Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * CTC / LCS ccw_device driver |
| 3 | * |
| 4 | * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| 5 | * Author(s): Arnd Bergmann <arndb@de.ibm.com> |
Cornelia Huck | 4ce3b30 | 2006-01-14 13:21:04 -0800 | [diff] [blame] | 6 | * Cornelia Huck <cornelia.huck@de.ibm.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2, or (at your option) |
| 11 | * any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | * |
| 22 | */ |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/init.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/err.h> |
| 27 | |
| 28 | #include <asm/ccwdev.h> |
| 29 | #include <asm/ccwgroup.h> |
| 30 | |
| 31 | #include "cu3088.h" |
| 32 | |
| 33 | const char *cu3088_type[] = { |
| 34 | "not a channel", |
| 35 | "CTC/A", |
| 36 | "ESCON channel", |
| 37 | "FICON channel", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | "OSA LCS card", |
Frank Pavlic | 321de3c | 2005-05-12 20:17:46 +0200 | [diff] [blame] | 39 | "CLAW channel device", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | "unknown channel type", |
| 41 | "unsupported channel type", |
| 42 | }; |
| 43 | |
| 44 | /* static definitions */ |
| 45 | |
| 46 | static struct ccw_device_id cu3088_ids[] = { |
| 47 | { CCW_DEVICE(0x3088, 0x08), .driver_info = channel_type_parallel }, |
| 48 | { CCW_DEVICE(0x3088, 0x1f), .driver_info = channel_type_escon }, |
| 49 | { CCW_DEVICE(0x3088, 0x1e), .driver_info = channel_type_ficon }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | { CCW_DEVICE(0x3088, 0x60), .driver_info = channel_type_osa2 }, |
Frank Pavlic | 321de3c | 2005-05-12 20:17:46 +0200 | [diff] [blame] | 51 | { CCW_DEVICE(0x3088, 0x61), .driver_info = channel_type_claw }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | { /* end of list */ } |
| 53 | }; |
| 54 | |
| 55 | static struct ccw_driver cu3088_driver; |
| 56 | |
Heiko Carstens | 2b67fc4 | 2007-02-05 21:16:47 +0100 | [diff] [blame] | 57 | static struct device *cu3088_root_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | static ssize_t |
| 60 | group_write(struct device_driver *drv, const char *buf, size_t count) |
| 61 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | int ret; |
| 63 | struct ccwgroup_driver *cdrv; |
| 64 | |
| 65 | cdrv = to_ccwgroupdrv(drv); |
| 66 | if (!cdrv) |
| 67 | return -EINVAL; |
Ursula Braun | 022b660 | 2008-04-24 10:15:20 +0200 | [diff] [blame] | 68 | ret = ccwgroup_create_from_string(cu3088_root_dev, cdrv->driver_id, |
| 69 | &cu3088_driver, 2, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | return (ret == 0) ? count : ret; |
| 72 | } |
| 73 | |
| 74 | static DRIVER_ATTR(group, 0200, NULL, group_write); |
| 75 | |
| 76 | /* Register-unregister for ctc&lcs */ |
| 77 | int |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 78 | register_cu3088_discipline(struct ccwgroup_driver *dcp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
| 80 | int rc; |
| 81 | |
| 82 | if (!dcp) |
| 83 | return -EINVAL; |
| 84 | |
| 85 | /* Register discipline.*/ |
| 86 | rc = ccwgroup_driver_register(dcp); |
| 87 | if (rc) |
| 88 | return rc; |
| 89 | |
| 90 | rc = driver_create_file(&dcp->driver, &driver_attr_group); |
| 91 | if (rc) |
| 92 | ccwgroup_driver_unregister(dcp); |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | return rc; |
| 95 | |
| 96 | } |
| 97 | |
| 98 | void |
| 99 | unregister_cu3088_discipline(struct ccwgroup_driver *dcp) |
| 100 | { |
| 101 | if (!dcp) |
| 102 | return; |
| 103 | |
| 104 | driver_remove_file(&dcp->driver, &driver_attr_group); |
| 105 | ccwgroup_driver_unregister(dcp); |
| 106 | } |
| 107 | |
| 108 | static struct ccw_driver cu3088_driver = { |
| 109 | .owner = THIS_MODULE, |
| 110 | .ids = cu3088_ids, |
| 111 | .name = "cu3088", |
| 112 | .probe = ccwgroup_probe_ccwdev, |
| 113 | .remove = ccwgroup_remove_ccwdev, |
| 114 | }; |
| 115 | |
| 116 | /* module setup */ |
| 117 | static int __init |
| 118 | cu3088_init (void) |
| 119 | { |
| 120 | int rc; |
Jeff Garzik | e82b0f2 | 2006-05-26 21:58:38 -0400 | [diff] [blame] | 121 | |
Mark McLoughlin | 035da16 | 2008-12-15 12:58:29 +0000 | [diff] [blame] | 122 | cu3088_root_dev = root_device_register("cu3088"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | if (IS_ERR(cu3088_root_dev)) |
| 124 | return PTR_ERR(cu3088_root_dev); |
| 125 | rc = ccw_driver_register(&cu3088_driver); |
| 126 | if (rc) |
Mark McLoughlin | 035da16 | 2008-12-15 12:58:29 +0000 | [diff] [blame] | 127 | root_device_unregister(cu3088_root_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | return rc; |
| 130 | } |
| 131 | |
| 132 | static void __exit |
| 133 | cu3088_exit (void) |
| 134 | { |
| 135 | ccw_driver_unregister(&cu3088_driver); |
Mark McLoughlin | 035da16 | 2008-12-15 12:58:29 +0000 | [diff] [blame] | 136 | root_device_unregister(cu3088_root_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | MODULE_DEVICE_TABLE(ccw,cu3088_ids); |
| 140 | MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); |
| 141 | MODULE_LICENSE("GPL"); |
| 142 | |
| 143 | module_init(cu3088_init); |
| 144 | module_exit(cu3088_exit); |
| 145 | |
| 146 | EXPORT_SYMBOL_GPL(cu3088_type); |
| 147 | EXPORT_SYMBOL_GPL(register_cu3088_discipline); |
| 148 | EXPORT_SYMBOL_GPL(unregister_cu3088_discipline); |