[linux-2.6-block.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>
#include <linux/of_platform.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]);
	}

	/* TODO: remove check for IS_BUILTIN(CONFIG_BCMA) check when
	 * of_default_bus_match_table is exported or in some other way
	 * accessible. This is just a temporary workaround.
	 */
	if (IS_BUILTIN(CONFIG_BCMA) && bus->host_pdev) {
		struct device *dev = &bus->host_pdev->dev;

		of_platform_populate(dev->of_node, of_default_bus_match_table,
				     NULL, dev);
	}

	/* 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>
cae761b5	15	#include <linux/of_platform.h>
8369ae33 RM	16
	17	MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
	18	MODULE_LICENSE("GPL");
	19
8f9ada4f HM	20	/* contains the number the next bus should get. */
	21	static unsigned int bcma_bus_next_num = 0;
	22
	23	/* bcma_buses_mutex locks the bcma_bus_next_num */
	24	static DEFINE_MUTEX(bcma_buses_mutex);
	25
8369ae33 RM	26	static int bcma_bus_match(struct device dev, struct device_driver drv);
	27	static int bcma_device_probe(struct device *dev);
	28	static int bcma_device_remove(struct device *dev);
886b66ef	29	static int bcma_device_uevent(struct device dev, struct kobj_uevent_env env);
8369ae33 RM	30
	31	static ssize_t manuf_show(struct device dev, struct device_attribute attr, char *buf)
	32	{
	33	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	34	return sprintf(buf, "0x%03X\n", core->id.manuf);
	35	}
fdcf4f81 GKH	36	static DEVICE_ATTR_RO(manuf);
fdcf4f81 GKH	37
8369ae33 RM	38	static ssize_t id_show(struct device dev, struct device_attribute attr, char *buf)
	39	{
	40	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	41	return sprintf(buf, "0x%03X\n", core->id.id);
	42	}
fdcf4f81 GKH	43	static DEVICE_ATTR_RO(id);
fdcf4f81 GKH	44
8369ae33 RM	45	static ssize_t rev_show(struct device dev, struct device_attribute attr, char *buf)
	46	{
	47	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	48	return sprintf(buf, "0x%02X\n", core->id.rev);
	49	}
fdcf4f81 GKH	50	static DEVICE_ATTR_RO(rev);
fdcf4f81 GKH	51
8369ae33 RM	52	static ssize_t class_show(struct device dev, struct device_attribute attr, char *buf)
	53	{
	54	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	55	return sprintf(buf, "0x%X\n", core->id.class);
	56	}
fdcf4f81 GKH	57	static DEVICE_ATTR_RO(class);
	58
	59	static struct attribute *bcma_device_attrs[] = {
	60	&dev_attr_manuf.attr,
	61	&dev_attr_id.attr,
	62	&dev_attr_rev.attr,
	63	&dev_attr_class.attr,
	64	NULL,
8369ae33	65	};
fdcf4f81	66	ATTRIBUTE_GROUPS(bcma_device);
8369ae33 RM	67
	68	static struct bus_type bcma_bus_type = {
	69	.name = "bcma",
	70	.match = bcma_bus_match,
	71	.probe = bcma_device_probe,
	72	.remove = bcma_device_remove,
886b66ef	73	.uevent = bcma_device_uevent,
fdcf4f81	74	.dev_groups = bcma_device_groups,
8369ae33 RM	75	};
8369ae33 RM	76
6d5cfc9f RM	77	static u16 bcma_cc_core_id(struct bcma_bus *bus)
	78	{
	79	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
	80	return BCMA_CORE_4706_CHIPCOMMON;
	81	return BCMA_CORE_CHIPCOMMON;
	82	}
	83
929a03ae HM	84	struct bcma_device bcma_find_core_unit(struct bcma_bus bus, u16 coreid,
929a03ae HM	85	u8 unit)
