Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1917 insertions, 0 deletions

diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
new file mode 100644
index 000000000000..03fc885db1c5
--- /dev/null
+++ b/drivers/pcmcia/cs.c
@@ -0,0 +1,1917 @@
+/*
+ * cs.c -- Kernel Card Services - core services
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * (C) 1999		David A. Hinds
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+
+#define IN_CARD_SERVICES
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/ss.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/bulkmem.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+#include "cs_internal.h"
+
+#ifdef CONFIG_PCI
+#define PCI_OPT " [pci]"
+#else
+#define PCI_OPT ""
+#endif
+#ifdef CONFIG_CARDBUS
+#define CB_OPT " [cardbus]"
+#else
+#define CB_OPT ""
+#endif
+#ifdef CONFIG_PM
+#define PM_OPT " [pm]"
+#else
+#define PM_OPT ""
+#endif
+#if !defined(CONFIG_CARDBUS) && !defined(CONFIG_PCI) && !defined(CONFIG_PM)
+#define OPTIONS " none"
+#else
+#define OPTIONS PCI_OPT CB_OPT PM_OPT
+#endif
+
+static const char *release = "Linux Kernel Card Services";
+static const char *options = "options: " OPTIONS;
+
+/*====================================================================*/
+
+/* Module parameters */
+
+MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
+MODULE_DESCRIPTION("Linux Kernel Card Services\noptions:" OPTIONS);
+MODULE_LICENSE("GPL");
+
+#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
+
+INT_MODULE_PARM(setup_delay,	10);		/* centiseconds */
+INT_MODULE_PARM(resume_delay,	20);		/* centiseconds */
+INT_MODULE_PARM(shutdown_delay,	3);		/* centiseconds */
+INT_MODULE_PARM(vcc_settle,	40);		/* centiseconds */
+INT_MODULE_PARM(reset_time,	10);		/* usecs */
+INT_MODULE_PARM(unreset_delay,	10);		/* centiseconds */
+INT_MODULE_PARM(unreset_check,	10);		/* centiseconds */
+INT_MODULE_PARM(unreset_limit,	30);		/* unreset_check's */
+
+/* Access speed for attribute memory windows */
+INT_MODULE_PARM(cis_speed,	300);		/* ns */
+
+/* Access speed for IO windows */
+INT_MODULE_PARM(io_speed,	0);		/* ns */
+
+#ifdef DEBUG
+static int pc_debug;
+
+module_param(pc_debug, int, 0644);
+
+int cs_debug_level(int level)
+{
+	return pc_debug > level;
+}
+#endif
+
+/*====================================================================*/
+
+socket_state_t dead_socket = {
+	.csc_mask	= SS_DETECT,
+};
+
+
+/* List of all sockets, protected by a rwsem */
+LIST_HEAD(pcmcia_socket_list);
+DECLARE_RWSEM(pcmcia_socket_list_rwsem);
+EXPORT_SYMBOL(pcmcia_socket_list);
+EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
+
+
+#ifdef CONFIG_PCMCIA_PROBE
+/* mask ofIRQs already reserved by other cards, we should avoid using them */
+static u8 pcmcia_used_irq[NR_IRQS];
+#endif
+
+/*====================================================================
+
+    Low-level PC Card interface drivers need to register with Card
+    Services using these calls.
+    
+======================================================================*/
+
+/**
+ * socket drivers are expected to use the following callbacks in their 
+ * .drv struct:
+ *  - pcmcia_socket_dev_suspend
+ *  - pcmcia_socket_dev_resume
+ * These functions check for the appropriate struct pcmcia_soket arrays,
+ * and pass them to the low-level functions pcmcia_{suspend,resume}_socket
+ */
+static int socket_resume(struct pcmcia_socket *skt);
+static int socket_suspend(struct pcmcia_socket *skt);
+
+int pcmcia_socket_dev_suspend(struct device *dev, pm_message_t state)
+{
+	struct pcmcia_socket *socket;
+
+	down_read(&pcmcia_socket_list_rwsem);
+	list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
+		if (socket->dev.dev != dev)
+			continue;
+		down(&socket->skt_sem);
+		socket_suspend(socket);
+		up(&socket->skt_sem);
+	}
+	up_read(&pcmcia_socket_list_rwsem);
+
+	return 0;
+}
+EXPORT_SYMBOL(pcmcia_socket_dev_suspend);
+
+int pcmcia_socket_dev_resume(struct device *dev)
+{
+	struct pcmcia_socket *socket;
+
+	down_read(&pcmcia_socket_list_rwsem);
+	list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
+		if (socket->dev.dev != dev)
+			continue;
+		down(&socket->skt_sem);
+		socket_resume(socket);
+		up(&socket->skt_sem);
+	}
+	up_read(&pcmcia_socket_list_rwsem);
+
+	return 0;
+}
+EXPORT_SYMBOL(pcmcia_socket_dev_resume);
+
+
+struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt)
+{
+	struct class_device *cl_dev = class_device_get(&skt->dev);
+	if (!cl_dev)
+		return NULL;
+	skt = class_get_devdata(cl_dev);
+	if (!try_module_get(skt->owner)) {
+		class_device_put(&skt->dev);
+		return NULL;
+	}
+	return (skt);
+}
+EXPORT_SYMBOL(pcmcia_get_socket);
+
+
+void pcmcia_put_socket(struct pcmcia_socket *skt)
+{
+	module_put(skt->owner);
+	class_device_put(&skt->dev);
+}
+EXPORT_SYMBOL(pcmcia_put_socket);
+
+
+static void pcmcia_release_socket(struct class_device *class_dev)
+{
+	struct pcmcia_socket *socket = class_get_devdata(class_dev);
+
+	complete(&socket->socket_released);
+}
+
+static int pccardd(void *__skt);
+
+/**
+ * pcmcia_register_socket - add a new pcmcia socket device
+ */
+int pcmcia_register_socket(struct pcmcia_socket *socket)
+{
+	int ret;
+
+	if (!socket || !socket->ops || !socket->dev.dev || !socket->resource_ops)
+		return -EINVAL;
+
+	cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops);
+
+	spin_lock_init(&socket->lock);
+
+	if (socket->resource_ops->init) {
+		ret = socket->resource_ops->init(socket);
+		if (ret)
+			return (ret);
+	}
+
+	/* try to obtain a socket number [yes, it gets ugly if we
+	 * register more than 2^sizeof(unsigned int) pcmcia 
+	 * sockets... but the socket number is deprecated 
+	 * anyways, so I don't care] */
+	down_write(&pcmcia_socket_list_rwsem);
+	if (list_empty(&pcmcia_socket_list))
+		socket->sock = 0;
+	else {
+		unsigned int found, i = 1;
+		struct pcmcia_socket *tmp;
+		do {
+			found = 1;
+			list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
+				if (tmp->sock == i)
+					found = 0;
+			}
+			i++;
+		} while (!found);
+		socket->sock = i - 1;
+	}
+	list_add_tail(&socket->socket_list, &pcmcia_socket_list);
+	up_write(&pcmcia_socket_list_rwsem);
+
+
+	/* set proper values in socket->dev */
+	socket->dev.class_data = socket;
+	socket->dev.class = &pcmcia_socket_class;
+	snprintf(socket->dev.class_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock);
+
+	/* base address = 0, map = 0 */
+	socket->cis_mem.flags = 0;
+	socket->cis_mem.speed = cis_speed;
+
+	INIT_LIST_HEAD(&socket->cis_cache);
+
