blob: 57b7b6460896a271d972ac4b998693901bac6a9a [file] [log] [blame]
Michael Buesch61e115a2007-09-18 15:12:50 -04001/*
2 * Sonics Silicon Backplane
3 * Subsystem core
4 *
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
7 *
8 * Licensed under the GNU/GPL. See COPYING for details.
9 */
10
11#include "ssb_private.h"
12
13#include <linux/delay.h>
Geert Uytterhoeven6faf0352007-10-13 14:31:31 +020014#include <linux/io.h>
Michael Buesch61e115a2007-09-18 15:12:50 -040015#include <linux/ssb/ssb.h>
16#include <linux/ssb/ssb_regs.h>
Michael Bueschaab547c2008-02-29 11:36:12 +010017#include <linux/ssb/ssb_driver_gige.h>
Michael Buesch61e115a2007-09-18 15:12:50 -040018#include <linux/dma-mapping.h>
19#include <linux/pci.h>
Albert Herranz24ea6022009-09-08 19:30:12 +020020#include <linux/mmc/sdio_func.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090021#include <linux/slab.h>
Michael Buesch61e115a2007-09-18 15:12:50 -040022
Michael Buesch61e115a2007-09-18 15:12:50 -040023#include <pcmcia/cistpl.h>
24#include <pcmcia/ds.h>
25
26
27MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
28MODULE_LICENSE("GPL");
29
30
31/* Temporary list of yet-to-be-attached buses */
32static LIST_HEAD(attach_queue);
33/* List if running buses */
34static LIST_HEAD(buses);
35/* Software ID counter */
36static unsigned int next_busnumber;
37/* buses_mutes locks the two buslists and the next_busnumber.
38 * Don't lock this directly, but use ssb_buses_[un]lock() below. */
39static DEFINE_MUTEX(buses_mutex);
40
41/* There are differences in the codeflow, if the bus is
42 * initialized from early boot, as various needed services
43 * are not available early. This is a mechanism to delay
44 * these initializations to after early boot has finished.
45 * It's also used to avoid mutex locking, as that's not
46 * available and needed early. */
47static bool ssb_is_early_boot = 1;
48
49static void ssb_buses_lock(void);
50static void ssb_buses_unlock(void);
51
52
53#ifdef CONFIG_SSB_PCIHOST
54struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
55{
56 struct ssb_bus *bus;
57
58 ssb_buses_lock();
59 list_for_each_entry(bus, &buses, list) {
60 if (bus->bustype == SSB_BUSTYPE_PCI &&
61 bus->host_pci == pdev)
62 goto found;
63 }
64 bus = NULL;
65found:
66 ssb_buses_unlock();
67
68 return bus;
69}
70#endif /* CONFIG_SSB_PCIHOST */
71
Michael Buesche7ec2e32008-03-10 17:26:32 +010072#ifdef CONFIG_SSB_PCMCIAHOST
73struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
74{
75 struct ssb_bus *bus;
76
77 ssb_buses_lock();
78 list_for_each_entry(bus, &buses, list) {
79 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
80 bus->host_pcmcia == pdev)
81 goto found;
82 }
83 bus = NULL;
84found:
85 ssb_buses_unlock();
86
87 return bus;
88}
89#endif /* CONFIG_SSB_PCMCIAHOST */
90
Albert Herranz24ea6022009-09-08 19:30:12 +020091#ifdef CONFIG_SSB_SDIOHOST
92struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
93{
94 struct ssb_bus *bus;
95
96 ssb_buses_lock();
97 list_for_each_entry(bus, &buses, list) {
98 if (bus->bustype == SSB_BUSTYPE_SDIO &&
99 bus->host_sdio == func)
100 goto found;
101 }
102 bus = NULL;
103found:
104 ssb_buses_unlock();
105
106 return bus;
107}
108#endif /* CONFIG_SSB_SDIOHOST */
109
Michael Bueschaab547c2008-02-29 11:36:12 +0100110int ssb_for_each_bus_call(unsigned long data,
111 int (*func)(struct ssb_bus *bus, unsigned long data))
112{
113 struct ssb_bus *bus;
114 int res;
115
116 ssb_buses_lock();
117 list_for_each_entry(bus, &buses, list) {
118 res = func(bus, data);
119 if (res >= 0) {
120 ssb_buses_unlock();
121 return res;
122 }
123 }
124 ssb_buses_unlock();
125
126 return -ENODEV;
127}
128
Michael Buesch61e115a2007-09-18 15:12:50 -0400129static struct ssb_device *ssb_device_get(struct ssb_device *dev)
130{
131 if (dev)
132 get_device(dev->dev);
133 return dev;
134}
135
136static void ssb_device_put(struct ssb_device *dev)
137{
138 if (dev)
139 put_device(dev->dev);
140}
141
Michael Buesch3ba60182009-11-23 20:12:13 +0100142static inline struct ssb_driver *ssb_driver_get(struct ssb_driver *drv)
143{
144 if (drv)
145 get_driver(&drv->drv);
146 return drv;
147}
148
149static inline void ssb_driver_put(struct ssb_driver *drv)
150{
151 if (drv)
152 put_driver(&drv->drv);
153}
154
Michael Buesch61e115a2007-09-18 15:12:50 -0400155static int ssb_device_resume(struct device *dev)
156{
157 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
158 struct ssb_driver *ssb_drv;
Michael Buesch61e115a2007-09-18 15:12:50 -0400159 int err = 0;
160
Michael Buesch61e115a2007-09-18 15:12:50 -0400161 if (dev->driver) {
162 ssb_drv = drv_to_ssb_drv(dev->driver);
163 if (ssb_drv && ssb_drv->resume)
164 err = ssb_drv->resume(ssb_dev);
165 if (err)
166 goto out;
167 }
168out:
169 return err;
170}
171
Michael Buesch61e115a2007-09-18 15:12:50 -0400172static int ssb_device_suspend(struct device *dev, pm_message_t state)
173{
174 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
175 struct ssb_driver *ssb_drv;
Michael Buesch61e115a2007-09-18 15:12:50 -0400176 int err = 0;
177
178 if (dev->driver) {
179 ssb_drv = drv_to_ssb_drv(dev->driver);
180 if (ssb_drv && ssb_drv->suspend)
181 err = ssb_drv->suspend(ssb_dev, state);
182 if (err)
183 goto out;
184 }
Michael Buesch61e115a2007-09-18 15:12:50 -0400185out:
186 return err;
187}
188
Michael Buesch8fe2b652008-03-30 00:10:50 +0100189int ssb_bus_resume(struct ssb_bus *bus)
190{
191 int err;
192
193 /* Reset HW state information in memory, so that HW is
194 * completely reinitialized. */
195 bus->mapped_device = NULL;
196#ifdef CONFIG_SSB_DRIVER_PCICORE
197 bus->pcicore.setup_done = 0;
198#endif
199
200 err = ssb_bus_powerup(bus, 0);
201 if (err)
202 return err;
203 err = ssb_pcmcia_hardware_setup(bus);
204 if (err) {
205 ssb_bus_may_powerdown(bus);
206 return err;
207 }
208 ssb_chipco_resume(&bus->chipco);
209 ssb_bus_may_powerdown(bus);
210
211 return 0;
212}
213EXPORT_SYMBOL(ssb_bus_resume);
214
215int ssb_bus_suspend(struct ssb_bus *bus)
216{
217 ssb_chipco_suspend(&bus->chipco);
218 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
219
220 return 0;
221}
222EXPORT_SYMBOL(ssb_bus_suspend);
223
Michael Bueschd72bb402008-04-02 17:03:26 +0200224#ifdef CONFIG_SSB_SPROM
Michael Buesch3ba60182009-11-23 20:12:13 +0100225/** ssb_devices_freeze - Freeze all devices on the bus.
