drivers/staging/meilhaus/me6000_device.c

   1 /**
   2  * @file me6000_device.c
   3  *
   4  * @brief Device class template implementation.
   5  * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
   6  * @author Guenter Gebhardt
   7  * @author Krzysztof Gantzke    (k.gantzke@meilhaus.de)
   8  */
   9
  10 /*
  11  * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
  12  *
  13  * This file is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #ifndef __KERNEL__
  29 #  define __KERNEL__
  30 #endif
  31
  32 #ifndef MODULE
  33 #  define MODULE
  34 #endif
  35
  36 #include <linux/module.h>
  37
  38 #include <linux/pci.h>
  39 #include <linux/slab.h>
  40
  41 #include "meids.h"
  42 #include "meerror.h"
  43 #include "mecommon.h"
  44 #include "meinternal.h"
  45
  46 #include "mefirmware.h"
  47
  48 #include "mesubdevice.h"
  49 #include "medebug.h"
  50 #include "medevice.h"
  51 #include "me6000_reg.h"
  52 #include "me6000_device.h"
  53 #include "meplx_reg.h"
  54 #include "me6000_dio.h"
  55 #include "me6000_ao.h"
  56
  57 /**
  58  * @brief Global variable.
  59  * This is working queue for runing a separate atask that will be responsible for work status (start, stop, timeouts).
  60  */
  61 static struct workqueue_struct *me6000_workqueue;
  62
  63 me_device_t *me6000_pci_constructor(struct pci_dev *pci_device)
  64 {
  65         me6000_device_t *me6000_device;
  66         me_subdevice_t *subdevice;
  67         unsigned int version_idx;
  68         int err;
  69         int i;
  70         int high_range = 0;
  71         int fifo;
  72
  73         PDEBUG("executed.\n");
  74
  75         // Allocate structure for device instance.
  76         me6000_device = kmalloc(sizeof(me6000_device_t), GFP_KERNEL);
  77
  78         if (!me6000_device) {
  79                 PERROR("Cannot get memory for device instance.\n");
  80                 return NULL;
  81         }
  82
  83         memset(me6000_device, 0, sizeof(me6000_device_t));
  84
  85         // Initialize base class structure.
  86         err = me_device_pci_init((me_device_t *) me6000_device, pci_device);
  87
  88         if (err) {
  89                 kfree(me6000_device);
  90                 PERROR("Cannot initialize device base class.\n");
  91                 return NULL;
  92         }
  93
  94         /* Download the xilinx firmware */
  95         err = me_xilinx_download(me6000_device->base.info.pci.reg_bases[1],
  96                                  me6000_device->base.info.pci.reg_bases[2],
  97                                  &pci_device->dev, "me6000.bin");
  98
  99         if (err) {
 100                 me_device_deinit((me_device_t *) me6000_device);
 101                 kfree(me6000_device);
 102                 PERROR("Can't download firmware.\n");
 103                 return NULL;
 104         }
 105
 106         /* Get the index in the device version information table. */
 107         version_idx =
 108             me6000_versions_get_device_index(me6000_device->base.info.pci.
 109                                              device_id);
 110
 111         // Initialize spin lock .
 112         spin_lock_init(&me6000_device->preload_reg_lock);
 113         spin_lock_init(&me6000_device->dio_ctrl_reg_lock);
 114
 115         /* Create digital input/output instances. */
 116         for (i = 0; i < me6000_versions[version_idx].dio_subdevices; i++) {
 117                 subdevice =
 118                     (me_subdevice_t *) me6000_dio_constructor(me6000_device->
 119                                                               base.info.pci.
 120                                                               reg_bases[3], i,
 121                                                               &me6000_device->
 122                                                               dio_ctrl_reg_lock);
 123
 124                 if (!subdevice) {
 125                         me_device_deinit((me_device_t *) me6000_device);
 126                         kfree(me6000_device);
 127                         PERROR("Cannot get memory for subdevice.\n");
 128                         return NULL;
 129                 }
 130
 131                 me_slist_add_subdevice_tail(&me6000_device->base.slist,
 132                                             subdevice);
 133         }
 134
 135         /* Create analog output instances. */
 136         for (i = 0; i < me6000_versions[version_idx].ao_subdevices; i++) {
 137                 high_range = ((i == 8)
 138                               &&
 139                               ((me6000_device->base.info.pci.device_id ==
 140                                 PCI_DEVICE_ID_MEILHAUS_ME6359)
 141                                || (me6000_device->base.info.pci.device_id ==
 142                                    PCI_DEVICE_ID_MEILHAUS_ME6259)
 143                               )
 144                     )? 1 : 0;
 145
 146                 fifo =
 147                     (i <
 148                      me6000_versions[version_idx].
 149                      ao_fifo) ? ME6000_AO_HAS_FIFO : 0x0;
 150                 fifo |= (i < 4) ? ME6000_AO_EXTRA_HARDWARE : 0x0;
 151
 152                 subdevice =
 153                     (me_subdevice_t *) me6000_ao_constructor(me6000_device->
 154                                                              base.info.pci.
 155                                                              reg_bases[2],
 156                                                              &me6000_device->
 157                                                              preload_reg_lock,
 158                                                              &me6000_device->
 159                                                              preload_flags,
 160                                                              &me6000_device->
 161                                                              triggering_flags,
 162                                                              i, fifo,
 163                                                              me6000_device->
 164                                                              base.irq,
 165                                                              high_range,
 166                                                              me6000_workqueue);
 167
 168                 if (!subdevice) {
 169                         me_device_deinit((me_device_t *) me6000_device);
 170                         kfree(me6000_device);
 171                         PERROR("Cannot get memory for subdevice.\n");
 172                         return NULL;
 173                 }
 174
 175                 me_slist_add_subdevice_tail(&me6000_device->base.slist,
 176                                             subdevice);
 177         }
 178
 179         return (me_device_t *) me6000_device;
 180 }
 181 EXPORT_SYMBOL(me6000_pci_constructor);
 182
 183 // Init and exit of module.
 184
 185 static int __init me6000_init(void)
 186 {
 187         PDEBUG("executed.\n");
 188
 189         me6000_workqueue = create_singlethread_workqueue("me6000");
 190         return 0;
 191 }
 192
 193 static void __exit me6000_exit(void)
 194 {
 195         PDEBUG("executed.\n");
 196
 197         flush_workqueue(me6000_workqueue);
 198         destroy_workqueue(me6000_workqueue);
 199 }
 200
 201 module_init(me6000_init);
 202 module_exit(me6000_exit);
 203
 204 // Administrative stuff for modinfo.
 205 MODULE_AUTHOR
 206     ("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>");
 207 MODULE_DESCRIPTION("Device Driver Module for ME-6000 Device");
 208 MODULE_SUPPORTED_DEVICE("Meilhaus ME-6000 Devices");
 209 MODULE_LICENSE("GPL");