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staging: brcm80211: Purge unused packet engine
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ssb / main.c
blob7892ac163522cd0e62f568fbc7cefcea173f298e
1 /*
2 * Sonics Silicon Backplane
3 * Subsystem core
4 *
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
7 *
8 * Licensed under the GNU/GPL. See COPYING for details.
9 */
10
11 #include "ssb_private.h"
12
13 #include <linux/delay.h>
14 #include <linux/io.h>
15 #include <linux/ssb/ssb.h>
16 #include <linux/ssb/ssb_regs.h>
17 #include <linux/ssb/ssb_driver_gige.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/pci.h>
20 #include <linux/mmc/sdio_func.h>
21 #include <linux/slab.h>
22
23 #include <pcmcia/cs.h>
24 #include <pcmcia/cistpl.h>
25 #include <pcmcia/ds.h>
26
27
28 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
29 MODULE_LICENSE("GPL");
30
31
32 /* Temporary list of yet-to-be-attached buses */
33 static LIST_HEAD(attach_queue);
34 /* List if running buses */
35 static LIST_HEAD(buses);
36 /* Software ID counter */
37 static unsigned int next_busnumber;
38 /* buses_mutes locks the two buslists and the next_busnumber.
39 * Don't lock this directly, but use ssb_buses_[un]lock() below. */
40 static DEFINE_MUTEX(buses_mutex);
41
42 /* There are differences in the codeflow, if the bus is
43 * initialized from early boot, as various needed services
44 * are not available early. This is a mechanism to delay
45 * these initializations to after early boot has finished.
46 * It's also used to avoid mutex locking, as that's not
47 * available and needed early. */
48 static bool ssb_is_early_boot = 1;
49
50 static void ssb_buses_lock(void);
51 static void ssb_buses_unlock(void);
52
53
54 #ifdef CONFIG_SSB_PCIHOST
55 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
56 {
57 struct ssb_bus *bus;
58
59 ssb_buses_lock();
60 list_for_each_entry(bus, &buses, list) {
61 if (bus->bustype == SSB_BUSTYPE_PCI &&
62 bus->host_pci == pdev)
63 goto found;
64 }
65 bus = NULL;
66 found:
67 ssb_buses_unlock();
68
69 return bus;
70 }
71 #endif /* CONFIG_SSB_PCIHOST */
72
73 #ifdef CONFIG_SSB_PCMCIAHOST
74 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
75 {
76 struct ssb_bus *bus;
77
78 ssb_buses_lock();
79 list_for_each_entry(bus, &buses, list) {
80 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
81 bus->host_pcmcia == pdev)
82 goto found;
83 }
84 bus = NULL;
85 found:
86 ssb_buses_unlock();
87
88 return bus;
89 }
90 #endif /* CONFIG_SSB_PCMCIAHOST */
91
92 #ifdef CONFIG_SSB_SDIOHOST
93 struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
94 {
95 struct ssb_bus *bus;
96
97 ssb_buses_lock();
98 list_for_each_entry(bus, &buses, list) {
99 if (bus->bustype == SSB_BUSTYPE_SDIO &&
100 bus->host_sdio == func)
101 goto found;
102 }
103 bus = NULL;
104 found:
105 ssb_buses_unlock();
106
107 return bus;
108 }
109 #endif /* CONFIG_SSB_SDIOHOST */
110
111 int ssb_for_each_bus_call(unsigned long data,
112 int (*func)(struct ssb_bus *bus, unsigned long data))
113 {
114 struct ssb_bus *bus;
115 int res;
116
117 ssb_buses_lock();
118 list_for_each_entry(bus, &buses, list) {
119 res = func(bus, data);
120 if (res >= 0) {
121 ssb_buses_unlock();
122 return res;
123 }
124 }
125 ssb_buses_unlock();
126
127 return -ENODEV;
128 }
129
130 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
131 {
132 if (dev)
133 get_device(dev->dev);
134 return dev;
135 }
136
137 static void ssb_device_put(struct ssb_device *dev)
138 {
139 if (dev)
140 put_device(dev->dev);
141 }
142
143 static inline struct ssb_driver *ssb_driver_get(struct ssb_driver *drv)
144 {
145 if (drv)
146 get_driver(&drv->drv);
147 return drv;
148 }
149
150 static inline void ssb_driver_put(struct ssb_driver *drv)
151 {
152 if (drv)
153 put_driver(&drv->drv);
154 }
155
156 static int ssb_device_resume(struct device *dev)
157 {
158 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
159 struct ssb_driver *ssb_drv;
160 int err = 0;
161
162 if (dev->driver) {
163 ssb_drv = drv_to_ssb_drv(dev->driver);
164 if (ssb_drv && ssb_drv->resume)
165 err = ssb_drv->resume(ssb_dev);
166 if (err)
167 goto out;
168 }
169 out:
170 return err;
171 }
172
173 static int ssb_device_suspend(struct device *dev, pm_message_t state)
174 {
175 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
176 struct ssb_driver *ssb_drv;
177 int err = 0;
178
179 if (dev->driver) {
180 ssb_drv = drv_to_ssb_drv(dev->driver);
181 if (ssb_drv && ssb_drv->suspend)
182 err = ssb_drv->suspend(ssb_dev, state);
183 if (err)
184 goto out;
185 }
186 out:
187 return err;
188 }
189
190 int ssb_bus_resume(struct ssb_bus *bus)
191 {
192 int err;
193
194 /* Reset HW state information in memory, so that HW is
195 * completely reinitialized. */
196 bus->mapped_device = NULL;
197 #ifdef CONFIG_SSB_DRIVER_PCICORE
198 bus->pcicore.setup_done = 0;
199 #endif
200
201 err = ssb_bus_powerup(bus, 0);
202 if (err)
203 return err;
204 err = ssb_pcmcia_hardware_setup(bus);
205 if (err) {
206 ssb_bus_may_powerdown(bus);
207 return err;
208 }
209 ssb_chipco_resume(&bus->chipco);
210 ssb_bus_may_powerdown(bus);
211
212 return 0;
213 }
214 EXPORT_SYMBOL(ssb_bus_resume);
215
216 int ssb_bus_suspend(struct ssb_bus *bus)
217 {
218 ssb_chipco_suspend(&bus->chipco);
219 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
220
221 return 0;
222 }
223 EXPORT_SYMBOL(ssb_bus_suspend);
224
225 #ifdef CONFIG_SSB_SPROM
226 /** ssb_devices_freeze - Freeze all devices on the bus.
