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/platform_device.h>
11 #include <linux/bcma/bcma.h>
12 #include <linux/slab.h>
13 #include <linux/of_address.h>
14 #include <linux/of_irq.h>
16 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
17 MODULE_LICENSE("GPL");
19 /* contains the number the next bus should get. */
20 static unsigned int bcma_bus_next_num = 0;
22 /* bcma_buses_mutex locks the bcma_bus_next_num */
23 static DEFINE_MUTEX(bcma_buses_mutex);
25 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
26 static int bcma_device_probe(struct device *dev);
27 static int bcma_device_remove(struct device *dev);
28 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
30 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
32 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
33 return sprintf(buf, "0x%03X\n", core->id.manuf);
35 static DEVICE_ATTR_RO(manuf);
37 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
39 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
40 return sprintf(buf, "0x%03X\n", core->id.id);
42 static DEVICE_ATTR_RO(id);
44 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
46 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
47 return sprintf(buf, "0x%02X\n", core->id.rev);
49 static DEVICE_ATTR_RO(rev);
51 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
53 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
54 return sprintf(buf, "0x%X\n", core->id.class);
56 static DEVICE_ATTR_RO(class);
58 static struct attribute *bcma_device_attrs[] = {
65 ATTRIBUTE_GROUPS(bcma_device);
67 static struct bus_type bcma_bus_type = {
69 .match = bcma_bus_match,
70 .probe = bcma_device_probe,
71 .remove = bcma_device_remove,
72 .uevent = bcma_device_uevent,
73 .dev_groups = bcma_device_groups,
76 static u16 bcma_cc_core_id(struct bcma_bus *bus)
78 if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
79 return BCMA_CORE_4706_CHIPCOMMON;
80 return BCMA_CORE_CHIPCOMMON;
83 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
86 struct bcma_device *core;
88 list_for_each_entry(core, &bus->cores, list) {
89 if (core->id.id == coreid && core->core_unit == unit)
94 EXPORT_SYMBOL_GPL(bcma_find_core_unit);
96 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
99 unsigned long deadline = jiffies + timeout;
103 val = bcma_read32(core, reg);
104 if ((val & mask) == value)
108 } while (!time_after_eq(jiffies, deadline));
110 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
115 static void bcma_release_core_dev(struct device *dev)
117 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
119 iounmap(core->io_addr);
121 iounmap(core->io_wrap);
125 static bool bcma_is_core_needed_early(u16 core_id)
128 case BCMA_CORE_NS_NAND:
129 case BCMA_CORE_NS_QSPI:
136 #if defined(CONFIG_OF) && defined(CONFIG_OF_ADDRESS)
137 static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
138 struct bcma_device *core)
140 struct device_node *node;
144 if (!parent || !parent->dev.of_node)
147 for_each_child_of_node(parent->dev.of_node, node) {
148 reg = of_get_address(node, 0, &size, NULL);
151 if (of_translate_address(node, reg) == core->addr)
157 static int bcma_of_irq_parse(struct platform_device *parent,
158 struct bcma_device *core,
159 struct of_phandle_args *out_irq, int num)
164 if (core->dev.of_node) {
165 rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
170 out_irq->np = parent->dev.of_node;
171 out_irq->args_count = 1;
172 out_irq->args[0] = num;
174 laddr[0] = cpu_to_be32(core->addr);
175 return of_irq_parse_raw(laddr, out_irq);
178 static unsigned int bcma_of_get_irq(struct platform_device *parent,
179 struct bcma_device *core, int num)
181 struct of_phandle_args out_irq;
184 if (!parent || !parent->dev.of_node)
187 ret = bcma_of_irq_parse(parent, core, &out_irq, num);
189 bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
194 return irq_create_of_mapping(&out_irq);
197 static void bcma_of_fill_device(struct platform_device *parent,
198 struct bcma_device *core)
200 struct device_node *node;
202 node = bcma_of_find_child_device(parent, core);
204 core->dev.of_node = node;
206 core->irq = bcma_of_get_irq(parent, core, 0);
209 static void bcma_of_fill_device(struct platform_device *parent,
210 struct bcma_device *core)
213 static inline unsigned int bcma_of_get_irq(struct platform_device *parent,
214 struct bcma_device *core, int num)
218 #endif /* CONFIG_OF */
220 unsigned int bcma_core_irq(struct bcma_device *core, int num)
222 struct bcma_bus *bus = core->bus;
223 unsigned int mips_irq;
225 switch (bus->hosttype) {
226 case BCMA_HOSTTYPE_PCI:
227 return bus->host_pci->irq;
228 case BCMA_HOSTTYPE_SOC:
