--- /dev/null
+/*
+ * Acess2 PCnet-FAST III Driver
+ * - By John Hodge (thePowersGang)
+ */
+#define DEBUG 0
+#define VERSION ((0<<8)|10)
+#include <acess.h>
+#include <modules.h>
+#include <fs_devfs.h>
+#include <drv_pci.h>
+#include <tpl_drv_network.h>
+#include <semaphore.h>
+
+// === CONSTANTS ===
+#define VENDOR_ID 0x1022
+#define DEVICE_ID 0x2000
+
+enum eRegs
+{
+ REG_APROM0 = 0x00,
+ REG_APROM4 = 0x04,
+ REG_APROM8 = 0x08,
+ REG_APROMC = 0x0C,
+ REG_RDP = 0x10, // 16 bit
+ REG_RAP = 0x14, // 8-bit
+ REG_RESET = 0x18, // 16-bit
+ REG_BDP = 0x1C, // 16-bit
+};
+
+enum eCSR_Regs
+{
+ CSR_STATUS, // CSR0 - Am79C973/Am79C975 Controller Status
+ CSR_IBA0, // CSR1 - Initialization Block Address[15:0]
+ CSR_IBA1, // CSR2 - Initialization Block Address[31:16]
+ CSR_INTMASK, // CSR3 - Interrupt Masks and Deferral Control
+
+ CSR_MAC0 = 12, // CSR12 - Physical Address[15:0]
+ CSR_MAC1 = 13, // CSR13 - Physical Address[31:16]
+ CSR_MAC2 = 14, // CSR14 - Physical Address[47:32]
+ CSR_MODE = 15, // CSR15 - Mode
+
+ CSR_RXBASE0 = 24, // CSR24 - Base Address of Receive Ring Lower
+ CSR_RXBASE1 = 25, // CSR25 - Base Address of Receive Ring Upper
+ CSR_TXBASE0 = 30, // CSR26 - Base Address of Transmit Ring Lower
+ CSR_TXBASE1 = 31, // CSR27 - Base Address of Transmit Ring Upper
+
+ CSR_RXLENGTH = 76, // CSR76 - Receive Ring Length
+ CSR_TXLENGTH = 78, // CSR78 - Transmit Ring Length
+};
+
+enum eBCR_Regs
+{
+ BCR_PHYCS = 32, // BCR32 - Internal PHY Control and Status
+ BCR_PHYADDR, // BCR33 - Internal PHY Address
+ BCR_PHYMGMT, // BCR34 - Internal PHY Management Data
+};
+
+// === TYPES ===
+typedef struct sCard
+{
+ Uint16 IOBase;
+ Uint8 IRQ;
+
+ int NumWaitingPackets;
+
+ char Name[2];
+ tVFS_Node Node;
+ Uint8 MacAddr[6];
+} tCard;
+
+// === PROTOTYPES ===
+ int PCnet3_Install(char **Options);
+char *PCnet3_ReadDir(tVFS_Node *Node, int Pos);
+tVFS_Node *PCnet3_FindDir(tVFS_Node *Node, const char *Filename);
+ int PCnet3_RootIOCtl(tVFS_Node *Node, int ID, void *Arg);
+Uint64 PCnet3_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
+Uint64 PCnet3_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
+ int PCnet3_IOCtl(tVFS_Node *Node, int ID, void *Arg);
+void PCnet3_IRQHandler(int Num);
+
+// === GLOBALS ===
+MODULE_DEFINE(0, VERSION, PCnet3, PCnet3_Install, NULL, NULL);
+tDevFS_Driver gPCnet3_DriverInfo = {
+ NULL, "PCnet3",
+ {
+ .NumACLs = 1,
+ .ACLs = &gVFS_ACL_EveryoneRX,
+ .Flags = VFS_FFLAG_DIRECTORY,
+ .ReadDir = PCnet3_ReadDir,
+ .FindDir = PCnet3_FindDir,
+ .IOCtl = PCnet3_RootIOCtl
+ }
+};
+ int giPCnet3_CardCount;
+tCard *gaPCnet3_Cards;
+
+// === CODE ===
+/**
+ * \brief Installs the PCnet3 Driver
+ */
+int PCnet3_Install(char **Options)
+{
+ int id = -1;
+ int i = 0;
+ Uint16 base;
+ tCard *card;
+
+ giPCnet3_CardCount = PCI_CountDevices(VENDOR_ID, DEVICE_ID);
+ Log_Debug("PCnet3", "%i cards", giPCnet3_CardCount);
+
+ if( giPCnet3_CardCount == 0 ) return MODULE_ERR_NOTNEEDED;
+
+ gaPCnet3_Cards = calloc( giPCnet3_CardCount, sizeof(tCard) );
+
+ while( (id = PCI_GetDevice(VENDOR_ID, DEVICE_ID, i)) != -1 )
+ {
+ card = &gaPCnet3_Cards[i];
+ base = PCI_GetBAR( id, 0 );
+ if( !(base & 1) ) {
+ Log_Warning("PCnet3", "Driver does not support MMIO, skipping card");
+ card->IOBase = 0;
+ card->IRQ = 0;
+ continue ;
+ }
+ base &= ~1;
+ card->IOBase = base;
