[SSB] Initialise dma_mask for SSB_BUSTYPE_SSB devices
[linux-2.6] / drivers / ssb / main.c
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
21 #include <pcmcia/cs_types.h>
22 #include <pcmcia/cs.h>
23 #include <pcmcia/cistpl.h>
24 #include <pcmcia/ds.h>
25
26
27 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
28 MODULE_LICENSE("GPL");
29
30
31 /* Temporary list of yet-to-be-attached buses */
32 static LIST_HEAD(attach_queue);
33 /* List if running buses */
34 static LIST_HEAD(buses);
35 /* Software ID counter */
36 static unsigned int next_busnumber;
37 /* buses_mutes locks the two buslists and the next_busnumber.
38  * Don't lock this directly, but use ssb_buses_[un]lock() below. */
39 static DEFINE_MUTEX(buses_mutex);
40
41 /* There are differences in the codeflow, if the bus is
42  * initialized from early boot, as various needed services
43  * are not available early. This is a mechanism to delay
44  * these initializations to after early boot has finished.
45  * It's also used to avoid mutex locking, as that's not
46  * available and needed early. */
47 static bool ssb_is_early_boot = 1;
48
49 static void ssb_buses_lock(void);
50 static void ssb_buses_unlock(void);
51
52
53 #ifdef CONFIG_SSB_PCIHOST
54 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
55 {
56         struct ssb_bus *bus;
57
58         ssb_buses_lock();
59         list_for_each_entry(bus, &buses, list) {
60                 if (bus->bustype == SSB_BUSTYPE_PCI &&
61                     bus->host_pci == pdev)
62                         goto found;
63         }
64         bus = NULL;
65 found:
66         ssb_buses_unlock();
67
68         return bus;
69 }
70 #endif /* CONFIG_SSB_PCIHOST */
71
72 #ifdef CONFIG_SSB_PCMCIAHOST
73 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
74 {
75         struct ssb_bus *bus;
76
77         ssb_buses_lock();
78         list_for_each_entry(bus, &buses, list) {
79                 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
80                     bus->host_pcmcia == pdev)
81                         goto found;
82         }
83         bus = NULL;
84 found:
85         ssb_buses_unlock();
86
87         return bus;
88 }
89 #endif /* CONFIG_SSB_PCMCIAHOST */
90
91 int ssb_for_each_bus_call(unsigned long data,
92                           int (*func)(struct ssb_bus *bus, unsigned long data))
93 {
94         struct ssb_bus *bus;
95         int res;
96
97         ssb_buses_lock();
98         list_for_each_entry(bus, &buses, list) {
99                 res = func(bus, data);
100                 if (res >= 0) {
101                         ssb_buses_unlock();
102                         return res;
103                 }
104         }
105         ssb_buses_unlock();
106
107         return -ENODEV;
108 }
109
110 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
111 {
112         if (dev)
113                 get_device(dev->dev);
114         return dev;
115 }
116
117 static void ssb_device_put(struct ssb_device *dev)
118 {
119         if (dev)
120                 put_device(dev->dev);
121 }
122
123 static int ssb_device_resume(struct device *dev)
124 {
125         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
126         struct ssb_driver *ssb_drv;
127         int err = 0;
128
129         if (dev->driver) {
130                 ssb_drv = drv_to_ssb_drv(dev->driver);
131                 if (ssb_drv && ssb_drv->resume)
132                         err = ssb_drv->resume(ssb_dev);
133                 if (err)
134                         goto out;
135         }
136 out:
137         return err;
138 }
139
140 static int ssb_device_suspend(struct device *dev, pm_message_t state)
141 {
142         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
143         struct ssb_driver *ssb_drv;
144         int err = 0;
145
146         if (dev->driver) {
147                 ssb_drv = drv_to_ssb_drv(dev->driver);
148                 if (ssb_drv && ssb_drv->suspend)
149                         err = ssb_drv->suspend(ssb_dev, state);
150                 if (err)
151                         goto out;
152         }
153 out:
154         return err;
155 }
156
157 int ssb_bus_resume(struct ssb_bus *bus)
158 {
159         int err;
160
161         /* Reset HW state information in memory, so that HW is
162          * completely reinitialized. */
163         bus->mapped_device = NULL;
164 #ifdef CONFIG_SSB_DRIVER_PCICORE
165         bus->pcicore.setup_done = 0;
166 #endif
167
168         err = ssb_bus_powerup(bus, 0);
169         if (err)
170                 return err;
171         err = ssb_pcmcia_hardware_setup(bus);
172         if (err) {
173                 ssb_bus_may_powerdown(bus);
174                 return err;
175         }
176         ssb_chipco_resume(&bus->chipco);
177         ssb_bus_may_powerdown(bus);
178
179         return 0;
180 }
181 EXPORT_SYMBOL(ssb_bus_resume);
182
183 int ssb_bus_suspend(struct ssb_bus *bus)
184 {
185         ssb_chipco_suspend(&bus->chipco);
186         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
187
188         return 0;
189 }
190 EXPORT_SYMBOL(ssb_bus_suspend);
191
192 #ifdef CONFIG_SSB_SPROM
193 int ssb_devices_freeze(struct ssb_bus *bus)
194 {
195         struct ssb_device *dev;
196         struct ssb_driver *drv;
197         int err = 0;
198         int i;
199         pm_message_t state = PMSG_FREEZE;
200
201         /* First check that we are capable to freeze all devices. */
202         for (i = 0; i < bus->nr_devices; i++) {
