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staging: octeon-usb: cvmx-usb: convert @param

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Convert "@param name" inside comments to "@name:".

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aaro Koskinen 2013-07-29 20:07:57 +03:00 • committed by Greg Kroah-Hartman
parent a6945527d3
commit 116c163f99
1 changed files with 134 additions and 134 deletions
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268
drivers/staging/octeon-usb/cvmx-usb.c
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@ -262,8 +262,8 @@ static int octeon_usb_get_clock_type(void)
* for 32bit CSRs and logs the value in a readable format if
* debugging is on.
*
* @param usb USB block this access is for
* @param address 64bit address to read
* @usb: USB block this access is for
* @address: 64bit address to read
*
* @return Result of the read
*/
@ -280,9 +280,9 @@ static inline uint32_t __cvmx_usb_read_csr32(cvmx_usb_internal_state_t *usb,
* swizzle for 32bit CSRs and logs the value in a readable format
* if debugging is on.
*
* @param usb USB block this access is for
* @param address 64bit address to write
* @param value Value to write
* @usb: USB block this access is for
* @address: 64bit address to write
* @value: Value to write
*/
static inline void __cvmx_usb_write_csr32(cvmx_usb_internal_state_t *usb,
uint64_t address, uint32_t value)
@ -296,8 +296,8 @@ static inline void __cvmx_usb_write_csr32(cvmx_usb_internal_state_t *usb,
* Read a USB 64bit CSR. It logs the value in a readable format if
* debugging is on.
*
* @param usb USB block this access is for
* @param address 64bit address to read
* @usb: USB block this access is for
* @address: 64bit address to read
*
* @return Result of the read
*/
@ -313,9 +313,9 @@ static inline uint64_t __cvmx_usb_read_csr64(cvmx_usb_internal_state_t *usb,
* Write a USB 64bit CSR. It logs the value in a readable format
* if debugging is on.
*
* @param usb USB block this access is for
* @param address 64bit address to write
* @param value Value to write
* @usb: USB block this access is for
* @address: 64bit address to write
* @value: Value to write
*/
static inline void __cvmx_usb_write_csr64(cvmx_usb_internal_state_t *usb,
uint64_t address, uint64_t value)
@ -327,8 +327,8 @@ static inline void __cvmx_usb_write_csr64(cvmx_usb_internal_state_t *usb,
* Return non zero if this pipe connects to a non HIGH speed
* device through a high speed hub.
*
* @param usb USB block this access is for
* @param pipe Pipe to check
* @usb: USB block this access is for
* @pipe: Pipe to check
*
* @return Non zero if we need to do split transactions
*/
@ -341,7 +341,7 @@ static inline int __cvmx_usb_pipe_needs_split(cvmx_usb_internal_state_t *usb, cv
/**
* Trivial utility function to return the correct PID for a pipe
*
* @param pipe pipe to check
* @pipe: pipe to check
*
* @return PID for pipe
*/
@ -388,7 +388,7 @@ int cvmx_usb_get_num_ports(void)
/**
* Allocate a usb transaction for use
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
*
* @return Transaction or NULL
@ -413,9 +413,9 @@ static inline cvmx_usb_transaction_t *__cvmx_usb_alloc_transaction(cvmx_usb_inte
/**
* Free a usb transaction
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param transaction
* @transaction:
* Transaction to free
*/
static inline void __cvmx_usb_free_transaction(cvmx_usb_internal_state_t *usb,
@ -434,8 +434,8 @@ static inline void __cvmx_usb_free_transaction(cvmx_usb_internal_state_t *usb,
/**
* Add a pipe to the tail of a list
* @param list List to add pipe to
* @param pipe Pipe to add
* @list: List to add pipe to
* @pipe: Pipe to add
*/
static inline void __cvmx_usb_append_pipe(cvmx_usb_pipe_list_t *list, cvmx_usb_pipe_t *pipe)
{
@ -451,8 +451,8 @@ static inline void __cvmx_usb_append_pipe(cvmx_usb_pipe_list_t *list, cvmx_usb_p
/**
* Remove a pipe from a list
* @param list List to remove pipe from
* @param pipe Pipe to remove
* @list: List to remove pipe from
* @pipe: Pipe to remove
*/
static inline void __cvmx_usb_remove_pipe(cvmx_usb_pipe_list_t *list, cvmx_usb_pipe_t *pipe)
{
@ -481,13 +481,13 @@ static inline void __cvmx_usb_remove_pipe(cvmx_usb_pipe_list_t *list, cvmx_usb_p
* other access to the Octeon USB port is made. The port starts
* off in the disabled state.
