kernel/2.6.29.6-aldebaran-rt/drivers/staging/meilhaus/metempl_device.c

   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
  51 me_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
 115 static int __init metempl_init(void)
 116 {
 117         PDEBUG("executed.\n.");
 118         return 0;
 119 }
 120
 121 static void __exit metempl_exit(void)
 122 {
 123         PDEBUG("executed.\n.");
 124 }
 125
 126 module_init(metempl_init);
 127
 128 module_exit(metempl_exit);
 129
 130 // Administrative stuff for modinfo.
 131 MODULE_AUTHOR("Guenter Gebhardt <g.gebhardt@meilhaus.de>");
 132 MODULE_DESCRIPTION("Device Driver Module for Template Device");
 133 MODULE_SUPPORTED_DEVICE("Meilhaus Template Devices");
 134 MODULE_LICENSE("GPL");
 135
 136 // Export the constructor.
 137 EXPORT_SYMBOL(metempl_pci_constructor);