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 TS |
26 | #include <linux/slab.h> |
27 | ||
1da177e4 LT |
28 | #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 | ||
1d7e6cca | 36 | #define MAX_NODE_NAME_SIZE (20 - 12) |
1da177e4 LT |
37 | |
38 | static struct macio_chip *macio_on_hold; | |
39 | ||
40 | static int macio_bus_match(struct device *dev, struct device_driver *drv) | |
41 | { | |
597b9d1e | 42 | const struct of_device_id * matches = drv->of_match_table; |
1da177e4 LT |
43 | |
44 | if (!matches) | |
45 | return 0; | |
46 | ||
44504b2b | 47 | return of_match_device(matches, dev) != NULL; |
1da177e4 LT |
48 | } |
49 | ||
50 | struct macio_dev *macio_dev_get(struct macio_dev *dev) | |
51 | { | |
52 | struct device *tmp; | |
53 | ||
54 | if (!dev) | |
55 | return NULL; | |
56 | tmp = get_device(&dev->ofdev.dev); | |
57 | if (tmp) | |
58 | return to_macio_device(tmp); | |
59 | else | |
60 | return NULL; | |
61 | } | |
62 | ||
63 | void macio_dev_put(struct macio_dev *dev) | |
64 | { | |
65 | if (dev) | |
66 | put_device(&dev->ofdev.dev); | |
67 | } | |
68 | ||
69 | ||
70 | static int macio_device_probe(struct device *dev) | |
71 | { | |
72 | int error = -ENODEV; | |
73 | struct macio_driver *drv; | |
74 | struct macio_dev *macio_dev; | |
5e655772 | 75 | const struct of_device_id *match; |
1da177e4 LT |
76 | |
77 | drv = to_macio_driver(dev->driver); | |
78 | macio_dev = to_macio_device(dev); | |
79 | ||
80 | if (!drv->probe) | |
81 | return error; | |
82 | ||
83 | macio_dev_get(macio_dev); | |
84 | ||
44504b2b | 85 | match = of_match_device(drv->driver.of_match_table, dev); |
1da177e4 LT |
86 | if (match) |
87 | error = drv->probe(macio_dev, match); | |
88 | if (error) | |
89 | macio_dev_put(macio_dev); | |
90 | ||
91 | return error; | |
92 | } | |
93 | ||
94 | static int macio_device_remove(struct device *dev) | |
95 | { | |
96 | struct macio_dev * macio_dev = to_macio_device(dev); | |
97 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
98 | ||
99 | if (dev->driver && drv->remove) | |
100 | drv->remove(macio_dev); | |
101 | macio_dev_put(macio_dev); | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | static void macio_device_shutdown(struct device *dev) | |
107 | { | |
108 | struct macio_dev * macio_dev = to_macio_device(dev); | |
109 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
110 | ||
111 | if (dev->driver && drv->shutdown) | |
112 | drv->shutdown(macio_dev); | |
113 | } | |
114 | ||
f4513904 | 115 | static int macio_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 LT |
116 | { |
117 | struct macio_dev * macio_dev = to_macio_device(dev); | |
118 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
119 | ||
120 | if (dev->driver && drv->suspend) | |
121 | return drv->suspend(macio_dev, state); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static int macio_device_resume(struct device * dev) | |
126 | { | |
127 | struct macio_dev * macio_dev = to_macio_device(dev); | |
128 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
129 | ||
130 | if (dev->driver && drv->resume) | |
131 | return drv->resume(macio_dev); | |
132 | return 0; | |
133 | } | |
134 | ||
b5bf5b67 JM |
135 | extern struct device_attribute macio_dev_attrs[]; |
136 | ||
1da177e4 LT |
137 | struct bus_type macio_bus_type = { |
138 | .name = "macio", | |
139 | .match = macio_bus_match, | |
cc11645b | 140 | .uevent = of_device_uevent, |
