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_device.h>
18 #include <linux/of_platform.h>
20 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
21 MODULE_LICENSE("GPL");
23 /* contains the number the next bus should get. */
24 static unsigned int bcma_bus_next_num;
26 /* bcma_buses_mutex locks the bcma_bus_next_num */
27 static DEFINE_MUTEX(bcma_buses_mutex);
29 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
30 static int bcma_device_probe(struct device *dev);
31 static void bcma_device_remove(struct device *dev);
32 static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env);
34 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
36 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
37 return sprintf(buf, "0x%03X\n", core->id.manuf);
39 static DEVICE_ATTR_RO(manuf);
41 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
43 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
44 return sprintf(buf, "0x%03X\n", core->id.id);
46 static DEVICE_ATTR_RO(id);
48 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
50 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
51 return sprintf(buf, "0x%02X\n", core->id.rev);
53 static DEVICE_ATTR_RO(rev);
55 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
57 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
58 return sprintf(buf, "0x%X\n", core->id.class);
60 static DEVICE_ATTR_RO(class);
62 static struct attribute *bcma_device_attrs[] = {
69 ATTRIBUTE_GROUPS(bcma_device);
71 static struct bus_type bcma_bus_type = {
73 .match = bcma_bus_match,
74 .probe = bcma_device_probe,
75 .remove = bcma_device_remove,
76 .uevent = bcma_device_uevent,
77 .dev_groups = bcma_device_groups,
80 static u16 bcma_cc_core_id(struct bcma_bus *bus)
82 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
83 return BCMA_CORE_4706_CHIPCOMMON;
84 return BCMA_CORE_CHIPCOMMON;
87 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
90 struct bcma_device *core;
92 list_for_each_entry(core, &bus->cores, list) {
93 if (core->id.id == coreid && core->core_unit == unit)
98 EXPORT_SYMBOL_GPL(bcma_find_core_unit);
100 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
103 unsigned long deadline = jiffies + timeout;
107 val = bcma_read32(core, reg);
108 if ((val & mask) == value)
112 } while (!time_after_eq(jiffies, deadline));
114 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
119 static void bcma_release_core_dev(struct device *dev)
121 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
123 iounmap(core->io_addr);
125 iounmap(core->io_wrap);
129 static bool bcma_is_core_needed_early(u16 core_id)
132 case BCMA_CORE_NS_NAND:
133 case BCMA_CORE_NS_QSPI:
140 static struct device_node *bcma_of_find_child_device(struct device *parent,
141 struct bcma_device *core)
143 struct device_node *node;
146 if (!parent->of_node)
149 for_each_child_of_node(parent->of_node, node) {
151 ret = of_address_to_resource(node, 0, &res);
154 if (res.start == core->addr)
160 static int bcma_of_irq_parse(struct device *parent,
161 struct bcma_device *core,
162 struct of_phandle_args *out_irq, int num)
167 if (core->dev.of_node) {
168 rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
173 out_irq->np = parent->of_node;
174 out_irq->args_count = 1;
175 out_irq->args[0] = num;
177 laddr[0] = cpu_to_be32(core->addr);
178 return of_irq_parse_raw(laddr, out_irq);
181 static unsigned int bcma_of_get_irq(struct device *parent,
182 struct bcma_device *core, int num)
184 struct of_phandle_args out_irq;
187 if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent->of_node)
190 ret = bcma_of_irq_parse(parent, core, &out_irq, num);
192 bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
197 return irq_create_of_mapping(&out_irq);
200 static void bcma_of_fill_device(struct device *parent,
201 struct bcma_device *core)
203 struct device_node *node;
205 node = bcma_of_find_child_device(parent, core);
207 core->dev.of_node = node;
209 core->irq = bcma_of_get_irq(parent, core, 0);
211 of_dma_configure(&core->dev, node, false);
214 unsigned int bcma_core_irq(struct bcma_device *core, int num)
216 struct bcma_bus *bus = core->bus;
217 unsigned int mips_irq;
219 switch (bus->hosttype) {
220 case BCMA_HOSTTYPE_PCI:
221 return bus->host_pci->irq;
222 case BCMA_HOSTTYPE_SOC:
223 if (bus->drv_mips.core && num == 0) {
224 mips_irq = bcma_core_mips_irq(core);
225 return mips_irq <= 4 ? mips_irq + 2 : 0;
228 return bcma_of_get_irq(bus->dev, core, num);
230 case BCMA_HOSTTYPE_SDIO:
236 EXPORT_SYMBOL(bcma_core_irq);
238 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
240 device_initialize(&core->dev);
241 core->dev.release = bcma_release_core_dev;
242 core->dev.bus = &bcma_bus_type;
243 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
244 core->dev.parent = bus->dev;
246 bcma_of_fill_device(bus->dev, core);
248 switch (bus->hosttype) {
249 case BCMA_HOSTTYPE_PCI:
250 core->dma_dev = bus->dev;
251 core->irq = bus->host_pci->irq;
253 case BCMA_HOSTTYPE_SOC:
254 if (IS_ENABLED(CONFIG_OF) && bus->dev) {
255 core->dma_dev = bus->dev;