dfae7143 HM	86	{
	87	struct bcma_device *core;
	88
	89	list_for_each_entry(core, &bus->cores, list) {
	90	if (core->id.id == coreid && core->core_unit == unit)
	91	return core;
	92	}
	93	return NULL;
	94	}
b2395b8a	95	EXPORT_SYMBOL_GPL(bcma_find_core_unit);
dfae7143	96
88f9b65d RM	97	bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
	98	int timeout)
	99	{
	100	unsigned long deadline = jiffies + timeout;
	101	u32 val;
	102
	103	do {
	104	val = bcma_read32(core, reg);
	105	if ((val & mask) == value)
	106	return true;
	107	cpu_relax();
	108	udelay(10);
	109	} while (!time_after_eq(jiffies, deadline));
	110
	111	bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
	112
	113	return false;
	114	}
	115
8369ae33 RM	116	static void bcma_release_core_dev(struct device *dev)
	117	{
	118	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
ecd177c2 HM	119	if (core->io_addr)
	120	iounmap(core->io_addr);
	121	if (core->io_wrap)
	122	iounmap(core->io_wrap);
8369ae33 RM	123	kfree(core);
	124	}
	125
37a7f876 RM	126	static bool bcma_is_core_needed_early(u16 core_id)
	127	{
	128	switch (core_id) {
	129	case BCMA_CORE_NS_NAND:
	130	case BCMA_CORE_NS_QSPI:
	131	return true;
	132	}
	133
	134	return false;
	135	}
	136
78afe83c	137	#if defined(CONFIG_OF) && defined(CONFIG_OF_ADDRESS)
2101e533 HM	138	static struct device_node bcma_of_find_child_device(struct platform_device parent,
	139	struct bcma_device *core)
	140	{
	141	struct device_node *node;
	142	u64 size;
	143	const __be32 *reg;
	144
	145	if (!parent \|\| !parent->dev.of_node)
	146	return NULL;
	147
	148	for_each_child_of_node(parent->dev.of_node, node) {
	149	reg = of_get_address(node, 0, &size, NULL);
	150	if (!reg)
	151	continue;
	152	if (of_translate_address(node, reg) == core->addr)
	153	return node;
	154	}
	155	return NULL;
	156	}
	157
71783576 HM	158	static int bcma_of_irq_parse(struct platform_device *parent,
	159	struct bcma_device *core,
	160	struct of_phandle_args *out_irq, int num)
	161	{
	162	__be32 laddr[1];
	163	int rc;
	164
	165	if (core->dev.of_node) {
	166	rc = of_irq_parse_one(core->dev.of_node, num, out_irq);
	167	if (!rc)
	168	return rc;
	169	}
	170
	171	out_irq->np = parent->dev.of_node;
	172	out_irq->args_count = 1;
	173	out_irq->args[0] = num;
	174
	175	laddr[0] = cpu_to_be32(core->addr);
	176	return of_irq_parse_raw(laddr, out_irq);
	177	}
	178
	179	static unsigned int bcma_of_get_irq(struct platform_device *parent,
	180	struct bcma_device *core, int num)
	181	{
	182	struct of_phandle_args out_irq;
	183	int ret;
	184
	185	if (!parent \|\| !parent->dev.of_node)
	186	return 0;
	187
	188	ret = bcma_of_irq_parse(parent, core, &out_irq, num);
	189	if (ret) {
	190	bcma_debug(core->bus, "bcma_of_get_irq() failed with rc=%d\n",
	191	ret);
	192	return 0;
	193	}
	194
	195	return irq_create_of_mapping(&out_irq);
	196	}
	197
2101e533 HM	198	static void bcma_of_fill_device(struct platform_device *parent,
	199	struct bcma_device *core)
	200	{
	201	struct device_node *node;
	202
	203	node = bcma_of_find_child_device(parent, core);
	204	if (node)
	205	core->dev.of_node = node;
71783576 HM	206
71783576 HM	207	core->irq = bcma_of_get_irq(parent, core, 0);
2101e533 HM	208	}
	209	#else
