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/mmc/sdio_func.h>
11 #include <linux/platform_device.h>
12 #include <linux/pci.h>
13 #include <linux/bcma/bcma.h>
14 #include <linux/slab.h>
15 #include <linux/of_address.h>
16 #include <linux/of_irq.h>
17 #include <linux/of_platform.h>
19 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
20 MODULE_LICENSE("GPL");
22 /* contains the number the next bus should get. */
23 static unsigned int bcma_bus_next_num = 0;
25 /* bcma_buses_mutex locks the bcma_bus_next_num */
26 static DEFINE_MUTEX(bcma_buses_mutex);
28 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
29 static int bcma_device_probe(struct device *dev);
30 static int bcma_device_remove(struct device *dev);
31 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
33 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
35 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
36 return sprintf(buf, "0x%03X\n", core->id.manuf);
38 static DEVICE_ATTR_RO(manuf);
40 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
42 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
43 return sprintf(buf, "0x%03X\n", core->id.id);
45 static DEVICE_ATTR_RO(id);
47 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
49 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
50 return sprintf(buf, "0x%02X\n", core->id.rev);
52 static DEVICE_ATTR_RO(rev);
54 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
56 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
57 return sprintf(buf, "0x%X\n", core->id.class);
59 static DEVICE_ATTR_RO(class);
61 static struct attribute *bcma_device_attrs[] = {
68 ATTRIBUTE_GROUPS(bcma_device);
70 static struct bus_type bcma_bus_type = {
72 .match = bcma_bus_match,
73 .probe = bcma_device_probe,
74 .remove = bcma_device_remove,
75 .uevent = bcma_device_uevent,
76 .dev_groups = bcma_device_groups,
79 static u16 bcma_cc_core_id(struct bcma_bus *bus)
81 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
82 return BCMA_CORE_4706_CHIPCOMMON;
83 return BCMA_CORE_CHIPCOMMON;
86 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
89 struct bcma_device *core;
91 list_for_each_entry(core, &bus->cores, list) {
92 if (core->id.id == coreid && core->core_unit == unit)
97 EXPORT_SYMBOL_GPL(bcma_find_core_unit);
99 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
102 unsigned long deadline = jiffies + timeout;
106 val = bcma_read32(core, reg);
107 if ((val & mask) == value)
111 } while (!time_after_eq(jiffies, deadline));
113 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
118 static void bcma_release_core_dev(struct device *dev)
120 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
122 iounmap(core->io_addr);
124 iounmap(core->io_wrap);
128 static bool bcma_is_core_needed_early(u16 core_id)
131 case BCMA_CORE_NS_NAND:
132 case BCMA_CORE_NS_QSPI:
139 static struct device_node *bcma_of_find_child_device(struct device *parent,
140 struct bcma_device *core)
142 struct device_node *node;
146 if (!parent->of_node)
149 for_each_child_of_node(parent->of_node, node) {
150 reg = of_get_address(node, 0, &size, NULL);
153 if (of_translate_address(node, reg) == core->addr)
159 static int bcma_of_irq_parse(struct device *parent,
160 struct bcma_device *core,
161 struct of_phandle_args *out_irq, int num)
166 if (core->dev.of_node) {
167 rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
172 out_irq->np = parent->of_node;
173 out_irq->args_count = 1;
174 out_irq->args[0] = num;
176 laddr[0] = cpu_to_be32(core->addr);
177 return of_irq_parse_raw(laddr, out_irq);
180 static unsigned int bcma_of_get_irq(struct device *parent,
181 struct bcma_device *core, int num)
183 struct of_phandle_args out_irq;
186 if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent->of_node)
189 ret = bcma_of_irq_parse(parent, core, &out_irq, num);
191 bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
196 return irq_create_of_mapping(&out_irq);
199 static void bcma_of_fill_device(struct device *parent,
200 struct bcma_device *core)
202 struct device_node *node;
204 node = bcma_of_find_child_device(parent, core);
206 core->dev.of_node = node;
208 core->irq = bcma_of_get_irq(parent, core, 0);
210 of_dma_configure(&core->dev, node);
213 unsigned int bcma_core_irq(struct bcma_device *core, int num)
215 struct bcma_bus *bus = core->bus;
216 unsigned int mips_irq;
218 switch (bus->hosttype) {
219 case BCMA_HOSTTYPE_PCI:
220 return bus->host_pci->irq;
221 case BCMA_HOSTTYPE_SOC:
222 if (bus->drv_mips.core && num == 0) {
223 mips_irq = bcma_core_mips_irq(core);
224 return mips_irq <= 4 ? mips_irq + 2 : 0;
227 return bcma_of_get_irq(&bus->host_pdev->dev, core, num);
229 case BCMA_HOSTTYPE_SDIO:
235 EXPORT_SYMBOL(bcma_core_irq);
237 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
239 core->dev.release = bcma_release_core_dev;
240 core->dev.bus = &bcma_bus_type;
