drivers/net/wireless/airo_cs.c - SHIFTPHONES/mainline/linux - Gitiles

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

     Aironet driver for 4500 and 4800 series cards

     This code is released under both the GPL version 2 and BSD licenses.
     Either license may be used.  The respective licenses are found at
     the end of this file.

     This code was developed by Benjamin Reed <breed@users.sourceforge.net>
     including portions of which come from the Aironet PC4500
     Developer's Reference Manual and used with permission.  Copyright
     (C) 1999 Benjamin Reed.  All Rights Reserved.  Permission to use
     code in the Developer's manual was granted for this driver by
     Aironet.

     In addition this module was derived from dummy_cs.
     The initial developer of dummy_cs is David A. Hinds
     <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
     are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.

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

 #include <linux/config.h>
 #ifdef __IN_PCMCIA_PACKAGE__
 #include <pcmcia/k_compat.h>
 #endif
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/ptrace.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/timer.h>
 #include <linux/netdevice.h>

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

 #include <asm/io.h>
 #include <asm/system.h>

 #include "airo.h"

 /*
    All the PCMCIA modules use PCMCIA_DEBUG to control debugging.  If
    you do not define PCMCIA_DEBUG at all, all the debug code will be
    left out.  If you compile with PCMCIA_DEBUG=0, the debug code will
    be present but disabled -- but it can then be enabled for specific
    modules at load time with a 'pc_debug=#' option to insmod.
 */
 #ifdef PCMCIA_DEBUG
 static int pc_debug = PCMCIA_DEBUG;
 module_param(pc_debug, int, 0);
 static char *version = "$Revision: 1.2 $";
 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
 #else
 #define DEBUG(n, args...)
 #endif

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

 MODULE_AUTHOR("Benjamin Reed");
 MODULE_DESCRIPTION("Support for Cisco/Aironet 802.11 wireless ethernet \
                    cards.  This is the module that links the PCMCIA card \
 		   with the airo module.");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_SUPPORTED_DEVICE("Aironet 4500, 4800 and Cisco 340 PCMCIA cards");

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

 /*
    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 airo_cs
    event handler.
 */

 static void airo_config(dev_link_t *link);
 static void airo_release(dev_link_t *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 airo_detach(struct pcmcia_device *p_dev);

 /*
    You'll also need to prototype all the functions that will actually
    be used to talk to your device.  See 'pcmem_cs' for a good example
    of a fully self-sufficient driver; the other drivers rely more or
    less on other parts of the kernel.
 */

 /*
    A linked list of "instances" of the  aironet device.  Each actual
    PCMCIA card corresponds to one device instance, and is described
    by one dev_link_t structure (defined in ds.h).

    You may not want to use a linked list for this -- for example, the
    memory card driver uses an array of dev_link_t pointers, where minor
    device numbers are used to derive the corresponding array index.
 */

 /*
    A driver needs to provide a dev_node_t structure for each device
    on a card.  In some cases, there is only one device per card (for
    example, ethernet cards, modems).  In other cases, there may be
    many actual or logical devices (SCSI adapters, memory cards with
    multiple partitions).  The dev_node_t structures need to be kept
    in a linked list starting at the 'dev' field of a dev_link_t
    structure.  We allocate them in the card's private data structure,
    because they generally shouldn't be allocated dynamically.

    In this case, we also provide a flag to indicate if a device is
    "stopped" due to a power management event, or card ejection.  The
    device IO routines can use a flag like this to throttle IO to a
    card that is not ready to accept it.
 */

 typedef struct local_info_t {
 	dev_node_t	node;
 	struct net_device *eth_dev;
 } local_info_t;

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

   airo_attach() creates an "instance" of the driver, allocating
   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 airo_attach(struct pcmcia_device *p_dev)
 {
 	dev_link_t *link;
 	local_info_t *local;

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

 	/* Initialize the dev_link_t structure */
 	link = kzalloc(sizeof(struct dev_link_t), GFP_KERNEL);
 	if (!link) {
 		printk(KERN_ERR "airo_cs: no memory for new device\n");
 		return -ENOMEM;
 	}

 	/* Interrupt setup */
 	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 	link->irq.Handler = NULL;

 	/*
 	  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->conf.Attributes = 0;
 	link->conf.Vcc = 50;
 	link->conf.IntType = INT_MEMORY_AND_IO;

 	/* Allocate space for private device-specific data */
 	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 	if (!local) {
 		printk(KERN_ERR "airo_cs: no memory for new device\n");
 		kfree (link);
 		return -ENOMEM;
 	}
 	link->priv = local;

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

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

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

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

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

 	if ( ((local_info_t*)link->priv)->eth_dev ) {
 		stop_airo_card( ((local_info_t*)link->priv)->eth_dev, 0 );
 	}
 	((local_info_t*)link->priv)->eth_dev = NULL;

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

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

   airo_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.

