Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1 | /* |
| 2 | * VME Bridge Framework |
| 3 | * |
| 4 | * Author: Martyn Welch <martyn.welch@gefanuc.com> |
| 5 | * Copyright 2008 GE Fanuc Intelligent Platforms Embedded Systems, Inc. |
| 6 | * |
| 7 | * Based on work by Tom Armistead and Ajit Prem |
| 8 | * Copyright 2004 Motorola Inc. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your |
| 13 | * option) any later version. |
| 14 | */ |
| 15 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/moduleparam.h> |
| 18 | #include <linux/mm.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/pci.h> |
| 23 | #include <linux/poll.h> |
| 24 | #include <linux/highmem.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/pagemap.h> |
| 27 | #include <linux/device.h> |
| 28 | #include <linux/dma-mapping.h> |
| 29 | #include <linux/syscalls.h> |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 30 | #include <linux/mutex.h> |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
| 32 | |
| 33 | #include "vme.h" |
| 34 | #include "vme_bridge.h" |
| 35 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 36 | /* Bitmask and mutex to keep track of bridge numbers */ |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 37 | static unsigned int vme_bus_numbers; |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 38 | DEFINE_MUTEX(vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 39 | |
| 40 | static void __exit vme_exit (void); |
| 41 | static int __init vme_init (void); |
| 42 | |
| 43 | |
| 44 | /* |
| 45 | * Find the bridge resource associated with a specific device resource |
| 46 | */ |
| 47 | static struct vme_bridge *dev_to_bridge(struct device *dev) |
| 48 | { |
| 49 | return dev->platform_data; |
| 50 | } |
| 51 | |
| 52 | /* |
| 53 | * Find the bridge that the resource is associated with. |
| 54 | */ |
| 55 | static struct vme_bridge *find_bridge(struct vme_resource *resource) |
| 56 | { |
| 57 | /* Get list to search */ |
| 58 | switch (resource->type) { |
| 59 | case VME_MASTER: |
| 60 | return list_entry(resource->entry, struct vme_master_resource, |
| 61 | list)->parent; |
| 62 | break; |
| 63 | case VME_SLAVE: |
| 64 | return list_entry(resource->entry, struct vme_slave_resource, |
| 65 | list)->parent; |
| 66 | break; |
| 67 | case VME_DMA: |
| 68 | return list_entry(resource->entry, struct vme_dma_resource, |
| 69 | list)->parent; |
| 70 | break; |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 71 | case VME_LM: |
| 72 | return list_entry(resource->entry, struct vme_lm_resource, |
| 73 | list)->parent; |
| 74 | break; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 75 | default: |
| 76 | printk(KERN_ERR "Unknown resource type\n"); |
| 77 | return NULL; |
| 78 | break; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Allocate a contiguous block of memory for use by the driver. This is used to |
| 84 | * create the buffers for the slave windows. |
| 85 | * |
| 86 | * XXX VME bridges could be available on buses other than PCI. At the momment |
| 87 | * this framework only supports PCI devices. |
| 88 | */ |
| 89 | void * vme_alloc_consistent(struct vme_resource *resource, size_t size, |
| 90 | dma_addr_t *dma) |
| 91 | { |
| 92 | struct vme_bridge *bridge; |
| 93 | struct pci_dev *pdev; |
| 94 | |
| 95 | if(resource == NULL) { |
| 96 | printk("No resource\n"); |
| 97 | return NULL; |
| 98 | } |
| 99 | |
| 100 | bridge = find_bridge(resource); |
| 101 | if(bridge == NULL) { |
| 102 | printk("Can't find bridge\n"); |
| 103 | return NULL; |
| 104 | } |
| 105 | |
| 106 | /* Find pci_dev container of dev */ |
| 107 | if (bridge->parent == NULL) { |
| 108 | printk("Dev entry NULL\n"); |
| 109 | return NULL; |
| 110 | } |
| 111 | pdev = container_of(bridge->parent, struct pci_dev, dev); |
| 112 | |
| 113 | return pci_alloc_consistent(pdev, size, dma); |
| 114 | } |
| 115 | EXPORT_SYMBOL(vme_alloc_consistent); |
| 116 | |
| 117 | /* |
| 118 | * Free previously allocated contiguous block of memory. |
| 119 | * |
| 120 | * XXX VME bridges could be available on buses other than PCI. At the momment |
| 121 | * this framework only supports PCI devices. |
| 122 | */ |
| 123 | void vme_free_consistent(struct vme_resource *resource, size_t size, |
| 124 | void *vaddr, dma_addr_t dma) |
| 125 | { |
| 126 | struct vme_bridge *bridge; |
| 127 | struct pci_dev *pdev; |
| 128 | |
| 129 | if(resource == NULL) { |
| 130 | printk("No resource\n"); |
| 131 | return; |
| 132 | } |
| 133 | |
| 134 | bridge = find_bridge(resource); |
| 135 | if(bridge == NULL) { |
| 136 | printk("Can't find bridge\n"); |
| 137 | return; |
| 138 | } |
| 139 | |
| 140 | /* Find pci_dev container of dev */ |
| 141 | pdev = container_of(bridge->parent, struct pci_dev, dev); |
| 142 | |
| 143 | pci_free_consistent(pdev, size, vaddr, dma); |
| 144 | } |
| 145 | EXPORT_SYMBOL(vme_free_consistent); |
| 146 | |
| 147 | size_t vme_get_size(struct vme_resource *resource) |
| 148 | { |
| 149 | int enabled, retval; |
| 150 | unsigned long long base, size; |
| 151 | dma_addr_t buf_base; |
| 152 | vme_address_t aspace; |
| 153 | vme_cycle_t cycle; |
| 154 | vme_width_t dwidth; |
| 155 | |
| 156 | switch (resource->type) { |
| 157 | case VME_MASTER: |
| 158 | retval = vme_master_get(resource, &enabled, &base, &size, |
| 159 | &aspace, &cycle, &dwidth); |
| 160 | |
| 161 | return size; |
| 162 | break; |
| 163 | case VME_SLAVE: |
| 164 | retval = vme_slave_get(resource, &enabled, &base, &size, |
| 165 | &buf_base, &aspace, &cycle); |
| 166 | |
| 167 | return size; |
| 168 | break; |
| 169 | case VME_DMA: |
| 170 | return 0; |
| 171 | break; |
| 172 | default: |
| 173 | printk(KERN_ERR "Unknown resource type\n"); |
| 174 | return 0; |
| 175 | break; |
| 176 | } |
| 177 | } |
| 178 | EXPORT_SYMBOL(vme_get_size); |
| 179 | |
| 180 | static int vme_check_window(vme_address_t aspace, unsigned long long vme_base, |
| 181 | unsigned long long size) |
| 182 | { |
| 183 | int retval = 0; |
| 184 | |
| 185 | switch (aspace) { |
| 186 | case VME_A16: |
| 187 | if (((vme_base + size) > VME_A16_MAX) || |
| 188 | (vme_base > VME_A16_MAX)) |
| 189 | retval = -EFAULT; |
| 190 | break; |
| 191 | case VME_A24: |
| 192 | if (((vme_base + size) > VME_A24_MAX) || |
| 193 | (vme_base > VME_A24_MAX)) |
| 194 | retval = -EFAULT; |
| 195 | break; |
| 196 | case VME_A32: |
| 197 | if (((vme_base + size) > VME_A32_MAX) || |
| 198 | (vme_base > VME_A32_MAX)) |
| 199 | retval = -EFAULT; |
| 200 | break; |
| 201 | case VME_A64: |
| 202 | /* |
| 203 | * Any value held in an unsigned long long can be used as the |
| 204 | * base |
| 205 | */ |
| 206 | break; |
| 207 | case VME_CRCSR: |
| 208 | if (((vme_base + size) > VME_CRCSR_MAX) || |
| 209 | (vme_base > VME_CRCSR_MAX)) |
| 210 | retval = -EFAULT; |
| 211 | break; |
| 212 | case VME_USER1: |
| 213 | case VME_USER2: |
| 214 | case VME_USER3: |
| 215 | case VME_USER4: |
| 216 | /* User Defined */ |
| 217 | break; |
| 218 | default: |
