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/*
* CTC / LCS ccw_device driver
*
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Arnd Bergmann <arndb@de.ibm.com>
* Cornelia Huck <cornelia.huck@de.ibm.com>
*
* 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, 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.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/err.h>
#include <asm/s390_rdev.h>
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include "cu3088.h"
const char *cu3088_type[] = {
"not a channel",
"CTC/A",
"ESCON channel",
"FICON channel",
"P390 LCS card",
"OSA LCS card",
"CLAW channel device",
"unknown channel type",
"unsupported channel type",
};
/* static definitions */
static struct ccw_device_id cu3088_ids[] = {
{ CCW_DEVICE(0x3088, 0x08), .driver_info = channel_type_parallel },
{ CCW_DEVICE(0x3088, 0x1f), .driver_info = channel_type_escon },
{ CCW_DEVICE(0x3088, 0x1e), .driver_info = channel_type_ficon },
{ CCW_DEVICE(0x3088, 0x01), .driver_info = channel_type_p390 },
{ CCW_DEVICE(0x3088, 0x60), .driver_info = channel_type_osa2 },
{ CCW_DEVICE(0x3088, 0x61), .driver_info = channel_type_claw },
{ /* end of list */ }
};
static struct ccw_driver cu3088_driver;
struct device *cu3088_root_dev;
static ssize_t
group_write(struct device_driver *drv, const char *buf, size_t count)
{
const char *start, *end;
char bus_ids[2][BUS_ID_SIZE], *argv[2];
int i;
int ret;
struct ccwgroup_driver *cdrv;
cdrv = to_ccwgroupdrv(drv);
if (!cdrv)
return -EINVAL;
start = buf;
for (i=0; i<2; i++) {
static const char delim[] = {',', '\n'};
int len;
if (!(end = strchr(start, delim[i])))
return -EINVAL;
len = min_t(ptrdiff_t, BUS_ID_SIZE, end - start + 1);
strlcpy (bus_ids[i], start, len);
argv[i] = bus_ids[i];
start = end + 1;
}
ret = ccwgroup_create(cu3088_root_dev, cdrv->driver_id,
&cu3088_driver, 2, argv);
return (ret == 0) ? count : ret;
}
static DRIVER_ATTR(group, 0200, NULL, group_write);
/* Register-unregister for ctc&lcs */
int
register_cu3088_discipline(struct ccwgroup_driver *dcp)
{
int rc;
if (!dcp)
return -EINVAL;
/* Register discipline.*/
rc = ccwgroup_driver_register(dcp);
if (rc)
return rc;
rc = driver_create_file(&dcp->driver, &driver_attr_group);
if (rc)
ccwgroup_driver_unregister(dcp);
return rc;
}
void
unregister_cu3088_discipline(struct ccwgroup_driver *dcp)
{
if (!dcp)
return;
driver_remove_file(&dcp->driver, &driver_attr_group);
ccwgroup_driver_unregister(dcp);
}
static struct ccw_driver cu3088_driver = {
.owner = THIS_MODULE,
.ids = cu3088_ids,
.name = "cu3088",
.probe = ccwgroup_probe_ccwdev,
.remove = ccwgroup_remove_ccwdev,
};
/* module setup */
static int __init
cu3088_init (void)
{
int rc;
cu3088_root_dev = s390_root_dev_register("cu3088");
if (IS_ERR(cu3088_root_dev))
return PTR_ERR(cu3088_root_dev);
rc = ccw_driver_register(&cu3088_driver);
if (rc)
s390_root_dev_unregister(cu3088_root_dev);
return rc;
}
static void __exit
cu3088_exit (void)
{
ccw_driver_unregister(&cu3088_driver);
s390_root_dev_unregister(cu3088_root_dev);
}
MODULE_DEVICE_TABLE(ccw,cu3088_ids);
MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
MODULE_LICENSE("GPL");
module_init(cu3088_init);
module_exit(cu3088_exit);
EXPORT_SYMBOL_GPL(cu3088_type);
EXPORT_SYMBOL_GPL(register_cu3088_discipline);
EXPORT_SYMBOL_GPL(unregister_cu3088_discipline);
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