drivers/parport/parport_cs.c - linux/kernel/git/gregkh/char-misc - Git at Google

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

     A driver for PCMCIA parallel port adapters

     (specifically, for the Quatech SPP-100 EPP card: other cards will
     probably require driver tweaks)

     parport_cs.c 1.29 2002/10/11 06:57:41

     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.

     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/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/ptrace.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/timer.h>
 #include <linux/ioport.h>
 #include <linux/major.h>

 #include <linux/parport.h>
 #include <linux/parport_pc.h>

 #include <pcmcia/cs_types.h>
 #include <pcmcia/cs.h>
 #include <pcmcia/cistpl.h>
 #include <pcmcia/ds.h>
 #include <pcmcia/cisreg.h>
 #include <pcmcia/ciscode.h>

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

 /* Module parameters */

 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
 MODULE_DESCRIPTION("PCMCIA parallel port card driver");
 MODULE_LICENSE("Dual MPL/GPL");

 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)

 INT_MODULE_PARM(epp_mode, 1);

 #ifdef PCMCIA_DEBUG
 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
 static char *version =
 "parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
 #else
 #define DEBUG(n, args...)
 #endif

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

 #define FORCE_EPP_MODE	0x08

 typedef struct parport_info_t {
     dev_link_t		link;
     int			ndev;
     dev_node_t		node;
     struct parport	*port;
 } parport_info_t;

 static void parport_detach(struct pcmcia_device *p_dev);
 static void parport_config(dev_link_t *link);
 static void parport_cs_release(dev_link_t *);

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

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

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

 static int parport_attach(struct pcmcia_device *p_dev)
 {
     parport_info_t *info;
     dev_link_t *link;

     DEBUG(0, "parport_attach()\n");

     /* Create new parport device */
     info = kmalloc(sizeof(*info), GFP_KERNEL);
     if (!info) return -ENOMEM;
     memset(info, 0, sizeof(*info));
     link = &info->link; link->priv = info;

     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
     link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
     link->conf.Attributes = CONF_ENABLE_IRQ;
     link->conf.Vcc = 50;
     link->conf.IntType = INT_MEMORY_AND_IO;

     link->handle = p_dev;
     p_dev->instance = link;

     link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
     parport_config(link);

     return 0;
 } /* parport_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 parport_detach(struct pcmcia_device *p_dev)
 {
     dev_link_t *link = dev_to_instance(p_dev);

     DEBUG(0, "parport_detach(0x%p)\n", link);

     if (link->state & DEV_CONFIG)
 	parport_cs_release(link);

     kfree(link->priv);
 } /* parport_detach */

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

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

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

 #define CS_CHECK(fn, ret) \
 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

 void parport_config(dev_link_t *link)
 {
     client_handle_t handle = link->handle;
     parport_info_t *info = link->priv;
     tuple_t tuple;
     u_short buf[128];
     cisparse_t parse;
     config_info_t conf;
     cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
     cistpl_cftable_entry_t dflt = { 0 };
     struct parport *p;
     int last_ret, last_fn;

     DEBUG(0, "parport_config(0x%p)\n", link);

     tuple.TupleData = (cisdata_t *)buf;
     tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
     tuple.Attributes = 0;
     tuple.DesiredTuple = CISTPL_CONFIG;
     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
     CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
     CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
     link->conf.ConfigBase = parse.config.base;
     link->conf.Present = parse.config.rmask[0];

     /* Configure card */
     link->state |= DEV_CONFIG;

     /* Not sure if this is right... look up the current Vcc */
     CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));

     tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
     tuple.Attributes = 0;
     CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
     while (1) {
 	if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
 		pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
 	    goto next_entry;

 	if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 	    cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 	    link->conf.ConfigIndex = cfg->index;
 	    if (epp_mode)
 		link->conf.ConfigIndex |= FORCE_EPP_MODE;
 	    link->io.BasePort1 = io->win[0].base;
 	    link->io.NumPorts1 = io->win[0].len;
 	    link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 	    if (io->nwin == 2) {
 		link->io.BasePort2 = io->win[1].base;
 		link->io.NumPorts2 = io->win[1].len;
 	    }
 	    if (pcmcia_request_io(link->handle, &link->io) != 0)
 		goto next_entry;
 	    /* If we've got this far, we're done */
 	    break;
 	}

     next_entry:
 	if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 	CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
     }

     CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
     CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));

     release_region(link->io.BasePort1, link->io.NumPorts1);
     if (link->io.NumPorts2)
 	release_region(link->io.BasePort2, link->io.NumPorts2);
     p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
 			      link->irq.AssignedIRQ, PARPORT_DMA_NONE,
 			      NULL);
     if (p == NULL) {
 	printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
 	       "0x%3x, irq %u failed\n", link->io.BasePort1,
 	       link->irq.AssignedIRQ);
 	goto failed;
     }

     p->modes |= PARPORT_MODE_PCSPP;
     if (epp_mode)
 	p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP;
     info->ndev = 1;
     info->node.major = LP_MAJOR;
     info->node.minor = p->number;
     info->port = p;
     strcpy(info->node.dev_name, p->name);
     link->dev = &info->node;

     link->state &= ~DEV_CONFIG_PENDING;
     return;

 cs_failed:
     cs_error(link->handle, last_fn, last_ret);
 failed:
     parport_cs_release(link);
     link->state &= ~DEV_CONFIG_PENDING;

 } /* parport_config */

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

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

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

 void parport_cs_release(dev_link_t *link)
 {
     parport_info_t *info = link->priv;

     DEBUG(0, "parport_release(0x%p)\n", link);

     if (info->ndev) {
 	struct parport *p = info->port;
 	parport_pc_unregister_port(p);
 	request_region(link->io.BasePort1, link->io.NumPorts1,
 		       info->node.dev_name);
 	if (link->io.NumPorts2)
 	    request_region(link->io.BasePort2, link->io.NumPorts2,
 			   info->node.dev_name);
     }
     info->ndev = 0;
     link->dev = NULL;

     pcmcia_release_configuration(link->handle);
     pcmcia_release_io(link->handle, &link->io);
     pcmcia_release_irq(link->handle, &link->irq);

     link->state &= ~DEV_CONFIG;

 } /* parport_cs_release */

 static int parport_suspend(struct pcmcia_device *dev)
 {
 	dev_link_t *link = dev_to_instance(dev);

 	link->state |= DEV_SUSPEND;
 	if (link->state & DEV_CONFIG)
 		pcmcia_release_configuration(link->handle);

 	return 0;
 }

 static int parport_resume(struct pcmcia_device *dev)
 {
 	dev_link_t *link = dev_to_instance(dev);

 	link->state &= ~DEV_SUSPEND;
 	if (DEV_OK(link))
 		pcmcia_request_configuration(link->handle, &link->conf);

 	return 0;
 }

 static struct pcmcia_device_id parport_ids[] = {
 	PCMCIA_DEVICE_FUNC_ID(3),
 	PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
 	PCMCIA_DEVICE_NULL
 };
 MODULE_DEVICE_TABLE(pcmcia, parport_ids);

 static struct pcmcia_driver parport_cs_driver = {
 	.owner		= THIS_MODULE,
 	.drv		= {
 		.name	= "parport_cs",
 	},
 	.probe		= parport_attach,
 	.remove		= parport_detach,
 	.id_table	= parport_ids,
 	.suspend	= parport_suspend,
 	.resume		= parport_resume,
 };

 static int __init init_parport_cs(void)
 {
 	return pcmcia_register_driver(&parport_cs_driver);
 }

 static void __exit exit_parport_cs(void)
 {
 	pcmcia_unregister_driver(&parport_cs_driver);
 }

 module_init(init_parport_cs);
 module_exit(exit_parport_cs);
	/*======================================================================

	A driver for PCMCIA parallel port adapters

	(specifically, for the Quatech SPP-100 EPP card: other cards will
	probably require driver tweaks)

	parport_cs.c 1.29 2002/10/11 06:57:41

	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.

