1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 3 #include <commonlib/bsd/helpers.h> 4 #include "librem_ec.h" 5 #include "../../system76/ec/system76_ec.h" 6 7 #define CMD_PROBE 1 8 librem_ec_has_jack_detect(void)9bool librem_ec_has_jack_detect(void) 10 { 11 /* The 'flags' field in the probe command reply was added in an update. 12 Send 4 bytes of zeroes in the "request" to zero out the field if the 13 EC does not set it for its reply. */ 14 const uint8_t request_data[4] = {0}; 15 uint8_t reply_data[4] = {0}; 16 bool ec_cmd_success = system76_ec_cmd(CMD_PROBE, request_data, 17 ARRAY_SIZE(request_data), reply_data, ARRAY_SIZE(reply_data)); 18 if (!ec_cmd_success) 19 return false; 20 /* Byte 3 is flags, bit 0 is the jack detect flag */ 21 return reply_data[3] & 0x01; 22 } 23