ds.c 37.8 KB
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/*
 * ds.c -- 16-bit PCMCIA core support
 *
 * 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
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 * (C) 2003 - 2006	Dominik Brodowski
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 */

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#include <linux/kernel.h>
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#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
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#include <linux/crc32.h>
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#include <linux/firmware.h>
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#include <linux/kref.h>
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#include <linux/dma-mapping.h>
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#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/ss.h>

#include "cs_internal.h"

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

/* Module parameters */

MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
MODULE_DESCRIPTION("PCMCIA Driver Services");
MODULE_LICENSE("GPL");

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#ifdef CONFIG_PCMCIA_DEBUG
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int ds_pc_debug;
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module_param_named(pc_debug, ds_pc_debug, int, 0644);

#define ds_dbg(lvl, fmt, arg...) do {				\
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	if (ds_pc_debug > (lvl))				\
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		printk(KERN_DEBUG "ds: " fmt , ## arg);		\
} while (0)
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#define ds_dev_dbg(lvl, dev, fmt, arg...) do {				\
	if (ds_pc_debug > (lvl))					\
		dev_printk(KERN_DEBUG, dev, "ds: " fmt , ## arg);	\
} while (0)
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#else
#define ds_dbg(lvl, fmt, arg...) do { } while (0)
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#define ds_dev_dbg(lvl, dev, fmt, arg...) do { } while (0)
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#endif

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spinlock_t pcmcia_dev_list_lock;
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/*====================================================================*/

/* code which was in cs.c before */

/* String tables for error messages */

typedef struct lookup_t {
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    const int key;
    const char *msg;
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} lookup_t;

static const lookup_t error_table[] = {
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    { 0,			"Operation succeeded" },
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    { -EIO,			"Input/Output error" },
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    { -ENODEV,			"No card present" },
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    { -EINVAL,			"Bad parameter" },
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    { -EACCES,			"Configuration locked" },
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    { -EBUSY,			"Resource in use" },
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    { -ENOSPC,			"No more items" },
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    { -ENOMEM,			"Out of resource" },
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};


static const lookup_t service_table[] = {
    { AccessConfigurationRegister,	"AccessConfigurationRegister" },
    { AddSocketServices,		"AddSocketServices" },
    { AdjustResourceInfo,		"AdjustResourceInfo" },
    { CheckEraseQueue,			"CheckEraseQueue" },
    { CloseMemory,			"CloseMemory" },
    { DeregisterClient,			"DeregisterClient" },
    { DeregisterEraseQueue,		"DeregisterEraseQueue" },
    { GetCardServicesInfo,		"GetCardServicesInfo" },
    { GetClientInfo,			"GetClientInfo" },
    { GetConfigurationInfo,		"GetConfigurationInfo" },
    { GetEventMask,			"GetEventMask" },
    { GetFirstClient,			"GetFirstClient" },
    { GetFirstRegion,			"GetFirstRegion" },
    { GetFirstTuple,			"GetFirstTuple" },
    { GetNextClient,			"GetNextClient" },
    { GetNextRegion,			"GetNextRegion" },
    { GetNextTuple,			"GetNextTuple" },
    { GetStatus,			"GetStatus" },
    { GetTupleData,			"GetTupleData" },
    { MapMemPage,			"MapMemPage" },
    { ModifyConfiguration,		"ModifyConfiguration" },
    { ModifyWindow,			"ModifyWindow" },
    { OpenMemory,			"OpenMemory" },
    { ParseTuple,			"ParseTuple" },
    { ReadMemory,			"ReadMemory" },
    { RegisterClient,			"RegisterClient" },
    { RegisterEraseQueue,		"RegisterEraseQueue" },
    { RegisterMTD,			"RegisterMTD" },
    { ReleaseConfiguration,		"ReleaseConfiguration" },
    { ReleaseIO,			"ReleaseIO" },
    { ReleaseIRQ,			"ReleaseIRQ" },
    { ReleaseWindow,			"ReleaseWindow" },
    { RequestConfiguration,		"RequestConfiguration" },
    { RequestIO,			"RequestIO" },
    { RequestIRQ,			"RequestIRQ" },
    { RequestSocketMask,		"RequestSocketMask" },
    { RequestWindow,			"RequestWindow" },
    { ResetCard,			"ResetCard" },
    { SetEventMask,			"SetEventMask" },
    { ValidateCIS,			"ValidateCIS" },
    { WriteMemory,			"WriteMemory" },
    { BindDevice,			"BindDevice" },
    { BindMTD,				"BindMTD" },
    { ReportError,			"ReportError" },
    { SuspendCard,			"SuspendCard" },
    { ResumeCard,			"ResumeCard" },
    { EjectCard,			"EjectCard" },
    { InsertCard,			"InsertCard" },
    { ReplaceCIS,			"ReplaceCIS" }
};

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const char *pcmcia_error_func(int func)
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{
	int i;

	for (i = 0; i < ARRAY_SIZE(service_table); i++)
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		if (service_table[i].key == func)
			return service_table[i].msg;
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	return "Unknown service number";
}
EXPORT_SYMBOL(pcmcia_error_func);
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const char *pcmcia_error_ret(int ret)
{
	int i;
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	for (i = 0; i < ARRAY_SIZE(error_table); i++)
		if (error_table[i].key == ret)
			return error_table[i].msg;
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	return "unknown";
}
EXPORT_SYMBOL(pcmcia_error_ret);
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/*======================================================================*/