227 *
228 * After freezing no device driver will be handling a device
229 * on this bus anymore. ssb_devices_thaw() must be called after
230 * a successful freeze to reactivate the devices.
231 *
232 * @bus: The bus.
233 * @ctx: Context structure. Pass this to ssb_devices_thaw().
234 */
235 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
236 {
237 struct ssb_device *sdev;
238 struct ssb_driver *sdrv;
239 unsigned int i;
240
241 memset(ctx, 0, sizeof(*ctx));
242 ctx->bus = bus;
243 SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
244
245 for (i = 0; i < bus->nr_devices; i++) {
246 sdev = ssb_device_get(&bus->devices[i]);
247
248 if (!sdev->dev || !sdev->dev->driver ||
249 !device_is_registered(sdev->dev)) {
250 ssb_device_put(sdev);
251 continue;
252 }
253 sdrv = ssb_driver_get(drv_to_ssb_drv(sdev->dev->driver));
254 if (!sdrv || SSB_WARN_ON(!sdrv->remove)) {
255 ssb_device_put(sdev);
256 continue;
257 }
258 sdrv->remove(sdev);
259 ctx->device_frozen[i] = 1;
260 }
261
262 return 0;
263 }
264
265 /** ssb_devices_thaw - Unfreeze all devices on the bus.
266 *
267 * This will re-attach the device drivers and re-init the devices.
268 *
269 * @ctx: The context structure from ssb_devices_freeze()
270 */
271 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
272 {
273 struct ssb_bus *bus = ctx->bus;
274 struct ssb_device *sdev;
275 struct ssb_driver *sdrv;
276 unsigned int i;
277 int err, result = 0;
278
279 for (i = 0; i < bus->nr_devices; i++) {
280 if (!ctx->device_frozen[i])
281 continue;
282 sdev = &bus->devices[i];
283
284 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
285 continue;
286 sdrv = drv_to_ssb_drv(sdev->dev->driver);
287 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
288 continue;
289
290 err = sdrv->probe(sdev, &sdev->id);
291 if (err) {
292 ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
293 dev_name(sdev->dev));
294 result = err;
295 }
296 ssb_driver_put(sdrv);
297 ssb_device_put(sdev);
298 }
299
300 return result;
301 }
302 #endif /* CONFIG_SSB_SPROM */
303
304 static void ssb_device_shutdown(struct device *dev)
305 {
306 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
307 struct ssb_driver *ssb_drv;
308
309 if (!dev->driver)
310 return;
311 ssb_drv = drv_to_ssb_drv(dev->driver);
312 if (ssb_drv && ssb_drv->shutdown)
313 ssb_drv->shutdown(ssb_dev);
314 }
315
316 static int ssb_device_remove(struct device *dev)
317 {
318 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
319 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
320
321 if (ssb_drv && ssb_drv->remove)
322 ssb_drv->remove(ssb_dev);
323 ssb_device_put(ssb_dev);
324
325 return 0;
326 }
327
328 static int ssb_device_probe(struct device *dev)
329 {
330 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
331 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
332 int err = 0;
333
334 ssb_device_get(ssb_dev);
335 if (ssb_drv && ssb_drv->probe)
336 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
337 if (err)
338 ssb_device_put(ssb_dev);
339
340 return err;
341 }
342
343 static int ssb_match_devid(const struct ssb_device_id *tabid,
344 const struct ssb_device_id *devid)
345 {
346 if ((tabid->vendor != devid->vendor) &&
347 tabid->vendor != SSB_ANY_VENDOR)
348 return 0;
349 if ((tabid->coreid != devid->coreid) &&
350 tabid->coreid != SSB_ANY_ID)
351 return 0;
352 if ((tabid->revision != devid->revision) &&
353 tabid->revision != SSB_ANY_REV)
354 return 0;
355 return 1;
356 }
357
358 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
359 {
360 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
361 struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
362 const struct ssb_device_id *id;
363
364 for (id = ssb_drv->id_table;
365 id->vendor || id->coreid || id->revision;
366 id++) {
367 if (ssb_match_devid(id, &ssb_dev->id))
368 return 1; /* found */
369 }
370
371 return 0;
372 }
373
374 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
375 {
376 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
377
378 if (!dev)
379 return -ENODEV;
380