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

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

 static void airo_config(dev_link_t *link)
 {
 	client_handle_t handle;
 	tuple_t tuple;
 	cisparse_t parse;
 	local_info_t *dev;
 	int last_fn, last_ret;
 	u_char buf[64];
 	win_req_t req;
 	memreq_t map;

 	handle = link->handle;
 	dev = link->priv;

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

 	/*
 	  This reads the card's CONFIG tuple to find its configuration
 	  registers.
 	*/
 	tuple.DesiredTuple = CISTPL_CONFIG;
 	tuple.Attributes = 0;
 	tuple.TupleData = buf;
 	tuple.TupleDataMax = sizeof(buf);
 	tuple.TupleOffset = 0;
 	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;

 	/*
 	  In this loop, we scan the CIS for configuration table entries,
 	  each of which describes a valid card configuration, including
 	  voltage, IO window, memory window, and interrupt settings.

 	  We make no assumptions about the card to be configured: we use
 	  just the information available in the CIS.  In an ideal world,
 	  this would work for any PCMCIA card, but it requires a complete
 	  and accurate CIS.  In practice, a driver usually "knows" most of
 	  these things without consulting the CIS, and most client drivers
 	  will only use the CIS to fill in implementation-defined details.
 	*/
 	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 	while (1) {
 		cistpl_cftable_entry_t dflt = { 0 };
 		cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
 		if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
 				pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
 			goto next_entry;

 		if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
 		if (cfg->index == 0) goto next_entry;
 		link->conf.ConfigIndex = cfg->index;

 		/* Does this card need audio output? */
 		if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
 			link->conf.Attributes |= CONF_ENABLE_SPKR;
 			link->conf.Status = CCSR_AUDIO_ENA;
 		}

 		/* Use power settings for Vcc and Vpp if present */
 		/*  Note that the CIS values need to be rescaled */
 		if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM))
 			link->conf.Vcc = cfg->vcc.param[CISTPL_POWER_VNOM]/10000;
 		else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM))
 			link->conf.Vcc = dflt.vcc.param[CISTPL_POWER_VNOM]/10000;

 		if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 			link->conf.Vpp1 = link->conf.Vpp2 =
 				cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 		else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
 			link->conf.Vpp1 = link->conf.Vpp2 =
 				dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;

 		/* Do we need to allocate an interrupt? */
 		if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
 			link->conf.Attributes |= CONF_ENABLE_IRQ;

 		/* IO window settings */
 		link->io.NumPorts1 = link->io.NumPorts2 = 0;
 		if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 			cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 			link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 			if (!(io->flags & CISTPL_IO_8BIT))
 				link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
 			if (!(io->flags & CISTPL_IO_16BIT))
 				link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 			link->io.BasePort1 = io->win[0].base;
 			link->io.NumPorts1 = io->win[0].len;
 			if (io->nwin > 1) {
 				link->io.Attributes2 = link->io.Attributes1;
 				link->io.BasePort2 = io->win[1].base;
 				link->io.NumPorts2 = io->win[1].len;
 			}
 		}

 		/* This reserves IO space but doesn't actually enable it */
 		if (pcmcia_request_io(link->handle, &link->io) != 0)
 			goto next_entry;

 		/*
 		  Now set up a common memory window, if needed.  There is room
 		  in the dev_link_t structure for one memory window handle,
 		  but if the base addresses need to be saved, or if multiple
 		  windows are needed, the info should go in the private data
 		  structure for this device.

