Fix common misspellings
[linux-2.6.git] / 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 #include <linux/mmc/sdio_func.h>
21 #include <linux/slab.h>
22
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 #ifdef CONFIG_SSB_SDIOHOST
92 struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
93 {
94         struct ssb_bus *bus;
95
96         ssb_buses_lock();
97         list_for_each_entry(bus, &buses, list) {
98                 if (bus->bustype == SSB_BUSTYPE_SDIO &&
99                     bus->host_sdio == func)
100                         goto found;
101         }
102         bus = NULL;
103 found:
104         ssb_buses_unlock();
105
106         return bus;
107 }
108 #endif /* CONFIG_SSB_SDIOHOST */
109
110 int ssb_for_each_bus_call(unsigned long data,
111                           int (*func)(struct ssb_bus *bus, unsigned long data))
112 {
113         struct ssb_bus *bus;
114         int res;
115
116         ssb_buses_lock();
117         list_for_each_entry(bus, &buses, list) {
118                 res = func(bus, data);
119                 if (res >= 0) {
120                         ssb_buses_unlock();
121                         return res;
122                 }
123         }
124         ssb_buses_unlock();
125
126         return -ENODEV;
127 }
128
129 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
130 {
131         if (dev)
132                 get_device(dev->dev);
133         return dev;
134 }
135
136 static void ssb_device_put(struct ssb_device *dev)
137 {
138         if (dev)
139                 put_device(dev->dev);
140 }
141
142 static inline struct ssb_driver *ssb_driver_get(struct ssb_driver *drv)
143 {
144         if (drv)
145                 get_driver(&drv->drv);
146         return drv;
147 }
148
149 static inline void ssb_driver_put(struct ssb_driver *drv)
150 {
151         if (drv)
152                 put_driver(&drv->drv);
153 }
154
155 static int ssb_device_resume(struct device *dev)
156 {
157         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
158         struct ssb_driver *ssb_drv;
159         int err = 0;
160
161         if (dev->driver) {
162                 ssb_drv = drv_to_ssb_drv(dev->driver);
163                 if (ssb_drv && ssb_drv->resume)
164                         err = ssb_drv->resume(ssb_dev);
165                 if (err)
166                         goto out;
167         }
168 out:
169         return err;
170 }
171
172 static int ssb_device_suspend(struct device *dev, pm_message_t state)
173 {
174         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
175         struct ssb_driver *ssb_drv;
176         int err = 0;
177
178         if (dev->driver) {
179                 ssb_drv = drv_to_ssb_drv(dev->driver);
180                 if (ssb_drv && ssb_drv->suspend)
181                         err = ssb_drv->suspend(ssb_dev, state);
182                 if (err)
183                         goto out;
184         }
185 out:
186         return err;
187 }
188
189 int ssb_bus_resume(struct ssb_bus *bus)
190 {
191         int err;
192
193         /* Reset HW state information in memory, so that HW is
194          * completely reinitialized. */
195         bus->mapped_device = NULL;
196 #ifdef CONFIG_SSB_DRIVER_PCICORE
197         bus->pcicore.setup_done = 0;
198 #endif
199
200         err = ssb_bus_powerup(bus, 0);
201         if (err)
202                 return err;
203         err = ssb_pcmcia_hardware_setup(bus);
204         if (err) {
205                 ssb_bus_may_powerdown(bus);
206                 return err;
207         }
208         ssb_chipco_resume(&bus->chipco);
209         ssb_bus_may_powerdown(bus);
210
211         return 0;
212 }
213 EXPORT_SYMBOL(ssb_bus_resume);
214
215 int ssb_bus_suspend(struct ssb_bus *bus)
216 {
217         ssb_chipco_suspend(&bus->chipco);
218         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
219
220         return 0;
221 }
222 EXPORT_SYMBOL(ssb_bus_suspend);
223
224 #ifdef CONFIG_SSB_SPROM
225 /** ssb_devices_freeze - Freeze all devices on the bus.
226  *
227  * After freezing no device driver will be handling a device
228  * on this bus anymore. ssb_devices_thaw() must be called after
229  * a successful freeze to reactivate the devices.
230  *
231  * @bus: The bus.
232  * @ctx: Context structure. Pass this to ssb_devices_thaw().
233  */
234 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
235 {
236         struct ssb_device *sdev;
237         struct ssb_driver *sdrv;
238         unsigned int i;
239
240         memset(ctx, 0, sizeof(*ctx));
241         ctx->bus = bus;
242         SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
243
244         for (i = 0; i < bus->nr_devices; i++) {
245                 sdev = ssb_device_get(&bus->devices[i]);
246
247                 if (!sdev->dev || !sdev->dev->driver ||
248                     !device_is_registered(sdev->dev)) {
249                         ssb_device_put(sdev);
250                         continue;
251                 }
252                 sdrv = ssb_driver_get(drv_to_ssb_drv(sdev->dev->driver));
253                 if (!sdrv || SSB_WARN_ON(!sdrv->remove)) {
254                         ssb_device_put(sdev);
255                         continue;
256                 }
257                 sdrv->remove(sdev);
258                 ctx->device_frozen[i] = 1;
259         }
260
261         return 0;
262 }
263
264 /** ssb_devices_thaw - Unfreeze all devices on the bus.
