blob: 3b645b8a261fa3476bdc05446ec11bc6a4d8f3de [file] [log] [blame]
Michael Buesch61e115a2007-09-18 15:12:50 -04001/*
2 * Sonics Silicon Backplane
3 * Subsystem core
4 *
5 * Copyright 2005, Broadcom Corporation
Michael Büscheb032b92011-07-04 20:50:05 +02006 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
Michael Buesch61e115a2007-09-18 15:12:50 -04007 *
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>
Paul Gortmaker20a112d2011-07-17 16:03:40 -040015#include <linux/module.h>
Hauke Mehrtensbde327e2012-12-05 18:46:08 +010016#include <linux/platform_device.h>
Michael Buesch61e115a2007-09-18 15:12:50 -040017#include <linux/ssb/ssb.h>
18#include <linux/ssb/ssb_regs.h>
Michael Bueschaab547c2008-02-29 11:36:12 +010019#include <linux/ssb/ssb_driver_gige.h>
Michael Buesch61e115a2007-09-18 15:12:50 -040020#include <linux/dma-mapping.h>
21#include <linux/pci.h>
Albert Herranz24ea6022009-09-08 19:30:12 +020022#include <linux/mmc/sdio_func.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Michael Buesch61e115a2007-09-18 15:12:50 -040024
Michael Buesch61e115a2007-09-18 15:12:50 -040025#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
Michael Buesche7ec2e32008-03-10 17:26:32 +010074#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
Albert Herranz24ea6022009-09-08 19:30:12 +020093#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
Michael Bueschaab547c2008-02-29 11:36:12 +0100112int 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
Michael Buesch61e115a2007-09-18 15:12:50 -0400131static 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
Michael Buesch61e115a2007-09-18 15:12:50 -0400144static 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;
Michael Buesch61e115a2007-09-18 15:12:50 -0400148 int err = 0;
149
Michael Buesch61e115a2007-09-18 15:12:50 -0400150 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
Michael Buesch61e115a2007-09-18 15:12:50 -0400161static 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;
Michael Buesch61e115a2007-09-18 15:12:50 -0400165 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 }
Michael Buesch61e115a2007-09-18 15:12:50 -0400174out:
175 return err;
176}
177
Michael Buesch8fe2b652008-03-30 00:10:50 +0100178int 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}
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;
210}
211EXPORT_SYMBOL(ssb_bus_suspend);
212
Michael Bueschd72bb402008-04-02 17:03:26 +0200213#ifdef CONFIG_SSB_SPROM
Michael Buesch3ba60182009-11-23 20:12:13 +0100214/** 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)
Michael Buesch61e115a2007-09-18 15:12:50 -0400224{
Michael Buesch3ba60182009-11-23 20:12:13 +0100225 struct ssb_device *sdev;
226 struct ssb_driver *sdrv;
227 unsigned int i;
Michael Buesch61e115a2007-09-18 15:12:50 -0400228
Michael Buesch3ba60182009-11-23 20:12:13 +0100229 memset(ctx, 0, sizeof(*ctx));
230 ctx->bus = bus;
231 SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
232
Michael Buesch61e115a2007-09-18 15:12:50 -0400233 for (i = 0; i < bus->nr_devices; i++) {
Michael Buesch3ba60182009-11-23 20:12:13 +0100234 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);
Michael Buesch61e115a2007-09-18 15:12:50 -0400239 continue;
Michael Buesch61e115a2007-09-18 15:12:50 -0400240 }
Alan Sternf3ff9242012-01-24 13:35:24 -0500241 sdrv = drv_to_ssb_drv(sdev->dev->driver);
242 if (SSB_WARN_ON(!sdrv->remove))
Michael Buesch61e115a2007-09-18 15:12:50 -0400243 continue;
Michael Buesch3ba60182009-11-23 20:12:13 +0100244 sdrv->remove(sdev);
245 ctx->device_frozen[i] = 1;
Michael Buesch61e115a2007-09-18 15:12:50 -0400246 }
247
248 return 0;
Michael Buesch61e115a2007-09-18 15:12:50 -0400249}
250
Michael Buesch3ba60182009-11-23 20:12:13 +0100251/** 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)
Michael Buesch61e115a2007-09-18 15:12:50 -0400258{
Michael Buesch3ba60182009-11-23 20:12:13 +0100259 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;
Michael Buesch61e115a2007-09-18 15:12:50 -0400264
265 for (i = 0; i < bus->nr_devices; i++) {
Michael Buesch3ba60182009-11-23 20:12:13 +0100266 if (!ctx->device_frozen[i])
Michael Buesch61e115a2007-09-18 15:12:50 -0400267 continue;
Michael Buesch3ba60182009-11-23 20:12:13 +0100268 sdev = &bus->devices[i];
269
270 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