4866b124 RK |
141 | .probe = macio_device_probe, |
142 | .remove = macio_device_remove, | |
143 | .shutdown = macio_device_shutdown, | |
1da177e4 LT |
144 | .suspend = macio_device_suspend, |
145 | .resume = macio_device_resume, | |
b5bf5b67 | 146 | .dev_attrs = macio_dev_attrs, |
1da177e4 LT |
147 | }; |
148 | ||
149 | static int __init macio_bus_driver_init(void) | |
150 | { | |
151 | return bus_register(&macio_bus_type); | |
152 | } | |
153 | ||
154 | postcore_initcall(macio_bus_driver_init); | |
155 | ||
156 | ||
157 | /** | |
2c5bd01f BH |
158 | * macio_release_dev - free a macio device structure when all users of it are |
159 | * finished. | |
1da177e4 LT |
160 | * @dev: device that's been disconnected |
161 | * | |
2c5bd01f BH |
162 | * Will be called only by the device core when all users of this macio device |
163 | * are done. This currently means never as we don't hot remove any macio | |
164 | * device yet, though that will happen with mediabay based devices in a later | |
165 | * implementation. | |
1da177e4 LT |
166 | */ |
167 | static void macio_release_dev(struct device *dev) | |
168 | { | |
169 | struct macio_dev *mdev; | |
170 | ||
171 | mdev = to_macio_device(dev); | |
172 | kfree(mdev); | |
173 | } | |
174 | ||
175 | /** | |
176 | * macio_resource_quirks - tweak or skip some resources for a device | |
177 | * @np: pointer to the device node | |
178 | * @res: resulting resource | |
179 | * @index: index of resource in node | |
180 | * | |
181 | * If this routine returns non-null, then the resource is completely | |
182 | * skipped. | |
183 | */ | |
2c5bd01f BH |
184 | static int macio_resource_quirks(struct device_node *np, struct resource *res, |
185 | int index) | |
1da177e4 | 186 | { |
0ebfff14 BH |
187 | /* Only quirks for memory resources for now */ |
188 | if ((res->flags & IORESOURCE_MEM) == 0) | |
189 | return 0; | |
190 | ||
191 | /* Grand Central has too large resource 0 on some machines */ | |
192 | if (index == 0 && !strcmp(np->name, "gc")) | |
193 | res->end = res->start + 0x1ffff; | |
cc5d0189 | 194 | |
0ebfff14 BH |
195 | /* Airport has bogus resource 2 */ |
196 | if (index >= 2 && !strcmp(np->name, "radio")) | |
197 | return 1; | |
cc5d0189 BH |
198 | |
199 | #ifndef CONFIG_PPC64 | |
0ebfff14 BH |
200 | /* DBDMAs may have bogus sizes */ |
201 | if ((res->start & 0x0001f000) == 0x00008000) | |
202 | res->end = res->start + 0xff; | |
cc5d0189 BH |
203 | #endif /* CONFIG_PPC64 */ |
204 | ||
0ebfff14 BH |
205 | /* ESCC parent eats child resources. We could have added a |
206 | * level of hierarchy, but I don't really feel the need | |
207 | * for it | |
208 | */ | |
209 | if (!strcmp(np->name, "escc")) | |
210 | return 1; | |
211 | ||
212 | /* ESCC has bogus resources >= 3 */ | |
213 | if (index >= 3 && !(strcmp(np->name, "ch-a") && | |
214 | strcmp(np->name, "ch-b"))) | |
215 | return 1; | |
216 | ||
217 | /* Media bay has too many resources, keep only first one */ | |
218 | if (index > 0 && !strcmp(np->name, "media-bay")) | |
219 | return 1; | |
220 | ||
221 | /* Some older IDE resources have bogus sizes */ | |
222 | if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") && | |
223 | strcmp(np->type, "ide") && strcmp(np->type, "ata"))) { | |
224 | if (index == 0 && (res->end - res->start) > 0xfff) | |
225 | res->end = res->start + 0xfff; | |
226 | if (index == 1 && (res->end - res->start) > 0xff) | |
