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/* * 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> 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(struct bcma_bus *bus, u16 coreid){	struct bcma_device *core; 	list_for_each_entry(core, &bus->cores, list) {		if (core->id.id == coreid)			return core;	}	return NULL;}EXPORT_SYMBOL_GPL(bcma_find_core); 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;} 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 int bcma_register_cores(struct bcma_bus *bus){	struct bcma_device *core;	int err, dev_id = 0; 	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_PCI:		case BCMA_CORE_PCIE:		case BCMA_CORE_MIPS_74K:		case BCMA_CORE_4706_MAC_GBIT_COMMON:			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; 		core->dev.release = bcma_release_core_dev;		core->dev.bus = &bcma_bus_type;		dev_set_name(&core->dev, "bcma%d:%d", bus->num, dev_id); 		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;			core->dma_dev = &core->dev;			break;		case BCMA_HOSTTYPE_SDIO:			break;		} 		err = device_register(&core->dev);		if (err) {			bcma_err(bus,				 "Could not register dev for core 0x%03X\n",				 core->id.id);			continue;		}		core->dev_registered = true;		dev_id++;	} #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) {		list_del(&core->list);		if (core->dev_registered)			device_unregister(&core->dev);	}	if (bus->hosttype == BCMA_HOSTTYPE_SOC)		platform_device_unregister(bus->drv_cc.watchdog);} int bcma_bus_register(struct bcma_bus *bus){	int err;	struct bcma_device *core; 	mutex_lock(&bcma_buses_mutex);	bus->num = bcma_bus_next_num++;	mutex_unlock(&bcma_buses_mutex); 	/* 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);	} 	/* 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 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 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_cores(bus); 	bcma_info(bus, "Bus registered\n"); 	return 0;} void bcma_bus_unregister(struct bcma_bus *bus){	struct bcma_device *cores[3];	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); 	cores[0] = bcma_find_core(bus, BCMA_CORE_MIPS_74K);	cores[1] = bcma_find_core(bus, BCMA_CORE_PCIE);	cores[2] = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON); 	bcma_unregister_cores(bus); 	kfree(cores[2]);	kfree(cores[1]);	kfree(cores[0]);} int __init bcma_bus_early_register(struct bcma_bus *bus,				   struct bcma_device *core_cc,				   struct bcma_device *core_mips){	int err;	struct bcma_device *core;	struct bcma_device_id match; 	bcma_init_bus(bus); 	match.manuf = BCMA_MANUF_BCM;	match.id = bcma_cc_core_id(bus);	match.class = BCMA_CL_SIM;	match.rev = BCMA_ANY_REV; 	/* Scan for chip common core */	err = bcma_bus_scan_early(bus, &match, core_cc);	if (err) {		bcma_err(bus, "Failed to scan for common core: %d\n", err);		return -1;	} 	match.manuf = BCMA_MANUF_MIPS;	match.id = BCMA_CORE_MIPS_74K;	match.class = BCMA_CL_SIM;	match.rev = BCMA_ANY_REV; 	/* Scan for mips core */	err = bcma_bus_scan_early(bus, &match, core_mips);	if (err) {		bcma_err(bus, "Failed to scan for mips core: %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_PMint 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; #ifdef CONFIG_BCMA_HOST_PCI	err = bcma_host_pci_init();

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