55 static int prepare_tx(struct cros_ec_device *ec_dev,  in prepare_tx()  argument
63 	if (msg->outsize + sizeof(*request) > ec_dev->dout_size)  in prepare_tx()
66 	out = ec_dev->dout;  in prepare_tx()
88 static int prepare_tx_legacy(struct cros_ec_device *ec_dev,  in prepare_tx_legacy()  argument
98 	out = ec_dev->dout;  in prepare_tx_legacy()
110 static int cros_ec_xfer_command(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)  in cros_ec_xfer_command()  argument
115 	if (ec_dev->proto_version > 2)  in cros_ec_xfer_command()
116 		xfer_fxn = ec_dev->pkt_xfer;  in cros_ec_xfer_command()
118 		xfer_fxn = ec_dev->cmd_xfer;  in cros_ec_xfer_command()
126 		dev_err_once(ec_dev->dev, "missing EC transfer API, cannot send command\n");  in cros_ec_xfer_command()
131 	ret = (*xfer_fxn)(ec_dev, msg);  in cros_ec_xfer_command()
137 static int cros_ec_wait_until_complete(struct cros_ec_device *ec_dev, uint32_t *result)  in cros_ec_wait_until_complete()  argument
156 		ret = cros_ec_xfer_command(ec_dev, msg);  in cros_ec_wait_until_complete()
181 static int cros_ec_send_command(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)  in cros_ec_send_command()  argument
183 	int ret = cros_ec_xfer_command(ec_dev, msg);  in cros_ec_send_command()
186 		ret = cros_ec_wait_until_complete(ec_dev, &msg->result);  in cros_ec_send_command()
201 int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,  in cros_ec_prepare_tx()  argument
204 	if (ec_dev->proto_version > 2)  in cros_ec_prepare_tx()
205 		return prepare_tx(ec_dev, msg);  in cros_ec_prepare_tx()
207 	return prepare_tx_legacy(ec_dev, msg);  in cros_ec_prepare_tx()
224 int cros_ec_check_result(struct cros_ec_device *ec_dev,  in cros_ec_check_result()  argument
231 		dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",  in cros_ec_check_result()
235 		dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n",  in cros_ec_check_result()
255 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
268 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_host_event_wake_mask()
291 static int cros_ec_get_proto_info(struct cros_ec_device *ec_dev, int devidx)  in cros_ec_get_proto_info()  argument
297 	ec_dev->proto_version = 3;  in cros_ec_get_proto_info()
299 		ec_dev->max_passthru = 0;  in cros_ec_get_proto_info()
308 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_proto_info()
317 		ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_proto_info()
320 		dev_dbg(ec_dev->dev,  in cros_ec_get_proto_info()
341 		ec_dev->max_request = info->max_request_packet_size -  in cros_ec_get_proto_info()
343 		ec_dev->max_response = info->max_response_packet_size -  in cros_ec_get_proto_info()
345 		ec_dev->proto_version = min(EC_HOST_REQUEST_VERSION,  in cros_ec_get_proto_info()
347 		ec_dev->din_size = info->max_response_packet_size + EC_MAX_RESPONSE_OVERHEAD;  in cros_ec_get_proto_info()
348 		ec_dev->dout_size = info->max_request_packet_size + EC_MAX_REQUEST_OVERHEAD;  in cros_ec_get_proto_info()
350 		dev_dbg(ec_dev->dev, "using proto v%u\n", ec_dev->proto_version);  in cros_ec_get_proto_info()
353 		ec_dev->max_passthru = info->max_request_packet_size -  in cros_ec_get_proto_info()
356 		dev_dbg(ec_dev->dev, "found PD chip\n");  in cros_ec_get_proto_info()
359 		dev_dbg(ec_dev->dev, "unknown passthru index: %d\n", devidx);  in cros_ec_get_proto_info()
369 static int cros_ec_get_proto_info_legacy(struct cros_ec_device *ec_dev)  in cros_ec_get_proto_info_legacy()  argument
376 	ec_dev->proto_version = 2;  in cros_ec_get_proto_info_legacy()
389 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_proto_info_legacy()
391 		dev_dbg(ec_dev->dev, "EC failed to respond to v2 hello: %d\n", ret);  in cros_ec_get_proto_info_legacy()
398 		dev_err(ec_dev->dev, "EC responded to v2 hello with error: %d\n", msg->result);  in cros_ec_get_proto_info_legacy()
409 		dev_err(ec_dev->dev,  in cros_ec_get_proto_info_legacy()
