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8#include "bcma_private.h"
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/bcma/bcma.h>
12#include <linux/slab.h>
13#include <linux/of_address.h>
14
15MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
16MODULE_LICENSE("GPL");
17
18
19static unsigned int bcma_bus_next_num = 0;
20
21
22static DEFINE_MUTEX(bcma_buses_mutex);
23
24static int bcma_bus_match(struct device *dev, struct device_driver *drv);
25static int bcma_device_probe(struct device *dev);
26static int bcma_device_remove(struct device *dev);
27static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
28
29static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
30{
31 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
32 return sprintf(buf, "0x%03X\n", core->id.manuf);
33}
34static DEVICE_ATTR_RO(manuf);
35
36static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
37{
38 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
39 return sprintf(buf, "0x%03X\n", core->id.id);
40}
41static DEVICE_ATTR_RO(id);
42
43static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
44{
45 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
46 return sprintf(buf, "0x%02X\n", core->id.rev);
47}
48static DEVICE_ATTR_RO(rev);
49
50static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
51{
52 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
53 return sprintf(buf, "0x%X\n", core->id.class);
54}
55static DEVICE_ATTR_RO(class);
56
57static struct attribute *bcma_device_attrs[] = {
58 &dev_attr_manuf.attr,
59 &dev_attr_id.attr,
60 &dev_attr_rev.attr,
61 &dev_attr_class.attr,
62 NULL,
63};
64ATTRIBUTE_GROUPS(bcma_device);
65
66static struct bus_type bcma_bus_type = {
67 .name = "bcma",
68 .match = bcma_bus_match,
69 .probe = bcma_device_probe,
70 .remove = bcma_device_remove,
71 .uevent = bcma_device_uevent,
72 .dev_groups = bcma_device_groups,
73};
74
75static u16 bcma_cc_core_id(struct bcma_bus *bus)
76{
77 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
78 return BCMA_CORE_4706_CHIPCOMMON;
79 return BCMA_CORE_CHIPCOMMON;
80}
81
82struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
83 u8 unit)
84{
85 struct bcma_device *core;
86
87 list_for_each_entry(core, &bus->cores, list) {
88 if (core->id.id == coreid && core->core_unit == unit)
89 return core;
90 }
91 return NULL;
92}
93EXPORT_SYMBOL_GPL(bcma_find_core_unit);
94
95bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
96 int timeout)
97{
98 unsigned long deadline = jiffies + timeout;
99 u32 val;
100
101 do {
102 val = bcma_read32(core, reg);
103 if ((val & mask) == value)
104 return true;
105 cpu_relax();
106 udelay(10);
107 } while (!time_after_eq(jiffies, deadline));
108
109 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
110
111 return false;
112}
113
114static void bcma_release_core_dev(struct device *dev)
115{
116 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
117 if (core->io_addr)
118 iounmap(core->io_addr);
119 if (core->io_wrap)
120 iounmap(core->io_wrap);
121 kfree(core);
122}
123
124static bool bcma_is_core_needed_early(u16 core_id)
125{
126 switch (core_id) {
127 case BCMA_CORE_NS_NAND:
128 case BCMA_CORE_NS_QSPI:
129 return true;
130 }
131
132 return false;
133}
134
135#if defined(CONFIG_OF) && defined(CONFIG_OF_ADDRESS)
136static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
137 struct bcma_device *core)
138{
139 struct device_node *node;
140 u64 size;
141 const __be32 *reg;
142
143 if (!parent || !parent->dev.of_node)
144 return NULL;
145
146 for_each_child_of_node(parent->dev.of_node, node) {
147 reg = of_get_address(node, 0, &size, NULL);
148 if (!reg)
