blob: 26a303a1d1abd4bc885de4be79d46798f98a0afc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +11006 * 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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#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>
Tim Schmielau4e57b682005-10-30 15:03:48 -080026#include <linux/slab.h>
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#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
Kay Sievers1d7e6cc2009-01-06 10:44:39 -080036#define MAX_NODE_NAME_SIZE (20 - 12)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38static struct macio_chip *macio_on_hold;
39
40static int macio_bus_match(struct device *dev, struct device_driver *drv)
41{
42 struct macio_dev * macio_dev = to_macio_device(dev);
43 struct macio_driver * macio_drv = to_macio_driver(drv);
Jeff Mahoney5e655772005-07-06 15:44:41 -040044 const struct of_device_id * matches = macio_drv->match_table;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46 if (!matches)
47 return 0;
48
49 return of_match_device(matches, &macio_dev->ofdev) != NULL;
50}
51
52struct macio_dev *macio_dev_get(struct macio_dev *dev)
53{
54 struct device *tmp;
55
56 if (!dev)
57 return NULL;
58 tmp = get_device(&dev->ofdev.dev);
59 if (tmp)
60 return to_macio_device(tmp);
61 else
62 return NULL;
63}
64
65void macio_dev_put(struct macio_dev *dev)
66{
67 if (dev)
68 put_device(&dev->ofdev.dev);
69}
70
71
72static int macio_device_probe(struct device *dev)
73{
74 int error = -ENODEV;
75 struct macio_driver *drv;
76 struct macio_dev *macio_dev;
Jeff Mahoney5e655772005-07-06 15:44:41 -040077 const struct of_device_id *match;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79 drv = to_macio_driver(dev->driver);
80 macio_dev = to_macio_device(dev);
81
82 if (!drv->probe)
83 return error;
84
85 macio_dev_get(macio_dev);
86
87 match = of_match_device(drv->match_table, &macio_dev->ofdev);
88 if (match)
89 error = drv->probe(macio_dev, match);
90 if (error)
91 macio_dev_put(macio_dev);
92
93 return error;
94}
95
96static int macio_device_remove(struct device *dev)
97{
98 struct macio_dev * macio_dev = to_macio_device(dev);
99 struct macio_driver * drv = to_macio_driver(dev->driver);
100
101 if (dev->driver && drv->remove)
102 drv->remove(macio_dev);
103 macio_dev_put(macio_dev);
104
105 return 0;
106}
107
108static void macio_device_shutdown(struct device *dev)
109{
110 struct macio_dev * macio_dev = to_macio_device(dev);
111 struct macio_driver * drv = to_macio_driver(dev->driver);
112
113 if (dev->driver && drv->shutdown)
114 drv->shutdown(macio_dev);
115}
116
Pavel Machekf4513902005-04-16 15:25:32 -0700117static int macio_device_suspend(struct device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118{
119 struct macio_dev * macio_dev = to_macio_device(dev);
120 struct macio_driver * drv = to_macio_driver(dev->driver);
121
122 if (dev->driver && drv->suspend)
123 return drv->suspend(macio_dev, state);
124 return 0;
125}
126
127static int macio_device_resume(struct device * dev)
128{
129 struct macio_dev * macio_dev = to_macio_device(dev);
130 struct macio_driver * drv = to_macio_driver(dev->driver);
131
132 if (dev->driver && drv->resume)
133 return drv->resume(macio_dev);
134 return 0;
135}
136
Jeff Mahoneyb5bf5b62005-07-06 15:26:27 -0400137extern struct device_attribute macio_dev_attrs[];
138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139struct bus_type macio_bus_type = {
140 .name = "macio",
141 .match = macio_bus_match,
Sylvain Munautcc116452007-02-12 23:13:26 +0100142 .uevent = of_device_uevent,
Russell King4866b122006-01-05 14:39:24 +0000143 .probe = macio_device_probe,
144 .remove = macio_device_remove,
145 .shutdown = macio_device_shutdown,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 .suspend = macio_device_suspend,
147 .resume = macio_device_resume,
Jeff Mahoneyb5bf5b62005-07-06 15:26:27 -0400148 .dev_attrs = macio_dev_attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149};
150
151static int __init macio_bus_driver_init(void)
152{
153 return bus_register(&macio_bus_type);
154}
155
156postcore_initcall(macio_bus_driver_init);
157
158
159/**
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100160 * macio_release_dev - free a macio device structure when all users of it are
161 * finished.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 * @dev: device that's been disconnected
163 *
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100164 * Will be called only by the device core when all users of this macio device
165 * are done. This currently means never as we don't hot remove any macio
166 * device yet, though that will happen with mediabay based devices in a later
167 * implementation.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 */
169static void macio_release_dev(struct device *dev)
170{
171 struct macio_dev *mdev;
172
173 mdev = to_macio_device(dev);
174 kfree(mdev);
175}
176
177/**
178 * macio_resource_quirks - tweak or skip some resources for a device
179 * @np: pointer to the device node
180 * @res: resulting resource
181 * @index: index of resource in node
182 *
183 * If this routine returns non-null, then the resource is completely
184 * skipped.
