drivers/bcma/main.c - kernel/msm-4.19 - Gitiles

 /*
  * Broadcom specific AMBA
  * Bus subsystem
  *
  * Licensed under the GNU/GPL. See COPYING for details.
  */

 #include "bcma_private.h"
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/bcma/bcma.h>
 #include <linux/slab.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>

 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
 MODULE_LICENSE("GPL");

 /* contains the number the next bus should get. */
 static unsigned int bcma_bus_next_num = 0;

 /* bcma_buses_mutex locks the bcma_bus_next_num */
 static DEFINE_MUTEX(bcma_buses_mutex);

 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
 static int bcma_device_probe(struct device *dev);
 static int bcma_device_remove(struct device *dev);
 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);

 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	return sprintf(buf, "0x%03X\n", core->id.manuf);
 }
 static DEVICE_ATTR_RO(manuf);

 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	return sprintf(buf, "0x%03X\n", core->id.id);
 }
 static DEVICE_ATTR_RO(id);

 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	return sprintf(buf, "0x%02X\n", core->id.rev);
 }
 static DEVICE_ATTR_RO(rev);

 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	return sprintf(buf, "0x%X\n", core->id.class);
 }
 static DEVICE_ATTR_RO(class);

 static struct attribute *bcma_device_attrs[] = {
 	&dev_attr_manuf.attr,
 	&dev_attr_id.attr,
 	&dev_attr_rev.attr,
 	&dev_attr_class.attr,
 	NULL,
 };
 ATTRIBUTE_GROUPS(bcma_device);

 static struct bus_type bcma_bus_type = {
 	.name		= "bcma",
 	.match		= bcma_bus_match,
 	.probe		= bcma_device_probe,
 	.remove		= bcma_device_remove,
 	.uevent		= bcma_device_uevent,
 	.dev_groups	= bcma_device_groups,
 };

 static u16 bcma_cc_core_id(struct bcma_bus *bus)
 {
 	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
 		return BCMA_CORE_4706_CHIPCOMMON;
 	return BCMA_CORE_CHIPCOMMON;
 }

 struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
 					u8 unit)
 {
 	struct bcma_device *core;

 	list_for_each_entry(core, &bus->cores, list) {
 		if (core->id.id == coreid && core->core_unit == unit)
 			return core;
 	}
 	return NULL;
 }
 EXPORT_SYMBOL_GPL(bcma_find_core_unit);

 bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
 		     int timeout)
 {
 	unsigned long deadline = jiffies + timeout;
 	u32 val;

 	do {
 		val = bcma_read32(core, reg);
 		if ((val & mask) == value)
 			return true;
 		cpu_relax();
 		udelay(10);
 	} while (!time_after_eq(jiffies, deadline));

 	bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);

 	return false;
 }

 static void bcma_release_core_dev(struct device *dev)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	if (core->io_addr)
 		iounmap(core->io_addr);
 	if (core->io_wrap)
 		iounmap(core->io_wrap);
 	kfree(core);
 }

 static bool bcma_is_core_needed_early(u16 core_id)
 {
 	switch (core_id) {
 	case BCMA_CORE_NS_NAND:
 	case BCMA_CORE_NS_QSPI:
 		return true;
 	}

 	return false;
 }

 #if defined(CONFIG_OF) && defined(CONFIG_OF_ADDRESS)
 static struct device_node *bcma_of_find_child_device(struct platform_device *parent,
 						     struct bcma_device *core)
 {
 	struct device_node *node;
 	u64 size;
 	const __be32 *reg;

 	if (!parent || !parent->dev.of_node)
 		return NULL;

 	for_each_child_of_node(parent->dev.of_node, node) {
 		reg = of_get_address(node, 0, &size, NULL);
 		if (!reg)
 			continue;
 		if (of_translate_address(node, reg) == core->addr)
 			return node;
 	}
 	return NULL;
 }

 static int bcma_of_irq_parse(struct platform_device *parent,
 			     struct bcma_device *core,
 			     struct of_phandle_args *out_irq, int num)
 {
 	__be32 laddr[1];
 	int rc;

 	if (core->dev.of_node) {
 		rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
 		if (!rc)
 			return rc;
 	}

 	out_irq->np = parent->dev.of_node;
 	out_irq->args_count = 1;
 	out_irq->args[0] = num;

 	laddr[0] = cpu_to_be32(core->addr);
 	return of_irq_parse_raw(laddr, out_irq);
 }

 static unsigned int bcma_of_get_irq(struct platform_device *parent,
 				    struct bcma_device *core, int num)
 {
 	struct of_phandle_args out_irq;
 	int ret;