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static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
{
	struct pcmcia_device_id *did = p_drv->id_table;
	unsigned int i;
	u32 hash;

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	if (!p_drv->probe || !p_drv->remove)
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		printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
		       "function\n", p_drv->drv.name);
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	while (did && did->match_flags) {
		for (i=0; i<4; i++) {
			if (!did->prod_id[i])
				continue;

			hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
			if (hash == did->prod_id_hash[i])
				continue;

			printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
			       "product string \"%s\": is 0x%x, should "
			       "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
			       did->prod_id_hash[i], hash);
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			printk(KERN_DEBUG "pcmcia: see "
				"Documentation/pcmcia/devicetable.txt for "
				"details\n");
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		}
		did++;
	}

	return;
}

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


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struct pcmcia_dynid {
	struct list_head 		node;
	struct pcmcia_device_id 	id;
};

/**
 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
 * @driver: target device driver
 * @buf: buffer for scanning device ID data
 * @count: input size
 *
 * Adds a new dynamic PCMCIA device ID to this driver,
 * and causes the driver to probe for all devices again.
 */
static ssize_t
pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
{
	struct pcmcia_dynid *dynid;
	struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
	__u16 match_flags, manf_id, card_id;
	__u8 func_id, function, device_no;
	__u32 prod_id_hash[4] = {0, 0, 0, 0};
	int fields=0;
	int retval = 0;

	fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
			&match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
			&prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
	if (fields < 6)
		return -EINVAL;

	dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
	if (!dynid)
		return -ENOMEM;

	INIT_LIST_HEAD(&dynid->node);
	dynid->id.match_flags = match_flags;
	dynid->id.manf_id = manf_id;
	dynid->id.card_id = card_id;
	dynid->id.func_id = func_id;
	dynid->id.function = function;
	dynid->id.device_no = device_no;
	memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);

	spin_lock(&pdrv->dynids.lock);
	list_add_tail(&pdrv->dynids.list, &dynid->node);
	spin_unlock(&pdrv->dynids.lock);

	if (get_driver(&pdrv->drv)) {
		retval = driver_attach(&pdrv->drv);
		put_driver(&pdrv->drv);
	}

	if (retval)
		return retval;
	return count;
}
static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);

static void
pcmcia_free_dynids(struct pcmcia_driver *drv)
{
	struct pcmcia_dynid *dynid, *n;

	spin_lock(&drv->dynids.lock);
	list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
		list_del(&dynid->node);
		kfree(dynid);
	}
	spin_unlock(&drv->dynids.lock);
}

static int
pcmcia_create_newid_file(struct pcmcia_driver *drv)
{
	int error = 0;
	if (drv->probe != NULL)
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		error = driver_create_file(&drv->drv, &driver_attr_new_id);
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	return error;
}


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/**
 * pcmcia_register_driver - register a PCMCIA driver with the bus core
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 * @driver: the &driver being registered
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 *
 * Registers a PCMCIA driver with the PCMCIA bus core.
 */
int pcmcia_register_driver(struct pcmcia_driver *driver)
{
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	int error;

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	if (!driver)
		return -EINVAL;

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	pcmcia_check_driver(driver);

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	/* initialize common fields */
	driver->drv.bus = &pcmcia_bus_type;
	driver->drv.owner = driver->owner;
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	spin_lock_init(&driver->dynids.lock);
	INIT_LIST_HEAD(&driver->dynids.list);
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	ds_dbg(3, "registering driver %s\n", driver->drv.name);

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	error = driver_register(&driver->drv);
	if (error < 0)
		return error;

	error = pcmcia_create_newid_file(driver);
	if (error)
		driver_unregister(&driver->drv);

	return error;
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}
EXPORT_SYMBOL(pcmcia_register_driver);

/**
 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
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 * @driver: the &driver being unregistered
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 */
void pcmcia_unregister_driver(struct pcmcia_driver *driver)
{
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	ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
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	driver_unregister(&driver->drv);
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	pcmcia_free_dynids(driver);
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}
EXPORT_SYMBOL(pcmcia_unregister_driver);


/* pcmcia_device handling */

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struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
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{
	struct device *tmp_dev;
	tmp_dev = get_device(&p_dev->dev);
	if (!tmp_dev)
		return NULL;
	return to_pcmcia_dev(tmp_dev);
}

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void pcmcia_put_dev(struct pcmcia_device *p_dev)
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{
	if (p_dev)
		put_device(&p_dev->dev);
}

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static void pcmcia_release_function(struct kref *ref)
{
	struct config_t *c = container_of(ref, struct config_t, ref);
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	ds_dbg(1, "releasing config_t\n");
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	kfree(c);
}

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static void pcmcia_release_dev(struct device *dev)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
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	ds_dev_dbg(1, dev, "releasing device\n");
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	pcmcia_put_socket(p_dev->socket);
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	kfree(p_dev->devname);
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	kref_put(&p_dev->function_config->ref, pcmcia_release_function);
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	kfree(p_dev);
}