416 	ec_dev->max_request = EC_PROTO2_MAX_PARAM_SIZE;  in cros_ec_get_proto_info_legacy()
417 	ec_dev->max_response = EC_PROTO2_MAX_PARAM_SIZE;  in cros_ec_get_proto_info_legacy()
418 	ec_dev->max_passthru = 0;  in cros_ec_get_proto_info_legacy()
419 	ec_dev->pkt_xfer = NULL;  in cros_ec_get_proto_info_legacy()
420 	ec_dev->din_size = EC_PROTO2_MSG_BYTES;  in cros_ec_get_proto_info_legacy()
421 	ec_dev->dout_size = EC_PROTO2_MSG_BYTES;  in cros_ec_get_proto_info_legacy()
423 	dev_dbg(ec_dev->dev, "falling back to proto v2\n");  in cros_ec_get_proto_info_legacy()
446 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
466 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_get_host_command_version_mask()
496 int cros_ec_query_all(struct cros_ec_device *ec_dev)  in cros_ec_query_all()  argument
498 	struct device *dev = ec_dev->dev;  in cros_ec_query_all()
503 	if (!cros_ec_get_proto_info(ec_dev, CROS_EC_DEV_EC_INDEX)) {  in cros_ec_query_all()
505 		cros_ec_get_proto_info(ec_dev, CROS_EC_DEV_PD_INDEX);  in cros_ec_query_all()
508 		ret = cros_ec_get_proto_info_legacy(ec_dev);  in cros_ec_query_all()
515 			ec_dev->proto_version = EC_PROTO_VERSION_UNKNOWN;  in cros_ec_query_all()
516 			dev_dbg(ec_dev->dev, "EC query failed: %d\n", ret);  in cros_ec_query_all()
521 	devm_kfree(dev, ec_dev->din);  in cros_ec_query_all()
522 	devm_kfree(dev, ec_dev->dout);  in cros_ec_query_all()
524 	ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);  in cros_ec_query_all()
525 	if (!ec_dev->din) {  in cros_ec_query_all()
530 	ec_dev->dout = devm_kzalloc(dev, ec_dev->dout_size, GFP_KERNEL);  in cros_ec_query_all()
531 	if (!ec_dev->dout) {  in cros_ec_query_all()
532 		devm_kfree(dev, ec_dev->din);  in cros_ec_query_all()
538 	ret = cros_ec_get_host_command_version_mask(ec_dev, EC_CMD_GET_NEXT_EVENT, &ver_mask);  in cros_ec_query_all()
540 		ec_dev->mkbp_event_supported = 0;  in cros_ec_query_all()
542 		ec_dev->mkbp_event_supported = fls(ver_mask);  in cros_ec_query_all()
544 		dev_dbg(ec_dev->dev, "MKBP support version %u\n", ec_dev->mkbp_event_supported - 1);  in cros_ec_query_all()
548 	ret = cros_ec_get_host_command_version_mask(ec_dev, EC_CMD_HOST_SLEEP_EVENT, &ver_mask);  in cros_ec_query_all()
549 	ec_dev->host_sleep_v1 = (ret == 0 && (ver_mask & EC_VER_MASK(1)));  in cros_ec_query_all()
552 	ret = cros_ec_get_host_event_wake_mask(ec_dev, &ec_dev->host_event_wake_mask);  in cros_ec_query_all()
563 		ec_dev->host_event_wake_mask = U32_MAX &  in cros_ec_query_all()
576 			dev_err(ec_dev->dev,  in cros_ec_query_all()
607 int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)  in cros_ec_cmd_xfer()  argument
611 	mutex_lock(&ec_dev->lock);  in cros_ec_cmd_xfer()
612 	if (ec_dev->proto_version == EC_PROTO_VERSION_UNKNOWN) {  in cros_ec_cmd_xfer()
613 		ret = cros_ec_query_all(ec_dev);  in cros_ec_cmd_xfer()
615 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
617 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
622 	if (msg->insize > ec_dev->max_response) {  in cros_ec_cmd_xfer()
623 		dev_dbg(ec_dev->dev, "clamping message receive buffer\n");  in cros_ec_cmd_xfer()
624 		msg->insize = ec_dev->max_response;  in cros_ec_cmd_xfer()
628 		if (msg->outsize > ec_dev->max_request) {  in cros_ec_cmd_xfer()
629 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
632 				ec_dev->max_request);  in cros_ec_cmd_xfer()
633 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
637 		if (msg->outsize > ec_dev->max_passthru) {  in cros_ec_cmd_xfer()
638 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
641 				ec_dev->max_passthru);  in cros_ec_cmd_xfer()
642 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
647 	ret = cros_ec_send_command(ec_dev, msg);  in cros_ec_cmd_xfer()
648 	mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
667 int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer_status()  argument
