4 * Author: Martyn Welch <martyn.welch@ge.com>
5 * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
7 * Based on work by Tom Armistead and Ajit Prem
8 * Copyright 2004 Motorola Inc.
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.
16 #include <linux/module.h>
17 #include <linux/moduleparam.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>
30 #include <linux/mutex.h>
31 #include <linux/spinlock.h>
32 #include <linux/slab.h>
33 #include <linux/vme.h>
35 #include "vme_bridge.h"
37 /* Bitmask and list of registered buses both protected by common mutex */
38 static unsigned int vme_bus_numbers;
39 static LIST_HEAD(vme_bus_list);
40 static DEFINE_MUTEX(vme_buses_lock);
42 static void __exit vme_exit(void);
43 static int __init vme_init(void);
45 static struct vme_dev *dev_to_vme_dev(struct device *dev)
47 return container_of(dev, struct vme_dev, dev);
51 * Find the bridge that the resource is associated with.
53 static struct vme_bridge *find_bridge(struct vme_resource *resource)
55 /* Get list to search */
56 switch (resource->type) {
58 return list_entry(resource->entry, struct vme_master_resource,
62 return list_entry(resource->entry, struct vme_slave_resource,
66 return list_entry(resource->entry, struct vme_dma_resource,
70 return list_entry(resource->entry, struct vme_lm_resource,
74 printk(KERN_ERR "Unknown resource type\n");
81 * Allocate a contiguous block of memory for use by the driver. This is used to
82 * create the buffers for the slave windows.
84 void *vme_alloc_consistent(struct vme_resource *resource, size_t size,
87 struct vme_bridge *bridge;
89 if (resource == NULL) {
90 printk(KERN_ERR "No resource\n");
94 bridge = find_bridge(resource);
96 printk(KERN_ERR "Can't find bridge\n");
100 if (bridge->parent == NULL) {
101 printk(KERN_ERR "Dev entry NULL for bridge %s\n", bridge->name);
105 if (bridge->alloc_consistent == NULL) {
106 printk(KERN_ERR "alloc_consistent not supported by bridge %s\n",
111 return bridge->alloc_consistent(bridge->parent, size, dma);
113 EXPORT_SYMBOL(vme_alloc_consistent);
116 * Free previously allocated contiguous block of memory.
118 void vme_free_consistent(struct vme_resource *resource, size_t size,
119 void *vaddr, dma_addr_t dma)
121 struct vme_bridge *bridge;
123 if (resource == NULL) {
124 printk(KERN_ERR "No resource\n");
128 bridge = find_bridge(resource);
129 if (bridge == NULL) {
130 printk(KERN_ERR "Can't find bridge\n");
134 if (bridge->parent == NULL) {
135 printk(KERN_ERR "Dev entry NULL for bridge %s\n", bridge->name);
139 if (bridge->free_consistent == NULL) {
140 printk(KERN_ERR "free_consistent not supported by bridge %s\n",
145 bridge->free_consistent(bridge->parent, size, vaddr, dma);
147 EXPORT_SYMBOL(vme_free_consistent);
149 size_t vme_get_size(struct vme_resource *resource)
152 unsigned long long base, size;
154 u32 aspace, cycle, dwidth;
156 switch (resource->type) {
158 retval = vme_master_get(resource, &enabled, &base, &size,
159 &aspace, &cycle, &dwidth);
164 retval = vme_slave_get(resource, &enabled, &base, &size,
165 &buf_base, &aspace, &cycle);
173 printk(KERN_ERR "Unknown resource type\n");
178 EXPORT_SYMBOL(vme_get_size);
180 static int vme_check_window(u32 aspace, unsigned long long vme_base,
181 unsigned long long size)
187 if (((vme_base + size) > VME_A16_MAX) ||
188 (vme_base > VME_A16_MAX))
192 if (((vme_base + size) > VME_A24_MAX) ||
193 (vme_base > VME_A24_MAX))
197 if (((vme_base + size) > VME_A32_MAX) ||
198 (vme_base > VME_A32_MAX))
203 * Any value held in an unsigned long long can be used as the
208 if (((vme_base + size) > VME_CRCSR_MAX) ||
209 (vme_base > VME_CRCSR_MAX))
219 printk(KERN_ERR "Invalid address space\n");
228 * Request a slave image with specific attributes, return some unique
231 struct vme_resource *vme_slave_request(struct vme_dev *vdev, u32 address,
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;
240 bridge = vdev->bridge;
241 if (bridge == NULL) {
242 printk(KERN_ERR "Can't find VME bus\n");
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);
251 if (slave_image == NULL) {
252 printk(KERN_ERR "Registered NULL Slave resource\n");
256 /* Find an unlocked and compatible image */
257 mutex_lock(&slave_image->mtx);
258 if (((slave_image->address_attr & address) == address) &&
259 ((slave_image->cycle_attr & cycle) == cycle) &&
260 (slave_image->locked == 0)) {
262 slave_image->locked = 1;
263 mutex_unlock(&slave_image->mtx);
264 allocated_image = slave_image;
267 mutex_unlock(&slave_image->mtx);
271 if (allocated_image == NULL)
274 resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
275 if (resource == NULL) {
276 printk(KERN_WARNING "Unable to allocate resource structure\n");