| 219 | printk("Invalid address space\n"); |
| 220 | retval = -EINVAL; |
| 221 | break; |
| 222 | } |
| 223 | |
| 224 | return retval; |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | * Request a slave image with specific attributes, return some unique |
| 229 | * identifier. |
| 230 | */ |
| 231 | struct vme_resource * vme_slave_request(struct device *dev, |
| 232 | vme_address_t address, vme_cycle_t cycle) |
| 233 | { |
| 234 | struct vme_bridge *bridge; |
| 235 | struct list_head *slave_pos = NULL; |
| 236 | struct vme_slave_resource *allocated_image = NULL; |
| 237 | struct vme_slave_resource *slave_image = NULL; |
| 238 | struct vme_resource *resource = NULL; |
| 239 | |
| 240 | bridge = dev_to_bridge(dev); |
| 241 | if (bridge == NULL) { |
| 242 | printk(KERN_ERR "Can't find VME bus\n"); |
| 243 | goto err_bus; |
| 244 | } |
| 245 | |
| 246 | /* Loop through slave resources */ |
| 247 | list_for_each(slave_pos, &(bridge->slave_resources)) { |
| 248 | slave_image = list_entry(slave_pos, |
| 249 | struct vme_slave_resource, list); |
| 250 | |
| 251 | if (slave_image == NULL) { |
| 252 | printk("Registered NULL Slave resource\n"); |
| 253 | continue; |
| 254 | } |
| 255 | |
| 256 | /* Find an unlocked and compatible image */ |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 257 | mutex_lock(&(slave_image->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 258 | if(((slave_image->address_attr & address) == address) && |
| 259 | ((slave_image->cycle_attr & cycle) == cycle) && |
| 260 | (slave_image->locked == 0)) { |
| 261 | |
| 262 | slave_image->locked = 1; |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 263 | mutex_unlock(&(slave_image->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 264 | allocated_image = slave_image; |
| 265 | break; |
| 266 | } |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 267 | mutex_unlock(&(slave_image->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | /* No free image */ |
| 271 | if (allocated_image == NULL) |
| 272 | goto err_image; |
| 273 | |
| 274 | resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL); |
| 275 | if (resource == NULL) { |
| 276 | printk(KERN_WARNING "Unable to allocate resource structure\n"); |
| 277 | goto err_alloc; |
| 278 | } |
| 279 | resource->type = VME_SLAVE; |
| 280 | resource->entry = &(allocated_image->list); |
| 281 | |
| 282 | return resource; |
| 283 | |
| 284 | err_alloc: |
| 285 | /* Unlock image */ |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 286 | mutex_lock(&(slave_image->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 287 | slave_image->locked = 0; |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 288 | mutex_unlock(&(slave_image->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 289 | err_image: |
| 290 | err_bus: |
| 291 | return NULL; |
| 292 | } |
| 293 | EXPORT_SYMBOL(vme_slave_request); |
| 294 | |
| 295 | int vme_slave_set (struct vme_resource *resource, int enabled, |
| 296 | unsigned long long vme_base, unsigned long long size, |
| 297 | dma_addr_t buf_base, vme_address_t aspace, vme_cycle_t cycle) |
| 298 | { |
| 299 | struct vme_bridge *bridge = find_bridge(resource); |
| 300 | struct vme_slave_resource *image; |
| 301 | int retval; |
| 302 | |
| 303 | if (resource->type != VME_SLAVE) { |
| 304 | printk("Not a slave resource\n"); |
| 305 | return -EINVAL; |
| 306 | } |
| 307 | |
| 308 | image = list_entry(resource->entry, struct vme_slave_resource, list); |
| 309 | |
| 310 | if (bridge->slave_set == NULL) { |
| 311 | printk("Function not supported\n"); |
| 312 | return -ENOSYS; |
| 313 | } |
| 314 | |
| 315 | if(!(((image->address_attr & aspace) == aspace) && |
| 316 | ((image->cycle_attr & cycle) == cycle))) { |
| 317 | printk("Invalid attributes\n"); |
| 318 | return -EINVAL; |
| 319 | } |
| 320 | |
| 321 | retval = vme_check_window(aspace, vme_base, size); |
| 322 | if(retval) |
| 323 | return retval; |
| 324 | |
| 325 | return bridge->slave_set(image, enabled, vme_base, size, buf_base, |
| 326 | aspace, cycle); |
| 327 | } |
| 328 | EXPORT_SYMBOL(vme_slave_set); |
| 329 | |
| 330 | int vme_slave_get (struct vme_resource *resource, int *enabled, |
| 331 | unsigned long long *vme_base, unsigned long long *size, |
| 332 | dma_addr_t *buf_base, vme_address_t *aspace, vme_cycle_t *cycle) |
| 333 | { |
| 334 | struct vme_bridge *bridge = find_bridge(resource); |
| 335 | struct vme_slave_resource *image; |
| 336 | |
| 337 | if (resource->type != VME_SLAVE) { |
| 338 | printk("Not a slave resource\n"); |
| 339 | return -EINVAL; |
| 340 | } |
| 341 | |
| 342 | image = list_entry(resource->entry, struct vme_slave_resource, list); |
| 343 | |
Emilio G. Cota | 51a569f | 2009-08-10 16:52:42 +0200 | [diff] [blame] | 344 | if (bridge->slave_get == NULL) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 345 | printk("vme_slave_get not supported\n"); |
| 346 | return -EINVAL; |
| 347 | } |
| 348 | |
| 349 | return bridge->slave_get(image, enabled, vme_base, size, buf_base, |
| 350 | aspace, cycle); |
| 351 | } |
| 352 | EXPORT_SYMBOL(vme_slave_get); |
| 353 | |
| 354 | void vme_slave_free(struct vme_resource *resource) |
| 355 | { |
| 356 | struct vme_slave_resource *slave_image; |
| 357 | |
| 358 | if (resource->type != VME_SLAVE) { |
| 359 | printk("Not a slave resource\n"); |
| 360 | return; |
| 361 | } |
| 362 | |
| 363 | slave_image = list_entry(resource->entry, struct vme_slave_resource, |
| 364 | list); |
| 365 | if (slave_image == NULL) { |
| 366 | printk("Can't find slave resource\n"); |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | /* Unlock image */ |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 371 | mutex_lock(&(slave_image->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 372 | if (slave_image->locked == 0) |
| 373 | printk(KERN_ERR "Image is already free\n"); |
| 374 | |
| 375 | slave_image->locked = 0; |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 376 | mutex_unlock(&(slave_image->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 377 | |
| 378 | /* Free up resource memory */ |
| 379 | kfree(resource); |
| 380 | } |
| 381 | EXPORT_SYMBOL(vme_slave_free); |
| 382 | |
| 383 | /* |
| 384 | * Request a master image with specific attributes, return some unique |
| 385 | * identifier. |
| 386 | */ |
| 387 | struct vme_resource * vme_master_request(struct device *dev, |
| 388 | vme_address_t address, vme_cycle_t cycle, vme_width_t dwidth) |
| 389 | { |
| 390 | struct vme_bridge *bridge; |
| 391 | struct list_head *master_pos = NULL; |
| 392 | struct vme_master_resource *allocated_image = NULL; |
| 393 | struct vme_master_resource *master_image = NULL; |
| 394 | struct vme_resource *resource = NULL; |
| 395 | |
| 396 | bridge = dev_to_bridge(dev); |
| 397 | if (bridge == NULL) { |
| 398 | printk(KERN_ERR "Can't find VME bus\n"); |
| 399 | goto err_bus; |
| 400 | } |
| 401 | |
| 402 | /* Loop through master resources */ |
