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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;
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 void 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 device_initialize(&core->dev);
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 core->dev.parent = bus->dev;
244 if (bus->dev)
245 bcma_of_fill_device(bus->dev, core);
246
247 switch (bus->hosttype) {
248 case BCMA_HOSTTYPE_PCI:
249 core->dma_dev = bus->dev;
250 core->irq = bus->host_pci->irq;
251 break;
252 case BCMA_HOSTTYPE_SOC:
253 if (IS_ENABLED(CONFIG_OF) && bus->dev) {
254 core->dma_dev = bus->dev;
255 } else {
256 core->dev.dma_mask = &core->dev.coherent_dma_mask;
257 core->dma_dev = &core->dev;
258 }
259 break;
260 case BCMA_HOSTTYPE_SDIO:
261 break;
262 }
263}
264
265void bcma_init_bus(struct bcma_bus *bus)
266{
267 mutex_lock(&bcma_buses_mutex);
268 bus->num = bcma_bus_next_num++;
269 mutex_unlock(&bcma_buses_mutex);
270
271 INIT_LIST_HEAD(&bus->cores);
272 bus->nr_cores = 0;
273
274 bcma_detect_chip(bus);
275}
276
277static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
278{
279 int err;
280
281 err = device_add(&core->dev);
282 if (err) {
283 bcma_err(bus, "Could not register dev for core 0x%03X\n",
284 core->id.id);
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 /* We support that core ourselves */
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 /* Early cores were already registered */
310 if (bcma_is_core_needed_early(core->id.id))
311 continue;
312
313 /* Only first GMAC core on BCM4706 is connected and working */
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 return err;
350 }
351
352 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
353 err = bcma_chipco_watchdog_register(&bus->drv_cc);
354 if (err)
355 bcma_err(bus, "Error registering watchdog driver\n");
356 }
357
358 return 0;
359}
360
361void bcma_unregister_cores(struct bcma_bus *bus)
362{
363 struct bcma_device *core, *tmp;
364
365 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
366 if (!core->dev_registered)
367 continue;
368 list_del(&core->list);
369 device_unregister(&core->dev);
370 }
371 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
372 platform_device_unregister(bus->drv_cc.watchdog);
373
374 /* Now no one uses internally-handled cores, we can free them */
375 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
376 list_del(&core->list);
377 put_device(&core->dev);
378 }
379}
380
381int bcma_bus_register(struct bcma_bus *bus)
382{
383 int err;
384 struct bcma_device *core;
385
386 /* Scan for devices (cores) */
387 err = bcma_bus_scan(bus);
388 if (err) {
389 bcma_err(bus, "Failed to scan: %d\n", err);
390 return err;
391 }
392
393 /* Early init CC core */
394 core = bcma_find_core(bus, bcma_cc_core_id(bus));
395 if (core) {
396 bus->drv_cc.core = core;
397 bcma_core_chipcommon_early_init(&bus->drv_cc);
398 }
399
400 /* Early init PCIE core */
401 core = bcma_find_core(bus, BCMA_CORE_PCIE);
402 if (core) {
403 bus->drv_pci[0].core = core;
404 bcma_core_pci_early_init(&bus->drv_pci[0]);
405 }
406
407 if (bus->dev)
408 of_platform_default_populate(bus->dev->of_node, NULL, bus->dev);
409
410 /* Cores providing flash access go before SPROM init */
411 list_for_each_entry(core, &bus->cores, list) {
412 if (bcma_is_core_needed_early(core->id.id))
413 bcma_register_core(bus, core);
414 }
415
416 /* Try to get SPROM */
417 err = bcma_sprom_get(bus);
418 if (err == -ENOENT) {
419 bcma_err(bus, "No SPROM available\n");
420 } else if (err)
421 bcma_err(bus, "Failed to get SPROM: %d\n", err);
422
423 /* Init CC core */
424 core = bcma_find_core(bus, bcma_cc_core_id(bus));
425 if (core) {
426 bus->drv_cc.core = core;
427 bcma_core_chipcommon_init(&bus->drv_cc);
428 }
429
430 /* Init CC core */
431 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
432 if (core) {
433 bus->drv_cc_b.core = core;
434 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
435 }
436
437 /* Init MIPS core */
438 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
439 if (core) {
440 bus->drv_mips.core = core;
441 bcma_core_mips_init(&bus->drv_mips);
442 }
443
444 /* Init PCIE core */
445 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
446 if (core) {
447 bus->drv_pci[0].core = core;
448 bcma_core_pci_init(&bus->drv_pci[0]);
449 }
450
451 /* Init PCIE core */
452 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
453 if (core) {
454 bus->drv_pci[1].core = core;
455 bcma_core_pci_init(&bus->drv_pci[1]);
456 }
457
458 /* Init PCIe Gen 2 core */
459 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
460 if (core) {
461 bus->drv_pcie2.core = core;
462 bcma_core_pcie2_init(&bus->drv_pcie2);
463 }
464
465 /* Init GBIT MAC COMMON core */
466 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
467 if (core) {
468 bus->drv_gmac_cmn.core = core;
469 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
470 }
471
472 /* Register found cores */
473 bcma_register_devices(bus);
474
475 bcma_info(bus, "Bus registered\n");
476
477 return 0;
478}
479
480void bcma_bus_unregister(struct bcma_bus *bus)
481{
482 int err;
483
484 err = bcma_gpio_unregister(&bus->drv_cc);
485 if (err == -EBUSY)
486 bcma_err(bus, "Some GPIOs are still in use.\n");
487 else if (err)
488 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
489
490 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
491
492 bcma_unregister_cores(bus);
493}
494
495/*
496 * This is a special version of bus registration function designed for SoCs.