Michael Buesch61e115a2007-09-18 15:12:50 -0400271 continue;
Michael Buesch3ba60182009-11-23 20:12:13 +0100272 sdrv = drv_to_ssb_drv(sdev->dev->driver);
273 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
Michael Buesch61e115a2007-09-18 15:12:50 -0400274 continue;
Michael Buesch3ba60182009-11-23 20:12:13 +0100275
276 err = sdrv->probe(sdev, &sdev->id);
Michael Buesch61e115a2007-09-18 15:12:50 -0400277 if (err) {
278 ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
Michael Buesch3ba60182009-11-23 20:12:13 +0100279 dev_name(sdev->dev));
280 result = err;
Michael Buesch61e115a2007-09-18 15:12:50 -0400281 }
Michael Buesch3ba60182009-11-23 20:12:13 +0100282 ssb_device_put(sdev);
Michael Buesch61e115a2007-09-18 15:12:50 -0400283 }
284
Michael Buesch3ba60182009-11-23 20:12:13 +0100285 return result;
Michael Buesch61e115a2007-09-18 15:12:50 -0400286}
Michael Bueschd72bb402008-04-02 17:03:26 +0200287#endif /* CONFIG_SSB_SPROM */
Michael Buesch61e115a2007-09-18 15:12:50 -0400288
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
Al Viro7ac03262007-10-14 05:46:09 +0100359static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
Michael Buesch61e115a2007-09-18 15:12:50 -0400360{
361 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
Michael Buesch61e115a2007-09-18 15:12:50 -0400362
363 if (!dev)
364 return -ENODEV;
365
Al Viro7ac03262007-10-14 05:46:09 +0100366 return add_uevent_var(env,
Michael Buesch61e115a2007-09-18 15:12:50 -0400367 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
368 ssb_dev->id.vendor, ssb_dev->id.coreid,
369 ssb_dev->id.revision);
Michael Buesch61e115a2007-09-18 15:12:50 -0400370}
371
Hauke Mehrtensaa3bf282010-11-28 12:22:52 +0100372#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); \
377}
378
379ssb_config_attr(core_num, core_index, "%u\n")
380ssb_config_attr(coreid, id.coreid, "0x%04x\n")
381ssb_config_attr(vendor, id.vendor, "0x%04x\n")
382ssb_config_attr(revision, id.revision, "%u\n")
383ssb_config_attr(irq, irq, "%u\n")
384static ssize_t
385name_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
391static 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
Michael Buesch61e115a2007-09-18 15:12:50 -0400401static 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,
Hauke Mehrtensaa3bf282010-11-28 12:22:52 +0100410 .dev_attrs = ssb_device_attrs,
Michael Buesch61e115a2007-09-18 15:12:50 -0400411};
412
413static 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
420static 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
427static 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 }
Hauke Mehrtensbde327e2012-12-05 18:46:08 +0100437
438#ifdef CONFIG_SSB_EMBEDDED
439 if (bus->bustype == SSB_BUSTYPE_SSB)
440 platform_device_unregister(bus->watchdog);
441#endif
Michael Buesch61e115a2007-09-18 15:12:50 -0400442}
443
444void ssb_bus_unregister(struct ssb_bus *bus)
445{
Hauke Mehrtens600485e2013-02-03 23:25:34 +0100446 int err;
447
448 err = ssb_gpio_unregister(bus);
449 if (err == -EBUSY)
450 ssb_dprintk(KERN_ERR PFX "Some GPIOs are still in use.\n");
451 else if (err)
452 ssb_dprintk(KERN_ERR PFX
453 "Can not unregister GPIO driver: %i\n", err);
454
Michael Buesch61e115a2007-09-18 15:12:50 -0400455 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
Rafał Miłeckic7a4a9e2013-01-25 11:36:26 +0100552#ifdef CONFIG_SSB_DRIVER_MIPS
553 if (bus->mipscore.pflash.present) {
554 err = platform_device_register(&ssb_pflash_dev);
555 if (err)
556 pr_err("Error registering parallel flash\n");
557 }
558#endif
559
Michael Buesch61e115a2007-09-18 15:12:50 -0400560 return 0;
561error:
562 /* Unwind the already registered devices. */
563 ssb_devices_unregister(bus);
564 return err;
565}
566
567/* Needs ssb_buses_lock() */
Greg Kroah-Hartman163247c2012-12-21 15:10:52 -0800568static int ssb_attach_queued_buses(void)
Michael Buesch61e115a2007-09-18 15:12:50 -0400569{
570 struct ssb_bus *bus, *n;
571 int err = 0;
572 int drop_them_all = 0;
573
574 list_for_each_entry_safe(bus, n, &attach_queue, list) {
575 if (drop_them_all) {
576 list_del(&bus->list);
577 continue;
578 }
579 /* Can't init the PCIcore in ssb_bus_register(), as that
580 * is too early in boot for embedded systems
581 * (no udelay() available). So do it here in attach stage.
