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> |
| 44 | #include <asm/ibmebus.h> |
| 45 | #include <asm/abs_addr.h> |
| 46 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 47 | static struct device ibmebus_bus_device = { /* fake "parent" device */ |
| 48 | .bus_id = "ibmebus", |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 49 | }; |
| 50 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 51 | struct bus_type ibmebus_bus_type; |
| 52 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 53 | static void *ibmebus_alloc_coherent(struct device *dev, |
| 54 | size_t size, |
| 55 | dma_addr_t *dma_handle, |
| 56 | gfp_t flag) |
| 57 | { |
| 58 | void *mem; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 59 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 60 | mem = kmalloc(size, flag); |
| 61 | *dma_handle = (dma_addr_t)mem; |
| 62 | |
| 63 | return mem; |
| 64 | } |
| 65 | |
| 66 | static void ibmebus_free_coherent(struct device *dev, |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 67 | size_t size, void *vaddr, |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 68 | dma_addr_t dma_handle) |
| 69 | { |
| 70 | kfree(vaddr); |
| 71 | } |
| 72 | |
| 73 | static dma_addr_t ibmebus_map_single(struct device *dev, |
| 74 | void *ptr, |
| 75 | size_t size, |
| 76 | enum dma_data_direction direction) |
| 77 | { |
| 78 | return (dma_addr_t)(ptr); |
| 79 | } |
| 80 | |
| 81 | static void ibmebus_unmap_single(struct device *dev, |
| 82 | dma_addr_t dma_addr, |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 83 | size_t size, |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 84 | enum dma_data_direction direction) |
| 85 | { |
| 86 | return; |
| 87 | } |
| 88 | |
| 89 | static int ibmebus_map_sg(struct device *dev, |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame^] | 90 | struct scatterlist *sgl, |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 91 | int nents, enum dma_data_direction direction) |
| 92 | { |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame^] | 93 | struct scatterlist *sg; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 94 | int i; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 95 | |
Jens Axboe | 78bdc31 | 2007-10-12 13:44:12 +0200 | [diff] [blame^] | 96 | for_each_sg(sgl, sg, nents, i) { |
| 97 | sg->dma_address = (dma_addr_t)page_address(sg->page) |
| 98 | + sg->offset; |
| 99 | sg->dma_length = sg->length; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 100 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 101 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 102 | return nents; |
| 103 | } |
| 104 | |
| 105 | static void ibmebus_unmap_sg(struct device *dev, |
| 106 | struct scatterlist *sg, |
| 107 | int nents, enum dma_data_direction direction) |
| 108 | { |
| 109 | return; |
| 110 | } |
| 111 | |
| 112 | static int ibmebus_dma_supported(struct device *dev, u64 mask) |
| 113 | { |
| 114 | return 1; |
| 115 | } |
| 116 | |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 117 | static struct dma_mapping_ops ibmebus_dma_ops = { |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 118 | .alloc_coherent = ibmebus_alloc_coherent, |
| 119 | .free_coherent = ibmebus_free_coherent, |
| 120 | .map_single = ibmebus_map_single, |
| 121 | .unmap_single = ibmebus_unmap_single, |
| 122 | .map_sg = ibmebus_map_sg, |
| 123 | .unmap_sg = ibmebus_unmap_sg, |
| 124 | .dma_supported = ibmebus_dma_supported, |
| 125 | }; |
| 126 | |
| 127 | static int ibmebus_bus_probe(struct device *dev) |
| 128 | { |
| 129 | struct ibmebus_dev *ibmebusdev = to_ibmebus_dev(dev); |
| 130 | struct ibmebus_driver *ibmebusdrv = to_ibmebus_driver(dev->driver); |
| 131 | const struct of_device_id *id; |
| 132 | int error = -ENODEV; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 133 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 134 | if (!ibmebusdrv->probe) |
| 135 | return error; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 136 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 137 | id = of_match_device(ibmebusdrv->id_table, &ibmebusdev->ofdev); |
| 138 | if (id) { |
| 139 | error = ibmebusdrv->probe(ibmebusdev, id); |
| 140 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 141 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 142 | return error; |
| 143 | } |
| 144 | |
| 145 | static int ibmebus_bus_remove(struct device *dev) |
| 146 | { |
| 147 | struct ibmebus_dev *ibmebusdev = to_ibmebus_dev(dev); |
| 148 | struct ibmebus_driver *ibmebusdrv = to_ibmebus_driver(dev->driver); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 149 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 150 | if (ibmebusdrv->remove) { |
| 151 | return ibmebusdrv->remove(ibmebusdev); |
| 152 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 153 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | static void __devinit ibmebus_dev_release(struct device *dev) |
| 158 | { |
| 159 | of_node_put(to_ibmebus_dev(dev)->ofdev.node); |
| 160 | kfree(to_ibmebus_dev(dev)); |
| 161 | } |
| 162 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 163 | static int __devinit ibmebus_register_device_common( |
Jeremy Kerr | a7f67bd | 2006-07-12 15:35:54 +1000 | [diff] [blame] | 164 | struct ibmebus_dev *dev, const char *name) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 165 | { |
| 166 | int err = 0; |
