x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / bcma / main.c
blob12da68ec48baa751d78899e89ac7da2e60f197f7
1 /*
2 * Broadcom specific AMBA
3 * Bus subsystem
5 * Licensed under the GNU/GPL. See COPYING for details.
6 */
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[] = {
62 &dev_attr_manuf.attr,
63 &dev_attr_id.attr,
64 &dev_attr_rev.attr,
65 &dev_attr_class.attr,
66 NULL,
68 ATTRIBUTE_GROUPS(bcma_device);
70 static struct bus_type bcma_bus_type = {
71 .name = "bcma",
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,
87 u8 unit)
89 struct bcma_device *core;
91 list_for_each_entry(core, &bus->cores, list) {
92 if (core->id.id == coreid && core->core_unit == unit)
93 return core;
95 return NULL;
97 EXPORT_SYMBOL_GPL(bcma_find_core_unit);
99 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
100 int timeout)
102 unsigned long deadline = jiffies + timeout;
103 u32 val;
105 do {
106 val = bcma_read32(core, reg);
107 if ((val & mask) == value)
108 return true;
109 cpu_relax();
110 udelay(10);
111 } while (!time_after_eq(jiffies, deadline));
113 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
115 return false;
118 static void bcma_release_core_dev(struct device *dev)
120 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
121 if (core->io_addr)
122 iounmap(core->io_addr);
123 if (core->io_wrap)
124 iounmap(core->io_wrap);
125 kfree(core);
128 static bool bcma_is_core_needed_early(u16 core_id)
130 switch (core_id) {
131 case BCMA_CORE_NS_NAND:
132 case BCMA_CORE_NS_QSPI:
133 return true;
136 return false;
139 static struct device_node *bcma_of_find_child_device(struct device *parent,
140 struct bcma_device *core)
142 struct device_node *node;
143 u64 size;
144 const __be32 *reg;
146 if (!parent->of_node)
147 return NULL;
149 for_each_child_of_node(parent->of_node, node) {
150 reg = of_get_address(node, 0, &size, NULL);
151 if (!reg)
152 continue;
153 if (of_translate_address(node, reg) == core->addr)
154 return node;
156 return NULL;
159 static int bcma_of_irq_parse(struct device *parent,
160 struct bcma_device *core,
161 struct of_phandle_args *out_irq, int num)
163 __be32 laddr[1];
164 int rc;
166 if (core->dev.of_node) {
167 rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
168 if (!rc)
169 return rc;
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;
184 int ret;
186 if (!IS_ENABLED(CONFIG_OF_IRQ) || !parent->of_node)
187 return 0;
189 ret = bcma_of_irq_parse(parent, core, &out_irq, num);
190 if (ret) {
191 bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
192 ret);
193 return 0;
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 if (!IS_ENABLED(CONFIG_OF_IRQ))
205 return;
207 node = bcma_of_find_child_device(parent, core);
208 if (node)
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;
229 if (bus->host_pdev)
230 return bcma_of_get_irq(&bus->host_pdev->dev, core, num);
231 return 0;
232 case BCMA_HOSTTYPE_SDIO:
233 return 0;
236 return 0;
238 EXPORT_SYMBOL(bcma_core_irq);
240 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
242 core->dev.release = bcma_release_core_dev;
243 core->dev.bus = &bcma_bus_type;
244 dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
246 switch (bus->hosttype) {
247 case BCMA_HOSTTYPE_PCI:
248 core->dev.parent = &bus->host_pci->dev;
249 core->dma_dev = &bus->host_pci->dev;
