blob: db4666f894e5bbd08490915a7e25e47c8e7a51d1 [file] [log] [blame]
/*
* 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/serial.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>
#define MAX_PORTS 3
struct serial_card_type {
unsigned int num_ports;
unsigned int baud_base;
unsigned int type;
unsigned int offset[MAX_PORTS];
};
struct serial_card_info {
unsigned int num_ports;
int ports[MAX_PORTS];
};
static inline int
serial_register_onedev(unsigned long baddr, void *vaddr, int irq, unsigned int baud_base)
{
struct serial_struct req;
memset(&req, 0, sizeof(req));
req.irq = irq;
req.flags = UPF_AUTOPROBE | UPF_RESOURCES |
UPF_SHARE_IRQ;
req.baud_base = baud_base;
req.io_type = UPIO_MEM;
req.iomem_base = vaddr;
req.iomem_reg_shift = 2;
req.iomap_base = baddr;
return register_serial(&req);
}
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;
unsigned long bus_addr;
unsigned char *virt_addr;
unsigned int port;
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;
ecard_set_drvdata(ec, info);
bus_addr = ec->resource[type->type].start;
virt_addr = ioremap(bus_addr, ec->resource[type->type].end - bus_addr + 1);
if (!virt_addr) {
kfree(info);
return -ENOMEM;
}
for (port = 0; port < info->num_ports; port ++) {
unsigned long baddr = bus_addr + type->offset[port];
unsigned char *vaddr = virt_addr + type->offset[port];
info->ports[port] = serial_register_onedev(baddr, vaddr,
ec->irq, type->baud_base);
}
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)
unregister_serial(info->ports[i]);
kfree(info);
}
static struct serial_card_type atomwide_type = {
.num_ports = 3,
.baud_base = 7372800 / 16,
.type = ECARD_RES_IOCSLOW,
.offset = { 0x2800, 0x2400, 0x2000 },
};
static struct serial_card_type serport_type = {
.num_ports = 2,
.baud_base = 3686400 / 16,
.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 = {
.devclass = &tty_devclass,
.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);