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Merge tag 'gpio-for-v3.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6.git] / drivers / ssb / main.c
blobe55ddf7cd7c2c42274145051c16760da800ad5ee
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 #ifdef CONFIG_SSB_SFLASH
557 if (bus->mipscore.sflash.present) {
558 err = platform_device_register(&ssb_sflash_dev);
559 if (err)
560 pr_err("Error registering serial flash\n");
561 }
562 #endif
563
564 return 0;
565 error:
566 /* Unwind the already registered devices. */
567 ssb_devices_unregister(bus);
568 return err;
569 }
570
571 /* Needs ssb_buses_lock() */
572 static int ssb_attach_queued_buses(void)
573 {
574 struct ssb_bus *bus, *n;
575 int err = 0;
576 int drop_them_all = 0;
577
578 list_for_each_entry_safe(bus, n, &attach_queue, list) {
579 if (drop_them_all) {
580 list_del(&bus->list);
581 continue;
582 }
583 /* Can't init the PCIcore in ssb_bus_register(), as that
584 * is too early in boot for embedded systems
585 * (no udelay() available). So do it here in attach stage.
586 */
587 err = ssb_bus_powerup(bus, 0);
588 if (err)
589 goto error;
590 ssb_pcicore_init(&bus->pcicore);
591 if (bus->bustype == SSB_BUSTYPE_SSB)
592 ssb_watchdog_register(bus);
593 ssb_bus_may_powerdown(bus);
594
595 err = ssb_devices_register(bus);
596 error:
597 if (err) {
598 drop_them_all = 1;
599 list_del(&bus->list);
600 continue;
601 }
602 list_move_tail(&bus->list, &buses);
603 }
604
605 return err;
606 }
607
608 static u8 ssb_ssb_read8(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 readb(bus->mmio + offset);
614 }
615
616 static u16 ssb_ssb_read16(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 readw(bus->mmio + offset);
622 }
623
624 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
625 {
626 struct ssb_bus *bus = dev->bus;
627
628 offset += dev->core_index * SSB_CORE_SIZE;
629 return readl(bus->mmio + offset);
630 }
631
632 #ifdef CONFIG_SSB_BLOCKIO
633 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
634 size_t count, u16 offset, u8 reg_width)
635 {
636 struct ssb_bus *bus = dev->bus;
637 void __iomem *addr;
638
639 offset += dev->core_index * SSB_CORE_SIZE;
640 addr = bus->mmio + offset;
641
642 switch (reg_width) {
643 case sizeof(u8): {
644 u8 *buf = buffer;
645
646 while (count) {
647 *buf = __raw_readb(addr);
648 buf++;
649 count--;
650 }
651 break;
652 }
653 case sizeof(u16): {
654 __le16 *buf = buffer;
655
656 SSB_WARN_ON(count & 1);
657 while (count) {
658 *buf = (__force __le16)__raw_readw(addr);
659 buf++;
660 count -= 2;
661 }
662 break;
663 }
664 case sizeof(u32): {
665 __le32 *buf = buffer;
666
667 SSB_WARN_ON(count & 3);
668 while (count) {
669 *buf = (__force __le32)__raw_readl(addr);
670 buf++;
671 count -= 4;
672 }
673 break;
674 }
675 default:
676 SSB_WARN_ON(1);
677 }
678 }
679 #endif /* CONFIG_SSB_BLOCKIO */
680
681 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
682 {
683 struct ssb_bus *bus = dev->bus;
684
685 offset += dev->core_index * SSB_CORE_SIZE;
686 writeb(value, bus->mmio + offset);
687 }
688
689 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
690 {
691 struct ssb_bus *bus = dev->bus;
692
693 offset += dev->core_index * SSB_CORE_SIZE;
694 writew(value, bus->mmio + offset);
695 }
696
697 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
698 {
699 struct ssb_bus *bus = dev->bus;
700
701 offset += dev->core_index * SSB_CORE_SIZE;
