Release 4.7 drivers/mcb/mcb-core.c

Directory: drivers/mcb
/*
 * MEN Chameleon Bus.
 *
 * Copyright (C) 2013 MEN Mikroelektronik GmbH (www.men.de)
 * Author: Johannes Thumshirn <johannes.thumshirn@men.de>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; version 2 of the License.
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/idr.h>
#include <linux/mcb.h>

static DEFINE_IDA(mcb_ida);



static const struct mcb_device_id *mcb_match_id(const struct mcb_device_id *ids,
						struct mcb_device *dev)
{
	if (ids) {
		while (ids->device) {
			if (ids->device == dev->id)
				return ids;
			ids++;
		}
	}

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%



static int mcb_match(struct device *dev, struct device_driver *drv)
{
	struct mcb_driver *mdrv = to_mcb_driver(drv);
	struct mcb_device *mdev = to_mcb_device(dev);
	const struct mcb_device_id *found_id;

	found_id = mcb_match_id(mdrv->id_table, mdev);
	if (found_id)
		return 1;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 63 100.00% 1 100.00%
Total 63 100.00% 1 100.00%



static int mcb_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	struct mcb_device *mdev = to_mcb_device(dev);
	int ret;

	ret = add_uevent_var(env, "MODALIAS=mcb:16z%03d", mdev->id);
	if (ret)
		return -ENOMEM;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%



static int mcb_probe(struct device *dev)
{
	struct mcb_driver *mdrv = to_mcb_driver(dev->driver);
	struct mcb_device *mdev = to_mcb_device(dev);
	const struct mcb_device_id *found_id;
	struct module *carrier_mod;
	int ret;

	found_id = mcb_match_id(mdrv->id_table, mdev);
	if (!found_id)
		return -ENODEV;

	carrier_mod = mdev->dev.parent->driver->owner;
	if (!try_module_get(carrier_mod))
		return -EINVAL;

	get_device(dev);
	ret = mdrv->probe(mdev, found_id);
	if (ret)
		module_put(carrier_mod);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 119 100.00% 3 100.00%
Total 119 100.00% 3 100.00%



static int mcb_remove(struct device *dev)
{
	struct mcb_driver *mdrv = to_mcb_driver(dev->driver);
	struct mcb_device *mdev = to_mcb_device(dev);
	struct module *carrier_mod;

	mdrv->remove(mdev);

	carrier_mod = mdev->dev.parent->driver->owner;
	module_put(carrier_mod);

	put_device(&mdev->dev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 73 100.00% 2 100.00%
Total 73 100.00% 2 100.00%



static void mcb_shutdown(struct device *dev)
{
	struct mcb_driver *mdrv = to_mcb_driver(dev->driver);
	struct mcb_device *mdev = to_mcb_device(dev);

	if (mdrv && mdrv->shutdown)
		mdrv->shutdown(mdev);
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 48 100.00% 2 100.00%
Total 48 100.00% 2 100.00%



static ssize_t revision_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct mcb_bus *bus = to_mcb_bus(dev);

	return scnprintf(buf, PAGE_SIZE, "%d\n", bus->revision);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%

static DEVICE_ATTR_RO(revision);



static ssize_t model_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct mcb_bus *bus = to_mcb_bus(dev);

	return scnprintf(buf, PAGE_SIZE, "%c\n", bus->model);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%

static DEVICE_ATTR_RO(model);



static ssize_t minor_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct mcb_bus *bus = to_mcb_bus(dev);

	return scnprintf(buf, PAGE_SIZE, "%d\n", bus->minor);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%

static DEVICE_ATTR_RO(minor);



static ssize_t name_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct mcb_bus *bus = to_mcb_bus(dev);

	return scnprintf(buf, PAGE_SIZE, "%s\n", bus->name);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%

static DEVICE_ATTR_RO(name);


static struct attribute *mcb_bus_attrs[] = {
	&dev_attr_revision.attr,
	&dev_attr_model.attr,
	&dev_attr_minor.attr,
	&dev_attr_name.attr,
	NULL,
};


static const struct attribute_group mcb_carrier_group = {
	.attrs = mcb_bus_attrs,
};


static const struct attribute_group *mcb_carrier_groups[] = {
	&mcb_carrier_group,
	NULL,
};



static struct bus_type mcb_bus_type = {
	.name = "mcb",
	.match = mcb_match,
	.uevent = mcb_uevent,
	.probe = mcb_probe,
	.remove = mcb_remove,
	.shutdown = mcb_shutdown,
};


static struct device_type mcb_carrier_device_type = {
	.name = "mcb-carrier",
	.groups = mcb_carrier_groups,
};