 	if (!parent || !parent->dev.of_node)
 		return 0;

 	ret = bcma_of_irq_parse(parent, core, &out_irq, num);
 	if (ret) {
 		bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
 			   ret);
 		return 0;
 	}

 	return irq_create_of_mapping(&out_irq);
 }

 static void bcma_of_fill_device(struct platform_device *parent,
 				struct bcma_device *core)
 {
 	struct device_node *node;

 	node = bcma_of_find_child_device(parent, core);
 	if (node)
 		core->dev.of_node = node;

 	core->irq = bcma_of_get_irq(parent, core, 0);
 }
 #else
 static void bcma_of_fill_device(struct platform_device *parent,
 				struct bcma_device *core)
 {
 }
 static inline unsigned int bcma_of_get_irq(struct platform_device *parent,
 					   struct bcma_device *core, int num)
 {
 	return 0;
 }
 #endif /* CONFIG_OF */

 unsigned int bcma_core_irq(struct bcma_device *core, int num)
 {
 	struct bcma_bus *bus = core->bus;
 	unsigned int mips_irq;

 	switch (bus->hosttype) {
 	case BCMA_HOSTTYPE_PCI:
 		return bus->host_pci->irq;
 	case BCMA_HOSTTYPE_SOC:
 		if (bus->drv_mips.core && num == 0) {
 			mips_irq = bcma_core_mips_irq(core);
 			return mips_irq <= 4 ? mips_irq + 2 : 0;
 		}
 		if (bus->host_pdev)
 			return bcma_of_get_irq(bus->host_pdev, core, num);
 		return 0;
 	case BCMA_HOSTTYPE_SDIO:
 		return 0;
 	}

 	return 0;
 }
 EXPORT_SYMBOL(bcma_core_irq);

 void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
 {
 	core->dev.release = bcma_release_core_dev;
 	core->dev.bus = &bcma_bus_type;
 	dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);

 	switch (bus->hosttype) {
 	case BCMA_HOSTTYPE_PCI:
 		core->dev.parent = &bus->host_pci->dev;
 		core->dma_dev = &bus->host_pci->dev;
 		core->irq = bus->host_pci->irq;
 		break;
 	case BCMA_HOSTTYPE_SOC:
 		core->dev.dma_mask = &core->dev.coherent_dma_mask;
 		if (bus->host_pdev) {
 			core->dma_dev = &bus->host_pdev->dev;
 			core->dev.parent = &bus->host_pdev->dev;
 			bcma_of_fill_device(bus->host_pdev, core);
 		} else {
 			core->dma_dev = &core->dev;
 		}
 		break;
 	case BCMA_HOSTTYPE_SDIO:
 		break;
 	}
 }

 void bcma_init_bus(struct bcma_bus *bus)
 {
 	mutex_lock(&bcma_buses_mutex);
 	bus->num = bcma_bus_next_num++;
 	mutex_unlock(&bcma_buses_mutex);

 	INIT_LIST_HEAD(&bus->cores);
 	bus->nr_cores = 0;

 	bcma_detect_chip(bus);
 }

 static void bcma_register_core(struct bcma_bus *bus, struct bcma_device *core)
 {
 	int err;

 	err = device_register(&core->dev);
 	if (err) {
 		bcma_err(bus, "Could not register dev for core 0x%03X\n",
 			 core->id.id);
 		put_device(&core->dev);
 		return;
 	}
 	core->dev_registered = true;
 }

 static int bcma_register_devices(struct bcma_bus *bus)
 {
 	struct bcma_device *core;
 	int err;

 	list_for_each_entry(core, &bus->cores, list) {
 		/* We support that cores ourself */
 		switch (core->id.id) {
 		case BCMA_CORE_4706_CHIPCOMMON:
 		case BCMA_CORE_CHIPCOMMON:
 		case BCMA_CORE_NS_CHIPCOMMON_B:
 		case BCMA_CORE_PCI:
 		case BCMA_CORE_PCIE:
 		case BCMA_CORE_PCIE2:
 		case BCMA_CORE_MIPS_74K:
 		case BCMA_CORE_4706_MAC_GBIT_COMMON:
 			continue;
 		}

 		/* Early cores were already registered */
 		if (bcma_is_core_needed_early(core->id.id))
 			continue;

