options()

This function is defined in options.c. The prototype is:

unsigned options( int argc,
                  char *argv[] )

This function parses the driver's command-line arguments. For information about the arguments, see devc-ser8250 in the Utilities Reference.

Depending on the options specified, this function may call:

• ttc() with an argument of TTC_INIT_RAW to configure the terminal to RAW mode
• sys_ttyinit() to initialize the tty as appropriate for the CPU platform
• ttc() with an argument of TTC_SET_OPTION to pass standard terminal configuration options to <libio-char.a> to be executed
• create_device() to create a device
• query_default_device() to query the default devices if none is specified on the command line
• enable_device() to enable all the serial ports

The options() function returns the number of ports that are enabled.