582 */
583 err = ssb_bus_powerup(bus, 0);
584 if (err)
585 goto error;
586 ssb_pcicore_init(&bus->pcicore);
Hauke Mehrtensbde327e2012-12-05 18:46:08 +0100587 if (bus->bustype == SSB_BUSTYPE_SSB)
588 ssb_watchdog_register(bus);
Michael Buesch61e115a2007-09-18 15:12:50 -0400589 ssb_bus_may_powerdown(bus);
590
591 err = ssb_devices_register(bus);
592error:
593 if (err) {
594 drop_them_all = 1;
595 list_del(&bus->list);
596 continue;
597 }
598 list_move_tail(&bus->list, &buses);
599 }
600
601 return err;
602}
603
Michael Bueschffc76892008-02-20 19:08:10 +0100604static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
605{
606 struct ssb_bus *bus = dev->bus;
607
608 offset += dev->core_index * SSB_CORE_SIZE;
609 return readb(bus->mmio + offset);
610}
611
Michael Buesch61e115a2007-09-18 15:12:50 -0400612static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
613{
614 struct ssb_bus *bus = dev->bus;
615
616 offset += dev->core_index * SSB_CORE_SIZE;
617 return readw(bus->mmio + offset);
618}
619
620static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
621{
622 struct ssb_bus *bus = dev->bus;
623
624 offset += dev->core_index * SSB_CORE_SIZE;
625 return readl(bus->mmio + offset);
626}
627
Michael Bueschd625a292008-04-02 19:46:56 +0200628#ifdef CONFIG_SSB_BLOCKIO
629static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
630 size_t count, u16 offset, u8 reg_width)
631{
632 struct ssb_bus *bus = dev->bus;
633 void __iomem *addr;
634
635 offset += dev->core_index * SSB_CORE_SIZE;
636 addr = bus->mmio + offset;
637
638 switch (reg_width) {
639 case sizeof(u8): {
640 u8 *buf = buffer;
641
642 while (count) {
643 *buf = __raw_readb(addr);
644 buf++;
645 count--;
646 }
647 break;
648 }
649 case sizeof(u16): {
650 __le16 *buf = buffer;
651
652 SSB_WARN_ON(count & 1);
653 while (count) {
654 *buf = (__force __le16)__raw_readw(addr);
655 buf++;
656 count -= 2;
657 }
658 break;
659 }
660 case sizeof(u32): {
661 __le32 *buf = buffer;
662
663 SSB_WARN_ON(count & 3);
664 while (count) {
665 *buf = (__force __le32)__raw_readl(addr);
666 buf++;
667 count -= 4;
668 }
669 break;
670 }
671 default:
672 SSB_WARN_ON(1);
673 }
674}
675#endif /* CONFIG_SSB_BLOCKIO */
676
Michael Bueschffc76892008-02-20 19:08:10 +0100677static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
678{
679 struct ssb_bus *bus = dev->bus;
680
681 offset += dev->core_index * SSB_CORE_SIZE;
682 writeb(value, bus->mmio + offset);
683}
684
Michael Buesch61e115a2007-09-18 15:12:50 -0400685static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
686{
687 struct ssb_bus *bus = dev->bus;
688
689 offset += dev->core_index * SSB_CORE_SIZE;
690 writew(value, bus->mmio + offset);
691}
692
693static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
694{
695 struct ssb_bus *bus = dev->bus;
696
697 offset += dev->core_index * SSB_CORE_SIZE;
698 writel(value, bus->mmio + offset);
699}
700
Michael Bueschd625a292008-04-02 19:46:56 +0200701#ifdef CONFIG_SSB_BLOCKIO
702static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
703 size_t count, u16 offset, u8 reg_width)
704{
705 struct ssb_bus *bus = dev->bus;
706 void __iomem *addr;
707
708 offset += dev->core_index * SSB_CORE_SIZE;
709 addr = bus->mmio + offset;
710
711 switch (reg_width) {
712 case sizeof(u8): {
713 const u8 *buf = buffer;
714
715 while (count) {
716 __raw_writeb(*buf, addr);
717 buf++;
718 count--;
719 }
720 break;
721 }
722 case sizeof(u16): {
723 const __le16 *buf = buffer;
724
725 SSB_WARN_ON(count & 1);
726 while (count) {
727 __raw_writew((__force u16)(*buf), addr);
728 buf++;
729 count -= 2;
730 }
731 break;
732 }
733 case sizeof(u32): {
734 const __le32 *buf = buffer;
735
736 SSB_WARN_ON(count & 3);
737 while (count) {
738 __raw_writel((__force u32)(*buf), addr);
739 buf++;
740 count -= 4;
741 }
742 break;
743 }
744 default:
745 SSB_WARN_ON(1);
746 }
747}
748#endif /* CONFIG_SSB_BLOCKIO */
749
Michael Buesch61e115a2007-09-18 15:12:50 -0400750/* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
751static const struct ssb_bus_ops ssb_ssb_ops = {
Michael Bueschffc76892008-02-20 19:08:10 +0100752 .read8 = ssb_ssb_read8,
Michael Buesch61e115a2007-09-18 15:12:50 -0400753 .read16 = ssb_ssb_read16,
754 .read32 = ssb_ssb_read32,
Michael Bueschffc76892008-02-20 19:08:10 +0100755 .write8 = ssb_ssb_write8,
Michael Buesch61e115a2007-09-18 15:12:50 -0400756 .write16 = ssb_ssb_write16,
757 .write32 = ssb_ssb_write32,
Michael Bueschd625a292008-04-02 19:46:56 +0200758#ifdef CONFIG_SSB_BLOCKIO
759 .block_read = ssb_ssb_block_read,
760 .block_write = ssb_ssb_block_write,
761#endif
Michael Buesch61e115a2007-09-18 15:12:50 -0400762};
763
764static int ssb_fetch_invariants(struct ssb_bus *bus,
765 ssb_invariants_func_t get_invariants)
766{
767 struct ssb_init_invariants iv;
768 int err;
769
770 memset(&iv, 0, sizeof(iv));
771 err = get_invariants(bus, &iv);
772 if (err)
773 goto out;
774 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