 		/* Only first GMAC core on BCM4706 is connected and working */
 		if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
 		    core->core_unit > 0)
 			continue;

 		bcma_register_core(bus, core);
 	}

 #ifdef CONFIG_BCMA_DRIVER_MIPS
 	if (bus->drv_cc.pflash.present) {
 		err = platform_device_register(&bcma_pflash_dev);
 		if (err)
 			bcma_err(bus, "Error registering parallel flash\n");
 	}
 #endif

 #ifdef CONFIG_BCMA_SFLASH
 	if (bus->drv_cc.sflash.present) {
 		err = platform_device_register(&bcma_sflash_dev);
 		if (err)
 			bcma_err(bus, "Error registering serial flash\n");
 	}
 #endif

 #ifdef CONFIG_BCMA_NFLASH
 	if (bus->drv_cc.nflash.present) {
 		err = platform_device_register(&bcma_nflash_dev);
 		if (err)
 			bcma_err(bus, "Error registering NAND flash\n");
 	}
 #endif
 	err = bcma_gpio_init(&bus->drv_cc);
 	if (err == -ENOTSUPP)
 		bcma_debug(bus, "GPIO driver not activated\n");
 	else if (err)
 		bcma_err(bus, "Error registering GPIO driver: %i\n", err);

 	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
 		err = bcma_chipco_watchdog_register(&bus->drv_cc);
 		if (err)
 			bcma_err(bus, "Error registering watchdog driver\n");
 	}

 	return 0;
 }

 static void bcma_unregister_cores(struct bcma_bus *bus)
 {
 	struct bcma_device *core, *tmp;

 	list_for_each_entry_safe(core, tmp, &bus->cores, list) {
 		if (!core->dev_registered)
 			continue;
 		list_del(&core->list);
 		device_unregister(&core->dev);
 	}
 	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
 		platform_device_unregister(bus->drv_cc.watchdog);

 	/* Now noone uses internally-handled cores, we can free them */
 	list_for_each_entry_safe(core, tmp, &bus->cores, list) {
 		list_del(&core->list);
 		kfree(core);
 	}
 }

 int bcma_bus_register(struct bcma_bus *bus)
 {
 	int err;
 	struct bcma_device *core;

 	/* Scan for devices (cores) */
 	err = bcma_bus_scan(bus);
 	if (err) {
 		bcma_err(bus, "Failed to scan: %d\n", err);
 		return err;
 	}

 	/* Early init CC core */
 	core = bcma_find_core(bus, bcma_cc_core_id(bus));
 	if (core) {
 		bus->drv_cc.core = core;
 		bcma_core_chipcommon_early_init(&bus->drv_cc);
 	}

 	/* Cores providing flash access go before SPROM init */
 	list_for_each_entry(core, &bus->cores, list) {
 		if (bcma_is_core_needed_early(core->id.id))
 			bcma_register_core(bus, core);
 	}

 	/* Try to get SPROM */
 	err = bcma_sprom_get(bus);
 	if (err == -ENOENT) {
 		bcma_err(bus, "No SPROM available\n");
 	} else if (err)
 		bcma_err(bus, "Failed to get SPROM: %d\n", err);

 	/* Init CC core */
 	core = bcma_find_core(bus, bcma_cc_core_id(bus));
 	if (core) {
 		bus->drv_cc.core = core;
 		bcma_core_chipcommon_init(&bus->drv_cc);
 	}

 	/* Init CC core */
 	core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
 	if (core) {
 		bus->drv_cc_b.core = core;
 		bcma_core_chipcommon_b_init(&bus->drv_cc_b);
 	}

 	/* Init MIPS core */
 	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 	if (core) {
 		bus->drv_mips.core = core;
 		bcma_core_mips_init(&bus->drv_mips);
 	}

 	/* Init PCIE core */
 	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
 	if (core) {
 		bus->drv_pci[0].core = core;
 		bcma_core_pci_init(&bus->drv_pci[0]);
 	}

 	/* Init PCIE core */
 	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
 	if (core) {
 		bus->drv_pci[1].core = core;
 		bcma_core_pci_init(&bus->drv_pci[1]);
 	}

 	/* Init PCIe Gen 2 core */
 	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
 	if (core) {
 		bus->drv_pcie2.core = core;
 		bcma_core_pcie2_init(&bus->drv_pcie2);
 	}

 	/* Init GBIT MAC COMMON core */
 	core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
 	if (core) {
 		bus->drv_gmac_cmn.core = core;
 		bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
 	}

