Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * IBM PowerPC IBM eBus Infrastructure Support. |
| 3 | * |
| 4 | * Copyright (c) 2005 IBM Corporation |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 5 | * Joachim Fenkes <fenkes@de.ibm.com> |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 6 | * Heiko J Schick <schickhj@de.ibm.com> |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 7 | * |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 8 | * All rights reserved. |
| 9 | * |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 10 | * This source code is distributed under a dual license of GPL v2.0 and OpenIB |
| 11 | * BSD. |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 12 | * |
| 13 | * OpenIB BSD License |
| 14 | * |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 15 | * Redistribution and use in source and binary forms, with or without |
| 16 | * modification, are permitted provided that the following conditions are met: |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 17 | * |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 18 | * Redistributions of source code must retain the above copyright notice, this |
| 19 | * list of conditions and the following disclaimer. |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 20 | * |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 21 | * Redistributions in binary form must reproduce the above copyright notice, |
| 22 | * this list of conditions and the following disclaimer in the documentation |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 23 | * and/or other materials |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 24 | * provided with the distribution. |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 25 | * |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 27 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 30 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 31 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 33 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 34 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 35 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 36 | * POSSIBILITY OF SUCH DAMAGE. |
| 37 | */ |
| 38 | |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/console.h> |
| 41 | #include <linux/kobject.h> |
| 42 | #include <linux/dma-mapping.h> |
| 43 | #include <linux/interrupt.h> |
Grant Likely | 283029d | 2008-01-09 06:20:40 +1100 | [diff] [blame] | 44 | #include <linux/of.h> |
Joachim Fenkes | a988c0a | 2007-09-26 19:44:57 +1000 | [diff] [blame] | 45 | #include <linux/of_platform.h> |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 46 | #include <asm/ibmebus.h> |
| 47 | #include <asm/abs_addr.h> |
| 48 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 49 | static struct device ibmebus_bus_device = { /* fake "parent" device */ |
| 50 | .bus_id = "ibmebus", |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 51 | }; |
| 52 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 53 | struct bus_type ibmebus_bus_type; |
| 54 | |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 55 | /* These devices will automatically be added to the bus during init */ |
Paul Gortmaker | 1b17adf1 | 2008-07-08 08:42:09 +1000 | [diff] [blame] | 56 | static struct of_device_id __initdata ibmebus_matches[] = { |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 57 | { .compatible = "IBM,lhca" }, |
| 58 | { .compatible = "IBM,lhea" }, |
| 59 | {}, |
| 60 | }; |
| 61 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 62 | static void *ibmebus_alloc_coherent(struct device *dev, |
| 63 | size_t size, |
| 64 | dma_addr_t *dma_handle, |
| 65 | gfp_t flag) |
| 66 | { |
| 67 | void *mem; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 68 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 69 | mem = kmalloc(size, flag); |
| 70 | *dma_handle = (dma_addr_t)mem; |
| 71 | |
| 72 | return mem; |
| 73 | } |
| 74 | |
| 75 | static void ibmebus_free_coherent(struct device *dev, |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 76 | size_t size, void *vaddr, |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 77 | dma_addr_t dma_handle) |
| 78 | { |
| 79 | kfree(vaddr); |
| 80 | } |
| 81 | |
| 82 | static dma_addr_t ibmebus_map_single(struct device *dev, |
| 83 | void *ptr, |
| 84 | size_t size, |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame] | 85 | enum dma_data_direction direction, |
| 86 | struct dma_attrs *attrs) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 87 | { |
| 88 | return (dma_addr_t)(ptr); |
| 89 | } |
| 90 | |
| 91 | static void ibmebus_unmap_single(struct device *dev, |
