18 static int prepare_packet(struct cros_ec_device *ec_dev,  in prepare_packet()  argument
26 	BUG_ON(ec_dev->proto_version != EC_HOST_REQUEST_VERSION);  in prepare_packet()
27 	BUG_ON(msg->outsize + sizeof(*request) > ec_dev->dout_size);  in prepare_packet()
29 	out = ec_dev->dout;  in prepare_packet()
51 static int send_command(struct cros_ec_device *ec_dev,  in send_command()  argument
59 	if (ec_dev->proto_version > 2)  in send_command()
60 		xfer_fxn = ec_dev->pkt_xfer;  in send_command()
62 		xfer_fxn = ec_dev->cmd_xfer;  in send_command()
70 		dev_err_once(ec_dev->dev,  in send_command()
75 	ret = (*xfer_fxn)(ec_dev, msg);  in send_command()
98 			ret = (*xfer_fxn)(ec_dev, status_msg);  in send_command()
120 int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,  in cros_ec_prepare_tx()  argument
127 	if (ec_dev->proto_version > 2)  in cros_ec_prepare_tx()
128 		return prepare_packet(ec_dev, msg);  in cros_ec_prepare_tx()
131 	out = ec_dev->dout;  in cros_ec_prepare_tx()
144 int cros_ec_check_result(struct cros_ec_device *ec_dev,  in cros_ec_check_result()  argument
151 		dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",  in cros_ec_check_result()
155 		dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n",  in cros_ec_check_result()
175 static int cros_ec_get_host_event_wake_mask(struct cros_ec_device *ec_dev,  in cros_ec_get_host_event_wake_mask()  argument
187 	ret = send_command(ec_dev, msg);  in cros_ec_get_host_event_wake_mask()
196 static int cros_ec_host_command_proto_query(struct cros_ec_device *ec_dev,  in cros_ec_host_command_proto_query()  argument
208 	if (!ec_dev->pkt_xfer)  in cros_ec_host_command_proto_query()
215 	ret = send_command(ec_dev, msg);  in cros_ec_host_command_proto_query()
218 		dev_dbg(ec_dev->dev,  in cros_ec_host_command_proto_query()
232 static int cros_ec_host_command_proto_query_v2(struct cros_ec_device *ec_dev)  in cros_ec_host_command_proto_query_v2()  argument
253 	ret = send_command(ec_dev, msg);  in cros_ec_host_command_proto_query_v2()
256 		dev_dbg(ec_dev->dev,  in cros_ec_host_command_proto_query_v2()
261 		dev_err(ec_dev->dev,  in cros_ec_host_command_proto_query_v2()
267 		dev_err(ec_dev->dev,  in cros_ec_host_command_proto_query_v2()
297 static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev,  in cros_ec_get_host_command_version_mask()  argument
318 	ret = send_command(ec_dev, msg);  in cros_ec_get_host_command_version_mask()
329 int cros_ec_query_all(struct cros_ec_device *ec_dev)  in cros_ec_query_all()  argument
331 	struct device *dev = ec_dev->dev;  in cros_ec_query_all()
343 	ec_dev->proto_version = 3;  in cros_ec_query_all()
344 	ret = cros_ec_host_command_proto_query(ec_dev, 0, proto_msg);  in cros_ec_query_all()
349 		ec_dev->max_request = proto_info->max_request_packet_size -  in cros_ec_query_all()
351 		ec_dev->max_response = proto_info->max_response_packet_size -  in cros_ec_query_all()
353 		ec_dev->proto_version =  in cros_ec_query_all()
356 		dev_dbg(ec_dev->dev,  in cros_ec_query_all()
358 			ec_dev->proto_version);  in cros_ec_query_all()
360 		ec_dev->din_size = ec_dev->max_response +  in cros_ec_query_all()
363 		ec_dev->dout_size = ec_dev->max_request +  in cros_ec_query_all()
370 		ret = cros_ec_host_command_proto_query(ec_dev, 1, proto_msg);  in cros_ec_query_all()
373 			dev_dbg(ec_dev->dev, "no PD chip found: %d\n", ret);  in cros_ec_query_all()
374 			ec_dev->max_passthru = 0;  in cros_ec_query_all()
376 			dev_dbg(ec_dev->dev, "found PD chip\n");  in cros_ec_query_all()
377 			ec_dev->max_passthru =  in cros_ec_query_all()
383 		ec_dev->proto_version = 2;  in cros_ec_query_all()
384 		ret = cros_ec_host_command_proto_query_v2(ec_dev);  in cros_ec_query_all()
388 			dev_dbg(ec_dev->dev, "falling back to proto v2\n");  in cros_ec_query_all()
390 			ec_dev->max_request = EC_PROTO2_MAX_PARAM_SIZE;  in cros_ec_query_all()
391 			ec_dev->max_response = EC_PROTO2_MAX_PARAM_SIZE;  in cros_ec_query_all()
392 			ec_dev->max_passthru = 0;  in cros_ec_query_all()
393 			ec_dev->pkt_xfer = NULL;  in cros_ec_query_all()
394 			ec_dev->din_size = EC_PROTO2_MSG_BYTES;  in cros_ec_query_all()
395 			ec_dev->dout_size = EC_PROTO2_MSG_BYTES;  in cros_ec_query_all()
402 			ec_dev->proto_version = EC_PROTO_VERSION_UNKNOWN;  in cros_ec_query_all()
403 			dev_dbg(ec_dev->dev, "EC query failed: %d\n", ret);  in cros_ec_query_all()
408 	devm_kfree(dev, ec_dev->din);  in cros_ec_query_all()
409 	devm_kfree(dev, ec_dev->dout);  in cros_ec_query_all()
411 	ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);  in cros_ec_query_all()
412 	if (!ec_dev->din) {  in cros_ec_query_all()
417 	ec_dev->dout = devm_kzalloc(dev, ec_dev->dout_size, GFP_KERNEL);  in cros_ec_query_all()
418 	if (!ec_dev->dout) {  in cros_ec_query_all()
