Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
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 | * | |
2c5bd01f BH |
6 | * 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 | * | |
1da177e4 LT |
13 | * 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 | ||
20 | #include <linux/config.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/pci.h> | |
24 | #include <linux/pci_ids.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/module.h> | |
4e57b681 TS |
27 | #include <linux/slab.h> |
28 | ||
1da177e4 LT |
29 | #include <asm/machdep.h> |
30 | #include <asm/macio.h> | |
31 | #include <asm/pmac_feature.h> | |
32 | #include <asm/prom.h> | |
33 | #include <asm/pci-bridge.h> | |
34 | ||
35 | #undef DEBUG | |
36 | ||
37 | #define MAX_NODE_NAME_SIZE (BUS_ID_SIZE - 12) | |
38 | ||
39 | static struct macio_chip *macio_on_hold; | |
40 | ||
41 | static int macio_bus_match(struct device *dev, struct device_driver *drv) | |
42 | { | |
43 | struct macio_dev * macio_dev = to_macio_device(dev); | |
44 | struct macio_driver * macio_drv = to_macio_driver(drv); | |
5e655772 | 45 | const struct of_device_id * matches = macio_drv->match_table; |
1da177e4 LT |
46 | |
47 | if (!matches) | |
48 | return 0; | |
49 | ||
50 | return of_match_device(matches, &macio_dev->ofdev) != NULL; | |
51 | } | |
52 | ||
53 | struct macio_dev *macio_dev_get(struct macio_dev *dev) | |
54 | { | |
55 | struct device *tmp; | |
56 | ||
57 | if (!dev) | |
58 | return NULL; | |
59 | tmp = get_device(&dev->ofdev.dev); | |
60 | if (tmp) | |
61 | return to_macio_device(tmp); | |
62 | else | |
63 | return NULL; | |
64 | } | |
65 | ||
66 | void macio_dev_put(struct macio_dev *dev) | |
67 | { | |
68 | if (dev) | |
69 | put_device(&dev->ofdev.dev); | |
70 | } | |
71 | ||
72 | ||
73 | static int macio_device_probe(struct device *dev) | |
74 | { | |
75 | int error = -ENODEV; | |
76 | struct macio_driver *drv; | |
77 | struct macio_dev *macio_dev; | |
5e655772 | 78 | const struct of_device_id *match; |
1da177e4 LT |
79 | |
80 | drv = to_macio_driver(dev->driver); | |
81 | macio_dev = to_macio_device(dev); | |
82 | ||
83 | if (!drv->probe) | |
84 | return error; | |
85 | ||
86 | macio_dev_get(macio_dev); | |
87 | ||
88 | match = of_match_device(drv->match_table, &macio_dev->ofdev); | |
89 | if (match) | |
90 | error = drv->probe(macio_dev, match); | |
91 | if (error) | |
92 | macio_dev_put(macio_dev); | |
93 | ||
94 | return error; | |
95 | } | |
96 | ||
97 | static int macio_device_remove(struct device *dev) | |
98 | { | |
99 | struct macio_dev * macio_dev = to_macio_device(dev); | |
100 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
101 | ||
102 | if (dev->driver && drv->remove) | |
103 | drv->remove(macio_dev); | |
104 | macio_dev_put(macio_dev); | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static void macio_device_shutdown(struct device *dev) | |
110 | { | |
111 | struct macio_dev * macio_dev = to_macio_device(dev); | |
112 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
113 | ||
114 | if (dev->driver && drv->shutdown) | |
115 | drv->shutdown(macio_dev); | |
116 | } | |
117 | ||
f4513904 | 118 | static int macio_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 LT |
119 | { |
120 | struct macio_dev * macio_dev = to_macio_device(dev); | |
121 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
122 | ||
123 | if (dev->driver && drv->suspend) | |
124 | return drv->suspend(macio_dev, state); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static int macio_device_resume(struct device * dev) | |
129 | { | |
130 | struct macio_dev * macio_dev = to_macio_device(dev); | |
131 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
132 | ||
