59 static int prepare_tx(struct cros_ec_device *ec_dev,  in prepare_tx()  argument
67 	if (msg->outsize + sizeof(*request) > ec_dev->dout_size)  in prepare_tx()
70 	out = ec_dev->dout;  in prepare_tx()
92 static int prepare_tx_legacy(struct cros_ec_device *ec_dev,  in prepare_tx_legacy()  argument
102 	out = ec_dev->dout;  in prepare_tx_legacy()
114 static int cros_ec_xfer_command(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)  in cros_ec_xfer_command()  argument
119 	if (ec_dev->proto_version > 2)  in cros_ec_xfer_command()
120 		xfer_fxn = ec_dev->pkt_xfer;  in cros_ec_xfer_command()
122 		xfer_fxn = ec_dev->cmd_xfer;  in cros_ec_xfer_command()
130 		dev_err_once(ec_dev->dev, "missing EC transfer API, cannot send command\n");  in cros_ec_xfer_command()
135 	ret = (*xfer_fxn)(ec_dev, msg);  in cros_ec_xfer_command()
141 static int cros_ec_wait_until_complete(struct cros_ec_device *ec_dev, uint32_t *result)  in cros_ec_wait_until_complete()  argument
158 		ret = cros_ec_xfer_command(ec_dev, msg);  in cros_ec_wait_until_complete()
183 static int cros_ec_send_command(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)  in cros_ec_send_command()  argument
185 	int ret = cros_ec_xfer_command(ec_dev, msg);  in cros_ec_send_command()
188 		ret = cros_ec_wait_until_complete(ec_dev, &msg->result);  in cros_ec_send_command()
203 int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,  in cros_ec_prepare_tx()  argument
206 	if (ec_dev->proto_version > 2)  in cros_ec_prepare_tx()
207 		return prepare_tx(ec_dev, msg);  in cros_ec_prepare_tx()
209 	return prepare_tx_legacy(ec_dev, msg);  in cros_ec_prepare_tx()
226 int cros_ec_check_result(struct cros_ec_device *ec_dev,  in cros_ec_check_result()  argument
233 		dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",  in cros_ec_check_result()
237 		dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n",  in cros_ec_check_result()
256 static int cros_ec_get_host_event_wake_mask(struct cros_ec_device *ec_dev, uint32_t *mask)  in cros_ec_get_host_event_wake_mask()  argument
269 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_host_event_wake_mask()
292 int cros_ec_rwsig_continue(struct cros_ec_device *ec_dev)  in cros_ec_rwsig_continue()  argument
299 	ec_dev->proto_version = 3;  in cros_ec_rwsig_continue()
314 		ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_rwsig_continue()
350 static int cros_ec_get_proto_info(struct cros_ec_device *ec_dev, int devidx)  in cros_ec_get_proto_info()  argument
356 	ec_dev->proto_version = 3;  in cros_ec_get_proto_info()
358 		ec_dev->max_passthru = 0;  in cros_ec_get_proto_info()
367 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_proto_info()
370 		dev_dbg(ec_dev->dev,  in cros_ec_get_proto_info()
391 		ec_dev->max_request = info->max_request_packet_size -  in cros_ec_get_proto_info()
393 		ec_dev->max_response = info->max_response_packet_size -  in cros_ec_get_proto_info()
395 		ec_dev->proto_version = min(EC_HOST_REQUEST_VERSION,  in cros_ec_get_proto_info()
397 		ec_dev->din_size = info->max_response_packet_size + EC_MAX_RESPONSE_OVERHEAD;  in cros_ec_get_proto_info()
398 		ec_dev->dout_size = info->max_request_packet_size + EC_MAX_REQUEST_OVERHEAD;  in cros_ec_get_proto_info()
