Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Bus & driver management routines for devices within | |
4 | * a MacIO ASIC. Interface to new driver model mostly | |
5 | * stolen from the PCI version. | |
6 | * | |
2c5bd01f BH |
7 | * Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org) |
8 | * | |
1da177e4 LT |
9 | * TODO: |
10 | * | |
11 | * - Don't probe below media bay by default, but instead provide | |
12 | * some hooks for media bay to dynamically add/remove it's own | |
13 | * sub-devices. | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/string.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/pci.h> | |
19 | #include <linux/pci_ids.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/module.h> | |
4e57b681 | 22 | #include <linux/slab.h> |
5af50730 RH |
23 | #include <linux/of_address.h> |
24 | #include <linux/of_irq.h> | |
4e57b681 | 25 | |
1da177e4 LT |
26 | #include <asm/machdep.h> |
27 | #include <asm/macio.h> | |
28 | #include <asm/pmac_feature.h> | |
29 | #include <asm/prom.h> | |
1da177e4 LT |
30 | |
31 | #undef DEBUG | |
32 | ||
1d7e6cca | 33 | #define MAX_NODE_NAME_SIZE (20 - 12) |
1da177e4 LT |
34 | |
35 | static struct macio_chip *macio_on_hold; | |
36 | ||
37 | static int macio_bus_match(struct device *dev, struct device_driver *drv) | |
38 | { | |
597b9d1e | 39 | const struct of_device_id * matches = drv->of_match_table; |
1da177e4 LT |
40 | |
41 | if (!matches) | |
42 | return 0; | |
43 | ||
44504b2b | 44 | return of_match_device(matches, dev) != NULL; |
1da177e4 LT |
45 | } |
46 | ||
47 | struct macio_dev *macio_dev_get(struct macio_dev *dev) | |
48 | { | |
49 | struct device *tmp; | |
50 | ||
51 | if (!dev) | |
52 | return NULL; | |
53 | tmp = get_device(&dev->ofdev.dev); | |
54 | if (tmp) | |
55 | return to_macio_device(tmp); | |
56 | else | |
57 | return NULL; | |
58 | } | |
59 | ||
60 | void macio_dev_put(struct macio_dev *dev) | |
61 | { | |
62 | if (dev) | |
63 | put_device(&dev->ofdev.dev); | |
64 | } | |
65 | ||
66 | ||
67 | static int macio_device_probe(struct device *dev) | |
68 | { | |
69 | int error = -ENODEV; | |
70 | struct macio_driver *drv; | |
71 | struct macio_dev *macio_dev; | |
5e655772 | 72 | const struct of_device_id *match; |
1da177e4 LT |
73 | |
74 | drv = to_macio_driver(dev->driver); | |
75 | macio_dev = to_macio_device(dev); | |
76 | ||
77 | if (!drv->probe) | |
78 | return error; | |
79 | ||
80 | macio_dev_get(macio_dev); | |
81 | ||
44504b2b | 82 | match = of_match_device(drv->driver.of_match_table, dev); |
1da177e4 LT |
83 | if (match) |
84 | error = drv->probe(macio_dev, match); | |
85 | if (error) | |
86 | macio_dev_put(macio_dev); | |
87 | ||
88 | return error; | |
89 | } | |
90 | ||
91 | static int macio_device_remove(struct device *dev) | |
92 | { | |
93 | struct macio_dev * macio_dev = to_macio_device(dev); | |
94 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
95 | ||
96 | if (dev->driver && drv->remove) | |
97 | drv->remove(macio_dev); | |
98 | macio_dev_put(macio_dev); | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static void macio_device_shutdown(struct device *dev) | |
104 | { | |
105 | struct macio_dev * macio_dev = to_macio_device(dev); | |
106 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
107 | ||
108 | if (dev->driver && drv->shutdown) | |
109 | drv->shutdown(macio_dev); | |
110 | } | |
111 | ||
f4513904 | 112 | static int macio_device_suspend(struct device *dev, pm_message_t state) |
1da177e4 LT |
113 | { |
114 | struct macio_dev * macio_dev = to_macio_device(dev); | |