227 | res->end = res->start + 0xff; | |
1da177e4 LT |
228 | } |
229 | return 0; | |
230 | } | |
231 | ||
0ebfff14 BH |
232 | static void macio_create_fixup_irq(struct macio_dev *dev, int index, |
233 | unsigned int line) | |
234 | { | |
235 | unsigned int irq; | |
1da177e4 | 236 | |
6e99e458 | 237 | irq = irq_create_mapping(NULL, line); |
0ebfff14 BH |
238 | if (irq != NO_IRQ) { |
239 | dev->interrupt[index].start = irq; | |
240 | dev->interrupt[index].flags = IORESOURCE_IRQ; | |
1d7e6cca | 241 | dev->interrupt[index].name = dev_name(&dev->ofdev.dev); |
0ebfff14 BH |
242 | } |
243 | if (dev->n_interrupts <= index) | |
244 | dev->n_interrupts = index + 1; | |
245 | } | |
246 | ||
247 | static void macio_add_missing_resources(struct macio_dev *dev) | |
2c5bd01f | 248 | { |
61c7a080 | 249 | struct device_node *np = dev->ofdev.dev.of_node; |
0ebfff14 BH |
250 | unsigned int irq_base; |
251 | ||
252 | /* Gatwick has some missing interrupts on child nodes */ | |
253 | if (dev->bus->chip->type != macio_gatwick) | |
254 | return; | |
2c5bd01f | 255 | |
0ebfff14 BH |
256 | /* irq_base is always 64 on gatwick. I have no cleaner way to get |
257 | * that value from here at this point | |
2c5bd01f | 258 | */ |
0ebfff14 BH |
259 | irq_base = 64; |
260 | ||
261 | /* Fix SCC */ | |
262 | if (strcmp(np->name, "ch-a") == 0) { | |
263 | macio_create_fixup_irq(dev, 0, 15 + irq_base); | |
264 | macio_create_fixup_irq(dev, 1, 4 + irq_base); | |
265 | macio_create_fixup_irq(dev, 2, 5 + irq_base); | |
266 | printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n"); | |
267 | } | |
268 | ||
269 | /* Fix media-bay */ | |
270 | if (strcmp(np->name, "media-bay") == 0) { | |
271 | macio_create_fixup_irq(dev, 0, 29 + irq_base); | |
272 | printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n"); | |
273 | } | |
274 | ||
275 | /* Fix left media bay childs */ | |
276 | if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) { | |
277 | macio_create_fixup_irq(dev, 0, 19 + irq_base); | |
278 | macio_create_fixup_irq(dev, 1, 1 + irq_base); | |
279 | printk(KERN_INFO "macio: fixed left floppy irqs\n"); | |
280 | } | |
281 | if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) { | |
282 | macio_create_fixup_irq(dev, 0, 14 + irq_base); | |
283 | macio_create_fixup_irq(dev, 0, 3 + irq_base); | |
284 | printk(KERN_INFO "macio: fixed left ide irqs\n"); | |
285 | } | |
286 | } | |
287 | ||
288 | static void macio_setup_interrupts(struct macio_dev *dev) | |
289 | { | |
61c7a080 | 290 | struct device_node *np = dev->ofdev.dev.of_node; |
0ebfff14 BH |
291 | unsigned int irq; |
292 | int i = 0, j = 0; | |
293 | ||
294 | for (;;) { | |
fb2881a7 | 295 | struct resource *res; |
2c5bd01f BH |
296 | |
297 | if (j >= MACIO_DEV_COUNT_IRQS) | |
298 | break; | |
fb2881a7 | 299 | res = &dev->interrupt[j]; |
0ebfff14 BH |
300 | irq = irq_of_parse_and_map(np, i++); |
301 | if (irq == NO_IRQ) | |
302 | break; | |
303 | res->start = irq; | |
304 | res->flags = IORESOURCE_IRQ; | |
1d7e6cca | 305 | res->name = dev_name(&dev->ofdev.dev); |
0ebfff14 | 306 | if (macio_resource_quirks(np, res, i - 1)) { |
2c5bd01f | 307 | memset(res, 0, sizeof(struct resource)); |
0ebfff14 BH |
308 | continue; |
309 | } else | |
2c5bd01f BH |
310 | j++; |
311 | } | |
312 | dev->n_interrupts = j; | |
313 | } | |
314 | ||
315 | static void macio_setup_resources(struct macio_dev *dev, | |