381 return add_uevent_var(env,
382 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
383 ssb_dev->id.vendor, ssb_dev->id.coreid,
384 ssb_dev->id.revision);
385 }
386
387 static struct bus_type ssb_bustype = {
388 .name = "ssb",
389 .match = ssb_bus_match,
390 .probe = ssb_device_probe,
391 .remove = ssb_device_remove,
392 .shutdown = ssb_device_shutdown,
393 .suspend = ssb_device_suspend,
394 .resume = ssb_device_resume,
395 .uevent = ssb_device_uevent,
396 };
397
398 static void ssb_buses_lock(void)
399 {
400 /* See the comment at the ssb_is_early_boot definition */
401 if (!ssb_is_early_boot)
402 mutex_lock(&buses_mutex);
403 }
404
405 static void ssb_buses_unlock(void)
406 {
407 /* See the comment at the ssb_is_early_boot definition */
408 if (!ssb_is_early_boot)
409 mutex_unlock(&buses_mutex);
410 }
411
412 static void ssb_devices_unregister(struct ssb_bus *bus)
413 {
414 struct ssb_device *sdev;
415 int i;
416
417 for (i = bus->nr_devices - 1; i >= 0; i--) {
418 sdev = &(bus->devices[i]);
419 if (sdev->dev)
420 device_unregister(sdev->dev);
421 }
422 }
423
424 void ssb_bus_unregister(struct ssb_bus *bus)
425 {
426 ssb_buses_lock();
427 ssb_devices_unregister(bus);
428 list_del(&bus->list);
429 ssb_buses_unlock();
430
431 ssb_pcmcia_exit(bus);
432 ssb_pci_exit(bus);
433 ssb_iounmap(bus);
434 }
435 EXPORT_SYMBOL(ssb_bus_unregister);
436
437 static void ssb_release_dev(struct device *dev)
438 {
439 struct __ssb_dev_wrapper *devwrap;
440
441 devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
442 kfree(devwrap);
443 }
444
445 static int ssb_devices_register(struct ssb_bus *bus)
446 {
447 struct ssb_device *sdev;
448 struct device *dev;
449 struct __ssb_dev_wrapper *devwrap;
450 int i, err = 0;
451 int dev_idx = 0;
452
453 for (i = 0; i < bus->nr_devices; i++) {
454 sdev = &(bus->devices[i]);
455
456 /* We don't register SSB-system devices to the kernel,
457 * as the drivers for them are built into SSB. */
458 switch (sdev->id.coreid) {
459 case SSB_DEV_CHIPCOMMON:
460 case SSB_DEV_PCI:
461 case SSB_DEV_PCIE:
462 case SSB_DEV_PCMCIA:
463 case SSB_DEV_MIPS:
464 case SSB_DEV_MIPS_3302:
465 case SSB_DEV_EXTIF:
466 continue;
467 }
468
469 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
470 if (!devwrap) {
471 ssb_printk(KERN_ERR PFX
472 "Could not allocate device\n");
473 err = -ENOMEM;
474 goto error;
475 }
476 dev = &devwrap->dev;
477 devwrap->sdev = sdev;
478
479 dev->release = ssb_release_dev;
480 dev->bus = &ssb_bustype;
481 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
482
483 switch (bus->bustype) {
484 case SSB_BUSTYPE_PCI:
485 #ifdef CONFIG_SSB_PCIHOST
486 sdev->irq = bus->host_pci->irq;
487 dev->parent = &bus->host_pci->dev;
488 sdev->dma_dev = dev->parent;
489 #endif
490 break;
491 case SSB_BUSTYPE_PCMCIA:
492 #ifdef CONFIG_SSB_PCMCIAHOST
493 sdev->irq = bus->host_pcmcia->irq;
494 dev->parent = &bus->host_pcmcia->dev;
495 #endif
496 break;
497 case SSB_BUSTYPE_SDIO:
498 #ifdef CONFIG_SSB_SDIOHOST
499 dev->parent = &bus->host_sdio->dev;
500 #endif
501 break;
502 case SSB_BUSTYPE_SSB:
503 dev->dma_mask = &dev->coherent_dma_mask;
504 sdev->dma_dev = dev;
505 break;
506 }
507
508 sdev->dev = dev;
509 err = device_register(dev);
510 if (err) {
511 ssb_printk(KERN_ERR PFX
512 "Could not register %s\n",
513 dev_name(dev));
514 /* Set dev to NULL to not unregister
515 * dev on error unwinding. */
516 sdev->dev = NULL;
517 kfree(devwrap);
518 goto error;
519 }
520 dev_idx++;
521 }
522
523 return 0;
524 error:
525 /* Unwind the already registered devices. */
526 ssb_devices_unregister(bus);
527 return err;
528 }
529
530 /* Needs ssb_buses_lock() */
531 static int ssb_attach_queued_buses(void)
532 {
533 struct ssb_bus *bus, *n;
534 int err = 0;
535 int drop_them_all = 0;
536
537 list_for_each_entry_safe(bus, n, &attach_queue, list) {
538 if (drop_them_all) {
539 list_del(&bus->list);
540 continue;
541 }
542 /* Can't init the PCIcore in ssb_bus_register(), as that
543 * is too early in boot for embedded systems
544 * (no udelay() available). So do it here in attach stage.