203                 dev = &(bus->devices[i]);
204                 if (!dev->dev ||
205                     !dev->dev->driver ||
206                     !device_is_registered(dev->dev))
207                         continue;
208                 drv = drv_to_ssb_drv(dev->dev->driver);
209                 if (!drv)
210                         continue;
211                 if (!drv->suspend) {
212                         /* Nope, can't suspend this one. */
213                         return -EOPNOTSUPP;
214                 }
215         }
216         /* Now suspend all devices */
217         for (i = 0; i < bus->nr_devices; i++) {
218                 dev = &(bus->devices[i]);
219                 if (!dev->dev ||
220                     !dev->dev->driver ||
221                     !device_is_registered(dev->dev))
222                         continue;
223                 drv = drv_to_ssb_drv(dev->dev->driver);
224                 if (!drv)
225                         continue;
226                 err = drv->suspend(dev, state);
227                 if (err) {
228                         ssb_printk(KERN_ERR PFX "Failed to freeze device %s\n",
229                                    dev->dev->bus_id);
230                         goto err_unwind;
231                 }
232         }
233
234         return 0;
235 err_unwind:
236         for (i--; i >= 0; i--) {
237                 dev = &(bus->devices[i]);
238                 if (!dev->dev ||
239                     !dev->dev->driver ||
240                     !device_is_registered(dev->dev))
241                         continue;
242                 drv = drv_to_ssb_drv(dev->dev->driver);
243                 if (!drv)
244                         continue;
245                 if (drv->resume)
246                         drv->resume(dev);
247         }
248         return err;
249 }
250
251 int ssb_devices_thaw(struct ssb_bus *bus)
252 {
253         struct ssb_device *dev;
254         struct ssb_driver *drv;
255         int err;
256         int i;
257
258         for (i = 0; i < bus->nr_devices; i++) {
259                 dev = &(bus->devices[i]);
260                 if (!dev->dev ||
261                     !dev->dev->driver ||
262                     !device_is_registered(dev->dev))
263                         continue;
264                 drv = drv_to_ssb_drv(dev->dev->driver);
265                 if (!drv)
266                         continue;
267                 if (SSB_WARN_ON(!drv->resume))
268                         continue;
269                 err = drv->resume(dev);
270                 if (err) {
271                         ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
272                                    dev->dev->bus_id);
273                 }
274         }
275
276         return 0;
277 }
278 #endif /* CONFIG_SSB_SPROM */
279
280 static void ssb_device_shutdown(struct device *dev)
281 {
282         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
283         struct ssb_driver *ssb_drv;
284
285         if (!dev->driver)
286                 return;
287         ssb_drv = drv_to_ssb_drv(dev->driver);
288         if (ssb_drv && ssb_drv->shutdown)
289                 ssb_drv->shutdown(ssb_dev);
290 }
291
292 static int ssb_device_remove(struct device *dev)
293 {
294         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
295         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
296
297         if (ssb_drv && ssb_drv->remove)
298                 ssb_drv->remove(ssb_dev);
299         ssb_device_put(ssb_dev);
300
301         return 0;
302 }
303
304 static int ssb_device_probe(struct device *dev)
305 {
306         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
307         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
308         int err = 0;
309
310         ssb_device_get(ssb_dev);
311         if (ssb_drv && ssb_drv->probe)
312                 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
313         if (err)
314                 ssb_device_put(ssb_dev);
315
316         return err;
317 }
318
319 static int ssb_match_devid(const struct ssb_device_id *tabid,
320                            const struct ssb_device_id *devid)
321 {
322         if ((tabid->vendor != devid->vendor) &&
323             tabid->vendor != SSB_ANY_VENDOR)
324                 return 0;
325         if ((tabid->coreid != devid->coreid) &&
326             tabid->coreid != SSB_ANY_ID)
327                 return 0;
328         if ((tabid->revision != devid->revision) &&
329             tabid->revision != SSB_ANY_REV)
330                 return 0;
331         return 1;
332 }
333
334 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
335 {
336         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
337         struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
338         const struct ssb_device_id *id;
339
340         for (id = ssb_drv->id_table;
341              id->vendor || id->coreid || id->revision;
342              id++) {
343                 if (ssb_match_devid(id, &ssb_dev->id))
344                         return 1; /* found */
345         }
346
347         return 0;
348 }
349
350 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
351 {
352         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
353
354         if (!dev)
355                 return -ENODEV;
356
357         return add_uevent_var(env,
358                              "MODALIAS=ssb:v%04Xid%04Xrev%02X",
359                              ssb_dev->id.vendor, ssb_dev->id.coreid,