316 | struct resource *parent_res) | |
317 | { | |
61c7a080 | 318 | struct device_node *np = dev->ofdev.dev.of_node; |
d2dd482b | 319 | struct resource r; |
2c5bd01f BH |
320 | int index; |
321 | ||
d2dd482b | 322 | for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) { |
fb2881a7 | 323 | struct resource *res; |
2c5bd01f BH |
324 | if (index >= MACIO_DEV_COUNT_RESOURCES) |
325 | break; | |
fb2881a7 | 326 | res = &dev->resource[index]; |
d2dd482b | 327 | *res = r; |
1d7e6cca | 328 | res->name = dev_name(&dev->ofdev.dev); |
2c5bd01f BH |
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 | |
cc5d0189 | 337 | */ |
2c5bd01f BH |
338 | if (insert_resource(parent_res, res)) { |
339 | printk(KERN_WARNING "Can't request resource " | |
340 | "%d for MacIO device %s\n", | |
1d7e6cca | 341 | index, dev_name(&dev->ofdev.dev)); |
2c5bd01f BH |
342 | } |
343 | } | |
344 | dev->n_resources = index; | |
345 | } | |
346 | ||
1da177e4 LT |
347 | /** |
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 | */ | |
2c5bd01f BH |
356 | static struct macio_dev * macio_add_one_device(struct macio_chip *chip, |
357 | struct device *parent, | |
358 | struct device_node *np, | |
359 | struct macio_dev *in_bay, | |
1da177e4 LT |
360 | struct resource *parent_res) |
361 | { | |
362 | struct macio_dev *dev; | |
018a3d1d | 363 | const u32 *reg; |
1da177e4 LT |
364 | |
365 | if (np == NULL) | |
366 | return NULL; | |
367 | ||
dd00cc48 | 368 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1da177e4 LT |
369 | if (!dev) |
370 | return NULL; | |
1da177e4 LT |
371 | |
372 | dev->bus = &chip->lbus; | |
373 | dev->media_bay = in_bay; | |
61c7a080 | 374 | dev->ofdev.dev.of_node = np; |
cb6dc512 GL |
375 | dev->ofdev.archdata.dma_mask = 0xffffffffUL; |
376 | dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask; | |
1da177e4 LT |
377 | dev->ofdev.dev.parent = parent; |
378 | dev->ofdev.dev.bus = &macio_bus_type; | |
379 | dev->ofdev.dev.release = macio_release_dev; | |
128b4a0e BH |
380 | dev->ofdev.dev.dma_parms = &dev->dma_parms; |
381 | ||
382 | /* Standard DMA paremeters */ | |
383 | dma_set_max_seg_size(&dev->ofdev.dev, 65536); | |
384 | dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff); | |
1da177e4 | 385 | |
3514141a BH |
386 | #ifdef CONFIG_PCI |
387 | /* Set the DMA ops to the ones from the PCI device, this could be | |
388 | * fishy if we didn't know that on PowerMac it's always direct ops | |
389 | * or iommu ops that will work fine | |
390 | */ | |
391 | dev->ofdev.dev.archdata.dma_ops = | |
392 | chip->lbus.pdev->dev.archdata.dma_ops; | |
393 | dev->ofdev.dev.archdata.dma_data = | |
394 | chip->lbus.pdev->dev.archdata.dma_data; | |
395 | #endif /* CONFIG_PCI */ | |
396 | ||
1da177e4 LT |
397 | #ifdef DEBUG |
398 | printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n", | |
399 | dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj); | |
400 | #endif | |
401 | ||
402 | /* MacIO itself has a different reg, we use it's PCI base */ | |
403 | if (np == chip->of_node) { | |
1d7e6cca KS |
404 | dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s", |
405 | chip->lbus.index, | |
1da177e4 | 406 | #ifdef CONFIG_PCI |
d63fb6c5 | 407 | (unsigned int)pci_resource_start(chip->lbus.pdev, 0), |
1da177e4 LT |
408 | #else |
409 | 0, /* NuBus may want to do something better here */ | |
410 | #endif | |