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static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
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{
	if (!s->pcmcia_state.device_add_pending) {
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		ds_dev_dbg(1, &s->dev, "scheduling to add %s secondary"
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		       " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
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		s->pcmcia_state.device_add_pending = 1;
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		s->pcmcia_state.mfc_pfc = mfc;
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		schedule_work(&s->device_add);
	}
	return;
}
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static int pcmcia_device_probe(struct device * dev)
{
	struct pcmcia_device *p_dev;
	struct pcmcia_driver *p_drv;
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	struct pcmcia_device_id *did;
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	struct pcmcia_socket *s;
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	cistpl_config_t cis_config;
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	int ret = 0;

	dev = get_device(dev);
	if (!dev)
		return -ENODEV;

	p_dev = to_pcmcia_dev(dev);
	p_drv = to_pcmcia_drv(dev->driver);
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	s = p_dev->socket;
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	/* The PCMCIA code passes the match data in via dev->driver_data
	 * which is an ugly hack. Once the driver probe is called it may
	 * and often will overwrite the match data so we must save it first
	 *
	 * handle pseudo multifunction devices:
	 * there are at most two pseudo multifunction devices.
	 * if we're matching against the first, schedule a
	 * call which will then check whether there are two
	 * pseudo devices, and if not, add the second one.
	 */
	did = p_dev->dev.driver_data;

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	ds_dev_dbg(1, dev, "trying to bind to %s\n", p_drv->drv.name);
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	if ((!p_drv->probe) || (!p_dev->function_config) ||
	    (!try_module_get(p_drv->owner))) {
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		ret = -EINVAL;
		goto put_dev;
	}

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	/* set up some more device information */
	ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
				&cis_config);
	if (!ret) {
		p_dev->conf.ConfigBase = cis_config.base;
		p_dev->conf.Present = cis_config.rmask[0];
	} else {
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		dev_printk(KERN_INFO, dev,
			   "pcmcia: could not parse base and rmask0 of CIS\n");
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		p_dev->conf.ConfigBase = 0;
		p_dev->conf.Present = 0;
	}

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	ret = p_drv->probe(p_dev);
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	if (ret) {
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		ds_dev_dbg(1, dev, "binding to %s failed with %d\n",
			   p_drv->drv.name, ret);
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		goto put_module;
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	}
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	if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
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	    (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
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		pcmcia_add_device_later(p_dev->socket, 0);
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put_module:
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	if (ret)
		module_put(p_drv->owner);
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put_dev:
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	if (ret)
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		put_device(dev);
	return (ret);
}


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/*
 * Removes a PCMCIA card from the device tree and socket list.
 */
static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
{
	struct pcmcia_device	*p_dev;
	struct pcmcia_device	*tmp;
	unsigned long		flags;

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	ds_dev_dbg(2, leftover ? &leftover->dev : &s->dev,
		   "pcmcia_card_remove(%d) %s\n", s->sock,
		   leftover ? leftover->devname : "");
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	if (!leftover)
		s->device_count = 0;
	else
		s->device_count = 1;

	/* unregister all pcmcia_devices registered with this socket, except leftover */
	list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
		if (p_dev == leftover)
			continue;

		spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
		list_del(&p_dev->socket_device_list);
		p_dev->_removed=1;
		spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

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		ds_dev_dbg(2, &p_dev->dev, "unregistering device\n");
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		device_unregister(&p_dev->dev);
	}

	return;
}

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static int pcmcia_device_remove(struct device * dev)
{
	struct pcmcia_device *p_dev;
	struct pcmcia_driver *p_drv;
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	struct pcmcia_device_id *did;
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	int i;
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	p_dev = to_pcmcia_dev(dev);
	p_drv = to_pcmcia_drv(dev->driver);
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	ds_dev_dbg(1, dev, "removing device\n");
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	/* If we're removing the primary module driving a
	 * pseudo multi-function card, we need to unbind
	 * all devices
	 */
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	did = p_dev->dev.driver_data;
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	if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
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	    (p_dev->socket->device_count != 0) &&
	    (p_dev->device_no == 0))
		pcmcia_card_remove(p_dev->socket, p_dev);

	/* detach the "instance" */
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	if (!p_drv)
		return 0;
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	if (p_drv->remove)
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	       	p_drv->remove(p_dev);

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	p_dev->dev_node = NULL;

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	/* check for proper unloading */
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	if (p_dev->_irq || p_dev->_io || p_dev->_locked)
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		dev_printk(KERN_INFO, dev,
			"pcmcia: driver %s did not release config properly\n",
			p_drv->drv.name);
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	for (i = 0; i < MAX_WIN; i++)
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		if (p_dev->_win & CLIENT_WIN_REQ(i))
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			dev_printk(KERN_INFO, dev,
			  "pcmcia: driver %s did not release window properly\n",
			   p_drv->drv.name);
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	/* references from pcmcia_probe_device */
	pcmcia_put_dev(p_dev);
	module_put(p_drv->owner);
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	return 0;
}


/*
 * pcmcia_device_query -- determine information about a pcmcia device
 */
static int pcmcia_device_query(struct pcmcia_device *p_dev)
{
	cistpl_manfid_t manf_id;
	cistpl_funcid_t func_id;
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	cistpl_vers_1_t	*vers1;
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	unsigned int i;

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	vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
	if (!vers1)
		return -ENOMEM;

