blob: c96b7fe882a450ccfaae4d9fe8c6d0c084077876 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Bus & driver management routines for devices within
3 * a MacIO ASIC. Interface to new driver model mostly
4 * stolen from the PCI version.
5 *
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +11006 * Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
7 *
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.
12 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 * TODO:
14 *
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
17 * sub-devices.
18 */
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#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>
Tim Schmielau4e57b682005-10-30 15:03:48 -080026#include <linux/slab.h>
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <asm/machdep.h>
29#include <asm/macio.h>
30#include <asm/pmac_feature.h>
31#include <asm/prom.h>
32#include <asm/pci-bridge.h>
33
34#undef DEBUG
35
36#define MAX_NODE_NAME_SIZE (BUS_ID_SIZE - 12)
37
38static struct macio_chip *macio_on_hold;
39
40static int macio_bus_match(struct device *dev, struct device_driver *drv)
41{
42 struct macio_dev * macio_dev = to_macio_device(dev);
43 struct macio_driver * macio_drv = to_macio_driver(drv);
Jeff Mahoney5e655772005-07-06 15:44:41 -040044 const struct of_device_id * matches = macio_drv->match_table;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46 if (!matches)
47 return 0;
48
49 return of_match_device(matches, &macio_dev->ofdev) != NULL;
50}
51
52struct macio_dev *macio_dev_get(struct macio_dev *dev)
53{
54 struct device *tmp;
55
56 if (!dev)
57 return NULL;
58 tmp = get_device(&dev->ofdev.dev);
59 if (tmp)
60 return to_macio_device(tmp);
61 else
62 return NULL;
63}
64
65void macio_dev_put(struct macio_dev *dev)
66{
67 if (dev)
68 put_device(&dev->ofdev.dev);
69}
70
71
72static int macio_device_probe(struct device *dev)
73{
74 int error = -ENODEV;
75 struct macio_driver *drv;
76 struct macio_dev *macio_dev;
Jeff Mahoney5e655772005-07-06 15:44:41 -040077 const struct of_device_id *match;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79 drv = to_macio_driver(dev->driver);
80 macio_dev = to_macio_device(dev);
81
82 if (!drv->probe)
83 return error;
84
85 macio_dev_get(macio_dev);
86
87 match = of_match_device(drv->match_table, &macio_dev->ofdev);
88 if (match)
89 error = drv->probe(macio_dev, match);
90 if (error)
91 macio_dev_put(macio_dev);
92
93 return error;
94}
95
96static int macio_device_remove(struct device *dev)
97{
98 struct macio_dev * macio_dev = to_macio_device(dev);
99 struct macio_driver * drv = to_macio_driver(dev->driver);
100
101 if (dev->driver && drv->remove)
102 drv->remove(macio_dev);
103 macio_dev_put(macio_dev);
104
105 return 0;
106}
107
108static void macio_device_shutdown(struct device *dev)
109{
110 struct macio_dev * macio_dev = to_macio_device(dev);
111 struct macio_driver * drv = to_macio_driver(dev->driver);
112
113 if (dev->driver && drv->shutdown)
114 drv->shutdown(macio_dev);
115}
116
Pavel Machekf4513902005-04-16 15:25:32 -0700117static int macio_device_suspend(struct device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
119 struct macio_dev * macio_dev = to_macio_device(dev);
120 struct macio_driver * drv = to_macio_driver(dev->driver);
121
122 if (dev->driver && drv->suspend)
123 return drv->suspend(macio_dev, state);
124 return 0;
125}
126
127static int macio_device_resume(struct device * dev)
128{
129 struct macio_dev * macio_dev = to_macio_device(dev);
130 struct macio_driver * drv = to_macio_driver(dev->driver);
131
132 if (dev->driver && drv->resume)
133 return drv->resume(macio_dev);
134 return 0;
135}
136
Jeff Mahoneyb5bf5b62005-07-06 15:26:27 -0400137extern struct device_attribute macio_dev_attrs[];
138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139struct bus_type macio_bus_type = {
140 .name = "macio",
141 .match = macio_bus_match,
Sylvain Munautcc116452007-02-12 23:13:26 +0100142 .uevent = of_device_uevent,
Russell King4866b122006-01-05 14:39:24 +0000143 .probe = macio_device_probe,
144 .remove = macio_device_remove,
145 .shutdown = macio_device_shutdown,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 .suspend = macio_device_suspend,
147 .resume = macio_device_resume,
Jeff Mahoneyb5bf5b62005-07-06 15:26:27 -0400148 .dev_attrs = macio_dev_attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149};
150
151static int __init macio_bus_driver_init(void)
152{
153 return bus_register(&macio_bus_type);
154}
155
156postcore_initcall(macio_bus_driver_init);
157
158
159/**
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100160 * macio_release_dev - free a macio device structure when all users of it are
161 * finished.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 * @dev: device that's been disconnected
163 *
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100164 * 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
167 * implementation.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 */
169static void macio_release_dev(struct device *dev)
170{
171 struct macio_dev *mdev;
172
173 mdev = to_macio_device(dev);
174 kfree(mdev);
175}
176
177/**
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
182 *
183 * If this routine returns non-null, then the resource is completely
184 * skipped.
