diff options
Diffstat (limited to 'drivers/staging/meilhaus/me1000_device.c')
| -rw-r--r-- | drivers/staging/meilhaus/me1000_device.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me1000_device.c b/drivers/staging/meilhaus/me1000_device.c new file mode 100644 index 000000000000..c44e214af26c --- /dev/null +++ b/drivers/staging/meilhaus/me1000_device.c @@ -0,0 +1,208 @@ +/** + * @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); |