Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[sfrench/cifs-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/dma-mapping.h>
18 #include <linux/pci.h>
19
20 #include <pcmcia/cs_types.h>
21 #include <pcmcia/cs.h>
22 #include <pcmcia/cistpl.h>
23 #include <pcmcia/ds.h>
24
25
26 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
27 MODULE_LICENSE("GPL");
28
29
30 /* Temporary list of yet-to-be-attached buses */
31 static LIST_HEAD(attach_queue);
32 /* List if running buses */
33 static LIST_HEAD(buses);
34 /* Software ID counter */
35 static unsigned int next_busnumber;
36 /* buses_mutes locks the two buslists and the next_busnumber.
37  * Don't lock this directly, but use ssb_buses_[un]lock() below. */
38 static DEFINE_MUTEX(buses_mutex);
39
40 /* There are differences in the codeflow, if the bus is
41  * initialized from early boot, as various needed services
42  * are not available early. This is a mechanism to delay
43  * these initializations to after early boot has finished.
44  * It's also used to avoid mutex locking, as that's not
45  * available and needed early. */
46 static bool ssb_is_early_boot = 1;
47
48 static void ssb_buses_lock(void);
49 static void ssb_buses_unlock(void);
50
51
52 #ifdef CONFIG_SSB_PCIHOST
53 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
54 {
55         struct ssb_bus *bus;
56
57         ssb_buses_lock();
58         list_for_each_entry(bus, &buses, list) {
59                 if (bus->bustype == SSB_BUSTYPE_PCI &&
60                     bus->host_pci == pdev)
61                         goto found;
62         }
63         bus = NULL;
64 found:
65         ssb_buses_unlock();
66
67         return bus;
68 }
69 #endif /* CONFIG_SSB_PCIHOST */
70
71 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
72 {
73         if (dev)
74                 get_device(dev->dev);
75         return dev;
76 }
77
78 static void ssb_device_put(struct ssb_device *dev)
79 {
80         if (dev)
81                 put_device(dev->dev);
82 }
83
84 static int ssb_bus_resume(struct ssb_bus *bus)
85 {
86         int err;
87
88         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
89         err = ssb_pcmcia_init(bus);
90         if (err) {
91                 /* No need to disable XTAL, as we don't have one on PCMCIA. */
92                 return err;
93         }
94         ssb_chipco_resume(&bus->chipco);
95
96         return 0;
97 }
98
99 static int ssb_device_resume(struct device *dev)
100 {
101         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
102         struct ssb_driver *ssb_drv;
103         struct ssb_bus *bus;
104         int err = 0;
105
106         bus = ssb_dev->bus;
107         if (bus->suspend_cnt == bus->nr_devices) {
108                 err = ssb_bus_resume(bus);
109                 if (err)
110                         return err;
111         }
112         bus->suspend_cnt--;
113         if (dev->driver) {
114                 ssb_drv = drv_to_ssb_drv(dev->driver);
115                 if (ssb_drv && ssb_drv->resume)
116                         err = ssb_drv->resume(ssb_dev);
117                 if (err)
118                         goto out;
119         }
120 out:
121         return err;
122 }
123
124 static void ssb_bus_suspend(struct ssb_bus *bus, pm_message_t state)
125 {
126         ssb_chipco_suspend(&bus->chipco, state);
127         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
128
129         /* Reset HW state information in memory, so that HW is
130          * completely reinitialized on resume. */
131         bus->mapped_device = NULL;
132 #ifdef CONFIG_SSB_DRIVER_PCICORE
133         bus->pcicore.setup_done = 0;
134 #endif
135 #ifdef CONFIG_SSB_DEBUG
136         bus->powered_up = 0;
137 #endif
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         struct ssb_bus *bus;
145         int err = 0;
146
147         if (dev->driver) {
148                 ssb_drv = drv_to_ssb_drv(dev->driver);
149                 if (ssb_drv && ssb_drv->suspend)
150                         err = ssb_drv->suspend(ssb_dev, state);
151                 if (err)
152                         goto out;
153         }
154
155         bus = ssb_dev->bus;
156         bus->suspend_cnt++;
157         if (bus->suspend_cnt == bus->nr_devices) {
158                 /* All devices suspended. Shutdown the bus. */
159                 ssb_bus_suspend(bus, state);
160         }
161
162 out:
163         return err;
164 }
165
166 #ifdef CONFIG_SSB_PCIHOST
167 int ssb_devices_freeze(struct ssb_bus *bus)
168 {
169         struct ssb_device *dev;
170         struct ssb_driver *drv;
171         int err = 0;
172         int i;
173         pm_message_t state = PMSG_FREEZE;
174
175         /* First check that we are capable to freeze all devices. */
176         for (i = 0; i < bus->nr_devices; i++) {
177                 dev = &(bus->devices[i]);
178                 if (!dev->dev ||
179                     !dev->dev->driver ||
180                     !device_is_registered(dev->dev))