360                              ssb_dev->id.revision);
361 }
362
363 static struct bus_type ssb_bustype = {
364         .name           = "ssb",
365         .match          = ssb_bus_match,
366         .probe          = ssb_device_probe,
367         .remove         = ssb_device_remove,
368         .shutdown       = ssb_device_shutdown,
369         .suspend        = ssb_device_suspend,
370         .resume         = ssb_device_resume,
371         .uevent         = ssb_device_uevent,
372 };
373
374 static void ssb_buses_lock(void)
375 {
376         /* See the comment at the ssb_is_early_boot definition */
377         if (!ssb_is_early_boot)
378                 mutex_lock(&buses_mutex);
379 }
380
381 static void ssb_buses_unlock(void)
382 {
383         /* See the comment at the ssb_is_early_boot definition */
384         if (!ssb_is_early_boot)
385                 mutex_unlock(&buses_mutex);
386 }
387
388 static void ssb_devices_unregister(struct ssb_bus *bus)
389 {
390         struct ssb_device *sdev;
391         int i;
392
393         for (i = bus->nr_devices - 1; i >= 0; i--) {
394                 sdev = &(bus->devices[i]);
395                 if (sdev->dev)
396                         device_unregister(sdev->dev);
397         }
398 }
399
400 void ssb_bus_unregister(struct ssb_bus *bus)
401 {
402         ssb_buses_lock();
403         ssb_devices_unregister(bus);
404         list_del(&bus->list);
405         ssb_buses_unlock();
406
407         ssb_pcmcia_exit(bus);
408         ssb_pci_exit(bus);
409         ssb_iounmap(bus);
410 }
411 EXPORT_SYMBOL(ssb_bus_unregister);
412
413 static void ssb_release_dev(struct device *dev)
414 {
415         struct __ssb_dev_wrapper *devwrap;
416
417         devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
418         kfree(devwrap);
419 }
420
421 static int ssb_devices_register(struct ssb_bus *bus)
422 {
423         struct ssb_device *sdev;
424         struct device *dev;
425         struct __ssb_dev_wrapper *devwrap;
426         int i, err = 0;
427         int dev_idx = 0;
428
429         for (i = 0; i < bus->nr_devices; i++) {
430                 sdev = &(bus->devices[i]);
431
432                 /* We don't register SSB-system devices to the kernel,
433                  * as the drivers for them are built into SSB. */
434                 switch (sdev->id.coreid) {
435                 case SSB_DEV_CHIPCOMMON:
436                 case SSB_DEV_PCI:
437                 case SSB_DEV_PCIE:
438                 case SSB_DEV_PCMCIA:
439                 case SSB_DEV_MIPS:
440                 case SSB_DEV_MIPS_3302:
441                 case SSB_DEV_EXTIF:
442                         continue;
443                 }
444
445                 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
446                 if (!devwrap) {
447                         ssb_printk(KERN_ERR PFX
448                                    "Could not allocate device\n");
449                         err = -ENOMEM;
450                         goto error;
451                 }
452                 dev = &devwrap->dev;
453                 devwrap->sdev = sdev;
454
455                 dev->release = ssb_release_dev;
456                 dev->bus = &ssb_bustype;
457                 snprintf(dev->bus_id, sizeof(dev->bus_id),
458                          "ssb%u:%d", bus->busnumber, dev_idx);
459
460                 switch (bus->bustype) {
461                 case SSB_BUSTYPE_PCI:
462 #ifdef CONFIG_SSB_PCIHOST
463                         sdev->irq = bus->host_pci->irq;
464                         dev->parent = &bus->host_pci->dev;
465 #endif
466                         break;
467                 case SSB_BUSTYPE_PCMCIA:
468 #ifdef CONFIG_SSB_PCMCIAHOST
469                         sdev->irq = bus->host_pcmcia->irq.AssignedIRQ;
470                         dev->parent = &bus->host_pcmcia->dev;
471 #endif
472                         break;
473                 case SSB_BUSTYPE_SSB:
474                         dev->dma_mask = &dev->coherent_dma_mask;
475                         break;
476                 }
477
478                 sdev->dev = dev;
479                 err = device_register(dev);
480                 if (err) {
481                         ssb_printk(KERN_ERR PFX
482                                    "Could not register %s\n",
483                                    dev->bus_id);
484                         /* Set dev to NULL to not unregister
485                          * dev on error unwinding. */
486                         sdev->dev = NULL;
487                         kfree(devwrap);
488                         goto error;
489                 }
490                 dev_idx++;
491         }
492
493         return 0;
494 error:
495         /* Unwind the already registered devices. */
496         ssb_devices_unregister(bus);
497         return err;
498 }
499
500 /* Needs ssb_buses_lock() */
501 static int ssb_attach_queued_buses(void)
502 {
503         struct ssb_bus *bus, *n;
504         int err = 0;
505         int drop_them_all = 0;
506
507         list_for_each_entry_safe(bus, n, &attach_queue, list) {
508                 if (drop_them_all) {
509                         list_del(&bus->list);
510                         continue;
511                 }
512                 /* Can't init the PCIcore in ssb_bus_register(), as that
513                  * is too early in boot for embedded systems
514                  * (no udelay() available). So do it here in attach stage.