+	init_completion(&socket->socket_released);
+	init_completion(&socket->thread_done);
+	init_waitqueue_head(&socket->thread_wait);
+	init_MUTEX(&socket->skt_sem);
+	spin_lock_init(&socket->thread_lock);
+
+	ret = kernel_thread(pccardd, socket, CLONE_KERNEL);
+	if (ret < 0)
+		goto err;
+
+	wait_for_completion(&socket->thread_done);
+	if(!socket->thread) {
+		printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket);
+		return -EIO;
+	}
+	pcmcia_parse_events(socket, SS_DETECT);
+
+	return 0;
+
+ err:
+	down_write(&pcmcia_socket_list_rwsem);
+	list_del(&socket->socket_list);
+	up_write(&pcmcia_socket_list_rwsem);
+	return ret;
+} /* pcmcia_register_socket */
+EXPORT_SYMBOL(pcmcia_register_socket);
+
+
+/**
+ * pcmcia_unregister_socket - remove a pcmcia socket device
+ */
+void pcmcia_unregister_socket(struct pcmcia_socket *socket)
+{
+	if (!socket)
+		return;
+
+	cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
+
+	if (socket->thread) {
+		init_completion(&socket->thread_done);
+		socket->thread = NULL;
+		wake_up(&socket->thread_wait);
+		wait_for_completion(&socket->thread_done);
+	}
+	release_cis_mem(socket);
+
+	/* remove from our own list */
+	down_write(&pcmcia_socket_list_rwsem);
+	list_del(&socket->socket_list);
+	up_write(&pcmcia_socket_list_rwsem);
+
+	/* wait for sysfs to drop all references */
+	release_resource_db(socket);
+	wait_for_completion(&socket->socket_released);
+} /* pcmcia_unregister_socket */
+EXPORT_SYMBOL(pcmcia_unregister_socket);
+
+
+struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr)
+{
+	struct pcmcia_socket *s;
+
+	down_read(&pcmcia_socket_list_rwsem);
+	list_for_each_entry(s, &pcmcia_socket_list, socket_list)
+		if (s->sock == nr) {
+			up_read(&pcmcia_socket_list_rwsem);
+			return s;
+		}
+	up_read(&pcmcia_socket_list_rwsem);
+
+	return NULL;
+
+}
+EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
+
+
+/*======================================================================
+
+    socket_setup() and shutdown_socket() are called by the main event
+    handler when card insertion and removal events are received.
+    socket_setup() turns on socket power and resets the socket, in two stages.
+    shutdown_socket() unconfigures a socket and turns off socket power.
+
+======================================================================*/
+
+static void shutdown_socket(struct pcmcia_socket *s)
+{
+    cs_dbg(s, 1, "shutdown_socket\n");
+
+    /* Blank out the socket state */
+    s->socket = dead_socket;
+    s->ops->init(s);
+    s->ops->set_socket(s, &s->socket);
+    s->irq.AssignedIRQ = s->irq.Config = 0;
+    s->lock_count = 0;
+    destroy_cis_cache(s);
+#ifdef CONFIG_CARDBUS
+    cb_free(s);
+#endif
+    s->functions = 0;
+    if (s->config) {
+	kfree(s->config);
+	s->config = NULL;
+    }
+
+    {
+	int status;
+	s->ops->get_status(s, &status);
+	if (status & SS_POWERON) {
+		printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s);
+	}
+    }
+} /* shutdown_socket */
+
+/*======================================================================
+
+    The central event handler.  Send_event() sends an event to the
+    16-bit subsystem, which then calls the relevant device drivers.
+    Parse_events() interprets the event bits from
+    a card status change report.  Do_shutdown() handles the high
+    priority stuff associated with a card removal.
+    
+======================================================================*/
+
+
+/* NOTE: send_event needs to be called with skt->sem held. */
+
+static int send_event(struct pcmcia_socket *s, event_t event, int priority)
+{
+	int ret;
+
+	if (s->state & SOCKET_CARDBUS)
+		return 0;
+
+	cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n",
+	   event, priority, s->callback);
+
+	if (!s->callback)
+		return 0;
+	if (!try_module_get(s->callback->owner))
+		return 0;
+
+	ret = s->callback->event(s, event, priority);
+
+	module_put(s->callback->owner);
+
+	return ret;
+}
+
+static void socket_remove_drivers(struct pcmcia_socket *skt)
+{
+	cs_dbg(skt, 4, "remove_drivers\n");
+
+	send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
+}
+
+static void socket_shutdown(struct pcmcia_socket *skt)
+{
+	cs_dbg(skt, 4, "shutdown\n");
+
+	socket_remove_drivers(skt);
+	skt->state &= SOCKET_INUSE|SOCKET_PRESENT;
+	msleep(shutdown_delay * 10);
+	skt->state &= SOCKET_INUSE;
+	shutdown_socket(skt);
+}
+
+static int socket_reset(struct pcmcia_socket *skt)
+{
+	int status, i;
+
+	cs_dbg(skt, 4, "reset\n");
+
+	skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
+	skt->ops->set_socket(skt, &skt->socket);
+	udelay((long)reset_time);
+
+	skt->socket.flags &= ~SS_RESET;
+	skt->ops->set_socket(skt, &skt->socket);
+
+	msleep(unreset_delay * 10);
+	for (i = 0; i < unreset_limit; i++) {
+		skt->ops->get_status(skt, &status);
+
+		if (!(status & SS_DETECT))
+			return CS_NO_CARD;
+
+		if (status & SS_READY)
+			return CS_SUCCESS;
+
+		msleep(unreset_check * 10);
+	}
+
+	cs_err(skt, "time out after reset.\n");
+	return CS_GENERAL_FAILURE;
+}
+
+static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
+{
+	int status, i;
+
+	cs_dbg(skt, 4, "setup\n");
+
+	skt->ops->get_status(skt, &status);
+	if (!(status & SS_DETECT))
+		return CS_NO_CARD;
+
+	msleep(initial_delay * 10);
+
+	for (i = 0; i < 100; i++) {
+		skt->ops->get_status(skt, &status);
+		if (!(status & SS_DETECT))
+			return CS_NO_CARD;
+
+		if (!(status & SS_PENDING))
+			break;
+
+		msleep(100);
+	}
+
+	if (status & SS_PENDING) {
+		cs_err(skt, "voltage interrogation timed out.\n");
+		return CS_GENERAL_FAILURE;
+	}
+
+	if (status & SS_CARDBUS) {
+		skt->state |= SOCKET_CARDBUS;
+#ifndef CONFIG_CARDBUS
+		cs_err(skt, "cardbus cards are not supported.\n");
+		return CS_BAD_TYPE;
+#endif
+	}
+
+	/*
+	 * Decode the card voltage requirements, and apply power to the card.
+	 */
+	if (status & SS_3VCARD)
+		skt->socket.Vcc = skt->socket.Vpp = 33;
+	else if (!(status & SS_XVCARD))
+		skt->socket.Vcc = skt->socket.Vpp = 50;
+	else {
+		cs_err(skt, "unsupported voltage key.\n");
+		return CS_BAD_TYPE;
+	}
+	skt->socket.flags = 0;
+	skt->ops->set_socket(skt, &skt->socket);
+
+	/*
+	 * Wait "vcc_settle" for the supply to stabilise.
+	 */
+	msleep(vcc_settle * 10);
+
+	skt->ops->get_status(skt, &status);
+	if (!(status & SS_POWERON)) {
+		cs_err(skt, "unable to apply power.\n");
+		return CS_BAD_TYPE;
+	}
+
+	return socket_reset(skt);
+}
+
+/*
+ * Handle card insertion.  Setup the socket, reset the card,
+ * and then tell the rest of PCMCIA that a card is present.