257 core->dev.dma_mask = &core->dev.coherent_dma_mask;
258 core->dma_dev = &core->dev;
261 case BCMA_HOSTTYPE_SDIO:
266 void bcma_init_bus(struct bcma_bus *bus)
268 mutex_lock(&bcma_buses_mutex);
269 bus->num = bcma_bus_next_num++;
270 mutex_unlock(&bcma_buses_mutex);
272 INIT_LIST_HEAD(&bus->cores);
275 bcma_detect_chip(bus);
278 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
282 err = device_add(&core->dev);
284 bcma_err(bus, "Could not register dev for core 0x%03X\n",
288 core->dev_registered = true;
291 static int bcma_register_devices(struct bcma_bus *bus)
293 struct bcma_device *core;
296 list_for_each_entry(core, &bus->cores, list) {
297 /* We support that core ourselves */
298 switch (core->id.id) {
299 case BCMA_CORE_4706_CHIPCOMMON:
300 case BCMA_CORE_CHIPCOMMON:
301 case BCMA_CORE_NS_CHIPCOMMON_B:
304 case BCMA_CORE_PCIE2:
305 case BCMA_CORE_MIPS_74K:
306 case BCMA_CORE_4706_MAC_GBIT_COMMON:
310 /* Early cores were already registered */
311 if (bcma_is_core_needed_early(core->id.id))
314 /* Only first GMAC core on BCM4706 is connected and working */
315 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
319 bcma_register_core(bus, core);
322 #ifdef CONFIG_BCMA_PFLASH
323 if (bus->drv_cc.pflash.present) {
324 err = platform_device_register(&bcma_pflash_dev);
326 bcma_err(bus, "Error registering parallel flash\n");
330 #ifdef CONFIG_BCMA_SFLASH
331 if (bus->drv_cc.sflash.present) {
332 err = platform_device_register(&bcma_sflash_dev);
334 bcma_err(bus, "Error registering serial flash\n");
338 #ifdef CONFIG_BCMA_NFLASH
339 if (bus->drv_cc.nflash.present) {
340 err = platform_device_register(&bcma_nflash_dev);
342 bcma_err(bus, "Error registering NAND flash\n");
345 err = bcma_gpio_init(&bus->drv_cc);
346 if (err == -ENOTSUPP)
347 bcma_debug(bus, "GPIO driver not activated\n");
349 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
353 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
354 err = bcma_chipco_watchdog_register(&bus->drv_cc);
356 bcma_err(bus, "Error registering watchdog driver\n");
362 void bcma_unregister_cores(struct bcma_bus *bus)
364 struct bcma_device *core, *tmp;
366 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
367 if (!core->dev_registered)
369 list_del(&core->list);
370 device_unregister(&core->dev);
372 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
373 platform_device_unregister(bus->drv_cc.watchdog);
375 /* Now no one uses internally-handled cores, we can free them */
376 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
377 list_del(&core->list);
378 put_device(&core->dev);
382 int bcma_bus_register(struct bcma_bus *bus)
385 struct bcma_device *core;
387 /* Scan for devices (cores) */
388 err = bcma_bus_scan(bus);
390 bcma_err(bus, "Failed to scan: %d\n", err);
394 /* Early init CC core */
395 core = bcma_find_core(bus, bcma_cc_core_id(bus));
397 bus->drv_cc.core = core;
398 bcma_core_chipcommon_early_init(&bus->drv_cc);
401 /* Early init PCIE core */
402 core = bcma_find_core(bus, BCMA_CORE_PCIE);
404 bus->drv_pci[0].core = core;
405 bcma_core_pci_early_init(&bus->drv_pci[0]);
409 of_platform_default_populate(bus->dev->of_node, NULL, bus->dev);
411 /* Cores providing flash access go before SPROM init */
412 list_for_each_entry(core, &bus->cores, list) {
413 if (bcma_is_core_needed_early(core->id.id))
414 bcma_register_core(bus, core);
417 /* Try to get SPROM */
418 err = bcma_sprom_get(bus);
419 if (err == -ENOENT) {
420 bcma_err(bus, "No SPROM available\n");
422 bcma_err(bus, "Failed to get SPROM: %d\n", err);
425 core = bcma_find_core(bus, bcma_cc_core_id(bus));
427 bus->drv_cc.core = core;
428 bcma_core_chipcommon_init(&bus->drv_cc);
432 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
434 bus->drv_cc_b.core = core;
435 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
439 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
441 bus->drv_mips.core = core;
442 bcma_core_mips_init(&bus->drv_mips);
446 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
448 bus->drv_pci[0].core = core;
449 bcma_core_pci_init(&bus->drv_pci[0]);
453 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
455 bus->drv_pci[1].core = core;
456 bcma_core_pci_init(&bus->drv_pci[1]);
459 /* Init PCIe Gen 2 core */
460 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
462 bus->drv_pcie2.core = core;
463 bcma_core_pcie2_init(&bus->drv_pcie2);
466 /* Init GBIT MAC COMMON core */
467 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
469 bus->drv_gmac_cmn.core = core;
470 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
473 /* Register found cores */
474 bcma_register_devices(bus);
476 bcma_info(bus, "Bus registered\n");
481 void bcma_bus_unregister(struct bcma_bus *bus)
485 err = bcma_gpio_unregister(&bus->drv_cc);
487 bcma_err(bus, "Some GPIOs are still in use.\n");
489 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
491 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
493 bcma_unregister_cores(bus);
497 * This is a special version of bus registration function designed for SoCs.
