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memcg: always create memsw files if CONFIG_CGROUP_MEM_RES_CTLR_SWAP
[linux-2.6.git] / drivers / ssb / main.c
blobdf0f145c22fc80c175d277cca0f68647fbfd90fd
1 /*
2 * Sonics Silicon Backplane
3 * Subsystem core
4 *
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
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/module.h>
16 #include <linux/ssb/ssb.h>
17 #include <linux/ssb/ssb_regs.h>
18 #include <linux/ssb/ssb_driver_gige.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/pci.h>
21 #include <linux/mmc/sdio_func.h>
22 #include <linux/slab.h>
23
24 #include <pcmcia/cistpl.h>
25 #include <pcmcia/ds.h>
26
27
28 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
29 MODULE_LICENSE("GPL");
30
31
32 /* Temporary list of yet-to-be-attached buses */
33 static LIST_HEAD(attach_queue);
34 /* List if running buses */
35 static LIST_HEAD(buses);
36 /* Software ID counter */
37 static unsigned int next_busnumber;
38 /* buses_mutes locks the two buslists and the next_busnumber.
39 * Don't lock this directly, but use ssb_buses_[un]lock() below. */
40 static DEFINE_MUTEX(buses_mutex);
41
42 /* There are differences in the codeflow, if the bus is
43 * initialized from early boot, as various needed services
44 * are not available early. This is a mechanism to delay
45 * these initializations to after early boot has finished.
46 * It's also used to avoid mutex locking, as that's not
47 * available and needed early. */
48 static bool ssb_is_early_boot = 1;
49
50 static void ssb_buses_lock(void);
51 static void ssb_buses_unlock(void);
52
53
54 #ifdef CONFIG_SSB_PCIHOST
55 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
56 {
57 struct ssb_bus *bus;
58
59 ssb_buses_lock();
60 list_for_each_entry(bus, &buses, list) {
61 if (bus->bustype == SSB_BUSTYPE_PCI &&
62 bus->host_pci == pdev)
63 goto found;
64 }
65 bus = NULL;
66 found:
67 ssb_buses_unlock();
68
69 return bus;
70 }
71 #endif /* CONFIG_SSB_PCIHOST */
72
73 #ifdef CONFIG_SSB_PCMCIAHOST
74 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
75 {
76 struct ssb_bus *bus;
77
78 ssb_buses_lock();
79 list_for_each_entry(bus, &buses, list) {
80 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
81 bus->host_pcmcia == pdev)
82 goto found;
83 }
84 bus = NULL;
85 found:
86 ssb_buses_unlock();
87
88 return bus;
89 }
90 #endif /* CONFIG_SSB_PCMCIAHOST */
91
92 #ifdef CONFIG_SSB_SDIOHOST
93 struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
94 {
95 struct ssb_bus *bus;
96
97 ssb_buses_lock();
98 list_for_each_entry(bus, &buses, list) {
99 if (bus->bustype == SSB_BUSTYPE_SDIO &&
100 bus->host_sdio == func)
101 goto found;
102 }
103 bus = NULL;
104 found:
105 ssb_buses_unlock();
106
107 return bus;
108 }
109 #endif /* CONFIG_SSB_SDIOHOST */
110
111 int ssb_for_each_bus_call(unsigned long data,
112 int (*func)(struct ssb_bus *bus, unsigned long data))
113 {
114 struct ssb_bus *bus;
115 int res;
116
117 ssb_buses_lock();
118 list_for_each_entry(bus, &buses, list) {
119 res = func(bus, data);
120 if (res >= 0) {
121 ssb_buses_unlock();
122 return res;
123 }
124 }
125 ssb_buses_unlock();
126
127 return -ENODEV;
128 }
129
130 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
131 {
132 if (dev)
133 get_device(dev->dev);
134 return dev;
135 }
136
137 static void ssb_device_put(struct ssb_device *dev)
138 {
139 if (dev)
140 put_device(dev->dev);
141 }
142
143 static int ssb_device_resume(struct device *dev)
144 {
145 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
146 struct ssb_driver *ssb_drv;
147 int err = 0;
148
149 if (dev->driver) {
150 ssb_drv = drv_to_ssb_drv(dev->driver);
151 if (ssb_drv && ssb_drv->resume)
152 err = ssb_drv->resume(ssb_dev);
153 if (err)
154 goto out;
155 }
156 out:
157 return err;
158 }
159
160 static int ssb_device_suspend(struct device *dev, pm_message_t state)
161 {
162 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
163 struct ssb_driver *ssb_drv;
164 int err = 0;
165
166 if (dev->driver) {
167 ssb_drv = drv_to_ssb_drv(dev->driver);
168 if (ssb_drv && ssb_drv->suspend)
169 err = ssb_drv->suspend(ssb_dev, state);
170 if (err)
171 goto out;
172 }
173 out:
174 return err;
175 }
176
177 int ssb_bus_resume(struct ssb_bus *bus)
178 {
179 int err;
180
181 /* Reset HW state information in memory, so that HW is
182 * completely reinitialized. */
183 bus->mapped_device = NULL;
184 #ifdef CONFIG_SSB_DRIVER_PCICORE
185 bus->pcicore.setup_done = 0;
186 #endif
187
188 err = ssb_bus_powerup(bus, 0);
189 if (err)
190 return err;
191 err = ssb_pcmcia_hardware_setup(bus);
192 if (err) {
193 ssb_bus_may_powerdown(bus);
194 return err;
195 }
196 ssb_chipco_resume(&bus->chipco);
197 ssb_bus_may_powerdown(bus);
198
199 return 0;
200 }
201 EXPORT_SYMBOL(ssb_bus_resume);
202
203 int ssb_bus_suspend(struct ssb_bus *bus)
204 {
205 ssb_chipco_suspend(&bus->chipco);
206 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
207
208 return 0;
209 }
210 EXPORT_SYMBOL(ssb_bus_suspend);
211
212 #ifdef CONFIG_SSB_SPROM
213 /** ssb_devices_freeze - Freeze all devices on the bus.