 	/* Register found cores */
 	bcma_register_devices(bus);

 	bcma_info(bus, "Bus registered\n");

 	return 0;
 }

 void bcma_bus_unregister(struct bcma_bus *bus)
 {
 	int err;

 	err = bcma_gpio_unregister(&bus->drv_cc);
 	if (err == -EBUSY)
 		bcma_err(bus, "Some GPIOs are still in use.\n");
 	else if (err)
 		bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);

 	bcma_core_chipcommon_b_free(&bus->drv_cc_b);

 	bcma_unregister_cores(bus);
 }

 /*
  * This is a special version of bus registration function designed for SoCs.
  * It scans bus and performs basic initialization of main cores only.
  * Please note it requires memory allocation, however it won't try to sleep.
  */
 int __init bcma_bus_early_register(struct bcma_bus *bus)
 {
 	int err;
 	struct bcma_device *core;

 	/* Scan for devices (cores) */
 	err = bcma_bus_scan(bus);
 	if (err) {
 		bcma_err(bus, "Failed to scan bus: %d\n", err);
 		return -1;
 	}

 	/* Early init CC core */
 	core = bcma_find_core(bus, bcma_cc_core_id(bus));
 	if (core) {
 		bus->drv_cc.core = core;
 		bcma_core_chipcommon_early_init(&bus->drv_cc);
 	}

 	/* Early init MIPS core */
 	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
 	if (core) {
 		bus->drv_mips.core = core;
 		bcma_core_mips_early_init(&bus->drv_mips);
 	}

 	bcma_info(bus, "Early bus registered\n");

 	return 0;
 }

 #ifdef CONFIG_PM
 int bcma_bus_suspend(struct bcma_bus *bus)
 {
 	struct bcma_device *core;

 	list_for_each_entry(core, &bus->cores, list) {
 		struct device_driver *drv = core->dev.driver;
 		if (drv) {
 			struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 			if (adrv->suspend)
 				adrv->suspend(core);
 		}
 	}
 	return 0;
 }

 int bcma_bus_resume(struct bcma_bus *bus)
 {
 	struct bcma_device *core;

 	/* Init CC core */
 	if (bus->drv_cc.core) {
 		bus->drv_cc.setup_done = false;
 		bcma_core_chipcommon_init(&bus->drv_cc);
 	}

 	list_for_each_entry(core, &bus->cores, list) {
 		struct device_driver *drv = core->dev.driver;
 		if (drv) {
 			struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 			if (adrv->resume)
 				adrv->resume(core);
 		}
 	}

 	return 0;
 }
 #endif

 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
 {
 	drv->drv.name = drv->name;
 	drv->drv.bus = &bcma_bus_type;
 	drv->drv.owner = owner;

 	return driver_register(&drv->drv);
 }
 EXPORT_SYMBOL_GPL(__bcma_driver_register);

 void bcma_driver_unregister(struct bcma_driver *drv)
 {
 	driver_unregister(&drv->drv);
 }
 EXPORT_SYMBOL_GPL(bcma_driver_unregister);

 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
 	const struct bcma_device_id *cid = &core->id;
 	const struct bcma_device_id *did;

 	for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
 	    if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
 		(did->id == cid->id || did->id == BCMA_ANY_ID) &&
 		(did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
 		(did->class == cid->class || did->class == BCMA_ANY_CLASS))
 			return 1;
 	}
 	return 0;
 }

 static int bcma_device_probe(struct device *dev)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 					       drv);
 	int err = 0;

 	if (adrv->probe)
 		err = adrv->probe(core);

 	return err;
 }

 static int bcma_device_remove(struct device *dev)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
 					       drv);

 	if (adrv->remove)
 		adrv->remove(core);

 	return 0;
 }

 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);

 	return add_uevent_var(env,
 			      "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
 			      core->id.manuf, core->id.id,
 			      core->id.rev, core->id.class);
 }

 static int __init bcma_modinit(void)
 {
 	int err;

 	err = bus_register(&bcma_bus_type);
 	if (err)
 		return err;

 	err = bcma_host_soc_register_driver();
 	if (err) {
 		pr_err("SoC host initialization failed\n");
 		err = 0;
 	}
 #ifdef CONFIG_BCMA_HOST_PCI
 	err = bcma_host_pci_init();
 	if (err) {
 		pr_err("PCI host initialization failed\n");
 		err = 0;
 	}
 #endif

 	return err;
 }
 fs_initcall(bcma_modinit);

 static void __exit bcma_modexit(void)
 {
 #ifdef CONFIG_BCMA_HOST_PCI
 	bcma_host_pci_exit();
 #endif
 	bcma_host_soc_unregister_driver();
 	bus_unregister(&bcma_bus_type);
 }
 module_exit(bcma_modexit)
	/*
	* Broadcom specific AMBA
	* Bus subsystem
	*
	* Licensed under the GNU/GPL. See COPYING for details.
	*/