*
* @param state Pointer to an empty cvmx_usb_state_t structure
* @state: Pointer to an empty cvmx_usb_state_t structure
* that will be populated by the initialize call.
* This structure is then passed to all other USB
* functions.
* @param usb_port_number
* @usb_port_number:
* Which Octeon USB port to initialize.
* @param flags Flags to control hardware initialization. See
* @flags: Flags to control hardware initialization. See
* cvmx_usb_initialize_flags_t for the flag
* definitions. Some flags are mandatory.
*
@ -815,8 +815,8 @@ int cvmx_usb_initialize(cvmx_usb_state_t *state, int usb_port_number,
* The port should be disabled with all pipes closed when this
* function is called.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @state: USB device state populated by
* cvmx_usb_initialize().
*
* @return 0 or a negative error code.
*/
@ -850,8 +850,8 @@ int cvmx_usb_shutdown(cvmx_usb_state_t *state)
* Enable a USB port. After this call succeeds, the USB port is
* online and servicing requests.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @state: USB device state populated by
* cvmx_usb_initialize().
*
* @return 0 or a negative error code.
*/
@ -944,8 +944,8 @@ int cvmx_usb_enable(cvmx_usb_state_t *state)
* Transactions in process will fail and call their
* associated callbacks.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @state: USB device state populated by
* cvmx_usb_initialize().
*
* @return 0 or a negative error code.
*/
@ -968,8 +968,8 @@ int cvmx_usb_disable(cvmx_usb_state_t *state)
* on the last call to cvmx_usb_set_status(). In order to clear
* them, you must update the status through cvmx_usb_set_status().
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @state: USB device state populated by
* cvmx_usb_initialize().
*
* @return Port status information
*/
@ -1000,9 +1000,9 @@ cvmx_usb_port_status_t cvmx_usb_get_status(cvmx_usb_state_t *state)
* status passed to this function is not used. No fields can be
* changed through this call.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param port_status
* @port_status:
* Port status to set, most like returned by cvmx_usb_get_status()
*/
void cvmx_usb_set_status(cvmx_usb_state_t *state, cvmx_usb_port_status_t port_status)
@ -1016,9 +1016,9 @@ void cvmx_usb_set_status(cvmx_usb_state_t *state, cvmx_usb_port_status_t port_st
/**
* Convert a USB transaction into a handle
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param transaction
* @transaction:
* Transaction to get handle for
*
* @return Handle
@ -1034,9 +1034,9 @@ static inline int __cvmx_usb_get_submit_handle(cvmx_usb_internal_state_t *usb,
/**
* Convert a USB pipe into a handle
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param pipe Pipe to get handle for
* @pipe: Pipe to get handle for
*
* @return Handle
*/
@ -1052,49 +1052,49 @@ static inline int __cvmx_usb_get_pipe_handle(cvmx_usb_internal_state_t *usb,
* must be opened before data can be transferred between a device
* and Octeon.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param flags Optional pipe flags defined in
* @flags: Optional pipe flags defined in
* cvmx_usb_pipe_flags_t.
* @param device_addr
* @device_addr:
* USB device address to open the pipe to
* (0-127).
* @param endpoint_num
* @endpoint_num:
* USB endpoint number to open the pipe to
* (0-15).
* @param device_speed
* @device_speed:
* The speed of the device the pipe is going
* to. This must match the device's speed,
* which may be different than the port speed.
* @param max_packet The maximum packet length the device can
* @max_packet: The maximum packet length the device can
* transmit/receive (low speed=0-8, full
* speed=0-1023, high speed=0-1024). This value
* comes from the standard endpoint descriptor
* field wMaxPacketSize bits <10:0>.
* @param transfer_type
* @transfer_type:
* The type of transfer this pipe is for.
* @param transfer_dir
* @transfer_dir:
* The direction the pipe is in. This is not
* used for control pipes.
* @param interval For ISOCHRONOUS and INTERRUPT transfers,
* @interval: For ISOCHRONOUS and INTERRUPT transfers,
* this is how often the transfer is scheduled
* for. All other transfers should specify
* zero. The units are in frames (8000/sec at
* high speed, 1000/sec for full speed).
* @param multi_count
* @multi_count:
* For high speed devices, this is the maximum
* allowed number of packet per microframe.
* Specify zero for non high speed devices. This
* value comes from the standard endpoint descriptor
* field wMaxPacketSize bits <12:11>.
* @param hub_device_addr
* @hub_device_addr:
* Hub device address this device is connected
* to. Devices connected directly to Octeon
* use zero. This is only used when the device
* is full/low speed behind a high speed hub.
