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; | |
e6199788 | 143 | char *scratch, *compat, *compat2; |
184f6eb8 | 144 | int i = 0; |
e6199788 | 145 | int length, cplen, cplen2, seen = 0; |
184f6eb8 JM |
146 | |
147 | if (!dev) | |
148 | return -ENODEV; | |
149 | ||
150 | macio_dev = to_macio_device(dev); | |
151 | if (!macio_dev) | |
152 | return -ENODEV; | |
153 | ||
154 | of = &macio_dev->ofdev; | |
184f6eb8 JM |
155 | |
156 | /* stuff we want to pass to /sbin/hotplug */ | |
e6199788 OH |
157 | envp[i++] = scratch = buffer; |
158 | length = scnprintf (scratch, buffer_size, "OF_NAME=%s", of->node->name); | |
184f6eb8 | 159 | ++length; |
e6199788 OH |
160 | buffer_size -= length; |
161 | if ((buffer_size <= 0) || (i >= num_envp)) | |
162 | return -ENOMEM; | |
184f6eb8 JM |
163 | scratch += length; |
164 | ||
165 | envp[i++] = scratch; | |
e6199788 | 166 | length = scnprintf (scratch, buffer_size, "OF_TYPE=%s", of->node->type); |
184f6eb8 | 167 | ++length; |
e6199788 OH |
168 | buffer_size -= length; |
169 | if ((buffer_size <= 0) || (i >= num_envp)) | |
170 | return -ENOMEM; | |
184f6eb8 JM |
171 | scratch += length; |
172 | ||
173 | /* Since the compatible field can contain pretty much anything | |
174 | * it's not really legal to split it out with commas. We split it | |
175 | * up using a number of environment variables instead. */ | |
176 | ||
177 | compat = (char *) get_property(of->node, "compatible", &cplen); | |
e6199788 OH |
178 | compat2 = compat; |
179 | cplen2= cplen; | |
184f6eb8 | 180 | while (compat && cplen > 0) { |
184f6eb8 | 181 | envp[i++] = scratch; |
e6199788 | 182 | length = scnprintf (scratch, buffer_size, |
184f6eb8 | 183 | "OF_COMPATIBLE_%d=%s", seen, compat); |
e6199788 OH |
184 | ++length; |
185 | buffer_size -= length; | |
186 | if ((buffer_size <= 0) || (i >= num_envp)) | |
184f6eb8 | 187 | return -ENOMEM; |
184f6eb8 | 188 | scratch += length; |
e6199788 OH |
189 | length = strlen (compat) + 1; |
190 | compat += length; | |
191 | cplen -= length; | |
184f6eb8 JM |
192 | seen++; |
193 | } | |
194 | ||
195 | envp[i++] = scratch; | |
e6199788 | 196 | length = scnprintf (scratch, buffer_size, "OF_COMPATIBLE_N=%d", seen); |
184f6eb8 | 197 | ++length; |
e6199788 OH |
198 | buffer_size -= length; |
199 | if ((buffer_size <= 0) || (i >= num_envp)) | |
200 | return -ENOMEM; | |
201 | scratch += length; | |
202 | ||
203 | envp[i++] = scratch; | |
204 | length = scnprintf (scratch, buffer_size, "MODALIAS=of:N%sT%s", | |
205 | of->node->name, of->node->type); | |
206 | /* overwrite '\0' */ | |
207 | buffer_size -= length; | |
208 | if ((buffer_size <= 0) || (i >= num_envp)) | |
209 | return -ENOMEM; | |
184f6eb8 JM |
210 | scratch += length; |
211 | ||
e6199788 OH |
212 | if (!compat2) { |
213 | compat2 = ""; | |
214 | cplen2 = 1; | |
215 | } | |
216 | while (cplen2 > 0) { | |
217 | length = snprintf (scratch, buffer_size, "C%s", compat2); | |
218 | buffer_size -= length; | |
219 | if (buffer_size <= 0) | |
220 | return -ENOMEM; | |
221 | scratch += length; | |
222 | length = strlen (compat2) + 1; | |
223 | compat2 += length; | |
224 | cplen2 -= length; | |
225 | } | |
226 | ||
184f6eb8 JM |
227 | envp[i] = NULL; |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
b5bf5b67 JM |
232 | extern struct device_attribute macio_dev_attrs[]; |