702 writel(value, bus->mmio + offset);
703 }
704
705 #ifdef CONFIG_SSB_BLOCKIO
706 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
707 size_t count, u16 offset, u8 reg_width)
708 {
709 struct ssb_bus *bus = dev->bus;
710 void __iomem *addr;
711
712 offset += dev->core_index * SSB_CORE_SIZE;
713 addr = bus->mmio + offset;
714
715 switch (reg_width) {
716 case sizeof(u8): {
717 const u8 *buf = buffer;
718
719 while (count) {
720 __raw_writeb(*buf, addr);
721 buf++;
722 count--;
723 }
724 break;
725 }
726 case sizeof(u16): {
727 const __le16 *buf = buffer;
728
729 SSB_WARN_ON(count & 1);
730 while (count) {
731 __raw_writew((__force u16)(*buf), addr);
732 buf++;
733 count -= 2;
734 }
735 break;
736 }
737 case sizeof(u32): {
738 const __le32 *buf = buffer;
739
740 SSB_WARN_ON(count & 3);
741 while (count) {
742 __raw_writel((__force u32)(*buf), addr);
743 buf++;
744 count -= 4;
745 }
746 break;
747 }
748 default:
749 SSB_WARN_ON(1);
750 }
751 }
752 #endif /* CONFIG_SSB_BLOCKIO */
753
754 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
755 static const struct ssb_bus_ops ssb_ssb_ops = {
756 .read8 = ssb_ssb_read8,
757 .read16 = ssb_ssb_read16,
758 .read32 = ssb_ssb_read32,
759 .write8 = ssb_ssb_write8,
760 .write16 = ssb_ssb_write16,
761 .write32 = ssb_ssb_write32,
762 #ifdef CONFIG_SSB_BLOCKIO
763 .block_read = ssb_ssb_block_read,
764 .block_write = ssb_ssb_block_write,
765 #endif
766 };
767
768 static int ssb_fetch_invariants(struct ssb_bus *bus,
769 ssb_invariants_func_t get_invariants)
770 {
771 struct ssb_init_invariants iv;
772 int err;
773
774 memset(&iv, 0, sizeof(iv));
775 err = get_invariants(bus, &iv);
776 if (err)
777 goto out;
778 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
779 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
780 bus->has_cardbus_slot = iv.has_cardbus_slot;
781 out:
782 return err;
783 }
784
785 static int ssb_bus_register(struct ssb_bus *bus,
786 ssb_invariants_func_t get_invariants,
787 unsigned long baseaddr)
788 {
789 int err;
790
791 spin_lock_init(&bus->bar_lock);
792 INIT_LIST_HEAD(&bus->list);
793 #ifdef CONFIG_SSB_EMBEDDED
794 spin_lock_init(&bus->gpio_lock);
795 #endif
796
797 /* Powerup the bus */
798 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
799 if (err)
800 goto out;
801
802 /* Init SDIO-host device (if any), before the scan */
803 err = ssb_sdio_init(bus);
804 if (err)
805 goto err_disable_xtal;
806
807 ssb_buses_lock();
808 bus->busnumber = next_busnumber;
809 /* Scan for devices (cores) */
810 err = ssb_bus_scan(bus, baseaddr);
811 if (err)
812 goto err_sdio_exit;
813
814 /* Init PCI-host device (if any) */
815 err = ssb_pci_init(bus);
816 if (err)
817 goto err_unmap;
818 /* Init PCMCIA-host device (if any) */
819 err = ssb_pcmcia_init(bus);
820 if (err)
821 goto err_pci_exit;
822
823 /* Initialize basic system devices (if available) */
824 err = ssb_bus_powerup(bus, 0);
825 if (err)
826 goto err_pcmcia_exit;
827 ssb_chipcommon_init(&bus->chipco);
828 ssb_extif_init(&bus->extif);
829 ssb_mipscore_init(&bus->mipscore);
830 err = ssb_gpio_init(bus);
831 if (err == -ENOTSUPP)
832 ssb_dbg("GPIO driver not activated\n");
833 else if (err)
834 ssb_dbg("Error registering GPIO driver: %i\n", err);
835 err = ssb_fetch_invariants(bus, get_invariants);
836 if (err) {
837 ssb_bus_may_powerdown(bus);
838 goto err_pcmcia_exit;
839 }
840 ssb_bus_may_powerdown(bus);
841
842 /* Queue it for attach.