181                         continue;
182                 drv = drv_to_ssb_drv(dev->dev->driver);
183                 if (!drv)
184                         continue;
185                 if (!drv->suspend) {
186                         /* Nope, can't suspend this one. */
187                         return -EOPNOTSUPP;
188                 }
189         }
190         /* Now suspend all devices */
191         for (i = 0; i < bus->nr_devices; i++) {
192                 dev = &(bus->devices[i]);
193                 if (!dev->dev ||
194                     !dev->dev->driver ||
195                     !device_is_registered(dev->dev))
196                         continue;
197                 drv = drv_to_ssb_drv(dev->dev->driver);
198                 if (!drv)
199                         continue;
200                 err = drv->suspend(dev, state);
201                 if (err) {
202                         ssb_printk(KERN_ERR PFX "Failed to freeze device %s\n",
203                                    dev->dev->bus_id);
204                         goto err_unwind;
205                 }
206         }
207
208         return 0;
209 err_unwind:
210         for (i--; i >= 0; i--) {
211                 dev = &(bus->devices[i]);
212                 if (!dev->dev ||
213                     !dev->dev->driver ||
214                     !device_is_registered(dev->dev))
215                         continue;
216                 drv = drv_to_ssb_drv(dev->dev->driver);
217                 if (!drv)
218                         continue;
219                 if (drv->resume)
220                         drv->resume(dev);
221         }
222         return err;
223 }
224
225 int ssb_devices_thaw(struct ssb_bus *bus)
226 {
227         struct ssb_device *dev;
228         struct ssb_driver *drv;
229         int err;
230         int i;
231
232         for (i = 0; i < bus->nr_devices; i++) {
233                 dev = &(bus->devices[i]);
234                 if (!dev->dev ||
235                     !dev->dev->driver ||
236                     !device_is_registered(dev->dev))
237                         continue;
238                 drv = drv_to_ssb_drv(dev->dev->driver);
239                 if (!drv)
240                         continue;
241                 if (SSB_WARN_ON(!drv->resume))
242                         continue;
243                 err = drv->resume(dev);
244                 if (err) {
245                         ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
246                                    dev->dev->bus_id);
247                 }
248         }
249
250         return 0;
251 }
252 #endif /* CONFIG_SSB_PCIHOST */
253
254 static void ssb_device_shutdown(struct device *dev)
255 {
256         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
257         struct ssb_driver *ssb_drv;
258
259         if (!dev->driver)
260                 return;
261         ssb_drv = drv_to_ssb_drv(dev->driver);
262         if (ssb_drv && ssb_drv->shutdown)
263                 ssb_drv->shutdown(ssb_dev);
264 }
265
266 static int ssb_device_remove(struct device *dev)
267 {
268         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
269         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
270
271         if (ssb_drv && ssb_drv->remove)
272                 ssb_drv->remove(ssb_dev);
273         ssb_device_put(ssb_dev);
274
275         return 0;
276 }
277
278 static int ssb_device_probe(struct device *dev)
279 {
280         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
281         struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
282         int err = 0;
283
284         ssb_device_get(ssb_dev);
285         if (ssb_drv && ssb_drv->probe)
286                 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
287         if (err)
288                 ssb_device_put(ssb_dev);
289
290         return err;
291 }
292
293 static int ssb_match_devid(const struct ssb_device_id *tabid,
294                            const struct ssb_device_id *devid)
295 {
296         if ((tabid->vendor != devid->vendor) &&
297             tabid->vendor != SSB_ANY_VENDOR)
298                 return 0;
299         if ((tabid->coreid != devid->coreid) &&
300             tabid->coreid != SSB_ANY_ID)
301                 return 0;
302         if ((tabid->revision != devid->revision) &&
303             tabid->revision != SSB_ANY_REV)
304                 return 0;
305         return 1;
306 }
307
308 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
309 {
310         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
311         struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
312         const struct ssb_device_id *id;
313
314         for (id = ssb_drv->id_table;
315              id->vendor || id->coreid || id->revision;
316              id++) {
317                 if (ssb_match_devid(id, &ssb_dev->id))
318                         return 1; /* found */
319         }
320
321         return 0;
322 }
323
