cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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zorro-driver.c (4356B)

      1/*
      2 *  Zorro Driver Services
      3 *
      4 *  Copyright (C) 2003 Geert Uytterhoeven
      5 *
      6 *  Loosely based on drivers/pci/pci-driver.c
      7 *
      8 *  This file is subject to the terms and conditions of the GNU General Public
      9 *  License.  See the file COPYING in the main directory of this archive
     10 *  for more details.
     11 */
     12
     13#include <linux/init.h>
     14#include <linux/module.h>
     15#include <linux/zorro.h>
     16
     17#include "zorro.h"
     18
     19
     20    /**
     21     *  zorro_match_device - Tell if a Zorro device structure has a matching
     22     *                       Zorro device id structure
     23     *  @ids: array of Zorro device id structures to search in
     24     *  @dev: the Zorro device structure to match against
     25     *
     26     *  Used by a driver to check whether a Zorro device present in the
     27     *  system is in its list of supported devices. Returns the matching
     28     *  zorro_device_id structure or %NULL if there is no match.
     29     */
     30
     31static const struct zorro_device_id *
     32zorro_match_device(const struct zorro_device_id *ids,
     33		   const struct zorro_dev *z)
     34{
     35	while (ids->id) {
     36		if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
     37			return ids;
     38		ids++;
     39	}
     40	return NULL;
     41}
     42
     43
     44static int zorro_device_probe(struct device *dev)
     45{
     46	int error = 0;
     47	struct zorro_driver *drv = to_zorro_driver(dev->driver);
     48	struct zorro_dev *z = to_zorro_dev(dev);
     49
     50	if (drv->probe) {
     51		const struct zorro_device_id *id;
     52
     53		id = zorro_match_device(drv->id_table, z);
     54		if (id)
     55			error = drv->probe(z, id);
     56		if (error >= 0)
     57			error = 0;
     58	}
     59	return error;
     60}
     61
     62
     63static void zorro_device_remove(struct device *dev)
     64{
     65	struct zorro_dev *z = to_zorro_dev(dev);
     66	struct zorro_driver *drv = to_zorro_driver(dev->driver);
     67
     68	if (drv->remove)
     69		drv->remove(z);
     70}
     71
     72
     73    /**
     74     *  zorro_register_driver - register a new Zorro driver
     75     *  @drv: the driver structure to register
     76     *
     77     *  Adds the driver structure to the list of registered drivers
     78     *  Returns zero or a negative error value.
     79     */
     80
     81int zorro_register_driver(struct zorro_driver *drv)
     82{
     83	/* initialize common driver fields */
     84	drv->driver.name = drv->name;
     85	drv->driver.bus = &zorro_bus_type;
     86
     87	/* register with core */
     88	return driver_register(&drv->driver);
     89}
     90EXPORT_SYMBOL(zorro_register_driver);
     91
     92
     93    /**
     94     *  zorro_unregister_driver - unregister a zorro driver
     95     *  @drv: the driver structure to unregister
     96     *
     97     *  Deletes the driver structure from the list of registered Zorro drivers,
     98     *  gives it a chance to clean up by calling its remove() function for
     99     *  each device it was responsible for, and marks those devices as
    100     *  driverless.
    101     */
    102
    103void zorro_unregister_driver(struct zorro_driver *drv)
    104{
    105	driver_unregister(&drv->driver);
    106}
    107EXPORT_SYMBOL(zorro_unregister_driver);
    108
    109
    110    /**
    111     *  zorro_bus_match - Tell if a Zorro device structure has a matching Zorro
    112     *                    device id structure
    113     *  @ids: array of Zorro device id structures to search in
    114     *  @dev: the Zorro device structure to match against
    115     *
    116     *  Used by the driver core to check whether a Zorro device present in the
    117     *  system is in a driver's list of supported devices.  Returns 1 if
    118     *  supported, and 0 if there is no match.
    119     */
    120
    121static int zorro_bus_match(struct device *dev, struct device_driver *drv)
    122{
    123	struct zorro_dev *z = to_zorro_dev(dev);
    124	struct zorro_driver *zorro_drv = to_zorro_driver(drv);
    125	const struct zorro_device_id *ids = zorro_drv->id_table;
    126
    127	if (!ids)
    128		return 0;
    129
    130	return !!zorro_match_device(ids, z);
    131}
    132
    133static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env)
    134{
    135	struct zorro_dev *z;
    136
    137	if (!dev)
    138		return -ENODEV;
    139
    140	z = to_zorro_dev(dev);
    141	if (!z)
    142		return -ENODEV;
    143
    144	if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) ||
    145	    add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) ||
    146	    add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) ||
    147	    add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id))
    148		return -ENOMEM;
    149
    150	return 0;
    151}
    152
    153struct bus_type zorro_bus_type = {
    154	.name		= "zorro",
    155	.dev_name	= "zorro",
    156	.dev_groups	= zorro_device_attribute_groups,
    157	.match		= zorro_bus_match,
    158	.uevent		= zorro_uevent,
    159	.probe		= zorro_device_probe,
    160	.remove		= zorro_device_remove,
    161};
    162EXPORT_SYMBOL(zorro_bus_type);
    163
    164
    165static int __init zorro_driver_init(void)
    166{
    167	return bus_register(&zorro_bus_type);
    168}
    169
    170postcore_initcall(zorro_driver_init);
    171