843 * See the comment at the ssb_is_early_boot definition. */
844 list_add_tail(&bus->list, &attach_queue);
845 if (!ssb_is_early_boot) {
846 /* This is not early boot, so we must attach the bus now */
847 err = ssb_attach_queued_buses();
848 if (err)
849 goto err_dequeue;
850 }
851 next_busnumber++;
852 ssb_buses_unlock();
853
854 out:
855 return err;
856
857 err_dequeue:
858 list_del(&bus->list);
859 err_pcmcia_exit:
860 ssb_pcmcia_exit(bus);
861 err_pci_exit:
862 ssb_pci_exit(bus);
863 err_unmap:
864 ssb_iounmap(bus);
865 err_sdio_exit:
866 ssb_sdio_exit(bus);
867 err_disable_xtal:
868 ssb_buses_unlock();
869 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
870 return err;
871 }
872
873 #ifdef CONFIG_SSB_PCIHOST
874 int ssb_bus_pcibus_register(struct ssb_bus *bus, struct pci_dev *host_pci)
875 {
876 int err;
877
878 bus->bustype = SSB_BUSTYPE_PCI;
879 bus->host_pci = host_pci;
880 bus->ops = &ssb_pci_ops;
881
882 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
883 if (!err) {
884 ssb_info("Sonics Silicon Backplane found on PCI device %s\n",
885 dev_name(&host_pci->dev));
886 } else {
887 ssb_err("Failed to register PCI version of SSB with error %d\n",
888 err);
889 }
890
891 return err;
892 }
893 EXPORT_SYMBOL(ssb_bus_pcibus_register);
894 #endif /* CONFIG_SSB_PCIHOST */
895
896 #ifdef CONFIG_SSB_PCMCIAHOST
897 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
898 struct pcmcia_device *pcmcia_dev,
899 unsigned long baseaddr)
900 {
901 int err;
902
903 bus->bustype = SSB_BUSTYPE_PCMCIA;
904 bus->host_pcmcia = pcmcia_dev;
905 bus->ops = &ssb_pcmcia_ops;
906
907 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
908 if (!err) {
909 ssb_info("Sonics Silicon Backplane found on PCMCIA device %s\n",
910 pcmcia_dev->devname);
911 }
912
913 return err;
914 }
915 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
916 #endif /* CONFIG_SSB_PCMCIAHOST */
917
918 #ifdef CONFIG_SSB_SDIOHOST
919 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
920 unsigned int quirks)
921 {
922 int err;
923
924 bus->bustype = SSB_BUSTYPE_SDIO;
925 bus->host_sdio = func;
926 bus->ops = &ssb_sdio_ops;
927 bus->quirks = quirks;
928
929 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
930 if (!err) {
931 ssb_info("Sonics Silicon Backplane found on SDIO device %s\n",
932 sdio_func_id(func));
933 }
934
935 return err;
936 }
937 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
938 #endif /* CONFIG_SSB_PCMCIAHOST */
939
940 int ssb_bus_ssbbus_register(struct ssb_bus *bus, unsigned long baseaddr,
941 ssb_invariants_func_t get_invariants)
942 {
943 int err;
944
945 bus->bustype = SSB_BUSTYPE_SSB;
946 bus->ops = &ssb_ssb_ops;
947
948 err = ssb_bus_register(bus, get_invariants, baseaddr);
949 if (!err) {
950 ssb_info("Sonics Silicon Backplane found at address 0x%08lX\n",
951 baseaddr);
952 }
953
954 return err;
955 }
956
957 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
958 {
959 drv->drv.name = drv->name;
960 drv->drv.bus = &ssb_bustype;
961 drv->drv.owner = owner;
962
963 return driver_register(&drv->drv);
964 }
965 EXPORT_SYMBOL(__ssb_driver_register);
966
967 void ssb_driver_unregister(struct ssb_driver *drv)
968 {
969 driver_unregister(&drv->drv);
970 }
971 EXPORT_SYMBOL(ssb_driver_unregister);
972
973 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
974 {
975 struct ssb_bus *bus = dev->bus;
976 struct ssb_device *ent;
977 int i;
978
979 for (i = 0; i < bus->nr_devices; i++) {
980 ent = &(bus->devices[i]);
981 if (ent->id.vendor != dev->id.vendor)
982 continue;
983 if (ent->id.coreid != dev->id.coreid)
984 continue;
985
986 ent->devtypedata = data;