+ card->IRQ = PCI_GetIRQ( id );
+
+ // Install IRQ Handler
+ IRQ_AddHandler(card->IRQ, PCnet3_IRQHandler);
+
+
+
+ Log_Log("PCnet3", "Card %i 0x%04x, IRQ %i %02x:%02x:%02x:%02x:%02x:%02x",
+ i, card->IOBase, card->IRQ,
+ card->MacAddr[0], card->MacAddr[1], card->MacAddr[2],
+ card->MacAddr[3], card->MacAddr[4], card->MacAddr[5]
+ );
+
+ i ++;
+ }
+
+ gPCnet3_DriverInfo.RootNode.Size = giPCnet3_CardCount;
+ DevFS_AddDevice( &gPCnet3_DriverInfo );
+
+ return MODULE_ERR_OK;
+}
+
+// --- Root Functions ---
+char *PCnet3_ReadDir(tVFS_Node *Node, int Pos)
+{
+ if( Pos < 0 || Pos >= giPCnet3_CardCount ) return NULL;
+
+ return strdup( gaPCnet3_Cards[Pos].Name );
+}
+
+tVFS_Node *PCnet3_FindDir(tVFS_Node *Node, const char *Filename)
+{
+ //TODO: It might be an idea to supprt >10 cards
+ if(Filename[0] == '\0' || Filename[1] != '\0') return NULL;
+ if(Filename[0] < '0' || Filename[0] > '9') return NULL;
+ return &gaPCnet3_Cards[ Filename[0]-'0' ].Node;
+}
+
+const char *csaPCnet3_RootIOCtls[] = {DRV_IOCTLNAMES, NULL};
+int PCnet3_RootIOCtl(tVFS_Node *Node, int ID, void *Data)
+{
+ ENTER("pNode iID pData", Node, ID, Data);
+ switch(ID)
+ {
+ BASE_IOCTLS(DRV_TYPE_NETWORK, "PCnet3", VERSION, csaPCnet3_RootIOCtls);
+ }
+ LEAVE('i', 0);
+ return 0;
+}
+
+// --- File Functions ---
+Uint64 PCnet3_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
+{
+ tCard *card = Node->ImplPtr;
+ Uint16 read_ofs, pkt_length;
+ int new_read_ofs;
+
+ ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
+
+retry:
+ if( Semaphore_Wait( &card->ReadSemaphore, 1 ) != 1 )
+ {
+ LEAVE_RET('i', 0);
+ }
+
+ Mutex_Acquire( &card->ReadMutex );
+
+ read_ofs = inw( card->IOBase + CAPR );
+ LOG("raw read_ofs = %i", read_ofs);
+ read_ofs = (read_ofs + 0x10) & 0xFFFF;
+ LOG("read_ofs = %i", read_ofs);
+
+ pkt_length = *(Uint16*)&card->ReceiveBuffer[read_ofs+2];
+
+ // Calculate new read offset
+ new_read_ofs = read_ofs + pkt_length + 4;
+ new_read_ofs = (new_read_ofs + 3) & ~3; // Align
+ if(new_read_ofs > card->ReceiveBufferLength) {
+ LOG("wrapping read_ofs");
+ new_read_ofs -= card->ReceiveBufferLength;
+ }
+ new_read_ofs -= 0x10; // I dunno
+ LOG("new_read_ofs = %i", new_read_ofs);
+
+ // Check for errors
+ if( *(Uint16*)&card->ReceiveBuffer[read_ofs] & 0x1E ) {
+ // Update CAPR
+ outw(card->IOBase + CAPR, new_read_ofs);
+ Mutex_Release( &card->ReadMutex );
+ goto retry; // I feel evil
+ }
+
+ // Get packet
+ if( Length > pkt_length ) Length = pkt_length;
+ memcpy(Buffer, &card->ReceiveBuffer[read_ofs+4], Length);
+
+ // Update CAPR
+ outw(card->IOBase + CAPR, new_read_ofs);
+
+ Mutex_Release( &card->ReadMutex );
+
+ LEAVE('i', Length);
+
+ return Length;
+}
+
+Uint64 PCnet3_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
+{
+ int td;
+ Uint32 status;
+ tCard *card = Node->ImplPtr;
+
+ if( Length > 1500 ) return 0; // MTU exceeded
+
+ ENTER("pNode XLength pBuffer", Node, Length, Buffer);
+
+ // TODO: Implement a semaphore for avaliable transmit buffers
+
+ // Find an avaliable descriptor
+ Mutex_Acquire(&card->CurTXProtector);
+ td = card->CurTXDescriptor;
+ card->CurTXDescriptor ++;
+ card->CurTXDescriptor %= 4;
+ Mutex_Release(&card->CurTXProtector);
+ // - Lock it
+ Mutex_Acquire( &card->TransmitInUse[td] );
+
+ LOG("td = %i", td);
+
+ // Transmit using descriptor `td`
