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 | ||
1da177e4 LT |
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> | |
4e57b681 | 26 | #include <linux/slab.h> |
5af50730 RH |
27 | #include <linux/of_address.h> |
28 | #include <linux/of_irq.h> | |
4e57b681 | 29 | |
1da177e4 LT |
30 | #include <asm/machdep.h> |
31 | #include <asm/macio.h> | |
32 | #include <asm/pmac_feature.h> | |
33 | #include <asm/prom.h> | |
1da177e4 LT |
34 | |
35 | #undef DEBUG | |
36 | ||
1d7e6cca | 37 | #define MAX_NODE_NAME_SIZE (20 - 12) |
1da177e4 LT |
38 | |
39 | static struct macio_chip *macio_on_hold; | |
40 | ||
41 | static int macio_bus_match(struct device *dev, struct device_driver *drv) | |
42 | { | |
597b9d1e | 43 | const struct of_device_id * matches = drv->of_match_table; |
1da177e4 LT |
44 | |
45 | if (!matches) | |
46 | return 0; | |
47 | ||
44504b2b | 48 | return of_match_device(matches, dev) != NULL; |
1da177e4 LT |
49 | } |
50 | ||
51 | struct macio_dev *macio_dev_get(struct macio_dev *dev) | |
52 | { | |
53 | struct device *tmp; | |
54 | ||
55 | if (!dev) | |
56 | return NULL; | |
57 | tmp = get_device(&dev->ofdev.dev); | |
58 | if (tmp) | |
59 | return to_macio_device(tmp); | |
60 | else | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | void macio_dev_put(struct macio_dev *dev) | |
65 | { | |
66 | if (dev) | |
67 | put_device(&dev->ofdev.dev); | |
68 | } | |
69 | ||
70 | ||
71 | static int macio_device_probe(struct device *dev) | |
72 | { | |
73 | int error = -ENODEV; | |
74 | struct macio_driver *drv; | |
75 | struct macio_dev *macio_dev; | |
5e655772 | 76 | const struct of_device_id *match; |
1da177e4 LT |
77 | |
78 | drv = to_macio_driver(dev->driver); | |
79 | macio_dev = to_macio_device(dev); | |
80 | ||
81 | if (!drv->probe) | |
82 | return error; | |
83 | ||
84 | macio_dev_get(macio_dev); | |
85 | ||
44504b2b | 86 | match = of_match_device(drv->driver.of_match_table, dev); |
1da177e4 LT |
87 | if (match) |
88 | error = drv->probe(macio_dev, match); | |
89 | if (error) | |
90 | macio_dev_put(macio_dev); | |
91 | ||
92 | return error; | |
93 | } | |
94 | ||
95 | static int macio_device_remove(struct device *dev) | |
96 | { | |
97 | struct macio_dev * macio_dev = to_macio_device(dev); | |
98 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
99 | ||
100 | if (dev->driver && drv->remove) | |
101 | drv->remove(macio_dev); | |
102 | macio_dev_put(macio_dev); | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | static void macio_device_shutdown(struct device *dev) | |
108 | { | |
109 | struct macio_dev * macio_dev = to_macio_device(dev); | |
110 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
111 | ||
112 | if (dev->driver && drv->shutdown) | |
113 | drv->shutdown(macio_dev); | |
114 | } | |
115 | ||
f4513904 | 116 | static int macio_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 LT |
117 | { |
118 | struct macio_dev * macio_dev = to_macio_device(dev); | |
119 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
120 | ||
121 | if (dev->driver && drv->suspend) | |
122 | return drv->suspend(macio_dev, state); | |
123 | return 0; | |
124 | } | |
125 | ||
126 | static int macio_device_resume(struct device * dev) | |
127 | { | |
128 | struct macio_dev * macio_dev = to_macio_device(dev); | |
129 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
130 | ||
131 | if (dev->driver && drv->resume) | |
132 | return drv->resume(macio_dev); | |
133 | return 0; | |
134 | } | |
135 | ||
