Functions
static int32_t	pi_udma_core_lin_alloc (pi_fc_event_handler_t handler, void *arg)
	Allocate a UDMA linear channel. More...

static void	pi_udma_core_lin_free (int32_t chan_id)
	Free a UDMA linear channel. More...

static int32_t	pi_udma_core_2d_alloc (pi_fc_event_handler_t handler, void *arg)
	Allocate a UDMA 2D channel. More...

static void	pi_udma_core_2d_free (int32_t chan_id)
	Free a UDMA 2D channel. More...

static int32_t	pi_udma_core_fifo_alloc (pi_fc_event_handler_t handler, void *arg)
	Allocate a UDMA FIFO channel. More...

static void	pi_udma_core_fifo_free (int32_t chan_id)
	Free a UDMA FIFO channel. More...

Function Documentation

static int32_t pi_udma_core_2d_alloc	(	pi_fc_event_handler_t	handler,
		void *	arg
	)

inlinestatic

Before any transfer on UDMA, a UDMA channel must be allocated. This function is used to allocate a 2D channel.

Parameters

handler Function pointer to callback.

Return values

chan_id	ID of the channel allocated if operation is successful.
-1	No available channels.

References pi_fc_event_handler_is_free(), pi_fc_event_handler_set(), UDMA_CHAN_2D_ID, and UDMA_NB_CHAN_2D.

Referenced by __pi_hyper_open(), __pi_octospi_open(), and pi_udma_datamove_open().

static void pi_udma_core_2d_free ( int32_t chan_id )

inlinestatic

When a transfer is finished on UDMA or before closing a UDMA interface, allocated channels must be freed. This function allows to free an allocated channel.

Parameters

chan_id ID of the channel to free.

References pi_fc_event_handler_clear(), UDMA_CHAN_2D_ID, and UDMA_NB_CHAN_2D.

Referenced by __pi_hyper_close(), __pi_hyper_open(), __pi_octospi_close(), __pi_octospi_open(), pi_udma_datamove_close(), and pi_udma_datamove_open().

static int32_t pi_udma_core_fifo_alloc	(	pi_fc_event_handler_t	handler,
		void *	arg
	)

inlinestatic

Before any transfer on UDMA, a UDMA channel must be allocated. This function is used to allocate a FIFO channel.

Parameters

handler Function pointer to callback.

Return values

chan_id	ID of the channel allocated if operation is successful.
-1	No available channels.

References pi_fc_event_handler_is_free(), pi_fc_event_handler_set(), UDMA_CHAN_FIFO_ID, and UDMA_NB_CHAN_FIFO.

Referenced by pi_udma_fifo_open().

static void pi_udma_core_fifo_free ( int32_t chan_id )

inlinestatic

When a transfer is finished on UDMA or before closing a UDMA interface, allocated channels must be freed. This function allows to free an allocated channel.

Parameters

chan_id ID of the channel to free.

References pi_fc_event_handler_clear(), UDMA_CHAN_FIFO_ID, and UDMA_NB_CHAN_FIFO.

Referenced by pi_udma_fifo_close().

static int32_t pi_udma_core_lin_alloc	(	pi_fc_event_handler_t	handler,
		void *	arg
	)

inlinestatic

Before any transfer on UDMA, a UDMA channel must be allocated. This function is used to allocate a linear channel.

Parameters

handler Function pointer to callback.

Return values

chan_id	ID of the channel allocated if operation is successful.
-1	No available channels.

References pi_fc_event_handler_is_free(), pi_fc_event_handler_set(), UDMA_CHAN_LIN_ID, and UDMA_NB_CHAN_LIN.

Referenced by __pi_aes_open(), __pi_cpi_open(), __pi_i2c_open(), __pi_i2c_slave_open(), __pi_i2s_slot_conf_apply(), __pi_uart_conf_set(), pi_ffc_open(), and pi_udma_datamove_open().

static void pi_udma_core_lin_free ( int32_t chan_id )

inlinestatic

When a transfer is finished on UDMA or before closing a UDMA interface, allocated channels must be freed. This function allows to free an allocated channel.

Parameters

chan_id ID of the channel to free.

References pi_fc_event_handler_clear(), UDMA_CHAN_LIN_ID, and UDMA_NB_CHAN_LIN.

Referenced by __pi_aes_close(), __pi_cpi_close(), __pi_i2c_close(), __pi_i2c_slave_close(), __pi_uart_close(), __pi_uart_conf_set(), pi_ffc_close(), pi_udma_datamove_close(), and pi_udma_datamove_open().

Functions

Function Documentation