115 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
116 | ||
117 | if (dev->driver && drv->suspend) | |
118 | return drv->suspend(macio_dev, state); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static int macio_device_resume(struct device * dev) | |
123 | { | |
124 | struct macio_dev * macio_dev = to_macio_device(dev); | |
125 | struct macio_driver * drv = to_macio_driver(dev->driver); | |
126 | ||
127 | if (dev->driver && drv->resume) | |
128 | return drv->resume(macio_dev); | |
129 | return 0; | |
130 | } | |
131 | ||
60bb70aa | 132 | extern const struct attribute_group *macio_dev_groups[]; |
b5bf5b67 | 133 | |
1da177e4 LT |
134 | struct bus_type macio_bus_type = { |
135 | .name = "macio", | |
136 | .match = macio_bus_match, | |
07d57a32 | 137 | .uevent = of_device_uevent_modalias, |
4866b124 RK |
138 | .probe = macio_device_probe, |
139 | .remove = macio_device_remove, | |
140 | .shutdown = macio_device_shutdown, | |
1da177e4 LT |
141 | .suspend = macio_device_suspend, |
142 | .resume = macio_device_resume, | |
60bb70aa | 143 | .dev_groups = macio_dev_groups, |
1da177e4 LT |
144 | }; |
145 | ||
146 | static int __init macio_bus_driver_init(void) | |
147 | { | |
148 | return bus_register(&macio_bus_type); | |
149 | } | |
150 | ||
151 | postcore_initcall(macio_bus_driver_init); | |
152 | ||
153 | ||
154 | /** | |
2c5bd01f BH |
155 | * macio_release_dev - free a macio device structure when all users of it are |
156 | * finished. | |
1da177e4 LT |
157 | * @dev: device that's been disconnected |
158 | * | |
2c5bd01f BH |
159 | * Will be called only by the device core when all users of this macio device |
160 | * are done. This currently means never as we don't hot remove any macio | |
161 | * device yet, though that will happen with mediabay based devices in a later | |
162 | * implementation. | |
1da177e4 LT |
163 | */ |
164 | static void macio_release_dev(struct device *dev) | |
165 | { | |
166 | struct macio_dev *mdev; | |
167 | ||
168 | mdev = to_macio_device(dev); | |
169 | kfree(mdev); | |
170 | } | |
171 | ||
172 | /** | |
173 | * macio_resource_quirks - tweak or skip some resources for a device | |
174 | * @np: pointer to the device node | |
175 | * @res: resulting resource | |
176 | * @index: index of resource in node | |
177 | * | |
178 | * If this routine returns non-null, then the resource is completely | |
179 | * skipped. | |
180 | */ | |
2c5bd01f BH |
181 | static int macio_resource_quirks(struct device_node *np, struct resource *res, |
182 | int index) | |
1da177e4 | 183 | { |
0ebfff14 BH |
184 | /* Only quirks for memory resources for now */ |
185 | if ((res->flags & IORESOURCE_MEM) == 0) | |
186 | return 0; | |
187 | ||
188 | /* Grand Central has too large resource 0 on some machines */ | |
f1e0addc | 189 | if (index == 0 && of_node_name_eq(np, "gc")) |
0ebfff14 | 190 | res->end = res->start + 0x1ffff; |
cc5d0189 | 191 | |
0ebfff14 | 192 | /* Airport has bogus resource 2 */ |
f1e0addc | 193 | if (index >= 2 && of_node_name_eq(np, "radio")) |
0ebfff14 | 194 | return 1; |
cc5d0189 BH |
195 | |
196 | #ifndef CONFIG_PPC64 | |
0ebfff14 BH |
197 | /* DBDMAs may have bogus sizes */ |
198 | if ((res->start & 0x0001f000) == 0x00008000) | |
199 | res->end = res->start + 0xff; | |
cc5d0189 BH |
200 | #endif /* CONFIG_PPC64 */ |
201 | ||
0ebfff14 BH |
202 | /* ESCC parent eats child resources. We could have added a |
203 | * level of hierarchy, but I don't really feel the need | |
204 | * for it | |
205 | */ | |
f1e0addc | 206 | if (of_node_name_eq(np, "escc")) |