497 * It scans bus and performs basic initialization of main cores only.
498 * Please note it requires memory allocation, however it won't try to sleep.
499 */
500int __init bcma_bus_early_register(struct bcma_bus *bus)
501{
502 int err;
503 struct bcma_device *core;
504
505 /* Scan for devices (cores) */
506 err = bcma_bus_scan(bus);
507 if (err) {
508 bcma_err(bus, "Failed to scan bus: %d\n", err);
509 return -1;
510 }
511
512 /* Early init CC core */
513 core = bcma_find_core(bus, bcma_cc_core_id(bus));
514 if (core) {
515 bus->drv_cc.core = core;
516 bcma_core_chipcommon_early_init(&bus->drv_cc);
517 }
518
519 /* Early init MIPS core */
520 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
521 if (core) {
522 bus->drv_mips.core = core;
523 bcma_core_mips_early_init(&bus->drv_mips);
524 }
525
526 bcma_info(bus, "Early bus registered\n");
527
528 return 0;
529}
530
531#ifdef CONFIG_PM
532int bcma_bus_suspend(struct bcma_bus *bus)
533{
534 struct bcma_device *core;
535
536 list_for_each_entry(core, &bus->cores, list) {
537 struct device_driver *drv = core->dev.driver;
538 if (drv) {
539 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
540 if (adrv->suspend)
541 adrv->suspend(core);
542 }
543 }
544 return 0;
545}
546
547int bcma_bus_resume(struct bcma_bus *bus)
548{
549 struct bcma_device *core;
550
551 /* Init CC core */
552 if (bus->drv_cc.core) {
553 bus->drv_cc.setup_done = false;
554 bcma_core_chipcommon_init(&bus->drv_cc);
555 }
556
557 list_for_each_entry(core, &bus->cores, list) {
558 struct device_driver *drv = core->dev.driver;
559 if (drv) {
560 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
561 if (adrv->resume)
562 adrv->resume(core);
563 }
564 }
565
566 return 0;
567}
568#endif
569
570int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
571{
572 drv->drv.name = drv->name;
573 drv->drv.bus = &bcma_bus_type;
574 drv->drv.owner = owner;
575
576 return driver_register(&drv->drv);
577}
578EXPORT_SYMBOL_GPL(__bcma_driver_register);
579
580void bcma_driver_unregister(struct bcma_driver *drv)
581{
582 driver_unregister(&drv->drv);
583}
584EXPORT_SYMBOL_GPL(bcma_driver_unregister);
585
586static int bcma_bus_match(struct device *dev, struct device_driver *drv)
587{
588 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
589 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
590 const struct bcma_device_id *cid = &core->id;
591 const struct bcma_device_id *did;
592
593 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
594 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
595 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
596 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
597 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
598 return 1;
599 }
600 return 0;
601}
602
603static int bcma_device_probe(struct device *dev)
604{
605 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
606 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
607 drv);
608 int err = 0;
609
610 get_device(dev);
611 if (adrv->probe)
612 err = adrv->probe(core);
613 if (err)
614 put_device(dev);
615
616 return err;
617}
618
619static void bcma_device_remove(struct device *dev)
620{
621 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
622 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
623 drv);
624
625 if (adrv->remove)
626 adrv->remove(core);
627 put_device(dev);
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 * If built-in, bus has to be registered early, before any driver calls
644 * bcma_driver_register.
645 * Otherwise registering driver would trigger BUG in driver_register.
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/* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
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)