775 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
Michael Buesch7cb44612008-02-19 17:46:48 +0100776 bus->has_cardbus_slot = iv.has_cardbus_slot;
Michael Buesch61e115a2007-09-18 15:12:50 -0400777out:
778 return err;
779}
780
Greg Kroah-Hartman163247c2012-12-21 15:10:52 -0800781static int ssb_bus_register(struct ssb_bus *bus,
782 ssb_invariants_func_t get_invariants,
783 unsigned long baseaddr)
Michael Buesch61e115a2007-09-18 15:12:50 -0400784{
785 int err;
786
787 spin_lock_init(&bus->bar_lock);
788 INIT_LIST_HEAD(&bus->list);
Michael Buesch53521d82008-02-19 16:22:50 +0100789#ifdef CONFIG_SSB_EMBEDDED
790 spin_lock_init(&bus->gpio_lock);
791#endif
Michael Buesch61e115a2007-09-18 15:12:50 -0400792
793 /* Powerup the bus */
794 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
795 if (err)
796 goto out;
Albert Herranz24ea6022009-09-08 19:30:12 +0200797
798 /* Init SDIO-host device (if any), before the scan */
799 err = ssb_sdio_init(bus);
800 if (err)
801 goto err_disable_xtal;
802
Michael Buesch61e115a2007-09-18 15:12:50 -0400803 ssb_buses_lock();
804 bus->busnumber = next_busnumber;
805 /* Scan for devices (cores) */
806 err = ssb_bus_scan(bus, baseaddr);
807 if (err)
Albert Herranz24ea6022009-09-08 19:30:12 +0200808 goto err_sdio_exit;
Michael Buesch61e115a2007-09-18 15:12:50 -0400809
810 /* Init PCI-host device (if any) */
811 err = ssb_pci_init(bus);
812 if (err)
813 goto err_unmap;
814 /* Init PCMCIA-host device (if any) */
815 err = ssb_pcmcia_init(bus);
816 if (err)
817 goto err_pci_exit;
818
819 /* Initialize basic system devices (if available) */
820 err = ssb_bus_powerup(bus, 0);
821 if (err)
822 goto err_pcmcia_exit;
823 ssb_chipcommon_init(&bus->chipco);
Hauke Mehrtens394bc7e2012-11-20 22:24:32 +0000824 ssb_extif_init(&bus->extif);
Michael Buesch61e115a2007-09-18 15:12:50 -0400825 ssb_mipscore_init(&bus->mipscore);
Hauke Mehrtensec43b082012-11-20 22:24:33 +0000826 err = ssb_gpio_init(bus);
827 if (err == -ENOTSUPP)
828 ssb_dprintk(KERN_DEBUG PFX "GPIO driver not activated\n");
829 else if (err)
830 ssb_dprintk(KERN_ERR PFX
831 "Error registering GPIO driver: %i\n", err);
Michael Buesch61e115a2007-09-18 15:12:50 -0400832 err = ssb_fetch_invariants(bus, get_invariants);
833 if (err) {
834 ssb_bus_may_powerdown(bus);
835 goto err_pcmcia_exit;
836 }
837 ssb_bus_may_powerdown(bus);
838
839 /* Queue it for attach.
840 * See the comment at the ssb_is_early_boot definition. */
841 list_add_tail(&bus->list, &attach_queue);
842 if (!ssb_is_early_boot) {
843 /* This is not early boot, so we must attach the bus now */
844 err = ssb_attach_queued_buses();
845 if (err)
846 goto err_dequeue;
847 }
848 next_busnumber++;
849 ssb_buses_unlock();
850
851out:
852 return err;
853
854err_dequeue:
855 list_del(&bus->list);
856err_pcmcia_exit:
Michael Buesche7ec2e32008-03-10 17:26:32 +0100857 ssb_pcmcia_exit(bus);
Michael Buesch61e115a2007-09-18 15:12:50 -0400858err_pci_exit:
859 ssb_pci_exit(bus);
860err_unmap:
861 ssb_iounmap(bus);
Albert Herranz24ea6022009-09-08 19:30:12 +0200862err_sdio_exit:
863 ssb_sdio_exit(bus);
Michael Buesch61e115a2007-09-18 15:12:50 -0400864err_disable_xtal:
865 ssb_buses_unlock();
866 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
867 return err;
868}
869
870#ifdef CONFIG_SSB_PCIHOST
Greg Kroah-Hartman163247c2012-12-21 15:10:52 -0800871int ssb_bus_pcibus_register(struct ssb_bus *bus, struct pci_dev *host_pci)
Michael Buesch61e115a2007-09-18 15:12:50 -0400872{
873 int err;
874
875 bus->bustype = SSB_BUSTYPE_PCI;
876 bus->host_pci = host_pci;
877 bus->ops = &ssb_pci_ops;
878
879 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
880 if (!err) {
881 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
Kay Sieversb7b05fe2008-10-30 15:51:57 +0100882 "PCI device %s\n", dev_name(&host_pci->dev));
Larry Fingerce9626e2010-04-23 13:17:21 -0500883 } else {
884 ssb_printk(KERN_ERR PFX "Failed to register PCI version"
885 " of SSB with error %d\n", err);
Michael Buesch61e115a2007-09-18 15:12:50 -0400886 }
887
888 return err;
889}
890EXPORT_SYMBOL(ssb_bus_pcibus_register);
891#endif /* CONFIG_SSB_PCIHOST */
892
893#ifdef CONFIG_SSB_PCMCIAHOST
Greg Kroah-Hartman163247c2012-12-21 15:10:52 -0800894int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
895 struct pcmcia_device *pcmcia_dev,
896 unsigned long baseaddr)
Michael Buesch61e115a2007-09-18 15:12:50 -0400897{
898 int err;
899
900 bus->bustype = SSB_BUSTYPE_PCMCIA;
901 bus->host_pcmcia = pcmcia_dev;
902 bus->ops = &ssb_pcmcia_ops;
903
904 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
905 if (!err) {
906 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
907 "PCMCIA device %s\n", pcmcia_dev->devname);
908 }
909
910 return err;
911}
912EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
913#endif /* CONFIG_SSB_PCMCIAHOST */
914
Albert Herranz24ea6022009-09-08 19:30:12 +0200915#ifdef CONFIG_SSB_SDIOHOST
Greg Kroah-Hartman163247c2012-12-21 15:10:52 -0800916int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