515                  */
516                 err = ssb_bus_powerup(bus, 0);
517                 if (err)
518                         goto error;
519                 ssb_pcicore_init(&bus->pcicore);
520                 ssb_bus_may_powerdown(bus);
521
522                 err = ssb_devices_register(bus);
523 error:
524                 if (err) {
525                         drop_them_all = 1;
526                         list_del(&bus->list);
527                         continue;
528                 }
529                 list_move_tail(&bus->list, &buses);
530         }
531
532         return err;
533 }
534
535 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
536 {
537         struct ssb_bus *bus = dev->bus;
538
539         offset += dev->core_index * SSB_CORE_SIZE;
540         return readb(bus->mmio + offset);
541 }
542
543 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
544 {
545         struct ssb_bus *bus = dev->bus;
546
547         offset += dev->core_index * SSB_CORE_SIZE;
548         return readw(bus->mmio + offset);
549 }
550
551 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
552 {
553         struct ssb_bus *bus = dev->bus;
554
555         offset += dev->core_index * SSB_CORE_SIZE;
556         return readl(bus->mmio + offset);
557 }
558
559 #ifdef CONFIG_SSB_BLOCKIO
560 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
561                                size_t count, u16 offset, u8 reg_width)
562 {
563         struct ssb_bus *bus = dev->bus;
564         void __iomem *addr;
565
566         offset += dev->core_index * SSB_CORE_SIZE;
567         addr = bus->mmio + offset;
568
569         switch (reg_width) {
570         case sizeof(u8): {
571                 u8 *buf = buffer;
572
573                 while (count) {
574                         *buf = __raw_readb(addr);
575                         buf++;
576                         count--;
577                 }
578                 break;
579         }
580         case sizeof(u16): {
581                 __le16 *buf = buffer;
582
583                 SSB_WARN_ON(count & 1);
584                 while (count) {
585                         *buf = (__force __le16)__raw_readw(addr);
586                         buf++;
587                         count -= 2;
588                 }
589                 break;
590         }
591         case sizeof(u32): {
592                 __le32 *buf = buffer;
593
594                 SSB_WARN_ON(count & 3);
595                 while (count) {
596                         *buf = (__force __le32)__raw_readl(addr);
597                         buf++;
598                         count -= 4;
599                 }
600                 break;
601         }
602         default:
603                 SSB_WARN_ON(1);
604         }
605 }
606 #endif /* CONFIG_SSB_BLOCKIO */
607
608 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
609 {
610         struct ssb_bus *bus = dev->bus;
611
612         offset += dev->core_index * SSB_CORE_SIZE;
613         writeb(value, bus->mmio + offset);
614 }
615
616 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
617 {
618         struct ssb_bus *bus = dev->bus;
619
620         offset += dev->core_index * SSB_CORE_SIZE;
621         writew(value, bus->mmio + offset);
622 }
623
624 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
625 {
626         struct ssb_bus *bus = dev->bus;
627
628         offset += dev->core_index * SSB_CORE_SIZE;
629         writel(value, bus->mmio + offset);
630 }
631
632 #ifdef CONFIG_SSB_BLOCKIO
633 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
634                                 size_t count, u16 offset, u8 reg_width)
635 {
636         struct ssb_bus *bus = dev->bus;
637         void __iomem *addr;
638
639         offset += dev->core_index * SSB_CORE_SIZE;
640         addr = bus->mmio + offset;
641
642         switch (reg_width) {
643         case sizeof(u8): {
644                 const u8 *buf = buffer;
645
646                 while (count) {
647                         __raw_writeb(*buf, addr);
648                         buf++;
649                         count--;
650                 }
651                 break;
652         }
653         case sizeof(u16): {
654                 const __le16 *buf = buffer;
655
656                 SSB_WARN_ON(count & 1);
657                 while (count) {
658                         __raw_writew((__force u16)(*buf), addr);
659                         buf++;
660                         count -= 2;
661                 }
662                 break;
663         }
664         case sizeof(u32): {
665                 const __le32 *buf = buffer;
666
667                 SSB_WARN_ON(count & 3);
668                 while (count) {
669                         __raw_writel((__force u32)(*buf), addr);
670                         buf++;
671                         count -= 4;
672                 }
673                 break;
674         }
675         default:
676                 SSB_WARN_ON(1);
677         }
678 }
679 #endif /* CONFIG_SSB_BLOCKIO */
680
681 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
682 static const struct ssb_bus_ops ssb_ssb_ops = {
683         .read8          = ssb_ssb_read8,
684         .read16         = ssb_ssb_read16,
685         .read32         = ssb_ssb_read32,
686         .write8         = ssb_ssb_write8,
687         .write16        = ssb_ssb_write16,
688         .write32        = ssb_ssb_write32,
689 #ifdef CONFIG_SSB_BLOCKIO
690         .block_read     = ssb_ssb_block_read,
691         .block_write    = ssb_ssb_block_write,
692 #endif
693 };
694
695 static int ssb_fetch_invariants(struct ssb_bus *bus,
696                                 ssb_invariants_func_t get_invariants)
697 {
698         struct ssb_init_invariants iv;
699         int err;
700
701         memset(&iv, 0, sizeof(iv));
702         err = get_invariants(bus, &iv);
703         if (err)
704                 goto out;
705         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
706         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
707         bus->has_cardbus_slot = iv.has_cardbus_slot;
708 out:
709         return err;
710 }
711
712 static int ssb_bus_register(struct ssb_bus *bus,
713                             ssb_invariants_func_t get_invariants,
714                             unsigned long baseaddr)
715 {
716         int err;
717
718         spin_lock_init(&bus->bar_lock);
719         INIT_LIST_HEAD(&bus->list);
720 #ifdef CONFIG_SSB_EMBEDDED
721         spin_lock_init(&bus->gpio_lock);
722 #endif
723
724         /* Powerup the bus */
725         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
726         if (err)
727                 goto out;
728         ssb_buses_lock();
729         bus->busnumber = next_busnumber;
730         /* Scan for devices (cores) */
731         err = ssb_bus_scan(bus, baseaddr);
732         if (err)
733                 goto err_disable_xtal;
734
735         /* Init PCI-host device (if any) */
736         err = ssb_pci_init(bus);
737         if (err)
738                 goto err_unmap;
739         /* Init PCMCIA-host device (if any) */
740         err = ssb_pcmcia_init(bus);
741         if (err)
742                 goto err_pci_exit;
743
744         /* Initialize basic system devices (if available) */
745         err = ssb_bus_powerup(bus, 0);
746         if (err)
747                 goto err_pcmcia_exit;
748         ssb_chipcommon_init(&bus->chipco);
749         ssb_mipscore_init(&bus->mipscore);
750         err = ssb_fetch_invariants(bus, get_invariants);
751         if (err) {
752                 ssb_bus_may_powerdown(bus);
753                 goto err_pcmcia_exit;
754         }
755         ssb_bus_may_powerdown(bus);
756
757         /* Queue it for attach.
