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rapidio: add modular build option for the subsystem core
[linux-2.6.git] / drivers / ssb / main.c
blob812775a4bfb6c6a2accfba6549b6d930c5b59fb2
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/platform_device.h>
17 #include <linux/ssb/ssb.h>
18 #include <linux/ssb/ssb_regs.h>
19 #include <linux/ssb/ssb_driver_gige.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/pci.h>
22 #include <linux/mmc/sdio_func.h>
23 #include <linux/slab.h>
24
25 #include <pcmcia/cistpl.h>
26 #include <pcmcia/ds.h>
27
28
29 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
30 MODULE_LICENSE("GPL");
31
32
33 /* Temporary list of yet-to-be-attached buses */
34 static LIST_HEAD(attach_queue);
35 /* List if running buses */
36 static LIST_HEAD(buses);
37 /* Software ID counter */
38 static unsigned int next_busnumber;
39 /* buses_mutes locks the two buslists and the next_busnumber.
40 * Don't lock this directly, but use ssb_buses_[un]lock() below. */
41 static DEFINE_MUTEX(buses_mutex);
42
43 /* There are differences in the codeflow, if the bus is
44 * initialized from early boot, as various needed services
45 * are not available early. This is a mechanism to delay
46 * these initializations to after early boot has finished.
47 * It's also used to avoid mutex locking, as that's not
48 * available and needed early. */
49 static bool ssb_is_early_boot = 1;
50
51 static void ssb_buses_lock(void);
52 static void ssb_buses_unlock(void);
53
54
55 #ifdef CONFIG_SSB_PCIHOST
56 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
57 {
58 struct ssb_bus *bus;
59
60 ssb_buses_lock();
61 list_for_each_entry(bus, &buses, list) {
62 if (bus->bustype == SSB_BUSTYPE_PCI &&
63 bus->host_pci == pdev)
64 goto found;
65 }
66 bus = NULL;
67 found:
68 ssb_buses_unlock();
69
70 return bus;
71 }
72 #endif /* CONFIG_SSB_PCIHOST */
73
74 #ifdef CONFIG_SSB_PCMCIAHOST
75 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
76 {
77 struct ssb_bus *bus;
78
79 ssb_buses_lock();
80 list_for_each_entry(bus, &buses, list) {
81 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
82 bus->host_pcmcia == pdev)
83 goto found;
84 }
85 bus = NULL;
86 found:
87 ssb_buses_unlock();
88
89 return bus;
90 }
91 #endif /* CONFIG_SSB_PCMCIAHOST */
92
93 #ifdef CONFIG_SSB_SDIOHOST
94 struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
95 {
96 struct ssb_bus *bus;
97
98 ssb_buses_lock();
99 list_for_each_entry(bus, &buses, list) {
100 if (bus->bustype == SSB_BUSTYPE_SDIO &&
101 bus->host_sdio == func)
102 goto found;
103 }
104 bus = NULL;
105 found:
106 ssb_buses_unlock();
107
108 return bus;
109 }
110 #endif /* CONFIG_SSB_SDIOHOST */
111
112 int ssb_for_each_bus_call(unsigned long data,
113 int (*func)(struct ssb_bus *bus, unsigned long data))
114 {
115 struct ssb_bus *bus;
116 int res;
117
118 ssb_buses_lock();
119 list_for_each_entry(bus, &buses, list) {
120 res = func(bus, data);
121 if (res >= 0) {
122 ssb_buses_unlock();
123 return res;
124 }
125 }
126 ssb_buses_unlock();
127
128 return -ENODEV;
129 }
130
131 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
132 {
133 if (dev)
134 get_device(dev->dev);
135 return dev;
136 }
137
138 static void ssb_device_put(struct ssb_device *dev)
139 {
140 if (dev)
141 put_device(dev->dev);
142 }
143
144 static int ssb_device_resume(struct device *dev)
145 {
146 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
147 struct ssb_driver *ssb_drv;
148 int err = 0;
149
150 if (dev->driver) {
151 ssb_drv = drv_to_ssb_drv(dev->driver);
152 if (ssb_drv && ssb_drv->resume)
153 err = ssb_drv->resume(ssb_dev);
154 if (err)
155 goto out;
156 }
157 out:
158 return err;
159 }
160
161 static int ssb_device_suspend(struct device *dev, pm_message_t state)
162 {
163 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
164 struct ssb_driver *ssb_drv;
165 int err = 0;
166
167 if (dev->driver) {
168 ssb_drv = drv_to_ssb_drv(dev->driver);
169 if (ssb_drv && ssb_drv->suspend)
170 err = ssb_drv->suspend(ssb_dev, state);
171 if (err)
172 goto out;
173 }
174 out:
175 return err;
176 }
177
178 int ssb_bus_resume(struct ssb_bus *bus)
179 {
180 int err;
181
182 /* Reset HW state information in memory, so that HW is
183 * completely reinitialized. */
184 bus->mapped_device = NULL;
185 #ifdef CONFIG_SSB_DRIVER_PCICORE
186 bus->pcicore.setup_done = 0;
187 #endif
188
189 err = ssb_bus_powerup(bus, 0);
190 if (err)
191 return err;
192 err = ssb_pcmcia_hardware_setup(bus);
193 if (err) {
194 ssb_bus_may_powerdown(bus);
195 return err;
196 }
197 ssb_chipco_resume(&bus->chipco);
198 ssb_bus_may_powerdown(bus);
199
200 return 0;
201 }
202 EXPORT_SYMBOL(ssb_bus_resume);
203
204 int ssb_bus_suspend(struct ssb_bus *bus)
205 {
206 ssb_chipco_suspend(&bus->chipco);
207 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
208
209 return 0;
210 }
211 EXPORT_SYMBOL(ssb_bus_suspend);
212
213 #ifdef CONFIG_SSB_SPROM
214 /** ssb_devices_freeze - Freeze all devices on the bus.