400 		dev_dbg(ec_dev->dev, "using proto v%u\n", ec_dev->proto_version);  in cros_ec_get_proto_info()
403 		ec_dev->max_passthru = info->max_request_packet_size -  in cros_ec_get_proto_info()
406 		dev_dbg(ec_dev->dev, "found PD chip\n");  in cros_ec_get_proto_info()
409 		dev_dbg(ec_dev->dev, "unknown passthru index: %d\n", devidx);  in cros_ec_get_proto_info()
419 static int cros_ec_get_proto_info_legacy(struct cros_ec_device *ec_dev)  in cros_ec_get_proto_info_legacy()  argument
426 	ec_dev->proto_version = 2;  in cros_ec_get_proto_info_legacy()
439 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_proto_info_legacy()
441 		dev_dbg(ec_dev->dev, "EC failed to respond to v2 hello: %d\n", ret);  in cros_ec_get_proto_info_legacy()
448 		dev_err(ec_dev->dev, "EC responded to v2 hello with error: %d\n", msg->result);  in cros_ec_get_proto_info_legacy()
459 		dev_err(ec_dev->dev,  in cros_ec_get_proto_info_legacy()
466 	ec_dev->max_request = EC_PROTO2_MAX_PARAM_SIZE;  in cros_ec_get_proto_info_legacy()
467 	ec_dev->max_response = EC_PROTO2_MAX_PARAM_SIZE;  in cros_ec_get_proto_info_legacy()
468 	ec_dev->max_passthru = 0;  in cros_ec_get_proto_info_legacy()
469 	ec_dev->pkt_xfer = NULL;  in cros_ec_get_proto_info_legacy()
470 	ec_dev->din_size = EC_PROTO2_MSG_BYTES;  in cros_ec_get_proto_info_legacy()
471 	ec_dev->dout_size = EC_PROTO2_MSG_BYTES;  in cros_ec_get_proto_info_legacy()
473 	dev_dbg(ec_dev->dev, "falling back to proto v2\n");  in cros_ec_get_proto_info_legacy()
495 static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev, u16 cmd, u32 *mask)  in cros_ec_get_host_command_version_mask()  argument
515 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_host_command_version_mask()
545 int cros_ec_query_all(struct cros_ec_device *ec_dev)  in cros_ec_query_all()  argument
547 	struct device *dev = ec_dev->dev;  in cros_ec_query_all()
552 	if (!cros_ec_get_proto_info(ec_dev, CROS_EC_DEV_EC_INDEX)) {  in cros_ec_query_all()
554 		cros_ec_get_proto_info(ec_dev, CROS_EC_DEV_PD_INDEX);  in cros_ec_query_all()
557 		ret = cros_ec_get_proto_info_legacy(ec_dev);  in cros_ec_query_all()
564 			ec_dev->proto_version = EC_PROTO_VERSION_UNKNOWN;  in cros_ec_query_all()
565 			dev_dbg(ec_dev->dev, "EC query failed: %d\n", ret);  in cros_ec_query_all()
570 	devm_kfree(dev, ec_dev->din);  in cros_ec_query_all()
571 	devm_kfree(dev, ec_dev->dout);  in cros_ec_query_all()
573 	ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);  in cros_ec_query_all()
574 	if (!ec_dev->din) {  in cros_ec_query_all()
579 	ec_dev->dout = devm_kzalloc(dev, ec_dev->dout_size, GFP_KERNEL);  in cros_ec_query_all()
580 	if (!ec_dev->dout) {  in cros_ec_query_all()
581 		devm_kfree(dev, ec_dev->din);  in cros_ec_query_all()
587 	ret = cros_ec_get_host_command_version_mask(ec_dev, EC_CMD_GET_NEXT_EVENT, &ver_mask);  in cros_ec_query_all()
589 		ec_dev->mkbp_event_supported = 0;  in cros_ec_query_all()
591 		ec_dev->mkbp_event_supported = fls(ver_mask);  in cros_ec_query_all()
593 		dev_dbg(ec_dev->dev, "MKBP support version %u\n", ec_dev->mkbp_event_supported - 1);  in cros_ec_query_all()
597 	ret = cros_ec_get_host_command_version_mask(ec_dev, EC_CMD_HOST_SLEEP_EVENT, &ver_mask);  in cros_ec_query_all()