185 */
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100186static int macio_resource_quirks(struct device_node *np, struct resource *res,
187 int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188{
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000189 /* Only quirks for memory resources for now */
190 if ((res->flags & IORESOURCE_MEM) == 0)
191 return 0;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100192
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000193 /* Grand Central has too large resource 0 on some machines */
194 if (index == 0 && !strcmp(np->name, "gc"))
195 res->end = res->start + 0x1ffff;
196
197 /* Airport has bogus resource 2 */
198 if (index >= 2 && !strcmp(np->name, "radio"))
199 return 1;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100200
201#ifndef CONFIG_PPC64
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000202 /* DBDMAs may have bogus sizes */
203 if ((res->start & 0x0001f000) == 0x00008000)
204 res->end = res->start + 0xff;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100205#endif /* CONFIG_PPC64 */
206
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000207 /* ESCC parent eats child resources. We could have added a
208 * level of hierarchy, but I don't really feel the need
209 * for it
210 */
211 if (!strcmp(np->name, "escc"))
212 return 1;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100213
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000214 /* ESCC has bogus resources >= 3 */
215 if (index >= 3 && !(strcmp(np->name, "ch-a") &&
216 strcmp(np->name, "ch-b")))
217 return 1;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100218
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000219 /* Media bay has too many resources, keep only first one */
220 if (index > 0 && !strcmp(np->name, "media-bay"))
221 return 1;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100222
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000223 /* Some older IDE resources have bogus sizes */
224 if (!(strcmp(np->name, "IDE") && strcmp(np->name, "ATA") &&
225 strcmp(np->type, "ide") && strcmp(np->type, "ata"))) {
226 if (index == 0 && (res->end - res->start) > 0xfff)
227 res->end = res->start + 0xfff;
228 if (index == 1 && (res->end - res->start) > 0xff)
229 res->end = res->start + 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 }
231 return 0;
232}
233
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000234static void macio_create_fixup_irq(struct macio_dev *dev, int index,
235 unsigned int line)
236{
237 unsigned int irq;
238
Benjamin Herrenschmidt6e99e452006-07-10 04:44:42 -0700239 irq = irq_create_mapping(NULL, line);
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000240 if (irq != NO_IRQ) {
241 dev->interrupt[index].start = irq;
242 dev->interrupt[index].flags = IORESOURCE_IRQ;
Kay Sievers1d7e6cc2009-01-06 10:44:39 -0800243 dev->interrupt[index].name = dev_name(&dev->ofdev.dev);
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000244 }
245 if (dev->n_interrupts <= index)
246 dev->n_interrupts = index + 1;
247}
248
249static void macio_add_missing_resources(struct macio_dev *dev)
250{
251 struct device_node *np = dev->ofdev.node;
252 unsigned int irq_base;
253
254 /* Gatwick has some missing interrupts on child nodes */
255 if (dev->bus->chip->type != macio_gatwick)
256 return;
257
258 /* irq_base is always 64 on gatwick. I have no cleaner way to get
259 * that value from here at this point
260 */
261 irq_base = 64;
262
263 /* Fix SCC */
264 if (strcmp(np->name, "ch-a") == 0) {
265 macio_create_fixup_irq(dev, 0, 15 + irq_base);
266 macio_create_fixup_irq(dev, 1, 4 + irq_base);
267 macio_create_fixup_irq(dev, 2, 5 + irq_base);
268 printk(KERN_INFO "macio: fixed SCC irqs on gatwick\n");
269 }
270
271 /* Fix media-bay */
272 if (strcmp(np->name, "media-bay") == 0) {
273 macio_create_fixup_irq(dev, 0, 29 + irq_base);
