/* * Send an idle command to the chip and wait for completion. * * Command completion is polled for once per microsecond. * * The function can be called from anywhere including an interrupt handler. * But the function is not re-entrant, so it uses the splbio/splx() * functions to prevent reentrancy. * * Return Values: * ADW_TRUE - command completed successfully * ADW_FALSE - command failed * ADW_ERROR - command timed out */