| 92 | dma_addr_t dma_addr, |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 93 | size_t size, |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame] | 94 | enum dma_data_direction direction, |
| 95 | struct dma_attrs *attrs) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 96 | { |
| 97 | return; |
| 98 | } |
| 99 | |
| 100 | static int ibmebus_map_sg(struct device *dev, |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 101 | struct scatterlist *sgl, |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame] | 102 | int nents, enum dma_data_direction direction, |
| 103 | struct dma_attrs *attrs) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 104 | { |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 105 | struct scatterlist *sg; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 106 | int i; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 107 | |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 108 | for_each_sg(sgl, sg, nents, i) { |
Jens Axboe | 58b053e | 2007-10-22 20:02:46 +0200 | [diff] [blame] | 109 | sg->dma_address = (dma_addr_t) sg_virt(sg); |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame] | 110 | sg->dma_length = sg->length; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 111 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 112 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 113 | return nents; |
| 114 | } |
| 115 | |
| 116 | static void ibmebus_unmap_sg(struct device *dev, |
| 117 | struct scatterlist *sg, |
Mark Nelson | 3affedc | 2008-07-05 05:05:42 +1000 | [diff] [blame] | 118 | int nents, enum dma_data_direction direction, |
| 119 | struct dma_attrs *attrs) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 120 | { |
| 121 | return; |
| 122 | } |
| 123 | |
| 124 | static int ibmebus_dma_supported(struct device *dev, u64 mask) |
| 125 | { |
| 126 | return 1; |
| 127 | } |
| 128 | |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 129 | static struct dma_mapping_ops ibmebus_dma_ops = { |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 130 | .alloc_coherent = ibmebus_alloc_coherent, |
| 131 | .free_coherent = ibmebus_free_coherent, |
| 132 | .map_single = ibmebus_map_single, |
| 133 | .unmap_single = ibmebus_unmap_single, |
| 134 | .map_sg = ibmebus_map_sg, |
| 135 | .unmap_sg = ibmebus_unmap_sg, |
| 136 | .dma_supported = ibmebus_dma_supported, |
| 137 | }; |
| 138 | |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 139 | static int ibmebus_match_path(struct device *dev, void *data) |
| 140 | { |
| 141 | struct device_node *dn = to_of_device(dev)->node; |
| 142 | return (dn->full_name && |
| 143 | (strcasecmp((char *)data, dn->full_name) == 0)); |
| 144 | } |
| 145 | |
| 146 | static int ibmebus_match_node(struct device *dev, void *data) |
| 147 | { |
| 148 | return to_of_device(dev)->node == data; |
| 149 | } |
| 150 | |
| 151 | static int ibmebus_create_device(struct device_node *dn) |
| 152 | { |
| 153 | struct of_device *dev; |
| 154 | int ret; |
| 155 | |
| 156 | dev = of_device_alloc(dn, NULL, &ibmebus_bus_device); |
| 157 | if (!dev) |
| 158 | return -ENOMEM; |
| 159 | |
| 160 | dev->dev.bus = &ibmebus_bus_type; |
| 161 | dev->dev.archdata.dma_ops = &ibmebus_dma_ops; |
| 162 | |
| 163 | ret = of_device_register(dev); |
| 164 | if (ret) { |
| 165 | of_device_free(dev); |
| 166 | return ret; |
| 167 | } |
| 168 | |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | static int ibmebus_create_devices(const struct of_device_id *matches) |
| 173 | { |
| 174 | struct device_node *root, *child; |
| 175 | int ret = 0; |
| 176 | |
| 177 | root = of_find_node_by_path("/"); |
| 178 | |
Stephen Rothwell | 85e99b9 | 2008-01-03 15:13:37 +1100 | [diff] [blame] | 179 | for_each_child_of_node(root, child) { |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 180 | if (!of_match_node(matches, child)) |
| 181 | continue; |
| 182 | |
| 183 | if (bus_find_device(&ibmebus_bus_type, NULL, child, |
| 184 | ibmebus_match_node)) |
| 185 | continue; |
| 186 | |
| 187 | ret = ibmebus_create_device(child); |
| 188 | if (ret) { |
| 189 | printk(KERN_ERR "%s: failed to create device (%i)", |
Harvey Harrison | e48b1b4 | 2008-03-29 08:21:07 +1100 | [diff] [blame] | 190 | __func__, ret); |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 191 | of_node_put(child); |
| 192 | break; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | of_node_put(root); |
| 197 | return ret; |
| 198 | } |
| 199 | |
Joachim Fenkes | 6b08f3a | 2007-09-26 19:45:51 +1000 | [diff] [blame] | 200 | int ibmebus_register_driver(struct of_platform_driver *drv) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 201 | { |
Joachim Fenkes | 6b08f3a | 2007-09-26 19:45:51 +1000 | [diff] [blame] | 202 | /* If the driver uses devices that ibmebus doesn't know, add them */ |
