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Rafał Miłecki8369ae32011-05-09 18:56:46 +02001/*
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"
Paul Gortmaker200351c2011-07-01 16:06:37 -04009#include <linux/module.h>
Rafał Miłeckid57ef3a2012-08-10 21:23:53 +020010#include <linux/platform_device.h>
Rafał Miłecki8369ae32011-05-09 18:56:46 +020011#include <linux/bcma/bcma.h>
Geert Uytterhoeveneef72692011-06-26 10:19:44 +020012#include <linux/slab.h>
Rafał Miłecki8369ae32011-05-09 18:56:46 +020013
14MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
15MODULE_LICENSE("GPL");
16
Hauke Mehrtens8f9ada42012-01-31 00:03:36 +010017/* 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
Rafał Miłecki8369ae32011-05-09 18:56:46 +020023static 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);
David Woodhouse886b66e2011-08-19 22:14:47 +020026static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020027
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,
David Woodhouse886b66e2011-08-19 22:14:47 +020061 .uevent = bcma_device_uevent,
Rafał Miłecki8369ae32011-05-09 18:56:46 +020062 .dev_attrs = bcma_device_attrs,
63};
64
Rafał Miłecki6d5cfc92012-07-10 23:45:49 +020065static 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
Hauke Mehrtens1c9351c2012-02-28 00:56:09 +010072struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
Rafał Miłecki8369ae32011-05-09 18:56:46 +020073{
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}
Hauke Mehrtens1c9351c2012-02-28 00:56:09 +010082EXPORT_SYMBOL_GPL(bcma_find_core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020083
Hauke Mehrtensdfae7142012-09-29 20:40:18 +020084static 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
Rafał Miłecki8369ae32011-05-09 18:56:46 +020096static void bcma_release_core_dev(struct device *dev)
97{
98 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
Hauke Mehrtensecd177c2011-07-23 01:20:08 +020099 if (core->io_addr)
100 iounmap(core->io_addr);
101 if (core->io_wrap)
102 iounmap(core->io_wrap);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200103 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) {
Rafał Miłecki6d5cfc92012-07-10 23:45:49 +0200114 case BCMA_CORE_4706_CHIPCOMMON:
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200115 case BCMA_CORE_CHIPCOMMON:
116 case BCMA_CORE_PCI:
117 case BCMA_CORE_PCIE:
Hauke Mehrtens21e05342011-07-23 01:20:09 +0200118 case BCMA_CORE_MIPS_74K:
Rafał Miłeckie1ac4b42012-07-11 09:23:43 +0200119 case BCMA_CORE_4706_MAC_GBIT_COMMON:
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200120 continue;
121 }
122
123 core->dev.release = bcma_release_core_dev;
124 core->dev.bus = &bcma_bus_type;
Hauke Mehrtens8f9ada42012-01-31 00:03:36 +0100125 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200126
127 switch (bus->hosttype) {
128 case BCMA_HOSTTYPE_PCI:
129 core->dev.parent = &bus->host_pci->dev;
Rafał Miłecki1bdcd092011-05-18 11:40:22 +0200130 core->dma_dev = &bus->host_pci->dev;
131 core->irq = bus->host_pci->irq;
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200132 break;
Hauke Mehrtensecd177c2011-07-23 01:20:08 +0200133 case BCMA_HOSTTYPE_SOC:
134 core->dev.dma_mask = &core->dev.coherent_dma_mask;
135 core->dma_dev = &core->dev;
136 break;
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200137 case BCMA_HOSTTYPE_SDIO:
138 break;
139 }
140
141 err = device_register(&core->dev);
142 if (err) {
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200143 bcma_err(bus,
144 "Could not register dev for core 0x%03X\n",
145 core->id.id);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200146 continue;
147 }
148 core->dev_registered = true;
149 dev_id++;
150 }
151
Rafał Miłeckid57ef3a2012-08-10 21:23:53 +0200152#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
Rafał Miłecki371a0042012-08-12 13:08:05 +0200160#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
Hauke Mehrtenscf0936b2012-11-20 22:24:30 +0000167 err = bcma_gpio_init(&bus->drv_cc);
168 if (err == -ENOTSUPP)
169 bcma_debug(bus, "GPIO driver not activated\n");
170 else if (err)
171 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
Rafał Miłecki371a0042012-08-12 13:08:05 +0200172
Hauke Mehrtensa4855f392012-12-05 18:46:02 +0100173 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
174 err = bcma_chipco_watchdog_register(&bus->drv_cc);
175 if (err)
176 bcma_err(bus, "Error registering watchdog driver\n");
177 }
178
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200179 return 0;
180}
181
182static void bcma_unregister_cores(struct bcma_bus *bus)
183{
Piotr Haber1fffa902012-10-11 14:05:15 +0200184 struct bcma_device *core, *tmp;
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200185
Piotr Haber1fffa902012-10-11 14:05:15 +0200186 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
187 list_del(&core->list);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200188 if (core->dev_registered)
