SysTutorials Posts

struct_usb_configuration – represents one gadget configuration Synopsis struct usb_configuration { const char *label; struct usb_gadget_strings **strings; const struct usb_descriptor_header **descriptors; void (*unbind)(struct usb_configuration *); int (*setup)(struct usb_configuration *, const struct usb_ctrlrequest *); u8 bConfigurationValue; u8 iConfiguration; u8 bmAttributes; u16 MaxPower; struct usb_composite_dev *cdev; }; Members label For diagnostics, describes the configuration. strings Tables of strings,…

struct_usb_composite_driver – groups configurations into a gadget Synopsis struct usb_composite_driver { const char *name; const struct usb_device_descriptor *dev; struct usb_gadget_strings **strings; enum usb_device_speed max_speed; unsigned needs_serial : 1; int (*bind)(struct usb_composite_dev *cdev); int (*unbind)(struct usb_composite_dev *); void (*disconnect)(struct usb_composite_dev *); void (*suspend)(struct usb_composite_dev *); void (*resume)(struct usb_composite_dev *); struct usb_gadget_driver gadget_driver; }; Members name For…

struct_usb_composite_dev – represents one composite usb gadget Synopsis struct usb_composite_dev { struct usb_gadget *gadget; struct usb_request *req; struct usb_request *os_desc_req; struct usb_configuration *config; u8 qw_sign[OS_STRING_QW_SIGN_LEN]; u8 b_vendor_code; struct usb_configuration *os_desc_config; unsigned int use_os_string : 1; }; Members gadget read-only, abstracts the gadget’s usb peripheral controller req used for control responses; buffer is pre-allocated os_desc_req used…

struct_usb_class_driver – identifies a USB driver that wants to use the USB major number Synopsis struct usb_class_driver { char *name; char *(*devnode)(struct device *dev, umode_t *mode); const struct file_operations *fops; int minor_base; }; Members name the usb class device name for this driver. Will show up in sysfs. devnode Callback to provide a naming hint…

struct_urb – USB Request Block Synopsis struct urb { struct list_head urb_list; struct list_head anchor_list; struct usb_anchor *anchor; struct usb_device *dev; struct usb_host_endpoint *ep; unsigned int pipe; unsigned int stream_id; int status; unsigned int transfer_flags; void *transfer_buffer; dma_addr_t transfer_dma; struct scatterlist *sg; int num_mapped_sgs; int num_sgs; u32 transfer_buffer_length; u32 actual_length; unsigned char *setup_packet; dma_addr_t setup_dma;…

struct_sublog – subchannel logout area Synopsis struct sublog { __u32 res0 : 1; __u32 esf : 7; __u32 lpum : 8; __u32 arep : 1; __u32 fvf : 5; __u32 sacc : 2; __u32 termc : 2; __u32 devsc : 1; __u32 serr : 1; __u32 ioerr : 1; __u32 seqc : 3; }; Members…

struct_socket – general BSD socket Synopsis struct socket { socket_state state; short type; unsigned long flags; struct socket_wq __rcu *wq; struct file *file; struct sock *sk; const struct proto_ops *ops; }; Members state socket state (SS_CONNECTED, etc) type socket type (SOCK_STREAM, etc) flags socket flags (SOCK_NOSPACE, etc) wq wait queue for several uses file File…

struct_sock_common – minimal network layer representation of sockets Synopsis struct sock_common { union { unnamed_union }; }; Members {unnamed_union} anonymous Description This is the minimal network layer representation of sockets, the header for struct sock and struct inet_timewait_sock. Copyright

struct_sock – network layer representation of sockets Synopsis struct sock { struct sock_common __sk_common; #define sk_node __sk_common.skc_node #define sk_nulls_node __sk_common.skc_nulls_node #define sk_refcnt __sk_common.skc_refcnt #define sk_tx_queue_mapping __sk_common.skc_tx_queue_mapping #define sk_dontcopy_begin __sk_common.skc_dontcopy_begin #define sk_dontcopy_end __sk_common.skc_dontcopy_end #define sk_hash __sk_common.skc_hash #define sk_portpair __sk_common.skc_portpair #define sk_num __sk_common.skc_num #define sk_dport __sk_common.skc_dport #define sk_addrpair __sk_common.skc_addrpair #define sk_daddr __sk_common.skc_daddr #define sk_rcv_saddr __sk_common.skc_rcv_saddr #define sk_family…