250 core->irq = bus->host_pci->irq;
251 break;
252 case BCMA_HOSTTYPE_SOC:
253 if (IS_ENABLED(CONFIG_OF) && bus->host_pdev) {
254 core->dma_dev = &bus->host_pdev->dev;
255 core->dev.parent = &bus->host_pdev->dev;
256 if (core->dev.parent)
257 bcma_of_fill_device(core->dev.parent, core);
258 } else {
259 core->dev.dma_mask = &core->dev.coherent_dma_mask;
260 core->dma_dev = &core->dev;
262 break;
263 case BCMA_HOSTTYPE_SDIO:
264 break;
268 struct device *bcma_bus_get_host_dev(struct bcma_bus *bus)
270 switch (bus->hosttype) {
271 case BCMA_HOSTTYPE_PCI:
272 if (bus->host_pci)
273 return &bus->host_pci->dev;
274 else
275 return NULL;
276 case BCMA_HOSTTYPE_SOC:
277 if (bus->host_pdev)
278 return &bus->host_pdev->dev;
279 else
280 return NULL;
281 case BCMA_HOSTTYPE_SDIO:
282 if (bus->host_sdio)
283 return &bus->host_sdio->dev;
284 else
285 return NULL;
287 return NULL;
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);
297 bus->nr_cores = 0;
299 bcma_detect_chip(bus);
302 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
304 int err;
306 err = device_register(&core->dev);
307 if (err) {
308 bcma_err(bus, "Could not register dev for core 0x%03X\n",
309 core->id.id);
310 put_device(&core->dev);
311 return;
313 core->dev_registered = true;
316 static int bcma_register_devices(struct bcma_bus *bus)
318 struct bcma_device *core;
319 int err;
321 list_for_each_entry(core, &bus->cores, list) {
322 /* We support that cores ourself */
323 switch (core->id.id) {
324 case BCMA_CORE_4706_CHIPCOMMON:
325 case BCMA_CORE_CHIPCOMMON:
326 case BCMA_CORE_NS_CHIPCOMMON_B:
327 case BCMA_CORE_PCI:
328 case BCMA_CORE_PCIE:
329 case BCMA_CORE_PCIE2:
330 case BCMA_CORE_MIPS_74K:
331 case BCMA_CORE_4706_MAC_GBIT_COMMON:
332 continue;
335 /* Early cores were already registered */
336 if (bcma_is_core_needed_early(core->id.id))
337 continue;
339 /* Only first GMAC core on BCM4706 is connected and working */
340 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
341 core->core_unit > 0)
342 continue;
344 bcma_register_core(bus, core);
347 #ifdef CONFIG_BCMA_PFLASH
348 if (bus->drv_cc.pflash.present) {
349 err = platform_device_register(&bcma_pflash_dev);
350 if (err)
351 bcma_err(bus, "Error registering parallel flash\n");
353 #endif
355 #ifdef CONFIG_BCMA_SFLASH
356 if (bus->drv_cc.sflash.present) {
357 err = platform_device_register(&bcma_sflash_dev);
358 if (err)
359 bcma_err(bus, "Error registering serial flash\n");
361 #endif
363 #ifdef CONFIG_BCMA_NFLASH
364 if (bus->drv_cc.nflash.present) {
365 err = platform_device_register(&bcma_nflash_dev);
366 if (err)
367 bcma_err(bus, "Error registering NAND flash\n");
369 #endif
370 err = bcma_gpio_init(&bus->drv_cc);
371 if (err == -ENOTSUPP)
372 bcma_debug(bus, "GPIO driver not activated\n");
373 else if (err)
374 bcma_err(bus, "Error registering GPIO driver: %i\n", err);
376 if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
377 err = bcma_chipco_watchdog_register(&bus->drv_cc);
378 if (err)
379 bcma_err(bus, "Error registering watchdog driver\n");
382 return 0;
385 void bcma_unregister_cores(struct bcma_bus *bus)
387 struct bcma_device *core, *tmp;
389 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
390 if (!core->dev_registered)
391 continue;
392 list_del(&core->list);
393 device_unregister(&core->dev);
