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/*****************************************************************************/

/*

 *      stallion.h  -- stallion multiport serial driver.

 *

 *      Copyright (C) 1996-1998  Stallion Technologies

 *      Copyright (C) 1994-1996  Greg Ungerer.

 *

 *      This program is free software; you can redistribute it and/or modify

 *      it under the terms of the GNU General Public License as published by

 *      the Free Software Foundation; either version 2 of the License, or

 *      (at your option) any later version.

 *

 *      This program is distributed in the hope that it will be useful,

 *      but WITHOUT ANY WARRANTY; without even the implied warranty of

 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *      GNU General Public License for more details.

 *

 *      You should have received a copy of the GNU General Public License

 *      along with this program; if not, write to the Free Software

 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

/*****************************************************************************/

#ifndef _STALLION_H

#define _STALLION_H

/*****************************************************************************/

/*

 *      Define important driver constants here.

 */

#define STL_MAXBRDS             4

#define STL_MAXPANELS           4

#define STL_MAXBANKS            8

#define STL_PORTSPERPANEL       16

#define STL_MAXPORTS            64

#define STL_MAXDEVS             (STL_MAXBRDS * STL_MAXPORTS)

/*

 *      Define a set of structures to hold all the board/panel/port info

 *      for our ports. These will be dynamically allocated as required.

 */

/*

 *      Define a ring queue structure for each port. This will hold the

 *      TX data waiting to be output. Characters are fed into this buffer

 *      from the line discipline (or even direct from user space!) and

 *      then fed into the UARTs during interrupts. Will use a classic ring

 *      queue here for this. The good thing about this type of ring queue

 *      is that the head and tail pointers can be updated without interrupt

 *      protection - since "write" code only needs to change the head, and

 *      interrupt code only needs to change the tail.

 */

struct stlrq {

        char    *buf;

        char    *head;

        char    *tail;

};

/*

 *      Port, panel and board structures to hold status info about each.

 *      The board structure contains pointers to structures for each panel

 *      connected to it, and in turn each panel structure contains pointers

 *      for each port structure for each port on that panel. Note that

 *      the port structure also contains the board and panel number that it

 *      is associated with, this makes it (fairly) easy to get back to the

 *      board/panel info for a port.

 */

struct stlport {

        unsigned long           magic;

        unsigned int            portnr;

        unsigned int            panelnr;

        unsigned int            brdnr;

        int                     ioaddr;

        int                     uartaddr;

        unsigned int            pagenr;

        unsigned long           istate;

        int                     flags;

        int                     baud_base;

        int                     custom_divisor;

        int                     close_delay;

        int                     closing_wait;

        int                     refcount;

        int                     openwaitcnt;

        int                     brklen;

        unsigned int            sigs;

        unsigned int            rxignoremsk;

        unsigned int            rxmarkmsk;

        unsigned int            imr;

        unsigned int            crenable;

        unsigned long           clk;

        unsigned long           hwid;

        void                    *uartp;

        struct tty_struct       *tty;

        wait_queue_head_t       open_wait;

        wait_queue_head_t       close_wait;

        struct work_struct      tqueue;

        comstats_t              stats;

        struct stlrq            tx;

};

struct stlpanel {

        unsigned long   magic;

        unsigned int    panelnr;

        unsigned int    brdnr;

        unsigned int    pagenr;

        unsigned int    nrports;

        int             iobase;

        void            *uartp;

        void            (*isr)(struct stlpanel *panelp, unsigned int iobase);

        unsigned int    hwid;

        unsigned int    ackmask;

        struct stlport  *ports[STL_PORTSPERPANEL];

};

struct stlbrd {

        unsigned long   magic;

        unsigned int    brdnr;

        unsigned int    brdtype;

        unsigned int    state;

        unsigned int    nrpanels;

        unsigned int    nrports;

        unsigned int    nrbnks;

        int             irq;

        int             irqtype;

        int             (*isr)(struct stlbrd *brdp);

        unsigned int    ioaddr1;

        unsigned int    ioaddr2;

        unsigned int    iosize1;

        unsigned int    iosize2;

        unsigned int    iostatus;

        unsigned int    ioctrl;

        unsigned int    ioctrlval;

        unsigned int    hwid;

        unsigned long   clk;

        unsigned int    bnkpageaddr[STL_MAXBANKS];

        unsigned int    bnkstataddr[STL_MAXBANKS];

        struct stlpanel *bnk2panel[STL_MAXBANKS];

        struct stlpanel *panels[STL_MAXPANELS];

};

/*

 *      Define MAGIC numbers used for above structures.

 */

#define STL_PORTMAGIC   0x5a7182c9

#define STL_PANELMAGIC  0x7ef621a1

#define STL_BOARDMAGIC  0xa2267f52

/*****************************************************************************/

#endif