/**
 * __mcb_register_driver() - Register a @mcb_driver at the system
 * @drv: The @mcb_driver
 * @owner: The @mcb_driver's module
 * @mod_name: The name of the @mcb_driver's module
 *
 * Register a @mcb_driver at the system. Perform some sanity checks, if
 * the .probe and .remove methods are provided by the driver.
 */


int __mcb_register_driver(struct mcb_driver *drv, struct module *owner,
			const char *mod_name)
{
	if (!drv->probe || !drv->remove)
		return -EINVAL;

	drv->driver.owner = owner;
	drv->driver.bus = &mcb_bus_type;
	drv->driver.mod_name = mod_name;

	return driver_register(&drv->driver);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 70 100.00% 1 100.00%
Total 70 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(__mcb_register_driver);

/**
 * mcb_unregister_driver() - Unregister a @mcb_driver from the system
 * @drv: The @mcb_driver
 *
 * Unregister a @mcb_driver from the system.
 */


void mcb_unregister_driver(struct mcb_driver *drv)
{
	driver_unregister(&drv->driver);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 18 100.00% 1 100.00%
Total 18 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_unregister_driver);



static void mcb_release_dev(struct device *dev)
{
	struct mcb_device *mdev = to_mcb_device(dev);

	mcb_bus_put(mdev->bus);
	kfree(mdev);
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%

/**
 * mcb_device_register() - Register a mcb_device
 * @bus: The @mcb_bus of the device
 * @dev: The @mcb_device
 *
 * Register a specific @mcb_device at a @mcb_bus and the system itself.
 */


int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev)
{
	int ret;
	int device_id;

	device_initialize(&dev->dev);
	mcb_bus_get(bus);
	dev->dev.bus = &mcb_bus_type;
	dev->dev.parent = bus->dev.parent;
	dev->dev.release = mcb_release_dev;

	device_id = dev->id;
	dev_set_name(&dev->dev, "mcb%d-16z%03d-%d:%d:%d",
		bus->bus_nr, device_id, dev->inst, dev->group, dev->var);

	ret = device_add(&dev->dev);
	if (ret < 0) {
		pr_err("Failed registering device 16z%03d on bus mcb%d (%d)\n",
			device_id, bus->bus_nr, ret);
		goto out;
	}

	return 0;

out:

	return ret;
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 139 100.00% 2 100.00%
Total 139 100.00% 2 100.00%


EXPORT_SYMBOL_GPL(mcb_device_register);



static void mcb_free_bus(struct device *dev)
{
	struct mcb_bus *bus = to_mcb_bus(dev);

	put_device(bus->carrier);
	ida_simple_remove(&mcb_ida, bus->bus_nr);
	kfree(bus);
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 43 100.00% 1 100.00%
Total 43 100.00% 1 100.00%

/**
 * mcb_alloc_bus() - Allocate a new @mcb_bus
 *
 * Allocate a new @mcb_bus.
 */


struct mcb_bus *mcb_alloc_bus(struct device *carrier)
{
	struct mcb_bus *bus;
	int bus_nr;
	int rc;

	bus = kzalloc(sizeof(struct mcb_bus), GFP_KERNEL);
	if (!bus)
		return ERR_PTR(-ENOMEM);

	bus_nr = ida_simple_get(&mcb_ida, 0, 0, GFP_KERNEL);
	if (bus_nr < 0) {
		rc = bus_nr;
		goto err_free;
	}

	bus->bus_nr = bus_nr;
	bus->carrier = get_device(carrier);

	device_initialize(&bus->dev);
	bus->dev.parent = carrier;
	bus->dev.bus = &mcb_bus_type;
	bus->dev.type = &mcb_carrier_device_type;
	bus->dev.release = &mcb_free_bus;

	dev_set_name(&bus->dev, "mcb:%d", bus_nr);
	rc = device_add(&bus->dev);
	if (rc)
		goto err_free;

	return bus;
err_free:
	put_device(carrier);
	kfree(bus);
	return ERR_PTR(rc);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 185 100.00% 5 100.00%
Total 185 100.00% 5 100.00%


EXPORT_SYMBOL_GPL(mcb_alloc_bus);



static int __mcb_devices_unregister(struct device *dev, void *data)
{
	device_unregister(dev);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%



static void mcb_devices_unregister(struct mcb_bus *bus)
{
	bus_for_each_dev(&mcb_bus_type, NULL, NULL, __mcb_devices_unregister);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%

/**
 * mcb_release_bus() - Free a @mcb_bus
 * @bus: The @mcb_bus to release
 *
 * Release an allocated @mcb_bus from the system.
 */


void mcb_release_bus(struct mcb_bus *bus)
{
	mcb_devices_unregister(bus);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_release_bus);

/**
 * mcb_bus_put() - Increment refcnt
 * @bus: The @mcb_bus
 *
 * Get a @mcb_bus' ref
 */


struct mcb_bus *mcb_bus_get(struct mcb_bus *bus)
{
	if (bus)
		get_device(&bus->dev);

	return bus;
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 27 100.00% 1 100.00%
Total 27 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_bus_get);

