/linux-2.6.21.x/drivers/pcmcia/cs.c
C | 961 lines | 656 code | 193 blank | 112 comment | 106 complexity | 62ff8ffaff324617b35359f7ecd32e17 MD5 | raw file
Possible License(s): CC-BY-SA-3.0, BSD-3-Clause, MPL-2.0-no-copyleft-exception, GPL-2.0, GPL-3.0, LGPL-3.0, 0BSD, AGPL-1.0, LGPL-2.1, LGPL-2.0
- /*
- * 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/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 <linux/kthread.h>
- #include <linux/freezer.h>
- #include <asm/system.h>
- #include <asm/irq.h>
- #define IN_CARD_SERVICES
- #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"
- /* Module parameters */
- MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
- MODULE_DESCRIPTION("Linux Kernel Card Services");
- 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 */
- #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,
- };
- EXPORT_SYMBOL(dead_socket);
- /* List of all sockets, protected by a rwsem */
- LIST_HEAD(pcmcia_socket_list);
- EXPORT_SYMBOL(pcmcia_socket_list);
- DECLARE_RWSEM(pcmcia_socket_list_rwsem);
- EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
- /**
- * Low-level PCMCIA socket drivers need to register with the PCCard
- * core using pcmcia_register_socket.
- *
- * 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.parent != dev)
- continue;
- mutex_lock(&socket->skt_mutex);
- socket_suspend(socket);
- mutex_unlock(&socket->skt_mutex);
- }
- 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.parent != dev)
- continue;
- mutex_lock(&socket->skt_mutex);
- socket_resume(socket);
- mutex_unlock(&socket->skt_mutex);
- }
- 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 device *dev = get_device(&skt->dev);
- if (!dev)
- return NULL;
- skt = dev_get_drvdata(dev);
- if (!try_module_get(skt->owner)) {
- put_device(&skt->dev);
- return NULL;
- }
- return (skt);
- }
- EXPORT_SYMBOL(pcmcia_get_socket);
- void pcmcia_put_socket(struct pcmcia_socket *skt)
- {
- module_put(skt->owner);
- put_device(&skt->dev);
- }
- EXPORT_SYMBOL(pcmcia_put_socket);
- static void pcmcia_release_socket(struct device *dev)
- {
- struct pcmcia_socket *socket = dev_get_drvdata(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)
- {
- struct task_struct *tsk;
- int ret;
- if (!socket || !socket->ops || !socket->dev.parent || !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);
- #ifndef CONFIG_CARDBUS
- /*
- * If we do not support Cardbus, ensure that
- * the Cardbus socket capability is disabled.
- */
- socket->features &= ~SS_CAP_CARDBUS;
- #endif
- /* set proper values in socket->dev */
- dev_set_drvdata(&socket->dev, socket);
- socket->dev.class = &pcmcia_socket_class;
- snprintf(socket->dev.bus_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);
- mutex_init(&socket->skt_mutex);
- spin_lock_init(&socket->thread_lock);
- tsk = kthread_run(pccardd, socket, "pccardd");
- if (IS_ERR(tsk)) {
- ret = PTR_ERR(tsk);
- 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) {
- wake_up(&socket->thread_wait);
- kthread_stop(socket->thread);
- }
- 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);
- /**
- * 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 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;
- }
- /**
- * socket_setup() and socket_shutdown() 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.
- * socket_shutdown() unconfigures a socket and turns off socket power.
- */
- static void socket_shutdown(struct pcmcia_socket *s)
- {
- int status;
- cs_dbg(s, 4, "shutdown\n");
- socket_remove_drivers(s);
- s->state &= SOCKET_INUSE | SOCKET_PRESENT;
- msleep(shutdown_delay * 10);
- s->state &= SOCKET_INUSE;
- /* 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;
- s->ops->get_status(s, &status);
- if (status & SS_POWERON) {
- printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s);
- }
- cs_socket_put(s);
- }
- 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) {
- if (!(skt->features & SS_CAP_CARDBUS)) {
- cs_err(skt, "cardbus cards are not supported.\n");
- return CS_BAD_TYPE;
- }
- skt->state |= SOCKET_CARDBUS;
- }
- /*
- * 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;
- }
- if (skt->power_hook)
- skt->power_hook(skt, HOOK_POWER_PRE);
- 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;
- }
- status = socket_reset(skt);
- if (skt->power_hook)
- skt->power_hook(skt, HOOK_POWER_POST);
- return status;
- }
- /*
- * 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;
- printk(KERN_NOTICE "pccard: %s card inserted into slot %d\n",
- (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA",
- skt->sock);
- #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);
- }
- 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);
- }
- skt->state &= ~SOCKET_SUSPEND;
- return CS_SUCCESS;
- }
- static void socket_remove(struct pcmcia_socket *skt)
- {
- printk(KERN_NOTICE "pccard: card ejected from slot %d\n", skt->sock);