b5bf5b67 JM |
136 | extern struct device_attribute macio_dev_attrs[]; |
137 | ||
1da177e4 LT |
138 | struct bus_type macio_bus_type = { |
139 | .name = "macio", | |
140 | .match = macio_bus_match, | |
07d57a32 | 141 | .uevent = of_device_uevent_modalias, |
4866b124 RK |
142 | .probe = macio_device_probe, |
143 | .remove = macio_device_remove, | |
144 | .shutdown = macio_device_shutdown, | |
1da177e4 LT |
145 | .suspend = macio_device_suspend, |
146 | .resume = macio_device_resume, | |
b5bf5b67 | 147 | .dev_attrs = macio_dev_attrs, |
1da177e4 LT |
148 | }; |
149 | ||
150 | static int __init macio_bus_driver_init(void) | |
151 | { | |
152 | return bus_register(&macio_bus_type); | |
153 | } | |
154 | ||
155 | postcore_initcall(macio_bus_driver_init); | |
156 | ||
157 | ||
158 | /** | |
2c5bd01f BH |
159 | * macio_release_dev - free a macio device structure when all users of it are |
160 | * finished. | |
1da177e4 LT |
161 | * @dev: device that's been disconnected |
162 | * | |
2c5bd01f BH |
163 | * Will be called only by the device core when all users of this macio device |
164 | * are done. This currently means never as we don't hot remove any macio | |
165 | * device yet, though that will happen with mediabay based devices in a later | |
166 | * implementation. | |
1da177e4 LT |
167 | */ |
168 | static void macio_release_dev(struct device *dev) | |
169 | { | |
170 | struct macio_dev *mdev; | |
171 | ||
172 | mdev = to_macio_device(dev); | |
173 | kfree(mdev); | |
174 | } | |
175 | ||
176 | /** | |
177 | * macio_resource_quirks - tweak or skip some resources for a device | |
178 | * @np: pointer to the device node | |
179 | * @res: resulting resource | |
180 | * @index: index of resource in node | |
181 | * | |
182 | * If this routine returns non-null, then the resource is completely | |
183 | * skipped. | |
184 | */ | |
2c5bd01f BH |
185 | static int macio_resource_quirks(struct device_node *np, struct resource *res, |
186 | int index) | |
1da177e4 | 187 | { |
0ebfff14 BH |
188 | /* Only quirks for memory resources for now */ |
189 | if ((res->flags & IORESOURCE_MEM) == 0) | |
190 | return 0; | |
191 | ||
192 | /* Grand Central has too large resource 0 on some machines */ | |
193 | if (index == 0 && !strcmp(np->name, "gc")) | |
194 | res->end = res->start + 0x1ffff; | |
cc5d0189 | 195 | |
0ebfff14 BH |
196 | /* Airport has bogus resource 2 */ |
197 | if (index >= 2 && !strcmp(np->name, "radio")) | |
198 | return 1; | |
cc5d0189 BH |
199 | |
200 | #ifndef CONFIG_PPC64 | |
0ebfff14 BH |
201 | /* DBDMAs may have bogus sizes */ |
202 | if ((res->start & 0x0001f000) == 0x00008000) | |
203 | res->end = res->start + 0xff; | |
cc5d0189 BH |
204 | #endif /* CONFIG_PPC64 */ |
205 | ||
0ebfff14 BH |
206 | /* ESCC parent eats child resources. We could have added a |
207 | * level of hierarchy, but I don't really feel the need | |
208 | * for it | |
209 | */ | |
210 | if (!strcmp(np->name, "escc")) | |
211 | return 1; | |
212 | ||
213 | /* ESCC has bogus resources >= 3 */ | |
214 | if (index >= 3 && !(strcmp(np->name, "ch-a") && | |
215 | strcmp(np->name, "ch-b"))) | |
216 | return 1; | |
217 | ||
218 | /* Media bay has too many resources, keep only first one */ | |
219 | if (index > 0 && !strcmp(np->name, "media-bay")) | |
220 | return 1; | |
221 | ||
222 | /* Some older IDE resources have bogus sizes */ | |
223 | if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") && | |
224 | strcmp(np->type, "ide") && strcmp(np->type, "ata"))) { | |
