diff options
Diffstat (limited to 'drivers/s390/net/cu3088.c')
| -rw-r--r-- | drivers/s390/net/cu3088.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/drivers/s390/net/cu3088.c b/drivers/s390/net/cu3088.c new file mode 100644 index 00000000000..1b0a9f16024 --- /dev/null +++ b/drivers/s390/net/cu3088.c @@ -0,0 +1,166 @@ +/* + * $Id: cu3088.c,v 1.34 2004/06/15 13:16:27 pavlic Exp $ + * + * CTC / LCS ccw_device driver + * + * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation + * Author(s): Arnd Bergmann <arndb@de.ibm.com> + * Cornelia Huck <cohuck@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/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", + "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 }, + { /* 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 count; + 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); |