279 resource->type = VME_SLAVE;
280 resource->entry = &allocated_image->list;
286 mutex_lock(&slave_image->mtx);
287 slave_image->locked = 0;
288 mutex_unlock(&slave_image->mtx);
293 EXPORT_SYMBOL(vme_slave_request);
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, u32 aspace, u32 cycle)
299 struct vme_bridge *bridge = find_bridge(resource);
300 struct vme_slave_resource *image;
303 if (resource->type != VME_SLAVE) {
304 printk(KERN_ERR "Not a slave resource\n");
308 image = list_entry(resource->entry, struct vme_slave_resource, list);
310 if (bridge->slave_set == NULL) {
311 printk(KERN_ERR "Function not supported\n");
315 if (!(((image->address_attr & aspace) == aspace) &&
316 ((image->cycle_attr & cycle) == cycle))) {
317 printk(KERN_ERR "Invalid attributes\n");
321 retval = vme_check_window(aspace, vme_base, size);
325 return bridge->slave_set(image, enabled, vme_base, size, buf_base,
328 EXPORT_SYMBOL(vme_slave_set);
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, u32 *aspace, u32 *cycle)
334 struct vme_bridge *bridge = find_bridge(resource);
335 struct vme_slave_resource *image;
337 if (resource->type != VME_SLAVE) {
338 printk(KERN_ERR "Not a slave resource\n");
342 image = list_entry(resource->entry, struct vme_slave_resource, list);
344 if (bridge->slave_get == NULL) {
345 printk(KERN_ERR "vme_slave_get not supported\n");
349 return bridge->slave_get(image, enabled, vme_base, size, buf_base,
352 EXPORT_SYMBOL(vme_slave_get);
354 void vme_slave_free(struct vme_resource *resource)
356 struct vme_slave_resource *slave_image;
358 if (resource->type != VME_SLAVE) {
359 printk(KERN_ERR "Not a slave resource\n");
363 slave_image = list_entry(resource->entry, struct vme_slave_resource,
365 if (slave_image == NULL) {
366 printk(KERN_ERR "Can't find slave resource\n");
371 mutex_lock(&slave_image->mtx);
372 if (slave_image->locked == 0)
373 printk(KERN_ERR "Image is already free\n");
375 slave_image->locked = 0;
376 mutex_unlock(&slave_image->mtx);
378 /* Free up resource memory */
381 EXPORT_SYMBOL(vme_slave_free);
384 * Request a master image with specific attributes, return some unique
387 struct vme_resource *vme_master_request(struct vme_dev *vdev, u32 address,
388 u32 cycle, u32 dwidth)
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;
396 bridge = vdev->bridge;
397 if (bridge == NULL) {
398 printk(KERN_ERR "Can't find VME bus\n");
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);
407 if (master_image == NULL) {
408 printk(KERN_WARNING "Registered NULL master resource\n");
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)) {
419 master_image->locked = 1;
420 spin_unlock(&master_image->lock);
421 allocated_image = master_image;
424 spin_unlock(&master_image->lock);
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");
433 resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
434 if (resource == NULL) {
435 printk(KERN_ERR "Unable to allocate resource structure\n");
438 resource->type = VME_MASTER;
439 resource->entry = &allocated_image->list;
445 spin_lock(&master_image->lock);
446 master_image->locked = 0;
447 spin_unlock(&master_image->lock);
452 EXPORT_SYMBOL(vme_master_request);
454 int vme_master_set(struct vme_resource *resource, int enabled,
455 unsigned long long vme_base, unsigned long long size, u32 aspace,
456 u32 cycle, u32 dwidth)
458 struct vme_bridge *bridge = find_bridge(resource);
459 struct vme_master_resource *image;
462 if (resource->type != VME_MASTER) {
463 printk(KERN_ERR "Not a master resource\n");
467 image = list_entry(resource->entry, struct vme_master_resource, list);
469 if (bridge->master_set == NULL) {
470 printk(KERN_WARNING "vme_master_set not supported\n");
474 if (!(((image->address_attr & aspace) == aspace) &&
475 ((image->cycle_attr & cycle) == cycle) &&
476 ((image->width_attr & dwidth) == dwidth))) {
477 printk(KERN_WARNING "Invalid attributes\n");
481 retval = vme_check_window(aspace, vme_base, size);
485 return bridge->master_set(image, enabled, vme_base, size, aspace,
488 EXPORT_SYMBOL(vme_master_set);
490 int vme_master_get(struct vme_resource *resource, int *enabled,
491 unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
492 u32 *cycle, u32 *dwidth)
494 struct vme_bridge *bridge = find_bridge(resource);
495 struct vme_master_resource *image;
497 if (resource->type != VME_MASTER) {
498 printk(KERN_ERR "Not a master resource\n");
502 image = list_entry(resource->entry, struct vme_master_resource, list);
504 if (bridge->master_get == NULL) {
505 printk(KERN_WARNING "%s not supported\n", __func__);
509 return bridge->master_get(image, enabled, vme_base, size, aspace,
512 EXPORT_SYMBOL(vme_master_get);
515 * Read data out of VME space into a buffer.