| 203 | ibmebus_create_devices(drv->match_table); |
| 204 | |
Stephen Rothwell | 745c2ef | 2008-01-14 17:46:48 +1100 | [diff] [blame] | 205 | return of_register_driver(drv, &ibmebus_bus_type); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 206 | } |
| 207 | EXPORT_SYMBOL(ibmebus_register_driver); |
| 208 | |
Joachim Fenkes | 6b08f3a | 2007-09-26 19:45:51 +1000 | [diff] [blame] | 209 | void ibmebus_unregister_driver(struct of_platform_driver *drv) |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 210 | { |
Stephen Rothwell | 745c2ef | 2008-01-14 17:46:48 +1100 | [diff] [blame] | 211 | of_unregister_driver(drv); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 212 | } |
| 213 | EXPORT_SYMBOL(ibmebus_unregister_driver); |
| 214 | |
Joachim Fenkes | 6b08f3a | 2007-09-26 19:45:51 +1000 | [diff] [blame] | 215 | int ibmebus_request_irq(u32 ist, irq_handler_t handler, |
| 216 | unsigned long irq_flags, const char *devname, |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 217 | void *dev_id) |
| 218 | { |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 219 | unsigned int irq = irq_create_mapping(NULL, ist); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 220 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 221 | if (irq == NO_IRQ) |
| 222 | return -EINVAL; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 223 | |
Joachim Fenkes | 6b08f3a | 2007-09-26 19:45:51 +1000 | [diff] [blame] | 224 | return request_irq(irq, handler, irq_flags, devname, dev_id); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 225 | } |
| 226 | EXPORT_SYMBOL(ibmebus_request_irq); |
| 227 | |
Joachim Fenkes | 6b08f3a | 2007-09-26 19:45:51 +1000 | [diff] [blame] | 228 | void ibmebus_free_irq(u32 ist, void *dev_id) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 229 | { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 230 | unsigned int irq = irq_find_mapping(NULL, ist); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 231 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 232 | free_irq(irq, dev_id); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 233 | } |
| 234 | EXPORT_SYMBOL(ibmebus_free_irq); |
| 235 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 236 | static ssize_t name_show(struct device *dev, |
| 237 | struct device_attribute *attr, char *buf) |
| 238 | { |
Joachim Fenkes | 6b08f3a | 2007-09-26 19:45:51 +1000 | [diff] [blame] | 239 | return sprintf(buf, "%s\n", to_of_device(dev)->node->name); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | static struct device_attribute ibmebus_dev_attrs[] = { |
| 243 | __ATTR_RO(name), |
| 244 | __ATTR_NULL |
| 245 | }; |
| 246 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 247 | static char *ibmebus_chomp(const char *in, size_t count) |
| 248 | { |
Jesper Juhl | 61a564f | 2007-08-24 09:45:08 +1000 | [diff] [blame] | 249 | char *out = kmalloc(count + 1, GFP_KERNEL); |
| 250 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 251 | if (!out) |
| 252 | return NULL; |
| 253 | |
| 254 | memcpy(out, in, count); |
| 255 | out[count] = '\0'; |
| 256 | if (out[count - 1] == '\n') |
| 257 | out[count - 1] = '\0'; |
| 258 | |
| 259 | return out; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | static ssize_t ibmebus_store_probe(struct bus_type *bus, |
| 263 | const char *buf, size_t count) |
| 264 | { |
| 265 | struct device_node *dn = NULL; |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 266 | char *path; |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 267 | ssize_t rc = 0; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 268 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 269 | path = ibmebus_chomp(buf, count); |
| 270 | if (!path) |
| 271 | return -ENOMEM; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 272 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 273 | if (bus_find_device(&ibmebus_bus_type, NULL, path, |
Joachim Fenkes | 74c9b99 | 2007-09-26 19:46:34 +1000 | [diff] [blame] | 274 | ibmebus_match_path)) { |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 275 | printk(KERN_WARNING "%s: %s has already been probed\n", |
Harvey Harrison | e48b1b4 | 2008-03-29 08:21:07 +1100 | [diff] [blame] | 276 | __func__, path); |
Joachim Fenkes | 74c9b99 | 2007-09-26 19:46:34 +1000 | [diff] [blame] | 277 | rc = -EEXIST; |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 278 | goto out; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 279 | } |
| 280 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 281 | if ((dn = of_find_node_by_path(path))) { |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 282 | rc = ibmebus_create_device(dn); |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 283 | of_node_put(dn); |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 284 | } else { |
