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 DEVICE_ATTR_RO(manuf);
35 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
37 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
38 return sprintf(buf, "0x%03X\n", core->id.id);
40 static DEVICE_ATTR_RO(id);
42 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
44 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
45 return sprintf(buf, "0x%02X\n", core->id.rev);
47 static DEVICE_ATTR_RO(rev);
49 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
51 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
52 return sprintf(buf, "0x%X\n", core->id.class);
54 static DEVICE_ATTR_RO(class);
56 static struct attribute *bcma_device_attrs[] = {
63 ATTRIBUTE_GROUPS(bcma_device);
65 static struct bus_type bcma_bus_type = {
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,
74 static u16 bcma_cc_core_id(struct bcma_bus *bus)
76 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
77 return BCMA_CORE_4706_CHIPCOMMON;
78 return BCMA_CORE_CHIPCOMMON;
81 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
84 struct bcma_device *core;
86 list_for_each_entry(core, &bus->cores, list) {
87 if (core->id.id == coreid && core->core_unit == unit)
92 EXPORT_SYMBOL_GPL(bcma_find_core_unit);
94 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
97 unsigned long deadline = jiffies + timeout;
101 val = bcma_read32(core, reg);
102 if ((val & mask) == value)
106 } while (!time_after_eq(jiffies, deadline));
108 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
113 static void bcma_release_core_dev(struct device *dev)
115 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
117 iounmap(core->io_addr);
119 iounmap(core->io_wrap);
123 static bool bcma_is_core_needed_early(u16 core_id)
126 case BCMA_CORE_NS_NAND:
127 case BCMA_CORE_NS_QSPI:
134 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
138 core->dev.release = bcma_release_core_dev;
139 core->dev.bus = &bcma_bus_type;
140 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
142 switch (bus->hosttype) {
143 case BCMA_HOSTTYPE_PCI:
144 core->dev.parent = &bus->host_pci->dev;
145 core->dma_dev = &bus->host_pci->dev;
146 core->irq = bus->host_pci->irq;
148 case BCMA_HOSTTYPE_SOC:
149 core->dev.dma_mask = &core->dev.coherent_dma_mask;
150 core->dma_dev = &core->dev;
152 case BCMA_HOSTTYPE_SDIO:
156 err = device_register(&core->dev);
158 bcma_err(bus, "Could not register dev for core 0x%03X\n",
160 put_device(&core->dev);
163 core->dev_registered = true;
166 static int bcma_register_devices(struct bcma_bus *bus)
168 struct bcma_device *core;
171 list_for_each_entry(core, &bus->cores, list) {
172 /* We support that cores ourself */
173 switch (core->id.id) {
174 case BCMA_CORE_4706_CHIPCOMMON:
175 case BCMA_CORE_CHIPCOMMON:
176 case BCMA_CORE_NS_CHIPCOMMON_B:
179 case BCMA_CORE_PCIE2:
180 case BCMA_CORE_MIPS_74K:
181 case BCMA_CORE_4706_MAC_GBIT_COMMON:
185 /* Early cores were already registered */
186 if (bcma_is_core_needed_early(core->id.id))
189 /* Only first GMAC core on BCM4706 is connected and working */
190 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
194 bcma_register_core(bus, core);
197 #ifdef CONFIG_BCMA_DRIVER_MIPS
198 if (bus->drv_cc.pflash.present) {
199 err = platform_device_register(&bcma_pflash_dev);
201 bcma_err(bus, "Error registering parallel flash\n");
205 #ifdef CONFIG_BCMA_SFLASH
206 if (bus->drv_cc.sflash.present) {
207 err = platform_device_register(&bcma_sflash_dev);
209 bcma_err(bus, "Error registering serial flash\n");
213 #ifdef CONFIG_BCMA_NFLASH
214 if (bus->drv_cc.nflash.present) {
215 err = platform_device_register(&bcma_nflash_dev);
217 bcma_err(bus, "Error registering NAND flash\n");
220 err = bcma_gpio_init(&bus->drv_cc);
221 if (err == -ENOTSUPP)
222 bcma_debug(bus, "GPIO driver not activated\n");
224 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
226 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
227 err = bcma_chipco_watchdog_register(&bus->drv_cc);
229 bcma_err(bus, "Error registering watchdog driver\n");
235 static void bcma_unregister_cores(struct bcma_bus *bus)
237 struct bcma_device *core, *tmp;
239 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
240 list_del(&core->list);
241 if (core->dev_registered)
242 device_unregister(&core->dev);
244 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
245 platform_device_unregister(bus->drv_cc.watchdog);
248 int bcma_bus_register(struct bcma_bus *bus)
251 struct bcma_device *core;
253 mutex_lock(&bcma_buses_mutex);
254 bus->num = bcma_bus_next_num++;
255 mutex_unlock(&bcma_buses_mutex);
257 /* Scan for devices (cores) */
258 err = bcma_bus_scan(bus);
260 bcma_err(bus, "Failed to scan: %d\n", err);
264 /* Early init CC core */
265 core = bcma_find_core(bus, bcma_cc_core_id(bus));
267 bus->drv_cc.core = core;
268 bcma_core_chipcommon_early_init(&bus->drv_cc);
271 /* Cores providing flash access go before SPROM init */
272 list_for_each_entry(core, &bus->cores, list) {
273 if (bcma_is_core_needed_early(core->id.id))
274 bcma_register_core(bus, core);
277 /* Try to get SPROM */
278 err = bcma_sprom_get(bus);
279 if (err == -ENOENT) {
280 bcma_err(bus, "No SPROM available\n");
282 bcma_err(bus, "Failed to get SPROM: %d\n", err);
285 core = bcma_find_core(bus, bcma_cc_core_id(bus));
