![Alexander Beregalov](/assets/img/avatar_default.png)
Cc: David Kiliani <mail@davidkiliani.de> Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
207 lines
5.1 KiB
C
207 lines
5.1 KiB
C
/**
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* @file me1000_device.c
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*
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* @brief ME-1000 device class implementation.
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* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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* @author Guenter Gebhardt
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* @author Krzysztof Gantzke (k.gantzke@meilhaus.de)
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*/
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/*
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* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __KERNEL__
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# define __KERNEL__
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#endif
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#ifndef MODULE
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# define MODULE
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#endif
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include "meids.h"
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#include "meerror.h"
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#include "mecommon.h"
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#include "meinternal.h"
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#include "medebug.h"
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#include "medevice.h"
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#include "me1000_device.h"
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#include "mesubdevice.h"
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#include "me1000_dio.h"
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static int me1000_config_load(me_device_t *me_device, struct file *filep,
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me_cfg_device_entry_t *config)
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{
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me1000_device_t *me1000_device;
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me1000_dio_subdevice_t *dio;
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PDEBUG("executed.\n");
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me1000_device = (me1000_device_t *) me_device;
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if (config->count == 2) {
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if (me_slist_get_number_subdevices(&me1000_device->base.slist)
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== 2) {
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// Nothing to do.
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} else {
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// Remove 2 extra subdevices
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dio =
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(me1000_dio_subdevice_t *)
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me_slist_del_subdevice_tail(&me1000_device->base.
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slist);
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if (dio)
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dio->base.
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me_subdevice_destructor((me_subdevice_t *)
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dio);
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dio =
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(me1000_dio_subdevice_t *)
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me_slist_del_subdevice_tail(&me1000_device->base.
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slist);
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if (dio)
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dio->base.
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me_subdevice_destructor((me_subdevice_t *)
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dio);
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}
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} else if (config->count == 4) {
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//Add 2 subdevices
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if (me_slist_get_number_subdevices(&me1000_device->base.slist)
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== 2) {
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dio =
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me1000_dio_constructor(me1000_device->base.info.pci.
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reg_bases[2], 2,
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&me1000_device->ctrl_lock);
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if (!dio) {
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PERROR("Cannot create dio subdevice.\n");
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return ME_ERRNO_INTERNAL;
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}
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me_slist_add_subdevice_tail(&me1000_device->base.slist,
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(me_subdevice_t *) dio);
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dio =
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me1000_dio_constructor(me1000_device->base.info.pci.
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reg_bases[2], 3,
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&me1000_device->ctrl_lock);
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if (!dio) {
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dio =
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(me1000_dio_subdevice_t *)
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me_slist_del_subdevice_tail(&me1000_device->
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base.slist);
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if (dio)
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dio->base.
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me_subdevice_destructor((me_subdevice_t *) dio);
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PERROR("Cannot create dio subdevice.\n");
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return ME_ERRNO_INTERNAL;
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}
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me_slist_add_subdevice_tail(&me1000_device->base.slist,
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(me_subdevice_t *) dio);
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} else {
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// Nothing to do.
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}
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} else {
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PERROR("Invalid configuration.\n");
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return ME_ERRNO_INTERNAL;
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}
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return ME_ERRNO_SUCCESS;
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}
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me_device_t *me1000_pci_constructor(struct pci_dev * pci_device)
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{
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me1000_device_t *me1000_device;
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me_subdevice_t *subdevice;
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int err;
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int i;
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PDEBUG("executed.\n");
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// Allocate structure for device instance.
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me1000_device = kmalloc(sizeof(me1000_device_t), GFP_KERNEL);
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if (!me1000_device) {
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PERROR("Cannot get memory for ME-1000 device instance.\n");
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return NULL;
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}
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memset(me1000_device, 0, sizeof(me1000_device_t));
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// Initialize base class structure.
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err = me_device_pci_init((me_device_t *) me1000_device, pci_device);
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if (err) {
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kfree(me1000_device);
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PERROR("Cannot initialize device base class.\n");
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return NULL;
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}
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// Initialize spin lock .
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spin_lock_init(&me1000_device->ctrl_lock);
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for (i = 0; i < 4; i++) {
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subdevice =
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(me_subdevice_t *) me1000_dio_constructor(me1000_device->
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base.info.pci.
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reg_bases[2], i,
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&me1000_device->
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ctrl_lock);
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if (!subdevice) {
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me_device_deinit((me_device_t *) me1000_device);
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kfree(me1000_device);
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PERROR("Cannot get memory for subdevice.\n");
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return NULL;
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}
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me_slist_add_subdevice_tail(&me1000_device->base.slist,
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subdevice);
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}
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// Overwrite base class methods.
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me1000_device->base.me_device_config_load = me1000_config_load;
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return (me_device_t *) me1000_device;
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}
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EXPORT_SYMBOL(me1000_pci_constructor);
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// Init and exit of module.
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static int __init me1000_init(void)
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{
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PDEBUG("executed.\n");
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return 0;
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}
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static void __exit me1000_exit(void)
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{
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PDEBUG("executed.\n");
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}
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module_init(me1000_init);
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module_exit(me1000_exit);
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// Administrative stuff for modinfo.
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MODULE_AUTHOR
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("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>");
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MODULE_DESCRIPTION("Device Driver Module for Meilhaus ME-1000 Devices");
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MODULE_SUPPORTED_DEVICE("Meilhaus ME-1000 Digital I/O Devices");
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MODULE_LICENSE("GPL");
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