[deliverable/linux.git] / drivers / bcma / main.c

/*
 * 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;
}

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);
	}

	/* Early init PCIE core */
	core = bcma_find_core(bus, BCMA_CORE_PCIE);
	if (core) {
		bus->drv_pci[0].core = core;
		bcma_core_pci_early_init(&bus->drv_pci[0]);
	}

	/* 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)
Commit	Line	Data
8369ae33 RM	1	/*
	2	* Broadcom specific AMBA
	3	* Bus subsystem
	4	*
	5	* Licensed under the GNU/GPL. See COPYING for details.
	6	*/
	7
	8	#include "bcma_private.h"
200351c7	9	#include <linux/module.h>
d57ef3a6	10	#include <linux/platform_device.h>
8369ae33	11	#include <linux/bcma/bcma.h>
eef72699	12	#include <linux/slab.h>
2101e533	13	#include <linux/of_address.h>
71783576	14	#include <linux/of_irq.h>
8369ae33 RM	15
	16	MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
	17	MODULE_LICENSE("GPL");
	18
8f9ada4f HM	19	/* contains the number the next bus should get. */
	20	static unsigned int bcma_bus_next_num = 0;
	21
	22	/* bcma_buses_mutex locks the bcma_bus_next_num */
	23	static DEFINE_MUTEX(bcma_buses_mutex);
	24
8369ae33 RM	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);
886b66ef	28	static int bcma_device_uevent(struct device dev, struct kobj_uevent_env env);
8369ae33 RM	29
	30	static ssize_t manuf_show(struct device dev, struct device_attribute attr, char *buf)
	31	{
	32	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	33	return sprintf(buf, "0x%03X\n", core->id.manuf);
	34	}
fdcf4f81 GKH	35	static DEVICE_ATTR_RO(manuf);
fdcf4f81 GKH	36
8369ae33 RM	37	static ssize_t id_show(struct device dev, struct device_attribute attr, char *buf)
	38	{
	39	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	40	return sprintf(buf, "0x%03X\n", core->id.id);
	41	}
fdcf4f81 GKH	42	static DEVICE_ATTR_RO(id);
fdcf4f81 GKH	43
8369ae33 RM	44	static ssize_t rev_show(struct device dev, struct device_attribute attr, char *buf)
	45	{
	46	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	47	return sprintf(buf, "0x%02X\n", core->id.rev);
	48	}
fdcf4f81 GKH	49	static DEVICE_ATTR_RO(rev);
fdcf4f81 GKH	50
8369ae33 RM	51	static ssize_t class_show(struct device dev, struct device_attribute attr, char *buf)
	52	{
	53	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	54	return sprintf(buf, "0x%X\n", core->id.class);
	55	}
fdcf4f81 GKH	56	static DEVICE_ATTR_RO(class);
	57
	58	static struct attribute *bcma_device_attrs[] = {
	59	&dev_attr_manuf.attr,
	60	&dev_attr_id.attr,
	61	&dev_attr_rev.attr,
	62	&dev_attr_class.attr,
	63	NULL,
8369ae33	64	};
fdcf4f81	65	ATTRIBUTE_GROUPS(bcma_device);
8369ae33 RM	66
	67	static struct bus_type bcma_bus_type = {
	68	.name = "bcma",
	69	.match = bcma_bus_match,
	70	.probe = bcma_device_probe,
	71	.remove = bcma_device_remove,
886b66ef	72	.uevent = bcma_device_uevent,
fdcf4f81	73	.dev_groups = bcma_device_groups,
8369ae33 RM	74	};
8369ae33 RM	75
6d5cfc9f RM	76	static u16 bcma_cc_core_id(struct bcma_bus *bus)
	77	{
	78	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
	79	return BCMA_CORE_4706_CHIPCOMMON;
	80	return BCMA_CORE_CHIPCOMMON;
	81	}
	82
929a03ae HM	83	struct bcma_device bcma_find_core_unit(struct bcma_bus bus, u16 coreid,
929a03ae HM	84	u8 unit)
dfae7143 HM	85	{