 		  Note that the memory window base is a physical address, and
 		  needs to be mapped to virtual space with ioremap() before it
 		  is used.
 		*/
 		if ((cfg->mem.nwin > 0) || (dflt.mem.nwin > 0)) {
 			cistpl_mem_t *mem =
 				(cfg->mem.nwin) ? &cfg->mem : &dflt.mem;
 			req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM;
 			req.Base = mem->win[0].host_addr;
 			req.Size = mem->win[0].len;
 			req.AccessSpeed = 0;
 			if (pcmcia_request_window(&link->handle, &req, &link->win) != 0)
 				goto next_entry;
 			map.Page = 0; map.CardOffset = mem->win[0].card_addr;
 			if (pcmcia_map_mem_page(link->win, &map) != 0)
 				goto next_entry;
 		}
 		/* If we got this far, we're cool! */
 		break;

 	next_entry:
 		CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
 	}

     /*
       Allocate an interrupt line.  Note that this does not assign a
       handler to the interrupt, unless the 'Handler' member of the
       irq structure is initialized.
     */
 	if (link->conf.Attributes & CONF_ENABLE_IRQ)
 		CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));

 	/*
 	  This actually configures the PCMCIA socket -- setting up
 	  the I/O windows and the interrupt mapping, and putting the
 	  card and host interface into "Memory and IO" mode.
 	*/
 	CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
 	((local_info_t*)link->priv)->eth_dev =
 		init_airo_card( link->irq.AssignedIRQ,
 				link->io.BasePort1, 1, &handle_to_dev(handle) );
 	if (!((local_info_t*)link->priv)->eth_dev) goto cs_failed;

 	/*
 	  At this point, the dev_node_t structure(s) need to be
 	  initialized and arranged in a linked list at link->dev.
 	*/
 	strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
 	dev->node.major = dev->node.minor = 0;
 	link->dev = &dev->node;

 	/* Finally, report what we've done */
 	printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
 	       dev->node.dev_name, link->conf.ConfigIndex,
 	       link->conf.Vcc/10, link->conf.Vcc%10);
 	if (link->conf.Vpp1)
 		printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
 	if (link->conf.Attributes & CONF_ENABLE_IRQ)
 		printk(", irq %d", link->irq.AssignedIRQ);
 	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);
 	if (link->win)
 		printk(", mem 0x%06lx-0x%06lx", req.Base,
 		       req.Base+req.Size-1);
 	printk("\n");

 	link->state &= ~DEV_CONFIG_PENDING;
 	return;

  cs_failed:
 	cs_error(link->handle, last_fn, last_ret);
 	airo_release(link);

 } /* airo_config */

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

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

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

 static void airo_release(dev_link_t *link)
 {
 	DEBUG(0, "airo_release(0x%p)\n", link);
 	pcmcia_disable_device(link->handle);
 }

 static int airo_suspend(struct pcmcia_device *p_dev)
 {
 	dev_link_t *link = dev_to_instance(p_dev);
 	local_info_t *local = link->priv;

 	link->state |= DEV_SUSPEND;
 	if (link->state & DEV_CONFIG) {
 		netif_device_detach(local->eth_dev);
 		pcmcia_release_configuration(link->handle);
 	}

 	return 0;
 }

 static int airo_resume(struct pcmcia_device *p_dev)
 {
 	dev_link_t *link = dev_to_instance(p_dev);
 	local_info_t *local = link->priv;

 	link->state &= ~DEV_SUSPEND;
 	if (link->state & DEV_CONFIG) {
 		pcmcia_request_configuration(link->handle, &link->conf);
 		reset_airo_card(local->eth_dev);
 		netif_device_attach(local->eth_dev);
 	}

 	return 0;
 }

 static struct pcmcia_device_id airo_ids[] = {
 	PCMCIA_DEVICE_MANF_CARD(0x015f, 0x000a),
 	PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0005),
 	PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0007),
 	PCMCIA_DEVICE_MANF_CARD(0x0105, 0x0007),
 	PCMCIA_DEVICE_NULL,
 };
 MODULE_DEVICE_TABLE(pcmcia, airo_ids);

 static struct pcmcia_driver airo_driver = {
 	.owner		= THIS_MODULE,
 	.drv		= {
 		.name	= "airo_cs",
 	},
 	.probe		= airo_attach,
 	.remove		= airo_detach,
 	.id_table       = airo_ids,
 	.suspend	= airo_suspend,
 	.resume		= airo_resume,
 };

 static int airo_cs_init(void)
 {
 	return pcmcia_register_driver(&airo_driver);
 }

 static void airo_cs_cleanup(void)
 {
 	pcmcia_unregister_driver(&airo_driver);
 }

 /*
     This program 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.

     In addition:

     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
     are met:

     1. Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.
     2. Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
     3. The name of the author may not be used to endorse or promote
        products derived from this software without specific prior written
        permission.

     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     POSSIBILITY OF SUCH DAMAGE.
 */

 module_init(airo_cs_init);
 module_exit(airo_cs_cleanup);
	/*======================================================================

	Aironet driver for 4500 and 4800 series cards

	This code is released under both the GPL version 2 and BSD licenses.
	Either license may be used. The respective licenses are found at
	the end of this file.