0ebfff14 BH |
207 | return 1; |
208 | ||
209 | /* ESCC has bogus resources >= 3 */ | |
f1e0addc RH |
210 | if (index >= 3 && (of_node_name_eq(np, "ch-a") || |
211 | of_node_name_eq(np, "ch-b"))) | |
0ebfff14 BH |
212 | return 1; |
213 | ||
214 | /* Media bay has too many resources, keep only first one */ | |
f1e0addc | 215 | if (index > 0 && of_node_name_eq(np, "media-bay")) |
0ebfff14 BH |
216 | return 1; |
217 | ||
218 | /* Some older IDE resources have bogus sizes */ | |
f1e0addc | 219 | if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") || |
bf82d375 | 220 | of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) { |
0ebfff14 BH |
221 | if (index == 0 && (res->end - res->start) > 0xfff) |
222 | res->end = res->start + 0xfff; | |
223 | if (index == 1 && (res->end - res->start) > 0xff) | |
224 | res->end = res->start + 0xff; | |
1da177e4 LT |
225 | } |
226 | return 0; | |
227 | } | |
228 | ||
0ebfff14 BH |
229 | static void macio_create_fixup_irq(struct macio_dev *dev, int index, |
230 | unsigned int line) | |
231 | { | |
232 | unsigned int irq; | |
1da177e4 | 233 | |
6e99e458 | 234 | irq = irq_create_mapping(NULL, line); |
ef24ba70 | 235 | if (!irq) { |
0ebfff14 BH |
236 | dev->interrupt[index].start = irq; |
237 | dev->interrupt[index].flags = IORESOURCE_IRQ; | |
1d7e6cca | 238 | dev->interrupt[index].name = dev_name(&dev->ofdev.dev); |
0ebfff14 BH |
239 | } |
240 | if (dev->n_interrupts <= index) | |
241 | dev->n_interrupts = index + 1; | |
242 | } | |
243 | ||
244 | static void macio_add_missing_resources(struct macio_dev *dev) | |
2c5bd01f | 245 | { |
61c7a080 | 246 | struct device_node *np = dev->ofdev.dev.of_node; |
0ebfff14 BH |
247 | unsigned int irq_base; |
248 | ||
249 | /* Gatwick has some missing interrupts on child nodes */ | |
250 | if (dev->bus->chip->type != macio_gatwick) | |
251 | return; | |
2c5bd01f | 252 | |
0ebfff14 BH |
253 | /* irq_base is always 64 on gatwick. I have no cleaner way to get |
254 | * that value from here at this point | |
2c5bd01f | 255 | */ |
0ebfff14 BH |
256 | irq_base = 64; |
257 | ||
258 | /* Fix SCC */ | |
f1e0addc | 259 | if (of_node_name_eq(np, "ch-a")) { |
0ebfff14 BH |
260 | macio_create_fixup_irq(dev, 0, 15 + irq_base); |
261 | macio_create_fixup_irq(dev, 1, 4 + irq_base); | |
262 | macio_create_fixup_irq(dev, 2, 5 + irq_base); | |
263 | printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n"); | |
264 | } | |
265 | ||
266 | /* Fix media-bay */ | |
f1e0addc | 267 | if (of_node_name_eq(np, "media-bay")) { |
0ebfff14 BH |
268 | macio_create_fixup_irq(dev, 0, 29 + irq_base); |
269 | printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n"); | |
270 | } | |
271 | ||
272 | /* Fix left media bay childs */ | |
f1e0addc | 273 | if (dev->media_bay != NULL && of_node_name_eq(np, "floppy")) { |
0ebfff14 BH |
274 | macio_create_fixup_irq(dev, 0, 19 + irq_base); |
275 | macio_create_fixup_irq(dev, 1, 1 + irq_base); | |
276 | printk(KERN_INFO "macio: fixed left floppy irqs\n"); | |
277 | } | |
f1e0addc | 278 | if (dev->media_bay != NULL && of_node_name_eq(np, "ata4")) { |
0ebfff14 BH |
279 | macio_create_fixup_irq(dev, 0, 14 + irq_base); |
280 | macio_create_fixup_irq(dev, 0, 3 + irq_base); | |
281 | printk(KERN_INFO "macio: fixed left ide irqs\n"); | |
282 | } | |
283 | } | |
284 | ||
285 | static void macio_setup_interrupts(struct macio_dev *dev) | |
286 | { | |
61c7a080 | 287 | struct device_node *np = dev->ofdev.dev.of_node; |
0ebfff14 BH |
288 | unsigned int irq; |
289 | int i = 0, j = 0; | |
290 | ||