| 167 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 168 | dev->ofdev.dev.parent = &ibmebus_bus_device; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 169 | dev->ofdev.dev.bus = &ibmebus_bus_type; |
| 170 | dev->ofdev.dev.release = ibmebus_dev_release; |
| 171 | |
Benjamin Herrenschmidt | 12d04ee | 2006-11-11 17:25:02 +1100 | [diff] [blame] | 172 | dev->ofdev.dev.archdata.of_node = dev->ofdev.node; |
| 173 | dev->ofdev.dev.archdata.dma_ops = &ibmebus_dma_ops; |
| 174 | dev->ofdev.dev.archdata.numa_node = of_node_to_nid(dev->ofdev.node); |
| 175 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 176 | /* An ibmebusdev is based on a of_device. We have to change the |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 177 | * bus type to use our own DMA mapping operations. |
| 178 | */ |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 179 | if ((err = of_device_register(&dev->ofdev)) != 0) { |
| 180 | printk(KERN_ERR "%s: failed to register device (%d).\n", |
| 181 | __FUNCTION__, err); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 182 | return -ENODEV; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 183 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 184 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 185 | return 0; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | static struct ibmebus_dev* __devinit ibmebus_register_device_node( |
| 189 | struct device_node *dn) |
| 190 | { |
| 191 | struct ibmebus_dev *dev; |
Joachim Fenkes | d861241 | 2007-08-29 18:15:17 +0200 | [diff] [blame] | 192 | int i, len, bus_len; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 193 | |
Yan Burman | f848535 | 2006-12-02 13:26:57 +0200 | [diff] [blame] | 194 | dev = kzalloc(sizeof(struct ibmebus_dev), GFP_KERNEL); |
Joachim Fenkes | d861241 | 2007-08-29 18:15:17 +0200 | [diff] [blame] | 195 | if (!dev) |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 196 | return ERR_PTR(-ENOMEM); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 197 | |
| 198 | dev->ofdev.node = of_node_get(dn); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 199 | |
Joachim Fenkes | d861241 | 2007-08-29 18:15:17 +0200 | [diff] [blame] | 200 | len = strlen(dn->full_name + 1); |
| 201 | bus_len = min(len, BUS_ID_SIZE - 1); |
| 202 | memcpy(dev->ofdev.dev.bus_id, dn->full_name + 1 |
| 203 | + (len - bus_len), bus_len); |
| 204 | for (i = 0; i < bus_len; i++) |
| 205 | if (dev->ofdev.dev.bus_id[i] == '/') |
| 206 | dev->ofdev.dev.bus_id[i] = '_'; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 207 | |
| 208 | /* Register with generic device framework. */ |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 209 | if (ibmebus_register_device_common(dev, dn->name) != 0) { |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 210 | kfree(dev); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 211 | return ERR_PTR(-ENODEV); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | return dev; |
| 215 | } |
| 216 | |
| 217 | static void ibmebus_probe_of_nodes(char* name) |
| 218 | { |
| 219 | struct device_node *dn = NULL; |
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 | while ((dn = of_find_node_by_name(dn, name))) { |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 222 | if (IS_ERR(ibmebus_register_device_node(dn))) { |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 223 | of_node_put(dn); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 224 | return; |
| 225 | } |
| 226 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 227 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 228 | of_node_put(dn); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 229 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 230 | return; |
| 231 | } |
| 232 | |
| 233 | static void ibmebus_add_devices_by_id(struct of_device_id *idt) |
| 234 | { |
| 235 | while (strlen(idt->name) > 0) { |
| 236 | ibmebus_probe_of_nodes(idt->name); |
| 237 | idt++; |
| 238 | } |
| 239 | |
| 240 | return; |
| 241 | } |
| 242 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 243 | static int ibmebus_match_name(struct device *dev, void *data) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 244 | { |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 245 | const struct ibmebus_dev *ebus_dev = to_ibmebus_dev(dev); |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 246 | const char *name; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 247 | |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 248 | name = of_get_property(ebus_dev->ofdev.node, "name", NULL); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 249 | |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 250 | if (name && (strcmp(data, name) == 0)) |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 251 | return 1; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 252 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | static int ibmebus_unregister_device(struct device *dev) |
| 257 | { |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 258 | of_device_unregister(to_of_device(dev)); |
| 259 | |
| 260 | return 0; |
| 261 | } |
| 262 | |
| 263 | static void ibmebus_remove_devices_by_id(struct of_device_id *idt) |
| 264 | { |
| 265 | struct device *dev; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 266 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 267 | while (strlen(idt->name) > 0) { |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 268 | while ((dev = bus_find_device(&ibmebus_bus_type, NULL, |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 269 | (void*)idt->name, |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 270 | ibmebus_match_name))) { |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 271 | ibmebus_unregister_device(dev); |