	This code was developed by Benjamin Reed <breed@users.sourceforge.net>
	including portions of which come from the Aironet PC4500
	Developer's Reference Manual and used with permission. Copyright
	(C) 1999 Benjamin Reed. All Rights Reserved. Permission to use
	code in the Developer's manual was granted for this driver by
	Aironet.

	In addition this module was derived from dummy_cs.
	The initial developer of dummy_cs is David A. Hinds
	<dahinds@users.sourceforge.net>. Portions created by David A. Hinds
	are Copyright (C) 1999 David A. Hinds. All Rights Reserved.

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

	#include <linux/config.h>
	#ifdef __IN_PCMCIA_PACKAGE__
	#include <pcmcia/k_compat.h>
	#endif
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/ptrace.h>
	#include <linux/slab.h>
	#include <linux/string.h>
	#include <linux/timer.h>
	#include <linux/netdevice.h>

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

	#include <asm/io.h>
	#include <asm/system.h>

	#include "airo.h"

	/*
	All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
	you do not define PCMCIA_DEBUG at all, all the debug code will be
	left out. If you compile with PCMCIA_DEBUG=0, the debug code will
	be present but disabled -- but it can then be enabled for specific
	modules at load time with a 'pc_debug=#' option to insmod.
	*/
	#ifdef PCMCIA_DEBUG
	static int pc_debug = PCMCIA_DEBUG;
	module_param(pc_debug, int, 0);
	static char *version = "$Revision: 1.2 $";
	#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
	#else
	#define DEBUG(n, args...)
	#endif

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

	MODULE_AUTHOR("Benjamin Reed");
	MODULE_DESCRIPTION("Support for Cisco/Aironet 802.11 wireless ethernet \
	cards. This is the module that links the PCMCIA card \
	with the airo module.");
	MODULE_LICENSE("Dual BSD/GPL");
	MODULE_SUPPORTED_DEVICE("Aironet 4500, 4800 and Cisco 340 PCMCIA cards");

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

	/*
	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 airo_cs
	event handler.
	*/

	static void airo_config(dev_link_t *link);
	static void airo_release(dev_link_t *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 airo_detach(struct pcmcia_device *p_dev);

	/*
	You'll also need to prototype all the functions that will actually
	be used to talk to your device. See 'pcmem_cs' for a good example
	of a fully self-sufficient driver; the other drivers rely more or
	less on other parts of the kernel.
	*/

	/*
	A linked list of "instances" of the aironet device. Each actual
	PCMCIA card corresponds to one device instance, and is described
	by one dev_link_t structure (defined in ds.h).

	You may not want to use a linked list for this -- for example, the
	memory card driver uses an array of dev_link_t pointers, where minor
	device numbers are used to derive the corresponding array index.
	*/

	/*
	A driver needs to provide a dev_node_t structure for each device
	on a card. In some cases, there is only one device per card (for
	example, ethernet cards, modems). In other cases, there may be
	many actual or logical devices (SCSI adapters, memory cards with
	multiple partitions). The dev_node_t structures need to be kept
	in a linked list starting at the 'dev' field of a dev_link_t
	structure. We allocate them in the card's private data structure,
	because they generally shouldn't be allocated dynamically.

	In this case, we also provide a flag to indicate if a device is
	"stopped" due to a power management event, or card ejection. The
	device IO routines can use a flag like this to throttle IO to a
	card that is not ready to accept it.
	*/

	typedef struct local_info_t {
	dev_node_t node;
	struct net_device *eth_dev;
	} local_info_t;

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

	airo_attach() creates an "instance" of the driver, allocating
	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 airo_attach(struct pcmcia_device *p_dev)
	{
	dev_link_t *link;
	local_info_t *local;

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

	/* Initialize the dev_link_t structure */
	link = kzalloc(sizeof(struct dev_link_t), GFP_KERNEL);
	if (!link) {
	printk(KERN_ERR "airo_cs: no memory for new device\n");
	return -ENOMEM;
	}

	/* Interrupt setup */
	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
	link->irq.Handler = NULL;

	/*
	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->conf.Attributes = 0;
	link->conf.Vcc = 50;
	link->conf.IntType = INT_MEMORY_AND_IO;

	/* Allocate space for private device-specific data */
	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
	if (!local) {
	printk(KERN_ERR "airo_cs: no memory for new device\n");
	kfree (link);
	return -ENOMEM;
	}
	link->priv = local;

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

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

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

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

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

	if ( ((local_info_t*)link->priv)->eth_dev ) {
	stop_airo_card( ((local_info_t*)link->priv)->eth_dev, 0 );
	}
	((local_info_t*)link->priv)->eth_dev = NULL;

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

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

	airo_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.

