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