149 continue;
150 if (of_translate_address(node, reg) == core->addr)
151 return node;
152 }
153 return NULL;
154}
155
156static void bcma_of_fill_device(struct platform_device *parent,
157 struct bcma_device *core)
158{
159 struct device_node *node;
160
161 node = bcma_of_find_child_device(parent, core);
162 if (node)
163 core->dev.of_node = node;
164}
165#else
166static void bcma_of_fill_device(struct platform_device *parent,
167 struct bcma_device *core)
168{
169}
170#endif
171
172static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
173{
174 int err;
175
176 core->dev.release = bcma_release_core_dev;
177 core->dev.bus = &bcma_bus_type;
178 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
179
180 switch (bus->hosttype) {
181 case BCMA_HOSTTYPE_PCI:
182 core->dev.parent = &bus->host_pci->dev;
183 core->dma_dev = &bus->host_pci->dev;
184 core->irq = bus->host_pci->irq;
185 break;
186 case BCMA_HOSTTYPE_SOC:
187 core->dev.dma_mask = &core->dev.coherent_dma_mask;
188 if (bus->host_pdev) {
189 core->dma_dev = &bus->host_pdev->dev;
190 core->dev.parent = &bus->host_pdev->dev;
191 bcma_of_fill_device(bus->host_pdev, core);
192 } else {
193 core->dma_dev = &core->dev;
194 }
195 break;
196 case BCMA_HOSTTYPE_SDIO:
197 break;
198 }
199
200 err = device_register(&core->dev);
201 if (err) {
202 bcma_err(bus, "Could not register dev for core 0x%03X\n",
203 core->id.id);
204 put_device(&core->dev);
205 return;
206 }
207 core->dev_registered = true;
208}
209
210static int bcma_register_devices(struct bcma_bus *bus)
211{
212 struct bcma_device *core;
213 int err;
214
215 list_for_each_entry(core, &bus->cores, list) {
216
217 switch (core->id.id) {
218 case BCMA_CORE_4706_CHIPCOMMON:
219 case BCMA_CORE_CHIPCOMMON:
220 case BCMA_CORE_NS_CHIPCOMMON_B:
221 case BCMA_CORE_PCI:
222 case BCMA_CORE_PCIE:
223 case BCMA_CORE_PCIE2:
224 case BCMA_CORE_MIPS_74K:
225 case BCMA_CORE_4706_MAC_GBIT_COMMON:
226 continue;
227 }
228
229
230 if (bcma_is_core_needed_early(core->id.id))
231 continue;
232
233
234 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
235 core->core_unit > 0)
236 continue;
237
238 bcma_register_core(bus, core);
239 }
240
241#ifdef CONFIG_BCMA_DRIVER_MIPS
242 if (bus->drv_cc.pflash.present) {
243 err = platform_device_register(&bcma_pflash_dev);
244 if (err)
245 bcma_err(bus, "Error registering parallel flash\n");
246 }
247#endif
248
249#ifdef CONFIG_BCMA_SFLASH
250 if (bus->drv_cc.sflash.present) {
251 err = platform_device_register(&bcma_sflash_dev);
252 if (err)
253 bcma_err(bus, "Error registering serial flash\n");
254 }
255#endif
256
257#ifdef CONFIG_BCMA_NFLASH
258 if (bus->drv_cc.nflash.present) {
259 err = platform_device_register(&bcma_nflash_dev);
260 if (err)
261 bcma_err(bus, "Error registering NAND flash\n");
262 }
263#endif
264 err = bcma_gpio_init(&bus->drv_cc);
265 if (err == -ENOTSUPP)
266 bcma_debug(bus, "GPIO driver not activated\n");
267 else if (err)
268 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
269
270 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
271 err = bcma_chipco_watchdog_register(&bus->drv_cc);
272 if (err)
273 bcma_err(bus, "Error registering watchdog driver\n");
274 }
275
276 return 0;
277}
278
279static void bcma_unregister_cores(struct bcma_bus *bus)
280{
281 struct bcma_device *core, *tmp;
282
283 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
284 list_del(&core->list);
285 if (core->dev_registered)
286 device_unregister(&core->dev);
287 }
288 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
289 platform_device_unregister(bus->drv_cc.watchdog);
290}
291
292int bcma_bus_register(struct bcma_bus *bus)
293{
294 int err;