215 *
216 * After freezing no device driver will be handling a device
217 * on this bus anymore. ssb_devices_thaw() must be called after
218 * a successful freeze to reactivate the devices.
219 *
220 * @bus: The bus.
221 * @ctx: Context structure. Pass this to ssb_devices_thaw().
222 */
223 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
224 {
225 struct ssb_device *sdev;
226 struct ssb_driver *sdrv;
227 unsigned int i;
228
229 memset(ctx, 0, sizeof(*ctx));
230 ctx->bus = bus;
231 SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
232
233 for (i = 0; i < bus->nr_devices; i++) {
234 sdev = ssb_device_get(&bus->devices[i]);
235
236 if (!sdev->dev || !sdev->dev->driver ||
237 !device_is_registered(sdev->dev)) {
238 ssb_device_put(sdev);
239 continue;
240 }
241 sdrv = drv_to_ssb_drv(sdev->dev->driver);
242 if (SSB_WARN_ON(!sdrv->remove))
243 continue;
244 sdrv->remove(sdev);
245 ctx->device_frozen[i] = 1;
246 }
247
248 return 0;
249 }
250
251 /** ssb_devices_thaw - Unfreeze all devices on the bus.
252 *
253 * This will re-attach the device drivers and re-init the devices.
254 *
255 * @ctx: The context structure from ssb_devices_freeze()
256 */
257 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
258 {
259 struct ssb_bus *bus = ctx->bus;
260 struct ssb_device *sdev;
261 struct ssb_driver *sdrv;
262 unsigned int i;
263 int err, result = 0;
264
265 for (i = 0; i < bus->nr_devices; i++) {
266 if (!ctx->device_frozen[i])
267 continue;
268 sdev = &bus->devices[i];
269
270 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
271 continue;
272 sdrv = drv_to_ssb_drv(sdev->dev->driver);
273 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
274 continue;
275
276 err = sdrv->probe(sdev, &sdev->id);
277 if (err) {
278 ssb_err("Failed to thaw device %s\n",
279 dev_name(sdev->dev));
280 result = err;
281 }
282 ssb_device_put(sdev);
283 }
284
285 return result;
286 }
287 #endif /* CONFIG_SSB_SPROM */
288
289 static void ssb_device_shutdown(struct device *dev)
290 {
291 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
292 struct ssb_driver *ssb_drv;
293
294 if (!dev->driver)
295 return;
296 ssb_drv = drv_to_ssb_drv(dev->driver);
297 if (ssb_drv && ssb_drv->shutdown)
298 ssb_drv->shutdown(ssb_dev);
299 }
300
301 static int ssb_device_remove(struct device *dev)
302 {
303 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
304 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
305
306 if (ssb_drv && ssb_drv->remove)
307 ssb_drv->remove(ssb_dev);
308 ssb_device_put(ssb_dev);
309
310 return 0;
311 }
312
313 static int ssb_device_probe(struct device *dev)
314 {
315 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
316 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
317 int err = 0;
318
319 ssb_device_get(ssb_dev);
320 if (ssb_drv && ssb_drv->probe)
321 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
322 if (err)
323 ssb_device_put(ssb_dev);
324
325 return err;
326 }
327
328 static int ssb_match_devid(const struct ssb_device_id *tabid,
329 const struct ssb_device_id *devid)
330 {
331 if ((tabid->vendor != devid->vendor) &&
332 tabid->vendor != SSB_ANY_VENDOR)
333 return 0;
334 if ((tabid->coreid != devid->coreid) &&
335 tabid->coreid != SSB_ANY_ID)
336 return 0;
337 if ((tabid->revision != devid->revision) &&
338 tabid->revision != SSB_ANY_REV)
339 return 0;
340 return 1;
341 }
342
343 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
344 {
345 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
346 struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
347 const struct ssb_device_id *id;
348
349 for (id = ssb_drv->id_table;
350 id->vendor || id->coreid || id->revision;
351 id++) {
352 if (ssb_match_devid(id, &ssb_dev->id))
353 return 1; /* found */
354 }
355
356 return 0;
357 }
358
359 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
360 {
361 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
362
363 if (!dev)
364 return -ENODEV;
365
366 return add_uevent_var(env,
367 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
368 ssb_dev->id.vendor, ssb_dev->id.coreid,
369 ssb_dev->id.revision);
370 }
371
372 #define ssb_config_attr(attrib, field, format_string) \
373 static ssize_t \
374 attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
375 { \
376 return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
377 }
378
379 ssb_config_attr(core_num, core_index, "%u\n")
380 ssb_config_attr(coreid, id.coreid, "0x%04x\n")
381 ssb_config_attr(vendor, id.vendor, "0x%04x\n")
382 ssb_config_attr(revision, id.revision, "%u\n")
383 ssb_config_attr(irq, irq, "%u\n")
384 static ssize_t
385 name_show(struct device *dev, struct device_attribute *attr, char *buf)
386 {
387 return sprintf(buf, "%s\n",
