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