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>
13 #include <linux/of_address.h>
15 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
16 MODULE_LICENSE("GPL");
18 /* contains the number the next bus should get. */
19 static unsigned int bcma_bus_next_num = 0;
21 /* bcma_buses_mutex locks the bcma_bus_next_num */
22 static DEFINE_MUTEX(bcma_buses_mutex);
24 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
25 static int bcma_device_probe(struct device *dev);
26 static int bcma_device_remove(struct device *dev);
27 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
29 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
31 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
32 return sprintf(buf, "0x%03X\n", core->id.manuf);
34 static DEVICE_ATTR_RO(manuf);
36 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
38 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
39 return sprintf(buf, "0x%03X\n", core->id.id);
41 static DEVICE_ATTR_RO(id);
43 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
45 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
46 return sprintf(buf, "0x%02X\n", core->id.rev);
48 static DEVICE_ATTR_RO(rev);
50 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
52 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
53 return sprintf(buf, "0x%X\n", core->id.class);
55 static DEVICE_ATTR_RO(class);
57 static struct attribute *bcma_device_attrs[] = {
64 ATTRIBUTE_GROUPS(bcma_device);
66 static struct bus_type bcma_bus_type = {
68 .match = bcma_bus_match,
69 .probe = bcma_device_probe,
70 .remove = bcma_device_remove,
71 .uevent = bcma_device_uevent,
72 .dev_groups = bcma_device_groups,
75 static u16 bcma_cc_core_id(struct bcma_bus *bus)
77 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
78 return BCMA_CORE_4706_CHIPCOMMON;
79 return BCMA_CORE_CHIPCOMMON;
82 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
85 struct bcma_device *core;
87 list_for_each_entry(core, &bus->cores, list) {
88 if (core->id.id == coreid && core->core_unit == unit)
93 EXPORT_SYMBOL_GPL(bcma_find_core_unit);
95 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
98 unsigned long deadline = jiffies + timeout;
102 val = bcma_read32(core, reg);
103 if ((val & mask) == value)
107 } while (!time_after_eq(jiffies, deadline));
109 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
114 static void bcma_release_core_dev(struct device *dev)
116 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
118 iounmap(core->io_addr);
120 iounmap(core->io_wrap);
124 static bool bcma_is_core_needed_early(u16 core_id)
127 case BCMA_CORE_NS_NAND:
128 case BCMA_CORE_NS_QSPI:
136 static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
137 struct bcma_device *core)
139 struct device_node *node;
143 if (!parent || !parent->dev.of_node)
146 for_each_child_of_node(parent->dev.of_node, node) {
147 reg = of_get_address(node, 0, &size, NULL);
150 if (of_translate_address(node, reg) == core->addr)
156 static void bcma_of_fill_device(struct platform_device *parent,
157 struct bcma_device *core)
159 struct device_node *node;
161 node = bcma_of_find_child_device(parent, core);
163 core->dev.of_node = node;
166 static void bcma_of_fill_device(struct platform_device *parent,
167 struct bcma_device *core)
170 #endif /* CONFIG_OF */
172 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
174 core->dev.release = bcma_release_core_dev;
175 core->dev.bus = &bcma_bus_type;
176 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
178 switch (bus->hosttype) {
179 case BCMA_HOSTTYPE_PCI:
180 core->dev.parent = &bus->host_pci->dev;
181 core->dma_dev = &bus->host_pci->dev;
182 core->irq = bus->host_pci->irq;
184 case BCMA_HOSTTYPE_SOC:
185 core->dev.dma_mask = &core->dev.coherent_dma_mask;
186 if (bus->host_pdev) {
187 core->dma_dev = &bus->host_pdev->dev;
188 core->dev.parent = &bus->host_pdev->dev;
189 bcma_of_fill_device(bus->host_pdev, core);
191 core->dma_dev = &core->dev;
194 case BCMA_HOSTTYPE_SDIO:
199 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
203 err = device_register(&core->dev);
205 bcma_err(bus, "Could not register dev for core 0x%03X\n",