133 | if (dev->driver && drv->resume) | |
134 | return drv->resume(macio_dev); | |
135 | return 0; | |
136 | } | |
137 | ||
312c004d | 138 | static int macio_uevent(struct device *dev, char **envp, int num_envp, |
184f6eb8 JM |
139 | char *buffer, int buffer_size) |
140 | { | |
141 | struct macio_dev * macio_dev; | |
142 | struct of_device * of; | |
143 | char *scratch, *compat; | |
144 | int i = 0; | |
145 | int length = 0; | |
146 | int cplen, seen = 0; | |
147 | ||
148 | if (!dev) | |
149 | return -ENODEV; | |
150 | ||
151 | macio_dev = to_macio_device(dev); | |
152 | if (!macio_dev) | |
153 | return -ENODEV; | |
154 | ||
155 | of = &macio_dev->ofdev; | |
156 | scratch = buffer; | |
157 | ||
158 | /* stuff we want to pass to /sbin/hotplug */ | |
159 | envp[i++] = scratch; | |
160 | length += scnprintf (scratch, buffer_size - length, "OF_NAME=%s", | |
161 | of->node->name); | |
162 | if ((buffer_size - length <= 0) || (i >= num_envp)) | |
163 | return -ENOMEM; | |
164 | ++length; | |
165 | scratch += length; | |
166 | ||
167 | envp[i++] = scratch; | |
168 | length += scnprintf (scratch, buffer_size - length, "OF_TYPE=%s", | |
169 | of->node->type); | |
170 | if ((buffer_size - length <= 0) || (i >= num_envp)) | |
171 | return -ENOMEM; | |
172 | ++length; | |
173 | scratch += length; | |
174 | ||
175 | /* Since the compatible field can contain pretty much anything | |
176 | * it's not really legal to split it out with commas. We split it | |
177 | * up using a number of environment variables instead. */ | |
178 | ||
179 | compat = (char *) get_property(of->node, "compatible", &cplen); | |
180 | while (compat && cplen > 0) { | |
181 | int l; | |
182 | envp[i++] = scratch; | |
183 | length += scnprintf (scratch, buffer_size - length, | |
184 | "OF_COMPATIBLE_%d=%s", seen, compat); | |
185 | if ((buffer_size - length <= 0) || (i >= num_envp)) | |
186 | return -ENOMEM; | |
187 | length++; | |
188 | scratch += length; | |
189 | l = strlen (compat) + 1; | |
190 | compat += l; | |
191 | cplen -= l; | |
192 | seen++; | |
193 | } | |
194 | ||
195 | envp[i++] = scratch; | |
196 | length += scnprintf (scratch, buffer_size - length, | |
197 | "OF_COMPATIBLE_N=%d", seen); | |
198 | if ((buffer_size - length <= 0) || (i >= num_envp)) | |
199 | return -ENOMEM; | |
200 | ++length; | |
201 | scratch += length; | |
202 | ||
203 | envp[i] = NULL; | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
b5bf5b67 JM |
208 | extern struct device_attribute macio_dev_attrs[]; |
209 | ||
1da177e4 LT |
210 | struct bus_type macio_bus_type = { |
211 | .name = "macio", | |
212 | .match = macio_bus_match, | |
312c004d | 213 | .uevent = macio_uevent, |
4866b124 RK |
214 | .probe = macio_device_probe, |
215 | .remove = macio_device_remove, | |
216 | .shutdown = macio_device_shutdown, | |
1da177e4 LT |
217 | .suspend = macio_device_suspend, |
218 | .resume = macio_device_resume, | |
b5bf5b67 | 219 | .dev_attrs = macio_dev_attrs, |
1da177e4 LT |
220 | }; |
221 | ||
222 | static int __init macio_bus_driver_init(void) | |
223 | { | |
224 | return bus_register(&macio_bus_type); | |
225 | } | |
226 | ||
227 | postcore_initcall(macio_bus_driver_init); | |
228 | ||
229 | ||
230 | /** | |
2c5bd01f BH |
231 | * macio_release_dev - free a macio device structure when all users of it are |
232 | * finished. | |
1da177e4 LT |
233 | * @dev: device that's been disconnected |
234 | * | |
2c5bd01f BH |
235 | * Will be called only by the device core when all users of this macio device |
236 | * are done. This currently means never as we don't hot remove any macio | |
237 | * device yet, though that will happen with mediabay based devices in a later | |
238 | * implementation. | |
1da177e4 LT |
239 | */ |