	210	static void bcma_of_fill_device(struct platform_device *parent,
	211	struct bcma_device *core)
	212	{
	213	}
71783576 HM	214	static inline unsigned int bcma_of_get_irq(struct platform_device *parent,
	215	struct bcma_device *core, int num)
	216	{
	217	return 0;
	218	}
2101e533 HM	219	#endif /* CONFIG_OF */
2101e533 HM	220
85eb92e8 HM	221	unsigned int bcma_core_irq(struct bcma_device *core, int num)
	222	{
	223	struct bcma_bus *bus = core->bus;
	224	unsigned int mips_irq;
	225
	226	switch (bus->hosttype) {
	227	case BCMA_HOSTTYPE_PCI:
	228	return bus->host_pci->irq;
	229	case BCMA_HOSTTYPE_SOC:
	230	if (bus->drv_mips.core && num == 0) {
	231	mips_irq = bcma_core_mips_irq(core);
	232	return mips_irq <= 4 ? mips_irq + 2 : 0;
	233	}
71783576 HM	234	if (bus->host_pdev)
	235	return bcma_of_get_irq(bus->host_pdev, core, num);
	236	return 0;
85eb92e8 HM	237	case BCMA_HOSTTYPE_SDIO:
	238	return 0;
	239	}
	240
	241	return 0;
	242	}
	243	EXPORT_SYMBOL(bcma_core_irq);
	244
ab54bc84	245	void bcma_prepare_core(struct bcma_bus bus, struct bcma_device core)
6e094bd8	246	{
6e094bd8 RM	247	core->dev.release = bcma_release_core_dev;
	248	core->dev.bus = &bcma_bus_type;
	249	dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
	250
	251	switch (bus->hosttype) {
	252	case BCMA_HOSTTYPE_PCI:
	253	core->dev.parent = &bus->host_pci->dev;
	254	core->dma_dev = &bus->host_pci->dev;
	255	core->irq = bus->host_pci->irq;
	256	break;
	257	case BCMA_HOSTTYPE_SOC:
	258	core->dev.dma_mask = &core->dev.coherent_dma_mask;
2101e533 HM	259	if (bus->host_pdev) {
	260	core->dma_dev = &bus->host_pdev->dev;
	261	core->dev.parent = &bus->host_pdev->dev;
	262	bcma_of_fill_device(bus->host_pdev, core);
	263	} else {
	264	core->dma_dev = &core->dev;
	265	}
6e094bd8 RM	266	break;
	267	case BCMA_HOSTTYPE_SDIO:
	268	break;
	269	}
ab54bc84 RM	270	}
ab54bc84 RM	271
799038ea RM	272	void bcma_init_bus(struct bcma_bus *bus)
	273	{
	274	mutex_lock(&bcma_buses_mutex);
	275	bus->num = bcma_bus_next_num++;
	276	mutex_unlock(&bcma_buses_mutex);
	277
	278	INIT_LIST_HEAD(&bus->cores);
	279	bus->nr_cores = 0;
	280
	281	bcma_detect_chip(bus);
	282	}
	283
ab54bc84 RM	284	static void bcma_register_core(struct bcma_bus bus, struct bcma_device core)
	285	{
	286	int err;
6e094bd8 RM	287
	288	err = device_register(&core->dev);
	289	if (err) {
	290	bcma_err(bus, "Could not register dev for core 0x%03X\n",
	291	core->id.id);
	292	put_device(&core->dev);
	293	return;
	294	}
	295	core->dev_registered = true;
	296	}
	297
	298	static int bcma_register_devices(struct bcma_bus *bus)
8369ae33 RM	299	{
8369ae33 RM	300	struct bcma_device *core;
6e094bd8	301	int err;
8369ae33 RM	302
	303	list_for_each_entry(core, &bus->cores, list) {
	304	/* We support that cores ourself */
	305	switch (core->id.id) {
6d5cfc9f	306	case BCMA_CORE_4706_CHIPCOMMON:
8369ae33	307	case BCMA_CORE_CHIPCOMMON:
1716bcf3	308	case BCMA_CORE_NS_CHIPCOMMON_B:
8369ae33 RM	309	case BCMA_CORE_PCI:
8369ae33 RM	310	case BCMA_CORE_PCIE:
f473832f	311	case BCMA_CORE_PCIE2:
21e0534a	312	case BCMA_CORE_MIPS_74K:
e1ac4b40	313	case BCMA_CORE_4706_MAC_GBIT_COMMON:
8369ae33 RM	314	continue;
	315	}
	316
37a7f876 RM	317	/* Early cores were already registered */