291 | for (;;) { | |
fb2881a7 | 292 | struct resource *res; |
2c5bd01f BH |
293 | |
294 | if (j >= MACIO_DEV_COUNT_IRQS) | |
295 | break; | |
fb2881a7 | 296 | res = &dev->interrupt[j]; |
0ebfff14 | 297 | irq = irq_of_parse_and_map(np, i++); |
ef24ba70 | 298 | if (!irq) |
0ebfff14 BH |
299 | break; |
300 | res->start = irq; | |
301 | res->flags = IORESOURCE_IRQ; | |
1d7e6cca | 302 | res->name = dev_name(&dev->ofdev.dev); |
0ebfff14 | 303 | if (macio_resource_quirks(np, res, i - 1)) { |
2c5bd01f | 304 | memset(res, 0, sizeof(struct resource)); |
0ebfff14 BH |
305 | continue; |
306 | } else | |
2c5bd01f BH |
307 | j++; |
308 | } | |
309 | dev->n_interrupts = j; | |
310 | } | |
311 | ||
312 | static void macio_setup_resources(struct macio_dev *dev, | |
313 | struct resource *parent_res) | |
314 | { | |
61c7a080 | 315 | struct device_node *np = dev->ofdev.dev.of_node; |
d2dd482b | 316 | struct resource r; |
2c5bd01f BH |
317 | int index; |
318 | ||
d2dd482b | 319 | for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) { |
fb2881a7 | 320 | struct resource *res; |
2c5bd01f BH |
321 | if (index >= MACIO_DEV_COUNT_RESOURCES) |
322 | break; | |
fb2881a7 | 323 | res = &dev->resource[index]; |
d2dd482b | 324 | *res = r; |
1d7e6cca | 325 | res->name = dev_name(&dev->ofdev.dev); |
2c5bd01f BH |
326 | |
327 | if (macio_resource_quirks(np, res, index)) { | |
328 | memset(res, 0, sizeof(struct resource)); | |
329 | continue; | |
330 | } | |
331 | /* Currently, we consider failure as harmless, this may | |
332 | * change in the future, once I've found all the device | |
333 | * tree bugs in older machines & worked around them | |
cc5d0189 | 334 | */ |
2c5bd01f BH |
335 | if (insert_resource(parent_res, res)) { |
336 | printk(KERN_WARNING "Can't request resource " | |
337 | "%d for MacIO device %s\n", | |
1d7e6cca | 338 | index, dev_name(&dev->ofdev.dev)); |
2c5bd01f BH |
339 | } |
340 | } | |
341 | dev->n_resources = index; | |
342 | } | |
343 | ||
1da177e4 LT |
344 | /** |
345 | * macio_add_one_device - Add one device from OF node to the device tree | |
346 | * @chip: pointer to the macio_chip holding the device | |
347 | * @np: pointer to the device node in the OF tree | |
348 | * @in_bay: set to 1 if device is part of a media-bay | |
349 | * | |
350 | * When media-bay is changed to hotswap drivers, this function will | |
351 | * be exposed to the bay driver some way... | |
352 | */ | |
2c5bd01f BH |
353 | static struct macio_dev * macio_add_one_device(struct macio_chip *chip, |
354 | struct device *parent, | |
355 | struct device_node *np, | |
356 | struct macio_dev *in_bay, | |
1da177e4 LT |
357 | struct resource *parent_res) |
358 | { | |
0bdba867 | 359 | char name[MAX_NODE_NAME_SIZE + 1]; |
1da177e4 | 360 | struct macio_dev *dev; |
018a3d1d | 361 | const u32 *reg; |
0bdba867 | 362 | |
1da177e4 LT |
363 | if (np == NULL) |
364 | return NULL; | |
365 | ||
dd00cc48 | 366 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1da177e4 LT |
367 | if (!dev) |
368 | return NULL; | |
1da177e4 LT |
369 | |
370 | dev->bus = &chip->lbus; | |
371 | dev->media_bay = in_bay; | |
61c7a080 | 372 | dev->ofdev.dev.of_node = np; |
cb6dc512 GL |
373 | dev->ofdev.archdata.dma_mask = 0xffffffffUL; |
374 | dev->ofdev.dev.dma_mask = &dev->ofdev.archdata.dma_mask; | |
7bcfab20 | 375 | dev->ofdev.dev.coherent_dma_mask = dev->ofdev.archdata.dma_mask; |
1da177e4 LT |
376 | dev->ofdev.dev.parent = parent; |
377 | dev->ofdev.dev.bus = &macio_bus_type; | |
378 | dev->ofdev.dev.release = macio_release_dev; | |