214 *
215 * After freezing no device driver will be handling a device
216 * on this bus anymore. ssb_devices_thaw() must be called after
217 * a successful freeze to reactivate the devices.
218 *
219 * @bus: The bus.
220 * @ctx: Context structure. Pass this to ssb_devices_thaw().
221 */
222 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
223 {
224 struct ssb_device *sdev;
225 struct ssb_driver *sdrv;
226 unsigned int i;
227
228 memset(ctx, 0, sizeof(*ctx));
229 ctx->bus = bus;
230 SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
231
232 for (i = 0; i < bus->nr_devices; i++) {
233 sdev = ssb_device_get(&bus->devices[i]);
234
235 if (!sdev->dev || !sdev->dev->driver ||
236 !device_is_registered(sdev->dev)) {
237 ssb_device_put(sdev);
238 continue;
239 }
240 sdrv = drv_to_ssb_drv(sdev->dev->driver);
241 if (SSB_WARN_ON(!sdrv->remove))
242 continue;
243 sdrv->remove(sdev);
244 ctx->device_frozen[i] = 1;
245 }
246
247 return 0;
248 }
249
250 /** ssb_devices_thaw - Unfreeze all devices on the bus.
251 *
252 * This will re-attach the device drivers and re-init the devices.
253 *
254 * @ctx: The context structure from ssb_devices_freeze()
255 */
256 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
257 {
258 struct ssb_bus *bus = ctx->bus;
259 struct ssb_device *sdev;
260 struct ssb_driver *sdrv;
261 unsigned int i;
262 int err, result = 0;
263
264 for (i = 0; i < bus->nr_devices; i++) {
265 if (!ctx->device_frozen[i])
266 continue;
267 sdev = &bus->devices[i];
268
269 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
270 continue;
271 sdrv = drv_to_ssb_drv(sdev->dev->driver);
272 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
273 continue;
274
275 err = sdrv->probe(sdev, &sdev->id);
276 if (err) {
277 ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
278 dev_name(sdev->dev));
279 result = err;
280 }
281 ssb_device_put(sdev);
282 }
283
284 return result;
285 }
286 #endif /* CONFIG_SSB_SPROM */
287
288 static void ssb_device_shutdown(struct device *dev)
289 {
290 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
291 struct ssb_driver *ssb_drv;
292
293 if (!dev->driver)
294 return;
295 ssb_drv = drv_to_ssb_drv(dev->driver);
296 if (ssb_drv && ssb_drv->shutdown)
297 ssb_drv->shutdown(ssb_dev);
298 }
299
300 static int ssb_device_remove(struct device *dev)
301 {
302 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
303 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
304
305 if (ssb_drv && ssb_drv->remove)
306 ssb_drv->remove(ssb_dev);
307 ssb_device_put(ssb_dev);
308
309 return 0;
310 }
311
312 static int ssb_device_probe(struct device *dev)
313 {
314 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
315 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
316 int err = 0;
317
318 ssb_device_get(ssb_dev);
319 if (ssb_drv && ssb_drv->probe)
320 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
321 if (err)
322 ssb_device_put(ssb_dev);
323
324 return err;
325 }
326
327 static int ssb_match_devid(const struct ssb_device_id *tabid,
328 const struct ssb_device_id *devid)
329 {
330 if ((tabid->vendor != devid->vendor) &&
331 tabid->vendor != SSB_ANY_VENDOR)
332 return 0;
333 if ((tabid->coreid != devid->coreid) &&
334 tabid->coreid != SSB_ANY_ID)
335 return 0;
336 if ((tabid->revision != devid->revision) &&
337 tabid->revision != SSB_ANY_REV)
338 return 0;
339 return 1;
340 }
341
342 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
343 {
344 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
345 struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
346 const struct ssb_device_id *id;
347
348 for (id = ssb_drv->id_table;
349 id->vendor || id->coreid || id->revision;
350 id++) {
351 if (ssb_match_devid(id, &ssb_dev->id))
352 return 1; /* found */
353 }
354
355 return 0;
356 }
357
358 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
359 {
360 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
361
362 if (!dev)
363 return -ENODEV;
364
365 return add_uevent_var(env,
366 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
367 ssb_dev->id.vendor, ssb_dev->id.coreid,
368 ssb_dev->id.revision);
369 }
370
371 #define ssb_config_attr(attrib, field, format_string) \
372 static ssize_t \
373 attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
374 { \
375 return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
376 }
377
378 ssb_config_attr(core_num, core_index, "%u\n")
379 ssb_config_attr(coreid, id.coreid, "0x%04x\n")