* The address will be of the high speed hub,
* not and full speed hubs after it.
* @param hub_port Which port on the hub the device is
* @hub_port: Which port on the hub the device is
* connected. Use zero for devices connected
* directly to Octeon. Like hub_device_addr,
* this is only used for full/low speed
@ -1191,7 +1191,7 @@ int cvmx_usb_open_pipe(cvmx_usb_state_t *state, cvmx_usb_pipe_flags_t flags,
* in non DMA mode. It is very important that this function be called quickly
* enough to prevent FIFO overflow.
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
*/
static void __cvmx_usb_poll_rx_fifo(cvmx_usb_internal_state_t *usb)
@ -1235,10 +1235,10 @@ static void __cvmx_usb_poll_rx_fifo(cvmx_usb_internal_state_t *usb)
* Fill the TX hardware fifo with data out of the software
* fifos
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param fifo Software fifo to use
* @param available Amount of space in the hardware fifo
* @fifo: Software fifo to use
* @available: Amount of space in the hardware fifo
*
* @return Non zero if the hardware fifo was too small and needs
* to be serviced again.
@ -1294,7 +1294,7 @@ static int __cvmx_usb_fill_tx_hw(cvmx_usb_internal_state_t *usb, cvmx_usb_tx_fif
/**
* Check the hardware FIFOs and fill them as needed
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
*/
static void __cvmx_usb_poll_tx_fifo(cvmx_usb_internal_state_t *usb)
@ -1324,9 +1324,9 @@ static void __cvmx_usb_poll_tx_fifo(cvmx_usb_internal_state_t *usb)
/**
* Fill the TX FIFO with an outgoing packet
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param channel Channel number to get packet from
* @channel: Channel number to get packet from
*/
static void __cvmx_usb_fill_tx_fifo(cvmx_usb_internal_state_t *usb, int channel)
{
@ -1373,10 +1373,10 @@ static void __cvmx_usb_fill_tx_fifo(cvmx_usb_internal_state_t *usb, int channel)
* the generic stuff will already have been done in
* __cvmx_usb_start_channel()
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param channel Channel to setup
* @param pipe Pipe for control transaction
* @channel: Channel to setup
* @pipe: Pipe for control transaction
*/
static void __cvmx_usb_start_channel_control(cvmx_usb_internal_state_t *usb,
int channel,
@ -1502,10 +1502,10 @@ static void __cvmx_usb_start_channel_control(cvmx_usb_internal_state_t *usb,
/**
* Start a channel to perform the pipe's head transaction
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param channel Channel to setup
* @param pipe Pipe to start
* @channel: Channel to setup
* @pipe: Pipe to start
*/
static void __cvmx_usb_start_channel(cvmx_usb_internal_state_t *usb,
int channel,
@ -1788,10 +1788,10 @@ static void __cvmx_usb_start_channel(cvmx_usb_internal_state_t *usb,
/**
* Find a pipe that is ready to be scheduled to hardware.
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param list Pipe list to search
* @param current_frame
* @list: Pipe list to search
* @current_frame:
* Frame counter to use as a time reference.
*
* @return Pipe or NULL if none are ready
@ -1818,9 +1818,9 @@ static cvmx_usb_pipe_t *__cvmx_usb_find_ready_pipe(cvmx_usb_internal_state_t *us
* Called whenever a pipe might need to be scheduled to the
* hardware.
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param is_sof True if this schedule was called on a SOF interrupt.
* @is_sof: True if this schedule was called on a SOF interrupt.
*/
static void __cvmx_usb_schedule(cvmx_usb_internal_state_t *usb, int is_sof)
{
@ -1891,13 +1891,13 @@ done:
/**
* Call a user's callback for a specific reason.
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param pipe Pipe the callback is for or NULL
* @param transaction
* @pipe: Pipe the callback is for or NULL
* @transaction:
* Transaction the callback is for or NULL
* @param reason Reason this callback is being called
* @param complete_code
* @reason: Reason this callback is being called
* @complete_code:
* Completion code for the transaction, if any
*/
static void __cvmx_usb_perform_callback(cvmx_usb_internal_state_t *usb,
@ -1937,12 +1937,12 @@ static void __cvmx_usb_perform_callback(cvmx_usb_internal_state_t *usb,
* Signal the completion of a transaction and free it. The
* transaction will be removed from the pipe transaction list.
*
* @param usb USB device state populated by
* @usb: USB device state populated by
* cvmx_usb_initialize().