233 | ||
1da177e4 LT |
234 | struct bus_type macio_bus_type = { |
235 | .name = "macio", | |
236 | .match = macio_bus_match, | |
312c004d | 237 | .uevent = macio_uevent, |
4866b124 RK |
238 | .probe = macio_device_probe, |
239 | .remove = macio_device_remove, | |
240 | .shutdown = macio_device_shutdown, | |
1da177e4 LT |
241 | .suspend = macio_device_suspend, |
242 | .resume = macio_device_resume, | |
b5bf5b67 | 243 | .dev_attrs = macio_dev_attrs, |
1da177e4 LT |
244 | }; |
245 | ||
246 | static int __init macio_bus_driver_init(void) | |
247 | { | |
248 | return bus_register(&macio_bus_type); | |
249 | } | |
250 | ||
251 | postcore_initcall(macio_bus_driver_init); | |
252 | ||
253 | ||
254 | /** | |
2c5bd01f BH |
255 | * macio_release_dev - free a macio device structure when all users of it are |
256 | * finished. | |
1da177e4 LT |
257 | * @dev: device that's been disconnected |
258 | * | |
2c5bd01f BH |
259 | * Will be called only by the device core when all users of this macio device |
260 | * are done. This currently means never as we don't hot remove any macio | |
261 | * device yet, though that will happen with mediabay based devices in a later | |
262 | * implementation. | |
1da177e4 LT |
263 | */ |
264 | static void macio_release_dev(struct device *dev) | |
265 | { | |
266 | struct macio_dev *mdev; | |
267 | ||
268 | mdev = to_macio_device(dev); | |
269 | kfree(mdev); | |
270 | } | |
271 | ||
272 | /** | |
273 | * macio_resource_quirks - tweak or skip some resources for a device | |
274 | * @np: pointer to the device node | |
275 | * @res: resulting resource | |
276 | * @index: index of resource in node | |
277 | * | |
278 | * If this routine returns non-null, then the resource is completely | |
279 | * skipped. | |
280 | */ | |
2c5bd01f BH |
281 | static int macio_resource_quirks(struct device_node *np, struct resource *res, |
282 | int index) | |
1da177e4 LT |
283 | { |
284 | if (res->flags & IORESOURCE_MEM) { | |
285 | /* Grand Central has too large resource 0 on some machines */ | |
cc5d0189 | 286 | if (index == 0 && !strcmp(np->name, "gc")) |
1da177e4 | 287 | res->end = res->start + 0x1ffff; |
cc5d0189 | 288 | |
1da177e4 LT |
289 | /* Airport has bogus resource 2 */ |
290 | if (index >= 2 && !strcmp(np->name, "radio")) | |
291 | return 1; | |
cc5d0189 BH |
292 | |
293 | #ifndef CONFIG_PPC64 | |
1da177e4 | 294 | /* DBDMAs may have bogus sizes */ |
cc5d0189 | 295 | if ((res->start & 0x0001f000) == 0x00008000) |
1da177e4 | 296 | res->end = res->start + 0xff; |
cc5d0189 BH |
297 | #endif /* CONFIG_PPC64 */ |
298 | ||
2c5bd01f BH |
299 | /* ESCC parent eats child resources. We could have added a |
300 | * level of hierarchy, but I don't really feel the need | |
301 | * for it | |
302 | */ | |
1da177e4 LT |
303 | if (!strcmp(np->name, "escc")) |
304 | return 1; | |
cc5d0189 | 305 | |
1da177e4 | 306 | /* ESCC has bogus resources >= 3 */ |
2c5bd01f BH |
307 | if (index >= 3 && !(strcmp(np->name, "ch-a") && |
308 | strcmp(np->name, "ch-b"))) | |
1da177e4 | 309 | return 1; |
cc5d0189 | 310 | |
1da177e4 LT |
311 | /* Media bay has too many resources, keep only first one */ |
312 | if (index > 0 && !strcmp(np->name, "media-bay")) | |
313 | return 1; | |
cc5d0189 | 314 | |
1da177e4 LT |
315 | /* Some older IDE resources have bogus sizes */ |