226 *
227 * After freezing no device driver will be handling a device
228 * on this bus anymore. ssb_devices_thaw() must be called after
229 * a successful freeze to reactivate the devices.
230 *
231 * @bus: The bus.
232 * @ctx: Context structure. Pass this to ssb_devices_thaw().
233 */
234int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
Michael Buesch61e115a2007-09-18 15:12:50 -0400235{
Michael Buesch3ba60182009-11-23 20:12:13 +0100236 struct ssb_device *sdev;
237 struct ssb_driver *sdrv;
238 unsigned int i;
Michael Buesch61e115a2007-09-18 15:12:50 -0400239
Michael Buesch3ba60182009-11-23 20:12:13 +0100240 memset(ctx, 0, sizeof(*ctx));
241 ctx->bus = bus;
242 SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
243
Michael Buesch61e115a2007-09-18 15:12:50 -0400244 for (i = 0; i < bus->nr_devices; i++) {
Michael Buesch3ba60182009-11-23 20:12:13 +0100245 sdev = ssb_device_get(&bus->devices[i]);
246
247 if (!sdev->dev || !sdev->dev->driver ||
248 !device_is_registered(sdev->dev)) {
249 ssb_device_put(sdev);
Michael Buesch61e115a2007-09-18 15:12:50 -0400250 continue;
Michael Buesch61e115a2007-09-18 15:12:50 -0400251 }
Michael Buesch3ba60182009-11-23 20:12:13 +0100252 sdrv = ssb_driver_get(drv_to_ssb_drv(sdev->dev->driver));
253 if (!sdrv || SSB_WARN_ON(!sdrv->remove)) {
254 ssb_device_put(sdev);
Michael Buesch61e115a2007-09-18 15:12:50 -0400255 continue;
Michael Buesch61e115a2007-09-18 15:12:50 -0400256 }
Michael Buesch3ba60182009-11-23 20:12:13 +0100257 sdrv->remove(sdev);
258 ctx->device_frozen[i] = 1;
Michael Buesch61e115a2007-09-18 15:12:50 -0400259 }
260
261 return 0;
Michael Buesch61e115a2007-09-18 15:12:50 -0400262}
263
Michael Buesch3ba60182009-11-23 20:12:13 +0100264/** ssb_devices_thaw - Unfreeze all devices on the bus.
265 *
266 * This will re-attach the device drivers and re-init the devices.
267 *
268 * @ctx: The context structure from ssb_devices_freeze()
269 */
270int ssb_devices_thaw(struct ssb_freeze_context *ctx)
Michael Buesch61e115a2007-09-18 15:12:50 -0400271{
Michael Buesch3ba60182009-11-23 20:12:13 +0100272 struct ssb_bus *bus = ctx->bus;
273 struct ssb_device *sdev;
274 struct ssb_driver *sdrv;
275 unsigned int i;
276 int err, result = 0;
Michael Buesch61e115a2007-09-18 15:12:50 -0400277
278 for (i = 0; i < bus->nr_devices; i++) {
Michael Buesch3ba60182009-11-23 20:12:13 +0100279 if (!ctx->device_frozen[i])
Michael Buesch61e115a2007-09-18 15:12:50 -0400280 continue;
Michael Buesch3ba60182009-11-23 20:12:13 +0100281 sdev = &bus->devices[i];
282
283 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
Michael Buesch61e115a2007-09-18 15:12:50 -0400284 continue;
Michael Buesch3ba60182009-11-23 20:12:13 +0100285 sdrv = drv_to_ssb_drv(sdev->dev->driver);
286 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
Michael Buesch61e115a2007-09-18 15:12:50 -0400287 continue;
Michael Buesch3ba60182009-11-23 20:12:13 +0100288
289 err = sdrv->probe(sdev, &sdev->id);
Michael Buesch61e115a2007-09-18 15:12:50 -0400290 if (err) {
291 ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
Michael Buesch3ba60182009-11-23 20:12:13 +0100292 dev_name(sdev->dev));
293 result = err;
Michael Buesch61e115a2007-09-18 15:12:50 -0400294 }
Michael Buesch3ba60182009-11-23 20:12:13 +0100295 ssb_driver_put(sdrv);
296 ssb_device_put(sdev);
Michael Buesch61e115a2007-09-18 15:12:50 -0400297 }
298
Michael Buesch3ba60182009-11-23 20:12:13 +0100299 return result;
Michael Buesch61e115a2007-09-18 15:12:50 -0400300}
Michael Bueschd72bb402008-04-02 17:03:26 +0200301#endif /* CONFIG_SSB_SPROM */
Michael Buesch61e115a2007-09-18 15:12:50 -0400302
303static void ssb_device_shutdown(struct device *dev)
304{
305 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
306 struct ssb_driver *ssb_drv;
307
308 if (!dev->driver)
309 return;
310 ssb_drv = drv_to_ssb_drv(dev->driver);
311 if (ssb_drv && ssb_drv->shutdown)
312 ssb_drv->shutdown(ssb_dev);
313}
314
315static int ssb_device_remove(struct device *dev)
316{
317 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
318 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
319
320 if (ssb_drv && ssb_drv->remove)
321 ssb_drv->remove(ssb_dev);
322 ssb_device_put(ssb_dev);
323
324 return 0;
325}
326
327static int ssb_device_probe(struct device *dev)
328{
329 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
330 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
331 int err = 0;
332
333 ssb_device_get(ssb_dev);
334 if (ssb_drv && ssb_drv->probe)
335 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
336 if (err)
337 ssb_device_put(ssb_dev);
338
339 return err;
340}
341
342static int ssb_match_devid(const struct ssb_device_id *tabid,
343 const struct ssb_device_id *devid)
344{
345 if ((tabid->vendor != devid->vendor) &&
346 tabid->vendor != SSB_ANY_VENDOR)
347 return 0;
348 if ((tabid->coreid != devid->coreid) &&
349 tabid->coreid != SSB_ANY_ID)
350 return 0;
351 if ((tabid->revision != devid->revision) &&
352 tabid->revision != SSB_ANY_REV)
353 return 0;
354 return 1;
355}
356
357static int ssb_bus_match(struct device *dev, struct device_driver *drv)
358{
359 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
360 struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
361 const struct ssb_device_id *id;
362
363 for (id = ssb_drv->id_table;
364 id->vendor || id->coreid || id->revision;
365 id++) {
366 if (ssb_match_devid(id, &ssb_dev->id))
367 return 1; /* found */
368 }
369
370 return 0;
371}
372
Al Viro7ac03262007-10-14 05:46:09 +0100373static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
Michael Buesch61e115a2007-09-18 15:12:50 -0400374{
375 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
Michael Buesch61e115a2007-09-18 15:12:50 -0400376
377 if (!dev)
378 return -ENODEV;
379
Al Viro7ac03262007-10-14 05:46:09 +0100380 return add_uevent_var(env,
Michael Buesch61e115a2007-09-18 15:12:50 -0400381 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
382 ssb_dev->id.vendor, ssb_dev->id.coreid,
