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 void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
127 core->dev.release = bcma_release_core_dev;
128 core->dev.bus = &bcma_bus_type;
129 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
131 switch (bus->hosttype) {
132 case BCMA_HOSTTYPE_PCI:
133 core->dev.parent = &bus->host_pci->dev;
134 core->dma_dev = &bus->host_pci->dev;
135 core->irq = bus->host_pci->irq;
137 case BCMA_HOSTTYPE_SOC:
138 core->dev.dma_mask = &core->dev.coherent_dma_mask;
139 core->dma_dev = &core->dev;
141 case BCMA_HOSTTYPE_SDIO:
145 err = device_register(&core->dev);
147 bcma_err(bus, "Could not register dev for core 0x%03X\n",
149 put_device(&core->dev);
152 core->dev_registered = true;
155 static int bcma_register_devices(struct bcma_bus *bus)
157 struct bcma_device *core;
160 list_for_each_entry(core, &bus->cores, list) {
161 /* We support that cores ourself */
162 switch (core->id.id) {
163 case BCMA_CORE_4706_CHIPCOMMON:
164 case BCMA_CORE_CHIPCOMMON:
167 case BCMA_CORE_PCIE2:
168 case BCMA_CORE_MIPS_74K:
169 case BCMA_CORE_4706_MAC_GBIT_COMMON:
173 /* Only first GMAC core on BCM4706 is connected and working */
174 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
178 bcma_register_core(bus, core);
181 #ifdef CONFIG_BCMA_DRIVER_MIPS
182 if (bus->drv_cc.pflash.present) {
183 err = platform_device_register(&bcma_pflash_dev);
185 bcma_err(bus, "Error registering parallel flash\n");
189 #ifdef CONFIG_BCMA_SFLASH
190 if (bus->drv_cc.sflash.present) {
191 err = platform_device_register(&bcma_sflash_dev);
193 bcma_err(bus, "Error registering serial flash\n");
197 #ifdef CONFIG_BCMA_NFLASH
198 if (bus->drv_cc.nflash.present) {
199 err = platform_device_register(&bcma_nflash_dev);
201 bcma_err(bus, "Error registering NAND flash\n");
204 err = bcma_gpio_init(&bus->drv_cc);
205 if (err == -ENOTSUPP)
206 bcma_debug(bus, "GPIO driver not activated\n");
208 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
210 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
211 err = bcma_chipco_watchdog_register(&bus->drv_cc);
213 bcma_err(bus, "Error registering watchdog driver\n");
219 static void bcma_unregister_cores(struct bcma_bus *bus)
221 struct bcma_device *core, *tmp;
223 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
224 list_del(&core->list);
225 if (core->dev_registered)
226 device_unregister(&core->dev);
228 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
229 platform_device_unregister(bus->drv_cc.watchdog);
232 int bcma_bus_register(struct bcma_bus *bus)
235 struct bcma_device *core;
237 mutex_lock(&bcma_buses_mutex);
238 bus->num = bcma_bus_next_num++;
239 mutex_unlock(&bcma_buses_mutex);
241 /* Scan for devices (cores) */
242 err = bcma_bus_scan(bus);
244 bcma_err(bus, "Failed to scan: %d\n", err);
248 /* Early init CC core */
249 core = bcma_find_core(bus, bcma_cc_core_id(bus));
251 bus->drv_cc.core = core;
252 bcma_core_chipcommon_early_init(&bus->drv_cc);
255 /* Try to get SPROM */
256 err = bcma_sprom_get(bus);
257 if (err == -ENOENT) {
258 bcma_err(bus, "No SPROM available\n");
260 bcma_err(bus, "Failed to get SPROM: %d\n", err);
263 core = bcma_find_core(bus, bcma_cc_core_id(bus));
265 bus->drv_cc.core = core;
266 bcma_core_chipcommon_init(&bus->drv_cc);
270 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
272 bus->drv_mips.core = core;
273 bcma_core_mips_init(&bus->drv_mips);
277 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
279 bus->drv_pci[0].core = core;
280 bcma_core_pci_init(&bus->drv_pci[0]);
284 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
286 bus->drv_pci[1].core = core;
287 bcma_core_pci_init(&bus->drv_pci[1]);
290 /* Init PCIe Gen 2 core */
291 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
293 bus->drv_pcie2.core = core;
294 bcma_core_pcie2_init(&bus->drv_pcie2);
297 /* Init GBIT MAC COMMON core */
298 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
300 bus->drv_gmac_cmn.core = core;
301 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
304 /* Register found cores */
305 bcma_register_devices(bus);
