bcma: add methods for watchdog driver
[deliverable/linux.git] / drivers / bcma / main.c
CommitLineData
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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"
200351c7 9#include <linux/module.h>
d57ef3a6 10#include <linux/platform_device.h>
8369ae33 11#include <linux/bcma/bcma.h>
eef72699 12#include <linux/slab.h>
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13
14MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
15MODULE_LICENSE("GPL");
16
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17/* contains the number the next bus should get. */
18static unsigned int bcma_bus_next_num = 0;
19
20/* bcma_buses_mutex locks the bcma_bus_next_num */
21static DEFINE_MUTEX(bcma_buses_mutex);
22
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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);
886b66ef 26static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
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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,
886b66ef 61 .uevent = bcma_device_uevent,
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62 .dev_attrs = bcma_device_attrs,
63};
64
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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
1c9351cf 72struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
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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}
1c9351cf 82EXPORT_SYMBOL_GPL(bcma_find_core);
8369ae33 83
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84static struct 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
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96static void bcma_release_core_dev(struct device *dev)
97{
98 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
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99 if (core->io_addr)
100 iounmap(core->io_addr);
101 if (core->io_wrap)
102 iounmap(core->io_wrap);
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103 kfree(core);
104}
105
106static int bcma_register_cores(struct bcma_bus *bus)
107{
108 struct bcma_device *core;
109 int err, dev_id = 0;
110
111 list_for_each_entry(core, &bus->cores, list) {
112 /* We support that cores ourself */
113 switch (core->id.id) {
6d5cfc9f 114 case BCMA_CORE_4706_CHIPCOMMON:
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115 case BCMA_CORE_CHIPCOMMON:
116 case BCMA_CORE_PCI:
117 case BCMA_CORE_PCIE:
21e0534a 118 case BCMA_CORE_MIPS_74K:
e1ac4b40 119 case BCMA_CORE_4706_MAC_GBIT_COMMON:
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120 continue;
121 }
122
123 core->dev.release = bcma_release_core_dev;
124 core->dev.bus = &bcma_bus_type;
8f9ada4f 125 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);
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126
127 switch (bus->hosttype) {
128 case BCMA_HOSTTYPE_PCI:
129 core->dev.parent = &bus->host_pci->dev;
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130 core->dma_dev = &bus->host_pci->dev;
131 core->irq = bus->host_pci->irq;
8369ae33 132 break;
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133 case BCMA_HOSTTYPE_SOC:
134 core->dev.dma_mask = &core->dev.coherent_dma_mask;
135 core->dma_dev = &core->dev;
136 break;
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137 case BCMA_HOSTTYPE_SDIO:
138 break;
139 }
140
141 err = device_register(&core->dev);
142 if (err) {
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143 bcma_err(bus,
144 "Could not register dev for core 0x%03X\n",
145 core->id.id);
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146 continue;
147 }
148 core->dev_registered = true;
149 dev_id++;
150 }
151
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152#ifdef CONFIG_BCMA_SFLASH
153 if (bus->drv_cc.sflash.present) {
154 err = platform_device_register(&bcma_sflash_dev);
155 if (err)
156 bcma_err(bus, "Error registering serial flash\n");
157 }
158#endif
159
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160#ifdef CONFIG_BCMA_NFLASH
161 if (bus->drv_cc.nflash.present) {
162 err = platform_device_register(&bcma_nflash_dev);
163 if (err)
164 bcma_err(bus, "Error registering NAND flash\n");
165 }
166#endif
167
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168 return 0;
169}
170
171static void bcma_unregister_cores(struct bcma_bus *bus)
172{
1fffa905 173 struct bcma_device *core, *tmp;
8369ae33 174
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175 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
176 list_del(&core->list);
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177 if (core->dev_registered)
178 device_unregister(&core->dev);
179 }
180}
181
d1a7a8e1 182int __devinit bcma_bus_register(struct bcma_bus *bus)
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183{
184 int err;
185 struct bcma_device *core;
186
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187 mutex_lock(&bcma_buses_mutex);
188 bus->num = bcma_bus_next_num++;
189 mutex_unlock(&bcma_buses_mutex);
190
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191 /* Scan for devices (cores) */
192 err = bcma_bus_scan(bus);
193 if (err) {
3d9d8af3 194 bcma_err(bus, "Failed to scan: %d\n", err);
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195 return -1;
196 }
197
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198 /* Early init CC core */
199 core = bcma_find_core(bus, bcma_cc_core_id(bus));
200 if (core) {
201 bus->drv_cc.core = core;
202 bcma_core_chipcommon_early_init(&bus->drv_cc);
203 }
204
205 /* Try to get SPROM */
206 err = bcma_sprom_get(bus);
207 if (err == -ENOENT) {
208 bcma_err(bus, "No SPROM available\n");
209 } else if (err)
210 bcma_err(bus, "Failed to get SPROM: %d\n", err);
211
8369ae33 212 /* Init CC core */
6d5cfc9f 213 core = bcma_find_core(bus, bcma_cc_core_id(bus));
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214 if (core) {
215 bus->drv_cc.core = core;
216 bcma_core_chipcommon_init(&bus->drv_cc);
217 }
218
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219 /* Init MIPS core */
220 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
221 if (core) {
222 bus->drv_mips.core = core;
223 bcma_core_mips_init(&bus->drv_mips);
224 }
225
8369ae33 226 /* Init PCIE core */
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227 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
228 if (core) {
229 bus->drv_pci[0].core = core;
230 bcma_core_pci_init(&bus->drv_pci[0]);
231 }
232
233 /* Init PCIE core */
234 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
8369ae33 235 if (core) {
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236 bus->drv_pci[1].core = core;
237 bcma_core_pci_init(&bus->drv_pci[1]);
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238 }
239