545 */
546 err = ssb_bus_powerup(bus, 0);
547 if (err)
548 goto error;
549 ssb_pcicore_init(&bus->pcicore);
550 ssb_bus_may_powerdown(bus);
551
552 err = ssb_devices_register(bus);
553 error:
554 if (err) {
555 drop_them_all = 1;
556 list_del(&bus->list);
557 continue;
558 }
559 list_move_tail(&bus->list, &buses);
560 }
561
562 return err;
563 }
564
565 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
566 {
567 struct ssb_bus *bus = dev->bus;
568
569 offset += dev->core_index * SSB_CORE_SIZE;
570 return readb(bus->mmio + offset);
571 }
572
573 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
574 {
575 struct ssb_bus *bus = dev->bus;
576
577 offset += dev->core_index * SSB_CORE_SIZE;
578 return readw(bus->mmio + offset);
579 }
580
581 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
582 {
583 struct ssb_bus *bus = dev->bus;
584
585 offset += dev->core_index * SSB_CORE_SIZE;
586 return readl(bus->mmio + offset);
587 }
588
589 #ifdef CONFIG_SSB_BLOCKIO
590 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
591 size_t count, u16 offset, u8 reg_width)
592 {
593 struct ssb_bus *bus = dev->bus;
594 void __iomem *addr;
595
596 offset += dev->core_index * SSB_CORE_SIZE;
597 addr = bus->mmio + offset;
598
599 switch (reg_width) {
600 case sizeof(u8): {
601 u8 *buf = buffer;
602
603 while (count) {
604 *buf = __raw_readb(addr);
605 buf++;
606 count--;
607 }
608 break;
609 }
610 case sizeof(u16): {
611 __le16 *buf = buffer;
612
613 SSB_WARN_ON(count & 1);
614 while (count) {
615 *buf = (__force __le16)__raw_readw(addr);
616 buf++;
617 count -= 2;
618 }
619 break;
620 }
621 case sizeof(u32): {
622 __le32 *buf = buffer;
623
624 SSB_WARN_ON(count & 3);
625 while (count) {
626 *buf = (__force __le32)__raw_readl(addr);
627 buf++;
628 count -= 4;
629 }
630 break;
631 }
632 default:
633 SSB_WARN_ON(1);
634 }
635 }
636 #endif /* CONFIG_SSB_BLOCKIO */
637
638 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
639 {
640 struct ssb_bus *bus = dev->bus;
641
642 offset += dev->core_index * SSB_CORE_SIZE;
643 writeb(value, bus->mmio + offset);
644 }
645
646 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
647 {
648 struct ssb_bus *bus = dev->bus;
649
650 offset += dev->core_index * SSB_CORE_SIZE;
651 writew(value, bus->mmio + offset);
652 }
653
654 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
655 {
656 struct ssb_bus *bus = dev->bus;
657
658 offset += dev->core_index * SSB_CORE_SIZE;
659 writel(value, bus->mmio + offset);
660 }
661
662 #ifdef CONFIG_SSB_BLOCKIO
663 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
664 size_t count, u16 offset, u8 reg_width)
665 {
666 struct ssb_bus *bus = dev->bus;
667 void __iomem *addr;
668
669 offset += dev->core_index * SSB_CORE_SIZE;
670 addr = bus->mmio + offset;
671
672 switch (reg_width) {
673 case sizeof(u8): {
674 const u8 *buf = buffer;
675
676 while (count) {
677 __raw_writeb(*buf, addr);
678 buf++;
679 count--;
680 }
681 break;
682 }
683 case sizeof(u16): {
684 const __le16 *buf = buffer;
685
686 SSB_WARN_ON(count & 1);
687 while (count) {
688 __raw_writew((__force u16)(*buf), addr);
689 buf++;
690 count -= 2;
691 }
692 break;
693 }
694 case sizeof(u32): {
695 const __le32 *buf = buffer;
696
697 SSB_WARN_ON(count & 3);
698 while (count) {
699 __raw_writel((__force u32)(*buf), addr);
700 buf++;
701 count -= 4;
702 }
703 break;
704 }
705 default:
706 SSB_WARN_ON(1);
707 }
708 }
709 #endif /* CONFIG_SSB_BLOCKIO */
710
711 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
712 static const struct ssb_bus_ops ssb_ssb_ops = {
713 .read8 = ssb_ssb_read8,
714 .read16 = ssb_ssb_read16,
715 .read32 = ssb_ssb_read32,
716 .write8 = ssb_ssb_write8,
717 .write16 = ssb_ssb_write16,
718 .write32 = ssb_ssb_write32,
719 #ifdef CONFIG_SSB_BLOCKIO
720 .block_read = ssb_ssb_block_read,
721 .block_write = ssb_ssb_block_write,
722 #endif
723 };
724
725 static int ssb_fetch_invariants(struct ssb_bus *bus,
726 ssb_invariants_func_t get_invariants)
727 {
728 struct ssb_init_invariants iv;
729 int err;
730
731 memset(&iv, 0, sizeof(iv));
732 err = get_invariants(bus, &iv);
733 if (err)