316 | if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") && | |
317 | strcmp(np->type, "ide") && strcmp(np->type, "ata"))) { | |
cc5d0189 | 318 | if (index == 0 && (res->end - res->start) > 0xfff) |
1da177e4 | 319 | res->end = res->start + 0xfff; |
cc5d0189 | 320 | if (index == 1 && (res->end - res->start) > 0xff) |
1da177e4 | 321 | res->end = res->start + 0xff; |
1da177e4 LT |
322 | } |
323 | } | |
324 | return 0; | |
325 | } | |
326 | ||
327 | ||
2c5bd01f BH |
328 | static void macio_setup_interrupts(struct macio_dev *dev) |
329 | { | |
330 | struct device_node *np = dev->ofdev.node; | |
331 | int i,j; | |
332 | ||
333 | /* For now, we use pre-parsed entries in the device-tree for | |
334 | * interrupt routing and addresses, but we should change that | |
335 | * to dynamically parsed entries and so get rid of most of the | |
336 | * clutter in struct device_node | |
337 | */ | |
338 | for (i = j = 0; i < np->n_intrs; i++) { | |
339 | struct resource *res = &dev->interrupt[j]; | |
340 | ||
341 | if (j >= MACIO_DEV_COUNT_IRQS) | |
342 | break; | |
343 | res->start = np->intrs[i].line; | |
344 | res->flags = IORESOURCE_IO; | |
345 | if (np->intrs[j].sense) | |
346 | res->flags |= IORESOURCE_IRQ_LOWLEVEL; | |
347 | else | |
348 | res->flags |= IORESOURCE_IRQ_HIGHEDGE; | |
349 | res->name = dev->ofdev.dev.bus_id; | |
350 | if (macio_resource_quirks(np, res, i)) | |
351 | memset(res, 0, sizeof(struct resource)); | |
352 | else | |
353 | j++; | |
354 | } | |
355 | dev->n_interrupts = j; | |
356 | } | |
357 | ||
358 | static void macio_setup_resources(struct macio_dev *dev, | |
359 | struct resource *parent_res) | |
360 | { | |
361 | struct device_node *np = dev->ofdev.node; | |
d2dd482b | 362 | struct resource r; |
2c5bd01f BH |
363 | int index; |
364 | ||
d2dd482b | 365 | for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) { |
2c5bd01f BH |
366 | struct resource *res = &dev->resource[index]; |
367 | if (index >= MACIO_DEV_COUNT_RESOURCES) | |
368 | break; | |
d2dd482b | 369 | *res = r; |
2c5bd01f BH |
370 | res->name = dev->ofdev.dev.bus_id; |
371 | ||
372 | if (macio_resource_quirks(np, res, index)) { | |
373 | memset(res, 0, sizeof(struct resource)); | |
374 | continue; | |
375 | } | |
376 | /* Currently, we consider failure as harmless, this may | |
377 | * change in the future, once I've found all the device | |
378 | * tree bugs in older machines & worked around them | |
cc5d0189 | 379 | */ |
2c5bd01f BH |
380 | if (insert_resource(parent_res, res)) { |
381 | printk(KERN_WARNING "Can't request resource " | |
382 | "%d for MacIO device %s\n", | |
383 | index, dev->ofdev.dev.bus_id); | |
384 | } | |
385 | } | |
386 | dev->n_resources = index; | |
387 | } | |
388 | ||
1da177e4 LT |
389 | /** |
390 | * macio_add_one_device - Add one device from OF node to the device tree | |
391 | * @chip: pointer to the macio_chip holding the device | |
392 | * @np: pointer to the device node in the OF tree | |
393 | * @in_bay: set to 1 if device is part of a media-bay | |
394 | * | |
395 | * When media-bay is changed to hotswap drivers, this function will | |
396 | * be exposed to the bay driver some way... | |
397 | */ | |
2c5bd01f BH |
398 | static struct macio_dev * macio_add_one_device(struct macio_chip *chip, |