	#include "bcma_private.h"
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/bcma/bcma.h>
	#include <linux/slab.h>
	#include <linux/of_address.h>
	#include <linux/of_irq.h>

	MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
	MODULE_LICENSE("GPL");

	/* contains the number the next bus should get. */
	static unsigned int bcma_bus_next_num = 0;

	/* bcma_buses_mutex locks the bcma_bus_next_num */
	static DEFINE_MUTEX(bcma_buses_mutex);

	static int bcma_bus_match(struct device dev, struct device_driver drv);
	static int bcma_device_probe(struct device *dev);
	static int bcma_device_remove(struct device *dev);
	static int bcma_device_uevent(struct device dev, struct kobj_uevent_env env);

	static ssize_t manuf_show(struct device dev, struct device_attribute attr, char *buf)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	return sprintf(buf, "0x%03X\n", core->id.manuf);
	}
	static DEVICE_ATTR_RO(manuf);

	static ssize_t id_show(struct device dev, struct device_attribute attr, char *buf)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	return sprintf(buf, "0x%03X\n", core->id.id);
	}
	static DEVICE_ATTR_RO(id);

	static ssize_t rev_show(struct device dev, struct device_attribute attr, char *buf)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	return sprintf(buf, "0x%02X\n", core->id.rev);
	}
	static DEVICE_ATTR_RO(rev);

	static ssize_t class_show(struct device dev, struct device_attribute attr, char *buf)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	return sprintf(buf, "0x%X\n", core->id.class);
	}
	static DEVICE_ATTR_RO(class);

	static struct attribute *bcma_device_attrs[] = {
	&dev_attr_manuf.attr,
	&dev_attr_id.attr,
	&dev_attr_rev.attr,
	&dev_attr_class.attr,
	NULL,
	};
	ATTRIBUTE_GROUPS(bcma_device);

	static struct bus_type bcma_bus_type = {
	.name = "bcma",
	.match = bcma_bus_match,
	.probe = bcma_device_probe,
	.remove = bcma_device_remove,
	.uevent = bcma_device_uevent,
	.dev_groups = bcma_device_groups,
	};

	static u16 bcma_cc_core_id(struct bcma_bus *bus)
	{
	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
	return BCMA_CORE_4706_CHIPCOMMON;
	return BCMA_CORE_CHIPCOMMON;
	}

	struct bcma_device bcma_find_core_unit(struct bcma_bus bus, u16 coreid,
	u8 unit)
	{
	struct bcma_device *core;

	list_for_each_entry(core, &bus->cores, list) {
	if (core->id.id == coreid && core->core_unit == unit)
	return core;
	}
	return NULL;
	}
	EXPORT_SYMBOL_GPL(bcma_find_core_unit);

	bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
	int timeout)
	{
	unsigned long deadline = jiffies + timeout;
	u32 val;

	do {
	val = bcma_read32(core, reg);
	if ((val & mask) == value)
	return true;
	cpu_relax();
	udelay(10);
	} while (!time_after_eq(jiffies, deadline));

	bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);

	return false;
	}

	static void bcma_release_core_dev(struct device *dev)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	if (core->io_addr)
	iounmap(core->io_addr);
	if (core->io_wrap)
	iounmap(core->io_wrap);
	kfree(core);
	}

	static bool bcma_is_core_needed_early(u16 core_id)
	{
	switch (core_id) {
	case BCMA_CORE_NS_NAND:
	case BCMA_CORE_NS_QSPI:
	return true;
	}

	return false;
	}

	#if defined(CONFIG_OF) && defined(CONFIG_OF_ADDRESS)
	static struct device_node bcma_of_find_child_device(struct platform_device parent,
	struct bcma_device *core)
	{
	struct device_node *node;
	u64 size;
	const __be32 *reg;

	if (!parent \|\| !parent->dev.of_node)
	return NULL;

	for_each_child_of_node(parent->dev.of_node, node) {
	reg = of_get_address(node, 0, &size, NULL);
	if (!reg)
	continue;
	if (of_translate_address(node, reg) == core->addr)
	return node;
	}
	return NULL;
	}

	static int bcma_of_irq_parse(struct platform_device *parent,
	struct bcma_device *core,
	struct of_phandle_args *out_irq, int num)
	{
	__be32 laddr[1];
	int rc;

	if (core->dev.of_node) {
	rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
	if (!rc)
	return rc;
	}

	out_irq->np = parent->dev.of_node;
	out_irq->args_count = 1;
	out_irq->args[0] = num;