- socket_shutdown(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;
- skt->thread = current;
- skt->socket = dead_socket;
- skt->ops->init(skt);
- skt->ops->set_socket(skt, &skt->socket);
- /* register with the device core */
- ret = device_register(&skt->dev);
- if (ret) {
- printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n",
- skt);
- skt->thread = NULL;
- complete(&skt->thread_done);
- return 0;
- }
- add_wait_queue(&skt->thread_wait, &wait);
- complete(&skt->thread_done);
- 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) {
- mutex_lock(&skt->skt_mutex);
- 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);
- mutex_unlock(&skt->skt_mutex);
- continue;
- }
- if (kthread_should_stop())
- break;
- schedule();
- try_to_freeze();
- }
- /* make sure we are running before we exit */
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&skt->thread_wait, &wait);
- /* remove from the device core */
- device_unregister(&skt->dev);
- return 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)
- {
- unsigned long flags;
- cs_dbg(s, 4, "parse_events: events %08x\n", events);
- if (s->thread) {
- spin_lock_irqsave(&s->thread_lock, flags);
- s->thread_events |= events;
- spin_unlock_irqrestore(&s->thread_lock, flags);
- wake_up(&s->thread_wait);
- }
- } /* pcmcia_parse_events */
- EXPORT_SYMBOL(pcmcia_parse_events);
- /* register pcmcia_callback */
- int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
- {
- int ret = 0;
- /* s->skt_mutex also protects s->callback */
- mutex_lock(&s->skt_mutex);
- 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:
- mutex_unlock(&s->skt_mutex);
- return ret;
- }
- EXPORT_SYMBOL(pccard_register_pcmcia);
- /* 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");
- mutex_lock(&skt->skt_mutex);
- 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 (skt->callback)
- skt->callback->suspend(skt);
- if (socket_reset(skt) == CS_SUCCESS) {
- send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
- if (skt->callback)
- skt->callback->resume(skt);
- }
- }
- ret = CS_SUCCESS;
- } while (0);
- mutex_unlock(&skt->skt_mutex);
- 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");
- mutex_lock(&skt->skt_mutex);
- do {
- if (!(skt->state & SOCKET_PRESENT)) {
- ret = CS_NO_CARD;
- break;
- }
- if (skt->state & SOCKET_CARDBUS) {
- ret = CS_UNSUPPORTED_FUNCTION;
- break;
- }
- if (skt->callback) {
- ret = skt->callback->suspend(skt);
- if (ret)
- break;
- }
- ret = socket_suspend(skt);
- } while (0);
- mutex_unlock(&skt->skt_mutex);
- return ret;
- } /* suspend_card */
- EXPORT_SYMBOL(pcmcia_suspend_card);
- int pcmcia_resume_card(struct pcmcia_socket *skt)
- {
- int ret;
-
- cs_dbg(skt, 1, "waking up socket\n");
- mutex_lock(&skt->skt_mutex);
- 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);
- if (!ret && skt->callback)
- skt->callback->resume(skt);
- } while (0);
- mutex_unlock(&skt->skt_mutex);
- return ret;
- } /* resume_card */
- EXPORT_SYMBOL(pcmcia_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");
- mutex_lock(&skt->skt_mutex);
- 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);
- mutex_unlock(&skt->skt_mutex);
- return ret;
- } /* eject_card */
- EXPORT_SYMBOL(pcmcia_eject_card);
- int pcmcia_insert_card(struct pcmcia_socket *skt)
- {
- int ret;
- cs_dbg(skt, 1, "user insert request\n");
- mutex_lock(&skt->skt_mutex);
- do {
- if (skt->state & SOCKET_PRESENT) {
- ret = -EBUSY;
- break;
- }
- if (socket_insert(skt) == CS_NO_CARD) {
- ret = -ENODEV;
- break;
- }
- ret = 0;
- } while (0);
- mutex_unlock(&skt->skt_mutex);
- return ret;
- } /* insert_card */
- EXPORT_SYMBOL(pcmcia_insert_card);
- static int pcmcia_socket_uevent(struct device *dev, char **envp,
- int num_envp, char *buffer, int buffer_size)
- {
- struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
- int i = 0, length = 0;
- if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size,
- &length, "SOCKET_NO=%u", s->sock))
- return -ENOMEM;
- envp[i] = NULL;
- return 0;
- }
- static struct completion pcmcia_unload;
- static void pcmcia_release_socket_class(struct class *data)
- {
- complete(&pcmcia_unload);
- }
- struct class pcmcia_socket_class = {
- .name = "pcmcia_socket",
- .dev_uevent = pcmcia_socket_uevent,
- .dev_release = pcmcia_release_socket,
- .class_release = pcmcia_release_socket_class,
- };
- EXPORT_SYMBOL(pcmcia_socket_class);
- static int __init init_pcmcia_cs(void)
- {
- int ret;
- init_completion(&pcmcia_unload);
- ret = class_register(&pcmcia_socket_class);
- if (ret)
- return (ret);
- return class_interface_register(&pccard_sysfs_interface);
- }
- static void __exit exit_pcmcia_cs(void)
- {
- class_interface_unregister(&pccard_sysfs_interface);
- class_unregister(&pcmcia_socket_class);
- wait_for_completion(&pcmcia_unload);
- }
- subsys_initcall(init_pcmcia_cs);
- module_exit(exit_pcmcia_cs);