383 ssb_dev->id.revision);
Michael Buesch61e115a2007-09-18 15:12:50 -0400384}
385
Hauke Mehrtensaa3bf282010-11-28 12:22:52 +0100386#define ssb_config_attr(attrib, field, format_string) \
387static ssize_t \
388attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
389{ \
390 return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
391}
392
393ssb_config_attr(core_num, core_index, "%u\n")
394ssb_config_attr(coreid, id.coreid, "0x%04x\n")
395ssb_config_attr(vendor, id.vendor, "0x%04x\n")
396ssb_config_attr(revision, id.revision, "%u\n")
397ssb_config_attr(irq, irq, "%u\n")
398static ssize_t
399name_show(struct device *dev, struct device_attribute *attr, char *buf)
400{
401 return sprintf(buf, "%s\n",
402 ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
403}
404
405static struct device_attribute ssb_device_attrs[] = {
406 __ATTR_RO(name),
407 __ATTR_RO(core_num),
408 __ATTR_RO(coreid),
409 __ATTR_RO(vendor),
410 __ATTR_RO(revision),
411 __ATTR_RO(irq),
412 __ATTR_NULL,
413};
414
Michael Buesch61e115a2007-09-18 15:12:50 -0400415static struct bus_type ssb_bustype = {
416 .name = "ssb",
417 .match = ssb_bus_match,
418 .probe = ssb_device_probe,
419 .remove = ssb_device_remove,
420 .shutdown = ssb_device_shutdown,
421 .suspend = ssb_device_suspend,
422 .resume = ssb_device_resume,
423 .uevent = ssb_device_uevent,
Hauke Mehrtensaa3bf282010-11-28 12:22:52 +0100424 .dev_attrs = ssb_device_attrs,
Michael Buesch61e115a2007-09-18 15:12:50 -0400425};
426
427static void ssb_buses_lock(void)
428{
429 /* See the comment at the ssb_is_early_boot definition */
430 if (!ssb_is_early_boot)
431 mutex_lock(&buses_mutex);
432}
433
434static void ssb_buses_unlock(void)
435{
436 /* See the comment at the ssb_is_early_boot definition */
437 if (!ssb_is_early_boot)
438 mutex_unlock(&buses_mutex);
439}
440
441static void ssb_devices_unregister(struct ssb_bus *bus)
442{
443 struct ssb_device *sdev;
444 int i;
445
446 for (i = bus->nr_devices - 1; i >= 0; i--) {
447 sdev = &(bus->devices[i]);
448 if (sdev->dev)
449 device_unregister(sdev->dev);
450 }
451}
452
453void ssb_bus_unregister(struct ssb_bus *bus)
454{
455 ssb_buses_lock();
456 ssb_devices_unregister(bus);
457 list_del(&bus->list);
458 ssb_buses_unlock();
459
Michael Buesche7ec2e32008-03-10 17:26:32 +0100460 ssb_pcmcia_exit(bus);
Michael Buesch61e115a2007-09-18 15:12:50 -0400461 ssb_pci_exit(bus);
462 ssb_iounmap(bus);
463}
464EXPORT_SYMBOL(ssb_bus_unregister);
465
466static void ssb_release_dev(struct device *dev)
467{
468 struct __ssb_dev_wrapper *devwrap;
469
470 devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
471 kfree(devwrap);
472}
473
474static int ssb_devices_register(struct ssb_bus *bus)
475{
476 struct ssb_device *sdev;
477 struct device *dev;
478 struct __ssb_dev_wrapper *devwrap;
479 int i, err = 0;
480 int dev_idx = 0;
481
482 for (i = 0; i < bus->nr_devices; i++) {
483 sdev = &(bus->devices[i]);
484
485 /* We don't register SSB-system devices to the kernel,
486 * as the drivers for them are built into SSB. */
487 switch (sdev->id.coreid) {
488 case SSB_DEV_CHIPCOMMON:
489 case SSB_DEV_PCI:
490 case SSB_DEV_PCIE:
491 case SSB_DEV_PCMCIA:
492 case SSB_DEV_MIPS:
493 case SSB_DEV_MIPS_3302:
494 case SSB_DEV_EXTIF:
495 continue;
496 }
497
498 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
499 if (!devwrap) {
500 ssb_printk(KERN_ERR PFX
501 "Could not allocate device\n");
502 err = -ENOMEM;
503 goto error;
504 }
505 dev = &devwrap->dev;
506 devwrap->sdev = sdev;
507
508 dev->release = ssb_release_dev;
509 dev->bus = &ssb_bustype;
Kay Sieversb7b05fe2008-10-30 15:51:57 +0100510 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
Michael Buesch61e115a2007-09-18 15:12:50 -0400511
512 switch (bus->bustype) {
513 case SSB_BUSTYPE_PCI:
514#ifdef CONFIG_SSB_PCIHOST
515 sdev->irq = bus->host_pci->irq;
516 dev->parent = &bus->host_pci->dev;
FUJITA Tomonori14f92952010-06-03 19:37:27 -0700517 sdev->dma_dev = dev->parent;
Michael Buesch61e115a2007-09-18 15:12:50 -0400518#endif
519 break;
520 case SSB_BUSTYPE_PCMCIA:
521#ifdef CONFIG_SSB_PCMCIAHOST
Dominik Brodowskieb141202010-03-07 12:21:16 +0100522 sdev->irq = bus->host_pcmcia->irq;
Michael Buesch61e115a2007-09-18 15:12:50 -0400523 dev->parent = &bus->host_pcmcia->dev;
524#endif
525 break;
Albert Herranz24ea6022009-09-08 19:30:12 +0200526 case SSB_BUSTYPE_SDIO:
Michael Buesch391ae222010-02-03 18:24:35 +0100527#ifdef CONFIG_SSB_SDIOHOST
Albert Herranz24ea6022009-09-08 19:30:12 +0200528 dev->parent = &bus->host_sdio->dev;
529#endif
530 break;
Michael Buesch61e115a2007-09-18 15:12:50 -0400531 case SSB_BUSTYPE_SSB:
Aurelien Jarnoac82da32008-09-26 22:27:11 +0200532 dev->dma_mask = &dev->coherent_dma_mask;
FUJITA Tomonori14f92952010-06-03 19:37:27 -0700533 sdev->dma_dev = dev;
Michael Buesch61e115a2007-09-18 15:12:50 -0400534 break;
535 }
536
537 sdev->dev = dev;
538 err = device_register(dev);
539 if (err) {
540 ssb_printk(KERN_ERR PFX
541 "Could not register %s\n",
Kay Sieversb7b05fe2008-10-30 15:51:57 +0100542 dev_name(dev));
Michael Buesch61e115a2007-09-18 15:12:50 -0400543 /* Set dev to NULL to not unregister
544 * dev on error unwinding. */
545 sdev->dev = NULL;
546 kfree(devwrap);
547 goto error;
548 }
549 dev_idx++;
550 }
551
552 return 0;
553error:
554 /* Unwind the already registered devices. */
555 ssb_devices_unregister(bus);
556 return err;
557}
558
559/* Needs ssb_buses_lock() */
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200560static int __devinit ssb_attach_queued_buses(void)
Michael Buesch61e115a2007-09-18 15:12:50 -0400561{
562 struct ssb_bus *bus, *n;
563 int err = 0;
564 int drop_them_all = 0;
565
566 list_for_each_entry_safe(bus, n, &attach_queue, list) {
567 if (drop_them_all) {
568 list_del(&bus->list);
569 continue;
570 }
571 /* Can't init the PCIcore in ssb_bus_register(), as that
572 * is too early in boot for embedded systems
573 * (no udelay() available). So do it here in attach stage.
