f12ad7d59a
ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad <amol@verismonetworks.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
144 lines
3.2 KiB
C
144 lines
3.2 KiB
C
/*
|
|
* linux/drivers/serial/acorn.c
|
|
*
|
|
* Copyright (C) 1996-2003 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.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/device.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/ecard.h>
|
|
#include <asm/string.h>
|
|
|
|
#include "8250.h"
|
|
|
|
#define MAX_PORTS 3
|
|
|
|
struct serial_card_type {
|
|
unsigned int num_ports;
|
|
unsigned int uartclk;
|
|
unsigned int type;
|
|
unsigned int offset[MAX_PORTS];
|
|
};
|
|
|
|
struct serial_card_info {
|
|
unsigned int num_ports;
|
|
int ports[MAX_PORTS];
|
|
void __iomem *vaddr;
|
|
};
|
|
|
|
static int __devinit
|
|
serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
|
|
{
|
|
struct serial_card_info *info;
|
|
struct serial_card_type *type = id->data;
|
|
struct uart_port port;
|
|
unsigned long bus_addr;
|
|
unsigned int i;
|
|
|
|
info = kmalloc(sizeof(struct serial_card_info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
memset(info, 0, sizeof(struct serial_card_info));
|
|
info->num_ports = type->num_ports;
|
|
|
|
bus_addr = ecard_resource_start(ec, type->type);
|
|
info->vaddr = ioremap(bus_addr, ecard_resource_len(ec, type->type));
|
|
if (!info->vaddr) {
|
|
kfree(info);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ecard_set_drvdata(ec, info);
|
|
|
|
memset(&port, 0, sizeof(struct uart_port));
|
|
port.irq = ec->irq;
|
|
port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
|
|
port.uartclk = type->uartclk;
|
|
port.iotype = UPIO_MEM;
|
|
port.regshift = 2;
|
|
port.dev = &ec->dev;
|
|
|
|
for (i = 0; i < info->num_ports; i ++) {
|
|
port.membase = info->vaddr + type->offset[i];
|
|
port.mapbase = bus_addr + type->offset[i];
|
|
|
|
info->ports[i] = serial8250_register_port(&port);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __devexit serial_card_remove(struct expansion_card *ec)
|
|
{
|
|
struct serial_card_info *info = ecard_get_drvdata(ec);
|
|
int i;
|
|
|
|
ecard_set_drvdata(ec, NULL);
|
|
|
|
for (i = 0; i < info->num_ports; i++)
|
|
if (info->ports[i] > 0)
|
|
serial8250_unregister_port(info->ports[i]);
|
|
|
|
iounmap(info->vaddr);
|
|
kfree(info);
|
|
}
|
|
|
|
static struct serial_card_type atomwide_type = {
|
|
.num_ports = 3,
|
|
.uartclk = 7372800,
|
|
.type = ECARD_RES_IOCSLOW,
|
|
.offset = { 0x2800, 0x2400, 0x2000 },
|
|
};
|
|
|
|
static struct serial_card_type serport_type = {
|
|
.num_ports = 2,
|
|
.uartclk = 3686400,
|
|
.type = ECARD_RES_IOCSLOW,
|
|
.offset = { 0x2000, 0x2020 },
|
|
};
|
|
|
|
static const struct ecard_id serial_cids[] = {
|
|
{ MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type },
|
|
{ MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type },
|
|
{ 0xffff, 0xffff }
|
|
};
|
|
|
|
static struct ecard_driver serial_card_driver = {
|
|
.probe = serial_card_probe,
|
|
.remove = __devexit_p(serial_card_remove),
|
|
.id_table = serial_cids,
|
|
.drv = {
|
|
.name = "8250_acorn",
|
|
},
|
|
};
|
|
|
|
static int __init serial_card_init(void)
|
|
{
|
|
return ecard_register_driver(&serial_card_driver);
|
|
}
|
|
|
|
static void __exit serial_card_exit(void)
|
|
{
|
|
ecard_remove_driver(&serial_card_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Russell King");
|
|
MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(serial_card_init);
|
|
module_exit(serial_card_exit);
|