| 403 | list_for_each(master_pos, &(bridge->master_resources)) { |
| 404 | master_image = list_entry(master_pos, |
| 405 | struct vme_master_resource, list); |
| 406 | |
| 407 | if (master_image == NULL) { |
| 408 | printk(KERN_WARNING "Registered NULL master resource\n"); |
| 409 | continue; |
| 410 | } |
| 411 | |
| 412 | /* Find an unlocked and compatible image */ |
| 413 | spin_lock(&(master_image->lock)); |
| 414 | if(((master_image->address_attr & address) == address) && |
| 415 | ((master_image->cycle_attr & cycle) == cycle) && |
| 416 | ((master_image->width_attr & dwidth) == dwidth) && |
| 417 | (master_image->locked == 0)) { |
| 418 | |
| 419 | master_image->locked = 1; |
| 420 | spin_unlock(&(master_image->lock)); |
| 421 | allocated_image = master_image; |
| 422 | break; |
| 423 | } |
| 424 | spin_unlock(&(master_image->lock)); |
| 425 | } |
| 426 | |
| 427 | /* Check to see if we found a resource */ |
| 428 | if (allocated_image == NULL) { |
| 429 | printk(KERN_ERR "Can't find a suitable resource\n"); |
| 430 | goto err_image; |
| 431 | } |
| 432 | |
| 433 | resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL); |
| 434 | if (resource == NULL) { |
| 435 | printk(KERN_ERR "Unable to allocate resource structure\n"); |
| 436 | goto err_alloc; |
| 437 | } |
| 438 | resource->type = VME_MASTER; |
| 439 | resource->entry = &(allocated_image->list); |
| 440 | |
| 441 | return resource; |
| 442 | |
| 443 | kfree(resource); |
| 444 | err_alloc: |
| 445 | /* Unlock image */ |
| 446 | spin_lock(&(master_image->lock)); |
| 447 | master_image->locked = 0; |
| 448 | spin_unlock(&(master_image->lock)); |
| 449 | err_image: |
| 450 | err_bus: |
| 451 | return NULL; |
| 452 | } |
| 453 | EXPORT_SYMBOL(vme_master_request); |
| 454 | |
| 455 | int vme_master_set (struct vme_resource *resource, int enabled, |
| 456 | unsigned long long vme_base, unsigned long long size, |
| 457 | vme_address_t aspace, vme_cycle_t cycle, vme_width_t dwidth) |
| 458 | { |
| 459 | struct vme_bridge *bridge = find_bridge(resource); |
| 460 | struct vme_master_resource *image; |
| 461 | int retval; |
| 462 | |
| 463 | if (resource->type != VME_MASTER) { |
| 464 | printk("Not a master resource\n"); |
| 465 | return -EINVAL; |
| 466 | } |
| 467 | |
| 468 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 469 | |
| 470 | if (bridge->master_set == NULL) { |
| 471 | printk("vme_master_set not supported\n"); |
| 472 | return -EINVAL; |
| 473 | } |
| 474 | |
| 475 | if(!(((image->address_attr & aspace) == aspace) && |
| 476 | ((image->cycle_attr & cycle) == cycle) && |
| 477 | ((image->width_attr & dwidth) == dwidth))) { |
| 478 | printk("Invalid attributes\n"); |
| 479 | return -EINVAL; |
| 480 | } |
| 481 | |
| 482 | retval = vme_check_window(aspace, vme_base, size); |
| 483 | if(retval) |
| 484 | return retval; |
| 485 | |
| 486 | return bridge->master_set(image, enabled, vme_base, size, aspace, |
| 487 | cycle, dwidth); |
| 488 | } |
| 489 | EXPORT_SYMBOL(vme_master_set); |
| 490 | |
| 491 | int vme_master_get (struct vme_resource *resource, int *enabled, |
| 492 | unsigned long long *vme_base, unsigned long long *size, |
| 493 | vme_address_t *aspace, vme_cycle_t *cycle, vme_width_t *dwidth) |
| 494 | { |
| 495 | struct vme_bridge *bridge = find_bridge(resource); |
| 496 | struct vme_master_resource *image; |
| 497 | |
| 498 | if (resource->type != VME_MASTER) { |
| 499 | printk("Not a master resource\n"); |
| 500 | return -EINVAL; |
| 501 | } |
| 502 | |
| 503 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 504 | |
Emilio G. Cota | 51a569f | 2009-08-10 16:52:42 +0200 | [diff] [blame] | 505 | if (bridge->master_get == NULL) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 506 | printk("vme_master_set not supported\n"); |
| 507 | return -EINVAL; |
| 508 | } |
| 509 | |
| 510 | return bridge->master_get(image, enabled, vme_base, size, aspace, |
| 511 | cycle, dwidth); |
| 512 | } |
| 513 | EXPORT_SYMBOL(vme_master_get); |
| 514 | |
| 515 | /* |
| 516 | * Read data out of VME space into a buffer. |
| 517 | */ |
| 518 | ssize_t vme_master_read (struct vme_resource *resource, void *buf, size_t count, |
| 519 | loff_t offset) |
| 520 | { |
| 521 | struct vme_bridge *bridge = find_bridge(resource); |
| 522 | struct vme_master_resource *image; |
| 523 | size_t length; |
| 524 | |
| 525 | if (bridge->master_read == NULL) { |
| 526 | printk("Reading from resource not supported\n"); |
| 527 | return -EINVAL; |
| 528 | } |
| 529 | |
| 530 | if (resource->type != VME_MASTER) { |
| 531 | printk("Not a master resource\n"); |
| 532 | return -EINVAL; |
| 533 | } |
| 534 | |
| 535 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 536 | |
| 537 | length = vme_get_size(resource); |
| 538 | |
| 539 | if (offset > length) { |
| 540 | printk("Invalid Offset\n"); |
| 541 | return -EFAULT; |
| 542 | } |
| 543 | |
| 544 | if ((offset + count) > length) |
| 545 | count = length - offset; |
| 546 | |
| 547 | return bridge->master_read(image, buf, count, offset); |
| 548 | |
| 549 | } |
| 550 | EXPORT_SYMBOL(vme_master_read); |
| 551 | |
| 552 | /* |
| 553 | * Write data out to VME space from a buffer. |
| 554 | */ |
| 555 | ssize_t vme_master_write (struct vme_resource *resource, void *buf, |
| 556 | size_t count, loff_t offset) |
| 557 | { |
| 558 | struct vme_bridge *bridge = find_bridge(resource); |
| 559 | struct vme_master_resource *image; |
| 560 | size_t length; |
| 561 | |
| 562 | if (bridge->master_write == NULL) { |
| 563 | printk("Writing to resource not supported\n"); |
| 564 | return -EINVAL; |
| 565 | } |
| 566 | |
| 567 | if (resource->type != VME_MASTER) { |
| 568 | printk("Not a master resource\n"); |
| 569 | return -EINVAL; |
| 570 | } |
| 571 | |
| 572 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 573 | |
| 574 | length = vme_get_size(resource); |
| 575 | |
| 576 | if (offset > length) { |
| 577 | printk("Invalid Offset\n"); |
| 578 | return -EFAULT; |
| 579 | } |
| 580 | |
| 581 | if ((offset + count) > length) |
| 582 | count = length - offset; |
| 583 | |
| 584 | return bridge->master_write(image, buf, count, offset); |
| 585 | } |
| 586 | EXPORT_SYMBOL(vme_master_write); |
| 587 | |
| 588 | /* |
| 589 | * Perform RMW cycle to provided location. |
| 590 | */ |
| 591 | unsigned int vme_master_rmw (struct vme_resource *resource, unsigned int mask, |
| 592 | unsigned int compare, unsigned int swap, loff_t offset) |
| 593 | { |
| 594 | struct vme_bridge *bridge = find_bridge(resource); |
| 595 | struct vme_master_resource *image; |
| 596 | |
| 597 | if (bridge->master_rmw == NULL) { |
| 598 | printk("Writing to resource not supported\n"); |
| 599 | return -EINVAL; |
| 600 | } |
| 601 | |
| 602 | if (resource->type != VME_MASTER) { |
| 603 | printk("Not a master resource\n"); |
| 604 | return -EINVAL; |
| 605 | } |
| 606 | |
| 607 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 608 | |
| 609 | return bridge->master_rmw(image, mask, compare, swap, offset); |