* @param pipe Pipe the transaction is on
* @param transaction
* @pipe: Pipe the transaction is on
* @transaction:
* Transaction that completed
* @param complete_code
* @complete_code:
* Completion code
*/
static void __cvmx_usb_perform_complete(cvmx_usb_internal_state_t *usb,
@ -2003,24 +2003,24 @@ done:
* Submit a usb transaction to a pipe. Called for all types
* of transactions.
*
* @param usb
* @param pipe_handle
* @usb:
* @pipe_handle:
* Which pipe to submit to. Will be validated in this function.
* @param type Transaction type
* @param flags Flags for the transaction
* @param buffer User buffer for the transaction
* @param buffer_length
* @type: Transaction type
* @flags: Flags for the transaction
* @buffer: User buffer for the transaction
* @buffer_length:
* User buffer's length in bytes
* @param control_header
* @control_header:
* For control transactions, the 8 byte standard header
* @param iso_start_frame
* @iso_start_frame:
* For ISO transactions, the start frame
* @param iso_number_packets
* @iso_number_packets:
* For ISO, the number of packet in the transaction.
* @param iso_packets
* @iso_packets:
* A description of each ISO packet
* @param callback User callback to call when the transaction completes
* @param user_data User's data for the callback
* @callback: User callback to call when the transaction completes
* @user_data: User's data for the callback
*
* @return Submit handle or negative on failure. Matches the result
* in the external API.
@ -2097,18 +2097,18 @@ static int __cvmx_usb_submit_transaction(cvmx_usb_internal_state_t *usb,
/**
* Call to submit a USB Bulk transfer to a pipe.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* @pipe_handle:
* Handle to the pipe for the transfer.
* @param buffer Physical address of the data buffer in
* @buffer: Physical address of the data buffer in
* memory. Note that this is NOT A POINTER, but
* the full 64bit physical address of the
* buffer. This may be zero if buffer_length is
* zero.
* @param buffer_length
* @buffer_length:
* Length of buffer in bytes.
* @param callback Function to call when this transaction
* @callback: Function to call when this transaction
* completes. If the return value of this
* function isn't an error, then this function
* is guaranteed to be called when the
@ -2117,7 +2117,7 @@ static int __cvmx_usb_submit_transaction(cvmx_usb_internal_state_t *usb,
* through cvmx_usb_register_callback is
* called. If both are NULL, then there is no
* way to know when a transaction completes.
* @param user_data User supplied data returned when the
* @user_data: User supplied data returned when the
* callback is called. This is only used if
* callback in not NULL.
*
@ -2156,18 +2156,18 @@ int cvmx_usb_submit_bulk(cvmx_usb_state_t *state, int pipe_handle,
/**
* Call to submit a USB Interrupt transfer to a pipe.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* @pipe_handle:
* Handle to the pipe for the transfer.
* @param buffer Physical address of the data buffer in
* @buffer: Physical address of the data buffer in
* memory. Note that this is NOT A POINTER, but
* the full 64bit physical address of the
* buffer. This may be zero if buffer_length is
* zero.
* @param buffer_length
* @buffer_length:
* Length of buffer in bytes.
* @param callback Function to call when this transaction
* @callback: Function to call when this transaction
* completes. If the return value of this
* function isn't an error, then this function
* is guaranteed to be called when the
@ -2176,7 +2176,7 @@ int cvmx_usb_submit_bulk(cvmx_usb_state_t *state, int pipe_handle,
* through cvmx_usb_register_callback is
* called. If both are NULL, then there is no
* way to know when a transaction completes.
* @param user_data User supplied data returned when the
* @user_data: User supplied data returned when the
* callback is called. This is only used if
* callback in not NULL.
*
@ -2215,22 +2215,22 @@ int cvmx_usb_submit_interrupt(cvmx_usb_state_t *state, int pipe_handle,
/**
* Call to submit a USB Control transfer to a pipe.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* @pipe_handle:
* Handle to the pipe for the transfer.
* @param control_header
* @control_header:
* USB 8 byte control header physical address.
* Note that this is NOT A POINTER, but the
* full 64bit physical address of the buffer.
* @param buffer Physical address of the data buffer in
* @buffer: Physical address of the data buffer in
* memory. Note that this is NOT A POINTER, but
* the full 64bit physical address of the
* buffer. This may be zero if buffer_length is
* zero.
* @param buffer_length
* @buffer_length:
* Length of buffer in bytes.
* @param callback Function to call when this transaction
* @callback: Function to call when this transaction
* completes. If the return value of this
* function isn't an error, then this function
* is guaranteed to be called when the
@ -2239,7 +2239,7 @@ int cvmx_usb_submit_interrupt(cvmx_usb_state_t *state, int pipe_handle,
* through cvmx_usb_register_callback is
* called. If both are NULL, then there is no
* way to know when a transaction completes.