+ */
+static int socket_insert(struct pcmcia_socket *skt)
+{
+	int ret;
+
+	cs_dbg(skt, 4, "insert\n");
+
+	if (!cs_socket_get(skt))
+		return CS_NO_CARD;
+
+	ret = socket_setup(skt, setup_delay);
+	if (ret == CS_SUCCESS) {
+		skt->state |= SOCKET_PRESENT;
+#ifdef CONFIG_CARDBUS
+		if (skt->state & SOCKET_CARDBUS) {
+			cb_alloc(skt);
+			skt->state |= SOCKET_CARDBUS_CONFIG;
+		}
+#endif
+		cs_dbg(skt, 4, "insert done\n");
+
+		send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
+	} else {
+		socket_shutdown(skt);
+		cs_socket_put(skt);
+	}
+
+	return ret;
+}
+
+static int socket_suspend(struct pcmcia_socket *skt)
+{
+	if (skt->state & SOCKET_SUSPEND)
+		return CS_IN_USE;
+
+	send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
+	skt->socket = dead_socket;
+	skt->ops->set_socket(skt, &skt->socket);
+	if (skt->ops->suspend)
+		skt->ops->suspend(skt);
+	skt->state |= SOCKET_SUSPEND;
+
+	return CS_SUCCESS;
+}
+
+/*
+ * Resume a socket.  If a card is present, verify its CIS against
+ * our cached copy.  If they are different, the card has been
+ * replaced, and we need to tell the drivers.
+ */
+static int socket_resume(struct pcmcia_socket *skt)
+{
+	int ret;
+
+	if (!(skt->state & SOCKET_SUSPEND))
+		return CS_IN_USE;
+
+	skt->socket = dead_socket;
+	skt->ops->init(skt);
+	skt->ops->set_socket(skt, &skt->socket);
+
+	if (!(skt->state & SOCKET_PRESENT)) {
+		skt->state &= ~SOCKET_SUSPEND;
+		return socket_insert(skt);
+	}
+
+	ret = socket_setup(skt, resume_delay);
+	if (ret == CS_SUCCESS) {
+		/*
+		 * FIXME: need a better check here for cardbus cards.
+		 */
+		if (verify_cis_cache(skt) != 0) {
+			cs_dbg(skt, 4, "cis mismatch - different card\n");
+			socket_remove_drivers(skt);
+			destroy_cis_cache(skt);
+			/*
+			 * Workaround: give DS time to schedule removal.
+			 * Remove me once the 100ms delay is eliminated
+			 * in ds.c
+			 */
+			msleep(200);
+			send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
+		} else {
+			cs_dbg(skt, 4, "cis matches cache\n");
+			send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
+		}
+	} else {
+		socket_shutdown(skt);
+		cs_socket_put(skt);
+	}
+
+	skt->state &= ~SOCKET_SUSPEND;
+
+	return CS_SUCCESS;
+}
+
+static void socket_remove(struct pcmcia_socket *skt)
+{
+	socket_shutdown(skt);
+	cs_socket_put(skt);
+}
+
+/*
+ * Process a socket card detect status change.
+ *
+ * If we don't have a card already present, delay the detect event for
+ * about 20ms (to be on the safe side) before reading the socket status.
+ *
+ * Some i82365-based systems send multiple SS_DETECT events during card
+ * insertion, and the "card present" status bit seems to bounce.  This
+ * will probably be true with GPIO-based card detection systems after
+ * the product has aged.
+ */
+static void socket_detect_change(struct pcmcia_socket *skt)
+{
+	if (!(skt->state & SOCKET_SUSPEND)) {
+		int status;
+
+		if (!(skt->state & SOCKET_PRESENT))
+			msleep(20);
+
+		skt->ops->get_status(skt, &status);
+		if ((skt->state & SOCKET_PRESENT) &&
+		     !(status & SS_DETECT))
+			socket_remove(skt);
+		if (!(skt->state & SOCKET_PRESENT) &&
+		    (status & SS_DETECT))
+			socket_insert(skt);
+	}
+}
+
+static int pccardd(void *__skt)
+{
+	struct pcmcia_socket *skt = __skt;
+	DECLARE_WAITQUEUE(wait, current);
+	int ret;
+
+	daemonize("pccardd");
+
+	skt->thread = current;
+	skt->socket = dead_socket;
+	skt->ops->init(skt);
+	skt->ops->set_socket(skt, &skt->socket);
+
+	/* register with the device core */
+	ret = class_device_register(&skt->dev);
+	if (ret) {
+		printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n",
+			skt);
+		skt->thread = NULL;
+		complete_and_exit(&skt->thread_done, 0);
+	}
+	complete(&skt->thread_done);
+
+	add_wait_queue(&skt->thread_wait, &wait);
+	for (;;) {
+		unsigned long flags;
+		unsigned int events;
+
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		spin_lock_irqsave(&skt->thread_lock, flags);
+		events = skt->thread_events;
+		skt->thread_events = 0;
+		spin_unlock_irqrestore(&skt->thread_lock, flags);
+
+		if (events) {
+			down(&skt->skt_sem);
+			if (events & SS_DETECT)
+				socket_detect_change(skt);
+			if (events & SS_BATDEAD)
+				send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
+			if (events & SS_BATWARN)
+				send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
+			if (events & SS_READY)
+				send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
+			up(&skt->skt_sem);
+			continue;
+		}
+
+		schedule();
+		try_to_freeze(PF_FREEZE);
+
+		if (!skt->thread)
+			break;
+	}
+	remove_wait_queue(&skt->thread_wait, &wait);
+
+	/* remove from the device core */
+	class_device_unregister(&skt->dev);
+
+	complete_and_exit(&skt->thread_done, 0);
+}
+
+/*
+ * Yenta (at least) probes interrupts before registering the socket and
+ * starting the handler thread.
+ */
+void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
+{
+	cs_dbg(s, 4, "parse_events: events %08x\n", events);
+	if (s->thread) {
+		spin_lock(&s->thread_lock);
+		s->thread_events |= events;
+		spin_unlock(&s->thread_lock);
+
+		wake_up(&s->thread_wait);
+	}
+} /* pcmcia_parse_events */
+
+
+/*======================================================================
+
+    Special stuff for managing IO windows, because they are scarce.
