2 // Debug logs for the ChromeOS EC
21 #define DRV_NAME "cros-ec-debugfs"
31 MODULE_PARM_DESC(log_poll_period_ms, "EC log polling period(ms)");
37  * struct cros_ec_debugfs - EC debugging information.
39  * @ec: EC device this debugfs information belongs to
42  * @read_msg: preallocated EC command and buffer to read console log
44  * @log_poll_work: recurring task to poll EC for new console log data
47  *                  when EC panic
50 	struct cros_ec_dev *ec;  member
52 	/* EC log */
57 	/* EC panicinfo */
63  * We need to make sure that the EC log buffer on the UART is large enough,
72 	struct cros_ec_dev *ec = debug_info->ec;  in cros_ec_console_log_work()  local
75 		.command = EC_CMD_CONSOLE_SNAPSHOT + ec->cmd_offset,  in cros_ec_console_log_work()
85 	ret = cros_ec_cmd_xfer_status(ec->ec_dev, &snapshot_msg);  in cros_ec_console_log_work()
95 			dev_info_once(ec->dev,  in cros_ec_console_log_work()
102 		ret = cros_ec_cmd_xfer_status(ec->ec_dev,  in cros_ec_console_log_work()
209 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_pdinfo_read()
277 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_uptime_read()
323 static int ec_read_version_supported(struct cros_ec_dev *ec)  in ec_read_version_supported()  argument
337 	msg->command = EC_CMD_GET_CMD_VERSIONS + ec->cmd_offset;  in ec_read_version_supported()
345 	ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg) >= 0 &&  in ec_read_version_supported()
355 	struct cros_ec_dev *ec = debug_info->ec;  in cros_ec_create_console_log()  local
364 	if (!ec_read_version_supported(ec))  in cros_ec_create_console_log()
367 	buf = devm_kzalloc(ec->dev, LOG_SIZE, GFP_KERNEL);  in cros_ec_create_console_log()
372 	read_response_size = ec->ec_dev->max_response;  in cros_ec_create_console_log()
373 	debug_info->read_msg = devm_kzalloc(ec->dev,  in cros_ec_create_console_log()
380 	debug_info->read_msg->command = EC_CMD_CONSOLE_READ + ec->cmd_offset;  in cros_ec_create_console_log()
409  * Returns the size of the panicinfo data fetched from the EC
440 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_create_panicinfo()
444 	data = devm_kzalloc(debug_info->ec->dev, ec_dev->max_response,  in cros_ec_create_panicinfo()
468 	devm_kfree(debug_info->ec->dev, data);  in cros_ec_create_panicinfo()
490 	struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent);  in cros_ec_debugfs_probe()  local
491 	struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev);  in cros_ec_debugfs_probe()
496 	debug_info = devm_kzalloc(ec->dev, sizeof(*debug_info), GFP_KERNEL);  in cros_ec_debugfs_probe()
500 	debug_info->ec = ec;  in cros_ec_debugfs_probe()
514 	if (cros_ec_uptime_is_supported(ec->ec_dev))  in cros_ec_debugfs_probe()
519 			   &ec->ec_dev->last_resume_result);  in cros_ec_debugfs_probe()
522 			   &ec->ec_dev->suspend_timeout_ms);  in cros_ec_debugfs_probe()
525 	ret = blocking_notifier_chain_register(&ec->ec_dev->panic_notifier,  in cros_ec_debugfs_probe()
530 	ec->debug_info = debug_info;  in cros_ec_debugfs_probe()
532 	dev_set_drvdata(&pd->dev, ec);  in cros_ec_debugfs_probe()
543 	struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent);  in cros_ec_debugfs_remove()  local
545 	debugfs_remove_recursive(ec->debug_info->dir);  in cros_ec_debugfs_remove()
546 	cros_ec_cleanup_console_log(ec->debug_info);  in cros_ec_debugfs_remove()
551 	struct cros_ec_dev *ec = dev_get_drvdata(dev);  in cros_ec_debugfs_suspend()  local
553 	if (ec->debug_info->log_buffer.buf)  in cros_ec_debugfs_suspend()
554 		cancel_delayed_work_sync(&ec->debug_info->log_poll_work);  in cros_ec_debugfs_suspend()
561 	struct cros_ec_dev *ec = dev_get_drvdata(dev);  in cros_ec_debugfs_resume()  local
563 	if (ec->debug_info->log_buffer.buf)  in cros_ec_debugfs_resume()
564 		schedule_delayed_work(&ec->debug_info->log_poll_work, 0);  in cros_ec_debugfs_resume()
592 MODULE_DESCRIPTION("Debug logs for ChromeOS EC");