2 // Debug logs for the ChromeOS EC
20 #define DRV_NAME "cros-ec-debugfs"
32  * struct cros_ec_debugfs - EC debugging information.
34  * @ec: EC device this debugfs information belongs to
37  * @read_msg: preallocated EC command and buffer to read console log
39  * @log_poll_work: recurring task to poll EC for new console log data
42  *                  when EC panic
45 	struct cros_ec_dev *ec;  member
47 	/* EC log */
52 	/* EC panicinfo */
58  * We need to make sure that the EC log buffer on the UART is large enough,
67 	struct cros_ec_dev *ec = debug_info->ec;  in cros_ec_console_log_work()  local
70 		.command = EC_CMD_CONSOLE_SNAPSHOT + ec->cmd_offset,  in cros_ec_console_log_work()
80 	ret = cros_ec_cmd_xfer_status(ec->ec_dev, &snapshot_msg);  in cros_ec_console_log_work()
90 			dev_info_once(ec->dev,  in cros_ec_console_log_work()
97 		ret = cros_ec_cmd_xfer_status(ec->ec_dev,  in cros_ec_console_log_work()
204 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_pdinfo_read()
272 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_uptime_read()
319 static int ec_read_version_supported(struct cros_ec_dev *ec)  in ec_read_version_supported()  argument
333 	msg->command = EC_CMD_GET_CMD_VERSIONS + ec->cmd_offset;  in ec_read_version_supported()
341 	ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg) >= 0 &&  in ec_read_version_supported()
351 	struct cros_ec_dev *ec = debug_info->ec;  in cros_ec_create_console_log()  local
360 	if (!ec_read_version_supported(ec))  in cros_ec_create_console_log()
363 	buf = devm_kzalloc(ec->dev, LOG_SIZE, GFP_KERNEL);  in cros_ec_create_console_log()
368 	read_response_size = ec->ec_dev->max_response;  in cros_ec_create_console_log()
369 	debug_info->read_msg = devm_kzalloc(ec->dev,  in cros_ec_create_console_log()
376 	debug_info->read_msg->command = EC_CMD_CONSOLE_READ + ec->cmd_offset;  in cros_ec_create_console_log()
405  * Returns the size of the panicinfo data fetched from the EC
436 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_create_panicinfo()
440 	data = devm_kzalloc(debug_info->ec->dev, ec_dev->max_response,  in cros_ec_create_panicinfo()
464 	devm_kfree(debug_info->ec->dev, data);  in cros_ec_create_panicinfo()
486 	struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent);  in cros_ec_debugfs_probe()  local
487 	struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev);  in cros_ec_debugfs_probe()
492 	debug_info = devm_kzalloc(ec->dev, sizeof(*debug_info), GFP_KERNEL);  in cros_ec_debugfs_probe()
496 	debug_info->ec = ec;  in cros_ec_debugfs_probe()
510 	if (cros_ec_uptime_is_supported(ec->ec_dev))  in cros_ec_debugfs_probe()
515 			   &ec->ec_dev->last_resume_result);  in cros_ec_debugfs_probe()
518 			   &ec->ec_dev->suspend_timeout_ms);  in cros_ec_debugfs_probe()
521 	ret = blocking_notifier_chain_register(&ec->ec_dev->panic_notifier,  in cros_ec_debugfs_probe()
526 	ec->debug_info = debug_info;  in cros_ec_debugfs_probe()
528 	dev_set_drvdata(&pd->dev, ec);  in cros_ec_debugfs_probe()
539 	struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent);  in cros_ec_debugfs_remove()  local
541 	debugfs_remove_recursive(ec->debug_info->dir);  in cros_ec_debugfs_remove()
542 	cros_ec_cleanup_console_log(ec->debug_info);  in cros_ec_debugfs_remove()
549 	struct cros_ec_dev *ec = dev_get_drvdata(dev);  in cros_ec_debugfs_suspend()  local
551 	if (ec->debug_info->log_buffer.buf)  in cros_ec_debugfs_suspend()
552 		cancel_delayed_work_sync(&ec->debug_info->log_poll_work);  in cros_ec_debugfs_suspend()
559 	struct cros_ec_dev *ec = dev_get_drvdata(dev);  in cros_ec_debugfs_resume()  local
561 	if (ec->debug_info->log_buffer.buf)  in cros_ec_debugfs_resume()
562 		schedule_delayed_work(&ec->debug_info->log_poll_work, 0);  in cros_ec_debugfs_resume()
583 MODULE_DESCRIPTION("Debug logs for ChromeOS EC");