274 printk(KERN_INFO "macio: fixed media-bay irq on gatwick\n");
275 }
276
277 /* Fix left media bay childs */
278 if (dev->media_bay != NULL && strcmp(np->name, "floppy") == 0) {
279 macio_create_fixup_irq(dev, 0, 19 + irq_base);
280 macio_create_fixup_irq(dev, 1, 1 + irq_base);
281 printk(KERN_INFO "macio: fixed left floppy irqs\n");
282 }
283 if (dev->media_bay != NULL && strcasecmp(np->name, "ata4") == 0) {
284 macio_create_fixup_irq(dev, 0, 14 + irq_base);
285 macio_create_fixup_irq(dev, 0, 3 + irq_base);
286 printk(KERN_INFO "macio: fixed left ide irqs\n");
287 }
288}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100290static void macio_setup_interrupts(struct macio_dev *dev)
291{
292 struct device_node *np = dev->ofdev.node;
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000293 unsigned int irq;
294 int i = 0, j = 0;
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100295
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000296 for (;;) {
roel kluinfb2881a2009-08-03 02:41:42 +0000297 struct resource *res;
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100298
299 if (j >= MACIO_DEV_COUNT_IRQS)
300 break;
roel kluinfb2881a2009-08-03 02:41:42 +0000301 res = &dev->interrupt[j];
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000302 irq = irq_of_parse_and_map(np, i++);
303 if (irq == NO_IRQ)
304 break;
305 res->start = irq;
306 res->flags = IORESOURCE_IRQ;
Kay Sievers1d7e6cc2009-01-06 10:44:39 -0800307 res->name = dev_name(&dev->ofdev.dev);
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000308 if (macio_resource_quirks(np, res, i - 1)) {
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100309 memset(res, 0, sizeof(struct resource));
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000310 continue;
311 } else
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100312 j++;
313 }
314 dev->n_interrupts = j;
315}
316
317static void macio_setup_resources(struct macio_dev *dev,
318 struct resource *parent_res)
319{
320 struct device_node *np = dev->ofdev.node;
Benjamin Herrenschmidtd2dd4822005-11-30 16:57:28 +1100321 struct resource r;
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100322 int index;
323
Benjamin Herrenschmidtd2dd4822005-11-30 16:57:28 +1100324 for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
roel kluinfb2881a2009-08-03 02:41:42 +0000325 struct resource *res;
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100326 if (index >= MACIO_DEV_COUNT_RESOURCES)
327 break;
roel kluinfb2881a2009-08-03 02:41:42 +0000328 res = &dev->resource[index];
Benjamin Herrenschmidtd2dd4822005-11-30 16:57:28 +1100329 *res = r;
Kay Sievers1d7e6cc2009-01-06 10:44:39 -0800330 res->name = dev_name(&dev->ofdev.dev);
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100331
332 if (macio_resource_quirks(np, res, index)) {
333 memset(res, 0, sizeof(struct resource));
334 continue;
335 }
336 /* Currently, we consider failure as harmless, this may
337 * change in the future, once I've found all the device
338 * tree bugs in older machines & worked around them
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100339 */
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100340 if (insert_resource(parent_res, res)) {
341 printk(KERN_WARNING "Can't request resource "
342 "%d for MacIO device %s\n",
Kay Sievers1d7e6cc2009-01-06 10:44:39 -0800343 index, dev_name(&dev->ofdev.dev));
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100344 }
345 }
346 dev->n_resources = index;
347}
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349/**
350 * macio_add_one_device - Add one device from OF node to the device tree
351 * @chip: pointer to the macio_chip holding the device
352 * @np: pointer to the device node in the OF tree
353 * @in_bay: set to 1 if device is part of a media-bay
354 *
355 * When media-bay is changed to hotswap drivers, this function will
356 * be exposed to the bay driver some way...