185 */
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100186static int macio_resource_quirks(struct device_node *np, struct resource *res,
187 int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188{
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000189 /* Only quirks for memory resources for now */
190 if ((res->flags & IORESOURCE_MEM) == 0)
191 return 0;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100192
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000193 /* Grand Central has too large resource 0 on some machines */
194 if (index == 0 && !strcmp(np->name, "gc"))
195 res->end = res->start + 0x1ffff;
196
197 /* Airport has bogus resource 2 */
198 if (index >= 2 && !strcmp(np->name, "radio"))
199 return 1;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100200
201#ifndef CONFIG_PPC64
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000202 /* DBDMAs may have bogus sizes */
203 if ((res->start & 0x0001f000) == 0x00008000)
204 res->end = res->start + 0xff;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100205#endif /* CONFIG_PPC64 */
206
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000207 /* ESCC parent eats child resources. We could have added a
208 * level of hierarchy, but I don't really feel the need
209 * for it
210 */
211 if (!strcmp(np->name, "escc"))
212 return 1;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100213
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000214 /* ESCC has bogus resources >= 3 */
215 if (index >= 3 && !(strcmp(np->name, "ch-a") &&
216 strcmp(np->name, "ch-b")))
217 return 1;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100218
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000219 /* Media bay has too many resources, keep only first one */
220 if (index > 0 && !strcmp(np->name, "media-bay"))
221 return 1;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100222
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000223 /* 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 }
231 return 0;
232}
233
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000234static void macio_create_fixup_irq(struct macio_dev *dev, int index,
235 unsigned int line)
236{
237 unsigned int irq;
238
Benjamin Herrenschmidt6e99e452006-07-10 04:44:42 -0700239 irq = irq_create_mapping(NULL, line);
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000240 if (irq != NO_IRQ) {
241 dev->interrupt[index].start = irq;
242 dev->interrupt[index].flags = IORESOURCE_IRQ;
243 dev->interrupt[index].name = dev->ofdev.dev.bus_id;
244 }
245 if (dev->n_interrupts <= index)
246 dev->n_interrupts = index + 1;
247}
248
249static void macio_add_missing_resources(struct macio_dev *dev)
250{
251 struct device_node *np = dev->ofdev.node;
252 unsigned int irq_base;
253
254 /* Gatwick has some missing interrupts on child nodes */
255 if (dev->bus->chip->type != macio_gatwick)
256 return;
257
258 /* irq_base is always 64 on gatwick. I have no cleaner way to get
259 * that value from here at this point
260 */
261 irq_base = 64;
262
263 /* Fix SCC */
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");
269 }
270
271 /* Fix media-bay */
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");
275 }
276
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");
282 }
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");
287 }
288}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100290static void macio_setup_interrupts(struct macio_dev *dev)
291{
292 struct device_node *np = dev->ofdev.node;
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000293 unsigned int irq;
294 int i = 0, j = 0;
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100295
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000296 for (;;) {
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100297 struct resource *res = &dev->interrupt[j];
298
299 if (j >= MACIO_DEV_COUNT_IRQS)
300 break;
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000301 irq = irq_of_parse_and_map(np, i++);
302 if (irq == NO_IRQ)
303 break;
304 res->start = irq;
305 res->flags = IORESOURCE_IRQ;
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100306 res->name = dev->ofdev.dev.bus_id;
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000307 if (macio_resource_quirks(np, res, i - 1)) {
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100308 memset(res, 0, sizeof(struct resource));
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000309 continue;
310 } else