225 | if (index == 0 && (res->end - res->start) > 0xfff) | |
226 | res->end = res->start + 0xfff; | |
227 | if (index == 1 && (res->end - res->start) > 0xff) | |
228 | res->end = res->start + 0xff; | |
1da177e4 LT |
229 | } |
230 | return 0; | |
231 | } | |
232 | ||
0ebfff14 BH |
233 | static void macio_create_fixup_irq(struct macio_dev *dev, int index, |
234 | unsigned int line) | |
235 | { | |
236 | unsigned int irq; | |
1da177e4 | 237 | |
6e99e458 | 238 | irq = irq_create_mapping(NULL, line); |
ef24ba70 | 239 | if (!irq) { |
0ebfff14 BH |
240 | dev->interrupt[index].start = irq; |
241 | dev->interrupt[index].flags = IORESOURCE_IRQ; | |
1d7e6cca | 242 | dev->interrupt[index].name = dev_name(&dev->ofdev.dev); |
0ebfff14 BH |
243 | } |
244 | if (dev->n_interrupts <= index) | |
245 | dev->n_interrupts = index + 1; | |
246 | } | |
247 | ||
248 | static void macio_add_missing_resources(struct macio_dev *dev) | |
2c5bd01f | 249 | { |
61c7a080 | 250 | struct device_node *np = dev->ofdev.dev.of_node; |
0ebfff14 BH |
251 | unsigned int irq_base; |
252 | ||
253 | /* Gatwick has some missing interrupts on child nodes */ | |
254 | if (dev->bus->chip->type != macio_gatwick) | |
255 | return; | |
2c5bd01f | 256 | |
0ebfff14 BH |
257 | /* irq_base is always 64 on gatwick. I have no cleaner way to get |
258 | * that value from here at this point | |
2c5bd01f | 259 | */ |
0ebfff14 BH |
260 | irq_base = 64; |
261 | ||
262 | /* Fix SCC */ | |
263 | if (strcmp(np->name, "ch-a") == 0) { | |
264 | macio_create_fixup_irq(dev, 0, 15 + irq_base); | |
265 | macio_create_fixup_irq(dev, 1, 4 + irq_base); | |
266 | macio_create_fixup_irq(dev, 2, 5 + irq_base); | |
267 | printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n"); | |
268 | } | |
269 | ||
270 | /* Fix media-bay */ | |
271 | if (strcmp(np->name, "media-bay") == 0) { | |
272 | macio_create_fixup_irq(dev, 0, 29 + irq_base); | |
273 | printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n"); | |
274 | } | |
275 | ||
276 | /* Fix left media bay childs */ | |
277 | if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) { | |
278 | macio_create_fixup_irq(dev, 0, 19 + irq_base); | |
279 | macio_create_fixup_irq(dev, 1, 1 + irq_base); | |
280 | printk(KERN_INFO "macio: fixed left floppy irqs\n"); | |
281 | } | |
282 | if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) { | |
283 | macio_create_fixup_irq(dev, 0, 14 + irq_base); | |
284 | macio_create_fixup_irq(dev, 0, 3 + irq_base); | |
285 | printk(KERN_INFO "macio: fixed left ide irqs\n"); | |
286 | } | |
287 | } | |
288 | ||
289 | static void macio_setup_interrupts(struct macio_dev *dev) | |
290 | { | |
61c7a080 | 291 | struct device_node *np = dev->ofdev.dev.of_node; |
0ebfff14 BH |
292 | unsigned int irq; |
293 | int i = 0, j = 0; | |
294 | ||
295 | for (;;) { | |
fb2881a7 | 296 | struct resource *res; |
2c5bd01f BH |
297 | |
298 | if (j >= MACIO_DEV_COUNT_IRQS) | |
299 | break; | |
fb2881a7 | 300 | res = &dev->interrupt[j]; |
0ebfff14 | 301 | irq = irq_of_parse_and_map(np, i++); |
ef24ba70 | 302 | if (!irq) |
0ebfff14 BH |
303 | break; |
304 | res->start = irq; | |
305 | res->flags = IORESOURCE_IRQ; | |
1d7e6cca | 306 | res->name = dev_name(&dev->ofdev.dev); |
0ebfff14 | 307 | if (macio_resource_quirks(np, res, i - 1)) { |
2c5bd01f | 308 | memset(res, 0, sizeof(struct resource)); |
0ebfff14 BH |
309 | continue; |
310 | } else | |
2c5bd01f BH |
311 | j++; |
312 | } | |