388 ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
389 }
390
391 static struct device_attribute ssb_device_attrs[] = {
392 __ATTR_RO(name),
393 __ATTR_RO(core_num),
394 __ATTR_RO(coreid),
395 __ATTR_RO(vendor),
396 __ATTR_RO(revision),
397 __ATTR_RO(irq),
398 __ATTR_NULL,
399 };
400
401 static struct bus_type ssb_bustype = {
402 .name = "ssb",
403 .match = ssb_bus_match,
404 .probe = ssb_device_probe,
405 .remove = ssb_device_remove,
406 .shutdown = ssb_device_shutdown,
407 .suspend = ssb_device_suspend,
408 .resume = ssb_device_resume,
409 .uevent = ssb_device_uevent,
410 .dev_attrs = ssb_device_attrs,
411 };
412
413 static void ssb_buses_lock(void)
414 {
415 /* See the comment at the ssb_is_early_boot definition */
416 if (!ssb_is_early_boot)
417 mutex_lock(&buses_mutex);
418 }
419
420 static void ssb_buses_unlock(void)
421 {
422 /* See the comment at the ssb_is_early_boot definition */
423 if (!ssb_is_early_boot)
424 mutex_unlock(&buses_mutex);
425 }
426
427 static void ssb_devices_unregister(struct ssb_bus *bus)
428 {
429 struct ssb_device *sdev;
430 int i;
431
432 for (i = bus->nr_devices - 1; i >= 0; i--) {
433 sdev = &(bus->devices[i]);
434 if (sdev->dev)
435 device_unregister(sdev->dev);
436 }
437
438 #ifdef CONFIG_SSB_EMBEDDED
439 if (bus->bustype == SSB_BUSTYPE_SSB)
440 platform_device_unregister(bus->watchdog);
441 #endif
442 }
443
444 void ssb_bus_unregister(struct ssb_bus *bus)
445 {
446 int err;
447
448 err = ssb_gpio_unregister(bus);
449 if (err == -EBUSY)
450 ssb_dbg("Some GPIOs are still in use\n");
451 else if (err)
452 ssb_dbg("Can not unregister GPIO driver: %i\n", err);
453
454 ssb_buses_lock();
455 ssb_devices_unregister(bus);
456 list_del(&bus->list);
457 ssb_buses_unlock();
458
459 ssb_pcmcia_exit(bus);
460 ssb_pci_exit(bus);
461 ssb_iounmap(bus);
462 }
463 EXPORT_SYMBOL(ssb_bus_unregister);
464
465 static void ssb_release_dev(struct device *dev)
466 {
467 struct __ssb_dev_wrapper *devwrap;
468
469 devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
470 kfree(devwrap);
471 }
472
473 static int ssb_devices_register(struct ssb_bus *bus)
474 {
475 struct ssb_device *sdev;
476 struct device *dev;
477 struct __ssb_dev_wrapper *devwrap;
478 int i, err = 0;
479 int dev_idx = 0;
480
481 for (i = 0; i < bus->nr_devices; i++) {
482 sdev = &(bus->devices[i]);
483
484 /* We don't register SSB-system devices to the kernel,
485 * as the drivers for them are built into SSB. */
486 switch (sdev->id.coreid) {
487 case SSB_DEV_CHIPCOMMON:
488 case SSB_DEV_PCI:
489 case SSB_DEV_PCIE:
490 case SSB_DEV_PCMCIA:
491 case SSB_DEV_MIPS:
492 case SSB_DEV_MIPS_3302:
493 case SSB_DEV_EXTIF:
494 continue;
495 }
496
497 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
498 if (!devwrap) {
499 ssb_err("Could not allocate device\n");
500 err = -ENOMEM;
501 goto error;
502 }
503 dev = &devwrap->dev;
504 devwrap->sdev = sdev;
505
506 dev->release = ssb_release_dev;
507 dev->bus = &ssb_bustype;
508 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
509
510 switch (bus->bustype) {
511 case SSB_BUSTYPE_PCI:
512 #ifdef CONFIG_SSB_PCIHOST
513 sdev->irq = bus->host_pci->irq;
514 dev->parent = &bus->host_pci->dev;
515 sdev->dma_dev = dev->parent;
516 #endif
517 break;
518 case SSB_BUSTYPE_PCMCIA:
519 #ifdef CONFIG_SSB_PCMCIAHOST
520 sdev->irq = bus->host_pcmcia->irq;
521 dev->parent = &bus->host_pcmcia->dev;
522 #endif
523 break;
524 case SSB_BUSTYPE_SDIO:
525 #ifdef CONFIG_SSB_SDIOHOST
526 dev->parent = &bus->host_sdio->dev;
527 #endif
528 break;
529 case SSB_BUSTYPE_SSB:
530 dev->dma_mask = &dev->coherent_dma_mask;
531 sdev->dma_dev = dev;
532 break;
533 }
534
535 sdev->dev = dev;
536 err = device_register(dev);
537 if (err) {
538 ssb_err("Could not register %s\n", dev_name(dev));
539 /* Set dev to NULL to not unregister
540 * dev on error unwinding. */
541 sdev->dev = NULL;
542 kfree(devwrap);
543 goto error;
544 }
545 dev_idx++;
546 }
547
548 #ifdef CONFIG_SSB_DRIVER_MIPS
549 if (bus->mipscore.pflash.present) {
550 err = platform_device_register(&ssb_pflash_dev);
551 if (err)
552 pr_err("Error registering parallel flash\n");
553 }
554 #endif
555
556 return 0;
557 error:
558 /* Unwind the already registered devices. */
559 ssb_devices_unregister(bus);
560 return err;
561 }
562
563 /* Needs ssb_buses_lock() */
564 static int ssb_attach_queued_buses(void)
565 {
566 struct ssb_bus *bus, *n;
567 int err = 0;
568 int drop_them_all = 0;
569
570 list_for_each_entry_safe(bus, n, &attach_queue, list) {
571 if (drop_them_all) {
572 list_del(&bus->list);
573 continue;
574 }
575 /* Can't init the PCIcore in ssb_bus_register(), as that
576 * is too early in boot for embedded systems
577 * (no udelay() available). So do it here in attach stage.
