sdio_slave_ll_send_start() function

Address of the SLC registers

Descriptor to send

Stop the sending DMA.

Increase the receiving buffer counter by 1.

Enable the receiving interrupt.

Reset the sending DMA.

Write the PKT_LEN register to be written by the host to a certain value.

Enable the rx_done interrupt. (sending)

Enable the sending interrupt (rx_eof).

Clear the sending interrupt (rx_eof).

Start receiving DMA with the given descriptor.

Initialize the hardware.

Clear the rx_done interrupt. (sending)

Reset the receiving buffer.

Check whether there is a receiving finished event.

Clear the receiving finished interrupt.

Restart the DMA. Call after you modified the next pointer of the tail descriptor to the appended descriptor.

Reset the receiving DMA.

Stop the receiving DMA.

Check whether the hardware is ready for the SW to use rx_done to invoke the ISR.

Check whether the sending is done.

Send general purpose interrupts to the host.

Enable some of the slave interrupts (send from host)

Fetch the slave interrupts (send from host) and clear them.