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 platform_device *parent,
140 struct bcma_device *core)
142 struct device_node *node;
146 if (!parent || !parent->dev.of_node)
149 for_each_child_of_node(parent->dev.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 platform_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->dev.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 platform_device *parent,
181 struct bcma_device *core, int num)
183 struct of_phandle_args out_irq;
186 if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent || !parent->dev.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 platform_device *parent,
200 struct bcma_device *core)
202 struct device_node *node;
204 if (!IS_ENABLED(CONFIG_OF_IRQ))
207 node = bcma_of_find_child_device(parent, core);
209 core->dev.of_node = node;
211 core->irq = bcma_of_get_irq(parent, core, 0);
213 of_dma_configure(&core->dev, node);
216 unsigned int bcma_core_irq(struct bcma_device *core, int num)
218 struct bcma_bus *bus = core->bus;
219 unsigned int mips_irq;
221 switch (bus->hosttype) {
222 case BCMA_HOSTTYPE_PCI:
223 return bus->host_pci->irq;
224 case BCMA_HOSTTYPE_SOC:
225 if (bus->drv_mips.core && num == 0) {
226 mips_irq = bcma_core_mips_irq(core);
227 return mips_irq <= 4 ? mips_irq + 2 : 0;
230 return bcma_of_get_irq(bus->host_pdev, core, num);
232 case BCMA_HOSTTYPE_SDIO:
238 EXPORT_SYMBOL(bcma_core_irq);
240 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
242 device_initialize(&core->dev);
243 core->dev.release = bcma_release_core_dev;
244 core->dev.bus = &bcma_bus_type;
245 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
247 switch (bus->hosttype) {
248 case BCMA_HOSTTYPE_PCI:
249 core->dev.parent = &bus->host_pci->dev;
250 core->dma_dev = &bus->host_pci->dev;
251 core->irq = bus->host_pci->irq;
253 case BCMA_HOSTTYPE_SOC:
254 if (IS_ENABLED(CONFIG_OF) && bus->host_pdev) {
255 core->dma_dev = &bus->host_pdev->dev;
256 core->dev.parent = &bus->host_pdev->dev;
257 bcma_of_fill_device(bus->host_pdev, core);
259 core->dev.dma_mask = &core->dev.coherent_dma_mask;
260 core->dma_dev = &core->dev;
263 case BCMA_HOSTTYPE_SDIO:
268 struct device *bcma_bus_get_host_dev(struct bcma_bus *bus)
270 switch (bus->hosttype) {
271 case BCMA_HOSTTYPE_PCI:
273 return &bus->host_pci->dev;
276 case BCMA_HOSTTYPE_SOC:
278 return &bus->host_pdev->dev;
281 case BCMA_HOSTTYPE_SDIO:
283 return &bus->host_sdio->dev;
290 void bcma_init_bus(struct bcma_bus *bus)
292 mutex_lock(&bcma_buses_mutex);
293 bus->num = bcma_bus_next_num++;
294 mutex_unlock(&bcma_buses_mutex);
296 INIT_LIST_HEAD(&bus->cores);
299 bcma_detect_chip(bus);
302 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
306 err = device_add(&core->dev);
308 bcma_err(bus, "Could not register dev for core 0x%03X\n",
312 core->dev_registered = true;
315 static int bcma_register_devices(struct bcma_bus *bus)
317 struct bcma_device *core;
320 list_for_each_entry(core, &bus->cores, list) {
321 /* We support that cores ourself */
322 switch (core->id.id) {
323 case BCMA_CORE_4706_CHIPCOMMON:
324 case BCMA_CORE_CHIPCOMMON:
325 case BCMA_CORE_NS_CHIPCOMMON_B:
328 case BCMA_CORE_PCIE2:
329 case BCMA_CORE_MIPS_74K:
330 case BCMA_CORE_4706_MAC_GBIT_COMMON:
334 /* Early cores were already registered */
335 if (bcma_is_core_needed_early(core->id.id))
338 /* Only first GMAC core on BCM4706 is connected and working */
339 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
343 bcma_register_core(bus, core);
346 #ifdef CONFIG_BCMA_PFLASH
347 if (bus->drv_cc.pflash.present) {
348 err = platform_device_register(&bcma_pflash_dev);
350 bcma_err(bus, "Error registering parallel flash\n");
354 #ifdef CONFIG_BCMA_SFLASH
355 if (bus->drv_cc.sflash.present) {
356 err = platform_device_register(&bcma_sflash_dev);
358 bcma_err(bus, "Error registering serial flash\n");
362 #ifdef CONFIG_BCMA_NFLASH
363 if (bus->drv_cc.nflash.present) {
364 err = platform_device_register(&bcma_nflash_dev);
366 bcma_err(bus, "Error registering NAND flash\n");
369 err = bcma_gpio_init(&bus->drv_cc);
370 if (err == -ENOTSUPP)
371 bcma_debug(bus, "GPIO driver not activated\n");
373 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
375 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
376 err = bcma_chipco_watchdog_register(&bus->drv_cc);
378 bcma_err(bus, "Error registering watchdog driver\n");
384 void bcma_unregister_cores(struct bcma_bus *bus)
386 struct bcma_device *core, *tmp;
388 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
389 if (!core->dev_registered)
391 list_del(&core->list);
392 device_unregister(&core->dev);
394 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
395 platform_device_unregister(bus->drv_cc.watchdog);
397 /* Now noone uses internally-handled cores, we can free them */
398 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
399 list_del(&core->list);
400 put_device(&core->dev);
404 int bcma_bus_register(struct bcma_bus *bus)
407 struct bcma_device *core;
410 /* Scan for devices (cores) */
411 err = bcma_bus_scan(bus);
413 bcma_err(bus, "Failed to scan: %d\n", err);
417 /* Early init CC core */
418 core = bcma_find_core(bus, bcma_cc_core_id(bus));
420 bus->drv_cc.core = core;
421 bcma_core_chipcommon_early_init(&bus->drv_cc);
424 /* Early init PCIE core */
425 core = bcma_find_core(bus, BCMA_CORE_PCIE);
427 bus->drv_pci[0].core = core;
428 bcma_core_pci_early_init(&bus->drv_pci[0]);
431 dev = bcma_bus_get_host_dev(bus);
433 of_platform_default_populate(dev->of_node, NULL, dev);
436 /* Cores providing flash access go before SPROM init */
437 list_for_each_entry(core, &bus->cores, list) {