517 ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count,
520 struct vme_bridge *bridge = find_bridge(resource);
521 struct vme_master_resource *image;
524 if (bridge->master_read == NULL) {
525 printk(KERN_WARNING "Reading from resource not supported\n");
529 if (resource->type != VME_MASTER) {
530 printk(KERN_ERR "Not a master resource\n");
534 image = list_entry(resource->entry, struct vme_master_resource, list);
536 length = vme_get_size(resource);
538 if (offset > length) {
539 printk(KERN_WARNING "Invalid Offset\n");
543 if ((offset + count) > length)
544 count = length - offset;
546 return bridge->master_read(image, buf, count, offset);
549 EXPORT_SYMBOL(vme_master_read);
552 * Write data out to VME space from a buffer.
554 ssize_t vme_master_write(struct vme_resource *resource, void *buf,
555 size_t count, loff_t offset)
557 struct vme_bridge *bridge = find_bridge(resource);
558 struct vme_master_resource *image;
561 if (bridge->master_write == NULL) {
562 printk(KERN_WARNING "Writing to resource not supported\n");
566 if (resource->type != VME_MASTER) {
567 printk(KERN_ERR "Not a master resource\n");
571 image = list_entry(resource->entry, struct vme_master_resource, list);
573 length = vme_get_size(resource);
575 if (offset > length) {
576 printk(KERN_WARNING "Invalid Offset\n");
580 if ((offset + count) > length)
581 count = length - offset;
583 return bridge->master_write(image, buf, count, offset);
585 EXPORT_SYMBOL(vme_master_write);
588 * Perform RMW cycle to provided location.
590 unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask,
591 unsigned int compare, unsigned int swap, loff_t offset)
593 struct vme_bridge *bridge = find_bridge(resource);
594 struct vme_master_resource *image;
596 if (bridge->master_rmw == NULL) {
597 printk(KERN_WARNING "Writing to resource not supported\n");
601 if (resource->type != VME_MASTER) {
602 printk(KERN_ERR "Not a master resource\n");
606 image = list_entry(resource->entry, struct vme_master_resource, list);
608 return bridge->master_rmw(image, mask, compare, swap, offset);
610 EXPORT_SYMBOL(vme_master_rmw);
612 int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma)
614 struct vme_master_resource *image;
615 phys_addr_t phys_addr;
616 unsigned long vma_size;
618 if (resource->type != VME_MASTER) {
619 pr_err("Not a master resource\n");
623 image = list_entry(resource->entry, struct vme_master_resource, list);
624 phys_addr = image->bus_resource.start + (vma->vm_pgoff << PAGE_SHIFT);
625 vma_size = vma->vm_end - vma->vm_start;
627 if (phys_addr + vma_size > image->bus_resource.end + 1) {
628 pr_err("Map size cannot exceed the window size\n");
632 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
634 return vm_iomap_memory(vma, phys_addr, vma->vm_end - vma->vm_start);
636 EXPORT_SYMBOL(vme_master_mmap);
638 void vme_master_free(struct vme_resource *resource)
640 struct vme_master_resource *master_image;
642 if (resource->type != VME_MASTER) {
643 printk(KERN_ERR "Not a master resource\n");
647 master_image = list_entry(resource->entry, struct vme_master_resource,
649 if (master_image == NULL) {
650 printk(KERN_ERR "Can't find master resource\n");
655 spin_lock(&master_image->lock);
656 if (master_image->locked == 0)
657 printk(KERN_ERR "Image is already free\n");
659 master_image->locked = 0;
660 spin_unlock(&master_image->lock);
662 /* Free up resource memory */
665 EXPORT_SYMBOL(vme_master_free);
668 * Request a DMA controller with specific attributes, return some unique
671 struct vme_resource *vme_dma_request(struct vme_dev *vdev, u32 route)
673 struct vme_bridge *bridge;
674 struct list_head *dma_pos = NULL;