574 */
575 err = ssb_bus_powerup(bus, 0);
576 if (err)
577 goto error;
578 ssb_pcicore_init(&bus->pcicore);
579 ssb_bus_may_powerdown(bus);
580
581 err = ssb_devices_register(bus);
582error:
583 if (err) {
584 drop_them_all = 1;
585 list_del(&bus->list);
586 continue;
587 }
588 list_move_tail(&bus->list, &buses);
589 }
590
591 return err;
592}
593
Michael Bueschffc76892008-02-20 19:08:10 +0100594static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
595{
596 struct ssb_bus *bus = dev->bus;
597
598 offset += dev->core_index * SSB_CORE_SIZE;
599 return readb(bus->mmio + offset);
600}
601
Michael Buesch61e115a2007-09-18 15:12:50 -0400602static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
603{
604 struct ssb_bus *bus = dev->bus;
605
606 offset += dev->core_index * SSB_CORE_SIZE;
607 return readw(bus->mmio + offset);
608}
609
610static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
611{
612 struct ssb_bus *bus = dev->bus;
613
614 offset += dev->core_index * SSB_CORE_SIZE;
615 return readl(bus->mmio + offset);
616}
617
Michael Bueschd625a292008-04-02 19:46:56 +0200618#ifdef CONFIG_SSB_BLOCKIO
619static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
620 size_t count, u16 offset, u8 reg_width)
621{
622 struct ssb_bus *bus = dev->bus;
623 void __iomem *addr;
624
625 offset += dev->core_index * SSB_CORE_SIZE;
626 addr = bus->mmio + offset;
627
628 switch (reg_width) {
629 case sizeof(u8): {
630 u8 *buf = buffer;
631
632 while (count) {
633 *buf = __raw_readb(addr);
634 buf++;
635 count--;
636 }
637 break;
638 }
639 case sizeof(u16): {
640 __le16 *buf = buffer;
641
642 SSB_WARN_ON(count & 1);
643 while (count) {
644 *buf = (__force __le16)__raw_readw(addr);
645 buf++;
646 count -= 2;
647 }
648 break;
649 }
650 case sizeof(u32): {
651 __le32 *buf = buffer;
652
653 SSB_WARN_ON(count & 3);
654 while (count) {
655 *buf = (__force __le32)__raw_readl(addr);
656 buf++;
657 count -= 4;
658 }
659 break;
660 }
661 default:
662 SSB_WARN_ON(1);
663 }
664}
665#endif /* CONFIG_SSB_BLOCKIO */
666
Michael Bueschffc76892008-02-20 19:08:10 +0100667static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
668{
669 struct ssb_bus *bus = dev->bus;
670
671 offset += dev->core_index * SSB_CORE_SIZE;
672 writeb(value, bus->mmio + offset);
673}
674
Michael Buesch61e115a2007-09-18 15:12:50 -0400675static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
676{
677 struct ssb_bus *bus = dev->bus;
678
679 offset += dev->core_index * SSB_CORE_SIZE;
680 writew(value, bus->mmio + offset);
681}
682
683static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
684{
685 struct ssb_bus *bus = dev->bus;
686
687 offset += dev->core_index * SSB_CORE_SIZE;
688 writel(value, bus->mmio + offset);
689}
690
Michael Bueschd625a292008-04-02 19:46:56 +0200691#ifdef CONFIG_SSB_BLOCKIO
692static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
693 size_t count, u16 offset, u8 reg_width)
694{
695 struct ssb_bus *bus = dev->bus;
696 void __iomem *addr;
697
698 offset += dev->core_index * SSB_CORE_SIZE;
699 addr = bus->mmio + offset;
700
701 switch (reg_width) {
702 case sizeof(u8): {
703 const u8 *buf = buffer;
704
705 while (count) {
706 __raw_writeb(*buf, addr);
707 buf++;
708 count--;
709 }
710 break;
711 }
712 case sizeof(u16): {
713 const __le16 *buf = buffer;
714
715 SSB_WARN_ON(count & 1);
716 while (count) {
717 __raw_writew((__force u16)(*buf), addr);
718 buf++;
719 count -= 2;
720 }
721 break;
722 }
723 case sizeof(u32): {
724 const __le32 *buf = buffer;
725
726 SSB_WARN_ON(count & 3);
727 while (count) {
728 __raw_writel((__force u32)(*buf), addr);
729 buf++;
730 count -= 4;
731 }
732 break;
733 }
734 default:
735 SSB_WARN_ON(1);
736 }
737}
738#endif /* CONFIG_SSB_BLOCKIO */
739
Michael Buesch61e115a2007-09-18 15:12:50 -0400740/* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
741static const struct ssb_bus_ops ssb_ssb_ops = {
Michael Bueschffc76892008-02-20 19:08:10 +0100742 .read8 = ssb_ssb_read8,
Michael Buesch61e115a2007-09-18 15:12:50 -0400743 .read16 = ssb_ssb_read16,
744 .read32 = ssb_ssb_read32,
Michael Bueschffc76892008-02-20 19:08:10 +0100745 .write8 = ssb_ssb_write8,
Michael Buesch61e115a2007-09-18 15:12:50 -0400746 .write16 = ssb_ssb_write16,
747 .write32 = ssb_ssb_write32,
Michael Bueschd625a292008-04-02 19:46:56 +0200748#ifdef CONFIG_SSB_BLOCKIO
749 .block_read = ssb_ssb_block_read,
750 .block_write = ssb_ssb_block_write,
751#endif
Michael Buesch61e115a2007-09-18 15:12:50 -0400752};
753
754static int ssb_fetch_invariants(struct ssb_bus *bus,
755 ssb_invariants_func_t get_invariants)
756{
757 struct ssb_init_invariants iv;
758 int err;
759
760 memset(&iv, 0, sizeof(iv));
761 err = get_invariants(bus, &iv);
762 if (err)
763 goto out;
764 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
765 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
Michael Buesch7cb44612008-02-19 17:46:48 +0100766 bus->has_cardbus_slot = iv.has_cardbus_slot;
Michael Buesch61e115a2007-09-18 15:12:50 -0400767out:
768 return err;
769}
770
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200771static int __devinit ssb_bus_register(struct ssb_bus *bus,
772 ssb_invariants_func_t get_invariants,
773 unsigned long baseaddr)
Michael Buesch61e115a2007-09-18 15:12:50 -0400774{
775 int err;
776
777 spin_lock_init(&bus->bar_lock);
778 INIT_LIST_HEAD(&bus->list);
Michael Buesch53521d82008-02-19 16:22:50 +0100779#ifdef CONFIG_SSB_EMBEDDED
780 spin_lock_init(&bus->gpio_lock);
781#endif
Michael Buesch61e115a2007-09-18 15:12:50 -0400782
783 /* Powerup the bus */
784 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
785 if (err)
786 goto out;
Albert Herranz24ea6022009-09-08 19:30:12 +0200787
788 /* Init SDIO-host device (if any), before the scan */
789 err = ssb_sdio_init(bus);
790 if (err)
791 goto err_disable_xtal;
792
Michael Buesch61e115a2007-09-18 15:12:50 -0400793 ssb_buses_lock();
794 bus->busnumber = next_busnumber;
795 /* Scan for devices (cores) */