917 unsigned int quirks)
Albert Herranz24ea6022009-09-08 19:30:12 +0200918{
919 int err;
920
921 bus->bustype = SSB_BUSTYPE_SDIO;
922 bus->host_sdio = func;
923 bus->ops = &ssb_sdio_ops;
924 bus->quirks = quirks;
925
926 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
927 if (!err) {
928 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
929 "SDIO device %s\n", sdio_func_id(func));
930 }
931
932 return err;
933}
934EXPORT_SYMBOL(ssb_bus_sdiobus_register);
935#endif /* CONFIG_SSB_PCMCIAHOST */
936
Greg Kroah-Hartman163247c2012-12-21 15:10:52 -0800937int ssb_bus_ssbbus_register(struct ssb_bus *bus, unsigned long baseaddr,
938 ssb_invariants_func_t get_invariants)
Michael Buesch61e115a2007-09-18 15:12:50 -0400939{
940 int err;
941
942 bus->bustype = SSB_BUSTYPE_SSB;
943 bus->ops = &ssb_ssb_ops;
944
945 err = ssb_bus_register(bus, get_invariants, baseaddr);
946 if (!err) {
947 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
948 "address 0x%08lX\n", baseaddr);
949 }
950
951 return err;
952}
953
954int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
955{
956 drv->drv.name = drv->name;
957 drv->drv.bus = &ssb_bustype;
958 drv->drv.owner = owner;
959
960 return driver_register(&drv->drv);
961}
962EXPORT_SYMBOL(__ssb_driver_register);
963
964void ssb_driver_unregister(struct ssb_driver *drv)
965{
966 driver_unregister(&drv->drv);
967}
968EXPORT_SYMBOL(ssb_driver_unregister);
969
970void ssb_set_devtypedata(struct ssb_device *dev, void *data)
971{
972 struct ssb_bus *bus = dev->bus;
973 struct ssb_device *ent;
974 int i;
975
976 for (i = 0; i < bus->nr_devices; i++) {
977 ent = &(bus->devices[i]);
978 if (ent->id.vendor != dev->id.vendor)
979 continue;
980 if (ent->id.coreid != dev->id.coreid)
981 continue;
982
983 ent->devtypedata = data;
984 }
985}
986EXPORT_SYMBOL(ssb_set_devtypedata);
987
988static u32 clkfactor_f6_resolve(u32 v)
989{
990 /* map the magic values */
991 switch (v) {
992 case SSB_CHIPCO_CLK_F6_2:
993 return 2;
994 case SSB_CHIPCO_CLK_F6_3:
995 return 3;
996 case SSB_CHIPCO_CLK_F6_4:
997 return 4;
998 case SSB_CHIPCO_CLK_F6_5:
999 return 5;
1000 case SSB_CHIPCO_CLK_F6_6:
1001 return 6;
1002 case SSB_CHIPCO_CLK_F6_7:
1003 return 7;
1004 }
1005 return 0;
1006}
1007
1008/* Calculate the speed the backplane would run at a given set of clockcontrol values */
1009u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
1010{
1011 u32 n1, n2, clock, m1, m2, m3, mc;
1012
1013 n1 = (n & SSB_CHIPCO_CLK_N1);
1014 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
1015
1016 switch (plltype) {
1017 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
1018 if (m & SSB_CHIPCO_CLK_T6_MMASK)
Hauke Mehrtense913d462011-06-21 20:53:20 +02001019 return SSB_CHIPCO_CLK_T6_M1;
1020 return SSB_CHIPCO_CLK_T6_M0;
Michael Buesch61e115a2007-09-18 15:12:50 -04001021 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1022 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1023 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1024 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1025 n1 = clkfactor_f6_resolve(n1);
1026 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1027 break;
1028 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1029 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1030 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1031 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1032 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1033 break;
1034 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1035 return 100000000;
1036 default:
1037 SSB_WARN_ON(1);
1038 }
1039
1040 switch (plltype) {
1041 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1042 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1043 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1044 break;
1045 default:
1046 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1047 }
1048 if (!clock)
1049 return 0;
1050
1051 m1 = (m & SSB_CHIPCO_CLK_M1);
1052 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1053 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1054 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1055
1056 switch (plltype) {
1057 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1058 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1059 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1060 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1061 m1 = clkfactor_f6_resolve(m1);
1062 if ((plltype == SSB_PLLTYPE_1) ||
1063 (plltype == SSB_PLLTYPE_3))
1064 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1065 else
1066 m2 = clkfactor_f6_resolve(m2);
1067 m3 = clkfactor_f6_resolve(m3);
1068
1069 switch (mc) {
1070 case SSB_CHIPCO_CLK_MC_BYPASS:
1071 return clock;
1072 case SSB_CHIPCO_CLK_MC_M1:
1073 return (clock / m1);
1074 case SSB_CHIPCO_CLK_MC_M1M2:
1075 return (clock / (m1 * m2));
1076 case SSB_CHIPCO_CLK_MC_M1M2M3:
1077 return (clock / (m1 * m2 * m3));
1078 case SSB_CHIPCO_CLK_MC_M1M3:
1079 return (clock / (m1 * m3));
1080 }
1081 return 0;
1082 case SSB_PLLTYPE_2:
1083 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1084 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1085 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1086 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1087 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1088 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1089
1090 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1091 clock /= m1;
1092 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1093 clock /= m2;
1094 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1095 clock /= m3;
1096 return clock;
1097 default:
1098 SSB_WARN_ON(1);
1099 }
1100 return 0;
1101}
1102
1103/* Get the current speed the backplane is running at */
1104u32 ssb_clockspeed(struct ssb_bus *bus)
1105{
1106 u32 rate;
1107 u32 plltype;
1108 u32 clkctl_n, clkctl_m;
1109
Hauke Mehrtensd486a5b2012-02-01 00:13:56 +01001110 if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
1111 return ssb_pmu_get_controlclock(&bus->chipco);
1112
Michael Buesch61e115a2007-09-18 15:12:50 -04001113 if (ssb_extif_available(&bus->extif))
1114 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1115 &clkctl_n, &clkctl_m);
1116 else if (bus->chipco.dev)
1117 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1118 &clkctl_n, &clkctl_m);
1119 else
1120 return 0;
1121
1122 if (bus->chip_id == 0x5365) {
1123 rate = 100000000;
1124 } else {
1125 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1126 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1127 rate /= 2;
1128 }
1129
1130 return rate;
1131}
1132EXPORT_SYMBOL(ssb_clockspeed);
1133
1134static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1135{
Larry Fingerc272ef42007-11-09 16:56:25 -06001136 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1137
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001138 /* The REJECT bit seems to be different for Backplane rev 2.3 */
Larry Fingerc272ef42007-11-09 16:56:25 -06001139 switch (rev) {
Michael Buesch61e115a2007-09-18 15:12:50 -04001140 case SSB_IDLOW_SSBREV_22:
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001141 case SSB_IDLOW_SSBREV_24:
1142 case SSB_IDLOW_SSBREV_26:
1143 return SSB_TMSLOW_REJECT;
Michael Buesch61e115a2007-09-18 15:12:50 -04001144 case SSB_IDLOW_SSBREV_23:
1145 return SSB_TMSLOW_REJECT_23;
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001146 case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */
Larry Fingerc272ef42007-11-09 16:56:25 -06001147 case SSB_IDLOW_SSBREV_27: /* same here */
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001148 return SSB_TMSLOW_REJECT; /* this is a guess */
Michael Buesch61e115a2007-09-18 15:12:50 -04001149 default:
Cong Ding6cdd6402012-12-08 23:11:06 +00001150 WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
Michael Buesch61e115a2007-09-18 15:12:50 -04001151 }
Rafał Miłecki04ad1fb2011-04-23 19:30:29 +02001152 return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
Michael Buesch61e115a2007-09-18 15:12:50 -04001153}
1154
1155int ssb_device_is_enabled(struct ssb_device *dev)
1156{
1157 u32 val;
1158 u32 reject;
1159
1160 reject = ssb_tmslow_reject_bitmask(dev);
1161 val = ssb_read32(dev, SSB_TMSLOW);
1162 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1163
1164 return (val == SSB_TMSLOW_CLOCK);
1165}
1166EXPORT_SYMBOL(ssb_device_is_enabled);
1167
1168static void ssb_flush_tmslow(struct ssb_device *dev)
1169{
1170 /* Make _really_ sure the device has finished the TMSLOW
1171 * register write transaction, as we risk running into
1172 * a machine check exception otherwise.
1173 * Do this by reading the register back to commit the
1174 * PCI write and delay an additional usec for the device
1175 * to react to the change. */
1176 ssb_read32(dev, SSB_TMSLOW);
1177 udelay(1);
1178}
1179
1180void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1181{
1182 u32 val;
1183
1184 ssb_device_disable(dev, core_specific_flags);
1185 ssb_write32(dev, SSB_TMSLOW,
1186 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1187 SSB_TMSLOW_FGC | core_specific_flags);
1188 ssb_flush_tmslow(dev);
1189
1190 /* Clear SERR if set. This is a hw bug workaround. */
1191 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1192 ssb_write32(dev, SSB_TMSHIGH, 0);
1193
1194 val = ssb_read32(dev, SSB_IMSTATE);
1195 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1196 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1197 ssb_write32(dev, SSB_IMSTATE, val);
1198 }
1199
1200 ssb_write32(dev, SSB_TMSLOW,
1201 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1202 core_specific_flags);
1203 ssb_flush_tmslow(dev);
1204
1205 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1206 core_specific_flags);
1207 ssb_flush_tmslow(dev);
1208}
1209EXPORT_SYMBOL(ssb_device_enable);
1210
Michael Büsch8c68bd42011-02-15 00:21:50 +01001211/* Wait for bitmask in a register to get set or cleared.