675 struct vme_dma_resource *allocated_ctrlr = NULL;
676 struct vme_dma_resource *dma_ctrlr = NULL;
677 struct vme_resource *resource = NULL;
679 /* XXX Not checking resource attributes */
680 printk(KERN_ERR "No VME resource Attribute tests done\n");
682 bridge = vdev->bridge;
683 if (bridge == NULL) {
684 printk(KERN_ERR "Can't find VME bus\n");
688 /* Loop through DMA resources */
689 list_for_each(dma_pos, &bridge->dma_resources) {
690 dma_ctrlr = list_entry(dma_pos,
691 struct vme_dma_resource, list);
693 if (dma_ctrlr == NULL) {
694 printk(KERN_ERR "Registered NULL DMA resource\n");
698 /* Find an unlocked and compatible controller */
699 mutex_lock(&dma_ctrlr->mtx);
700 if (((dma_ctrlr->route_attr & route) == route) &&
701 (dma_ctrlr->locked == 0)) {
703 dma_ctrlr->locked = 1;
704 mutex_unlock(&dma_ctrlr->mtx);
705 allocated_ctrlr = dma_ctrlr;
708 mutex_unlock(&dma_ctrlr->mtx);
711 /* Check to see if we found a resource */
712 if (allocated_ctrlr == NULL)
715 resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
716 if (resource == NULL) {
717 printk(KERN_WARNING "Unable to allocate resource structure\n");
720 resource->type = VME_DMA;
721 resource->entry = &allocated_ctrlr->list;
727 mutex_lock(&dma_ctrlr->mtx);
728 dma_ctrlr->locked = 0;
729 mutex_unlock(&dma_ctrlr->mtx);
734 EXPORT_SYMBOL(vme_dma_request);
739 struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource)
741 struct vme_dma_resource *ctrlr;
742 struct vme_dma_list *dma_list;
744 if (resource->type != VME_DMA) {
745 printk(KERN_ERR "Not a DMA resource\n");
749 ctrlr = list_entry(resource->entry, struct vme_dma_resource, list);
751 dma_list = kmalloc(sizeof(struct vme_dma_list), GFP_KERNEL);
752 if (dma_list == NULL) {
753 printk(KERN_ERR "Unable to allocate memory for new dma list\n");
756 INIT_LIST_HEAD(&dma_list->entries);
757 dma_list->parent = ctrlr;
758 mutex_init(&dma_list->mtx);
762 EXPORT_SYMBOL(vme_new_dma_list);
765 * Create "Pattern" type attributes
767 struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern, u32 type)
769 struct vme_dma_attr *attributes;
770 struct vme_dma_pattern *pattern_attr;
772 attributes = kmalloc(sizeof(struct vme_dma_attr), GFP_KERNEL);
773 if (attributes == NULL) {
774 printk(KERN_ERR "Unable to allocate memory for attributes structure\n");
778 pattern_attr = kmalloc(sizeof(struct vme_dma_pattern), GFP_KERNEL);
779 if (pattern_attr == NULL) {
780 printk(KERN_ERR "Unable to allocate memory for pattern attributes\n");
784 attributes->type = VME_DMA_PATTERN;
785 attributes->private = (void *)pattern_attr;
787 pattern_attr->pattern = pattern;
788 pattern_attr->type = type;
797 EXPORT_SYMBOL(vme_dma_pattern_attribute);
800 * Create "PCI" type attributes
802 struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t address)
804 struct vme_dma_attr *attributes;
805 struct vme_dma_pci *pci_attr;
807 /* XXX Run some sanity checks here */
809 attributes = kmalloc(sizeof(struct vme_dma_attr), GFP_KERNEL);
810 if (attributes == NULL) {
811 printk(KERN_ERR "Unable to allocate memory for attributes structure\n");
815 pci_attr = kmalloc(sizeof(struct vme_dma_pci), GFP_KERNEL);
816 if (pci_attr == NULL) {
817 printk(KERN_ERR "Unable to allocate memory for pci attributes\n");
823 attributes->type = VME_DMA_PCI;
824 attributes->private = (void *)pci_attr;
826 pci_attr->address = address;
835 EXPORT_SYMBOL(vme_dma_pci_attribute);
838 * Create "VME" type attributes
840 struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address,
841 u32 aspace, u32 cycle, u32 dwidth)
843 struct vme_dma_attr *attributes;
844 struct vme_dma_vme *vme_attr;
846 attributes = kmalloc(
847 sizeof(struct vme_dma_attr), GFP_KERNEL);
