/* Generic NS8390 register definitions. */
/* This file is part of Donald Becker's 8390 drivers, and is distributed
   under the same license. Auto-loading of 8390.o only in v2.2 - Paul G.
   Some of these names and comments originated from the Crynwr
   packet drivers, which are distributed under the GPL. */

#ifndef _8390_h
#define _8390_h

#include <linux/config.h>
#include <linux/if_ether.h>
#include <linux/ioport.h>
#include <linux/skbuff.h>

#define TX_2X_PAGES 12
#define TX_1X_PAGES 6

#define TX_PAGES TX_2X_PAGES

#define ETHER_ADDR_LEN 6

/* The 8390 specific per-packet-header format. */
struct e8390_pkt_hdr {
  unsigned char status; /* status */
  unsigned char next;   /* pointer to next packet. */
  unsigned short count; /* header + packet length in bytes */
};

#ifdef notdef
extern int ei_debug;
#else
#define ei_debug 1
#endif

#ifndef HAVE_AUTOIRQ
/* From auto_irq.c */
extern void autoirq_setup(int waittime);
extern unsigned long autoirq_report(int waittime);
#endif

/* Most of these entries should be in 'struct net_device' (or most of the
   things in there should be here!) */
/* You have one of these per-board */
struct ei_device {
	const char *name;
	void (*reset_8390)(struct net_device *);
	void (*get_8390_hdr)(struct net_device *, struct e8390_pkt_hdr *, int);
	void (*block_output)(struct net_device *, int, const unsigned char *, int);
	void (*block_input)(struct net_device *, int, struct sk_buff *, int);
	unsigned char mcfilter[8];
	unsigned open:1;
	unsigned word16:1;  		/* We have the 16-bit (vs 8-bit) version of the card. */
	unsigned txing:1;		/* Transmit Active */
	unsigned irqlock:1;		/* 8390's intrs disabled when '1'. */
	unsigned dmaing:1;		/* Remote DMA Active */
	unsigned char tx_start_page, rx_start_page, stop_page;
	unsigned char current_page;	/* Read pointer in buffer  */
	unsigned char interface_num;	/* Net port (AUI, 10bT.) to use. */
	unsigned char txqueue;		/* Tx Packet buffer queue length. */
	short tx1, tx2;			/* Packet lengths for ping-pong tx. */
	short lasttx;			/* Alpha version consistency check. */
	unsigned char saved_irq;	/* Original dev->irq value. */
	struct net_device_stats stat;	/* The new statistics table. */
	spinlock_t page_lock;		/* Page register locks */
	unsigned long priv;		/* Private field to store bus IDs etc. */
};

/* The maximum number of 8390 interrupt service routines called per IRQ. */
#define MAX_SERVICE 12

/* The maximum time waited (in jiffies) before assuming a Tx failed. (20ms) */
#define TX_TIMEOUT (20*HZ/100)

#define ei_status (*(struct ei_device *)(dev->priv))

/* Some generic ethernet register configurations. */
#define E8390_TX_IRQ_MASK	0xa	/* For register EN0_ISR */
#define E8390_RX_IRQ_MASK	0x5
#define E8390_RXCONFIG		0x4	/* EN0_RXCR: broadcasts, no multicast,errors */
#define E8390_RXOFF		0x20	/* EN0_RXCR: Accept no packets */
#define E8390_TXCONFIG		0x00	/* EN0_TXCR: Normal transmit mode */
#define E8390_TXOFF		0x02	/* EN0_TXCR: Transmitter off */

/*  Register accessed at EN_CMD, the 8390 base addr.  */
#define E8390_STOP	0x01	/* Stop and reset the chip */
#define E8390_START	0x02	/* Start the chip, clear reset */
#define E8390_TRANS	0x04	/* Transmit a frame */
#define E8390_RREAD	0x08	/* Remote read */
#define E8390_RWRITE	0x10	/* Remote write  */
#define E8390_NODMA	0x20	/* Remote DMA */
#define E8390_PAGE0	0x00	/* Select page chip registers */
#define E8390_PAGE1	0x40	/* using the two high-order bits */
#define E8390_PAGE2	0x80	/* Page 3 is invalid. */