Michael Buesch61e115a2007-09-18 15:12:50 -04001212 * timeout is in units of ten-microseconds */
Michael Büsch8c68bd42011-02-15 00:21:50 +01001213static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1214 int timeout, int set)
Michael Buesch61e115a2007-09-18 15:12:50 -04001215{
1216 int i;
1217 u32 val;
1218
1219 for (i = 0; i < timeout; i++) {
1220 val = ssb_read32(dev, reg);
1221 if (set) {
Michael Büsch8c68bd42011-02-15 00:21:50 +01001222 if ((val & bitmask) == bitmask)
Michael Buesch61e115a2007-09-18 15:12:50 -04001223 return 0;
1224 } else {
1225 if (!(val & bitmask))
1226 return 0;
1227 }
1228 udelay(10);
1229 }
1230 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1231 "register %04X to %s.\n",
1232 bitmask, reg, (set ? "set" : "clear"));
1233
1234 return -ETIMEDOUT;
1235}
1236
1237void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1238{
Rafał Miłeckib1a1bcf2011-02-17 01:50:50 +01001239 u32 reject, val;
Michael Buesch61e115a2007-09-18 15:12:50 -04001240
1241 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1242 return;
1243
1244 reject = ssb_tmslow_reject_bitmask(dev);
Rafał Miłeckib1a1bcf2011-02-17 01:50:50 +01001245
Rafał Miłecki011d1832011-02-17 01:50:51 +01001246 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1247 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1248 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1249 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
Rafał Miłeckib1a1bcf2011-02-17 01:50:50 +01001250
Rafał Miłecki011d1832011-02-17 01:50:51 +01001251 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1252 val = ssb_read32(dev, SSB_IMSTATE);
1253 val |= SSB_IMSTATE_REJECT;
1254 ssb_write32(dev, SSB_IMSTATE, val);
1255 ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1256 0);
1257 }
Michael Buesch61e115a2007-09-18 15:12:50 -04001258
Rafał Miłecki011d1832011-02-17 01:50:51 +01001259 ssb_write32(dev, SSB_TMSLOW,
1260 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1261 reject | SSB_TMSLOW_RESET |
1262 core_specific_flags);
1263 ssb_flush_tmslow(dev);
1264
1265 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1266 val = ssb_read32(dev, SSB_IMSTATE);
1267 val &= ~SSB_IMSTATE_REJECT;
1268 ssb_write32(dev, SSB_IMSTATE, val);
1269 }
Rafał Miłeckib1a1bcf2011-02-17 01:50:50 +01001270 }
1271
Michael Buesch61e115a2007-09-18 15:12:50 -04001272 ssb_write32(dev, SSB_TMSLOW,
1273 reject | SSB_TMSLOW_RESET |
1274 core_specific_flags);
1275 ssb_flush_tmslow(dev);
1276}
1277EXPORT_SYMBOL(ssb_device_disable);
1278
Rafał Miłecki04023af2011-08-14 19:39:40 +02001279/* Some chipsets need routing known for PCIe and 64-bit DMA */
1280static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1281{
1282 u16 chip_id = dev->bus->chip_id;
1283
1284 if (dev->id.coreid == SSB_DEV_80211) {
1285 return (chip_id == 0x4322 || chip_id == 43221 ||
1286 chip_id == 43231 || chip_id == 43222);
1287 }
1288
1289 return 0;
1290}
1291
Michael Buesch61e115a2007-09-18 15:12:50 -04001292u32 ssb_dma_translation(struct ssb_device *dev)
1293{
1294 switch (dev->bus->bustype) {
1295 case SSB_BUSTYPE_SSB:
1296 return 0;
1297 case SSB_BUSTYPE_PCI:
Rafał Miłecki04023af2011-08-14 19:39:40 +02001298 if (pci_is_pcie(dev->bus->host_pci) &&
1299 ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
Rafał Miłeckia9770a82011-07-20 19:52:14 +02001300 return SSB_PCIE_DMA_H32;
Rafał Miłecki04023af2011-08-14 19:39:40 +02001301 } else {
1302 if (ssb_dma_translation_special_bit(dev))
1303 return SSB_PCIE_DMA_H32;
1304 else
1305 return SSB_PCI_DMA;
1306 }
Michael Bueschf2257632008-06-20 11:50:29 +02001307 default:
1308 __ssb_dma_not_implemented(dev);
Michael Buesch61e115a2007-09-18 15:12:50 -04001309 }
1310 return 0;
1311}
1312EXPORT_SYMBOL(ssb_dma_translation);
1313
Michael Buesch61e115a2007-09-18 15:12:50 -04001314int ssb_bus_may_powerdown(struct ssb_bus *bus)
1315{
1316 struct ssb_chipcommon *cc;
1317 int err = 0;
1318
1319 /* On buses where more than one core may be working
1320 * at a time, we must not powerdown stuff if there are
1321 * still cores that may want to run. */
1322 if (bus->bustype == SSB_BUSTYPE_SSB)
1323 goto out;
1324
1325 cc = &bus->chipco;
Stefano Brivio881400a2008-04-06 17:05:07 +02001326
1327 if (!cc->dev)
1328 goto out;
1329 if (cc->dev->id.revision < 5)
1330 goto out;
1331
Michael Buesch61e115a2007-09-18 15:12:50 -04001332 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1333 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1334 if (err)
1335 goto error;
1336out:
1337#ifdef CONFIG_SSB_DEBUG
1338 bus->powered_up = 0;
1339#endif
1340 return err;
1341error:
1342 ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1343 goto out;
1344}
1345EXPORT_SYMBOL(ssb_bus_may_powerdown);
1346
1347int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1348{
Michael Buesch61e115a2007-09-18 15:12:50 -04001349 int err;
1350 enum ssb_clkmode mode;
1351
1352 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1353 if (err)
1354 goto error;
Michael Buesch61e115a2007-09-18 15:12:50 -04001355
1356#ifdef CONFIG_SSB_DEBUG
