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Diffstat (limited to 'lib/lufa/Demos/Device/LowLevel/MassStorage/MassStorage.c')
| -rw-r--r-- | lib/lufa/Demos/Device/LowLevel/MassStorage/MassStorage.c | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/lib/lufa/Demos/Device/LowLevel/MassStorage/MassStorage.c b/lib/lufa/Demos/Device/LowLevel/MassStorage/MassStorage.c deleted file mode 100644 index f30969c67..000000000 --- a/lib/lufa/Demos/Device/LowLevel/MassStorage/MassStorage.c +++ /dev/null @@ -1,332 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2017. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, distribute, and sell this - software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in - all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaims all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * - * Main source file for the Mass Storage demo. This file contains the main tasks of the demo and - * is responsible for the initial application hardware configuration. - */ - -#define INCLUDE_FROM_MASSSTORAGE_C -#include "MassStorage.h" - -/** Structure to hold the latest Command Block Wrapper issued by the host, containing a SCSI command to execute. */ -MS_CommandBlockWrapper_t CommandBlock; - -/** Structure to hold the latest Command Status Wrapper to return to the host, containing the status of the last issued command. */ -MS_CommandStatusWrapper_t CommandStatus = { .Signature = MS_CSW_SIGNATURE }; - -/** Flag to asynchronously abort any in-progress data transfers upon the reception of a mass storage reset command. */ -volatile bool IsMassStoreReset = false; - - -/** Main program entry point. This routine configures the hardware required by the application, then - * enters a loop to run the application tasks in sequence. - */ -int main(void) -{ - SetupHardware(); - - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); - GlobalInterruptEnable(); - - for (;;) - { - MassStorage_Task(); - USB_USBTask(); - } -} - -/** Configures the board hardware and chip peripherals for the demo's functionality. */ -void SetupHardware(void) -{ -#if (ARCH == ARCH_AVR8) - /* Disable watchdog if enabled by bootloader/fuses */ - MCUSR &= ~(1 << WDRF); - wdt_disable(); - - /* Disable clock division */ - clock_prescale_set(clock_div_1); -#elif (ARCH == ARCH_XMEGA) - /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */ - XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU); - XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL); - - /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */ - XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ); - XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB); - - PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm; -#endif - - /* Hardware Initialization */ - LEDs_Init(); - Dataflash_Init(); - USB_Init(); - - /* Check if the Dataflash is working, abort if not */ - if (!(DataflashManager_CheckDataflashOperation())) - { - LEDs_SetAllLEDs(LEDMASK_USB_ERROR); - for(;;); - } - - /* Clear Dataflash sector protections, if enabled */ - DataflashManager_ResetDataflashProtections(); -} - -/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */ -void EVENT_USB_Device_Connect(void) -{ - /* Indicate USB enumerating */ - LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); - - /* Reset the MSReset flag upon connection */ - IsMassStoreReset = false; -} - -/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via - * the status LEDs and stops the Mass Storage management task. - */ -void EVENT_USB_Device_Disconnect(void) -{ - /* Indicate USB not ready */ - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); -} - -/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration - * of the USB device after enumeration - the device endpoints are configured and the Mass Storage management task started. - */ -void EVENT_USB_Device_ConfigurationChanged(void) -{ - bool ConfigSuccess = true; - - /* Setup Mass Storage Data Endpoints */ - ConfigSuccess &= Endpoint_ConfigureEndpoint(MASS_STORAGE_IN_EPADDR, EP_TYPE_BULK, MASS_STORAGE_IO_EPSIZE, 1); - ConfigSuccess &= Endpoint_ConfigureEndpoint(MASS_STORAGE_OUT_EPADDR, EP_TYPE_BULK, MASS_STORAGE_IO_EPSIZE, 1); - - /* Indicate endpoint configuration success or failure */ - LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); -} - -/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to - * the device from the USB host before passing along unhandled control requests to the library for processing - * internally. - */ -void EVENT_USB_Device_ControlRequest(void) -{ - /* Process UFI specific control requests */ - switch (USB_ControlRequest.bRequest) - { - case MS_REQ_MassStorageReset: - if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) - { - Endpoint_ClearSETUP(); - Endpoint_ClearStatusStage(); - - /* Indicate that the current transfer should be aborted */ - IsMassStoreReset = true; - } - - break; - case MS_REQ_GetMaxLUN: - if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) - { - Endpoint_ClearSETUP(); - - /* Indicate to the host the number of supported LUNs (virtual disks) on the device */ - Endpoint_Write_8(TOTAL_LUNS - 1); - - Endpoint_ClearIN(); - Endpoint_ClearStatusStage(); - } - - break; - } -} - -/** Task to manage the Mass Storage interface, reading in