287 bus->drv_cc.core = core;
288 bcma_core_chipcommon_init(&bus->drv_cc);
292 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
294 bus->drv_cc_b.core = core;
295 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
299 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
301 bus->drv_mips.core = core;
302 bcma_core_mips_init(&bus->drv_mips);
306 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
308 bus->drv_pci[0].core = core;
309 bcma_core_pci_init(&bus->drv_pci[0]);
313 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
315 bus->drv_pci[1].core = core;
316 bcma_core_pci_init(&bus->drv_pci[1]);
319 /* Init PCIe Gen 2 core */
320 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
322 bus->drv_pcie2.core = core;
323 bcma_core_pcie2_init(&bus->drv_pcie2);
326 /* Init GBIT MAC COMMON core */
327 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
329 bus->drv_gmac_cmn.core = core;
330 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
333 /* Register found cores */
334 bcma_register_devices(bus);
336 bcma_info(bus, "Bus registered\n");
341 void bcma_bus_unregister(struct bcma_bus *bus)
343 struct bcma_device *cores[3];
346 err = bcma_gpio_unregister(&bus->drv_cc);
348 bcma_err(bus, "Some GPIOs are still in use.\n");
350 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
352 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
354 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
355 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
356 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
358 bcma_unregister_cores(bus);
365 int __init bcma_bus_early_register(struct bcma_bus *bus,
366 struct bcma_device *core_cc,
367 struct bcma_device *core_mips)
370 struct bcma_device *core;
371 struct bcma_device_id match;
373 match.manuf = BCMA_MANUF_BCM;
374 match.id = bcma_cc_core_id(bus);
375 match.class = BCMA_CL_SIM;
376 match.rev = BCMA_ANY_REV;
378 /* Scan for chip common core */
379 err = bcma_bus_scan_early(bus, &match, core_cc);
381 bcma_err(bus, "Failed to scan for common core: %d\n", err);
385 match.manuf = BCMA_MANUF_MIPS;
386 match.id = BCMA_CORE_MIPS_74K;
387 match.class = BCMA_CL_SIM;
388 match.rev = BCMA_ANY_REV;
390 /* Scan for mips core */
391 err = bcma_bus_scan_early(bus, &match, core_mips);
393 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
397 /* Early init CC core */
398 core = bcma_find_core(bus, bcma_cc_core_id(bus));
400 bus->drv_cc.core = core;
401 bcma_core_chipcommon_early_init(&bus->drv_cc);
404 /* Early init MIPS core */
405 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
407 bus->drv_mips.core = core;
408 bcma_core_mips_early_init(&bus->drv_mips);
411 bcma_info(bus, "Early bus registered\n");
417 int bcma_bus_suspend(struct bcma_bus *bus)
419 struct bcma_device *core;
421 list_for_each_entry(core, &bus->cores, list) {
422 struct device_driver *drv = core->dev.driver;
424 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
432 int bcma_bus_resume(struct bcma_bus *bus)
434 struct bcma_device *core;
437 if (bus->drv_cc.core) {
438 bus->drv_cc.setup_done = false;
439 bcma_core_chipcommon_init(&bus->drv_cc);
442 list_for_each_entry(core, &bus->cores, list) {
443 struct device_driver *drv = core->dev.driver;
445 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
455 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
457 drv->drv.name = drv->name;
458 drv->drv.bus = &bcma_bus_type;
459 drv->drv.owner = owner;
461 return driver_register(&drv->drv);
463 EXPORT_SYMBOL_GPL(__bcma_driver_register);
465 void bcma_driver_unregister(struct bcma_driver *drv)
467 driver_unregister(&drv->drv);
469 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
471 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
473 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
474 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
475 const struct bcma_device_id *cid = &core->id;
476 const struct bcma_device_id *did;
478 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
479 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
480 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
481 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
482 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
488 static int bcma_device_probe(struct device *dev)
490 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
491 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
496 err = adrv->probe(core);
501 static int bcma_device_remove(struct device *dev)
503 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
504 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
513 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
515 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
517 return add_uevent_var(env,
518 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
519 core->id.manuf, core->id.id,
520 core->id.rev, core->id.class);
523 static int __init bcma_modinit(void)
527 err = bus_register(&bcma_bus_type);
531 #ifdef CONFIG_BCMA_HOST_PCI
532 err = bcma_host_pci_init();
534 pr_err("PCI host initialization failed\n");
541 fs_initcall(bcma_modinit);
543 static void __exit bcma_modexit(void)
545 #ifdef CONFIG_BCMA_HOST_PCI
546 bcma_host_pci_exit();
548 bus_unregister(&bcma_bus_type);
550 module_exit(bcma_modexit)