598 	ec_dev->host_sleep_v1 = (ret == 0 && (ver_mask & EC_VER_MASK(1)));  in cros_ec_query_all()
601 	ret = cros_ec_get_host_event_wake_mask(ec_dev, &ec_dev->host_event_wake_mask);  in cros_ec_query_all()
612 		ec_dev->host_event_wake_mask = U32_MAX &  in cros_ec_query_all()
625 			dev_err(ec_dev->dev,  in cros_ec_query_all()
656 int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)  in cros_ec_cmd_xfer()  argument
660 	mutex_lock(&ec_dev->lock);  in cros_ec_cmd_xfer()
661 	if (ec_dev->proto_version == EC_PROTO_VERSION_UNKNOWN) {  in cros_ec_cmd_xfer()
662 		ret = cros_ec_query_all(ec_dev);  in cros_ec_cmd_xfer()
664 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
666 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
671 	if (msg->insize > ec_dev->max_response) {  in cros_ec_cmd_xfer()
672 		dev_dbg(ec_dev->dev, "clamping message receive buffer\n");  in cros_ec_cmd_xfer()
673 		msg->insize = ec_dev->max_response;  in cros_ec_cmd_xfer()
677 		if (msg->outsize > ec_dev->max_request) {  in cros_ec_cmd_xfer()
678 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
681 				ec_dev->max_request);  in cros_ec_cmd_xfer()
682 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
686 		if (msg->outsize > ec_dev->max_passthru) {  in cros_ec_cmd_xfer()
687 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
690 				ec_dev->max_passthru);  in cros_ec_cmd_xfer()
691 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
696 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_cmd_xfer()
697 	mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
716 int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer_status()  argument
721 	ret = cros_ec_cmd_xfer(ec_dev, msg);  in cros_ec_cmd_xfer_status()
727 		dev_dbg(ec_dev->dev, "Command result (err: %d [%d])\n",  in cros_ec_cmd_xfer_status()
736 static int get_next_event_xfer(struct cros_ec_device *ec_dev,  in get_next_event_xfer()  argument
748 	ret = cros_ec_cmd_xfer_status(ec_dev, msg);  in get_next_event_xfer()
750 		ec_dev->event_size = ret - 1;  in get_next_event_xfer()
751 		ec_dev->event_data = *event;  in get_next_event_xfer()
757 static int get_next_event(struct cros_ec_device *ec_dev)  in get_next_event()  argument
763 	int cmd_version = ec_dev->mkbp_event_supported - 1;  in get_next_event()
766 	if (ec_dev->suspended) {  in get_next_event()
767 		dev_dbg(ec_dev->dev, "Device suspended.\n");  in get_next_event()
784 	return get_next_event_xfer(ec_dev, msg, event, cmd_version, size);  in get_next_event()
787 static int get_keyboard_state_event(struct cros_ec_device *ec_dev)  in get_keyboard_state_event()  argument
790 		  sizeof(ec_dev->event_data.data)];  in get_keyboard_state_event()
795 	msg->insize = sizeof(ec_dev->event_data.data);  in get_keyboard_state_event()
798 	ec_dev->event_size = cros_ec_cmd_xfer_status(ec_dev, msg);  in get_keyboard_state_event()
799 	ec_dev->event_data.event_type = EC_MKBP_EVENT_KEY_MATRIX;  in get_keyboard_state_event()
800 	memcpy(&ec_dev->event_data.data, msg->data,  in get_keyboard_state_event()
801 	       sizeof(ec_dev->event_data.data));  in get_keyboard_state_event()
803 	return ec_dev->event_size;  in get_keyboard_state_event()
824 int cros_ec_get_next_event(struct cros_ec_device *ec_dev,  in cros_ec_get_next_event()  argument