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	if (!pccard_read_tuple(p_dev->socket, p_dev->func,
			       CISTPL_MANFID, &manf_id)) {
		p_dev->manf_id = manf_id.manf;
		p_dev->card_id = manf_id.card;
		p_dev->has_manf_id = 1;
		p_dev->has_card_id = 1;
	}

	if (!pccard_read_tuple(p_dev->socket, p_dev->func,
			       CISTPL_FUNCID, &func_id)) {
		p_dev->func_id = func_id.func;
		p_dev->has_func_id = 1;
	} else {
		/* rule of thumb: cards with no FUNCID, but with
		 * common memory device geometry information, are
		 * probably memory cards (from pcmcia-cs) */
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		cistpl_device_geo_t *devgeo;

		devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
		if (!devgeo) {
			kfree(vers1);
			return -ENOMEM;
		}
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		if (!pccard_read_tuple(p_dev->socket, p_dev->func,
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				      CISTPL_DEVICE_GEO, devgeo)) {
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			ds_dev_dbg(0, &p_dev->dev,
				   "mem device geometry probably means "
				   "FUNCID_MEMORY\n");
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			p_dev->func_id = CISTPL_FUNCID_MEMORY;
			p_dev->has_func_id = 1;
		}
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		kfree(devgeo);
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	}

	if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
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			       vers1)) {
		for (i=0; i < vers1->ns; i++) {
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			char *tmp;
			unsigned int length;

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			tmp = vers1->str + vers1->ofs[i];
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			length = strlen(tmp) + 1;
594
			if ((length < 2) || (length > 255))
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				continue;

			p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
						    GFP_KERNEL);
			if (!p_dev->prod_id[i])
				continue;

			p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
						    tmp, length);
		}
	}

607
	kfree(vers1);
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	return 0;
}


/* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 * Serializes pcmcia_device_add; will most likely be removed in future.
 *
 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 * won't work, this doesn't matter much at the moment: the driver core doesn't
 * support it either.
 */
619
static DEFINE_MUTEX(device_add_lock);
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621
struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
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{
623
	struct pcmcia_device *p_dev, *tmp_dev;
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	unsigned long flags;

626
	s = pcmcia_get_socket(s);
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	if (!s)
		return NULL;

630
	mutex_lock(&device_add_lock);
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631

632 633
	ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);

634 635
	/* max of 4 devices per card */
	if (s->device_count == 4)
636 637
		goto err_put;

638
	p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
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	if (!p_dev)
		goto err_put;

642
	p_dev->socket = s;
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	p_dev->device_no = (s->device_count++);
	p_dev->func   = function;

	p_dev->dev.bus = &pcmcia_bus_type;
647
	p_dev->dev.parent = s->dev.parent;
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	p_dev->dev.release = pcmcia_release_dev;
649 650 651
	/* by default don't allow DMA */
	p_dev->dma_mask = DMA_MASK_NONE;
	p_dev->dev.dma_mask = &p_dev->dma_mask;
652 653 654 655
	dev_set_name(&p_dev->dev, "%d.%d", p_dev->socket->sock, p_dev->device_no);
	if (!dev_name(&p_dev->dev))
		goto err_free;
	p_dev->devname = kasprintf(GFP_KERNEL, "pcmcia%s", dev_name(&p_dev->dev));
656 657
	if (!p_dev->devname)
		goto err_free;
658
	ds_dev_dbg(3, &p_dev->dev, "devname is %s\n", p_dev->devname);
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	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
661 662 663 664 665 666 667 668 669

	/*
	 * p_dev->function_config must be the same for all card functions.
	 * Note that this is serialized by the device_add_lock, so that
	 * only one such struct will be created.
	 */
        list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
                if (p_dev->func == tmp_dev->func) {
			p_dev->function_config = tmp_dev->function_config;
670 671
			p_dev->io = tmp_dev->io;
			p_dev->irq = tmp_dev->irq;
672 673 674 675
			kref_get(&p_dev->function_config->ref);
		}

	/* Add to the list in pcmcia_bus_socket */
676
	list_add(&p_dev->socket_device_list, &s->devices_list);
677

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	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

680
	if (!p_dev->function_config) {
681
		ds_dev_dbg(3, &p_dev->dev, "creating config_t\n");
682 683 684 685 686 687 688
		p_dev->function_config = kzalloc(sizeof(struct config_t),
						 GFP_KERNEL);
		if (!p_dev->function_config)
			goto err_unreg;
		kref_init(&p_dev->function_config->ref);
	}

689 690 691
	dev_printk(KERN_NOTICE, &p_dev->dev,
		   "pcmcia: registering new device %s\n",
		   p_dev->devname);
692

693 694
	pcmcia_device_query(p_dev);

695 696
	if (device_register(&p_dev->dev))
		goto err_unreg;
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697

698
	mutex_unlock(&device_add_lock);
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	return p_dev;

702 703 704 705 706
 err_unreg:
	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
	list_del(&p_dev->socket_device_list);
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

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 err_free:
708
	kfree(p_dev->devname);
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	kfree(p_dev);
	s->device_count--;
 err_put:
712
	mutex_unlock(&device_add_lock);
713
	pcmcia_put_socket(s);
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	return NULL;
}


static int pcmcia_card_add(struct pcmcia_socket *s)
{
	cistpl_longlink_mfc_t mfc;
722
	unsigned int no_funcs, i, no_chains;
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723 724
	int ret = 0;

725
	if (!(s->resource_setup_done)) {
726 727
		ds_dev_dbg(3, &s->dev,
			   "no resources available, delaying card_add\n");
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		return -EAGAIN; /* try again, but later... */
729
	}
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731
	if (pcmcia_validate_mem(s)) {
732
		ds_dev_dbg(3, &s->dev, "validating mem resources failed, "
733
		       "delaying card_add\n");
734
		return -EAGAIN; /* try again, but later... */
735
	}
736