399 | struct device *parent, | |
400 | struct device_node *np, | |
401 | struct macio_dev *in_bay, | |
1da177e4 LT |
402 | struct resource *parent_res) |
403 | { | |
404 | struct macio_dev *dev; | |
1da177e4 LT |
405 | u32 *reg; |
406 | ||
407 | if (np == NULL) | |
408 | return NULL; | |
409 | ||
410 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); | |
411 | if (!dev) | |
412 | return NULL; | |
413 | memset(dev, 0, sizeof(*dev)); | |
414 | ||
415 | dev->bus = &chip->lbus; | |
416 | dev->media_bay = in_bay; | |
417 | dev->ofdev.node = np; | |
418 | dev->ofdev.dma_mask = 0xffffffffUL; | |
419 | dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask; | |
420 | dev->ofdev.dev.parent = parent; | |
421 | dev->ofdev.dev.bus = &macio_bus_type; | |
422 | dev->ofdev.dev.release = macio_release_dev; | |
423 | ||
424 | #ifdef DEBUG | |
425 | printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n", | |
426 | dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj); | |
427 | #endif | |
428 | ||
429 | /* MacIO itself has a different reg, we use it's PCI base */ | |
430 | if (np == chip->of_node) { | |
e29419ff | 431 | sprintf(dev->ofdev.dev.bus_id, "%1d.%016llx:%.*s", |
2c5bd01f | 432 | chip->lbus.index, |
1da177e4 | 433 | #ifdef CONFIG_PCI |
e29419ff | 434 | (unsigned long long)pci_resource_start(chip->lbus.pdev, 0), |
1da177e4 LT |
435 | #else |
436 | 0, /* NuBus may want to do something better here */ | |
437 | #endif | |
438 | MAX_NODE_NAME_SIZE, np->name); | |
439 | } else { | |
440 | reg = (u32 *)get_property(np, "reg", NULL); | |
2c5bd01f BH |
441 | sprintf(dev->ofdev.dev.bus_id, "%1d.%08x:%.*s", |
442 | chip->lbus.index, | |
1da177e4 LT |
443 | reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name); |
444 | } | |
445 | ||
2c5bd01f BH |
446 | /* Setup interrupts & resources */ |
447 | macio_setup_interrupts(dev); | |
448 | macio_setup_resources(dev, parent_res); | |
1da177e4 | 449 | |
2c5bd01f | 450 | /* Register with core */ |
1da177e4 LT |
451 | if (of_device_register(&dev->ofdev) != 0) { |
452 | printk(KERN_DEBUG"macio: device registration error for %s!\n", | |
453 | dev->ofdev.dev.bus_id); | |
454 | kfree(dev); | |
455 | return NULL; | |
456 | } | |
457 | ||
458 | return dev; | |
459 | } | |
460 | ||
461 | static int macio_skip_device(struct device_node *np) | |
462 | { | |
463 | if (strncmp(np->name, "battery", 7) == 0) | |
464 | return 1; | |
465 | if (strncmp(np->name, "escc-legacy", 11) == 0) | |
466 | return 1; | |
467 | return 0; | |
468 | } | |
469 | ||
470 | /** | |
471 | * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree | |
472 | * @chip: pointer to the macio_chip holding the devices | |
473 | * | |
474 | * This function will do the job of extracting devices from the | |
475 | * Open Firmware device tree, build macio_dev structures and add | |
476 | * them to the Linux device tree. | |
477 | * | |
478 | * For now, childs of media-bay are added now as well. This will | |
479 | * change rsn though. | |
480 | */ | |
481 | static void macio_pci_add_devices(struct macio_chip *chip) | |
482 | { | |
483 | struct device_node *np, *pnode; | |
484 | struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL; | |
485 | struct device *parent = NULL; | |
486 | struct resource *root_res = &iomem_resource; | |
487 | ||