734 goto out;
735 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
736 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
737 bus->has_cardbus_slot = iv.has_cardbus_slot;
738 out:
739 return err;
740 }
741
742 static int ssb_bus_register(struct ssb_bus *bus,
743 ssb_invariants_func_t get_invariants,
744 unsigned long baseaddr)
745 {
746 int err;
747
748 spin_lock_init(&bus->bar_lock);
749 INIT_LIST_HEAD(&bus->list);
750 #ifdef CONFIG_SSB_EMBEDDED
751 spin_lock_init(&bus->gpio_lock);
752 #endif
753
754 /* Powerup the bus */
755 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
756 if (err)
757 goto out;
758
759 /* Init SDIO-host device (if any), before the scan */
760 err = ssb_sdio_init(bus);
761 if (err)
762 goto err_disable_xtal;
763
764 ssb_buses_lock();
765 bus->busnumber = next_busnumber;
766 /* Scan for devices (cores) */
767 err = ssb_bus_scan(bus, baseaddr);
768 if (err)
769 goto err_sdio_exit;
770
771 /* Init PCI-host device (if any) */
772 err = ssb_pci_init(bus);
773 if (err)
774 goto err_unmap;
775 /* Init PCMCIA-host device (if any) */
776 err = ssb_pcmcia_init(bus);
777 if (err)
778 goto err_pci_exit;
779
780 /* Initialize basic system devices (if available) */
781 err = ssb_bus_powerup(bus, 0);
782 if (err)
783 goto err_pcmcia_exit;
784 ssb_chipcommon_init(&bus->chipco);
785 ssb_mipscore_init(&bus->mipscore);
786 err = ssb_fetch_invariants(bus, get_invariants);
787 if (err) {
788 ssb_bus_may_powerdown(bus);
789 goto err_pcmcia_exit;
790 }
791 ssb_bus_may_powerdown(bus);
792
793 /* Queue it for attach.
794 * See the comment at the ssb_is_early_boot definition. */
795 list_add_tail(&bus->list, &attach_queue);
796 if (!ssb_is_early_boot) {
797 /* This is not early boot, so we must attach the bus now */
798 err = ssb_attach_queued_buses();
799 if (err)
800 goto err_dequeue;
801 }
802 next_busnumber++;
803 ssb_buses_unlock();
804
805 out:
806 return err;
807
808 err_dequeue:
809 list_del(&bus->list);
810 err_pcmcia_exit:
811 ssb_pcmcia_exit(bus);
812 err_pci_exit:
813 ssb_pci_exit(bus);
814 err_unmap:
815 ssb_iounmap(bus);
816 err_sdio_exit:
817 ssb_sdio_exit(bus);
818 err_disable_xtal:
819 ssb_buses_unlock();
820 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
821 return err;
822 }
823
824 #ifdef CONFIG_SSB_PCIHOST
825 int ssb_bus_pcibus_register(struct ssb_bus *bus,
826 struct pci_dev *host_pci)
827 {
828 int err;
829
830 bus->bustype = SSB_BUSTYPE_PCI;
831 bus->host_pci = host_pci;
832 bus->ops = &ssb_pci_ops;
833
834 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
835 if (!err) {
836 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
837 "PCI device %s\n", dev_name(&host_pci->dev));
838 } else {
839 ssb_printk(KERN_ERR PFX "Failed to register PCI version"
840 " of SSB with error %d\n", err);
841 }
842
843 return err;
844 }
845 EXPORT_SYMBOL(ssb_bus_pcibus_register);
846 #endif /* CONFIG_SSB_PCIHOST */
847
848 #ifdef CONFIG_SSB_PCMCIAHOST
849 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
850 struct pcmcia_device *pcmcia_dev,
851 unsigned long baseaddr)
852 {
853 int err;
854
855 bus->bustype = SSB_BUSTYPE_PCMCIA;
856 bus->host_pcmcia = pcmcia_dev;
857 bus->ops = &ssb_pcmcia_ops;
858
859 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
860 if (!err) {
861 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
862 "PCMCIA device %s\n", pcmcia_dev->devname);
863 }
864
865 return err;
866 }
867 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
868 #endif /* CONFIG_SSB_PCMCIAHOST */
869
870 #ifdef CONFIG_SSB_SDIOHOST
871 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
872 unsigned int quirks)
873 {
874 int err;
875
876 bus->bustype = SSB_BUSTYPE_SDIO;
877 bus->host_sdio = func;
878 bus->ops = &ssb_sdio_ops;
879 bus->quirks = quirks;
880
881 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
882 if (!err) {
883 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
884 "SDIO device %s\n", sdio_func_id(func));
885 }
886
887 return err;
888 }
889 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
890 #endif /* CONFIG_SSB_PCMCIAHOST */
891
892 int ssb_bus_ssbbus_register(struct ssb_bus *bus,
