3e58db7ef6088e50f41a22be76d421c425fd0dc9
[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
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                         break;
475                 }
476
477                 sdev->dev = dev;
478                 err = device_register(dev);
479                 if (err) {
480                         ssb_printk(KERN_ERR PFX
481                                    "Could not register %s\n",
482                                    dev->bus_id);
483                         /* Set dev to NULL to not unregister
484                          * dev on error unwinding. */
485                         sdev->dev = NULL;
486                         kfree(devwrap);
487                         goto error;
488                 }
489                 dev_idx++;
490         }
491
492         return 0;
493 error:
494         /* Unwind the already registered devices. */
495         ssb_devices_unregister(bus);
496         return err;
497 }
498
499 /* Needs ssb_buses_lock() */
500 static int ssb_attach_queued_buses(void)
501 {
502         struct ssb_bus *bus, *n;
503         int err = 0;
504         int drop_them_all = 0;
505
506         list_for_each_entry_safe(bus, n, &attach_queue, list) {
507                 if (drop_them_all) {
508                         list_del(&bus->list);
509                         continue;
510                 }
511                 /* Can't init the PCIcore in ssb_bus_register(), as that
512                  * is too early in boot for embedded systems
513                  * (no udelay() available). So do it here in attach stage.
514                  */
515                 err = ssb_bus_powerup(bus, 0);
516                 if (err)
517                         goto error;
518                 ssb_pcicore_init(&bus->pcicore);
519                 ssb_bus_may_powerdown(bus);
520
521                 err = ssb_devices_register(bus);
522 error:
523                 if (err) {
524                         drop_them_all = 1;
525                         list_del(&bus->list);
526                         continue;
527                 }
528                 list_move_tail(&bus->list, &buses);
529         }
530
531         return err;
532 }
533
534 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
535 {
536         struct ssb_bus *bus = dev->bus;
537
538         offset += dev->core_index * SSB_CORE_SIZE;
539         return readb(bus->mmio + offset);
540 }
541
542 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
543 {
544         struct ssb_bus *bus = dev->bus;
545
546         offset += dev->core_index * SSB_CORE_SIZE;
547         return readw(bus->mmio + offset);
548 }
549
550 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
551 {
552         struct ssb_bus *bus = dev->bus;
553
554         offset += dev->core_index * SSB_CORE_SIZE;
555         return readl(bus->mmio + offset);
556 }
557
558 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
559 {
560         struct ssb_bus *bus = dev->bus;
561
562         offset += dev->core_index * SSB_CORE_SIZE;
563         writeb(value, bus->mmio + offset);
564 }
565
566 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
567 {
568         struct ssb_bus *bus = dev->bus;
569
570         offset += dev->core_index * SSB_CORE_SIZE;
571         writew(value, bus->mmio + offset);
572 }
573
574 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
575 {
576         struct ssb_bus *bus = dev->bus;
577
578         offset += dev->core_index * SSB_CORE_SIZE;
579         writel(value, bus->mmio + offset);
580 }
581
582 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
583 static const struct ssb_bus_ops ssb_ssb_ops = {
584         .read8          = ssb_ssb_read8,
585         .read16         = ssb_ssb_read16,
586         .read32         = ssb_ssb_read32,
587         .write8         = ssb_ssb_write8,
588         .write16        = ssb_ssb_write16,
589         .write32        = ssb_ssb_write32,
590 };
591
592 static int ssb_fetch_invariants(struct ssb_bus *bus,
593                                 ssb_invariants_func_t get_invariants)
594 {
595         struct ssb_init_invariants iv;
596         int err;
597
598         memset(&iv, 0, sizeof(iv));
599         err = get_invariants(bus, &iv);
600         if (err)
601                 goto out;
602         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
603         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
604         bus->has_cardbus_slot = iv.has_cardbus_slot;
605 out:
606         return err;
607 }
608
609 static int ssb_bus_register(struct ssb_bus *bus,
610                             ssb_invariants_func_t get_invariants,
611                             unsigned long baseaddr)
612 {
613         int err;
614
615         spin_lock_init(&bus->bar_lock);
616         INIT_LIST_HEAD(&bus->list);
617 #ifdef CONFIG_SSB_EMBEDDED
618         spin_lock_init(&bus->gpio_lock);
619 #endif
620
621         /* Powerup the bus */
622         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
623         if (err)
624                 goto out;
625         ssb_buses_lock();
626         bus->busnumber = next_busnumber;
627         /* Scan for devices (cores) */
628         err = ssb_bus_scan(bus, baseaddr);
629         if (err)
630                 goto err_disable_xtal;
631
632         /* Init PCI-host device (if any) */
633         err = ssb_pci_init(bus);
634         if (err)
635                 goto err_unmap;
636         /* Init PCMCIA-host device (if any) */
637         err = ssb_pcmcia_init(bus);
638         if (err)
639                 goto err_pci_exit;
640
641         /* Initialize basic system devices (if available) */
642         err = ssb_bus_powerup(bus, 0);
643         if (err)
644                 goto err_pcmcia_exit;
645         ssb_chipcommon_init(&bus->chipco);
646         ssb_mipscore_init(&bus->mipscore);
647         err = ssb_fetch_invariants(bus, get_invariants);
648         if (err) {
649                 ssb_bus_may_powerdown(bus);
650                 goto err_pcmcia_exit;
651         }
652         ssb_bus_may_powerdown(bus);
653
654         /* Queue it for attach.