324 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
325 {
326         struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
327
328         if (!dev)
329                 return -ENODEV;
330
331         return add_uevent_var(env,
332                              "MODALIAS=ssb:v%04Xid%04Xrev%02X",
333                              ssb_dev->id.vendor, ssb_dev->id.coreid,
334                              ssb_dev->id.revision);
335 }
336
337 static struct bus_type ssb_bustype = {
338         .name           = "ssb",
339         .match          = ssb_bus_match,
340         .probe          = ssb_device_probe,
341         .remove         = ssb_device_remove,
342         .shutdown       = ssb_device_shutdown,
343         .suspend        = ssb_device_suspend,
344         .resume         = ssb_device_resume,
345         .uevent         = ssb_device_uevent,
346 };
347
348 static void ssb_buses_lock(void)
349 {
350         /* See the comment at the ssb_is_early_boot definition */
351         if (!ssb_is_early_boot)
352                 mutex_lock(&buses_mutex);
353 }
354
355 static void ssb_buses_unlock(void)
356 {
357         /* See the comment at the ssb_is_early_boot definition */
358         if (!ssb_is_early_boot)
359                 mutex_unlock(&buses_mutex);
360 }
361
362 static void ssb_devices_unregister(struct ssb_bus *bus)
363 {
364         struct ssb_device *sdev;
365         int i;
366
367         for (i = bus->nr_devices - 1; i >= 0; i--) {
368                 sdev = &(bus->devices[i]);
369                 if (sdev->dev)
370                         device_unregister(sdev->dev);
371         }
372 }
373
374 void ssb_bus_unregister(struct ssb_bus *bus)
375 {
376         ssb_buses_lock();
377         ssb_devices_unregister(bus);
378         list_del(&bus->list);
379         ssb_buses_unlock();
380
381         /* ssb_pcmcia_exit(bus); */
382         ssb_pci_exit(bus);
383         ssb_iounmap(bus);
384 }
385 EXPORT_SYMBOL(ssb_bus_unregister);
386
387 static void ssb_release_dev(struct device *dev)
388 {
389         struct __ssb_dev_wrapper *devwrap;
390
391         devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
392         kfree(devwrap);
393 }
394
395 static int ssb_devices_register(struct ssb_bus *bus)
396 {
397         struct ssb_device *sdev;
398         struct device *dev;
399         struct __ssb_dev_wrapper *devwrap;
400         int i, err = 0;
401         int dev_idx = 0;
402
403         for (i = 0; i < bus->nr_devices; i++) {
404                 sdev = &(bus->devices[i]);
405
406                 /* We don't register SSB-system devices to the kernel,
407                  * as the drivers for them are built into SSB. */
408                 switch (sdev->id.coreid) {
409                 case SSB_DEV_CHIPCOMMON:
410                 case SSB_DEV_PCI:
411                 case SSB_DEV_PCIE:
412                 case SSB_DEV_PCMCIA:
413                 case SSB_DEV_MIPS:
414                 case SSB_DEV_MIPS_3302:
415                 case SSB_DEV_EXTIF:
416                         continue;
417                 }
418
419                 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
420                 if (!devwrap) {
421                         ssb_printk(KERN_ERR PFX
422                                    "Could not allocate device\n");
423                         err = -ENOMEM;
424                         goto error;
425                 }
426                 dev = &devwrap->dev;
427                 devwrap->sdev = sdev;
428
429                 dev->release = ssb_release_dev;
430                 dev->bus = &ssb_bustype;
431                 snprintf(dev->bus_id, sizeof(dev->bus_id),
432                          "ssb%u:%d", bus->busnumber, dev_idx);
433
434                 switch (bus->bustype) {
435                 case SSB_BUSTYPE_PCI:
436 #ifdef CONFIG_SSB_PCIHOST
437                         sdev->irq = bus->host_pci->irq;
438                         dev->parent = &bus->host_pci->dev;
439                         sdev->dma_dev = &bus->host_pci->dev;
440 #endif
441                         break;
442                 case SSB_BUSTYPE_PCMCIA:
443 #ifdef CONFIG_SSB_PCMCIAHOST
444                         sdev->irq = bus->host_pcmcia->irq.AssignedIRQ;
445                         dev->parent = &bus->host_pcmcia->dev;
446                         sdev->dma_dev = &bus->host_pcmcia->dev;
447 #endif
448                         break;
449                 case SSB_BUSTYPE_SSB:
450                         sdev->dma_dev = dev;
451                         break;
452                 }
453
454                 sdev->dev = dev;
455                 err = device_register(dev);
456                 if (err) {
457                         ssb_printk(KERN_ERR PFX
458                                    "Could not register %s\n",
459                                    dev->bus_id);
460                         /* Set dev to NULL to not unregister
461                          * dev on error unwinding. */