395 if (bus->hosttype == BCMA_HOSTTYPE_SOC)
396 platform_device_unregister(bus->drv_cc.watchdog);
398 /* Now noone uses internally-handled cores, we can free them */
399 list_for_each_entry_safe(core, tmp, &bus->cores, list) {
400 list_del(&core->list);
401 kfree(core);
405 int bcma_bus_register(struct bcma_bus *bus)
407 int err;
408 struct bcma_device *core;
409 struct device *dev;
411 /* Scan for devices (cores) */
412 err = bcma_bus_scan(bus);
413 if (err) {
414 bcma_err(bus, "Failed to scan: %d\n", err);
415 return err;
418 /* Early init CC core */
419 core = bcma_find_core(bus, bcma_cc_core_id(bus));
420 if (core) {
421 bus->drv_cc.core = core;
422 bcma_core_chipcommon_early_init(&bus->drv_cc);
425 /* Early init PCIE core */
426 core = bcma_find_core(bus, BCMA_CORE_PCIE);
427 if (core) {
428 bus->drv_pci[0].core = core;
429 bcma_core_pci_early_init(&bus->drv_pci[0]);
432 dev = bcma_bus_get_host_dev(bus);
433 if (dev) {
434 of_platform_default_populate(dev->of_node, NULL, dev);
437 /* Cores providing flash access go before SPROM init */
438 list_for_each_entry(core, &bus->cores, list) {
439 if (bcma_is_core_needed_early(core->id.id))
440 bcma_register_core(bus, core);
443 /* Try to get SPROM */
444 err = bcma_sprom_get(bus);
445 if (err == -ENOENT) {
446 bcma_err(bus, "No SPROM available\n");
447 } else if (err)
448 bcma_err(bus, "Failed to get SPROM: %d\n", err);
450 /* Init CC core */
451 core = bcma_find_core(bus, bcma_cc_core_id(bus));
452 if (core) {
453 bus->drv_cc.core = core;
454 bcma_core_chipcommon_init(&bus->drv_cc);
457 /* Init CC core */
458 core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
459 if (core) {
460 bus->drv_cc_b.core = core;
461 bcma_core_chipcommon_b_init(&bus->drv_cc_b);
464 /* Init MIPS core */
465 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
466 if (core) {
467 bus->drv_mips.core = core;
468 bcma_core_mips_init(&bus->drv_mips);
471 /* Init PCIE core */
472 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
473 if (core) {
474 bus->drv_pci[0].core = core;
475 bcma_core_pci_init(&bus->drv_pci[0]);
478 /* Init PCIE core */
479 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
480 if (core) {
481 bus->drv_pci[1].core = core;
482 bcma_core_pci_init(&bus->drv_pci[1]);
485 /* Init PCIe Gen 2 core */
486 core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
487 if (core) {
488 bus->drv_pcie2.core = core;
489 bcma_core_pcie2_init(&bus->drv_pcie2);
492 /* Init GBIT MAC COMMON core */
493 core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
494 if (core) {
495 bus->drv_gmac_cmn.core = core;
496 bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
499 /* Register found cores */
500 bcma_register_devices(bus);
502 bcma_info(bus, "Bus registered\n");
504 return 0;
507 void bcma_bus_unregister(struct bcma_bus *bus)
509 int err;
511 err = bcma_gpio_unregister(&bus->drv_cc);
512 if (err == -EBUSY)
513 bcma_err(bus, "Some GPIOs are still in use.\n");
514 else if (err)
515 bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
517 bcma_core_chipcommon_b_free(&bus->drv_cc_b);
519 bcma_unregister_cores(bus);
523 * This is a special version of bus registration function designed for SoCs.
524 * It scans bus and performs basic initialization of main cores only.
525 * Please note it requires memory allocation, however it won't try to sleep.