796 err = ssb_bus_scan(bus, baseaddr);
797 if (err)
Albert Herranz24ea6022009-09-08 19:30:12 +0200798 goto err_sdio_exit;
Michael Buesch61e115a2007-09-18 15:12:50 -0400799
800 /* Init PCI-host device (if any) */
801 err = ssb_pci_init(bus);
802 if (err)
803 goto err_unmap;
804 /* Init PCMCIA-host device (if any) */
805 err = ssb_pcmcia_init(bus);
806 if (err)
807 goto err_pci_exit;
808
809 /* Initialize basic system devices (if available) */
810 err = ssb_bus_powerup(bus, 0);
811 if (err)
812 goto err_pcmcia_exit;
813 ssb_chipcommon_init(&bus->chipco);
814 ssb_mipscore_init(&bus->mipscore);
815 err = ssb_fetch_invariants(bus, get_invariants);
816 if (err) {
817 ssb_bus_may_powerdown(bus);
818 goto err_pcmcia_exit;
819 }
820 ssb_bus_may_powerdown(bus);
821
822 /* Queue it for attach.
823 * See the comment at the ssb_is_early_boot definition. */
824 list_add_tail(&bus->list, &attach_queue);
825 if (!ssb_is_early_boot) {
826 /* This is not early boot, so we must attach the bus now */
827 err = ssb_attach_queued_buses();
828 if (err)
829 goto err_dequeue;
830 }
831 next_busnumber++;
832 ssb_buses_unlock();
833
834out:
835 return err;
836
837err_dequeue:
838 list_del(&bus->list);
839err_pcmcia_exit:
Michael Buesche7ec2e32008-03-10 17:26:32 +0100840 ssb_pcmcia_exit(bus);
Michael Buesch61e115a2007-09-18 15:12:50 -0400841err_pci_exit:
842 ssb_pci_exit(bus);
843err_unmap:
844 ssb_iounmap(bus);
Albert Herranz24ea6022009-09-08 19:30:12 +0200845err_sdio_exit:
846 ssb_sdio_exit(bus);
Michael Buesch61e115a2007-09-18 15:12:50 -0400847err_disable_xtal:
848 ssb_buses_unlock();
849 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
850 return err;
851}
852
853#ifdef CONFIG_SSB_PCIHOST
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200854int __devinit ssb_bus_pcibus_register(struct ssb_bus *bus,
855 struct pci_dev *host_pci)
Michael Buesch61e115a2007-09-18 15:12:50 -0400856{
857 int err;
858
859 bus->bustype = SSB_BUSTYPE_PCI;
860 bus->host_pci = host_pci;
861 bus->ops = &ssb_pci_ops;
862
863 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
864 if (!err) {
865 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
Kay Sieversb7b05fe2008-10-30 15:51:57 +0100866 "PCI device %s\n", dev_name(&host_pci->dev));
Larry Fingerce9626e2010-04-23 13:17:21 -0500867 } else {
868 ssb_printk(KERN_ERR PFX "Failed to register PCI version"
869 " of SSB with error %d\n", err);
Michael Buesch61e115a2007-09-18 15:12:50 -0400870 }
871
872 return err;
873}
874EXPORT_SYMBOL(ssb_bus_pcibus_register);
875#endif /* CONFIG_SSB_PCIHOST */
876
877#ifdef CONFIG_SSB_PCMCIAHOST
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200878int __devinit ssb_bus_pcmciabus_register(struct ssb_bus *bus,
879 struct pcmcia_device *pcmcia_dev,
880 unsigned long baseaddr)
Michael Buesch61e115a2007-09-18 15:12:50 -0400881{
882 int err;
883
884 bus->bustype = SSB_BUSTYPE_PCMCIA;
885 bus->host_pcmcia = pcmcia_dev;
886 bus->ops = &ssb_pcmcia_ops;
887
888 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
889 if (!err) {
890 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
891 "PCMCIA device %s\n", pcmcia_dev->devname);
892 }
893
894 return err;
895}
896EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
897#endif /* CONFIG_SSB_PCMCIAHOST */
898
Albert Herranz24ea6022009-09-08 19:30:12 +0200899#ifdef CONFIG_SSB_SDIOHOST
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200900int __devinit ssb_bus_sdiobus_register(struct ssb_bus *bus,
901 struct sdio_func *func,
902 unsigned int quirks)
Albert Herranz24ea6022009-09-08 19:30:12 +0200903{
904 int err;
905
906 bus->bustype = SSB_BUSTYPE_SDIO;
907 bus->host_sdio = func;
908 bus->ops = &ssb_sdio_ops;
909 bus->quirks = quirks;
910
911 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
912 if (!err) {
913 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
914 "SDIO device %s\n", sdio_func_id(func));
915 }
916
917 return err;
918}
919EXPORT_SYMBOL(ssb_bus_sdiobus_register);
920#endif /* CONFIG_SSB_PCMCIAHOST */
921
Hauke Mehrtenscd155982011-06-21 20:57:16 +0200922int __devinit ssb_bus_ssbbus_register(struct ssb_bus *bus,
923 unsigned long baseaddr,
924 ssb_invariants_func_t get_invariants)
Michael Buesch61e115a2007-09-18 15:12:50 -0400925{
926 int err;
927
928 bus->bustype = SSB_BUSTYPE_SSB;
929 bus->ops = &ssb_ssb_ops;
930
931 err = ssb_bus_register(bus, get_invariants, baseaddr);
932 if (!err) {
933 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
934 "address 0x%08lX\n", baseaddr);
935 }
936
937 return err;
938}
939
940int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
941{
942 drv->drv.name = drv->name;
943 drv->drv.bus = &ssb_bustype;
944 drv->drv.owner = owner;
945
946 return driver_register(&drv->drv);
947}
948EXPORT_SYMBOL(__ssb_driver_register);
949
950void ssb_driver_unregister(struct ssb_driver *drv)
951{
952 driver_unregister(&drv->drv);
953}
954EXPORT_SYMBOL(ssb_driver_unregister);
955
956void ssb_set_devtypedata(struct ssb_device *dev, void *data)
957{
958 struct ssb_bus *bus = dev->bus;
959 struct ssb_device *ent;
960 int i;
961
962 for (i = 0; i < bus->nr_devices; i++) {
963 ent = &(bus->devices[i]);
964 if (ent->id.vendor != dev->id.vendor)
965 continue;
966 if (ent->id.coreid != dev->id.coreid)
967 continue;
968
969 ent->devtypedata = data;
970 }
971}
972EXPORT_SYMBOL(ssb_set_devtypedata);
973
974static u32 clkfactor_f6_resolve(u32 v)
975{
976 /* map the magic values */
977 switch (v) {
978 case SSB_CHIPCO_CLK_F6_2:
979 return 2;
980 case SSB_CHIPCO_CLK_F6_3:
981 return 3;
982 case SSB_CHIPCO_CLK_F6_4:
983 return 4;
984 case SSB_CHIPCO_CLK_F6_5:
985 return 5;
986 case SSB_CHIPCO_CLK_F6_6:
987 return 6;
988 case SSB_CHIPCO_CLK_F6_7:
989 return 7;
990 }
991 return 0;
992}
993
994/* Calculate the speed the backplane would run at a given set of clockcontrol values */
995u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
996{
997 u32 n1, n2, clock, m1, m2, m3, mc;
998
999 n1 = (n & SSB_CHIPCO_CLK_N1);