128b4a0e BH |
379 | dev->ofdev.dev.dma_parms = &dev->dma_parms; |
380 | ||
381 | /* Standard DMA paremeters */ | |
382 | dma_set_max_seg_size(&dev->ofdev.dev, 65536); | |
383 | dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff); | |
1da177e4 | 384 | |
2f9237d4 | 385 | #if defined(CONFIG_PCI) && defined(CONFIG_DMA_OPS) |
3514141a BH |
386 | /* Set the DMA ops to the ones from the PCI device, this could be |
387 | * fishy if we didn't know that on PowerMac it's always direct ops | |
388 | * or iommu ops that will work fine | |
f6aedd86 NA |
389 | * |
390 | * To get all the fields, copy all archdata | |
3514141a | 391 | */ |
f6aedd86 | 392 | dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata; |
46f401c4 | 393 | dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops; |
2f9237d4 | 394 | #endif /* CONFIG_PCI && CONFIG_DMA_OPS */ |
3514141a | 395 | |
1da177e4 LT |
396 | #ifdef DEBUG |
397 | printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n", | |
398 | dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj); | |
399 | #endif | |
400 | ||
401 | /* MacIO itself has a different reg, we use it's PCI base */ | |
0bdba867 | 402 | snprintf(name, sizeof(name), "%pOFn", np); |
1da177e4 | 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 | |
0bdba867 | 411 | MAX_NODE_NAME_SIZE, name); |
1da177e4 | 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, | |
0bdba867 | 416 | reg ? *reg : 0, MAX_NODE_NAME_SIZE, 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 | { | |
f1e0addc RH |
437 | return of_node_name_prefix(np, "battery") || |
438 | of_node_name_prefix(np, "escc-legacy"); | |
1da177e4 LT |
439 | } |
440 | ||
441 | /** | |
442 | * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree | |
443 | * @chip: pointer to the macio_chip holding the devices | |
444 | * | |
445 | * This function will do the job of extracting devices from the | |
446 | * Open Firmware device tree, build macio_dev structures and add | |
447 | * them to the Linux device tree. | |
448 | * | |
449 | * For now, childs of media-bay are added now as well. This will | |
450 | * change rsn though. | |
451 | */ | |
452 | static void macio_pci_add_devices(struct macio_chip *chip) | |
453 | { | |
454 | struct device_node *np, *pnode; | |
455 | struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL; | |
456 | struct device *parent = NULL; | |
457 | struct resource *root_res = &iomem_resource; | |
458 | ||
459 | /* Add a node for the macio bus itself */ | |
460 | #ifdef CONFIG_PCI | |
461 | if (chip->lbus.pdev) { | |
462 | parent = &chip->lbus.pdev->dev; | |
463 | root_res = &chip->lbus.pdev->resource[0]; | |
464 | } | |
465 | #endif | |
466 | pnode = of_node_get(chip->of_node); | |
467 | if (pnode == NULL) | |
468 | return; | |
469 | ||
470 | /* Add macio itself to hierarchy */ | |
471 | rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res); | |
472 | if (rdev == NULL) | |
473 | return; | |
474 | root_res = &rdev->resource[0]; | |
475 | ||
476 | /* First scan 1st level */ | |
477 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { | |
2c5bd01f BH |
478 | if (macio_skip_device(np)) |
479 | continue; | |
480 | of_node_get(np); | |
481 | mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL, | |
482 | root_res); | |
483 | if (mdev == NULL) | |
484 | of_node_put(np); | |
f1e0addc | 485 | else if (of_node_name_prefix(np, "media-bay")) |
2c5bd01f | 486 | mbdev = mdev; |
f1e0addc | 487 | else if (of_node_name_prefix(np, "escc")) |
2c5bd01f | 488 | sdev = mdev; |
1da177e4 LT |
489 | } |
490 | ||