| 285 | printk(KERN_WARNING "%s: no such device node: %s\n", |
Harvey Harrison | e48b1b4 | 2008-03-29 08:21:07 +1100 | [diff] [blame] | 286 | __func__, path); |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 287 | rc = -ENODEV; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 288 | } |
| 289 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 290 | out: |
| 291 | kfree(path); |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 292 | if (rc) |
| 293 | return rc; |
| 294 | return count; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | static ssize_t ibmebus_store_remove(struct bus_type *bus, |
| 298 | const char *buf, size_t count) |
| 299 | { |
| 300 | struct device *dev; |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 301 | char *path; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 302 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 303 | path = ibmebus_chomp(buf, count); |
| 304 | if (!path) |
| 305 | return -ENOMEM; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 306 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 307 | if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path, |
| 308 | ibmebus_match_path))) { |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 309 | of_device_unregister(to_of_device(dev)); |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 310 | |
| 311 | kfree(path); |
| 312 | return count; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 313 | } else { |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 314 | printk(KERN_WARNING "%s: %s not on the bus\n", |
Harvey Harrison | e48b1b4 | 2008-03-29 08:21:07 +1100 | [diff] [blame] | 315 | __func__, path); |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 316 | |
| 317 | kfree(path); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 318 | return -ENODEV; |
| 319 | } |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | static struct bus_attribute ibmebus_bus_attrs[] = { |
| 323 | __ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe), |
| 324 | __ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove), |
| 325 | __ATTR_NULL |
| 326 | }; |
| 327 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 328 | struct bus_type ibmebus_bus_type = { |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 329 | .uevent = of_device_uevent, |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 330 | .dev_attrs = ibmebus_dev_attrs, |
| 331 | .bus_attrs = ibmebus_bus_attrs |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 332 | }; |
| 333 | EXPORT_SYMBOL(ibmebus_bus_type); |
| 334 | |
| 335 | static int __init ibmebus_bus_init(void) |
| 336 | { |
| 337 | int err; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 338 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 339 | printk(KERN_INFO "IBM eBus Device Driver\n"); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 340 | |
Joachim Fenkes | a988c0a | 2007-09-26 19:44:57 +1000 | [diff] [blame] | 341 | err = of_bus_type_init(&ibmebus_bus_type, "ibmebus"); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 342 | if (err) { |
Joachim Fenkes | a988c0a | 2007-09-26 19:44:57 +1000 | [diff] [blame] | 343 | printk(KERN_ERR "%s: failed to register IBM eBus.\n", |
Harvey Harrison | e48b1b4 | 2008-03-29 08:21:07 +1100 | [diff] [blame] | 344 | __func__); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 345 | return err; |
| 346 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 347 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 348 | err = device_register(&ibmebus_bus_device); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 349 | if (err) { |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 350 | printk(KERN_WARNING "%s: device_register returned %i\n", |
Harvey Harrison | e48b1b4 | 2008-03-29 08:21:07 +1100 | [diff] [blame] | 351 | __func__, err); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 352 | bus_unregister(&ibmebus_bus_type); |
| 353 | |
| 354 | return err; |
| 355 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 356 | |
Paul Gortmaker | 1b17adf1 | 2008-07-08 08:42:09 +1000 | [diff] [blame] | 357 | err = ibmebus_create_devices(ibmebus_matches); |
Joachim Fenkes | 55347cc | 2007-09-26 19:45:21 +1000 | [diff] [blame] | 358 | if (err) { |
| 359 | device_unregister(&ibmebus_bus_device); |
| 360 | bus_unregister(&ibmebus_bus_type); |
| 361 | return err; |
| 362 | } |
| 363 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 364 | return 0; |
| 365 | } |
Joachim Fenkes | a988c0a | 2007-09-26 19:44:57 +1000 | [diff] [blame] | 366 | postcore_initcall(ibmebus_bus_init); |