241 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
242 core->dev.parent = bcma_bus_get_host_dev(bus);
243 if (core->dev.parent)
244 bcma_of_fill_device(core->dev.parent, core);
246 switch (bus->hosttype) {
247 case BCMA_HOSTTYPE_PCI:
248 core->dma_dev = &bus->host_pci->dev;
249 core->irq = bus->host_pci->irq;
251 case BCMA_HOSTTYPE_SOC:
252 if (IS_ENABLED(CONFIG_OF) && bus->host_pdev) {
253 core->dma_dev = &bus->host_pdev->dev;
255 core->dev.dma_mask = &core->dev.coherent_dma_mask;
256 core->dma_dev = &core->dev;
259 case BCMA_HOSTTYPE_SDIO:
264 struct device *bcma_bus_get_host_dev(struct bcma_bus *bus)
266 switch (bus->hosttype) {
267 case BCMA_HOSTTYPE_PCI:
269 return &bus->host_pci->dev;
272 case BCMA_HOSTTYPE_SOC:
274 return &bus->host_pdev->dev;
277 case BCMA_HOSTTYPE_SDIO:
279 return &bus->host_sdio->dev;
286 void bcma_init_bus(struct bcma_bus *bus)
288 mutex_lock(&bcma_buses_mutex);
289 bus->num = bcma_bus_next_num++;
290 mutex_unlock(&bcma_buses_mutex);
292 INIT_LIST_HEAD(&bus->cores);
295 bcma_detect_chip(bus);
298 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
302 err = device_register(&core->dev);
304 bcma_err(bus, "Could not register dev for core 0x%03X\n",
306 put_device(&core->dev);
309 core->dev_registered = true;
312 static int bcma_register_devices(struct bcma_bus *bus)
314 struct bcma_device *core;
317 list_for_each_entry(core, &bus->cores, list) {
318 /* We support that cores ourself */
319 switch (core->id.id) {
320 case BCMA_CORE_4706_CHIPCOMMON:
321 case BCMA_CORE_CHIPCOMMON:
322 case BCMA_CORE_NS_CHIPCOMMON_B:
325 case BCMA_CORE_PCIE2:
326 case BCMA_CORE_MIPS_74K:
327 case BCMA_CORE_4706_MAC_GBIT_COMMON:
331 /* Early cores were already registered */
332 if (bcma_is_core_needed_early(core->id.id))
335 /* Only first GMAC core on BCM4706 is connected and working */
336 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
340 bcma_register_core(bus, core);
343 #ifdef CONFIG_BCMA_PFLASH
344 if (bus->drv_cc.pflash.present) {
345 err = platform_device_register(&bcma_pflash_dev);
347 bcma_err(bus, "Error registering parallel flash\n");
351 #ifdef CONFIG_BCMA_SFLASH
352 if (bus->drv_cc.sflash.present) {
353 err = platform_device_register(&bcma_sflash_dev);
355 bcma_err(bus, "Error registering serial flash\n");
359 #ifdef CONFIG_BCMA_NFLASH
360 if (bus->drv_cc.nflash.present) {
361 err = platform_device_register(&bcma_nflash_dev);
363 bcma_err(bus, "Error registering NAND flash\n");
366 err = bcma_gpio_init(&bus->drv_cc);
367 if (err == -ENOTSUPP)
368 bcma_debug(bus, "GPIO driver not activated\n");
370 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
372 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
373 err = bcma_chipco_watchdog_register(&bus->drv_cc);
375 bcma_err(bus, "Error registering watchdog driver\n");
381 void bcma_unregister_cores(struct bcma_bus *bus)
383 struct bcma_device *core, *tmp;
385 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
386 if (!core->dev_registered)
388 list_del(&core->list);
389 device_unregister(&core->dev);
391 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
392 platform_device_unregister(bus->drv_cc.watchdog);
394 /* Now noone uses internally-handled cores, we can free them */
395 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
396 list_del(&core->list);
401 int bcma_bus_register(struct bcma_bus *bus)
404 struct bcma_device *core;
407 /* Scan for devices (cores) */
408 err = bcma_bus_scan(bus);
410 bcma_err(bus, "Failed to scan: %d\n", err);
414 /* Early init CC core */
415 core = bcma_find_core(bus, bcma_cc_core_id(bus));
417 bus->drv_cc.core = core;
418 bcma_core_chipcommon_early_init(&bus->drv_cc);
421 /* Early init PCIE core */
422 core = bcma_find_core(bus, BCMA_CORE_PCIE);
424 bus->drv_pci[0].core = core;
425 bcma_core_pci_early_init(&bus->drv_pci[0]);
428 dev = bcma_bus_get_host_dev(bus);
430 of_platform_default_populate(dev->of_node, NULL, dev);
433 /* Cores providing flash access go before SPROM init */
434 list_for_each_entry(core, &bus->cores, list) {
435 if (bcma_is_core_needed_early(core->id.id))
436 bcma_register_core(bus, core);
439 /* Try to get SPROM */
440 err = bcma_sprom_get(bus);
441 if (err == -ENOENT) {
442 bcma_err(bus, "No SPROM available\n");
444 bcma_err(bus, "Failed to get SPROM: %d\n", err);
447 core = bcma_find_core(bus, bcma_cc_core_id(bus));
449 bus->drv_cc.core = core;
450 bcma_core_chipcommon_init(&bus->drv_cc);
454 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
456 bus->drv_cc_b.core = core;
457 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
461 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
463 bus->drv_mips.core = core;
464 bcma_core_mips_init(&bus->drv_mips);
468 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
470 bus->drv_pci[0].core = core;
471 bcma_core_pci_init(&bus->drv_pci[0]);