380 ssb_config_attr(vendor, id.vendor, "0x%04x\n")
381 ssb_config_attr(revision, id.revision, "%u\n")
382 ssb_config_attr(irq, irq, "%u\n")
383 static ssize_t
384 name_show(struct device *dev, struct device_attribute *attr, char *buf)
385 {
386 return sprintf(buf, "%s\n",
387 ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
388 }
389
390 static struct device_attribute ssb_device_attrs[] = {
391 __ATTR_RO(name),
392 __ATTR_RO(core_num),
393 __ATTR_RO(coreid),
394 __ATTR_RO(vendor),
395 __ATTR_RO(revision),
396 __ATTR_RO(irq),
397 __ATTR_NULL,
398 };
399
400 static struct bus_type ssb_bustype = {
401 .name = "ssb",
402 .match = ssb_bus_match,
403 .probe = ssb_device_probe,
404 .remove = ssb_device_remove,
405 .shutdown = ssb_device_shutdown,
406 .suspend = ssb_device_suspend,
407 .resume = ssb_device_resume,
408 .uevent = ssb_device_uevent,
409 .dev_attrs = ssb_device_attrs,
410 };
411
412 static void ssb_buses_lock(void)
413 {
414 /* See the comment at the ssb_is_early_boot definition */
415 if (!ssb_is_early_boot)
416 mutex_lock(&buses_mutex);
417 }
418
419 static void ssb_buses_unlock(void)
420 {
421 /* See the comment at the ssb_is_early_boot definition */
422 if (!ssb_is_early_boot)
423 mutex_unlock(&buses_mutex);
424 }
425
426 static void ssb_devices_unregister(struct ssb_bus *bus)
427 {
428 struct ssb_device *sdev;
429 int i;
430
431 for (i = bus->nr_devices - 1; i >= 0; i--) {
432 sdev = &(bus->devices[i]);
433 if (sdev->dev)
434 device_unregister(sdev->dev);
435 }
436 }
437
438 void ssb_bus_unregister(struct ssb_bus *bus)
439 {
440 ssb_buses_lock();
441 ssb_devices_unregister(bus);
442 list_del(&bus->list);
443 ssb_buses_unlock();
444
445 ssb_pcmcia_exit(bus);
446 ssb_pci_exit(bus);
447 ssb_iounmap(bus);
448 }
449 EXPORT_SYMBOL(ssb_bus_unregister);
450
451 static void ssb_release_dev(struct device *dev)
452 {
453 struct __ssb_dev_wrapper *devwrap;
454
455 devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
456 kfree(devwrap);
457 }
458
459 static int ssb_devices_register(struct ssb_bus *bus)
460 {
461 struct ssb_device *sdev;
462 struct device *dev;
463 struct __ssb_dev_wrapper *devwrap;
464 int i, err = 0;
465 int dev_idx = 0;
466
467 for (i = 0; i < bus->nr_devices; i++) {
468 sdev = &(bus->devices[i]);
469
470 /* We don't register SSB-system devices to the kernel,
471 * as the drivers for them are built into SSB. */
472 switch (sdev->id.coreid) {
473 case SSB_DEV_CHIPCOMMON:
474 case SSB_DEV_PCI:
475 case SSB_DEV_PCIE:
476 case SSB_DEV_PCMCIA:
477 case SSB_DEV_MIPS:
478 case SSB_DEV_MIPS_3302:
479 case SSB_DEV_EXTIF:
480 continue;
481 }
482
483 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
484 if (!devwrap) {
485 ssb_printk(KERN_ERR PFX
486 "Could not allocate device\n");
487 err = -ENOMEM;
488 goto error;
489 }
490 dev = &devwrap->dev;
491 devwrap->sdev = sdev;
492
493 dev->release = ssb_release_dev;
494 dev->bus = &ssb_bustype;
495 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
496
497 switch (bus->bustype) {
498 case SSB_BUSTYPE_PCI:
499 #ifdef CONFIG_SSB_PCIHOST
500 sdev->irq = bus->host_pci->irq;
501 dev->parent = &bus->host_pci->dev;
502 sdev->dma_dev = dev->parent;
503 #endif
504 break;
505 case SSB_BUSTYPE_PCMCIA:
506 #ifdef CONFIG_SSB_PCMCIAHOST
507 sdev->irq = bus->host_pcmcia->irq;
508 dev->parent = &bus->host_pcmcia->dev;
509 #endif
510 break;
511 case SSB_BUSTYPE_SDIO:
512 #ifdef CONFIG_SSB_SDIOHOST
513 dev->parent = &bus->host_sdio->dev;
514 #endif
515 break;
516 case SSB_BUSTYPE_SSB:
517 dev->dma_mask = &dev->coherent_dma_mask;
518 sdev->dma_dev = dev;
519 break;
520 }
521
522 sdev->dev = dev;
523 err = device_register(dev);
524 if (err) {
525 ssb_printk(KERN_ERR PFX
526 "Could not register %s\n",
527 dev_name(dev));
528 /* Set dev to NULL to not unregister
529 * dev on error unwinding. */
530 sdev->dev = NULL;
531 kfree(devwrap);
532 goto error;
533 }
534 dev_idx++;
535 }
536
537 return 0;
538 error:
539 /* Unwind the already registered devices. */
540 ssb_devices_unregister(bus);
541 return err;
542 }
543
544 /* Needs ssb_buses_lock() */
545 static int __devinit ssb_attach_queued_buses(void)
546 {
547 struct ssb_bus *bus, *n;
548 int err = 0;
549 int drop_them_all = 0;
550
551 list_for_each_entry_safe(bus, n, &attach_queue, list) {
552 if (drop_them_all) {
553 list_del(&bus->list);
554 continue;
555 }
556 /* Can't init the PCIcore in ssb_bus_register(), as that
557 * is too early in boot for embedded systems
558 * (no udelay() available). So do it here in attach stage.