411 | MAX_NODE_NAME_SIZE, np->name); | |
412 | } else { | |
01b2726d | 413 | reg = of_get_property(np, "reg", NULL); |
1d7e6cca KS |
414 | dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s", |
415 | chip->lbus.index, | |
416 | reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name); | |
1da177e4 LT |
417 | } |
418 | ||
2c5bd01f BH |
419 | /* Setup interrupts & resources */ |
420 | macio_setup_interrupts(dev); | |
421 | macio_setup_resources(dev, parent_res); | |
0ebfff14 | 422 | macio_add_missing_resources(dev); |
1da177e4 | 423 | |
2c5bd01f | 424 | /* Register with core */ |
1da177e4 LT |
425 | if (of_device_register(&dev->ofdev) != 0) { |
426 | printk(KERN_DEBUG"macio: device registration error for %s!\n", | |
1d7e6cca | 427 | dev_name(&dev->ofdev.dev)); |
1da177e4 LT |
428 | kfree(dev); |
429 | return NULL; | |
430 | } | |
431 | ||
432 | return dev; | |
433 | } | |
434 | ||
435 | static int macio_skip_device(struct device_node *np) | |
436 | { | |
437 | if (strncmp(np->name, "battery", 7) == 0) | |
438 | return 1; | |
439 | if (strncmp(np->name, "escc-legacy", 11) == 0) | |
440 | return 1; | |
441 | return 0; | |
442 | } | |
443 | ||
444 | /** | |
445 | * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree | |
446 | * @chip: pointer to the macio_chip holding the devices | |
447 | * | |
448 | * This function will do the job of extracting devices from the | |
449 | * Open Firmware device tree, build macio_dev structures and add | |
450 | * them to the Linux device tree. | |
451 | * | |
452 | * For now, childs of media-bay are added now as well. This will | |
453 | * change rsn though. | |
454 | */ | |
455 | static void macio_pci_add_devices(struct macio_chip *chip) | |
456 | { | |
457 | struct device_node *np, *pnode; | |
458 | struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL; | |
459 | struct device *parent = NULL; | |
460 | struct resource *root_res = &iomem_resource; | |
461 | ||
462 | /* Add a node for the macio bus itself */ | |
463 | #ifdef CONFIG_PCI | |
464 | if (chip->lbus.pdev) { | |
465 | parent = &chip->lbus.pdev->dev; | |
466 | root_res = &chip->lbus.pdev->resource[0]; | |
467 | } | |
468 | #endif | |
469 | pnode = of_node_get(chip->of_node); | |
470 | if (pnode == NULL) | |
471 | return; | |
472 | ||
473 | /* Add macio itself to hierarchy */ | |
474 | rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res); | |
475 | if (rdev == NULL) | |
476 | return; | |
477 | root_res = &rdev->resource[0]; | |
478 | ||
479 | /* First scan 1st level */ | |
480 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { | |
2c5bd01f BH |
481 | if (macio_skip_device(np)) |
482 | continue; | |
483 | of_node_get(np); | |
484 | mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL, | |
485 | root_res); | |
486 | if (mdev == NULL) | |
487 | of_node_put(np); | |
488 | else if (strncmp(np->name, "media-bay", 9) == 0) | |
489 | mbdev = mdev; | |
490 | else if (strncmp(np->name, "escc", 4) == 0) | |
491 | sdev = mdev; | |
1da177e4 LT |
492 | } |
493 | ||
494 | /* Add media bay devices if any */ | |
61c7a080 | 495 | pnode = mbdev->ofdev.dev.of_node; |
1da177e4 | 496 | if (mbdev) |
61c7a080 | 497 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { |
2c5bd01f BH |
498 | if (macio_skip_device(np)) |
499 | continue; | |
500 | of_node_get(np); | |
501 | if (macio_add_one_device(chip, &mbdev->ofdev.dev, np, | |
502 | mbdev, root_res) == NULL) | |
