2 * Bus & driver management routines for devices within
3 * a MacIO ASIC. Interface to new driver model mostly
4 * stolen from the PCI version.
6 * Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
15 * - Don't probe below media bay by default, but instead provide
16 * some hooks for media bay to dynamically add/remove it's own
20 #include <linux/string.h>
21 #include <linux/kernel.h>
22 #include <linux/pci.h>
23 #include <linux/pci_ids.h>
24 #include <linux/init.h>
25 #include <linux/module.h>
26 #include <linux/slab.h>
28 #include <asm/machdep.h>
29 #include <asm/macio.h>
30 #include <asm/pmac_feature.h>
32 #include <asm/pci-bridge.h>
36 #define MAX_NODE_NAME_SIZE (BUS_ID_SIZE - 12)
38 static struct macio_chip *macio_on_hold;
40 static int macio_bus_match(struct device *dev, struct device_driver *drv)
42 struct macio_dev * macio_dev = to_macio_device(dev);
43 struct macio_driver * macio_drv = to_macio_driver(drv);
44 const struct of_device_id * matches = macio_drv->match_table;
49 return of_match_device(matches, &macio_dev->ofdev) != NULL;
52 struct macio_dev *macio_dev_get(struct macio_dev *dev)
58 tmp = get_device(&dev->ofdev.dev);
60 return to_macio_device(tmp);
65 void macio_dev_put(struct macio_dev *dev)
68 put_device(&dev->ofdev.dev);
72 static int macio_device_probe(struct device *dev)
75 struct macio_driver *drv;
76 struct macio_dev *macio_dev;
77 const struct of_device_id *match;
79 drv = to_macio_driver(dev->driver);
80 macio_dev = to_macio_device(dev);
85 macio_dev_get(macio_dev);
87 match = of_match_device(drv->match_table, &macio_dev->ofdev);
89 error = drv->probe(macio_dev, match);
91 macio_dev_put(macio_dev);
96 static int macio_device_remove(struct device *dev)
98 struct macio_dev * macio_dev = to_macio_device(dev);
99 struct macio_driver * drv = to_macio_driver(dev->driver);
101 if (dev->driver && drv->remove)
102 drv->remove(macio_dev);
103 macio_dev_put(macio_dev);
108 static void macio_device_shutdown(struct device *dev)
110 struct macio_dev * macio_dev = to_macio_device(dev);
111 struct macio_driver * drv = to_macio_driver(dev->driver);
113 if (dev->driver && drv->shutdown)
114 drv->shutdown(macio_dev);
117 static int macio_device_suspend(struct device *dev, pm_message_t state)
119 struct macio_dev * macio_dev = to_macio_device(dev);
120 struct macio_driver * drv = to_macio_driver(dev->driver);
122 if (dev->driver && drv->suspend)
123 return drv->suspend(macio_dev, state);
127 static int macio_device_resume(struct device * dev)
129 struct macio_dev * macio_dev = to_macio_device(dev);
130 struct macio_driver * drv = to_macio_driver(dev->driver);
132 if (dev->driver && drv->resume)
133 return drv->resume(macio_dev);
137 extern struct device_attribute macio_dev_attrs[];
139 struct bus_type macio_bus_type = {
141 .match = macio_bus_match,
142 .uevent = of_device_uevent,
143 .probe = macio_device_probe,
144 .remove = macio_device_remove,
145 .shutdown = macio_device_shutdown,
146 .suspend = macio_device_suspend,
147 .resume = macio_device_resume,
148 .dev_attrs = macio_dev_attrs,
151 static int __init macio_bus_driver_init(void)
153 return bus_register(&macio_bus_type);
156 postcore_initcall(macio_bus_driver_init);
160 * macio_release_dev - free a macio device structure when all users of it are
162 * @dev: device that's been disconnected
164 * Will be called only by the device core when all users of this macio device
165 * are done. This currently means never as we don't hot remove any macio
166 * device yet, though that will happen with mediabay based devices in a later
169 static void macio_release_dev(struct device *dev)
171 struct macio_dev *mdev;
173 mdev = to_macio_device(dev);
178 * macio_resource_quirks - tweak or skip some resources for a device
179 * @np: pointer to the device node
180 * @res: resulting resource
181 * @index: index of resource in node
183 * If this routine returns non-null, then the resource is completely
186 static int macio_resource_quirks(struct device_node *np, struct resource *res,
189 /* Only quirks for memory resources for now */
190 if ((res->flags & IORESOURCE_MEM) == 0)
193 /* Grand Central has too large resource 0 on some machines */
194 if (index == 0 && !strcmp(np->name, "gc"))