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100311 j++;
312 }
313 dev->n_interrupts = j;
314}
315
316static void macio_setup_resources(struct macio_dev *dev,
317 struct resource *parent_res)
318{
319 struct device_node *np = dev->ofdev.node;
Benjamin Herrenschmidtd2dd4822005-11-30 16:57:28 +1100320 struct resource r;
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100321 int index;
322
Benjamin Herrenschmidtd2dd4822005-11-30 16:57:28 +1100323 for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100324 struct resource *res = &dev->resource[index];
325 if (index >= MACIO_DEV_COUNT_RESOURCES)
326 break;
Benjamin Herrenschmidtd2dd4822005-11-30 16:57:28 +1100327 *res = r;
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100328 res->name = dev->ofdev.dev.bus_id;
329
330 if (macio_resource_quirks(np, res, index)) {
331 memset(res, 0, sizeof(struct resource));
332 continue;
333 }
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
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100337 */
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100338 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);
342 }
343 }
344 dev->n_resources = index;
345}
346
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347/**
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
352 *
353 * When media-bay is changed to hotswap drivers, this function will
354 * be exposed to the bay driver some way...
355 */
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100356static 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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 struct resource *parent_res)
361{
362 struct macio_dev *dev;
Jeremy Kerr018a3d12006-07-12 15:40:29 +1000363 const u32 *reg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365 if (np == NULL)
366 return NULL;
367
368 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
369 if (!dev)
370 return NULL;
371 memset(dev, 0, sizeof(*dev));
372
373 dev->bus = &chip->lbus;
374 dev->media_bay = in_bay;
375 dev->ofdev.node = np;
376 dev->ofdev.dma_mask = 0xffffffffUL;
377 dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask;
378 dev->ofdev.dev.parent = parent;
379 dev->ofdev.dev.bus = &macio_bus_type;
380 dev->ofdev.dev.release = macio_release_dev;
381
382#ifdef DEBUG
383 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
384 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
385#endif
386
387 /* MacIO itself has a different reg, we use it's PCI base */
388 if (np == chip->of_node) {
Benjamin Herrenschmidtd63fb6c2006-07-02 11:55:03 +1000389 sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s",
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100390 chip->lbus.index,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391#ifdef CONFIG_PCI
Benjamin Herrenschmidtd63fb6c2006-07-02 11:55:03 +1000392 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393#else
394 0, /* NuBus may want to do something better here */
395#endif
396 MAX_NODE_NAME_SIZE, np->name);
397 } else {
Stephen Rothwell01b27262007-04-27 13:41:15 +1000398 reg = of_get_property(np, "reg", NULL);
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100399 sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s",
400 chip->lbus.index,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
402 }
403
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100404 /* Setup interrupts & resources */
405 macio_setup_interrupts(dev);
406 macio_setup_resources(dev, parent_res);
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000407 macio_add_missing_resources(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100409 /* Register with core */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 if (of_device_register(&dev->ofdev) != 0) {
411 printk(KERN_DEBUG"macio: device registration error for %s!\n",
412 dev->ofdev.dev.bus_id);
413 kfree(dev);
414 return NULL;
415 }
416
417 return dev;
418}
419
420static int macio_skip_device(struct device_node *np)
421{
422 if (strncmp(np->name, "battery", 7) == 0)
423 return 1;
424 if (strncmp(np->name, "escc-legacy", 11) == 0)
425 return 1;
426 return 0;
427}
428
429/**
430 * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
431 * @chip: pointer to the macio_chip holding the devices
432 *
433 * This function will do the job of extracting devices from the
434 * Open Firmware device tree, build macio_dev structures and add
435 * them to the Linux device tree.
436 *
437 * For now, childs of media-bay are added now as well. This will
438 * change rsn though.