189 device_unregister(&core->dev);
190 }
Hauke Mehrtensa4855f392012-12-05 18:46:02 +0100191 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
192 platform_device_unregister(bus->drv_cc.watchdog);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200193}
194
Greg Kroah-Hartman0f58a012012-12-21 15:12:59 -0800195int bcma_bus_register(struct bcma_bus *bus)
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200196{
197 int err;
198 struct bcma_device *core;
199
Hauke Mehrtens8f9ada42012-01-31 00:03:36 +0100200 mutex_lock(&bcma_buses_mutex);
201 bus->num = bcma_bus_next_num++;
202 mutex_unlock(&bcma_buses_mutex);
203
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200204 /* Scan for devices (cores) */
205 err = bcma_bus_scan(bus);
206 if (err) {
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200207 bcma_err(bus, "Failed to scan: %d\n", err);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200208 return -1;
209 }
210
Hauke Mehrtens30cfb022012-09-29 20:29:50 +0200211 /* Early init CC core */
212 core = bcma_find_core(bus, bcma_cc_core_id(bus));
213 if (core) {
214 bus->drv_cc.core = core;
215 bcma_core_chipcommon_early_init(&bus->drv_cc);
216 }
217
218 /* Try to get SPROM */
219 err = bcma_sprom_get(bus);
220 if (err == -ENOENT) {
221 bcma_err(bus, "No SPROM available\n");
222 } else if (err)
223 bcma_err(bus, "Failed to get SPROM: %d\n", err);
224
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200225 /* Init CC core */
Rafał Miłecki6d5cfc92012-07-10 23:45:49 +0200226 core = bcma_find_core(bus, bcma_cc_core_id(bus));
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200227 if (core) {
228 bus->drv_cc.core = core;
229 bcma_core_chipcommon_init(&bus->drv_cc);
230 }
231
Hauke Mehrtens21e05342011-07-23 01:20:09 +0200232 /* Init MIPS core */
233 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
234 if (core) {
235 bus->drv_mips.core = core;
236 bcma_core_mips_init(&bus->drv_mips);
237 }
238
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200239 /* Init PCIE core */
Hauke Mehrtensdfae7142012-09-29 20:40:18 +0200240 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200241 if (core) {
Hauke Mehrtensdfae7142012-09-29 20:40:18 +0200242 bus->drv_pci[0].core = core;
243 bcma_core_pci_init(&bus->drv_pci[0]);
244 }
245
246 /* Init PCIE core */
247 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
248 if (core) {
249 bus->drv_pci[1].core = core;
250 bcma_core_pci_init(&bus->drv_pci[1]);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200251 }
252
Rafał Miłeckie1ac4b42012-07-11 09:23:43 +0200253 /* Init GBIT MAC COMMON core */
254 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
255 if (core) {
256 bus->drv_gmac_cmn.core = core;
257 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
258 }
259
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200260 /* Register found cores */
261 bcma_register_cores(bus);
262
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200263 bcma_info(bus, "Bus registered\n");
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200264
265 return 0;
266}
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200267
268void bcma_bus_unregister(struct bcma_bus *bus)
269{
Saul St. Johnee915922012-08-16 15:42:30 -0500270 struct bcma_device *cores[3];
271
272 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
273 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
274 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
275
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200276 bcma_unregister_cores(bus);
Saul St. Johnee915922012-08-16 15:42:30 -0500277
278 kfree(cores[2]);
279 kfree(cores[1]);
280 kfree(cores[0]);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200281}
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200282
Hauke Mehrtens517f43e2011-07-23 01:20:07 +0200283int __init bcma_bus_early_register(struct bcma_bus *bus,
284 struct bcma_device *core_cc,
285 struct bcma_device *core_mips)
286{
287 int err;
288 struct bcma_device *core;
289 struct bcma_device_id match;
290
291 bcma_init_bus(bus);
292
293 match.manuf = BCMA_MANUF_BCM;
Rafał Miłecki6d5cfc92012-07-10 23:45:49 +0200294 match.id = bcma_cc_core_id(bus);
Hauke Mehrtens517f43e2011-07-23 01:20:07 +0200295 match.class = BCMA_CL_SIM;
296 match.rev = BCMA_ANY_REV;
297
298 /* Scan for chip common core */
299 err = bcma_bus_scan_early(bus, &match, core_cc);
300 if (err) {
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200301 bcma_err(bus, "Failed to scan for common core: %d\n", err);
Hauke Mehrtens517f43e2011-07-23 01:20:07 +0200302 return -1;
303 }
304
305 match.manuf = BCMA_MANUF_MIPS;
306 match.id = BCMA_CORE_MIPS_74K;
307 match.class = BCMA_CL_SIM;
308 match.rev = BCMA_ANY_REV;
309
310 /* Scan for mips core */
311 err = bcma_bus_scan_early(bus, &match, core_mips);
312 if (err) {