	318	if (bcma_is_core_needed_early(core->id.id))
	319	continue;
	320
10419d08 RM	321	/* Only first GMAC core on BCM4706 is connected and working */
	322	if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
	323	core->core_unit > 0)
	324	continue;
	325
6e094bd8	326	bcma_register_core(bus, core);
8369ae33 RM	327	}
8369ae33 RM	328
73e4dbe4 RM	329	#ifdef CONFIG_BCMA_DRIVER_MIPS
	330	if (bus->drv_cc.pflash.present) {
	331	err = platform_device_register(&bcma_pflash_dev);
	332	if (err)
	333	bcma_err(bus, "Error registering parallel flash\n");
	334	}
	335	#endif
	336
d57ef3a6 RM	337	#ifdef CONFIG_BCMA_SFLASH
	338	if (bus->drv_cc.sflash.present) {
	339	err = platform_device_register(&bcma_sflash_dev);
	340	if (err)
	341	bcma_err(bus, "Error registering serial flash\n");
	342	}
	343	#endif
	344
371a0044 RM	345	#ifdef CONFIG_BCMA_NFLASH
	346	if (bus->drv_cc.nflash.present) {
	347	err = platform_device_register(&bcma_nflash_dev);
	348	if (err)
	349	bcma_err(bus, "Error registering NAND flash\n");
	350	}
	351	#endif
cf0936b0 HM	352	err = bcma_gpio_init(&bus->drv_cc);
	353	if (err == -ENOTSUPP)
	354	bcma_debug(bus, "GPIO driver not activated\n");
	355	else if (err)
	356	bcma_err(bus, "Error registering GPIO driver: %i\n", err);
371a0044	357
a4855f39 HM	358	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
	359	err = bcma_chipco_watchdog_register(&bus->drv_cc);
	360	if (err)
	361	bcma_err(bus, "Error registering watchdog driver\n");
	362	}
	363
8369ae33 RM	364	return 0;
	365	}
	366
9b6cc9a8	367	void bcma_unregister_cores(struct bcma_bus *bus)
8369ae33	368	{
1fffa905	369	struct bcma_device core, tmp;
8369ae33	370
1fffa905	371	list_for_each_entry_safe(core, tmp, &bus->cores, list) {
17fbaa6e RM	372	if (!core->dev_registered)
17fbaa6e RM	373	continue;
1fffa905	374	list_del(&core->list);
17fbaa6e	375	device_unregister(&core->dev);
8369ae33	376	}
a4855f39 HM	377	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
a4855f39 HM	378	platform_device_unregister(bus->drv_cc.watchdog);
17fbaa6e RM	379
	380	/* Now noone uses internally-handled cores, we can free them */
	381	list_for_each_entry_safe(core, tmp, &bus->cores, list) {
	382	list_del(&core->list);
	383	kfree(core);
	384	}
8369ae33 RM	385	}
8369ae33 RM	386
0f58a01d	387	int bcma_bus_register(struct bcma_bus *bus)
8369ae33 RM	388	{
	389	int err;
	390	struct bcma_device *core;
	391
	392	/* Scan for devices (cores) */
	393	err = bcma_bus_scan(bus);
	394	if (err) {
3d9d8af3	395	bcma_err(bus, "Failed to scan: %d\n", err);
1cabf7db	396	return err;
8369ae33 RM	397	}
8369ae33 RM	398
30cfb023 HM	399	/* Early init CC core */
	400	core = bcma_find_core(bus, bcma_cc_core_id(bus));
	401	if (core) {
	402	bus->drv_cc.core = core;
	403	bcma_core_chipcommon_early_init(&bus->drv_cc);
	404	}
b504075f RM	405
	406	/* Early init PCIE core */
	407	core = bcma_find_core(bus, BCMA_CORE_PCIE);
	408	if (core) {
	409	bus->drv_pci[0].core = core;
	410	bcma_core_pci_early_init(&bus->drv_pci[0]);
	411	}
cae761b5	412
92ff7a69 HM	413	/* TODO: remove check for IS_BUILTIN(CONFIG_BCMA) check when
	414	* of_default_bus_match_table is exported or in some other way
	415	* accessible. This is just a temporary workaround.