849 	if (!ec_dev->mkbp_event_supported)  in cros_ec_get_next_event()
850 		return get_keyboard_state_event(ec_dev);  in cros_ec_get_next_event()
852 	ret = get_next_event(ec_dev);  in cros_ec_get_next_event()
861 		dev_dbg(ec_dev->dev,  in cros_ec_get_next_event()
863 		mutex_lock(&ec_dev->lock);  in cros_ec_get_next_event()
864 		ret = cros_ec_get_host_command_version_mask(ec_dev,  in cros_ec_get_next_event()
867 		mutex_unlock(&ec_dev->lock);  in cros_ec_get_next_event()
878 		ec_dev->mkbp_event_supported = fls(ver_mask);  in cros_ec_get_next_event()
879 		dev_dbg(ec_dev->dev, "MKBP support version changed to %u\n",  in cros_ec_get_next_event()
880 			ec_dev->mkbp_event_supported - 1);  in cros_ec_get_next_event()
883 		ret = get_next_event(ec_dev);  in cros_ec_get_next_event()
890 		*has_more_events = ec_dev->event_data.event_type &  in cros_ec_get_next_event()
892 	ec_dev->event_data.event_type &= EC_MKBP_EVENT_TYPE_MASK;  in cros_ec_get_next_event()
895 		event_type = ec_dev->event_data.event_type;  in cros_ec_get_next_event()
896 		host_event = cros_ec_get_host_event(ec_dev);  in cros_ec_get_next_event()
909 			if (!(host_event & ec_dev->host_event_wake_mask))  in cros_ec_get_next_event()
928 u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev)  in cros_ec_get_host_event()  argument
932 	if (!ec_dev->mkbp_event_supported)  in cros_ec_get_host_event()
935 	if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT)  in cros_ec_get_host_event()
938 	if (ec_dev->event_size != sizeof(host_event)) {  in cros_ec_get_host_event()
939 		dev_warn(ec_dev->dev, "Invalid host event size\n");  in cros_ec_get_host_event()
943 	host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);  in cros_ec_get_host_event()
958 	int ret = cros_ec_cmd(ec->ec_dev, 0, EC_CMD_GET_FEATURES + ec->cmd_offset,  in cros_ec_read_features()
1013 	struct cros_ec_device *ec_dev = ec->ec_dev;  in cros_ec_get_sensor_count()  local
1029 	ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);  in cros_ec_get_sensor_count()
1042 	if (sensor_count < 0 && ec->cmd_offset == 0 && ec_dev->cmd_readmem) {  in cros_ec_get_sensor_count()
1043 		ret = ec_dev->cmd_readmem(ec_dev, EC_MEMMAP_ACC_STATUS,  in cros_ec_get_sensor_count()
1075 int cros_ec_cmd(struct cros_ec_device *ec_dev,  in cros_ec_cmd()  argument
1098 	ret = cros_ec_cmd_xfer_status(ec_dev, msg);  in cros_ec_cmd()
1120 int cros_ec_cmd_readmem(struct cros_ec_device *ec_dev, u8 offset, u8 size, void *dest)  in cros_ec_cmd_readmem()  argument
1127 	if (ec_dev->cmd_readmem)  in cros_ec_cmd_readmem()
1128 		return ec_dev->cmd_readmem(ec_dev, offset, size, dest);  in cros_ec_cmd_readmem()
1132 	return cros_ec_cmd(ec_dev, 0, EC_CMD_READ_MEMMAP,  in cros_ec_cmd_readmem()
1145 int cros_ec_get_cmd_versions(struct cros_ec_device *ec_dev, u16 cmd)  in cros_ec_get_cmd_versions()  argument
1154 		ret = cros_ec_cmd(ec_dev, 0, EC_CMD_GET_CMD_VERSIONS,  in cros_ec_get_cmd_versions()
1158 		ret = cros_ec_cmd(ec_dev, 1, EC_CMD_GET_CMD_VERSIONS,  in cros_ec_get_cmd_versions()
1178 bool cros_ec_device_registered(struct cros_ec_device *ec_dev)  in cros_ec_device_registered()  argument
1180 	guard(mutex)(&ec_dev->lock);  in cros_ec_device_registered()
1181 	return ec_dev->registered;  in cros_ec_device_registered()