#define RX_START_BUFF 0x4c
#define RX_END_BUFF 0x80
-uint_t next = (RX_START_BUFF << 8);
+static uint_t next = (RX_START_BUFF << 8);
static uint_t received = 0;
static uint_t send_done = 1;
+struct NE2K_REGS* regs;
+
struct callback {
int (*packet_received)(struct NE2K_Packet_Info *info, uchar_t *packet);
} callbacks;
+#if DEBUG
static void Dump_Registers()
{
uint_t data;
PrintBoth("\t%x: %x\n", NE2K_BASE_ADDR + i, data);
}
}
-
+#endif
+#if 0
static int NE2K_Transmit(struct NE2K_REGS *regs)
{
while(!send_done);
return 0;
}
-
+#endif
static void NE2K_Interrupt_Handler(struct Interrupt_State * state)
{
Begin_IRQ(state);
if(isr_content & 0x01) /* A packet has been received. */
{
uchar_t current;
- /*do{
- Out_Byte(NE2K_CR, 0x4a);
- current = In_Byte(NE2K_CURR);
- Out_Byte(NE2K_CR, 0x0a);
- NE2K_Receive();
- Out_Byte(NE2K_ISR, 0x01);*/
- /* If BNRY and CURR aren't equal, more than one packet has been received. */
- //}while (current > In_Byte(NE2K_BNRY));
- Out_Byte(NE2K_CR, 0x4a);
+ Out_Byte(NE2K_CR, 0x4a); /* Page 1 */
current = In_Byte(NE2K_CURR);
- Out_Byte(NE2K_CR, 0x0a);
+ Out_Byte(NE2K_CR, 0x0a); /* Page 0 */
NE2K_Receive();
+
+ /* When CURR equals BNRY, all packets in the receive ring buffer have been read, and
+ the packet received bit in the interrupt status register can be cleared. */
if(current == In_Byte(NE2K_BNRY))
- /* When CURR equals BNRY, all packets in the receive ring buffer have been read. */
- Out_Byte(NE2K_ISR, 0x01); /* Clear the packet received bit of the Interrupt Register. */
+ Out_Byte(NE2K_ISR, 0x01);
}
End_IRQ(state);
callbacks.packet_received = rcvd_fn;
PrintBoth("Initializing network card...\n");
- Out_Byte(NE2K_CR+0x1f, In_Byte(NE2K_CR+0x1f)); /* Reset? */
+ Out_Byte(NE2K_CR+0x1f, In_Byte(NE2K_CR+0x1f)); /* Reset */
- struct NE2K_REGS* regs = Malloc(sizeof(struct NE2K_REGS));
+ regs = Malloc(sizeof(struct NE2K_REGS));
struct _CR * cr = (struct _CR *)&(regs->cr);
struct _RCR * rcr = (struct _RCR*)&(regs->rcr);
struct _IMR * imr = (struct _IMR *)&(regs->imr);
cr->sta = 0x1; // toggle start bit
cr->stp = 0x0;
Out_Byte(NE2K_CR, regs->cr);
-
+
+#if DEBUG
Dump_Registers();
- cr->ps = NE2K_PAGE1;
+ cr->ps = 0x01;
Out_Byte(NE2K_CR, regs->cr);
Dump_Registers();
- cr->ps = NE2K_PAGE2;
+ cr->ps = 0x02;
Out_Byte(NE2K_CR, regs->cr);
Dump_Registers();
- cr->ps = NE2K_PAGE0;
+ cr->ps = 0x00;
Out_Byte(NE2K_CR, regs->cr);
+#endif
Install_IRQ(NE2K_IRQ, NE2K_Interrupt_Handler);
Enable_IRQ(NE2K_IRQ);
-
+#if 0
for(i = 0; i < 0; i++)
{
NE2K_Transmit(regs);
PrintBoth("Transmitting a packet\n");
}
-
+#endif
+/*
uchar_t src_addr[6] = { 0x52, 0x54, 0x00, 0x12, 0x34, 0x58 };
uchar_t dest_addr[6] = { 0x52, 0x54, 0x00, 0x12, 0x34, 0x56 };
for(i = 0; i < 0; i++) {
NE2K_Send(regs, src_addr, dest_addr, 0x01, data, size);
}
-
+*/
//Free(data); // Why does this crash?
return 0;
}
/* Assumes src and dest are arrays of 6 characters. */
-int NE2K_Send(struct NE2K_REGS *regs, uchar_t src[], uchar_t dest[], uint_t type, uchar_t *data, uint_t size)
+int NE2K_Send(uchar_t *packet, uint_t size)
+{
+ struct _CR * cr = (struct _CR*)&(regs->cr);
+ regs->cr = 0x21; /* Turn off remote DMA, stop command */
+ cr->stp = 0x0; /* toggle start on */
+ cr->sta = 0x1;
+ Out_Byte(NE2K_CR, regs->cr);
+
+ // Read-before-write bug fix?