462                         sdev->dev = NULL;
463                         kfree(devwrap);
464                         goto error;
465                 }
466                 dev_idx++;
467         }
468
469         return 0;
470 error:
471         /* Unwind the already registered devices. */
472         ssb_devices_unregister(bus);
473         return err;
474 }
475
476 /* Needs ssb_buses_lock() */
477 static int ssb_attach_queued_buses(void)
478 {
479         struct ssb_bus *bus, *n;
480         int err = 0;
481         int drop_them_all = 0;
482
483         list_for_each_entry_safe(bus, n, &attach_queue, list) {
484                 if (drop_them_all) {
485                         list_del(&bus->list);
486                         continue;
487                 }
488                 /* Can't init the PCIcore in ssb_bus_register(), as that
489                  * is too early in boot for embedded systems
490                  * (no udelay() available). So do it here in attach stage.
491                  */
492                 err = ssb_bus_powerup(bus, 0);
493                 if (err)
494                         goto error;
495                 ssb_pcicore_init(&bus->pcicore);
496                 ssb_bus_may_powerdown(bus);
497
498                 err = ssb_devices_register(bus);
499 error:
500                 if (err) {
501                         drop_them_all = 1;
502                         list_del(&bus->list);
503                         continue;
504                 }
505                 list_move_tail(&bus->list, &buses);
506         }
507
508         return err;
509 }
510
511 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
512 {
513         struct ssb_bus *bus = dev->bus;
514
515         offset += dev->core_index * SSB_CORE_SIZE;
516         return readw(bus->mmio + offset);
517 }
518
519 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
520 {
521         struct ssb_bus *bus = dev->bus;
522
523         offset += dev->core_index * SSB_CORE_SIZE;
524         return readl(bus->mmio + offset);
525 }
526
527 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
528 {
529         struct ssb_bus *bus = dev->bus;
530
531         offset += dev->core_index * SSB_CORE_SIZE;
532         writew(value, bus->mmio + offset);
533 }
534
535 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
536 {
537         struct ssb_bus *bus = dev->bus;
538
539         offset += dev->core_index * SSB_CORE_SIZE;
540         writel(value, bus->mmio + offset);
541 }
542
543 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
544 static const struct ssb_bus_ops ssb_ssb_ops = {
545         .read16         = ssb_ssb_read16,
546         .read32         = ssb_ssb_read32,
547         .write16        = ssb_ssb_write16,
548         .write32        = ssb_ssb_write32,
549 };
550
551 static int ssb_fetch_invariants(struct ssb_bus *bus,
552                                 ssb_invariants_func_t get_invariants)
553 {
554         struct ssb_init_invariants iv;
555         int err;
556
557         memset(&iv, 0, sizeof(iv));
558         err = get_invariants(bus, &iv);
559         if (err)
560                 goto out;
561         memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
562         memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
563         bus->has_cardbus_slot = iv.has_cardbus_slot;
564 out:
565         return err;
566 }
567
568 static int ssb_bus_register(struct ssb_bus *bus,
569                             ssb_invariants_func_t get_invariants,
570                             unsigned long baseaddr)
571 {
572         int err;
573
574         spin_lock_init(&bus->bar_lock);
575         INIT_LIST_HEAD(&bus->list);
576 #ifdef CONFIG_SSB_EMBEDDED
577         spin_lock_init(&bus->gpio_lock);
578 #endif
579
580         /* Powerup the bus */
581         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
582         if (err)
583                 goto out;
584         ssb_buses_lock();
585         bus->busnumber = next_busnumber;
586         /* Scan for devices (cores) */
587         err = ssb_bus_scan(bus, baseaddr);
588         if (err)
589                 goto err_disable_xtal;
590
591         /* Init PCI-host device (if any) */
592         err = ssb_pci_init(bus);
593         if (err)
594                 goto err_unmap;
595         /* Init PCMCIA-host device (if any) */
596         err = ssb_pcmcia_init(bus);
597         if (err)
598                 goto err_pci_exit;
599
600         /* Initialize basic system devices (if available) */
601         err = ssb_bus_powerup(bus, 0);
602         if (err)
603                 goto err_pcmcia_exit;
604         ssb_chipcommon_init(&bus->chipco);
605         ssb_mipscore_init(&bus->mipscore);
606         err = ssb_fetch_invariants(bus, get_invariants);
607         if (err) {
608                 ssb_bus_may_powerdown(bus);
609                 goto err_pcmcia_exit;
610         }
611         ssb_bus_may_powerdown(bus);
612
613         /* Queue it for attach.