313 | dev->n_interrupts = j; | |
314 | } | |
315 | ||
316 | static void macio_setup_resources(struct macio_dev *dev, | |
317 | struct resource *parent_res) | |
318 | { | |
61c7a080 | 319 | struct device_node *np = dev->ofdev.dev.of_node; |
d2dd482b | 320 | struct resource r; |
2c5bd01f BH |
321 | int index; |
322 | ||
d2dd482b | 323 | for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) { |
fb2881a7 | 324 | struct resource *res; |
2c5bd01f BH |
325 | if (index >= MACIO_DEV_COUNT_RESOURCES) |
326 | break; | |
fb2881a7 | 327 | res = &dev->resource[index]; |
d2dd482b | 328 | *res = r; |
1d7e6cca | 329 | res->name = dev_name(&dev->ofdev.dev); |
2c5bd01f BH |
330 | |
331 | if (macio_resource_quirks(np, res, index)) { | |
332 | memset(res, 0, sizeof(struct resource)); | |
333 | continue; | |
334 | } | |
335 | /* Currently, we consider failure as harmless, this may | |
336 | * change in the future, once I've found all the device | |
337 | * tree bugs in older machines & worked around them | |
cc5d0189 | 338 | */ |
2c5bd01f BH |
339 | if (insert_resource(parent_res, res)) { |
340 | printk(KERN_WARNING "Can't request resource " | |
341 | "%d for MacIO device %s\n", | |
1d7e6cca | 342 | index, dev_name(&dev->ofdev.dev)); |
2c5bd01f BH |
343 | } |
344 | } | |
345 | dev->n_resources = index; | |
346 | } | |
347 | ||
1da177e4 LT |
348 | /** |
349 | * macio_add_one_device - Add one device from OF node to the device tree | |
350 | * @chip: pointer to the macio_chip holding the device | |
351 | * @np: pointer to the device node in the OF tree | |
352 | * @in_bay: set to 1 if device is part of a media-bay | |
353 | * | |
354 | * When media-bay is changed to hotswap drivers, this function will | |
355 | * be exposed to the bay driver some way... | |
356 | */ | |
2c5bd01f BH |
357 | static struct macio_dev * macio_add_one_device(struct macio_chip *chip, |
358 | struct device *parent, | |
359 | struct device_node *np, | |
360 | struct macio_dev *in_bay, | |
1da177e4 LT |
361 | struct resource *parent_res) |
362 | { | |
363 | struct macio_dev *dev; | |
018a3d1d | 364 | const u32 *reg; |
1da177e4 LT |
365 | |
366 | if (np == NULL) | |
367 | return NULL; | |
368 | ||
dd00cc48 | 369 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1da177e4 LT |
370 | if (!dev) |
371 | return NULL; | |
1da177e4 LT |
372 | |
373 | dev->bus = &chip->lbus; | |
374 | dev->media_bay = in_bay; | |
61c7a080 | 375 | dev->ofdev.dev.of_node = np; |
cb6dc512 GL |
376 | dev->ofdev.archdata.dma_mask = 0xffffffffUL; |
377 | dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask; | |
1da177e4 LT |
378 | dev->ofdev.dev.parent = parent; |
379 | dev->ofdev.dev.bus = &macio_bus_type; | |
380 | dev->ofdev.dev.release = macio_release_dev; | |
128b4a0e BH |
381 | dev->ofdev.dev.dma_parms = &dev->dma_parms; |
382 | ||
383 | /* Standard DMA paremeters */ | |
384 | dma_set_max_seg_size(&dev->ofdev.dev, 65536); | |
385 | dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff); | |
1da177e4 | 386 | |
3514141a BH |
387 | #ifdef CONFIG_PCI |
388 | /* Set the DMA ops to the ones from the PCI device, this could be | |
389 | * fishy if we didn't know that on PowerMac it's always direct ops | |
390 | * or iommu ops that will work fine | |
f6aedd86 NA |
391 | * |
392 | * To get all the fields, copy all archdata | |
3514141a | 393 | */ |
f6aedd86 | 394 | dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata; |
46f401c4 | 395 | dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops; |