265  *
266  * This will re-attach the device drivers and re-init the devices.
267  *
268  * @ctx: The context structure from ssb_devices_freeze()
269  */
270 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
271 {
272         struct ssb_bus *bus = ctx->bus;
273         struct ssb_device *sdev;
274         struct ssb_driver *sdrv;
275         unsigned int i;
276         int err, result = 0;
277
278         for (i = 0; i < bus->nr_devices; i++) {
279                 if (!ctx->device_frozen[i])
280                         continue;
281                 sdev = &bus->devices[i];
282
283                 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
284                         continue;
285                 sdrv = drv_to_ssb_drv(sdev->dev->driver);
286                 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
287                         continue;
288
289                 err = sdrv->probe(sdev, &sdev->id);
290                 if (err) {
291                         ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
292                                    dev_name(sdev->dev));
293                         result = err;
294                 }
295                 ssb_driver_put(sdrv);
296                 ssb_device_put(sdev);
297         }
298
299         return result;
300 }
301 #endif /* CONFIG_SSB_SPROM */
302
303 static void ssb_device_shutdown(struct device *dev)
304 {
305         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
306         struct ssb_driver *ssb_drv;
307
308         if (!dev->driver)
309                 return;
310         ssb_drv = drv_to_ssb_drv(dev->driver);
311         if (ssb_drv && ssb_drv->shutdown)
312                 ssb_drv->shutdown(ssb_dev);
313 }
314
315 static int ssb_device_remove(struct device *dev)
316 {
317         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
318         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
319
320         if (ssb_drv && ssb_drv->remove)
321                 ssb_drv->remove(ssb_dev);
322         ssb_device_put(ssb_dev);
323
324         return 0;
325 }
326
327 static int ssb_device_probe(struct device *dev)
328 {
329         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
330         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
331         int err = 0;
332
333         ssb_device_get(ssb_dev);
334         if (ssb_drv && ssb_drv->probe)
335                 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
336         if (err)
337                 ssb_device_put(ssb_dev);
338
339         return err;
340 }
341
342 static int ssb_match_devid(const struct ssb_device_id *tabid,
343                            const struct ssb_device_id *devid)
344 {
345         if ((tabid->vendor != devid->vendor) &&
346             tabid->vendor != SSB_ANY_VENDOR)
347                 return 0;
348         if ((tabid->coreid != devid->coreid) &&
349             tabid->coreid != SSB_ANY_ID)
350                 return 0;
351         if ((tabid->revision != devid->revision) &&
352             tabid->revision != SSB_ANY_REV)
353                 return 0;
354         return 1;
355 }
356
357 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
358 {
359         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
360         struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
361         const struct ssb_device_id *id;
362
363         for (id = ssb_drv->id_table;
364              id->vendor || id->coreid || id->revision;
365              id++) {
366                 if (ssb_match_devid(id, &ssb_dev->id))
367                         return 1; /* found */
368         }
369
370         return 0;
371 }
372
373 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
374 {
375         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
376
377         if (!dev)
378                 return -ENODEV;
379
380         return add_uevent_var(env,
381                              "MODALIAS=ssb:v%04Xid%04Xrev%02X",
382                              ssb_dev->id.vendor, ssb_dev->id.coreid,
383                              ssb_dev->id.revision);
384 }
385
386 #define ssb_config_attr(attrib, field, format_string) \
387 static ssize_t \
388 attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
389 { \
390         return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
391 }
392
393 ssb_config_attr(core_num, core_index, "%u\n")
394 ssb_config_attr(coreid, id.coreid, "0x%04x\n")
395 ssb_config_attr(vendor, id.vendor, "0x%04x\n")
396 ssb_config_attr(revision, id.revision, "%u\n")
397 ssb_config_attr(irq, irq, "%u\n")
398 static ssize_t
399 name_show(struct device *dev, struct device_attribute *attr, char *buf)
400 {
401         return sprintf(buf, "%s\n",
402                        ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
403 }
404
405 static struct device_attribute ssb_device_attrs[] = {
406         __ATTR_RO(name),
407         __ATTR_RO(core_num),
408         __ATTR_RO(coreid),
409         __ATTR_RO(vendor),
410         __ATTR_RO(revision),
411         __ATTR_RO(irq),
412         __ATTR_NULL,
413 };
414
415 static struct bus_type ssb_bustype = {
416         .name           = "ssb",
417         .match          = ssb_bus_match,
418         .probe          = ssb_device_probe,
419         .remove         = ssb_device_remove,
420         .shutdown       = ssb_device_shutdown,
421         .suspend        = ssb_device_suspend,