758          * See the comment at the ssb_is_early_boot definition. */
759         list_add_tail(&bus->list, &attach_queue);
760         if (!ssb_is_early_boot) {
761                 /* This is not early boot, so we must attach the bus now */
762                 err = ssb_attach_queued_buses();
763                 if (err)
764                         goto err_dequeue;
765         }
766         next_busnumber++;
767         ssb_buses_unlock();
768
769 out:
770         return err;
771
772 err_dequeue:
773         list_del(&bus->list);
774 err_pcmcia_exit:
775         ssb_pcmcia_exit(bus);
776 err_pci_exit:
777         ssb_pci_exit(bus);
778 err_unmap:
779         ssb_iounmap(bus);
780 err_disable_xtal:
781         ssb_buses_unlock();
782         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
783         return err;
784 }
785
786 #ifdef CONFIG_SSB_PCIHOST
787 int ssb_bus_pcibus_register(struct ssb_bus *bus,
788                             struct pci_dev *host_pci)
789 {
790         int err;
791
792         bus->bustype = SSB_BUSTYPE_PCI;
793         bus->host_pci = host_pci;
794         bus->ops = &ssb_pci_ops;
795
796         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
797         if (!err) {
798                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
799                            "PCI device %s\n", host_pci->dev.bus_id);
800         }
801
802         return err;
803 }
804 EXPORT_SYMBOL(ssb_bus_pcibus_register);
805 #endif /* CONFIG_SSB_PCIHOST */
806
807 #ifdef CONFIG_SSB_PCMCIAHOST
808 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
809                                struct pcmcia_device *pcmcia_dev,
810                                unsigned long baseaddr)
811 {
812         int err;
813
814         bus->bustype = SSB_BUSTYPE_PCMCIA;
815         bus->host_pcmcia = pcmcia_dev;
816         bus->ops = &ssb_pcmcia_ops;
817
818         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
819         if (!err) {
820                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
821                            "PCMCIA device %s\n", pcmcia_dev->devname);
822         }
823
824         return err;
825 }
826 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
827 #endif /* CONFIG_SSB_PCMCIAHOST */
828
829 int ssb_bus_ssbbus_register(struct ssb_bus *bus,
830                             unsigned long baseaddr,
831                             ssb_invariants_func_t get_invariants)
832 {
833         int err;
834
835         bus->bustype = SSB_BUSTYPE_SSB;
836         bus->ops = &ssb_ssb_ops;
837
838         err = ssb_bus_register(bus, get_invariants, baseaddr);
839         if (!err) {
840                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
841                            "address 0x%08lX\n", baseaddr);
842         }
843
844         return err;
845 }
846
847 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
848 {
849         drv->drv.name = drv->name;
850         drv->drv.bus = &ssb_bustype;
851         drv->drv.owner = owner;
852
853         return driver_register(&drv->drv);
854 }
855 EXPORT_SYMBOL(__ssb_driver_register);
856
857 void ssb_driver_unregister(struct ssb_driver *drv)
858 {
859         driver_unregister(&drv->drv);
860 }
861 EXPORT_SYMBOL(ssb_driver_unregister);
862
863 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
864 {
865         struct ssb_bus *bus = dev->bus;
866         struct ssb_device *ent;
867         int i;
868
869         for (i = 0; i < bus->nr_devices; i++) {
870                 ent = &(bus->devices[i]);
871                 if (ent->id.vendor != dev->id.vendor)
872                         continue;
873                 if (ent->id.coreid != dev->id.coreid)
874                         continue;
875
876                 ent->devtypedata = data;
877         }
878 }
879 EXPORT_SYMBOL(ssb_set_devtypedata);
880
881 static u32 clkfactor_f6_resolve(u32 v)
882 {
883         /* map the magic values */
884         switch (v) {
885         case SSB_CHIPCO_CLK_F6_2:
886                 return 2;
887         case SSB_CHIPCO_CLK_F6_3:
888                 return 3;
889         case SSB_CHIPCO_CLK_F6_4:
890                 return 4;
891         case SSB_CHIPCO_CLK_F6_5:
892                 return 5;
893         case SSB_CHIPCO_CLK_F6_6:
894                 return 6;
895         case SSB_CHIPCO_CLK_F6_7:
896                 return 7;
897         }
898         return 0;
899 }
900
901 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
902 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
903 {
904         u32 n1, n2, clock, m1, m2, m3, mc;
905
906         n1 = (n & SSB_CHIPCO_CLK_N1);
907         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
908
909         switch (plltype) {
910         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
911                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
912                         return SSB_CHIPCO_CLK_T6_M0;
913                 return SSB_CHIPCO_CLK_T6_M1;
914         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
915         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
916         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
917         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
918                 n1 = clkfactor_f6_resolve(n1);
919                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
920                 break;
921         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
922                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
923                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
924                 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
925                 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