419 		devm_kfree(dev, ec_dev->din);  in cros_ec_query_all()
425 	ret = cros_ec_get_host_command_version_mask(ec_dev,  in cros_ec_query_all()
429 		ec_dev->mkbp_event_supported = 0;  in cros_ec_query_all()
431 		ec_dev->mkbp_event_supported = 1;  in cros_ec_query_all()
434 	ret = cros_ec_get_host_command_version_mask(ec_dev,  in cros_ec_query_all()
437 	ec_dev->host_sleep_v1 = (ret >= 0 && (ver_mask & EC_VER_MASK(1)));  in cros_ec_query_all()
443 	ret = cros_ec_get_host_event_wake_mask(ec_dev, proto_msg,  in cros_ec_query_all()
444 					       &ec_dev->host_event_wake_mask);  in cros_ec_query_all()
446 		ec_dev->host_event_wake_mask = U32_MAX;  in cros_ec_query_all()
456 int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer()  argument
461 	mutex_lock(&ec_dev->lock);  in cros_ec_cmd_xfer()
462 	if (ec_dev->proto_version == EC_PROTO_VERSION_UNKNOWN) {  in cros_ec_cmd_xfer()
463 		ret = cros_ec_query_all(ec_dev);  in cros_ec_cmd_xfer()
465 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
467 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
472 	if (msg->insize > ec_dev->max_response) {  in cros_ec_cmd_xfer()
473 		dev_dbg(ec_dev->dev, "clamping message receive buffer\n");  in cros_ec_cmd_xfer()
474 		msg->insize = ec_dev->max_response;  in cros_ec_cmd_xfer()
478 		if (msg->outsize > ec_dev->max_request) {  in cros_ec_cmd_xfer()
479 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
482 				ec_dev->max_request);  in cros_ec_cmd_xfer()
483 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
487 		if (msg->outsize > ec_dev->max_passthru) {  in cros_ec_cmd_xfer()
488 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
491 				ec_dev->max_passthru);  in cros_ec_cmd_xfer()
492 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
496 	ret = send_command(ec_dev, msg);  in cros_ec_cmd_xfer()
497 	mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
503 int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer_status()  argument
508 	ret = cros_ec_cmd_xfer(ec_dev, msg);  in cros_ec_cmd_xfer_status()
510 		dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret);  in cros_ec_cmd_xfer_status()
512 		dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);  in cros_ec_cmd_xfer_status()
520 static int get_next_event_xfer(struct cros_ec_device *ec_dev,  in get_next_event_xfer()  argument
531 	ret = cros_ec_cmd_xfer(ec_dev, msg);  in get_next_event_xfer()
533 		ec_dev->event_size = ret - 1;  in get_next_event_xfer()
534 		memcpy(&ec_dev->event_data, msg->data, ret);  in get_next_event_xfer()
540 static int get_next_event(struct cros_ec_device *ec_dev)  in get_next_event()  argument
542 	u8 buffer[sizeof(struct cros_ec_command) + sizeof(ec_dev->event_data)];  in get_next_event()
547 	if (ec_dev->suspended) {  in get_next_event()
548 		dev_dbg(ec_dev->dev, "Device suspended.\n");  in get_next_event()
553 		ret = get_next_event_xfer(ec_dev, msg, cmd_version,  in get_next_event()
562 	ret = get_next_event_xfer(ec_dev, msg, cmd_version,  in get_next_event()
568 static int get_keyboard_state_event(struct cros_ec_device *ec_dev)  in get_keyboard_state_event()  argument
571 		  sizeof(ec_dev->event_data.data)];  in get_keyboard_state_event()
576 	msg->insize = sizeof(ec_dev->event_data.data);  in get_keyboard_state_event()
579 	ec_dev->event_size = cros_ec_cmd_xfer(ec_dev, msg);  in get_keyboard_state_event()
580 	ec_dev->event_data.event_type = EC_MKBP_EVENT_KEY_MATRIX;  in get_keyboard_state_event()
581 	memcpy(&ec_dev->event_data.data, msg->data,  in get_keyboard_state_event()
582 	       sizeof(ec_dev->event_data.data));  in get_keyboard_state_event()
584 	return ec_dev->event_size;  in get_keyboard_state_event()
587 int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event)  in cros_ec_get_next_event()  argument
593 	if (!ec_dev->mkbp_event_supported) {  in cros_ec_get_next_event()
594 		ret = get_keyboard_state_event(ec_dev);  in cros_ec_get_next_event()
604 	ret = get_next_event(ec_dev);  in cros_ec_get_next_event()
609 		event_type = ec_dev->event_data.event_type;  in cros_ec_get_next_event()
610 		host_event = cros_ec_get_host_event(ec_dev);  in cros_ec_get_next_event()
620 			 !(host_event & ec_dev->host_event_wake_mask))  in cros_ec_get_next_event()
631 u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev)  in cros_ec_get_host_event()  argument
635 	BUG_ON(!ec_dev->mkbp_event_supported);  in cros_ec_get_host_event()
637 	if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT)  in cros_ec_get_host_event()
640 	if (ec_dev->event_size != sizeof(host_event)) {  in cros_ec_get_host_event()
641 		dev_warn(ec_dev->dev, "Invalid host event size\n");  in cros_ec_get_host_event()
645 	host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);  in cros_ec_get_host_event()