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8#include "bcma_private.h"
9#include <linux/module.h>
10#include <linux/mmc/sdio_func.h>
11#include <linux/platform_device.h>
12#include <linux/pci.h>
13#include <linux/bcma/bcma.h>
14#include <linux/slab.h>
15#include <linux/of_address.h>
16#include <linux/of_irq.h>
17#include <linux/of_platform.h>
18
19MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
20MODULE_LICENSE("GPL");
21
22
23static unsigned int bcma_bus_next_num = 0;
24
25
26static DEFINE_MUTEX(bcma_buses_mutex);
27
28static int bcma_bus_match(struct device *dev, struct device_driver *drv);
29static int bcma_device_probe(struct device *dev);
30static int bcma_device_remove(struct device *dev);
31static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
32
33static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
34{
35 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
36 return sprintf(buf, "0x%03X\n", core->id.manuf);
37}
38static DEVICE_ATTR_RO(manuf);
39
40static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
41{
42 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
43 return sprintf(buf, "0x%03X\n", core->id.id);
44}
45static DEVICE_ATTR_RO(id);
46
47static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
48{
49 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
50 return sprintf(buf, "0x%02X\n", core->id.rev);
51}
52static DEVICE_ATTR_RO(rev);
53
54static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
55{
56 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
57 return sprintf(buf, "0x%X\n", core->id.class);
58}
59static DEVICE_ATTR_RO(class);
60
61static struct attribute *bcma_device_attrs[] = {
62 &dev_attr_manuf.attr,
63 &dev_attr_id.attr,
64 &dev_attr_rev.attr,
65 &dev_attr_class.attr,
66 NULL,
67};
68ATTRIBUTE_GROUPS(bcma_device);
69
70static struct bus_type bcma_bus_type = {
71 .name = "bcma",
72 .match = bcma_bus_match,
73 .probe = bcma_device_probe,
74 .remove = bcma_device_remove,
75 .uevent = bcma_device_uevent,
76 .dev_groups = bcma_device_groups,
77};
78
79static u16 bcma_cc_core_id(struct bcma_bus *bus)
80{
81 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
82 return BCMA_CORE_4706_CHIPCOMMON;
83 return BCMA_CORE_CHIPCOMMON;
84}
85
86struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
87 u8 unit)
88{
89 struct bcma_device *core;
90
91 list_for_each_entry(core, &bus->cores, list) {
92 if (core->id.id == coreid && core->core_unit == unit)
93 return core;
94 }
95 return NULL;
96}
97EXPORT_SYMBOL_GPL(bcma_find_core_unit);
98
99bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
100 int timeout)
101{
102 unsigned long deadline = jiffies + timeout;
103 u32 val;
104
105 do {
106 val = bcma_read32(core, reg);
107 if ((val & mask) == value)
108 return true;
109 cpu_relax();
110 udelay(10);
111 } while (!time_after_eq(jiffies, deadline));
112
113 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
114
115 return false;
116}
117
118static void bcma_release_core_dev(struct device *dev)
119{
120 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
121 if (core->io_addr)
122 iounmap(core->io_addr);
123 if (core->io_wrap)
124 iounmap(core->io_wrap);
125 kfree(core);
126}
127
128static bool bcma_is_core_needed_early(u16 core_id)
129{
130 switch (core_id) {
131 case BCMA_CORE_NS_NAND:
132 case BCMA_CORE_NS_QSPI:
133 return true;
134 }
135
136 return false;
137}
138
139static struct device_node *bcma_of_find_child_device(struct device *parent,
140 struct bcma_device *core)
141{
142 struct device_node *node;
143 u64 size;
144 const __be32 *reg;
145
146 if (!parent->of_node)
147 return NULL;
148
149 for_each_child_of_node(parent->of_node, node) {
150 reg = of_get_address(node, 0, &size, NULL);
151 if (!reg)
152 continue;
153 if (of_translate_address(node, reg) == core->addr)
154 return node;
155 }
156 return NULL;
157}
158
159static int bcma_of_irq_parse(struct device *parent,
160 struct bcma_device *core,
161 struct of_phandle_args *out_irq, int num)
162{
163 __be32 laddr[1];
164 int rc;
165
166 if (core->dev.of_node) {
167 rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
168 if (!rc)
169 return rc;
170 }
171
172 out_irq->np = parent->of_node;
173 out_irq->args_count = 1;
174 out_irq->args[0] = num;
175
176 laddr[0] = cpu_to_be32(core->addr);
177 return of_irq_parse_raw(laddr, out_irq);
178}
179
180static unsigned int bcma_of_get_irq(struct device *parent,
181 struct bcma_device *core, int num)
182{
183 struct of_phandle_args out_irq;
184 int ret;
185
186 if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent->of_node)
187 return 0;
188
189 ret = bcma_of_irq_parse(parent, core, &out_irq, num);
190 if (ret) {
191 bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
192 ret);
193 return 0;
194 }
195
196 return irq_create_of_mapping(&out_irq);
197}
198
199static void bcma_of_fill_device(struct device *parent,
200 struct bcma_device *core)
201{
202 struct device_node *node;
203
204 node = bcma_of_find_child_device(parent, core);
205 if (node)
206 core->dev.of_node = node;
207
208 core->irq = bcma_of_get_irq(parent, core, 0);
209
210 of_dma_configure(&core->dev, node, false);
211}
212
213unsigned int bcma_core_irq(struct bcma_device *core, int num)
214{
215 struct bcma_bus *bus = core->bus;
216 unsigned int mips_irq;
217
218 switch (bus->hosttype) {
219 case BCMA_HOSTTYPE_PCI:
220 return bus->host_pci->irq;
221 case BCMA_HOSTTYPE_SOC:
222 if (bus->drv_mips.core && num == 0) {
223 mips_irq = bcma_core_mips_irq(core);
224 return mips_irq <= 4 ? mips_irq + 2 : 0;
225 }
226 if (bus->dev)
227 return bcma_of_get_irq(bus->dev, core, num);
228 return 0;
229 case BCMA_HOSTTYPE_SDIO:
230 return 0;
231 }
232
233 return 0;
234}
235EXPORT_SYMBOL(bcma_core_irq);
236
237void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
238{
239 core->dev.release = bcma_release_core_dev;
240 core->dev.bus = &bcma_bus_type;
241 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
242 core->dev.parent = bus->dev;
243 if (bus->dev)
244 bcma_of_fill_device(bus->dev, core);
245
246 switch (bus->hosttype) {
247 case BCMA_HOSTTYPE_PCI:
248 core->dma_dev = bus->dev;
249 core->irq = bus->host_pci->irq;
250 break;
251 case BCMA_HOSTTYPE_SOC:
252 if (IS_ENABLED(CONFIG_OF) && bus->dev) {
253 core->dma_dev = bus->dev;
254 } else {
255 core->dev.dma_mask = &core->dev.coherent_dma_mask;
256 core->dma_dev = &core->dev;
257 }
258 break;
259 case BCMA_HOSTTYPE_SDIO:
260 break;
261 }
262}
263
264void bcma_init_bus(struct bcma_bus *bus)
265{
266 mutex_lock(&bcma_buses_mutex);
267 bus->num = bcma_bus_next_num++;
268 mutex_unlock(&bcma_buses_mutex);
269
270 INIT_LIST_HEAD(&bus->cores);
271 bus->nr_cores = 0;
272
273 bcma_detect_chip(bus);
274}
275
276static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
277{
278 int err;
279
280 err = device_register(&core->dev);
281 if (err) {
282 bcma_err(bus, "Could not register dev for core 0x%03X\n",
283 core->id.id);
284 put_device(&core->dev);
285 return;
286 }
287 core->dev_registered = true;
288}
289
290static int bcma_register_devices(struct bcma_bus *bus)
291{
292 struct bcma_device *core;
293 int err;
294
295 list_for_each_entry(core, &bus->cores, list) {
296
297 switch (core->id.id) {
298 case BCMA_CORE_4706_CHIPCOMMON:
299 case BCMA_CORE_CHIPCOMMON:
300 case BCMA_CORE_NS_CHIPCOMMON_B:
301 case BCMA_CORE_PCI:
302 case BCMA_CORE_PCIE:
303 case BCMA_CORE_PCIE2:
304 case BCMA_CORE_MIPS_74K:
305 case BCMA_CORE_4706_MAC_GBIT_COMMON:
306 continue;
307 }
308
309
310 if (bcma_is_core_needed_early(core->id.id))
311 continue;
312
313
314 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
315 core->core_unit > 0)
316 continue;
317
318 bcma_register_core(bus, core);
319 }
320
321#ifdef CONFIG_BCMA_PFLASH
322 if (bus->drv_cc.pflash.present) {
323 err = platform_device_register(&bcma_pflash_dev);
324 if (err)
325 bcma_err(bus, "Error registering parallel flash\n");
326 }
327#endif
328
329#ifdef CONFIG_BCMA_SFLASH
330 if (bus->drv_cc.sflash.present) {
331 err = platform_device_register(&bcma_sflash_dev);
332 if (err)
333 bcma_err(bus, "Error registering serial flash\n");
334 }
335#endif
336
337#ifdef CONFIG_BCMA_NFLASH
338 if (bus->drv_cc.nflash.present) {
339 err = platform_device_register(&bcma_nflash_dev);
340 if (err)
341 bcma_err(bus, "Error registering NAND flash\n");
342 }
343#endif
344 err = bcma_gpio_init(&bus->drv_cc);
345 if (err == -ENOTSUPP)
346 bcma_debug(bus, "GPIO driver not activated\n");
347 else if (err)
348 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
349
350 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
351 err = bcma_chipco_watchdog_register(&bus->drv_cc);
352 if (err)
353 bcma_err(bus, "Error registering watchdog driver\n");
354 }
355
356 return 0;
357}
358
359void bcma_unregister_cores(struct bcma_bus *bus)
360{
361 struct bcma_device *core, *tmp;
362
363 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
364 if (!core->dev_registered)
365 continue;
366 list_del(&core->list);
367 device_unregister(&core->dev);
368 }
369 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
370 platform_device_unregister(bus->drv_cc.watchdog);
371
372
373 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
374 list_del(&core->list);
375 kfree(core);
376 }
377}
378
379int bcma_bus_register(struct bcma_bus *bus)
380{
381 int err;
382 struct bcma_device *core;
383
384
385 err = bcma_bus_scan(bus);
386 if (err) {
387 bcma_err(bus, "Failed to scan: %d\n", err);
388 return err;
389 }
390
391
392 core = bcma_find_core(bus, bcma_cc_core_id(bus));
393 if (core) {
394 bus->drv_cc.core = core;
395 bcma_core_chipcommon_early_init(&bus->drv_cc);
396 }
397
398
399 core = bcma_find_core(bus, BCMA_CORE_PCIE);
400 if (core) {
401 bus->drv_pci[0].core = core;
402 bcma_core_pci_early_init(&bus->drv_pci[0]);
403 }
404
405 if (bus->dev)
406 of_platform_default_populate(bus->dev->of_node, NULL, bus->dev);
407
408
409 list_for_each_entry(core, &bus->cores, list) {
410 if (bcma_is_core_needed_early(core->id.id))
411 bcma_register_core(bus, core);
412 }
413
414
415 err = bcma_sprom_get(bus);
416 if (err == -ENOENT) {
417 bcma_err(bus, "No SPROM available\n");
418 } else if (err)
419 bcma_err(bus, "Failed to get SPROM: %d\n", err);
420
421
422 core = bcma_find_core(bus, bcma_cc_core_id(bus));
423 if (core) {
424 bus->drv_cc.core = core;
425 bcma_core_chipcommon_init(&bus->drv_cc);
426 }
427
428
429 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
430 if (core) {
431 bus->drv_cc_b.core = core;
432 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
433 }
434
435
436 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
437 if (core) {
438 bus->drv_mips.core = core;
439 bcma_core_mips_init(&bus->drv_mips);
440 }
441
442
443 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
444 if (core) {
445 bus->drv_pci[0].core = core;
446 bcma_core_pci_init(&bus->drv_pci[0]);
447 }
448
449
450 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
451 if (core) {
452 bus->drv_pci[1].core = core;
453 bcma_core_pci_init(&bus->drv_pci[1]);
454 }
455
456
457 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
458 if (core) {
459 bus->drv_pcie2.core = core;
460 bcma_core_pcie2_init(&bus->drv_pcie2);
461 }
462
463
464 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
465 if (core) {
466 bus->drv_gmac_cmn.core = core;
467 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
468 }
469
470
471 bcma_register_devices(bus);
472
473 bcma_info(bus, "Bus registered\n");
474
475 return 0;
476}
477
478void bcma_bus_unregister(struct bcma_bus *bus)
479{
480 int err;
481
482 err = bcma_gpio_unregister(&bus->drv_cc);
483 if (err == -EBUSY)
484 bcma_err(bus, "Some GPIOs are still in use.\n");
485 else if (err)
486 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
487
488 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
489
490 bcma_unregister_cores(bus);
491}
492
493
494
495
496
497
498int __init bcma_bus_early_register(struct bcma_bus *bus)
499{
500 int err;
501 struct bcma_device *core;
502
503
504 err = bcma_bus_scan(bus);
505 if (err) {
506 bcma_err(bus, "Failed to scan bus: %d\n", err);
507 return -1;
508 }
509
510
511 core = bcma_find_core(bus, bcma_cc_core_id(bus));
512 if (core) {
513 bus->drv_cc.core = core;
514 bcma_core_chipcommon_early_init(&bus->drv_cc);
515 }
516
517
518 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
519 if (core) {
520 bus->drv_mips.core = core;
521 bcma_core_mips_early_init(&bus->drv_mips);
522 }
523
524 bcma_info(bus, "Early bus registered\n");
525
526 return 0;
527}
528
529#ifdef CONFIG_PM
530int bcma_bus_suspend(struct bcma_bus *bus)
531{
532 struct bcma_device *core;
533
534 list_for_each_entry(core, &bus->cores, list) {
535 struct device_driver *drv = core->dev.driver;
536 if (drv) {
537 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
538 if (adrv->suspend)
539 adrv->suspend(core);
540 }
541 }
542 return 0;
543}
544
545int bcma_bus_resume(struct bcma_bus *bus)
546{
547 struct bcma_device *core;
548
549
550 if (bus->drv_cc.core) {
551 bus->drv_cc.setup_done = false;
552 bcma_core_chipcommon_init(&bus->drv_cc);
553 }
554
555 list_for_each_entry(core, &bus->cores, list) {
556 struct device_driver *drv = core->dev.driver;
557 if (drv) {
558 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
559 if (adrv->resume)
560 adrv->resume(core);
561 }
562 }
563
564 return 0;
565}
566#endif
567
568int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
569{
570 drv->drv.name = drv->name;
571 drv->drv.bus = &bcma_bus_type;
572 drv->drv.owner = owner;
573
574 return driver_register(&drv->drv);
575}
576EXPORT_SYMBOL_GPL(__bcma_driver_register);
577
578void bcma_driver_unregister(struct bcma_driver *drv)
579{
580 driver_unregister(&drv->drv);
581}
582EXPORT_SYMBOL_GPL(bcma_driver_unregister);
583
584static int bcma_bus_match(struct device *dev, struct device_driver *drv)
585{
586 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
587 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
588 const struct bcma_device_id *cid = &core->id;
589 const struct bcma_device_id *did;
590
591 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
592 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
593 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
594 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
595 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
596 return 1;
597 }
598 return 0;
599}
600
601static int bcma_device_probe(struct device *dev)
602{
603 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
604 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
605 drv);
606 int err = 0;
607
608 get_device(dev);
609 if (adrv->probe)
610 err = adrv->probe(core);
611 if (err)
612 put_device(dev);
613
614 return err;
615}
616
617static int bcma_device_remove(struct device *dev)
618{
619 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
620 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
621 drv);
622
623 if (adrv->remove)
624 adrv->remove(core);
625 put_device(dev);
626
627 return 0;
628}
629
630static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
631{
632 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
633
634 return add_uevent_var(env,
635 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
636 core->id.manuf, core->id.id,
637 core->id.rev, core->id.class);
638}
639
640static unsigned int bcma_bus_registered;
641
642
643
644
645
646
647static int __init bcma_init_bus_register(void)
648{
649 int err;
650
651 if (bcma_bus_registered)
652 return 0;
653
654 err = bus_register(&bcma_bus_type);
655 if (!err)
656 bcma_bus_registered = 1;
657
658 return err;
659}
660#ifndef MODULE
661fs_initcall(bcma_init_bus_register);
662#endif
663
664
665static int __init bcma_modinit(void)
666{
667 int err;
668
669 err = bcma_init_bus_register();
670 if (err)
671 return err;
672
673 err = bcma_host_soc_register_driver();
674 if (err) {
675 pr_err("SoC host initialization failed\n");
676 err = 0;
677 }
678#ifdef CONFIG_BCMA_HOST_PCI
679 err = bcma_host_pci_init();
680 if (err) {
681 pr_err("PCI host initialization failed\n");
682 err = 0;
683 }
684#endif
685
686 return err;
687}
688module_init(bcma_modinit);
689
690static void __exit bcma_modexit(void)
691{
692#ifdef CONFIG_BCMA_HOST_PCI
693 bcma_host_pci_exit();
694#endif
695 bcma_host_soc_unregister_driver();
696 bus_unregister(&bcma_bus_type);
697}
698module_exit(bcma_modexit)
699