| 272 | } |
| 273 | idt++; |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 274 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 275 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 276 | return; |
| 277 | } |
| 278 | |
| 279 | int ibmebus_register_driver(struct ibmebus_driver *drv) |
| 280 | { |
| 281 | int err = 0; |
| 282 | |
| 283 | drv->driver.name = drv->name; |
| 284 | drv->driver.bus = &ibmebus_bus_type; |
| 285 | drv->driver.probe = ibmebus_bus_probe; |
| 286 | drv->driver.remove = ibmebus_bus_remove; |
| 287 | |
| 288 | if ((err = driver_register(&drv->driver) != 0)) |
| 289 | return err; |
| 290 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 291 | /* remove all supported devices first, in case someone |
| 292 | * probed them manually before registering the driver */ |
| 293 | ibmebus_remove_devices_by_id(drv->id_table); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 294 | ibmebus_add_devices_by_id(drv->id_table); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 295 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 296 | return 0; |
| 297 | } |
| 298 | EXPORT_SYMBOL(ibmebus_register_driver); |
| 299 | |
| 300 | void ibmebus_unregister_driver(struct ibmebus_driver *drv) |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 301 | { |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 302 | driver_unregister(&drv->driver); |
| 303 | ibmebus_remove_devices_by_id(drv->id_table); |
| 304 | } |
| 305 | EXPORT_SYMBOL(ibmebus_unregister_driver); |
| 306 | |
| 307 | int ibmebus_request_irq(struct ibmebus_dev *dev, |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 308 | u32 ist, |
David Howells | 40220c1 | 2006-10-09 12:19:47 +0100 | [diff] [blame] | 309 | irq_handler_t handler, |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 310 | unsigned long irq_flags, const char * devname, |
| 311 | void *dev_id) |
| 312 | { |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 313 | unsigned int irq = irq_create_mapping(NULL, ist); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 314 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 315 | if (irq == NO_IRQ) |
| 316 | return -EINVAL; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 317 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 318 | return request_irq(irq, handler, |
| 319 | irq_flags, devname, dev_id); |
| 320 | } |
| 321 | EXPORT_SYMBOL(ibmebus_request_irq); |
| 322 | |
| 323 | void ibmebus_free_irq(struct ibmebus_dev *dev, u32 ist, void *dev_id) |
| 324 | { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 325 | unsigned int irq = irq_find_mapping(NULL, ist); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 326 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 327 | free_irq(irq, dev_id); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 328 | } |
| 329 | EXPORT_SYMBOL(ibmebus_free_irq); |
| 330 | |
| 331 | static int ibmebus_bus_match(struct device *dev, struct device_driver *drv) |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 332 | { |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 333 | const struct ibmebus_dev *ebus_dev = to_ibmebus_dev(dev); |
| 334 | struct ibmebus_driver *ebus_drv = to_ibmebus_driver(drv); |
| 335 | const struct of_device_id *ids = ebus_drv->id_table; |
| 336 | const struct of_device_id *found_id; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 337 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 338 | if (!ids) |
| 339 | return 0; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 340 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 341 | found_id = of_match_device(ids, &ebus_dev->ofdev); |
| 342 | if (found_id) |
| 343 | return 1; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 344 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 345 | return 0; |
| 346 | } |
| 347 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 348 | static ssize_t name_show(struct device *dev, |
| 349 | struct device_attribute *attr, char *buf) |
| 350 | { |
| 351 | struct ibmebus_dev *ebus_dev = to_ibmebus_dev(dev); |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 352 | const char *name = of_get_property(ebus_dev->ofdev.node, "name", NULL); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 353 | return sprintf(buf, "%s\n", name); |
| 354 | } |
| 355 | |
| 356 | static struct device_attribute ibmebus_dev_attrs[] = { |
| 357 | __ATTR_RO(name), |
| 358 | __ATTR_NULL |
| 359 | }; |
| 360 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 361 | static int ibmebus_match_path(struct device *dev, void *data) |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 362 | { |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 363 | int rc; |
| 364 | struct device_node *dn = |
| 365 | of_node_get(to_ibmebus_dev(dev)->ofdev.node); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 366 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 367 | rc = (dn->full_name && (strcasecmp((char*)data, dn->full_name) == 0)); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 368 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 369 | of_node_put(dn); |
| 370 | return rc; |
| 371 | } |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 372 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 373 | static char *ibmebus_chomp(const char *in, size_t count) |
