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:
178 case BCMA_CORE_PCIE2:
179 case BCMA_CORE_MIPS_74K:
180 case BCMA_CORE_4706_MAC_GBIT_COMMON:
184 /* Early cores were already registered */
185 if (bcma_is_core_needed_early(core->id.id))
188 /* Only first GMAC core on BCM4706 is connected and working */
189 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
193 bcma_register_core(bus, core);
196 #ifdef CONFIG_BCMA_DRIVER_MIPS
197 if (bus->drv_cc.pflash.present) {
198 err = platform_device_register(&bcma_pflash_dev);
200 bcma_err(bus, "Error registering parallel flash\n");
204 #ifdef CONFIG_BCMA_SFLASH
205 if (bus->drv_cc.sflash.present) {
206 err = platform_device_register(&bcma_sflash_dev);
208 bcma_err(bus, "Error registering serial flash\n");
212 #ifdef CONFIG_BCMA_NFLASH
213 if (bus->drv_cc.nflash.present) {
214 err = platform_device_register(&bcma_nflash_dev);
216 bcma_err(bus, "Error registering NAND flash\n");
219 err = bcma_gpio_init(&bus->drv_cc);
220 if (err == -ENOTSUPP)
221 bcma_debug(bus, "GPIO driver not activated\n");
223 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
225 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
226 err = bcma_chipco_watchdog_register(&bus->drv_cc);
228 bcma_err(bus, "Error registering watchdog driver\n");
234 static void bcma_unregister_cores(struct bcma_bus *bus)
236 struct bcma_device *core, *tmp;
238 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
239 list_del(&core->list);
240 if (core->dev_registered)
241 device_unregister(&core->dev);
243 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
244 platform_device_unregister(bus->drv_cc.watchdog);
247 int bcma_bus_register(struct bcma_bus *bus)
250 struct bcma_device *core;
252 mutex_lock(&bcma_buses_mutex);
253 bus->num = bcma_bus_next_num++;
254 mutex_unlock(&bcma_buses_mutex);
256 /* Scan for devices (cores) */
257 err = bcma_bus_scan(bus);
259 bcma_err(bus, "Failed to scan: %d\n", err);
263 /* Early init CC core */
264 core = bcma_find_core(bus, bcma_cc_core_id(bus));
266 bus->drv_cc.core = core;
267 bcma_core_chipcommon_early_init(&bus->drv_cc);
270 /* Cores providing flash access go before SPROM init */
271 list_for_each_entry(core, &bus->cores, list) {
272 if (bcma_is_core_needed_early(core->id.id))
273 bcma_register_core(bus, core);
276 /* Try to get SPROM */
277 err = bcma_sprom_get(bus);
278 if (err == -ENOENT) {
279 bcma_err(bus, "No SPROM available\n");
281 bcma_err(bus, "Failed to get SPROM: %d\n", err);
284 core = bcma_find_core(bus, bcma_cc_core_id(bus));
286 bus->drv_cc.core = core;
287 bcma_core_chipcommon_init(&bus->drv_cc);
291 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
293 bus->drv_mips.core = core;
294 bcma_core_mips_init(&bus->drv_mips);
298 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
300 bus->drv_pci[0].core = core;
301 bcma_core_pci_init(&bus->drv_pci[0]);
305 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
307 bus->drv_pci[1].core = core;
308 bcma_core_pci_init(&bus->drv_pci[1]);
311 /* Init PCIe Gen 2 core */
312 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
314 bus->drv_pcie2.core = core;
315 bcma_core_pcie2_init(&bus->drv_pcie2);
318 /* Init GBIT MAC COMMON core */
319 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
321 bus->drv_gmac_cmn.core = core;
322 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
325 /* Register found cores */
326 bcma_register_devices(bus);
328 bcma_info(bus, "Bus registered\n");
333 void bcma_bus_unregister(struct bcma_bus *bus)
335 struct bcma_device *cores[3];
338 err = bcma_gpio_unregister(&bus->drv_cc);
340 bcma_err(bus, "Some GPIOs are still in use.\n");
342 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
344 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
345 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
346 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
348 bcma_unregister_cores(bus);
355 int __init bcma_bus_early_register(struct bcma_bus *bus,
356 struct bcma_device *core_cc,
357 struct bcma_device *core_mips)
360 struct bcma_device *core;
361 struct bcma_device_id match;
363 match.manuf = BCMA_MANUF_BCM;
364 match.id = bcma_cc_core_id(bus);
365 match.class = BCMA_CL_SIM;
366 match.rev = BCMA_ANY_REV;
368 /* Scan for chip common core */
369 err = bcma_bus_scan_early(bus, &match, core_cc);
371 bcma_err(bus, "Failed to scan for common core: %d\n", err);
375 match.manuf = BCMA_MANUF_MIPS;
376 match.id = BCMA_CORE_MIPS_74K;
377 match.class = BCMA_CL_SIM;
378 match.rev = BCMA_ANY_REV;
380 /* Scan for mips core */
381 err = bcma_bus_scan_early(bus, &match, core_mips);
383 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
387 /* Early init CC core */
388 core = bcma_find_core(bus, bcma_cc_core_id(bus));
390 bus->drv_cc.core = core;
391 bcma_core_chipcommon_early_init(&bus->drv_cc);
394 /* Early init MIPS core */
395 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
397 bus->drv_mips.core = core;
398 bcma_core_mips_early_init(&bus->drv_mips);
401 bcma_info(bus, "Early bus registered\n");
407 int bcma_bus_suspend(struct bcma_bus *bus)
409 struct bcma_device *core;
411 list_for_each_entry(core, &bus->cores, list) {
412 struct device_driver *drv = core->dev.driver;
414 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
422 int bcma_bus_resume(struct bcma_bus *bus)
424 struct bcma_device *core;
427 if (bus->drv_cc.core) {
428 bus->drv_cc.setup_done = false;
429 bcma_core_chipcommon_init(&bus->drv_cc);
432 list_for_each_entry(core, &bus->cores, list) {
433 struct device_driver *drv = core->dev.driver;
435 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
445 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
447 drv->drv.name = drv->name;
448 drv->drv.bus = &bcma_bus_type;
449 drv->drv.owner = owner;
451 return driver_register(&drv->drv);
453 EXPORT_SYMBOL_GPL(__bcma_driver_register);
455 void bcma_driver_unregister(struct bcma_driver *drv)
457 driver_unregister(&drv->drv);
459 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
461 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
463 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
464 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
465 const struct bcma_device_id *cid = &core->id;
466 const struct bcma_device_id *did;
468 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
469 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
470 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
471 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
472 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
478 static int bcma_device_probe(struct device *dev)
480 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
481 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
486 err = adrv->probe(core);
491 static int bcma_device_remove(struct device *dev)
493 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
494 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
503 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
505 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
507 return add_uevent_var(env,
508 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
509 core->id.manuf, core->id.id,
510 core->id.rev, core->id.class);
513 static int __init bcma_modinit(void)
517 err = bus_register(&bcma_bus_type);
521 #ifdef CONFIG_BCMA_HOST_PCI
522 err = bcma_host_pci_init();
524 pr_err("PCI host initialization failed\n");
531 fs_initcall(bcma_modinit);
533 static void __exit bcma_modexit(void)
535 #ifdef CONFIG_BCMA_HOST_PCI
536 bcma_host_pci_exit();
538 bus_unregister(&bcma_bus_type);
540 module_exit(bcma_modexit)