26 static int prepare_packet(struct cros_ec_device *ec_dev,  in prepare_packet()  argument
34 	BUG_ON(ec_dev->proto_version != EC_HOST_REQUEST_VERSION);  in prepare_packet()
35 	BUG_ON(msg->outsize + sizeof(*request) > ec_dev->dout_size);  in prepare_packet()
37 	out = ec_dev->dout;  in prepare_packet()
59 static int send_command(struct cros_ec_device *ec_dev,  in send_command()  argument
65 	if (ec_dev->proto_version > 2)  in send_command()
66 		xfer_fxn = ec_dev->pkt_xfer;  in send_command()
68 		xfer_fxn = ec_dev->cmd_xfer;  in send_command()
70 	ret = (*xfer_fxn)(ec_dev, msg);  in send_command()
93 			ret = (*xfer_fxn)(ec_dev, status_msg);  in send_command()
115 int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,  in cros_ec_prepare_tx()  argument
122 	if (ec_dev->proto_version > 2)  in cros_ec_prepare_tx()
123 		return prepare_packet(ec_dev, msg);  in cros_ec_prepare_tx()
126 	out = ec_dev->dout;  in cros_ec_prepare_tx()
139 int cros_ec_check_result(struct cros_ec_device *ec_dev,  in cros_ec_check_result()  argument
146 		dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",  in cros_ec_check_result()
150 		dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n",  in cros_ec_check_result()
170 static int cros_ec_get_host_event_wake_mask(struct cros_ec_device *ec_dev,  in cros_ec_get_host_event_wake_mask()  argument
182 	ret = send_command(ec_dev, msg);  in cros_ec_get_host_event_wake_mask()
191 static int cros_ec_host_command_proto_query(struct cros_ec_device *ec_dev,  in cros_ec_host_command_proto_query()  argument
203 	if (!ec_dev->pkt_xfer)  in cros_ec_host_command_proto_query()
210 	ret = send_command(ec_dev, msg);  in cros_ec_host_command_proto_query()
213 		dev_dbg(ec_dev->dev,  in cros_ec_host_command_proto_query()
227 static int cros_ec_host_command_proto_query_v2(struct cros_ec_device *ec_dev)  in cros_ec_host_command_proto_query_v2()  argument
248 	ret = send_command(ec_dev, msg);  in cros_ec_host_command_proto_query_v2()
251 		dev_dbg(ec_dev->dev,  in cros_ec_host_command_proto_query_v2()
256 		dev_err(ec_dev->dev,  in cros_ec_host_command_proto_query_v2()
262 		dev_err(ec_dev->dev,  in cros_ec_host_command_proto_query_v2()
292 static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev,  in cros_ec_get_host_command_version_mask()  argument
313 	ret = send_command(ec_dev, msg);  in cros_ec_get_host_command_version_mask()
324 int cros_ec_query_all(struct cros_ec_device *ec_dev)  in cros_ec_query_all()  argument
326 	struct device *dev = ec_dev->dev;  in cros_ec_query_all()
338 	ec_dev->proto_version = 3;  in cros_ec_query_all()
339 	ret = cros_ec_host_command_proto_query(ec_dev, 0, proto_msg);  in cros_ec_query_all()
344 		ec_dev->max_request = proto_info->max_request_packet_size -  in cros_ec_query_all()
346 		ec_dev->max_response = proto_info->max_response_packet_size -  in cros_ec_query_all()
348 		ec_dev->proto_version =  in cros_ec_query_all()
351 		dev_dbg(ec_dev->dev,  in cros_ec_query_all()
353 			ec_dev->proto_version);  in cros_ec_query_all()
355 		ec_dev->din_size = ec_dev->max_response +  in cros_ec_query_all()
358 		ec_dev->dout_size = ec_dev->max_request +  in cros_ec_query_all()
365 		ret = cros_ec_host_command_proto_query(ec_dev, 1, proto_msg);  in cros_ec_query_all()
368 			dev_dbg(ec_dev->dev, "no PD chip found: %d\n", ret);  in cros_ec_query_all()
369 			ec_dev->max_passthru = 0;  in cros_ec_query_all()
371 			dev_dbg(ec_dev->dev, "found PD chip\n");  in cros_ec_query_all()
372 			ec_dev->max_passthru =  in cros_ec_query_all()
378 		ec_dev->proto_version = 2;  in cros_ec_query_all()
379 		ret = cros_ec_host_command_proto_query_v2(ec_dev);  in cros_ec_query_all()
383 			dev_dbg(ec_dev->dev, "falling back to proto v2\n");  in cros_ec_query_all()
385 			ec_dev->max_request = EC_PROTO2_MAX_PARAM_SIZE;  in cros_ec_query_all()
386 			ec_dev->max_response = EC_PROTO2_MAX_PARAM_SIZE;  in cros_ec_query_all()
387 			ec_dev->max_passthru = 0;  in cros_ec_query_all()
388 			ec_dev->pkt_xfer = NULL;  in cros_ec_query_all()
389 			ec_dev->din_size = EC_PROTO2_MSG_BYTES;  in cros_ec_query_all()
390 			ec_dev->dout_size = EC_PROTO2_MSG_BYTES;  in cros_ec_query_all()
397 			ec_dev->proto_version = EC_PROTO_VERSION_UNKNOWN;  in cros_ec_query_all()
398 			dev_dbg(ec_dev->dev, "EC query failed: %d\n", ret);  in cros_ec_query_all()
403 	devm_kfree(dev, ec_dev->din);  in cros_ec_query_all()
404 	devm_kfree(dev, ec_dev->dout);  in cros_ec_query_all()
406 	ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);  in cros_ec_query_all()
407 	if (!ec_dev->din) {  in cros_ec_query_all()