struct_snd_soc_jack_zone – Describes voltage zones of jack detection Synopsis struct snd_soc_jack_zone { unsigned int min_mv; unsigned int max_mv; unsigned int jack_type; unsigned int debounce_time; struct list_head list; }; Members min_mv start voltage in mv max_mv end voltage in mv jack_type type of jack that is expected for this voltage debounce_time debounce_time for jack, codec driver…

struct_snd_soc_jack_pin – Describes a pin to update based on jack detection Synopsis struct snd_soc_jack_pin { struct list_head list; const char *pin; int mask; bool invert; }; Members list internal list entry pin name of the pin to update mask bits to check for in reported jack status invert if non-zero then pin is enabled when…

struct_snd_soc_jack_gpio – Describes a gpio pin for jack detection Synopsis struct snd_soc_jack_gpio { unsigned int gpio; unsigned int idx; struct device *gpiod_dev; const char *name; int report; int invert; int debounce_time; bool wake; int (*jack_status_check)(void *data); }; Members gpio legacy gpio number idx gpio descriptor index within the function of the GPIO consumer device gpiod_dev…

struct_snd_enc_vorbis – Synopsis struct snd_enc_vorbis { __s32 quality; __u32 managed; __u32 max_bit_rate; __u32 min_bit_rate; __u32 downmix; }; Members quality Sets encoding quality to n, between -1 (low) and 10 (high). In the default mode of operation, the quality level is 3. Normal quality range is 0 – 10. managed Boolean. Set bitrate management mode. This…

struct_snd_enc_real – Synopsis struct snd_enc_real { __u32 quant_bits; __u32 start_region; __u32 num_regions; }; Members quant_bits number of coupling quantization bits in the stream start_region coupling start region in the stream num_regions number of regions value Description These options were extracted from the OpenMAX IL spec Copyright

struct_snd_enc_flac – Synopsis struct snd_enc_flac { __u32 num; __u32 gain; }; Members num serial number, valid only for OGG formats needs to be set by application gain Add replay gain tags Description These options were extracted from the FLAC online documentation at http://flac.sourceforge.net/documentation_tools_flac.html To make the API simpler, it is assumed that the user will…

struct_snd_dmaengine_pcm_config – Configuration data for dmaengine based PCM Synopsis struct snd_dmaengine_pcm_config { int (*prepare_slave_config)(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config); struct dma_chan *(*compat_request_channel)(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_substream *substream); dma_filter_fn compat_filter_fn; struct device *dma_dev; const char *chan_names[SNDRV_PCM_STREAM_LAST + 1]; const struct snd_pcm_hardware *pcm_hardware; unsigned int prealloc_buffer_size; }; Members prepare_slave_config Callback used to fill in…

struct_snd_dmaengine_dai_dma_data – DAI DMA configuration data Synopsis struct snd_dmaengine_dai_dma_data { dma_addr_t addr; enum dma_slave_buswidth addr_width; u32 maxburst; unsigned int slave_id; void *filter_data; const char *chan_name; unsigned int fifo_size; unsigned int flags; }; Members addr Address of the DAI data source or destination register. addr_width Width of the DAI data source or destination register. maxburst Maximum…

struct_snd_compressed_buffer – compressed buffer Synopsis struct snd_compressed_buffer { __u32 fragment_size; __u32 fragments; }; Members fragment_size size of buffer fragment in bytes fragments number of such fragments Copyright

struct_snd_compr_tstamp – timestamp descriptor Synopsis struct snd_compr_tstamp { __u32 byte_offset; __u32 copied_total; __u32 pcm_frames; __u32 pcm_io_frames; __u32 sampling_rate; }; Members byte_offset Byte offset in ring buffer to DSP copied_total Total number of bytes copied from/to ring buffer to/by DSP pcm_frames Frames decoded or encoded by DSP. This field will evolve by large steps and should…

struct_snd_compr_stream – Synopsis struct snd_compr_stream { const char *name; struct snd_compr_ops *ops; struct snd_compr_runtime *runtime; struct snd_compr *device; struct delayed_work error_work; enum snd_compr_direction direction; bool metadata_set; bool next_track; void *private_data; }; Members name device name ops pointer to DSP callbacks runtime pointer to runtime structure device device pointer error_work delayed work used when closing the…