2 * Broadcom specific AMBA
5 * Licensed under the GNU/GPL. See COPYING for details.
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>
14 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
15 MODULE_LICENSE("GPL");
17 /* contains the number the next bus should get. */
18 static unsigned int bcma_bus_next_num = 0;
20 /* bcma_buses_mutex locks the bcma_bus_next_num */
21 static DEFINE_MUTEX(bcma_buses_mutex);
23 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
24 static int bcma_device_probe(struct device *dev);
25 static int bcma_device_remove(struct device *dev);
26 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
28 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
30 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
31 return sprintf(buf, "0x%03X\n", core->id.manuf);
33 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
35 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
36 return sprintf(buf, "0x%03X\n", core->id.id);
38 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
40 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
41 return sprintf(buf, "0x%02X\n", core->id.rev);
43 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
45 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
46 return sprintf(buf, "0x%X\n", core->id.class);
48 static struct device_attribute bcma_device_attrs[] = {
56 static struct bus_type bcma_bus_type = {
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,
65 static u16 bcma_cc_core_id(struct bcma_bus *bus)
67 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
68 return BCMA_CORE_4706_CHIPCOMMON;
69 return BCMA_CORE_CHIPCOMMON;
72 struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
74 struct bcma_device *core;
76 list_for_each_entry(core, &bus->cores, list) {
77 if (core->id.id == coreid)
82 EXPORT_SYMBOL_GPL(bcma_find_core);
84 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
87 struct bcma_device *core;
89 list_for_each_entry(core, &bus->cores, list) {
90 if (core->id.id == coreid && core->core_unit == unit)
96 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
99 unsigned long deadline = jiffies + timeout;
103 val = bcma_read32(core, reg);
104 if ((val & mask) == value)
108 } while (!time_after_eq(jiffies, deadline));
110 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
115 static void bcma_release_core_dev(struct device *dev)
117 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
119 iounmap(core->io_addr);
121 iounmap(core->io_wrap);
125 static int bcma_register_cores(struct bcma_bus *bus)
127 struct bcma_device *core;
130 list_for_each_entry(core, &bus->cores, list) {
131 /* We support that cores ourself */
132 switch (core->id.id) {
133 case BCMA_CORE_4706_CHIPCOMMON:
134 case BCMA_CORE_CHIPCOMMON:
137 case BCMA_CORE_MIPS_74K:
138 case BCMA_CORE_4706_MAC_GBIT_COMMON:
142 /* Only first GMAC core on BCM4706 is connected and working */
143 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
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);
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;
157 case BCMA_HOSTTYPE_SOC:
158 core->dev.dma_mask = &core->dev.coherent_dma_mask;
159 core->dma_dev = &core->dev;
161 case BCMA_HOSTTYPE_SDIO:
165 err = device_register(&core->dev);
168 "Could not register dev for core 0x%03X\n",
172 core->dev_registered = true;
176 #ifdef CONFIG_BCMA_DRIVER_MIPS
177 if (bus->drv_cc.pflash.present) {
178 err = platform_device_register(&bcma_pflash_dev);
180 bcma_err(bus, "Error registering parallel flash\n");
184 #ifdef CONFIG_BCMA_SFLASH
185 if (bus->drv_cc.sflash.present) {
186 err = platform_device_register(&bcma_sflash_dev);
188 bcma_err(bus, "Error registering serial flash\n");
192 #ifdef CONFIG_BCMA_NFLASH
193 if (bus->drv_cc.nflash.present) {
194 err = platform_device_register(&bcma_nflash_dev);
196 bcma_err(bus, "Error registering NAND flash\n");
199 err = bcma_gpio_init(&bus->drv_cc);
200 if (err == -ENOTSUPP)
201 bcma_debug(bus, "GPIO driver not activated\n");
203 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
205 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
206 err = bcma_chipco_watchdog_register(&bus->drv_cc);
208 bcma_err(bus, "Error registering watchdog driver\n");
214 static void bcma_unregister_cores(struct bcma_bus *bus)
216 struct bcma_device *core, *tmp;
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);
223 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
224 platform_device_unregister(bus->drv_cc.watchdog);
227 int bcma_bus_register(struct bcma_bus *bus)
230 struct bcma_device *core;
232 mutex_lock(&bcma_buses_mutex);
233 bus->num = bcma_bus_next_num++;
234 mutex_unlock(&bcma_buses_mutex);