| 610 | } |
| 611 | EXPORT_SYMBOL(vme_master_rmw); |
| 612 | |
| 613 | void vme_master_free(struct vme_resource *resource) |
| 614 | { |
| 615 | struct vme_master_resource *master_image; |
| 616 | |
| 617 | if (resource->type != VME_MASTER) { |
| 618 | printk("Not a master resource\n"); |
| 619 | return; |
| 620 | } |
| 621 | |
| 622 | master_image = list_entry(resource->entry, struct vme_master_resource, |
| 623 | list); |
| 624 | if (master_image == NULL) { |
| 625 | printk("Can't find master resource\n"); |
| 626 | return; |
| 627 | } |
| 628 | |
| 629 | /* Unlock image */ |
| 630 | spin_lock(&(master_image->lock)); |
| 631 | if (master_image->locked == 0) |
| 632 | printk(KERN_ERR "Image is already free\n"); |
| 633 | |
| 634 | master_image->locked = 0; |
| 635 | spin_unlock(&(master_image->lock)); |
| 636 | |
| 637 | /* Free up resource memory */ |
| 638 | kfree(resource); |
| 639 | } |
| 640 | EXPORT_SYMBOL(vme_master_free); |
| 641 | |
| 642 | /* |
| 643 | * Request a DMA controller with specific attributes, return some unique |
| 644 | * identifier. |
| 645 | */ |
| 646 | struct vme_resource *vme_request_dma(struct device *dev) |
| 647 | { |
| 648 | struct vme_bridge *bridge; |
| 649 | struct list_head *dma_pos = NULL; |
| 650 | struct vme_dma_resource *allocated_ctrlr = NULL; |
| 651 | struct vme_dma_resource *dma_ctrlr = NULL; |
| 652 | struct vme_resource *resource = NULL; |
| 653 | |
| 654 | /* XXX Not checking resource attributes */ |
| 655 | printk(KERN_ERR "No VME resource Attribute tests done\n"); |
| 656 | |
| 657 | bridge = dev_to_bridge(dev); |
| 658 | if (bridge == NULL) { |
| 659 | printk(KERN_ERR "Can't find VME bus\n"); |
| 660 | goto err_bus; |
| 661 | } |
| 662 | |
| 663 | /* Loop through DMA resources */ |
| 664 | list_for_each(dma_pos, &(bridge->dma_resources)) { |
| 665 | dma_ctrlr = list_entry(dma_pos, |
| 666 | struct vme_dma_resource, list); |
| 667 | |
| 668 | if (dma_ctrlr == NULL) { |
| 669 | printk("Registered NULL DMA resource\n"); |
| 670 | continue; |
| 671 | } |
| 672 | |
| 673 | /* Find an unlocked controller */ |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 674 | mutex_lock(&(dma_ctrlr->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 675 | if(dma_ctrlr->locked == 0) { |
| 676 | dma_ctrlr->locked = 1; |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 677 | mutex_unlock(&(dma_ctrlr->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 678 | allocated_ctrlr = dma_ctrlr; |
| 679 | break; |
| 680 | } |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 681 | mutex_unlock(&(dma_ctrlr->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | /* Check to see if we found a resource */ |
| 685 | if (allocated_ctrlr == NULL) |
| 686 | goto err_ctrlr; |
| 687 | |
| 688 | resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL); |
| 689 | if (resource == NULL) { |
| 690 | printk(KERN_WARNING "Unable to allocate resource structure\n"); |
| 691 | goto err_alloc; |
| 692 | } |
| 693 | resource->type = VME_DMA; |
| 694 | resource->entry = &(allocated_ctrlr->list); |
| 695 | |
| 696 | return resource; |
| 697 | |
| 698 | err_alloc: |
| 699 | /* Unlock image */ |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 700 | mutex_lock(&(dma_ctrlr->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 701 | dma_ctrlr->locked = 0; |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 702 | mutex_unlock(&(dma_ctrlr->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 703 | err_ctrlr: |
| 704 | err_bus: |
| 705 | return NULL; |
| 706 | } |
| 707 | EXPORT_SYMBOL(vme_request_dma); |
| 708 | |
| 709 | /* |
| 710 | * Start new list |
| 711 | */ |
| 712 | struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource) |
| 713 | { |
| 714 | struct vme_dma_resource *ctrlr; |
| 715 | struct vme_dma_list *dma_list; |
| 716 | |
| 717 | if (resource->type != VME_DMA) { |
| 718 | printk("Not a DMA resource\n"); |
| 719 | return NULL; |
| 720 | } |
| 721 | |
| 722 | ctrlr = list_entry(resource->entry, struct vme_dma_resource, list); |
| 723 | |
| 724 | dma_list = (struct vme_dma_list *)kmalloc( |
| 725 | sizeof(struct vme_dma_list), GFP_KERNEL); |
| 726 | if(dma_list == NULL) { |
| 727 | printk("Unable to allocate memory for new dma list\n"); |
| 728 | return NULL; |
| 729 | } |
| 730 | INIT_LIST_HEAD(&(dma_list->entries)); |
| 731 | dma_list->parent = ctrlr; |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 732 | mutex_init(&(dma_list->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 733 | |
| 734 | return dma_list; |
| 735 | } |
| 736 | EXPORT_SYMBOL(vme_new_dma_list); |
| 737 | |
| 738 | /* |
| 739 | * Create "Pattern" type attributes |
| 740 | */ |
| 741 | struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern, |
| 742 | vme_pattern_t type) |
| 743 | { |
| 744 | struct vme_dma_attr *attributes; |
| 745 | struct vme_dma_pattern *pattern_attr; |
| 746 | |
| 747 | attributes = (struct vme_dma_attr *)kmalloc( |
| 748 | sizeof(struct vme_dma_attr), GFP_KERNEL); |
| 749 | if(attributes == NULL) { |
| 750 | printk("Unable to allocate memory for attributes structure\n"); |
| 751 | goto err_attr; |
| 752 | } |
| 753 | |
| 754 | pattern_attr = (struct vme_dma_pattern *)kmalloc( |
| 755 | sizeof(struct vme_dma_pattern), GFP_KERNEL); |
| 756 | if(pattern_attr == NULL) { |
| 757 | printk("Unable to allocate memory for pattern attributes\n"); |
| 758 | goto err_pat; |
| 759 | } |
| 760 | |
| 761 | attributes->type = VME_DMA_PATTERN; |
| 762 | attributes->private = (void *)pattern_attr; |
| 763 | |
| 764 | pattern_attr->pattern = pattern; |
| 765 | pattern_attr->type = type; |
| 766 | |
| 767 | return attributes; |
| 768 | |
| 769 | kfree(pattern_attr); |
| 770 | err_pat: |
| 771 | kfree(attributes); |
| 772 | err_attr: |
| 773 | return NULL; |
| 774 | } |
| 775 | EXPORT_SYMBOL(vme_dma_pattern_attribute); |
| 776 | |
| 777 | /* |
| 778 | * Create "PCI" type attributes |
| 779 | */ |
| 780 | struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t address) |
| 781 | { |
| 782 | struct vme_dma_attr *attributes; |
| 783 | struct vme_dma_pci *pci_attr; |
| 784 | |
| 785 | /* XXX Run some sanity checks here */ |
| 786 | |
| 787 | attributes = (struct vme_dma_attr *)kmalloc( |
| 788 | sizeof(struct vme_dma_attr), GFP_KERNEL); |
| 789 | if(attributes == NULL) { |
| 790 | printk("Unable to allocate memory for attributes structure\n"); |
| 791 | goto err_attr; |
| 792 | } |
| 793 | |
| 794 | pci_attr = (struct vme_dma_pci *)kmalloc(sizeof(struct vme_dma_pci), |
| 795 | GFP_KERNEL); |
| 796 | if(pci_attr == NULL) { |
| 797 | printk("Unable to allocate memory for pci attributes\n"); |
| 798 | goto err_pci; |
| 799 | } |
| 800 | |
| 801 | |
| 802 | |
| 803 | attributes->type = VME_DMA_PCI; |
| 804 | attributes->private = (void *)pci_attr; |
| 805 | |
| 806 | pci_attr->address = address; |
| 807 | |
| 808 | return attributes; |
| 809 | |
| 810 | kfree(pci_attr); |
| 811 | err_pci: |