422         .resume         = ssb_device_resume,
423         .uevent         = ssb_device_uevent,
424         .dev_attrs      = ssb_device_attrs,
425 };
426
427 static void ssb_buses_lock(void)
428 {
429         /* See the comment at the ssb_is_early_boot definition */
430         if (!ssb_is_early_boot)
431                 mutex_lock(&buses_mutex);
432 }
433
434 static void ssb_buses_unlock(void)
435 {
436         /* See the comment at the ssb_is_early_boot definition */
437         if (!ssb_is_early_boot)
438                 mutex_unlock(&buses_mutex);
439 }
440
441 static void ssb_devices_unregister(struct ssb_bus *bus)
442 {
443         struct ssb_device *sdev;
444         int i;
445
446         for (i = bus->nr_devices - 1; i >= 0; i--) {
447                 sdev = &(bus->devices[i]);
448                 if (sdev->dev)
449                         device_unregister(sdev->dev);
450         }
451 }
452
453 void ssb_bus_unregister(struct ssb_bus *bus)
454 {
455         ssb_buses_lock();
456         ssb_devices_unregister(bus);
457         list_del(&bus->list);
458         ssb_buses_unlock();
459
460         ssb_pcmcia_exit(bus);
461         ssb_pci_exit(bus);
462         ssb_iounmap(bus);
463 }
464 EXPORT_SYMBOL(ssb_bus_unregister);
465
466 static void ssb_release_dev(struct device *dev)
467 {
468         struct __ssb_dev_wrapper *devwrap;
469
470         devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
471         kfree(devwrap);
472 }
473
474 static int ssb_devices_register(struct ssb_bus *bus)
475 {
476         struct ssb_device *sdev;
477         struct device *dev;
478         struct __ssb_dev_wrapper *devwrap;
479         int i, err = 0;
480         int dev_idx = 0;
481
482         for (i = 0; i < bus->nr_devices; i++) {
483                 sdev = &(bus->devices[i]);
484
485                 /* We don't register SSB-system devices to the kernel,
486                  * as the drivers for them are built into SSB. */
487                 switch (sdev->id.coreid) {
488                 case SSB_DEV_CHIPCOMMON:
489                 case SSB_DEV_PCI:
490                 case SSB_DEV_PCIE:
491                 case SSB_DEV_PCMCIA:
492                 case SSB_DEV_MIPS:
493                 case SSB_DEV_MIPS_3302:
494                 case SSB_DEV_EXTIF:
495                         continue;
496                 }
497
498                 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
499                 if (!devwrap) {
500                         ssb_printk(KERN_ERR PFX
501                                    "Could not allocate device\n");
502                         err = -ENOMEM;
503                         goto error;
504                 }
505                 dev = &devwrap->dev;
506                 devwrap->sdev = sdev;
507
508                 dev->release = ssb_release_dev;
509                 dev->bus = &ssb_bustype;
510                 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
511
512                 switch (bus->bustype) {
513                 case SSB_BUSTYPE_PCI:
514 #ifdef CONFIG_SSB_PCIHOST
515                         sdev->irq = bus->host_pci->irq;
516                         dev->parent = &bus->host_pci->dev;
517                         sdev->dma_dev = dev->parent;
518 #endif
519                         break;
520                 case SSB_BUSTYPE_PCMCIA:
521 #ifdef CONFIG_SSB_PCMCIAHOST
522                         sdev->irq = bus->host_pcmcia->irq;
523                         dev->parent = &bus->host_pcmcia->dev;
524 #endif
525                         break;
526                 case SSB_BUSTYPE_SDIO:
527 #ifdef CONFIG_SSB_SDIOHOST
528                         dev->parent = &bus->host_sdio->dev;
529 #endif
530                         break;
531                 case SSB_BUSTYPE_SSB:
532                         dev->dma_mask = &dev->coherent_dma_mask;
533                         sdev->dma_dev = dev;
534                         break;
535                 }
536
537                 sdev->dev = dev;
538                 err = device_register(dev);
539                 if (err) {
540                         ssb_printk(KERN_ERR PFX
541                                    "Could not register %s\n",
542                                    dev_name(dev));
543                         /* Set dev to NULL to not unregister
544                          * dev on error unwinding. */
545                         sdev->dev = NULL;
546                         kfree(devwrap);
547                         goto error;
548                 }
549                 dev_idx++;
550         }
551
552         return 0;
553 error:
554         /* Unwind the already registered devices. */
555         ssb_devices_unregister(bus);
556         return err;
557 }
558
559 /* Needs ssb_buses_lock() */
560 static int ssb_attach_queued_buses(void)
561 {
562         struct ssb_bus *bus, *n;
563         int err = 0;
564         int drop_them_all = 0;
565
566         list_for_each_entry_safe(bus, n, &attach_queue, list) {
567                 if (drop_them_all) {
568                         list_del(&bus->list);
569                         continue;
570                 }
571                 /* Can't init the PCIcore in ssb_bus_register(), as that
572                  * is too early in boot for embedded systems
573                  * (no udelay() available). So do it here in attach stage.
