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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
[linux-2.6-block.git] / drivers / ssb / main.c
CommitLineData
61e115a5
MB		 1/*
2 * Sonics Silicon Backplane
3 * Subsystem core
4 *
5 * Copyright 2005, Broadcom Corporation
eb032b98 6 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
61e115a5
MB		 7 *
8 * Licensed under the GNU/GPL. See COPYING for details.
9 */
10
11#include "ssb_private.h"
12
13#include <linux/delay.h>
6faf035c 14#include <linux/io.h>
20a112d0 15#include <linux/module.h>
bde327ef 16#include <linux/platform_device.h>
61e115a5
MB		 17#include <linux/ssb/ssb.h>
18#include <linux/ssb/ssb_regs.h>
aab547ce 19#include <linux/ssb/ssb_driver_gige.h>
61e115a5
MB		 20#include <linux/dma-mapping.h>
21#include <linux/pci.h>
24ea602e 22#include <linux/mmc/sdio_func.h>
5a0e3ad6 23#include <linux/slab.h>
61e115a5 24
61e115a5
MB		 25#include <pcmcia/cistpl.h>
26#include <pcmcia/ds.h>
27
28
29MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
30MODULE_LICENSE("GPL");
31
32
33/* Temporary list of yet-to-be-attached buses */
34static LIST_HEAD(attach_queue);
35/* List if running buses */
36static LIST_HEAD(buses);
37/* Software ID counter */
38static 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. */
41static 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. */
49static bool ssb_is_early_boot = 1;
50
51static void ssb_buses_lock(void);
52static void ssb_buses_unlock(void);
53
54
55#ifdef CONFIG_SSB_PCIHOST
56struct 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;
67found:
68 ssb_buses_unlock();
69
70 return bus;
71}
72#endif /* CONFIG_SSB_PCIHOST */
73
e7ec2e32
MB		 74#ifdef CONFIG_SSB_PCMCIAHOST
75struct 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;
86found:
87 ssb_buses_unlock();
88
89 return bus;
90}
91#endif /* CONFIG_SSB_PCMCIAHOST */
92
24ea602e
AH		 93#ifdef CONFIG_SSB_SDIOHOST
94struct 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;
105found:
106 ssb_buses_unlock();
107
108 return bus;
109}
110#endif /* CONFIG_SSB_SDIOHOST */
111
aab547ce
MB		 112int 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
61e115a5
MB		 131static struct ssb_device *ssb_device_get(struct ssb_device *dev)
132{
133 if (dev)
134 get_device(dev->dev);
135 return dev;
136}
137
138static void ssb_device_put(struct ssb_device *dev)
139{
140 if (dev)
141 put_device(dev->dev);
142}
143
61e115a5
MB		 144static 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;
61e115a5
MB		 148 int err = 0;
149
61e115a5
MB		 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 }
157out:
158 return err;
159}
160
61e115a5
MB		 161static 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;
61e115a5
MB		 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 }
8fe2b65a
MB		 174out:
175 return err;
176}
61e115a5 177
8fe2b65a
MB		 178int 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;
61e115a5 196 }
8fe2b65a
MB		 197 ssb_chipco_resume(&bus->chipco);
198 ssb_bus_may_powerdown(bus);
61e115a5 199
8fe2b65a
MB		 200 return 0;
201}
202EXPORT_SYMBOL(ssb_bus_resume);
203
204int 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;
61e115a5 210}
8fe2b65a 211EXPORT_SYMBOL(ssb_bus_suspend);
61e115a5 212
d72bb40f 213#ifdef CONFIG_SSB_SPROM
3ba6018a
MB		 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 */
223int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
61e115a5 224{
3ba6018a
MB		 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));
61e115a5 232
61e115a5 233 for (i = 0; i < bus->nr_devices; i++) {
3ba6018a
MB		 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);
61e115a5 239 continue;
61e115a5 240 }
f3ff9247
AS		 241 sdrv = drv_to_ssb_drv(sdev->dev->driver);
242 if (SSB_WARN_ON(!sdrv->remove))
61e115a5 243 continue;
3ba6018a
MB		 244 sdrv->remove(sdev);
245 ctx->device_frozen[i] = 1;
61e115a5
MB		 246 }
247
248 return 0;
61e115a5
MB		 249}
250
3ba6018a
MB		 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 */
257int ssb_devices_thaw(struct ssb_freeze_context *ctx)
61e115a5 258{
3ba6018a
MB		 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;
61e115a5
MB		 264
265 for (i = 0; i < bus->nr_devices; i++) {
3ba6018a 266 if (!ctx->device_frozen[i])
61e115a5 267 continue;
3ba6018a
MB		 268 sdev = &bus->devices[i];
269
270 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
61e115a5 271 continue;
3ba6018a
MB		 272 sdrv = drv_to_ssb_drv(sdev->dev->driver);
273 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
61e115a5 274 continue;
3ba6018a