	laddr[0] = cpu_to_be32(core->addr);
	return of_irq_parse_raw(laddr, out_irq);
	}

	static unsigned int bcma_of_get_irq(struct platform_device *parent,
	struct bcma_device *core, int num)
	{
	struct of_phandle_args out_irq;
	int ret;

	if (!parent \|\| !parent->dev.of_node)
	return 0;

	ret = bcma_of_irq_parse(parent, core, &out_irq, num);
	if (ret) {
	bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
	ret);
	return 0;
	}

	return irq_create_of_mapping(&out_irq);
	}

	static void bcma_of_fill_device(struct platform_device *parent,
	struct bcma_device *core)
	{
	struct device_node *node;

	node = bcma_of_find_child_device(parent, core);
	if (node)
	core->dev.of_node = node;

	core->irq = bcma_of_get_irq(parent, core, 0);
	}
	#else
	static void bcma_of_fill_device(struct platform_device *parent,
	struct bcma_device *core)
	{
	}
	static inline unsigned int bcma_of_get_irq(struct platform_device *parent,
	struct bcma_device *core, int num)
	{
	return 0;
	}
	#endif /* CONFIG_OF */

	unsigned int bcma_core_irq(struct bcma_device *core, int num)
	{
	struct bcma_bus *bus = core->bus;
	unsigned int mips_irq;

	switch (bus->hosttype) {
	case BCMA_HOSTTYPE_PCI:
	return bus->host_pci->irq;
	case BCMA_HOSTTYPE_SOC:
	if (bus->drv_mips.core && num == 0) {
	mips_irq = bcma_core_mips_irq(core);
	return mips_irq <= 4 ? mips_irq + 2 : 0;
	}
	if (bus->host_pdev)
	return bcma_of_get_irq(bus->host_pdev, core, num);
	return 0;
	case BCMA_HOSTTYPE_SDIO:
	return 0;
	}

	return 0;
	}
	EXPORT_SYMBOL(bcma_core_irq);

	void bcma_prepare_core(struct bcma_bus bus, struct bcma_device core)
	{
	core->dev.release = bcma_release_core_dev;
	core->dev.bus = &bcma_bus_type;
	dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);

	switch (bus->hosttype) {
	case BCMA_HOSTTYPE_PCI:
	core->dev.parent = &bus->host_pci->dev;
	core->dma_dev = &bus->host_pci->dev;
	core->irq = bus->host_pci->irq;
	break;
	case BCMA_HOSTTYPE_SOC:
	core->dev.dma_mask = &core->dev.coherent_dma_mask;
	if (bus->host_pdev) {
	core->dma_dev = &bus->host_pdev->dev;
	core->dev.parent = &bus->host_pdev->dev;
	bcma_of_fill_device(bus->host_pdev, core);
	} else {
	core->dma_dev = &core->dev;
	}
	break;
	case BCMA_HOSTTYPE_SDIO:
	break;
	}
	}

	void bcma_init_bus(struct bcma_bus *bus)
	{
	mutex_lock(&bcma_buses_mutex);
	bus->num = bcma_bus_next_num++;
	mutex_unlock(&bcma_buses_mutex);

	INIT_LIST_HEAD(&bus->cores);
	bus->nr_cores = 0;

	bcma_detect_chip(bus);
	}

	static void bcma_register_core(struct bcma_bus bus, struct bcma_device core)
	{
	int err;

	err = device_register(&core->dev);
	if (err) {
	bcma_err(bus, "Could not register dev for core 0x%03X\n",
	core->id.id);
	put_device(&core->dev);
	return;
	}
	core->dev_registered = true;
	}

	static int bcma_register_devices(struct bcma_bus *bus)
	{
	struct bcma_device *core;
	int err;

	list_for_each_entry(core, &bus->cores, list) {
	/* We support that cores ourself */
	switch (core->id.id) {
	case BCMA_CORE_4706_CHIPCOMMON:
	case BCMA_CORE_CHIPCOMMON:
	case BCMA_CORE_NS_CHIPCOMMON_B:
	case BCMA_CORE_PCI:
	case BCMA_CORE_PCIE:
	case BCMA_CORE_PCIE2:
	case BCMA_CORE_MIPS_74K:
	case BCMA_CORE_4706_MAC_GBIT_COMMON:
	continue;
	}

	/* Early cores were already registered */
	if (bcma_is_core_needed_early(core->id.id))
	continue;