	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/kernel.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/sched.h>
	#include <linux/ptrace.h>
	#include <linux/slab.h>
	#include <linux/string.h>
	#include <linux/timer.h>
	#include <linux/ioport.h>
	#include <linux/major.h>

	#include <linux/parport.h>
	#include <linux/parport_pc.h>

	#include <pcmcia/cs_types.h>
	#include <pcmcia/cs.h>
	#include <pcmcia/cistpl.h>
	#include <pcmcia/ds.h>
	#include <pcmcia/cisreg.h>
	#include <pcmcia/ciscode.h>

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

	/* Module parameters */

	MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
	MODULE_DESCRIPTION("PCMCIA parallel port card driver");
	MODULE_LICENSE("Dual MPL/GPL");

	#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)

	INT_MODULE_PARM(epp_mode, 1);

	#ifdef PCMCIA_DEBUG
	INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
	#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
	static char *version =
	"parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)";
	#else
	#define DEBUG(n, args...)
	#endif

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

	#define FORCE_EPP_MODE 0x08

	typedef struct parport_info_t {
	dev_link_t link;
	int ndev;
	dev_node_t node;
	struct parport *port;
	} parport_info_t;

	static void parport_detach(struct pcmcia_device *p_dev);
	static void parport_config(dev_link_t *link);
	static void parport_cs_release(dev_link_t *);

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

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

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

	static int parport_attach(struct pcmcia_device *p_dev)
	{
	parport_info_t *info;
	dev_link_t *link;

	DEBUG(0, "parport_attach()\n");

	/* Create new parport device */
	info = kmalloc(sizeof(*info), GFP_KERNEL);
	if (!info) return -ENOMEM;
	memset(info, 0, sizeof(*info));
	link = &info->link; link->priv = info;

	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
	link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
	link->conf.Attributes = CONF_ENABLE_IRQ;
	link->conf.Vcc = 50;
	link->conf.IntType = INT_MEMORY_AND_IO;

	link->handle = p_dev;
	p_dev->instance = link;

	link->state \|= DEV_PRESENT \| DEV_CONFIG_PENDING;
	parport_config(link);

	return 0;
	} /* parport_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 parport_detach(struct pcmcia_device *p_dev)
	{
	dev_link_t *link = dev_to_instance(p_dev);

	DEBUG(0, "parport_detach(0x%p)\n", link);

	if (link->state & DEV_CONFIG)
	parport_cs_release(link);

	kfree(link->priv);
	} /* parport_detach */

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

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

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

	#define CS_CHECK(fn, ret) \
	do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

	void parport_config(dev_link_t *link)
	{
	client_handle_t handle = link->handle;
	parport_info_t *info = link->priv;
	tuple_t tuple;
	u_short buf[128];
	cisparse_t parse;
	config_info_t conf;
	cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
	cistpl_cftable_entry_t dflt = { 0 };
	struct parport *p;
	int last_ret, last_fn;

	DEBUG(0, "parport_config(0x%p)\n", link);

	tuple.TupleData = (cisdata_t *)buf;
	tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
	tuple.Attributes = 0;
	tuple.DesiredTuple = CISTPL_CONFIG;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
	CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
	CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
	link->conf.ConfigBase = parse.config.base;
	link->conf.Present = parse.config.rmask[0];

	/* Configure card */
	link->state \|= DEV_CONFIG;

	/* Not sure if this is right... look up the current Vcc */
	CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));