3514141a BH |
396 | #endif /* CONFIG_PCI */ |
397 | ||
1da177e4 LT |
398 | #ifdef DEBUG |
399 | printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n", | |
400 | dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj); | |
401 | #endif | |
402 | ||
403 | /* MacIO itself has a different reg, we use it's PCI base */ | |
404 | if (np == chip->of_node) { | |
1d7e6cca KS |
405 | dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s", |
406 | chip->lbus.index, | |
1da177e4 | 407 | #ifdef CONFIG_PCI |
d63fb6c5 | 408 | (unsigned int)pci_resource_start(chip->lbus.pdev, 0), |
1da177e4 LT |
409 | #else |
410 | 0, /* NuBus may want to do something better here */ | |
411 | #endif | |
412 | MAX_NODE_NAME_SIZE, np->name); | |
413 | } else { | |
01b2726d | 414 | reg = of_get_property(np, "reg", NULL); |
1d7e6cca KS |
415 | dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s", |
416 | chip->lbus.index, | |
417 | reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name); | |
1da177e4 LT |
418 | } |
419 | ||
2c5bd01f BH |
420 | /* Setup interrupts & resources */ |
421 | macio_setup_interrupts(dev); | |
422 | macio_setup_resources(dev, parent_res); | |
0ebfff14 | 423 | macio_add_missing_resources(dev); |
1da177e4 | 424 | |
2c5bd01f | 425 | /* Register with core */ |
1da177e4 LT |
426 | if (of_device_register(&dev->ofdev) != 0) { |
427 | printk(KERN_DEBUG"macio: device registration error for %s!\n", | |
1d7e6cca | 428 | dev_name(&dev->ofdev.dev)); |
1da177e4 LT |
429 | kfree(dev); |
430 | return NULL; | |
431 | } | |
432 | ||
433 | return dev; | |
434 | } | |
435 | ||
436 | static int macio_skip_device(struct device_node *np) | |
437 | { | |
438 | if (strncmp(np->name, "battery", 7) == 0) | |
439 | return 1; | |
440 | if (strncmp(np->name, "escc-legacy", 11) == 0) | |
441 | return 1; | |
442 | return 0; | |
443 | } | |
444 | ||
445 | /** | |
446 | * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree | |
447 | * @chip: pointer to the macio_chip holding the devices | |
448 | * | |
449 | * This function will do the job of extracting devices from the | |
450 | * Open Firmware device tree, build macio_dev structures and add | |
451 | * them to the Linux device tree. | |
452 | * | |
453 | * For now, childs of media-bay are added now as well. This will | |
454 | * change rsn though. | |
455 | */ | |
456 | static void macio_pci_add_devices(struct macio_chip *chip) | |
457 | { | |
458 | struct device_node *np, *pnode; | |
459 | struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL; | |
460 | struct device *parent = NULL; | |
461 | struct resource *root_res = &iomem_resource; | |
462 | ||
463 | /* Add a node for the macio bus itself */ | |
464 | #ifdef CONFIG_PCI | |
465 | if (chip->lbus.pdev) { | |
466 | parent = &chip->lbus.pdev->dev; | |
467 | root_res = &chip->lbus.pdev->resource[0]; | |
468 | } | |
469 | #endif | |
470 | pnode = of_node_get(chip->of_node); | |
471 | if (pnode == NULL) | |
472 | return; | |
473 | ||
474 | /* Add macio itself to hierarchy */ | |
475 | rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res); | |
476 | if (rdev == NULL) | |
477 | return; | |
478 | root_res = &rdev->resource[0]; | |
479 | ||
480 | /* First scan 1st level */ | |
481 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { | |
2c5bd01f BH |
482 | if (macio_skip_device(np)) |
483 | continue; | |
484 | of_node_get(np); | |
485 | mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL, | |