1000 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
1001
1002 switch (plltype) {
1003 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
1004 if (m & SSB_CHIPCO_CLK_T6_MMASK)
Hauke Mehrtense913d462011-06-21 20:53:20 +02001005 return SSB_CHIPCO_CLK_T6_M1;
1006 return SSB_CHIPCO_CLK_T6_M0;
Michael Buesch61e115a2007-09-18 15:12:50 -04001007 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1008 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1009 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1010 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1011 n1 = clkfactor_f6_resolve(n1);
1012 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1013 break;
1014 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1015 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1016 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1017 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1018 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1019 break;
1020 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1021 return 100000000;
1022 default:
1023 SSB_WARN_ON(1);
1024 }
1025
1026 switch (plltype) {
1027 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1028 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1029 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1030 break;
1031 default:
1032 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1033 }
1034 if (!clock)
1035 return 0;
1036
1037 m1 = (m & SSB_CHIPCO_CLK_M1);
1038 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1039 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1040 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1041
1042 switch (plltype) {
1043 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1044 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1045 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1046 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1047 m1 = clkfactor_f6_resolve(m1);
1048 if ((plltype == SSB_PLLTYPE_1) ||
1049 (plltype == SSB_PLLTYPE_3))
1050 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1051 else
1052 m2 = clkfactor_f6_resolve(m2);
1053 m3 = clkfactor_f6_resolve(m3);
1054
1055 switch (mc) {
1056 case SSB_CHIPCO_CLK_MC_BYPASS:
1057 return clock;
1058 case SSB_CHIPCO_CLK_MC_M1:
1059 return (clock / m1);
1060 case SSB_CHIPCO_CLK_MC_M1M2:
1061 return (clock / (m1 * m2));
1062 case SSB_CHIPCO_CLK_MC_M1M2M3:
1063 return (clock / (m1 * m2 * m3));
1064 case SSB_CHIPCO_CLK_MC_M1M3:
1065 return (clock / (m1 * m3));
1066 }
1067 return 0;
1068 case SSB_PLLTYPE_2:
1069 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1070 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1071 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1072 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1073 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1074 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1075
1076 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1077 clock /= m1;
1078 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1079 clock /= m2;
1080 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1081 clock /= m3;
1082 return clock;
1083 default:
1084 SSB_WARN_ON(1);
1085 }
1086 return 0;
1087}
1088
1089/* Get the current speed the backplane is running at */
1090u32 ssb_clockspeed(struct ssb_bus *bus)
1091{
1092 u32 rate;
1093 u32 plltype;
1094 u32 clkctl_n, clkctl_m;
1095
1096 if (ssb_extif_available(&bus->extif))
1097 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1098 &clkctl_n, &clkctl_m);
1099 else if (bus->chipco.dev)
1100 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1101 &clkctl_n, &clkctl_m);
1102 else
1103 return 0;
1104
1105 if (bus->chip_id == 0x5365) {
1106 rate = 100000000;
1107 } else {
1108 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1109 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1110 rate /= 2;
1111 }
1112
1113 return rate;
1114}
1115EXPORT_SYMBOL(ssb_clockspeed);
1116
1117static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1118{
Larry Fingerc272ef42007-11-09 16:56:25 -06001119 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1120
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001121 /* The REJECT bit seems to be different for Backplane rev 2.3 */
Larry Fingerc272ef42007-11-09 16:56:25 -06001122 switch (rev) {
Michael Buesch61e115a2007-09-18 15:12:50 -04001123 case SSB_IDLOW_SSBREV_22:
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001124 case SSB_IDLOW_SSBREV_24:
1125 case SSB_IDLOW_SSBREV_26:
1126 return SSB_TMSLOW_REJECT;
Michael Buesch61e115a2007-09-18 15:12:50 -04001127 case SSB_IDLOW_SSBREV_23:
1128 return SSB_TMSLOW_REJECT_23;
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001129 case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */
Larry Fingerc272ef42007-11-09 16:56:25 -06001130 case SSB_IDLOW_SSBREV_27: /* same here */
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001131 return SSB_TMSLOW_REJECT; /* this is a guess */
Michael Buesch61e115a2007-09-18 15:12:50 -04001132 default:
Larry Fingerc272ef42007-11-09 16:56:25 -06001133 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
Michael Buesch61e115a2007-09-18 15:12:50 -04001134 WARN_ON(1);
1135 }
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001136 return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
Michael Buesch61e115a2007-09-18 15:12:50 -04001137}
1138
1139int ssb_device_is_enabled(struct ssb_device *dev)
1140{
1141 u32 val;
1142 u32 reject;
1143
1144 reject = ssb_tmslow_reject_bitmask(dev);
1145 val = ssb_read32(dev, SSB_TMSLOW);
1146 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1147
1148 return (val == SSB_TMSLOW_CLOCK);
1149}
1150EXPORT_SYMBOL(ssb_device_is_enabled);
1151
1152static void ssb_flush_tmslow(struct ssb_device *dev)
1153{
1154 /* Make _really_ sure the device has finished the TMSLOW
1155 * register write transaction, as we risk running into
1156 * a machine check exception otherwise.
