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/*
* upstream_msc.c
*
* Created on: 4/07/2015
* Author: Robert Fisk
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
#include "upstream_interface_def.h"
#include "upstream_msc.h"
#include "upstream_spi.h"
#include "upstream_statemachine.h"
#include "stm32f4xx_hal.h"
#include "build_config.h"
#ifdef CONFIG_MASS_STORAGE_ENABLED
//Stuff we need to save for our callbacks to use:
UpstreamMSCCallbackTypeDef TestReadyCallback;
UpstreamMSCCallbackTypeDef BeginReadCallback;
UpstreamMSCCallbackTypeDef BeginWriteCallback;
UpstreamMSCCallbackTypeDef DisconnectCallback;
UpstreamMSCCallbackUintPacketTypeDef GetCapacityCallback;
UpstreamMSCCallbackPacketTypeDef GetStreamDataCallback;
uint64_t BlockStart;
uint32_t BlockCount;
uint32_t ByteCount;
UpstreamPacketTypeDef* ReadStreamPacket;
uint8_t ReadStreamBusy;
static void Upstream_MSC_TestReadyFreePacketCallback(UpstreamPacketTypeDef* freePacket);
static void Upstream_MSC_TestReadyReplyCallback(UpstreamPacketTypeDef* replyPacket);
static void Upstream_MSC_GetCapacityFreePacketCallback(UpstreamPacketTypeDef* freePacket);
static void Upstream_MSC_GetCapacityReplyCallback(UpstreamPacketTypeDef* replyPacket);
static void Upstream_MSC_GetStreamDataPacketCallback(UpstreamPacketTypeDef* replyPacket);
static void Upstream_MSC_BeginReadFreePacketCallback(UpstreamPacketTypeDef* freePacket);
static void Upstream_MSC_BeginWriteFreePacketCallback(UpstreamPacketTypeDef* freePacket);
static void Upstream_MSC_RequestDisconnectFreePacketCallback(UpstreamPacketTypeDef* freePacket);
static void Upstream_MSC_RequestDisconnectReplyCallback(UpstreamPacketTypeDef* replyPacket);
HAL_StatusTypeDef Upstream_MSC_TestReady(UpstreamMSCCallbackTypeDef callback)
{
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
//UPSTREAM_STATEMACHINE_FREAKOUT;
return HAL_ERROR;
}
TestReadyCallback = callback;
return Upstream_GetFreePacket(Upstream_MSC_TestReadyFreePacketCallback);
}
static void Upstream_MSC_TestReadyFreePacketCallback(UpstreamPacketTypeDef* freePacket)
{
freePacket->Length16 = UPSTREAM_PACKET_HEADER_LEN_16;
freePacket->CommandClass = COMMAND_CLASS_MASS_STORAGE;
freePacket->Command = COMMAND_MSC_TEST_UNIT_READY;
if (Upstream_TransmitPacket(freePacket) == HAL_OK)
{
//Upstream_PacketManager will free the packet when the transfer is done
if (Upstream_ReceivePacket(Upstream_MSC_TestReadyReplyCallback) != HAL_OK)
{
TestReadyCallback(HAL_ERROR);
}
return;
}
//else:
Upstream_ReleasePacket(freePacket);
TestReadyCallback(HAL_ERROR);
}
static void Upstream_MSC_TestReadyReplyCallback(UpstreamPacketTypeDef* replyPacket)
{
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
return;
}
if (replyPacket == NULL)
{
TestReadyCallback(HAL_ERROR);
return;
}
if ((replyPacket->Length16 != (UPSTREAM_PACKET_HEADER_LEN_16 + 1)) ||
(replyPacket->Data[0] != HAL_OK))
{
Upstream_ReleasePacket(replyPacket);
TestReadyCallback(HAL_ERROR);
return;
}
Upstream_ReleasePacket(replyPacket);
TestReadyCallback(HAL_OK);
}
HAL_StatusTypeDef Upstream_MSC_GetCapacity(UpstreamMSCCallbackUintPacketTypeDef callback)
{
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
return HAL_ERROR;
}
GetCapacityCallback = callback;
return Upstream_GetFreePacket(Upstream_MSC_GetCapacityFreePacketCallback);
}