926                 break;
927         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
928                 return 100000000;
929         default:
930                 SSB_WARN_ON(1);
931         }
932
933         switch (plltype) {
934         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
935         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
936                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
937                 break;
938         default:
939                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
940         }
941         if (!clock)
942                 return 0;
943
944         m1 = (m & SSB_CHIPCO_CLK_M1);
945         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
946         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
947         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
948
949         switch (plltype) {
950         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
951         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
952         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
953         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
954                 m1 = clkfactor_f6_resolve(m1);
955                 if ((plltype == SSB_PLLTYPE_1) ||
956                     (plltype == SSB_PLLTYPE_3))
957                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
958                 else
959                         m2 = clkfactor_f6_resolve(m2);
960                 m3 = clkfactor_f6_resolve(m3);
961
962                 switch (mc) {
963                 case SSB_CHIPCO_CLK_MC_BYPASS:
964                         return clock;
965                 case SSB_CHIPCO_CLK_MC_M1:
966                         return (clock / m1);
967                 case SSB_CHIPCO_CLK_MC_M1M2:
968                         return (clock / (m1 * m2));
969                 case SSB_CHIPCO_CLK_MC_M1M2M3:
970                         return (clock / (m1 * m2 * m3));
971                 case SSB_CHIPCO_CLK_MC_M1M3:
972                         return (clock / (m1 * m3));
973                 }
974                 return 0;
975         case SSB_PLLTYPE_2:
976                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
977                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
978                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
979                 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
980                 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
981                 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
982
983                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
984                         clock /= m1;
985                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
986                         clock /= m2;
987                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
988                         clock /= m3;
989                 return clock;
990         default:
991                 SSB_WARN_ON(1);
992         }
993         return 0;
994 }
995
996 /* Get the current speed the backplane is running at */
997 u32 ssb_clockspeed(struct ssb_bus *bus)
998 {
999         u32 rate;
1000         u32 plltype;
1001         u32 clkctl_n, clkctl_m;
1002
1003         if (ssb_extif_available(&bus->extif))
1004                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1005                                            &clkctl_n, &clkctl_m);
1006         else if (bus->chipco.dev)
1007                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1008                                             &clkctl_n, &clkctl_m);
1009         else
1010                 return 0;
1011
1012         if (bus->chip_id == 0x5365) {
1013                 rate = 100000000;
1014         } else {
1015                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1016                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1017                         rate /= 2;
1018         }
1019
1020         return rate;
1021 }
1022 EXPORT_SYMBOL(ssb_clockspeed);
1023
1024 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1025 {
1026         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1027
1028         /* The REJECT bit changed position in TMSLOW between
1029          * Backplane revisions. */
1030         switch (rev) {
1031         case SSB_IDLOW_SSBREV_22:
1032                 return SSB_TMSLOW_REJECT_22;
1033         case SSB_IDLOW_SSBREV_23:
1034                 return SSB_TMSLOW_REJECT_23;
1035         case SSB_IDLOW_SSBREV_24:     /* TODO - find the proper REJECT bits */
1036         case SSB_IDLOW_SSBREV_25:     /* same here */
1037         case SSB_IDLOW_SSBREV_26:     /* same here */
1038         case SSB_IDLOW_SSBREV_27:     /* same here */
1039                 return SSB_TMSLOW_REJECT_23;    /* this is a guess */
1040         default:
1041                 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1042                 WARN_ON(1);
1043         }
1044         return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
1045 }
1046
1047 int ssb_device_is_enabled(struct ssb_device *dev)
1048 {
1049         u32 val;
1050         u32 reject;
1051
1052         reject = ssb_tmslow_reject_bitmask(dev);
1053         val = ssb_read32(dev, SSB_TMSLOW);
1054         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1055
1056         return (val == SSB_TMSLOW_CLOCK);
1057 }
1058 EXPORT_SYMBOL(ssb_device_is_enabled);
1059
1060 static void ssb_flush_tmslow(struct ssb_device *dev)
1061 {
1062         /* Make _really_ sure the device has finished the TMSLOW
1063          * register write transaction, as we risk running into
1064          * a machine check exception otherwise.
