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(struct bcma_bus *bus, u16 coreid)
83 struct bcma_device *core;
85 list_for_each_entry(core, &bus->cores, list) {
86 if (core->id.id == coreid)
91 EXPORT_SYMBOL_GPL(bcma_find_core);
93 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
96 struct bcma_device *core;
98 list_for_each_entry(core, &bus->cores, list) {
99 if (core->id.id == coreid && core->core_unit == unit)
105 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
108 unsigned long deadline = jiffies + timeout;
112 val = bcma_read32(core, reg);
113 if ((val & mask) == value)
117 } while (!time_after_eq(jiffies, deadline));
119 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
124 static void bcma_release_core_dev(struct device *dev)
126 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
128 iounmap(core->io_addr);
130 iounmap(core->io_wrap);
134 static int bcma_register_cores(struct bcma_bus *bus)
136 struct bcma_device *core;
139 list_for_each_entry(core, &bus->cores, list) {
140 /* We support that cores ourself */
141 switch (core->id.id) {
142 case BCMA_CORE_4706_CHIPCOMMON:
143 case BCMA_CORE_CHIPCOMMON:
146 case BCMA_CORE_MIPS_74K:
147 case BCMA_CORE_4706_MAC_GBIT_COMMON:
151 /* Only first GMAC core on BCM4706 is connected and working */
152 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
156 core->dev.release = bcma_release_core_dev;
157 core->dev.bus = &bcma_bus_type;
158 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);
160 switch (bus->hosttype) {
161 case BCMA_HOSTTYPE_PCI:
162 core->dev.parent = &bus->host_pci->dev;
163 core->dma_dev = &bus->host_pci->dev;
164 core->irq = bus->host_pci->irq;
166 case BCMA_HOSTTYPE_SOC:
167 core->dev.dma_mask = &core->dev.coherent_dma_mask;
168 core->dma_dev = &core->dev;
170 case BCMA_HOSTTYPE_SDIO:
174 err = device_register(&core->dev);
177 "Could not register dev for core 0x%03X\n",
181 core->dev_registered = true;
185 #ifdef CONFIG_BCMA_DRIVER_MIPS
186 if (bus->drv_cc.pflash.present) {
187 err = platform_device_register(&bcma_pflash_dev);
189 bcma_err(bus, "Error registering parallel flash\n");
193 #ifdef CONFIG_BCMA_SFLASH
194 if (bus->drv_cc.sflash.present) {
195 err = platform_device_register(&bcma_sflash_dev);
197 bcma_err(bus, "Error registering serial flash\n");
201 #ifdef CONFIG_BCMA_NFLASH
202 if (bus->drv_cc.nflash.present) {
203 err = platform_device_register(&bcma_nflash_dev);
205 bcma_err(bus, "Error registering NAND flash\n");
208 err = bcma_gpio_init(&bus->drv_cc);
209 if (err == -ENOTSUPP)
210 bcma_debug(bus, "GPIO driver not activated\n");
212 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
214 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
215 err = bcma_chipco_watchdog_register(&bus->drv_cc);
217 bcma_err(bus, "Error registering watchdog driver\n");
223 static void bcma_unregister_cores(struct bcma_bus *bus)
225 struct bcma_device *core, *tmp;
227 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
228 list_del(&core->list);
229 if (core->dev_registered)
230 device_unregister(&core->dev);
232 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
233 platform_device_unregister(bus->drv_cc.watchdog);
236 int bcma_bus_register(struct bcma_bus *bus)
239 struct bcma_device *core;
241 mutex_lock(&bcma_buses_mutex);
242 bus->num = bcma_bus_next_num++;
243 mutex_unlock(&bcma_buses_mutex);
245 /* Scan for devices (cores) */
246 err = bcma_bus_scan(bus);
248 bcma_err(bus, "Failed to scan: %d\n", err);
252 /* Early init CC core */
253 core = bcma_find_core(bus, bcma_cc_core_id(bus));
255 bus->drv_cc.core = core;
256 bcma_core_chipcommon_early_init(&bus->drv_cc);
259 /* Try to get SPROM */
260 err = bcma_sprom_get(bus);
261 if (err == -ENOENT) {
262 bcma_err(bus, "No SPROM available\n");
264 bcma_err(bus, "Failed to get SPROM: %d\n", err);
267 core = bcma_find_core(bus, bcma_cc_core_id(bus));
269 bus->drv_cc.core = core;
270 bcma_core_chipcommon_init(&bus->drv_cc);
274 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
276 bus->drv_mips.core = core;
277 bcma_core_mips_init(&bus->drv_mips);
281 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
283 bus->drv_pci[0].core = core;
284 bcma_core_pci_init(&bus->drv_pci[0]);
288 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
290 bus->drv_pci[1].core = core;
291 bcma_core_pci_init(&bus->drv_pci[1]);
294 /* Init GBIT MAC COMMON core */