195 res->end = res->start + 0x1ffff;
197 /* Airport has bogus resource 2 */
198 if (index >= 2 && !strcmp(np->name, "radio"))
202 /* DBDMAs may have bogus sizes */
203 if ((res->start & 0x0001f000) == 0x00008000)
204 res->end = res->start + 0xff;
205 #endif /* CONFIG_PPC64 */
207 /* ESCC parent eats child resources. We could have added a
208 * level of hierarchy, but I don't really feel the need
211 if (!strcmp(np->name, "escc"))
214 /* ESCC has bogus resources >= 3 */
215 if (index >= 3 && !(strcmp(np->name, "ch-a") &&
216 strcmp(np->name, "ch-b")))
219 /* Media bay has too many resources, keep only first one */
220 if (index > 0 && !strcmp(np->name, "media-bay"))
223 /* Some older IDE resources have bogus sizes */
224 if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
225 strcmp(np->type, "ide") && strcmp(np->type, "ata"))) {
226 if (index == 0 && (res->end - res->start) > 0xfff)
227 res->end = res->start + 0xfff;
228 if (index == 1 && (res->end - res->start) > 0xff)
229 res->end = res->start + 0xff;
234 static void macio_create_fixup_irq(struct macio_dev *dev, int index,
239 irq = irq_create_mapping(NULL, line);
241 dev->interrupt[index].start = irq;
242 dev->interrupt[index].flags = IORESOURCE_IRQ;
243 dev->interrupt[index].name = dev->ofdev.dev.bus_id;
245 if (dev->n_interrupts <= index)
246 dev->n_interrupts = index + 1;
249 static void macio_add_missing_resources(struct macio_dev *dev)
251 struct device_node *np = dev->ofdev.node;
252 unsigned int irq_base;
254 /* Gatwick has some missing interrupts on child nodes */
255 if (dev->bus->chip->type != macio_gatwick)
258 /* irq_base is always 64 on gatwick. I have no cleaner way to get
259 * that value from here at this point
264 if (strcmp(np->name, "ch-a") == 0) {
265 macio_create_fixup_irq(dev, 0, 15 + irq_base);
266 macio_create_fixup_irq(dev, 1, 4 + irq_base);
267 macio_create_fixup_irq(dev, 2, 5 + irq_base);
268 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
272 if (strcmp(np->name, "media-bay") == 0) {
273 macio_create_fixup_irq(dev, 0, 29 + irq_base);
274 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
277 /* Fix left media bay childs */
278 if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) {
279 macio_create_fixup_irq(dev, 0, 19 + irq_base);
280 macio_create_fixup_irq(dev, 1, 1 + irq_base);
281 printk(KERN_INFO "macio: fixed left floppy irqs\n");
283 if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) {
284 macio_create_fixup_irq(dev, 0, 14 + irq_base);
285 macio_create_fixup_irq(dev, 0, 3 + irq_base);
286 printk(KERN_INFO "macio: fixed left ide irqs\n");
290 static void macio_setup_interrupts(struct macio_dev *dev)
292 struct device_node *np = dev->ofdev.node;
297 struct resource *res = &dev->interrupt[j];
299 if (j >= MACIO_DEV_COUNT_IRQS)
301 irq = irq_of_parse_and_map(np, i++);
305 res->flags = IORESOURCE_IRQ;
306 res->name = dev->ofdev.dev.bus_id;
307 if (macio_resource_quirks(np, res, i - 1)) {
308 memset(res, 0, sizeof(struct resource));
313 dev->n_interrupts = j;
316 static void macio_setup_resources(struct macio_dev *dev,
317 struct resource *parent_res)
319 struct device_node *np = dev->ofdev.node;
323 for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
324 struct resource *res = &dev->resource[index];
325 if (index >= MACIO_DEV_COUNT_RESOURCES)
328 res->name = dev->ofdev.dev.bus_id;
330 if (macio_resource_quirks(np, res, index)) {
331 memset(res, 0, sizeof(struct resource));
334 /* Currently, we consider failure as harmless, this may
335 * change in the future, once I've found all the device
336 * tree bugs in older machines & worked around them
338 if (insert_resource(parent_res, res)) {
339 printk(KERN_WARNING "Can't request resource "
340 "%d for MacIO device %s\n",
341 index, dev->ofdev.dev.bus_id);
344 dev->n_resources = index;
348 * macio_add_one_device - Add one device from OF node to the device tree
349 * @chip: pointer to the macio_chip holding the device
350 * @np: pointer to the device node in the OF tree
351 * @in_bay: set to 1 if device is part of a media-bay
353 * When media-bay is changed to hotswap drivers, this function will
354 * be exposed to the bay driver some way...