655          * See the comment at the ssb_is_early_boot definition. */
656         list_add_tail(&bus->list, &attach_queue);
657         if (!ssb_is_early_boot) {
658                 /* This is not early boot, so we must attach the bus now */
659                 err = ssb_attach_queued_buses();
660                 if (err)
661                         goto err_dequeue;
662         }
663         next_busnumber++;
664         ssb_buses_unlock();
665
666 out:
667         return err;
668
669 err_dequeue:
670         list_del(&bus->list);
671 err_pcmcia_exit:
672         ssb_pcmcia_exit(bus);
673 err_pci_exit:
674         ssb_pci_exit(bus);
675 err_unmap:
676         ssb_iounmap(bus);
677 err_disable_xtal:
678         ssb_buses_unlock();
679         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
680         return err;
681 }
682
683 #ifdef CONFIG_SSB_PCIHOST
684 int ssb_bus_pcibus_register(struct ssb_bus *bus,
685                             struct pci_dev *host_pci)
686 {
687         int err;
688
689         bus->bustype = SSB_BUSTYPE_PCI;
690         bus->host_pci = host_pci;
691         bus->ops = &ssb_pci_ops;
692
693         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
694         if (!err) {
695                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
696                            "PCI device %s\n", host_pci->dev.bus_id);
697         }
698
699         return err;
700 }
701 EXPORT_SYMBOL(ssb_bus_pcibus_register);
702 #endif /* CONFIG_SSB_PCIHOST */
703
704 #ifdef CONFIG_SSB_PCMCIAHOST
705 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
706                                struct pcmcia_device *pcmcia_dev,
707                                unsigned long baseaddr)
708 {
709         int err;
710
711         bus->bustype = SSB_BUSTYPE_PCMCIA;
712         bus->host_pcmcia = pcmcia_dev;
713         bus->ops = &ssb_pcmcia_ops;
714
715         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
716         if (!err) {
717                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
718                            "PCMCIA device %s\n", pcmcia_dev->devname);
719         }
720
721         return err;
722 }
723 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
724 #endif /* CONFIG_SSB_PCMCIAHOST */
725
726 int ssb_bus_ssbbus_register(struct ssb_bus *bus,
727                             unsigned long baseaddr,
728                             ssb_invariants_func_t get_invariants)
729 {
730         int err;
731
732         bus->bustype = SSB_BUSTYPE_SSB;
733         bus->ops = &ssb_ssb_ops;
734
735         err = ssb_bus_register(bus, get_invariants, baseaddr);
736         if (!err) {
737                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
738                            "address 0x%08lX\n", baseaddr);
739         }
740
741         return err;
742 }
743
744 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
745 {
746         drv->drv.name = drv->name;
747         drv->drv.bus = &ssb_bustype;
748         drv->drv.owner = owner;
749
750         return driver_register(&drv->drv);
751 }
752 EXPORT_SYMBOL(__ssb_driver_register);
753
754 void ssb_driver_unregister(struct ssb_driver *drv)
755 {
756         driver_unregister(&drv->drv);
757 }
758 EXPORT_SYMBOL(ssb_driver_unregister);
759
760 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
761 {
762         struct ssb_bus *bus = dev->bus;
763         struct ssb_device *ent;
764         int i;
765
766         for (i = 0; i < bus->nr_devices; i++) {
767                 ent = &(bus->devices[i]);
768                 if (ent->id.vendor != dev->id.vendor)
769                         continue;
770                 if (ent->id.coreid != dev->id.coreid)
771                         continue;
772
773                 ent->devtypedata = data;
774         }
775 }
776 EXPORT_SYMBOL(ssb_set_devtypedata);
777
778 static u32 clkfactor_f6_resolve(u32 v)
779 {
780         /* map the magic values */
781         switch (v) {
782         case SSB_CHIPCO_CLK_F6_2:
783                 return 2;
784         case SSB_CHIPCO_CLK_F6_3:
785                 return 3;
786         case SSB_CHIPCO_CLK_F6_4:
787                 return 4;
788         case SSB_CHIPCO_CLK_F6_5:
789                 return 5;
790         case SSB_CHIPCO_CLK_F6_6:
791                 return 6;
792         case SSB_CHIPCO_CLK_F6_7:
793                 return 7;
794         }
795         return 0;
796 }
797
798 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
799 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
800 {
801         u32 n1, n2, clock, m1, m2, m3, mc;
802
803         n1 = (n & SSB_CHIPCO_CLK_N1);
804         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
805
806         switch (plltype) {
807         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
808                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
809                         return SSB_CHIPCO_CLK_T6_M0;
810                 return SSB_CHIPCO_CLK_T6_M1;
811         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
812         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
813         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
814         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
815                 n1 = clkfactor_f6_resolve(n1);
816                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
817                 break;
818         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
819                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
820                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
821                 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
822                 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