	86	struct bcma_device *core;
	87
	88	list_for_each_entry(core, &bus->cores, list) {
	89	if (core->id.id == coreid && core->core_unit == unit)
	90	return core;
	91	}
	92	return NULL;
	93	}
b2395b8a	94	EXPORT_SYMBOL_GPL(bcma_find_core_unit);
dfae7143	95
88f9b65d RM	96	bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
	97	int timeout)
	98	{
	99	unsigned long deadline = jiffies + timeout;
	100	u32 val;
	101
	102	do {
	103	val = bcma_read32(core, reg);
	104	if ((val & mask) == value)
	105	return true;
	106	cpu_relax();
	107	udelay(10);
	108	} while (!time_after_eq(jiffies, deadline));
	109
	110	bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
	111
	112	return false;
	113	}
	114
8369ae33 RM	115	static void bcma_release_core_dev(struct device *dev)
	116	{
	117	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
ecd177c2 HM	118	if (core->io_addr)
	119	iounmap(core->io_addr);
	120	if (core->io_wrap)
	121	iounmap(core->io_wrap);
8369ae33 RM	122	kfree(core);
	123	}
	124
37a7f876 RM	125	static bool bcma_is_core_needed_early(u16 core_id)
	126	{
	127	switch (core_id) {
	128	case BCMA_CORE_NS_NAND:
	129	case BCMA_CORE_NS_QSPI:
	130	return true;
	131	}
	132
	133	return false;
	134	}
	135
78afe83c	136	#if defined(CONFIG_OF) && defined(CONFIG_OF_ADDRESS)
2101e533 HM	137	static struct device_node bcma_of_find_child_device(struct platform_device parent,
	138	struct bcma_device *core)
	139	{
	140	struct device_node *node;
	141	u64 size;
	142	const __be32 *reg;
	143
	144	if (!parent \|\| !parent->dev.of_node)
	145	return NULL;
	146
	147	for_each_child_of_node(parent->dev.of_node, node) {
	148	reg = of_get_address(node, 0, &size, NULL);
	149	if (!reg)
	150	continue;
	151	if (of_translate_address(node, reg) == core->addr)
	152	return node;
	153	}
	154	return NULL;
	155	}
	156
71783576 HM	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)
	160	{
	161	__be32 laddr[1];
	162	int rc;
	163
	164	if (core->dev.of_node) {
	165	rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
	166	if (!rc)
	167	return rc;
	168	}
	169
	170	out_irq->np = parent->dev.of_node;
	171	out_irq->args_count = 1;
	172	out_irq->args[0] = num;
	173
	174	laddr[0] = cpu_to_be32(core->addr);
	175	return of_irq_parse_raw(laddr, out_irq);
	176	}
	177
	178	static unsigned int bcma_of_get_irq(struct platform_device *parent,
	179	struct bcma_device *core, int num)
	180	{
	181	struct of_phandle_args out_irq;
	182	int ret;
	183
	184	if (!parent \|\| !parent->dev.of_node)
	185	return 0;
	186
	187	ret = bcma_of_irq_parse(parent, core, &out_irq, num);
	188	if (ret) {
	189	bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
	190	ret);
	191	return 0;
	192	}
	193
	194	return irq_create_of_mapping(&out_irq);
	195	}
	196
2101e533 HM	197	static void bcma_of_fill_device(struct platform_device *parent,
	198	struct bcma_device *core)
	199	{
	200	struct device_node *node;
	201
	202	node = bcma_of_find_child_device(parent, core);
	203	if (node)
	204	core->dev.of_node = node;
71783576 HM	205
71783576 HM	206	core->irq = bcma_of_get_irq(parent, core, 0);
2101e533 HM	207	}
	208	#else
	209	static void bcma_of_fill_device(struct platform_device *parent,
	210	struct bcma_device *core)
	211	{
	212	}
71783576 HM	213	static inline unsigned int bcma_of_get_irq(struct platform_device *parent,
