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 #if defined(CONFIG_OF) && defined(CONFIG_OF_ADDRESS)
140 static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
141 struct bcma_device *core)
143 struct device_node *node;
147 if (!parent || !parent->dev.of_node)
150 for_each_child_of_node(parent->dev.of_node, node) {
151 reg = of_get_address(node, 0, &size, NULL);
154 if (of_translate_address(node, reg) == core->addr)
160 static int bcma_of_irq_parse(struct platform_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->dev.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 platform_device *parent,
182 struct bcma_device *core, int num)
184 struct of_phandle_args out_irq;
187 if (!parent || !parent->dev.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 platform_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);
212 static void bcma_of_fill_device(struct platform_device *parent,
213 struct bcma_device *core)
216 static inline unsigned int bcma_of_get_irq(struct platform_device *parent,
217 struct bcma_device *core, int num)
221 #endif /* CONFIG_OF */
223 unsigned int bcma_core_irq(struct bcma_device *core, int num)
225 struct bcma_bus *bus = core->bus;
226 unsigned int mips_irq;
228 switch (bus->hosttype) {
229 case BCMA_HOSTTYPE_PCI:
230 return bus->host_pci->irq;
231 case BCMA_HOSTTYPE_SOC:
232 if (bus->drv_mips.core && num == 0) {
233 mips_irq = bcma_core_mips_irq(core);
234 return mips_irq <= 4 ? mips_irq + 2 : 0;
237 return bcma_of_get_irq(bus->host_pdev, core, num);
239 case BCMA_HOSTTYPE_SDIO:
245 EXPORT_SYMBOL(bcma_core_irq);
247 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
249 core->dev.release = bcma_release_core_dev;
250 core->dev.bus = &bcma_bus_type;
251 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
253 switch (bus->hosttype) {
254 case BCMA_HOSTTYPE_PCI:
255 core->dev.parent = &bus->host_pci->dev;
256 core->dma_dev = &bus->host_pci->dev;
257 core->irq = bus->host_pci->irq;
259 case BCMA_HOSTTYPE_SOC:
260 core->dev.dma_mask = &core->dev.coherent_dma_mask;
261 if (bus->host_pdev) {
262 core->dma_dev = &bus->host_pdev->dev;
263 core->dev.parent = &bus->host_pdev->dev;
264 bcma_of_fill_device(bus->host_pdev, core);
266 core->dma_dev = &core->dev;
269 case BCMA_HOSTTYPE_SDIO:
274 struct device *bcma_bus_get_host_dev(struct bcma_bus *bus)
276 switch (bus->hosttype) {
277 case BCMA_HOSTTYPE_PCI:
279 return &bus->host_pci->dev;
282 case BCMA_HOSTTYPE_SOC:
284 return &bus->host_pdev->dev;
287 case BCMA_HOSTTYPE_SDIO:
289 return &bus->host_sdio->dev;
296 void bcma_init_bus(struct bcma_bus *bus)
298 mutex_lock(&bcma_buses_mutex);
299 bus->num = bcma_bus_next_num++;
300 mutex_unlock(&bcma_buses_mutex);
302 INIT_LIST_HEAD(&bus->cores);
305 bcma_detect_chip(bus);
308 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
312 err = device_register(&core->dev);
314 bcma_err(bus, "Could not register dev for core 0x%03X\n",
316 put_device(&core->dev);
319 core->dev_registered = true;
322 static int bcma_register_devices(struct bcma_bus *bus)
324 struct bcma_device *core;
327 list_for_each_entry(core, &bus->cores, list) {
328 /* We support that cores ourself */
329 switch (core->id.id) {
330 case BCMA_CORE_4706_CHIPCOMMON:
331 case BCMA_CORE_CHIPCOMMON:
332 case BCMA_CORE_NS_CHIPCOMMON_B:
335 case BCMA_CORE_PCIE2:
336 case BCMA_CORE_MIPS_74K:
337 case BCMA_CORE_4706_MAC_GBIT_COMMON:
341 /* Early cores were already registered */
342 if (bcma_is_core_needed_early(core->id.id))
345 /* Only first GMAC core on BCM4706 is connected and working */
346 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
350 bcma_register_core(bus, core);
353 #ifdef CONFIG_BCMA_DRIVER_MIPS
354 if (bus->drv_cc.pflash.present) {
355 err = platform_device_register(&bcma_pflash_dev);
357 bcma_err(bus, "Error registering parallel flash\n");
361 #ifdef CONFIG_BCMA_SFLASH
362 if (bus->drv_cc.sflash.present) {
363 err = platform_device_register(&bcma_sflash_dev);
365 bcma_err(bus, "Error registering serial flash\n");
369 #ifdef CONFIG_BCMA_NFLASH
370 if (bus->drv_cc.nflash.present) {
371 err = platform_device_register(&bcma_nflash_dev);
373 bcma_err(bus, "Error registering NAND flash\n");
376 err = bcma_gpio_init(&bus->drv_cc);
377 if (err == -ENOTSUPP)
378 bcma_debug(bus, "GPIO driver not activated\n");
380 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
382 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
383 err = bcma_chipco_watchdog_register(&bus->drv_cc);
385 bcma_err(bus, "Error registering watchdog driver\n");
391 void bcma_unregister_cores(struct bcma_bus *bus)
393 struct bcma_device *core, *tmp;
395 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
396 if (!core->dev_registered)
398 list_del(&core->list);
399 device_unregister(&core->dev);
401 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
402 platform_device_unregister(bus->drv_cc.watchdog);
404 /* Now noone uses internally-handled cores, we can free them */
405 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
406 list_del(&core->list);
411 int bcma_bus_register(struct bcma_bus *bus)
414 struct bcma_device *core;
417 /* Scan for devices (cores) */
418 err = bcma_bus_scan(bus);
420 bcma_err(bus, "Failed to scan: %d\n", err);
424 /* Early init CC core */
425 core = bcma_find_core(bus, bcma_cc_core_id(bus));
427 bus->drv_cc.core = core;
428 bcma_core_chipcommon_early_init(&bus->drv_cc);
431 /* Early init PCIE core */
432 core = bcma_find_core(bus, BCMA_CORE_PCIE);
434 bus->drv_pci[0].core = core;
435 bcma_core_pci_early_init(&bus->drv_pci[0]);
438 dev = bcma_bus_get_host_dev(bus);
439 /* TODO: remove check for IS_BUILTIN(CONFIG_BCMA) check when
440 * of_default_bus_match_table is exported or in some other way
441 * accessible. This is just a temporary workaround.
