Loading...
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 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);
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->host_pdev)
227 return bcma_of_get_irq(&bus->host_pdev->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 = bcma_bus_get_host_dev(bus);
243 if (core->dev.parent)
244 bcma_of_fill_device(core->dev.parent, core);
245
246 switch (bus->hosttype) {
247 case BCMA_HOSTTYPE_PCI:
248 core->dma_dev = &bus->host_pci->dev;
249 core->irq = bus->host_pci->irq;
250 break;
251 case BCMA_HOSTTYPE_SOC:
252 if (IS_ENABLED(CONFIG_OF) && bus->host_pdev) {
253 core->dma_dev = &bus->host_pdev->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
264struct device *bcma_bus_get_host_dev(struct bcma_bus *bus)
265{
266 switch (bus->hosttype) {
267 case BCMA_HOSTTYPE_PCI:
268 if (bus->host_pci)
269 return &bus->host_pci->dev;
270 else
271 return NULL;
272 case BCMA_HOSTTYPE_SOC:
273 if (bus->host_pdev)
274 return &bus->host_pdev->dev;
275 else
276 return NULL;
277 case BCMA_HOSTTYPE_SDIO:
278 if (bus->host_sdio)
279 return &bus->host_sdio->dev;
280 else
281 return NULL;
282 }
283 return NULL;
284}
285
286void bcma_init_bus(struct bcma_bus *bus)
287{
288 mutex_lock(&bcma_buses_mutex);
289 bus->num = bcma_bus_next_num++;
290 mutex_unlock(&bcma_buses_mutex);
291
292 INIT_LIST_HEAD(&bus->cores);
293 bus->nr_cores = 0;
294
295 bcma_detect_chip(bus);
296}
297
298static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
299{
300 int err;
301
302 err = device_register(&core->dev);
303 if (err) {
304 bcma_err(bus, "Could not register dev for core 0x%03X\n",
305 core->id.id);
306 put_device(&core->dev);
307 return;
308 }
309 core->dev_registered = true;
310}
311
312static int bcma_register_devices(struct bcma_bus *bus)
313{
314 struct bcma_device *core;
315 int err;
316
317 list_for_each_entry(core, &bus->cores, list) {
318 /* We support that cores ourself */
319 switch (core->id.id) {
320 case BCMA_CORE_4706_CHIPCOMMON:
321 case BCMA_CORE_CHIPCOMMON:
322 case BCMA_CORE_NS_CHIPCOMMON_B:
323 case BCMA_CORE_PCI:
324 case BCMA_CORE_PCIE:
325 case BCMA_CORE_PCIE2:
326 case BCMA_CORE_MIPS_74K:
327 case BCMA_CORE_4706_MAC_GBIT_COMMON:
328 continue;
329 }
330
331 /* Early cores were already registered */
332 if (bcma_is_core_needed_early(core->id.id))
333 continue;
334
335 /* Only first GMAC core on BCM4706 is connected and working */
336 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
337 core->core_unit > 0)
338 continue;
339
340 bcma_register_core(bus, core);
341 }
342
343#ifdef CONFIG_BCMA_PFLASH
344 if (bus->drv_cc.pflash.present) {
345 err = platform_device_register(&bcma_pflash_dev);
346 if (err)
347 bcma_err(bus, "Error registering parallel flash\n");
348 }
349#endif
350
351#ifdef CONFIG_BCMA_SFLASH
352 if (bus->drv_cc.sflash.present) {
353 err = platform_device_register(&bcma_sflash_dev);
354 if (err)
355 bcma_err(bus, "Error registering serial flash\n");
356 }
357#endif
358
359#ifdef CONFIG_BCMA_NFLASH
360 if (bus->drv_cc.nflash.present) {
361 err = platform_device_register(&bcma_nflash_dev);
362 if (err)
363 bcma_err(bus, "Error registering NAND flash\n");
364 }
365#endif
366 err = bcma_gpio_init(&bus->drv_cc);
367 if (err == -ENOTSUPP)
368 bcma_debug(bus, "GPIO driver not activated\n");
369 else if (err)
370 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
371
372 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
373 err = bcma_chipco_watchdog_register(&bus->drv_cc);
374 if (err)
375 bcma_err(bus, "Error registering watchdog driver\n");
376 }
377
378 return 0;
379}
380
381void bcma_unregister_cores(struct bcma_bus *bus)
382{
383 struct bcma_device *core, *tmp;
384