574                  */
575                 err = ssb_bus_powerup(bus, 0);
576                 if (err)
577                         goto error;
578                 ssb_pcicore_init(&bus->pcicore);
579                 ssb_bus_may_powerdown(bus);
580
581                 err = ssb_devices_register(bus);
582 error:
583                 if (err) {
584                         drop_them_all = 1;
585                         list_del(&bus->list);
586                         continue;
587                 }
588                 list_move_tail(&bus->list, &buses);
589         }
590
591         return err;
592 }
593
594 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
595 {
596         struct ssb_bus *bus = dev->bus;
597
598         offset += dev->core_index * SSB_CORE_SIZE;
599         return readb(bus->mmio + offset);
600 }
601
602 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
603 {
604         struct ssb_bus *bus = dev->bus;
605
606         offset += dev->core_index * SSB_CORE_SIZE;
607         return readw(bus->mmio + offset);
608 }
609
610 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
611 {
612         struct ssb_bus *bus = dev->bus;
613
614         offset += dev->core_index * SSB_CORE_SIZE;
615         return readl(bus->mmio + offset);
616 }
617
618 #ifdef CONFIG_SSB_BLOCKIO
619 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
620                                size_t count, u16 offset, u8 reg_width)
621 {
622         struct ssb_bus *bus = dev->bus;
623         void __iomem *addr;
624
625         offset += dev->core_index * SSB_CORE_SIZE;
626         addr = bus->mmio + offset;
627
628         switch (reg_width) {
629         case sizeof(u8): {
630                 u8 *buf = buffer;
631
632                 while (count) {
633                         *buf = __raw_readb(addr);
634                         buf++;
635                         count--;
636                 }
637                 break;
638         }
639         case sizeof(u16): {
640                 __le16 *buf = buffer;
641
642                 SSB_WARN_ON(count & 1);
643                 while (count) {
644                         *buf = (__force __le16)__raw_readw(addr);
645                         buf++;
646                         count -= 2;
647                 }
648                 break;
649         }
650         case sizeof(u32): {
651                 __le32 *buf = buffer;
652
653                 SSB_WARN_ON(count & 3);
654                 while (count) {
655                         *buf = (__force __le32)__raw_readl(addr);
656                         buf++;
657                         count -= 4;
658                 }
659                 break;
660         }
661         default:
662                 SSB_WARN_ON(1);
663         }
664 }
665 #endif /* CONFIG_SSB_BLOCKIO */
666
667 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
668 {
669         struct ssb_bus *bus = dev->bus;
670
671         offset += dev->core_index * SSB_CORE_SIZE;
672         writeb(value, bus->mmio + offset);
673 }
674
675 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
676 {
677         struct ssb_bus *bus = dev->bus;
678
679         offset += dev->core_index * SSB_CORE_SIZE;
680         writew(value, bus->mmio + offset);
681 }
682
683 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
684 {
685         struct ssb_bus *bus = dev->bus;
686
687         offset += dev->core_index * SSB_CORE_SIZE;
688         writel(value, bus->mmio + offset);
689 }
690
691 #ifdef CONFIG_SSB_BLOCKIO
692 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
693                                 size_t count, u16 offset, u8 reg_width)
694 {
695         struct ssb_bus *bus = dev->bus;
696         void __iomem *addr;
697
698         offset += dev->core_index * SSB_CORE_SIZE;
699         addr = bus->mmio + offset;
700
701         switch (reg_width) {
702         case sizeof(u8): {
703                 const u8 *buf = buffer;
704
705                 while (count) {
706                         __raw_writeb(*buf, addr);
707                         buf++;
708                         count--;
709                 }
710                 break;
711         }
712         case sizeof(u16): {
713                 const __le16 *buf = buffer;
714
715                 SSB_WARN_ON(count & 1);
716                 while (count) {
717                         __raw_writew((__force u16)(*buf), addr);
718                         buf++;
719                         count -= 2;
720                 }
721                 break;
722         }
723         case sizeof(u32): {
724                 const __le32 *buf = buffer;
725
726                 SSB_WARN_ON(count & 3);
727                 while (count) {
728                         __raw_writel((__force u32)(*buf), addr);
729                         buf++;
730                         count -= 4;
731                 }
732                 break;
733         }
734         default:
735                 SSB_WARN_ON(1);
736         }
737 }
738 #endif /* CONFIG_SSB_BLOCKIO */
739
740 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
741 static const struct ssb_bus_ops ssb_ssb_ops = {
742         .read8          = ssb_ssb_read8,
743         .read16         = ssb_ssb_read16,
744         .read32         = ssb_ssb_read32,
745         .write8         = ssb_ssb_write8,
746         .write16        = ssb_ssb_write16,
747         .write32        = ssb_ssb_write32,
748 #ifdef CONFIG_SSB_BLOCKIO
749         .block_read     = ssb_ssb_block_read,
750         .block_write    = ssb_ssb_block_write,
751 #endif
752 };
753
754 static int ssb_fetch_invariants(struct ssb_bus *bus,
755                                 ssb_invariants_func_t get_invariants)
756 {
757         struct ssb_init_invariants iv;
758         int err;
759
760         memset(&iv, 0, sizeof(iv));
761         err = get_invariants(bus, &iv);
762         if (err)
763                 goto out;
764         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
765         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