	214	struct bcma_device *core, int num)
	215	{
	216	return 0;
	217	}
2101e533 HM	218	#endif /* CONFIG_OF */
2101e533 HM	219
85eb92e8 HM	220	unsigned int bcma_core_irq(struct bcma_device *core, int num)
	221	{
	222	struct bcma_bus *bus = core->bus;
	223	unsigned int mips_irq;
	224
	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;
	232	}
71783576 HM	233	if (bus->host_pdev)
	234	return bcma_of_get_irq(bus->host_pdev, core, num);
	235	return 0;
85eb92e8 HM	236	case BCMA_HOSTTYPE_SDIO:
	237	return 0;
	238	}
	239
	240	return 0;
	241	}
	242	EXPORT_SYMBOL(bcma_core_irq);
	243
ab54bc84	244	void bcma_prepare_core(struct bcma_bus bus, struct bcma_device core)
6e094bd8	245	{
6e094bd8 RM	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);
	249
	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;
	255	break;
	256	case BCMA_HOSTTYPE_SOC:
	257	core->dev.dma_mask = &core->dev.coherent_dma_mask;
2101e533 HM	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);
	262	} else {
	263	core->dma_dev = &core->dev;
	264	}
6e094bd8 RM	265	break;
	266	case BCMA_HOSTTYPE_SDIO:
	267	break;
	268	}
ab54bc84 RM	269	}
ab54bc84 RM	270
799038ea RM	271	void bcma_init_bus(struct bcma_bus *bus)
	272	{
	273	mutex_lock(&bcma_buses_mutex);
	274	bus->num = bcma_bus_next_num++;
	275	mutex_unlock(&bcma_buses_mutex);
	276
	277	INIT_LIST_HEAD(&bus->cores);
	278	bus->nr_cores = 0;
	279
	280	bcma_detect_chip(bus);
	281	}
	282
ab54bc84 RM	283	static void bcma_register_core(struct bcma_bus bus, struct bcma_device core)
	284	{
	285	int err;
6e094bd8 RM	286
	287	err = device_register(&core->dev);
	288	if (err) {
	289	bcma_err(bus, "Could not register dev for core 0x%03X\n",
	290	core->id.id);
	291	put_device(&core->dev);
	292	return;
	293	}
	294	core->dev_registered = true;
	295	}
	296
	297	static int bcma_register_devices(struct bcma_bus *bus)
8369ae33 RM	298	{
8369ae33 RM	299	struct bcma_device *core;
6e094bd8	300	int err;
8369ae33 RM	301
	302	list_for_each_entry(core, &bus->cores, list) {
	303	/* We support that cores ourself */
	304	switch (core->id.id) {
6d5cfc9f	305	case BCMA_CORE_4706_CHIPCOMMON:
8369ae33	306	case BCMA_CORE_CHIPCOMMON:
1716bcf3	307	case BCMA_CORE_NS_CHIPCOMMON_B:
8369ae33 RM	308	case BCMA_CORE_PCI:
8369ae33 RM	309	case BCMA_CORE_PCIE:
f473832f	310	case BCMA_CORE_PCIE2:
21e0534a	311	case BCMA_CORE_MIPS_74K:
e1ac4b40	312	case BCMA_CORE_4706_MAC_GBIT_COMMON:
8369ae33 RM	313	continue;
	314	}
	315
37a7f876 RM	316	/* Early cores were already registered */
	317	if (bcma_is_core_needed_early(core->id.id))
	318	continue;
	319
10419d08 RM	320	/* Only first GMAC core on BCM4706 is connected and working */
	321	if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
	322	core->core_unit > 0)
	323	continue;
	324
6e094bd8	325	bcma_register_core(bus, core);
8369ae33 RM	326	}
8369ae33 RM	327
73e4dbe4 RM	328	#ifdef CONFIG_BCMA_DRIVER_MIPS
	329	if (bus->drv_cc.pflash.present) {
	330	err = platform_device_register(&bcma_pflash_dev);
	331	if (err)
	332	bcma_err(bus, "Error registering parallel flash\n");
	333	}
	334	#endif
	335
d57ef3a6 RM	336	#ifdef CONFIG_BCMA_SFLASH
	337	if (bus->drv_cc.sflash.present) {
	338	err = platform_device_register(&bcma_sflash_dev);
	339	if (err)
	340	bcma_err(bus, "Error registering serial flash\n");
	341	}
	342	#endif
	343