/**
 * mcb_bus_put() - Decrement refcnt
 * @bus: The @mcb_bus
 *
 * Release a @mcb_bus' ref
 */


void mcb_bus_put(struct mcb_bus *bus)
{
	if (bus)
		put_device(&bus->dev);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_bus_put);

/**
 * mcb_alloc_dev() - Allocate a device
 * @bus: The @mcb_bus the device is part of
 *
 * Allocate a @mcb_device and add bus.
 */


struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus)
{
	struct mcb_device *dev;

	dev = kzalloc(sizeof(struct mcb_device), GFP_KERNEL);
	if (!dev)
		return NULL;

	INIT_LIST_HEAD(&dev->bus_list);
	dev->bus = bus;

	return dev;
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_alloc_dev);

/**
 * mcb_free_dev() - Free @mcb_device
 * @dev: The device to free
 *
 * Free a @mcb_device
 */


void mcb_free_dev(struct mcb_device *dev)
{
	kfree(dev);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_free_dev);



static int __mcb_bus_add_devices(struct device *dev, void *data)
{
	struct mcb_device *mdev = to_mcb_device(dev);
	int retval;

	if (mdev->is_added)
		return 0;

	retval = device_attach(dev);
	if (retval < 0)
		dev_err(dev, "Error adding device (%d)\n", retval);

	mdev->is_added = true;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 68 100.00% 1 100.00%
Total 68 100.00% 1 100.00%



static int __mcb_bus_add_child(struct device *dev, void *data)
{
	struct mcb_device *mdev = to_mcb_device(dev);
	struct mcb_bus *child;

	BUG_ON(!mdev->is_added);
	child = mdev->subordinate;

	if (child)
		mcb_bus_add_devices(child);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 56 100.00% 1 100.00%
Total 56 100.00% 1 100.00%

/**
 * mcb_bus_add_devices() - Add devices in the bus' internal device list
 * @bus: The @mcb_bus we add the devices
 *
 * Add devices in the bus' internal device list to the system.
 */


void mcb_bus_add_devices(const struct mcb_bus *bus)
{
	bus_for_each_dev(&mcb_bus_type, NULL, NULL, __mcb_bus_add_devices);
	bus_for_each_dev(&mcb_bus_type, NULL, NULL, __mcb_bus_add_child);

}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_bus_add_devices);

/**
 * mcb_request_mem() - Request memory
 * @dev: The @mcb_device the memory is for
 * @name: The name for the memory reference.
 *
 * Request memory for a @mcb_device. If @name is NULL the driver name will
 * be used.
 */


struct resource *mcb_request_mem(struct mcb_device *dev, const char *name)
{
	struct resource *mem;
	u32 size;

	if (!name)
		name = dev->dev.driver->name;

	size = resource_size(&dev->mem);

	mem = request_mem_region(dev->mem.start, size, name);
	if (!mem)
		return ERR_PTR(-EBUSY);

	return mem;
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_request_mem);

/**
 * mcb_release_mem() - Release memory requested by device
 * @dev: The @mcb_device that requested the memory
 *
 * Release memory that was prior requested via @mcb_request_mem().
 */


void mcb_release_mem(struct resource *mem)
{
	u32 size;

	size = resource_size(mem);
	release_mem_region(mem->start, size);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 29 100.00% 1 100.00%
Total 29 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_release_mem);



static int __mcb_get_irq(struct mcb_device *dev)
{
	struct resource *irq = &dev->irq;

	return irq->start;
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 26 100.00% 2 100.00%
Total 26 100.00% 2 100.00%

/**
 * mcb_get_irq() - Get device's IRQ number
 * @dev: The @mcb_device the IRQ is for
 *
 * Get the IRQ number of a given @mcb_device.
 */


int mcb_get_irq(struct mcb_device *dev)
{
	struct mcb_bus *bus = dev->bus;

	if (bus->get_irq)
		return bus->get_irq(dev);

	return __mcb_get_irq(dev);
}
Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 39 100.00% 1 100.00%
Total 39 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(mcb_get_irq);



static int mcb_init(void)
{
	return bus_register(&mcb_bus_type);
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%



static void mcb_exit(void)
{
	ida_destroy(&mcb_ida);
	bus_unregister(&mcb_bus_type);
}

Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 20 100.00% 2 100.00%
Total 20 100.00% 2 100.00%

/* mcb must be initialized after PCI but before the chameleon drivers.
 * That means we must use some initcall between subsys_initcall and
 * device_initcall.
 */

fs_initcall(mcb_init);

module_exit(mcb_exit);

MODULE_DESCRIPTION("MEN Chameleon Bus Driver");
MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>");
MODULE_LICENSE("GPL v2");
Overall Contributors
Person Tokens Prop Commits CommitProp
johannes thumshirn johannes thumshirn 1887 100.00% 8 100.00%
Total 1887 100.00% 8 100.00%
  Directory: drivers/mcb

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
johannes thumshirn	johannes thumshirn	53	100.00%	1	100.00%
	Total	53	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/mcb/mcb-core.c

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