| 374 | { |
Jesper Juhl | 61a564f | 2007-08-24 09:45:08 +1000 | [diff] [blame] | 375 | char *out = kmalloc(count + 1, GFP_KERNEL); |
| 376 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 377 | if (!out) |
| 378 | return NULL; |
| 379 | |
| 380 | memcpy(out, in, count); |
| 381 | out[count] = '\0'; |
| 382 | if (out[count - 1] == '\n') |
| 383 | out[count - 1] = '\0'; |
| 384 | |
| 385 | return out; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | static ssize_t ibmebus_store_probe(struct bus_type *bus, |
| 389 | const char *buf, size_t count) |
| 390 | { |
| 391 | struct device_node *dn = NULL; |
| 392 | struct ibmebus_dev *dev; |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 393 | char *path; |
| 394 | ssize_t rc; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 395 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 396 | path = ibmebus_chomp(buf, count); |
| 397 | if (!path) |
| 398 | return -ENOMEM; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 399 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 400 | if (bus_find_device(&ibmebus_bus_type, NULL, path, |
Joachim Fenkes | 74c9b99 | 2007-09-26 19:46:34 +1000 | [diff] [blame] | 401 | ibmebus_match_path)) { |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 402 | printk(KERN_WARNING "%s: %s has already been probed\n", |
| 403 | __FUNCTION__, path); |
Joachim Fenkes | 74c9b99 | 2007-09-26 19:46:34 +1000 | [diff] [blame] | 404 | rc = -EEXIST; |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 405 | goto out; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 406 | } |
| 407 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 408 | if ((dn = of_find_node_by_path(path))) { |
| 409 | dev = ibmebus_register_device_node(dn); |
| 410 | of_node_put(dn); |
| 411 | rc = IS_ERR(dev) ? PTR_ERR(dev) : count; |
| 412 | } else { |
| 413 | printk(KERN_WARNING "%s: no such device node: %s\n", |
| 414 | __FUNCTION__, path); |
| 415 | rc = -ENODEV; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 416 | } |
| 417 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 418 | out: |
| 419 | kfree(path); |
| 420 | return rc; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | static ssize_t ibmebus_store_remove(struct bus_type *bus, |
| 424 | const char *buf, size_t count) |
| 425 | { |
| 426 | struct device *dev; |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 427 | char *path; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 428 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 429 | path = ibmebus_chomp(buf, count); |
| 430 | if (!path) |
| 431 | return -ENOMEM; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 432 | |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 433 | if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path, |
| 434 | ibmebus_match_path))) { |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 435 | ibmebus_unregister_device(dev); |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 436 | |
| 437 | kfree(path); |
| 438 | return count; |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 439 | } else { |
Joachim Fenkes | 0727702 | 2007-03-22 17:00:46 +0100 | [diff] [blame] | 440 | printk(KERN_WARNING "%s: %s not on the bus\n", |
| 441 | __FUNCTION__, path); |
| 442 | |
| 443 | kfree(path); |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 444 | return -ENODEV; |
| 445 | } |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | static struct bus_attribute ibmebus_bus_attrs[] = { |
| 449 | __ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe), |
| 450 | __ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove), |
| 451 | __ATTR_NULL |
| 452 | }; |
| 453 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 454 | struct bus_type ibmebus_bus_type = { |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 455 | .name = "ibmebus", |
| 456 | .match = ibmebus_bus_match, |
| 457 | .dev_attrs = ibmebus_dev_attrs, |
| 458 | .bus_attrs = ibmebus_bus_attrs |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 459 | }; |
| 460 | EXPORT_SYMBOL(ibmebus_bus_type); |
| 461 | |
| 462 | static int __init ibmebus_bus_init(void) |
| 463 | { |
| 464 | int err; |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 465 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 466 | printk(KERN_INFO "IBM eBus Device Driver\n"); |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 467 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 468 | err = bus_register(&ibmebus_bus_type); |
| 469 | if (err) { |
| 470 | printk(KERN_ERR ":%s: failed to register IBM eBus.\n", |
| 471 | __FUNCTION__); |
| 472 | return err; |
| 473 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 474 | |
Joachim Fenkes | 6bccf75 | 2007-03-09 19:00:32 +0100 | [diff] [blame] | 475 | err = device_register(&ibmebus_bus_device); |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 476 | if (err) { |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 477 | printk(KERN_WARNING "%s: device_register returned %i\n", |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 478 | __FUNCTION__, err); |
| 479 | bus_unregister(&ibmebus_bus_type); |
| 480 | |
| 481 | return err; |
| 482 | } |
Joachim Fenkes | a830880 | 2007-03-09 18:56:46 +0100 | [diff] [blame] | 483 | |
Heiko J Schick | d7a3010 | 2005-11-16 08:56:43 +0100 | [diff] [blame] | 484 | return 0; |
| 485 | } |
| 486 | __initcall(ibmebus_bus_init); |