207 put_device(&core->dev);
210 core->dev_registered = true;
213 static int bcma_register_devices(struct bcma_bus *bus)
215 struct bcma_device *core;
218 list_for_each_entry(core, &bus->cores, list) {
219 /* We support that cores ourself */
220 switch (core->id.id) {
221 case BCMA_CORE_4706_CHIPCOMMON:
222 case BCMA_CORE_CHIPCOMMON:
223 case BCMA_CORE_NS_CHIPCOMMON_B:
226 case BCMA_CORE_PCIE2:
227 case BCMA_CORE_MIPS_74K:
228 case BCMA_CORE_4706_MAC_GBIT_COMMON:
232 /* Early cores were already registered */
233 if (bcma_is_core_needed_early(core->id.id))
236 /* Only first GMAC core on BCM4706 is connected and working */
237 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
241 bcma_register_core(bus, core);
244 #ifdef CONFIG_BCMA_DRIVER_MIPS
245 if (bus->drv_cc.pflash.present) {
246 err = platform_device_register(&bcma_pflash_dev);
248 bcma_err(bus, "Error registering parallel flash\n");
252 #ifdef CONFIG_BCMA_SFLASH
253 if (bus->drv_cc.sflash.present) {
254 err = platform_device_register(&bcma_sflash_dev);
256 bcma_err(bus, "Error registering serial flash\n");
260 #ifdef CONFIG_BCMA_NFLASH
261 if (bus->drv_cc.nflash.present) {
262 err = platform_device_register(&bcma_nflash_dev);
264 bcma_err(bus, "Error registering NAND flash\n");
267 err = bcma_gpio_init(&bus->drv_cc);
268 if (err == -ENOTSUPP)
269 bcma_debug(bus, "GPIO driver not activated\n");
271 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
273 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
274 err = bcma_chipco_watchdog_register(&bus->drv_cc);
276 bcma_err(bus, "Error registering watchdog driver\n");
282 static void bcma_unregister_cores(struct bcma_bus *bus)
284 struct bcma_device *core, *tmp;
286 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
287 list_del(&core->list);
288 if (core->dev_registered)
289 device_unregister(&core->dev);
291 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
292 platform_device_unregister(bus->drv_cc.watchdog);
295 int bcma_bus_register(struct bcma_bus *bus)
298 struct bcma_device *core;
300 mutex_lock(&bcma_buses_mutex);
301 bus->num = bcma_bus_next_num++;
302 mutex_unlock(&bcma_buses_mutex);
304 /* Scan for devices (cores) */
305 err = bcma_bus_scan(bus);
307 bcma_err(bus, "Failed to scan: %d\n", err);
311 /* Early init CC core */
312 core = bcma_find_core(bus, bcma_cc_core_id(bus));
314 bus->drv_cc.core = core;
315 bcma_core_chipcommon_early_init(&bus->drv_cc);
318 /* Cores providing flash access go before SPROM init */
319 list_for_each_entry(core, &bus->cores, list) {
320 if (bcma_is_core_needed_early(core->id.id))
321 bcma_register_core(bus, core);
324 /* Try to get SPROM */
325 err = bcma_sprom_get(bus);
326 if (err == -ENOENT) {
327 bcma_err(bus, "No SPROM available\n");
329 bcma_err(bus, "Failed to get SPROM: %d\n", err);
332 core = bcma_find_core(bus, bcma_cc_core_id(bus));
334 bus->drv_cc.core = core;
335 bcma_core_chipcommon_init(&bus->drv_cc);
339 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
341 bus->drv_cc_b.core = core;
342 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
346 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
348 bus->drv_mips.core = core;
349 bcma_core_mips_init(&bus->drv_mips);
353 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
355 bus->drv_pci[0].core = core;
356 bcma_core_pci_init(&bus->drv_pci[0]);
360 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
362 bus->drv_pci[1].core = core;
363 bcma_core_pci_init(&bus->drv_pci[1]);
366 /* Init PCIe Gen 2 core */
367 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
369 bus->drv_pcie2.core = core;
370 bcma_core_pcie2_init(&bus->drv_pcie2);
373 /* Init GBIT MAC COMMON core */
374 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
376 bus->drv_gmac_cmn.core = core;
377 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
380 /* Register found cores */
381 bcma_register_devices(bus);
383 bcma_info(bus, "Bus registered\n");
388 void bcma_bus_unregister(struct bcma_bus *bus)
390 struct bcma_device *cores[3];
393 err = bcma_gpio_unregister(&bus->drv_cc);
395 bcma_err(bus, "Some GPIOs are still in use.\n");