559 */
560 err = ssb_bus_powerup(bus, 0);
561 if (err)
562 goto error;
563 ssb_pcicore_init(&bus->pcicore);
564 ssb_bus_may_powerdown(bus);
565
566 err = ssb_devices_register(bus);
567 error:
568 if (err) {
569 drop_them_all = 1;
570 list_del(&bus->list);
571 continue;
572 }
573 list_move_tail(&bus->list, &buses);
574 }
575
576 return err;
577 }
578
579 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
580 {
581 struct ssb_bus *bus = dev->bus;
582
583 offset += dev->core_index * SSB_CORE_SIZE;
584 return readb(bus->mmio + offset);
585 }
586
587 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
588 {
589 struct ssb_bus *bus = dev->bus;
590
591 offset += dev->core_index * SSB_CORE_SIZE;
592 return readw(bus->mmio + offset);
593 }
594
595 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
596 {
597 struct ssb_bus *bus = dev->bus;
598
599 offset += dev->core_index * SSB_CORE_SIZE;
600 return readl(bus->mmio + offset);
601 }
602
603 #ifdef CONFIG_SSB_BLOCKIO
604 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
605 size_t count, u16 offset, u8 reg_width)
606 {
607 struct ssb_bus *bus = dev->bus;
608 void __iomem *addr;
609
610 offset += dev->core_index * SSB_CORE_SIZE;
611 addr = bus->mmio + offset;
612
613 switch (reg_width) {
614 case sizeof(u8): {
615 u8 *buf = buffer;
616
617 while (count) {
618 *buf = __raw_readb(addr);
619 buf++;
620 count--;
621 }
622 break;
623 }
624 case sizeof(u16): {
625 __le16 *buf = buffer;
626
627 SSB_WARN_ON(count & 1);
628 while (count) {
629 *buf = (__force __le16)__raw_readw(addr);
630 buf++;
631 count -= 2;
632 }
633 break;
634 }
635 case sizeof(u32): {
636 __le32 *buf = buffer;
637
638 SSB_WARN_ON(count & 3);
639 while (count) {
640 *buf = (__force __le32)__raw_readl(addr);
641 buf++;
642 count -= 4;
643 }
644 break;
645 }
646 default:
647 SSB_WARN_ON(1);
648 }
649 }
650 #endif /* CONFIG_SSB_BLOCKIO */
651
652 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
653 {
654 struct ssb_bus *bus = dev->bus;
655
656 offset += dev->core_index * SSB_CORE_SIZE;
657 writeb(value, bus->mmio + offset);
658 }
659
660 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
661 {
662 struct ssb_bus *bus = dev->bus;
663
664 offset += dev->core_index * SSB_CORE_SIZE;
665 writew(value, bus->mmio + offset);
666 }
667
668 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
669 {
670 struct ssb_bus *bus = dev->bus;
671
672 offset += dev->core_index * SSB_CORE_SIZE;
673 writel(value, bus->mmio + offset);
674 }
675
676 #ifdef CONFIG_SSB_BLOCKIO
677 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
678 size_t count, u16 offset, u8 reg_width)
679 {
680 struct ssb_bus *bus = dev->bus;
681 void __iomem *addr;
682
683 offset += dev->core_index * SSB_CORE_SIZE;
684 addr = bus->mmio + offset;
685
686 switch (reg_width) {
687 case sizeof(u8): {
688 const u8 *buf = buffer;
689
690 while (count) {
691 __raw_writeb(*buf, addr);
692 buf++;
693 count--;
694 }
695 break;
696 }
697 case sizeof(u16): {
698 const __le16 *buf = buffer;
699
700 SSB_WARN_ON(count & 1);
701 while (count) {
702 __raw_writew((__force u16)(*buf), addr);
703 buf++;
704 count -= 2;
705 }
706 break;
707 }
708 case sizeof(u32): {
709 const __le32 *buf = buffer;
710
711 SSB_WARN_ON(count & 3);
712 while (count) {
713 __raw_writel((__force u32)(*buf), addr);
714 buf++;
715 count -= 4;
716 }
717 break;
718 }
719 default:
720 SSB_WARN_ON(1);
721 }
722 }
723 #endif /* CONFIG_SSB_BLOCKIO */
724
725 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
726 static const struct ssb_bus_ops ssb_ssb_ops = {
727 .read8 = ssb_ssb_read8,
728 .read16 = ssb_ssb_read16,
729 .read32 = ssb_ssb_read32,
730 .write8 = ssb_ssb_write8,
731 .write16 = ssb_ssb_write16,
732 .write32 = ssb_ssb_write32,
733 #ifdef CONFIG_SSB_BLOCKIO
734 .block_read = ssb_ssb_block_read,
735 .block_write = ssb_ssb_block_write,
736 #endif
737 };
738
739 static int ssb_fetch_invariants(struct ssb_bus *bus,
740 ssb_invariants_func_t get_invariants)
741 {
742 struct ssb_init_invariants iv;
743 int err;
744
745 memset(&iv, 0, sizeof(iv));
746 err = get_invariants(bus, &iv);
747 if (err)
748 goto out;
749 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
750 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
751 bus->has_cardbus_slot = iv.has_cardbus_slot;
752 out:
753 return err;
754 }
755
756 static int __devinit ssb_bus_register(struct ssb_bus *bus,
757 ssb_invariants_func_t get_invariants,
758 unsigned long baseaddr)
759 {
760 int err;
761
762 spin_lock_init(&bus->bar_lock);
763 INIT_LIST_HEAD(&bus->list);
764 #ifdef CONFIG_SSB_EMBEDDED
765 spin_lock_init(&bus->gpio_lock);
766 #endif
767
768 /* Powerup the bus */
769 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
770 if (err)
771 goto out;
772
773 /* Init SDIO-host device (if any), before the scan */
774 err = ssb_sdio_init(bus);
775 if (err)
776 goto err_disable_xtal;
777
778 ssb_buses_lock();
779 bus->busnumber = next_busnumber;
780 /* Scan for devices (cores) */
781 err = ssb_bus_scan(bus, baseaddr);
782 if (err)
783 goto err_sdio_exit;
784
785 /* Init PCI-host device (if any) */
786 err = ssb_pci_init(bus);