static void Upstream_MSC_GetCapacityFreePacketCallback(UpstreamPacketTypeDef* freePacket)
{
freePacket->Length16 = UPSTREAM_PACKET_HEADER_LEN_16;
freePacket->CommandClass = COMMAND_CLASS_MASS_STORAGE;
freePacket->Command = COMMAND_MSC_GET_CAPACITY;
if (Upstream_TransmitPacket(freePacket) == HAL_OK)
{
if (Upstream_ReceivePacket(Upstream_MSC_GetCapacityReplyCallback) != HAL_OK)
{
GetCapacityCallback(NULL, 0, 0);
}
return;
}
//else:
Upstream_ReleasePacket(freePacket);
GetCapacityCallback(NULL, 0, 0);
}
static void Upstream_MSC_GetCapacityReplyCallback(UpstreamPacketTypeDef* replyPacket)
{
uint32_t block_count;
uint32_t block_size;
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
return;
}
if (replyPacket == NULL)
{
GetCapacityCallback(NULL, 0, 0);
return;
}
if (replyPacket->Length16 != (UPSTREAM_PACKET_HEADER_LEN_16 + (8 / 2)))
{
Upstream_ReleasePacket(replyPacket);
GetCapacityCallback(NULL, 0, 0);
return;
}
block_count = *(uint32_t*)&(replyPacket->Data[0]);
block_size = *(uint32_t*)&(replyPacket->Data[4]);
if ((block_count < MSC_MINIMUM_BLOCK_COUNT) ||
(block_size != MSC_SUPPORTED_BLOCK_SIZE))
{
Upstream_ReleasePacket(replyPacket);
GetCapacityCallback(NULL, 0, 0);
return;
}
GetCapacityCallback(replyPacket, block_count, block_size); //usb_msc_scsi will use this packet, so don't release now
}
HAL_StatusTypeDef Upstream_MSC_BeginRead(UpstreamMSCCallbackTypeDef callback,
uint64_t readBlockStart,
uint32_t readBlockCount,
uint32_t readByteCount)
{
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
return HAL_ERROR;
}
BlockStart = readBlockStart;
BlockCount = readBlockCount;
ByteCount = readByteCount;
ReadStreamPacket = NULL; //Prepare for GetStreamDataPacket's use
ReadStreamBusy = 0;
BeginReadCallback = callback;
return Upstream_GetFreePacket(Upstream_MSC_BeginReadFreePacketCallback);
}
static void Upstream_MSC_BeginReadFreePacketCallback(UpstreamPacketTypeDef* freePacket)
{
freePacket->Length16 = UPSTREAM_PACKET_HEADER_LEN_16 + ((4 * 3) / 2);
freePacket->CommandClass = COMMAND_CLASS_MASS_STORAGE;
freePacket->Command = COMMAND_MSC_READ;
*(uint64_t*)&(freePacket->Data[0]) = BlockStart;
*(uint32_t*)&(freePacket->Data[8]) = BlockCount;
if (Upstream_TransmitPacket(freePacket) == HAL_OK)
{
BeginReadCallback(HAL_OK);
return;
}
//else:
Upstream_ReleasePacket(freePacket);
BeginReadCallback(HAL_ERROR);
}
HAL_StatusTypeDef Upstream_MSC_GetStreamDataPacket(UpstreamMSCCallbackPacketTypeDef callback)
{
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
return HAL_ERROR;
}
GetStreamDataCallback = callback;
if (ReadStreamBusy != 0)
{
return HAL_OK;
}
ReadStreamBusy = 1;
if (ReadStreamPacket && GetStreamDataCallback) //Do we have a stored packet and an address to send it?
{
Upstream_MSC_GetStreamDataPacketCallback(ReadStreamPacket); //Send it now!
ReadStreamPacket = NULL;
return HAL_OK; //Our callback will call us again, so we don't need to get a packet in this case.
}
return Upstream_ReceivePacket(Upstream_MSC_GetStreamDataPacketCallback);
}
static void Upstream_MSC_GetStreamDataPacketCallback(UpstreamPacketTypeDef* replyPacket)
{
uint32_t dataLength8;
ReadStreamBusy = 0;
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
return;
}
if (GetStreamDataCallback == NULL)
{
ReadStreamPacket = replyPacket; //We used up our callback already, so save this one for later.