578 */
579 err = ssb_bus_powerup(bus, 0);
580 if (err)
581 goto error;
582 ssb_pcicore_init(&bus->pcicore);
583 if (bus->bustype == SSB_BUSTYPE_SSB)
584 ssb_watchdog_register(bus);
585 ssb_bus_may_powerdown(bus);
586
587 err = ssb_devices_register(bus);
588 error:
589 if (err) {
590 drop_them_all = 1;
591 list_del(&bus->list);
592 continue;
593 }
594 list_move_tail(&bus->list, &buses);
595 }
596
597 return err;
598 }
599
600 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
601 {
602 struct ssb_bus *bus = dev->bus;
603
604 offset += dev->core_index * SSB_CORE_SIZE;
605 return readb(bus->mmio + offset);
606 }
607
608 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
609 {
610 struct ssb_bus *bus = dev->bus;
611
612 offset += dev->core_index * SSB_CORE_SIZE;
613 return readw(bus->mmio + offset);
614 }
615
616 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
617 {
618 struct ssb_bus *bus = dev->bus;
619
620 offset += dev->core_index * SSB_CORE_SIZE;
621 return readl(bus->mmio + offset);
622 }
623
624 #ifdef CONFIG_SSB_BLOCKIO
625 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
626 size_t count, u16 offset, u8 reg_width)
627 {
628 struct ssb_bus *bus = dev->bus;
629 void __iomem *addr;
630
631 offset += dev->core_index * SSB_CORE_SIZE;
632 addr = bus->mmio + offset;
633
634 switch (reg_width) {
635 case sizeof(u8): {
636 u8 *buf = buffer;
637
638 while (count) {
639 *buf = __raw_readb(addr);
640 buf++;
641 count--;
642 }
643 break;
644 }
645 case sizeof(u16): {
646 __le16 *buf = buffer;
647
648 SSB_WARN_ON(count & 1);
649 while (count) {
650 *buf = (__force __le16)__raw_readw(addr);
651 buf++;
652 count -= 2;
653 }
654 break;
655 }
656 case sizeof(u32): {
657 __le32 *buf = buffer;
658
659 SSB_WARN_ON(count & 3);
660 while (count) {
661 *buf = (__force __le32)__raw_readl(addr);
662 buf++;
663 count -= 4;
664 }
665 break;
666 }
667 default:
668 SSB_WARN_ON(1);
669 }
670 }
671 #endif /* CONFIG_SSB_BLOCKIO */
672
673 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
674 {
675 struct ssb_bus *bus = dev->bus;
676
677 offset += dev->core_index * SSB_CORE_SIZE;
678 writeb(value, bus->mmio + offset);
679 }
680
681 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
682 {
683 struct ssb_bus *bus = dev->bus;
684
685 offset += dev->core_index * SSB_CORE_SIZE;
686 writew(value, bus->mmio + offset);
687 }
688
689 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
690 {
691 struct ssb_bus *bus = dev->bus;
692
693 offset += dev->core_index * SSB_CORE_SIZE;
694 writel(value, bus->mmio + offset);
695 }
696
697 #ifdef CONFIG_SSB_BLOCKIO
698 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
699 size_t count, u16 offset, u8 reg_width)
700 {
701 struct ssb_bus *bus = dev->bus;
702 void __iomem *addr;
703
704 offset += dev->core_index * SSB_CORE_SIZE;
705 addr = bus->mmio + offset;
706
707 switch (reg_width) {
708 case sizeof(u8): {
709 const u8 *buf = buffer;
710
711 while (count) {
712 __raw_writeb(*buf, addr);
713 buf++;
714 count--;
715 }
716 break;
717 }
718 case sizeof(u16): {
719 const __le16 *buf = buffer;
720
721 SSB_WARN_ON(count & 1);
722 while (count) {
723 __raw_writew((__force u16)(*buf), addr);
724 buf++;
725 count -= 2;
726 }
727 break;
728 }
729 case sizeof(u32): {
730 const __le32 *buf = buffer;
731
732 SSB_WARN_ON(count & 3);
733 while (count) {
734 __raw_writel((__force u32)(*buf), addr);
735 buf++;
736 count -= 4;
737 }
738 break;
739 }
740 default:
741 SSB_WARN_ON(1);
742 }
743 }
744 #endif /* CONFIG_SSB_BLOCKIO */
745
746 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
747 static const struct ssb_bus_ops ssb_ssb_ops = {
748 .read8 = ssb_ssb_read8,
749 .read16 = ssb_ssb_read16,
750 .read32 = ssb_ssb_read32,
751 .write8 = ssb_ssb_write8,
752 .write16 = ssb_ssb_write16,
753 .write32 = ssb_ssb_write32,
754 #ifdef CONFIG_SSB_BLOCKIO
755 .block_read = ssb_ssb_block_read,
756 .block_write = ssb_ssb_block_write,
757 #endif
758 };
759
760 static int ssb_fetch_invariants(struct ssb_bus *bus,
761 ssb_invariants_func_t get_invariants)
762 {
763 struct ssb_init_invariants iv;
764 int err;
765
766 memset(&iv, 0, sizeof(iv));
767 err = get_invariants(bus, &iv);
768 if (err)
769 goto out;
770 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
771 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
772 bus->has_cardbus_slot = iv.has_cardbus_slot;
773 out:
774 return err;
775 }
776
777 static int ssb_bus_register(struct ssb_bus *bus,
778 ssb_invariants_func_t get_invariants,
779 unsigned long baseaddr)
780 {
781 int err;
782
783 spin_lock_init(&bus->bar_lock);
784 INIT_LIST_HEAD(&bus->list);
785 #ifdef CONFIG_SSB_EMBEDDED
786 spin_lock_init(&bus->gpio_lock);
787 #endif
788
789 /* Powerup the bus */
790 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
791 if (err)
792 goto out;
793
794 /* Init SDIO-host device (if any), before the scan */
795 err = ssb_sdio_init(bus);
796 if (err)
797 goto err_disable_xtal;
798
799 ssb_buses_lock();
800 bus->busnumber = next_busnumber;
801 /* Scan for devices (cores) */
802 err = ssb_bus_scan(bus, baseaddr);
803 if (err)
804 goto err_sdio_exit;
805
806 /* Init PCI-host device (if any) */
807 err = ssb_pci_init(bus);