987 }
988 }
989 EXPORT_SYMBOL(ssb_set_devtypedata);
990
991 static u32 clkfactor_f6_resolve(u32 v)
992 {
993 /* map the magic values */
994 switch (v) {
995 case SSB_CHIPCO_CLK_F6_2:
996 return 2;
997 case SSB_CHIPCO_CLK_F6_3:
998 return 3;
999 case SSB_CHIPCO_CLK_F6_4:
1000 return 4;
1001 case SSB_CHIPCO_CLK_F6_5:
1002 return 5;
1003 case SSB_CHIPCO_CLK_F6_6:
1004 return 6;
1005 case SSB_CHIPCO_CLK_F6_7:
1006 return 7;
1007 }
1008 return 0;
1009 }
1010
1011 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
1012 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
1013 {
1014 u32 n1, n2, clock, m1, m2, m3, mc;
1015
1016 n1 = (n & SSB_CHIPCO_CLK_N1);
1017 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
1018
1019 switch (plltype) {
1020 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
1021 if (m & SSB_CHIPCO_CLK_T6_MMASK)
1022 return SSB_CHIPCO_CLK_T6_M1;
1023 return SSB_CHIPCO_CLK_T6_M0;
1024 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1025 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1026 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1027 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1028 n1 = clkfactor_f6_resolve(n1);
1029 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1030 break;
1031 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1032 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1033 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1034 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1035 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1036 break;
1037 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1038 return 100000000;
1039 default:
1040 SSB_WARN_ON(1);
1041 }
1042
1043 switch (plltype) {
1044 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1045 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1046 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1047 break;
1048 default:
1049 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1050 }
1051 if (!clock)
1052 return 0;
1053
1054 m1 = (m & SSB_CHIPCO_CLK_M1);
1055 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1056 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1057 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1058
1059 switch (plltype) {
1060 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1061 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1062 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1063 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1064 m1 = clkfactor_f6_resolve(m1);
1065 if ((plltype == SSB_PLLTYPE_1) ||
1066 (plltype == SSB_PLLTYPE_3))
1067 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1068 else
1069 m2 = clkfactor_f6_resolve(m2);
1070 m3 = clkfactor_f6_resolve(m3);
1071
1072 switch (mc) {
1073 case SSB_CHIPCO_CLK_MC_BYPASS:
1074 return clock;
1075 case SSB_CHIPCO_CLK_MC_M1:
1076 return (clock / m1);
1077 case SSB_CHIPCO_CLK_MC_M1M2:
1078 return (clock / (m1 * m2));
1079 case SSB_CHIPCO_CLK_MC_M1M2M3:
1080 return (clock / (m1 * m2 * m3));
1081 case SSB_CHIPCO_CLK_MC_M1M3:
1082 return (clock / (m1 * m3));
1083 }
1084 return 0;
1085 case SSB_PLLTYPE_2:
1086 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1087 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1088 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1089 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1090 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1091 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1092
1093 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1094 clock /= m1;
1095 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1096 clock /= m2;