295 struct bcma_device *core;
296
297 mutex_lock(&bcma_buses_mutex);
298 bus->num = bcma_bus_next_num++;
299 mutex_unlock(&bcma_buses_mutex);
300
301
302 err = bcma_bus_scan(bus);
303 if (err) {
304 bcma_err(bus, "Failed to scan: %d\n", err);
305 return err;
306 }
307
308
309 core = bcma_find_core(bus, bcma_cc_core_id(bus));
310 if (core) {
311 bus->drv_cc.core = core;
312 bcma_core_chipcommon_early_init(&bus->drv_cc);
313 }
314
315
316 list_for_each_entry(core, &bus->cores, list) {
317 if (bcma_is_core_needed_early(core->id.id))
318 bcma_register_core(bus, core);
319 }
320
321
322 err = bcma_sprom_get(bus);
323 if (err == -ENOENT) {
324 bcma_err(bus, "No SPROM available\n");
325 } else if (err)
326 bcma_err(bus, "Failed to get SPROM: %d\n", err);
327
328
329 core = bcma_find_core(bus, bcma_cc_core_id(bus));
330 if (core) {
331 bus->drv_cc.core = core;
332 bcma_core_chipcommon_init(&bus->drv_cc);
333 }
334
335
336 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
337 if (core) {
338 bus->drv_cc_b.core = core;
339 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
340 }
341
342
343 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
344 if (core) {
345 bus->drv_mips.core = core;
346 bcma_core_mips_init(&bus->drv_mips);
347 }
348
349
350 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
351 if (core) {
352 bus->drv_pci[0].core = core;
353 bcma_core_pci_init(&bus->drv_pci[0]);
354 }
355
356
357 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
358 if (core) {
359 bus->drv_pci[1].core = core;
360 bcma_core_pci_init(&bus->drv_pci[1]);
361 }
362
363
364 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
365 if (core) {
366 bus->drv_pcie2.core = core;
367 bcma_core_pcie2_init(&bus->drv_pcie2);
368 }
369
370
371 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
372 if (core) {
373 bus->drv_gmac_cmn.core = core;
374 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
375 }
376
377
378 bcma_register_devices(bus);
379
380 bcma_info(bus, "Bus registered\n");
381
382 return 0;
383}
384
385void bcma_bus_unregister(struct bcma_bus *bus)
386{
387 struct bcma_device *cores[3];
388 int err;
389
390 err = bcma_gpio_unregister(&bus->drv_cc);
391 if (err == -EBUSY)
392 bcma_err(bus, "Some GPIOs are still in use.\n");
393 else if (err)
394 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
395
396 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
397
398 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
399 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
400 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
401
402 bcma_unregister_cores(bus);
403
404 kfree(cores[2]);
405 kfree(cores[1]);
406 kfree(cores[0]);
407}
408
409int __init bcma_bus_early_register(struct bcma_bus *bus,
410 struct bcma_device *core_cc,
411 struct bcma_device *core_mips)
412{
413 int err;
414 struct bcma_device *core;
415 struct bcma_device_id match;
416
417 match.manuf = BCMA_MANUF_BCM;
418 match.id = bcma_cc_core_id(bus);
419 match.class = BCMA_CL_SIM;
420 match.rev = BCMA_ANY_REV;
421
422
423 err = bcma_bus_scan_early(bus, &match, core_cc);
424 if (err) {
425 bcma_err(bus, "Failed to scan for common core: %d\n", err);
426 return -1;
427 }
428
429 match.manuf = BCMA_MANUF_MIPS;
430 match.id = BCMA_CORE_MIPS_74K;
431 match.class = BCMA_CL_SIM;
432 match.rev = BCMA_ANY_REV;
433
434
435 err = bcma_bus_scan_early(bus, &match, core_mips);
436 if (err) {
437 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
438 return -1;
439 }
440
441
442 core = bcma_find_core(bus, bcma_cc_core_id(bus));
443 if (core) {
444 bus->drv_cc.core = core;
445 bcma_core_chipcommon_early_init(&bus->drv_cc);
446 }