| 812 | kfree(attributes); |
| 813 | err_attr: |
| 814 | return NULL; |
| 815 | } |
| 816 | EXPORT_SYMBOL(vme_dma_pci_attribute); |
| 817 | |
| 818 | /* |
| 819 | * Create "VME" type attributes |
| 820 | */ |
| 821 | struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address, |
| 822 | vme_address_t aspace, vme_cycle_t cycle, vme_width_t dwidth) |
| 823 | { |
| 824 | struct vme_dma_attr *attributes; |
| 825 | struct vme_dma_vme *vme_attr; |
| 826 | |
| 827 | /* XXX Run some sanity checks here */ |
| 828 | |
| 829 | attributes = (struct vme_dma_attr *)kmalloc( |
| 830 | sizeof(struct vme_dma_attr), GFP_KERNEL); |
| 831 | if(attributes == NULL) { |
| 832 | printk("Unable to allocate memory for attributes structure\n"); |
| 833 | goto err_attr; |
| 834 | } |
| 835 | |
| 836 | vme_attr = (struct vme_dma_vme *)kmalloc(sizeof(struct vme_dma_vme), |
| 837 | GFP_KERNEL); |
| 838 | if(vme_attr == NULL) { |
| 839 | printk("Unable to allocate memory for vme attributes\n"); |
| 840 | goto err_vme; |
| 841 | } |
| 842 | |
| 843 | attributes->type = VME_DMA_VME; |
| 844 | attributes->private = (void *)vme_attr; |
| 845 | |
| 846 | vme_attr->address = address; |
| 847 | vme_attr->aspace = aspace; |
| 848 | vme_attr->cycle = cycle; |
| 849 | vme_attr->dwidth = dwidth; |
| 850 | |
| 851 | return attributes; |
| 852 | |
| 853 | kfree(vme_attr); |
| 854 | err_vme: |
| 855 | kfree(attributes); |
| 856 | err_attr: |
| 857 | return NULL; |
| 858 | } |
| 859 | EXPORT_SYMBOL(vme_dma_vme_attribute); |
| 860 | |
| 861 | /* |
| 862 | * Free attribute |
| 863 | */ |
| 864 | void vme_dma_free_attribute(struct vme_dma_attr *attributes) |
| 865 | { |
| 866 | kfree(attributes->private); |
| 867 | kfree(attributes); |
| 868 | } |
| 869 | EXPORT_SYMBOL(vme_dma_free_attribute); |
| 870 | |
| 871 | int vme_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src, |
| 872 | struct vme_dma_attr *dest, size_t count) |
| 873 | { |
| 874 | struct vme_bridge *bridge = list->parent->parent; |
| 875 | int retval; |
| 876 | |
| 877 | if (bridge->dma_list_add == NULL) { |
| 878 | printk("Link List DMA generation not supported\n"); |
| 879 | return -EINVAL; |
| 880 | } |
| 881 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 882 | if (mutex_trylock(&(list->mtx))) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 883 | printk("Link List already submitted\n"); |
| 884 | return -EINVAL; |
| 885 | } |
| 886 | |
| 887 | retval = bridge->dma_list_add(list, src, dest, count); |
| 888 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 889 | mutex_unlock(&(list->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 890 | |
| 891 | return retval; |
| 892 | } |
| 893 | EXPORT_SYMBOL(vme_dma_list_add); |
| 894 | |
| 895 | int vme_dma_list_exec(struct vme_dma_list *list) |
| 896 | { |
| 897 | struct vme_bridge *bridge = list->parent->parent; |
| 898 | int retval; |
| 899 | |
| 900 | if (bridge->dma_list_exec == NULL) { |
| 901 | printk("Link List DMA execution not supported\n"); |
| 902 | return -EINVAL; |
| 903 | } |
| 904 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 905 | mutex_lock(&(list->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 906 | |
| 907 | retval = bridge->dma_list_exec(list); |
| 908 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 909 | mutex_unlock(&(list->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 910 | |
| 911 | return retval; |
| 912 | } |
| 913 | EXPORT_SYMBOL(vme_dma_list_exec); |
| 914 | |
| 915 | int vme_dma_list_free(struct vme_dma_list *list) |
| 916 | { |
| 917 | struct vme_bridge *bridge = list->parent->parent; |
| 918 | int retval; |
| 919 | |
| 920 | if (bridge->dma_list_empty == NULL) { |
| 921 | printk("Emptying of Link Lists not supported\n"); |
| 922 | return -EINVAL; |
| 923 | } |
| 924 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 925 | if (mutex_trylock(&(list->mtx))) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 926 | printk("Link List in use\n"); |
| 927 | return -EINVAL; |
| 928 | } |
| 929 | |
| 930 | /* |
| 931 | * Empty out all of the entries from the dma list. We need to go to the |
| 932 | * low level driver as dma entries are driver specific. |
| 933 | */ |
| 934 | retval = bridge->dma_list_empty(list); |
| 935 | if (retval) { |
| 936 | printk("Unable to empty link-list entries\n"); |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 937 | mutex_unlock(&(list->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 938 | return retval; |
| 939 | } |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 940 | mutex_unlock(&(list->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 941 | kfree(list); |
| 942 | |
| 943 | return retval; |
| 944 | } |
| 945 | EXPORT_SYMBOL(vme_dma_list_free); |
| 946 | |
| 947 | int vme_dma_free(struct vme_resource *resource) |
| 948 | { |
| 949 | struct vme_dma_resource *ctrlr; |
| 950 | |
| 951 | if (resource->type != VME_DMA) { |
| 952 | printk("Not a DMA resource\n"); |
| 953 | return -EINVAL; |
| 954 | } |
| 955 | |
| 956 | ctrlr = list_entry(resource->entry, struct vme_dma_resource, list); |
| 957 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 958 | if (mutex_trylock(&(ctrlr->mtx))) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 959 | printk("Resource busy, can't free\n"); |
| 960 | return -EBUSY; |
| 961 | } |
| 962 | |
| 963 | if (!(list_empty(&(ctrlr->pending)) && list_empty(&(ctrlr->running)))) { |
| 964 | printk("Resource still processing transfers\n"); |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 965 | mutex_unlock(&(ctrlr->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 966 | return -EBUSY; |
| 967 | } |
| 968 | |
| 969 | ctrlr->locked = 0; |
| 970 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 971 | mutex_unlock(&(ctrlr->mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 972 | |
| 973 | return 0; |
| 974 | } |
| 975 | EXPORT_SYMBOL(vme_dma_free); |
| 976 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 977 | void vme_irq_handler(struct vme_bridge *bridge, int level, int statid) |
| 978 | { |
| 979 | void (*call)(int, int, void *); |
| 980 | void *priv_data; |
| 981 | |
| 982 | call = bridge->irq[level - 1].callback[statid].func; |
| 983 | priv_data = bridge->irq[level - 1].callback[statid].priv_data; |
| 984 | |
| 985 | if (call != NULL) |
| 986 | call(level, statid, priv_data); |
| 987 | else |
| 988 | printk(KERN_WARNING "Spurilous VME interrupt, level:%x, " |
| 989 | "vector:%x\n", level, statid); |
| 990 | } |
| 991 | EXPORT_SYMBOL(vme_irq_handler); |
| 992 | |
| 993 | int vme_irq_request(struct device *dev, int level, int statid, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 994 | void (*callback)(int level, int vector, void *priv_data), |
| 995 | void *priv_data) |
| 996 | { |
| 997 | struct vme_bridge *bridge; |
| 998 | |
| 999 | bridge = dev_to_bridge(dev); |
| 1000 | if (bridge == NULL) { |
| 1001 | printk(KERN_ERR "Can't find VME bus\n"); |
| 1002 | return -EINVAL; |
| 1003 | } |