1097 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1098 clock /= m3;
1099 return clock;
1100 default:
1101 SSB_WARN_ON(1);
1102 }
1103 return 0;
1104 }
1105
1106 /* Get the current speed the backplane is running at */
1107 u32 ssb_clockspeed(struct ssb_bus *bus)
1108 {
1109 u32 rate;
1110 u32 plltype;
1111 u32 clkctl_n, clkctl_m;
1112
1113 if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
1114 return ssb_pmu_get_controlclock(&bus->chipco);
1115
1116 if (ssb_extif_available(&bus->extif))
1117 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1118 &clkctl_n, &clkctl_m);
1119 else if (bus->chipco.dev)
1120 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1121 &clkctl_n, &clkctl_m);
1122 else
1123 return 0;
1124
1125 if (bus->chip_id == 0x5365) {
1126 rate = 100000000;
1127 } else {
1128 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1129 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1130 rate /= 2;
1131 }
1132
1133 return rate;
1134 }
1135 EXPORT_SYMBOL(ssb_clockspeed);
1136
1137 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1138 {
1139 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1140
1141 /* The REJECT bit seems to be different for Backplane rev 2.3 */
1142 switch (rev) {
1143 case SSB_IDLOW_SSBREV_22:
1144 case SSB_IDLOW_SSBREV_24:
1145 case SSB_IDLOW_SSBREV_26:
1146 return SSB_TMSLOW_REJECT;
1147 case SSB_IDLOW_SSBREV_23:
1148 return SSB_TMSLOW_REJECT_23;
1149 case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */
1150 case SSB_IDLOW_SSBREV_27: /* same here */
1151 return SSB_TMSLOW_REJECT; /* this is a guess */
1152 default:
1153 WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1154 }
1155 return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
1156 }
1157
1158 int ssb_device_is_enabled(struct ssb_device *dev)
1159 {
1160 u32 val;
1161 u32 reject;
1162
1163 reject = ssb_tmslow_reject_bitmask(dev);
1164 val = ssb_read32(dev, SSB_TMSLOW);
1165 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1166
1167 return (val == SSB_TMSLOW_CLOCK);
1168 }
1169 EXPORT_SYMBOL(ssb_device_is_enabled);
1170
1171 static void ssb_flush_tmslow(struct ssb_device *dev)
1172 {
1173 /* Make _really_ sure the device has finished the TMSLOW
1174 * register write transaction, as we risk running into
1175 * a machine check exception otherwise.
1176 * Do this by reading the register back to commit the
1177 * PCI write and delay an additional usec for the device
1178 * to react to the change. */
1179 ssb_read32(dev, SSB_TMSLOW);
1180 udelay(1);
1181 }
1182
1183 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1184 {
1185 u32 val;
1186
1187 ssb_device_disable(dev, core_specific_flags);
1188 ssb_write32(dev, SSB_TMSLOW,
1189 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1190 SSB_TMSLOW_FGC | core_specific_flags);
1191 ssb_flush_tmslow(dev);
1192
1193 /* Clear SERR if set. This is a hw bug workaround. */
1194 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1195 ssb_write32(dev, SSB_TMSHIGH, 0);
1196
1197 val = ssb_read32(dev, SSB_IMSTATE);
1198 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1199 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1200 ssb_write32(dev, SSB_IMSTATE, val);
1201 }
1202
1203 ssb_write32(dev, SSB_TMSLOW,
1204 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1205 core_specific_flags);
1206 ssb_flush_tmslow(dev);
1207
1208 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1209 core_specific_flags);
1210 ssb_flush_tmslow(dev);
1211 }
1212 EXPORT_SYMBOL(ssb_device_enable);
1213
1214 /* Wait for bitmask in a register to get set or cleared.