503 | of_node_put(np); | |
504 | } | |
505 | ||
1da177e4 | 506 | /* Add serial ports if any */ |
61c7a080 | 507 | pnode = sdev->ofdev.dev.of_node; |
1da177e4 | 508 | if (sdev) { |
61c7a080 | 509 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { |
2c5bd01f BH |
510 | if (macio_skip_device(np)) |
511 | continue; | |
512 | of_node_get(np); | |
513 | if (macio_add_one_device(chip, &sdev->ofdev.dev, np, | |
514 | NULL, root_res) == NULL) | |
515 | of_node_put(np); | |
516 | } | |
1da177e4 LT |
517 | } |
518 | } | |
519 | ||
520 | ||
521 | /** | |
522 | * macio_register_driver - Registers a new MacIO device driver | |
523 | * @drv: pointer to the driver definition structure | |
524 | */ | |
525 | int macio_register_driver(struct macio_driver *drv) | |
526 | { | |
1da177e4 LT |
527 | /* initialize common driver fields */ |
528 | drv->driver.name = drv->name; | |
529 | drv->driver.bus = &macio_bus_type; | |
1da177e4 LT |
530 | |
531 | /* register with core */ | |
d56a3e38 | 532 | return driver_register(&drv->driver); |
1da177e4 LT |
533 | } |
534 | ||
535 | /** | |
536 | * macio_unregister_driver - Unregisters a new MacIO device driver | |
537 | * @drv: pointer to the driver definition structure | |
538 | */ | |
539 | void macio_unregister_driver(struct macio_driver *drv) | |
540 | { | |
541 | driver_unregister(&drv->driver); | |
542 | } | |
543 | ||
7fb19ea0 BH |
544 | /* Managed MacIO resources */ |
545 | struct macio_devres { | |
546 | u32 res_mask; | |
547 | }; | |
548 | ||
549 | static void maciom_release(struct device *gendev, void *res) | |
550 | { | |
551 | struct macio_dev *dev = to_macio_device(gendev); | |
552 | struct macio_devres *dr = res; | |
553 | int i, max; | |
554 | ||
555 | max = min(dev->n_resources, 32); | |
556 | for (i = 0; i < max; i++) { | |
557 | if (dr->res_mask & (1 << i)) | |
558 | macio_release_resource(dev, i); | |
559 | } | |
560 | } | |
561 | ||
562 | int macio_enable_devres(struct macio_dev *dev) | |
563 | { | |
564 | struct macio_devres *dr; | |
565 | ||
566 | dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL); | |
567 | if (!dr) { | |
568 | dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL); | |
569 | if (!dr) | |
570 | return -ENOMEM; | |
571 | } | |
572 | return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL; | |
573 | } | |
574 | ||
575 | static struct macio_devres * find_macio_dr(struct macio_dev *dev) | |
576 | { | |
577 | return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL); | |
578 | } | |
579 | ||
1da177e4 LT |
580 | /** |
581 | * macio_request_resource - Request an MMIO resource | |
582 | * @dev: pointer to the device holding the resource | |
583 | * @resource_no: resource number to request | |
584 | * @name: resource name | |
585 | * | |
586 | * Mark memory region number @resource_no associated with MacIO | |
587 | * device @dev as being reserved by owner @name. Do not access | |
588 | * any address inside the memory regions unless this call returns | |
589 | * successfully. | |
590 | * | |
591 | * Returns 0 on success, or %EBUSY on error. A warning | |
592 | * message is also printed on failure. | |
593 | */ | |
2c5bd01f BH |
594 | int macio_request_resource(struct macio_dev *dev, int resource_no, |
595 | const char *name) | |
1da177e4 | 596 | { |
7fb19ea0 BH |
597 | struct macio_devres *dr = find_macio_dr(dev); |
598 | ||
1da177e4 LT |