+    
+======================================================================*/
+
+static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
+			  ioaddr_t num, u_int lines)
+{
+    int i;
+    kio_addr_t try, align;
+
+    align = (*base) ? (lines ? 1<<lines : 0) : 1;
+    if (align && (align < num)) {
+	if (*base) {
+	    cs_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
+		   num, align);
+	    align = 0;
+	} else
+	    while (align && (align < num)) align <<= 1;
+    }
+    if (*base & ~(align-1)) {
+	cs_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
+	       *base, align);
+	align = 0;
+    }
+    if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
+	*base = s->io_offset | (*base & 0x0fff);
+	return 0;
+    }
+    /* Check for an already-allocated window that must conflict with
+       what was asked for.  It is a hack because it does not catch all
+       potential conflicts, just the most obvious ones. */
+    for (i = 0; i < MAX_IO_WIN; i++)
+	if ((s->io[i].NumPorts != 0) &&
+	    ((s->io[i].BasePort & (align-1)) == *base))
+	    return 1;
+    for (i = 0; i < MAX_IO_WIN; i++) {
+	if (s->io[i].NumPorts == 0) {
+	    s->io[i].res = find_io_region(*base, num, align, s);
+	    if (s->io[i].res) {
+		s->io[i].Attributes = attr;
+		s->io[i].BasePort = *base = s->io[i].res->start;
+		s->io[i].NumPorts = s->io[i].InUse = num;
+		break;
+	    } else
+		return 1;
+	} else if (s->io[i].Attributes != attr)
+	    continue;
+	/* Try to extend top of window */
+	try = s->io[i].BasePort + s->io[i].NumPorts;
+	if ((*base == 0) || (*base == try))
+	    if (adjust_io_region(s->io[i].res, s->io[i].res->start,
+				 s->io[i].res->end + num, s) == 0) {
+		*base = try;
+		s->io[i].NumPorts += num;
+		s->io[i].InUse += num;
+		break;
+	    }
+	/* Try to extend bottom of window */
+	try = s->io[i].BasePort - num;
+	if ((*base == 0) || (*base == try))
+	    if (adjust_io_region(s->io[i].res, s->io[i].res->start - num,
+				 s->io[i].res->end, s) == 0) {
+		s->io[i].BasePort = *base = try;
+		s->io[i].NumPorts += num;
+		s->io[i].InUse += num;
+		break;
+	    }
+    }
+    return (i == MAX_IO_WIN);
+} /* alloc_io_space */
+
+static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
+			     ioaddr_t num)
+{
+    int i;
+
+    for (i = 0; i < MAX_IO_WIN; i++) {
+	if ((s->io[i].BasePort <= base) &&
+	    (s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
+	    s->io[i].InUse -= num;
+	    /* Free the window if no one else is using it */
+	    if (s->io[i].InUse == 0) {
+		s->io[i].NumPorts = 0;
+		release_resource(s->io[i].res);
+		kfree(s->io[i].res);
+		s->io[i].res = NULL;
+	    }
+	}
+    }
+}
+
+/*======================================================================
+
+    Access_configuration_register() reads and writes configuration
+    registers in attribute memory.  Memory window 0 is reserved for
+    this and the tuple reading services.
+    
+======================================================================*/
+
+int pccard_access_configuration_register(struct pcmcia_socket *s,
+					 unsigned int function,
+					 conf_reg_t *reg)
+{
+    config_t *c;
+    int addr;
+    u_char val;
+
+    if (!s || !s->config)
+	return CS_NO_CARD;    
+
+    c = &s->config[function];
+
+    if (c == NULL)
+	return CS_NO_CARD;
+
+    if (!(c->state & CONFIG_LOCKED))
+	return CS_CONFIGURATION_LOCKED;
+
+    addr = (c->ConfigBase + reg->Offset) >> 1;
+    
+    switch (reg->Action) {
+    case CS_READ:
+	read_cis_mem(s, 1, addr, 1, &val);
+	reg->Value = val;
+	break;
+    case CS_WRITE:
+	val = reg->Value;
+	write_cis_mem(s, 1, addr, 1, &val);
+	break;
+    default:
+	return CS_BAD_ARGS;
+	break;
+    }
+    return CS_SUCCESS;
+} /* access_configuration_register */
+EXPORT_SYMBOL(pccard_access_configuration_register);
+
+
+/*====================================================================*/
+
+int pccard_get_configuration_info(struct pcmcia_socket *s,
+				  unsigned int function,
+				  config_info_t *config)
+{
+    config_t *c;
+    
+    if (!(s->state & SOCKET_PRESENT))
+	return CS_NO_CARD;
+
+    config->Function = function;
+
+#ifdef CONFIG_CARDBUS
+    if (s->state & SOCKET_CARDBUS) {
+	memset(config, 0, sizeof(config_info_t));
+	config->Vcc = s->socket.Vcc;
+	config->Vpp1 = config->Vpp2 = s->socket.Vpp;
+	config->Option = s->cb_dev->subordinate->number;
+	if (s->state & SOCKET_CARDBUS_CONFIG) {
+	    config->Attributes = CONF_VALID_CLIENT;
+	    config->IntType = INT_CARDBUS;
+	    config->AssignedIRQ = s->irq.AssignedIRQ;
+	    if (config->AssignedIRQ)
+		config->Attributes |= CONF_ENABLE_IRQ;
+	    config->BasePort1 = s->io[0].BasePort;
+	    config->NumPorts1 = s->io[0].NumPorts;
+	}
+	return CS_SUCCESS;
+    }
+#endif
+    
+    c = (s->config != NULL) ? &s->config[function] : NULL;
+    
+    if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
+	config->Attributes = 0;
+	config->Vcc = s->socket.Vcc;
+	config->Vpp1 = config->Vpp2 = s->socket.Vpp;
+	return CS_SUCCESS;
+    }
+    
+    /* !!! This is a hack !!! */
+    memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
+    config->Attributes |= CONF_VALID_CLIENT;
+    config->CardValues = c->CardValues;
+    config->IRQAttributes = c->irq.Attributes;
+    config->AssignedIRQ = s->irq.AssignedIRQ;
+    config->BasePort1 = c->io.BasePort1;
+    config->NumPorts1 = c->io.NumPorts1;
+    config->Attributes1 = c->io.Attributes1;
+    config->BasePort2 = c->io.BasePort2;
+    config->NumPorts2 = c->io.NumPorts2;
+    config->Attributes2 = c->io.Attributes2;
+    config->IOAddrLines = c->io.IOAddrLines;
+    
+    return CS_SUCCESS;
+} /* get_configuration_info */
+EXPORT_SYMBOL(pccard_get_configuration_info);
+
+/*======================================================================
+
+    Return information about this version of Card Services.
+    
+======================================================================*/
+
+int pcmcia_get_card_services_info(servinfo_t *info)
+{
+    unsigned int socket_count = 0;
+    struct list_head *tmp;
+    info->Signature[0] = 'C';
+    info->Signature[1] = 'S';
+    down_read(&pcmcia_socket_list_rwsem);
+    list_for_each(tmp, &pcmcia_socket_list)
+	    socket_count++;
+    up_read(&pcmcia_socket_list_rwsem);
+    info->Count = socket_count;
+    info->Revision = CS_RELEASE_CODE;
+    info->CSLevel = 0x0210;
+    info->VendorString = (char *)release;
+    return CS_SUCCESS;
+} /* get_card_services_info */
+
+
+/*====================================================================*/
+
+int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle, int idx, win_req_t *req)
+{
+    window_t *win;
+    int w;
+
+    if (!s || !(s->state & SOCKET_PRESENT))
+	return CS_NO_CARD;
+    for (w = idx; w < MAX_WIN; w++)
+	if (s->state & SOCKET_WIN_REQ(w)) break;
+    if (w == MAX_WIN)
+	return CS_NO_MORE_ITEMS;
+    win = &s->win[w];
+    req->Base = win->ctl.res->start;
+    req->Size = win->ctl.res->end - win->ctl.res->start + 1;
+    req->AccessSpeed = win->ctl.speed;
+    req->Attributes = 0;
+    if (win->ctl.flags & MAP_ATTRIB)
+	req->Attributes |= WIN_MEMORY_TYPE_AM;
+    if (win->ctl.flags & MAP_ACTIVE)
+	req->Attributes |= WIN_ENABLE;
+    if (win->ctl.flags & MAP_16BIT)
+	req->Attributes |= WIN_DATA_WIDTH_16;
+    if (win->ctl.flags & MAP_USE_WAIT)
+	req->Attributes |= WIN_USE_WAIT;
+    *handle = win;
+    return CS_SUCCESS;
+} /* get_window */
+EXPORT_SYMBOL(pcmcia_get_window);
+
+/*=====================================================================
+
+    Return the PCI device associated with a card..