1215 * timeout is in units of ten-microseconds */
1216 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1217 int timeout, int set)
1218 {
1219 int i;
1220 u32 val;
1221
1222 for (i = 0; i < timeout; i++) {
1223 val = ssb_read32(dev, reg);
1224 if (set) {
1225 if ((val & bitmask) == bitmask)
1226 return 0;
1227 } else {
1228 if (!(val & bitmask))
1229 return 0;
1230 }
1231 udelay(10);
1232 }
1233 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1234 "register %04X to %s.\n",
1235 bitmask, reg, (set ? "set" : "clear"));
1236
1237 return -ETIMEDOUT;
1238 }
1239
1240 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1241 {
1242 u32 reject, val;
1243
1244 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1245 return;
1246
1247 reject = ssb_tmslow_reject_bitmask(dev);
1248
1249 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1250 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1251 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1252 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1253
1254 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1255 val = ssb_read32(dev, SSB_IMSTATE);
1256 val |= SSB_IMSTATE_REJECT;
1257 ssb_write32(dev, SSB_IMSTATE, val);
1258 ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1259 0);
1260 }
1261
1262 ssb_write32(dev, SSB_TMSLOW,
1263 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1264 reject | SSB_TMSLOW_RESET |
1265 core_specific_flags);
1266 ssb_flush_tmslow(dev);
1267
1268 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1269 val = ssb_read32(dev, SSB_IMSTATE);
1270 val &= ~SSB_IMSTATE_REJECT;
1271 ssb_write32(dev, SSB_IMSTATE, val);
1272 }
1273 }
1274
1275 ssb_write32(dev, SSB_TMSLOW,
1276 reject | SSB_TMSLOW_RESET |
1277 core_specific_flags);
1278 ssb_flush_tmslow(dev);
1279 }
1280 EXPORT_SYMBOL(ssb_device_disable);
1281
1282 /* Some chipsets need routing known for PCIe and 64-bit DMA */
1283 static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1284 {
1285 u16 chip_id = dev->bus->chip_id;
1286
1287 if (dev->id.coreid == SSB_DEV_80211) {
1288 return (chip_id == 0x4322 || chip_id == 43221 ||
1289 chip_id == 43231 || chip_id == 43222);
1290 }
1291
1292 return 0;
1293 }
1294
1295 u32 ssb_dma_translation(struct ssb_device *dev)
1296 {
1297 switch (dev->bus->bustype) {
1298 case SSB_BUSTYPE_SSB:
1299 return 0;
1300 case SSB_BUSTYPE_PCI:
1301 if (pci_is_pcie(dev->bus->host_pci) &&
1302 ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
1303 return SSB_PCIE_DMA_H32;
1304 } else {
1305 if (ssb_dma_translation_special_bit(dev))
1306 return SSB_PCIE_DMA_H32;
1307 else
1308 return SSB_PCI_DMA;
1309 }
1310 default:
1311 __ssb_dma_not_implemented(dev);
1312 }
1313 return 0;
1314 }
1315 EXPORT_SYMBOL(ssb_dma_translation);
1316
1317 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1318 {
1319 struct ssb_chipcommon *cc;
1320 int err = 0;
1321
1322 /* On buses where more than one core may be working
1323 * at a time, we must not powerdown stuff if there are
1324 * still cores that may want to run. */
1325 if (bus->bustype == SSB_BUSTYPE_SSB)
1326 goto out;
1327
1328 cc = &bus->chipco;
1329
1330 if (!cc->dev)
1331 goto out;
1332 if (cc->dev->id.revision < 5)
1333 goto out;
1334
1335 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1336 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1337 if (err)
1338 goto error;
1339 out:
1340 #ifdef CONFIG_SSB_DEBUG
1341 bus->powered_up = 0;
1342 #endif
1343 return err;
1344 error:
1345 ssb_err("Bus powerdown failed\n");
1346 goto out;
1347 }
1348 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1349
1350 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1351 {
1352 int err;
1353 enum ssb_clkmode mode;
1354
1355 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1356 if (err)
1357 goto error;
1358
1359 #ifdef CONFIG_SSB_DEBUG
1360 bus->powered_up = 1;
