LXR linux/drivers/staging/meilhaus/metempl

   1/**
   2 * @file metempl_device.c
   3 *
   4 * @brief template device class implementation.
   5 * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
   6 * @author Guenter Gebhardt
   7 */
   8
   9/*
  10 * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
  11 *
  12 * This file is free software; you can redistribute it and/or modify
  13 * it under the terms of the GNU General Public License as published by
  14 * the Free Software Foundation; either version 2 of the License, or
  15 * (at your option) any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 *
  22 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25 */
  26
  27#ifndef __KERNEL__
  28#  define __KERNEL__
  29#endif
  30
  31#ifndef MODULE
  32#  define MODULE
  33#endif
  34
  35#include <linux/module.h>
  36
  37#include <linux/pci.h>
  38#include <linux/slab.h>
  39
  40#include <meids.h>
  41#include "meerror.h"
  42#include "mecommon.h"
  43#include "meinternal.h"
  44
  45#include "medebug.h"
  46#include "medevice.h"
  47#include "metempl_device.h"
  48#include "mesubdevice.h"
  49#include "metempl_sub.h"
  50
  51me_device_t *metempl_pci_constructor(struct pci_dev *pci_device)
  52{
  53        metempl_device_t *metempl_device;
  54        me_subdevice_t *subdevice;
  55        unsigned int version_idx;
  56        int err;
  57        int i;
  58
  59        PDEBUG("executed.\n");
  60
  61        // Allocate structure for device instance.
  62        metempl_device = kmalloc(sizeof(metempl_device_t), GFP_KERNEL);
  63
  64        if (!metempl_device) {
  65                PERROR("Cannot get memory for device instance.\n");
  66                return NULL;
  67        }
  68
  69        memset(metempl_device, 0, sizeof(metempl_device_t));
  70
  71        // Initialize base class structure.
  72        err = me_device_pci_init((me_device_t *) metempl_device, pci_device);
  73
  74        if (err) {
  75                kfree(metempl_device);
  76                PERROR("Cannot initialize device base class.\n");
  77                return NULL;
  78        }
  79
  80        /* Get the index in the device version information table. */
  81        version_idx =
  82            metempl_versions_get_device_index(metempl_device->base.info.pci.
  83                                              device_id);
  84
  85        // Initialize spin lock .
  86        spin_lock_init(&metempl_device->ctrl_reg_lock);
  87
  88        // Create subdevice instances.
  89        for (i = 0; i < metempl_versions[version_idx].subdevices; i++) {
  90                subdevice =
  91                    (me_subdevice_t *) metempl_sub_constructor(metempl_device->
  92                                                               base.info.pci.
  93                                                               reg_bases[2], i,
  94                                                               &metempl_device->
  95                                                               ctrl_reg_lock);
  96
  97                if (!subdevice) {
  98                        me_device_deinit((me_device_t *) metempl_device);
  99                        kfree(metempl_device);
 100                        PERROR("Cannot get memory for subdevice.\n");
 101                        return NULL;
 102                }
 103
 104                me_slist_add_subdevice_tail(&metempl_device->base.slist,
 105                                            subdevice);
 106        }
 107
 108        /* Overwrite base class methods if applicable. */
 109
 110        return (me_device_t *) metempl_device;
 111}
 112
 113// Init and exit of module.
 114
 115static int __init metempl_init(void)
 116{
 117        PDEBUG("executed.\n.");
 118        return 0;
 119}
 120
 121static void __exit metempl_exit(void)
 122{
 123        PDEBUG("executed.\n.");
 124}
 125
 126module_init(metempl_init);
 127
 128module_exit(metempl_exit);
 129
 130// Administrative stuff for modinfo.
 131MODULE_AUTHOR("Guenter Gebhardt <g.gebhardt@meilhaus.de>");
 132MODULE_DESCRIPTION("Device Driver Module for Template Device");
 133MODULE_SUPPORTED_DEVICE("Meilhaus Template Devices");
 134MODULE_LICENSE("GPL");
 135
 136// Export the constructor.
 137EXPORT_SYMBOL(metempl_pci_constructor);
 138