* @param user_data User supplied data returned when the
* @user_data: User supplied data returned when the
* callback is called. This is only used if
* callback in not NULL.
*
@ -2285,32 +2285,32 @@ int cvmx_usb_submit_control(cvmx_usb_state_t *state, int pipe_handle,
/**
* Call to submit a USB Isochronous transfer to a pipe.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* @pipe_handle:
* Handle to the pipe for the transfer.
* @param start_frame
* @start_frame:
* Number of frames into the future to schedule
* this transaction.
* @param flags Flags to control the transfer. See
* @flags: Flags to control the transfer. See
* cvmx_usb_isochronous_flags_t for the flag
* definitions.
* @param number_packets
* @number_packets:
* Number of sequential packets to transfer.
* "packets" is a pointer to an array of this
* many packet structures.
* @param packets Description of each transfer packet as
* @packets: Description of each transfer packet as
* defined by cvmx_usb_iso_packet_t. The array
* pointed to here must stay valid until the
* complete callback is called.
* @param buffer Physical address of the data buffer in
* @buffer: Physical address of the data buffer in
* memory. Note that this is NOT A POINTER, but
* the full 64bit physical address of the
* buffer. This may be zero if buffer_length is
* zero.
* @param buffer_length
* @buffer_length:
* Length of buffer in bytes.
* @param callback Function to call when this transaction
* @callback: Function to call when this transaction
* completes. If the return value of this
* function isn't an error, then this function
* is guaranteed to be called when the
@ -2319,7 +2319,7 @@ int cvmx_usb_submit_control(cvmx_usb_state_t *state, int pipe_handle,
* through cvmx_usb_register_callback is
* called. If both are NULL, then there is no
* way to know when a transaction completes.
* @param user_data User supplied data returned when the
* @user_data: User supplied data returned when the
* callback is called. This is only used if
* callback in not NULL.
*
@ -2373,11 +2373,11 @@ int cvmx_usb_submit_isochronous(cvmx_usb_state_t *state, int pipe_handle,
* a frame or two for the cvmx_usb_poll() function to call the
* associated callback.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* @pipe_handle:
* Pipe handle to cancel requests in.
* @param submit_handle
* @submit_handle:
* Handle to transaction to cancel, returned by the submit function.
*
* @return 0 or a negative error code.
@ -2432,9 +2432,9 @@ int cvmx_usb_cancel(cvmx_usb_state_t *state, int pipe_handle, int submit_handle)
* Cancel all outstanding requests in a pipe. Logically all this
* does is call cvmx_usb_cancel() in a loop.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* @pipe_handle:
* Pipe handle to cancel requests in.
*
* @return 0 or a negative error code.
@ -2465,9 +2465,9 @@ int cvmx_usb_cancel_all(cvmx_usb_state_t *state, int pipe_handle)
/**
* Close a pipe created with cvmx_usb_open_pipe().
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* @pipe_handle:
* Pipe handle to close.
*
* @return 0 or a negative error code. EBUSY is returned if the pipe has
@ -2500,11 +2500,11 @@ int cvmx_usb_close_pipe(cvmx_usb_state_t *state, int pipe_handle)
/**
* Register a function to be called when various USB events occur.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param reason Which event to register for.
* @param callback Function to call when the event occurs.
* @param user_data User data parameter to the function.
* @state: USB device state populated by
* cvmx_usb_initialize().
* @reason: Which event to register for.
* @callback: Function to call when the event occurs.
* @user_data: User data parameter to the function.
*
* @return 0 or a negative error code.
*/
@ -2531,8 +2531,8 @@ int cvmx_usb_register_callback(cvmx_usb_state_t *state,
* Get the current USB protocol level frame number. The frame
* number is always in the range of 0-0x7ff.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @state: USB device state populated by
* cvmx_usb_initialize().
*
* @return USB frame number
*/
@ -2552,8 +2552,8 @@ int cvmx_usb_get_frame_number(cvmx_usb_state_t *state)
/**
* Poll a channel for status
*
* @param usb USB device
* @param channel Channel to poll
* @usb: USB device
* @channel: Channel to poll
*
* @return Zero on success
*/
@ -2989,7 +2989,7 @@ static int __cvmx_usb_poll_channel(cvmx_usb_internal_state_t *usb, int channel)
* handler for the USB controller. It can also be called
* periodically in a loop for non-interrupt based operation.
*
* @param state USB device state populated by
* @state: USB device state populated by
* cvmx_usb_initialize().
*
* @return 0 or a negative error code.