486 | root_res); | |
487 | if (mdev == NULL) | |
488 | of_node_put(np); | |
489 | else if (strncmp(np->name, "media-bay", 9) == 0) | |
490 | mbdev = mdev; | |
491 | else if (strncmp(np->name, "escc", 4) == 0) | |
492 | sdev = mdev; | |
1da177e4 LT |
493 | } |
494 | ||
495 | /* Add media bay devices if any */ | |
83aea945 AS |
496 | if (mbdev) { |
497 | pnode = mbdev->ofdev.dev.of_node; | |
61c7a080 | 498 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { |
2c5bd01f BH |
499 | if (macio_skip_device(np)) |
500 | continue; | |
501 | of_node_get(np); | |
502 | if (macio_add_one_device(chip, &mbdev->ofdev.dev, np, | |
503 | mbdev, root_res) == NULL) | |
504 | of_node_put(np); | |
505 | } | |
83aea945 | 506 | } |
2c5bd01f | 507 | |
1da177e4 LT |
508 | /* Add serial ports if any */ |
509 | if (sdev) { | |
83aea945 | 510 | pnode = sdev->ofdev.dev.of_node; |
61c7a080 | 511 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { |
2c5bd01f BH |
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 | { | |
1da177e4 | 529 | /* initialize common driver fields */ |
1da177e4 | 530 | drv->driver.bus = &macio_bus_type; |
1da177e4 LT |
531 | |
532 | /* register with core */ | |
d56a3e38 | 533 | return driver_register(&drv->driver); |
1da177e4 LT |
534 | } |
535 | ||
536 | /** | |
537 | * macio_unregister_driver - Unregisters a new MacIO device driver | |
538 | * @drv: pointer to the driver definition structure | |
539 | */ | |
540 | void macio_unregister_driver(struct macio_driver *drv) | |
541 | { | |
542 | driver_unregister(&drv->driver); | |
543 | } | |
544 | ||
7fb19ea0 BH |
545 | /* Managed MacIO resources */ |
546 | struct macio_devres { | |
547 | u32 res_mask; | |
548 | }; | |
549 | ||
550 | static void maciom_release(struct device *gendev, void *res) | |
551 | { | |
552 | struct macio_dev *dev = to_macio_device(gendev); | |
553 | struct macio_devres *dr = res; | |
554 | int i, max; | |
555 | ||
556 | max = min(dev->n_resources, 32); | |
557 | for (i = 0; i < max; i++) { | |
558 | if (dr->res_mask & (1 << i)) | |
559 | macio_release_resource(dev, i); | |
560 | } | |
561 | } | |
562 | ||
563 | int macio_enable_devres(struct macio_dev *dev) | |
564 | { | |
565 | struct macio_devres *dr; | |
566 | ||
567 | dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL); | |
568 | if (!dr) { | |
569 | dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL); | |
570 | if (!dr) | |
571 | return -ENOMEM; | |
572 | } | |
573 | return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL; | |
574 | } | |
575 | ||
576 | static struct macio_devres * find_macio_dr(struct macio_dev *dev) | |
577 | { | |
578 | return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL); | |
579 | } | |
580 | ||
1da177e4 LT |
581 | /** |
582 | * macio_request_resource - Request an MMIO resource | |
583 | * @dev: pointer to the device holding the resource | |
584 | * @resource_no: resource number to request | |
585 | * @name: resource name | |
586 | * | |
587 | * Mark memory region number @resource_no associated with MacIO | |
588 | * device @dev as being reserved by owner @name. Do not access | |
589 | * any address inside the memory regions unless this call returns | |
590 | * successfully. | |
591 | * | |
592 | * Returns 0 on success, or %EBUSY on error. A warning | |
593 | * message is also printed on failure. | |
594 | */ | |
2c5bd01f BH |
595 | int macio_request_resource(struct macio_dev *dev, int resource_no, |
596 | const char *name) | |
