void threecom3c505_device::recv_cb(UINT8 *data, int length)
{
if (length < ETHERNET_ADDR_SIZE || !ethernet_packet_is_for_me(data))
{
// skip packet
}
else if (!m_rx_fifo.put(data, length))
{
m_netstat.tot_recv++;
m_netstat.err_ovrrun++;
// fifo overrun
LOG1(("recv_cb: data_length=%x !!! RX FIFO OVERRUN !!!", length));
}
else
{
m_netstat.tot_recv++;
LOG2(("recv_cb: data_length=%x m_rx_pending=%d", length, m_rx_pending));
if (m_rx_data_buffer.get_length() == 0)
{
m_rx_fifo.get(&m_rx_data_buffer);
}
if (!m_command_pending && m_rx_pending > 0
&& m_rx_data_buffer.get_length() > 0)
{
m_rx_pending--;
set_command_pending(1);
do_receive_command();
}
}
}
void threecom3c505_device::set_command_pending(int onoff)
{
m_command_pending = onoff;
LOG2(("set_command_pending %d m_rx_pending=%d m_rx_data_buffer.get_length()=%x%s",
m_command_pending, m_rx_pending, m_rx_data_buffer.get_length(), onoff ? "" :"\n"));
//- verbose = onoff ? 1 : 2;
if (!m_command_pending)
{
// clear previous command byte
m_command_buffer[0] = 0;
m_mc_f9_pending = 0;
m_wait_for_ack = 0;
if (m_rx_pending > 0 && m_rx_data_buffer.get_length() > 0)
{
m_rx_pending--;
m_command_pending = 1;
LOG2(("set_command_pending %d m_rx_pending=%d", m_command_pending, m_rx_pending));
do_receive_command();
}
}
}
void threecom3c505_device::set_command_pending(int state)
{
LOG2(("set_command_pending %d -> %d m_wait_for_ack=%d m_wait_for_nak=%d m_rx_pending=%d%s",
m_command_pending, state, m_wait_for_ack, m_wait_for_nak, m_rx_pending, state ? "" :"\n"));
//- verbose = onoff ? 1 : 2;
switch (state)
{
case 0:
// command is no longer pending
m_command_pending = 0;
// clear previous command byte
m_command_buffer[0] = 0;
m_wait_for_ack = 0;
m_wait_for_nak = 0;
do_receive_command();
break;
case 1:
// command is pending
m_command_pending = 1;
break;
case 2:
// wait for nak/ack
if (m_microcode_running && m_microcode_version == APOLLO_MC_VERSION_SR10_4)
{
m_wait_for_nak = 1;
}
else
{
m_wait_for_ack = 1;
}
break;
default:
LOG(("set_command_pending %d unexpected" , state));
break;
}
}
void threecom3c505_device::do_command()
{
// default to successful completion
m_response.command = m_command_buffer[0] + CMD_RESPONSE_OFFSET;
m_response.length = 1;
m_response.data.failed = 0; // successful completion
switch (m_command_buffer[0])
{
case CMD_RESET: // 0x00
// FIXME:
// device_reset();
break;
case CMD_CONFIGURE_ADAPTER_MEMORY: // 0x01
m_i82586_config = m_program_buffer.get_word(1);
break;
case CMD_RECEIVE_PACKET: // 0x08
if (m_rx_data_buffer.get_length() == 0 && !m_rx_fifo.get(&m_rx_data_buffer))
{
// receive data not yet available
m_rx_pending++;
set_command_pending(0);
}
else
{
do_receive_command();
}
return;
// break;
case CMD_MC_F9:
m_response.command = CMD_TRANSMIT_PACKET_COMPLETE;
// fall through
case CMD_TRANSMIT_PACKET: // 0x09
case CMD_TRANSMIT_PACKET_18: // 0x18
m_response.length = 8;
m_response.data.xmit_resp.buf_ofs = 0;
m_response.data.xmit_resp.buf_seg = 0;
m_response.data.xmit_resp.c_stat = 0; // successful completion
m_response.data.xmit_resp.status = 0;
break;
case CMD_EXECUTE_PROGRAM: // 0x0e
m_response.length = 0;
m_microcode_running = 1;
m_microcode_version = m_program_buffer.get_word(1);
break;
case CMD_NETWORK_STATISTICS: // 0x0a
m_response.length = sizeof(struct Netstat);
// response data must be LSB first!
m_response.data.netstat.tot_recv = lsb_first(m_netstat.tot_recv);
m_response.data.netstat.tot_xmit = lsb_first(m_netstat.tot_xmit);
m_response.data.netstat.err_CRC = lsb_first(m_netstat.err_CRC);
m_response.data.netstat.err_align = lsb_first(m_netstat.err_align);
m_response.data.netstat.err_res = lsb_first(m_netstat.err_res);
m_response.data.netstat.err_ovrrun = lsb_first(m_netstat.err_ovrrun);
break;
case CMD_ADAPTER_INFO: // 0x11
m_response.length = sizeof(struct Info);
// FIXME: replace test data; must be LSB first!
m_response.data.info.minor_vers = 1;
m_response.data.info.major_vers = 2;
m_response.data.info.ROM_cksum = lsb_first(3);
m_response.data.info.RAM_sz = lsb_first(4);
m_response.data.info.free_ofs = lsb_first(5);
m_response.data.info.free_seg = lsb_first(6);
break;
case CMD_LOAD_MULTICAST_LIST:// 0x0b
if (m_command_buffer[1] > sizeof(m_multicast_list) ||
(m_command_buffer[1] % ETHERNET_ADDR_SIZE) != 0)
{
LOG(("CMD_LOAD_MULTICAST_LIST - !!! unexpected data size %d !!!", m_command_buffer[1]));
}
else
{
memset(m_multicast_list, 0 , sizeof(m_multicast_list));
memcpy(m_multicast_list, m_command_buffer+2 , m_command_buffer[1]-2);
set_filter_list();
}
break;
case CMD_SET_STATION_ADDRESS: // 0x10
if (m_command_buffer[1] != sizeof(m_station_address))
{
LOG(("CMD_SET_STATION_ADDRESS - !!! unexpected data size %d !!!", m_command_buffer[1]));
memset(m_station_address, 0 , sizeof(m_station_address));
}
else
{
memcpy(m_station_address, m_command_buffer+2 , m_command_buffer[1]);
}
set_filter_list();
set_mac((char *)m_station_address);
break;
case CMD_CONFIGURE_82586: // 0x02
case CMD_DOWNLOAD_PROGRAM: // 0x0d
case CMD_MC_17: // 0x17
default:
break;
}
m_response_index = 0;
m_response_length = m_response.length + 2;
m_status |= ACRF; /* adapter command register full */
if (m_control & CMDE)
{
switch (m_command_buffer[0])
{
case CMD_NETWORK_STATISTICS: // 0x0a
case CMD_DOWNLOAD_PROGRAM: // 0xd
case CMD_EXECUTE_PROGRAM: // 0x0e
case CMD_ADAPTER_INFO: // 0x11
// interrupt later
m_timer->adjust( attotime::from_msec(5));
break;
default:
// interrupt at once
set_interrupt(ASSERT_LINE);
break;
}
}
}