return;
}
if (replyPacket == NULL)
{
GetStreamDataCallback(NULL, 0);
return;
}
dataLength8 = (replyPacket->Length16 - UPSTREAM_PACKET_HEADER_LEN_16) * 2;
if (((replyPacket->CommandClass & COMMAND_CLASS_DATA_FLAG) == 0) || //Any 'command' reply (as opposed to 'data' reply) is an automatic fail here
(dataLength8 != MSC_MINIMUM_DATA_UNIT) || //Should only receive integer units of MSC block size
(dataLength8 > ByteCount)) //No more data than expected transfer length
{
GetStreamDataCallback(NULL, 0);
return;
}
ByteCount -= dataLength8;
GetStreamDataCallback(replyPacket, dataLength8); //usb_msc_scsi will use this packet, so don't release now
if (ByteCount > 0)
{
Upstream_MSC_GetStreamDataPacket(NULL); //Try to get the next packet now, before USB asks for it
}
}
#ifdef CONFIG_MASS_STORAGE_WRITES_PERMITTED
HAL_StatusTypeDef Upstream_MSC_BeginWrite(UpstreamMSCCallbackTypeDef callback,
uint64_t writeBlockStart,
uint32_t writeBlockCount)
{
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
return HAL_ERROR;
}
LED_SetState(LED_STATUS_FLASH_READWRITE);
BlockStart = writeBlockStart;
BlockCount = writeBlockCount;
BeginWriteCallback = callback;
return Upstream_GetFreePacket(Upstream_MSC_BeginWriteFreePacketCallback);
}
static void Upstream_MSC_BeginWriteFreePacketCallback(UpstreamPacketTypeDef* freePacket)
{
freePacket->Length16 = UPSTREAM_PACKET_HEADER_LEN_16 + ((4 * 3) / 2);
freePacket->CommandClass = COMMAND_CLASS_MASS_STORAGE;
freePacket->Command = COMMAND_MSC_WRITE;
*(uint64_t*)&(freePacket->Data[0]) = BlockStart;
*(uint32_t*)&(freePacket->Data[8]) = BlockCount;
if (Upstream_TransmitPacket(freePacket) == HAL_OK)
{
BeginWriteCallback(HAL_OK);
return;
}
//else:
Upstream_ReleasePacket(freePacket);
BeginWriteCallback(HAL_ERROR);
}
HAL_StatusTypeDef Upstream_MSC_PutStreamDataPacket(UpstreamPacketTypeDef* packetToSend,
uint32_t dataLength8)
{
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE)
{
return HAL_ERROR;
}
if ((dataLength8 % 2) != 0)
{
return HAL_ERROR;
}
packetToSend->Length16 = (dataLength8 / 2) + UPSTREAM_PACKET_HEADER_LEN_16;
packetToSend->CommandClass = COMMAND_CLASS_MASS_STORAGE | COMMAND_CLASS_DATA_FLAG;
packetToSend->Command = COMMAND_MSC_WRITE;
return Upstream_TransmitPacket(packetToSend);
}
#endif //#ifdef CONFIG_MASS_STORAGE_WRITES_PERMITTED
HAL_StatusTypeDef Upstream_MSC_RequestDisconnect(UpstreamMSCCallbackTypeDef callback)
{
if (Upstream_StateMachine_CheckActiveClass() != COMMAND_CLASS_MASS_STORAGE) return HAL_ERROR;
DisconnectCallback = callback;
return Upstream_GetFreePacket(Upstream_MSC_RequestDisconnectFreePacketCallback);
}
static void Upstream_MSC_RequestDisconnectFreePacketCallback(UpstreamPacketTypeDef* freePacket)
{
freePacket->Length16 = UPSTREAM_PACKET_HEADER_LEN_16;
freePacket->CommandClass = COMMAND_CLASS_MASS_STORAGE;
freePacket->Command = COMMAND_MSC_DISCONNECT;
if (Upstream_TransmitPacket(freePacket) == HAL_OK)
{
//Upstream_PacketManager will free the packet when the transfer is done
if (Upstream_ReceivePacket(Upstream_MSC_RequestDisconnectReplyCallback) != HAL_OK)
{
DisconnectCallback(HAL_ERROR);
}
return;
}
//else:
Upstream_ReleasePacket(freePacket);
DisconnectCallback(HAL_ERROR);
}
static void Upstream_MSC_RequestDisconnectReplyCallback(UpstreamPacketTypeDef* replyPacket)
{
//Acknowledge the SCSI Stop command to host now.
//We will disconnect from host when Downstream replies with COMMAND_ERROR_DEVICE_DISCONNECTED.
Upstream_ReleasePacket(replyPacket);
DisconnectCallback(HAL_OK);
}
#endif //#ifdef CONFIG_MASS_STORAGE_ENABLED