848 if (attributes == NULL) {
849 printk(KERN_ERR "Unable to allocate memory for attributes structure\n");
853 vme_attr = kmalloc(sizeof(struct vme_dma_vme), GFP_KERNEL);
854 if (vme_attr == NULL) {
855 printk(KERN_ERR "Unable to allocate memory for vme attributes\n");
859 attributes->type = VME_DMA_VME;
860 attributes->private = (void *)vme_attr;
862 vme_attr->address = address;
863 vme_attr->aspace = aspace;
864 vme_attr->cycle = cycle;
865 vme_attr->dwidth = dwidth;
874 EXPORT_SYMBOL(vme_dma_vme_attribute);
879 void vme_dma_free_attribute(struct vme_dma_attr *attributes)
881 kfree(attributes->private);
884 EXPORT_SYMBOL(vme_dma_free_attribute);
886 int vme_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src,
887 struct vme_dma_attr *dest, size_t count)
889 struct vme_bridge *bridge = list->parent->parent;
892 if (bridge->dma_list_add == NULL) {
893 printk(KERN_WARNING "Link List DMA generation not supported\n");
897 if (!mutex_trylock(&list->mtx)) {
898 printk(KERN_ERR "Link List already submitted\n");
902 retval = bridge->dma_list_add(list, src, dest, count);
904 mutex_unlock(&list->mtx);
908 EXPORT_SYMBOL(vme_dma_list_add);
910 int vme_dma_list_exec(struct vme_dma_list *list)
912 struct vme_bridge *bridge = list->parent->parent;
915 if (bridge->dma_list_exec == NULL) {
916 printk(KERN_ERR "Link List DMA execution not supported\n");
920 mutex_lock(&list->mtx);
922 retval = bridge->dma_list_exec(list);
924 mutex_unlock(&list->mtx);
928 EXPORT_SYMBOL(vme_dma_list_exec);
930 int vme_dma_list_free(struct vme_dma_list *list)
932 struct vme_bridge *bridge = list->parent->parent;
935 if (bridge->dma_list_empty == NULL) {
936 printk(KERN_WARNING "Emptying of Link Lists not supported\n");
940 if (!mutex_trylock(&list->mtx)) {
941 printk(KERN_ERR "Link List in use\n");
946 * Empty out all of the entries from the dma list. We need to go to the
947 * low level driver as dma entries are driver specific.
949 retval = bridge->dma_list_empty(list);
951 printk(KERN_ERR "Unable to empty link-list entries\n");
952 mutex_unlock(&list->mtx);
955 mutex_unlock(&list->mtx);
960 EXPORT_SYMBOL(vme_dma_list_free);
962 int vme_dma_free(struct vme_resource *resource)
964 struct vme_dma_resource *ctrlr;
966 if (resource->type != VME_DMA) {
967 printk(KERN_ERR "Not a DMA resource\n");
971 ctrlr = list_entry(resource->entry, struct vme_dma_resource, list);
973 if (!mutex_trylock(&ctrlr->mtx)) {
974 printk(KERN_ERR "Resource busy, can't free\n");
978 if (!(list_empty(&ctrlr->pending) && list_empty(&ctrlr->running))) {
979 printk(KERN_WARNING "Resource still processing transfers\n");
980 mutex_unlock(&ctrlr->mtx);
986 mutex_unlock(&ctrlr->mtx);
992 EXPORT_SYMBOL(vme_dma_free);
994 void vme_irq_handler(struct vme_bridge *bridge, int level, int statid)
996 void (*call)(int, int, void *);
999 call = bridge->irq[level - 1].callback[statid].func;
1000 priv_data = bridge->irq[level - 1].callback[statid].priv_data;
1003 call(level, statid, priv_data);
1005 printk(KERN_WARNING "Spurilous VME interrupt, level:%x, vector:%x\n",
1008 EXPORT_SYMBOL(vme_irq_handler);
1010 int vme_irq_request(struct vme_dev *vdev, int level, int statid,
1011 void (*callback)(int, int, void *),
1014 struct vme_bridge *bridge;
1016 bridge = vdev->bridge;
1017 if (bridge == NULL) {
1018 printk(KERN_ERR "Can't find VME bus\n");
1022 if ((level < 1) || (level > 7)) {
1023 printk(KERN_ERR "Invalid interrupt level\n");
1027 if (bridge->irq_set == NULL) {
1028 printk(KERN_ERR "Configuring interrupts not supported\n");
1032 mutex_lock(&bridge->irq_mtx);
1034 if (bridge->irq[level - 1].callback[statid].func) {
1035 mutex_unlock(&bridge->irq_mtx);