1157 * Do this by reading the register back to commit the
1158 * PCI write and delay an additional usec for the device
1159 * to react to the change. */
1160 ssb_read32(dev, SSB_TMSLOW);
1161 udelay(1);
1162}
1163
1164void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1165{
1166 u32 val;
1167
1168 ssb_device_disable(dev, core_specific_flags);
1169 ssb_write32(dev, SSB_TMSLOW,
1170 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1171 SSB_TMSLOW_FGC | core_specific_flags);
1172 ssb_flush_tmslow(dev);
1173
1174 /* Clear SERR if set. This is a hw bug workaround. */
1175 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1176 ssb_write32(dev, SSB_TMSHIGH, 0);
1177
1178 val = ssb_read32(dev, SSB_IMSTATE);
1179 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1180 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1181 ssb_write32(dev, SSB_IMSTATE, val);
1182 }
1183
1184 ssb_write32(dev, SSB_TMSLOW,
1185 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1186 core_specific_flags);
1187 ssb_flush_tmslow(dev);
1188
1189 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1190 core_specific_flags);
1191 ssb_flush_tmslow(dev);
1192}
1193EXPORT_SYMBOL(ssb_device_enable);
1194
Michael Büsch8c68bd42011-02-15 00:21:50 +01001195/* Wait for bitmask in a register to get set or cleared.
Michael Buesch61e115a2007-09-18 15:12:50 -04001196 * timeout is in units of ten-microseconds */
Michael Büsch8c68bd42011-02-15 00:21:50 +01001197static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1198 int timeout, int set)
Michael Buesch61e115a2007-09-18 15:12:50 -04001199{
1200 int i;
1201 u32 val;
1202
1203 for (i = 0; i < timeout; i++) {
1204 val = ssb_read32(dev, reg);
1205 if (set) {
Michael Büsch8c68bd42011-02-15 00:21:50 +01001206 if ((val & bitmask) == bitmask)
Michael Buesch61e115a2007-09-18 15:12:50 -04001207 return 0;
1208 } else {
1209 if (!(val & bitmask))
1210 return 0;
1211 }
1212 udelay(10);
1213 }
1214 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1215 "register %04X to %s.\n",
1216 bitmask, reg, (set ? "set" : "clear"));
1217
1218 return -ETIMEDOUT;
1219}
1220
1221void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1222{
Rafał Miłeckib1a1bcf2011-02-17 01:50:50 +01001223 u32 reject, val;
Michael Buesch61e115a2007-09-18 15:12:50 -04001224
1225 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1226 return;
1227
1228 reject = ssb_tmslow_reject_bitmask(dev);
Rafał Miłeckib1a1bcf2011-02-17 01:50:50 +01001229
Rafał Miłecki011d1832011-02-17 01:50:51 +01001230 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1231 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1232 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1233 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
Rafał Miłeckib1a1bcf2011-02-17 01:50:50 +01001234
Rafał Miłecki011d1832011-02-17 01:50:51 +01001235 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1236 val = ssb_read32(dev, SSB_IMSTATE);
1237 val |= SSB_IMSTATE_REJECT;
1238 ssb_write32(dev, SSB_IMSTATE, val);
1239 ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1240 0);
1241 }
Michael Buesch61e115a2007-09-18 15:12:50 -04001242
Rafał Miłecki011d1832011-02-17 01:50:51 +01001243 ssb_write32(dev, SSB_TMSLOW,
1244 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1245 reject | SSB_TMSLOW_RESET |
1246 core_specific_flags);
1247 ssb_flush_tmslow(dev);
1248
1249 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1250 val = ssb_read32(dev, SSB_IMSTATE);
1251 val &= ~SSB_IMSTATE_REJECT;
1252 ssb_write32(dev, SSB_IMSTATE, val);
1253 }
Rafał Miłeckib1a1bcf2011-02-17 01:50:50 +01001254 }
1255
Michael Buesch61e115a2007-09-18 15:12:50 -04001256 ssb_write32(dev, SSB_TMSLOW,
1257 reject | SSB_TMSLOW_RESET |
1258 core_specific_flags);
1259 ssb_flush_tmslow(dev);
1260}
1261EXPORT_SYMBOL(ssb_device_disable);
1262
1263u32 ssb_dma_translation(struct ssb_device *dev)
1264{
1265 switch (dev->bus->bustype) {
1266 case SSB_BUSTYPE_SSB:
1267 return 0;
1268 case SSB_BUSTYPE_PCI:
Michael Buesch61e115a2007-09-18 15:12:50 -04001269 return SSB_PCI_DMA;
Michael Bueschf2257632008-06-20 11:50:29 +02001270 default:
1271 __ssb_dma_not_implemented(dev);
Michael Buesch61e115a2007-09-18 15:12:50 -04001272 }
1273 return 0;
1274}
1275EXPORT_SYMBOL(ssb_dma_translation);
1276
Michael Buesch61e115a2007-09-18 15:12:50 -04001277int ssb_bus_may_powerdown(struct ssb_bus *bus)
1278{
1279 struct ssb_chipcommon *cc;
1280 int err = 0;
1281
1282 /* On buses where more than one core may be working
1283 * at a time, we must not powerdown stuff if there are
1284 * still cores that may want to run. */
1285 if (bus->bustype == SSB_BUSTYPE_SSB)
1286 goto out;
1287
1288 cc = &bus->chipco;
Stefano Brivio881400a2008-04-06 17:05:07 +02001289
1290 if (!cc->dev)
1291 goto out;
1292 if (cc->dev->id.revision < 5)
1293 goto out;
1294
Michael Buesch61e115a2007-09-18 15:12:50 -04001295 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1296 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1297 if (err)
1298 goto error;
1299out:
1300#ifdef CONFIG_SSB_DEBUG
1301 bus->powered_up = 0;
1302#endif
1303 return err;
1304error:
1305 ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1306 goto out;
1307}
1308EXPORT_SYMBOL(ssb_bus_may_powerdown);
1309
1310int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1311{