766         bus->has_cardbus_slot = iv.has_cardbus_slot;
767 out:
768         return err;
769 }
770
771 static int ssb_bus_register(struct ssb_bus *bus,
772                             ssb_invariants_func_t get_invariants,
773                             unsigned long baseaddr)
774 {
775         int err;
776
777         spin_lock_init(&bus->bar_lock);
778         INIT_LIST_HEAD(&bus->list);
779 #ifdef CONFIG_SSB_EMBEDDED
780         spin_lock_init(&bus->gpio_lock);
781 #endif
782
783         /* Powerup the bus */
784         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
785         if (err)
786                 goto out;
787
788         /* Init SDIO-host device (if any), before the scan */
789         err = ssb_sdio_init(bus);
790         if (err)
791                 goto err_disable_xtal;
792
793         ssb_buses_lock();
794         bus->busnumber = next_busnumber;
795         /* Scan for devices (cores) */
796         err = ssb_bus_scan(bus, baseaddr);
797         if (err)
798                 goto err_sdio_exit;
799
800         /* Init PCI-host device (if any) */
801         err = ssb_pci_init(bus);
802         if (err)
803                 goto err_unmap;
804         /* Init PCMCIA-host device (if any) */
805         err = ssb_pcmcia_init(bus);
806         if (err)
807                 goto err_pci_exit;
808
809         /* Initialize basic system devices (if available) */
810         err = ssb_bus_powerup(bus, 0);
811         if (err)
812                 goto err_pcmcia_exit;
813         ssb_chipcommon_init(&bus->chipco);
814         ssb_mipscore_init(&bus->mipscore);
815         err = ssb_fetch_invariants(bus, get_invariants);
816         if (err) {
817                 ssb_bus_may_powerdown(bus);
818                 goto err_pcmcia_exit;
819         }
820         ssb_bus_may_powerdown(bus);
821
822         /* Queue it for attach.
823          * See the comment at the ssb_is_early_boot definition. */
824         list_add_tail(&bus->list, &attach_queue);
825         if (!ssb_is_early_boot) {
826                 /* This is not early boot, so we must attach the bus now */
827                 err = ssb_attach_queued_buses();
828                 if (err)
829                         goto err_dequeue;
830         }
831         next_busnumber++;
832         ssb_buses_unlock();
833
834 out:
835         return err;
836
837 err_dequeue:
838         list_del(&bus->list);
839 err_pcmcia_exit:
840         ssb_pcmcia_exit(bus);
841 err_pci_exit:
842         ssb_pci_exit(bus);
843 err_unmap:
844         ssb_iounmap(bus);
845 err_sdio_exit:
846         ssb_sdio_exit(bus);
847 err_disable_xtal:
848         ssb_buses_unlock();
849         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
850         return err;
851 }
852
853 #ifdef CONFIG_SSB_PCIHOST
854 int ssb_bus_pcibus_register(struct ssb_bus *bus,
855                             struct pci_dev *host_pci)
856 {
857         int err;
858
859         bus->bustype = SSB_BUSTYPE_PCI;
860         bus->host_pci = host_pci;
861         bus->ops = &ssb_pci_ops;
862
863         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
864         if (!err) {
865                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
866                            "PCI device %s\n", dev_name(&host_pci->dev));
867         } else {
868                 ssb_printk(KERN_ERR PFX "Failed to register PCI version"
869                            " of SSB with error %d\n", err);
870         }
871
872         return err;
873 }
874 EXPORT_SYMBOL(ssb_bus_pcibus_register);
875 #endif /* CONFIG_SSB_PCIHOST */
876
877 #ifdef CONFIG_SSB_PCMCIAHOST
878 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
879                                struct pcmcia_device *pcmcia_dev,
880                                unsigned long baseaddr)
881 {
882         int err;
883
884         bus->bustype = SSB_BUSTYPE_PCMCIA;
885         bus->host_pcmcia = pcmcia_dev;
886         bus->ops = &ssb_pcmcia_ops;
887
888         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
889         if (!err) {
890                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
891                            "PCMCIA device %s\n", pcmcia_dev->devname);
892         }
893
894         return err;
895 }
896 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
897 #endif /* CONFIG_SSB_PCMCIAHOST */
898
899 #ifdef CONFIG_SSB_SDIOHOST
900 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
901                              unsigned int quirks)
902 {
903         int err;
904
905         bus->bustype = SSB_BUSTYPE_SDIO;
906         bus->host_sdio = func;
907         bus->ops = &ssb_sdio_ops;
908         bus->quirks = quirks;
909
910         err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
911         if (!err) {
912                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
913                            "SDIO device %s\n", sdio_func_id(func));
914         }
915
916         return err;
917 }
918 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
919 #endif /* CONFIG_SSB_PCMCIAHOST */
920
921 int ssb_bus_ssbbus_register(struct ssb_bus *bus,
922                             unsigned long baseaddr,
923                             ssb_invariants_func_t get_invariants)
924 {
925         int err;
926
927         bus->bustype = SSB_BUSTYPE_SSB;
928         bus->ops = &ssb_ssb_ops;
929
930         err = ssb_bus_register(bus, get_invariants, baseaddr);
931         if (!err) {
932                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
933                            "address 0x%08lX\n", baseaddr);
934         }
935
936         return err;
937 }
938
939 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
940 {
941         drv->drv.name = drv->name;
942         drv->drv.bus = &ssb_bustype;
943         drv->drv.owner = owner;
944
945         return driver_register(&drv->drv);
946 }
947 EXPORT_SYMBOL(__ssb_driver_register);
948
949 void ssb_driver_unregister(struct ssb_driver *drv)
950 {
951         driver_unregister(&drv->drv);