#define E8390_CMD	0x00	/* The command register (for all pages) */
/* Page 0 register offsets. */
#define EN0_CLDALO	0x01	/* Low byte of current local dma addr  RD */
#define EN0_STARTPG	0x01	/* Starting page of ring bfr WR */
#define EN0_CLDAHI	0x02	/* High byte of current local dma addr  RD */
#define EN0_STOPPG	0x02	/* Ending page +1 of ring bfr WR */
#define EN0_BOUNDARY	0x03	/* Boundary page of ring bfr RD WR */
#define EN0_TSR		0x04	/* Transmit status reg RD */
#define EN0_TPSR	0x04	/* Transmit starting page WR */
#define EN0_NCR		0x05	/* Number of collision reg RD */
#define EN0_TCNTLO	0x05	/* Low  byte of tx byte count WR */
#define EN0_FIFO	0x06	/* FIFO RD */
#define EN0_TCNTHI	0x06	/* High byte of tx byte count WR */
#define EN0_ISR		0x07	/* Interrupt status reg RD WR */
#define EN0_CRDALO	0x08	/* low byte of current remote dma address RD */
#define EN0_RSARLO	0x08	/* Remote start address reg 0 */
#define EN0_CRDAHI	0x09	/* high byte, current remote dma address RD */
#define EN0_RSARHI	0x09	/* Remote start address reg 1 */
#define EN0_RCNTLO	0x0a	/* Remote byte count reg WR */
#define EN0_RCNTHI	0x0b	/* Remote byte count reg WR */
#define EN0_RSR		0x0c	/* rx status reg RD */
#define EN0_RXCR	0x0c	/* RX configuration reg WR */
#define EN0_TXCR	0x0d	/* TX configuration reg WR */
#define EN0_COUNTER0	0x0d	/* Rcv alignment error counter RD */
#define EN0_DCFG	0x0e	/* Data configuration reg WR */
#define EN0_COUNTER1	0x0e	/* Rcv CRC error counter RD */
#define EN0_IMR		0x0f	/* Interrupt mask reg WR */
#define EN0_COUNTER2	0x0f	/* Rcv missed frame error counter RD */

/* Bits in EN0_ISR - Interrupt status register */
#define ENISR_RX	0x01	/* Receiver, no error */
#define ENISR_TX	0x02	/* Transmitter, no error */
#define ENISR_RX_ERR	0x04	/* Receiver, with error */
#define ENISR_TX_ERR	0x08	/* Transmitter, with error */
#define ENISR_OVER	0x10	/* Receiver overwrote the ring */
#define ENISR_COUNTERS	0x20	/* Counters need emptying */
#define ENISR_RDC	0x40	/* remote dma complete */
#define ENISR_RESET	0x80	/* Reset completed */
#define ENISR_ALL	0x3f	/* Interrupts we will enable */

/* Bits in EN0_DCFG - Data config register */
#define ENDCFG_WTS	0x01	/* word transfer mode selection */

/* Page 1 register offsets. */
#define EN1_PHYS   	0x01	/* This board's physical enet addr RD WR */
#define EN1_PHYS_SHIFT(i)  (i+1) /* Get and set mac address */
#define EN1_CURPAG 	0x07	/* Current memory page RD WR */
#define EN1_MULT   	0x08	/* Multicast filter mask array (8 bytes) RD WR */
#define EN1_MULT_SHIFT(i)  (8+i) /* Get and set multicast filter */

/* Bits in received packet status byte and EN0_RSR*/
#define ENRSR_RXOK	0x01	/* Received a good packet */
#define ENRSR_CRC	0x02	/* CRC error */
#define ENRSR_FAE	0x04	/* frame alignment error */
#define ENRSR_FO	0x08	/* FIFO overrun */
#define ENRSR_MPA	0x10	/* missed pkt */
#define ENRSR_PHY	0x20	/* physical/multicast address */
#define ENRSR_DIS	0x40	/* receiver disable. set in monitor mode */
#define ENRSR_DEF	0x80	/* deferring */

/* Transmitted packet status, EN0_TSR. */
#define ENTSR_PTX 0x01	/* Packet transmitted without error */
#define ENTSR_ND  0x02	/* The transmit wasn't deferred. */
#define ENTSR_COL 0x04	/* The transmit collided at least once. */
#define ENTSR_ABT 0x08  /* The transmit collided 16 times, and was deferred. */
#define ENTSR_CRS 0x10	/* The carrier sense was lost. */
#define ENTSR_FU  0x20  /* A "FIFO underrun" occurred during transmit. */
#define ENTSR_CDH 0x40	/* The collision detect "heartbeat" signal was lost. */
#define ENTSR_OWC 0x80  /* There was an out-of-window collision. */

#endif /* _8390_h */
