// Ne2000.h: interface for the CNe2000 class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_NE2000_H__9F497E86_4CD1_4D0E_8D3E_195294B52FF8__INCLUDED_)
#define AFX_NE2000_H__9F497E86_4CD1_4D0E_8D3E_195294B52FF8__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

#include <kernel/driver.h>
#include <kernel/sys.h>

#define PSTART			0x20	/* if NE2000 is byte length */
#define PSTOP			0x40
#define PSTARTW			0x40	/* if NE2000 is wordlength */
#define PSTOPW			0x80
#define MAX_LOAD		12	/* maximum services per IRQ request*/
#define MAX_RX			10	/* maximum packets recieve per call*/
#define MIN_LENGTH		60	/* minimum length for packet data */
#define MAX_LENGTH		1500	/* maximum length for packet data area */
#define TIMEOUT_DMAMATCH	40	/* for nic_block_input() */
#define TIMEOUT_TX		40

/* DP8390 NIC Registers*/
#define COMMAND			0x00
#define STATUS			COMMAND+0
#define PHYSICAL		COMMAND+1	/* page 1 */
#define MULTICAST		COMMAND+8	/* page 1 */
#define	PAGESTART		COMMAND+1	/* page 0 */
#define PAGESTOP		COMMAND+2
#define BOUNDARY		COMMAND+3
#define TRANSMITSTATUS		COMMAND+4
#define TRANSMITPAGE		COMMAND+4
#define TRANSMITBYTECOUNT0	COMMAND+5
#define NCR			COMMAND+5
#define TRANSMITBYTECOUNT1	COMMAND+6
#define INTERRUPTSTATUS		COMMAND+7
#define CURRENT			COMMAND+7	/* page 1 */
#define REMOTESTARTADDRESS0	COMMAND+8
#define CRDMA0			COMMAND+8
#define REMOTESTARTADDRESS1	COMMAND+9
#define CRDMA1			COMMAND+9
#define REMOTEBYTECOUNT0	COMMAND+10	/* how many bytes we will */
#define REMOTEBYTECOUNT1	COMMAND+11	/* read through remote DMA->IO */
#define RECEIVESTATUS		COMMAND+12
#define RECEIVECONFIGURATION	COMMAND+12
#define TRANSMITCONFIGURATION	COMMAND+13
#define FAE_TALLY		COMMAND+13	/* page 0 */
#define DATACONFIGURATION	COMMAND+14
#define CRC_TALLY		COMMAND+14
#define INTERRUPTMASK		COMMAND+15
#define MISS_PKT_TALLY		COMMAND+15

/* NE2000 specific implementation registers */
#define NE_RESET	0x1f	/* Reset */
#define NE_DATA		0x10	/* Data port (use for PROM) */

#define PAR0			COMMAND+1
#define PAR1			COMMAND+2
#define PAR2			COMMAND+3
#define PAR3			COMMAND+4
#define PAR4			COMMAND+5
#define PAR5			COMMAND+6

/* NIC Commands */
#define NIC_STOP	0x01	/* STOP */
#define NIC_START	0x02	/* START */
#define NIC_PAGE0	0x00
#define	NIC_PAGE1	0x40
#define NIC_PAGE2	0x80
#define NIC_TRANSMIT	0x04	/* Transmit a frame */
#define NIC_REM_READ	0x08	/* Remote Read */
#define NIC_REM_WRITE	0x10	/* Remote Write */
#define NIC_DMA_DISABLE	0x20	/* Disable DMA */

/* Data Configuration Register */
#define DCR_WTS		0x01	/* Word Transfer Select (0=byte, 1=word) */
#define DCR_BOS		0x02	/* Byte Order Select (0=big-endian) */
#define DCR_LAS		0x04	/* Long Address Select (0=dual 16-bit DMA) */
#define	DCR_LS		0x08	/* Loopback Select (0=loopback) */
#define DCR_AR		0x10	/* Auto Initialize Remote */
#define DCR_FT		0x60	/* (FT0 & FT1) FIFO Threshhold (see datasheet) */
/*#define DCR_DEFAULT	0x58	Standard value for the DCR register */
#define DCR_DEFAULT	0x48	/* don't use Automatic send packet */
#define DCR_DEFAULT_WORD 0x49	/* defuault with wold length transfer */

/* Recieve Configure Register */
#define RCR_SEP		0x01	/* Save Errored Packets */
#define RCR_AR		0x02	/* Accept Runt Packets */
#define RCR_AB		0x04	/* Accept Broadcast */
#define RCR_AM		0x08	/* Accept Multicast */
#define RCR_PRO		0x10	/* Promiscuous Physical */
#define RCR_MON		0x20	/* Monitor Mode */
/*#define RCR_DEFAULT	0x00	 Standard value for the RCR register */
#define RCR_DEFAULT	0x0c	/* Accept Broadcast/Multicast Packets */

/* Recieve Status Register */
/* note, this is also stored in the status byte in the buffer header. */
/* That's the 4 byte entry in the local buffer, not the packet header. */
#define RSR_PRX		0x01	/* Pakcet Received Intact */
#define RSR_CRC		0x02	/* CRC Error */
#define RSR_FAE		0x04	/* Frame Alignment Error */
#define RSR_FO		0x08	/* FIFO Overrun */
#define RSR_MPA		0x10	/* Missed Packet */
#define RSR_PHY		0x20	/* Physical/Multicast Address (0=physical) */
#define RSR_DIS		0x40	/* Receiver Disabled */
#define RSR_DFR		0x80	/* Deferring */

