drivers/isdn/hisax/elsa_cs.c - linux - Git at Google

 /*======================================================================

     An elsa_cs PCMCIA client driver

     This driver is for the Elsa PCM ISDN Cards, i.e. the MicroLink


     The contents of this file are subject to the Mozilla Public
     License Version 1.1 (the "License"); you may not use this file
     except in compliance with the License. You may obtain a copy of
     the License at http://www.mozilla.org/MPL/

     Software distributed under the License is distributed on an "AS
     IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
     implied. See the License for the specific language governing
     rights and limitations under the License.

     The initial developer of the original code is David A. Hinds
     <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
     are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.

     Modifications from dummy_cs.c are Copyright (C) 1999-2001 Klaus
     Lichtenwalder <Lichtenwalder@ACM.org>. All Rights Reserved.

     Alternatively, the contents of this file may be used under the
     terms of the GNU General Public License version 2 (the "GPL"), in
     which case the provisions of the GPL are applicable instead of the
     above.  If you wish to allow the use of your version of this file
     only under the terms of the GPL and not to allow others to use
     your version of this file under the MPL, indicate your decision
     by deleting the provisions above and replace them with the notice
     and other provisions required by the GPL.  If you do not delete
     the provisions above, a recipient may use your version of this
     file under either the MPL or the GPL.

 ======================================================================*/

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/ptrace.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/timer.h>
 #include <linux/ioport.h>
 #include <asm/io.h>
 #include <asm/system.h>

 #include <pcmcia/cs.h>
 #include <pcmcia/cistpl.h>
 #include <pcmcia/cisreg.h>
 #include <pcmcia/ds.h>
 #include "hisax_cfg.h"

 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
 MODULE_AUTHOR("Klaus Lichtenwalder");
 MODULE_LICENSE("Dual MPL/GPL");


 /*====================================================================*/

 /* Parameters that can be set with 'insmod' */

 static int protocol = 2;        /* EURO-ISDN Default */
 module_param(protocol, int, 0);

 /*====================================================================*/

 /*
    The event() function is this driver's Card Services event handler.
    It will be called by Card Services when an appropriate card status
    event is received.  The config() and release() entry points are
    used to configure or release a socket, in response to card insertion
    and ejection events.  They are invoked from the elsa_cs event
    handler.
 */

 static int elsa_cs_config(struct pcmcia_device *link) __devinit ;
 static void elsa_cs_release(struct pcmcia_device *link);

 /*
    The attach() and detach() entry points are used to create and destroy
    "instances" of the driver, where each instance represents everything
    needed to manage one actual PCMCIA card.
 */

 static void elsa_cs_detach(struct pcmcia_device *p_dev) __devexit;

 typedef struct local_info_t {
 	struct pcmcia_device	*p_dev;
     int                 busy;
     int			cardnr;
 } local_info_t;

 /*======================================================================

     elsa_cs_attach() creates an "instance" of the driver, allocatingx
     local data structures for one device.  The device is registered
     with Card Services.

     The dev_link structure is initialized, but we don't actually
     configure the card at this point -- we wait until we receive a
     card insertion event.

 ======================================================================*/

 static int __devinit elsa_cs_probe(struct pcmcia_device *link)
 {
     local_info_t *local;

     dev_dbg(&link->dev, "elsa_cs_attach()\n");

     /* Allocate space for private device-specific data */
     local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
     if (!local) return -ENOMEM;

     local->p_dev = link;
     link->priv = local;

     local->cardnr = -1;

     /*
       General socket configuration defaults can go here.  In this
       client, we assume very little, and rely on the CIS for almost
       everything.  In most clients, many details (i.e., number, sizes,
       and attributes of IO windows) are fixed by the nature of the
       device, and can be hard-wired here.
     */
     link->io.NumPorts1 = 8;
     link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
     link->io.IOAddrLines = 3;

     link->conf.Attributes = CONF_ENABLE_IRQ;
     link->conf.IntType = INT_MEMORY_AND_IO;

     return elsa_cs_config(link);
 } /* elsa_cs_attach */

 /*======================================================================

     This deletes a driver "instance".  The device is de-registered
     with Card Services.  If it has been released, all local data
     structures are freed.  Otherwise, the structures will be freed
     when the device is released.

 ======================================================================*/

 static void __devexit elsa_cs_detach(struct pcmcia_device *link)
 {
 	local_info_t *info = link->priv;

 	dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);

 	info->busy = 1;
 	elsa_cs_release(link);

 	kfree(info);
 } /* elsa_cs_detach */

 /*======================================================================

     elsa_cs_config() is scheduled to run after a CARD_INSERTION event
     is received, to configure the PCMCIA socket, and to make the
     device available to the system.