+
+======================================================================*/
+
+#ifdef CONFIG_CARDBUS
+
+struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s)
+{
+	if (!s || !(s->state & SOCKET_CARDBUS))
+		return NULL;
+
+	return s->cb_dev->subordinate;
+}
+
+EXPORT_SYMBOL(pcmcia_lookup_bus);
+
+#endif
+
+/*======================================================================
+
+    Get the current socket state bits.  We don't support the latched
+    SocketState yet: I haven't seen any point for it.
+    
+======================================================================*/
+
+int pccard_get_status(struct pcmcia_socket *s, unsigned int function, cs_status_t *status)
+{
+    config_t *c;
+    int val;
+    
+    s->ops->get_status(s, &val);
+    status->CardState = status->SocketState = 0;
+    status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
+    status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
+    status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
+    status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
+    if (s->state & SOCKET_SUSPEND)
+	status->CardState |= CS_EVENT_PM_SUSPEND;
+    if (!(s->state & SOCKET_PRESENT))
+	return CS_NO_CARD;
+    
+    c = (s->config != NULL) ? &s->config[function] : NULL;
+    if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
+	(c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
+	u_char reg;
+	if (c->Present & PRESENT_PIN_REPLACE) {
+	    read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
+	    status->CardState |=
+		(reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
+	    status->CardState |=
+		(reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
+	    status->CardState |=
+		(reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
+	    status->CardState |=
+		(reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
+	} else {
+	    /* No PRR?  Then assume we're always ready */
+	    status->CardState |= CS_EVENT_READY_CHANGE;
+	}
+	if (c->Present & PRESENT_EXT_STATUS) {
+	    read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
+	    status->CardState |=
+		(reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
+	}
+	return CS_SUCCESS;
+    }
+    status->CardState |=
+	(val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
+    status->CardState |=
+	(val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
+    status->CardState |=
+	(val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
+    status->CardState |=
+	(val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
+    return CS_SUCCESS;
+} /* get_status */
+EXPORT_SYMBOL(pccard_get_status);
+
+/*======================================================================
+
+    Change the card address of an already open memory window.
+    
+======================================================================*/
+
+int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
+{
+    if ((win == NULL) || (win->magic != WINDOW_MAGIC))
+	return CS_BAD_HANDLE;
+    req->Page = 0;
+    req->CardOffset = win->ctl.card_start;
+    return CS_SUCCESS;
+} /* get_mem_page */
+
+int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
+{
+    struct pcmcia_socket *s;
+    if ((win == NULL) || (win->magic != WINDOW_MAGIC))
+	return CS_BAD_HANDLE;
+    if (req->Page != 0)
+	return CS_BAD_PAGE;
+    s = win->sock;
+    win->ctl.card_start = req->CardOffset;
+    if (s->ops->set_mem_map(s, &win->ctl) != 0)
+	return CS_BAD_OFFSET;
+    return CS_SUCCESS;
+} /* map_mem_page */
+
+/*======================================================================
+
+    Modify a locked socket configuration
+    
+======================================================================*/
+
+int pcmcia_modify_configuration(client_handle_t handle,
+				modconf_t *mod)
+{
+    struct pcmcia_socket *s;
+    config_t *c;
+    
+    if (CHECK_HANDLE(handle))
+	return CS_BAD_HANDLE;
+    s = SOCKET(handle); c = CONFIG(handle);
+    if (!(s->state & SOCKET_PRESENT))
+	return CS_NO_CARD;
+    if (!(c->state & CONFIG_LOCKED))
+	return CS_CONFIGURATION_LOCKED;
+    
+    if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
+	if (mod->Attributes & CONF_ENABLE_IRQ) {
+	    c->Attributes |= CONF_ENABLE_IRQ;
+	    s->socket.io_irq = s->irq.AssignedIRQ;
+	} else {
+	    c->Attributes &= ~CONF_ENABLE_IRQ;
+	    s->socket.io_irq = 0;
+	}
+	s->ops->set_socket(s, &s->socket);
+    }
+
+    if (mod->Attributes & CONF_VCC_CHANGE_VALID)
+	return CS_BAD_VCC;
+
+    /* We only allow changing Vpp1 and Vpp2 to the same value */
+    if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
+	(mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
+	if (mod->Vpp1 != mod->Vpp2)
+	    return CS_BAD_VPP;
+	c->Vpp1 = c->Vpp2 = s->socket.Vpp = mod->Vpp1;
+	if (s->ops->set_socket(s, &s->socket))
+	    return CS_BAD_VPP;
+    } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
+	       (mod->Attributes & CONF_VPP2_CHANGE_VALID))
+	return CS_BAD_VPP;
+
+    return CS_SUCCESS;
+} /* modify_configuration */
+
+/* register pcmcia_callback */
+int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
+{
+        int ret = 0;
+
+	/* s->skt_sem also protects s->callback */
+	down(&s->skt_sem);
+
+	if (c) {
+		/* registration */
+		if (s->callback) {
+			ret = -EBUSY;
+			goto err;
+		}
+
+		s->callback = c;
+
+		if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
+			send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
+	} else
+		s->callback = NULL;
+ err:
+	up(&s->skt_sem);
+
+	return ret;
+}
+EXPORT_SYMBOL(pccard_register_pcmcia);
+
+/*====================================================================*/
+
+int pcmcia_release_configuration(client_handle_t handle)
+{
+    pccard_io_map io = { 0, 0, 0, 0, 1 };
+    struct pcmcia_socket *s;
+    int i;
+    
+    if (CHECK_HANDLE(handle) ||
+	!(handle->state & CLIENT_CONFIG_LOCKED))
+	return CS_BAD_HANDLE;
+    handle->state &= ~CLIENT_CONFIG_LOCKED;
+    s = SOCKET(handle);
+    
+#ifdef CONFIG_CARDBUS
+    if (handle->state & CLIENT_CARDBUS)
+	return CS_SUCCESS;
+#endif
+    
+    if (!(handle->state & CLIENT_STALE)) {
+	config_t *c = CONFIG(handle);
+	if (--(s->lock_count) == 0) {
+	    s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
+	    s->socket.Vpp = 0;
+	    s->socket.io_irq = 0;
+	    s->ops->set_socket(s, &s->socket);
+	}
+	if (c->state & CONFIG_IO_REQ)
+	    for (i = 0; i < MAX_IO_WIN; i++) {
+		if (s->io[i].NumPorts == 0)
+		    continue;
+		s->io[i].Config--;
+		if (s->io[i].Config != 0)
+		    continue;
+		io.map = i;
+		s->ops->set_io_map(s, &io);
+	    }
+	c->state &= ~CONFIG_LOCKED;
+    }
+    
+    return CS_SUCCESS;
+} /* release_configuration */
+
+/*======================================================================
+
+    Release_io() releases the I/O ranges allocated by a client.  This
+    may be invoked some time after a card ejection has already dumped
+    the actual socket configuration, so if the client is "stale", we
+    don't bother checking the port ranges against the current socket
+    values.