1036 printk(KERN_WARNING "VME Interrupt already taken\n");
1040 bridge->irq[level - 1].count++;
1041 bridge->irq[level - 1].callback[statid].priv_data = priv_data;
1042 bridge->irq[level - 1].callback[statid].func = callback;
1044 /* Enable IRQ level */
1045 bridge->irq_set(bridge, level, 1, 1);
1047 mutex_unlock(&bridge->irq_mtx);
1051 EXPORT_SYMBOL(vme_irq_request);
1053 void vme_irq_free(struct vme_dev *vdev, int level, int statid)
1055 struct vme_bridge *bridge;
1057 bridge = vdev->bridge;
1058 if (bridge == NULL) {
1059 printk(KERN_ERR "Can't find VME bus\n");
1063 if ((level < 1) || (level > 7)) {
1064 printk(KERN_ERR "Invalid interrupt level\n");
1068 if (bridge->irq_set == NULL) {
1069 printk(KERN_ERR "Configuring interrupts not supported\n");
1073 mutex_lock(&bridge->irq_mtx);
1075 bridge->irq[level - 1].count--;
1077 /* Disable IRQ level if no more interrupts attached at this level*/
1078 if (bridge->irq[level - 1].count == 0)
1079 bridge->irq_set(bridge, level, 0, 1);
1081 bridge->irq[level - 1].callback[statid].func = NULL;
1082 bridge->irq[level - 1].callback[statid].priv_data = NULL;
1084 mutex_unlock(&bridge->irq_mtx);
1086 EXPORT_SYMBOL(vme_irq_free);
1088 int vme_irq_generate(struct vme_dev *vdev, int level, int statid)
1090 struct vme_bridge *bridge;
1092 bridge = vdev->bridge;
1093 if (bridge == NULL) {
1094 printk(KERN_ERR "Can't find VME bus\n");
1098 if ((level < 1) || (level > 7)) {
1099 printk(KERN_WARNING "Invalid interrupt level\n");
1103 if (bridge->irq_generate == NULL) {
1104 printk(KERN_WARNING "Interrupt generation not supported\n");
1108 return bridge->irq_generate(bridge, level, statid);
1110 EXPORT_SYMBOL(vme_irq_generate);
1113 * Request the location monitor, return resource or NULL
1115 struct vme_resource *vme_lm_request(struct vme_dev *vdev)
1117 struct vme_bridge *bridge;
1118 struct list_head *lm_pos = NULL;
1119 struct vme_lm_resource *allocated_lm = NULL;
1120 struct vme_lm_resource *lm = NULL;
1121 struct vme_resource *resource = NULL;
1123 bridge = vdev->bridge;
1124 if (bridge == NULL) {
1125 printk(KERN_ERR "Can't find VME bus\n");
1129 /* Loop through DMA resources */
1130 list_for_each(lm_pos, &bridge->lm_resources) {
1131 lm = list_entry(lm_pos,
1132 struct vme_lm_resource, list);
1135 printk(KERN_ERR "Registered NULL Location Monitor resource\n");
1139 /* Find an unlocked controller */
1140 mutex_lock(&lm->mtx);
1141 if (lm->locked == 0) {
1143 mutex_unlock(&lm->mtx);
1147 mutex_unlock(&lm->mtx);
1150 /* Check to see if we found a resource */
1151 if (allocated_lm == NULL)
1154 resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL);
1155 if (resource == NULL) {
1156 printk(KERN_ERR "Unable to allocate resource structure\n");
1159 resource->type = VME_LM;
1160 resource->entry = &allocated_lm->list;
1166 mutex_lock(&lm->mtx);
1168 mutex_unlock(&lm->mtx);
1173 EXPORT_SYMBOL(vme_lm_request);
1175 int vme_lm_count(struct vme_resource *resource)
1177 struct vme_lm_resource *lm;
1179 if (resource->type != VME_LM) {
1180 printk(KERN_ERR "Not a Location Monitor resource\n");
1184 lm = list_entry(resource->entry, struct vme_lm_resource, list);
1186 return lm->monitors;
1188 EXPORT_SYMBOL(vme_lm_count);
1190 int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base,
1191 u32 aspace, u32 cycle)
1193 struct vme_bridge *bridge = find_bridge(resource);
1194 struct vme_lm_resource *lm;
1196 if (resource->type != VME_LM) {
1197 printk(KERN_ERR "Not a Location Monitor resource\n");
1201 lm = list_entry(resource->entry, struct vme_lm_resource, list);
1203 if (bridge->lm_set == NULL) {
1204 printk(KERN_ERR "vme_lm_set not supported\n");
1208 return bridge->lm_set(lm, lm_base, aspace, cycle);