240 | static void macio_release_dev(struct device *dev) | |
241 | { | |
242 | struct macio_dev *mdev; | |
243 | ||
244 | mdev = to_macio_device(dev); | |
245 | kfree(mdev); | |
246 | } | |
247 | ||
248 | /** | |
249 | * macio_resource_quirks - tweak or skip some resources for a device | |
250 | * @np: pointer to the device node | |
251 | * @res: resulting resource | |
252 | * @index: index of resource in node | |
253 | * | |
254 | * If this routine returns non-null, then the resource is completely | |
255 | * skipped. | |
256 | */ | |
2c5bd01f BH |
257 | static int macio_resource_quirks(struct device_node *np, struct resource *res, |
258 | int index) | |
1da177e4 LT |
259 | { |
260 | if (res->flags & IORESOURCE_MEM) { | |
261 | /* Grand Central has too large resource 0 on some machines */ | |
cc5d0189 | 262 | if (index == 0 && !strcmp(np->name, "gc")) |
1da177e4 | 263 | res->end = res->start + 0x1ffff; |
cc5d0189 | 264 | |
1da177e4 LT |
265 | /* Airport has bogus resource 2 */ |
266 | if (index >= 2 && !strcmp(np->name, "radio")) | |
267 | return 1; | |
cc5d0189 BH |
268 | |
269 | #ifndef CONFIG_PPC64 | |
1da177e4 | 270 | /* DBDMAs may have bogus sizes */ |
cc5d0189 | 271 | if ((res->start & 0x0001f000) == 0x00008000) |
1da177e4 | 272 | res->end = res->start + 0xff; |
cc5d0189 BH |
273 | #endif /* CONFIG_PPC64 */ |
274 | ||
2c5bd01f BH |
275 | /* ESCC parent eats child resources. We could have added a |
276 | * level of hierarchy, but I don't really feel the need | |
277 | * for it | |
278 | */ | |
1da177e4 LT |
279 | if (!strcmp(np->name, "escc")) |
280 | return 1; | |
cc5d0189 | 281 | |
1da177e4 | 282 | /* ESCC has bogus resources >= 3 */ |
2c5bd01f BH |
283 | if (index >= 3 && !(strcmp(np->name, "ch-a") && |
284 | strcmp(np->name, "ch-b"))) | |
1da177e4 | 285 | return 1; |
cc5d0189 | 286 | |
1da177e4 LT |
287 | /* Media bay has too many resources, keep only first one */ |
288 | if (index > 0 && !strcmp(np->name, "media-bay")) | |
289 | return 1; | |
cc5d0189 | 290 | |
1da177e4 LT |
291 | /* Some older IDE resources have bogus sizes */ |
292 | if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") && | |
293 | strcmp(np->type, "ide") && strcmp(np->type, "ata"))) { | |
cc5d0189 | 294 | if (index == 0 && (res->end - res->start) > 0xfff) |
1da177e4 | 295 | res->end = res->start + 0xfff; |
cc5d0189 | 296 | if (index == 1 && (res->end - res->start) > 0xff) |
1da177e4 | 297 | res->end = res->start + 0xff; |
1da177e4 LT |
298 | } |
299 | } | |
300 | return 0; | |
301 | } | |
302 | ||
303 | ||
2c5bd01f BH |
304 | static void macio_setup_interrupts(struct macio_dev *dev) |
305 | { | |
306 | struct device_node *np = dev->ofdev.node; | |
307 | int i,j; | |
308 | ||
309 | /* For now, we use pre-parsed entries in the device-tree for | |
310 | * interrupt routing and addresses, but we should change that | |
311 | * to dynamically parsed entries and so get rid of most of the | |
312 | * clutter in struct device_node | |
313 | */ | |
314 | for (i = j = 0; i < np->n_intrs; i++) { | |
315 | struct resource *res = &dev->interrupt[j]; | |
316 | ||
317 | if (j >= MACIO_DEV_COUNT_IRQS) | |
318 | break; | |
319 | res->start = np->intrs[i].line; | |
320 | res->flags = IORESOURCE_IO; | |
321 | if (np->intrs[j].sense) | |
322 | res->flags |= IORESOURCE_IRQ_LOWLEVEL; | |
323 | else | |
324 | res->flags |= IORESOURCE_IRQ_HIGHEDGE; | |
325 | res->name = dev->ofdev.dev.bus_id; | |
326 | if (macio_resource_quirks(np, res, i)) | |
327 | memset(res, 0, sizeof(struct resource)); | |
328 | else | |
329 | j++; | |
330 | } | |
331 | dev->n_interrupts = j; | |
332 | } | |
333 | ||
334 | static void macio_setup_resources(struct macio_dev *dev, | |
335 | struct resource *parent_res) | |