357 */
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100358static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
359 struct device *parent,
360 struct device_node *np,
361 struct macio_dev *in_bay,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 struct resource *parent_res)
363{
364 struct macio_dev *dev;
Jeremy Kerr018a3d12006-07-12 15:40:29 +1000365 const u32 *reg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367 if (np == NULL)
368 return NULL;
369
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700370 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 if (!dev)
372 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374 dev->bus = &chip->lbus;
375 dev->media_bay = in_bay;
376 dev->ofdev.node = np;
377 dev->ofdev.dma_mask = 0xffffffffUL;
378 dev->ofdev.dev.dma_mask = &dev->ofdev.dma_mask;
379 dev->ofdev.dev.parent = parent;
380 dev->ofdev.dev.bus = &macio_bus_type;
381 dev->ofdev.dev.release = macio_release_dev;
Benjamin Herrenschmidt128b4a02009-12-01 14:36:27 +0000382 dev->ofdev.dev.dma_parms = &dev->dma_parms;
383
384 /* Standard DMA paremeters */
385 dma_set_max_seg_size(&dev->ofdev.dev, 65536);
386 dma_set_seg_boundary(&dev->ofdev.dev, 0xffffffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Benjamin Herrenschmidt35141412009-06-18 19:20:51 +0000388#ifdef CONFIG_PCI
389 /* Set the DMA ops to the ones from the PCI device, this could be
390 * fishy if we didn't know that on PowerMac it's always direct ops
391 * or iommu ops that will work fine
392 */
393 dev->ofdev.dev.archdata.dma_ops =
394 chip->lbus.pdev->dev.archdata.dma_ops;
395 dev->ofdev.dev.archdata.dma_data =
396 chip->lbus.pdev->dev.archdata.dma_data;
397#endif /* CONFIG_PCI */
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399#ifdef DEBUG
400 printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
401 dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
402#endif
403
404 /* MacIO itself has a different reg, we use it's PCI base */
405 if (np == chip->of_node) {
Kay Sievers1d7e6cc2009-01-06 10:44:39 -0800406 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
407 chip->lbus.index,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408#ifdef CONFIG_PCI
Benjamin Herrenschmidtd63fb6c2006-07-02 11:55:03 +1000409 (unsigned int)pci_resource_start(chip->lbus.pdev, 0),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410#else
411 0, /* NuBus may want to do something better here */
412#endif
413 MAX_NODE_NAME_SIZE, np->name);
414 } else {
Stephen Rothwell01b27262007-04-27 13:41:15 +1000415 reg = of_get_property(np, "reg", NULL);
Kay Sievers1d7e6cc2009-01-06 10:44:39 -0800416 dev_set_name(&dev->ofdev.dev, "%1d.%08x:%.*s",
417 chip->lbus.index,
418 reg ? *reg : 0, MAX_NODE_NAME_SIZE, np->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 }
420
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100421 /* Setup interrupts & resources */
422 macio_setup_interrupts(dev);
423 macio_setup_resources(dev, parent_res);
Benjamin Herrenschmidt0ebfff12006-07-03 21:36:01 +1000424 macio_add_missing_resources(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100426 /* Register with core */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 if (of_device_register(&dev->ofdev) != 0) {
428 printk(KERN_DEBUG"macio: device registration error for %s!\n",
Kay Sievers1d7e6cc2009-01-06 10:44:39 -0800429 dev_name(&dev->ofdev.dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 kfree(dev);
431 return NULL;
432 }
433
434 return dev;
435}
436
437static int macio_skip_device(struct device_node *np)
438{
439 if (strncmp(np->name, "battery", 7) == 0)
440 return 1;
441 if (strncmp(np->name, "escc-legacy", 11) == 0)
442 return 1;
443 return 0;
444}
445
446/**
447 * macio_pci_add_devices - Adds sub-devices of mac-io to the device tree
448 * @chip: pointer to the macio_chip holding the devices
449 *
450 * This function will do the job of extracting devices from the
451 * Open Firmware device tree, build macio_dev structures and add
452 * them to the Linux device tree.