 ======================================================================*/

 static int elsa_cs_configcheck(struct pcmcia_device *p_dev,
 			       cistpl_cftable_entry_t *cf,
 			       cistpl_cftable_entry_t *dflt,
 			       unsigned int vcc,
 			       void *priv_data)
 {
 	int j;

 	if ((cf->io.nwin > 0) && cf->io.win[0].base) {
 		printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
 		p_dev->io.BasePort1 = cf->io.win[0].base;
 		if (!pcmcia_request_io(p_dev, &p_dev->io))
 			return 0;
 	} else {
 		printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
 		for (j = 0x2f0; j > 0x100; j -= 0x10) {
 			p_dev->io.BasePort1 = j;
 			if (!pcmcia_request_io(p_dev, &p_dev->io))
 				return 0;
 		}
 	}
 	return -ENODEV;
 }

 static int __devinit elsa_cs_config(struct pcmcia_device *link)
 {
     local_info_t *dev;
     int i;
     IsdnCard_t icard;

     dev_dbg(&link->dev, "elsa_config(0x%p)\n", link);
     dev = link->priv;

     i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
     if (i != 0)
 	goto failed;

     if (!link->irq)
 	goto failed;

     i = pcmcia_request_configuration(link, &link->conf);
     if (i != 0)
 	goto failed;

     /* Finally, report what we've done */
     dev_info(&link->dev, "index 0x%02x: ",
 	    link->conf.ConfigIndex);
     if (link->conf.Attributes & CONF_ENABLE_IRQ)
 	printk(", irq %d", link->irq);
     if (link->io.NumPorts1)
         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
                link->io.BasePort1+link->io.NumPorts1-1);
     if (link->io.NumPorts2)
         printk(" & 0x%04x-0x%04x", link->io.BasePort2,
                link->io.BasePort2+link->io.NumPorts2-1);
     printk("\n");

     icard.para[0] = link->irq;
     icard.para[1] = link->io.BasePort1;
     icard.protocol = protocol;
     icard.typ = ISDN_CTYPE_ELSA_PCMCIA;

     i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
     if (i < 0) {
     	printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
     		i, link->io.BasePort1);
     	elsa_cs_release(link);
     } else
     	((local_info_t*)link->priv)->cardnr = i;

     return 0;
 failed:
     elsa_cs_release(link);
     return -ENODEV;
 } /* elsa_cs_config */

 /*======================================================================

     After a card is removed, elsa_cs_release() will unregister the net
     device, and release the PCMCIA configuration.  If the device is
     still open, this will be postponed until it is closed.

 ======================================================================*/

 static void elsa_cs_release(struct pcmcia_device *link)
 {
     local_info_t *local = link->priv;

     dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);

     if (local) {
     	if (local->cardnr >= 0) {
     	    /* no unregister function with hisax */
 	    HiSax_closecard(local->cardnr);
 	}
     }

     pcmcia_disable_device(link);
 } /* elsa_cs_release */

 static int elsa_suspend(struct pcmcia_device *link)
 {
 	local_info_t *dev = link->priv;

         dev->busy = 1;

 	return 0;
 }

 static int elsa_resume(struct pcmcia_device *link)
 {
 	local_info_t *dev = link->priv;

         dev->busy = 0;

 	return 0;
 }

 static struct pcmcia_device_id elsa_ids[] = {
 	PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
 	PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
 	PCMCIA_DEVICE_NULL
 };
 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);

 static struct pcmcia_driver elsa_cs_driver = {
 	.owner		= THIS_MODULE,
 	.drv		= {
 		.name	= "elsa_cs",
 	},
 	.probe		= elsa_cs_probe,
 	.remove		= __devexit_p(elsa_cs_detach),
 	.id_table	= elsa_ids,
 	.suspend	= elsa_suspend,
 	.resume		= elsa_resume,
 };

 static int __init init_elsa_cs(void)
 {
 	return pcmcia_register_driver(&elsa_cs_driver);
 }

 static void __exit exit_elsa_cs(void)
 {
 	pcmcia_unregister_driver(&elsa_cs_driver);
 }

 module_init(init_elsa_cs);
 module_exit(exit_elsa_cs);
	/*======================================================================

	An elsa_cs PCMCIA client driver

	This driver is for the Elsa PCM ISDN Cards, i.e. the MicroLink


	The contents of this file are subject to the Mozilla Public
	License Version 1.1 (the "License"); you may not use this file
	except in compliance with the License. You may obtain a copy of
	the License at http://www.mozilla.org/MPL/

	Software distributed under the License is distributed on an "AS
	IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
	implied. See the License for the specific language governing
	rights and limitations under the License.