893 unsigned long baseaddr,
894 ssb_invariants_func_t get_invariants)
895 {
896 int err;
897
898 bus->bustype = SSB_BUSTYPE_SSB;
899 bus->ops = &ssb_ssb_ops;
900
901 err = ssb_bus_register(bus, get_invariants, baseaddr);
902 if (!err) {
903 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
904 "address 0x%08lX\n", baseaddr);
905 }
906
907 return err;
908 }
909
910 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
911 {
912 drv->drv.name = drv->name;
913 drv->drv.bus = &ssb_bustype;
914 drv->drv.owner = owner;
915
916 return driver_register(&drv->drv);
917 }
918 EXPORT_SYMBOL(__ssb_driver_register);
919
920 void ssb_driver_unregister(struct ssb_driver *drv)
921 {
922 driver_unregister(&drv->drv);
923 }
924 EXPORT_SYMBOL(ssb_driver_unregister);
925
926 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
927 {
928 struct ssb_bus *bus = dev->bus;
929 struct ssb_device *ent;
930 int i;
931
932 for (i = 0; i < bus->nr_devices; i++) {
933 ent = &(bus->devices[i]);
934 if (ent->id.vendor != dev->id.vendor)
935 continue;
936 if (ent->id.coreid != dev->id.coreid)
937 continue;
938
939 ent->devtypedata = data;
940 }
941 }
942 EXPORT_SYMBOL(ssb_set_devtypedata);
943
944 static u32 clkfactor_f6_resolve(u32 v)
945 {
946 /* map the magic values */
947 switch (v) {
948 case SSB_CHIPCO_CLK_F6_2:
949 return 2;
950 case SSB_CHIPCO_CLK_F6_3:
951 return 3;
952 case SSB_CHIPCO_CLK_F6_4:
953 return 4;
954 case SSB_CHIPCO_CLK_F6_5:
955 return 5;
956 case SSB_CHIPCO_CLK_F6_6:
957 return 6;
958 case SSB_CHIPCO_CLK_F6_7:
959 return 7;
960 }
961 return 0;
962 }
963
964 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
965 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
966 {
967 u32 n1, n2, clock, m1, m2, m3, mc;
968
969 n1 = (n & SSB_CHIPCO_CLK_N1);
970 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
971
972 switch (plltype) {
973 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
974 if (m & SSB_CHIPCO_CLK_T6_MMASK)
975 return SSB_CHIPCO_CLK_T6_M0;
976 return SSB_CHIPCO_CLK_T6_M1;
977 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
978 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
979 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
980 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
981 n1 = clkfactor_f6_resolve(n1);
982 n2 += SSB_CHIPCO_CLK_F5_BIAS;
983 break;
984 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
985 n1 += SSB_CHIPCO_CLK_T2_BIAS;
986 n2 += SSB_CHIPCO_CLK_T2_BIAS;
987 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
988 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
989 break;
990 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
991 return 100000000;
992 default:
993 SSB_WARN_ON(1);
994 }
995
996 switch (plltype) {
997 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
998 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
999 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1000 break;
1001 default:
1002 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1003 }
1004 if (!clock)
1005 return 0;
1006
1007 m1 = (m & SSB_CHIPCO_CLK_M1);
1008 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1009 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1010 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1011
1012 switch (plltype) {
1013 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1014 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1015 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1016 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1017 m1 = clkfactor_f6_resolve(m1);
1018 if ((plltype == SSB_PLLTYPE_1) ||
1019 (plltype == SSB_PLLTYPE_3))
1020 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1021 else
1022 m2 = clkfactor_f6_resolve(m2);
1023 m3 = clkfactor_f6_resolve(m3);
1024
1025 switch (mc) {
1026 case SSB_CHIPCO_CLK_MC_BYPASS:
1027 return clock;
1028 case SSB_CHIPCO_CLK_MC_M1:
1029 return (clock / m1);
1030 case SSB_CHIPCO_CLK_MC_M1M2:
1031 return (clock / (m1 * m2));
1032 case SSB_CHIPCO_CLK_MC_M1M2M3:
1033 return (clock / (m1 * m2 * m3));
1034 case SSB_CHIPCO_CLK_MC_M1M3:
1035 return (clock / (m1 * m3));