385 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
386 if (!core->dev_registered)
387 continue;
388 list_del(&core->list);
389 device_unregister(&core->dev);
390 }
391 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
392 platform_device_unregister(bus->drv_cc.watchdog);
393
394 /* Now noone uses internally-handled cores, we can free them */
395 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
396 list_del(&core->list);
397 kfree(core);
398 }
399}
400
401int bcma_bus_register(struct bcma_bus *bus)
402{
403 int err;
404 struct bcma_device *core;
405 struct device *dev;
406
407 /* Scan for devices (cores) */
408 err = bcma_bus_scan(bus);
409 if (err) {
410 bcma_err(bus, "Failed to scan: %d\n", err);
411 return err;
412 }
413
414 /* Early init CC core */
415 core = bcma_find_core(bus, bcma_cc_core_id(bus));
416 if (core) {
417 bus->drv_cc.core = core;
418 bcma_core_chipcommon_early_init(&bus->drv_cc);
419 }
420
421 /* Early init PCIE core */
422 core = bcma_find_core(bus, BCMA_CORE_PCIE);
423 if (core) {
424 bus->drv_pci[0].core = core;
425 bcma_core_pci_early_init(&bus->drv_pci[0]);
426 }
427
428 dev = bcma_bus_get_host_dev(bus);
429 if (dev) {
430 of_platform_default_populate(dev->of_node, NULL, dev);
431 }
432
433 /* Cores providing flash access go before SPROM init */
434 list_for_each_entry(core, &bus->cores, list) {
435 if (bcma_is_core_needed_early(core->id.id))
436 bcma_register_core(bus, core);
437 }
438
439 /* Try to get SPROM */
440 err = bcma_sprom_get(bus);
441 if (err == -ENOENT) {
442 bcma_err(bus, "No SPROM available\n");
443 } else if (err)
444 bcma_err(bus, "Failed to get SPROM: %d\n", err);
445
446 /* Init CC core */
447 core = bcma_find_core(bus, bcma_cc_core_id(bus));
448 if (core) {
449 bus->drv_cc.core = core;
450 bcma_core_chipcommon_init(&bus->drv_cc);
451 }
452
453 /* Init CC core */
454 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
455 if (core) {
456 bus->drv_cc_b.core = core;
457 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
458 }
459
460 /* Init MIPS core */
461 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
462 if (core) {
463 bus->drv_mips.core = core;
464 bcma_core_mips_init(&bus->drv_mips);
465 }
466
467 /* Init PCIE core */
468 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
469 if (core) {
470 bus->drv_pci[0].core = core;
471 bcma_core_pci_init(&bus->drv_pci[0]);
472 }
473
474 /* Init PCIE core */
475 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
476 if (core) {
477 bus->drv_pci[1].core = core;
478 bcma_core_pci_init(&bus->drv_pci[1]);
479 }
480
481 /* Init PCIe Gen 2 core */
482 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
483 if (core) {
484 bus->drv_pcie2.core = core;
485 bcma_core_pcie2_init(&bus->drv_pcie2);
486 }
487
488 /* Init GBIT MAC COMMON core */
489 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
490 if (core) {
491 bus->drv_gmac_cmn.core = core;
492 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
493 }
494
495 /* Register found cores */
496 bcma_register_devices(bus);
497
498 bcma_info(bus, "Bus registered\n");
499
500 return 0;
501}
502
503void bcma_bus_unregister(struct bcma_bus *bus)
504{
505 int err;
506
507 err = bcma_gpio_unregister(&bus->drv_cc);
508 if (err == -EBUSY)
509 bcma_err(bus, "Some GPIOs are still in use.\n");
510 else if (err)
511 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
512
513 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
514
515 bcma_unregister_cores(bus);
516}
517
518/*
519 * This is a special version of bus registration function designed for SoCs.
520 * It scans bus and performs basic initialization of main cores only.
521 * Please note it requires memory allocation, however it won't try to sleep.