	416	*/
	417	if (IS_BUILTIN(CONFIG_BCMA) && bus->host_pdev) {
cae761b5 RM	418	struct device *dev = &bus->host_pdev->dev;
	419
	420	of_platform_populate(dev->of_node, of_default_bus_match_table,
	421	NULL, dev);
	422	}
30cfb023	423
37a7f876 RM	424	/* Cores providing flash access go before SPROM init */
	425	list_for_each_entry(core, &bus->cores, list) {
	426	if (bcma_is_core_needed_early(core->id.id))
	427	bcma_register_core(bus, core);
	428	}
	429
30cfb023 HM	430	/* Try to get SPROM */
	431	err = bcma_sprom_get(bus);
	432	if (err == -ENOENT) {
	433	bcma_err(bus, "No SPROM available\n");
	434	} else if (err)
	435	bcma_err(bus, "Failed to get SPROM: %d\n", err);
	436
8369ae33	437	/* Init CC core */
6d5cfc9f	438	core = bcma_find_core(bus, bcma_cc_core_id(bus));
8369ae33 RM	439	if (core) {
	440	bus->drv_cc.core = core;
	441	bcma_core_chipcommon_init(&bus->drv_cc);
	442	}
	443
1716bcf3 HM	444	/* Init CC core */
	445	core = bcma_find_core(bus, BCMA_CORE_NS_CHIPCOMMON_B);
	446	if (core) {
	447	bus->drv_cc_b.core = core;
	448	bcma_core_chipcommon_b_init(&bus->drv_cc_b);
	449	}
	450
21e0534a HM	451	/* Init MIPS core */
	452	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
	453	if (core) {
	454	bus->drv_mips.core = core;
	455	bcma_core_mips_init(&bus->drv_mips);
	456	}
	457
8369ae33	458	/* Init PCIE core */
dfae7143 HM	459	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 0);
	460	if (core) {
	461	bus->drv_pci[0].core = core;
	462	bcma_core_pci_init(&bus->drv_pci[0]);
	463	}
	464
	465	/* Init PCIE core */
	466	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE, 1);
8369ae33	467	if (core) {
dfae7143 HM	468	bus->drv_pci[1].core = core;
dfae7143 HM	469	bcma_core_pci_init(&bus->drv_pci[1]);
8369ae33 RM	470	}
8369ae33 RM	471
f473832f RM	472	/* Init PCIe Gen 2 core */
	473	core = bcma_find_core_unit(bus, BCMA_CORE_PCIE2, 0);
	474	if (core) {
	475	bus->drv_pcie2.core = core;
	476	bcma_core_pcie2_init(&bus->drv_pcie2);
	477	}
	478
e1ac4b40 RM	479	/* Init GBIT MAC COMMON core */
	480	core = bcma_find_core(bus, BCMA_CORE_4706_MAC_GBIT_COMMON);
	481	if (core) {
	482	bus->drv_gmac_cmn.core = core;
	483	bcma_core_gmac_cmn_init(&bus->drv_gmac_cmn);
	484	}
	485
8369ae33	486	/* Register found cores */
6e094bd8	487	bcma_register_devices(bus);
8369ae33	488
3d9d8af3	489	bcma_info(bus, "Bus registered\n");
8369ae33 RM	490
	491	return 0;
	492	}
8369ae33 RM	493
	494	void bcma_bus_unregister(struct bcma_bus *bus)
	495	{
c50ae947 HM	496	int err;
	497
	498	err = bcma_gpio_unregister(&bus->drv_cc);
	499	if (err == -EBUSY)
	500	bcma_err(bus, "Some GPIOs are still in use.\n");
	501	else if (err)
	502	bcma_err(bus, "Can not unregister GPIO driver: %i\n", err);
ee915927	503
1716bcf3 HM	504	bcma_core_chipcommon_b_free(&bus->drv_cc_b);
1716bcf3 HM	505
8369ae33 RM	506	bcma_unregister_cores(bus);
8369ae33 RM	507	}
8369ae33	508
c5ed1df7 RM	509	/*
	510	* This is a special version of bus registration function designed for SoCs.
	511	* It scans bus and performs basic initialization of main cores only.
	512	* Please note it requires memory allocation, however it won't try to sleep.
	513	*/
	514	int __init bcma_bus_early_register(struct bcma_bus *bus)
517f43e5 HM	515	{
	516	int err;
	517	struct bcma_device *core;
517f43e5	518
c5ed1df7 RM	519	/* Scan for devices (cores) */
c5ed1df7 RM	520	err = bcma_bus_scan(bus);
517f43e5	521	if (err) {
c5ed1df7	522	bcma_err(bus, "Failed to scan bus: %d\n", err);
517f43e5 HM	523	return -1;
	524	}
	525
49655bb8	526	/* Early init CC core */
6d5cfc9f	527	core = bcma_find_core(bus, bcma_cc_core_id(bus));
517f43e5 HM	528	if (core) {
517f43e5 HM	529	bus->drv_cc.core = core;
49655bb8	530	bcma_core_chipcommon_early_init(&bus->drv_cc);
517f43e5 HM	531	}
517f43e5 HM	532
49655bb8	533	/* Early init MIPS core */
21e0534a HM	534	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
	535	if (core) {
	536	bus->drv_mips.core = core;
49655bb8	537	bcma_core_mips_early_init(&bus->drv_mips);