1036 }
1037 return 0;
1038 case SSB_PLLTYPE_2:
1039 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1040 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1041 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1042 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1043 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1044 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1045
1046 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1047 clock /= m1;
1048 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1049 clock /= m2;
1050 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1051 clock /= m3;
1052 return clock;
1053 default:
1054 SSB_WARN_ON(1);
1055 }
1056 return 0;
1057 }
1058
1059 /* Get the current speed the backplane is running at */
1060 u32 ssb_clockspeed(struct ssb_bus *bus)
1061 {
1062 u32 rate;
1063 u32 plltype;
1064 u32 clkctl_n, clkctl_m;
1065
1066 if (ssb_extif_available(&bus->extif))
1067 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1068 &clkctl_n, &clkctl_m);
1069 else if (bus->chipco.dev)
1070 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1071 &clkctl_n, &clkctl_m);
1072 else
1073 return 0;
1074
1075 if (bus->chip_id == 0x5365) {
1076 rate = 100000000;
1077 } else {
1078 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1079 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1080 rate /= 2;
1081 }
1082
1083 return rate;
1084 }
1085 EXPORT_SYMBOL(ssb_clockspeed);
1086
1087 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1088 {
1089 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1090
1091 /* The REJECT bit changed position in TMSLOW between
1092 * Backplane revisions. */
1093 switch (rev) {
1094 case SSB_IDLOW_SSBREV_22:
1095 return SSB_TMSLOW_REJECT_22;
1096 case SSB_IDLOW_SSBREV_23:
1097 return SSB_TMSLOW_REJECT_23;
1098 case SSB_IDLOW_SSBREV_24: /* TODO - find the proper REJECT bits */
1099 case SSB_IDLOW_SSBREV_25: /* same here */
1100 case SSB_IDLOW_SSBREV_26: /* same here */
1101 case SSB_IDLOW_SSBREV_27: /* same here */
1102 return SSB_TMSLOW_REJECT_23; /* this is a guess */
1103 default:
1104 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1105 WARN_ON(1);
1106 }
1107 return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
1108 }
1109
1110 int ssb_device_is_enabled(struct ssb_device *dev)
1111 {
1112 u32 val;
1113 u32 reject;
1114
1115 reject = ssb_tmslow_reject_bitmask(dev);
1116 val = ssb_read32(dev, SSB_TMSLOW);
1117 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1118
1119 return (val == SSB_TMSLOW_CLOCK);
1120 }
1121 EXPORT_SYMBOL(ssb_device_is_enabled);
1122
1123 static void ssb_flush_tmslow(struct ssb_device *dev)
1124 {
1125 /* Make _really_ sure the device has finished the TMSLOW
1126 * register write transaction, as we risk running into
1127 * a machine check exception otherwise.
1128 * Do this by reading the register back to commit the
1129 * PCI write and delay an additional usec for the device
1130 * to react to the change. */
1131 ssb_read32(dev, SSB_TMSLOW);
1132 udelay(1);
1133 }
1134
1135 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1136 {
1137 u32 val;
1138
1139 ssb_device_disable(dev, core_specific_flags);
1140 ssb_write32(dev, SSB_TMSLOW,
1141 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1142 SSB_TMSLOW_FGC | core_specific_flags);
1143 ssb_flush_tmslow(dev);
1144
1145 /* Clear SERR if set. This is a hw bug workaround. */
1146 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1147 ssb_write32(dev, SSB_TMSHIGH, 0);
1148
1149 val = ssb_read32(dev, SSB_IMSTATE);
1150 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1151 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1152 ssb_write32(dev, SSB_IMSTATE, val);
1153 }
1154
1155 ssb_write32(dev, SSB_TMSLOW,
1156 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1157 core_specific_flags);
1158 ssb_flush_tmslow(dev);
1159
1160 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1161 core_specific_flags);
1162 ssb_flush_tmslow(dev);
1163 }
1164 EXPORT_SYMBOL(ssb_device_enable);
1165
1166 /* Wait for a bit in a register to get set or unset.