Michael Buesch61e115a2007-09-18 15:12:50 -04001312 int err;
1313 enum ssb_clkmode mode;
1314
1315 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1316 if (err)
1317 goto error;
Michael Buesch61e115a2007-09-18 15:12:50 -04001318
1319#ifdef CONFIG_SSB_DEBUG
1320 bus->powered_up = 1;
1321#endif
Rafał Miłeckia6ef8142011-04-23 19:30:28 +02001322
1323 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1324 ssb_chipco_set_clockmode(&bus->chipco, mode);
1325
Michael Buesch61e115a2007-09-18 15:12:50 -04001326 return 0;
1327error:
1328 ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1329 return err;
1330}
1331EXPORT_SYMBOL(ssb_bus_powerup);
1332
Rafał Miłecki8576f812011-05-11 02:10:58 +02001333static void ssb_broadcast_value(struct ssb_device *dev,
1334 u32 address, u32 data)
1335{
John W. Linville11590242011-05-13 09:23:47 -04001336#ifdef CONFIG_SSB_DRIVER_PCICORE
Rafał Miłecki8576f812011-05-11 02:10:58 +02001337 /* This is used for both, PCI and ChipCommon core, so be careful. */
1338 BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1339 BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
John W. Linville11590242011-05-13 09:23:47 -04001340#endif
Rafał Miłecki8576f812011-05-11 02:10:58 +02001341
John W. Linville11590242011-05-13 09:23:47 -04001342 ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1343 ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1344 ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1345 ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
Rafał Miłecki8576f812011-05-11 02:10:58 +02001346}
1347
1348void ssb_commit_settings(struct ssb_bus *bus)
1349{
1350 struct ssb_device *dev;
1351
John W. Linville11590242011-05-13 09:23:47 -04001352#ifdef CONFIG_SSB_DRIVER_PCICORE
Rafał Miłecki8576f812011-05-11 02:10:58 +02001353 dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
John W. Linville11590242011-05-13 09:23:47 -04001354#else
1355 dev = bus->chipco.dev;
1356#endif
Rafał Miłecki8576f812011-05-11 02:10:58 +02001357 if (WARN_ON(!dev))
1358 return;
1359 /* This forces an update of the cached registers. */
1360 ssb_broadcast_value(dev, 0xFD8, 0);
1361}
1362EXPORT_SYMBOL(ssb_commit_settings);
1363
Michael Buesch61e115a2007-09-18 15:12:50 -04001364u32 ssb_admatch_base(u32 adm)
1365{
1366 u32 base = 0;
1367
1368 switch (adm & SSB_ADM_TYPE) {
1369 case SSB_ADM_TYPE0:
1370 base = (adm & SSB_ADM_BASE0);
1371 break;
1372 case SSB_ADM_TYPE1:
1373 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1374 base = (adm & SSB_ADM_BASE1);
1375 break;
1376 case SSB_ADM_TYPE2:
1377 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1378 base = (adm & SSB_ADM_BASE2);
1379 break;
1380 default:
1381 SSB_WARN_ON(1);
1382 }
1383
1384 return base;
1385}
1386EXPORT_SYMBOL(ssb_admatch_base);
1387
1388u32 ssb_admatch_size(u32 adm)
1389{
1390 u32 size = 0;
1391
1392 switch (adm & SSB_ADM_TYPE) {
1393 case SSB_ADM_TYPE0:
1394 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1395 break;
1396 case SSB_ADM_TYPE1:
1397 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1398 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1399 break;
1400 case SSB_ADM_TYPE2:
1401 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1402 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1403 break;
1404 default:
1405 SSB_WARN_ON(1);
1406 }
1407 size = (1 << (size + 1));
1408
1409 return size;
1410}
1411EXPORT_SYMBOL(ssb_admatch_size);
1412
1413static int __init ssb_modinit(void)
1414{
1415 int err;
1416
1417 /* See the comment at the ssb_is_early_boot definition */
1418 ssb_is_early_boot = 0;
1419 err = bus_register(&ssb_bustype);
1420 if (err)
1421 return err;
1422
1423 /* Maybe we already registered some buses at early boot.
1424 * Check for this and attach them
1425 */
1426 ssb_buses_lock();
1427 err = ssb_attach_queued_buses();
1428 ssb_buses_unlock();
Michael Buesche6c463e2009-09-05 11:18:47 +02001429 if (err) {
Michael Buesch61e115a2007-09-18 15:12:50 -04001430 bus_unregister(&ssb_bustype);
Michael Buesche6c463e2009-09-05 11:18:47 +02001431 goto out;
1432 }
Michael Buesch61e115a2007-09-18 15:12:50 -04001433
1434 err = b43_pci_ssb_bridge_init();
1435 if (err) {
1436 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
Michael Bueschaab547c2008-02-29 11:36:12 +01001437 "initialization failed\n");
1438 /* don't fail SSB init because of this */
1439 err = 0;
1440 }
1441 err = ssb_gige_init();
1442 if (err) {
1443 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1444 "driver initialization failed\n");
Michael Buesch61e115a2007-09-18 15:12:50 -04001445 /* don't fail SSB init because of this */
1446 err = 0;
1447 }
Michael Buesche6c463e2009-09-05 11:18:47 +02001448out:
Michael Buesch61e115a2007-09-18 15:12:50 -04001449 return err;
1450}
Michael Buesch8d8c90e2007-10-27 15:14:39 +02001451/* ssb must be initialized after PCI but before the ssb drivers.
1452 * That means we must use some initcall between subsys_initcall
1453 * and device_initcall. */
1454fs_initcall(ssb_modinit);
Michael Buesch61e115a2007-09-18 15:12:50 -04001455
1456static void __exit ssb_modexit(void)
1457{
Michael Bueschaab547c2008-02-29 11:36:12 +01001458 ssb_gige_exit();
Michael Buesch61e115a2007-09-18 15:12:50 -04001459 b43_pci_ssb_bridge_exit();
1460 bus_unregister(&ssb_bustype);
1461}
1462module_exit(ssb_modexit)