491 | /* Add media bay devices if any */ | |
83aea945 AS |
492 | if (mbdev) { |
493 | pnode = mbdev->ofdev.dev.of_node; | |
61c7a080 | 494 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { |
2c5bd01f BH |
495 | if (macio_skip_device(np)) |
496 | continue; | |
497 | of_node_get(np); | |
498 | if (macio_add_one_device(chip, &mbdev->ofdev.dev, np, | |
499 | mbdev, root_res) == NULL) | |
500 | of_node_put(np); | |
501 | } | |
83aea945 | 502 | } |
2c5bd01f | 503 | |
1da177e4 LT |
504 | /* Add serial ports if any */ |
505 | if (sdev) { | |
83aea945 | 506 | pnode = sdev->ofdev.dev.of_node; |
61c7a080 | 507 | for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) { |
2c5bd01f BH |
508 | if (macio_skip_device(np)) |
509 | continue; | |
510 | of_node_get(np); | |
511 | if (macio_add_one_device(chip, &sdev->ofdev.dev, np, | |
512 | NULL, root_res) == NULL) | |
513 | of_node_put(np); | |
514 | } | |
1da177e4 LT |
515 | } |
516 | } | |
517 | ||
518 | ||
519 | /** | |
520 | * macio_register_driver - Registers a new MacIO device driver | |
521 | * @drv: pointer to the driver definition structure | |
522 | */ | |
523 | int macio_register_driver(struct macio_driver *drv) | |
524 | { | |
1da177e4 | 525 | /* initialize common driver fields */ |
1da177e4 | 526 | drv->driver.bus = &macio_bus_type; |
1da177e4 LT |
527 | |
528 | /* register with core */ | |
d56a3e38 | 529 | return driver_register(&drv->driver); |
1da177e4 LT |
530 | } |
531 | ||
532 | /** | |
533 | * macio_unregister_driver - Unregisters a new MacIO device driver | |
534 | * @drv: pointer to the driver definition structure | |
535 | */ | |
536 | void macio_unregister_driver(struct macio_driver *drv) | |
537 | { | |
538 | driver_unregister(&drv->driver); | |
539 | } | |
540 | ||
7fb19ea0 BH |
541 | /* Managed MacIO resources */ |
542 | struct macio_devres { | |
543 | u32 res_mask; | |
544 | }; | |
545 | ||
546 | static void maciom_release(struct device *gendev, void *res) | |
547 | { | |
548 | struct macio_dev *dev = to_macio_device(gendev); | |
549 | struct macio_devres *dr = res; | |
550 | int i, max; | |
551 | ||
552 | max = min(dev->n_resources, 32); | |
553 | for (i = 0; i < max; i++) { | |
554 | if (dr->res_mask & (1 << i)) | |
555 | macio_release_resource(dev, i); | |
556 | } | |
557 | } | |
558 | ||
559 | int macio_enable_devres(struct macio_dev *dev) | |
560 | { | |
561 | struct macio_devres *dr; | |
562 | ||
563 | dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL); | |
564 | if (!dr) { | |
565 | dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL); | |
566 | if (!dr) | |
567 | return -ENOMEM; | |
568 | } | |
569 | return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL; | |
570 | } | |
571 | ||
572 | static struct macio_devres * find_macio_dr(struct macio_dev *dev) | |
573 | { | |
574 | return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL); | |
575 | } | |
576 | ||
1da177e4 LT |
577 | /** |
578 | * macio_request_resource - Request an MMIO resource | |
579 | * @dev: pointer to the device holding the resource | |
580 | * @resource_no: resource number to request | |
581 | * @name: resource name | |
582 | * | |
583 | * Mark memory region number @resource_no associated with MacIO | |
584 | * device @dev as being reserved by owner @name. Do not access | |
585 | * any address inside the memory regions unless this call returns | |
586 | * successfully. | |
587 | * | |
588 | * Returns 0 on success, or %EBUSY on error. A warning | |
589 | * message is also printed on failure. | |
590 | */ | |