MB		 275
276 err = sdrv->probe(sdev, &sdev->id);
61e115a5 277 if (err) {
33a606ac
JP		 278 ssb_err("Failed to thaw device %s\n",
279 dev_name(sdev->dev));
3ba6018a 280 result = err;
61e115a5 281 }
3ba6018a 282 ssb_device_put(sdev);
61e115a5
MB		 283 }
284
3ba6018a 285 return result;
61e115a5 286}
d72bb40f 287#endif /* CONFIG_SSB_SPROM */
61e115a5
MB		 288
289static 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
301static 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
313static 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
328static 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
343static 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
7ac0326c 359static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
61e115a5
MB		 360{
361 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
61e115a5
MB		 362
363 if (!dev)
364 return -ENODEV;
365
7ac0326c 366 return add_uevent_var(env,
61e115a5
MB		 367 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
368 ssb_dev->id.vendor, ssb_dev->id.coreid,
369 ssb_dev->id.revision);
61e115a5
MB		 370}
371
aa3bf280
HM		 372#define ssb_config_attr(attrib, field, format_string) \
373static ssize_t \
374attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
375{ \
376 return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
4e9072d6
GKH		 377} \
378static DEVICE_ATTR_RO(attrib);
aa3bf280
HM		 379
380ssb_config_attr(core_num, core_index, "%u\n")
381ssb_config_attr(coreid, id.coreid, "0x%04x\n")
382ssb_config_attr(vendor, id.vendor, "0x%04x\n")
383ssb_config_attr(revision, id.revision, "%u\n")
384ssb_config_attr(irq, irq, "%u\n")
385static ssize_t
386name_show(struct device *dev, struct device_attribute *attr, char *buf)
387{
388 return sprintf(buf, "%s\n",
389 ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
390}
4e9072d6
GKH		 391static DEVICE_ATTR_RO(name);
392
393static struct attribute *ssb_device_attrs[] = {
394 &dev_attr_name.attr,
395 &dev_attr_core_num.attr,
396 &dev_attr_coreid.attr,
397 &dev_attr_vendor.attr,
398 &dev_attr_revision.attr,
399 &dev_attr_irq.attr,
400 NULL,
aa3bf280 401};
4e9072d6 402ATTRIBUTE_GROUPS(ssb_device);
aa3bf280 403
61e115a5
MB		 404static struct bus_type ssb_bustype = {
405 .name = "ssb",
406 .match = ssb_bus_match,
407 .probe = ssb_device_probe,
408 .remove = ssb_device_remove,
409 .shutdown = ssb_device_shutdown,
410 .suspend = ssb_device_suspend,
411 .resume = ssb_device_resume,
412 .uevent = ssb_device_uevent,
4e9072d6 413 .dev_groups = ssb_device_groups,
61e115a5
MB		 414};
415
416static void ssb_buses_lock(void)
417{
418 /* See the comment at the ssb_is_early_boot definition */
419 if (!ssb_is_early_boot)
420 mutex_lock(&buses_mutex);
421}
422
423static void ssb_buses_unlock(void)
424{
425 /* See the comment at the ssb_is_early_boot definition */
426 if (!ssb_is_early_boot)
427 mutex_unlock(&buses_mutex);
428}
429
430static void ssb_devices_unregister(struct ssb_bus *bus)
431{
432 struct ssb_device *sdev;
433 int i;
434
435 for (i = bus->nr_devices - 1; i >= 0; i--) {
436 sdev = &(bus->devices[i]);
437 if (sdev->dev)
438 device_unregister(sdev->dev);
439 }
bde327ef
HM		 440
441#ifdef CONFIG_SSB_EMBEDDED
442 if (bus->bustype == SSB_BUSTYPE_SSB)
443 platform_device_unregister(bus->watchdog);
444#endif
61e115a5
MB		 445}
446
447void ssb_bus_unregister(struct ssb_bus *bus)
448{
600485ed
HM		 449 int err;
450
451 err = ssb_gpio_unregister(bus);
452 if (err == -EBUSY)
33a606ac 453 ssb_dbg("Some GPIOs are still in use\n");
600485ed 454 else if (err)
33a606ac 455 ssb_dbg("Can not unregister GPIO driver: %i\n", err);
600485ed 456
61e115a5
MB		 457 ssb_buses_lock();
458 ssb_devices_unregister(bus);
459 list_del(&bus->list);
460 ssb_buses_unlock();
461
e7ec2e32 462 ssb_pcmcia_exit(bus);
61e115a5
MB		 463 ssb_pci_exit(bus);
464 ssb_iounmap(bus);
465}
466EXPORT_SYMBOL(ssb_bus_unregister);
467
468static void ssb_release_dev(struct device *dev)
469{
470 struct __ssb_dev_wrapper *devwrap;
471
472 devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
473 kfree(devwrap);
474}
475
476static int ssb_devices_register(struct ssb_bus *bus)
477{
478 struct ssb_device *sdev;
479 struct device *dev;
480 struct __ssb_dev_wrapper *devwrap;
481 int i, err = 0;
482 int dev_idx = 0;
483
484 for (i = 0; i < bus->nr_devices; i++) {
485 sdev = &(bus->devices[i]);
486
487 /* We don't register SSB-system devices to the kernel,
488 * as the drivers for them are built into SSB. */
489 switch (sdev->id.coreid) {
490 case SSB_DEV_CHIPCOMMON:
