hm2_tram_add_bspi_frame − add a register-write to the Hostmot2 TRAM
hm2_tram_add_bspi_frame(char *name, int chan, u32 **wbuff, u32 **rbuff)
hm2_tram_add_bspi_frame Add a regular (every thread) write event to the Hostmot2 tram for bspi instance "name". "name" is a unique string given to each bspi channel during hostmot2 setup. The names of the available channels are printed to standard output during the driver loading process and take the form: hm2_<board name>.<board index>.bspi.<index> For example hm2_5i23.0.bspi.0
This function is used to add a regular, every thread, write or write-read transaction to the Translation RAM system. A write need not have a read (use 0 for **rbuff) but it is an error to have a read without a write. Note that the TRAM list is not actioned until the hm2_allocate_bspi_tram function is called. The read and write parameters must be pointers to pointers, as TRAM re-maps the buffers into contiguous memory.
Call only from realtime init code, not from user space or realtime code.
Returns 0 on success and −1 on failure.
hm2_allocate_bspi_tram(3hm2), hm2_bspi_set_read_function(3hm2), hm2_bspi_setup_chan(3hm2), hm2_bspi_set_write_function(3hm2), hm2_bspi_write_chan(3hm2), See src/hal/drivers mesa_7i65.comp for an example usage.