737 738
	ret = pccard_validate_cis(s, BIND_FN_ALL, &no_chains);
	if (ret || !no_chains) {
739
		ds_dev_dbg(0, &s->dev, "invalid CIS or invalid resources\n");
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		return -ENODEV;
	}

	if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
		no_funcs = mfc.nfn;
	else
		no_funcs = 1;
747
	s->functions = no_funcs;
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748 749

	for (i=0; i < no_funcs; i++)
750
		pcmcia_device_add(s, i);
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751 752 753 754 755

	return (ret);
}


756
static void pcmcia_delayed_add_device(struct work_struct *work)
757
{
758 759
	struct pcmcia_socket *s =
		container_of(work, struct pcmcia_socket, device_add);
760
	ds_dev_dbg(1, &s->dev, "adding additional device to %d\n", s->sock);
761
	pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
762
	s->pcmcia_state.device_add_pending = 0;
763
	s->pcmcia_state.mfc_pfc = 0;
764 765
}

766
static int pcmcia_requery(struct device *dev, void * _data)
767
{
768
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
769
	if (!p_dev->dev.driver) {
770
		ds_dev_dbg(1, dev, "update device information\n");
771
		pcmcia_device_query(p_dev);
772
	}
773 774 775 776

	return 0;
}

777
static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
778
{
779
	int no_devices = 0;
780
	int ret = 0;
781 782
	unsigned long flags;

783
	/* must be called with skt_mutex held */
784
	ds_dev_dbg(0, &skt->dev, "re-scanning socket %d\n", skt->sock);
785

786
	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
787
	if (list_empty(&skt->devices_list))
788
		no_devices = 1;
789 790
	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);

791 792 793 794
	/* If this is because of a CIS override, start over */
	if (new_cis && !no_devices)
		pcmcia_card_remove(skt, NULL);

795 796 797
	/* if no devices were added for this socket yet because of
	 * missing resource information or other trouble, we need to
	 * do this now. */
798
	if (no_devices || new_cis) {
799
		ret = pcmcia_card_add(skt);
800 801 802 803 804 805 806 807 808 809 810
		if (ret)
			return;
	}

	/* some device information might have changed because of a CIS
	 * update or because we can finally read it correctly... so
	 * determine it again, overwriting old values if necessary. */
	bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);

	/* we re-scan all devices, not just the ones connected to this
	 * socket. This does not matter, though. */
811 812 813
	ret = bus_rescan_devices(&pcmcia_bus_type);
	if (ret)
		printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
814
}
815

816 817 818 819
#ifdef CONFIG_PCMCIA_LOAD_CIS

/**
 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
820 821
 * @dev: the pcmcia device which needs a CIS override
 * @filename: requested filename in /lib/firmware/
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838
 *
 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 * the one provided by the card is broken. The firmware files reside in
 * /lib/firmware/ in userspace.
 */
static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
{
	struct pcmcia_socket *s = dev->socket;
	const struct firmware *fw;
	int ret = -ENOMEM;
	int no_funcs;
	int old_funcs;
	cistpl_longlink_mfc_t mfc;

	if (!filename)
		return -EINVAL;

839
	ds_dev_dbg(1, &dev->dev, "trying to load CIS file %s\n", filename);
840

841
	if (request_firmware(&fw, filename, &dev->dev) == 0) {
842 843
		if (fw->size >= CISTPL_MAX_CIS_SIZE) {
			ret = -EINVAL;
844 845
			dev_printk(KERN_ERR, &dev->dev,
				   "pcmcia: CIS override is too big\n");
846
			goto release;
847
		}
848

849
		if (!pcmcia_replace_cis(s, fw->data, fw->size))
850
			ret = 0;
851
		else {
852 853
			dev_printk(KERN_ERR, &dev->dev,
				   "pcmcia: CIS override failed\n");
854 855 856
			goto release;
		}

857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890

		/* update information */
		pcmcia_device_query(dev);

		/* does this cis override add or remove functions? */
		old_funcs = s->functions;

		if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
			no_funcs = mfc.nfn;
		else
			no_funcs = 1;
		s->functions = no_funcs;

		if (old_funcs > no_funcs)
			pcmcia_card_remove(s, dev);
		else if (no_funcs > old_funcs)
			pcmcia_add_device_later(s, 1);
	}
 release:
	release_firmware(fw);

	return (ret);
}

#else /* !CONFIG_PCMCIA_LOAD_CIS */

static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
{
	return -ENODEV;
}

#endif


891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956
static inline int pcmcia_devmatch(struct pcmcia_device *dev,
				  struct pcmcia_device_id *did)
{
	if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
		if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
		if ((!dev->has_card_id) || (dev->card_id != did->card_id))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
		if (dev->func != did->function)
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
		if (!dev->prod_id[0])
			return 0;
		if (strcmp(did->prod_id[0], dev->prod_id[0]))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
		if (!dev->prod_id[1])
			return 0;
		if (strcmp(did->prod_id[1], dev->prod_id[1]))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
		if (!dev->prod_id[2])
			return 0;
		if (strcmp(did->prod_id[2], dev->prod_id[2]))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
		if (!dev->prod_id[3])
			return 0;
		if (strcmp(did->prod_id[3], dev->prod_id[3]))
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
		if (dev->device_no != did->device_no)
			return 0;
	}

	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
		if ((!dev->has_func_id) || (dev->func_id != did->func_id))
			return 0;

		/* if this is a pseudo-multi-function device,
		 * we need explicit matches */
		if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
			return 0;
		if (dev->device_no)
			return 0;