336 | { | |
337 | struct device_node *np = dev->ofdev.node; | |
d2dd482b | 338 | struct resource r; |
2c5bd01f BH |
339 | int index; |
340 | ||
d2dd482b | 341 | for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) { |
2c5bd01f BH |
342 | struct resource *res = &dev->resource[index]; |
343 | if (index >= MACIO_DEV_COUNT_RESOURCES) | |
344 | break; | |
d2dd482b | 345 | *res = r; |
2c5bd01f BH |
346 | res->name = dev->ofdev.dev.bus_id; |
347 | ||
348 | if (macio_resource_quirks(np, res, index)) { | |
349 | memset(res, 0, sizeof(struct resource)); | |
350 | continue; | |
351 | } | |
352 | /* Currently, we consider failure as harmless, this may | |
353 | * change in the future, once I've found all the device | |
354 | * tree bugs in older machines & worked around them | |
cc5d0189 | 355 | */ |
2c5bd01f BH |
356 | if (insert_resource(parent_res, res)) { |
357 | printk(KERN_WARNING "Can't request resource " | |
358 | "%d for MacIO device %s\n", | |
359 | index, dev->ofdev.dev.bus_id); | |
360 | } | |
361 | } | |
362 | dev->n_resources = index; | |
363 | } | |
364 | ||
1da177e4 LT |
365 | /** |
366 | * macio_add_one_device - Add one device from OF node to the device tree | |
367 | * @chip: pointer to the macio_chip holding the device | |
368 | * @np: pointer to the device node in the OF tree | |
369 | * @in_bay: set to 1 if device is part of a media-bay | |
370 | * | |
371 | * When media-bay is changed to hotswap drivers, this function will | |
372 | * be exposed to the bay driver some way... | |
373 | */ | |
2c5bd01f BH |
374 | static struct macio_dev * macio_add_one_device(struct macio_chip *chip, |
375 | struct device *parent, | |
376 | struct device_node *np, | |
377 | struct macio_dev *in_bay, | |
1da177e4 LT |
378 | struct resource *parent_res) |
379 | { | |
380 | struct macio_dev *dev; | |
1da177e4 LT |
381 | u32 *reg; |
382 | ||
383 | if (np == NULL) | |
384 | return NULL; | |
385 | ||
386 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); | |
387 | if (!dev) | |
388 | return NULL; | |
389 | memset(dev, 0, sizeof(*dev)); | |
390 | ||
391 | dev->bus = &chip->lbus; | |
392 | dev->media_bay = in_bay; | |
393 | dev->ofdev.node = np; | |
394 | dev->ofdev.dma_mask = 0xffffffffUL; | |
395 | dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask; | |
396 | dev->ofdev.dev.parent = parent; | |
397 | dev->ofdev.dev.bus = &macio_bus_type; | |
398 | dev->ofdev.dev.release = macio_release_dev; | |
399 | ||
400 | #ifdef DEBUG | |
401 | printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n", | |
402 | dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj); | |
403 | #endif | |
404 | ||
405 | /* MacIO itself has a different reg, we use it's PCI base */ | |
406 | if (np == chip->of_node) { | |
2c5bd01f BH |
407 | sprintf(dev->ofdev.dev.bus_id, "%1d.%08lx:%.*s", |
408 | chip->lbus.index, | |
1da177e4 LT |
409 | #ifdef CONFIG_PCI |
410 | pci_resource_start(chip->lbus.pdev, 0), | |
411 | #else | |
412 | 0, /* NuBus may want to do something better here */ | |
413 | #endif | |
414 | MAX_NODE_NAME_SIZE, np->name); | |
415 | } else { | |
416 | reg = (u32 *)get_property(np, "reg", NULL); | |
2c5bd01f BH |
417 | sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s", |
418 | chip->lbus.index, | |
1da177e4 LT |
419 | reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name); |
420 | } | |
421 | ||
2c5bd01f BH |
422 | /* Setup interrupts & resources */ |
423 | macio_setup_interrupts(dev); | |
424 | macio_setup_resources(dev, parent_res); | |
1da177e4 | 425 | |
2c5bd01f | 426 | /* Register with core */ |
1da177e4 LT |
427 | if (of_device_register(&dev->ofdev) != 0) { |
428 | printk(KERN_DEBUG"macio: device registration error for %s!\n", | |