412 	ec_dev->dout = devm_kzalloc(dev, ec_dev->dout_size, GFP_KERNEL);  in cros_ec_query_all()
413 	if (!ec_dev->dout) {  in cros_ec_query_all()
414 		devm_kfree(dev, ec_dev->din);  in cros_ec_query_all()
420 	ret = cros_ec_get_host_command_version_mask(ec_dev,  in cros_ec_query_all()
424 		ec_dev->mkbp_event_supported = 0;  in cros_ec_query_all()
426 		ec_dev->mkbp_event_supported = 1;  in cros_ec_query_all()
432 	ret = cros_ec_get_host_event_wake_mask(ec_dev, proto_msg,  in cros_ec_query_all()
433 					       &ec_dev->host_event_wake_mask);  in cros_ec_query_all()
435 		ec_dev->host_event_wake_mask = U32_MAX;  in cros_ec_query_all()
445 int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer()  argument
450 	mutex_lock(&ec_dev->lock);  in cros_ec_cmd_xfer()
451 	if (ec_dev->proto_version == EC_PROTO_VERSION_UNKNOWN) {  in cros_ec_cmd_xfer()
452 		ret = cros_ec_query_all(ec_dev);  in cros_ec_cmd_xfer()
454 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
456 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
461 	if (msg->insize > ec_dev->max_response) {  in cros_ec_cmd_xfer()
462 		dev_dbg(ec_dev->dev, "clamping message receive buffer\n");  in cros_ec_cmd_xfer()
463 		msg->insize = ec_dev->max_response;  in cros_ec_cmd_xfer()
467 		if (msg->outsize > ec_dev->max_request) {  in cros_ec_cmd_xfer()
468 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
471 				ec_dev->max_request);  in cros_ec_cmd_xfer()
472 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
476 		if (msg->outsize > ec_dev->max_passthru) {  in cros_ec_cmd_xfer()
477 			dev_err(ec_dev->dev,  in cros_ec_cmd_xfer()
480 				ec_dev->max_passthru);  in cros_ec_cmd_xfer()
481 			mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
485 	ret = send_command(ec_dev, msg);  in cros_ec_cmd_xfer()
486 	mutex_unlock(&ec_dev->lock);  in cros_ec_cmd_xfer()
492 int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,  in cros_ec_cmd_xfer_status()  argument
497 	ret = cros_ec_cmd_xfer(ec_dev, msg);  in cros_ec_cmd_xfer_status()
499 		dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret);  in cros_ec_cmd_xfer_status()
501 		dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);  in cros_ec_cmd_xfer_status()
509 static int get_next_event_xfer(struct cros_ec_device *ec_dev,  in get_next_event_xfer()  argument
520 	ret = cros_ec_cmd_xfer(ec_dev, msg);  in get_next_event_xfer()
522 		ec_dev->event_size = ret - 1;  in get_next_event_xfer()
523 		memcpy(&ec_dev->event_data, msg->data, ret);  in get_next_event_xfer()
529 static int get_next_event(struct cros_ec_device *ec_dev)  in get_next_event()  argument
531 	u8 buffer[sizeof(struct cros_ec_command) + sizeof(ec_dev->event_data)];  in get_next_event()
536 	if (ec_dev->suspended) {  in get_next_event()
537 		dev_dbg(ec_dev->dev, "Device suspended.\n");  in get_next_event()
542 		ret = get_next_event_xfer(ec_dev, msg, cmd_version,  in get_next_event()
551 	ret = get_next_event_xfer(ec_dev, msg, cmd_version,  in get_next_event()
557 static int get_keyboard_state_event(struct cros_ec_device *ec_dev)  in get_keyboard_state_event()  argument
560 		  sizeof(ec_dev->event_data.data)];  in get_keyboard_state_event()
565 	msg->insize = sizeof(ec_dev->event_data.data);  in get_keyboard_state_event()
568 	ec_dev->event_size = cros_ec_cmd_xfer(ec_dev, msg);  in get_keyboard_state_event()
569 	ec_dev->event_data.event_type = EC_MKBP_EVENT_KEY_MATRIX;  in get_keyboard_state_event()
570 	memcpy(&ec_dev->event_data.data, msg->data,  in get_keyboard_state_event()
571 	       sizeof(ec_dev->event_data.data));  in get_keyboard_state_event()
573 	return ec_dev->event_size;  in get_keyboard_state_event()
576 int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event)  in cros_ec_get_next_event()  argument
581 	if (!ec_dev->mkbp_event_supported) {  in cros_ec_get_next_event()
582 		ret = get_keyboard_state_event(ec_dev);  in cros_ec_get_next_event()
592 	ret = get_next_event(ec_dev);  in cros_ec_get_next_event()
597 		host_event = cros_ec_get_host_event(ec_dev);  in cros_ec_get_next_event()
601 			      !!(host_event & ec_dev->host_event_wake_mask);  in cros_ec_get_next_event()
608 u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev)  in cros_ec_get_host_event()  argument
612 	BUG_ON(!ec_dev->mkbp_event_supported);  in cros_ec_get_host_event()
614 	if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT)  in cros_ec_get_host_event()
617 	if (ec_dev->event_size != sizeof(host_event)) {  in cros_ec_get_host_event()
618 		dev_warn(ec_dev->dev, "Invalid host event size\n");  in cros_ec_get_host_event()
622 	host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);  in cros_ec_get_host_event()