/* Transmit Configure Register */
#define TCR_CRC		0x01	/* Inhibit CRC (0=CRC active) */
#define TCR_LB		0x06	/* (LB0 & LB1) Encoded Loopback Control */
#define TCR_ATD		0x08	/* Auto Transmit Disable (0=normal) */
#define TCR_OFST	0x10	/* Collision Offset Enable (1=low priority) */
#define TCR_DEFAULT	0x00	/* Standard value for the TCR register */
#define TCR_INTERNAL_LOOPBACK 0x02 /* Internal loopback configuration */

/* Transmit Status Register */
#define TSR_PTX		0x01	/* Packet Transmitted */
#define TSR_ND		0x02	/* Non-Deferral (Documented???) */
#define TSR_COL		0x04	/* Transmit Collided */
#define TSR_ABT		0x08	/* Transmit Aborted */
#define TSR_CRS		0x10	/* Carrier Sense Lost */
#define TSR_FU		0x20	/* FIFO Underrun */
#define TSR_CDH		0x40	/* CD Heartbeat */
#define TSR_OWC		0x80	/* Oout of Window Collision */

/* Interrupt Status Register */
#define ISR_PRX		0x01	/* Packet Received */
#define ISR_PTX		0x02	/* Packet Transmitted */
#define ISR_RXE		0x04	/* Receive Error */
#define ISR_TXE		0x08	/* Transmit Error */
#define ISR_OVW		0x10	/* Overwrite Warning */
#define ISR_CNT		0x20	/* Counter Overflow */
#define ISR_RDC		0x40	/* Remote DMA Complete */
#define ISR_RST		0x80	/* Reset Status */
#define ISR_DEFAULT	0x00	/* Standard value for the ISR register */
#define ISR_ALL		0x3f	/* The services that we handle in the isr */

/* Interrupt Mask Register */
#define IMR_PRXE	0x01	/* Packet Received Interrupt Enable */
#define IMR_PTXE	0x02	/* Packet Transmitted Interrupt Enable */
#define IMR_RXEE	0x04	/* Receive Error Interrupt Enable */
#define IMR_TXEE	0x08	/* Transmit Error Interrupt Enable */
#define IMR_OVWE	0x10	/* Overwrite Warning Interrupt Enable */
#define IMR_CNTE	0x20	/* Counter Overflow Interrupt Enable */
#define IMR_RDCE	0x40	/* DMA Complete Interrupt Enable */
#define IMR_DEFAULT	0x3f	/* CNTE | OVWE | TXEE | RXEE | PTXE | PRXE */

struct packet_data_t {		/* each protocol layer can add it's own */
	dword len;
	byte *ptr;
};

struct packet_buffer_t {
	dword page;
	dword count, len;
	packet_data_t *buf;	/* An array of data segments */
};

struct nic_error_stat_t {
	long frame_alignment, crc, missed_packets;
	long rx, rx_size, rx_dropped, rx_fifo, rx_overruns;
	long tx_collisions;
	long tx_aborts, tx_carrier, tx_fifo, tx_heartbeat, tx_window;
};

struct nic_stat_t {
	long rx_packets;
	long tx_buffered, tx_packets;
	nic_error_stat_t errors;
};

struct buffer_header_t {
	unsigned char status;
	unsigned char next;
	unsigned short count;	/* length of header and packet */
};

#define LEN_PROM		16
#define MAX_TX			2	/* be careful with this (dual buffers) */
#define MAX_PAGESPERPACKET	6
#define TXPAGES			(MAX_TX*MAX_PAGESPERPACKET)
#define LEN_ADDR		6

class CNe2000 : 
	public IUnknown, 
	public IDevice  
{
public:
	CNe2000(word port);
	virtual ~CNe2000();

	static CNe2000* Detect();

	// IUnknown methods
	IMPLEMENT_IUNKNOWN(CNe2000);
	STDMETHOD(QueryInterface)(REFIID iid, void ** ppvObject);

	// IDevice methods
	STDMETHOD(GetInfo)(device_t* buf);
	STDMETHOD(DeviceOpen)();

protected:
	word m_port;
	int m_pstart, m_pstop, m_wordlength, m_current_page;
	nic_stat_t m_stat;
	//void (*notify)(void *passback, packet_data *newpacket);
	//void *kore;	/* Passback pointer */
	packet_buffer_t *m_tx_packet[MAX_TX], *m_last_tx;
	int m_busy, m_send, m_sending;

	static void Isr(dword ctx, int irq);

	bool Init(byte *prom, byte *manual);
	int DumpProm(byte *prom);
	void Start(bool promiscuous);

	void Overrun();
	void Transmit();
	void TransmitError();
	void GetHeader(dword page, buffer_header_t *header);
	void BlockInput(byte *buf, dword len, dword offset);
	void Receive();
	void Counters();

	int Send(dword buf);
};

#endif // !defined(AFX_NE2000_H__9F497E86_4CD1_4D0E_8D3E_195294B52FF8__INCLUDED_)