429 | dev->ofdev.dev.bus_id); | |
430 | kfree(dev); | |
431 | return NULL; | |
432 | } | |
433 | ||
434 | return dev; | |
435 | } | |
436 | ||
437 | static int macio_skip_device(struct device_node *np) | |
438 | { | |
439 | if (strncmp(np->name, "battery", 7) == 0) | |
440 | return 1; | |
441 | if (strncmp(np->name, "escc-legacy", 11) == 0) | |
442 | return 1; | |
443 | return 0; | |
444 | } | |
445 | ||
446 | /** | |
447 | * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree | |
448 | * @chip: pointer to the macio_chip holding the devices | |
449 | * | |
450 | * This function will do the job of extracting devices from the | |
451 | * Open Firmware device tree, build macio_dev structures and add | |
452 | * them to the Linux device tree. | |
453 | * | |
454 | * For now, childs of media-bay are added now as well. This will | |
455 | * change rsn though. | |
456 | */ | |
457 | static void macio_pci_add_devices(struct macio_chip *chip) | |
458 | { | |
459 | struct device_node *np, *pnode; | |
460 | struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL; | |
461 | struct device *parent = NULL; | |
462 | struct resource *root_res = &iomem_resource; | |
463 | ||
464 | /* Add a node for the macio bus itself */ | |
465 | #ifdef CONFIG_PCI | |
466 | if (chip->lbus.pdev) { | |
467 | parent = &chip->lbus.pdev->dev; | |
468 | root_res = &chip->lbus.pdev->resource[0]; | |
469 | } | |
470 | #endif | |
471 | pnode = of_node_get(chip->of_node); | |
472 | if (pnode == NULL) | |
473 | return; | |
474 | ||
475 | /* Add macio itself to hierarchy */ | |
476 | rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res); | |
477 | if (rdev == NULL) | |
478 | return; | |
479 | root_res = &rdev->resource[0]; | |
480 | ||
481 | /* First scan 1st level */ | |
482 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { | |
2c5bd01f BH |
483 | if (macio_skip_device(np)) |
484 | continue; | |
485 | of_node_get(np); | |
486 | mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL, | |
487 | root_res); | |
488 | if (mdev == NULL) | |
489 | of_node_put(np); | |
490 | else if (strncmp(np->name, "media-bay", 9) == 0) | |
491 | mbdev = mdev; | |
492 | else if (strncmp(np->name, "escc", 4) == 0) | |
493 | sdev = mdev; | |
1da177e4 LT |
494 | } |
495 | ||
496 | /* Add media bay devices if any */ | |
497 | if (mbdev) | |
2c5bd01f BH |
498 | for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np)) |
499 | != NULL;) { | |
500 | if (macio_skip_device(np)) | |
501 | continue; | |
502 | of_node_get(np); | |
503 | if (macio_add_one_device(chip, &mbdev->ofdev.dev, np, | |
504 | mbdev, root_res) == NULL) | |
505 | of_node_put(np); | |
506 | } | |
507 | ||
1da177e4 LT |
508 | /* Add serial ports if any */ |
509 | if (sdev) { | |
2c5bd01f BH |
510 | for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np)) |
511 | != NULL;) { | |
512 | if (macio_skip_device(np)) | |
513 | continue; | |
514 | of_node_get(np); | |
515 | if (macio_add_one_device(chip, &sdev->ofdev.dev, np, | |
516 | NULL, root_res) == NULL) | |
517 | of_node_put(np); | |
518 | } | |
1da177e4 LT |
519 | } |
520 | } | |
521 | ||
522 | ||
523 | /** | |
524 | * macio_register_driver - Registers a new MacIO device driver | |
525 | * @drv: pointer to the driver definition structure | |
526 | */ | |
527 | int macio_register_driver(struct macio_driver *drv) | |
528 | { | |
529 | int count = 0; | |
530 | ||
531 | /* initialize common driver fields */ | |
532 | drv->driver.name = drv->name; | |
533 | drv->driver.bus = &macio_bus_type; | |
1da177e4 LT |
534 | |
535 | /* register with core */ | |
536 | count = driver_register(&drv->driver); | |
537 | return count ? count : 1; | |
538 | } | |
539 | ||
540 | /** | |