371a0044 RM	344	#ifdef CONFIG_BCMA_NFLASH
	345	if (bus->drv_cc.nflash.present) {
	346	err = platform_device_register(&bcma_nflash_dev);
	347	if (err)
	348	bcma_err(bus, "Error registering NAND flash\n");
	349	}
	350	#endif
cf0936b0 HM	351	err = bcma_gpio_init(&bus->drv_cc);
	352	if (err == -ENOTSUPP)
	353	bcma_debug(bus, "GPIO driver not activated\n");
	354	else if (err)
	355	bcma_err(bus, "Error registering GPIO driver: %i\n", err);
371a0044	356
a4855f39 HM	357	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
	358	err = bcma_chipco_watchdog_register(&bus->drv_cc);
	359	if (err)
	360	bcma_err(bus, "Error registering watchdog driver\n");
	361	}
	362
8369ae33 RM	363	return 0;
	364	}
	365
9b6cc9a8	366	void bcma_unregister_cores(struct bcma_bus *bus)
8369ae33	367	{
1fffa905	368	struct bcma_device core, tmp;
8369ae33	369
1fffa905	370	list_for_each_entry_safe(core, tmp, &bus->cores, list) {
17fbaa6e RM	371	if (!core->dev_registered)
17fbaa6e RM	372	continue;
1fffa905	373	list_del(&core->list);
17fbaa6e	374	device_unregister(&core->dev);
8369ae33	375	}
a4855f39 HM	376	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
a4855f39 HM	377	platform_device_unregister(bus->drv_cc.watchdog);
17fbaa6e RM	378
	379	/* Now noone uses internally-handled cores, we can free them */
	380	list_for_each_entry_safe(core, tmp, &bus->cores, list) {
	381	list_del(&core->list);
	382	kfree(core);
	383	}
8369ae33 RM	384	}
8369ae33 RM	385
0f58a01d	386	int bcma_bus_register(struct bcma_bus *bus)
8369ae33 RM	387	{
	388	int err;
	389	struct bcma_device *core;
	390
	391	/* Scan for devices (cores) */
	392	err = bcma_bus_scan(bus);
	393	if (err) {
3d9d8af3	394	bcma_err(bus, "Failed to scan: %d\n", err);
1cabf7db	395	return err;
8369ae33 RM	396	}
8369ae33 RM	397
30cfb023 HM	398	/* Early init CC core */
	399	core = bcma_find_core(bus, bcma_cc_core_id(bus));
	400	if (core) {
	401	bus->drv_cc.core = core;
	402	bcma_core_chipcommon_early_init(&bus->drv_cc);
	403	}
b504075f RM	404
	405	/* Early init PCIE core */
	406	core = bcma_find_core(bus, BCMA_CORE_PCIE);
	407	if (core) {
	408	bus->drv_pci[0].core = core;
	409	bcma_core_pci_early_init(&bus->drv_pci[0]);
	410	}
30cfb023	411
37a7f876 RM	412	/* Cores providing flash access go before SPROM init */
	413	list_for_each_entry(core, &bus->cores, list) {
	414	if (bcma_is_core_needed_early(core->id.id))
	415	bcma_register_core(bus, core);
	416	}
	417
30cfb023 HM	418	/* Try to get SPROM */
	419	err = bcma_sprom_get(bus);
	420	if (err == -ENOENT) {
	421	bcma_err(bus, "No SPROM available\n");
	422	} else if (err)
	423	bcma_err(bus, "Failed to get SPROM: %d\n", err);
	424
8369ae33	425	/* Init CC core */
6d5cfc9f	426	core = bcma_find_core(bus, bcma_cc_core_id(bus));
8369ae33 RM	427	if (core) {
	428	bus->drv_cc.core = core;
	429	bcma_core_chipcommon_init(&bus->drv_cc);
	430	}
	431
1716bcf3 HM	432	/* Init CC core */
	433	core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
	434	if (core) {
	435	bus->drv_cc_b.core = core;
	436	bcma_core_chipcommon_b_init(&bus->drv_cc_b);
	437	}
	438
21e0534a HM	439	/* Init MIPS core */
	440	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
	441	if (core) {
	442	bus->drv_mips.core = core;
	443	bcma_core_mips_init(&bus->drv_mips);
	444	}
	445
8369ae33	446	/* Init PCIE core */