439 */
440static void macio_pci_add_devices(struct macio_chip *chip)
441{
442 struct device_node *np, *pnode;
443 struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
444 struct device *parent = NULL;
445 struct resource *root_res = &iomem_resource;
446
447 /* Add a node for the macio bus itself */
448#ifdef CONFIG_PCI
449 if (chip->lbus.pdev) {
450 parent = &chip->lbus.pdev->dev;
451 root_res = &chip->lbus.pdev->resource[0];
452 }
453#endif
454 pnode = of_node_get(chip->of_node);
455 if (pnode == NULL)
456 return;
457
458 /* Add macio itself to hierarchy */
459 rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
460 if (rdev == NULL)
461 return;
462 root_res = &rdev->resource[0];
463
464 /* First scan 1st level */
465 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100466 if (macio_skip_device(np))
467 continue;
468 of_node_get(np);
469 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
470 root_res);
471 if (mdev == NULL)
472 of_node_put(np);
473 else if (strncmp(np->name, "media-bay", 9) == 0)
474 mbdev = mdev;
475 else if (strncmp(np->name, "escc", 4) == 0)
476 sdev = mdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 }
478
479 /* Add media bay devices if any */
480 if (mbdev)
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100481 for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np))
482 != NULL;) {
483 if (macio_skip_device(np))
484 continue;
485 of_node_get(np);
486 if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
487 mbdev, root_res) == NULL)
488 of_node_put(np);
489 }
490
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 /* Add serial ports if any */
492 if (sdev) {
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100493 for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np))
494 != NULL;) {
495 if (macio_skip_device(np))
496 continue;
497 of_node_get(np);
498 if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
499 NULL, root_res) == NULL)
500 of_node_put(np);
501 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 }
503}
504
505
506/**
507 * macio_register_driver - Registers a new MacIO device driver
508 * @drv: pointer to the driver definition structure
509 */
510int macio_register_driver(struct macio_driver *drv)
511{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 /* initialize common driver fields */
513 drv->driver.name = drv->name;
514 drv->driver.bus = &macio_bus_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
516 /* register with core */
Bjorn Helgaasd56a3e32006-03-21 23:20:28 -0800517 return driver_register(&drv->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518}
519
520/**
521 * macio_unregister_driver - Unregisters a new MacIO device driver
522 * @drv: pointer to the driver definition structure
523 */
524void macio_unregister_driver(struct macio_driver *drv)
525{
526 driver_unregister(&drv->driver);
527}
528
529/**
530 * macio_request_resource - Request an MMIO resource
531 * @dev: pointer to the device holding the resource
532 * @resource_no: resource number to request
533 * @name: resource name
534 *
535 * Mark memory region number @resource_no associated with MacIO
536 * device @dev as being reserved by owner @name. Do not access
537 * any address inside the memory regions unless this call returns
538 * successfully.
539 *
540 * Returns 0 on success, or %EBUSY on error. A warning
541 * message is also printed on failure.
542 */
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100543int macio_request_resource(struct macio_dev *dev, int resource_no,
544 const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545{
546 if (macio_resource_len(dev, resource_no) == 0)
547 return 0;
548
549 if (!request_mem_region(macio_resource_start(dev, resource_no),
550 macio_resource_len(dev, resource_no),
551 name))
552 goto err_out;
553
554 return 0;
555
556err_out:
557 printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
558 " for device %s\n",
559 resource_no,
560 macio_resource_len(dev, resource_no),
561 macio_resource_start(dev, resource_no),
562 dev->ofdev.dev.bus_id);
563 return -EBUSY;
564}
565
566/**
567 * macio_release_resource - Release an MMIO resource
568 * @dev: pointer to the device holding the resource
569 * @resource_no: resource number to release
570 */
571void macio_release_resource(struct macio_dev *dev, int resource_no)
572{
573 if (macio_resource_len(dev, resource_no) == 0)
574 return;
575 release_mem_region(macio_resource_start(dev, resource_no),
576 macio_resource_len(dev, resource_no));
577}
578
579/**
580 * macio_request_resources - Reserve all memory resources
581 * @dev: MacIO device whose resources are to be reserved
582 * @name: Name to be associated with resource.
583 *
584 * Mark all memory regions associated with MacIO device @dev as
585 * being reserved by owner @name. Do not access any address inside
586 * the memory regions unless this call returns successfully.
587 *
588 * Returns 0 on success, or %EBUSY on error. A warning
589 * message is also printed on failure.