453 *
454 * For now, childs of media-bay are added now as well. This will
455 * change rsn though.
456 */
457static void macio_pci_add_devices(struct macio_chip *chip)
458{
459 struct device_node *np, *pnode;
460 struct macio_dev *rdev, *mdev, *mbdev = NULL, *sdev = NULL;
461 struct device *parent = NULL;
462 struct resource *root_res = &iomem_resource;
463
464 /* Add a node for the macio bus itself */
465#ifdef CONFIG_PCI
466 if (chip->lbus.pdev) {
467 parent = &chip->lbus.pdev->dev;
468 root_res = &chip->lbus.pdev->resource[0];
469 }
470#endif
471 pnode = of_node_get(chip->of_node);
472 if (pnode == NULL)
473 return;
474
475 /* Add macio itself to hierarchy */
476 rdev = macio_add_one_device(chip, parent, pnode, NULL, root_res);
477 if (rdev == NULL)
478 return;
479 root_res = &rdev->resource[0];
480
481 /* First scan 1st level */
482 for (np = NULL; (np = of_get_next_child(pnode, np)) != NULL;) {
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100483 if (macio_skip_device(np))
484 continue;
485 of_node_get(np);
486 mdev = macio_add_one_device(chip, &rdev->ofdev.dev, np, NULL,
487 root_res);
488 if (mdev == NULL)
489 of_node_put(np);
490 else if (strncmp(np->name, "media-bay", 9) == 0)
491 mbdev = mdev;
492 else if (strncmp(np->name, "escc", 4) == 0)
493 sdev = mdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 }
495
496 /* Add media bay devices if any */
497 if (mbdev)
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100498 for (np = NULL; (np = of_get_next_child(mbdev->ofdev.node, np))
499 != NULL;) {
500 if (macio_skip_device(np))
501 continue;
502 of_node_get(np);
503 if (macio_add_one_device(chip, &mbdev->ofdev.dev, np,
504 mbdev, root_res) == NULL)
505 of_node_put(np);
506 }
507
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 /* Add serial ports if any */
509 if (sdev) {
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100510 for (np = NULL; (np = of_get_next_child(sdev->ofdev.node, np))
511 != NULL;) {
512 if (macio_skip_device(np))
513 continue;
514 of_node_get(np);
515 if (macio_add_one_device(chip, &sdev->ofdev.dev, np,
516 NULL, root_res) == NULL)
517 of_node_put(np);
518 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 }
520}
521
522
523/**
524 * macio_register_driver - Registers a new MacIO device driver
525 * @drv: pointer to the driver definition structure
526 */
527int macio_register_driver(struct macio_driver *drv)
528{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 /* initialize common driver fields */
530 drv->driver.name = drv->name;
531 drv->driver.bus = &macio_bus_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
533 /* register with core */
Bjorn Helgaasd56a3e32006-03-21 23:20:28 -0800534 return driver_register(&drv->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535}
536
537/**
538 * macio_unregister_driver - Unregisters a new MacIO device driver
539 * @drv: pointer to the driver definition structure
540 */
541void macio_unregister_driver(struct macio_driver *drv)
542{
543 driver_unregister(&drv->driver);
544}
545
Benjamin Herrenschmidt7fb19ea2009-12-01 14:36:26 +0000546/* Managed MacIO resources */
547struct macio_devres {
548 u32 res_mask;
549};
550
551static void maciom_release(struct device *gendev, void *res)
552{
553 struct macio_dev *dev = to_macio_device(gendev);
554 struct macio_devres *dr = res;
555 int i, max;
556
557 max = min(dev->n_resources, 32);
558 for (i = 0; i < max; i++) {
559 if (dr->res_mask & (1 << i))
560 macio_release_resource(dev, i);
561 }
562}
563
564int macio_enable_devres(struct macio_dev *dev)
565{
566 struct macio_devres *dr;
567
568 dr = devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
569 if (!dr) {
570 dr = devres_alloc(maciom_release, sizeof(*dr), GFP_KERNEL);
571 if (!dr)
572 return -ENOMEM;
573 }
574 return devres_get(&dev->ofdev.dev, dr, NULL, NULL) != NULL;
575}
576
577static struct macio_devres * find_macio_dr(struct macio_dev *dev)
578{
579 return devres_find(&dev->ofdev.dev, maciom_release, NULL, NULL);
580}
581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582/**
583 * macio_request_resource - Request an MMIO resource
584 * @dev: pointer to the device holding the resource
585 * @resource_no: resource number to request
586 * @name: resource name
587 *
588 * Mark memory region number @resource_no associated with MacIO
589 * device @dev as being reserved by owner @name. Do not access
590 * any address inside the memory regions unless this call returns
591 * successfully.