498 * It scans bus and performs basic initialization of main cores only.
499 * Please note it requires memory allocation, however it won't try to sleep.
501 int __init bcma_bus_early_register(struct bcma_bus *bus)
504 struct bcma_device *core;
506 /* Scan for devices (cores) */
507 err = bcma_bus_scan(bus);
509 bcma_err(bus, "Failed to scan bus: %d\n", err);
513 /* Early init CC core */
514 core = bcma_find_core(bus, bcma_cc_core_id(bus));
516 bus->drv_cc.core = core;
517 bcma_core_chipcommon_early_init(&bus->drv_cc);
520 /* Early init MIPS core */
521 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
523 bus->drv_mips.core = core;
524 bcma_core_mips_early_init(&bus->drv_mips);
527 bcma_info(bus, "Early bus registered\n");
533 int bcma_bus_suspend(struct bcma_bus *bus)
535 struct bcma_device *core;
537 list_for_each_entry(core, &bus->cores, list) {
538 struct device_driver *drv = core->dev.driver;
540 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
548 int bcma_bus_resume(struct bcma_bus *bus)
550 struct bcma_device *core;
553 if (bus->drv_cc.core) {
554 bus->drv_cc.setup_done = false;
555 bcma_core_chipcommon_init(&bus->drv_cc);
558 list_for_each_entry(core, &bus->cores, list) {
559 struct device_driver *drv = core->dev.driver;
561 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
571 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
573 drv->drv.name = drv->name;
574 drv->drv.bus = &bcma_bus_type;
575 drv->drv.owner = owner;
577 return driver_register(&drv->drv);
579 EXPORT_SYMBOL_GPL(__bcma_driver_register);
581 void bcma_driver_unregister(struct bcma_driver *drv)
583 driver_unregister(&drv->drv);
585 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
587 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
589 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
590 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
591 const struct bcma_device_id *cid = &core->id;
592 const struct bcma_device_id *did;
594 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
595 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
596 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
597 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
598 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
604 static int bcma_device_probe(struct device *dev)
606 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
607 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
613 err = adrv->probe(core);
620 static void bcma_device_remove(struct device *dev)
622 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
623 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
631 static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
633 const struct bcma_device *core = container_of_const(dev, struct bcma_device, dev);
635 return add_uevent_var(env,
636 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
637 core->id.manuf, core->id.id,
638 core->id.rev, core->id.class);
641 static unsigned int bcma_bus_registered;
644 * If built-in, bus has to be registered early, before any driver calls
645 * bcma_driver_register.
646 * Otherwise registering driver would trigger BUG in driver_register.
648 static int __init bcma_init_bus_register(void)
652 if (bcma_bus_registered)
655 err = bus_register(&bcma_bus_type);
657 bcma_bus_registered = 1;
662 fs_initcall(bcma_init_bus_register);
665 /* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
666 static int __init bcma_modinit(void)
670 err = bcma_init_bus_register();
674 err = bcma_host_soc_register_driver();
676 pr_err("SoC host initialization failed\n");
679 #ifdef CONFIG_BCMA_HOST_PCI
680 err = bcma_host_pci_init();
682 pr_err("PCI host initialization failed\n");
689 module_init(bcma_modinit);
691 static void __exit bcma_modexit(void)
693 #ifdef CONFIG_BCMA_HOST_PCI
694 bcma_host_pci_exit();
696 bcma_host_soc_unregister_driver();
697 bus_unregister(&bcma_bus_type);
699 module_exit(bcma_modexit)