599 | if (macio_resource_len(dev, resource_no) == 0) |
600 | return 0; | |
601 | ||
602 | if (!request_mem_region(macio_resource_start(dev, resource_no), | |
603 | macio_resource_len(dev, resource_no), | |
604 | name)) | |
605 | goto err_out; | |
7fb19ea0 BH |
606 | |
607 | if (dr && resource_no < 32) | |
608 | dr->res_mask |= 1 << resource_no; | |
1da177e4 LT |
609 | |
610 | return 0; | |
611 | ||
612 | err_out: | |
613 | printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx" | |
614 | " for device %s\n", | |
615 | resource_no, | |
616 | macio_resource_len(dev, resource_no), | |
617 | macio_resource_start(dev, resource_no), | |
1d7e6cca | 618 | dev_name(&dev->ofdev.dev)); |
1da177e4 LT |
619 | return -EBUSY; |
620 | } | |
621 | ||
622 | /** | |
623 | * macio_release_resource - Release an MMIO resource | |
624 | * @dev: pointer to the device holding the resource | |
625 | * @resource_no: resource number to release | |
626 | */ | |
627 | void macio_release_resource(struct macio_dev *dev, int resource_no) | |
628 | { | |
7fb19ea0 BH |
629 | struct macio_devres *dr = find_macio_dr(dev); |
630 | ||
1da177e4 LT |
631 | if (macio_resource_len(dev, resource_no) == 0) |
632 | return; | |
633 | release_mem_region(macio_resource_start(dev, resource_no), | |
634 | macio_resource_len(dev, resource_no)); | |
7fb19ea0 BH |
635 | if (dr && resource_no < 32) |
636 | dr->res_mask &= ~(1 << resource_no); | |
1da177e4 LT |
637 | } |
638 | ||
639 | /** | |
640 | * macio_request_resources - Reserve all memory resources | |
641 | * @dev: MacIO device whose resources are to be reserved | |
642 | * @name: Name to be associated with resource. | |
643 | * | |
644 | * Mark all memory regions associated with MacIO device @dev as | |
645 | * being reserved by owner @name. Do not access any address inside | |
646 | * the memory regions unless this call returns successfully. | |
647 | * | |
648 | * Returns 0 on success, or %EBUSY on error. A warning | |
649 | * message is also printed on failure. | |
650 | */ | |
651 | int macio_request_resources(struct macio_dev *dev, const char *name) | |
652 | { | |
653 | int i; | |
654 | ||
655 | for (i = 0; i < dev->n_resources; i++) | |
656 | if (macio_request_resource(dev, i, name)) | |
657 | goto err_out; | |
658 | return 0; | |
659 | ||
660 | err_out: | |
661 | while(--i >= 0) | |
662 | macio_release_resource(dev, i); | |
663 | ||
664 | return -EBUSY; | |
665 | } | |
666 | ||
667 | /** | |
668 | * macio_release_resources - Release reserved memory resources | |
669 | * @dev: MacIO device whose resources were previously reserved | |
670 | */ | |
671 | ||
672 | void macio_release_resources(struct macio_dev *dev) | |
673 | { | |
674 | int i; | |
675 | ||
676 | for (i = 0; i < dev->n_resources; i++) | |
677 | macio_release_resource(dev, i); | |
678 | } | |
679 | ||
680 | ||
681 | #ifdef CONFIG_PCI | |
682 | ||
683 | static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
684 | { | |
685 | struct device_node* np; | |
686 | struct macio_chip* chip; | |
687 | ||
688 | if (ent->vendor != PCI_VENDOR_ID_APPLE) | |
689 | return -ENODEV; | |
690 | ||
2c5bd01f BH |
691 | /* Note regarding refcounting: We assume pci_device_to_OF_node() is |
692 | * ported to new OF APIs and returns a node with refcount incremented. | |
1da177e4 LT |
693 | */ |
694 | np = pci_device_to_OF_node(pdev); | |
695 | if (np == NULL) | |
696 | return -ENODEV; | |
