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
43 	struct cros_ec_dev *ec;  member
45 	/* EC log */
50 	/* EC panicinfo */
55  * We need to make sure that the EC log buffer on the UART is large enough,
64 	struct cros_ec_dev *ec = debug_info->ec;  in cros_ec_console_log_work()  local
67 		.command = EC_CMD_CONSOLE_SNAPSHOT + ec->cmd_offset,  in cros_ec_console_log_work()
77 	ret = cros_ec_cmd_xfer_status(ec->ec_dev, &snapshot_msg);  in cros_ec_console_log_work()
87 			dev_info_once(ec->dev,  in cros_ec_console_log_work()
94 		ret = cros_ec_cmd_xfer_status(ec->ec_dev,  in cros_ec_console_log_work()
201 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_pdinfo_read()
269 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_uptime_read()
316 static int ec_read_version_supported(struct cros_ec_dev *ec)  in ec_read_version_supported()  argument
329 	msg->command = EC_CMD_GET_CMD_VERSIONS + ec->cmd_offset;  in ec_read_version_supported()
337 	ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg) >= 0 &&  in ec_read_version_supported()
347 	struct cros_ec_dev *ec = debug_info->ec;  in cros_ec_create_console_log()  local
356 	if (!ec_read_version_supported(ec))  in cros_ec_create_console_log()
359 	buf = devm_kzalloc(ec->dev, LOG_SIZE, GFP_KERNEL);  in cros_ec_create_console_log()
364 	read_response_size = ec->ec_dev->max_response;  in cros_ec_create_console_log()
365 	debug_info->read_msg = devm_kzalloc(ec->dev,  in cros_ec_create_console_log()
372 	debug_info->read_msg->command = EC_CMD_CONSOLE_READ + ec->cmd_offset;  in cros_ec_create_console_log()
402 	struct cros_ec_device *ec_dev = debug_info->ec->ec_dev;  in cros_ec_create_panicinfo()
409 	msg = devm_kzalloc(debug_info->ec->dev,  in cros_ec_create_panicinfo()
436 	devm_kfree(debug_info->ec->dev, msg);  in cros_ec_create_panicinfo()
442 	struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent);  in cros_ec_debugfs_probe()  local
443 	struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev);  in cros_ec_debugfs_probe()
448 	debug_info = devm_kzalloc(ec->dev, sizeof(*debug_info), GFP_KERNEL);  in cros_ec_debugfs_probe()
452 	debug_info->ec = ec;  in cros_ec_debugfs_probe()
466 	if (cros_ec_uptime_is_supported(ec->ec_dev))  in cros_ec_debugfs_probe()
471 			   &ec->ec_dev->last_resume_result);  in cros_ec_debugfs_probe()
474 			   &ec->ec_dev->suspend_timeout_ms);  in cros_ec_debugfs_probe()
476 	ec->debug_info = debug_info;  in cros_ec_debugfs_probe()
478 	dev_set_drvdata(&pd->dev, ec);  in cros_ec_debugfs_probe()
489 	struct cros_ec_dev *ec = dev_get_drvdata(pd->dev.parent);  in cros_ec_debugfs_remove()  local
491 	debugfs_remove_recursive(ec->debug_info->dir);  in cros_ec_debugfs_remove()
492 	cros_ec_cleanup_console_log(ec->debug_info);  in cros_ec_debugfs_remove()
499 	struct cros_ec_dev *ec = dev_get_drvdata(dev);  in cros_ec_debugfs_suspend()  local
501 	if (ec->debug_info->log_buffer.buf)  in cros_ec_debugfs_suspend()
502 		cancel_delayed_work_sync(&ec->debug_info->log_poll_work);  in cros_ec_debugfs_suspend()
509 	struct cros_ec_dev *ec = dev_get_drvdata(dev);  in cros_ec_debugfs_resume()  local
511 	if (ec->debug_info->log_buffer.buf)  in cros_ec_debugfs_resume()
512 		schedule_delayed_work(&ec->debug_info->log_poll_work, 0);  in cros_ec_debugfs_resume()
532 MODULE_DESCRIPTION("Debug logs for ChromeOS EC");