21e0534a HM	538	}
21e0534a HM	539
3d9d8af3	540	bcma_info(bus, "Early bus registered\n");
517f43e5 HM	541
	542	return 0;
	543	}
	544
775ab521	545	#ifdef CONFIG_PM
685a4ef0 LT	546	int bcma_bus_suspend(struct bcma_bus *bus)
685a4ef0 LT	547	{
7d5869e7 LT	548	struct bcma_device *core;
	549
	550	list_for_each_entry(core, &bus->cores, list) {
	551	struct device_driver *drv = core->dev.driver;
	552	if (drv) {
	553	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	554	if (adrv->suspend)
	555	adrv->suspend(core);
	556	}
	557	}
685a4ef0 LT	558	return 0;
	559	}
	560
775ab521 RM	561	int bcma_bus_resume(struct bcma_bus *bus)
	562	{
	563	struct bcma_device *core;
	564
	565	/* Init CC core */
6d5cfc9f	566	if (bus->drv_cc.core) {
775ab521 RM	567	bus->drv_cc.setup_done = false;
	568	bcma_core_chipcommon_init(&bus->drv_cc);
	569	}
	570
7d5869e7 LT	571	list_for_each_entry(core, &bus->cores, list) {
	572	struct device_driver *drv = core->dev.driver;
	573	if (drv) {
	574	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	575	if (adrv->resume)
	576	adrv->resume(core);
	577	}
	578	}
	579
775ab521 RM	580	return 0;
	581	}
	582	#endif
	583
8369ae33 RM	584	int __bcma_driver_register(struct bcma_driver drv, struct module owner)
	585	{
	586	drv->drv.name = drv->name;
	587	drv->drv.bus = &bcma_bus_type;
	588	drv->drv.owner = owner;
	589
	590	return driver_register(&drv->drv);
	591	}
	592	EXPORT_SYMBOL_GPL(__bcma_driver_register);
	593
	594	void bcma_driver_unregister(struct bcma_driver *drv)
	595	{
	596	driver_unregister(&drv->drv);
	597	}
	598	EXPORT_SYMBOL_GPL(bcma_driver_unregister);
	599
	600	static int bcma_bus_match(struct device dev, struct device_driver drv)
	601	{
	602	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	603	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
	604	const struct bcma_device_id *cid = &core->id;
	605	const struct bcma_device_id *did;
	606
	607	for (did = adrv->id_table; did->manuf \|\| did->id \|\| did->rev; did++) {
	608	if ((did->manuf == cid->manuf \|\| did->manuf == BCMA_ANY_MANUF) &&
	609	(did->id == cid->id \|\| did->id == BCMA_ANY_ID) &&
	610	(did->rev == cid->rev \|\| did->rev == BCMA_ANY_REV) &&
	611	(did->class == cid->class \|\| did->class == BCMA_ANY_CLASS))
	612	return 1;
	613	}
	614	return 0;
	615	}
	616
	617	static int bcma_device_probe(struct device *dev)
	618	{
	619	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	620	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
	621	drv);
	622	int err = 0;
	623
	624	if (adrv->probe)
	625	err = adrv->probe(core);
	626
	627	return err;
	628	}
	629
	630	static int bcma_device_remove(struct device *dev)
	631	{
	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
	636	if (adrv->remove)
	637	adrv->remove(core);
	638
	639	return 0;
	640	}
	641
886b66ef DW	642	static int bcma_device_uevent(struct device dev, struct kobj_uevent_env env)
	643	{
	644	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	645
	646	return add_uevent_var(env,
	647	"MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
	648	core->id.manuf, core->id.id,
	649	core->id.rev, core->id.class);
	650	}
	651
8369ae33 RM	652	static int __init bcma_modinit(void)
	653	{
	654	int err;
	655
	656	err = bus_register(&bcma_bus_type);
	657	if (err)
	658	return err;
	659
2101e533 HM	660	err = bcma_host_soc_register_driver();
	661	if (err) {
	662	pr_err("SoC host initialization failed\n");
	663	err = 0;
	664	}
8369ae33 RM	665	#ifdef CONFIG_BCMA_HOST_PCI
	666	err = bcma_host_pci_init();
	667	if (err) {
	668	pr_err("PCI host initialization failed\n");
	669	err = 0;
	670	}
	671	#endif
	672
	673	return err;
	674	}
	675	fs_initcall(bcma_modinit);
	676
	677	static void __exit bcma_modexit(void)
	678	{
	679	#ifdef CONFIG_BCMA_HOST_PCI
	680	bcma_host_pci_exit();
	681	#endif
2101e533	682	bcma_host_soc_unregister_driver();
8369ae33 RM	683	bus_unregister(&bcma_bus_type);
	684	}
	685	module_exit(bcma_modexit)