614          * See the comment at the ssb_is_early_boot definition. */
615         list_add_tail(&bus->list, &attach_queue);
616         if (!ssb_is_early_boot) {
617                 /* This is not early boot, so we must attach the bus now */
618                 err = ssb_attach_queued_buses();
619                 if (err)
620                         goto err_dequeue;
621         }
622         next_busnumber++;
623         ssb_buses_unlock();
624
625 out:
626         return err;
627
628 err_dequeue:
629         list_del(&bus->list);
630 err_pcmcia_exit:
631 /*      ssb_pcmcia_exit(bus); */
632 err_pci_exit:
633         ssb_pci_exit(bus);
634 err_unmap:
635         ssb_iounmap(bus);
636 err_disable_xtal:
637         ssb_buses_unlock();
638         ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
639         return err;
640 }
641
642 #ifdef CONFIG_SSB_PCIHOST
643 int ssb_bus_pcibus_register(struct ssb_bus *bus,
644                             struct pci_dev *host_pci)
645 {
646         int err;
647
648         bus->bustype = SSB_BUSTYPE_PCI;
649         bus->host_pci = host_pci;
650         bus->ops = &ssb_pci_ops;
651
652         err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
653         if (!err) {
654                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
655                            "PCI device %s\n", host_pci->dev.bus_id);
656         }
657
658         return err;
659 }
660 EXPORT_SYMBOL(ssb_bus_pcibus_register);
661 #endif /* CONFIG_SSB_PCIHOST */
662
663 #ifdef CONFIG_SSB_PCMCIAHOST
664 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
665                                struct pcmcia_device *pcmcia_dev,
666                                unsigned long baseaddr)
667 {
668         int err;
669
670         bus->bustype = SSB_BUSTYPE_PCMCIA;
671         bus->host_pcmcia = pcmcia_dev;
672         bus->ops = &ssb_pcmcia_ops;
673
674         err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
675         if (!err) {
676                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
677                            "PCMCIA device %s\n", pcmcia_dev->devname);
678         }
679
680         return err;
681 }
682 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
683 #endif /* CONFIG_SSB_PCMCIAHOST */
684
685 int ssb_bus_ssbbus_register(struct ssb_bus *bus,
686                             unsigned long baseaddr,
687                             ssb_invariants_func_t get_invariants)
688 {
689         int err;
690
691         bus->bustype = SSB_BUSTYPE_SSB;
692         bus->ops = &ssb_ssb_ops;
693
694         err = ssb_bus_register(bus, get_invariants, baseaddr);
695         if (!err) {
696                 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
697                            "address 0x%08lX\n", baseaddr);
698         }
699
700         return err;
701 }
702
703 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
704 {
705         drv->drv.name = drv->name;
706         drv->drv.bus = &ssb_bustype;
707         drv->drv.owner = owner;
708
709         return driver_register(&drv->drv);
710 }
711 EXPORT_SYMBOL(__ssb_driver_register);
712
713 void ssb_driver_unregister(struct ssb_driver *drv)
714 {
715         driver_unregister(&drv->drv);
716 }
717 EXPORT_SYMBOL(ssb_driver_unregister);
718
719 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
720 {
721         struct ssb_bus *bus = dev->bus;
722         struct ssb_device *ent;
723         int i;
724
725         for (i = 0; i < bus->nr_devices; i++) {
726                 ent = &(bus->devices[i]);
727                 if (ent->id.vendor != dev->id.vendor)
728                         continue;
729                 if (ent->id.coreid != dev->id.coreid)
730                         continue;
731
732                 ent->devtypedata = data;
733         }
734 }
735 EXPORT_SYMBOL(ssb_set_devtypedata);
736
737 static u32 clkfactor_f6_resolve(u32 v)
738 {
739         /* map the magic values */
740         switch (v) {
741         case SSB_CHIPCO_CLK_F6_2:
742                 return 2;
743         case SSB_CHIPCO_CLK_F6_3:
744                 return 3;
745         case SSB_CHIPCO_CLK_F6_4:
746                 return 4;
747         case SSB_CHIPCO_CLK_F6_5:
748                 return 5;
749         case SSB_CHIPCO_CLK_F6_6:
750                 return 6;
751         case SSB_CHIPCO_CLK_F6_7:
752                 return 7;
753         }
754         return 0;
755 }
756
757 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
758 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
759 {
760         u32 n1, n2, clock, m1, m2, m3, mc;
761
762         n1 = (n & SSB_CHIPCO_CLK_N1);
763         n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
764
765         switch (plltype) {
766         case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
767                 if (m & SSB_CHIPCO_CLK_T6_MMASK)
768                         return SSB_CHIPCO_CLK_T6_M0;
769                 return SSB_CHIPCO_CLK_T6_M1;
770         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
771         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
772         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
773         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
774                 n1 = clkfactor_f6_resolve(n1);
775                 n2 += SSB_CHIPCO_CLK_F5_BIAS;
776                 break;
777         case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
778                 n1 += SSB_CHIPCO_CLK_T2_BIAS;
779                 n2 += SSB_CHIPCO_CLK_T2_BIAS;
780                 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
781                 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