229 if (bus->drv_mips.core && num == 0) {
230 mips_irq = bcma_core_mips_irq(core);
231 return mips_irq <= 4 ? mips_irq + 2 : 0;
234 return bcma_of_get_irq(bus->host_pdev, core, num);
236 case BCMA_HOSTTYPE_SDIO:
242 EXPORT_SYMBOL(bcma_core_irq);
244 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
246 core->dev.release = bcma_release_core_dev;
247 core->dev.bus = &bcma_bus_type;
248 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
250 switch (bus->hosttype) {
251 case BCMA_HOSTTYPE_PCI:
252 core->dev.parent = &bus->host_pci->dev;
253 core->dma_dev = &bus->host_pci->dev;
254 core->irq = bus->host_pci->irq;
256 case BCMA_HOSTTYPE_SOC:
257 core->dev.dma_mask = &core->dev.coherent_dma_mask;
258 if (bus->host_pdev) {
259 core->dma_dev = &bus->host_pdev->dev;
260 core->dev.parent = &bus->host_pdev->dev;
261 bcma_of_fill_device(bus->host_pdev, core);
263 core->dma_dev = &core->dev;
266 case BCMA_HOSTTYPE_SDIO:
271 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
275 err = device_register(&core->dev);
277 bcma_err(bus, "Could not register dev for core 0x%03X\n",
279 put_device(&core->dev);
282 core->dev_registered = true;
285 static int bcma_register_devices(struct bcma_bus *bus)
287 struct bcma_device *core;
290 list_for_each_entry(core, &bus->cores, list) {
291 /* We support that cores ourself */
292 switch (core->id.id) {
293 case BCMA_CORE_4706_CHIPCOMMON:
294 case BCMA_CORE_CHIPCOMMON:
295 case BCMA_CORE_NS_CHIPCOMMON_B:
298 case BCMA_CORE_PCIE2:
299 case BCMA_CORE_MIPS_74K:
300 case BCMA_CORE_4706_MAC_GBIT_COMMON:
304 /* Early cores were already registered */
305 if (bcma_is_core_needed_early(core->id.id))
308 /* Only first GMAC core on BCM4706 is connected and working */
309 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
313 bcma_register_core(bus, core);
316 #ifdef CONFIG_BCMA_DRIVER_MIPS
317 if (bus->drv_cc.pflash.present) {
318 err = platform_device_register(&bcma_pflash_dev);
320 bcma_err(bus, "Error registering parallel flash\n");
324 #ifdef CONFIG_BCMA_SFLASH
325 if (bus->drv_cc.sflash.present) {
326 err = platform_device_register(&bcma_sflash_dev);
328 bcma_err(bus, "Error registering serial flash\n");
332 #ifdef CONFIG_BCMA_NFLASH
333 if (bus->drv_cc.nflash.present) {
334 err = platform_device_register(&bcma_nflash_dev);
336 bcma_err(bus, "Error registering NAND flash\n");
339 err = bcma_gpio_init(&bus->drv_cc);
340 if (err == -ENOTSUPP)
341 bcma_debug(bus, "GPIO driver not activated\n");
343 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
345 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
346 err = bcma_chipco_watchdog_register(&bus->drv_cc);
348 bcma_err(bus, "Error registering watchdog driver\n");
354 static void bcma_unregister_cores(struct bcma_bus *bus)
356 struct bcma_device *core, *tmp;
358 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
359 list_del(&core->list);
360 if (core->dev_registered)
361 device_unregister(&core->dev);
363 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
364 platform_device_unregister(bus->drv_cc.watchdog);
367 int bcma_bus_register(struct bcma_bus *bus)
370 struct bcma_device *core;
372 mutex_lock(&bcma_buses_mutex);
373 bus->num = bcma_bus_next_num++;
374 mutex_unlock(&bcma_buses_mutex);
376 /* Scan for devices (cores) */
377 err = bcma_bus_scan(bus);
379 bcma_err(bus, "Failed to scan: %d\n", err);
383 /* Early init CC core */
384 core = bcma_find_core(bus, bcma_cc_core_id(bus));
386 bus->drv_cc.core = core;
387 bcma_core_chipcommon_early_init(&bus->drv_cc);
390 /* Cores providing flash access go before SPROM init */
391 list_for_each_entry(core, &bus->cores, list) {
392 if (bcma_is_core_needed_early(core->id.id))
393 bcma_register_core(bus, core);
396 /* Try to get SPROM */
397 err = bcma_sprom_get(bus);
398 if (err == -ENOENT) {
399 bcma_err(bus, "No SPROM available\n");
401 bcma_err(bus, "Failed to get SPROM: %d\n", err);
404 core = bcma_find_core(bus, bcma_cc_core_id(bus));
406 bus->drv_cc.core = core;
407 bcma_core_chipcommon_init(&bus->drv_cc);
411 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
413 bus->drv_cc_b.core = core;
414 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
418 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
420 bus->drv_mips.core = core;
421 bcma_core_mips_init(&bus->drv_mips);
425 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
427 bus->drv_pci[0].core = core;
428 bcma_core_pci_init(&bus->drv_pci[0]);
432 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
434 bus->drv_pci[1].core = core;
435 bcma_core_pci_init(&bus->drv_pci[1]);
438 /* Init PCIe Gen 2 core */
