/**************************************************************************/ /* */ /* Copyright (c) Microsoft Corporation. All rights reserved. */ /* */ /* This software is licensed under the Microsoft Software License */ /* Terms for Microsoft Azure RTOS. Full text of the license can be */ /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ /* and in the root directory of this software. */ /* */ /**************************************************************************/ /**************************************************************************/ /**************************************************************************/ /** */ /** USBX Component */ /** */ /** Printer Class */ /** */ /**************************************************************************/ /**************************************************************************/ /* Include necessary system files. */ #define UX_SOURCE_CODE #include "ux_api.h" #include "ux_host_class_printer.h" #include "ux_host_stack.h" /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _ux_host_class_printer_status_get PORTABLE C */ /* 6.1.12 */ /* AUTHOR */ /* */ /* Chaoqiong Xiao, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function obtains the printer status. The printer status is */ /* similar to the LPT status (1284 standard). */ /* */ /* INPUT */ /* */ /* printer Pointer to printer class */ /* printer_status Pointer to return status */ /* */ /* OUTPUT */ /* */ /* Completion Status */ /* */ /* CALLS */ /* */ /* _ux_host_stack_class_instance_verify Verify the class instance */ /* _ux_host_stack_transfer_request Process transfer request */ /* _ux_utility_long_get Get 32-bit long word */ /* _ux_utility_memory_allocate Allocate memory block */ /* _ux_utility_memory_free Free memory block */ /* _ux_host_semaphore_get Get protection semaphore */ /* _ux_host_semaphore_put Release protection semaphore */ /* */ /* CALLED BY */ /* */ /* Application */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ /* resulting in version 6.1 */ /* 02-02-2021 Chaoqiong Xiao Modified comment(s), */ /* supported interface other */ /* than number zero, */ /* resulting in version 6.1.4 */ /* 01-31-2022 Chaoqiong Xiao Modified comment(s), */ /* added standalone support, */ /* resulting in version 6.1.10 */ /* 07-29-2022 Chaoqiong Xiao Modified comment(s), */ /* fixed parameter/variable */ /* names conflict C++ keyword, */ /* resulting in version 6.1.12 */ /* */ /**************************************************************************/ UINT _ux_host_class_printer_status_get(UX_HOST_CLASS_PRINTER *printer, ULONG *printer_status) { #if defined(UX_HOST_STANDALONE) UX_INTERRUPT_SAVE_AREA #endif UX_INTERFACE *interface_ptr; UX_ENDPOINT *control_endpoint; UX_TRANSFER *transfer_request; UINT status; UCHAR * printer_status_buffer; /* Ensure the instance is valid. */ if (printer -> ux_host_class_printer_state != UX_HOST_CLASS_INSTANCE_LIVE) { /* If trace is enabled, insert this event into the trace buffer. */ UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_INSTANCE_UNKNOWN, printer, 0, 0, UX_TRACE_ERRORS, 0, 0) return(UX_HOST_CLASS_INSTANCE_UNKNOWN); } #if defined(UX_HOST_STANDALONE) UX_DISABLE if ((printer -> ux_host_class_printer_flags & UX_HOST_CLASS_PRINTER_FLAG_LOCK) || (printer -> ux_host_class_printer_device -> ux_device_flags & UX_DEVICE_FLAG_LOCK)) { UX_RESTORE return(UX_BUSY); } printer -> ux_host_class_printer_flags |= UX_HOST_CLASS_PRINTER_FLAG_LOCK; printer -> ux_host_class_printer_device -> ux_device_flags |= UX_DEVICE_FLAG_LOCK; UX_RESTORE #else /* Protect thread reentry to this instance. */ status = _ux_host_semaphore_get(&printer -> ux_host_class_printer_semaphore, UX_WAIT_FOREVER); if (status != UX_SUCCESS) /* Return error. */ return(status); /* Protect the control endpoint semaphore here. It will be unprotected in the transfer request function. */ status = _ux_utility_semaphore_get(&printer -> ux_host_class_printer_device -> ux_device_protection_semaphore, UX_WAIT_FOREVER); /* Check for status. */ if (status != UX_SUCCESS) { _ux_utility_semaphore_put(&printer -> ux_host_class_printer_semaphore); return(status); } #endif /* We need to get the default control endpoint transfer_request pointer. */ control_endpoint = &printer -> ux_host_class_printer_device -> ux_device_control_endpoint; transfer_request = &control_endpoint -> ux_endpoint_transfer_request; /* Need to allocate memory for the descriptor. */ printer_status_buffer = _ux_utility_memory_allocate(UX_SAFE_ALIGN, UX_CACHE_SAFE_MEMORY, UX_HOST_CLASS_PRINTER_STATUS_LENGTH); if (printer_status_buffer == UX_NULL) { /* Unprotect thread reentry to this instance */ _ux_host_class_printer_unlock(printer); return(UX_MEMORY_INSUFFICIENT); } /* Need interface for wIndex. */ interface_ptr = printer -> ux_host_class_printer_interface; /* Create a transfer_request for the GET_STATUS request. */ transfer_request -> ux_transfer_request_data_pointer = printer_status_buffer; transfer_request -> ux_transfer_request_requested_length = UX_HOST_CLASS_PRINTER_STATUS_LENGTH; transfer_request -> ux_transfer_request_function = UX_HOST_CLASS_PRINTER_GET_STATUS; transfer_request -> ux_transfer_request_type = UX_REQUEST_IN | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE; transfer_request -> ux_transfer_request_value = 0; transfer_request -> ux_transfer_request_index = interface_ptr -> ux_interface_descriptor.bInterfaceNumber; #if defined(UX_HOST_STANDALONE) /* Enable auto unlock device. */ transfer_request -> ux_transfer_request_flags |= UX_TRANSFER_FLAG_AUTO_DEVICE_UNLOCK; #endif /* Send request to HCD layer. */ status = _ux_host_stack_transfer_request(transfer_request); /* Check for correct transfer and entire descriptor returned. */ if ((status == UX_SUCCESS) && (transfer_request -> ux_transfer_request_actual_length > 0) && (transfer_request -> ux_transfer_request_actual_length <= UX_HOST_CLASS_PRINTER_STATUS_LENGTH)) { /* Retrieve the printer status and translate it locally for endianness. */ *printer_status = printer_status_buffer[0]; if (transfer_request -> ux_transfer_request_actual_length > 1) *printer_status |= (ULONG)(printer_status_buffer[1] << 8); if (transfer_request -> ux_transfer_request_actual_length > 2) *printer_status |= (ULONG)(printer_status_buffer[2] << 16); if (transfer_request -> ux_transfer_request_actual_length > 3) *printer_status |= (ULONG)(printer_status_buffer[3] << 24); /* If trace is enabled, insert this event into the trace buffer. */ UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_PRINTER_STATUS_GET, printer, *printer_status, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0) } else { /* Error trap. */ _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, status); } /* Free all used resources. */ _ux_utility_memory_free(printer_status_buffer); /* Unprotect thread reentry to this instance. */ _ux_host_class_printer_unlock(printer); /* Return completion status. */ return(status); }