952 }
953 EXPORT_SYMBOL(ssb_driver_unregister);
954
955 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
956 {
957         struct ssb_bus *bus = dev->bus;
958         struct ssb_device *ent;
959         int i;
960
961         for (i = 0; i < bus->nr_devices; i++) {
962                 ent = &(bus->devices[i]);
963                 if (ent->id.vendor != dev->id.vendor)
964                         continue;
965                 if (ent->id.coreid != dev->id.coreid)
966                         continue;
967
968                 ent->devtypedata = data;
969         }
970 }
971 EXPORT_SYMBOL(ssb_set_devtypedata);
972
973 static u32 clkfactor_f6_resolve(u32 v)
974 {
975         /* map the magic values */
976         switch (v) {
977         case SSB_CHIPCO_CLK_F6_2:
978                 return 2;
979         case SSB_CHIPCO_CLK_F6_3:
980                 return 3;
981         case SSB_CHIPCO_CLK_F6_4:
982                 return 4;
983         case SSB_CHIPCO_CLK_F6_5:
984                 return 5;
985         case SSB_CHIPCO_CLK_F6_6:
986                 return 6;
987         case SSB_CHIPCO_CLK_F6_7:
988                 return 7;
989         }
990         return 0;
991 }
992
993 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
994 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
995 {
996         u32 n1, n2, clock, m1, m2, m3, mc;
997
998         n1 = (n & SSB_CHIPCO_CLK_N1);
999         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
1000
1001         switch (plltype) {
1002         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
1003                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
1004                         return SSB_CHIPCO_CLK_T6_M0;
1005                 return SSB_CHIPCO_CLK_T6_M1;
1006         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1007         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1008         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1009         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1010                 n1 = clkfactor_f6_resolve(n1);
1011                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1012                 break;
1013         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1014                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1015                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1016                 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1017                 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1018                 break;
1019         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1020                 return 100000000;
1021         default:
1022                 SSB_WARN_ON(1);
1023         }
1024
1025         switch (plltype) {
1026         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1027         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1028                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1029                 break;
1030         default:
1031                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1032         }
1033         if (!clock)
1034                 return 0;
1035
1036         m1 = (m & SSB_CHIPCO_CLK_M1);
1037         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1038         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1039         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1040
1041         switch (plltype) {
1042         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1043         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1044         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1045         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1046                 m1 = clkfactor_f6_resolve(m1);
1047                 if ((plltype == SSB_PLLTYPE_1) ||
1048                     (plltype == SSB_PLLTYPE_3))
1049                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
1050                 else
1051                         m2 = clkfactor_f6_resolve(m2);
1052                 m3 = clkfactor_f6_resolve(m3);
1053
1054                 switch (mc) {
1055                 case SSB_CHIPCO_CLK_MC_BYPASS:
1056                         return clock;
1057                 case SSB_CHIPCO_CLK_MC_M1:
1058                         return (clock / m1);
1059                 case SSB_CHIPCO_CLK_MC_M1M2:
1060                         return (clock / (m1 * m2));
1061                 case SSB_CHIPCO_CLK_MC_M1M2M3:
1062                         return (clock / (m1 * m2 * m3));
1063                 case SSB_CHIPCO_CLK_MC_M1M3:
1064                         return (clock / (m1 * m3));
1065                 }
1066                 return 0;
1067         case SSB_PLLTYPE_2:
1068                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1069                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1070                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1071                 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1072                 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1073                 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1074
1075                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1076                         clock /= m1;
1077                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1078                         clock /= m2;
1079                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1080                         clock /= m3;
1081                 return clock;
1082         default:
1083                 SSB_WARN_ON(1);
1084         }
1085         return 0;
1086 }
1087
1088 /* Get the current speed the backplane is running at */
1089 u32 ssb_clockspeed(struct ssb_bus *bus)
1090 {
1091         u32 rate;
1092         u32 plltype;
1093         u32 clkctl_n, clkctl_m;
1094
1095         if (ssb_extif_available(&bus->extif))
1096                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1097                                            &clkctl_n, &clkctl_m);