+    
+======================================================================*/
+
+int pcmcia_release_io(client_handle_t handle, io_req_t *req)
+{
+    struct pcmcia_socket *s;
+    
+    if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IO_REQ))
+	return CS_BAD_HANDLE;
+    handle->state &= ~CLIENT_IO_REQ;
+    s = SOCKET(handle);
+    
+#ifdef CONFIG_CARDBUS
+    if (handle->state & CLIENT_CARDBUS)
+	return CS_SUCCESS;
+#endif
+    
+    if (!(handle->state & CLIENT_STALE)) {
+	config_t *c = CONFIG(handle);
+	if (c->state & CONFIG_LOCKED)
+	    return CS_CONFIGURATION_LOCKED;
+	if ((c->io.BasePort1 != req->BasePort1) ||
+	    (c->io.NumPorts1 != req->NumPorts1) ||
+	    (c->io.BasePort2 != req->BasePort2) ||
+	    (c->io.NumPorts2 != req->NumPorts2))
+	    return CS_BAD_ARGS;
+	c->state &= ~CONFIG_IO_REQ;
+    }
+
+    release_io_space(s, req->BasePort1, req->NumPorts1);
+    if (req->NumPorts2)
+	release_io_space(s, req->BasePort2, req->NumPorts2);
+    
+    return CS_SUCCESS;
+} /* release_io */
+
+/*====================================================================*/
+
+int pcmcia_release_irq(client_handle_t handle, irq_req_t *req)
+{
+    struct pcmcia_socket *s;
+    if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IRQ_REQ))
+	return CS_BAD_HANDLE;
+    handle->state &= ~CLIENT_IRQ_REQ;
+    s = SOCKET(handle);
+    
+    if (!(handle->state & CLIENT_STALE)) {
+	config_t *c = CONFIG(handle);
+	if (c->state & CONFIG_LOCKED)
+	    return CS_CONFIGURATION_LOCKED;
+	if (c->irq.Attributes != req->Attributes)
+	    return CS_BAD_ATTRIBUTE;
+	if (s->irq.AssignedIRQ != req->AssignedIRQ)
+	    return CS_BAD_IRQ;
+	if (--s->irq.Config == 0) {
+	    c->state &= ~CONFIG_IRQ_REQ;
+	    s->irq.AssignedIRQ = 0;
+	}
+    }
+    
+    if (req->Attributes & IRQ_HANDLE_PRESENT) {
+	free_irq(req->AssignedIRQ, req->Instance);
+    }
+
+#ifdef CONFIG_PCMCIA_PROBE
+    pcmcia_used_irq[req->AssignedIRQ]--;
+#endif
+
+    return CS_SUCCESS;
+} /* cs_release_irq */
+
+/*====================================================================*/
+
+int pcmcia_release_window(window_handle_t win)
+{
+    struct pcmcia_socket *s;
+    
+    if ((win == NULL) || (win->magic != WINDOW_MAGIC))
+	return CS_BAD_HANDLE;
+    s = win->sock;
+    if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
+	return CS_BAD_HANDLE;
+
+    /* Shut down memory window */
+    win->ctl.flags &= ~MAP_ACTIVE;
+    s->ops->set_mem_map(s, &win->ctl);
+    s->state &= ~SOCKET_WIN_REQ(win->index);
+
+    /* Release system memory */
+    if (win->ctl.res) {
+	release_resource(win->ctl.res);
+	kfree(win->ctl.res);
+	win->ctl.res = NULL;
+    }
+    win->handle->state &= ~CLIENT_WIN_REQ(win->index);
+
+    win->magic = 0;
+    
+    return CS_SUCCESS;
+} /* release_window */
+
+/*====================================================================*/
+
+int pcmcia_request_configuration(client_handle_t handle,
+				 config_req_t *req)
+{
+    int i;
+    u_int base;
+    struct pcmcia_socket *s;
+    config_t *c;
+    pccard_io_map iomap;
+    
+    if (CHECK_HANDLE(handle))
+	return CS_BAD_HANDLE;
+    s = SOCKET(handle);
+    if (!(s->state & SOCKET_PRESENT))
+	return CS_NO_CARD;
+    
+#ifdef CONFIG_CARDBUS
+    if (handle->state & CLIENT_CARDBUS)
+	return CS_UNSUPPORTED_MODE;
+#endif
+    
+    if (req->IntType & INT_CARDBUS)
+	return CS_UNSUPPORTED_MODE;
+    c = CONFIG(handle);
+    if (c->state & CONFIG_LOCKED)
+	return CS_CONFIGURATION_LOCKED;
+
+    /* Do power control.  We don't allow changes in Vcc. */
+    if (s->socket.Vcc != req->Vcc)
+	return CS_BAD_VCC;
+    if (req->Vpp1 != req->Vpp2)
+	return CS_BAD_VPP;
+    s->socket.Vpp = req->Vpp1;
+    if (s->ops->set_socket(s, &s->socket))
+	return CS_BAD_VPP;
+    
+    c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
+    
+    /* Pick memory or I/O card, DMA mode, interrupt */
+    c->IntType = req->IntType;
+    c->Attributes = req->Attributes;
+    if (req->IntType & INT_MEMORY_AND_IO)
+	s->socket.flags |= SS_IOCARD;
+    if (req->IntType & INT_ZOOMED_VIDEO)
+	s->socket.flags |= SS_ZVCARD | SS_IOCARD;
+    if (req->Attributes & CONF_ENABLE_DMA)
+	s->socket.flags |= SS_DMA_MODE;
+    if (req->Attributes & CONF_ENABLE_SPKR)
+	s->socket.flags |= SS_SPKR_ENA;
+    if (req->Attributes & CONF_ENABLE_IRQ)
+	s->socket.io_irq = s->irq.AssignedIRQ;
+    else
+	s->socket.io_irq = 0;
+    s->ops->set_socket(s, &s->socket);
+    s->lock_count++;
+    
+    /* Set up CIS configuration registers */
+    base = c->ConfigBase = req->ConfigBase;
+    c->Present = c->CardValues = req->Present;
+    if (req->Present & PRESENT_COPY) {
+	c->Copy = req->Copy;
+	write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
+    }
+    if (req->Present & PRESENT_OPTION) {
+	if (s->functions == 1) {
+	    c->Option = req->ConfigIndex & COR_CONFIG_MASK;
+	} else {
+	    c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
+	    c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
+	    if (req->Present & PRESENT_IOBASE_0)
+		c->Option |= COR_ADDR_DECODE;
+	}
+	if (c->state & CONFIG_IRQ_REQ)
+	    if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
+		c->Option |= COR_LEVEL_REQ;
+	write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
+	mdelay(40);
+    }
+    if (req->Present & PRESENT_STATUS) {
+	c->Status = req->Status;
+	write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
+    }
+    if (req->Present & PRESENT_PIN_REPLACE) {
+	c->Pin = req->Pin;
+	write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
+    }
+    if (req->Present & PRESENT_EXT_STATUS) {
+	c->ExtStatus = req->ExtStatus;
+	write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
+    }
+    if (req->Present & PRESENT_IOBASE_0) {
+	u_char b = c->io.BasePort1 & 0xff;
+	write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
+	b = (c->io.BasePort1 >> 8) & 0xff;
+	write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
+    }
+    if (req->Present & PRESENT_IOSIZE) {
+	u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
+	write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
+    }
+    
+    /* Configure I/O windows */
+    if (c->state & CONFIG_IO_REQ) {
+	iomap.speed = io_speed;
+	for (i = 0; i < MAX_IO_WIN; i++)
+	    if (s->io[i].NumPorts != 0) {
+		iomap.map = i;
+		iomap.flags = MAP_ACTIVE;
+		switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
+		case IO_DATA_PATH_WIDTH_16:
+		    iomap.flags |= MAP_16BIT; break;
+		case IO_DATA_PATH_WIDTH_AUTO:
+		    iomap.flags |= MAP_AUTOSZ; break;
+		default:
+		    break;
+		}
+		iomap.start = s->io[i].BasePort;
+		iomap.stop = iomap.start + s->io[i].NumPorts - 1;
+		s->ops->set_io_map(s, &iomap);
+		s->io[i].Config++;
+	    }
+    }
+    
+    c->state |= CONFIG_LOCKED;
+    handle->state |= CLIENT_CONFIG_LOCKED;
+    return CS_SUCCESS;
+} /* request_configuration */
+
+/*======================================================================
+  
+    Request_io() reserves ranges of port addresses for a socket.