697 | ||
2c5bd01f BH |
698 | /* The above assumption is wrong !!! |
699 | * fix that here for now until I fix the arch code | |
700 | */ | |
1da177e4 LT |
701 | of_node_get(np); |
702 | ||
2c5bd01f BH |
703 | /* We also assume that pmac_feature will have done a get() on nodes |
704 | * stored in the macio chips array | |
1da177e4 LT |
705 | */ |
706 | chip = macio_find(np, macio_unknown); | |
707 | of_node_put(np); | |
708 | if (chip == NULL) | |
709 | return -ENODEV; | |
710 | ||
711 | /* XXX Need locking ??? */ | |
712 | if (chip->lbus.pdev == NULL) { | |
713 | chip->lbus.pdev = pdev; | |
714 | chip->lbus.chip = chip; | |
715 | pci_set_drvdata(pdev, &chip->lbus); | |
716 | pci_set_master(pdev); | |
717 | } | |
718 | ||
719 | printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n", | |
720 | chip->name); | |
721 | ||
722 | /* | |
723 | * HACK ALERT: The WallStreet PowerBook and some OHare based machines | |
2c5bd01f BH |
724 | * have 2 macio ASICs. I must probe the "main" one first or IDE |
725 | * ordering will be incorrect. So I put on "hold" the second one since | |
726 | * it seem to appear first on PCI | |
1da177e4 LT |
727 | */ |
728 | if (chip->type == macio_gatwick || chip->type == macio_ohareII) | |
729 | if (macio_chips[0].lbus.pdev == NULL) { | |
730 | macio_on_hold = chip; | |
731 | return 0; | |
732 | } | |
733 | ||
734 | macio_pci_add_devices(chip); | |
735 | if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) { | |
736 | macio_pci_add_devices(macio_on_hold); | |
737 | macio_on_hold = NULL; | |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
743 | static void __devexit macio_pci_remove(struct pci_dev* pdev) | |
744 | { | |
745 | panic("removing of macio-asic not supported !\n"); | |
746 | } | |
747 | ||
748 | /* | |
749 | * MacIO is matched against any Apple ID, it's probe() function | |
750 | * will then decide wether it applies or not | |
751 | */ | |
752 | static const struct pci_device_id __devinitdata pci_ids [] = { { | |
753 | .vendor = PCI_VENDOR_ID_APPLE, | |
754 | .device = PCI_ANY_ID, | |
755 | .subvendor = PCI_ANY_ID, | |
756 | .subdevice = PCI_ANY_ID, | |
757 | ||
758 | }, { /* end: all zeroes */ } | |
759 | }; | |
760 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
761 | ||
762 | /* pci driver glue; this is a "new style" PCI driver module */ | |
763 | static struct pci_driver macio_pci_driver = { | |
764 | .name = (char *) "macio", | |
765 | .id_table = pci_ids, | |
766 | ||
767 | .probe = macio_pci_probe, | |
768 | .remove = macio_pci_remove, | |
769 | }; | |
770 | ||
771 | #endif /* CONFIG_PCI */ | |
772 | ||
773 | static int __init macio_module_init (void) | |
774 | { | |
775 | #ifdef CONFIG_PCI | |
776 | int rc; | |
777 | ||
778 | rc = pci_register_driver(&macio_pci_driver); | |
779 | if (rc) | |
780 | return rc; | |
781 | #endif /* CONFIG_PCI */ | |
782 | return 0; | |
783 | } | |
784 | ||
785 | module_init(macio_module_init); | |
786 | ||
787 | EXPORT_SYMBOL(macio_register_driver); | |
788 | EXPORT_SYMBOL(macio_unregister_driver); | |
789 | EXPORT_SYMBOL(macio_dev_get); | |
790 | EXPORT_SYMBOL(macio_dev_put); | |
791 | EXPORT_SYMBOL(macio_request_resource); | |
792 | EXPORT_SYMBOL(macio_release_resource); | |
793 | EXPORT_SYMBOL(macio_request_resources); | |
794 | EXPORT_SYMBOL(macio_release_resources); | |
7fb19ea0 BH |
795 | EXPORT_SYMBOL(macio_enable_devres); |
796 |