356 static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
357 struct device *parent,
358 struct device_node *np,
359 struct macio_dev *in_bay,
360 struct resource *parent_res)
362 struct macio_dev *dev;
368 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
372 dev->bus = &chip->lbus;
373 dev->media_bay = in_bay;
374 dev->ofdev.node = np;
375 dev->ofdev.dma_mask = 0xffffffffUL;
376 dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask;
377 dev->ofdev.dev.parent = parent;
378 dev->ofdev.dev.bus = &macio_bus_type;
379 dev->ofdev.dev.release = macio_release_dev;
382 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
383 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
386 /* MacIO itself has a different reg, we use it's PCI base */
387 if (np == chip->of_node) {
388 sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s",
391 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
393 0, /* NuBus may want to do something better here */
395 MAX_NODE_NAME_SIZE, np->name);
397 reg = of_get_property(np, "reg", NULL);
398 sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s",
400 reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
403 /* Setup interrupts & resources */
404 macio_setup_interrupts(dev);
405 macio_setup_resources(dev, parent_res);
406 macio_add_missing_resources(dev);
408 /* Register with core */
409 if (of_device_register(&dev->ofdev) != 0) {
410 printk(KERN_DEBUG"macio: device registration error for %s!\n",
411 dev->ofdev.dev.bus_id);
419 static int macio_skip_device(struct device_node *np)
421 if (strncmp(np->name, "battery", 7) == 0)
423 if (strncmp(np->name, "escc-legacy", 11) == 0)
429 * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
430 * @chip: pointer to the macio_chip holding the devices
432 * This function will do the job of extracting devices from the
433 * Open Firmware device tree, build macio_dev structures and add
434 * them to the Linux device tree.
436 * For now, childs of media-bay are added now as well. This will
439 static void macio_pci_add_devices(struct macio_chip *chip)
441 struct device_node *np, *pnode;
442 struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
443 struct device *parent = NULL;
444 struct resource *root_res = &iomem_resource;
446 /* Add a node for the macio bus itself */
448 if (chip->lbus.pdev) {
449 parent = &chip->lbus.pdev->dev;
450 root_res = &chip->lbus.pdev->resource[0];
453 pnode = of_node_get(chip->of_node);
457 /* Add macio itself to hierarchy */
458 rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
461 root_res = &rdev->resource[0];
463 /* First scan 1st level */
464 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
465 if (macio_skip_device(np))
468 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
472 else if (strncmp(np->name, "media-bay", 9) == 0)
474 else if (strncmp(np->name, "escc", 4) == 0)
478 /* Add media bay devices if any */
480 for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np))
482 if (macio_skip_device(np))
485 if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
486 mbdev, root_res) == NULL)
490 /* Add serial ports if any */
492 for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np))
494 if (macio_skip_device(np))
497 if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
498 NULL, root_res) == NULL)
506 * macio_register_driver - Registers a new MacIO device driver
507 * @drv: pointer to the driver definition structure
509 int macio_register_driver(struct macio_driver *drv)
511 /* initialize common driver fields */
512 drv->driver.name = drv->name;
513 drv->driver.bus = &macio_bus_type;
515 /* register with core */
516 return driver_register(&drv->driver);
520 * macio_unregister_driver - Unregisters a new MacIO device driver
521 * @drv: pointer to the driver definition structure
523 void macio_unregister_driver(struct macio_driver *drv)
525 driver_unregister(&drv->driver);
529 * macio_request_resource - Request an MMIO resource
530 * @dev: pointer to the device holding the resource
531 * @resource_no: resource number to request
532 * @name: resource name
534 * Mark memory region number @resource_no associated with MacIO
535 * device @dev as being reserved by owner @name. Do not access
536 * any address inside the memory regions unless this call returns
539 * Returns 0 on success, or %EBUSY on error. A warning
540 * message is also printed on failure.