1098         else if (bus->chipco.dev)
1099                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1100                                             &clkctl_n, &clkctl_m);
1101         else
1102                 return 0;
1103
1104         if (bus->chip_id == 0x5365) {
1105                 rate = 100000000;
1106         } else {
1107                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1108                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1109                         rate /= 2;
1110         }
1111
1112         return rate;
1113 }
1114 EXPORT_SYMBOL(ssb_clockspeed);
1115
1116 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1117 {
1118         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1119
1120         /* The REJECT bit changed position in TMSLOW between
1121          * Backplane revisions. */
1122         switch (rev) {
1123         case SSB_IDLOW_SSBREV_22:
1124                 return SSB_TMSLOW_REJECT_22;
1125         case SSB_IDLOW_SSBREV_23:
1126                 return SSB_TMSLOW_REJECT_23;
1127         case SSB_IDLOW_SSBREV_24:     /* TODO - find the proper REJECT bits */
1128         case SSB_IDLOW_SSBREV_25:     /* same here */
1129         case SSB_IDLOW_SSBREV_26:     /* same here */
1130         case SSB_IDLOW_SSBREV_27:     /* same here */
1131                 return SSB_TMSLOW_REJECT_23;    /* this is a guess */
1132         default:
1133                 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1134                 WARN_ON(1);
1135         }
1136         return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
1137 }
1138
1139 int ssb_device_is_enabled(struct ssb_device *dev)
1140 {
1141         u32 val;
1142         u32 reject;
1143
1144         reject = ssb_tmslow_reject_bitmask(dev);
1145         val = ssb_read32(dev, SSB_TMSLOW);
1146         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1147
1148         return (val == SSB_TMSLOW_CLOCK);
1149 }
1150 EXPORT_SYMBOL(ssb_device_is_enabled);
1151
1152 static void ssb_flush_tmslow(struct ssb_device *dev)
1153 {
1154         /* Make _really_ sure the device has finished the TMSLOW
1155          * register write transaction, as we risk running into
1156          * a machine check exception otherwise.
1157          * Do this by reading the register back to commit the
1158          * PCI write and delay an additional usec for the device
1159          * to react to the change. */
1160         ssb_read32(dev, SSB_TMSLOW);
1161         udelay(1);
1162 }
1163
1164 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1165 {
1166         u32 val;
1167
1168         ssb_device_disable(dev, core_specific_flags);
1169         ssb_write32(dev, SSB_TMSLOW,
1170                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1171                     SSB_TMSLOW_FGC | core_specific_flags);
1172         ssb_flush_tmslow(dev);
1173
1174         /* Clear SERR if set. This is a hw bug workaround. */
1175         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1176                 ssb_write32(dev, SSB_TMSHIGH, 0);
1177
1178         val = ssb_read32(dev, SSB_IMSTATE);
1179         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1180                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1181                 ssb_write32(dev, SSB_IMSTATE, val);
1182         }
1183
1184         ssb_write32(dev, SSB_TMSLOW,
1185                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1186                     core_specific_flags);
1187         ssb_flush_tmslow(dev);
1188
1189         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1190                     core_specific_flags);
1191         ssb_flush_tmslow(dev);
1192 }
1193 EXPORT_SYMBOL(ssb_device_enable);
1194
1195 /* Wait for bitmask in a register to get set or cleared.
1196  * timeout is in units of ten-microseconds */
1197 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1198                          int timeout, int set)
1199 {
1200         int i;
1201         u32 val;
1202
1203         for (i = 0; i < timeout; i++) {
1204                 val = ssb_read32(dev, reg);
1205                 if (set) {
1206                         if ((val & bitmask) == bitmask)
1207                                 return 0;
1208                 } else {
1209                         if (!(val & bitmask))
1210                                 return 0;
1211                 }
1212                 udelay(10);
1213         }
1214         printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1215                             "register %04X to %s.\n",
1216                bitmask, reg, (set ? "set" : "clear"));
1217
1218         return -ETIMEDOUT;
1219 }
1220
1221 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1222 {
1223         u32 reject, val;
1224
1225         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1226                 return;
1227
1228         reject = ssb_tmslow_reject_bitmask(dev);
1229
1230         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1231                 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1232                 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1233                 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1234
1235                 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1236                         val = ssb_read32(dev, SSB_IMSTATE);
1237                         val |= SSB_IMSTATE_REJECT;
1238                         ssb_write32(dev, SSB_IMSTATE, val);
1239                         ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1240                                       0);
1241                 }
1242
1243                 ssb_write32(dev, SSB_TMSLOW,
1244                         SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1245                         reject | SSB_TMSLOW_RESET |
1246                         core_specific_flags);
1247                 ssb_flush_tmslow(dev);
