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/*
 * Linux ARCnet driver - COM20020 chipset support - function declarations
 *
 * Written 1997 by David Woodhouse.
 * Written 1994-1999 by Avery Pennarun.
 * Derived from skeleton.c by Donald Becker.
 *
 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
 *  for sponsoring the further development of this driver.
 *
 * **********************
 *
 * The original copyright of skeleton.c was as follows:
 *
 * skeleton.c Written 1993 by Donald Becker.
 * Copyright 1993 United States Government as represented by the
 * Director, National Security Agency.  This software may only be used
 * and distributed according to the terms of the GNU General Public License as
 * modified by SRC, incorporated herein by reference.
 *
 * **********************
 *
 * For more details, see drivers/net/arcnet.c
 *
 * **********************
 */
#ifndef __COM20020_H
#define __COM20020_H

int com20020_check(struct net_device *dev);
int com20020_found(struct net_device *dev, int shared);
void com20020_remove(struct net_device *dev);

/* The number of low I/O ports used by the card. */
#define ARCNET_TOTAL_SIZE 8

/* various register addresses */
#define _INTMASK  (ioaddr+0)    /* writable */
#define _STATUS   (ioaddr+0)    /* readable */
#define _COMMAND  (ioaddr+1)    /* standard arcnet commands */
#define _DIAGSTAT (ioaddr+1)    /* diagnostic status register */
#define _ADDR_HI  (ioaddr+2)    /* control registers for IO-mapped memory */
#define _ADDR_LO  (ioaddr+3)
#define _MEMDATA  (ioaddr+4)    /* data port for IO-mapped memory */
#define _SUBADR   (ioaddr+5)    /* the extended port _XREG refers to */
#define _CONFIG   (ioaddr+6)    /* configuration register */
#define _XREG     (ioaddr+7)    /* extra registers (indexed by _CONFIG
                                        or _SUBADR) */

/* in the ADDR_HI register */
#define RDDATAflag      0x80    /* next access is a read (not a write) */

/* in the DIAGSTAT register */
#define NEWNXTIDflag    0x02    /* ID to which token is passed has changed */

/* in the CONFIG register */
#define RESETcfg        0x80    /* put card in reset state */
#define TXENcfg         0x20    /* enable TX */

/* in SETUP register */
#define PROMISCset      0x10    /* enable RCV_ALL */
#define P1MODE          0x80    /* enable P1-MODE for Backplane */
#define SLOWARB         0x01    /* enable Slow Arbitration for >=5Mbps */

/* COM2002x */
#define SUB_TENTATIVE   0       /* tentative node ID */
#define SUB_NODE        1       /* node ID */
#define SUB_SETUP1      2       /* various options */
#define SUB_TEST        3       /* test/diag register */

/* COM20022 only */
#define SUB_SETUP2      4       /* sundry options */
#define SUB_BUSCTL      5       /* bus control options */
#define SUB_DMACOUNT    6       /* DMA count options */

#define SET_SUBADR(x) do { \
        if ((x) < 4) \
        { \
                lp->config = (lp->config & ~0x03) | (x); \
                SETCONF; \
        } \
        else \
        { \
                outb(x, _SUBADR); \
        } \
} while (0)

#undef ARCRESET
#undef ASTATUS
#undef ACOMMAND
#undef AINTMASK

#define ARCRESET { outb(lp->config | 0x80, _CONFIG); \
                    udelay(5);                        \
                    outb(lp->config , _CONFIG);       \
                  }
#define ARCRESET0 { outb(0x18 | 0x80, _CONFIG);   \
                    udelay(5);                       \
                    outb(0x18 , _CONFIG);            \
                  }

#define ASTATUS()       inb(_STATUS)
#define ACOMMAND(cmd)   outb((cmd),_COMMAND)
#define AINTMASK(msk)   outb((msk),_INTMASK)

#define SETCONF         outb(lp->config, _CONFIG)

#endif /* __COM20020_H */