diff options
Diffstat (limited to 'drivers/staging/ipack/ipack.c')
| -rw-r--r-- | drivers/staging/ipack/ipack.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/drivers/staging/ipack/ipack.c b/drivers/staging/ipack/ipack.c deleted file mode 100644 index 2b4fa51bf16..00000000000 --- a/drivers/staging/ipack/ipack.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Industry-pack bus support functions. - * - * (C) 2011 Samuel Iglesias Gonsalvez <siglesia@cern.ch>, CERN - * (C) 2012 Samuel Iglesias Gonsalvez <siglesias@igalia.com>, Igalia - * - * 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. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/mutex.h> -#include <linux/slab.h> -#include "ipack.h" - -#define to_ipack_dev(device) container_of(device, struct ipack_device, dev) -#define to_ipack_driver(drv) container_of(drv, struct ipack_driver, driver) - -/* used when allocating bus numbers */ -#define IPACK_MAXBUS 64 - -static DEFINE_MUTEX(ipack_mutex); - -struct ipack_busmap { - unsigned long busmap[IPACK_MAXBUS / (8*sizeof(unsigned long))]; -}; -static struct ipack_busmap busmap; - -static void ipack_device_release(struct device *dev) -{ - struct ipack_device *device = to_ipack_dev(dev); - kfree(device); -} - -static int ipack_bus_match(struct device *device, struct device_driver *driver) -{ - int ret; - struct ipack_device *dev = to_ipack_dev(device); - struct ipack_driver *drv = to_ipack_driver(driver); - - if ((!drv->ops) || (!drv->ops->match)) - return -EINVAL; - - ret = drv->ops->match(dev); - if (ret) - dev->driver = drv; - - return 0; -} - -static int ipack_bus_probe(struct device *device) -{ - struct ipack_device *dev = to_ipack_dev(device); - - if (!dev->driver->ops->probe) - return -EINVAL; - - return dev->driver->ops->probe(dev); -} - -static int ipack_bus_remove(struct device *device) -{ - struct ipack_device *dev = to_ipack_dev(device); - - if (!dev->driver->ops->remove) - return -EINVAL; - - dev->driver->ops->remove(dev); - return 0; -} - -static struct bus_type ipack_bus_type = { - .name = "ipack", - .probe = ipack_bus_probe, - .match = ipack_bus_match, - .remove = ipack_bus_remove, -}; - -static int ipack_assign_bus_number(void) -{ - int busnum; - - mutex_lock(&ipack_mutex); - busnum = find_next_zero_bit(busmap.busmap, IPACK_MAXBUS, 1); - - if (busnum >= IPACK_MAXBUS) { - pr_err("too many buses\n"); - busnum = -1; - goto error_find_busnum; - } - - set_bit(busnum, busmap.busmap); - -error_find_busnum: - mutex_unlock(&ipack_mutex); - return busnum; -} - -struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots, - struct ipack_bus_ops *ops) -{ - int bus_nr; - struct ipack_bus_device *bus; - - bus = kzalloc(sizeof(struct ipack_bus_device), GFP_KERNEL); - if (!bus) - return NULL; - - bus_nr = ipack_assign_bus_number(); - if (bus_nr < 0) { - kfree(bus); - return NULL; - } - - bus->bus_nr = bus_nr; - bus->parent = parent; - bus->slots = slots; - bus->ops = ops; - return bus; -} -EXPORT_SYMBOL_GPL(ipack_bus_register); - -int ipack_bus_unregister(struct ipack_bus_device *bus) -{ - mutex_lock(&ipack_mutex); - clear_bit(bus->bus_nr, busmap.busmap); - mutex_unlock(&ipack_mutex); - kfree(bus); - return 0; -} -EXPORT_SYMBOL_GPL(ipack_bus_unregister); - -int ipack_driver_register(struct ipack_driver *edrv, struct module *owner, - char *name) -{ - edrv->driver.owner = owner; - edrv->driver.name = name; - edrv->driver.bus = &ipack_bus_type; - return driver_register(&edrv->driver); -} -EXPORT_SYMBOL_GPL(ipack_driver_register); - -void ipack_driver_unregister(struct ipack_driver *edrv) -{ - driver_unregister(&edrv->driver); -} -EXPORT_SYMBOL_GPL(ipack_driver_unregister); - -struct ipack_device *ipack_device_register(struct ipack_bus_device *bus, - int slot, int irqv) -{ - int ret; - struct ipack_device *dev; - - dev = kzalloc(sizeof(struct ipack_device), GFP_KERNEL); - if (!dev) - return NULL; - - dev->dev.bus = &ipack_bus_type; - dev->dev.release = ipack_device_release; - dev->dev.parent = bus->parent; - dev->slot = slot; - dev->bus_nr = bus->bus_nr; - dev->irq = irqv; - dev->bus = bus; - dev_set_name(&dev->dev, - "ipack-dev.%u.%u", dev->bus_nr, dev->slot); - - ret = device_register(&dev->dev); - if (ret < 0) { - pr_err("error registering the device.\n"); - dev->driver->ops->remove(dev); - kfree(dev); - return NULL; - } - - return dev; -} -EXPORT_SYMBOL_GPL(ipack_device_register); - -void ipack_device_unregister(struct ipack_device *dev) -{ - device_unregister(&dev->dev); -} -EXPORT_SYMBOL_GPL(ipack_device_unregister); - -static int __init ipack_init(void) -{ - return bus_register(&ipack_bus_type); -} - -static void __exit ipack_exit(void) -{ - bus_unregister(&ipack_bus_type); -} - -module_init(ipack_init); -module_exit(ipack_exit); - -MODULE_AUTHOR("Samuel Iglesias Gonsalvez <siglesias@igalia.com>"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Industry-pack bus core"); |