 prod_code;
- u8 dev_index;
u8 instance;
+ u8 dev_index;
+ u16 prod_code;
+ u16 manf_id;
} __packed;
/**
@@ -48,6 +48,8 @@ struct slim_controller;
* @ctrl: slim controller instance.
* @laddr: 1-byte Logical address of this device.
* @is_laddr_valid: indicates if the laddr is valid or not
+ * @stream_list: List of streams on this device
+ * @stream_list_lock: lock to protect the stream list
*
* This is the client/device handle returned when a SLIMbus
* device is registered with a controller.
@@ -60,6 +62,8 @@ struct slim_device {
enum slim_device_status status;
u8 laddr;
bool is_laddr_valid;
+ struct list_head stream_list;
+ spinlock_t stream_list_lock;
};
#define to_slim_device(d) container_of(d, struct slim_device, dev)
@@ -108,6 +112,36 @@ struct slim_val_inf {
struct completion *comp;
};
+#define SLIM_DEVICE_MAX_CHANNELS 256
+/* A SLIMBus Device may have frmo 0 to 31 Ports (inclusive) */
+#define SLIM_DEVICE_MAX_PORTS 32
+
+/**
+ * struct slim_stream_config - SLIMbus stream configuration
+ * Configuring a stream is done at hw_params or prepare call
+ * from audio drivers where they have all the required information
+ * regarding rate, number of channels and so on.
+ * There is a 1:1 mapping of channel and ports.
+ *
+ * @rate: data rate
+ * @bps: bits per data sample
+ * @ch_count: number of channels
+ * @chs: pointer to list of channel numbers
+ * @port_mask: port mask of ports to use for this stream
+ * @direction: direction of the stream, SNDRV_PCM_STREAM_PLAYBACK
+ * or SNDRV_PCM_STREAM_CAPTURE.
+ */
+struct slim_stream_config {
+ unsigned int rate;
+ unsigned int bps;
+ /* MAX 256 channels */
+ unsigned int ch_count;
+ unsigned int *chs;
+ /* Max 32 ports per device */
+ unsigned long port_mask;
+ int direction;
+};
+
/*
* use a macro to avoid include chaining to get THIS_MODULE
*/
@@ -138,6 +172,8 @@ static inline void slim_set_devicedata(struct slim_device *dev, void *data)
dev_set_drvdata(&dev->dev, data);
}
+struct slim_device *of_slim_get_device(struct slim_controller *ctrl,
+ struct device_node *np);
struct slim_device *slim_get_device(struct slim_controller *ctrl,
struct slim_eaddr *e_addr);
int slim_get_logical_addr(struct slim_device *sbdev);
@@ -161,4 +197,16 @@ int slim_readb(struct slim_device *sdev, u32 addr);
int slim_writeb(struct slim_device *sdev, u32 addr, u8 value);
int slim_read(struct slim_device *sdev, u32 addr, size_t count, u8 *val);
int slim_write(struct slim_device *sdev, u32 addr, size_t count, u8 *val);
+
+/* SLIMbus Stream apis */
+struct slim_stream_runtime;
+struct slim_stream_runtime *slim_stream_allocate(struct slim_device *dev,
+ const char *sname);
+int slim_stream_prepare(struct slim_stream_runtime *stream,
+ struct slim_stream_config *c);
+int slim_stream_enable(struct slim_stream_runtime *stream);
+int slim_stream_disable(struct slim_stream_runtime *stream);
+int slim_stream_unprepare(struct slim_stream_runtime *stream);
+int slim_stream_free(struct slim_stream_runtime *stream);
+
#endif /* _LINUX_SLIMBUS_H */