| 1004 | |
| 1005 | if((level < 1) || (level > 7)) { |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1006 | printk(KERN_ERR "Invalid interrupt level\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1007 | return -EINVAL; |
| 1008 | } |
| 1009 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1010 | if (bridge->irq_set == NULL) { |
| 1011 | printk(KERN_ERR "Configuring interrupts not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1012 | return -EINVAL; |
| 1013 | } |
| 1014 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1015 | mutex_lock(&(bridge->irq_mtx)); |
| 1016 | |
| 1017 | if (bridge->irq[level - 1].callback[statid].func) { |
| 1018 | mutex_unlock(&(bridge->irq_mtx)); |
| 1019 | printk(KERN_WARNING "VME Interrupt already taken\n"); |
| 1020 | return -EBUSY; |
| 1021 | } |
| 1022 | |
| 1023 | bridge->irq[level - 1].count++; |
| 1024 | bridge->irq[level - 1].callback[statid].priv_data = priv_data; |
| 1025 | bridge->irq[level - 1].callback[statid].func = callback; |
| 1026 | |
| 1027 | /* Enable IRQ level */ |
| 1028 | bridge->irq_set(level, 1, 1); |
| 1029 | |
| 1030 | mutex_unlock(&(bridge->irq_mtx)); |
| 1031 | |
| 1032 | return 0; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1033 | } |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1034 | EXPORT_SYMBOL(vme_irq_request); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1035 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1036 | void vme_irq_free(struct device *dev, int level, int statid) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1037 | { |
| 1038 | struct vme_bridge *bridge; |
| 1039 | |
| 1040 | bridge = dev_to_bridge(dev); |
| 1041 | if (bridge == NULL) { |
| 1042 | printk(KERN_ERR "Can't find VME bus\n"); |
| 1043 | return; |
| 1044 | } |
| 1045 | |
| 1046 | if((level < 1) || (level > 7)) { |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1047 | printk(KERN_ERR "Invalid interrupt level\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1048 | return; |
| 1049 | } |
| 1050 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1051 | if (bridge->irq_set == NULL) { |
| 1052 | printk(KERN_ERR "Configuring interrupts not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1053 | return; |
| 1054 | } |
| 1055 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1056 | mutex_lock(&(bridge->irq_mtx)); |
| 1057 | |
| 1058 | bridge->irq[level - 1].count--; |
| 1059 | |
| 1060 | /* Disable IRQ level if no more interrupts attached at this level*/ |
| 1061 | if (bridge->irq[level - 1].count == 0) |
| 1062 | bridge->irq_set(level, 0, 1); |
| 1063 | |
| 1064 | bridge->irq[level - 1].callback[statid].func = NULL; |
| 1065 | bridge->irq[level - 1].callback[statid].priv_data = NULL; |
| 1066 | |
| 1067 | mutex_unlock(&(bridge->irq_mtx)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1068 | } |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1069 | EXPORT_SYMBOL(vme_irq_free); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1070 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1071 | int vme_irq_generate(struct device *dev, int level, int statid) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1072 | { |
| 1073 | struct vme_bridge *bridge; |
| 1074 | |
| 1075 | bridge = dev_to_bridge(dev); |
| 1076 | if (bridge == NULL) { |
| 1077 | printk(KERN_ERR "Can't find VME bus\n"); |
| 1078 | return -EINVAL; |
| 1079 | } |
| 1080 | |
| 1081 | if((level < 1) || (level > 7)) { |
| 1082 | printk(KERN_WARNING "Invalid interrupt level\n"); |
| 1083 | return -EINVAL; |
| 1084 | } |
| 1085 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1086 | if (bridge->irq_generate == NULL) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1087 | printk("Interrupt generation not supported\n"); |
| 1088 | return -EINVAL; |
| 1089 | } |
| 1090 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1091 | return bridge->irq_generate(level, statid); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1092 | } |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1093 | EXPORT_SYMBOL(vme_irq_generate); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1094 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1095 | /* |
| 1096 | * Request the location monitor, return resource or NULL |
| 1097 | */ |
| 1098 | struct vme_resource *vme_lm_request(struct device *dev) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1099 | { |
| 1100 | struct vme_bridge *bridge; |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1101 | struct list_head *lm_pos = NULL; |
| 1102 | struct vme_lm_resource *allocated_lm = NULL; |
| 1103 | struct vme_lm_resource *lm = NULL; |
| 1104 | struct vme_resource *resource = NULL; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1105 | |
| 1106 | bridge = dev_to_bridge(dev); |
| 1107 | if (bridge == NULL) { |
| 1108 | printk(KERN_ERR "Can't find VME bus\n"); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1109 | goto err_bus; |
| 1110 | } |
| 1111 | |
| 1112 | /* Loop through DMA resources */ |
| 1113 | list_for_each(lm_pos, &(bridge->lm_resources)) { |
| 1114 | lm = list_entry(lm_pos, |
| 1115 | struct vme_lm_resource, list); |
| 1116 | |
| 1117 | if (lm == NULL) { |
| 1118 | printk(KERN_ERR "Registered NULL Location Monitor " |
| 1119 | "resource\n"); |
| 1120 | continue; |
| 1121 | } |
| 1122 | |
| 1123 | /* Find an unlocked controller */ |
| 1124 | mutex_lock(&(lm->mtx)); |
| 1125 | if (lm->locked == 0) { |
| 1126 | lm->locked = 1; |
| 1127 | mutex_unlock(&(lm->mtx)); |
| 1128 | allocated_lm = lm; |
| 1129 | break; |
| 1130 | } |
| 1131 | mutex_unlock(&(lm->mtx)); |
| 1132 | } |
| 1133 | |
| 1134 | /* Check to see if we found a resource */ |
| 1135 | if (allocated_lm == NULL) |
| 1136 | goto err_lm; |
| 1137 | |
| 1138 | resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL); |
| 1139 | if (resource == NULL) { |
| 1140 | printk(KERN_ERR "Unable to allocate resource structure\n"); |
| 1141 | goto err_alloc; |
| 1142 | } |
| 1143 | resource->type = VME_LM; |
| 1144 | resource->entry = &(allocated_lm->list); |
| 1145 | |
| 1146 | return resource; |
| 1147 | |
| 1148 | err_alloc: |
| 1149 | /* Unlock image */ |
| 1150 | mutex_lock(&(lm->mtx)); |
| 1151 | lm->locked = 0; |
| 1152 | mutex_unlock(&(lm->mtx)); |
| 1153 | err_lm: |
| 1154 | err_bus: |
| 1155 | return NULL; |
| 1156 | } |
| 1157 | EXPORT_SYMBOL(vme_lm_request); |
| 1158 | |
| 1159 | int vme_lm_count(struct vme_resource *resource) |
| 1160 | { |
| 1161 | struct vme_lm_resource *lm; |
| 1162 | |
| 1163 | if (resource->type != VME_LM) { |
| 1164 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1165 | return -EINVAL; |
| 1166 | } |
| 1167 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1168 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1169 | |
| 1170 | return lm->monitors; |
| 1171 | } |
| 1172 | EXPORT_SYMBOL(vme_lm_count); |
| 1173 | |
| 1174 | int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base, |
