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#ifndef ION_DEVICE_USB_DFU_INTERFACE_H
#define ION_DEVICE_USB_DFU_INTERFACE_H
#include <assert.h>
#include <stddef.h>
#include "stack/device.h"
#include "stack/interface.h"
#include "stack/endpoint0.h"
#include "stack/setup_packet.h"
#include "stack/streamable.h"
namespace Ion {
namespace USB {
namespace Device {
class DFUInterface : public Interface {
public:
DFUInterface(Device * device, Endpoint0 * ep0, uint8_t bInterfaceAlternateSetting) :
Interface(ep0),
m_device(device),
m_status(Status::OK),
m_state(State::dfuIDLE),
m_addressPointer(0),
m_potentialNewAddressPointer(0),
m_erasePage(-1),
m_largeBuffer{0},
m_largeBufferLength(0),
m_writeAddress(0),
m_bInterfaceAlternateSetting(bInterfaceAlternateSetting)
{
}
void wholeDataReceivedCallback(SetupPacket * request, uint8_t * transferBuffer, uint16_t * transferBufferLength) override;
void wholeDataSentCallback(SetupPacket * request, uint8_t * transferBuffer, uint16_t * transferBufferLength) override;
protected:
void setActiveInterfaceAlternative(uint8_t interfaceAlternativeIndex) override {
assert(interfaceAlternativeIndex == m_bInterfaceAlternateSetting);
}
uint8_t getActiveInterfaceAlternative() override {
return m_bInterfaceAlternateSetting;
}
bool processSetupInRequest(SetupPacket * request, uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t transferBufferMaxLength) override;
private:
// DFU Request Codes
enum class DFURequest {
Detach = 0,
Download = 1,
Upload = 2,
GetStatus = 3,
ClearStatus = 4,
GetState = 5,
Abort = 6
};
// DFU Download Commmand Codes
enum class DFUDownloadCommand {
GetCommand = 0x00,
SetAddressPointer = 0x21,
Erase = 0x41,
ReadUnprotect = 0x92
};
enum class Status : uint8_t {
OK = 0x00,
errTARGET = 0x01,
errFILE = 0x02,
errWRITE = 0x03,
errERASE = 0x04,
errCHECK_ERASED = 0x05,
errPROG = 0x06,
errVERIFY = 0x07,
errADDRESS = 0x08,
errNOTDONE = 0x09,
errFIRMWARE = 0x0A,
errVENDOR = 0x0B,
errUSBR = 0x0C,
errPOR = 0x0D,
errUNKNOWN = 0x0E,
errSTALLEDPKT = 0x0F
};
enum class State : uint8_t {
appIDLE = 0,
appDETACH = 1,
dfuIDLE = 2,
dfuDNLOADSYNC = 3,
dfuDNBUSY = 4,
dfuDNLOADIDLE = 5,
dfuMANIFESTSYNC = 6,
dfuMANIFEST = 7,
dfuMANIFESTWAITRESET = 8,
dfuUPLOADIDLE = 9,
dfuERROR = 10
};
class StatusData : public Streamable {
public:
StatusData(Status status, State state, uint32_t pollTimeout = 1) :
/* We put a default pollTimeout value of 1ms: if the device is busy, the
* host has to wait 1ms before sending a getStatus Request. */
m_bStatus((uint8_t)status),
m_bwPollTimeout{uint8_t((pollTimeout>>16) & 0xFF), uint8_t((pollTimeout>>8) & 0xFF), uint8_t(pollTimeout & 0xFF)},
m_bState((uint8_t)state),
m_iString(0)
{
}
protected:
void push(Channel * c) const override;
private:
uint8_t m_bStatus; // Status resulting from the execution of the most recent request
uint8_t m_bwPollTimeout[3]; // m_bwPollTimeout is 24 bits
uint8_t m_bState; // State of the device immediately following transmission of this response
uint8_t m_iString;
};
class StateData : public Streamable {
public:
StateData(State state) : m_bState((uint8_t)state) {}
protected:
void push(Channel * c) const override;
private:
uint8_t m_bState; // Current state of the device
};
/* The Flash and SRAM addresses are in flash.ld. However, dfu_interface is
* linked with dfu.ld, so we cannot access the values. */
constexpr static uint32_t k_flashStartAddress = 0x08000000;
constexpr static uint32_t k_flashEndAddress = 0x08100000;
constexpr static uint32_t k_sramStartAddress = 0x20000000;
constexpr static uint32_t k_sramEndAddress = 0x20040000;
// Download and upload
bool processDownloadRequest(uint16_t wLength, uint16_t * transferBufferLength);
bool processUploadRequest(SetupPacket * request, uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t transferBufferMaxLength);
// Address pointer
void setAddressPointerCommand(SetupPacket * request, uint8_t * transferBuffer, uint16_t transferBufferLength);
void changeAddressPointerIfNeeded();
// Access memory
void eraseCommand(uint8_t * transferBuffer, uint16_t transferBufferLength);
void eraseMemoryIfNeeded();
void writeOnMemory();
void unlockFlashMemory();
void lockFlashMemoryAndPurgeCaches();
// Status
bool getStatus(SetupPacket * request, uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t transferBufferMaxLength);
bool clearStatus(SetupPacket * request, uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t transferBufferMaxLength);
// State
bool getState(uint8_t * transferBuffer, uint16_t * transferBufferLength, uint16_t maxSize);
// Abort
bool dfuAbort(uint16_t * transferBufferLength);
// Leave DFU
void leaveDFUAndReset();
Device * m_device;
Status m_status;
State m_state;
uint32_t m_addressPointer;
uint32_t m_potentialNewAddressPointer;
int32_t m_erasePage;
uint8_t m_largeBuffer[Endpoint0::MaxTransferSize];
uint16_t m_largeBufferLength;
uint32_t m_writeAddress;
uint8_t m_bInterfaceAlternateSetting;
};
}
}
}
#endif
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