823                 break;
824         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
825                 return 100000000;
826         default:
827                 SSB_WARN_ON(1);
828         }
829
830         switch (plltype) {
831         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
832         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
833                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
834                 break;
835         default:
836                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
837         }
838         if (!clock)
839                 return 0;
840
841         m1 = (m & SSB_CHIPCO_CLK_M1);
842         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
843         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
844         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
845
846         switch (plltype) {
847         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
848         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
849         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
850         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
851                 m1 = clkfactor_f6_resolve(m1);
852                 if ((plltype == SSB_PLLTYPE_1) ||
853                     (plltype == SSB_PLLTYPE_3))
854                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
855                 else
856                         m2 = clkfactor_f6_resolve(m2);
857                 m3 = clkfactor_f6_resolve(m3);
858
859                 switch (mc) {
860                 case SSB_CHIPCO_CLK_MC_BYPASS:
861                         return clock;
862                 case SSB_CHIPCO_CLK_MC_M1:
863                         return (clock / m1);
864                 case SSB_CHIPCO_CLK_MC_M1M2:
865                         return (clock / (m1 * m2));
866                 case SSB_CHIPCO_CLK_MC_M1M2M3:
867                         return (clock / (m1 * m2 * m3));
868                 case SSB_CHIPCO_CLK_MC_M1M3:
869                         return (clock / (m1 * m3));
870                 }
871                 return 0;
872         case SSB_PLLTYPE_2:
873                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
874                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
875                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
876                 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
877                 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
878                 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
879
880                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
881                         clock /= m1;
882                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
883                         clock /= m2;
884                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
885                         clock /= m3;
886                 return clock;
887         default:
888                 SSB_WARN_ON(1);
889         }
890         return 0;
891 }
892
893 /* Get the current speed the backplane is running at */
894 u32 ssb_clockspeed(struct ssb_bus *bus)
895 {
896         u32 rate;
897         u32 plltype;
898         u32 clkctl_n, clkctl_m;
899
900         if (ssb_extif_available(&bus->extif))
901                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
902                                            &clkctl_n, &clkctl_m);
903         else if (bus->chipco.dev)
904                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
905                                             &clkctl_n, &clkctl_m);
906         else
907                 return 0;
908
909         if (bus->chip_id == 0x5365) {
910                 rate = 100000000;
911         } else {
912                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
913                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
914                         rate /= 2;
915         }
916
917         return rate;
918 }
919 EXPORT_SYMBOL(ssb_clockspeed);
920
921 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
922 {
923         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
924
925         /* The REJECT bit changed position in TMSLOW between
926          * Backplane revisions. */
927         switch (rev) {
928         case SSB_IDLOW_SSBREV_22:
929                 return SSB_TMSLOW_REJECT_22;
930         case SSB_IDLOW_SSBREV_23:
931                 return SSB_TMSLOW_REJECT_23;
932         case SSB_IDLOW_SSBREV_24:     /* TODO - find the proper REJECT bits */
933         case SSB_IDLOW_SSBREV_25:     /* same here */
934         case SSB_IDLOW_SSBREV_26:     /* same here */
935         case SSB_IDLOW_SSBREV_27:     /* same here */
936                 return SSB_TMSLOW_REJECT_23;    /* this is a guess */
937         default:
938                 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
939                 WARN_ON(1);
940         }
941         return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
942 }
943
944 int ssb_device_is_enabled(struct ssb_device *dev)
945 {
946         u32 val;
947         u32 reject;
948
949         reject = ssb_tmslow_reject_bitmask(dev);
950         val = ssb_read32(dev, SSB_TMSLOW);
951         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
952
953         return (val == SSB_TMSLOW_CLOCK);
954 }
955 EXPORT_SYMBOL(ssb_device_is_enabled);
956
957 static void ssb_flush_tmslow(struct ssb_device *dev)
958 {
959         /* Make _really_ sure the device has finished the TMSLOW
960          * register write transaction, as we risk running into
961          * a machine check exception otherwise.