	The initial developer of the original code is David A. Hinds
	<dahinds@users.sourceforge.net>. Portions created by David A. Hinds
	are Copyright (C) 1999 David A. Hinds. All Rights Reserved.

	Modifications from dummy_cs.c are Copyright (C) 1999-2001 Klaus
	Lichtenwalder <Lichtenwalder@ACM.org>. All Rights Reserved.

	Alternatively, the contents of this file may be used under the
	terms of the GNU General Public License version 2 (the "GPL"), in
	which case the provisions of the GPL are applicable instead of the
	above. If you wish to allow the use of your version of this file
	only under the terms of the GPL and not to allow others to use
	your version of this file under the MPL, indicate your decision
	by deleting the provisions above and replace them with the notice
	and other provisions required by the GPL. If you do not delete
	the provisions above, a recipient may use your version of this
	file under either the MPL or the GPL.

	======================================================================*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/ptrace.h>
	#include <linux/slab.h>
	#include <linux/string.h>
	#include <linux/timer.h>
	#include <linux/ioport.h>
	#include <asm/io.h>
	#include <asm/system.h>

	#include <pcmcia/cs.h>
	#include <pcmcia/cistpl.h>
	#include <pcmcia/cisreg.h>
	#include <pcmcia/ds.h>
	#include "hisax_cfg.h"

	MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
	MODULE_AUTHOR("Klaus Lichtenwalder");
	MODULE_LICENSE("Dual MPL/GPL");


	/====================================================================/

	/* Parameters that can be set with 'insmod' */

	static int protocol = 2; /* EURO-ISDN Default */
	module_param(protocol, int, 0);

	/====================================================================/

	/*
	The event() function is this driver's Card Services event handler.
	It will be called by Card Services when an appropriate card status
	event is received. The config() and release() entry points are
	used to configure or release a socket, in response to card insertion
	and ejection events. They are invoked from the elsa_cs event
	handler.
	*/

	static int elsa_cs_config(struct pcmcia_device *link) __devinit ;
	static void elsa_cs_release(struct pcmcia_device *link);

	/*
	The attach() and detach() entry points are used to create and destroy
	"instances" of the driver, where each instance represents everything
	needed to manage one actual PCMCIA card.
	*/

	static void elsa_cs_detach(struct pcmcia_device *p_dev) __devexit;

	typedef struct local_info_t {
	struct pcmcia_device *p_dev;
	int busy;
	int cardnr;
	} local_info_t;

	/*======================================================================

	elsa_cs_attach() creates an "instance" of the driver, allocatingx
	local data structures for one device. The device is registered
	with Card Services.

	The dev_link structure is initialized, but we don't actually
	configure the card at this point -- we wait until we receive a
	card insertion event.

	======================================================================*/

	static int __devinit elsa_cs_probe(struct pcmcia_device *link)
	{
	local_info_t *local;

	dev_dbg(&link->dev, "elsa_cs_attach()\n");

	/* Allocate space for private device-specific data */
	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
	if (!local) return -ENOMEM;

	local->p_dev = link;
	link->priv = local;

	local->cardnr = -1;

	/*
	General socket configuration defaults can go here. In this
	client, we assume very little, and rely on the CIS for almost
	everything. In most clients, many details (i.e., number, sizes,
	and attributes of IO windows) are fixed by the nature of the
	device, and can be hard-wired here.
	*/
	link->io.NumPorts1 = 8;
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
	link->io.IOAddrLines = 3;

	link->conf.Attributes = CONF_ENABLE_IRQ;
	link->conf.IntType = INT_MEMORY_AND_IO;

	return elsa_cs_config(link);
	} /* elsa_cs_attach */

	/*======================================================================

	This deletes a driver "instance". The device is de-registered
	with Card Services. If it has been released, all local data
	structures are freed. Otherwise, the structures will be freed
	when the device is released.

	======================================================================*/

	static void __devexit elsa_cs_detach(struct pcmcia_device *link)
	{
	local_info_t *info = link->priv;

	dev_dbg(&link->dev, "elsa_cs_detach(0x%p)\n", link);

	info->busy = 1;
	elsa_cs_release(link);

	kfree(info);
	} /* elsa_cs_detach */

	/*======================================================================

	elsa_cs_config() is scheduled to run after a CARD_INSERTION event
	is received, to configure the PCMCIA socket, and to make the
	device available to the system.