Command Block Wrappers from the host, processing the SCSI commands they - * contain, and returning Command Status Wrappers back to the host to indicate the success or failure of the last issued command. - */ -void MassStorage_Task(void) -{ - /* Device must be connected and configured for the task to run */ - if (USB_DeviceState != DEVICE_STATE_Configured) - return; - - /* Process sent command block from the host if one has been sent */ - if (ReadInCommandBlock()) - { - /* Indicate busy */ - LEDs_SetAllLEDs(LEDMASK_USB_BUSY); - - /* Check direction of command, select Data IN endpoint if data is from the device */ - if (CommandBlock.Flags & MS_COMMAND_DIR_DATA_IN) - Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPADDR); - - /* Decode the received SCSI command, set returned status code */ - CommandStatus.Status = SCSI_DecodeSCSICommand() ? MS_SCSI_COMMAND_Pass : MS_SCSI_COMMAND_Fail; - - /* Load in the CBW tag into the CSW to link them together */ - CommandStatus.Tag = CommandBlock.Tag; - - /* Load in the data residue counter into the CSW */ - CommandStatus.DataTransferResidue = CommandBlock.DataTransferLength; - - /* Stall the selected data pipe if command failed (if data is still to be transferred) */ - if ((CommandStatus.Status == MS_SCSI_COMMAND_Fail) && (CommandStatus.DataTransferResidue)) - Endpoint_StallTransaction(); - - /* Return command status block to the host */ - ReturnCommandStatus(); - - /* Indicate ready */ - LEDs_SetAllLEDs(LEDMASK_USB_READY); - } - - /* Check if a Mass Storage Reset occurred */ - if (IsMassStoreReset) - { - /* Reset the data endpoint banks */ - Endpoint_ResetEndpoint(MASS_STORAGE_OUT_EPADDR); - Endpoint_ResetEndpoint(MASS_STORAGE_IN_EPADDR); - - Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPADDR); - Endpoint_ClearStall(); - Endpoint_ResetDataToggle(); - Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPADDR); - Endpoint_ClearStall(); - Endpoint_ResetDataToggle(); - - /* Clear the abort transfer flag */ - IsMassStoreReset = false; - } -} - -/** Function to read in a command block from the host, via the bulk data OUT endpoint. This function reads in the next command block - * if one has been issued, and performs validation to ensure that the block command is valid. - * - * \return Boolean \c true if a valid command block has been read in from the endpoint, \c false otherwise - */ -static bool ReadInCommandBlock(void) -{ - uint16_t BytesTransferred; - - /* Select the Data Out endpoint */ - Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPADDR); - - /* Abort if no command has been sent from the host */ - if (!(Endpoint_IsOUTReceived())) - return false; - - /* Read in command block header */ - BytesTransferred = 0; - while (Endpoint_Read_Stream_LE(&CommandBlock, (sizeof(CommandBlock) - sizeof(CommandBlock.SCSICommandData)), - &BytesTransferred) == ENDPOINT_RWSTREAM_IncompleteTransfer) - { - /* Check if the current command is being aborted by the host */ - if (IsMassStoreReset) - return false; - } - - /* Verify the command block - abort if invalid */ - if ((CommandBlock.Signature != MS_CBW_SIGNATURE) || - (CommandBlock.LUN >= TOTAL_LUNS) || - (CommandBlock.Flags & 0x1F) || - (CommandBlock.SCSICommandLength == 0) || - (CommandBlock.SCSICommandLength > sizeof(CommandBlock.SCSICommandData))) - { - /* Stall both data pipes until reset by host */ - Endpoint_StallTransaction(); - Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPADDR); - Endpoint_StallTransaction(); - - return false; - } - - /* Read in command block command data */ - BytesTransferred = 0; - while (Endpoint_Read_Stream_LE(&CommandBlock.SCSICommandData, CommandBlock.SCSICommandLength, - &BytesTransferred) == ENDPOINT_RWSTREAM_IncompleteTransfer) - { - /* Check if the current command is being aborted by the host */ - if (IsMassStoreReset) - return false; - } - - /* Finalize the stream transfer to send the last packet */ - Endpoint_ClearOUT(); - - return true; -} - -/** Returns the filled Command Status Wrapper back to the host via the bulk data IN endpoint, waiting for the host to clear any - * stalled data endpoints as needed. - */ -static void ReturnCommandStatus(void) -{ - uint16_t BytesTransferred; - - /* Select the Data Out endpoint */ - Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPADDR); - - /* While data pipe is stalled, wait until the host issues a control request to clear the stall */ - while (Endpoint_IsStalled()) - { - /* Check if the current command is being aborted by the host */ - if (IsMassStoreReset) - return; - } - - /* Select the Data In endpoint */ - Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPADDR); - - /* While data pipe is stalled, wait until the host issues a control request to clear the stall */ - while (Endpoint_IsStalled()) - { - /* Check if the current command is being aborted by the host */ - if (IsMassStoreReset) - return; - } - - /* Write the CSW to the endpoint */ - BytesTransferred = 0; - while (Endpoint_Write_Stream_LE(&CommandStatus, sizeof(CommandStatus), - &BytesTransferred) == ENDPOINT_RWSTREAM_IncompleteTransfer) - { - /* Check if the current command is being aborted by the host */ - if (IsMassStoreReset) - return; - } - - /* Finalize the stream transfer to send the last packet */ - Endpoint_ClearIN(); -} - |