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200313 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
Hauke Mehrtens517f43e2011-07-23 01:20:07 +0200314 return -1;
315 }
316
Hauke Mehrtens49655bb2012-09-29 20:29:49 +0200317 /* Early init CC core */
Rafał Miłecki6d5cfc92012-07-10 23:45:49 +0200318 core = bcma_find_core(bus, bcma_cc_core_id(bus));
Hauke Mehrtens517f43e2011-07-23 01:20:07 +0200319 if (core) {
320 bus->drv_cc.core = core;
Hauke Mehrtens49655bb2012-09-29 20:29:49 +0200321 bcma_core_chipcommon_early_init(&bus->drv_cc);
Hauke Mehrtens517f43e2011-07-23 01:20:07 +0200322 }
323
Hauke Mehrtens49655bb2012-09-29 20:29:49 +0200324 /* Early init MIPS core */
Hauke Mehrtens21e05342011-07-23 01:20:09 +0200325 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
326 if (core) {
327 bus->drv_mips.core = core;
Hauke Mehrtens49655bb2012-09-29 20:29:49 +0200328 bcma_core_mips_early_init(&bus->drv_mips);
Hauke Mehrtens21e05342011-07-23 01:20:09 +0200329 }
330
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200331 bcma_info(bus, "Early bus registered\n");
Hauke Mehrtens517f43e2011-07-23 01:20:07 +0200332
333 return 0;
334}
335
Rafał Miłecki775ab522011-12-09 22:16:07 +0100336#ifdef CONFIG_PM
Linus Torvalds685a4ef2012-01-13 23:58:40 +0100337int bcma_bus_suspend(struct bcma_bus *bus)
338{
Linus Torvalds7d5869e2012-01-13 23:58:41 +0100339 struct bcma_device *core;
340
341 list_for_each_entry(core, &bus->cores, list) {
342 struct device_driver *drv = core->dev.driver;
343 if (drv) {
344 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
345 if (adrv->suspend)
346 adrv->suspend(core);
347 }
348 }
Linus Torvalds685a4ef2012-01-13 23:58:40 +0100349 return 0;
350}
351
Rafał Miłecki775ab522011-12-09 22:16:07 +0100352int bcma_bus_resume(struct bcma_bus *bus)
353{
354 struct bcma_device *core;
355
356 /* Init CC core */
Rafał Miłecki6d5cfc92012-07-10 23:45:49 +0200357 if (bus->drv_cc.core) {
Rafał Miłecki775ab522011-12-09 22:16:07 +0100358 bus->drv_cc.setup_done = false;
359 bcma_core_chipcommon_init(&bus->drv_cc);
360 }
361
Linus Torvalds7d5869e2012-01-13 23:58:41 +0100362 list_for_each_entry(core, &bus->cores, list) {
363 struct device_driver *drv = core->dev.driver;
364 if (drv) {
365 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
366 if (adrv->resume)
367 adrv->resume(core);
368 }
369 }
370
Rafał Miłecki775ab522011-12-09 22:16:07 +0100371 return 0;
372}
373#endif
374
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200375int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
376{
377 drv->drv.name = drv->name;
378 drv->drv.bus = &bcma_bus_type;
379 drv->drv.owner = owner;
380
381 return driver_register(&drv->drv);
382}
383EXPORT_SYMBOL_GPL(__bcma_driver_register);
384
385void bcma_driver_unregister(struct bcma_driver *drv)
386{
387 driver_unregister(&drv->drv);
388}
389EXPORT_SYMBOL_GPL(bcma_driver_unregister);
390
391static int bcma_bus_match(struct device *dev, struct device_driver *drv)
392{
393 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
394 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
395 const struct bcma_device_id *cid = &core->id;
396 const struct bcma_device_id *did;
397
398 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
399 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
400 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
401 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
402 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
403 return 1;
404 }
405 return 0;
406}
407
408static int bcma_device_probe(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 int err = 0;
414
415 if (adrv->probe)
416 err = adrv->probe(core);
417
418 return err;
419}
420
421static int bcma_device_remove(struct device *dev)
422{
423 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
424 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
425 drv);
426
427 if (adrv->remove)
428 adrv->remove(core);
429
430 return 0;
431}
432
David Woodhouse886b66e2011-08-19 22:14:47 +0200433static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
434{
435 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
436
437 return add_uevent_var(env,
438 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
439 core->id.manuf, core->id.id,
440 core->id.rev, core->id.class);
441}
442
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200443static int __init bcma_modinit(void)
444{
445 int err;
446
447 err = bus_register(&bcma_bus_type);
448 if (err)
449 return err;
450
451#ifdef CONFIG_BCMA_HOST_PCI
452 err = bcma_host_pci_init();
453 if (err) {
454 pr_err("PCI host initialization failed\n");
455 err = 0;
456 }
457#endif
458
459 return err;
460}
461fs_initcall(bcma_modinit);
462
463static void __exit bcma_modexit(void)
464{
465#ifdef CONFIG_BCMA_HOST_PCI
466 bcma_host_pci_exit();
467#endif
468 bus_unregister(&bcma_bus_type);
469}
470module_exit(bcma_modexit)