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240 /* Init GBIT MAC COMMON core */
241 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
242 if (core) {
243 bus->drv_gmac_cmn.core = core;
244 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
245 }
246
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247 /* Register found cores */
248 bcma_register_cores(bus);
249
3d9d8af3 250 bcma_info(bus, "Bus registered\n");
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251
252 return 0;
253}
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254
255void bcma_bus_unregister(struct bcma_bus *bus)
256{
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257 struct bcma_device *cores[3];
258
259 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
260 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
261 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
262
8369ae33 263 bcma_unregister_cores(bus);
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264
265 kfree(cores[2]);
266 kfree(cores[1]);
267 kfree(cores[0]);
8369ae33 268}
8369ae33 269
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270int __init bcma_bus_early_register(struct bcma_bus *bus,
271 struct bcma_device *core_cc,
272 struct bcma_device *core_mips)
273{
274 int err;
275 struct bcma_device *core;
276 struct bcma_device_id match;
277
278 bcma_init_bus(bus);
279
280 match.manuf = BCMA_MANUF_BCM;
6d5cfc9f 281 match.id = bcma_cc_core_id(bus);
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282 match.class = BCMA_CL_SIM;
283 match.rev = BCMA_ANY_REV;
284
285 /* Scan for chip common core */
286 err = bcma_bus_scan_early(bus, &match, core_cc);
287 if (err) {
3d9d8af3 288 bcma_err(bus, "Failed to scan for common core: %d\n", err);
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289 return -1;
290 }
291
292 match.manuf = BCMA_MANUF_MIPS;
293 match.id = BCMA_CORE_MIPS_74K;
294 match.class = BCMA_CL_SIM;
295 match.rev = BCMA_ANY_REV;
296
297 /* Scan for mips core */
298 err = bcma_bus_scan_early(bus, &match, core_mips);
299 if (err) {
3d9d8af3 300 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
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301 return -1;
302 }
303
49655bb8 304 /* Early init CC core */
6d5cfc9f 305 core = bcma_find_core(bus, bcma_cc_core_id(bus));
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306 if (core) {
307 bus->drv_cc.core = core;
49655bb8 308 bcma_core_chipcommon_early_init(&bus->drv_cc);
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309 }
310
49655bb8 311 /* Early init MIPS core */
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312 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
313 if (core) {
314 bus->drv_mips.core = core;
49655bb8 315 bcma_core_mips_early_init(&bus->drv_mips);
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316 }
317
3d9d8af3 318 bcma_info(bus, "Early bus registered\n");
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319
320 return 0;
321}
322
775ab521 323#ifdef CONFIG_PM
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324int bcma_bus_suspend(struct bcma_bus *bus)
325{
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326 struct bcma_device *core;
327
328 list_for_each_entry(core, &bus->cores, list) {
329 struct device_driver *drv = core->dev.driver;
330 if (drv) {
331 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
332 if (adrv->suspend)
333 adrv->suspend(core);
334 }
335 }
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336 return 0;
337}
338
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339int bcma_bus_resume(struct bcma_bus *bus)
340{
341 struct bcma_device *core;
342
343 /* Init CC core */
6d5cfc9f 344 if (bus->drv_cc.core) {
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345 bus->drv_cc.setup_done = false;
346 bcma_core_chipcommon_init(&bus->drv_cc);
347 }
348
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349 list_for_each_entry(core, &bus->cores, list) {
350 struct device_driver *drv = core->dev.driver;
351 if (drv) {
352 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
353 if (adrv->resume)
354 adrv->resume(core);
355 }
356 }
357
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358 return 0;
359}
360#endif
361
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362int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
363{
364 drv->drv.name = drv->name;
365 drv->drv.bus = &bcma_bus_type;
366 drv->drv.owner = owner;
367
368 return driver_register(&drv->drv);
369}
370EXPORT_SYMBOL_GPL(__bcma_driver_register);
371
372void bcma_driver_unregister(struct bcma_driver *drv)
373{
374 driver_unregister(&drv->drv);
375}
376EXPORT_SYMBOL_GPL(bcma_driver_unregister);
377
378static int bcma_bus_match(struct device *dev, struct device_driver *drv)
379{
380 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
381 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
382 const struct bcma_device_id *cid = &core->id;
383 const struct bcma_device_id *did;
384
385 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
386 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
387 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
388 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
389 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
390 return 1;
391 }
392 return 0;
393}
394
395static int bcma_device_probe(struct device *dev)
396{
397 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
398 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
399 drv);
400 int err = 0;
401
402 if (adrv->probe)
403 err = adrv->probe(core);
404
405 return err;
406}
407
408static int bcma_device_remove(struct device *dev)
409{
410 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
411 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
412 drv);
413
414 if (adrv->remove)
415 adrv->remove(core);
416
417 return 0;
418}
419
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420static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
421{
422 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
423
424 return add_uevent_var(env,
425 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
426 core->id.manuf, core->id.id,
427 core->id.rev, core->id.class);
428}
429
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430static int __init bcma_modinit(void)
431{
432 int err;
433
434 err = bus_register(&bcma_bus_type);
435 if (err)
436 return err;
437
438#ifdef CONFIG_BCMA_HOST_PCI
439 err = bcma_host_pci_init();
440 if (err) {
441 pr_err("PCI host initialization failed\n");
442 err = 0;
443 }
444#endif
445
446 return err;
447}
448fs_initcall(bcma_modinit);
449
450static void __exit bcma_modexit(void)
451{
452#ifdef CONFIG_BCMA_HOST_PCI
453 bcma_host_pci_exit();
454#endif
455 bus_unregister(&bcma_bus_type);
456}
457module_exit(bcma_modexit)
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