438 if (bcma_is_core_needed_early(core->id.id))
439 bcma_register_core(bus, core);
442 /* Try to get SPROM */
443 err = bcma_sprom_get(bus);
444 if (err == -ENOENT) {
445 bcma_err(bus, "No SPROM available\n");
447 bcma_err(bus, "Failed to get SPROM: %d\n", err);
450 core = bcma_find_core(bus, bcma_cc_core_id(bus));
452 bus->drv_cc.core = core;
453 bcma_core_chipcommon_init(&bus->drv_cc);
457 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
459 bus->drv_cc_b.core = core;
460 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
464 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
466 bus->drv_mips.core = core;
467 bcma_core_mips_init(&bus->drv_mips);
471 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
473 bus->drv_pci[0].core = core;
474 bcma_core_pci_init(&bus->drv_pci[0]);
478 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
480 bus->drv_pci[1].core = core;
481 bcma_core_pci_init(&bus->drv_pci[1]);
484 /* Init PCIe Gen 2 core */
485 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
487 bus->drv_pcie2.core = core;
488 bcma_core_pcie2_init(&bus->drv_pcie2);
491 /* Init GBIT MAC COMMON core */
492 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
494 bus->drv_gmac_cmn.core = core;
495 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
498 /* Register found cores */
499 bcma_register_devices(bus);
501 bcma_info(bus, "Bus registered\n");
506 void bcma_bus_unregister(struct bcma_bus *bus)
510 err = bcma_gpio_unregister(&bus->drv_cc);
512 bcma_err(bus, "Some GPIOs are still in use.\n");
514 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
516 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
518 bcma_unregister_cores(bus);
522 * This is a special version of bus registration function designed for SoCs.
523 * It scans bus and performs basic initialization of main cores only.
524 * Please note it requires memory allocation, however it won't try to sleep.
526 int __init bcma_bus_early_register(struct bcma_bus *bus)
529 struct bcma_device *core;
531 /* Scan for devices (cores) */
532 err = bcma_bus_scan(bus);
534 bcma_err(bus, "Failed to scan bus: %d\n", err);
538 /* Early init CC core */
539 core = bcma_find_core(bus, bcma_cc_core_id(bus));
541 bus->drv_cc.core = core;
542 bcma_core_chipcommon_early_init(&bus->drv_cc);
545 /* Early init MIPS core */
546 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
548 bus->drv_mips.core = core;
549 bcma_core_mips_early_init(&bus->drv_mips);
552 bcma_info(bus, "Early bus registered\n");
558 int bcma_bus_suspend(struct bcma_bus *bus)
560 struct bcma_device *core;
562 list_for_each_entry(core, &bus->cores, list) {
563 struct device_driver *drv = core->dev.driver;
565 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
573 int bcma_bus_resume(struct bcma_bus *bus)
575 struct bcma_device *core;
578 if (bus->drv_cc.core) {
579 bus->drv_cc.setup_done = false;
580 bcma_core_chipcommon_init(&bus->drv_cc);
583 list_for_each_entry(core, &bus->cores, list) {
584 struct device_driver *drv = core->dev.driver;
586 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
596 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
598 drv->drv.name = drv->name;
599 drv->drv.bus = &bcma_bus_type;
600 drv->drv.owner = owner;
602 return driver_register(&drv->drv);
604 EXPORT_SYMBOL_GPL(__bcma_driver_register);
606 void bcma_driver_unregister(struct bcma_driver *drv)
608 driver_unregister(&drv->drv);
610 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
612 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
614 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
615 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
616 const struct bcma_device_id *cid = &core->id;
617 const struct bcma_device_id *did;
619 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
620 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
621 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
622 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
623 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
629 static int bcma_device_probe(struct device *dev)
631 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
632 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
638 err = adrv->probe(core);
645 static int bcma_device_remove(struct device *dev)
647 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
648 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
658 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
660 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
662 return add_uevent_var(env,
663 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
664 core->id.manuf, core->id.id,
665 core->id.rev, core->id.class);
668 static unsigned int bcma_bus_registered;
671 * If built-in, bus has to be registered early, before any driver calls
672 * bcma_driver_register.
673 * Otherwise registering driver would trigger BUG in driver_register.
675 static int __init bcma_init_bus_register(void)
679 if (bcma_bus_registered)
682 err = bus_register(&bcma_bus_type);
684 bcma_bus_registered = 1;
689 fs_initcall(bcma_init_bus_register);
692 /* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
693 static int __init bcma_modinit(void)
697 err = bcma_init_bus_register();
701 err = bcma_host_soc_register_driver();
703 pr_err("SoC host initialization failed\n");
706 #ifdef CONFIG_BCMA_HOST_PCI
707 err = bcma_host_pci_init();
709 pr_err("PCI host initialization failed\n");
716 module_init(bcma_modinit);
718 static void __exit bcma_modexit(void)
720 #ifdef CONFIG_BCMA_HOST_PCI
721 bcma_host_pci_exit();
723 bcma_host_soc_unregister_driver();
724 bus_unregister(&bcma_bus_type);
726 module_exit(bcma_modexit)