		/* also, FUNC_ID matching needs to be activated by userspace
		 * after it has re-checked that there is no possible module
		 * with a prod_id/manf_id/card_id match.
		 */
957 958
		ds_dev_dbg(0, &dev->dev,
			"skipping FUNC_ID match until userspace interaction\n");
959 960 961 962
		if (!dev->allow_func_id_match)
			return 0;
	}

963
	if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
964
		ds_dev_dbg(0, &dev->dev, "device needs a fake CIS\n");
965 966 967 968
		if (!dev->socket->fake_cis)
			pcmcia_load_firmware(dev, did->cisfile);

		if (!dev->socket->fake_cis)
969 970 971
			return 0;
	}

972 973 974 975 976 977 978 979 980
	if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
		int i;
		for (i=0; i<4; i++)
			if (dev->prod_id[i])
				return 0;
		if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
			return 0;
	}

981 982 983 984 985 986
	dev->dev.driver_data = (void *) did;

	return 1;
}


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static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
	struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
	struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
990
	struct pcmcia_device_id *did = p_drv->id_table;
991 992 993 994 995
	struct pcmcia_dynid *dynid;

	/* match dynamic devices first */
	spin_lock(&p_drv->dynids.lock);
	list_for_each_entry(dynid, &p_drv->dynids.list, node) {
996
		ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
997
		if (pcmcia_devmatch(p_dev, &dynid->id)) {
998
			ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
999 1000 1001 1002 1003
			spin_unlock(&p_drv->dynids.lock);
			return 1;
		}
	}
	spin_unlock(&p_drv->dynids.lock);
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1004

1005
#ifdef CONFIG_PCMCIA_IOCTL
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1006
	/* matching by cardmgr */
1007
	if (p_dev->cardmgr == p_drv) {
1008
		ds_dev_dbg(0, dev, "cardmgr matched to %s\n", drv->name);
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1009
		return 1;
1010
	}
1011
#endif
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1012

1013
	while (did && did->match_flags) {
1014
		ds_dev_dbg(3, dev, "trying to match to %s\n", drv->name);
1015
		if (pcmcia_devmatch(p_dev, did)) {
1016
			ds_dev_dbg(0, dev, "matched to %s\n", drv->name);
1017
			return 1;
1018
		}
1019 1020 1021
		did++;
	}

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1022 1023 1024
	return 0;
}

1025 1026
#ifdef CONFIG_HOTPLUG

1027
static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1028 1029
{
	struct pcmcia_device *p_dev;
1030
	int i;
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
	u32 hash[4] = { 0, 0, 0, 0};

	if (!dev)
		return -ENODEV;

	p_dev = to_pcmcia_dev(dev);

	/* calculate hashes */
	for (i=0; i<4; i++) {
		if (!p_dev->prod_id[i])
			continue;
		hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
	}

1045
	if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1046 1047
		return -ENOMEM;

1048
	if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1049 1050
		return -ENOMEM;

1051
	if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
			   "pa%08Xpb%08Xpc%08Xpd%08X",
			   p_dev->has_manf_id ? p_dev->manf_id : 0,
			   p_dev->has_card_id ? p_dev->card_id : 0,
			   p_dev->has_func_id ? p_dev->func_id : 0,
			   p_dev->func,
			   p_dev->device_no,
			   hash[0],
			   hash[1],
			   hash[2],
			   hash[3]))
1062 1063 1064 1065 1066 1067 1068
		return -ENOMEM;

	return 0;
}

#else

1069
static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1070 1071 1072 1073 1074 1075
{
	return -ENODEV;
}

#endif

1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
/************************ runtime PM support ***************************/

static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
static int pcmcia_dev_resume(struct device *dev);

static int runtime_suspend(struct device *dev)
{
	int rc;

	down(&dev->sem);
	rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
	up(&dev->sem);
	return rc;
}

static void runtime_resume(struct device *dev)
{
	int rc;

	down(&dev->sem);
	rc = pcmcia_dev_resume(dev);
	up(&dev->sem);
}

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1100 1101 1102
/************************ per-device sysfs output ***************************/

#define pcmcia_device_attr(field, test, format)				\
1103
static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)		\
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1104 1105 1106 1107 1108 1109
{									\
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);		\
	return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
}

#define pcmcia_device_stringattr(name, field)					\
1110
static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)		\
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1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
{									\
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);		\
	return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
}

pcmcia_device_attr(func, socket, "0x%02x\n");
pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
pcmcia_device_stringattr(prod_id1, prod_id[0]);
pcmcia_device_stringattr(prod_id2, prod_id[1]);
pcmcia_device_stringattr(prod_id3, prod_id[2]);
pcmcia_device_stringattr(prod_id4, prod_id[3]);

1125 1126 1127 1128 1129

static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);

1130
	if (p_dev->suspended)
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
		return sprintf(buf, "off\n");
	else
		return sprintf(buf, "on\n");
}

static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
				     const char *buf, size_t count)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
	int ret = 0;

        if (!count)
                return -EINVAL;

1145
	if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1146
		ret = runtime_suspend(dev);
1147
	else if (p_dev->suspended && !strncmp(buf, "on", 2))
1148
		runtime_resume(dev);
1149 1150 1151 1152 1153

	return ret ? ret : count;
}


1154
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
	int i;
	u32 hash[4] = { 0, 0, 0, 0};

	/* calculate hashes */
	for (i=0; i<4; i++) {
		if (!p_dev->prod_id[i])
			continue;
		hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
	}
	return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
				"pa%08Xpb%08Xpc%08Xpd%08X\n",
				p_dev->has_manf_id ? p_dev->manf_id : 0,
				p_dev->has_card_id ? p_dev->card_id : 0,
				p_dev->has_func_id ? p_dev->func_id : 0,
				p_dev->func, p_dev->device_no,
				hash[0], hash[1], hash[2], hash[3]);
}
1174