488 | /* Add a node for the macio bus itself */ | |
489 | #ifdef CONFIG_PCI | |
490 | if (chip->lbus.pdev) { | |
491 | parent = &chip->lbus.pdev->dev; | |
492 | root_res = &chip->lbus.pdev->resource[0]; | |
493 | } | |
494 | #endif | |
495 | pnode = of_node_get(chip->of_node); | |
496 | if (pnode == NULL) | |
497 | return; | |
498 | ||
499 | /* Add macio itself to hierarchy */ | |
500 | rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res); | |
501 | if (rdev == NULL) | |
502 | return; | |
503 | root_res = &rdev->resource[0]; | |
504 | ||
505 | /* First scan 1st level */ | |
506 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { | |
2c5bd01f BH |
507 | if (macio_skip_device(np)) |
508 | continue; | |
509 | of_node_get(np); | |
510 | mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL, | |
511 | root_res); | |
512 | if (mdev == NULL) | |
513 | of_node_put(np); | |
514 | else if (strncmp(np->name, "media-bay", 9) == 0) | |
515 | mbdev = mdev; | |
516 | else if (strncmp(np->name, "escc", 4) == 0) | |
517 | sdev = mdev; | |
1da177e4 LT |
518 | } |
519 | ||
520 | /* Add media bay devices if any */ | |
521 | if (mbdev) | |
2c5bd01f BH |
522 | for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np)) |
523 | != NULL;) { | |
524 | if (macio_skip_device(np)) | |
525 | continue; | |
526 | of_node_get(np); | |
527 | if (macio_add_one_device(chip, &mbdev->ofdev.dev, np, | |
528 | mbdev, root_res) == NULL) | |
529 | of_node_put(np); | |
530 | } | |
531 | ||
1da177e4 LT |
532 | /* Add serial ports if any */ |
533 | if (sdev) { | |
2c5bd01f BH |
534 | for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np)) |
535 | != NULL;) { | |
536 | if (macio_skip_device(np)) | |
537 | continue; | |
538 | of_node_get(np); | |
539 | if (macio_add_one_device(chip, &sdev->ofdev.dev, np, | |
540 | NULL, root_res) == NULL) | |
541 | of_node_put(np); | |
542 | } | |
1da177e4 LT |
543 | } |
544 | } | |
545 | ||
546 | ||
547 | /** | |
548 | * macio_register_driver - Registers a new MacIO device driver | |
549 | * @drv: pointer to the driver definition structure | |
550 | */ | |
551 | int macio_register_driver(struct macio_driver *drv) | |
552 | { | |
1da177e4 LT |
553 | /* initialize common driver fields */ |
554 | drv->driver.name = drv->name; | |
555 | drv->driver.bus = &macio_bus_type; | |
1da177e4 LT |
556 | |
557 | /* register with core */ | |
d56a3e38 | 558 | return driver_register(&drv->driver); |
1da177e4 LT |
559 | } |
560 | ||
561 | /** | |
562 | * macio_unregister_driver - Unregisters a new MacIO device driver | |
563 | * @drv: pointer to the driver definition structure | |
564 | */ | |
565 | void macio_unregister_driver(struct macio_driver *drv) | |
566 | { | |
567 | driver_unregister(&drv->driver); | |
568 | } | |
569 | ||
570 | /** | |
571 | * macio_request_resource - Request an MMIO resource | |
572 | * @dev: pointer to the device holding the resource | |
573 | * @resource_no: resource number to request | |
574 | * @name: resource name | |
575 | * | |
576 | * Mark memory region number @resource_no associated with MacIO | |
577 | * device @dev as being reserved by owner @name. Do not access | |
578 | * any address inside the memory regions unless this call returns | |
579 | * successfully. | |
580 | * | |
581 | * Returns 0 on success, or %EBUSY on error. A warning | |