782                 break;
783         case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
784                 return 100000000;
785         default:
786                 SSB_WARN_ON(1);
787         }
788
789         switch (plltype) {
790         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
791         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
792                 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
793                 break;
794         default:
795                 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
796         }
797         if (!clock)
798                 return 0;
799
800         m1 = (m & SSB_CHIPCO_CLK_M1);
801         m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
802         m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
803         mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
804
805         switch (plltype) {
806         case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
807         case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
808         case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
809         case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
810                 m1 = clkfactor_f6_resolve(m1);
811                 if ((plltype == SSB_PLLTYPE_1) ||
812                     (plltype == SSB_PLLTYPE_3))
813                         m2 += SSB_CHIPCO_CLK_F5_BIAS;
814                 else
815                         m2 = clkfactor_f6_resolve(m2);
816                 m3 = clkfactor_f6_resolve(m3);
817
818                 switch (mc) {
819                 case SSB_CHIPCO_CLK_MC_BYPASS:
820                         return clock;
821                 case SSB_CHIPCO_CLK_MC_M1:
822                         return (clock / m1);
823                 case SSB_CHIPCO_CLK_MC_M1M2:
824                         return (clock / (m1 * m2));
825                 case SSB_CHIPCO_CLK_MC_M1M2M3:
826                         return (clock / (m1 * m2 * m3));
827                 case SSB_CHIPCO_CLK_MC_M1M3:
828                         return (clock / (m1 * m3));
829                 }
830                 return 0;
831         case SSB_PLLTYPE_2:
832                 m1 += SSB_CHIPCO_CLK_T2_BIAS;
833                 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
834                 m3 += SSB_CHIPCO_CLK_T2_BIAS;
835                 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
836                 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
837                 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
838
839                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
840                         clock /= m1;
841                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
842                         clock /= m2;
843                 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
844                         clock /= m3;
845                 return clock;
846         default:
847                 SSB_WARN_ON(1);
848         }
849         return 0;
850 }
851
852 /* Get the current speed the backplane is running at */
853 u32 ssb_clockspeed(struct ssb_bus *bus)
854 {
855         u32 rate;
856         u32 plltype;
857         u32 clkctl_n, clkctl_m;
858
859         if (ssb_extif_available(&bus->extif))
860                 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
861                                            &clkctl_n, &clkctl_m);
862         else if (bus->chipco.dev)
863                 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
864                                             &clkctl_n, &clkctl_m);
865         else
866                 return 0;
867
868         if (bus->chip_id == 0x5365) {
869                 rate = 100000000;
870         } else {
871                 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
872                 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
873                         rate /= 2;
874         }
875
876         return rate;
877 }
878 EXPORT_SYMBOL(ssb_clockspeed);
879
880 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
881 {
882         u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
883
884         /* The REJECT bit changed position in TMSLOW between
885          * Backplane revisions. */
886         switch (rev) {
887         case SSB_IDLOW_SSBREV_22:
888                 return SSB_TMSLOW_REJECT_22;
889         case SSB_IDLOW_SSBREV_23:
890                 return SSB_TMSLOW_REJECT_23;
891         case SSB_IDLOW_SSBREV_24:     /* TODO - find the proper REJECT bits */
892         case SSB_IDLOW_SSBREV_25:     /* same here */
893         case SSB_IDLOW_SSBREV_26:     /* same here */
894         case SSB_IDLOW_SSBREV_27:     /* same here */
895                 return SSB_TMSLOW_REJECT_23;    /* this is a guess */
896         default:
897                 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
898                 WARN_ON(1);
899         }
900         return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
901 }
902
903 int ssb_device_is_enabled(struct ssb_device *dev)
904 {
905         u32 val;
906         u32 reject;
907
908         reject = ssb_tmslow_reject_bitmask(dev);
909         val = ssb_read32(dev, SSB_TMSLOW);
910         val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
911
912         return (val == SSB_TMSLOW_CLOCK);
913 }
914 EXPORT_SYMBOL(ssb_device_is_enabled);
915
916 static void ssb_flush_tmslow(struct ssb_device *dev)
917 {
918         /* Make _really_ sure the device has finished the TMSLOW
919          * register write transaction, as we risk running into
920          * a machine check exception otherwise.