397 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
399 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
401 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
402 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
403 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
405 bcma_unregister_cores(bus);
412 int __init bcma_bus_early_register(struct bcma_bus *bus,
413 struct bcma_device *core_cc,
414 struct bcma_device *core_mips)
417 struct bcma_device *core;
418 struct bcma_device_id match;
420 match.manuf = BCMA_MANUF_BCM;
421 match.id = bcma_cc_core_id(bus);
422 match.class = BCMA_CL_SIM;
423 match.rev = BCMA_ANY_REV;
425 /* Scan for chip common core */
426 err = bcma_bus_scan_early(bus, &match, core_cc);
428 bcma_err(bus, "Failed to scan for common core: %d\n", err);
432 match.manuf = BCMA_MANUF_MIPS;
433 match.id = BCMA_CORE_MIPS_74K;
434 match.class = BCMA_CL_SIM;
435 match.rev = BCMA_ANY_REV;
437 /* Scan for mips core */
438 err = bcma_bus_scan_early(bus, &match, core_mips);
440 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
444 /* Early init CC core */
445 core = bcma_find_core(bus, bcma_cc_core_id(bus));
447 bus->drv_cc.core = core;
448 bcma_core_chipcommon_early_init(&bus->drv_cc);
451 /* Early init MIPS core */
452 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
454 bus->drv_mips.core = core;
455 bcma_core_mips_early_init(&bus->drv_mips);
458 bcma_info(bus, "Early bus registered\n");
464 int bcma_bus_suspend(struct bcma_bus *bus)
466 struct bcma_device *core;
468 list_for_each_entry(core, &bus->cores, list) {
469 struct device_driver *drv = core->dev.driver;
471 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
479 int bcma_bus_resume(struct bcma_bus *bus)
481 struct bcma_device *core;
484 if (bus->drv_cc.core) {
485 bus->drv_cc.setup_done = false;
486 bcma_core_chipcommon_init(&bus->drv_cc);
489 list_for_each_entry(core, &bus->cores, list) {
490 struct device_driver *drv = core->dev.driver;
492 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
502 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
504 drv->drv.name = drv->name;
505 drv->drv.bus = &bcma_bus_type;
506 drv->drv.owner = owner;
508 return driver_register(&drv->drv);
510 EXPORT_SYMBOL_GPL(__bcma_driver_register);
512 void bcma_driver_unregister(struct bcma_driver *drv)
514 driver_unregister(&drv->drv);
516 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
518 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
520 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
521 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
522 const struct bcma_device_id *cid = &core->id;
523 const struct bcma_device_id *did;
525 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
526 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
527 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
528 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
529 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
535 static int bcma_device_probe(struct device *dev)
537 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
538 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
543 err = adrv->probe(core);
548 static int bcma_device_remove(struct device *dev)
550 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
551 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
560 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
562 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
564 return add_uevent_var(env,
565 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
566 core->id.manuf, core->id.id,
567 core->id.rev, core->id.class);
570 static int __init bcma_modinit(void)
574 err = bus_register(&bcma_bus_type);
578 err = bcma_host_soc_register_driver();
580 pr_err("SoC host initialization failed\n");
583 #ifdef CONFIG_BCMA_HOST_PCI
584 err = bcma_host_pci_init();
586 pr_err("PCI host initialization failed\n");
593 fs_initcall(bcma_modinit);
595 static void __exit bcma_modexit(void)
597 #ifdef CONFIG_BCMA_HOST_PCI
598 bcma_host_pci_exit();
600 bcma_host_soc_unregister_driver();
601 bus_unregister(&bcma_bus_type);
603 module_exit(bcma_modexit)