1065          * Do this by reading the register back to commit the
1066          * PCI write and delay an additional usec for the device
1067          * to react to the change. */
1068         ssb_read32(dev, SSB_TMSLOW);
1069         udelay(1);
1070 }
1071
1072 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1073 {
1074         u32 val;
1075
1076         ssb_device_disable(dev, core_specific_flags);
1077         ssb_write32(dev, SSB_TMSLOW,
1078                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1079                     SSB_TMSLOW_FGC | core_specific_flags);
1080         ssb_flush_tmslow(dev);
1081
1082         /* Clear SERR if set. This is a hw bug workaround. */
1083         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1084                 ssb_write32(dev, SSB_TMSHIGH, 0);
1085
1086         val = ssb_read32(dev, SSB_IMSTATE);
1087         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1088                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1089                 ssb_write32(dev, SSB_IMSTATE, val);
1090         }
1091
1092         ssb_write32(dev, SSB_TMSLOW,
1093                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1094                     core_specific_flags);
1095         ssb_flush_tmslow(dev);
1096
1097         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1098                     core_specific_flags);
1099         ssb_flush_tmslow(dev);
1100 }
1101 EXPORT_SYMBOL(ssb_device_enable);
1102
1103 /* Wait for a bit in a register to get set or unset.
1104  * timeout is in units of ten-microseconds */
1105 static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask,
1106                         int timeout, int set)
1107 {
1108         int i;
1109         u32 val;
1110
1111         for (i = 0; i < timeout; i++) {
1112                 val = ssb_read32(dev, reg);
1113                 if (set) {
1114                         if (val & bitmask)
1115                                 return 0;
1116                 } else {
1117                         if (!(val & bitmask))
1118                                 return 0;
1119                 }
1120                 udelay(10);
1121         }
1122         printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1123                             "register %04X to %s.\n",
1124                bitmask, reg, (set ? "set" : "clear"));
1125
1126         return -ETIMEDOUT;
1127 }
1128
1129 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1130 {
1131         u32 reject;
1132
1133         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1134                 return;
1135
1136         reject = ssb_tmslow_reject_bitmask(dev);
1137         ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1138         ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1);
1139         ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1140         ssb_write32(dev, SSB_TMSLOW,
1141                     SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1142                     reject | SSB_TMSLOW_RESET |
1143                     core_specific_flags);
1144         ssb_flush_tmslow(dev);
1145
1146         ssb_write32(dev, SSB_TMSLOW,
1147                     reject | SSB_TMSLOW_RESET |
1148                     core_specific_flags);
1149         ssb_flush_tmslow(dev);
1150 }
1151 EXPORT_SYMBOL(ssb_device_disable);
1152
1153 u32 ssb_dma_translation(struct ssb_device *dev)
1154 {
1155         switch (dev->bus->bustype) {
1156         case SSB_BUSTYPE_SSB:
1157                 return 0;
1158         case SSB_BUSTYPE_PCI:
1159                 return SSB_PCI_DMA;
1160         default:
1161                 __ssb_dma_not_implemented(dev);
1162         }
1163         return 0;
1164 }
1165 EXPORT_SYMBOL(ssb_dma_translation);
1166
1167 int ssb_dma_set_mask(struct ssb_device *dev, u64 mask)
1168 {
1169 #ifdef CONFIG_SSB_PCIHOST
1170         int err;
1171 #endif
1172
1173         switch (dev->bus->bustype) {
1174         case SSB_BUSTYPE_PCI:
1175 #ifdef CONFIG_SSB_PCIHOST
1176                 err = pci_set_dma_mask(dev->bus->host_pci, mask);
1177                 if (err)
1178                         return err;
1179                 err = pci_set_consistent_dma_mask(dev->bus->host_pci, mask);
1180                 return err;
1181 #endif
1182         case SSB_BUSTYPE_SSB:
1183                 return dma_set_mask(dev->dev, mask);
1184         default:
1185                 __ssb_dma_not_implemented(dev);
1186         }
1187         return -ENOSYS;
1188 }
1189 EXPORT_SYMBOL(ssb_dma_set_mask);
1190
1191 void * ssb_dma_alloc_consistent(struct ssb_device *dev, size_t size,
1192                                 dma_addr_t *dma_handle, gfp_t gfp_flags)
1193 {
1194         switch (dev->bus->bustype) {
1195         case SSB_BUSTYPE_PCI:
1196 #ifdef CONFIG_SSB_PCIHOST
1197                 if (gfp_flags & GFP_DMA) {
1198                         /* Workaround: The PCI API does not support passing
1199                          * a GFP flag. */
1200                         return dma_alloc_coherent(&dev->bus->host_pci->dev,
1201                                                   size, dma_handle, gfp_flags);
1202                 }
1203                 return pci_alloc_consistent(dev->bus->host_pci, size, dma_handle);
1204 #endif
1205         case SSB_BUSTYPE_SSB:
1206                 return dma_alloc_coherent(dev->dev, size, dma_handle, gfp_flags);
1207         default:
1208                 __ssb_dma_not_implemented(dev);
1209         }
1210         return NULL;
1211 }
1212 EXPORT_SYMBOL(ssb_dma_alloc_consistent);
1213
1214 void ssb_dma_free_consistent(struct ssb_device *dev, size_t size,
1215                              void *vaddr, dma_addr_t dma_handle,
1216                              gfp_t gfp_flags)
1217 {
1218         switch (dev->bus->bustype) {
1219         case SSB_BUSTYPE_PCI:
