Add more const-ness to the stream endpoint/pipe functions where possible.

[pub/USBasp.git] / Bootloaders / DFU / Descriptors.c

diff --git a/Bootloaders/DFU/Descriptors.c b/Bootloaders/DFU/Descriptors.c
index 25df7fc..55449c6 100644 (file)
--- a/Bootloaders/DFU/Descriptors.c
+++ b/Bootloaders/DFU/Descriptors.c
@@ -1,13 +1,13 @@
 /*
              LUFA Library
-     Copyright (C) Dean Camera, 2010.
+     Copyright (C) Dean Camera, 2011.
 
   dean [at] fourwalledcubicle [dot] com
-      www.fourwalledcubicle.com
+           www.lufa-lib.org
 */
 
 /*
-  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2011  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
@@ -37,12 +37,12 @@
 
 #include "Descriptors.h"
 
-/** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
+/** Device descriptor structure. This descriptor, located in SRAM memory, describes the overall
  *  device characteristics, including the supported USB version, control endpoint size and the
  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  *  process begins.
  */
-USB_Descriptor_Device_t DeviceDescriptor =
+const USB_Descriptor_Device_t DeviceDescriptor =
 {
        .Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
 
@@ -64,26 +64,26 @@ USB_Descriptor_Device_t DeviceDescriptor =
        .NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
 };
 
-/** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
+/** Configuration descriptor structure. This descriptor, located in SRAM memory, describes the usage
  *  of the device in one of its supported configurations, including information about any device interfaces
  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  *  a configuration so that the host may correctly communicate with the USB device.
  */
-USB_Descriptor_Configuration_t ConfigurationDescriptor =
+const USB_Descriptor_Configuration_t ConfigurationDescriptor =
 {
        .Config =
                {
-                       .Header                   = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
+                       .Header                 = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
 
-                       .TotalConfigurationSize   = sizeof(USB_Descriptor_Configuration_t),
-                       .TotalInterfaces          = 1,
+                       .TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
+                       .TotalInterfaces        = 1,
 
-                       .ConfigurationNumber      = 1,
-                       .ConfigurationStrIndex    = NO_DESCRIPTOR,
+                       .ConfigurationNumber    = 1,
+                       .ConfigurationStrIndex  = NO_DESCRIPTOR,
 
-                       .ConfigAttributes         = USB_CONFIG_ATTR_BUSPOWERED,
+                       .ConfigAttributes       = USB_CONFIG_ATTR_BUSPOWERED,
 
-                       .MaxPowerConsumption      = USB_CONFIG_POWER_MA(100)
+                       .MaxPowerConsumption    = USB_CONFIG_POWER_MA(100)
                },
 
        .DFU_Interface =
@@ -109,17 +109,17 @@ USB_Descriptor_Configuration_t ConfigurationDescriptor =
                        .Attributes             = (ATTR_CAN_UPLOAD | ATTR_CAN_DOWNLOAD),
 
                        .DetachTimeout          = 0x0000,
-                       .TransferSize           = 0x0c00,
+                       .TransferSize           = 0x0C00,
 
                        .DFUSpecification       = VERSION_BCD(01.01)
                }
 };
 
-/** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
+/** Language descriptor structure. This descriptor, located in SRAM memory, is returned when the host requests
  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
  */
-USB_Descriptor_String_t LanguageString =
+const USB_Descriptor_String_t LanguageString =
 {
        .Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 
@@ -130,7 +130,7 @@ USB_Descriptor_String_t LanguageString =
  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
  *  Descriptor.
  */
-USB_Descriptor_String_t ProductString =
+const USB_Descriptor_String_t ProductString =
 {
        .Header                 = {.Size = USB_STRING_LEN(18), .Type = DTYPE_String},
 
@@ -147,38 +147,29 @@ uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
                                     const uint8_t wIndex,
                                     const void** const DescriptorAddress)
 {
-       const uint8_t  DescriptorType   = (wValue >> 8);
-       const uint8_t  DescriptorNumber = (wValue & 0xFF);
+       const uint8_t DescriptorType   = (wValue >> 8);
+       const uint8_t DescriptorNumber = (wValue & 0xFF);
 
        const void* Address = NULL;
-       uint16_t    Size    = NO_DESCRIPTOR;
 
        switch (DescriptorType)
        {
                case DTYPE_Device:
                        Address = &DeviceDescriptor;
-                       Size    = sizeof(USB_Descriptor_Device_t);
                        break;
                case DTYPE_Configuration:
                        Address = &ConfigurationDescriptor;
-                       Size    = sizeof(USB_Descriptor_Configuration_t);
                        break;
                case DTYPE_String:
                        if (!(DescriptorNumber))
-                       {
-                               Address = &LanguageString;
-                               Size    = LanguageString.Header.Size;
-                       }
+                         Address = &LanguageString;
                        else
-                       {
-                               Address = &ProductString;
-                               Size    = ProductString.Header.Size;
-                       }
+                         Address = &ProductString;
 
                        break;
        }
 
        *DescriptorAddress = Address;
-       return Size;
+       return (Address != NULL) ? ((USB_Descriptor_Header_t*)Address)->Size : NO_DESCRIPTOR;
 }