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 int bcma_register_cores(struct bcma_bus *bus)
125 struct bcma_device *core;
128 list_for_each_entry(core, &bus->cores, list) {
129 /* We support that cores ourself */
130 switch (core->id.id) {
131 case BCMA_CORE_4706_CHIPCOMMON:
132 case BCMA_CORE_CHIPCOMMON:
135 case BCMA_CORE_PCIE2:
136 case BCMA_CORE_MIPS_74K:
137 case BCMA_CORE_4706_MAC_GBIT_COMMON:
141 /* Only first GMAC core on BCM4706 is connected and working */
142 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
146 core->dev.release = bcma_release_core_dev;
147 core->dev.bus = &bcma_bus_type;
148 dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id);
150 switch (bus->hosttype) {
151 case BCMA_HOSTTYPE_PCI:
152 core->dev.parent = &bus->host_pci->dev;
153 core->dma_dev = &bus->host_pci->dev;
154 core->irq = bus->host_pci->irq;
156 case BCMA_HOSTTYPE_SOC:
157 core->dev.dma_mask = &core->dev.coherent_dma_mask;
158 core->dma_dev = &core->dev;
160 case BCMA_HOSTTYPE_SDIO:
164 err = device_register(&core->dev);
167 "Could not register dev for core 0x%03X\n",
169 put_device(&core->dev);
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 PCIe Gen 2 core */
286 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
288 bus->drv_pcie2.core = core;
289 bcma_core_pcie2_init(&bus->drv_pcie2);
292 /* Init GBIT MAC COMMON core */
293 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
295 bus->drv_gmac_cmn.core = core;
296 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
299 /* Register found cores */
300 bcma_register_cores(bus);
302 bcma_info(bus, "Bus registered\n");
307 void bcma_bus_unregister(struct bcma_bus *bus)
309 struct bcma_device *cores[3];
312 err = bcma_gpio_unregister(&bus->drv_cc);
314 bcma_err(bus, "Some GPIOs are still in use.\n");
316 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
318 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
319 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
320 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
322 bcma_unregister_cores(bus);
329 int __init bcma_bus_early_register(struct bcma_bus *bus,
330 struct bcma_device *core_cc,
331 struct bcma_device *core_mips)
334 struct bcma_device *core;
335 struct bcma_device_id match;
339 match.manuf = BCMA_MANUF_BCM;
340 match.id = bcma_cc_core_id(bus);
341 match.class = BCMA_CL_SIM;
342 match.rev = BCMA_ANY_REV;
344 /* Scan for chip common core */
345 err = bcma_bus_scan_early(bus, &match, core_cc);
347 bcma_err(bus, "Failed to scan for common core: %d\n", err);
351 match.manuf = BCMA_MANUF_MIPS;
352 match.id = BCMA_CORE_MIPS_74K;
353 match.class = BCMA_CL_SIM;
354 match.rev = BCMA_ANY_REV;
356 /* Scan for mips core */
357 err = bcma_bus_scan_early(bus, &match, core_mips);
359 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
363 /* Early init CC core */
364 core = bcma_find_core(bus, bcma_cc_core_id(bus));
366 bus->drv_cc.core = core;
367 bcma_core_chipcommon_early_init(&bus->drv_cc);
370 /* Early init MIPS core */
371 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
373 bus->drv_mips.core = core;
374 bcma_core_mips_early_init(&bus->drv_mips);
377 bcma_info(bus, "Early bus registered\n");
383 int bcma_bus_suspend(struct bcma_bus *bus)
385 struct bcma_device *core;
387 list_for_each_entry(core, &bus->cores, list) {
388 struct device_driver *drv = core->dev.driver;
390 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
398 int bcma_bus_resume(struct bcma_bus *bus)
400 struct bcma_device *core;
403 if (bus->drv_cc.core) {
404 bus->drv_cc.setup_done = false;
405 bcma_core_chipcommon_init(&bus->drv_cc);
408 list_for_each_entry(core, &bus->cores, list) {
409 struct device_driver *drv = core->dev.driver;
411 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
421 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
423 drv->drv.name = drv->name;
424 drv->drv.bus = &bcma_bus_type;
425 drv->drv.owner = owner;
427 return driver_register(&drv->drv);
429 EXPORT_SYMBOL_GPL(__bcma_driver_register);
431 void bcma_driver_unregister(struct bcma_driver *drv)
433 driver_unregister(&drv->drv);
435 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
437 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
439 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
440 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
441 const struct bcma_device_id *cid = &core->id;
442 const struct bcma_device_id *did;
444 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
445 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
446 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
447 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
448 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
454 static int bcma_device_probe(struct device *dev)
456 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
457 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
462 err = adrv->probe(core);
467 static int bcma_device_remove(struct device *dev)
469 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
470 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
479 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
481 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
483 return add_uevent_var(env,
484 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
485 core->id.manuf, core->id.id,
486 core->id.rev, core->id.class);
489 static int __init bcma_modinit(void)
493 err = bus_register(&bcma_bus_type);
497 #ifdef CONFIG_BCMA_HOST_PCI
498 err = bcma_host_pci_init();
500 pr_err("PCI host initialization failed\n");
507 fs_initcall(bcma_modinit);
509 static void __exit bcma_modexit(void)
511 #ifdef CONFIG_BCMA_HOST_PCI
512 bcma_host_pci_exit();
514 bus_unregister(&bcma_bus_type);
516 module_exit(bcma_modexit)