1220 #ifdef CONFIG_SSB_PCIHOST
1221                 if (gfp_flags & GFP_DMA) {
1222                         /* Workaround: The PCI API does not support passing
1223                          * a GFP flag. */
1224                         dma_free_coherent(&dev->bus->host_pci->dev,
1225                                           size, vaddr, dma_handle);
1226                         return;
1227                 }
1228                 pci_free_consistent(dev->bus->host_pci, size,
1229                                     vaddr, dma_handle);
1230                 return;
1231 #endif
1232         case SSB_BUSTYPE_SSB:
1233                 dma_free_coherent(dev->dev, size, vaddr, dma_handle);
1234                 return;
1235         default:
1236                 __ssb_dma_not_implemented(dev);
1237         }
1238 }
1239 EXPORT_SYMBOL(ssb_dma_free_consistent);
1240
1241 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1242 {
1243         struct ssb_chipcommon *cc;
1244         int err = 0;
1245
1246         /* On buses where more than one core may be working
1247          * at a time, we must not powerdown stuff if there are
1248          * still cores that may want to run. */
1249         if (bus->bustype == SSB_BUSTYPE_SSB)
1250                 goto out;
1251
1252         cc = &bus->chipco;
1253
1254         if (!cc->dev)
1255                 goto out;
1256         if (cc->dev->id.revision < 5)
1257                 goto out;
1258
1259         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1260         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1261         if (err)
1262                 goto error;
1263 out:
1264 #ifdef CONFIG_SSB_DEBUG
1265         bus->powered_up = 0;
1266 #endif
1267         return err;
1268 error:
1269         ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1270         goto out;
1271 }
1272 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1273
1274 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1275 {
1276         struct ssb_chipcommon *cc;
1277         int err;
1278         enum ssb_clkmode mode;
1279
1280         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1281         if (err)
1282                 goto error;
1283         cc = &bus->chipco;
1284         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1285         ssb_chipco_set_clockmode(cc, mode);
1286
1287 #ifdef CONFIG_SSB_DEBUG
1288         bus->powered_up = 1;
1289 #endif
1290         return 0;
1291 error:
1292         ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1293         return err;
1294 }
1295 EXPORT_SYMBOL(ssb_bus_powerup);
1296
1297 u32 ssb_admatch_base(u32 adm)
1298 {
1299         u32 base = 0;
1300
1301         switch (adm & SSB_ADM_TYPE) {
1302         case SSB_ADM_TYPE0:
1303                 base = (adm & SSB_ADM_BASE0);
1304                 break;
1305         case SSB_ADM_TYPE1:
1306                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1307                 base = (adm & SSB_ADM_BASE1);
1308                 break;
1309         case SSB_ADM_TYPE2:
1310                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1311                 base = (adm & SSB_ADM_BASE2);
1312                 break;
1313         default:
1314                 SSB_WARN_ON(1);
1315         }
1316
1317         return base;
1318 }
1319 EXPORT_SYMBOL(ssb_admatch_base);
1320
1321 u32 ssb_admatch_size(u32 adm)
1322 {
1323         u32 size = 0;
1324
1325         switch (adm & SSB_ADM_TYPE) {
1326         case SSB_ADM_TYPE0:
1327                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1328                 break;
1329         case SSB_ADM_TYPE1:
1330                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1331                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1332                 break;
1333         case SSB_ADM_TYPE2:
1334                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1335                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1336                 break;
1337         default:
1338                 SSB_WARN_ON(1);
1339         }
1340         size = (1 << (size + 1));
1341
1342         return size;
1343 }
1344 EXPORT_SYMBOL(ssb_admatch_size);
1345
1346 static int __init ssb_modinit(void)
1347 {
1348         int err;
1349
1350         /* See the comment at the ssb_is_early_boot definition */
1351         ssb_is_early_boot = 0;
1352         err = bus_register(&ssb_bustype);
1353         if (err)
1354                 return err;
1355
1356         /* Maybe we already registered some buses at early boot.
1357          * Check for this and attach them
1358          */
1359         ssb_buses_lock();
1360         err = ssb_attach_queued_buses();
1361         ssb_buses_unlock();
1362         if (err)
1363                 bus_unregister(&ssb_bustype);
1364
1365         err = b43_pci_ssb_bridge_init();
1366         if (err) {
1367                 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1368                            "initialization failed\n");
1369                 /* don't fail SSB init because of this */
1370                 err = 0;
1371         }
1372         err = ssb_gige_init();
1373         if (err) {
1374                 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1375                            "driver initialization failed\n");
1376                 /* don't fail SSB init because of this */
1377                 err = 0;
1378         }
1379
1380         return err;
1381 }
1382 /* ssb must be initialized after PCI but before the ssb drivers.
1383  * That means we must use some initcall between subsys_initcall
1384  * and device_initcall. */
1385 fs_initcall(ssb_modinit);
1386
1387 static void __exit ssb_modexit(void)
1388 {
1389         ssb_gige_exit();
1390         b43_pci_ssb_bridge_exit();
1391         bus_unregister(&ssb_bustype);
1392 }
1393 module_exit(ssb_modexit)