	/* Only first GMAC core on BCM4706 is connected and working */
	if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
	core->core_unit > 0)
	continue;

	bcma_register_core(bus, core);
	}

	#ifdef CONFIG_BCMA_DRIVER_MIPS
	if (bus->drv_cc.pflash.present) {
	err = platform_device_register(&bcma_pflash_dev);
	if (err)
	bcma_err(bus, "Error registering parallel flash\n");
	}
	#endif

	#ifdef CONFIG_BCMA_SFLASH
	if (bus->drv_cc.sflash.present) {
	err = platform_device_register(&bcma_sflash_dev);
	if (err)
	bcma_err(bus, "Error registering serial flash\n");
	}
	#endif

	#ifdef CONFIG_BCMA_NFLASH
	if (bus->drv_cc.nflash.present) {
	err = platform_device_register(&bcma_nflash_dev);
	if (err)
	bcma_err(bus, "Error registering NAND flash\n");
	}
	#endif
	err = bcma_gpio_init(&bus->drv_cc);
	if (err == -ENOTSUPP)
	bcma_debug(bus, "GPIO driver not activated\n");
	else if (err)
	bcma_err(bus, "Error registering GPIO driver: %i\n", err);

	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
	err = bcma_chipco_watchdog_register(&bus->drv_cc);
	if (err)
	bcma_err(bus, "Error registering watchdog driver\n");
	}

	return 0;
	}

	static void bcma_unregister_cores(struct bcma_bus *bus)
	{
	struct bcma_device core, tmp;

	list_for_each_entry_safe(core, tmp, &bus->cores, list) {
	if (!core->dev_registered)
	continue;
	list_del(&core->list);
	device_unregister(&core->dev);
	}
	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
	platform_device_unregister(bus->drv_cc.watchdog);

	/* Now noone uses internally-handled cores, we can free them */
	list_for_each_entry_safe(core, tmp, &bus->cores, list) {
	list_del(&core->list);
	kfree(core);
	}
	}

	int bcma_bus_register(struct bcma_bus *bus)
	{
	int err;
	struct bcma_device *core;

	/* Scan for devices (cores) */
	err = bcma_bus_scan(bus);
	if (err) {
	bcma_err(bus, "Failed to scan: %d\n", err);
	return err;
	}

	/* Early init CC core */
	core = bcma_find_core(bus, bcma_cc_core_id(bus));
	if (core) {
	bus->drv_cc.core = core;
	bcma_core_chipcommon_early_init(&bus->drv_cc);
	}

	/* Cores providing flash access go before SPROM init */
	list_for_each_entry(core, &bus->cores, list) {
	if (bcma_is_core_needed_early(core->id.id))
	bcma_register_core(bus, core);
	}

	/* Try to get SPROM */
	err = bcma_sprom_get(bus);
	if (err == -ENOENT) {
	bcma_err(bus, "No SPROM available\n");
	} else if (err)
	bcma_err(bus, "Failed to get SPROM: %d\n", err);

	/* Init CC core */
	core = bcma_find_core(bus, bcma_cc_core_id(bus));
	if (core) {
	bus->drv_cc.core = core;
	bcma_core_chipcommon_init(&bus->drv_cc);
	}

	/* Init CC core */
	core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
	if (core) {
	bus->drv_cc_b.core = core;
	bcma_core_chipcommon_b_init(&bus->drv_cc_b);
	}

	/* Init MIPS core */
	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
	if (core) {
	bus->drv_mips.core = core;
	bcma_core_mips_init(&bus->drv_mips);
	}

	/* Init PCIE core */
	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
	if (core) {
	bus->drv_pci[0].core = core;
	bcma_core_pci_init(&bus->drv_pci[0]);
	}

	/* Init PCIE core */
	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
	if (core) {
	bus->drv_pci[1].core = core;
	bcma_core_pci_init(&bus->drv_pci[1]);
	}

	/* Init PCIe Gen 2 core */
	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
	if (core) {
	bus->drv_pcie2.core = core;
	bcma_core_pcie2_init(&bus->drv_pcie2);
	}

	/* Init GBIT MAC COMMON core */
	core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
	if (core) {
	bus->drv_gmac_cmn.core = core;
	bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
	}

	/* Register found cores */
	bcma_register_devices(bus);

	bcma_info(bus, "Bus registered\n");

	return 0;
	}

	void bcma_bus_unregister(struct bcma_bus *bus)
	{
	int err;

	err = bcma_gpio_unregister(&bus->drv_cc);
	if (err == -EBUSY)
	bcma_err(bus, "Some GPIOs are still in use.\n");
	else if (err)
	bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);

	bcma_core_chipcommon_b_free(&bus->drv_cc_b);

	bcma_unregister_cores(bus);
	}

	/*
	* This is a special version of bus registration function designed for SoCs.
	* It scans bus and performs basic initialization of main cores only.
	* Please note it requires memory allocation, however it won't try to sleep.
	*/
	int __init bcma_bus_early_register(struct bcma_bus *bus)
	{
	int err;
	struct bcma_device *core;