787 if (err)
788 goto err_unmap;
789 /* Init PCMCIA-host device (if any) */
790 err = ssb_pcmcia_init(bus);
791 if (err)
792 goto err_pci_exit;
793
794 /* Initialize basic system devices (if available) */
795 err = ssb_bus_powerup(bus, 0);
796 if (err)
797 goto err_pcmcia_exit;
798 ssb_chipcommon_init(&bus->chipco);
799 ssb_mipscore_init(&bus->mipscore);
800 err = ssb_fetch_invariants(bus, get_invariants);
801 if (err) {
802 ssb_bus_may_powerdown(bus);
803 goto err_pcmcia_exit;
804 }
805 ssb_bus_may_powerdown(bus);
806
807 /* Queue it for attach.
808 * See the comment at the ssb_is_early_boot definition. */
809 list_add_tail(&bus->list, &attach_queue);
810 if (!ssb_is_early_boot) {
811 /* This is not early boot, so we must attach the bus now */
812 err = ssb_attach_queued_buses();
813 if (err)
814 goto err_dequeue;
815 }
816 next_busnumber++;
817 ssb_buses_unlock();
818
819 out:
820 return err;
821
822 err_dequeue:
823 list_del(&bus->list);
824 err_pcmcia_exit:
825 ssb_pcmcia_exit(bus);
826 err_pci_exit:
827 ssb_pci_exit(bus);
828 err_unmap:
829 ssb_iounmap(bus);
830 err_sdio_exit:
831 ssb_sdio_exit(bus);
832 err_disable_xtal:
833 ssb_buses_unlock();
834 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
835 return err;
836 }
837
838 #ifdef CONFIG_SSB_PCIHOST
839 int __devinit ssb_bus_pcibus_register(struct ssb_bus *bus,
840 struct pci_dev *host_pci)
841 {
842 int err;
843
844 bus->bustype = SSB_BUSTYPE_PCI;
845 bus->host_pci = host_pci;
846 bus->ops = &ssb_pci_ops;
847
848 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
849 if (!err) {
850 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
851 "PCI device %s\n", dev_name(&host_pci->dev));
852 } else {
853 ssb_printk(KERN_ERR PFX "Failed to register PCI version"
854 " of SSB with error %d\n", err);
855 }
856
857 return err;
858 }
859 EXPORT_SYMBOL(ssb_bus_pcibus_register);
860 #endif /* CONFIG_SSB_PCIHOST */
861
862 #ifdef CONFIG_SSB_PCMCIAHOST
863 int __devinit ssb_bus_pcmciabus_register(struct ssb_bus *bus,
864 struct pcmcia_device *pcmcia_dev,
865 unsigned long baseaddr)
866 {
867 int err;
868
869 bus->bustype = SSB_BUSTYPE_PCMCIA;
870 bus->host_pcmcia = pcmcia_dev;
871 bus->ops = &ssb_pcmcia_ops;
872
873 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
874 if (!err) {
875 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
876 "PCMCIA device %s\n", pcmcia_dev->devname);
877 }
878
879 return err;
880 }
881 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
882 #endif /* CONFIG_SSB_PCMCIAHOST */
883
884 #ifdef CONFIG_SSB_SDIOHOST
885 int __devinit ssb_bus_sdiobus_register(struct ssb_bus *bus,
886 struct sdio_func *func,
887 unsigned int quirks)
888 {
889 int err;
890
891 bus->bustype = SSB_BUSTYPE_SDIO;
892 bus->host_sdio = func;
893 bus->ops = &ssb_sdio_ops;
894 bus->quirks = quirks;
895
896 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
897 if (!err) {
898 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
899 "SDIO device %s\n", sdio_func_id(func));
900 }
901
902 return err;
903 }
904 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
905 #endif /* CONFIG_SSB_PCMCIAHOST */
906
907 int __devinit ssb_bus_ssbbus_register(struct ssb_bus *bus,
908 unsigned long baseaddr,
909 ssb_invariants_func_t get_invariants)
910 {
911 int err;
912
913 bus->bustype = SSB_BUSTYPE_SSB;
914 bus->ops = &ssb_ssb_ops;
915
916 err = ssb_bus_register(bus, get_invariants, baseaddr);
917 if (!err) {
918 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
919 "address 0x%08lX\n", baseaddr);
920 }
921
922 return err;
923 }
924
925 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
926 {
927 drv->drv.name = drv->name;
928 drv->drv.bus = &ssb_bustype;
929 drv->drv.owner = owner;
930
931 return driver_register(&drv->drv);
932 }
933 EXPORT_SYMBOL(__ssb_driver_register);
934
935 void ssb_driver_unregister(struct ssb_driver *drv)
936 {
937 driver_unregister(&drv->drv);
938 }
939 EXPORT_SYMBOL(ssb_driver_unregister);
940
941 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
942 {
943 struct ssb_bus *bus = dev->bus;
944 struct ssb_device *ent;
945 int i;
946
947 for (i = 0; i < bus->nr_devices; i++) {
948 ent = &(bus->devices[i]);
949 if (ent->id.vendor != dev->id.vendor)
950 continue;
951 if (ent->id.coreid != dev->id.coreid)
952 continue;
953
954 ent->devtypedata = data;
955 }
956 }
957 EXPORT_SYMBOL(ssb_set_devtypedata);
958
959 static u32 clkfactor_f6_resolve(u32 v)
960 {
961 /* map the magic values */
962 switch (v) {
963 case SSB_CHIPCO_CLK_F6_2:
964 return 2;
965 case SSB_CHIPCO_CLK_F6_3:
966 return 3;
967 case SSB_CHIPCO_CLK_F6_4:
968 return 4;
969 case SSB_CHIPCO_CLK_F6_5:
970 return 5;
971 case SSB_CHIPCO_CLK_F6_6:
972 return 6;
973 case SSB_CHIPCO_CLK_F6_7:
974 return 7;
975 }
976 return 0;
977 }
978
979 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
980 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
981 {
982 u32 n1, n2, clock, m1, m2, m3, mc;
983
984 n1 = (n & SSB_CHIPCO_CLK_N1);
985 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
986
987 switch (plltype) {
988 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