475 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
477 bus->drv_pci[1].core = core;
478 bcma_core_pci_init(&bus->drv_pci[1]);
481 /* Init PCIe Gen 2 core */
482 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
484 bus->drv_pcie2.core = core;
485 bcma_core_pcie2_init(&bus->drv_pcie2);
488 /* Init GBIT MAC COMMON core */
489 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
491 bus->drv_gmac_cmn.core = core;
492 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
495 /* Register found cores */
496 bcma_register_devices(bus);
498 bcma_info(bus, "Bus registered\n");
503 void bcma_bus_unregister(struct bcma_bus *bus)
507 err = bcma_gpio_unregister(&bus->drv_cc);
509 bcma_err(bus, "Some GPIOs are still in use.\n");
511 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
513 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
515 bcma_unregister_cores(bus);
519 * This is a special version of bus registration function designed for SoCs.
520 * It scans bus and performs basic initialization of main cores only.
521 * Please note it requires memory allocation, however it won't try to sleep.
523 int __init bcma_bus_early_register(struct bcma_bus *bus)
526 struct bcma_device *core;
528 /* Scan for devices (cores) */
529 err = bcma_bus_scan(bus);
531 bcma_err(bus, "Failed to scan bus: %d\n", err);
535 /* Early init CC core */
536 core = bcma_find_core(bus, bcma_cc_core_id(bus));
538 bus->drv_cc.core = core;
539 bcma_core_chipcommon_early_init(&bus->drv_cc);
542 /* Early init MIPS core */
543 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
545 bus->drv_mips.core = core;
546 bcma_core_mips_early_init(&bus->drv_mips);
549 bcma_info(bus, "Early bus registered\n");
555 int bcma_bus_suspend(struct bcma_bus *bus)
557 struct bcma_device *core;
559 list_for_each_entry(core, &bus->cores, list) {
560 struct device_driver *drv = core->dev.driver;
562 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
570 int bcma_bus_resume(struct bcma_bus *bus)
572 struct bcma_device *core;
575 if (bus->drv_cc.core) {
576 bus->drv_cc.setup_done = false;
577 bcma_core_chipcommon_init(&bus->drv_cc);
580 list_for_each_entry(core, &bus->cores, list) {
581 struct device_driver *drv = core->dev.driver;
583 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
593 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
595 drv->drv.name = drv->name;
596 drv->drv.bus = &bcma_bus_type;
597 drv->drv.owner = owner;
599 return driver_register(&drv->drv);
601 EXPORT_SYMBOL_GPL(__bcma_driver_register);
603 void bcma_driver_unregister(struct bcma_driver *drv)
605 driver_unregister(&drv->drv);
607 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
609 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
611 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
612 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
613 const struct bcma_device_id *cid = &core->id;
614 const struct bcma_device_id *did;
616 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
617 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
618 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
619 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
620 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
626 static int bcma_device_probe(struct device *dev)
628 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
629 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
635 err = adrv->probe(core);
642 static int bcma_device_remove(struct device *dev)
644 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
645 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
655 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
657 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
659 return add_uevent_var(env,
660 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
661 core->id.manuf, core->id.id,
662 core->id.rev, core->id.class);
665 static unsigned int bcma_bus_registered;
668 * If built-in, bus has to be registered early, before any driver calls
669 * bcma_driver_register.
670 * Otherwise registering driver would trigger BUG in driver_register.
672 static int __init bcma_init_bus_register(void)
676 if (bcma_bus_registered)
679 err = bus_register(&bcma_bus_type);
681 bcma_bus_registered = 1;
686 fs_initcall(bcma_init_bus_register);
689 /* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
690 static int __init bcma_modinit(void)
694 err = bcma_init_bus_register();
698 err = bcma_host_soc_register_driver();
700 pr_err("SoC host initialization failed\n");
703 #ifdef CONFIG_BCMA_HOST_PCI
704 err = bcma_host_pci_init();
706 pr_err("PCI host initialization failed\n");
713 module_init(bcma_modinit);
715 static void __exit bcma_modexit(void)
717 #ifdef CONFIG_BCMA_HOST_PCI
718 bcma_host_pci_exit();
720 bcma_host_soc_unregister_driver();
721 bus_unregister(&bcma_bus_type);
723 module_exit(bcma_modexit)