1210 EXPORT_SYMBOL(vme_lm_set);
1212 int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base,
1213 u32 *aspace, u32 *cycle)
1215 struct vme_bridge *bridge = find_bridge(resource);
1216 struct vme_lm_resource *lm;
1218 if (resource->type != VME_LM) {
1219 printk(KERN_ERR "Not a Location Monitor resource\n");
1223 lm = list_entry(resource->entry, struct vme_lm_resource, list);
1225 if (bridge->lm_get == NULL) {
1226 printk(KERN_ERR "vme_lm_get not supported\n");
1230 return bridge->lm_get(lm, lm_base, aspace, cycle);
1232 EXPORT_SYMBOL(vme_lm_get);
1234 int vme_lm_attach(struct vme_resource *resource, int monitor,
1235 void (*callback)(int))
1237 struct vme_bridge *bridge = find_bridge(resource);
1238 struct vme_lm_resource *lm;
1240 if (resource->type != VME_LM) {
1241 printk(KERN_ERR "Not a Location Monitor resource\n");
1245 lm = list_entry(resource->entry, struct vme_lm_resource, list);
1247 if (bridge->lm_attach == NULL) {
1248 printk(KERN_ERR "vme_lm_attach not supported\n");
1252 return bridge->lm_attach(lm, monitor, callback);
1254 EXPORT_SYMBOL(vme_lm_attach);
1256 int vme_lm_detach(struct vme_resource *resource, int monitor)
1258 struct vme_bridge *bridge = find_bridge(resource);
1259 struct vme_lm_resource *lm;
1261 if (resource->type != VME_LM) {
1262 printk(KERN_ERR "Not a Location Monitor resource\n");
1266 lm = list_entry(resource->entry, struct vme_lm_resource, list);
1268 if (bridge->lm_detach == NULL) {
1269 printk(KERN_ERR "vme_lm_detach not supported\n");
1273 return bridge->lm_detach(lm, monitor);
1275 EXPORT_SYMBOL(vme_lm_detach);
1277 void vme_lm_free(struct vme_resource *resource)
1279 struct vme_lm_resource *lm;
1281 if (resource->type != VME_LM) {
1282 printk(KERN_ERR "Not a Location Monitor resource\n");
1286 lm = list_entry(resource->entry, struct vme_lm_resource, list);
1288 mutex_lock(&lm->mtx);
1291 * Check to see that there aren't any callbacks still attached, if
1292 * there are we should probably be detaching them!
1297 mutex_unlock(&lm->mtx);
1301 EXPORT_SYMBOL(vme_lm_free);
1303 int vme_slot_num(struct vme_dev *vdev)
1305 struct vme_bridge *bridge;
1307 bridge = vdev->bridge;
1308 if (bridge == NULL) {
1309 printk(KERN_ERR "Can't find VME bus\n");
1313 if (bridge->slot_get == NULL) {
1314 printk(KERN_WARNING "vme_slot_num not supported\n");
1318 return bridge->slot_get(bridge);
1320 EXPORT_SYMBOL(vme_slot_num);
1322 int vme_bus_num(struct vme_dev *vdev)
1324 struct vme_bridge *bridge;
1326 bridge = vdev->bridge;
1327 if (bridge == NULL) {
1328 pr_err("Can't find VME bus\n");
1334 EXPORT_SYMBOL(vme_bus_num);
1336 /* - Bridge Registration --------------------------------------------------- */
1338 static void vme_dev_release(struct device *dev)
1340 kfree(dev_to_vme_dev(dev));
1343 int vme_register_bridge(struct vme_bridge *bridge)
1348 mutex_lock(&vme_buses_lock);
1349 for (i = 0; i < sizeof(vme_bus_numbers) * 8; i++) {
1350 if ((vme_bus_numbers & (1 << i)) == 0) {
1351 vme_bus_numbers |= (1 << i);
1353 INIT_LIST_HEAD(&bridge->devices);
1354 list_add_tail(&bridge->bus_list, &vme_bus_list);
1359 mutex_unlock(&vme_buses_lock);
1363 EXPORT_SYMBOL(vme_register_bridge);
1365 void vme_unregister_bridge(struct vme_bridge *bridge)
1367 struct vme_dev *vdev;
1368 struct vme_dev *tmp;
1370 mutex_lock(&vme_buses_lock);
1371 vme_bus_numbers &= ~(1 << bridge->num);
1372 list_for_each_entry_safe(vdev, tmp, &bridge->devices, bridge_list) {
1373 list_del(&vdev->drv_list);
1374 list_del(&vdev->bridge_list);
1375 device_unregister(&vdev->dev);
1377 list_del(&bridge->bus_list);
1378 mutex_unlock(&vme_buses_lock);
1380 EXPORT_SYMBOL(vme_unregister_bridge);