989 if (m & SSB_CHIPCO_CLK_T6_MMASK)
990 return SSB_CHIPCO_CLK_T6_M1;
991 return SSB_CHIPCO_CLK_T6_M0;
992 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
993 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
994 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
995 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
996 n1 = clkfactor_f6_resolve(n1);
997 n2 += SSB_CHIPCO_CLK_F5_BIAS;
998 break;
999 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1000 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1001 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1002 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1003 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1004 break;
1005 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1006 return 100000000;
1007 default:
1008 SSB_WARN_ON(1);
1009 }
1010
1011 switch (plltype) {
1012 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1013 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1014 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1015 break;
1016 default:
1017 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1018 }
1019 if (!clock)
1020 return 0;
1021
1022 m1 = (m & SSB_CHIPCO_CLK_M1);
1023 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1024 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1025 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1026
1027 switch (plltype) {
1028 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1029 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1030 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1031 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1032 m1 = clkfactor_f6_resolve(m1);
1033 if ((plltype == SSB_PLLTYPE_1) ||
1034 (plltype == SSB_PLLTYPE_3))
1035 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1036 else
1037 m2 = clkfactor_f6_resolve(m2);
1038 m3 = clkfactor_f6_resolve(m3);
1039
1040 switch (mc) {
1041 case SSB_CHIPCO_CLK_MC_BYPASS:
1042 return clock;
1043 case SSB_CHIPCO_CLK_MC_M1:
1044 return (clock / m1);
1045 case SSB_CHIPCO_CLK_MC_M1M2:
1046 return (clock / (m1 * m2));
1047 case SSB_CHIPCO_CLK_MC_M1M2M3:
1048 return (clock / (m1 * m2 * m3));
1049 case SSB_CHIPCO_CLK_MC_M1M3:
1050 return (clock / (m1 * m3));
1051 }
1052 return 0;
1053 case SSB_PLLTYPE_2:
1054 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1055 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1056 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1057 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1058 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1059 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1060
1061 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1062 clock /= m1;
1063 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1064 clock /= m2;
1065 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1066 clock /= m3;
1067 return clock;
1068 default:
1069 SSB_WARN_ON(1);
1070 }
1071 return 0;
1072 }
1073
1074 /* Get the current speed the backplane is running at */
1075 u32 ssb_clockspeed(struct ssb_bus *bus)
1076 {
1077 u32 rate;
1078 u32 plltype;
1079 u32 clkctl_n, clkctl_m;
1080
1081 if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
1082 return ssb_pmu_get_controlclock(&bus->chipco);
1083
1084 if (ssb_extif_available(&bus->extif))
1085 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1086 &clkctl_n, &clkctl_m);
1087 else if (bus->chipco.dev)
1088 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1089 &clkctl_n, &clkctl_m);
1090 else
1091 return 0;
1092
1093 if (bus->chip_id == 0x5365) {
1094 rate = 100000000;
1095 } else {
1096 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1097 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1098 rate /= 2;
1099 }
1100
1101 return rate;
1102 }
1103 EXPORT_SYMBOL(ssb_clockspeed);
1104
1105 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1106 {
1107 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1108
1109 /* The REJECT bit seems to be different for Backplane rev 2.3 */
1110 switch (rev) {
1111 case SSB_IDLOW_SSBREV_22:
1112 case SSB_IDLOW_SSBREV_24:
1113 case SSB_IDLOW_SSBREV_26:
1114 return SSB_TMSLOW_REJECT;
1115 case SSB_IDLOW_SSBREV_23:
1116 return SSB_TMSLOW_REJECT_23;
1117 case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */
1118 case SSB_IDLOW_SSBREV_27: /* same here */
1119 return SSB_TMSLOW_REJECT; /* this is a guess */
1120 default:
1121 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1122 WARN_ON(1);
1123 }
1124 return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
1125 }
1126
1127 int ssb_device_is_enabled(struct ssb_device *dev)
1128 {
1129 u32 val;
1130 u32 reject;
1131
1132 reject = ssb_tmslow_reject_bitmask(dev);
1133 val = ssb_read32(dev, SSB_TMSLOW);
1134 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1135
1136 return (val == SSB_TMSLOW_CLOCK);
1137 }
1138 EXPORT_SYMBOL(ssb_device_is_enabled);
1139
1140 static void ssb_flush_tmslow(struct ssb_device *dev)
1141 {
1142 /* Make _really_ sure the device has finished the TMSLOW
1143 * register write transaction, as we risk running into
1144 * a machine check exception otherwise.