+ Out_Byte(NE2K_RBCR0, 0x42);
+ Out_Byte(NE2K_RBCR1, 0x00);
+ Out_Byte(NE2K_RSAR0, 0x42);
+ Out_Byte(NE2K_RSAR1, 0x00);
+
+ cr->rd = 0x01; /* set remote DMA to 'remote read' */
+ Out_Byte(NE2K_CR, regs->cr);
+
+ regs->isr = 0x40; /* clear 'remote DMA complete' interrupt */
+ Out_Byte(NE2K_ISR, regs->isr);
+
+ /* Set remote byte count registers */
+ Out_Byte(NE2K_RBCR0, size & 0xff);
+ Out_Byte(NE2K_RBCR1, (size >> 8) & 0xff);
+
+ /* Set transmit byte count registers. */
+ Out_Byte(NE2K_TBCR0, size & 0xff);
+ Out_Byte(NE2K_TBCR1, (size >> 8) & 0xff);
+
+ /* Set remote start address registers to the first page of the transmit ring buffer. */
+ Out_Byte(NE2K_RSAR0, 0x00);
+ Out_Byte(NE2K_RSAR1, TX_START_BUFF);
+
+ cr->rd = 0x02; /* Set remote DMA to 'remote write' */
+ Out_Byte(NE2K_CR, regs->cr);
+
+ /* Push the packet data to into the dataport */
+ uint_t i;
+ for(i = 0; i < size; i += 2) {
+ Out_Word(NE2K_CR + 0x10, (*(packet + i + 1) << 8) | *(packet + i));
+ }
+
+ cr->txp = 0x1; /* Start transmission */
+ Out_Byte(NE2K_CR, regs->cr);
+
+ return 0;
+}
+
+#if 0
+/* Assumes src and dest are arrays of 6 characters. */
+int NE2K_Send2(uchar_t src[], uchar_t dest[], uint_t type, uchar_t *data, uint_t size)
{
struct _CR * cr = (struct _CR*)&(regs->cr);
uint_t packet_size = size + 16;
- regs->cr = 0x21;
- cr->stp = 0x0; //toggle start on
+ regs->cr = 0x21; /* Turn off remote DMA, stop command */
+ cr->stp = 0x0; /* toggle start on */
cr->sta = 0x1;
Out_Byte(NE2K_CR, regs->cr);
Out_Byte(NE2K_RSAR0, 0x42);
Out_Byte(NE2K_RSAR1, 0x00);
- cr->rd = 0x01; // set remote DMA to 'remote read'
+ cr->rd = 0x01; /* set remote DMA to 'remote read' */
Out_Byte(NE2K_CR, regs->cr);
- regs->isr = 0x40; // clear and set Remote DMA high
+ regs->isr = 0x40; /* clear 'remote DMA complete' interrupt */
Out_Byte(NE2K_ISR, regs->isr);
/* Set remote byte count registers */
Out_Byte(NE2K_TBCR0, packet_size & 0xff);
Out_Byte(NE2K_TBCR1, (packet_size >> 8) & 0xff);
+ /* Set remote start address registers to the first page of the transmit ring buffer. */
Out_Byte(NE2K_RSAR0, 0x00);
Out_Byte(NE2K_RSAR1, TX_START_BUFF);
- regs->cr = 0x16;
+ cr->rd = 0x02; /* Set remote DMA to 'remote write' */
Out_Byte(NE2K_CR, regs->cr);
+ /* Begin pushing the packet into the dataport (located at 0x10 from the base address). */
/* Destination Address */
Out_Word(NE2K_CR + 0x10, (dest[1] << 8) | dest[0]);
Out_Word(NE2K_CR + 0x10, (dest[3] << 8) | dest[2]);
/* Type */
Out_Word(NE2K_CR + 0x10, packet_size);
+ /* Packet data */
uint_t i;
for(i = 0; i < size; i += 2) {
Out_Word(NE2K_CR + 0x10, (*(data + i + 1) << 8) | *(data + i));
}
+ cr->txp = 0x1; /* Start transmission */
+ Out_Byte(NE2K_CR, regs->cr);
+
return 0;
}
+#endif
int NE2K_Receive()
{
uint_t i;
uint_t data;
- PrintBoth("\nPacket data:\n\t");
-
data = In_Word(NE2K_CR + 0x10);
+
+#if DEBUG
+ PrintBoth("\nPacket data:\n\t");
PrintBoth("%x ", data);
+#endif
/* Get the location of the next packet */
next = data & 0xff00;
/* Copy the received packet over from the ring buffer. */
for(i = 0; i < packet_size; i+=2) {
data = In_Word(NE2K_CR + 0x10);
- //PrintBoth("%x ", data);
*(packet + i) = data & 0x00ff;
*(packet + i + 1) = (data & 0xff00) >> 8;
#if 0
PrintBoth("CURR = %x\n", In_Byte(NE2K_CURR));
Out_Byte(NE2K_CR, 0x0a);
#endif
-
- //if(!(i%10))
- //PrintBoth("\n\t");
}
//Out_Byte(NE2K_RBCR0, (In_Byte(NE2K_RBCR0))-2);