962          * Do this by reading the register back to commit the
963          * PCI write and delay an additional usec for the device
964          * to react to the change. */
965         ssb_read32(dev, SSB_TMSLOW);
966         udelay(1);
967 }
968
969 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
970 {
971         u32 val;
972
973         ssb_device_disable(dev, core_specific_flags);
974         ssb_write32(dev, SSB_TMSLOW,
975                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
976                     SSB_TMSLOW_FGC | core_specific_flags);
977         ssb_flush_tmslow(dev);
978
979         /* Clear SERR if set. This is a hw bug workaround. */
980         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
981                 ssb_write32(dev, SSB_TMSHIGH, 0);
982
983         val = ssb_read32(dev, SSB_IMSTATE);
984         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
985                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
986                 ssb_write32(dev, SSB_IMSTATE, val);
987         }
988
989         ssb_write32(dev, SSB_TMSLOW,
990                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
991                     core_specific_flags);
992         ssb_flush_tmslow(dev);
993
994         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
995                     core_specific_flags);
996         ssb_flush_tmslow(dev);
997 }
998 EXPORT_SYMBOL(ssb_device_enable);
999
1000 /* Wait for a bit in a register to get set or unset.
1001  * timeout is in units of ten-microseconds */
1002 static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask,
1003                         int timeout, int set)
1004 {
1005         int i;
1006         u32 val;
1007
1008         for (i = 0; i < timeout; i++) {
1009                 val = ssb_read32(dev, reg);
1010                 if (set) {
1011                         if (val & bitmask)
1012                                 return 0;
1013                 } else {
1014                         if (!(val & bitmask))
1015                                 return 0;
1016                 }
1017                 udelay(10);
1018         }
1019         printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1020                             "register %04X to %s.\n",
1021                bitmask, reg, (set ? "set" : "clear"));
1022
1023         return -ETIMEDOUT;
1024 }
1025
1026 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1027 {
1028         u32 reject;
1029
1030         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1031                 return;
1032
1033         reject = ssb_tmslow_reject_bitmask(dev);
1034         ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1035         ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1);
1036         ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1037         ssb_write32(dev, SSB_TMSLOW,
1038                     SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1039                     reject | SSB_TMSLOW_RESET |
1040                     core_specific_flags);
1041         ssb_flush_tmslow(dev);
1042
1043         ssb_write32(dev, SSB_TMSLOW,
1044                     reject | SSB_TMSLOW_RESET |
1045                     core_specific_flags);
1046         ssb_flush_tmslow(dev);
1047 }
1048 EXPORT_SYMBOL(ssb_device_disable);
1049
1050 u32 ssb_dma_translation(struct ssb_device *dev)
1051 {
1052         switch (dev->bus->bustype) {
1053         case SSB_BUSTYPE_SSB:
1054         case SSB_BUSTYPE_PCMCIA:
1055                 return 0;
1056         case SSB_BUSTYPE_PCI:
1057                 return SSB_PCI_DMA;
1058         }
1059         return 0;
1060 }
1061 EXPORT_SYMBOL(ssb_dma_translation);
1062
1063 int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask)
1064 {
1065         struct device *dev = ssb_dev->dev;
1066
1067 #ifdef CONFIG_SSB_PCIHOST
1068         if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI &&
1069             !dma_supported(dev, mask))
1070                 return -EIO;
1071 #endif
1072         dev->coherent_dma_mask = mask;
1073         dev->dma_mask = &dev->coherent_dma_mask;
1074
1075         return 0;
1076 }
1077 EXPORT_SYMBOL(ssb_dma_set_mask);
1078
1079 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1080 {
1081         struct ssb_chipcommon *cc;
1082         int err = 0;
1083
1084         /* On buses where more than one core may be working
1085          * at a time, we must not powerdown stuff if there are
1086          * still cores that may want to run. */