dfae7143 HM	447	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
	448	if (core) {
	449	bus->drv_pci[0].core = core;
	450	bcma_core_pci_init(&bus->drv_pci[0]);
	451	}
	452
	453	/* Init PCIE core */
	454	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
8369ae33	455	if (core) {
dfae7143 HM	456	bus->drv_pci[1].core = core;
dfae7143 HM	457	bcma_core_pci_init(&bus->drv_pci[1]);
8369ae33 RM	458	}
8369ae33 RM	459
f473832f RM	460	/* Init PCIe Gen 2 core */
	461	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
	462	if (core) {
	463	bus->drv_pcie2.core = core;
	464	bcma_core_pcie2_init(&bus->drv_pcie2);
	465	}
	466
e1ac4b40 RM	467	/* Init GBIT MAC COMMON core */
	468	core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
	469	if (core) {
	470	bus->drv_gmac_cmn.core = core;
	471	bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
	472	}
	473
8369ae33	474	/* Register found cores */
6e094bd8	475	bcma_register_devices(bus);
8369ae33	476
3d9d8af3	477	bcma_info(bus, "Bus registered\n");
8369ae33 RM	478
	479	return 0;
	480	}
8369ae33 RM	481
	482	void bcma_bus_unregister(struct bcma_bus *bus)
	483	{
c50ae947 HM	484	int err;
	485
	486	err = bcma_gpio_unregister(&bus->drv_cc);
	487	if (err == -EBUSY)
	488	bcma_err(bus, "Some GPIOs are still in use.\n");
	489	else if (err)
	490	bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
ee915927	491
1716bcf3 HM	492	bcma_core_chipcommon_b_free(&bus->drv_cc_b);
1716bcf3 HM	493
8369ae33 RM	494	bcma_unregister_cores(bus);
8369ae33 RM	495	}
8369ae33	496
c5ed1df7 RM	497	/*
	498	* This is a special version of bus registration function designed for SoCs.
	499	* It scans bus and performs basic initialization of main cores only.
	500	* Please note it requires memory allocation, however it won't try to sleep.
	501	*/
	502	int __init bcma_bus_early_register(struct bcma_bus *bus)
517f43e5 HM	503	{
	504	int err;
	505	struct bcma_device *core;
517f43e5	506
c5ed1df7 RM	507	/* Scan for devices (cores) */
c5ed1df7 RM	508	err = bcma_bus_scan(bus);
517f43e5	509	if (err) {
c5ed1df7	510	bcma_err(bus, "Failed to scan bus: %d\n", err);
517f43e5 HM	511	return -1;
	512	}
	513
49655bb8	514	/* Early init CC core */
6d5cfc9f	515	core = bcma_find_core(bus, bcma_cc_core_id(bus));
517f43e5 HM	516	if (core) {
517f43e5 HM	517	bus->drv_cc.core = core;
49655bb8	518	bcma_core_chipcommon_early_init(&bus->drv_cc);
517f43e5 HM	519	}
517f43e5 HM	520
49655bb8	521	/* Early init MIPS core */
21e0534a HM	522	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
	523	if (core) {
	524	bus->drv_mips.core = core;
49655bb8	525	bcma_core_mips_early_init(&bus->drv_mips);
21e0534a HM	526	}
21e0534a HM	527
3d9d8af3	528	bcma_info(bus, "Early bus registered\n");
517f43e5 HM	529
	530	return 0;
	531	}
	532
775ab521	533	#ifdef CONFIG_PM
685a4ef0 LT	534	int bcma_bus_suspend(struct bcma_bus *bus)
685a4ef0 LT	535	{
7d5869e7 LT	536	struct bcma_device *core;
	537
	538	list_for_each_entry(core, &bus->cores, list) {
	539	struct device_driver *drv = core->dev.driver;
	540	if (drv) {
	541	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	542	if (adrv->suspend)
	543	adrv->suspend(core);
	544	}
	545	}
685a4ef0 LT	546	return 0;
	547	}
	548
775ab521 RM	549	int bcma_bus_resume(struct bcma_bus *bus)
	550	{
	551	struct bcma_device *core;
	552
	553	/* Init CC core */