236 /* Scan for devices (cores) */
237 err = bcma_bus_scan(bus);
239 bcma_err(bus, "Failed to scan: %d\n", err);
243 /* Early init CC core */
244 core = bcma_find_core(bus, bcma_cc_core_id(bus));
246 bus->drv_cc.core = core;
247 bcma_core_chipcommon_early_init(&bus->drv_cc);
250 /* Try to get SPROM */
251 err = bcma_sprom_get(bus);
252 if (err == -ENOENT) {
253 bcma_err(bus, "No SPROM available\n");
255 bcma_err(bus, "Failed to get SPROM: %d\n", err);
258 core = bcma_find_core(bus, bcma_cc_core_id(bus));
260 bus->drv_cc.core = core;
261 bcma_core_chipcommon_init(&bus->drv_cc);
265 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
267 bus->drv_mips.core = core;
268 bcma_core_mips_init(&bus->drv_mips);
272 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
274 bus->drv_pci[0].core = core;
275 bcma_core_pci_init(&bus->drv_pci[0]);
279 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
281 bus->drv_pci[1].core = core;
282 bcma_core_pci_init(&bus->drv_pci[1]);
285 /* Init GBIT MAC COMMON core */
286 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
288 bus->drv_gmac_cmn.core = core;
289 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
292 /* Register found cores */
293 bcma_register_cores(bus);
295 bcma_info(bus, "Bus registered\n");
300 void bcma_bus_unregister(struct bcma_bus *bus)
302 struct bcma_device *cores[3];
305 err = bcma_gpio_unregister(&bus->drv_cc);
307 bcma_err(bus, "Some GPIOs are still in use.\n");
309 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
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);
315 bcma_unregister_cores(bus);
322 int __init bcma_bus_early_register(struct bcma_bus *bus,
323 struct bcma_device *core_cc,
324 struct bcma_device *core_mips)
327 struct bcma_device *core;
328 struct bcma_device_id match;
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;
337 /* Scan for chip common core */
338 err = bcma_bus_scan_early(bus, &match, core_cc);
340 bcma_err(bus, "Failed to scan for common core: %d\n", err);
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;
349 /* Scan for mips core */
350 err = bcma_bus_scan_early(bus, &match, core_mips);
352 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
356 /* Early init CC core */
357 core = bcma_find_core(bus, bcma_cc_core_id(bus));
359 bus->drv_cc.core = core;
360 bcma_core_chipcommon_early_init(&bus->drv_cc);
363 /* Early init MIPS core */
364 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
366 bus->drv_mips.core = core;
367 bcma_core_mips_early_init(&bus->drv_mips);
370 bcma_info(bus, "Early bus registered\n");
376 int bcma_bus_suspend(struct bcma_bus *bus)
378 struct bcma_device *core;
380 list_for_each_entry(core, &bus->cores, list) {
381 struct device_driver *drv = core->dev.driver;
383 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
391 int bcma_bus_resume(struct bcma_bus *bus)
393 struct bcma_device *core;
396 if (bus->drv_cc.core) {
397 bus->drv_cc.setup_done = false;
398 bcma_core_chipcommon_init(&bus->drv_cc);
401 list_for_each_entry(core, &bus->cores, list) {
402 struct device_driver *drv = core->dev.driver;
404 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
414 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
416 drv->drv.name = drv->name;
417 drv->drv.bus = &bcma_bus_type;
418 drv->drv.owner = owner;
420 return driver_register(&drv->drv);
422 EXPORT_SYMBOL_GPL(__bcma_driver_register);
424 void bcma_driver_unregister(struct bcma_driver *drv)
426 driver_unregister(&drv->drv);
428 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
430 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
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;
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))
447 static int bcma_device_probe(struct device *dev)
449 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
450 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
455 err = adrv->probe(core);
460 static int bcma_device_remove(struct device *dev)
462 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
463 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
472 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
474 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
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);
482 static int __init bcma_modinit(void)
486 err = bus_register(&bcma_bus_type);
490 #ifdef CONFIG_BCMA_HOST_PCI
491 err = bcma_host_pci_init();
493 pr_err("PCI host initialization failed\n");
500 fs_initcall(bcma_modinit);
502 static void __exit bcma_modexit(void)
504 #ifdef CONFIG_BCMA_HOST_PCI
505 bcma_host_pci_exit();
507 bus_unregister(&bcma_bus_type);
509 module_exit(bcma_modexit)