1145 * Do this by reading the register back to commit the
1146 * PCI write and delay an additional usec for the device
1147 * to react to the change. */
1148 ssb_read32(dev, SSB_TMSLOW);
1149 udelay(1);
1150 }
1151
1152 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1153 {
1154 u32 val;
1155
1156 ssb_device_disable(dev, core_specific_flags);
1157 ssb_write32(dev, SSB_TMSLOW,
1158 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1159 SSB_TMSLOW_FGC | core_specific_flags);
1160 ssb_flush_tmslow(dev);
1161
1162 /* Clear SERR if set. This is a hw bug workaround. */
1163 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1164 ssb_write32(dev, SSB_TMSHIGH, 0);
1165
1166 val = ssb_read32(dev, SSB_IMSTATE);
1167 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1168 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1169 ssb_write32(dev, SSB_IMSTATE, val);
1170 }
1171
1172 ssb_write32(dev, SSB_TMSLOW,
1173 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1174 core_specific_flags);
1175 ssb_flush_tmslow(dev);
1176
1177 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1178 core_specific_flags);
1179 ssb_flush_tmslow(dev);
1180 }
1181 EXPORT_SYMBOL(ssb_device_enable);
1182
1183 /* Wait for bitmask in a register to get set or cleared.
1184 * timeout is in units of ten-microseconds */
1185 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1186 int timeout, int set)
1187 {
1188 int i;
1189 u32 val;
1190
1191 for (i = 0; i < timeout; i++) {
1192 val = ssb_read32(dev, reg);
1193 if (set) {
1194 if ((val & bitmask) == bitmask)
1195 return 0;
1196 } else {
1197 if (!(val & bitmask))
1198 return 0;
1199 }
1200 udelay(10);
1201 }
1202 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1203 "register %04X to %s.\n",
1204 bitmask, reg, (set ? "set" : "clear"));
1205
1206 return -ETIMEDOUT;
1207 }
1208
1209 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1210 {
1211 u32 reject, val;
1212
1213 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1214 return;
1215
1216 reject = ssb_tmslow_reject_bitmask(dev);
1217
1218 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1219 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1220 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1221 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1222
1223 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1224 val = ssb_read32(dev, SSB_IMSTATE);
1225 val |= SSB_IMSTATE_REJECT;
1226 ssb_write32(dev, SSB_IMSTATE, val);
1227 ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1228 0);
1229 }
1230
1231 ssb_write32(dev, SSB_TMSLOW,
1232 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1233 reject | SSB_TMSLOW_RESET |
1234 core_specific_flags);
1235 ssb_flush_tmslow(dev);
1236
1237 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1238 val = ssb_read32(dev, SSB_IMSTATE);
1239 val &= ~SSB_IMSTATE_REJECT;
1240 ssb_write32(dev, SSB_IMSTATE, val);
1241 }
1242 }
1243
1244 ssb_write32(dev, SSB_TMSLOW,
1245 reject | SSB_TMSLOW_RESET |
1246 core_specific_flags);
1247 ssb_flush_tmslow(dev);
1248 }
1249 EXPORT_SYMBOL(ssb_device_disable);
1250
1251 /* Some chipsets need routing known for PCIe and 64-bit DMA */
1252 static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1253 {
1254 u16 chip_id = dev->bus->chip_id;
1255
1256 if (dev->id.coreid == SSB_DEV_80211) {
1257 return (chip_id == 0x4322 || chip_id == 43221 ||
1258 chip_id == 43231 || chip_id == 43222);
1259 }
1260
1261 return 0;
1262 }
1263
1264 u32 ssb_dma_translation(struct ssb_device *dev)
1265 {
1266 switch (dev->bus->bustype) {
1267 case SSB_BUSTYPE_SSB:
1268 return 0;
1269 case SSB_BUSTYPE_PCI:
1270 if (pci_is_pcie(dev->bus->host_pci) &&
1271 ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
1272 return SSB_PCIE_DMA_H32;
1273 } else {
1274 if (ssb_dma_translation_special_bit(dev))
1275 return SSB_PCIE_DMA_H32;
1276 else
1277 return SSB_PCI_DMA;
1278 }
1279 default:
1280 __ssb_dma_not_implemented(dev);
1281 }
1282 return 0;
1283 }
1284 EXPORT_SYMBOL(ssb_dma_translation);
1285
1286 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1287 {
1288 struct ssb_chipcommon *cc;
1289 int err = 0;
1290
1291 /* On buses where more than one core may be working
1292 * at a time, we must not powerdown stuff if there are
1293 * still cores that may want to run. */
1294 if (bus->bustype == SSB_BUSTYPE_SSB)
1295 goto out;
1296
1297 cc = &bus->chipco;
1298
1299 if (!cc->dev)
1300 goto out;
1301 if (cc->dev->id.revision < 5)
1302 goto out;
1303