+    I have not implemented range sharing or alias addressing.
+    
+======================================================================*/
+
+int pcmcia_request_io(client_handle_t handle, io_req_t *req)
+{
+    struct pcmcia_socket *s;
+    config_t *c;
+    
+    if (CHECK_HANDLE(handle))
+	return CS_BAD_HANDLE;
+    s = SOCKET(handle);
+    if (!(s->state & SOCKET_PRESENT))
+	return CS_NO_CARD;
+
+    if (handle->state & CLIENT_CARDBUS) {
+#ifdef CONFIG_CARDBUS
+	handle->state |= CLIENT_IO_REQ;
+	return CS_SUCCESS;
+#else
+	return CS_UNSUPPORTED_FUNCTION;
+#endif
+    }
+
+    if (!req)
+	return CS_UNSUPPORTED_MODE;
+    c = CONFIG(handle);
+    if (c->state & CONFIG_LOCKED)
+	return CS_CONFIGURATION_LOCKED;
+    if (c->state & CONFIG_IO_REQ)
+	return CS_IN_USE;
+    if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
+	return CS_BAD_ATTRIBUTE;
+    if ((req->NumPorts2 > 0) &&
+	(req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
+	return CS_BAD_ATTRIBUTE;
+
+    if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
+		       req->NumPorts1, req->IOAddrLines))
+	return CS_IN_USE;
+
+    if (req->NumPorts2) {
+	if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
+			   req->NumPorts2, req->IOAddrLines)) {
+	    release_io_space(s, req->BasePort1, req->NumPorts1);
+	    return CS_IN_USE;
+	}
+    }
+
+    c->io = *req;
+    c->state |= CONFIG_IO_REQ;
+    handle->state |= CLIENT_IO_REQ;
+    return CS_SUCCESS;
+} /* request_io */
+
+/*======================================================================
+
+    Request_irq() reserves an irq for this client.
+
+    Also, since Linux only reserves irq's when they are actually
+    hooked, we don't guarantee that an irq will still be available
+    when the configuration is locked.  Now that I think about it,
+    there might be a way to fix this using a dummy handler.
+    
+======================================================================*/
+
+#ifdef CONFIG_PCMCIA_PROBE
+static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
+{
+	return IRQ_NONE;
+}
+#endif
+
+int pcmcia_request_irq(client_handle_t handle, irq_req_t *req)
+{
+	struct pcmcia_socket *s;
+	config_t *c;
+	int ret = CS_IN_USE, irq = 0;
+	struct pcmcia_device *p_dev = handle_to_pdev(handle);
+
+	if (CHECK_HANDLE(handle))
+		return CS_BAD_HANDLE;
+	s = SOCKET(handle);
+	if (!(s->state & SOCKET_PRESENT))
+		return CS_NO_CARD;
+	c = CONFIG(handle);
+	if (c->state & CONFIG_LOCKED)
+		return CS_CONFIGURATION_LOCKED;
+	if (c->state & CONFIG_IRQ_REQ)
+		return CS_IN_USE;
+
+#ifdef CONFIG_PCMCIA_PROBE
+	if (s->irq.AssignedIRQ != 0) {
+		/* If the interrupt is already assigned, it must be the same */
+		irq = s->irq.AssignedIRQ;
+	} else {
+		int try;
+		u32 mask = s->irq_mask;
+		void *data = NULL;
+
+		for (try = 0; try < 64; try++) {
+			irq = try % 32;
+
+			/* marked as available by driver, and not blocked by userspace? */
+			if (!((mask >> irq) & 1))
+				continue;
+
+			/* avoid an IRQ which is already used by a PCMCIA card */
+			if ((try < 32) && pcmcia_used_irq[irq])
+				continue;
+
+			/* register the correct driver, if possible, of check whether
+			 * registering a dummy handle works, i.e. if the IRQ isn't
+			 * marked as used by the kernel resource management core */
+			ret = request_irq(irq,
+					  (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
+					  ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
+					   (s->functions > 1) ||
+					   (irq == s->pci_irq)) ? SA_SHIRQ : 0,
+					  p_dev->dev.bus_id,
+					  (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
+			if (!ret) {
+				if (!(req->Attributes & IRQ_HANDLE_PRESENT))
+					free_irq(irq, data);
+				break;
+			}
+		}
+	}
+#endif
+	if (ret) {
+		if (!s->pci_irq)
+			return ret;
+		irq = s->pci_irq;
+	}
+
+	if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
+		if (request_irq(irq, req->Handler,
+				((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
+				 (s->functions > 1) ||
+				 (irq == s->pci_irq)) ? SA_SHIRQ : 0,
+				p_dev->dev.bus_id, req->Instance))
+			return CS_IN_USE;
+	}
+
+	c->irq.Attributes = req->Attributes;
+	s->irq.AssignedIRQ = req->AssignedIRQ = irq;
+	s->irq.Config++;
+
+	c->state |= CONFIG_IRQ_REQ;
+	handle->state |= CLIENT_IRQ_REQ;
+
+#ifdef CONFIG_PCMCIA_PROBE
+	pcmcia_used_irq[irq]++;
+#endif
+
+	return CS_SUCCESS;
+} /* pcmcia_request_irq */
+
+/*======================================================================
+
+    Request_window() establishes a mapping between card memory space
+    and system memory space.
+
+======================================================================*/
+
+int pcmcia_request_window(client_handle_t *handle, win_req_t *req, window_handle_t *wh)
+{
+    struct pcmcia_socket *s;
+    window_t *win;
+    u_long align;
+    int w;
+    
+    if (CHECK_HANDLE(*handle))
+	return CS_BAD_HANDLE;
+    s = (*handle)->Socket;
+    if (!(s->state & SOCKET_PRESENT))
+	return CS_NO_CARD;
+    if (req->Attributes & (WIN_PAGED | WIN_SHARED))
+	return CS_BAD_ATTRIBUTE;
+
+    /* Window size defaults to smallest available */
+    if (req->Size == 0)
+	req->Size = s->map_size;
+    align = (((s->features & SS_CAP_MEM_ALIGN) ||
+	      (req->Attributes & WIN_STRICT_ALIGN)) ?