527 int __init bcma_bus_early_register(struct bcma_bus *bus)
529 int err;
530 struct bcma_device *core;
532 /* Scan for devices (cores) */
533 err = bcma_bus_scan(bus);
534 if (err) {
535 bcma_err(bus, "Failed to scan bus: %d\n", err);
536 return -1;
539 /* Early init CC core */
540 core = bcma_find_core(bus, bcma_cc_core_id(bus));
541 if (core) {
542 bus->drv_cc.core = core;
543 bcma_core_chipcommon_early_init(&bus->drv_cc);
546 /* Early init MIPS core */
547 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
548 if (core) {
549 bus->drv_mips.core = core;
550 bcma_core_mips_early_init(&bus->drv_mips);
553 bcma_info(bus, "Early bus registered\n");
555 return 0;
558 #ifdef CONFIG_PM
559 int bcma_bus_suspend(struct bcma_bus *bus)
561 struct bcma_device *core;
563 list_for_each_entry(core, &bus->cores, list) {
564 struct device_driver *drv = core->dev.driver;
565 if (drv) {
566 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
567 if (adrv->suspend)
568 adrv->suspend(core);
571 return 0;
574 int bcma_bus_resume(struct bcma_bus *bus)
576 struct bcma_device *core;
578 /* Init CC core */
579 if (bus->drv_cc.core) {
580 bus->drv_cc.setup_done = false;
581 bcma_core_chipcommon_init(&bus->drv_cc);
584 list_for_each_entry(core, &bus->cores, list) {
585 struct device_driver *drv = core->dev.driver;
586 if (drv) {
587 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
588 if (adrv->resume)
589 adrv->resume(core);
593 return 0;
595 #endif
597 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
599 drv->drv.name = drv->name;
600 drv->drv.bus = &bcma_bus_type;
601 drv->drv.owner = owner;
603 return driver_register(&drv->drv);
605 EXPORT_SYMBOL_GPL(__bcma_driver_register);
607 void bcma_driver_unregister(struct bcma_driver *drv)
609 driver_unregister(&drv->drv);
611 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
613 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
615 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
616 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
617 const struct bcma_device_id *cid = &core->id;
618 const struct bcma_device_id *did;
620 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
621 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
622 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
623 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
624 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
625 return 1;
627 return 0;
630 static int bcma_device_probe(struct device *dev)
632 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
633 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
634 drv);
635 int err = 0;
637 get_device(dev);
638 if (adrv->probe)
639 err = adrv->probe(core);
640 if (err)
641 put_device(dev);
643 return err;
646 static int bcma_device_remove(struct device *dev)
648 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
649 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
650 drv);
652 if (adrv->remove)
653 adrv->remove(core);
654 put_device(dev);
656 return 0;
659 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
661 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
663 return add_uevent_var(env,
664 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
665 core->id.manuf, core->id.id,
666 core->id.rev, core->id.class);
669 static unsigned int bcma_bus_registered;
672 * If built-in, bus has to be registered early, before any driver calls
673 * bcma_driver_register.
674 * Otherwise registering driver would trigger BUG in driver_register.
676 static int __init bcma_init_bus_register(void)
678 int err;
680 if (bcma_bus_registered)
681 return 0;
683 err = bus_register(&bcma_bus_type);
684 if (!err)
685 bcma_bus_registered = 1;
687 return err;
689 #ifndef MODULE
690 fs_initcall(bcma_init_bus_register);
691 #endif
693 /* Main initialization has to be done with SPI/mtd/NAND/SPROM available */
694 static int __init bcma_modinit(void)
696 int err;
698 err = bcma_init_bus_register();
699 if (err)
700 return err;
702 err = bcma_host_soc_register_driver();
703 if (err) {
704 pr_err("SoC host initialization failed\n");
705 err = 0;
707 #ifdef CONFIG_BCMA_HOST_PCI
708 err = bcma_host_pci_init();
709 if (err) {
710 pr_err("PCI host initialization failed\n");
711 err = 0;
713 #endif
715 return err;
717 module_init(bcma_modinit);
719 static void __exit bcma_modexit(void)
721 #ifdef CONFIG_BCMA_HOST_PCI
722 bcma_host_pci_exit();
723 #endif
724 bcma_host_soc_unregister_driver();
725 bus_unregister(&bcma_bus_type);
727 module_exit(bcma_modexit)