808 if (err)
809 goto err_unmap;
810 /* Init PCMCIA-host device (if any) */
811 err = ssb_pcmcia_init(bus);
812 if (err)
813 goto err_pci_exit;
814
815 /* Initialize basic system devices (if available) */
816 err = ssb_bus_powerup(bus, 0);
817 if (err)
818 goto err_pcmcia_exit;
819 ssb_chipcommon_init(&bus->chipco);
820 ssb_extif_init(&bus->extif);
821 ssb_mipscore_init(&bus->mipscore);
822 err = ssb_gpio_init(bus);
823 if (err == -ENOTSUPP)
824 ssb_dbg("GPIO driver not activated\n");
825 else if (err)
826 ssb_dbg("Error registering GPIO driver: %i\n", err);
827 err = ssb_fetch_invariants(bus, get_invariants);
828 if (err) {
829 ssb_bus_may_powerdown(bus);
830 goto err_pcmcia_exit;
831 }
832 ssb_bus_may_powerdown(bus);
833
834 /* Queue it for attach.
835 * See the comment at the ssb_is_early_boot definition. */
836 list_add_tail(&bus->list, &attach_queue);
837 if (!ssb_is_early_boot) {
838 /* This is not early boot, so we must attach the bus now */
839 err = ssb_attach_queued_buses();
840 if (err)
841 goto err_dequeue;
842 }
843 next_busnumber++;
844 ssb_buses_unlock();
845
846 out:
847 return err;
848
849 err_dequeue:
850 list_del(&bus->list);
851 err_pcmcia_exit:
852 ssb_pcmcia_exit(bus);
853 err_pci_exit:
854 ssb_pci_exit(bus);
855 err_unmap:
856 ssb_iounmap(bus);
857 err_sdio_exit:
858 ssb_sdio_exit(bus);
859 err_disable_xtal:
860 ssb_buses_unlock();
861 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
862 return err;
863 }
864
865 #ifdef CONFIG_SSB_PCIHOST
866 int ssb_bus_pcibus_register(struct ssb_bus *bus, struct pci_dev *host_pci)
867 {
868 int err;
869
870 bus->bustype = SSB_BUSTYPE_PCI;
871 bus->host_pci = host_pci;
872 bus->ops = &ssb_pci_ops;
873
874 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
875 if (!err) {
876 ssb_info("Sonics Silicon Backplane found on PCI device %s\n",
877 dev_name(&host_pci->dev));
878 } else {
879 ssb_err("Failed to register PCI version of SSB with error %d\n",
880 err);
881 }
882
883 return err;
884 }
885 EXPORT_SYMBOL(ssb_bus_pcibus_register);
886 #endif /* CONFIG_SSB_PCIHOST */
887
888 #ifdef CONFIG_SSB_PCMCIAHOST
889 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
890 struct pcmcia_device *pcmcia_dev,
891 unsigned long baseaddr)
892 {
893 int err;
894
895 bus->bustype = SSB_BUSTYPE_PCMCIA;
896 bus->host_pcmcia = pcmcia_dev;
897 bus->ops = &ssb_pcmcia_ops;
898
899 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
900 if (!err) {
901 ssb_info("Sonics Silicon Backplane found on PCMCIA device %s\n",
902 pcmcia_dev->devname);
903 }
904
905 return err;
906 }
907 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
908 #endif /* CONFIG_SSB_PCMCIAHOST */
909
910 #ifdef CONFIG_SSB_SDIOHOST
911 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
912 unsigned int quirks)
913 {
914 int err;
915
916 bus->bustype = SSB_BUSTYPE_SDIO;
917 bus->host_sdio = func;
918 bus->ops = &ssb_sdio_ops;
919 bus->quirks = quirks;
920
921 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
922 if (!err) {
923 ssb_info("Sonics Silicon Backplane found on SDIO device %s\n",
924 sdio_func_id(func));
925 }
926
927 return err;
928 }
929 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
930 #endif /* CONFIG_SSB_PCMCIAHOST */
931
932 int ssb_bus_ssbbus_register(struct ssb_bus *bus, unsigned long baseaddr,
933 ssb_invariants_func_t get_invariants)
934 {
935 int err;
936
937 bus->bustype = SSB_BUSTYPE_SSB;
938 bus->ops = &ssb_ssb_ops;
939
940 err = ssb_bus_register(bus, get_invariants, baseaddr);
941 if (!err) {
942 ssb_info("Sonics Silicon Backplane found at address 0x%08lX\n",
943 baseaddr);
944 }
945
946 return err;
947 }
948
949 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
950 {
951 drv->drv.name = drv->name;
952 drv->drv.bus = &ssb_bustype;
953 drv->drv.owner = owner;
954
955 return driver_register(&drv->drv);
956 }
957 EXPORT_SYMBOL(__ssb_driver_register);
958
959 void ssb_driver_unregister(struct ssb_driver *drv)
960 {
961 driver_unregister(&drv->drv);
962 }
963 EXPORT_SYMBOL(ssb_driver_unregister);
964
965 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
966 {
967 struct ssb_bus *bus = dev->bus;
968 struct ssb_device *ent;
969 int i;
970
971 for (i = 0; i < bus->nr_devices; i++) {
972 ent = &(bus->devices[i]);
973 if (ent->id.vendor != dev->id.vendor)
974 continue;
975 if (ent->id.coreid != dev->id.coreid)
976 continue;
977
978 ent->devtypedata = data;
979 }
980 }
981 EXPORT_SYMBOL(ssb_set_devtypedata);
982
983 static u32 clkfactor_f6_resolve(u32 v)
984 {
985 /* map the magic values */
986 switch (v) {
987 case SSB_CHIPCO_CLK_F6_2:
988 return 2;
989 case SSB_CHIPCO_CLK_F6_3:
990 return 3;
991 case SSB_CHIPCO_CLK_F6_4:
992 return 4;
993 case SSB_CHIPCO_CLK_F6_5:
994 return 5;
995 case SSB_CHIPCO_CLK_F6_6:
996 return 6;
997 case SSB_CHIPCO_CLK_F6_7:
998 return 7;
999 }
1000 return 0;
1001 }
1002
1003 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
1004 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
1005 {
1006 u32 n1, n2, clock, m1, m2, m3, mc;
1007
1008 n1 = (n & SSB_CHIPCO_CLK_N1);
1009 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
1010
1011 switch (plltype) {
