/* * 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);