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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 platform_device *parent,
140 struct bcma_device *core)
141{
142 struct device_node *node;
143 u64 size;
144 const __be32 *reg;
145
146 if (!parent || !parent->dev.of_node)
147 return NULL;
148
149 for_each_child_of_node(parent->dev.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 platform_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->dev.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 platform_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 || !parent->dev.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 platform_device *parent,
200 struct bcma_device *core)
201{
202 struct device_node *node;
203
204 if (!IS_ENABLED(CONFIG_OF_IRQ))
205 return;
206
207 node = bcma_of_find_child_device(parent, core);
208 if (node)
209 core->dev.of_node = node;
210
211 core->irq = bcma_of_get_irq(parent, core, 0);
212}
213
214unsigned int bcma_core_irq(struct bcma_device *core, int num)
215{
216 struct bcma_bus *bus = core->bus;
217 unsigned int mips_irq;
218
219 switch (bus->hosttype) {
220 case BCMA_HOSTTYPE_PCI:
221 return bus->host_pci->irq;
222 case BCMA_HOSTTYPE_SOC:
223 if (bus->drv_mips.core && num == 0) {
224 mips_irq = bcma_core_mips_irq(core);
225 return mips_irq <= 4 ? mips_irq + 2 : 0;
226 }
227 if (bus->host_pdev)
228 return bcma_of_get_irq(bus->host_pdev, core, num);
229 return 0;
230 case BCMA_HOSTTYPE_SDIO:
231 return 0;
232 }
233
234 return 0;
235}
236EXPORT_SYMBOL(bcma_core_irq);
237
238void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
239{
240 core->dev.release = bcma_release_core_dev;
241 core->dev.bus = &bcma_bus_type;
242 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
243
244 switch (bus->hosttype) {
245 case BCMA_HOSTTYPE_PCI:
246 core->dev.parent = &bus->host_pci->dev;
247 core->dma_dev = &bus->host_pci->dev;
248 core->irq = bus->host_pci->irq;
249 break;
250 case BCMA_HOSTTYPE_SOC:
251 core->dev.dma_mask = &core->dev.coherent_dma_mask;
252 if (bus->host_pdev) {
253 core->dma_dev = &bus->host_pdev->dev;
254 core->dev.parent = &bus->host_pdev->dev;
255 bcma_of_fill_device(bus->host_pdev, core);
256 } else {
257 core->dma_dev = &core->dev;
258 }
259 break;
260 case BCMA_HOSTTYPE_SDIO:
261 break;
262 }
263}
264
265struct device *bcma_bus_get_host_dev(struct bcma_bus *bus)
266{
267 switch (bus->hosttype) {
268 case BCMA_HOSTTYPE_PCI:
269 if (bus->host_pci)
270 return &bus->host_pci->dev;
271 else
272 return NULL;
273 case BCMA_HOSTTYPE_SOC:
274 if (bus->host_pdev)
275 return &bus->host_pdev->dev;
276 else
277 return NULL;
278 case BCMA_HOSTTYPE_SDIO:
279 if (bus->host_sdio)
280 return &bus->host_sdio->dev;
281 else
282 return NULL;
283 }
284 return NULL;
285}
286
287void bcma_init_bus(struct bcma_bus *bus)
288{
289 mutex_lock(&bcma_buses_mutex);
290 bus->num = bcma_bus_next_num++;
291 mutex_unlock(&bcma_buses_mutex);
292
293 INIT_LIST_HEAD(&bus->cores);
294 bus->nr_cores = 0;
295
296 bcma_detect_chip(bus);
297}
298
299static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
300{
301 int err;
302
303 err = device_register(&core->dev);
304 if (err) {
305 bcma_err(bus, "Could not register dev for core 0x%03X\n",
306 core->id.id);
307 put_device(&core->dev);
308 return;
309 }
310 core->dev_registered = true;
311}
312
313static int bcma_register_devices(struct bcma_bus *bus)
314{
315 struct bcma_device *core;
316 int err;
317
318 list_for_each_entry(core, &bus->cores, list) {
319
320 switch (core->id.id) {
321 case BCMA_CORE_4706_CHIPCOMMON:
322 case BCMA_CORE_CHIPCOMMON:
323 case BCMA_CORE_NS_CHIPCOMMON_B:
324 case BCMA_CORE_PCI:
325 case BCMA_CORE_PCIE:
326 case BCMA_CORE_PCIE2:
327 case BCMA_CORE_MIPS_74K:
328 case BCMA_CORE_4706_MAC_GBIT_COMMON:
329 continue;
330 }
331
332
333 if (bcma_is_core_needed_early(core->id.id))
334 continue;
335
336
337 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
338 core->core_unit > 0)
339 continue;
340
341 bcma_register_core(bus, core);
342 }
343
344#ifdef CONFIG_BCMA_PFLASH
345 if (bus->drv_cc.pflash.present) {
346 err = platform_device_register(&bcma_pflash_dev);
347 if (err)
348 bcma_err(bus, "Error registering parallel flash\n");
349 }
350#endif
351
352#ifdef CONFIG_BCMA_SFLASH
353 if (bus->drv_cc.sflash.present) {
354 err = platform_device_register(&bcma_sflash_dev);
355 if (err)
356 bcma_err(bus, "Error registering serial flash\n");
357 }
358#endif
359
360#ifdef CONFIG_BCMA_NFLASH
361 if (bus->drv_cc.nflash.present) {
362 err = platform_device_register(&bcma_nflash_dev);
363 if (err)
364 bcma_err(bus, "Error registering NAND flash\n");
365 }
366#endif
367 err = bcma_gpio_init(&bus->drv_cc);
368 if (err == -ENOTSUPP)
369 bcma_debug(bus, "GPIO driver not activated\n");
370 else if (err)
371 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
372
373 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
374 err = bcma_chipco_watchdog_register(&bus->drv_cc);
375 if (err)
376 bcma_err(bus, "Error registering watchdog driver\n");
377 }
378
379 return 0;
380}
381
382void bcma_unregister_cores(struct bcma_bus *bus)
383{
384 struct bcma_device *core, *tmp;
385
386 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
387 if (!core->dev_registered)
388 continue;
389 list_del(&core->list);
390 device_unregister(&core->dev);
391 }
392 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
393 platform_device_unregister(bus->drv_cc.watchdog);
394
395
396 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
397 list_del(&core->list);
398 kfree(core);
399 }
400}
401
402int bcma_bus_register(struct bcma_bus *bus)
403{
404 int err;
405 struct bcma_device *core;
406 struct device *dev;
407
408
409 err = bcma_bus_scan(bus);
410 if (err) {
411 bcma_err(bus, "Failed to scan: %d\n", err);
412 return err;
413 }
414
415
416 core = bcma_find_core(bus, bcma_cc_core_id(bus));
417 if (core) {
418 bus->drv_cc.core = core;
419 bcma_core_chipcommon_early_init(&bus->drv_cc);
420 }
421
422
423 core = bcma_find_core(bus, BCMA_CORE_PCIE);
424 if (core) {
425 bus->drv_pci[0].core = core;
426 bcma_core_pci_early_init(&bus->drv_pci[0]);
427 }
428
429 dev = bcma_bus_get_host_dev(bus);
430 if (dev) {
431 of_platform_default_populate(dev->of_node, NULL, dev);
432 }
433
434
435 list_for_each_entry(core, &bus->cores, list) {
436 if (bcma_is_core_needed_early(core->id.id))
437 bcma_register_core(bus, core);
438 }
439
440
441 err = bcma_sprom_get(bus);
442 if (err == -ENOENT) {
443 bcma_err(bus, "No SPROM available\n");
444 } else if (err)
445 bcma_err(bus, "Failed to get SPROM: %d\n", err);
446
447
448 core = bcma_find_core(bus, bcma_cc_core_id(bus));
449 if (core) {
450 bus->drv_cc.core = core;
451 bcma_core_chipcommon_init(&bus->drv_cc);
452 }
453
454
455 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
456 if (core) {
457 bus->drv_cc_b.core = core;
458 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
459 }
460
461
462 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
463 if (core) {
464 bus->drv_mips.core = core;
465 bcma_core_mips_init(&bus->drv_mips);
466 }
467
468
469 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
470 if (core) {
471 bus->drv_pci[0].core = core;
472 bcma_core_pci_init(&bus->drv_pci[0]);
473 }
474
475
476 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
477 if (core) {
478 bus->drv_pci[1].core = core;
479 bcma_core_pci_init(&bus->drv_pci[1]);
480 }
481
482
483 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
484 if (core) {
485 bus->drv_pcie2.core = core;
486 bcma_core_pcie2_init(&bus->drv_pcie2);
487 }
488
489
490 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
491 if (core) {
492 bus->drv_gmac_cmn.core = core;
493 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
494 }
495
496
497 bcma_register_devices(bus);
498
499 bcma_info(bus, "Bus registered\n");
500
501 return 0;
502}
503
504void bcma_bus_unregister(struct bcma_bus *bus)
505{
506 int err;
507
508 err = bcma_gpio_unregister(&bus->drv_cc);
509 if (err == -EBUSY)
510 bcma_err(bus, "Some GPIOs are still in use.\n");
511 else if (err)
512 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
513
514 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
515
516 bcma_unregister_cores(bus);
517}
518
519
520
521
522
523
524int __init bcma_bus_early_register(struct bcma_bus *bus)
525{
526 int err;
527 struct bcma_device *core;
528
529
530 err = bcma_bus_scan(bus);
531 if (err) {
532 bcma_err(bus, "Failed to scan bus: %d\n", err);
533 return -1;
534 }
535
536
537 core = bcma_find_core(bus, bcma_cc_core_id(bus));
538 if (core) {
539 bus->drv_cc.core = core;
540 bcma_core_chipcommon_early_init(&bus->drv_cc);
541 }
542
543
544 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
545 if (core) {
546 bus->drv_mips.core = core;
547 bcma_core_mips_early_init(&bus->drv_mips);
548 }
549
550 bcma_info(bus, "Early bus registered\n");
551
552 return 0;
553}
554
555#ifdef CONFIG_PM
556int bcma_bus_suspend(struct bcma_bus *bus)
557{
558 struct bcma_device *core;
559
560 list_for_each_entry(core, &bus->cores, list) {
561 struct device_driver *drv = core->dev.driver;
562 if (drv) {
563 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
564 if (adrv->suspend)
565 adrv->suspend(core);
566 }
567 }
568 return 0;
569}
570
571int bcma_bus_resume(struct bcma_bus *bus)
572{
573 struct bcma_device *core;
574
575
576 if (bus->drv_cc.core) {
577 bus->drv_cc.setup_done = false;
578 bcma_core_chipcommon_init(&bus->drv_cc);
579 }
580
581 list_for_each_entry(core, &bus->cores, list) {
582 struct device_driver *drv = core->dev.driver;
583 if (drv) {
584 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
585 if (adrv->resume)
586 adrv->resume(core);
587 }
588 }
589
590 return 0;
591}
592#endif
593
594int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
595{
596 drv->drv.name = drv->name;
597 drv->drv.bus = &bcma_bus_type;
598 drv->drv.owner = owner;
599
600 return driver_register(&drv->drv);
601}
602EXPORT_SYMBOL_GPL(__bcma_driver_register);
603
604void bcma_driver_unregister(struct bcma_driver *drv)
605{
606 driver_unregister(&drv->drv);
607}
608EXPORT_SYMBOL_GPL(bcma_driver_unregister);
609
610static int bcma_bus_match(struct device *dev, struct device_driver *drv)
611{
612 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
613 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
614 const struct bcma_device_id *cid = &core->id;
615 const struct bcma_device_id *did;
616
617 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
618 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
619 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
620 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
621 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
622 return 1;
623 }
624 return 0;
625}
626
627static int bcma_device_probe(struct device *dev)
628{
629 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
630 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
631 drv);
632 int err = 0;
633
634 if (adrv->probe)
635 err = adrv->probe(core);
636
637 return err;
638}
639
640static int bcma_device_remove(struct device *dev)
641{
642 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
643 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
644 drv);
645
646 if (adrv->remove)
647 adrv->remove(core);
648
649 return 0;
650}
651
652static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
653{
654 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
655
656 return add_uevent_var(env,
657 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
658 core->id.manuf, core->id.id,
659 core->id.rev, core->id.class);
660}
661
662static unsigned int bcma_bus_registered;
663
664
665
666
667
668
669static int __init bcma_init_bus_register(void)
670{
671 int err;
672
673 if (bcma_bus_registered)
674 return 0;
675
676 err = bus_register(&bcma_bus_type);
677 if (!err)
678 bcma_bus_registered = 1;
679
680 return err;
681}
682#ifndef MODULE
683fs_initcall(bcma_init_bus_register);
684#endif
685
686
687static int __init bcma_modinit(void)
688{
689 int err;
690
691 err = bcma_init_bus_register();
692 if (err)
693 return err;
694
695 err = bcma_host_soc_register_driver();
696 if (err) {
697 pr_err("SoC host initialization failed\n");
698 err = 0;
699 }
700#ifdef CONFIG_BCMA_HOST_PCI
701 err = bcma_host_pci_init();
702 if (err) {
703 pr_err("PCI host initialization failed\n");
704 err = 0;
705 }
706#endif
707
708 return err;
709}
710module_init(bcma_modinit);
711
712static void __exit bcma_modexit(void)
713{
714#ifdef CONFIG_BCMA_HOST_PCI
715 bcma_host_pci_exit();
716#endif
717 bcma_host_soc_unregister_driver();
718 bus_unregister(&bcma_bus_type);
719}
720module_exit(bcma_modexit)
721