1357 bus->powered_up = 1;
1358#endif
Rafał Miłeckia6ef8142011-04-23 19:30:28 +02001359
1360 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1361 ssb_chipco_set_clockmode(&bus->chipco, mode);
1362
Michael Buesch61e115a2007-09-18 15:12:50 -04001363 return 0;
1364error:
1365 ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1366 return err;
1367}
1368EXPORT_SYMBOL(ssb_bus_powerup);
1369
Rafał Miłecki8576f812011-05-11 02:10:58 +02001370static void ssb_broadcast_value(struct ssb_device *dev,
1371 u32 address, u32 data)
1372{
John W. Linville11590242011-05-13 09:23:47 -04001373#ifdef CONFIG_SSB_DRIVER_PCICORE
Rafał Miłecki8576f812011-05-11 02:10:58 +02001374 /* This is used for both, PCI and ChipCommon core, so be careful. */
1375 BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1376 BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
John W. Linville11590242011-05-13 09:23:47 -04001377#endif
Rafał Miłecki8576f812011-05-11 02:10:58 +02001378
John W. Linville11590242011-05-13 09:23:47 -04001379 ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1380 ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1381 ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1382 ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
Rafał Miłecki8576f812011-05-11 02:10:58 +02001383}
1384
1385void ssb_commit_settings(struct ssb_bus *bus)
1386{
1387 struct ssb_device *dev;
1388
John W. Linville11590242011-05-13 09:23:47 -04001389#ifdef CONFIG_SSB_DRIVER_PCICORE
Rafał Miłecki8576f812011-05-11 02:10:58 +02001390 dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
John W. Linville11590242011-05-13 09:23:47 -04001391#else
1392 dev = bus->chipco.dev;
1393#endif
Rafał Miłecki8576f812011-05-11 02:10:58 +02001394 if (WARN_ON(!dev))
1395 return;
1396 /* This forces an update of the cached registers. */
1397 ssb_broadcast_value(dev, 0xFD8, 0);
1398}
1399EXPORT_SYMBOL(ssb_commit_settings);
1400
Michael Buesch61e115a2007-09-18 15:12:50 -04001401u32 ssb_admatch_base(u32 adm)
1402{
1403 u32 base = 0;
1404
1405 switch (adm & SSB_ADM_TYPE) {
1406 case SSB_ADM_TYPE0:
1407 base = (adm & SSB_ADM_BASE0);
1408 break;
1409 case SSB_ADM_TYPE1:
1410 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1411 base = (adm & SSB_ADM_BASE1);
1412 break;
1413 case SSB_ADM_TYPE2:
1414 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1415 base = (adm & SSB_ADM_BASE2);
1416 break;
1417 default:
1418 SSB_WARN_ON(1);
1419 }
1420
1421 return base;
1422}
1423EXPORT_SYMBOL(ssb_admatch_base);
1424
1425u32 ssb_admatch_size(u32 adm)
1426{
1427 u32 size = 0;
1428
1429 switch (adm & SSB_ADM_TYPE) {
1430 case SSB_ADM_TYPE0:
1431 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1432 break;
1433 case SSB_ADM_TYPE1:
1434 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1435 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1436 break;
1437 case SSB_ADM_TYPE2:
1438 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1439 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1440 break;
1441 default:
1442 SSB_WARN_ON(1);
1443 }
1444 size = (1 << (size + 1));
1445
1446 return size;
1447}
1448EXPORT_SYMBOL(ssb_admatch_size);
1449
1450static int __init ssb_modinit(void)
1451{
1452 int err;
1453
1454 /* See the comment at the ssb_is_early_boot definition */
1455 ssb_is_early_boot = 0;
1456 err = bus_register(&ssb_bustype);
1457 if (err)
1458 return err;
1459
1460 /* Maybe we already registered some buses at early boot.
1461 * Check for this and attach them
1462 */
1463 ssb_buses_lock();
1464 err = ssb_attach_queued_buses();
1465 ssb_buses_unlock();
Michael Buesche6c463e2009-09-05 11:18:47 +02001466 if (err) {
Michael Buesch61e115a2007-09-18 15:12:50 -04001467 bus_unregister(&ssb_bustype);
Michael Buesche6c463e2009-09-05 11:18:47 +02001468 goto out;
1469 }
Michael Buesch61e115a2007-09-18 15:12:50 -04001470
1471 err = b43_pci_ssb_bridge_init();
1472 if (err) {
1473 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
Michael Bueschaab547c2008-02-29 11:36:12 +01001474 "initialization failed\n");
1475 /* don't fail SSB init because of this */
1476 err = 0;
1477 }
1478 err = ssb_gige_init();
1479 if (err) {
1480 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1481 "driver initialization failed\n");
Michael Buesch61e115a2007-09-18 15:12:50 -04001482 /* don't fail SSB init because of this */
1483 err = 0;
1484 }
Michael Buesche6c463e2009-09-05 11:18:47 +02001485out:
Michael Buesch61e115a2007-09-18 15:12:50 -04001486 return err;
1487}
Michael Buesch8d8c90e2007-10-27 15:14:39 +02001488/* ssb must be initialized after PCI but before the ssb drivers.
1489 * That means we must use some initcall between subsys_initcall
1490 * and device_initcall. */
1491fs_initcall(ssb_modinit);
Michael Buesch61e115a2007-09-18 15:12:50 -04001492
1493static void __exit ssb_modexit(void)
1494{
Michael Bueschaab547c2008-02-29 11:36:12 +01001495 ssb_gige_exit();
Michael Buesch61e115a2007-09-18 15:12:50 -04001496 b43_pci_ssb_bridge_exit();
1497 bus_unregister(&ssb_bustype);
1498}
1499module_exit(ssb_modexit)