	======================================================================*/

	static int elsa_cs_configcheck(struct pcmcia_device *p_dev,
	cistpl_cftable_entry_t *cf,
	cistpl_cftable_entry_t *dflt,
	unsigned int vcc,
	void *priv_data)
	{
	int j;

	if ((cf->io.nwin > 0) && cf->io.win[0].base) {
	printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
	p_dev->io.BasePort1 = cf->io.win[0].base;
	if (!pcmcia_request_io(p_dev, &p_dev->io))
	return 0;
	} else {
	printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
	for (j = 0x2f0; j > 0x100; j -= 0x10) {
	p_dev->io.BasePort1 = j;
	if (!pcmcia_request_io(p_dev, &p_dev->io))
	return 0;
	}
	}
	return -ENODEV;
	}

	static int __devinit elsa_cs_config(struct pcmcia_device *link)
	{
	local_info_t *dev;
	int i;
	IsdnCard_t icard;

	dev_dbg(&link->dev, "elsa_config(0x%p)\n", link);
	dev = link->priv;

	i = pcmcia_loop_config(link, elsa_cs_configcheck, NULL);
	if (i != 0)
	goto failed;

	if (!link->irq)
	goto failed;

	i = pcmcia_request_configuration(link, &link->conf);
	if (i != 0)
	goto failed;

	/* Finally, report what we've done */
	dev_info(&link->dev, "index 0x%02x: ",
	link->conf.ConfigIndex);
	if (link->conf.Attributes & CONF_ENABLE_IRQ)
	printk(", irq %d", link->irq);
	if (link->io.NumPorts1)
	printk(", io 0x%04x-0x%04x", link->io.BasePort1,
	link->io.BasePort1+link->io.NumPorts1-1);
	if (link->io.NumPorts2)
	printk(" & 0x%04x-0x%04x", link->io.BasePort2,
	link->io.BasePort2+link->io.NumPorts2-1);
	printk("\n");

	icard.para[0] = link->irq;
	icard.para[1] = link->io.BasePort1;
	icard.protocol = protocol;
	icard.typ = ISDN_CTYPE_ELSA_PCMCIA;

	i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
	if (i < 0) {
	printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
	i, link->io.BasePort1);
	elsa_cs_release(link);
	} else
	((local_info_t*)link->priv)->cardnr = i;

	return 0;
	failed:
	elsa_cs_release(link);
	return -ENODEV;
	} /* elsa_cs_config */

	/*======================================================================

	After a card is removed, elsa_cs_release() will unregister the net
	device, and release the PCMCIA configuration. If the device is
	still open, this will be postponed until it is closed.

	======================================================================*/

	static void elsa_cs_release(struct pcmcia_device *link)
	{
	local_info_t *local = link->priv;

	dev_dbg(&link->dev, "elsa_cs_release(0x%p)\n", link);

	if (local) {
	if (local->cardnr >= 0) {
	/* no unregister function with hisax */
	HiSax_closecard(local->cardnr);
	}
	}

	pcmcia_disable_device(link);
	} /* elsa_cs_release */

	static int elsa_suspend(struct pcmcia_device *link)
	{
	local_info_t *dev = link->priv;

	dev->busy = 1;

	return 0;
	}

	static int elsa_resume(struct pcmcia_device *link)
	{
	local_info_t *dev = link->priv;

	dev->busy = 0;

	return 0;
	}

	static struct pcmcia_device_id elsa_ids[] = {
	PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
	PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
	PCMCIA_DEVICE_NULL
	};
	MODULE_DEVICE_TABLE(pcmcia, elsa_ids);

	static struct pcmcia_driver elsa_cs_driver = {
	.owner = THIS_MODULE,
	.drv = {
	.name = "elsa_cs",
	},
	.probe = elsa_cs_probe,
	.remove = __devexit_p(elsa_cs_detach),
	.id_table = elsa_ids,
	.suspend = elsa_suspend,
	.resume = elsa_resume,
	};

	static int __init init_elsa_cs(void)
	{
	return pcmcia_register_driver(&elsa_cs_driver);
	}

	static void __exit exit_elsa_cs(void)
	{
	pcmcia_unregister_driver(&elsa_cs_driver);
	}

	module_init(init_elsa_cs);
	module_exit(exit_elsa_cs);