542 int macio_request_resource(struct macio_dev *dev, int resource_no,
545 if (macio_resource_len(dev, resource_no) == 0)
548 if (!request_mem_region(macio_resource_start(dev, resource_no),
549 macio_resource_len(dev, resource_no),
556 printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
559 macio_resource_len(dev, resource_no),
560 macio_resource_start(dev, resource_no),
561 dev->ofdev.dev.bus_id);
566 * macio_release_resource - Release an MMIO resource
567 * @dev: pointer to the device holding the resource
568 * @resource_no: resource number to release
570 void macio_release_resource(struct macio_dev *dev, int resource_no)
572 if (macio_resource_len(dev, resource_no) == 0)
574 release_mem_region(macio_resource_start(dev, resource_no),
575 macio_resource_len(dev, resource_no));
579 * macio_request_resources - Reserve all memory resources
580 * @dev: MacIO device whose resources are to be reserved
581 * @name: Name to be associated with resource.
583 * Mark all memory regions associated with MacIO device @dev as
584 * being reserved by owner @name. Do not access any address inside
585 * the memory regions unless this call returns successfully.
587 * Returns 0 on success, or %EBUSY on error. A warning
588 * message is also printed on failure.
590 int macio_request_resources(struct macio_dev *dev, const char *name)
594 for (i = 0; i < dev->n_resources; i++)
595 if (macio_request_resource(dev, i, name))
601 macio_release_resource(dev, i);
607 * macio_release_resources - Release reserved memory resources
608 * @dev: MacIO device whose resources were previously reserved
611 void macio_release_resources(struct macio_dev *dev)
615 for (i = 0; i < dev->n_resources; i++)
616 macio_release_resource(dev, i);
622 static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
624 struct device_node* np;
625 struct macio_chip* chip;
627 if (ent->vendor != PCI_VENDOR_ID_APPLE)
630 /* Note regarding refcounting: We assume pci_device_to_OF_node() is
631 * ported to new OF APIs and returns a node with refcount incremented.
633 np = pci_device_to_OF_node(pdev);
637 /* The above assumption is wrong !!!
638 * fix that here for now until I fix the arch code
642 /* We also assume that pmac_feature will have done a get() on nodes
643 * stored in the macio chips array
645 chip = macio_find(np, macio_unknown);
650 /* XXX Need locking ??? */
651 if (chip->lbus.pdev == NULL) {
652 chip->lbus.pdev = pdev;
653 chip->lbus.chip = chip;
654 pci_set_drvdata(pdev, &chip->lbus);
655 pci_set_master(pdev);
658 printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
662 * HACK ALERT: The WallStreet PowerBook and some OHare based machines
663 * have 2 macio ASICs. I must probe the "main" one first or IDE
664 * ordering will be incorrect. So I put on "hold" the second one since
665 * it seem to appear first on PCI
667 if (chip->type == macio_gatwick || chip->type == macio_ohareII)
668 if (macio_chips[0].lbus.pdev == NULL) {
669 macio_on_hold = chip;
673 macio_pci_add_devices(chip);
674 if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
675 macio_pci_add_devices(macio_on_hold);
676 macio_on_hold = NULL;
682 static void __devexit macio_pci_remove(struct pci_dev* pdev)
684 panic("removing of macio-asic not supported !\n");
688 * MacIO is matched against any Apple ID, it's probe() function
689 * will then decide wether it applies or not
691 static const struct pci_device_id __devinitdata pci_ids [] = { {
692 .vendor = PCI_VENDOR_ID_APPLE,
693 .device = PCI_ANY_ID,
694 .subvendor = PCI_ANY_ID,
695 .subdevice = PCI_ANY_ID,
697 }, { /* end: all zeroes */ }
699 MODULE_DEVICE_TABLE (pci, pci_ids);
701 /* pci driver glue; this is a "new style" PCI driver module */
702 static struct pci_driver macio_pci_driver = {
703 .name = (char *) "macio",
706 .probe = macio_pci_probe,
707 .remove = macio_pci_remove,
710 #endif /* CONFIG_PCI */
712 static int __init macio_module_init (void)
717 rc = pci_register_driver(&macio_pci_driver);
720 #endif /* CONFIG_PCI */
724 module_init(macio_module_init);
726 EXPORT_SYMBOL(macio_register_driver);
727 EXPORT_SYMBOL(macio_unregister_driver);
728 EXPORT_SYMBOL(macio_dev_get);
729 EXPORT_SYMBOL(macio_dev_put);
730 EXPORT_SYMBOL(macio_request_resource);
731 EXPORT_SYMBOL(macio_release_resource);
732 EXPORT_SYMBOL(macio_request_resources);
733 EXPORT_SYMBOL(macio_release_resources);