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

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

	static void airo_config(dev_link_t *link)
	{
	client_handle_t handle;
	tuple_t tuple;
	cisparse_t parse;
	local_info_t *dev;
	int last_fn, last_ret;
	u_char buf[64];
	win_req_t req;
	memreq_t map;

	handle = link->handle;
	dev = link->priv;

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

	/*
	This reads the card's CONFIG tuple to find its configuration
	registers.
	*/
	tuple.DesiredTuple = CISTPL_CONFIG;
	tuple.Attributes = 0;
	tuple.TupleData = buf;
	tuple.TupleDataMax = sizeof(buf);
	tuple.TupleOffset = 0;
	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;

	/*
	In this loop, we scan the CIS for configuration table entries,
	each of which describes a valid card configuration, including
	voltage, IO window, memory window, and interrupt settings.

	We make no assumptions about the card to be configured: we use
	just the information available in the CIS. In an ideal world,
	this would work for any PCMCIA card, but it requires a complete
	and accurate CIS. In practice, a driver usually "knows" most of
	these things without consulting the CIS, and most client drivers
	will only use the CIS to fill in implementation-defined details.
	*/
	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
	while (1) {
	cistpl_cftable_entry_t dflt = { 0 };
	cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
	if (pcmcia_get_tuple_data(handle, &tuple) != 0 \|\|
	pcmcia_parse_tuple(handle, &tuple, &parse) != 0)
	goto next_entry;

	if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
	if (cfg->index == 0) goto next_entry;
	link->conf.ConfigIndex = cfg->index;

	/* Does this card need audio output? */
	if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
	link->conf.Attributes \|= CONF_ENABLE_SPKR;
	link->conf.Status = CCSR_AUDIO_ENA;
	}

	/* Use power settings for Vcc and Vpp if present */
	/* Note that the CIS values need to be rescaled */
	if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM))
	link->conf.Vcc = cfg->vcc.param[CISTPL_POWER_VNOM]/10000;
	else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM))
	link->conf.Vcc = dflt.vcc.param[CISTPL_POWER_VNOM]/10000;

	if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
	link->conf.Vpp1 = link->conf.Vpp2 =
	cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
	else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
	link->conf.Vpp1 = link->conf.Vpp2 =
	dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;

	/* Do we need to allocate an interrupt? */
	if (cfg->irq.IRQInfo1 \|\| dflt.irq.IRQInfo1)
	link->conf.Attributes \|= CONF_ENABLE_IRQ;

	/* IO window settings */
	link->io.NumPorts1 = link->io.NumPorts2 = 0;
	if ((cfg->io.nwin > 0) \|\| (dflt.io.nwin > 0)) {
	cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
	if (!(io->flags & CISTPL_IO_8BIT))
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
	if (!(io->flags & CISTPL_IO_16BIT))
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
	link->io.BasePort1 = io->win[0].base;
	link->io.NumPorts1 = io->win[0].len;
	if (io->nwin > 1) {
	link->io.Attributes2 = link->io.Attributes1;
	link->io.BasePort2 = io->win[1].base;
	link->io.NumPorts2 = io->win[1].len;
	}
	}

	/* This reserves IO space but doesn't actually enable it */
	if (pcmcia_request_io(link->handle, &link->io) != 0)
	goto next_entry;

	/*
	Now set up a common memory window, if needed. There is room
	in the dev_link_t structure for one memory window handle,
	but if the base addresses need to be saved, or if multiple
	windows are needed, the info should go in the private data
	structure for this device.

	Note that the memory window base is a physical address, and
	needs to be mapped to virtual space with ioremap() before it
	is used.
	*/
	if ((cfg->mem.nwin > 0) \|\| (dflt.mem.nwin > 0)) {
	cistpl_mem_t *mem =
	(cfg->mem.nwin) ? &cfg->mem : &dflt.mem;
	req.Attributes = WIN_DATA_WIDTH_16\|WIN_MEMORY_TYPE_CM;
	req.Base = mem->win[0].host_addr;
	req.Size = mem->win[0].len;
	req.AccessSpeed = 0;
	if (pcmcia_request_window(&link->handle, &req, &link->win) != 0)
	goto next_entry;
	map.Page = 0; map.CardOffset = mem->win[0].card_addr;
	if (pcmcia_map_mem_page(link->win, &map) != 0)
	goto next_entry;
	}
	/* If we got this far, we're cool! */
	break;

	next_entry:
	CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple));
	}

	/*
	Allocate an interrupt line. Note that this does not assign a
	handler to the interrupt, unless the 'Handler' member of the
	irq structure is initialized.
	*/
	if (link->conf.Attributes & CONF_ENABLE_IRQ)
	CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));