307 bcma_info(bus, "Bus registered\n");
312 void bcma_bus_unregister(struct bcma_bus *bus)
314 struct bcma_device *cores[3];
317 err = bcma_gpio_unregister(&bus->drv_cc);
319 bcma_err(bus, "Some GPIOs are still in use.\n");
321 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
323 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
324 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
325 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
327 bcma_unregister_cores(bus);
334 int __init bcma_bus_early_register(struct bcma_bus *bus,
335 struct bcma_device *core_cc,
336 struct bcma_device *core_mips)
339 struct bcma_device *core;
340 struct bcma_device_id match;
342 match.manuf = BCMA_MANUF_BCM;
343 match.id = bcma_cc_core_id(bus);
344 match.class = BCMA_CL_SIM;
345 match.rev = BCMA_ANY_REV;
347 /* Scan for chip common core */
348 err = bcma_bus_scan_early(bus, &match, core_cc);
350 bcma_err(bus, "Failed to scan for common core: %d\n", err);
354 match.manuf = BCMA_MANUF_MIPS;
355 match.id = BCMA_CORE_MIPS_74K;
356 match.class = BCMA_CL_SIM;
357 match.rev = BCMA_ANY_REV;
359 /* Scan for mips core */
360 err = bcma_bus_scan_early(bus, &match, core_mips);
362 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
366 /* Early init CC core */
367 core = bcma_find_core(bus, bcma_cc_core_id(bus));
369 bus->drv_cc.core = core;
370 bcma_core_chipcommon_early_init(&bus->drv_cc);
373 /* Early init MIPS core */
374 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
376 bus->drv_mips.core = core;
377 bcma_core_mips_early_init(&bus->drv_mips);
380 bcma_info(bus, "Early bus registered\n");
386 int bcma_bus_suspend(struct bcma_bus *bus)
388 struct bcma_device *core;
390 list_for_each_entry(core, &bus->cores, list) {
391 struct device_driver *drv = core->dev.driver;
393 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
401 int bcma_bus_resume(struct bcma_bus *bus)
403 struct bcma_device *core;
406 if (bus->drv_cc.core) {
407 bus->drv_cc.setup_done = false;
408 bcma_core_chipcommon_init(&bus->drv_cc);
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);
424 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
426 drv->drv.name = drv->name;
427 drv->drv.bus = &bcma_bus_type;
428 drv->drv.owner = owner;
430 return driver_register(&drv->drv);
432 EXPORT_SYMBOL_GPL(__bcma_driver_register);
434 void bcma_driver_unregister(struct bcma_driver *drv)
436 driver_unregister(&drv->drv);
438 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
440 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
442 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
443 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
444 const struct bcma_device_id *cid = &core->id;
445 const struct bcma_device_id *did;
447 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
448 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
449 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
450 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
451 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
457 static int bcma_device_probe(struct device *dev)
459 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
460 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
465 err = adrv->probe(core);
470 static int bcma_device_remove(struct device *dev)
472 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
473 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
482 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
484 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
486 return add_uevent_var(env,
487 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
488 core->id.manuf, core->id.id,
489 core->id.rev, core->id.class);
492 static int __init bcma_modinit(void)
496 err = bus_register(&bcma_bus_type);
500 #ifdef CONFIG_BCMA_HOST_PCI
501 err = bcma_host_pci_init();
503 pr_err("PCI host initialization failed\n");
510 fs_initcall(bcma_modinit);
512 static void __exit bcma_modexit(void)
514 #ifdef CONFIG_BCMA_HOST_PCI
515 bcma_host_pci_exit();
517 bus_unregister(&bcma_bus_type);
519 module_exit(bcma_modexit)