1304 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1305 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1306 if (err)
1307 goto error;
1308 out:
1309 #ifdef CONFIG_SSB_DEBUG
1310 bus->powered_up = 0;
1311 #endif
1312 return err;
1313 error:
1314 ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1315 goto out;
1316 }
1317 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1318
1319 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1320 {
1321 int err;
1322 enum ssb_clkmode mode;
1323
1324 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1325 if (err)
1326 goto error;
1327
1328 #ifdef CONFIG_SSB_DEBUG
1329 bus->powered_up = 1;
1330 #endif
1331
1332 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1333 ssb_chipco_set_clockmode(&bus->chipco, mode);
1334
1335 return 0;
1336 error:
1337 ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1338 return err;
1339 }
1340 EXPORT_SYMBOL(ssb_bus_powerup);
1341
1342 static void ssb_broadcast_value(struct ssb_device *dev,
1343 u32 address, u32 data)
1344 {
1345 #ifdef CONFIG_SSB_DRIVER_PCICORE
1346 /* This is used for both, PCI and ChipCommon core, so be careful. */
1347 BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1348 BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
1349 #endif
1350
1351 ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1352 ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1353 ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1354 ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
1355 }
1356
1357 void ssb_commit_settings(struct ssb_bus *bus)
1358 {
1359 struct ssb_device *dev;
1360
1361 #ifdef CONFIG_SSB_DRIVER_PCICORE
1362 dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
1363 #else
1364 dev = bus->chipco.dev;
1365 #endif
1366 if (WARN_ON(!dev))
1367 return;
1368 /* This forces an update of the cached registers. */
1369 ssb_broadcast_value(dev, 0xFD8, 0);
1370 }
1371 EXPORT_SYMBOL(ssb_commit_settings);
1372
1373 u32 ssb_admatch_base(u32 adm)
1374 {
1375 u32 base = 0;
1376
1377 switch (adm & SSB_ADM_TYPE) {
1378 case SSB_ADM_TYPE0:
1379 base = (adm & SSB_ADM_BASE0);
1380 break;
1381 case SSB_ADM_TYPE1:
1382 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1383 base = (adm & SSB_ADM_BASE1);
1384 break;
1385 case SSB_ADM_TYPE2:
1386 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1387 base = (adm & SSB_ADM_BASE2);
1388 break;
1389 default:
1390 SSB_WARN_ON(1);
1391 }
1392
1393 return base;
1394 }
1395 EXPORT_SYMBOL(ssb_admatch_base);
1396
1397 u32 ssb_admatch_size(u32 adm)
1398 {
1399 u32 size = 0;
1400
1401 switch (adm & SSB_ADM_TYPE) {
1402 case SSB_ADM_TYPE0:
1403 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1404 break;
1405 case SSB_ADM_TYPE1:
1406 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1407 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1408 break;
1409 case SSB_ADM_TYPE2:
1410 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1411 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1412 break;
1413 default:
1414 SSB_WARN_ON(1);
1415 }
1416 size = (1 << (size + 1));
1417
1418 return size;
1419 }
1420 EXPORT_SYMBOL(ssb_admatch_size);
1421
1422 static int __init ssb_modinit(void)
1423 {
1424 int err;
1425
1426 /* See the comment at the ssb_is_early_boot definition */
1427 ssb_is_early_boot = 0;
1428 err = bus_register(&ssb_bustype);
1429 if (err)
1430 return err;
1431
1432 /* Maybe we already registered some buses at early boot.
1433 * Check for this and attach them
1434 */
1435 ssb_buses_lock();
1436 err = ssb_attach_queued_buses();
1437 ssb_buses_unlock();
1438 if (err) {
1439 bus_unregister(&ssb_bustype);
1440 goto out;
1441 }
1442
1443 err = b43_pci_ssb_bridge_init();
1444 if (err) {
1445 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1446 "initialization failed\n");
1447 /* don't fail SSB init because of this */
1448 err = 0;
1449 }
1450 err = ssb_gige_init();
1451 if (err) {
1452 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1453 "driver initialization failed\n");
1454 /* don't fail SSB init because of this */
1455 err = 0;
1456 }
1457 out:
1458 return err;
1459 }
1460 /* ssb must be initialized after PCI but before the ssb drivers.
1461 * That means we must use some initcall between subsys_initcall
1462 * and device_initcall. */
1463 fs_initcall(ssb_modinit);
1464
1465 static void __exit ssb_modexit(void)
1466 {
1467 ssb_gige_exit();
1468 b43_pci_ssb_bridge_exit();
1469 bus_unregister(&ssb_bustype);
1470 }
1471 module_exit(ssb_modexit)
Linus' kernel tree