diff options
Diffstat (limited to 'LUFA/Drivers/USB/Class/Host/CDC.c')
| -rw-r--r-- | LUFA/Drivers/USB/Class/Host/CDC.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/LUFA/Drivers/USB/Class/Host/CDC.c b/LUFA/Drivers/USB/Class/Host/CDC.c new file mode 100644 index 000000000..30970f119 --- /dev/null +++ b/LUFA/Drivers/USB/Class/Host/CDC.c @@ -0,0 +1,231 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2009.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, and distribute this software
+ and its documentation for any purpose and without fee is hereby
+ granted, 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 disclaim 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.
+*/
+
+#include "../../HighLevel/USBMode.h"
+#if defined(USB_CAN_BE_HOST)
+
+#define INCLUDE_FROM_CDC_CLASS_HOST_C
+#include "CDC.h"
+
+static uint8_t CDC_Host_ProcessConfigDescriptor(void)
+{
+ uint8_t* ConfigDescriptorData;
+ uint16_t ConfigDescriptorSize;
+ uint8_t FoundEndpoints = 0;
+
+ if (USB_GetDeviceConfigDescriptor(&ConfigDescriptorSize, NULL) != HOST_SENDCONTROL_Successful)
+ return ControlError;
+
+ if (ConfigDescriptorSize > MAX_CONFIG_DESCRIPTOR_SIZE)
+ return DescriptorTooLarge;
+
+ ConfigDescriptorData = alloca(ConfigDescriptorSize);
+
+ USB_GetDeviceConfigDescriptor(&ConfigDescriptorSize, ConfigDescriptorData);
+
+ if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
+ return InvalidConfigDataReturned;
+
+ if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+ DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ return NoCDCInterfaceFound;
+ }
+
+ while (FoundEndpoints != ((1 << CDC_NOTIFICATIONPIPE) | (1 << CDC_DATAPIPE_IN) | (1 << CDC_DATAPIPE_OUT)))
+ {
+ if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+ DComp_CDC_Host_NextInterfaceCDCDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ /* Check to see if the control interface's notification pipe has been found, if so search for the data interface */
+ if (FoundEndpoints & (1 << CDC_NOTIFICATIONPIPE))
+ {
+ /* Get the next CDC data interface from the configuration descriptor (CDC class has two CDC interfaces) */
+ if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+ DComp_CDC_Host_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ /* Descriptor not found, error out */
+ return NoCDCInterfaceFound;
+ }
+ }
+ else
+ {
+ FoundEndpoints = 0;
+
+ Pipe_SelectPipe(CDC_NOTIFICATIONPIPE);
+ Pipe_DisablePipe();
+ Pipe_SelectPipe(CDC_DATAPIPE_IN);
+ Pipe_DisablePipe();
+ Pipe_SelectPipe(CDC_DATAPIPE_OUT);
+ Pipe_DisablePipe();
+
+ if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+ DComp_CDC_Host_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ return NoCDCInterfaceFound;
+ }
+ }
+
+ if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
+ DComp_CDC_Host_NextInterfaceCDCDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
+ {
+ return NoEndpointFound;
+ }
+ }
+
+ USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
+
+ if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
+ {
+ if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
+ {
+ Pipe_ConfigurePipe(CDC_NOTIFICATIONPIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+ EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
+
+ Pipe_SetInfiniteINRequests();
+ Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS);
+
+ FoundEndpoints |= (1 << CDC_NOTIFICATIONPIPE);
+ }
+ }
+ else
+ {
+ if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
+ {
+ Pipe_ConfigurePipe(CDC_DATAPIPE_IN, EP_TYPE_BULK, PIPE_TOKEN_IN,
+ EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
+
+ Pipe_SetInfiniteINRequests();
+ Pipe_Unfreeze();
+
+ FoundEndpoints |= (1 << CDC_DATAPIPE_IN);
+ }
+ else
+ {
+ Pipe_ConfigurePipe(CDC_DATAPIPE_OUT, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+ EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
+
+ Pipe_Unfreeze();
+
+ FoundEndpoints |= (1 << CDC_DATAPIPE_OUT);
+ }
+ }
+ }
+
+ return SuccessfulConfigRead;
+}
+
+static uint8_t DComp_CDC_Host_NextCDCControlInterface(void* CurrentDescriptor)
+{
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
+ /* Check the CDC descriptor class, subclass and protocol, break out if correct control interface found */
+ if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == CDC_CONTROL_CLASS) &&
+ (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == CDC_CONTROL_SUBCLASS) &&
+ (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == CDC_CONTROL_PROTOCOL))
+ {
+ return DESCRIPTOR_SEARCH_Found;
+ }
+ }
+
+ return DESCRIPTOR_SEARCH_NotFound;
+}
+
+static uint8_t DComp_CDC_Host_NextCDCDataInterface(void* CurrentDescriptor)
+{
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
+ /* Check the CDC descriptor class, subclass and protocol, break out if correct data interface found */
+ if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == CDC_DATA_CLASS) &&
+ (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == CDC_DATA_SUBCLASS) &&
+ (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == CDC_DATA_PROTOCOL))
+ {
+ return DESCRIPTOR_SEARCH_Found;
+ }
+ }
+
+ return DESCRIPTOR_SEARCH_NotFound;
+}
+
+static uint8_t DComp_CDC_Host_NextInterfaceCDCDataEndpoint(void* CurrentDescriptor)
+{
+ if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
+ {
+ uint8_t EndpointType = (DESCRIPTOR_CAST(CurrentDescriptor,
+ USB_Descriptor_Endpoint_t).Attributes & EP_TYPE_MASK);
+
+ if ((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT))
+ return DESCRIPTOR_SEARCH_Found;
+ }
+ else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
+ {
+ return DESCRIPTOR_SEARCH_Fail;
+ }
+
+ return DESCRIPTOR_SEARCH_NotFound;
+}
+
+void CDC_Host_Task(void)
+{
+ uint8_t ErrorCode;
+
+ switch (USB_HostState)
+ {
+ case HOST_STATE_Addressed:
+ USB_ControlRequest = (USB_Request_Header_t)
+ {
+ .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
+ .bRequest = REQ_SetConfiguration,
+ .wValue = 1,
+ .wIndex = 0,
+ .wLength = 0,
+ };
+
+ Pipe_SelectPipe(PIPE_CONTROLPIPE);
+
+ if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
+ {
+ USB_HostState = HOST_STATE_Unattached;
+ }
+
+ USB_HostState = HOST_STATE_Configured;
+ break;
+ case HOST_STATE_Configured:
+ if ((ErrorCode = CDC_Host_ProcessConfigDescriptor()) != SuccessfulConfigRead)
+ {
+ USB_HostState = HOST_STATE_Unattached;
+ }
+
+ USB_HostState = HOST_STATE_Ready;
+ break;
+ }
+}
+
+#endif
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