+ LOG("card->PhysTransmitBuffers[td] = %P", card->PhysTransmitBuffers[td]);
+ outd(card->IOBase + TSAD0 + td*4, card->PhysTransmitBuffers[td]);
+ LOG("card->TransmitBuffers[td] = %p", card->TransmitBuffers[td]);
+ // Copy to buffer
+ memcpy(card->TransmitBuffers[td], Buffer, Length);
+ // Start
+ status = 0;
+ status |= Length & 0x1FFF; // 0-12: Length
+ status |= 0 << 13; // 13: OWN bit
+ status |= (0 & 0x3F) << 16; // 16-21: Early TX threshold (zero atm, TODO: check)
+ LOG("status = 0x%08x", status);
+ outd(card->IOBase + TSD0 + td*4, status);
+
+ LEAVE('i', (int)Length);
+
+ return Length;
+}
+
+const char *csaPCnet3_NodeIOCtls[] = {DRV_IOCTLNAMES, NULL};
+int PCnet3_IOCtl(tVFS_Node *Node, int ID, void *Data)
+{
+ tCard *card = Node->ImplPtr;
+ ENTER("pNode iID pData", Node, ID, Data);
+ switch(ID)
+ {
+ BASE_IOCTLS(DRV_TYPE_NETWORK, "PCnet3", VERSION, csaPCnet3_NodeIOCtls);
+ case NET_IOCTL_GETMAC:
+ if( !CheckMem(Data, 6) ) {
+ LEAVE('i', -1);
+ return -1;
+ }
+ memcpy( Data, card->MacAddr, 6 );
+ LEAVE('i', 1);
+ return 1;
+ }
+ LEAVE('i', 0);
+ return 0;
+}
+
+void PCnet3_IRQHandler(int Num)
+{
+ int i, j;
+ tCard *card;
+ Uint16 status;
+
+ LOG("Num = %i", Num);
+
+ for( i = 0; i < giPCnet3_CardCount; i ++ )
+ {
+ card = &gaPCnet3_Cards[i];
+ if( Num != card->IRQ ) break;
+
+ status = inw(card->IOBase + ISR);
+ LOG("status = 0x%02x", status);
+
+ // Transmit OK, a transmit descriptor is now free
+ if( status & FLAG_ISR_TOK )
+ {
+ for( j = 0; j < 4; j ++ )
+ {
+ if( ind(card->IOBase + TSD0 + j*4) & 0x8000 ) { // TSD TOK
+ Mutex_Release( &card->TransmitInUse[j] );
+ // TODO: Update semaphore once implemented
+ }
+ }
+ outw(card->IOBase + ISR, FLAG_ISR_TOK);
+ }
+
+ // Recieve OK, inform read
+ if( status & FLAG_ISR_ROK )
+ {
+ int read_ofs, end_ofs;
+ int packet_count = 0;
+ int len;
+
+ // Scan recieve buffer for packets
+ end_ofs = inw(card->IOBase + CBA);
+ read_ofs = card->SeenOfs;
+ LOG("read_ofs = %i, end_ofs = %i", read_ofs, end_ofs);
+ if( read_ofs > end_ofs )
+ {
+ while( read_ofs < card->ReceiveBufferLength )
+ {
+ packet_count ++;
+ len = *(Uint16*)&card->ReceiveBuffer[read_ofs+2];
+ LOG("%i 0x%x Pkt Hdr: 0x%04x, len: 0x%04x",
+ packet_count, read_ofs,
+ *(Uint16*)&card->ReceiveBuffer[read_ofs],
+ len
+ );
+ if(len > 2000) {
+ Log_Warning("PCnet3", "IRQ: Packet in buffer exceeds sanity (%i>2000)", len);
+ }
+ read_ofs += len + 4;
+ read_ofs = (read_ofs + 3) & ~3; // Align
+ }
+ read_ofs -= card->ReceiveBufferLength;
+ LOG("wrapped read_ofs");
+ }
+ while( read_ofs < end_ofs )
+ {
+ packet_count ++;
+ LOG("%i 0x%x Pkt Hdr: 0x%04x, len: 0x%04x",
+ packet_count, read_ofs,
+ *(Uint16*)&card->ReceiveBuffer[read_ofs],
+ *(Uint16*)&card->ReceiveBuffer[read_ofs+2]
+ );
+ read_ofs += *(Uint16*)&card->ReceiveBuffer[read_ofs+2] + 4;
+ read_ofs = (read_ofs + 3) & ~3; // Align
+ }
+ if( read_ofs != end_ofs ) {
+ Log_Warning("PCnet3", "IRQ: read_ofs (%i) != end_ofs(%i)", read_ofs, end_ofs);
+ read_ofs = end_ofs;
+ }
+ card->SeenOfs = read_ofs;
+
+ LOG("packet_count = %i, read_ofs = 0x%x", packet_count, read_ofs);
+
+ if( packet_count )
+ {
+ if( Semaphore_Signal( &card->ReadSemaphore, packet_count ) != packet_count ) {
+ // Oops?
+ }
+ VFS_MarkAvaliable( &card->Node, 1 );
+ }
+
+ outw(card->IOBase + ISR, FLAG_ISR_ROK);
+ }
+ }
+}
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