582 | * message is also printed on failure. | |
583 | */ | |
2c5bd01f BH |
584 | int macio_request_resource(struct macio_dev *dev, int resource_no, |
585 | const char *name) | |
1da177e4 LT |
586 | { |
587 | if (macio_resource_len(dev, resource_no) == 0) | |
588 | return 0; | |
589 | ||
590 | if (!request_mem_region(macio_resource_start(dev, resource_no), | |
591 | macio_resource_len(dev, resource_no), | |
592 | name)) | |
593 | goto err_out; | |
594 | ||
595 | return 0; | |
596 | ||
597 | err_out: | |
598 | printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx" | |
599 | " for device %s\n", | |
600 | resource_no, | |
601 | macio_resource_len(dev, resource_no), | |
602 | macio_resource_start(dev, resource_no), | |
603 | dev->ofdev.dev.bus_id); | |
604 | return -EBUSY; | |
605 | } | |
606 | ||
607 | /** | |
608 | * macio_release_resource - Release an MMIO resource | |
609 | * @dev: pointer to the device holding the resource | |
610 | * @resource_no: resource number to release | |
611 | */ | |
612 | void macio_release_resource(struct macio_dev *dev, int resource_no) | |
613 | { | |
614 | if (macio_resource_len(dev, resource_no) == 0) | |
615 | return; | |
616 | release_mem_region(macio_resource_start(dev, resource_no), | |
617 | macio_resource_len(dev, resource_no)); | |
618 | } | |
619 | ||
620 | /** | |
621 | * macio_request_resources - Reserve all memory resources | |
622 | * @dev: MacIO device whose resources are to be reserved | |
623 | * @name: Name to be associated with resource. | |
624 | * | |
625 | * Mark all memory regions associated with MacIO device @dev as | |
626 | * being reserved by owner @name. Do not access any address inside | |
627 | * the memory regions unless this call returns successfully. | |
628 | * | |
629 | * Returns 0 on success, or %EBUSY on error. A warning | |
630 | * message is also printed on failure. | |
631 | */ | |
632 | int macio_request_resources(struct macio_dev *dev, const char *name) | |
633 | { | |
634 | int i; | |
635 | ||
636 | for (i = 0; i < dev->n_resources; i++) | |
637 | if (macio_request_resource(dev, i, name)) | |
638 | goto err_out; | |
639 | return 0; | |
640 | ||
641 | err_out: | |
642 | while(--i >= 0) | |
643 | macio_release_resource(dev, i); | |
644 | ||
645 | return -EBUSY; | |
646 | } | |
647 | ||
648 | /** | |
649 | * macio_release_resources - Release reserved memory resources | |
650 | * @dev: MacIO device whose resources were previously reserved | |
651 | */ | |
652 | ||
653 | void macio_release_resources(struct macio_dev *dev) | |
654 | { | |
655 | int i; | |
656 | ||
657 | for (i = 0; i < dev->n_resources; i++) | |
658 | macio_release_resource(dev, i); | |
659 | } | |
660 | ||
661 | ||
662 | #ifdef CONFIG_PCI | |
663 | ||
664 | static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
665 | { | |
666 | struct device_node* np; | |
667 | struct macio_chip* chip; | |
668 | ||
669 | if (ent->vendor != PCI_VENDOR_ID_APPLE) | |
670 | return -ENODEV; | |
671 | ||
2c5bd01f BH |
672 | /* Note regarding refcounting: We assume pci_device_to_OF_node() is |
673 | * ported to new OF APIs and returns a node with refcount incremented. | |
1da177e4 LT |
674 | */ |
675 | np = pci_device_to_OF_node(pdev); | |
676 | if (np == NULL) | |
677 | return -ENODEV; | |
678 | ||
2c5bd01f BH |