491 case SSB_DEV_PCI:
492 case SSB_DEV_PCIE:
493 case SSB_DEV_PCMCIA:
494 case SSB_DEV_MIPS:
495 case SSB_DEV_MIPS_3302:
496 case SSB_DEV_EXTIF:
497 continue;
498 }
499
500 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
501 if (!devwrap) {
33a606ac 502 ssb_err("Could not allocate device\n");
61e115a5
MB		 503 err = -ENOMEM;
504 goto error;
505 }
506 dev = &devwrap->dev;
507 devwrap->sdev = sdev;
508
509 dev->release = ssb_release_dev;
510 dev->bus = &ssb_bustype;
b7b05fe7 511 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
61e115a5
MB		 512
513 switch (bus->bustype) {
514 case SSB_BUSTYPE_PCI:
515#ifdef CONFIG_SSB_PCIHOST
516 sdev->irq = bus->host_pci->irq;
517 dev->parent = &bus->host_pci->dev;
14f92952 518 sdev->dma_dev = dev->parent;
61e115a5
MB		 519#endif
520 break;
521 case SSB_BUSTYPE_PCMCIA:
522#ifdef CONFIG_SSB_PCMCIAHOST
eb14120f 523 sdev->irq = bus->host_pcmcia->irq;
61e115a5 524 dev->parent = &bus->host_pcmcia->dev;
24ea602e
AH		 525#endif
526 break;
527 case SSB_BUSTYPE_SDIO:
391ae22a 528#ifdef CONFIG_SSB_SDIOHOST
24ea602e 529 dev->parent = &bus->host_sdio->dev;
61e115a5
MB		 530#endif
531 break;
532 case SSB_BUSTYPE_SSB:
ac82da33 533 dev->dma_mask = &dev->coherent_dma_mask;
14f92952 534 sdev->dma_dev = dev;
61e115a5
MB		 535 break;
536 }
537
538 sdev->dev = dev;
539 err = device_register(dev);
540 if (err) {
33a606ac 541 ssb_err("Could not register %s\n", dev_name(dev));
61e115a5
MB		 542 /* Set dev to NULL to not unregister
543 * dev on error unwinding. */
544 sdev->dev = NULL;
545 kfree(devwrap);
546 goto error;
547 }
548 dev_idx++;
549 }
550
c7a4a9e3
RM		 551#ifdef CONFIG_SSB_DRIVER_MIPS
552 if (bus->mipscore.pflash.present) {
553 err = platform_device_register(&ssb_pflash_dev);
554 if (err)
555 pr_err("Error registering parallel flash\n");
556 }
557#endif
558
7b5d6043
RM		 559#ifdef CONFIG_SSB_SFLASH
560 if (bus->mipscore.sflash.present) {
561 err = platform_device_register(&ssb_sflash_dev);
562 if (err)
563 pr_err("Error registering serial flash\n");
564 }
565#endif
566
61e115a5
MB		 567 return 0;
568error:
569 /* Unwind the already registered devices. */
570 ssb_devices_unregister(bus);
571 return err;
572}
573
574/* Needs ssb_buses_lock() */
163247c1 575static int ssb_attach_queued_buses(void)
61e115a5
MB		 576{
577 struct ssb_bus *bus, *n;
578 int err = 0;
579 int drop_them_all = 0;
580
581 list_for_each_entry_safe(bus, n, &attach_queue, list) {
582 if (drop_them_all) {
583 list_del(&bus->list);
584 continue;
585 }
586 /* Can't init the PCIcore in ssb_bus_register(), as that
587 * is too early in boot for embedded systems
588 * (no udelay() available). So do it here in attach stage.
589 */
590 err = ssb_bus_powerup(bus, 0);
591 if (err)
592 goto error;
593 ssb_pcicore_init(&bus->pcicore);
bde327ef
HM		 594 if (bus->bustype == SSB_BUSTYPE_SSB)
595 ssb_watchdog_register(bus);
61e115a5
MB		 596 ssb_bus_may_powerdown(bus);
597
598 err = ssb_devices_register(bus);
599error:
600 if (err) {
601 drop_them_all = 1;
602 list_del(&bus->list);
603 continue;
604 }
605 list_move_tail(&bus->list, &buses);
606 }
607
608 return err;
609}
610
ffc7689d
MB		 611static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
612{
613 struct ssb_bus *bus = dev->bus;
614
615 offset += dev->core_index * SSB_CORE_SIZE;
616 return readb(bus->mmio + offset);
617}
618
61e115a5
MB		 619static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
620{
621 struct ssb_bus *bus = dev->bus;
622
623 offset += dev->core_index * SSB_CORE_SIZE;
624 return readw(bus->mmio + offset);
625}
626
627static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
628{
629 struct ssb_bus *bus = dev->bus;
630
631 offset += dev->core_index * SSB_CORE_SIZE;
632 return readl(bus->mmio + offset);
633}
634
d625a29b
MB		 635#ifdef CONFIG_SSB_BLOCKIO
636static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
637 size_t count, u16 offset, u8 reg_width)
638{
639 struct ssb_bus *bus = dev->bus;
640 void __iomem *addr;
641
642 offset += dev->core_index * SSB_CORE_SIZE;
643 addr = bus->mmio + offset;
644
645 switch (reg_width) {
646 case sizeof(u8): {
647 u8 *buf = buffer;
648
649 while (count) {
650 *buf = __raw_readb(addr);
651 buf++;
652 count--;
653 }
654 break;
655 }
656 case sizeof(u16): {
657 __le16 *buf = buffer;
658
659 SSB_WARN_ON(count & 1);
660 while (count) {
661 *buf = (__force __le16)__raw_readw(addr);
662 buf++;
663 count -= 2;
664 }
665 break;
666 }
667 case sizeof(u32): {
668 __le32 *buf = buffer;
669
670 SSB_WARN_ON(count & 3);