1012 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
1013 if (m & SSB_CHIPCO_CLK_T6_MMASK)
1014 return SSB_CHIPCO_CLK_T6_M1;
1015 return SSB_CHIPCO_CLK_T6_M0;
1016 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1017 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1018 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1019 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1020 n1 = clkfactor_f6_resolve(n1);
1021 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1022 break;
1023 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1024 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1025 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1026 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1027 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1028 break;
1029 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1030 return 100000000;
1031 default:
1032 SSB_WARN_ON(1);
1033 }
1034
1035 switch (plltype) {
1036 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1037 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1038 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1039 break;
1040 default:
1041 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1042 }
1043 if (!clock)
1044 return 0;
1045
1046 m1 = (m & SSB_CHIPCO_CLK_M1);
1047 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1048 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1049 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1050
1051 switch (plltype) {
1052 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1053 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1054 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1055 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1056 m1 = clkfactor_f6_resolve(m1);
1057 if ((plltype == SSB_PLLTYPE_1) ||
1058 (plltype == SSB_PLLTYPE_3))
1059 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1060 else
1061 m2 = clkfactor_f6_resolve(m2);
1062 m3 = clkfactor_f6_resolve(m3);
1063
1064 switch (mc) {
1065 case SSB_CHIPCO_CLK_MC_BYPASS:
1066 return clock;
1067 case SSB_CHIPCO_CLK_MC_M1:
1068 return (clock / m1);
1069 case SSB_CHIPCO_CLK_MC_M1M2:
1070 return (clock / (m1 * m2));
1071 case SSB_CHIPCO_CLK_MC_M1M2M3:
1072 return (clock / (m1 * m2 * m3));
1073 case SSB_CHIPCO_CLK_MC_M1M3:
1074 return (clock / (m1 * m3));
1075 }
1076 return 0;
1077 case SSB_PLLTYPE_2:
1078 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1079 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1080 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1081 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1082 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1083 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1084
1085 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1086 clock /= m1;
1087 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1088 clock /= m2;
1089 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1090 clock /= m3;
1091 return clock;
1092 default:
1093 SSB_WARN_ON(1);
1094 }
1095 return 0;
1096 }
1097
1098 /* Get the current speed the backplane is running at */
1099 u32 ssb_clockspeed(struct ssb_bus *bus)
1100 {
1101 u32 rate;
1102 u32 plltype;
1103 u32 clkctl_n, clkctl_m;
1104
1105 if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
1106 return ssb_pmu_get_controlclock(&bus->chipco);
1107
1108 if (ssb_extif_available(&bus->extif))
1109 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1110 &clkctl_n, &clkctl_m);
1111 else if (bus->chipco.dev)
1112 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1113 &clkctl_n, &clkctl_m);
1114 else
1115 return 0;
1116
1117 if (bus->chip_id == 0x5365) {
1118 rate = 100000000;
1119 } else {
1120 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1121 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1122 rate /= 2;
1123 }
1124
1125 return rate;
1126 }
1127 EXPORT_SYMBOL(ssb_clockspeed);
1128
1129 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1130 {
1131 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1132
1133 /* The REJECT bit seems to be different for Backplane rev 2.3 */
1134 switch (rev) {
1135 case SSB_IDLOW_SSBREV_22:
1136 case SSB_IDLOW_SSBREV_24:
1137 case SSB_IDLOW_SSBREV_26:
1138 return SSB_TMSLOW_REJECT;
1139 case SSB_IDLOW_SSBREV_23:
1140 return SSB_TMSLOW_REJECT_23;
1141 case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */
1142 case SSB_IDLOW_SSBREV_27: /* same here */
1143 return SSB_TMSLOW_REJECT; /* this is a guess */
1144 default:
1145 WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1146 }
1147 return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
1148 }
1149
1150 int ssb_device_is_enabled(struct ssb_device *dev)
1151 {
1152 u32 val;
1153 u32 reject;
1154
1155 reject = ssb_tmslow_reject_bitmask(dev);
1156 val = ssb_read32(dev, SSB_TMSLOW);
1157 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1158
1159 return (val == SSB_TMSLOW_CLOCK);
1160 }
1161 EXPORT_SYMBOL(ssb_device_is_enabled);
1162
1163 static void ssb_flush_tmslow(struct ssb_device *dev)
1164 {
1165 /* Make _really_ sure the device has finished the TMSLOW
1166 * register write transaction, as we risk running into
1167 * a machine check exception otherwise.