1361 #endif
1362
1363 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1364 ssb_chipco_set_clockmode(&bus->chipco, mode);
1365
1366 return 0;
1367 error:
1368 ssb_err("Bus powerup failed\n");
1369 return err;
1370 }
1371 EXPORT_SYMBOL(ssb_bus_powerup);
1372
1373 static void ssb_broadcast_value(struct ssb_device *dev,
1374 u32 address, u32 data)
1375 {
1376 #ifdef CONFIG_SSB_DRIVER_PCICORE
1377 /* This is used for both, PCI and ChipCommon core, so be careful. */
1378 BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1379 BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
1380 #endif
1381
1382 ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1383 ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1384 ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1385 ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
1386 }
1387
1388 void ssb_commit_settings(struct ssb_bus *bus)
1389 {
1390 struct ssb_device *dev;
1391
1392 #ifdef CONFIG_SSB_DRIVER_PCICORE
1393 dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
1394 #else
1395 dev = bus->chipco.dev;
1396 #endif
1397 if (WARN_ON(!dev))
1398 return;
1399 /* This forces an update of the cached registers. */
1400 ssb_broadcast_value(dev, 0xFD8, 0);
1401 }
1402 EXPORT_SYMBOL(ssb_commit_settings);
1403
1404 u32 ssb_admatch_base(u32 adm)
1405 {
1406 u32 base = 0;
1407
1408 switch (adm & SSB_ADM_TYPE) {
1409 case SSB_ADM_TYPE0:
1410 base = (adm & SSB_ADM_BASE0);
1411 break;
1412 case SSB_ADM_TYPE1:
1413 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1414 base = (adm & SSB_ADM_BASE1);
1415 break;
1416 case SSB_ADM_TYPE2:
1417 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1418 base = (adm & SSB_ADM_BASE2);
1419 break;
1420 default:
1421 SSB_WARN_ON(1);
1422 }
1423
1424 return base;
1425 }
1426 EXPORT_SYMBOL(ssb_admatch_base);
1427
1428 u32 ssb_admatch_size(u32 adm)
1429 {
1430 u32 size = 0;
1431
1432 switch (adm & SSB_ADM_TYPE) {
1433 case SSB_ADM_TYPE0:
1434 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1435 break;
1436 case SSB_ADM_TYPE1:
1437 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1438 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1439 break;
1440 case SSB_ADM_TYPE2:
1441 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1442 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1443 break;
1444 default:
1445 SSB_WARN_ON(1);
1446 }
1447 size = (1 << (size + 1));
1448
1449 return size;
1450 }
1451 EXPORT_SYMBOL(ssb_admatch_size);
1452
1453 static int __init ssb_modinit(void)
1454 {
1455 int err;
1456
1457 /* See the comment at the ssb_is_early_boot definition */
1458 ssb_is_early_boot = 0;
1459 err = bus_register(&ssb_bustype);
1460 if (err)
1461 return err;
1462
1463 /* Maybe we already registered some buses at early boot.
1464 * Check for this and attach them
1465 */
1466 ssb_buses_lock();
1467 err = ssb_attach_queued_buses();
1468 ssb_buses_unlock();
1469 if (err) {
1470 bus_unregister(&ssb_bustype);
1471 goto out;
1472 }
1473
1474 err = b43_pci_ssb_bridge_init();
1475 if (err) {
1476 ssb_err("Broadcom 43xx PCI-SSB-bridge initialization failed\n");
1477 /* don't fail SSB init because of this */
1478 err = 0;
1479 }
1480 err = ssb_gige_init();
1481 if (err) {
1482 ssb_err("SSB Broadcom Gigabit Ethernet driver initialization failed\n");
1483 /* don't fail SSB init because of this */
1484 err = 0;
1485 }
1486 out:
1487 return err;
1488 }
1489 /* ssb must be initialized after PCI but before the ssb drivers.
1490 * That means we must use some initcall between subsys_initcall
1491 * and device_initcall. */
1492 fs_initcall(ssb_modinit);
1493
1494 static void __exit ssb_modexit(void)
1495 {
1496 ssb_gige_exit();
1497 b43_pci_ssb_bridge_exit();
1498 bus_unregister(&ssb_bustype);
1499 }
1500 module_exit(ssb_modexit)
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