| 1175 | vme_address_t aspace, vme_cycle_t cycle) |
| 1176 | { |
| 1177 | struct vme_bridge *bridge = find_bridge(resource); |
| 1178 | struct vme_lm_resource *lm; |
| 1179 | |
| 1180 | if (resource->type != VME_LM) { |
| 1181 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
| 1182 | return -EINVAL; |
| 1183 | } |
| 1184 | |
| 1185 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1186 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1187 | if (bridge->lm_set == NULL) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1188 | printk(KERN_ERR "vme_lm_set not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1189 | return -EINVAL; |
| 1190 | } |
| 1191 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1192 | /* XXX Check parameters */ |
| 1193 | |
Martyn Welch | 8be9226 | 2009-10-29 16:35:08 +0000 | [diff] [blame^] | 1194 | return bridge->lm_set(lm, lm_base, aspace, cycle); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1195 | } |
| 1196 | EXPORT_SYMBOL(vme_lm_set); |
| 1197 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1198 | int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base, |
| 1199 | vme_address_t *aspace, vme_cycle_t *cycle) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1200 | { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1201 | struct vme_bridge *bridge = find_bridge(resource); |
| 1202 | struct vme_lm_resource *lm; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1203 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1204 | if (resource->type != VME_LM) { |
| 1205 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1206 | return -EINVAL; |
| 1207 | } |
| 1208 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1209 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1210 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1211 | if (bridge->lm_get == NULL) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1212 | printk(KERN_ERR "vme_lm_get not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1213 | return -EINVAL; |
| 1214 | } |
| 1215 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1216 | return bridge->lm_get(lm, lm_base, aspace, cycle); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1217 | } |
| 1218 | EXPORT_SYMBOL(vme_lm_get); |
| 1219 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1220 | int vme_lm_attach(struct vme_resource *resource, int monitor, |
| 1221 | void (*callback)(int)) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1222 | { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1223 | struct vme_bridge *bridge = find_bridge(resource); |
| 1224 | struct vme_lm_resource *lm; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1225 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1226 | if (resource->type != VME_LM) { |
| 1227 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1228 | return -EINVAL; |
| 1229 | } |
| 1230 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1231 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1232 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1233 | if (bridge->lm_attach == NULL) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1234 | printk(KERN_ERR "vme_lm_attach not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1235 | return -EINVAL; |
| 1236 | } |
| 1237 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1238 | return bridge->lm_attach(lm, monitor, callback); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1239 | } |
| 1240 | EXPORT_SYMBOL(vme_lm_attach); |
| 1241 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1242 | int vme_lm_detach(struct vme_resource *resource, int monitor) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1243 | { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1244 | struct vme_bridge *bridge = find_bridge(resource); |
| 1245 | struct vme_lm_resource *lm; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1246 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1247 | if (resource->type != VME_LM) { |
| 1248 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1249 | return -EINVAL; |
| 1250 | } |
| 1251 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1252 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1253 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1254 | if (bridge->lm_detach == NULL) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1255 | printk(KERN_ERR "vme_lm_detach not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1256 | return -EINVAL; |
| 1257 | } |
| 1258 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1259 | return bridge->lm_detach(lm, monitor); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1260 | } |
| 1261 | EXPORT_SYMBOL(vme_lm_detach); |
| 1262 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1263 | void vme_lm_free(struct vme_resource *resource) |
| 1264 | { |
| 1265 | struct vme_lm_resource *lm; |
| 1266 | |
| 1267 | if (resource->type != VME_LM) { |
| 1268 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
| 1269 | return; |
| 1270 | } |
| 1271 | |
| 1272 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1273 | |
Martyn Welch | 8be9226 | 2009-10-29 16:35:08 +0000 | [diff] [blame^] | 1274 | mutex_lock(&(lm->mtx)); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1275 | |
Martyn Welch | 8be9226 | 2009-10-29 16:35:08 +0000 | [diff] [blame^] | 1276 | /* XXX |
| 1277 | * Check to see that there aren't any callbacks still attached, if |
| 1278 | * there are we should probably be detaching them! |
| 1279 | */ |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1280 | |
| 1281 | lm->locked = 0; |
| 1282 | |
| 1283 | mutex_unlock(&(lm->mtx)); |
Martyn Welch | 8be9226 | 2009-10-29 16:35:08 +0000 | [diff] [blame^] | 1284 | |
| 1285 | kfree(resource); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1286 | } |
| 1287 | EXPORT_SYMBOL(vme_lm_free); |
| 1288 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1289 | int vme_slot_get(struct device *bus) |
| 1290 | { |
| 1291 | struct vme_bridge *bridge; |
| 1292 | |
| 1293 | bridge = dev_to_bridge(bus); |
| 1294 | if (bridge == NULL) { |
| 1295 | printk(KERN_ERR "Can't find VME bus\n"); |
| 1296 | return -EINVAL; |
| 1297 | } |
| 1298 | |
| 1299 | if (bridge->slot_get == NULL) { |
| 1300 | printk("vme_slot_get not supported\n"); |
| 1301 | return -EINVAL; |
| 1302 | } |
| 1303 | |
| 1304 | return bridge->slot_get(); |
| 1305 | } |
| 1306 | EXPORT_SYMBOL(vme_slot_get); |
| 1307 | |
| 1308 | |
| 1309 | /* - Bridge Registration --------------------------------------------------- */ |
| 1310 | |
| 1311 | static int vme_alloc_bus_num(void) |
| 1312 | { |
| 1313 | int i; |
| 1314 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 1315 | mutex_lock(&vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1316 | for (i = 0; i < sizeof(vme_bus_numbers) * 8; i++) { |
| 1317 | if (((vme_bus_numbers >> i) & 0x1) == 0) { |
| 1318 | vme_bus_numbers |= (0x1 << i); |
| 1319 | break; |
| 1320 | } |