541 | * macio_unregister_driver - Unregisters a new MacIO device driver | |
542 | * @drv: pointer to the driver definition structure | |
543 | */ | |
544 | void macio_unregister_driver(struct macio_driver *drv) | |
545 | { | |
546 | driver_unregister(&drv->driver); | |
547 | } | |
548 | ||
549 | /** | |
550 | * macio_request_resource - Request an MMIO resource | |
551 | * @dev: pointer to the device holding the resource | |
552 | * @resource_no: resource number to request | |
553 | * @name: resource name | |
554 | * | |
555 | * Mark memory region number @resource_no associated with MacIO | |
556 | * device @dev as being reserved by owner @name. Do not access | |
557 | * any address inside the memory regions unless this call returns | |
558 | * successfully. | |
559 | * | |
560 | * Returns 0 on success, or %EBUSY on error. A warning | |
561 | * message is also printed on failure. | |
562 | */ | |
2c5bd01f BH |
563 | int macio_request_resource(struct macio_dev *dev, int resource_no, |
564 | const char *name) | |
1da177e4 LT |
565 | { |
566 | if (macio_resource_len(dev, resource_no) == 0) | |
567 | return 0; | |
568 | ||
569 | if (!request_mem_region(macio_resource_start(dev, resource_no), | |
570 | macio_resource_len(dev, resource_no), | |
571 | name)) | |
572 | goto err_out; | |
573 | ||
574 | return 0; | |
575 | ||
576 | err_out: | |
577 | printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx" | |
578 | " for device %s\n", | |
579 | resource_no, | |
580 | macio_resource_len(dev, resource_no), | |
581 | macio_resource_start(dev, resource_no), | |
582 | dev->ofdev.dev.bus_id); | |
583 | return -EBUSY; | |
584 | } | |
585 | ||
586 | /** | |
587 | * macio_release_resource - Release an MMIO resource | |
588 | * @dev: pointer to the device holding the resource | |
589 | * @resource_no: resource number to release | |
590 | */ | |
591 | void macio_release_resource(struct macio_dev *dev, int resource_no) | |
592 | { | |
593 | if (macio_resource_len(dev, resource_no) == 0) | |
594 | return; | |
595 | release_mem_region(macio_resource_start(dev, resource_no), | |
596 | macio_resource_len(dev, resource_no)); | |
597 | } | |
598 | ||
599 | /** | |
600 | * macio_request_resources - Reserve all memory resources | |
601 | * @dev: MacIO device whose resources are to be reserved | |
602 | * @name: Name to be associated with resource. | |
603 | * | |
604 | * Mark all memory regions associated with MacIO device @dev as | |
605 | * being reserved by owner @name. Do not access any address inside | |
606 | * the memory regions unless this call returns successfully. | |
607 | * | |
608 | * Returns 0 on success, or %EBUSY on error. A warning | |
609 | * message is also printed on failure. | |
610 | */ | |
611 | int macio_request_resources(struct macio_dev *dev, const char *name) | |
612 | { | |
613 | int i; | |
614 | ||
615 | for (i = 0; i < dev->n_resources; i++) | |
616 | if (macio_request_resource(dev, i, name)) | |
617 | goto err_out; | |
618 | return 0; | |
619 | ||
620 | err_out: | |
621 | while(--i >= 0) | |
622 | macio_release_resource(dev, i); | |
623 | ||
624 | return -EBUSY; | |
625 | } | |
626 | ||
627 | /** | |
628 | * macio_release_resources - Release reserved memory resources | |
629 | * @dev: MacIO device whose resources were previously reserved | |
630 | */ | |
631 | ||
632 | void macio_release_resources(struct macio_dev *dev) | |
633 | { | |
634 | int i; | |
635 | ||
636 | for (i = 0; i < dev->n_resources; i++) | |
637 | macio_release_resource(dev, i); | |
638 | } | |
639 | ||
640 | ||
641 | #ifdef CONFIG_PCI | |
642 | ||
643 | static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
644 | { | |
645 | struct device_node* np; | |
646 | struct macio_chip* chip; | |