1168 * Do this by reading the register back to commit the
1169 * PCI write and delay an additional usec for the device
1170 * to react to the change. */
1171 ssb_read32(dev, SSB_TMSLOW);
1172 udelay(1);
1173 }
1174
1175 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1176 {
1177 u32 val;
1178
1179 ssb_device_disable(dev, core_specific_flags);
1180 ssb_write32(dev, SSB_TMSLOW,
1181 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1182 SSB_TMSLOW_FGC | core_specific_flags);
1183 ssb_flush_tmslow(dev);
1184
1185 /* Clear SERR if set. This is a hw bug workaround. */
1186 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1187 ssb_write32(dev, SSB_TMSHIGH, 0);
1188
1189 val = ssb_read32(dev, SSB_IMSTATE);
1190 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1191 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1192 ssb_write32(dev, SSB_IMSTATE, val);
1193 }
1194
1195 ssb_write32(dev, SSB_TMSLOW,
1196 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1197 core_specific_flags);
1198 ssb_flush_tmslow(dev);
1199
1200 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1201 core_specific_flags);
1202 ssb_flush_tmslow(dev);
1203 }
1204 EXPORT_SYMBOL(ssb_device_enable);
1205
1206 /* Wait for bitmask in a register to get set or cleared.
1207 * timeout is in units of ten-microseconds */
1208 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1209 int timeout, int set)
1210 {
1211 int i;
1212 u32 val;
1213
1214 for (i = 0; i < timeout; i++) {
1215 val = ssb_read32(dev, reg);
1216 if (set) {
1217 if ((val & bitmask) == bitmask)
1218 return 0;
1219 } else {
1220 if (!(val & bitmask))
1221 return 0;
1222 }
1223 udelay(10);
1224 }
1225 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1226 "register %04X to %s.\n",
1227 bitmask, reg, (set ? "set" : "clear"));
1228
1229 return -ETIMEDOUT;
1230 }
1231
1232 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1233 {
1234 u32 reject, val;
1235
1236 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1237 return;
1238
1239 reject = ssb_tmslow_reject_bitmask(dev);
1240
1241 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1242 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1243 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1244 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1245
1246 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1247 val = ssb_read32(dev, SSB_IMSTATE);
1248 val |= SSB_IMSTATE_REJECT;
1249 ssb_write32(dev, SSB_IMSTATE, val);
1250 ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1251 0);
1252 }
1253
1254 ssb_write32(dev, SSB_TMSLOW,
1255 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1256 reject | SSB_TMSLOW_RESET |
1257 core_specific_flags);
1258 ssb_flush_tmslow(dev);
1259
1260 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1261 val = ssb_read32(dev, SSB_IMSTATE);
1262 val &= ~SSB_IMSTATE_REJECT;
1263 ssb_write32(dev, SSB_IMSTATE, val);
1264 }
1265 }
1266
1267 ssb_write32(dev, SSB_TMSLOW,
1268 reject | SSB_TMSLOW_RESET |
1269 core_specific_flags);
1270 ssb_flush_tmslow(dev);
1271 }
1272 EXPORT_SYMBOL(ssb_device_disable);
1273
1274 /* Some chipsets need routing known for PCIe and 64-bit DMA */
1275 static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1276 {
1277 u16 chip_id = dev->bus->chip_id;
1278
1279 if (dev->id.coreid == SSB_DEV_80211) {
1280 return (chip_id == 0x4322 || chip_id == 43221 ||
1281 chip_id == 43231 || chip_id == 43222);
1282 }
1283
1284 return 0;
1285 }
1286
1287 u32 ssb_dma_translation(struct ssb_device *dev)
1288 {
1289 switch (dev->bus->bustype) {
1290 case SSB_BUSTYPE_SSB:
1291 return 0;
1292 case SSB_BUSTYPE_PCI:
1293 if (pci_is_pcie(dev->bus->host_pci) &&
1294 ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
1295 return SSB_PCIE_DMA_H32;
1296 } else {
1297 if (ssb_dma_translation_special_bit(dev))
1298 return SSB_PCIE_DMA_H32;
1299 else
1300 return SSB_PCI_DMA;
1301 }
1302 default:
1303 __ssb_dma_not_implemented(dev);
1304 }
1305 return 0;
1306 }
1307 EXPORT_SYMBOL(ssb_dma_translation);
1308
1309 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1310 {
1311 struct ssb_chipcommon *cc;
1312 int err = 0;
1313
1314 /* On buses where more than one core may be working
1315 * at a time, we must not powerdown stuff if there are
1316 * still cores that may want to run. */
1317 if (bus->bustype == SSB_BUSTYPE_SSB)
1318 goto out;
1319
1320 cc = &bus->chipco;
1321
1322 if (!cc->dev)
1323 goto out;
1324 if (cc->dev->id.revision < 5)
1325 goto out;