	/*
	This actually configures the PCMCIA socket -- setting up
	the I/O windows and the interrupt mapping, and putting the
	card and host interface into "Memory and IO" mode.
	*/
	CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
	((local_info_t*)link->priv)->eth_dev =
	init_airo_card( link->irq.AssignedIRQ,
	link->io.BasePort1, 1, &handle_to_dev(handle) );
	if (!((local_info_t*)link->priv)->eth_dev) goto cs_failed;

	/*
	At this point, the dev_node_t structure(s) need to be
	initialized and arranged in a linked list at link->dev.
	*/
	strcpy(dev->node.dev_name, ((local_info_t*)link->priv)->eth_dev->name );
	dev->node.major = dev->node.minor = 0;
	link->dev = &dev->node;

	/* Finally, report what we've done */
	printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
	dev->node.dev_name, link->conf.ConfigIndex,
	link->conf.Vcc/10, link->conf.Vcc%10);
	if (link->conf.Vpp1)
	printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
	if (link->conf.Attributes & CONF_ENABLE_IRQ)
	printk(", irq %d", link->irq.AssignedIRQ);
	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);
	if (link->win)
	printk(", mem 0x%06lx-0x%06lx", req.Base,
	req.Base+req.Size-1);
	printk("\n");

	link->state &= ~DEV_CONFIG_PENDING;
	return;

	cs_failed:
	cs_error(link->handle, last_fn, last_ret);
	airo_release(link);

	} /* airo_config */

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

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

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

	static void airo_release(dev_link_t *link)
	{
	DEBUG(0, "airo_release(0x%p)\n", link);
	pcmcia_disable_device(link->handle);
	}

	static int airo_suspend(struct pcmcia_device *p_dev)
	{
	dev_link_t *link = dev_to_instance(p_dev);
	local_info_t *local = link->priv;

	link->state \|= DEV_SUSPEND;
	if (link->state & DEV_CONFIG) {
	netif_device_detach(local->eth_dev);
	pcmcia_release_configuration(link->handle);
	}

	return 0;
	}

	static int airo_resume(struct pcmcia_device *p_dev)
	{
	dev_link_t *link = dev_to_instance(p_dev);
	local_info_t *local = link->priv;

	link->state &= ~DEV_SUSPEND;
	if (link->state & DEV_CONFIG) {
	pcmcia_request_configuration(link->handle, &link->conf);
	reset_airo_card(local->eth_dev);
	netif_device_attach(local->eth_dev);
	}

	return 0;
	}

	static struct pcmcia_device_id airo_ids[] = {
	PCMCIA_DEVICE_MANF_CARD(0x015f, 0x000a),
	PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0005),
	PCMCIA_DEVICE_MANF_CARD(0x015f, 0x0007),
	PCMCIA_DEVICE_MANF_CARD(0x0105, 0x0007),
	PCMCIA_DEVICE_NULL,
	};
	MODULE_DEVICE_TABLE(pcmcia, airo_ids);

	static struct pcmcia_driver airo_driver = {
	.owner = THIS_MODULE,
	.drv = {
	.name = "airo_cs",
	},
	.probe = airo_attach,
	.remove = airo_detach,
	.id_table = airo_ids,
	.suspend = airo_suspend,
	.resume = airo_resume,
	};

	static int airo_cs_init(void)
	{
	return pcmcia_register_driver(&airo_driver);
	}

	static void airo_cs_cleanup(void)
	{
	pcmcia_unregister_driver(&airo_driver);
	}

	/*
	This program 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.

	In addition:

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:

	1. Redistributions of source code must retain the above copyright
	notice, this list of conditions and the following disclaimer.
	2. Redistributions in binary form must reproduce the above copyright
	notice, this list of conditions and the following disclaimer in the
	documentation and/or other materials provided with the distribution.
	3. The name of the author may not be used to endorse or promote
	products derived from this software without specific prior written
	permission.

	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
	INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
	*/

	module_init(airo_cs_init);
	module_exit(airo_cs_cleanup);