1175 1176
static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
1177 1178
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1179
	int ret;
1180 1181 1182

	if (!count)
		return -EINVAL;
1183

1184
	mutex_lock(&p_dev->socket->skt_mutex);
1185
	p_dev->allow_func_id_match = 1;
1186
	mutex_unlock(&p_dev->socket->skt_mutex);
1187

1188 1189 1190 1191
	ret = bus_rescan_devices(&pcmcia_bus_type);
	if (ret)
		printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
		       "allowing func_id matches\n");
1192 1193 1194 1195

	return count;
}

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static struct device_attribute pcmcia_dev_attrs[] = {
	__ATTR(function, 0444, func_show, NULL),
1198
	__ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
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	__ATTR_RO(func_id),
	__ATTR_RO(manf_id),
	__ATTR_RO(card_id),
	__ATTR_RO(prod_id1),
	__ATTR_RO(prod_id2),
	__ATTR_RO(prod_id3),
	__ATTR_RO(prod_id4),
1206
	__ATTR_RO(modalias),
1207
	__ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
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	__ATTR_NULL,
};

1211 1212 1213 1214 1215 1216
/* PM support, also needed for reset */

static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
	struct pcmcia_driver *p_drv = NULL;
1217
	int ret = 0;
1218

1219 1220 1221
	if (p_dev->suspended)
		return 0;

1222
	ds_dev_dbg(2, dev, "suspending\n");
1223

1224 1225 1226
	if (dev->driver)
		p_drv = to_pcmcia_drv(dev->driver);

1227 1228 1229 1230
	if (!p_drv)
		goto out;

	if (p_drv->suspend) {
1231
		ret = p_drv->suspend(p_dev);
1232
		if (ret) {
1233 1234 1235 1236
			dev_printk(KERN_ERR, dev,
				   "pcmcia: device %s (driver %s) did "
				   "not want to go to sleep (%d)\n",
				   p_dev->devname, p_drv->drv.name, ret);
1237
			goto out;
1238
		}
1239
	}
1240

1241
	if (p_dev->device_no == p_dev->func) {
1242
		ds_dev_dbg(2, dev, "releasing configuration\n");
1243
		pcmcia_release_configuration(p_dev);
1244
	}
1245

1246 1247 1248 1249
 out:
	if (!ret)
		p_dev->suspended = 1;
	return ret;
1250 1251 1252 1253 1254 1255 1256
}


static int pcmcia_dev_resume(struct device * dev)
{
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
        struct pcmcia_driver *p_drv = NULL;
1257
	int ret = 0;
1258

1259 1260 1261
	if (!p_dev->suspended)
		return 0;

1262
	ds_dev_dbg(2, dev, "resuming\n");
1263

1264 1265 1266
	if (dev->driver)
		p_drv = to_pcmcia_drv(dev->driver);

1267 1268 1269 1270
	if (!p_drv)
		goto out;

	if (p_dev->device_no == p_dev->func) {
1271
		ds_dev_dbg(2, dev, "requesting configuration\n");
1272 1273 1274
		ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
		if (ret)
			goto out;
1275
	}
1276

1277 1278 1279
	if (p_drv->resume)
		ret = p_drv->resume(p_dev);

1280 1281 1282 1283
 out:
	if (!ret)
		p_dev->suspended = 0;
	return ret;
1284 1285 1286 1287 1288 1289 1290 1291
}


static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
{
	struct pcmcia_socket *skt = _data;
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);

1292
	if (p_dev->socket != skt || p_dev->suspended)
1293 1294
		return 0;

1295
	return runtime_suspend(dev);
1296 1297 1298 1299 1300 1301 1302
}

static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
{
	struct pcmcia_socket *skt = _data;
	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);

1303
	if (p_dev->socket != skt || !p_dev->suspended)
1304 1305
		return 0;

1306
	runtime_resume(dev);
1307 1308 1309 1310 1311 1312

	return 0;
}

static int pcmcia_bus_resume(struct pcmcia_socket *skt)
{
1313
	ds_dev_dbg(2, &skt->dev, "resuming socket %d\n", skt->sock);
1314 1315 1316 1317 1318 1319
	bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
	return 0;
}

static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
{
1320
	ds_dev_dbg(2, &skt->dev, "suspending socket %d\n", skt->sock);
1321 1322 1323 1324 1325 1326 1327 1328
	if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
			     pcmcia_bus_suspend_callback)) {
		pcmcia_bus_resume(skt);
		return -EIO;
	}
	return 0;
}

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

    The card status event handler.
    