443 if (IS_BUILTIN(CONFIG_BCMA) && dev) {
444 of_platform_populate(dev->of_node, of_default_bus_match_table,
448 /* Cores providing flash access go before SPROM init */
449 list_for_each_entry(core, &bus->cores, list) {
450 if (bcma_is_core_needed_early(core->id.id))
451 bcma_register_core(bus, core);
454 /* Try to get SPROM */
455 err = bcma_sprom_get(bus);
456 if (err == -ENOENT) {
457 bcma_err(bus, "No SPROM available\n");
459 bcma_err(bus, "Failed to get SPROM: %d\n", err);
462 core = bcma_find_core(bus, bcma_cc_core_id(bus));
464 bus->drv_cc.core = core;
465 bcma_core_chipcommon_init(&bus->drv_cc);
469 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
471 bus->drv_cc_b.core = core;
472 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
476 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
478 bus->drv_mips.core = core;
479 bcma_core_mips_init(&bus->drv_mips);
483 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
485 bus->drv_pci[0].core = core;
486 bcma_core_pci_init(&bus->drv_pci[0]);
490 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
492 bus->drv_pci[1].core = core;
493 bcma_core_pci_init(&bus->drv_pci[1]);
496 /* Init PCIe Gen 2 core */
497 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
499 bus->drv_pcie2.core = core;
500 bcma_core_pcie2_init(&bus->drv_pcie2);
503 /* Init GBIT MAC COMMON core */
504 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
506 bus->drv_gmac_cmn.core = core;
507 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
510 /* Register found cores */
511 bcma_register_devices(bus);
513 bcma_info(bus, "Bus registered\n");
518 void bcma_bus_unregister(struct bcma_bus *bus)
522 err = bcma_gpio_unregister(&bus->drv_cc);
524 bcma_err(bus, "Some GPIOs are still in use.\n");
526 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
528 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
530 bcma_unregister_cores(bus);
534 * This is a special version of bus registration function designed for SoCs.
535 * It scans bus and performs basic initialization of main cores only.
536 * Please note it requires memory allocation, however it won't try to sleep.
538 int __init bcma_bus_early_register(struct bcma_bus *bus)
541 struct bcma_device *core;
543 /* Scan for devices (cores) */
544 err = bcma_bus_scan(bus);
546 bcma_err(bus, "Failed to scan bus: %d\n", err);
550 /* Early init CC core */
551 core = bcma_find_core(bus, bcma_cc_core_id(bus));
553 bus->drv_cc.core = core;
554 bcma_core_chipcommon_early_init(&bus->drv_cc);
557 /* Early init MIPS core */
558 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
560 bus->drv_mips.core = core;
561 bcma_core_mips_early_init(&bus->drv_mips);
564 bcma_info(bus, "Early bus registered\n");
570 int bcma_bus_suspend(struct bcma_bus *bus)
572 struct bcma_device *core;
574 list_for_each_entry(core, &bus->cores, list) {
575 struct device_driver *drv = core->dev.driver;
577 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
585 int bcma_bus_resume(struct bcma_bus *bus)
587 struct bcma_device *core;
590 if (bus->drv_cc.core) {
591 bus->drv_cc.setup_done = false;
592 bcma_core_chipcommon_init(&bus->drv_cc);
595 list_for_each_entry(core, &bus->cores, list) {
596 struct device_driver *drv = core->dev.driver;
598 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
608 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
610 drv->drv.name = drv->name;
611 drv->drv.bus = &bcma_bus_type;
612 drv->drv.owner = owner;
614 return driver_register(&drv->drv);
616 EXPORT_SYMBOL_GPL(__bcma_driver_register);
618 void bcma_driver_unregister(struct bcma_driver *drv)
620 driver_unregister(&drv->drv);
622 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
624 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
626 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
627 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
628 const struct bcma_device_id *cid = &core->id;
629 const struct bcma_device_id *did;
631 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
632 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
633 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
634 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
635 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
641 static int bcma_device_probe(struct device *dev)
643 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
644 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
649 err = adrv->probe(core);
654 static int bcma_device_remove(struct device *dev)
656 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
657 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
666 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
668 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
670 return add_uevent_var(env,
671 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
672 core->id.manuf, core->id.id,
673 core->id.rev, core->id.class);
676 static int __init bcma_modinit(void)
680 err = bus_register(&bcma_bus_type);
684 err = bcma_host_soc_register_driver();
686 pr_err("SoC host initialization failed\n");
689 #ifdef CONFIG_BCMA_HOST_PCI
690 err = bcma_host_pci_init();
692 pr_err("PCI host initialization failed\n");
699 fs_initcall(bcma_modinit);
701 static void __exit bcma_modexit(void)
703 #ifdef CONFIG_BCMA_HOST_PCI
704 bcma_host_pci_exit();
706 bcma_host_soc_unregister_driver();
707 bus_unregister(&bcma_bus_type);
709 module_exit(bcma_modexit)