671 while (count) {
672 *buf = (__force __le32)__raw_readl(addr);
673 buf++;
674 count -= 4;
675 }
676 break;
677 }
678 default:
679 SSB_WARN_ON(1);
680 }
681}
682#endif /* CONFIG_SSB_BLOCKIO */
683
ffc7689d
MB		 684static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
685{
686 struct ssb_bus *bus = dev->bus;
687
688 offset += dev->core_index * SSB_CORE_SIZE;
689 writeb(value, bus->mmio + offset);
690}
691
61e115a5
MB		 692static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
693{
694 struct ssb_bus *bus = dev->bus;
695
696 offset += dev->core_index * SSB_CORE_SIZE;
697 writew(value, bus->mmio + offset);
698}
699
700static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
701{
702 struct ssb_bus *bus = dev->bus;
703
704 offset += dev->core_index * SSB_CORE_SIZE;
705 writel(value, bus->mmio + offset);
706}
707
d625a29b
MB		 708#ifdef CONFIG_SSB_BLOCKIO
709static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
710 size_t count, u16 offset, u8 reg_width)
711{
712 struct ssb_bus *bus = dev->bus;
713 void __iomem *addr;
714
715 offset += dev->core_index * SSB_CORE_SIZE;
716 addr = bus->mmio + offset;
717
718 switch (reg_width) {
719 case sizeof(u8): {
720 const u8 *buf = buffer;
721
722 while (count) {
723 __raw_writeb(*buf, addr);
724 buf++;
725 count--;
726 }
727 break;
728 }
729 case sizeof(u16): {
730 const __le16 *buf = buffer;
731
732 SSB_WARN_ON(count & 1);
733 while (count) {
734 __raw_writew((__force u16)(*buf), addr);
735 buf++;
736 count -= 2;
737 }
738 break;
739 }
740 case sizeof(u32): {
741 const __le32 *buf = buffer;
742
743 SSB_WARN_ON(count & 3);
744 while (count) {
745 __raw_writel((__force u32)(*buf), addr);
746 buf++;
747 count -= 4;
748 }
749 break;
750 }
751 default:
752 SSB_WARN_ON(1);
753 }
754}
755#endif /* CONFIG_SSB_BLOCKIO */
756
61e115a5
MB		 757/* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
758static const struct ssb_bus_ops ssb_ssb_ops = {
ffc7689d 759 .read8 = ssb_ssb_read8,
61e115a5
MB		 760 .read16 = ssb_ssb_read16,
761 .read32 = ssb_ssb_read32,
ffc7689d 762 .write8 = ssb_ssb_write8,
61e115a5
MB		 763 .write16 = ssb_ssb_write16,
764 .write32 = ssb_ssb_write32,
d625a29b
MB		 765#ifdef CONFIG_SSB_BLOCKIO
766 .block_read = ssb_ssb_block_read,
767 .block_write = ssb_ssb_block_write,
768#endif
61e115a5
MB		 769};
770
771static int ssb_fetch_invariants(struct ssb_bus *bus,
772 ssb_invariants_func_t get_invariants)
773{
774 struct ssb_init_invariants iv;
775 int err;
776
777 memset(&iv, 0, sizeof(iv));
778 err = get_invariants(bus, &iv);
779 if (err)
780 goto out;
781 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
782 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
7cb44615 783 bus->has_cardbus_slot = iv.has_cardbus_slot;
61e115a5
MB		 784out:
785 return err;
786}
787
163247c1
GKH		 788static int ssb_bus_register(struct ssb_bus *bus,
789 ssb_invariants_func_t get_invariants,
790 unsigned long baseaddr)
61e115a5
MB		 791{
792 int err;
793
794 spin_lock_init(&bus->bar_lock);
795 INIT_LIST_HEAD(&bus->list);
53521d8c
MB		 796#ifdef CONFIG_SSB_EMBEDDED
797 spin_lock_init(&bus->gpio_lock);
798#endif
61e115a5
MB		 799
800 /* Powerup the bus */
801 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
802 if (err)
803 goto out;
24ea602e
AH		 804
805 /* Init SDIO-host device (if any), before the scan */
806 err = ssb_sdio_init(bus);
807 if (err)
808 goto err_disable_xtal;
809
61e115a5
MB		 810 ssb_buses_lock();
811 bus->busnumber = next_busnumber;
812 /* Scan for devices (cores) */
813 err = ssb_bus_scan(bus, baseaddr);
814 if (err)
24ea602e 815 goto err_sdio_exit;
61e115a5
MB		 816
817 /* Init PCI-host device (if any) */
818 err = ssb_pci_init(bus);
819 if (err)
820 goto err_unmap;
821 /* Init PCMCIA-host device (if any) */
822 err = ssb_pcmcia_init(bus);
823 if (err)
824 goto err_pci_exit;
825
826 /* Initialize basic system devices (if available) */
827 err = ssb_bus_powerup(bus, 0);
828 if (err)
829 goto err_pcmcia_exit;
830 ssb_chipcommon_init(&bus->chipco);
394bc7e3 831 ssb_extif_init(&bus->extif);
61e115a5 832 ssb_mipscore_init(&bus->mipscore);
ec43b08b
HM		 833 err = ssb_gpio_init(bus);
834 if (err == -ENOTSUPP)
33a606ac 835 ssb_dbg("GPIO driver not activated\n");
ec43b08b 836 else if (err)
33a606ac 837 ssb_dbg("Error registering GPIO driver: %i\n", err);
61e115a5
MB		 838 err = ssb_fetch_invariants(bus, get_invariants);
839 if (err) {
840 ssb_bus_may_powerdown(bus);
841 goto err_pcmcia_exit;
842 }
843 ssb_bus_may_powerdown(bus);
844
845 /* Queue it for attach.