2c5bd01f BH |
591 | int macio_request_resource(struct macio_dev *dev, int resource_no, |
592 | const char *name) | |
1da177e4 | 593 | { |
7fb19ea0 BH |
594 | struct macio_devres *dr = find_macio_dr(dev); |
595 | ||
1da177e4 LT |
596 | if (macio_resource_len(dev, resource_no) == 0) |
597 | return 0; | |
598 | ||
599 | if (!request_mem_region(macio_resource_start(dev, resource_no), | |
600 | macio_resource_len(dev, resource_no), | |
601 | name)) | |
602 | goto err_out; | |
7fb19ea0 BH |
603 | |
604 | if (dr && resource_no < 32) | |
605 | dr->res_mask |= 1 << resource_no; | |
1da177e4 LT |
606 | |
607 | return 0; | |
608 | ||
609 | err_out: | |
610 | printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx" | |
611 | " for device %s\n", | |
612 | resource_no, | |
613 | macio_resource_len(dev, resource_no), | |
614 | macio_resource_start(dev, resource_no), | |
1d7e6cca | 615 | dev_name(&dev->ofdev.dev)); |
1da177e4 LT |
616 | return -EBUSY; |
617 | } | |
618 | ||
619 | /** | |
620 | * macio_release_resource - Release an MMIO resource | |
621 | * @dev: pointer to the device holding the resource | |
622 | * @resource_no: resource number to release | |
623 | */ | |
624 | void macio_release_resource(struct macio_dev *dev, int resource_no) | |
625 | { | |
7fb19ea0 BH |
626 | struct macio_devres *dr = find_macio_dr(dev); |
627 | ||
1da177e4 LT |
628 | if (macio_resource_len(dev, resource_no) == 0) |
629 | return; | |
630 | release_mem_region(macio_resource_start(dev, resource_no), | |
631 | macio_resource_len(dev, resource_no)); | |
7fb19ea0 BH |
632 | if (dr && resource_no < 32) |
633 | dr->res_mask &= ~(1 << resource_no); | |
1da177e4 LT |
634 | } |
635 | ||
636 | /** | |
637 | * macio_request_resources - Reserve all memory resources | |
638 | * @dev: MacIO device whose resources are to be reserved | |
639 | * @name: Name to be associated with resource. | |
640 | * | |
641 | * Mark all memory regions associated with MacIO device @dev as | |
642 | * being reserved by owner @name. Do not access any address inside | |
643 | * the memory regions unless this call returns successfully. | |
644 | * | |
645 | * Returns 0 on success, or %EBUSY on error. A warning | |
646 | * message is also printed on failure. | |
647 | */ | |
648 | int macio_request_resources(struct macio_dev *dev, const char *name) | |
649 | { | |
650 | int i; | |
651 | ||
652 | for (i = 0; i < dev->n_resources; i++) | |
653 | if (macio_request_resource(dev, i, name)) | |
654 | goto err_out; | |
655 | return 0; | |
656 | ||
657 | err_out: | |
658 | while(--i >= 0) | |
659 | macio_release_resource(dev, i); | |
660 | ||
661 | return -EBUSY; | |
662 | } | |
663 | ||
664 | /** | |
665 | * macio_release_resources - Release reserved memory resources | |
666 | * @dev: MacIO device whose resources were previously reserved | |
667 | */ | |
668 | ||
669 | void macio_release_resources(struct macio_dev *dev) | |
670 | { | |
671 | int i; | |
672 | ||
673 | for (i = 0; i < dev->n_resources; i++) | |
674 | macio_release_resource(dev, i); | |
675 | } | |
676 | ||
677 | ||
678 | #ifdef CONFIG_PCI | |
679 | ||
1da42fb6 | 680 | static int macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
1da177e4 LT |
681 | { |
682 | struct device_node* np; | |
683 | struct macio_chip* chip; | |
684 | ||
685 | if (ent->vendor != PCI_VENDOR_ID_APPLE) | |
686 | return -ENODEV; | |
687 | ||
2c5bd01f BH |
688 | /* Note regarding refcounting: We assume pci_device_to_OF_node() is |
689 | * ported to new OF APIs and returns a node with refcount incremented. | |