295 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
297 bus->drv_gmac_cmn.core = core;
298 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
301 /* Register found cores */
302 bcma_register_cores(bus);
304 bcma_info(bus, "Bus registered\n");
309 void bcma_bus_unregister(struct bcma_bus *bus)
311 struct bcma_device *cores[3];
314 err = bcma_gpio_unregister(&bus->drv_cc);
316 bcma_err(bus, "Some GPIOs are still in use.\n");
318 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
320 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
321 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
322 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
324 bcma_unregister_cores(bus);
331 int __init bcma_bus_early_register(struct bcma_bus *bus,
332 struct bcma_device *core_cc,
333 struct bcma_device *core_mips)
336 struct bcma_device *core;
337 struct bcma_device_id match;
341 match.manuf = BCMA_MANUF_BCM;
342 match.id = bcma_cc_core_id(bus);
343 match.class = BCMA_CL_SIM;
344 match.rev = BCMA_ANY_REV;
346 /* Scan for chip common core */
347 err = bcma_bus_scan_early(bus, &match, core_cc);
349 bcma_err(bus, "Failed to scan for common core: %d\n", err);
353 match.manuf = BCMA_MANUF_MIPS;
354 match.id = BCMA_CORE_MIPS_74K;
355 match.class = BCMA_CL_SIM;
356 match.rev = BCMA_ANY_REV;
358 /* Scan for mips core */
359 err = bcma_bus_scan_early(bus, &match, core_mips);
361 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
365 /* Early init CC core */
366 core = bcma_find_core(bus, bcma_cc_core_id(bus));
368 bus->drv_cc.core = core;
369 bcma_core_chipcommon_early_init(&bus->drv_cc);
372 /* Early init MIPS core */
373 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
375 bus->drv_mips.core = core;
376 bcma_core_mips_early_init(&bus->drv_mips);
379 bcma_info(bus, "Early bus registered\n");
385 int bcma_bus_suspend(struct bcma_bus *bus)
387 struct bcma_device *core;
389 list_for_each_entry(core, &bus->cores, list) {
390 struct device_driver *drv = core->dev.driver;
392 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
400 int bcma_bus_resume(struct bcma_bus *bus)
402 struct bcma_device *core;
405 if (bus->drv_cc.core) {
406 bus->drv_cc.setup_done = false;
407 bcma_core_chipcommon_init(&bus->drv_cc);
410 list_for_each_entry(core, &bus->cores, list) {
411 struct device_driver *drv = core->dev.driver;
413 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
423 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
425 drv->drv.name = drv->name;
426 drv->drv.bus = &bcma_bus_type;
427 drv->drv.owner = owner;
429 return driver_register(&drv->drv);
431 EXPORT_SYMBOL_GPL(__bcma_driver_register);
433 void bcma_driver_unregister(struct bcma_driver *drv)
435 driver_unregister(&drv->drv);
437 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
439 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
441 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
442 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
443 const struct bcma_device_id *cid = &core->id;
444 const struct bcma_device_id *did;
446 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
447 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
448 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
449 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
450 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
456 static int bcma_device_probe(struct device *dev)
458 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
459 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
464 err = adrv->probe(core);
469 static int bcma_device_remove(struct device *dev)
471 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
472 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
481 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
483 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
485 return add_uevent_var(env,
486 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
487 core->id.manuf, core->id.id,
488 core->id.rev, core->id.class);
491 static int __init bcma_modinit(void)
495 err = bus_register(&bcma_bus_type);
499 #ifdef CONFIG_BCMA_HOST_PCI
500 err = bcma_host_pci_init();
502 pr_err("PCI host initialization failed\n");
509 fs_initcall(bcma_modinit);
511 static void __exit bcma_modexit(void)
513 #ifdef CONFIG_BCMA_HOST_PCI
514 bcma_host_pci_exit();
516 bus_unregister(&bcma_bus_type);
518 module_exit(bcma_modexit)