| 1321 | } |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 1322 | mutex_unlock(&vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1323 | |
| 1324 | return i; |
| 1325 | } |
| 1326 | |
| 1327 | static void vme_free_bus_num(int bus) |
| 1328 | { |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 1329 | mutex_lock(&vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1330 | vme_bus_numbers |= ~(0x1 << bus); |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 1331 | mutex_unlock(&vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1332 | } |
| 1333 | |
| 1334 | int vme_register_bridge (struct vme_bridge *bridge) |
| 1335 | { |
| 1336 | struct device *dev; |
| 1337 | int retval; |
| 1338 | int i; |
| 1339 | |
| 1340 | bridge->num = vme_alloc_bus_num(); |
| 1341 | |
| 1342 | /* This creates 32 vme "slot" devices. This equates to a slot for each |
| 1343 | * ID available in a system conforming to the ANSI/VITA 1-1994 |
| 1344 | * specification. |
| 1345 | */ |
| 1346 | for (i = 0; i < VME_SLOTS_MAX; i++) { |
| 1347 | dev = &(bridge->dev[i]); |
| 1348 | memset(dev, 0, sizeof(struct device)); |
| 1349 | |
| 1350 | dev->parent = bridge->parent; |
| 1351 | dev->bus = &(vme_bus_type); |
| 1352 | /* |
| 1353 | * We save a pointer to the bridge in platform_data so that we |
| 1354 | * can get to it later. We keep driver_data for use by the |
| 1355 | * driver that binds against the slot |
| 1356 | */ |
| 1357 | dev->platform_data = bridge; |
| 1358 | dev_set_name(dev, "vme-%x.%x", bridge->num, i + 1); |
| 1359 | |
| 1360 | retval = device_register(dev); |
| 1361 | if(retval) |
| 1362 | goto err_reg; |
| 1363 | } |
| 1364 | |
| 1365 | return retval; |
| 1366 | |
| 1367 | i = VME_SLOTS_MAX; |
| 1368 | err_reg: |
| 1369 | while (i > -1) { |
| 1370 | dev = &(bridge->dev[i]); |
| 1371 | device_unregister(dev); |
| 1372 | } |
| 1373 | vme_free_bus_num(bridge->num); |
| 1374 | return retval; |
| 1375 | } |
| 1376 | EXPORT_SYMBOL(vme_register_bridge); |
| 1377 | |
| 1378 | void vme_unregister_bridge (struct vme_bridge *bridge) |
| 1379 | { |
| 1380 | int i; |
| 1381 | struct device *dev; |
| 1382 | |
| 1383 | |
| 1384 | for (i = 0; i < VME_SLOTS_MAX; i++) { |
| 1385 | dev = &(bridge->dev[i]); |
| 1386 | device_unregister(dev); |
| 1387 | } |
| 1388 | vme_free_bus_num(bridge->num); |
| 1389 | } |
| 1390 | EXPORT_SYMBOL(vme_unregister_bridge); |
| 1391 | |
| 1392 | |
| 1393 | /* - Driver Registration --------------------------------------------------- */ |
| 1394 | |
| 1395 | int vme_register_driver (struct vme_driver *drv) |
| 1396 | { |
| 1397 | drv->driver.name = drv->name; |
| 1398 | drv->driver.bus = &vme_bus_type; |
| 1399 | |
| 1400 | return driver_register(&drv->driver); |
| 1401 | } |
| 1402 | EXPORT_SYMBOL(vme_register_driver); |
| 1403 | |
| 1404 | void vme_unregister_driver (struct vme_driver *drv) |
| 1405 | { |
| 1406 | driver_unregister(&drv->driver); |
| 1407 | } |
| 1408 | EXPORT_SYMBOL(vme_unregister_driver); |
| 1409 | |
| 1410 | /* - Bus Registration ------------------------------------------------------ */ |
| 1411 | |
| 1412 | int vme_calc_slot(struct device *dev) |
| 1413 | { |
| 1414 | struct vme_bridge *bridge; |
| 1415 | int num; |
| 1416 | |
| 1417 | bridge = dev_to_bridge(dev); |
| 1418 | |
| 1419 | /* Determine slot number */ |
| 1420 | num = 0; |
| 1421 | while(num < VME_SLOTS_MAX) { |
| 1422 | if(&(bridge->dev[num]) == dev) { |
| 1423 | break; |
| 1424 | } |
| 1425 | num++; |
| 1426 | } |
| 1427 | if (num == VME_SLOTS_MAX) { |
| 1428 | dev_err(dev, "Failed to identify slot\n"); |
| 1429 | num = 0; |
| 1430 | goto err_dev; |
| 1431 | } |
| 1432 | num++; |
| 1433 | |
| 1434 | err_dev: |
| 1435 | return num; |
| 1436 | } |
| 1437 | |
| 1438 | static struct vme_driver *dev_to_vme_driver(struct device *dev) |
| 1439 | { |
| 1440 | if(dev->driver == NULL) |
| 1441 | printk("Bugger dev->driver is NULL\n"); |
| 1442 | |
| 1443 | return container_of(dev->driver, struct vme_driver, driver); |
| 1444 | } |
| 1445 | |
| 1446 | static int vme_bus_match(struct device *dev, struct device_driver *drv) |
| 1447 | { |
| 1448 | struct vme_bridge *bridge; |
| 1449 | struct vme_driver *driver; |
| 1450 | int i, num; |
| 1451 | |
| 1452 | bridge = dev_to_bridge(dev); |
| 1453 | driver = container_of(drv, struct vme_driver, driver); |
| 1454 | |
| 1455 | num = vme_calc_slot(dev); |
| 1456 | if (!num) |
| 1457 | goto err_dev; |
| 1458 | |
| 1459 | if (driver->bind_table == NULL) { |
| 1460 | dev_err(dev, "Bind table NULL\n"); |
| 1461 | goto err_table; |
| 1462 | } |
| 1463 | |
| 1464 | i = 0; |
| 1465 | while((driver->bind_table[i].bus != 0) || |
| 1466 | (driver->bind_table[i].slot != 0)) { |
| 1467 | |
Martyn Welch | a37b0da | 2009-08-06 09:43:07 +0100 | [diff] [blame] | 1468 | if (bridge->num == driver->bind_table[i].bus) { |
| 1469 | if (num == driver->bind_table[i].slot) |
| 1470 | return 1; |
| 1471 | |
| 1472 | if (driver->bind_table[i].slot == VME_SLOT_ALL) |
| 1473 | return 1; |
| 1474 | |
| 1475 | if ((driver->bind_table[i].slot == VME_SLOT_CURRENT) && |
| 1476 | (num == vme_slot_get(dev))) |
| 1477 | return 1; |
| 1478 | } |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1479 | i++; |
| 1480 | } |
| 1481 | |
| 1482 | err_dev: |
| 1483 | err_table: |
| 1484 | return 0; |
| 1485 | } |
| 1486 | |
| 1487 | static int vme_bus_probe(struct device *dev) |
| 1488 | { |
| 1489 | struct vme_bridge *bridge; |
| 1490 | struct vme_driver *driver; |
| 1491 | int retval = -ENODEV; |
| 1492 | |
| 1493 | driver = dev_to_vme_driver(dev); |
| 1494 | bridge = dev_to_bridge(dev); |
| 1495 | |
| 1496 | if(driver->probe != NULL) { |
| 1497 | retval = driver->probe(dev, bridge->num, vme_calc_slot(dev)); |
| 1498 | } |
| 1499 | |
| 1500 | return retval; |
| 1501 | } |
| 1502 | |
| 1503 | static int vme_bus_remove(struct device *dev) |
| 1504 | { |
| 1505 | struct vme_bridge *bridge; |
| 1506 | struct vme_driver *driver; |
| 1507 | int retval = -ENODEV; |
| 1508 | |
| 1509 | driver = dev_to_vme_driver(dev); |
| 1510 | bridge = dev_to_bridge(dev); |
| 1511 | |
| 1512 | if(driver->remove != NULL) { |
| 1513 | retval = driver->remove(dev, bridge->num, vme_calc_slot(dev)); |
| 1514 | } |
| 1515 | |
| 1516 | return retval; |
| 1517 | } |
| 1518 | |
| 1519 | struct bus_type vme_bus_type = { |
| 1520 | .name = "vme", |
| 1521 | .match = vme_bus_match, |
| 1522 | .probe = vme_bus_probe, |
| 1523 | .remove = vme_bus_remove, |
| 1524 | }; |
| 1525 | EXPORT_SYMBOL(vme_bus_type); |
| 1526 | |
| 1527 | static int __init vme_init (void) |
| 1528 | { |
| 1529 | return bus_register(&vme_bus_type); |
| 1530 | } |
| 1531 | |
| 1532 | static void __exit vme_exit (void) |
| 1533 | { |
| 1534 | bus_unregister(&vme_bus_type); |
| 1535 | } |
| 1536 | |
| 1537 | MODULE_DESCRIPTION("VME bridge driver framework"); |
| 1538 | MODULE_AUTHOR("Martyn Welch <martyn.welch@gefanuc.com"); |
| 1539 | MODULE_LICENSE("GPL"); |
| 1540 | |
| 1541 | module_init(vme_init); |
| 1542 | module_exit(vme_exit); |