1248
1249                 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1250                         val = ssb_read32(dev, SSB_IMSTATE);
1251                         val &= ~SSB_IMSTATE_REJECT;
1252                         ssb_write32(dev, SSB_IMSTATE, val);
1253                 }
1254         }
1255
1256         ssb_write32(dev, SSB_TMSLOW,
1257                     reject | SSB_TMSLOW_RESET |
1258                     core_specific_flags);
1259         ssb_flush_tmslow(dev);
1260 }
1261 EXPORT_SYMBOL(ssb_device_disable);
1262
1263 u32 ssb_dma_translation(struct ssb_device *dev)
1264 {
1265         switch (dev->bus->bustype) {
1266         case SSB_BUSTYPE_SSB:
1267                 return 0;
1268         case SSB_BUSTYPE_PCI:
1269                 return SSB_PCI_DMA;
1270         default:
1271                 __ssb_dma_not_implemented(dev);
1272         }
1273         return 0;
1274 }
1275 EXPORT_SYMBOL(ssb_dma_translation);
1276
1277 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1278 {
1279         struct ssb_chipcommon *cc;
1280         int err = 0;
1281
1282         /* On buses where more than one core may be working
1283          * at a time, we must not powerdown stuff if there are
1284          * still cores that may want to run. */
1285         if (bus->bustype == SSB_BUSTYPE_SSB)
1286                 goto out;
1287
1288         cc = &bus->chipco;
1289
1290         if (!cc->dev)
1291                 goto out;
1292         if (cc->dev->id.revision < 5)
1293                 goto out;
1294
1295         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1296         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1297         if (err)
1298                 goto error;
1299 out:
1300 #ifdef CONFIG_SSB_DEBUG
1301         bus->powered_up = 0;
1302 #endif
1303         return err;
1304 error:
1305         ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1306         goto out;
1307 }
1308 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1309
1310 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1311 {
1312         struct ssb_chipcommon *cc;
1313         int err;
1314         enum ssb_clkmode mode;
1315
1316         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1317         if (err)
1318                 goto error;
1319         cc = &bus->chipco;
1320         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1321         ssb_chipco_set_clockmode(cc, mode);
1322
1323 #ifdef CONFIG_SSB_DEBUG
1324         bus->powered_up = 1;
1325 #endif
1326         return 0;
1327 error:
1328         ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1329         return err;
1330 }
1331 EXPORT_SYMBOL(ssb_bus_powerup);
1332
1333 u32 ssb_admatch_base(u32 adm)
1334 {
1335         u32 base = 0;
1336
1337         switch (adm & SSB_ADM_TYPE) {
1338         case SSB_ADM_TYPE0:
1339                 base = (adm & SSB_ADM_BASE0);
1340                 break;
1341         case SSB_ADM_TYPE1:
1342                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1343                 base = (adm & SSB_ADM_BASE1);
1344                 break;
1345         case SSB_ADM_TYPE2:
1346                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1347                 base = (adm & SSB_ADM_BASE2);
1348                 break;
1349         default:
1350                 SSB_WARN_ON(1);
1351         }
1352
1353         return base;
1354 }
1355 EXPORT_SYMBOL(ssb_admatch_base);
1356
1357 u32 ssb_admatch_size(u32 adm)
1358 {
1359         u32 size = 0;
1360
1361         switch (adm & SSB_ADM_TYPE) {
1362         case SSB_ADM_TYPE0:
1363                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1364                 break;
1365         case SSB_ADM_TYPE1:
1366                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1367                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1368                 break;
1369         case SSB_ADM_TYPE2:
1370                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1371                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1372                 break;
1373         default:
1374                 SSB_WARN_ON(1);
1375         }
1376         size = (1 << (size + 1));
1377
1378         return size;
1379 }
1380 EXPORT_SYMBOL(ssb_admatch_size);
1381
1382 static int __init ssb_modinit(void)
1383 {
1384         int err;
1385
1386         /* See the comment at the ssb_is_early_boot definition */
1387         ssb_is_early_boot = 0;
1388         err = bus_register(&ssb_bustype);
1389         if (err)
1390                 return err;
1391
1392         /* Maybe we already registered some buses at early boot.
1393          * Check for this and attach them
1394          */
1395         ssb_buses_lock();
1396         err = ssb_attach_queued_buses();
1397         ssb_buses_unlock();
1398         if (err) {
1399                 bus_unregister(&ssb_bustype);
1400                 goto out;
1401         }
1402
1403         err = b43_pci_ssb_bridge_init();
1404         if (err) {
1405                 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1406                            "initialization failed\n");
1407                 /* don't fail SSB init because of this */
1408                 err = 0;
1409         }
1410         err = ssb_gige_init();
1411         if (err) {
1412                 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1413                            "driver initialization failed\n");
1414                 /* don't fail SSB init because of this */
1415                 err = 0;
1416         }
1417 out:
1418         return err;
1419 }
1420 /* ssb must be initialized after PCI but before the ssb drivers.
1421  * That means we must use some initcall between subsys_initcall
1422  * and device_initcall. */
1423 fs_initcall(ssb_modinit);
1424
1425 static void __exit ssb_modexit(void)
1426 {
1427         ssb_gige_exit();
1428         b43_pci_ssb_bridge_exit();
1429         bus_unregister(&ssb_bustype);
1430 }
1431 module_exit(ssb_modexit)