+	     req->Size : s->map_size);
+    if (req->Size & (s->map_size-1))
+	return CS_BAD_SIZE;
+    if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
+	(req->Base & (align-1)))
+	return CS_BAD_BASE;
+    if (req->Base)
+	align = 0;
+
+    /* Allocate system memory window */
+    for (w = 0; w < MAX_WIN; w++)
+	if (!(s->state & SOCKET_WIN_REQ(w))) break;
+    if (w == MAX_WIN)
+	return CS_OUT_OF_RESOURCE;
+
+    win = &s->win[w];
+    win->magic = WINDOW_MAGIC;
+    win->index = w;
+    win->handle = *handle;
+    win->sock = s;
+
+    if (!(s->features & SS_CAP_STATIC_MAP)) {
+	win->ctl.res = find_mem_region(req->Base, req->Size, align,
+				       (req->Attributes & WIN_MAP_BELOW_1MB), s);
+	if (!win->ctl.res)
+	    return CS_IN_USE;
+    }
+    (*handle)->state |= CLIENT_WIN_REQ(w);
+
+    /* Configure the socket controller */
+    win->ctl.map = w+1;
+    win->ctl.flags = 0;
+    win->ctl.speed = req->AccessSpeed;
+    if (req->Attributes & WIN_MEMORY_TYPE)
+	win->ctl.flags |= MAP_ATTRIB;
+    if (req->Attributes & WIN_ENABLE)
+	win->ctl.flags |= MAP_ACTIVE;
+    if (req->Attributes & WIN_DATA_WIDTH_16)
+	win->ctl.flags |= MAP_16BIT;
+    if (req->Attributes & WIN_USE_WAIT)
+	win->ctl.flags |= MAP_USE_WAIT;
+    win->ctl.card_start = 0;
+    if (s->ops->set_mem_map(s, &win->ctl) != 0)
+	return CS_BAD_ARGS;
+    s->state |= SOCKET_WIN_REQ(w);
+
+    /* Return window handle */
+    if (s->features & SS_CAP_STATIC_MAP) {
+	req->Base = win->ctl.static_start;
+    } else {
+	req->Base = win->ctl.res->start;
+    }
+    *wh = win;
+    
+    return CS_SUCCESS;
+} /* request_window */
+
+/*======================================================================
+
+    I'm not sure which "reset" function this is supposed to use,
+    but for now, it uses the low-level interface's reset, not the
+    CIS register.
+    
+======================================================================*/
+
+int pccard_reset_card(struct pcmcia_socket *skt)
+{
+	int ret;
+    
+	cs_dbg(skt, 1, "resetting socket\n");
+
+	down(&skt->skt_sem);
+	do {
+		if (!(skt->state & SOCKET_PRESENT)) {
+			ret = CS_NO_CARD;
+			break;
+		}
+		if (skt->state & SOCKET_SUSPEND) {
+			ret = CS_IN_USE;
+			break;
+		}
+		if (skt->state & SOCKET_CARDBUS) {
+			ret = CS_UNSUPPORTED_FUNCTION;
+			break;
+		}
+
+		ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
+		if (ret == 0) {
+			send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
+			if (socket_reset(skt) == CS_SUCCESS)
+				send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
+		}
+
+		ret = CS_SUCCESS;
+	} while (0);
+	up(&skt->skt_sem);
+
+	return ret;
+} /* reset_card */
+EXPORT_SYMBOL(pccard_reset_card);
+
+/*======================================================================
+
+    These shut down or wake up a socket.  They are sort of user
+    initiated versions of the APM suspend and resume actions.
+    
+======================================================================*/
+
+int pcmcia_suspend_card(struct pcmcia_socket *skt)
+{
+	int ret;
+    
+	cs_dbg(skt, 1, "suspending socket\n");
+
+	down(&skt->skt_sem);
+	do {
+		if (!(skt->state & SOCKET_PRESENT)) {
+			ret = CS_NO_CARD;
+			break;
+		}
+		if (skt->state & SOCKET_CARDBUS) {
+			ret = CS_UNSUPPORTED_FUNCTION;
+			break;
+		}
+		ret = socket_suspend(skt);
+	} while (0);
+	up(&skt->skt_sem);
+
+	return ret;
+} /* suspend_card */
+
+int pcmcia_resume_card(struct pcmcia_socket *skt)
+{
+	int ret;
+    
+	cs_dbg(skt, 1, "waking up socket\n");
+
+	down(&skt->skt_sem);
+	do {
+		if (!(skt->state & SOCKET_PRESENT)) {
+			ret = CS_NO_CARD;
+			break;
+		}
+		if (skt->state & SOCKET_CARDBUS) {
+			ret = CS_UNSUPPORTED_FUNCTION;
+			break;
+		}
+		ret = socket_resume(skt);
+	} while (0);
+	up(&skt->skt_sem);
+
+	return ret;
+} /* resume_card */
+
+/*======================================================================
+
+    These handle user requests to eject or insert a card.
+    
+======================================================================*/
+
+int pcmcia_eject_card(struct pcmcia_socket *skt)
+{
+	int ret;
+    
+	cs_dbg(skt, 1, "user eject request\n");
+
+	down(&skt->skt_sem);
+	do {
+		if (!(skt->state & SOCKET_PRESENT)) {
+			ret = -ENODEV;
+			break;
+		}
+
+		ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
+		if (ret != 0) {
+			ret = -EINVAL;
+			break;
+		}
+
+		socket_remove(skt);
+		ret = 0;
+	} while (0);
+	up(&skt->skt_sem);
+
+	return ret;
+} /* eject_card */
+
+int pcmcia_insert_card(struct pcmcia_socket *skt)
+{
+	int ret;
+
+	cs_dbg(skt, 1, "user insert request\n");
+
+	down(&skt->skt_sem);
+	do {
+		if (skt->state & SOCKET_PRESENT) {
+			ret = -EBUSY;
+			break;
+		}
+		if (socket_insert(skt) == CS_NO_CARD) {
+			ret = -ENODEV;
+			break;
+		}
+		ret = 0;
+	} while (0);
+	up(&skt->skt_sem);
+
+	return ret;
+} /* insert_card */
+
+/*======================================================================
+
+    OS-specific module glue goes here
+    
+======================================================================*/
+/* in alpha order */
+EXPORT_SYMBOL(pcmcia_eject_card);
+EXPORT_SYMBOL(pcmcia_get_card_services_info);
+EXPORT_SYMBOL(pcmcia_get_mem_page);
+EXPORT_SYMBOL(pcmcia_insert_card);
+EXPORT_SYMBOL(pcmcia_map_mem_page);
+EXPORT_SYMBOL(pcmcia_modify_configuration);
+EXPORT_SYMBOL(pcmcia_release_configuration);
+EXPORT_SYMBOL(pcmcia_release_io);
+EXPORT_SYMBOL(pcmcia_release_irq);
+EXPORT_SYMBOL(pcmcia_release_window);
+EXPORT_SYMBOL(pcmcia_replace_cis);
+EXPORT_SYMBOL(pcmcia_request_configuration);
+EXPORT_SYMBOL(pcmcia_request_io);
+EXPORT_SYMBOL(pcmcia_request_irq);
+EXPORT_SYMBOL(pcmcia_request_window);
+EXPORT_SYMBOL(pcmcia_resume_card);
+EXPORT_SYMBOL(pcmcia_suspend_card);
+
+EXPORT_SYMBOL(dead_socket);
+EXPORT_SYMBOL(pcmcia_parse_events);
+
+struct class pcmcia_socket_class = {
+	.name = "pcmcia_socket",
+	.release = pcmcia_release_socket,
+};
+EXPORT_SYMBOL(pcmcia_socket_class);
+
+
+static int __init init_pcmcia_cs(void)
+{
+	int ret;
+	printk(KERN_INFO "%s\n", release);
+	printk(KERN_INFO "  %s\n", options);
+
+	ret = class_register(&pcmcia_socket_class);
+	if (ret)
+		return (ret);
+	return class_interface_register(&pccard_sysfs_interface);
+}
+
+static void __exit exit_pcmcia_cs(void)
+{
+    printk(KERN_INFO "unloading Kernel Card Services\n");
+    class_interface_unregister(&pccard_sysfs_interface);
+    class_unregister(&pcmcia_socket_class);
+}
+
+subsys_initcall(init_pcmcia_cs);
+module_exit(exit_pcmcia_cs);
+
+/*====================================================================*/
+