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