Viewing file:  serial-card.c (2.89 KB) -rw-r--r--
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/*
* linux/drivers/acorn/char/serial-card.c
*
* Copyright (C) 1996-1999 Russell King.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* A generic handler of serial expansion cards that use 16550s or
* the like.
*
* Definitions:
* MY_PRODS Product numbers to identify this card by
* MY_MANUS Manufacturer numbers to identify this card by
* MY_NUMPORTS Number of ports per card
* MY_BAUD_BASE Baud base for the card
* MY_INIT Initialisation routine name
* MY_BASE_ADDRESS(ec) Return base address for ports
* MY_PORT_ADDRESS
* (port,cardaddr) Return address for port using base address
* from above.
*
* Changelog:
* 30-07-1996 RMK Created
* 22-04-1998 RMK Removed old register_pre_init_serial
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/serial.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <asm/ecard.h>
#include <asm/string.h>
#ifndef NUM_SERIALS
#define NUM_SERIALS MY_NUMPORTS * MAX_ECARDS
#endif
#ifdef MODULE
static int __serial_ports[NUM_SERIALS];
static int __serial_pcount;
static int __serial_addr[NUM_SERIALS];
static struct expansion_card *expcard[MAX_ECARDS];
#define ADD_ECARD(ec,card) expcard[(card)] = (ec)
#define ADD_PORT(port,addr) \
do { \
__serial_ports[__serial_pcount] = (port); \
__serial_addr[__serial_pcount] = (addr); \
__serial_pcount += 1; \
} while (0)
#else
#define ADD_ECARD(ec,card)
#define ADD_PORT(port,addr)
#endif
static const card_ids serial_cids[] = { MY_CARD_LIST, { 0xffff, 0xffff } };
static inline int serial_register_onedev (unsigned long port, int irq)
{
struct serial_struct req;
memset(&req, 0, sizeof(req));
req.baud_base = MY_BAUD_BASE;
req.irq = irq;
req.port = port;
req.flags = 0;
return register_serial(&req);
}
static int __init INIT (void)
{
int card = 0;
ecard_startfind ();
do {
struct expansion_card *ec;
unsigned long cardaddr;
int port;
ec = ecard_find (0, serial_cids);
if (!ec)
break;
cardaddr = MY_BASE_ADDRESS(ec);
for (port = 0; port < MY_NUMPORTS; port ++) {
unsigned long address;
int line;
address = MY_PORT_ADDRESS(port, cardaddr);
line = serial_register_onedev (address, ec->irq);
if (line < 0)
break;
ADD_PORT(line, address);
}
if (port) {
ecard_claim (ec);
ADD_ECARD(ec, card);
} else
break;
} while (++card < MAX_ECARDS);
return card ? 0 : -ENODEV;
}
static void __exit EXIT (void)
{
#ifdef MODULE
int i;
for (i = 0; i < __serial_pcount; i++) {
unregister_serial(__serial_ports[i]);
release_region(__serial_addr[i], 8);
}
for (i = 0; i < MAX_ECARDS; i++)
if (expcard[i])
ecard_release (expcard[i]);
#endif
}
EXPORT_NO_SYMBOLS;
MODULE_LICENSE("GPL");
module_init(INIT);
module_exit(EXIT);
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