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;
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 void bcma_device_remove(struct device *dev);
31 static int bcma_device_uevent(const 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, false);
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->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 device_initialize(&core->dev);
240 core->dev.release = bcma_release_core_dev;
241 core->dev.bus = &bcma_bus_type;
242 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
243 core->dev.parent = bus->dev;
245 bcma_of_fill_device(bus->dev, core);
247 switch (bus->hosttype) {
248 case BCMA_HOSTTYPE_PCI:
249 core->dma_dev = bus->dev;
250 core->irq = bus->host_pci->irq;
252 case BCMA_HOSTTYPE_SOC:
253 if (IS_ENABLED(CONFIG_OF) && bus->dev) {
254 core->dma_dev = bus->dev;
256 core->dev.dma_mask = &core->dev.coherent_dma_mask;
257 core->dma_dev = &core->dev;
260 case BCMA_HOSTTYPE_SDIO:
265 void bcma_init_bus(struct bcma_bus *bus)
267 mutex_lock(&bcma_buses_mutex);
268 bus->num = bcma_bus_next_num++;
269 mutex_unlock(&bcma_buses_mutex);
271 INIT_LIST_HEAD(&bus->cores);
274 bcma_detect_chip(bus);
277 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
281 err = device_add(&core->dev);
283 bcma_err(bus, "Could not register dev for core 0x%03X\n",
287 core->dev_registered = true;
290 static int bcma_register_devices(struct bcma_bus *bus)
292 struct bcma_device *core;
295 list_for_each_entry(core, &bus->cores, list) {
296 /* We support that core ourselves */
297 switch (core->id.id) {
298 case BCMA_CORE_4706_CHIPCOMMON:
299 case BCMA_CORE_CHIPCOMMON:
300 case BCMA_CORE_NS_CHIPCOMMON_B:
303 case BCMA_CORE_PCIE2:
304 case BCMA_CORE_MIPS_74K:
305 case BCMA_CORE_4706_MAC_GBIT_COMMON:
309 /* Early cores were already registered */
310 if (bcma_is_core_needed_early(core->id.id))
313 /* Only first GMAC core on BCM4706 is connected and working */
314 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
318 bcma_register_core(bus, core);
321 #ifdef CONFIG_BCMA_PFLASH
322 if (bus->drv_cc.pflash.present) {
323 err = platform_device_register(&bcma_pflash_dev);
325 bcma_err(bus, "Error registering parallel flash\n");
329 #ifdef CONFIG_BCMA_SFLASH
330 if (bus->drv_cc.sflash.present) {
331 err = platform_device_register(&bcma_sflash_dev);
333 bcma_err(bus, "Error registering serial flash\n");
337 #ifdef CONFIG_BCMA_NFLASH
338 if (bus->drv_cc.nflash.present) {
339 err = platform_device_register(&bcma_nflash_dev);
341 bcma_err(bus, "Error registering NAND flash\n");
344 err = bcma_gpio_init(&bus->drv_cc);
345 if (err == -ENOTSUPP)
346 bcma_debug(bus, "GPIO driver not activated\n");
348 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
352 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
353 err = bcma_chipco_watchdog_register(&bus->drv_cc);
355 bcma_err(bus, "Error registering watchdog driver\n");
361 void bcma_unregister_cores(struct bcma_bus *bus)
363 struct bcma_device *core, *tmp;
365 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
366 if (!core->dev_registered)
368 list_del(&core->list);
369 device_unregister(&core->dev);
371 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
372 platform_device_unregister(bus->drv_cc.watchdog);
374 /* Now no one uses internally-handled cores, we can free them */
375 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
376 list_del(&core->list);
377 put_device(&core->dev);
381 int bcma_bus_register(struct bcma_bus *bus)
384 struct bcma_device *core;
386 /* Scan for devices (cores) */
387 err = bcma_bus_scan(bus);
389 bcma_err(bus, "Failed to scan: %d\n", err);
393 /* Early init CC core */
394 core = bcma_find_core(bus, bcma_cc_core_id(bus));
396 bus->drv_cc.core = core;
397 bcma_core_chipcommon_early_init(&bus->drv_cc);
400 /* Early init PCIE core */
401 core = bcma_find_core(bus, BCMA_CORE_PCIE);
403 bus->drv_pci[0].core = core;
404 bcma_core_pci_early_init(&bus->drv_pci[0]);
408 of_platform_default_populate(bus->dev->of_node, NULL, bus->dev);
410 /* Cores providing flash access go before SPROM init */
411 list_for_each_entry(core, &bus->cores, list) {
412 if (bcma_is_core_needed_early(core->id.id))
413 bcma_register_core(bus, core);
416 /* Try to get SPROM */
417 err = bcma_sprom_get(bus);
418 if (err == -ENOENT) {
419 bcma_err(bus, "No SPROM available\n");
421 bcma_err(bus, "Failed to get SPROM: %d\n", err);
424 core = bcma_find_core(bus, bcma_cc_core_id(bus));
426 bus->drv_cc.core = core;
427 bcma_core_chipcommon_init(&bus->drv_cc);
431 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
433 bus->drv_cc_b.core = core;
434 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
438 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
440 bus->drv_mips.core = core;
441 bcma_core_mips_init(&bus->drv_mips);
445 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
447 bus->drv_pci[0].core = core;
448 bcma_core_pci_init(&bus->drv_pci[0]);
452 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
454 bus->drv_pci[1].core = core;
455 bcma_core_pci_init(&bus->drv_pci[1]);
458 /* Init PCIe Gen 2 core */
459 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
461 bus->drv_pcie2.core = core;
462 bcma_core_pcie2_init(&bus->drv_pcie2);
465 /* Init GBIT MAC COMMON core */
466 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
468 bus->drv_gmac_cmn.core = core;
469 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
472 /* Register found cores */
473 bcma_register_devices(bus);
475 bcma_info(bus, "Bus registered\n");
480 void bcma_bus_unregister(struct bcma_bus *bus)
484 err = bcma_gpio_unregister(&bus->drv_cc);
486 bcma_err(bus, "Some GPIOs are still in use.\n");
488 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
490 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
492 bcma_unregister_cores(bus);
496 * This is a special version of bus registration function designed for SoCs.