647 | ||
648 | if (ent->vendor != PCI_VENDOR_ID_APPLE) | |
649 | return -ENODEV; | |
650 | ||
2c5bd01f BH |
651 | /* Note regarding refcounting: We assume pci_device_to_OF_node() is |
652 | * ported to new OF APIs and returns a node with refcount incremented. | |
1da177e4 LT |
653 | */ |
654 | np = pci_device_to_OF_node(pdev); | |
655 | if (np == NULL) | |
656 | return -ENODEV; | |
657 | ||
2c5bd01f BH |
658 | /* The above assumption is wrong !!! |
659 | * fix that here for now until I fix the arch code | |
660 | */ | |
1da177e4 LT |
661 | of_node_get(np); |
662 | ||
2c5bd01f BH |
663 | /* We also assume that pmac_feature will have done a get() on nodes |
664 | * stored in the macio chips array | |
1da177e4 LT |
665 | */ |
666 | chip = macio_find(np, macio_unknown); | |
667 | of_node_put(np); | |
668 | if (chip == NULL) | |
669 | return -ENODEV; | |
670 | ||
671 | /* XXX Need locking ??? */ | |
672 | if (chip->lbus.pdev == NULL) { | |
673 | chip->lbus.pdev = pdev; | |
674 | chip->lbus.chip = chip; | |
675 | pci_set_drvdata(pdev, &chip->lbus); | |
676 | pci_set_master(pdev); | |
677 | } | |
678 | ||
679 | printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n", | |
680 | chip->name); | |
681 | ||
682 | /* | |
683 | * HACK ALERT: The WallStreet PowerBook and some OHare based machines | |
2c5bd01f BH |
684 | * have 2 macio ASICs. I must probe the "main" one first or IDE |
685 | * ordering will be incorrect. So I put on "hold" the second one since | |
686 | * it seem to appear first on PCI | |
1da177e4 LT |
687 | */ |
688 | if (chip->type == macio_gatwick || chip->type == macio_ohareII) | |
689 | if (macio_chips[0].lbus.pdev == NULL) { | |
690 | macio_on_hold = chip; | |
691 | return 0; | |
692 | } | |
693 | ||
694 | macio_pci_add_devices(chip); | |
695 | if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) { | |
696 | macio_pci_add_devices(macio_on_hold); | |
697 | macio_on_hold = NULL; | |
698 | } | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
703 | static void __devexit macio_pci_remove(struct pci_dev* pdev) | |
704 | { | |
705 | panic("removing of macio-asic not supported !\n"); | |
706 | } | |
707 | ||
708 | /* | |
709 | * MacIO is matched against any Apple ID, it's probe() function | |
710 | * will then decide wether it applies or not | |
711 | */ | |
712 | static const struct pci_device_id __devinitdata pci_ids [] = { { | |
713 | .vendor = PCI_VENDOR_ID_APPLE, | |
714 | .device = PCI_ANY_ID, | |
715 | .subvendor = PCI_ANY_ID, | |
716 | .subdevice = PCI_ANY_ID, | |
717 | ||
718 | }, { /* end: all zeroes */ } | |
719 | }; | |
720 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
721 | ||
722 | /* pci driver glue; this is a "new style" PCI driver module */ | |
723 | static struct pci_driver macio_pci_driver = { | |
724 | .name = (char *) "macio", | |
725 | .id_table = pci_ids, | |
726 | ||
727 | .probe = macio_pci_probe, | |
728 | .remove = macio_pci_remove, | |
729 | }; | |
730 | ||
731 | #endif /* CONFIG_PCI */ | |
732 | ||
733 | static int __init macio_module_init (void) | |
734 | { | |
735 | #ifdef CONFIG_PCI | |
736 | int rc; | |
737 | ||
738 | rc = pci_register_driver(&macio_pci_driver); | |
739 | if (rc) | |
740 | return rc; | |
741 | #endif /* CONFIG_PCI */ | |
742 | return 0; | |
743 | } | |
744 | ||
745 | module_init(macio_module_init); | |
746 | ||
747 | EXPORT_SYMBOL(macio_register_driver); | |
748 | EXPORT_SYMBOL(macio_unregister_driver); | |
749 | EXPORT_SYMBOL(macio_dev_get); | |
750 | EXPORT_SYMBOL(macio_dev_put); | |
751 | EXPORT_SYMBOL(macio_request_resource); | |
752 | EXPORT_SYMBOL(macio_release_resource); | |
753 | EXPORT_SYMBOL(macio_request_resources); | |
754 | EXPORT_SYMBOL(macio_release_resources); |