439 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
441 bus->drv_pcie2.core = core;
442 bcma_core_pcie2_init(&bus->drv_pcie2);
445 /* Init GBIT MAC COMMON core */
446 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
448 bus->drv_gmac_cmn.core = core;
449 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
452 /* Register found cores */
453 bcma_register_devices(bus);
455 bcma_info(bus, "Bus registered\n");
460 void bcma_bus_unregister(struct bcma_bus *bus)
462 struct bcma_device *cores[3];
465 err = bcma_gpio_unregister(&bus->drv_cc);
467 bcma_err(bus, "Some GPIOs are still in use.\n");
469 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
471 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
473 cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
474 cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);
475 cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
477 bcma_unregister_cores(bus);
484 int __init bcma_bus_early_register(struct bcma_bus *bus,
485 struct bcma_device *core_cc,
486 struct bcma_device *core_mips)
489 struct bcma_device *core;
490 struct bcma_device_id match;
492 match.manuf = BCMA_MANUF_BCM;
493 match.id = bcma_cc_core_id(bus);
494 match.class = BCMA_CL_SIM;
495 match.rev = BCMA_ANY_REV;
497 /* Scan for chip common core */
498 err = bcma_bus_scan_early(bus, &match, core_cc);
500 bcma_err(bus, "Failed to scan for common core: %d\n", err);
504 match.manuf = BCMA_MANUF_MIPS;
505 match.id = BCMA_CORE_MIPS_74K;
506 match.class = BCMA_CL_SIM;
507 match.rev = BCMA_ANY_REV;
509 /* Scan for mips core */
510 err = bcma_bus_scan_early(bus, &match, core_mips);
512 bcma_err(bus, "Failed to scan for mips core: %d\n", err);
516 /* Early init CC core */
517 core = bcma_find_core(bus, bcma_cc_core_id(bus));
519 bus->drv_cc.core = core;
520 bcma_core_chipcommon_early_init(&bus->drv_cc);
523 /* Early init MIPS core */
524 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
526 bus->drv_mips.core = core;
527 bcma_core_mips_early_init(&bus->drv_mips);
530 bcma_info(bus, "Early bus registered\n");
536 int bcma_bus_suspend(struct bcma_bus *bus)
538 struct bcma_device *core;
540 list_for_each_entry(core, &bus->cores, list) {
541 struct device_driver *drv = core->dev.driver;
543 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
551 int bcma_bus_resume(struct bcma_bus *bus)
553 struct bcma_device *core;
556 if (bus->drv_cc.core) {
557 bus->drv_cc.setup_done = false;
558 bcma_core_chipcommon_init(&bus->drv_cc);
561 list_for_each_entry(core, &bus->cores, list) {
562 struct device_driver *drv = core->dev.driver;
564 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
574 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
576 drv->drv.name = drv->name;
577 drv->drv.bus = &bcma_bus_type;
578 drv->drv.owner = owner;
580 return driver_register(&drv->drv);
582 EXPORT_SYMBOL_GPL(__bcma_driver_register);
584 void bcma_driver_unregister(struct bcma_driver *drv)
586 driver_unregister(&drv->drv);
588 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
590 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
592 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
593 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
594 const struct bcma_device_id *cid = &core->id;
595 const struct bcma_device_id *did;
597 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
598 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
599 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
600 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
601 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
607 static int bcma_device_probe(struct device *dev)
609 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
610 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
615 err = adrv->probe(core);
620 static int 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,
632 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
634 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
636 return add_uevent_var(env,
637 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
638 core->id.manuf, core->id.id,
639 core->id.rev, core->id.class);
642 static int __init bcma_modinit(void)
646 err = bus_register(&bcma_bus_type);
650 err = bcma_host_soc_register_driver();
652 pr_err("SoC host initialization failed\n");
655 #ifdef CONFIG_BCMA_HOST_PCI
656 err = bcma_host_pci_init();
658 pr_err("PCI host initialization failed\n");
665 fs_initcall(bcma_modinit);
667 static void __exit bcma_modexit(void)
669 #ifdef CONFIG_BCMA_HOST_PCI
670 bcma_host_pci_exit();
672 bcma_host_soc_unregister_driver();
673 bus_unregister(&bcma_bus_type);
675 module_exit(bcma_modexit)