	/* Scan for devices (cores) */
	err = bcma_bus_scan(bus);
	if (err) {
	bcma_err(bus, "Failed to scan bus: %d\n", err);
	return -1;
	}

	/* Early init CC core */
	core = bcma_find_core(bus, bcma_cc_core_id(bus));
	if (core) {
	bus->drv_cc.core = core;
	bcma_core_chipcommon_early_init(&bus->drv_cc);
	}

	/* Early init MIPS core */
	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
	if (core) {
	bus->drv_mips.core = core;
	bcma_core_mips_early_init(&bus->drv_mips);
	}

	bcma_info(bus, "Early bus registered\n");

	return 0;
	}

	#ifdef CONFIG_PM
	int bcma_bus_suspend(struct bcma_bus *bus)
	{
	struct bcma_device *core;

	list_for_each_entry(core, &bus->cores, list) {
	struct device_driver *drv = core->dev.driver;
	if (drv) {
	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	if (adrv->suspend)
	adrv->suspend(core);
	}
	}
	return 0;
	}

	int bcma_bus_resume(struct bcma_bus *bus)
	{
	struct bcma_device *core;

	/* Init CC core */
	if (bus->drv_cc.core) {
	bus->drv_cc.setup_done = false;
	bcma_core_chipcommon_init(&bus->drv_cc);
	}

	list_for_each_entry(core, &bus->cores, list) {
	struct device_driver *drv = core->dev.driver;
	if (drv) {
	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	if (adrv->resume)
	adrv->resume(core);
	}
	}

	return 0;
	}
	#endif

	int __bcma_driver_register(struct bcma_driver drv, struct module owner)
	{
	drv->drv.name = drv->name;
	drv->drv.bus = &bcma_bus_type;
	drv->drv.owner = owner;

	return driver_register(&drv->drv);
	}
	EXPORT_SYMBOL_GPL(__bcma_driver_register);

	void bcma_driver_unregister(struct bcma_driver *drv)
	{
	driver_unregister(&drv->drv);
	}
	EXPORT_SYMBOL_GPL(bcma_driver_unregister);

	static int bcma_bus_match(struct device dev, struct device_driver drv)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	const struct bcma_device_id *cid = &core->id;
	const struct bcma_device_id *did;

	for (did = adrv->id_table; did->manuf \|\| did->id \|\| did->rev; did++) {
	if ((did->manuf == cid->manuf \|\| did->manuf == BCMA_ANY_MANUF) &&
	(did->id == cid->id \|\| did->id == BCMA_ANY_ID) &&
	(did->rev == cid->rev \|\| did->rev == BCMA_ANY_REV) &&
	(did->class == cid->class \|\| did->class == BCMA_ANY_CLASS))
	return 1;
	}
	return 0;
	}

	static int bcma_device_probe(struct device *dev)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
	drv);
	int err = 0;

	if (adrv->probe)
	err = adrv->probe(core);

	return err;
	}

	static int bcma_device_remove(struct device *dev)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
	drv);

	if (adrv->remove)
	adrv->remove(core);

	return 0;
	}

	static int bcma_device_uevent(struct device dev, struct kobj_uevent_env env)
	{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);

	return add_uevent_var(env,
	"MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
	core->id.manuf, core->id.id,
	core->id.rev, core->id.class);
	}

	static int __init bcma_modinit(void)
	{
	int err;

	err = bus_register(&bcma_bus_type);
	if (err)
	return err;

	err = bcma_host_soc_register_driver();
	if (err) {
	pr_err("SoC host initialization failed\n");
	err = 0;
	}
	#ifdef CONFIG_BCMA_HOST_PCI
	err = bcma_host_pci_init();
	if (err) {
	pr_err("PCI host initialization failed\n");
	err = 0;
	}
	#endif

	return err;
	}
	fs_initcall(bcma_modinit);

	static void __exit bcma_modexit(void)
	{
	#ifdef CONFIG_BCMA_HOST_PCI
	bcma_host_pci_exit();
	#endif
	bcma_host_soc_unregister_driver();
	bus_unregister(&bcma_bus_type);
	}
	module_exit(bcma_modexit)