679 | /* The above assumption is wrong !!! |
680 | * fix that here for now until I fix the arch code | |
681 | */ | |
1da177e4 LT |
682 | of_node_get(np); |
683 | ||
2c5bd01f BH |
684 | /* We also assume that pmac_feature will have done a get() on nodes |
685 | * stored in the macio chips array | |
1da177e4 LT |
686 | */ |
687 | chip = macio_find(np, macio_unknown); | |
688 | of_node_put(np); | |
689 | if (chip == NULL) | |
690 | return -ENODEV; | |
691 | ||
692 | /* XXX Need locking ??? */ | |
693 | if (chip->lbus.pdev == NULL) { | |
694 | chip->lbus.pdev = pdev; | |
695 | chip->lbus.chip = chip; | |
696 | pci_set_drvdata(pdev, &chip->lbus); | |
697 | pci_set_master(pdev); | |
698 | } | |
699 | ||
700 | printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n", | |
701 | chip->name); | |
702 | ||
703 | /* | |
704 | * HACK ALERT: The WallStreet PowerBook and some OHare based machines | |
2c5bd01f BH |
705 | * have 2 macio ASICs. I must probe the "main" one first or IDE |
706 | * ordering will be incorrect. So I put on "hold" the second one since | |
707 | * it seem to appear first on PCI | |
1da177e4 LT |
708 | */ |
709 | if (chip->type == macio_gatwick || chip->type == macio_ohareII) | |
710 | if (macio_chips[0].lbus.pdev == NULL) { | |
711 | macio_on_hold = chip; | |
712 | return 0; | |
713 | } | |
714 | ||
715 | macio_pci_add_devices(chip); | |
716 | if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) { | |
717 | macio_pci_add_devices(macio_on_hold); | |
718 | macio_on_hold = NULL; | |
719 | } | |
720 | ||
721 | return 0; | |
722 | } | |
723 | ||
724 | static void __devexit macio_pci_remove(struct pci_dev* pdev) | |
725 | { | |
726 | panic("removing of macio-asic not supported !\n"); | |
727 | } | |
728 | ||
729 | /* | |
730 | * MacIO is matched against any Apple ID, it's probe() function | |
731 | * will then decide wether it applies or not | |
732 | */ | |
733 | static const struct pci_device_id __devinitdata pci_ids [] = { { | |
734 | .vendor = PCI_VENDOR_ID_APPLE, | |
735 | .device = PCI_ANY_ID, | |
736 | .subvendor = PCI_ANY_ID, | |
737 | .subdevice = PCI_ANY_ID, | |
738 | ||
739 | }, { /* end: all zeroes */ } | |
740 | }; | |
741 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
742 | ||
743 | /* pci driver glue; this is a "new style" PCI driver module */ | |
744 | static struct pci_driver macio_pci_driver = { | |
745 | .name = (char *) "macio", | |
746 | .id_table = pci_ids, | |
747 | ||
748 | .probe = macio_pci_probe, | |
749 | .remove = macio_pci_remove, | |
750 | }; | |
751 | ||
752 | #endif /* CONFIG_PCI */ | |
753 | ||
754 | static int __init macio_module_init (void) | |
755 | { | |
756 | #ifdef CONFIG_PCI | |
757 | int rc; | |
758 | ||
759 | rc = pci_register_driver(&macio_pci_driver); | |
760 | if (rc) | |
761 | return rc; | |
762 | #endif /* CONFIG_PCI */ | |
763 | return 0; | |
764 | } | |
765 | ||
766 | module_init(macio_module_init); | |
767 | ||
768 | EXPORT_SYMBOL(macio_register_driver); | |
769 | EXPORT_SYMBOL(macio_unregister_driver); | |
770 | EXPORT_SYMBOL(macio_dev_get); | |
771 | EXPORT_SYMBOL(macio_dev_put); | |
772 | EXPORT_SYMBOL(macio_request_resource); | |
773 | EXPORT_SYMBOL(macio_release_resource); | |
774 | EXPORT_SYMBOL(macio_request_resources); | |
775 | EXPORT_SYMBOL(macio_release_resources); |