497 * It scans bus and performs basic initialization of main cores only.
498 * Please note it requires memory allocation, however it won't try to sleep.
500 int __init bcma_bus_early_register(struct bcma_bus *bus)
503 struct bcma_device *core;
505 /* Scan for devices (cores) */
506 err = bcma_bus_scan(bus);
508 bcma_err(bus, "Failed to scan bus: %d\n", err);
512 /* Early init CC core */
513 core = bcma_find_core(bus, bcma_cc_core_id(bus));
515 bus->drv_cc.core = core;
516 bcma_core_chipcommon_early_init(&bus->drv_cc);
519 /* Early init MIPS core */
520 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
522 bus->drv_mips.core = core;
523 bcma_core_mips_early_init(&bus->drv_mips);
526 bcma_info(bus, "Early bus registered\n");
532 int bcma_bus_suspend(struct bcma_bus *bus)
534 struct bcma_device *core;
536 list_for_each_entry(core, &bus->cores, list) {
537 struct device_driver *drv = core->dev.driver;
539 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
547 int bcma_bus_resume(struct bcma_bus *bus)
549 struct bcma_device *core;
552 if (bus->drv_cc.core) {
553 bus->drv_cc.setup_done = false;
554 bcma_core_chipcommon_init(&bus->drv_cc);
557 list_for_each_entry(core, &bus->cores, list) {
558 struct device_driver *drv = core->dev.driver;
560 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
570 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
572 drv->drv.name = drv->name;
573 drv->drv.bus = &bcma_bus_type;
574 drv->drv.owner = owner;
576 return driver_register(&drv->drv);
578 EXPORT_SYMBOL_GPL(__bcma_driver_register);
580 void bcma_driver_unregister(struct bcma_driver *drv)
582 driver_unregister(&drv->drv);
584 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
586 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
588 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
589 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
590 const struct bcma_device_id *cid = &core->id;
591 const struct bcma_device_id *did;
593 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
594 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
595 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
596 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
597 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
603 static int bcma_device_probe(struct device *dev)
605 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
606 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
612 err = adrv->probe(core);
619 static void bcma_device_remove(struct device *dev)
621 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
622 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
630 static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
632 const struct bcma_device *core = container_of_const(dev, struct bcma_device, dev);
634 return add_uevent_var(env,
635 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
636 core->id.manuf, core->id.id,
637 core->id.rev, core->id.class);
640 static unsigned int bcma_bus_registered;
643 * If built-in, bus has to be registered early, before any driver calls
644 * bcma_driver_register.
645 * Otherwise registering driver would trigger BUG in driver_register.
647 static int __init bcma_init_bus_register(void)
651 if (bcma_bus_registered)
654 err = bus_register(&bcma_bus_type);
656 bcma_bus_registered = 1;
661 fs_initcall(bcma_init_bus_register);
664 /* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
665 static int __init bcma_modinit(void)
669 err = bcma_init_bus_register();
673 err = bcma_host_soc_register_driver();
675 pr_err("SoC host initialization failed\n");
678 #ifdef CONFIG_BCMA_HOST_PCI
679 err = bcma_host_pci_init();
681 pr_err("PCI host initialization failed\n");
688 module_init(bcma_modinit);
690 static void __exit bcma_modexit(void)
692 #ifdef CONFIG_BCMA_HOST_PCI
693 bcma_host_pci_exit();
695 bcma_host_soc_unregister_driver();
696 bus_unregister(&bcma_bus_type);
698 module_exit(bcma_modexit)