1167 * timeout is in units of ten-microseconds */
1168 static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask,
1169 int timeout, int set)
1170 {
1171 int i;
1172 u32 val;
1173
1174 for (i = 0; i < timeout; i++) {
1175 val = ssb_read32(dev, reg);
1176 if (set) {
1177 if (val & bitmask)
1178 return 0;
1179 } else {
1180 if (!(val & bitmask))
1181 return 0;
1182 }
1183 udelay(10);
1184 }
1185 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1186 "register %04X to %s.\n",
1187 bitmask, reg, (set ? "set" : "clear"));
1188
1189 return -ETIMEDOUT;
1190 }
1191
1192 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1193 {
1194 u32 reject;
1195
1196 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1197 return;
1198
1199 reject = ssb_tmslow_reject_bitmask(dev);
1200 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1201 ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1);
1202 ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1203 ssb_write32(dev, SSB_TMSLOW,
1204 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1205 reject | SSB_TMSLOW_RESET |
1206 core_specific_flags);
1207 ssb_flush_tmslow(dev);
1208
1209 ssb_write32(dev, SSB_TMSLOW,
1210 reject | SSB_TMSLOW_RESET |
1211 core_specific_flags);
1212 ssb_flush_tmslow(dev);
1213 }
1214 EXPORT_SYMBOL(ssb_device_disable);
1215
1216 u32 ssb_dma_translation(struct ssb_device *dev)
1217 {
1218 switch (dev->bus->bustype) {
1219 case SSB_BUSTYPE_SSB:
1220 return 0;
1221 case SSB_BUSTYPE_PCI:
1222 return SSB_PCI_DMA;
1223 default:
1224 __ssb_dma_not_implemented(dev);
1225 }
1226 return 0;
1227 }
1228 EXPORT_SYMBOL(ssb_dma_translation);
1229
1230 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1231 {
1232 struct ssb_chipcommon *cc;
1233 int err = 0;
1234
1235 /* On buses where more than one core may be working
1236 * at a time, we must not powerdown stuff if there are
1237 * still cores that may want to run. */
1238 if (bus->bustype == SSB_BUSTYPE_SSB)
1239 goto out;
1240
1241 cc = &bus->chipco;
1242
1243 if (!cc->dev)
1244 goto out;
1245 if (cc->dev->id.revision < 5)
1246 goto out;
1247
1248 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1249 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1250 if (err)
1251 goto error;
1252 out:
1253 #ifdef CONFIG_SSB_DEBUG
1254 bus->powered_up = 0;
1255 #endif
1256 return err;
1257 error:
1258 ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1259 goto out;
1260 }
1261 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1262
1263 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1264 {
1265 struct ssb_chipcommon *cc;
1266 int err;
1267 enum ssb_clkmode mode;
1268
1269 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1270 if (err)
1271 goto error;
1272 cc = &bus->chipco;
1273 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1274 ssb_chipco_set_clockmode(cc, mode);
1275
1276 #ifdef CONFIG_SSB_DEBUG
1277 bus->powered_up = 1;
1278 #endif
1279 return 0;
1280 error:
1281 ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1282 return err;
1283 }
1284 EXPORT_SYMBOL(ssb_bus_powerup);
1285
1286 u32 ssb_admatch_base(u32 adm)
1287 {
1288 u32 base = 0;
1289
1290 switch (adm & SSB_ADM_TYPE) {
1291 case SSB_ADM_TYPE0:
1292 base = (adm & SSB_ADM_BASE0);
1293 break;
1294 case SSB_ADM_TYPE1:
1295 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1296 base = (adm & SSB_ADM_BASE1);
1297 break;
1298 case SSB_ADM_TYPE2:
1299 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1300 base = (adm & SSB_ADM_BASE2);
1301 break;
1302 default:
1303 SSB_WARN_ON(1);
1304 }
1305
1306 return base;
1307 }
1308 EXPORT_SYMBOL(ssb_admatch_base);
1309
1310 u32 ssb_admatch_size(u32 adm)
1311 {
1312 u32 size = 0;
1313
1314 switch (adm & SSB_ADM_TYPE) {
1315 case SSB_ADM_TYPE0:
1316 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1317 break;
1318 case SSB_ADM_TYPE1:
1319 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1320 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1321 break;
1322 case SSB_ADM_TYPE2:
1323 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1324 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1325 break;
1326 default:
1327 SSB_WARN_ON(1);
1328 }
1329 size = (1 << (size + 1));
1330
1331 return size;
1332 }
1333 EXPORT_SYMBOL(ssb_admatch_size);
1334
1335 static int __init ssb_modinit(void)
1336 {
1337 int err;
1338
1339 /* See the comment at the ssb_is_early_boot definition */
1340 ssb_is_early_boot = 0;
1341 err = bus_register(&ssb_bustype);
1342 if (err)
1343 return err;
1344
1345 /* Maybe we already registered some buses at early boot.
1346 * Check for this and attach them
1347 */
1348 ssb_buses_lock();
1349 err = ssb_attach_queued_buses();
1350 ssb_buses_unlock();
1351 if (err) {
1352 bus_unregister(&ssb_bustype);
1353 goto out;
1354 }
1355
1356 err = b43_pci_ssb_bridge_init();
1357 if (err) {
1358 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1359 "initialization failed\n");
1360 /* don't fail SSB init because of this */
1361 err = 0;
1362 }
1363 err = ssb_gige_init();
1364 if (err) {
1365 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1366 "driver initialization failed\n");
1367 /* don't fail SSB init because of this */
1368 err = 0;
1369 }
1370 out:
1371 return err;
1372 }
1373 /* ssb must be initialized after PCI but before the ssb drivers.
1374 * That means we must use some initcall between subsys_initcall
1375 * and device_initcall. */
1376 fs_initcall(ssb_modinit);
1377
1378 static void __exit ssb_modexit(void)
1379 {
1380 ssb_gige_exit();
1381 b43_pci_ssb_bridge_exit();
1382 bus_unregister(&ssb_bustype);
1383 }
1384 module_exit(ssb_modexit)
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree