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1/*
2 * Broadcom specific AMBA
3 * Bus subsystem
4 *
5 * Licensed under the GNU/GPL. See COPYING for details.
6 */
7
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_device.h>
18#include <linux/of_platform.h>
19
20MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
21MODULE_LICENSE("GPL");
22
23/* contains the number the next bus should get. */
24static unsigned int bcma_bus_next_num;
25
26/* bcma_buses_mutex locks the bcma_bus_next_num */
27static DEFINE_MUTEX(bcma_buses_mutex);
28
29static int bcma_bus_match(struct device *dev, struct device_driver *drv);
30static int bcma_device_probe(struct device *dev);
31static void bcma_device_remove(struct device *dev);
32static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env);
33
34static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
35{
36 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
37 return sprintf(buf, "0x%03X\n", core->id.manuf);
38}
39static DEVICE_ATTR_RO(manuf);
40
41static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
42{
43 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
44 return sprintf(buf, "0x%03X\n", core->id.id);
45}
46static DEVICE_ATTR_RO(id);
47
48static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
49{
50 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
51 return sprintf(buf, "0x%02X\n", core->id.rev);
52}
53static DEVICE_ATTR_RO(rev);
54
55static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
56{
57 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
58 return sprintf(buf, "0x%X\n", core->id.class);
59}
60static DEVICE_ATTR_RO(class);
61
62static struct attribute *bcma_device_attrs[] = {
63 &dev_attr_manuf.attr,
64 &dev_attr_id.attr,
65 &dev_attr_rev.attr,
66 &dev_attr_class.attr,
67 NULL,
68};
69ATTRIBUTE_GROUPS(bcma_device);
70
71static struct bus_type bcma_bus_type = {
72 .name = "bcma",
73 .match = bcma_bus_match,
74 .probe = bcma_device_probe,
75 .remove = bcma_device_remove,
76 .uevent = bcma_device_uevent,
77 .dev_groups = bcma_device_groups,
78};
79
80static u16 bcma_cc_core_id(struct bcma_bus *bus)
81{
82 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
83 return BCMA_CORE_4706_CHIPCOMMON;
84 return BCMA_CORE_CHIPCOMMON;
85}
86
87struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
88 u8 unit)
89{
90 struct bcma_device *core;
91
92 list_for_each_entry(core, &bus->cores, list) {
93 if (core->id.id == coreid && core->core_unit == unit)
94 return core;
95 }
96 return NULL;
97}
98EXPORT_SYMBOL_GPL(bcma_find_core_unit);
99
100bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
101 int timeout)
102{
103 unsigned long deadline = jiffies + timeout;
104 u32 val;
105
106 do {
107 val = bcma_read32(core, reg);
108 if ((val & mask) == value)
109 return true;
110 cpu_relax();
111 udelay(10);
112 } while (!time_after_eq(jiffies, deadline));
113
114 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
115
116 return false;
117}
118
119static void bcma_release_core_dev(struct device *dev)
120{
121 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
122 if (core->io_addr)
123 iounmap(core->io_addr);
124 if (core->io_wrap)
125 iounmap(core->io_wrap);
126 kfree(core);
127}
128
129static bool bcma_is_core_needed_early(u16 core_id)
130{
131 switch (core_id) {
132 case BCMA_CORE_NS_NAND:
133 case BCMA_CORE_NS_QSPI:
134 return true;
135 }
136
137 return false;
138}
139
140static struct device_node *bcma_of_find_child_device(struct device *parent,
141 struct bcma_device *core)
142{
143 struct device_node *node;
144 int ret;
145
146 if (!parent->of_node)
147 return NULL;
148
149 for_each_child_of_node(parent->of_node, node) {
150 struct resource res;
151 ret = of_address_to_resource(node, 0, &res);
152 if (ret)
153 continue;
154 if (res.start == core->addr)
155 return node;
156 }
157 return NULL;
158}
159
160static int bcma_of_irq_parse(struct device *parent,
161 struct bcma_device *core,
162 struct of_phandle_args *out_irq, int num)
163{
164 __be32 laddr[1];
165 int rc;
166
167 if (core->dev.of_node) {
168 rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
169 if (!rc)
170 return rc;
171 }
172
173 out_irq->np = parent->of_node;
174 out_irq->args_count = 1;
175 out_irq->args[0] = num;
176
177 laddr[0] = cpu_to_be32(core->addr);
178 return of_irq_parse_raw(laddr, out_irq);
179}
180
181static unsigned int bcma_of_get_irq(struct device *parent,
182 struct bcma_device *core, int num)
183{
184 struct of_phandle_args out_irq;
185 int ret;
186
187 if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent->of_node)
188 return 0;
189
190 ret = bcma_of_irq_parse(parent, core, &out_irq, num);
191 if (ret) {
192 bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
193 ret);
194 return 0;
195 }
196
197 return irq_create_of_mapping(&out_irq);
198}
199
200static void bcma_of_fill_device(struct device *parent,
201 struct bcma_device *core)
202{
203 struct device_node *node;
204
205 node = bcma_of_find_child_device(parent, core);
206 if (node)
207 core->dev.of_node = node;
208
209 core->irq = bcma_of_get_irq(parent, core, 0);
210
211 of_dma_configure(&core->dev, node, false);
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->dev)
228 return bcma_of_get_irq(bus->dev, 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 device_initialize(&core->dev);
241 core->dev.release = bcma_release_core_dev;
242 core->dev.bus = &bcma_bus_type;
243 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
244 core->dev.parent = bus->dev;
245 if (bus->dev)
246 bcma_of_fill_device(bus->dev, core);
247
248 switch (bus->hosttype) {
249 case BCMA_HOSTTYPE_PCI:
250 core->dma_dev = bus->dev;
251 core->irq = bus->host_pci->irq;
252 break;
253 case BCMA_HOSTTYPE_SOC:
254 if (IS_ENABLED(CONFIG_OF) && bus->dev) {
255 core->dma_dev = bus->dev;
256 } else {
257 core->dev.dma_mask = &core->dev.coherent_dma_mask;
258 core->dma_dev = &core->dev;
259 }
260 break;
261 case BCMA_HOSTTYPE_SDIO:
262 break;
263 }
264}
265
266void bcma_init_bus(struct bcma_bus *bus)
267{
268 mutex_lock(&bcma_buses_mutex);
269 bus->num = bcma_bus_next_num++;
270 mutex_unlock(&bcma_buses_mutex);
271
272 INIT_LIST_HEAD(&bus->cores);
273 bus->nr_cores = 0;
274
275 bcma_detect_chip(bus);
276}
277
278static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
279{
280 int err;
281
282 err = device_add(&core->dev);
283 if (err) {
284 bcma_err(bus, "Could not register dev for core 0x%03X\n",
285 core->id.id);
286 return;
287 }
288 core->dev_registered = true;
289}
290
291static int bcma_register_devices(struct bcma_bus *bus)
292{
293 struct bcma_device *core;
294 int err;
295
296 list_for_each_entry(core, &bus->cores, list) {
297 /* We support that core ourselves */
298 switch (core->id.id) {
299 case BCMA_CORE_4706_CHIPCOMMON:
300 case BCMA_CORE_CHIPCOMMON:
301 case BCMA_CORE_NS_CHIPCOMMON_B:
302 case BCMA_CORE_PCI:
303 case BCMA_CORE_PCIE:
304 case BCMA_CORE_PCIE2:
305 case BCMA_CORE_MIPS_74K:
306 case BCMA_CORE_4706_MAC_GBIT_COMMON:
307 continue;
308 }
309
310 /* Early cores were already registered */
311 if (bcma_is_core_needed_early(core->id.id))
312 continue;
313
314 /* Only first GMAC core on BCM4706 is connected and working */
315 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
316 core->core_unit > 0)
317 continue;
318
319 bcma_register_core(bus, core);
320 }
321
322#ifdef CONFIG_BCMA_PFLASH
323 if (bus->drv_cc.pflash.present) {
324 err = platform_device_register(&bcma_pflash_dev);
325 if (err)
326 bcma_err(bus, "Error registering parallel flash\n");
327 }
328#endif
329
330#ifdef CONFIG_BCMA_SFLASH
331 if (bus->drv_cc.sflash.present) {
332 err = platform_device_register(&bcma_sflash_dev);
333 if (err)
334 bcma_err(bus, "Error registering serial flash\n");
335 }
336#endif
337
338#ifdef CONFIG_BCMA_NFLASH
339 if (bus->drv_cc.nflash.present) {
340 err = platform_device_register(&bcma_nflash_dev);
341 if (err)
342 bcma_err(bus, "Error registering NAND flash\n");
343 }
344#endif
345 err = bcma_gpio_init(&bus->drv_cc);
346 if (err == -ENOTSUPP)
347 bcma_debug(bus, "GPIO driver not activated\n");
348 else if (err) {
349 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
350 return err;
351 }
352
353 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
354 err = bcma_chipco_watchdog_register(&bus->drv_cc);
355 if (err)
356 bcma_err(bus, "Error registering watchdog driver\n");
357 }
358
359 return 0;
360}
361
362void bcma_unregister_cores(struct bcma_bus *bus)
363{
364 struct bcma_device *core, *tmp;
365
366 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
367 if (!core->dev_registered)
368 continue;
369 list_del(&core->list);
370 device_unregister(&core->dev);
371 }
372 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
373 platform_device_unregister(bus->drv_cc.watchdog);
374
375 /* Now no one uses internally-handled cores, we can free them */
376 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
377 list_del(&core->list);
378 put_device(&core->dev);
379 }
380}
381
382int bcma_bus_register(struct bcma_bus *bus)
383{
384 int err;
385 struct bcma_device *core;
386
387 /* Scan for devices (cores) */
388 err = bcma_bus_scan(bus);
389 if (err) {
390 bcma_err(bus, "Failed to scan: %d\n", err);
391 return err;
392 }
393
394 /* Early init CC core */
395 core = bcma_find_core(bus, bcma_cc_core_id(bus));
396 if (core) {
397 bus->drv_cc.core = core;
398 bcma_core_chipcommon_early_init(&bus->drv_cc);
399 }
400
401 /* Early init PCIE core */
402 core = bcma_find_core(bus, BCMA_CORE_PCIE);
403 if (core) {
404 bus->drv_pci[0].core = core;
405 bcma_core_pci_early_init(&bus->drv_pci[0]);
406 }
407
408 if (bus->dev)
409 of_platform_default_populate(bus->dev->of_node, NULL, bus->dev);
410
411 /* Cores providing flash access go before SPROM init */
412 list_for_each_entry(core, &bus->cores, list) {
413 if (bcma_is_core_needed_early(core->id.id))
414 bcma_register_core(bus, core);
415 }
416
417 /* Try to get SPROM */
418 err = bcma_sprom_get(bus);
419 if (err == -ENOENT) {
420 bcma_err(bus, "No SPROM available\n");
421 } else if (err)
422 bcma_err(bus, "Failed to get SPROM: %d\n", err);
423
424 /* Init CC core */
425 core = bcma_find_core(bus, bcma_cc_core_id(bus));
426 if (core) {
427 bus->drv_cc.core = core;
428 bcma_core_chipcommon_init(&bus->drv_cc);
429 }
430
431 /* Init CC core */
432 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
433 if (core) {
434 bus->drv_cc_b.core = core;
435 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
436 }
437
438 /* Init MIPS core */
439 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
440 if (core) {
441 bus->drv_mips.core = core;
442 bcma_core_mips_init(&bus->drv_mips);
443 }
444
445 /* Init PCIE core */
446 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
447 if (core) {
448 bus->drv_pci[0].core = core;
449 bcma_core_pci_init(&bus->drv_pci[0]);
450 }
451
452 /* Init PCIE core */
453 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
454 if (core) {
455 bus->drv_pci[1].core = core;
456 bcma_core_pci_init(&bus->drv_pci[1]);
457 }
458
459 /* Init PCIe Gen 2 core */
460 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
461 if (core) {
462 bus->drv_pcie2.core = core;
463 bcma_core_pcie2_init(&bus->drv_pcie2);
464 }
465
466 /* Init GBIT MAC COMMON core */
467 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
468 if (core) {
469 bus->drv_gmac_cmn.core = core;
470 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
471 }
472
473 /* Register found cores */
474 bcma_register_devices(bus);
475
476 bcma_info(bus, "Bus registered\n");
477
478 return 0;
479}
480
481void bcma_bus_unregister(struct bcma_bus *bus)
482{
483 int err;
484
485 err = bcma_gpio_unregister(&bus->drv_cc);
486 if (err == -EBUSY)
487 bcma_err(bus, "Some GPIOs are still in use.\n");
488 else if (err)
489 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
490
491 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
492
493 bcma_unregister_cores(bus);
494}
495
496/*
497 * This is a special version of bus registration function designed for SoCs.
498 * It scans bus and performs basic initialization of main cores only.
499 * Please note it requires memory allocation, however it won't try to sleep.
500 */
501int __init bcma_bus_early_register(struct bcma_bus *bus)
502{
503 int err;
504 struct bcma_device *core;
505
506 /* Scan for devices (cores) */
507 err = bcma_bus_scan(bus);
508 if (err) {
509 bcma_err(bus, "Failed to scan bus: %d\n", err);
510 return -1;
511 }
512
513 /* Early init CC core */
514 core = bcma_find_core(bus, bcma_cc_core_id(bus));
515 if (core) {
516 bus->drv_cc.core = core;
517 bcma_core_chipcommon_early_init(&bus->drv_cc);
518 }
519
520 /* Early init MIPS core */
521 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
522 if (core) {
523 bus->drv_mips.core = core;
524 bcma_core_mips_early_init(&bus->drv_mips);
525 }
526
527 bcma_info(bus, "Early bus registered\n");
528
529 return 0;
530}
531
532#ifdef CONFIG_PM
533int bcma_bus_suspend(struct bcma_bus *bus)
534{
535 struct bcma_device *core;
536
537 list_for_each_entry(core, &bus->cores, list) {
538 struct device_driver *drv = core->dev.driver;
539 if (drv) {
540 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
541 if (adrv->suspend)
542 adrv->suspend(core);
543 }
544 }
545 return 0;
546}
547
548int bcma_bus_resume(struct bcma_bus *bus)
549{
550 struct bcma_device *core;
551
552 /* Init CC core */
553 if (bus->drv_cc.core) {
554 bus->drv_cc.setup_done = false;
555 bcma_core_chipcommon_init(&bus->drv_cc);
556 }
557
558 list_for_each_entry(core, &bus->cores, list) {
559 struct device_driver *drv = core->dev.driver;
560 if (drv) {
561 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
562 if (adrv->resume)
563 adrv->resume(core);
564 }
565 }
566
567 return 0;
568}
569#endif
570
571int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
572{
573 drv->drv.name = drv->name;
574 drv->drv.bus = &bcma_bus_type;
575 drv->drv.owner = owner;
576
577 return driver_register(&drv->drv);
578}
579EXPORT_SYMBOL_GPL(__bcma_driver_register);
580
581void bcma_driver_unregister(struct bcma_driver *drv)
582{
583 driver_unregister(&drv->drv);
584}
585EXPORT_SYMBOL_GPL(bcma_driver_unregister);
586
587static int bcma_bus_match(struct device *dev, struct device_driver *drv)
588{
589 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
590 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
591 const struct bcma_device_id *cid = &core->id;
592 const struct bcma_device_id *did;
593
594 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
595 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
596 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
597 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
598 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
599 return 1;
600 }
601 return 0;
602}
603
604static int bcma_device_probe(struct device *dev)
605{
606 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
607 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
608 drv);
609 int err = 0;
610
611 get_device(dev);
612 if (adrv->probe)
613 err = adrv->probe(core);
614 if (err)
615 put_device(dev);
616
617 return err;
618}
619
620static void bcma_device_remove(struct device *dev)
621{
622 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
623 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
624 drv);
625
626 if (adrv->remove)
627 adrv->remove(core);
628 put_device(dev);
629}
630
631static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
632{
633 const struct bcma_device *core = container_of_const(dev, struct bcma_device, dev);
634
635 return add_uevent_var(env,
636 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
637 core->id.manuf, core->id.id,
638 core->id.rev, core->id.class);
639}
640
641static unsigned int bcma_bus_registered;
642
643/*
644 * If built-in, bus has to be registered early, before any driver calls
645 * bcma_driver_register.
646 * Otherwise registering driver would trigger BUG in driver_register.
647 */
648static int __init bcma_init_bus_register(void)
649{
650 int err;
651
652 if (bcma_bus_registered)
653 return 0;
654
655 err = bus_register(&bcma_bus_type);
656 if (!err)
657 bcma_bus_registered = 1;
658
659 return err;
660}
661#ifndef MODULE
662fs_initcall(bcma_init_bus_register);
663#endif
664
665/* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
666static int __init bcma_modinit(void)
667{
668 int err;
669
670 err = bcma_init_bus_register();
671 if (err)
672 return err;
673
674 err = bcma_host_soc_register_driver();
675 if (err) {
676 pr_err("SoC host initialization failed\n");
677 err = 0;
678 }
679#ifdef CONFIG_BCMA_HOST_PCI
680 err = bcma_host_pci_init();
681 if (err) {
682 pr_err("PCI host initialization failed\n");
683 err = 0;
684 }
685#endif
686
687 return err;
688}
689module_init(bcma_modinit);
690
691static void __exit bcma_modexit(void)
692{
693#ifdef CONFIG_BCMA_HOST_PCI
694 bcma_host_pci_exit();
695#endif
696 bcma_host_soc_unregister_driver();
697 bus_unregister(&bcma_bus_type);
698}
699module_exit(bcma_modexit)
1/*
2 * Broadcom specific AMBA
3 * Bus subsystem
4 *
5 * Licensed under the GNU/GPL. See COPYING for details.
6 */
7
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/* contains the number the next bus should get. */
23static unsigned int bcma_bus_next_num = 0;
24
25/* bcma_buses_mutex locks the bcma_bus_next_num */
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 /* We support that cores ourself */
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 /* Early cores were already registered */
333 if (bcma_is_core_needed_early(core->id.id))
334 continue;
335
336 /* Only first GMAC core on BCM4706 is connected and working */
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 /* Now noone uses internally-handled cores, we can free them */
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 /* Scan for devices (cores) */
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 /* Early init CC core */
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 /* Early init PCIE core */
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 /* Cores providing flash access go before SPROM init */
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 /* Try to get SPROM */
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 /* Init CC core */
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 /* Init CC core */
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 /* Init MIPS core */
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 /* Init PCIE core */
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 /* Init PCIE core */
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 /* Init PCIe Gen 2 core */
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 /* Init GBIT MAC COMMON core */
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 /* Register found cores */
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 * This is a special version of bus registration function designed for SoCs.
521 * It scans bus and performs basic initialization of main cores only.
522 * Please note it requires memory allocation, however it won't try to sleep.
523 */
524int __init bcma_bus_early_register(struct bcma_bus *bus)
525{
526 int err;
527 struct bcma_device *core;
528
529 /* Scan for devices (cores) */
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 /* Early init CC core */
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 /* Early init MIPS core */
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 /* Init CC core */
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 * If built-in, bus has to be registered early, before any driver calls
666 * bcma_driver_register.
667 * Otherwise registering driver would trigger BUG in driver_register.
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/* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
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)