590 */
591int macio_request_resources(struct macio_dev *dev, const char *name)
592{
593 int i;
594
595 for (i = 0; i < dev->n_resources; i++)
596 if (macio_request_resource(dev, i, name))
597 goto err_out;
598 return 0;
599
600err_out:
601 while(--i >= 0)
602 macio_release_resource(dev, i);
603
604 return -EBUSY;
605}
606
607/**
608 * macio_release_resources - Release reserved memory resources
609 * @dev: MacIO device whose resources were previously reserved
610 */
611
612void macio_release_resources(struct macio_dev *dev)
613{
614 int i;
615
616 for (i = 0; i < dev->n_resources; i++)
617 macio_release_resource(dev, i);
618}
619
620
621#ifdef CONFIG_PCI
622
623static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
624{
625 struct device_node* np;
626 struct macio_chip* chip;
627
628 if (ent->vendor != PCI_VENDOR_ID_APPLE)
629 return -ENODEV;
630
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100631 /* Note regarding refcounting: We assume pci_device_to_OF_node() is
632 * ported to new OF APIs and returns a node with refcount incremented.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 */
634 np = pci_device_to_OF_node(pdev);
635 if (np == NULL)
636 return -ENODEV;
637
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100638 /* The above assumption is wrong !!!
639 * fix that here for now until I fix the arch code
640 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 of_node_get(np);
642
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100643 /* We also assume that pmac_feature will have done a get() on nodes
644 * stored in the macio chips array
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 */
646 chip = macio_find(np, macio_unknown);
647 of_node_put(np);
648 if (chip == NULL)
649 return -ENODEV;
650
651 /* XXX Need locking ??? */
652 if (chip->lbus.pdev == NULL) {
653 chip->lbus.pdev = pdev;
654 chip->lbus.chip = chip;
655 pci_set_drvdata(pdev, &chip->lbus);
656 pci_set_master(pdev);
657 }
658
659 printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
660 chip->name);
661
662 /*
663 * HACK ALERT: The WallStreet PowerBook and some OHare based machines
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100664 * have 2 macio ASICs. I must probe the "main" one first or IDE
665 * ordering will be incorrect. So I put on "hold" the second one since
666 * it seem to appear first on PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 */
668 if (chip->type == macio_gatwick || chip->type == macio_ohareII)
669 if (macio_chips[0].lbus.pdev == NULL) {
670 macio_on_hold = chip;
671 return 0;
672 }
673
674 macio_pci_add_devices(chip);
675 if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
676 macio_pci_add_devices(macio_on_hold);
677 macio_on_hold = NULL;
678 }
679
680 return 0;
681}
682
683static void __devexit macio_pci_remove(struct pci_dev* pdev)
684{
685 panic("removing of macio-asic not supported !\n");
686}
687
688/*
689 * MacIO is matched against any Apple ID, it's probe() function
690 * will then decide wether it applies or not
691 */
692static const struct pci_device_id __devinitdata pci_ids [] = { {
693 .vendor = PCI_VENDOR_ID_APPLE,
694 .device = PCI_ANY_ID,
695 .subvendor = PCI_ANY_ID,
696 .subdevice = PCI_ANY_ID,
697
698 }, { /* end: all zeroes */ }
699};
700MODULE_DEVICE_TABLE (pci, pci_ids);
701
702/* pci driver glue; this is a "new style" PCI driver module */
703static struct pci_driver macio_pci_driver = {
704 .name = (char *) "macio",
705 .id_table = pci_ids,
706
707 .probe = macio_pci_probe,
708 .remove = macio_pci_remove,
709};
710
711#endif /* CONFIG_PCI */
712
713static int __init macio_module_init (void)
714{
715#ifdef CONFIG_PCI
716 int rc;
717
718 rc = pci_register_driver(&macio_pci_driver);
719 if (rc)
720 return rc;
721#endif /* CONFIG_PCI */
722 return 0;
723}
724
725module_init(macio_module_init);
726
727EXPORT_SYMBOL(macio_register_driver);
728EXPORT_SYMBOL(macio_unregister_driver);
729EXPORT_SYMBOL(macio_dev_get);
730EXPORT_SYMBOL(macio_dev_put);
731EXPORT_SYMBOL(macio_request_resource);
732EXPORT_SYMBOL(macio_release_resource);
733EXPORT_SYMBOL(macio_request_resources);
734EXPORT_SYMBOL(macio_release_resources);