846 * See the comment at the ssb_is_early_boot definition. */
847 list_add_tail(&bus->list, &attach_queue);
848 if (!ssb_is_early_boot) {
849 /* This is not early boot, so we must attach the bus now */
850 err = ssb_attach_queued_buses();
851 if (err)
852 goto err_dequeue;
853 }
854 next_busnumber++;
855 ssb_buses_unlock();
856
857out:
858 return err;
859
860err_dequeue:
861 list_del(&bus->list);
862err_pcmcia_exit:
e7ec2e32 863 ssb_pcmcia_exit(bus);
61e115a5
MB		 864err_pci_exit:
865 ssb_pci_exit(bus);
866err_unmap:
867 ssb_iounmap(bus);
24ea602e
AH		 868err_sdio_exit:
869 ssb_sdio_exit(bus);
61e115a5
MB		 870err_disable_xtal:
871 ssb_buses_unlock();
872 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
873 return err;
874}
875
876#ifdef CONFIG_SSB_PCIHOST
163247c1 877int ssb_bus_pcibus_register(struct ssb_bus *bus, struct pci_dev *host_pci)
61e115a5
MB		 878{
879 int err;
880
881 bus->bustype = SSB_BUSTYPE_PCI;
882 bus->host_pci = host_pci;
883 bus->ops = &ssb_pci_ops;
884
885 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
886 if (!err) {
33a606ac
JP		 887 ssb_info("Sonics Silicon Backplane found on PCI device %s\n",
888 dev_name(&host_pci->dev));
ce9626ea 889 } else {
33a606ac
JP		 890 ssb_err("Failed to register PCI version of SSB with error %d\n",
891 err);
61e115a5
MB		 892 }
893
894 return err;
895}
896EXPORT_SYMBOL(ssb_bus_pcibus_register);
897#endif /* CONFIG_SSB_PCIHOST */
898
899#ifdef CONFIG_SSB_PCMCIAHOST
163247c1
GKH		 900int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
901 struct pcmcia_device *pcmcia_dev,
902 unsigned long baseaddr)
61e115a5
MB		 903{
904 int err;
905
906 bus->bustype = SSB_BUSTYPE_PCMCIA;
907 bus->host_pcmcia = pcmcia_dev;
908 bus->ops = &ssb_pcmcia_ops;
909
910 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
911 if (!err) {
33a606ac
JP		 912 ssb_info("Sonics Silicon Backplane found on PCMCIA device %s\n",
913 pcmcia_dev->devname);
61e115a5
MB		 914 }
915
916 return err;
917}
918EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
919#endif /* CONFIG_SSB_PCMCIAHOST */
920
24ea602e 921#ifdef CONFIG_SSB_SDIOHOST
163247c1
GKH		 922int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
923 unsigned int quirks)
24ea602e
AH		 924{
925 int err;
926
927 bus->bustype = SSB_BUSTYPE_SDIO;
928 bus->host_sdio = func;
929 bus->ops = &ssb_sdio_ops;
930 bus->quirks = quirks;
931
932 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
933 if (!err) {
33a606ac
JP		 934 ssb_info("Sonics Silicon Backplane found on SDIO device %s\n",
935 sdio_func_id(func));
24ea602e
AH		 936 }
937
938 return err;
939}
940EXPORT_SYMBOL(ssb_bus_sdiobus_register);
941#endif /* CONFIG_SSB_PCMCIAHOST */
942
163247c1
GKH		 943int ssb_bus_ssbbus_register(struct ssb_bus *bus, unsigned long baseaddr,
944 ssb_invariants_func_t get_invariants)
61e115a5
MB		 945{
946 int err;
947
948 bus->bustype = SSB_BUSTYPE_SSB;
949 bus->ops = &ssb_ssb_ops;
950
951 err = ssb_bus_register(bus, get_invariants, baseaddr);
952 if (!err) {
33a606ac
JP		 953 ssb_info("Sonics Silicon Backplane found at address 0x%08lX\n",
954 baseaddr);
61e115a5
MB		 955 }
956
957 return err;
958}
959
960int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
961{
962 drv->drv.name = drv->name;
963 drv->drv.bus = &ssb_bustype;
964 drv->drv.owner = owner;
965
966 return driver_register(&drv->drv);
967}
968EXPORT_SYMBOL(__ssb_driver_register);
969
970void ssb_driver_unregister(struct ssb_driver *drv)
971{
972 driver_unregister(&drv->drv);
973}
974EXPORT_SYMBOL(ssb_driver_unregister);
975
976void ssb_set_devtypedata(struct ssb_device *dev, void *data)
977{
978 struct ssb_bus *bus = dev->bus;
979 struct ssb_device *ent;
980 int i;
981
982 for (i = 0; i < bus->nr_devices; i++) {
983 ent = &(bus->devices[i]);
984 if (ent->id.vendor != dev->id.vendor)
985 continue;
986 if (ent->id.coreid != dev->id.coreid)
987 continue;
988
989 ent->devtypedata = data;
990 }
991}
992EXPORT_SYMBOL(ssb_set_devtypedata);
993
994static u32 clkfactor_f6_resolve(u32 v)
995{
996 /* map the magic values */
997 switch (v) {
998 case SSB_CHIPCO_CLK_F6_2:
999 return 2;
1000 case SSB_CHIPCO_CLK_F6_3:
1001 return 3;
1002 case SSB_CHIPCO_CLK_F6_4:
1003 return 4;
1004 case SSB_CHIPCO_CLK_F6_5:
1005 return 5;
1006 case SSB_CHIPCO_CLK_F6_6:
1007 return 6;
1008 case SSB_CHIPCO_CLK_F6_7:
1009 return 7;
1010 }
1011 return 0;
1012}
1013
1014/* Calculate the speed the backplane would run at a given set of clockcontrol values */
1015u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
1016{
1017 u32 n1, n2, clock, m1, m2, m3, mc;
1018
1019 n1 = (n & SSB_CHIPCO_CLK_N1);
1020 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
1021
1022 switch (plltype) {
1023 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
1024 if (m & SSB_CHIPCO_CLK_T6_MMASK)
e913d468
HM		 1025 return SSB_CHIPCO_CLK_T6_M1;
1026 return SSB_CHIPCO_CLK_T6_M0;
61e115a5
MB		 1027 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1028 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1029 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1030 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1031 n1 = clkfactor_f6_resolve(n1);