522 */
523int __init bcma_bus_early_register(struct bcma_bus *bus)
524{
525 int err;
526 struct bcma_device *core;
527
528 /* Scan for devices (cores) */
529 err = bcma_bus_scan(bus);
530 if (err) {
531 bcma_err(bus, "Failed to scan bus: %d\n", err);
532 return -1;
533 }
534
535 /* Early init CC core */
536 core = bcma_find_core(bus, bcma_cc_core_id(bus));
537 if (core) {
538 bus->drv_cc.core = core;
539 bcma_core_chipcommon_early_init(&bus->drv_cc);
540 }
541
542 /* Early init MIPS core */
543 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
544 if (core) {
545 bus->drv_mips.core = core;
546 bcma_core_mips_early_init(&bus->drv_mips);
547 }
548
549 bcma_info(bus, "Early bus registered\n");
550
551 return 0;
552}
553
554#ifdef CONFIG_PM
555int bcma_bus_suspend(struct bcma_bus *bus)
556{
557 struct bcma_device *core;
558
559 list_for_each_entry(core, &bus->cores, list) {
560 struct device_driver *drv = core->dev.driver;
561 if (drv) {
562 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
563 if (adrv->suspend)
564 adrv->suspend(core);
565 }
566 }
567 return 0;
568}
569
570int bcma_bus_resume(struct bcma_bus *bus)
571{
572 struct bcma_device *core;
573
574 /* Init CC core */
575 if (bus->drv_cc.core) {
576 bus->drv_cc.setup_done = false;
577 bcma_core_chipcommon_init(&bus->drv_cc);
578 }
579
580 list_for_each_entry(core, &bus->cores, list) {
581 struct device_driver *drv = core->dev.driver;
582 if (drv) {
583 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
584 if (adrv->resume)
585 adrv->resume(core);
586 }
587 }
588
589 return 0;
590}
591#endif
592
593int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
594{
595 drv->drv.name = drv->name;
596 drv->drv.bus = &bcma_bus_type;
597 drv->drv.owner = owner;
598
599 return driver_register(&drv->drv);
600}
601EXPORT_SYMBOL_GPL(__bcma_driver_register);
602
603void bcma_driver_unregister(struct bcma_driver *drv)
604{
605 driver_unregister(&drv->drv);
606}
607EXPORT_SYMBOL_GPL(bcma_driver_unregister);
608
609static int bcma_bus_match(struct device *dev, struct device_driver *drv)
610{
611 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
612 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
613 const struct bcma_device_id *cid = &core->id;
614 const struct bcma_device_id *did;
615
616 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
617 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
618 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
619 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
620 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
621 return 1;
622 }
623 return 0;
624}
625
626static int bcma_device_probe(struct device *dev)
627{
628 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
629 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
630 drv);
631 int err = 0;
632
633 get_device(dev);
634 if (adrv->probe)
635 err = adrv->probe(core);
636 if (err)
637 put_device(dev);
638
639 return err;
640}
641
642static int bcma_device_remove(struct device *dev)
643{
644 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
645 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
646 drv);
647
648 if (adrv->remove)
649 adrv->remove(core);
650 put_device(dev);
651
652 return 0;
653}
654
655static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
656{
657 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
658
659 return add_uevent_var(env,
660 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
661 core->id.manuf, core->id.id,
662 core->id.rev, core->id.class);
663}
664
665static unsigned int bcma_bus_registered;
666
667/*
668 * If built-in, bus has to be registered early, before any driver calls
669 * bcma_driver_register.
670 * Otherwise registering driver would trigger BUG in driver_register.
671 */
672static int __init bcma_init_bus_register(void)
673{
674 int err;
675
676 if (bcma_bus_registered)
677 return 0;
678
679 err = bus_register(&bcma_bus_type);
680 if (!err)
681 bcma_bus_registered = 1;
682
683 return err;
684}
685#ifndef MODULE
686fs_initcall(bcma_init_bus_register);
687#endif
688
689/* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
690static int __init bcma_modinit(void)
691{
692 int err;
693
694 err = bcma_init_bus_register();
695 if (err)
696 return err;
697
698 err = bcma_host_soc_register_driver();
699 if (err) {
700 pr_err("SoC host initialization failed\n");
701 err = 0;
702 }
703#ifdef CONFIG_BCMA_HOST_PCI
704 err = bcma_host_pci_init();
705 if (err) {
706 pr_err("PCI host initialization failed\n");
707 err = 0;
708 }
709#endif
710
711 return err;
712}
713module_init(bcma_modinit);
714
715static void __exit bcma_modexit(void)
716{
717#ifdef CONFIG_BCMA_HOST_PCI
718 bcma_host_pci_exit();
719#endif
720 bcma_host_soc_unregister_driver();
721 bus_unregister(&bcma_bus_type);
722}
723module_exit(bcma_modexit)