======================================================================*/

/* Normally, the event is passed to individual drivers after
 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
 * is inversed to maintain historic compatibility.
 */

static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
{
1343
	struct pcmcia_socket *s = pcmcia_get_socket(skt);
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1344

1345
	if (!s) {
1346 1347 1348
		dev_printk(KERN_ERR, &skt->dev,
			   "PCMCIA obtaining reference to socket "	\
			   "failed, event 0x%x lost!\n", event);
1349 1350 1351
		return -ENODEV;
	}

1352 1353
	ds_dev_dbg(1, &skt->dev, "ds_event(0x%06x, %d, 0x%p)\n",
		   event, priority, skt);
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1355
	switch (event) {
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	case CS_EVENT_CARD_REMOVAL:
1357
		s->pcmcia_state.present = 0;
1358
		pcmcia_card_remove(skt, NULL);
1359
		handle_event(skt, event);
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		break;
1361

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1362
	case CS_EVENT_CARD_INSERTION:
1363
		s->pcmcia_state.present = 1;
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		pcmcia_card_add(skt);
1365
		handle_event(skt, event);
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		break;

	case CS_EVENT_EJECTION_REQUEST:
		break;

1371 1372 1373 1374
	case CS_EVENT_PM_SUSPEND:
	case CS_EVENT_PM_RESUME:
	case CS_EVENT_RESET_PHYSICAL:
	case CS_EVENT_CARD_RESET:
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1375
	default:
1376
		handle_event(skt, event);
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		break;
    }

1380 1381
    pcmcia_put_socket(s);

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    return 0;
} /* ds_event */


1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411
struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
{
	struct pcmcia_device *p_dev;
	struct pcmcia_device *ret = NULL;

	p_dev = pcmcia_get_dev(_p_dev);
	if (!p_dev)
		return NULL;

	if (!p_dev->socket->pcmcia_state.present)
		goto out;

	if (p_dev->_removed)
		goto out;

	if (p_dev->suspended)
		goto out;

	ret = p_dev;
 out:
	pcmcia_put_dev(p_dev);
	return ret;
}
EXPORT_SYMBOL(pcmcia_dev_present);


1412 1413 1414 1415
static struct pcmcia_callback pcmcia_bus_callback = {
	.owner = THIS_MODULE,
	.event = ds_event,
	.requery = pcmcia_bus_rescan,
1416 1417
	.suspend = pcmcia_bus_suspend,
	.resume = pcmcia_bus_resume,
1418 1419
};

1420
static int __devinit pcmcia_bus_add_socket(struct device *dev,
1421
					   struct class_interface *class_intf)
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{
1423
	struct pcmcia_socket *socket = dev_get_drvdata(dev);
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1424 1425
	int ret;

1426 1427
	socket = pcmcia_get_socket(socket);
	if (!socket) {
1428 1429
		dev_printk(KERN_ERR, dev,
			   "PCMCIA obtaining reference to socket failed\n");
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		return -ENODEV;
	}

	/*
	 * Ugly. But we want to wait for the socket threads to have started up.
	 * We really should let the drivers themselves drive some of this..
	 */
	msleep(250);

1439
#ifdef CONFIG_PCMCIA_IOCTL
1440
	init_waitqueue_head(&socket->queue);
1441
#endif
1442
	INIT_LIST_HEAD(&socket->devices_list);
1443
	INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1444 1445
	memset(&socket->pcmcia_state, 0, sizeof(u8));
	socket->device_count = 0;
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1446

1447
	ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
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1448
	if (ret) {
1449
		dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
1450
		pcmcia_put_socket(socket);
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		return (ret);
	}

	return 0;
}

1457
static void pcmcia_bus_remove_socket(struct device *dev,
1458
				     struct class_interface *class_intf)
L
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1459
{
1460
	struct pcmcia_socket *socket = dev_get_drvdata(dev);
L
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1461

1462
	if (!socket)
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1463 1464
		return;

1465
	socket->pcmcia_state.dead = 1;
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1466 1467
	pccard_register_pcmcia(socket, NULL);

1468
	/* unregister any unbound devices */
1469
	mutex_lock(&socket->skt_mutex);
1470
	pcmcia_card_remove(socket, NULL);
1471
	mutex_unlock(&socket->skt_mutex);
1472

1473
	pcmcia_put_socket(socket);
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	return;
}


/* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1480
static struct class_interface pcmcia_bus_interface __refdata = {
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1481
	.class = &pcmcia_socket_class,
1482 1483
	.add_dev = &pcmcia_bus_add_socket,
	.remove_dev = &pcmcia_bus_remove_socket,
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1484 1485 1486
};


1487
struct bus_type pcmcia_bus_type = {
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1488
	.name = "pcmcia",
1489
	.uevent = pcmcia_bus_uevent,
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1490 1491
	.match = pcmcia_bus_match,
	.dev_attrs = pcmcia_dev_attrs,
1492 1493
	.probe = pcmcia_device_probe,
	.remove = pcmcia_device_remove,
1494 1495
	.suspend = pcmcia_dev_suspend,
	.resume = pcmcia_dev_resume,
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};


static int __init init_pcmcia_bus(void)
{
1501 1502
	int ret;

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1503 1504
	spin_lock_init(&pcmcia_dev_list_lock);

1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516
	ret = bus_register(&pcmcia_bus_type);
	if (ret < 0) {
		printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
		return ret;
	}
	ret = class_interface_register(&pcmcia_bus_interface);
	if (ret < 0) {
		printk(KERN_WARNING
			"pcmcia: class_interface_register error: %d\n", ret);
		bus_unregister(&pcmcia_bus_type);
		return ret;
	}
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1517

1518
	pcmcia_setup_ioctl();
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	return 0;
}
fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that 
			       * pcmcia_socket_class is already registered */


static void __exit exit_pcmcia_bus(void)
{
1528
	pcmcia_cleanup_ioctl();
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1529

1530
	class_interface_unregister(&pcmcia_bus_interface);
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1531 1532 1533 1534 1535 1536 1537

	bus_unregister(&pcmcia_bus_type);
}
module_exit(exit_pcmcia_bus);


MODULE_ALIAS("ds");
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