diff options
Diffstat (limited to 'include/linux/slimbus.h')
| -rw-r--r-- | include/linux/slimbus.h | 60 |
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 */ |