921          * Do this by reading the register back to commit the
922          * PCI write and delay an additional usec for the device
923          * to react to the change. */
924         ssb_read32(dev, SSB_TMSLOW);
925         udelay(1);
926 }
927
928 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
929 {
930         u32 val;
931
932         ssb_device_disable(dev, core_specific_flags);
933         ssb_write32(dev, SSB_TMSLOW,
934                     SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
935                     SSB_TMSLOW_FGC | core_specific_flags);
936         ssb_flush_tmslow(dev);
937
938         /* Clear SERR if set. This is a hw bug workaround. */
939         if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
940                 ssb_write32(dev, SSB_TMSHIGH, 0);
941
942         val = ssb_read32(dev, SSB_IMSTATE);
943         if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
944                 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
945                 ssb_write32(dev, SSB_IMSTATE, val);
946         }
947
948         ssb_write32(dev, SSB_TMSLOW,
949                     SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
950                     core_specific_flags);
951         ssb_flush_tmslow(dev);
952
953         ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
954                     core_specific_flags);
955         ssb_flush_tmslow(dev);
956 }
957 EXPORT_SYMBOL(ssb_device_enable);
958
959 /* Wait for a bit in a register to get set or unset.
960  * timeout is in units of ten-microseconds */
961 static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask,
962                         int timeout, int set)
963 {
964         int i;
965         u32 val;
966
967         for (i = 0; i < timeout; i++) {
968                 val = ssb_read32(dev, reg);
969                 if (set) {
970                         if (val & bitmask)
971                                 return 0;
972                 } else {
973                         if (!(val & bitmask))
974                                 return 0;
975                 }
976                 udelay(10);
977         }
978         printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
979                             "register %04X to %s.\n",
980                bitmask, reg, (set ? "set" : "clear"));
981
982         return -ETIMEDOUT;
983 }
984
985 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
986 {
987         u32 reject;
988
989         if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
990                 return;
991
992         reject = ssb_tmslow_reject_bitmask(dev);
993         ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
994         ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1);
995         ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
996         ssb_write32(dev, SSB_TMSLOW,
997                     SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
998                     reject | SSB_TMSLOW_RESET |
999                     core_specific_flags);
1000         ssb_flush_tmslow(dev);
1001
1002         ssb_write32(dev, SSB_TMSLOW,
1003                     reject | SSB_TMSLOW_RESET |
1004                     core_specific_flags);
1005         ssb_flush_tmslow(dev);
1006 }
1007 EXPORT_SYMBOL(ssb_device_disable);
1008
1009 u32 ssb_dma_translation(struct ssb_device *dev)
1010 {
1011         switch (dev->bus->bustype) {
1012         case SSB_BUSTYPE_SSB:
1013                 return 0;
1014         case SSB_BUSTYPE_PCI:
1015         case SSB_BUSTYPE_PCMCIA:
1016                 return SSB_PCI_DMA;
1017         }
1018         return 0;
1019 }
1020 EXPORT_SYMBOL(ssb_dma_translation);
1021
1022 int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask)
1023 {
1024         struct device *dma_dev = ssb_dev->dma_dev;
1025
1026 #ifdef CONFIG_SSB_PCIHOST
1027         if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI)
1028                 return dma_set_mask(dma_dev, mask);
1029 #endif
1030         dma_dev->coherent_dma_mask = mask;
1031         dma_dev->dma_mask = &dma_dev->coherent_dma_mask;
1032
1033         return 0;
1034 }
1035 EXPORT_SYMBOL(ssb_dma_set_mask);
1036
1037 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1038 {
1039         struct ssb_chipcommon *cc;
1040         int err = 0;
1041
1042         /* On buses where more than one core may be working
1043          * at a time, we must not powerdown stuff if there are