1087         if (bus->bustype == SSB_BUSTYPE_SSB)
1088                 goto out;
1089
1090         cc = &bus->chipco;
1091         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1092         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1093         if (err)
1094                 goto error;
1095 out:
1096 #ifdef CONFIG_SSB_DEBUG
1097         bus->powered_up = 0;
1098 #endif
1099         return err;
1100 error:
1101         ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1102         goto out;
1103 }
1104 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1105
1106 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1107 {
1108         struct ssb_chipcommon *cc;
1109         int err;
1110         enum ssb_clkmode mode;
1111
1112         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1113         if (err)
1114                 goto error;
1115         cc = &bus->chipco;
1116         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1117         ssb_chipco_set_clockmode(cc, mode);
1118
1119 #ifdef CONFIG_SSB_DEBUG
1120         bus->powered_up = 1;
1121 #endif
1122         return 0;
1123 error:
1124         ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1125         return err;
1126 }
1127 EXPORT_SYMBOL(ssb_bus_powerup);
1128
1129 u32 ssb_admatch_base(u32 adm)
1130 {
1131         u32 base = 0;
1132
1133         switch (adm & SSB_ADM_TYPE) {
1134         case SSB_ADM_TYPE0:
1135                 base = (adm & SSB_ADM_BASE0);
1136                 break;
1137         case SSB_ADM_TYPE1:
1138                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1139                 base = (adm & SSB_ADM_BASE1);
1140                 break;
1141         case SSB_ADM_TYPE2:
1142                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1143                 base = (adm & SSB_ADM_BASE2);
1144                 break;
1145         default:
1146                 SSB_WARN_ON(1);
1147         }
1148
1149         return base;
1150 }
1151 EXPORT_SYMBOL(ssb_admatch_base);
1152
1153 u32 ssb_admatch_size(u32 adm)
1154 {
1155         u32 size = 0;
1156
1157         switch (adm & SSB_ADM_TYPE) {
1158         case SSB_ADM_TYPE0:
1159                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1160                 break;
1161         case SSB_ADM_TYPE1:
1162                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1163                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1164                 break;
1165         case SSB_ADM_TYPE2:
1166                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1167                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1168                 break;
1169         default:
1170                 SSB_WARN_ON(1);
1171         }
1172         size = (1 << (size + 1));
1173
1174         return size;
1175 }
1176 EXPORT_SYMBOL(ssb_admatch_size);
1177
1178 static int __init ssb_modinit(void)
1179 {
1180         int err;
1181
1182         /* See the comment at the ssb_is_early_boot definition */
1183         ssb_is_early_boot = 0;
1184         err = bus_register(&ssb_bustype);
1185         if (err)
1186                 return err;
1187
1188         /* Maybe we already registered some buses at early boot.
1189          * Check for this and attach them
1190          */
1191         ssb_buses_lock();
1192         err = ssb_attach_queued_buses();
1193         ssb_buses_unlock();
1194         if (err)
1195                 bus_unregister(&ssb_bustype);
1196
1197         err = b43_pci_ssb_bridge_init();
1198         if (err) {
1199                 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1200                            "initialization failed\n");
1201                 /* don't fail SSB init because of this */
1202                 err = 0;
1203         }
1204         err = ssb_gige_init();
1205         if (err) {
1206                 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1207                            "driver initialization failed\n");
1208                 /* don't fail SSB init because of this */
1209                 err = 0;
1210         }
1211
1212         return err;
1213 }
1214 /* ssb must be initialized after PCI but before the ssb drivers.
1215  * That means we must use some initcall between subsys_initcall
1216  * and device_initcall. */
1217 fs_initcall(ssb_modinit);
1218
1219 static void __exit ssb_modexit(void)
1220 {
1221         ssb_gige_exit();
1222         b43_pci_ssb_bridge_exit();
1223         bus_unregister(&ssb_bustype);
1224 }
1225 module_exit(ssb_modexit)