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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;
struct tty_port port;
unsigned int portnr;
unsigned int panelnr;
unsigned int brdnr;
int ioaddr;
int uartaddr;
unsigned int pagenr;
unsigned long istate;
int baud_base;
int custom_divisor;
int close_delay;
int closing_wait;
int openwaitcnt;
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