1326
1327 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1328 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1329 if (err)
1330 goto error;
1331 out:
1332 #ifdef CONFIG_SSB_DEBUG
1333 bus->powered_up = 0;
1334 #endif
1335 return err;
1336 error:
1337 ssb_err("Bus powerdown failed\n");
1338 goto out;
1339 }
1340 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1341
1342 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1343 {
1344 int err;
1345 enum ssb_clkmode mode;
1346
1347 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1348 if (err)
1349 goto error;
1350
1351 #ifdef CONFIG_SSB_DEBUG
1352 bus->powered_up = 1;
1353 #endif
1354
1355 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1356 ssb_chipco_set_clockmode(&bus->chipco, mode);
1357
1358 return 0;
1359 error:
1360 ssb_err("Bus powerup failed\n");
1361 return err;
1362 }
1363 EXPORT_SYMBOL(ssb_bus_powerup);
1364
1365 static void ssb_broadcast_value(struct ssb_device *dev,
1366 u32 address, u32 data)
1367 {
1368 #ifdef CONFIG_SSB_DRIVER_PCICORE
1369 /* This is used for both, PCI and ChipCommon core, so be careful. */
1370 BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1371 BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
1372 #endif
1373
1374 ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1375 ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1376 ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1377 ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
1378 }
1379
1380 void ssb_commit_settings(struct ssb_bus *bus)
1381 {
1382 struct ssb_device *dev;
1383
1384 #ifdef CONFIG_SSB_DRIVER_PCICORE
1385 dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
1386 #else
1387 dev = bus->chipco.dev;
1388 #endif
1389 if (WARN_ON(!dev))
1390 return;
1391 /* This forces an update of the cached registers. */
1392 ssb_broadcast_value(dev, 0xFD8, 0);
1393 }
1394 EXPORT_SYMBOL(ssb_commit_settings);
1395
1396 u32 ssb_admatch_base(u32 adm)
1397 {
1398 u32 base = 0;
1399
1400 switch (adm & SSB_ADM_TYPE) {
1401 case SSB_ADM_TYPE0:
1402 base = (adm & SSB_ADM_BASE0);
1403 break;
1404 case SSB_ADM_TYPE1:
1405 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1406 base = (adm & SSB_ADM_BASE1);
1407 break;
1408 case SSB_ADM_TYPE2:
1409 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1410 base = (adm & SSB_ADM_BASE2);
1411 break;
1412 default:
1413 SSB_WARN_ON(1);
1414 }
1415
1416 return base;
1417 }
1418 EXPORT_SYMBOL(ssb_admatch_base);
1419
1420 u32 ssb_admatch_size(u32 adm)
1421 {
1422 u32 size = 0;
1423
1424 switch (adm & SSB_ADM_TYPE) {
1425 case SSB_ADM_TYPE0:
1426 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1427 break;
1428 case SSB_ADM_TYPE1:
1429 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1430 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1431 break;
1432 case SSB_ADM_TYPE2:
1433 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1434 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1435 break;
1436 default:
1437 SSB_WARN_ON(1);
1438 }
1439 size = (1 << (size + 1));
1440
1441 return size;
1442 }
1443 EXPORT_SYMBOL(ssb_admatch_size);
1444
1445 static int __init ssb_modinit(void)
1446 {
1447 int err;
1448
1449 /* See the comment at the ssb_is_early_boot definition */
1450 ssb_is_early_boot = 0;
1451 err = bus_register(&ssb_bustype);
1452 if (err)
1453 return err;
1454
1455 /* Maybe we already registered some buses at early boot.
1456 * Check for this and attach them
1457 */
1458 ssb_buses_lock();
1459 err = ssb_attach_queued_buses();
1460 ssb_buses_unlock();
1461 if (err) {
1462 bus_unregister(&ssb_bustype);
1463 goto out;
1464 }
1465
1466 err = b43_pci_ssb_bridge_init();
1467 if (err) {
1468 ssb_err("Broadcom 43xx PCI-SSB-bridge initialization failed\n");
1469 /* don't fail SSB init because of this */
1470 err = 0;
1471 }
1472 err = ssb_gige_init();
1473 if (err) {
1474 ssb_err("SSB Broadcom Gigabit Ethernet driver initialization failed\n");
1475 /* don't fail SSB init because of this */
1476 err = 0;
1477 }
1478 out:
1479 return err;
1480 }
1481 /* ssb must be initialized after PCI but before the ssb drivers.
1482 * That means we must use some initcall between subsys_initcall
1483 * and device_initcall. */
1484 fs_initcall(ssb_modinit);
1485
1486 static void __exit ssb_modexit(void)
1487 {
1488 ssb_gige_exit();
1489 b43_pci_ssb_bridge_exit();
1490 bus_unregister(&ssb_bustype);
1491 }
1492 module_exit(ssb_modexit)
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