592 *
593 * Returns 0 on success, or %EBUSY on error. A warning
594 * message is also printed on failure.
595 */
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100596int macio_request_resource(struct macio_dev *dev, int resource_no,
597 const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598{
Benjamin Herrenschmidt7fb19ea2009-12-01 14:36:26 +0000599 struct macio_devres *dr = find_macio_dr(dev);
600
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 if (macio_resource_len(dev, resource_no) == 0)
602 return 0;
603
604 if (!request_mem_region(macio_resource_start(dev, resource_no),
605 macio_resource_len(dev, resource_no),
606 name))
607 goto err_out;
Benjamin Herrenschmidt7fb19ea2009-12-01 14:36:26 +0000608
609 if (dr && resource_no < 32)
610 dr->res_mask |= 1 << resource_no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611
612 return 0;
613
614err_out:
615 printk (KERN_WARNING "MacIO: Unable to reserve resource #%d:%lx@%lx"
616 " for device %s\n",
617 resource_no,
618 macio_resource_len(dev, resource_no),
619 macio_resource_start(dev, resource_no),
Kay Sievers1d7e6cc2009-01-06 10:44:39 -0800620 dev_name(&dev->ofdev.dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 return -EBUSY;
622}
623
624/**
625 * macio_release_resource - Release an MMIO resource
626 * @dev: pointer to the device holding the resource
627 * @resource_no: resource number to release
628 */
629void macio_release_resource(struct macio_dev *dev, int resource_no)
630{
Benjamin Herrenschmidt7fb19ea2009-12-01 14:36:26 +0000631 struct macio_devres *dr = find_macio_dr(dev);
632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 if (macio_resource_len(dev, resource_no) == 0)
634 return;
635 release_mem_region(macio_resource_start(dev, resource_no),
636 macio_resource_len(dev, resource_no));
Benjamin Herrenschmidt7fb19ea2009-12-01 14:36:26 +0000637 if (dr && resource_no < 32)
638 dr->res_mask &= ~(1 << resource_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639}
640
641/**
642 * macio_request_resources - Reserve all memory resources
643 * @dev: MacIO device whose resources are to be reserved
644 * @name: Name to be associated with resource.
645 *
646 * Mark all memory regions associated with MacIO device @dev as
647 * being reserved by owner @name. Do not access any address inside
648 * the memory regions unless this call returns successfully.
649 *
650 * Returns 0 on success, or %EBUSY on error. A warning
651 * message is also printed on failure.
652 */
653int macio_request_resources(struct macio_dev *dev, const char *name)
654{
655 int i;
656
657 for (i = 0; i < dev->n_resources; i++)
658 if (macio_request_resource(dev, i, name))
659 goto err_out;
660 return 0;
661
662err_out:
663 while(--i >= 0)
664 macio_release_resource(dev, i);
665
666 return -EBUSY;
667}
668
669/**
670 * macio_release_resources - Release reserved memory resources
671 * @dev: MacIO device whose resources were previously reserved
672 */
673
674void macio_release_resources(struct macio_dev *dev)
675{
676 int i;
677
678 for (i = 0; i < dev->n_resources; i++)
679 macio_release_resource(dev, i);
680}
681
682
683#ifdef CONFIG_PCI
684
685static int __devinit macio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
686{
687 struct device_node* np;
688 struct macio_chip* chip;
689
690 if (ent->vendor != PCI_VENDOR_ID_APPLE)
691 return -ENODEV;
692
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100693 /* Note regarding refcounting: We assume pci_device_to_OF_node() is
694 * ported to new OF APIs and returns a node with refcount incremented.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 */
696 np = pci_device_to_OF_node(pdev);
697 if (np == NULL)
698 return -ENODEV;
699
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100700 /* The above assumption is wrong !!!