1032 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1033 break;
1034 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1035 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1036 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1037 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1038 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1039 break;
1040 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1041 return 100000000;
1042 default:
1043 SSB_WARN_ON(1);
1044 }
1045
1046 switch (plltype) {
1047 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1048 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1049 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1050 break;
1051 default:
1052 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1053 }
1054 if (!clock)
1055 return 0;
1056
1057 m1 = (m & SSB_CHIPCO_CLK_M1);
1058 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1059 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1060 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1061
1062 switch (plltype) {
1063 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1064 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1065 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1066 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1067 m1 = clkfactor_f6_resolve(m1);
1068 if ((plltype == SSB_PLLTYPE_1) ||
1069 (plltype == SSB_PLLTYPE_3))
1070 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1071 else
1072 m2 = clkfactor_f6_resolve(m2);
1073 m3 = clkfactor_f6_resolve(m3);
1074
1075 switch (mc) {
1076 case SSB_CHIPCO_CLK_MC_BYPASS:
1077 return clock;
1078 case SSB_CHIPCO_CLK_MC_M1:
1079 return (clock / m1);
1080 case SSB_CHIPCO_CLK_MC_M1M2:
1081 return (clock / (m1 * m2));
1082 case SSB_CHIPCO_CLK_MC_M1M2M3:
1083 return (clock / (m1 * m2 * m3));
1084 case SSB_CHIPCO_CLK_MC_M1M3:
1085 return (clock / (m1 * m3));
1086 }
1087 return 0;
1088 case SSB_PLLTYPE_2:
1089 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1090 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1091 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1092 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1093 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1094 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1095
1096 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1097 clock /= m1;
1098 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1099 clock /= m2;
1100 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1101 clock /= m3;
1102 return clock;
1103 default:
1104 SSB_WARN_ON(1);
1105 }
1106 return 0;
1107}
1108
1109/* Get the current speed the backplane is running at */
1110u32 ssb_clockspeed(struct ssb_bus *bus)
1111{
1112 u32 rate;
1113 u32 plltype;
1114 u32 clkctl_n, clkctl_m;
1115
d486a5b4
HM		 1116 if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
1117 return ssb_pmu_get_controlclock(&bus->chipco);
1118
61e115a5
MB		 1119 if (ssb_extif_available(&bus->extif))
1120 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1121 &clkctl_n, &clkctl_m);
1122 else if (bus->chipco.dev)
1123 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1124 &clkctl_n, &clkctl_m);
1125 else
1126 return 0;
1127
1128 if (bus->chip_id == 0x5365) {
1129 rate = 100000000;
1130 } else {
1131 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1132 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1133 rate /= 2;
1134 }
1135
1136 return rate;
1137}
1138EXPORT_SYMBOL(ssb_clockspeed);
1139
1140static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1141{
c272ef44
LF		 1142 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1143
04ad1fb2 1144 /* The REJECT bit seems to be different for Backplane rev 2.3 */
c272ef44 1145 switch (rev) {
61e115a5 1146 case SSB_IDLOW_SSBREV_22:
04ad1fb2
RM		 1147 case SSB_IDLOW_SSBREV_24:
1148 case SSB_IDLOW_SSBREV_26:
1149 return SSB_TMSLOW_REJECT;
61e115a5
MB		 1150 case SSB_IDLOW_SSBREV_23:
1151 return SSB_TMSLOW_REJECT_23;
04ad1fb2 1152 case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */
c272ef44 1153 case SSB_IDLOW_SSBREV_27: /* same here */
04ad1fb2 1154 return SSB_TMSLOW_REJECT; /* this is a guess */
61e115a5 1155 default:
6cdd6400 1156 WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
61e115a5 1157 }
04ad1fb2 1158 return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
61e115a5
MB		 1159}
1160
1161int ssb_device_is_enabled(struct ssb_device *dev)
1162{
1163 u32 val;
1164 u32 reject;
1165
1166 reject = ssb_tmslow_reject_bitmask(dev);
1167 val = ssb_read32(dev, SSB_TMSLOW);
1168 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1169
1170 return (val == SSB_TMSLOW_CLOCK);
1171}
1172EXPORT_SYMBOL(ssb_device_is_enabled);
1173
1174static void ssb_flush_tmslow(struct ssb_device *dev)
1175{
1176 /* Make _really_ sure the device has finished the TMSLOW
1177 * register write transaction, as we risk running into
1178 * a machine check exception otherwise.
