[deliverable/linux.git] / drivers / staging / meilhaus / me1000_device.c

/**
 * @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;
}
EXPORT_SYMBOL(me1000_pci_constructor);

// 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");
Commit	Line	Data
3fedd148 DK	1	/**
	2	* @file me1000_device.c
	3	*
	4	* @brief ME-1000 device class 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 "medebug.h"
	47	#include "medevice.h"
	48	#include "me1000_device.h"
	49	#include "mesubdevice.h"
	50	#include "me1000_dio.h"
	51
451084d2 AB	52	static int me1000_config_load(me_device_t me_device, struct file filep,
451084d2 AB	53	me_cfg_device_entry_t *config)
3fedd148 DK	54	{
	55	me1000_device_t *me1000_device;
	56	me1000_dio_subdevice_t *dio;
	57
	58	PDEBUG("executed.\n");
	59
	60	me1000_device = (me1000_device_t *) me_device;
	61
	62	if (config->count == 2) {
	63	if (me_slist_get_number_subdevices(&me1000_device->base.slist)
	64	== 2) {
	65	// Nothing to do.
	66	} else {
	67	// Remove 2 extra subdevices
	68	dio =
	69	(me1000_dio_subdevice_t *)
	70	me_slist_del_subdevice_tail(&me1000_device->base.
	71	slist);
	72	if (dio)
	73	dio->base.
	74	me_subdevice_destructor((me_subdevice_t *)
	75	dio);
	76
	77	dio =
	78	(me1000_dio_subdevice_t *)
	79	me_slist_del_subdevice_tail(&me1000_device->base.
	80	slist);
	81	if (dio)
	82	dio->base.
	83	me_subdevice_destructor((me_subdevice_t *)
	84	dio);
	85	}
	86	} else if (config->count == 4) {
	87	//Add 2 subdevices
	88	if (me_slist_get_number_subdevices(&me1000_device->base.slist)
	89	== 2) {
	90	dio =
	91	me1000_dio_constructor(me1000_device->base.info.pci.
	92	reg_bases[2], 2,
	93	&me1000_device->ctrl_lock);
	94	if (!dio) {
	95	PERROR("Cannot create dio subdevice.\n");
	96	return ME_ERRNO_INTERNAL;
	97	}
	98	me_slist_add_subdevice_tail(&me1000_device->base.slist,
	99	(me_subdevice_t *) dio);
	100
	101	dio =
	102	me1000_dio_constructor(me1000_device->base.info.pci.
	103	reg_bases[2], 3,
	104	&me1000_device->ctrl_lock);
	105	if (!dio) {
	106	dio =
	107	(me1000_dio_subdevice_t *)
	108	me_slist_del_subdevice_tail(&me1000_device->
	109	base.slist);
	110	if (dio)
	111	dio->base.
	112	me_subdevice_destructor((me_subdevice_t *) dio);
	113
	114	PERROR("Cannot create dio subdevice.\n");
	115	return ME_ERRNO_INTERNAL;
	116	}
	117	me_slist_add_subdevice_tail(&me1000_device->base.slist,
118	(me_subdevice_t *) dio);
119	} else {
120	// Nothing to do.
121	}
122	} else {
123	PERROR("Invalid configuration.\n");
124	return ME_ERRNO_INTERNAL;
125	}
126
127	return ME_ERRNO_SUCCESS;
128	}
129
130	me_device_t me1000_pci_constructor(struct pci_dev pci_device)
131	{
132	me1000_device_t *me1000_device;
133	me_subdevice_t *subdevice;
134	int err;
135	int i;
136
137	PDEBUG("executed.\n");
138
139	// Allocate structure for device instance.
140	me1000_device = kmalloc(sizeof(me1000_device_t), GFP_KERNEL);
141
142	if (!me1000_device) {
143	PERROR("Cannot get memory for ME-1000 device instance.\n");
144	return NULL;
145	}
146
147	memset(me1000_device, 0, sizeof(me1000_device_t));
148
149	// Initialize base class structure.
150	err = me_device_pci_init((me_device_t *) me1000_device, pci_device);
151
152	if (err) {
153	kfree(me1000_device);
154	PERROR("Cannot initialize device base class.\n");
155	return NULL;
156	}
157	// Initialize spin lock .
158	spin_lock_init(&me1000_device->ctrl_lock);
159
160	for (i = 0; i < 4; i++) {
161	subdevice =
162	(me_subdevice_t *) me1000_dio_constructor(me1000_device->
163	base.info.pci.
164	reg_bases[2], i,
165	&me1000_device->
166	ctrl_lock);
167
168	if (!subdevice) {
169	me_device_deinit((me_device_t *) me1000_device);
170	kfree(me1000_device);
171	PERROR("Cannot get memory for subdevice.\n");
172	return NULL;
173	}
174
175	me_slist_add_subdevice_tail(&me1000_device->base.slist,
176	subdevice);
177	}
178
179	// Overwrite base class methods.
180	me1000_device->base.me_device_config_load = me1000_config_load;
181
182	return (me_device_t *) me1000_device;
183	}
451084d2	184	EXPORT_SYMBOL(me1000_pci_constructor);
3fedd148 DK	185
	186	// Init and exit of module.
	187	static int __init me1000_init(void)
	188	{
	189	PDEBUG("executed.\n");
	190	return 0;
	191	}
	192
	193	static void __exit me1000_exit(void)
	194	{
	195	PDEBUG("executed.\n");
	196	}
	197
	198	module_init(me1000_init);
	199	module_exit(me1000_exit);
	200
	201	// Administrative stuff for modinfo.
	202	MODULE_AUTHOR
	203	("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>");
	204	MODULE_DESCRIPTION("Device Driver Module for Meilhaus ME-1000 Devices");
	205	MODULE_SUPPORTED_DEVICE("Meilhaus ME-1000 Digital I/O Devices");
	206	MODULE_LICENSE("GPL");