1382 /* - Driver Registration --------------------------------------------------- */
1384 static int __vme_register_driver_bus(struct vme_driver *drv,
1385 struct vme_bridge *bridge, unsigned int ndevs)
1389 struct vme_dev *vdev;
1390 struct vme_dev *tmp;
1392 for (i = 0; i < ndevs; i++) {
1393 vdev = kzalloc(sizeof(struct vme_dev), GFP_KERNEL);
1399 vdev->bridge = bridge;
1400 vdev->dev.platform_data = drv;
1401 vdev->dev.release = vme_dev_release;
1402 vdev->dev.parent = bridge->parent;
1403 vdev->dev.bus = &vme_bus_type;
1404 dev_set_name(&vdev->dev, "%s.%u-%u", drv->name, bridge->num,
1407 err = device_register(&vdev->dev);
1411 if (vdev->dev.platform_data) {
1412 list_add_tail(&vdev->drv_list, &drv->devices);
1413 list_add_tail(&vdev->bridge_list, &bridge->devices);
1415 device_unregister(&vdev->dev);
1420 put_device(&vdev->dev);
1423 list_for_each_entry_safe(vdev, tmp, &drv->devices, drv_list) {
1424 list_del(&vdev->drv_list);
1425 list_del(&vdev->bridge_list);
1426 device_unregister(&vdev->dev);
1431 static int __vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
1433 struct vme_bridge *bridge;
1436 mutex_lock(&vme_buses_lock);
1437 list_for_each_entry(bridge, &vme_bus_list, bus_list) {
1439 * This cannot cause trouble as we already have vme_buses_lock
1440 * and if the bridge is removed, it will have to go through
1441 * vme_unregister_bridge() to do it (which calls remove() on
1442 * the bridge which in turn tries to acquire vme_buses_lock and
1443 * will have to wait).
1445 err = __vme_register_driver_bus(drv, bridge, ndevs);
1449 mutex_unlock(&vme_buses_lock);
1453 int vme_register_driver(struct vme_driver *drv, unsigned int ndevs)
1457 drv->driver.name = drv->name;
1458 drv->driver.bus = &vme_bus_type;
1459 INIT_LIST_HEAD(&drv->devices);
1461 err = driver_register(&drv->driver);
1465 err = __vme_register_driver(drv, ndevs);
1467 driver_unregister(&drv->driver);
1471 EXPORT_SYMBOL(vme_register_driver);
1473 void vme_unregister_driver(struct vme_driver *drv)
1475 struct vme_dev *dev, *dev_tmp;
1477 mutex_lock(&vme_buses_lock);
1478 list_for_each_entry_safe(dev, dev_tmp, &drv->devices, drv_list) {
1479 list_del(&dev->drv_list);
1480 list_del(&dev->bridge_list);
1481 device_unregister(&dev->dev);
1483 mutex_unlock(&vme_buses_lock);
1485 driver_unregister(&drv->driver);
1487 EXPORT_SYMBOL(vme_unregister_driver);
1489 /* - Bus Registration ------------------------------------------------------ */
1491 static int vme_bus_match(struct device *dev, struct device_driver *drv)
1493 struct vme_driver *vme_drv;
1495 vme_drv = container_of(drv, struct vme_driver, driver);
1497 if (dev->platform_data == vme_drv) {
1498 struct vme_dev *vdev = dev_to_vme_dev(dev);
1500 if (vme_drv->match && vme_drv->match(vdev))
1503 dev->platform_data = NULL;
1508 static int vme_bus_probe(struct device *dev)
1510 int retval = -ENODEV;
1511 struct vme_driver *driver;
1512 struct vme_dev *vdev = dev_to_vme_dev(dev);
1514 driver = dev->platform_data;
1516 if (driver->probe != NULL)
1517 retval = driver->probe(vdev);
1522 static int vme_bus_remove(struct device *dev)
1524 int retval = -ENODEV;
1525 struct vme_driver *driver;
1526 struct vme_dev *vdev = dev_to_vme_dev(dev);
1528 driver = dev->platform_data;
1530 if (driver->remove != NULL)
1531 retval = driver->remove(vdev);
1536 struct bus_type vme_bus_type = {
1538 .match = vme_bus_match,
1539 .probe = vme_bus_probe,
1540 .remove = vme_bus_remove,
1542 EXPORT_SYMBOL(vme_bus_type);
1544 static int __init vme_init(void)
1546 return bus_register(&vme_bus_type);
1549 static void __exit vme_exit(void)
1551 bus_unregister(&vme_bus_type);
1554 subsys_initcall(vme_init);
1555 module_exit(vme_exit);