672 	ret = cros_ec_cmd_xfer(ec_dev, msg);  in cros_ec_cmd_xfer_status()
678 		dev_dbg(ec_dev->dev, "Command result (err: %d [%d])\n",  in cros_ec_cmd_xfer_status()
687 static int get_next_event_xfer(struct cros_ec_device *ec_dev,  in get_next_event_xfer()  argument
699 	ret = cros_ec_cmd_xfer_status(ec_dev, msg);  in get_next_event_xfer()
701 		ec_dev->event_size = ret - 1;  in get_next_event_xfer()
702 		ec_dev->event_data = *event;  in get_next_event_xfer()
708 static int get_next_event(struct cros_ec_device *ec_dev)  in get_next_event()  argument
716 	const int cmd_version = ec_dev->mkbp_event_supported - 1;  in get_next_event()
719 	if (ec_dev->suspended) {  in get_next_event()
720 		dev_dbg(ec_dev->dev, "Device suspended.\n");  in get_next_event()
725 		return get_next_event_xfer(ec_dev, msg, event, 0,  in get_next_event()
728 	return get_next_event_xfer(ec_dev, msg, event, cmd_version,  in get_next_event()
732 static int get_keyboard_state_event(struct cros_ec_device *ec_dev)  in get_keyboard_state_event()  argument
735 		  sizeof(ec_dev->event_data.data)];  in get_keyboard_state_event()
740 	msg->insize = sizeof(ec_dev->event_data.data);  in get_keyboard_state_event()
743 	ec_dev->event_size = cros_ec_cmd_xfer_status(ec_dev, msg);  in get_keyboard_state_event()
744 	ec_dev->event_data.event_type = EC_MKBP_EVENT_KEY_MATRIX;  in get_keyboard_state_event()
745 	memcpy(&ec_dev->event_data.data, msg->data,  in get_keyboard_state_event()
746 	       sizeof(ec_dev->event_data.data));  in get_keyboard_state_event()
748 	return ec_dev->event_size;  in get_keyboard_state_event()
769 int cros_ec_get_next_event(struct cros_ec_device *ec_dev,  in cros_ec_get_next_event()  argument
794 	if (!ec_dev->mkbp_event_supported)  in cros_ec_get_next_event()
795 		return get_keyboard_state_event(ec_dev);  in cros_ec_get_next_event()
797 	ret = get_next_event(ec_dev);  in cros_ec_get_next_event()
806 		dev_dbg(ec_dev->dev,  in cros_ec_get_next_event()
808 		ret = cros_ec_get_host_command_version_mask(ec_dev,  in cros_ec_get_next_event()
821 		ec_dev->mkbp_event_supported = fls(ver_mask);  in cros_ec_get_next_event()
822 		dev_dbg(ec_dev->dev, "MKBP support version changed to %u\n",  in cros_ec_get_next_event()
823 			ec_dev->mkbp_event_supported - 1);  in cros_ec_get_next_event()
826 		ret = get_next_event(ec_dev);  in cros_ec_get_next_event()
833 		*has_more_events = ec_dev->event_data.event_type &  in cros_ec_get_next_event()
835 	ec_dev->event_data.event_type &= EC_MKBP_EVENT_TYPE_MASK;  in cros_ec_get_next_event()
838 		event_type = ec_dev->event_data.event_type;  in cros_ec_get_next_event()
839 		host_event = cros_ec_get_host_event(ec_dev);  in cros_ec_get_next_event()
852 			if (!(host_event & ec_dev->host_event_wake_mask))  in cros_ec_get_next_event()
871 u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev)  in cros_ec_get_host_event()  argument
875 	if (!ec_dev->mkbp_event_supported)  in cros_ec_get_host_event()
878 	if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT)  in cros_ec_get_host_event()
881 	if (ec_dev->event_size != sizeof(host_event)) {  in cros_ec_get_host_event()
882 		dev_warn(ec_dev->dev, "Invalid host event size\n");  in cros_ec_get_host_event()
886 	host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);  in cros_ec_get_host_event()
910 		ret = cros_ec_cmd(ec->ec_dev, 0, EC_CMD_GET_FEATURES + ec->cmd_offset,  in cros_ec_check_features()
942 	struct cros_ec_device *ec_dev = ec->ec_dev;  in cros_ec_get_sensor_count()  local
958 	ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);  in cros_ec_get_sensor_count()
971 	if (sensor_count < 0 && ec->cmd_offset == 0 && ec_dev->cmd_readmem) {  in cros_ec_get_sensor_count()
972 		ret = ec_dev->cmd_readmem(ec_dev, EC_MEMMAP_ACC_STATUS,  in cros_ec_get_sensor_count()
1004 int cros_ec_cmd(struct cros_ec_device *ec_dev,  in cros_ec_cmd()  argument
1027 	ret = cros_ec_cmd_xfer_status(ec_dev, msg);  in cros_ec_cmd()