1da177e4 | 597 | { |
7fb19ea0 BH |
598 | struct macio_devres *dr = find_macio_dr(dev); |
599 | ||
1da177e4 LT |
600 | if (macio_resource_len(dev, resource_no) == 0) |
601 | return 0; | |
602 | ||
603 | if (!request_mem_region(macio_resource_start(dev, resource_no), | |
604 | macio_resource_len(dev, resource_no), | |
605 | name)) | |
606 | goto err_out; | |
7fb19ea0 BH |
607 | |
608 | if (dr && resource_no < 32) | |
609 | dr->res_mask |= 1 << resource_no; | |
1da177e4 LT |
610 | |
611 | return 0; | |
612 | ||
613 | err_out: | |
614 | printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx" | |
615 | " for device %s\n", | |
616 | resource_no, | |
617 | macio_resource_len(dev, resource_no), | |
618 | macio_resource_start(dev, resource_no), | |
1d7e6cca | 619 | dev_name(&dev->ofdev.dev)); |
1da177e4 LT |
620 | return -EBUSY; |
621 | } | |
622 | ||
623 | /** | |
624 | * macio_release_resource - Release an MMIO resource | |
625 | * @dev: pointer to the device holding the resource | |
626 | * @resource_no: resource number to release | |
627 | */ | |
628 | void macio_release_resource(struct macio_dev *dev, int resource_no) | |
629 | { | |
7fb19ea0 BH |
630 | struct macio_devres *dr = find_macio_dr(dev); |
631 | ||
1da177e4 LT |
632 | if (macio_resource_len(dev, resource_no) == 0) |
633 | return; | |
634 | release_mem_region(macio_resource_start(dev, resource_no), | |
635 | macio_resource_len(dev, resource_no)); | |
7fb19ea0 BH |
636 | if (dr && resource_no < 32) |
637 | dr->res_mask &= ~(1 << resource_no); | |
1da177e4 LT |
638 | } |
639 | ||
640 | /** | |
641 | * macio_request_resources - Reserve all memory resources | |
642 | * @dev: MacIO device whose resources are to be reserved | |
643 | * @name: Name to be associated with resource. | |
644 | * | |
645 | * Mark all memory regions associated with MacIO device @dev as | |
646 | * being reserved by owner @name. Do not access any address inside | |
647 | * the memory regions unless this call returns successfully. | |
648 | * | |
649 | * Returns 0 on success, or %EBUSY on error. A warning | |
650 | * message is also printed on failure. | |
651 | */ | |
652 | int macio_request_resources(struct macio_dev *dev, const char *name) | |
653 | { | |
654 | int i; | |
655 | ||
656 | for (i = 0; i < dev->n_resources; i++) | |
657 | if (macio_request_resource(dev, i, name)) | |
658 | goto err_out; | |
659 | return 0; | |
660 | ||
661 | err_out: | |
662 | while(--i >= 0) | |
663 | macio_release_resource(dev, i); | |
664 | ||
665 | return -EBUSY; | |
666 | } | |
667 | ||
668 | /** | |
669 | * macio_release_resources - Release reserved memory resources | |
670 | * @dev: MacIO device whose resources were previously reserved | |
671 | */ | |
672 | ||
673 | void macio_release_resources(struct macio_dev *dev) | |
674 | { | |
675 | int i; | |
676 | ||
677 | for (i = 0; i < dev->n_resources; i++) | |
678 | macio_release_resource(dev, i); | |
679 | } | |
680 | ||
681 | ||
682 | #ifdef CONFIG_PCI | |
683 | ||
1da42fb6 | 684 | static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
1da177e4 LT |
685 | { |
686 | struct device_node* np; | |
687 | struct macio_chip* chip; | |
688 | ||
689 | if (ent->vendor != PCI_VENDOR_ID_APPLE) | |
690 | return -ENODEV; | |
691 | ||
2c5bd01f BH |
692 | /* Note regarding refcounting: We assume pci_device_to_OF_node() is |
693 | * ported to new OF APIs and returns a node with refcount incremented. | |
1da177e4 LT |
694 | */ |
695 | np = pci_device_to_OF_node(pdev); | |