447
448
449 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
450 if (core) {
451 bus->drv_mips.core = core;
452 bcma_core_mips_early_init(&bus->drv_mips);
453 }
454
455 bcma_info(bus, "Early bus registered\n");
456
457 return 0;
458}
459
460#ifdef CONFIG_PM
461int bcma_bus_suspend(struct bcma_bus *bus)
462{
463 struct bcma_device *core;
464
465 list_for_each_entry(core, &bus->cores, list) {
466 struct device_driver *drv = core->dev.driver;
467 if (drv) {
468 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
469 if (adrv->suspend)
470 adrv->suspend(core);
471 }
472 }
473 return 0;
474}
475
476int bcma_bus_resume(struct bcma_bus *bus)
477{
478 struct bcma_device *core;
479
480
481 if (bus->drv_cc.core) {
482 bus->drv_cc.setup_done = false;
483 bcma_core_chipcommon_init(&bus->drv_cc);
484 }
485
486 list_for_each_entry(core, &bus->cores, list) {
487 struct device_driver *drv = core->dev.driver;
488 if (drv) {
489 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
490 if (adrv->resume)
491 adrv->resume(core);
492 }
493 }
494
495 return 0;
496}
497#endif
498
499int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
500{
501 drv->drv.name = drv->name;
502 drv->drv.bus = &bcma_bus_type;
503 drv->drv.owner = owner;
504
505 return driver_register(&drv->drv);
506}
507EXPORT_SYMBOL_GPL(__bcma_driver_register);
508
509void bcma_driver_unregister(struct bcma_driver *drv)
510{
511 driver_unregister(&drv->drv);
512}
513EXPORT_SYMBOL_GPL(bcma_driver_unregister);
514
515static int bcma_bus_match(struct device *dev, struct device_driver *drv)
516{
517 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
518 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
519 const struct bcma_device_id *cid = &core->id;
520 const struct bcma_device_id *did;
521
522 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
523 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
524 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
525 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
526 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
527 return 1;
528 }
529 return 0;
530}
531
532static int bcma_device_probe(struct device *dev)
533{
534 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
535 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
536 drv);
537 int err = 0;
538
539 if (adrv->probe)
540 err = adrv->probe(core);
541
542 return err;
543}
544
545static int bcma_device_remove(struct device *dev)
546{
547 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
548 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
549 drv);
550
551 if (adrv->remove)
552 adrv->remove(core);
553
554 return 0;
555}
556
557static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
558{
559 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
560
561 return add_uevent_var(env,
562 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
563 core->id.manuf, core->id.id,
564 core->id.rev, core->id.class);
565}
566
567static int __init bcma_modinit(void)
568{
569 int err;
570
571 err = bus_register(&bcma_bus_type);
572 if (err)
573 return err;
574
575 err = bcma_host_soc_register_driver();
576 if (err) {
577 pr_err("SoC host initialization failed\n");
578 err = 0;
579 }
580#ifdef CONFIG_BCMA_HOST_PCI
581 err = bcma_host_pci_init();
582 if (err) {
583 pr_err("PCI host initialization failed\n");
584 err = 0;
585 }
586#endif
587
588 return err;
589}
590fs_initcall(bcma_modinit);
591
592static void __exit bcma_modexit(void)
593{
594#ifdef CONFIG_BCMA_HOST_PCI
595 bcma_host_pci_exit();
596#endif
597 bcma_host_soc_unregister_driver();
598 bus_unregister(&bcma_bus_type);
599}
600module_exit(bcma_modexit)
601