	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	tuple.Attributes = 0;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
	while (1) {
	if (pcmcia_get_tuple_data(handle, &tuple) != 0 \|\|
	pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
	goto next_entry;

	if ((cfg->io.nwin > 0) \|\| (dflt.io.nwin > 0)) {
	cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
	link->conf.ConfigIndex = cfg->index;
	if (epp_mode)
	link->conf.ConfigIndex \|= FORCE_EPP_MODE;
	link->io.BasePort1 = io->win[0].base;
	link->io.NumPorts1 = io->win[0].len;
	link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
	if (io->nwin == 2) {
	link->io.BasePort2 = io->win[1].base;
	link->io.NumPorts2 = io->win[1].len;
	}
	if (pcmcia_request_io(link->handle, &link->io) != 0)
	goto next_entry;
	/* If we've got this far, we're done */
	break;
	}

	next_entry:
	if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
	CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
	}

	CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
	CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));

	release_region(link->io.BasePort1, link->io.NumPorts1);
	if (link->io.NumPorts2)
	release_region(link->io.BasePort2, link->io.NumPorts2);
	p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2,
	link->irq.AssignedIRQ, PARPORT_DMA_NONE,
	NULL);
	if (p == NULL) {
	printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at "
	"0x%3x, irq %u failed\n", link->io.BasePort1,
	link->irq.AssignedIRQ);
	goto failed;
	}

	p->modes \|= PARPORT_MODE_PCSPP;
	if (epp_mode)
	p->modes \|= PARPORT_MODE_TRISTATE \| PARPORT_MODE_EPP;
	info->ndev = 1;
	info->node.major = LP_MAJOR;
	info->node.minor = p->number;
	info->port = p;
	strcpy(info->node.dev_name, p->name);
	link->dev = &info->node;

	link->state &= ~DEV_CONFIG_PENDING;
	return;

	cs_failed:
	cs_error(link->handle, last_fn, last_ret);
	failed:
	parport_cs_release(link);
	link->state &= ~DEV_CONFIG_PENDING;

	} /* parport_config */

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

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

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

	void parport_cs_release(dev_link_t *link)
	{
	parport_info_t *info = link->priv;

	DEBUG(0, "parport_release(0x%p)\n", link);

	if (info->ndev) {
	struct parport *p = info->port;
	parport_pc_unregister_port(p);
	request_region(link->io.BasePort1, link->io.NumPorts1,
	info->node.dev_name);
	if (link->io.NumPorts2)
	request_region(link->io.BasePort2, link->io.NumPorts2,
	info->node.dev_name);
	}
	info->ndev = 0;
	link->dev = NULL;

	pcmcia_release_configuration(link->handle);
	pcmcia_release_io(link->handle, &link->io);
	pcmcia_release_irq(link->handle, &link->irq);

	link->state &= ~DEV_CONFIG;

	} /* parport_cs_release */

	static int parport_suspend(struct pcmcia_device *dev)
	{
	dev_link_t *link = dev_to_instance(dev);

	link->state \|= DEV_SUSPEND;
	if (link->state & DEV_CONFIG)
	pcmcia_release_configuration(link->handle);

	return 0;
	}

	static int parport_resume(struct pcmcia_device *dev)
	{
	dev_link_t *link = dev_to_instance(dev);

	link->state &= ~DEV_SUSPEND;
	if (DEV_OK(link))
	pcmcia_request_configuration(link->handle, &link->conf);

	return 0;
	}

	static struct pcmcia_device_id parport_ids[] = {
	PCMCIA_DEVICE_FUNC_ID(3),
	PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003),
	PCMCIA_DEVICE_NULL
	};
	MODULE_DEVICE_TABLE(pcmcia, parport_ids);

	static struct pcmcia_driver parport_cs_driver = {
	.owner = THIS_MODULE,
	.drv = {
	.name = "parport_cs",
	},
	.probe = parport_attach,
	.remove = parport_detach,
	.id_table = parport_ids,
	.suspend = parport_suspend,
	.resume = parport_resume,
	};

	static int __init init_parport_cs(void)
	{
	return pcmcia_register_driver(&parport_cs_driver);
	}

	static void __exit exit_parport_cs(void)
	{
	pcmcia_unregister_driver(&parport_cs_driver);
	}

	module_init(init_parport_cs);
	module_exit(exit_parport_cs);