701 * fix that here for now until I fix the arch code
702 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 of_node_get(np);
704
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100705 /* We also assume that pmac_feature will have done a get() on nodes
706 * stored in the macio chips array
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 */
708 chip = macio_find(np, macio_unknown);
709 of_node_put(np);
710 if (chip == NULL)
711 return -ENODEV;
712
713 /* XXX Need locking ??? */
714 if (chip->lbus.pdev == NULL) {
715 chip->lbus.pdev = pdev;
716 chip->lbus.chip = chip;
717 pci_set_drvdata(pdev, &chip->lbus);
718 pci_set_master(pdev);
719 }
720
721 printk(KERN_INFO "MacIO PCI driver attached to %s chipset\n",
722 chip->name);
723
724 /*
725 * HACK ALERT: The WallStreet PowerBook and some OHare based machines
Benjamin Herrenschmidt2c5bd012005-11-23 17:59:04 +1100726 * have 2 macio ASICs. I must probe the "main" one first or IDE
727 * ordering will be incorrect. So I put on "hold" the second one since
728 * it seem to appear first on PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 */
730 if (chip->type == macio_gatwick || chip->type == macio_ohareII)
731 if (macio_chips[0].lbus.pdev == NULL) {
732 macio_on_hold = chip;
733 return 0;
734 }
735
736 macio_pci_add_devices(chip);
737 if (macio_on_hold && macio_chips[0].lbus.pdev != NULL) {
738 macio_pci_add_devices(macio_on_hold);
739 macio_on_hold = NULL;
740 }
741
742 return 0;
743}
744
745static void __devexit macio_pci_remove(struct pci_dev* pdev)
746{
747 panic("removing of macio-asic not supported !\n");
748}
749
750/*
751 * MacIO is matched against any Apple ID, it's probe() function
752 * will then decide wether it applies or not
753 */
754static const struct pci_device_id __devinitdata pci_ids [] = { {
755 .vendor = PCI_VENDOR_ID_APPLE,
756 .device = PCI_ANY_ID,
757 .subvendor = PCI_ANY_ID,
758 .subdevice = PCI_ANY_ID,
759
760 }, { /* end: all zeroes */ }
761};
762MODULE_DEVICE_TABLE (pci, pci_ids);
763
764/* pci driver glue; this is a "new style" PCI driver module */
765static struct pci_driver macio_pci_driver = {
766 .name = (char *) "macio",
767 .id_table = pci_ids,
768
769 .probe = macio_pci_probe,
770 .remove = macio_pci_remove,
771};
772
773#endif /* CONFIG_PCI */
774
775static int __init macio_module_init (void)
776{
777#ifdef CONFIG_PCI
778 int rc;
779
780 rc = pci_register_driver(&macio_pci_driver);
781 if (rc)
782 return rc;
783#endif /* CONFIG_PCI */
784 return 0;
785}
786
787module_init(macio_module_init);
788
789EXPORT_SYMBOL(macio_register_driver);
790EXPORT_SYMBOL(macio_unregister_driver);
791EXPORT_SYMBOL(macio_dev_get);
792EXPORT_SYMBOL(macio_dev_put);
793EXPORT_SYMBOL(macio_request_resource);
794EXPORT_SYMBOL(macio_release_resource);
795EXPORT_SYMBOL(macio_request_resources);
796EXPORT_SYMBOL(macio_release_resources);
Benjamin Herrenschmidt7fb19ea2009-12-01 14:36:26 +0000797EXPORT_SYMBOL(macio_enable_devres);
798