1044          * still cores that may want to run. */
1045         if (bus->bustype == SSB_BUSTYPE_SSB)
1046                 goto out;
1047
1048         cc = &bus->chipco;
1049
1050         if (!cc->dev)
1051                 goto out;
1052         if (cc->dev->id.revision < 5)
1053                 goto out;
1054
1055         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1056         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1057         if (err)
1058                 goto error;
1059 out:
1060 #ifdef CONFIG_SSB_DEBUG
1061         bus->powered_up = 0;
1062 #endif
1063         return err;
1064 error:
1065         ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1066         goto out;
1067 }
1068 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1069
1070 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1071 {
1072         struct ssb_chipcommon *cc;
1073         int err;
1074         enum ssb_clkmode mode;
1075
1076         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1077         if (err)
1078                 goto error;
1079         cc = &bus->chipco;
1080         mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1081         ssb_chipco_set_clockmode(cc, mode);
1082
1083 #ifdef CONFIG_SSB_DEBUG
1084         bus->powered_up = 1;
1085 #endif
1086         return 0;
1087 error:
1088         ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1089         return err;
1090 }
1091 EXPORT_SYMBOL(ssb_bus_powerup);
1092
1093 u32 ssb_admatch_base(u32 adm)
1094 {
1095         u32 base = 0;
1096
1097         switch (adm & SSB_ADM_TYPE) {
1098         case SSB_ADM_TYPE0:
1099                 base = (adm & SSB_ADM_BASE0);
1100                 break;
1101         case SSB_ADM_TYPE1:
1102                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1103                 base = (adm & SSB_ADM_BASE1);
1104                 break;
1105         case SSB_ADM_TYPE2:
1106                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1107                 base = (adm & SSB_ADM_BASE2);
1108                 break;
1109         default:
1110                 SSB_WARN_ON(1);
1111         }
1112
1113         return base;
1114 }
1115 EXPORT_SYMBOL(ssb_admatch_base);
1116
1117 u32 ssb_admatch_size(u32 adm)
1118 {
1119         u32 size = 0;
1120
1121         switch (adm & SSB_ADM_TYPE) {
1122         case SSB_ADM_TYPE0:
1123                 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1124                 break;
1125         case SSB_ADM_TYPE1:
1126                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1127                 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1128                 break;
1129         case SSB_ADM_TYPE2:
1130                 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1131                 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1132                 break;
1133         default:
1134                 SSB_WARN_ON(1);
1135         }
1136         size = (1 << (size + 1));
1137
1138         return size;
1139 }
1140 EXPORT_SYMBOL(ssb_admatch_size);
1141
1142 static int __init ssb_modinit(void)
1143 {
1144         int err;
1145
1146         /* See the comment at the ssb_is_early_boot definition */
1147         ssb_is_early_boot = 0;
1148         err = bus_register(&ssb_bustype);
1149         if (err)
1150                 return err;
1151
1152         /* Maybe we already registered some buses at early boot.
1153          * Check for this and attach them
1154          */
1155         ssb_buses_lock();
1156         err = ssb_attach_queued_buses();
1157         ssb_buses_unlock();
1158         if (err)
1159                 bus_unregister(&ssb_bustype);
1160
1161         err = b43_pci_ssb_bridge_init();
1162         if (err) {
1163                 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1164                            "initialization failed");
1165                 /* don't fail SSB init because of this */
1166                 err = 0;
1167         }
1168
1169         return err;
1170 }
1171 /* ssb must be initialized after PCI but before the ssb drivers.
1172  * That means we must use some initcall between subsys_initcall
1173  * and device_initcall. */
1174 fs_initcall(ssb_modinit);
1175
1176 static void __exit ssb_modexit(void)
1177 {
1178         b43_pci_ssb_bridge_exit();
1179         bus_unregister(&ssb_bustype);
1180 }
1181 module_exit(ssb_modexit)