1da177e4 LT |
690 | */ |
691 | np = pci_device_to_OF_node(pdev); | |
692 | if (np == NULL) | |
693 | return -ENODEV; | |
694 | ||
2c5bd01f BH |
695 | /* The above assumption is wrong !!! |
696 | * fix that here for now until I fix the arch code | |
697 | */ | |
1da177e4 LT |
698 | of_node_get(np); |
699 | ||
2c5bd01f BH |
700 | /* We also assume that pmac_feature will have done a get() on nodes |
701 | * stored in the macio chips array | |
1da177e4 LT |
702 | */ |
703 | chip = macio_find(np, macio_unknown); | |
704 | of_node_put(np); | |
705 | if (chip == NULL) | |
706 | return -ENODEV; | |
707 | ||
708 | /* XXX Need locking ??? */ | |
709 | if (chip->lbus.pdev == NULL) { | |
710 | chip->lbus.pdev = pdev; | |
711 | chip->lbus.chip = chip; | |
712 | pci_set_drvdata(pdev, &chip->lbus); | |
713 | pci_set_master(pdev); | |
714 | } | |
715 | ||
716 | printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n", | |
717 | chip->name); | |
718 | ||
719 | /* | |
720 | * HACK ALERT: The WallStreet PowerBook and some OHare based machines | |
2c5bd01f BH |
721 | * have 2 macio ASICs. I must probe the "main" one first or IDE |
722 | * ordering will be incorrect. So I put on "hold" the second one since | |
723 | * it seem to appear first on PCI | |
1da177e4 LT |
724 | */ |
725 | if (chip->type == macio_gatwick || chip->type == macio_ohareII) | |
726 | if (macio_chips[0].lbus.pdev == NULL) { | |
727 | macio_on_hold = chip; | |
728 | return 0; | |
729 | } | |
730 | ||
731 | macio_pci_add_devices(chip); | |
732 | if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) { | |
733 | macio_pci_add_devices(macio_on_hold); | |
734 | macio_on_hold = NULL; | |
735 | } | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
1da42fb6 | 740 | static void macio_pci_remove(struct pci_dev* pdev) |
1da177e4 LT |
741 | { |
742 | panic("removing of macio-asic not supported !\n"); | |
743 | } | |
744 | ||
745 | /* | |
746 | * MacIO is matched against any Apple ID, it's probe() function | |
747 | * will then decide wether it applies or not | |
748 | */ | |
1da42fb6 | 749 | static const struct pci_device_id pci_ids[] = { { |
1da177e4 LT |
750 | .vendor = PCI_VENDOR_ID_APPLE, |
751 | .device = PCI_ANY_ID, | |
752 | .subvendor = PCI_ANY_ID, | |
753 | .subdevice = PCI_ANY_ID, | |
754 | ||
755 | }, { /* end: all zeroes */ } | |
756 | }; | |
757 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
758 | ||
759 | /* pci driver glue; this is a "new style" PCI driver module */ | |
760 | static struct pci_driver macio_pci_driver = { | |
761 | .name = (char *) "macio", | |
762 | .id_table = pci_ids, | |
763 | ||
764 | .probe = macio_pci_probe, | |
765 | .remove = macio_pci_remove, | |
766 | }; | |
767 | ||
768 | #endif /* CONFIG_PCI */ | |
769 | ||
770 | static int __init macio_module_init (void) | |
771 | { | |
772 | #ifdef CONFIG_PCI | |
773 | int rc; | |
774 | ||
775 | rc = pci_register_driver(&macio_pci_driver); | |
776 | if (rc) | |
777 | return rc; | |
778 | #endif /* CONFIG_PCI */ | |
779 | return 0; | |
780 | } | |
781 | ||
782 | module_init(macio_module_init); | |
783 | ||
784 | EXPORT_SYMBOL(macio_register_driver); | |
785 | EXPORT_SYMBOL(macio_unregister_driver); | |
786 | EXPORT_SYMBOL(macio_dev_get); | |
787 | EXPORT_SYMBOL(macio_dev_put); | |
788 | EXPORT_SYMBOL(macio_request_resource); | |
789 | EXPORT_SYMBOL(macio_release_resource); | |
790 | EXPORT_SYMBOL(macio_request_resources); | |
791 | EXPORT_SYMBOL(macio_release_resources); | |
7fb19ea0 BH |
792 | EXPORT_SYMBOL(macio_enable_devres); |
793 |