1179 * Do this by reading the register back to commit the
1180 * PCI write and delay an additional usec for the device
1181 * to react to the change. */
1182 ssb_read32(dev, SSB_TMSLOW);
1183 udelay(1);
1184}
1185
1186void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1187{
1188 u32 val;
1189
1190 ssb_device_disable(dev, core_specific_flags);
1191 ssb_write32(dev, SSB_TMSLOW,
1192 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1193 SSB_TMSLOW_FGC | core_specific_flags);
1194 ssb_flush_tmslow(dev);
1195
1196 /* Clear SERR if set. This is a hw bug workaround. */
1197 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1198 ssb_write32(dev, SSB_TMSHIGH, 0);
1199
1200 val = ssb_read32(dev, SSB_IMSTATE);
1201 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1202 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1203 ssb_write32(dev, SSB_IMSTATE, val);
1204 }
1205
1206 ssb_write32(dev, SSB_TMSLOW,
1207 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1208 core_specific_flags);
1209 ssb_flush_tmslow(dev);
1210
1211 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1212 core_specific_flags);
1213 ssb_flush_tmslow(dev);
1214}
1215EXPORT_SYMBOL(ssb_device_enable);
1216
8c68bd40 1217/* Wait for bitmask in a register to get set or cleared.
61e115a5 1218 * timeout is in units of ten-microseconds */
8c68bd40
MB		 1219static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1220 int timeout, int set)
61e115a5
MB		 1221{
1222 int i;
1223 u32 val;
1224
1225 for (i = 0; i < timeout; i++) {
1226 val = ssb_read32(dev, reg);
1227 if (set) {
8c68bd40 1228 if ((val & bitmask) == bitmask)
61e115a5
MB		 1229 return 0;
1230 } else {
1231 if (!(val & bitmask))
1232 return 0;
1233 }
1234 udelay(10);
1235 }
1236 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1237 "register %04X to %s.\n",
1238 bitmask, reg, (set ? "set" : "clear"));
1239
1240 return -ETIMEDOUT;
1241}
1242
1243void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1244{
b1a1bcf7 1245 u32 reject, val;
61e115a5
MB		 1246
1247 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1248 return;
1249
1250 reject = ssb_tmslow_reject_bitmask(dev);
b1a1bcf7 1251
011d1835
RM		 1252 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1253 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1254 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1255 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1256
1257 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1258 val = ssb_read32(dev, SSB_IMSTATE);
1259 val |= SSB_IMSTATE_REJECT;
1260 ssb_write32(dev, SSB_IMSTATE, val);
1261 ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1262 0);
1263 }
b1a1bcf7 1264
011d1835
RM		 1265 ssb_write32(dev, SSB_TMSLOW,
1266 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1267 reject | SSB_TMSLOW_RESET |
1268 core_specific_flags);
1269 ssb_flush_tmslow(dev);
61e115a5 1270
011d1835
RM		 1271 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1272 val = ssb_read32(dev, SSB_IMSTATE);
1273 val &= ~SSB_IMSTATE_REJECT;
1274 ssb_write32(dev, SSB_IMSTATE, val);
1275 }
b1a1bcf7
RM		 1276 }
1277
61e115a5
MB		 1278 ssb_write32(dev, SSB_TMSLOW,
1279 reject | SSB_TMSLOW_RESET |
1280 core_specific_flags);
1281 ssb_flush_tmslow(dev);
1282}
1283EXPORT_SYMBOL(ssb_device_disable);
1284
04023afc
RM		 1285/* Some chipsets need routing known for PCIe and 64-bit DMA */
1286static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1287{
1288 u16 chip_id = dev->bus->chip_id;
1289
1290 if (dev->id.coreid == SSB_DEV_80211) {
1291 return (chip_id == 0x4322 || chip_id == 43221 ||
1292 chip_id == 43231 || chip_id == 43222);
1293 }
1294
1295 return 0;
1296}
1297
61e115a5
MB		 1298u32 ssb_dma_translation(struct ssb_device *dev)
1299{
1300 switch (dev->bus->bustype) {
1301 case SSB_BUSTYPE_SSB:
1302 return 0;
1303 case SSB_BUSTYPE_PCI:
04023afc
RM		 1304 if (pci_is_pcie(dev->bus->host_pci) &&
1305 ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
a9770a81 1306 return SSB_PCIE_DMA_H32;
04023afc
RM		 1307 } else {
1308 if (ssb_dma_translation_special_bit(dev))
1309 return SSB_PCIE_DMA_H32;
1310 else
1311 return SSB_PCI_DMA;
1312 }
f225763a
MB		 1313 default:
1314 __ssb_dma_not_implemented(dev);
61e115a5
MB		 1315 }
1316 return 0;
1317}
1318EXPORT_SYMBOL(ssb_dma_translation);
1319
61e115a5
MB		 1320int ssb_bus_may_powerdown(struct ssb_bus *bus)
1321{
1322 struct ssb_chipcommon *cc;
1323 int err = 0;
1324
1325 /* On buses where more than one core may be working
1326 * at a time, we must not powerdown stuff if there are
1327 * still cores that may want to run. */
1328 if (bus->bustype == SSB_BUSTYPE_SSB)
1329 goto out;
1330
1331 cc = &bus->chipco;
881400a2
SB		 1332
1333 if (!cc->dev)
1334 goto out;
1335 if (cc->dev->id.revision < 5)
1336 goto out;
1337
61e115a5