696 | if (np == NULL) | |
697 | return -ENODEV; | |
698 | ||
2c5bd01f BH |
699 | /* The above assumption is wrong !!! |
700 | * fix that here for now until I fix the arch code | |
701 | */ | |
1da177e4 LT |
702 | of_node_get(np); |
703 | ||
2c5bd01f BH |
704 | /* We also assume that pmac_feature will have done a get() on nodes |
705 | * stored in the macio chips array | |
1da177e4 LT |
706 | */ |
707 | chip = macio_find(np, macio_unknown); | |
708 | of_node_put(np); | |
709 | if (chip == NULL) | |
710 | return -ENODEV; | |
711 | ||
712 | /* XXX Need locking ??? */ | |
713 | if (chip->lbus.pdev == NULL) { | |
714 | chip->lbus.pdev = pdev; | |
715 | chip->lbus.chip = chip; | |
716 | pci_set_drvdata(pdev, &chip->lbus); | |
717 | pci_set_master(pdev); | |
718 | } | |
719 | ||
720 | printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n", | |
721 | chip->name); | |
722 | ||
723 | /* | |
724 | * HACK ALERT: The WallStreet PowerBook and some OHare based machines | |
2c5bd01f BH |
725 | * have 2 macio ASICs. I must probe the "main" one first or IDE |
726 | * ordering will be incorrect. So I put on "hold" the second one since | |
727 | * it seem to appear first on PCI | |
1da177e4 LT |
728 | */ |
729 | if (chip->type == macio_gatwick || chip->type == macio_ohareII) | |
730 | if (macio_chips[0].lbus.pdev == NULL) { | |
731 | macio_on_hold = chip; | |
732 | return 0; | |
733 | } | |
734 | ||
735 | macio_pci_add_devices(chip); | |
736 | if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) { | |
737 | macio_pci_add_devices(macio_on_hold); | |
738 | macio_on_hold = NULL; | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
1da42fb6 | 744 | static void macio_pci_remove(struct pci_dev* pdev) |
1da177e4 LT |
745 | { |
746 | panic("removing of macio-asic not supported !\n"); | |
747 | } | |
748 | ||
749 | /* | |
750 | * MacIO is matched against any Apple ID, it's probe() function | |
751 | * will then decide wether it applies or not | |
752 | */ | |
1da42fb6 | 753 | static const struct pci_device_id pci_ids[] = { { |
1da177e4 LT |
754 | .vendor = PCI_VENDOR_ID_APPLE, |
755 | .device = PCI_ANY_ID, | |
756 | .subvendor = PCI_ANY_ID, | |
757 | .subdevice = PCI_ANY_ID, | |
758 | ||
759 | }, { /* end: all zeroes */ } | |
760 | }; | |
761 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
762 | ||
763 | /* pci driver glue; this is a "new style" PCI driver module */ | |
764 | static struct pci_driver macio_pci_driver = { | |
765 | .name = (char *) "macio", | |
766 | .id_table = pci_ids, | |
767 | ||
768 | .probe = macio_pci_probe, | |
769 | .remove = macio_pci_remove, | |
770 | }; | |
771 | ||
772 | #endif /* CONFIG_PCI */ | |
773 | ||
774 | static int __init macio_module_init (void) | |
775 | { | |
776 | #ifdef CONFIG_PCI | |
777 | int rc; | |
778 | ||
779 | rc = pci_register_driver(&macio_pci_driver); | |
780 | if (rc) | |
781 | return rc; | |
782 | #endif /* CONFIG_PCI */ | |
783 | return 0; | |
784 | } | |
785 | ||
786 | module_init(macio_module_init); | |
787 | ||
788 | EXPORT_SYMBOL(macio_register_driver); | |
789 | EXPORT_SYMBOL(macio_unregister_driver); | |
790 | EXPORT_SYMBOL(macio_dev_get); | |
791 | EXPORT_SYMBOL(macio_dev_put); | |
792 | EXPORT_SYMBOL(macio_request_resource); | |
793 | EXPORT_SYMBOL(macio_release_resource); | |
794 | EXPORT_SYMBOL(macio_request_resources); | |
795 | EXPORT_SYMBOL(macio_release_resources); | |
7fb19ea0 BH |
796 | EXPORT_SYMBOL(macio_enable_devres); |
797 |