6d5cfc9f	554	if (bus->drv_cc.core) {
775ab521 RM	555	bus->drv_cc.setup_done = false;
	556	bcma_core_chipcommon_init(&bus->drv_cc);
	557	}
	558
7d5869e7 LT	559	list_for_each_entry(core, &bus->cores, list) {
	560	struct device_driver *drv = core->dev.driver;
	561	if (drv) {
	562	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	563	if (adrv->resume)
	564	adrv->resume(core);
	565	}
	566	}
	567
775ab521 RM	568	return 0;
	569	}
	570	#endif
	571
8369ae33 RM	572	int __bcma_driver_register(struct bcma_driver drv, struct module owner)
	573	{
	574	drv->drv.name = drv->name;
	575	drv->drv.bus = &bcma_bus_type;
	576	drv->drv.owner = owner;
	577
	578	return driver_register(&drv->drv);
	579	}
	580	EXPORT_SYMBOL_GPL(__bcma_driver_register);
	581
	582	void bcma_driver_unregister(struct bcma_driver *drv)
	583	{
	584	driver_unregister(&drv->drv);
	585	}
	586	EXPORT_SYMBOL_GPL(bcma_driver_unregister);
	587
	588	static int bcma_bus_match(struct device dev, struct device_driver drv)
	589	{
	590	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	591	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	592	const struct bcma_device_id *cid = &core->id;
	593	const struct bcma_device_id *did;
	594
	595	for (did = adrv->id_table; did->manuf \|\| did->id \|\| did->rev; did++) {
	596	if ((did->manuf == cid->manuf \|\| did->manuf == BCMA_ANY_MANUF) &&
	597	(did->id == cid->id \|\| did->id == BCMA_ANY_ID) &&
	598	(did->rev == cid->rev \|\| did->rev == BCMA_ANY_REV) &&
	599	(did->class == cid->class \|\| did->class == BCMA_ANY_CLASS))
	600	return 1;
	601	}
	602	return 0;
	603	}
	604
	605	static int bcma_device_probe(struct device *dev)
	606	{
	607	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	608	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
	609	drv);
	610	int err = 0;
	611
	612	if (adrv->probe)
	613	err = adrv->probe(core);
	614
	615	return err;
	616	}
	617
	618	static int bcma_device_remove(struct device *dev)
	619	{
	620	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	621	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
	622	drv);
	623
	624	if (adrv->remove)
	625	adrv->remove(core);
	626
	627	return 0;
	628	}
	629
886b66ef DW	630	static int bcma_device_uevent(struct device dev, struct kobj_uevent_env env)
	631	{
	632	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	633
	634	return add_uevent_var(env,
	635	"MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
	636	core->id.manuf, core->id.id,
	637	core->id.rev, core->id.class);
	638	}
	639
8369ae33 RM	640	static int __init bcma_modinit(void)
	641	{
	642	int err;
	643
	644	err = bus_register(&bcma_bus_type);
	645	if (err)
	646	return err;
	647
2101e533 HM	648	err = bcma_host_soc_register_driver();
	649	if (err) {
	650	pr_err("SoC host initialization failed\n");
	651	err = 0;
	652	}
8369ae33 RM	653	#ifdef CONFIG_BCMA_HOST_PCI
	654	err = bcma_host_pci_init();
	655	if (err) {
	656	pr_err("PCI host initialization failed\n");
	657	err = 0;
	658	}
	659	#endif
	660
	661	return err;
	662	}
	663	fs_initcall(bcma_modinit);
	664
	665	static void __exit bcma_modexit(void)
	666	{
	667	#ifdef CONFIG_BCMA_HOST_PCI
	668	bcma_host_pci_exit();
	669	#endif
2101e533	670	bcma_host_soc_unregister_driver();
8369ae33 RM	671	bus_unregister(&bcma_bus_type);
	672	}
	673	module_exit(bcma_modexit)