MB		 1338 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1339 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1340 if (err)
1341 goto error;
1342out:
1343#ifdef CONFIG_SSB_DEBUG
1344 bus->powered_up = 0;
1345#endif
1346 return err;
1347error:
33a606ac 1348 ssb_err("Bus powerdown failed\n");
61e115a5
MB		 1349 goto out;
1350}
1351EXPORT_SYMBOL(ssb_bus_may_powerdown);
1352
1353int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1354{
61e115a5
MB		 1355 int err;
1356 enum ssb_clkmode mode;
1357
1358 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1359 if (err)
1360 goto error;
61e115a5
MB		 1361
1362#ifdef CONFIG_SSB_DEBUG
1363 bus->powered_up = 1;
1364#endif
a6ef8143
RM		 1365
1366 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1367 ssb_chipco_set_clockmode(&bus->chipco, mode);
1368
61e115a5
MB		 1369 return 0;
1370error:
33a606ac 1371 ssb_err("Bus powerup failed\n");
61e115a5
MB		 1372 return err;
1373}
1374EXPORT_SYMBOL(ssb_bus_powerup);
1375
8576f815
RM		 1376static void ssb_broadcast_value(struct ssb_device *dev,
1377 u32 address, u32 data)
1378{
1159024d 1379#ifdef CONFIG_SSB_DRIVER_PCICORE
8576f815
RM		 1380 /* This is used for both, PCI and ChipCommon core, so be careful. */
1381 BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1382 BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
1159024d 1383#endif
8576f815 1384
1159024d
JL		 1385 ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1386 ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1387 ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1388 ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
8576f815
RM		 1389}
1390
1391void ssb_commit_settings(struct ssb_bus *bus)
1392{
1393 struct ssb_device *dev;
1394
1159024d 1395#ifdef CONFIG_SSB_DRIVER_PCICORE
8576f815 1396 dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
1159024d
JL		 1397#else
1398 dev = bus->chipco.dev;
1399#endif
8576f815
RM		 1400 if (WARN_ON(!dev))
1401 return;
1402 /* This forces an update of the cached registers. */
1403 ssb_broadcast_value(dev, 0xFD8, 0);
1404}
1405EXPORT_SYMBOL(ssb_commit_settings);
1406
61e115a5
MB		 1407u32 ssb_admatch_base(u32 adm)
1408{
1409 u32 base = 0;
1410
1411 switch (adm & SSB_ADM_TYPE) {
1412 case SSB_ADM_TYPE0:
1413 base = (adm & SSB_ADM_BASE0);
1414 break;
1415 case SSB_ADM_TYPE1:
1416 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1417 base = (adm & SSB_ADM_BASE1);
1418 break;
1419 case SSB_ADM_TYPE2:
1420 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1421 base = (adm & SSB_ADM_BASE2);
1422 break;
1423 default:
1424 SSB_WARN_ON(1);
1425 }
1426
1427 return base;
1428}
1429EXPORT_SYMBOL(ssb_admatch_base);
1430
1431u32 ssb_admatch_size(u32 adm)
1432{
1433 u32 size = 0;
1434
1435 switch (adm & SSB_ADM_TYPE) {
1436 case SSB_ADM_TYPE0:
1437 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1438 break;
1439 case SSB_ADM_TYPE1:
1440 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1441 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1442 break;
1443 case SSB_ADM_TYPE2:
1444 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1445 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1446 break;
1447 default:
1448 SSB_WARN_ON(1);
1449 }
1450 size = (1 << (size + 1));
1451
1452 return size;
1453}
1454EXPORT_SYMBOL(ssb_admatch_size);
1455
1456static int __init ssb_modinit(void)
1457{
1458 int err;
1459
1460 /* See the comment at the ssb_is_early_boot definition */
1461 ssb_is_early_boot = 0;
1462 err = bus_register(&ssb_bustype);
1463 if (err)
1464 return err;
1465
1466 /* Maybe we already registered some buses at early boot.
1467 * Check for this and attach them
1468 */
1469 ssb_buses_lock();
1470 err = ssb_attach_queued_buses();
1471 ssb_buses_unlock();
e6c463e3 1472 if (err) {
61e115a5 1473 bus_unregister(&ssb_bustype);
e6c463e3
MB		 1474 goto out;
1475 }
61e115a5
MB		 1476
1477 err = b43_pci_ssb_bridge_init();
1478 if (err) {
33a606ac 1479 ssb_err("Broadcom 43xx PCI-SSB-bridge initialization failed\n");
aab547ce
MB		 1480 /* don't fail SSB init because of this */
1481 err = 0;
1482 }
1483 err = ssb_gige_init();
1484 if (err) {
33a606ac 1485 ssb_err("SSB Broadcom Gigabit Ethernet driver initialization failed\n");
61e115a5
MB		 1486 /* don't fail SSB init because of this */
1487 err = 0;
1488 }
e6c463e3 1489out:
61e115a5
MB		 1490 return err;
1491}
8d8c90e3
MB		 1492/* ssb must be initialized after PCI but before the ssb drivers.
1493 * That means we must use some initcall between subsys_initcall
1494 * and device_initcall. */
1495fs_initcall(ssb_modinit);
61e115a5
MB		 1496
1497static void __exit ssb_modexit(void)
1498{
aab547ce 1499 ssb_gige_exit();
61e115a5
MB		 1500 b43_pci_ssb_bridge_exit();
1501 bus_unregister(&ssb_bustype);
1502}
1503module_exit(ssb_modexit)
Linux 6.x block layer and io_uring tree(s)