From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/pcmcia/cs.c | 922 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 922 insertions(+) create mode 100644 drivers/pcmcia/cs.c (limited to 'drivers/pcmcia/cs.c') diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c new file mode 100644 index 000000000..5292db69c --- /dev/null +++ b/drivers/pcmcia/cs.c @@ -0,0 +1,922 @@ +/* + * 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 + * . Portions created by David A. Hinds + * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. + * + * (C) 1999 David A. Hinds + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include "cs_internal.h" + + +/* Module parameters */ + +MODULE_AUTHOR("David Hinds "); +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 */ + + +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); + + +struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) +{ + struct device *dev = get_device(&skt->dev); + if (!dev) + return NULL; + return dev_get_drvdata(dev); +} +EXPORT_SYMBOL(pcmcia_get_socket); + + +void pcmcia_put_socket(struct pcmcia_socket *skt) +{ + 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 + * @socket: the &socket to register + */ +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; + + dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); + + /* 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; + dev_set_name(&socket->dev, "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); + mutex_init(&socket->skt_mutex); + mutex_init(&socket->ops_mutex); + spin_lock_init(&socket->thread_lock); + + if (socket->resource_ops->init) { + mutex_lock(&socket->ops_mutex); + ret = socket->resource_ops->init(socket); + mutex_unlock(&socket->ops_mutex); + if (ret) + goto err; + } + + 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) { + dev_printk(KERN_WARNING, &socket->dev, + "PCMCIA: warning: socket thread did not start\n"); + return -EIO; + } + + pcmcia_parse_events(socket, SS_DETECT); + + /* + * Let's try to get the PCMCIA module for 16-bit PCMCIA support. + * If it fails, it doesn't matter -- we still have 32-bit CardBus + * support to offer, so this is not a failure mode. + */ + request_module_nowait("pcmcia"); + + 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 + * @socket: the &socket to unregister + */ +void pcmcia_unregister_socket(struct pcmcia_socket *socket) +{ + if (!socket) + return; + + dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); + + if (socket->thread) + kthread_stop(socket->thread); + + /* 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 */ + if (socket->resource_ops->exit) { + mutex_lock(&socket->ops_mutex); + socket->resource_ops->exit(socket); + mutex_unlock(&socket->ops_mutex); + } + 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); + +static int socket_reset(struct pcmcia_socket *skt) +{ + int status, i; + + dev_dbg(&skt->dev, "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 -ENODEV; + + if (status & SS_READY) + return 0; + + msleep(unreset_check * 10); + } + + dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); + return -ETIMEDOUT; +} + +/* + * 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; + + dev_dbg(&s->dev, "shutdown\n"); + + if (s->callback) + s->callback->remove(s); + + mutex_lock(&s->ops_mutex); + 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->lock_count = 0; + kfree(s->fake_cis); + s->fake_cis = NULL; + s->functions = 0; + + /* From here on we can be sure that only we (that is, the + * pccardd thread) accesses this socket, and all (16-bit) + * PCMCIA interactions are gone. Therefore, release + * ops_mutex so that we don't get a sysfs-related lockdep + * warning. + */ + mutex_unlock(&s->ops_mutex); + +#ifdef CONFIG_CARDBUS + cb_free(s); +#endif + + /* give socket some time to power down */ + msleep(100); + + s->ops->get_status(s, &status); + if (status & SS_POWERON) { + dev_printk(KERN_ERR, &s->dev, + "*** DANGER *** unable to remove socket power\n"); + } + + s->state &= ~SOCKET_INUSE; +} + +static int socket_setup(struct pcmcia_socket *skt, int initial_delay) +{ + int status, i; + + dev_dbg(&skt->dev, "setup\n"); + + skt->ops->get_status(skt, &status); + if (!(status & SS_DETECT)) + return -ENODEV; + + msleep(initial_delay * 10); + + for (i = 0; i < 100; i++) { + skt->ops->get_status(skt, &status); + if (!(status & SS_DETECT)) + return -ENODEV; + + if (!(status & SS_PENDING)) + break; + + msleep(100); + } + + if (status & SS_PENDING) { + dev_printk(KERN_ERR, &skt->dev, + "voltage interrogation timed out.\n"); + return -ETIMEDOUT; + } + + if (status & SS_CARDBUS) { + if (!(skt->features & SS_CAP_CARDBUS)) { + dev_printk(KERN_ERR, &skt->dev, + "cardbus cards are not supported.\n"); + return -EINVAL; + } + skt->state |= SOCKET_CARDBUS; + } else + 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 { + dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); + return -EIO; + } + + 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)) { + dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); + return -EIO; + } + + 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; + + dev_dbg(&skt->dev, "insert\n"); + + mutex_lock(&skt->ops_mutex); + if (skt->state & SOCKET_INUSE) { + mutex_unlock(&skt->ops_mutex); + return -EINVAL; + } + skt->state |= SOCKET_INUSE; + + ret = socket_setup(skt, setup_delay); + if (ret == 0) { + skt->state |= SOCKET_PRESENT; + + dev_printk(KERN_NOTICE, &skt->dev, + "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 + dev_dbg(&skt->dev, "insert done\n"); + mutex_unlock(&skt->ops_mutex); + + if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) + skt->callback->add(skt); + } else { + mutex_unlock(&skt->ops_mutex); + socket_shutdown(skt); + } + + return ret; +} + +static int socket_suspend(struct pcmcia_socket *skt) +{ + if (skt->state & SOCKET_SUSPEND) + return -EBUSY; + + mutex_lock(&skt->ops_mutex); + skt->suspended_state = skt->state; + + skt->socket = dead_socket; + skt->ops->set_socket(skt, &skt->socket); + if (skt->ops->suspend) + skt->ops->suspend(skt); + skt->state |= SOCKET_SUSPEND; + mutex_unlock(&skt->ops_mutex); + return 0; +} + +static int socket_early_resume(struct pcmcia_socket *skt) +{ + mutex_lock(&skt->ops_mutex); + skt->socket = dead_socket; + skt->ops->init(skt); + skt->ops->set_socket(skt, &skt->socket); + if (skt->state & SOCKET_PRESENT) + skt->resume_status = socket_setup(skt, resume_delay); + mutex_unlock(&skt->ops_mutex); + return 0; +} + +static int socket_late_resume(struct pcmcia_socket *skt) +{ + int ret = 0; + + mutex_lock(&skt->ops_mutex); + skt->state &= ~SOCKET_SUSPEND; + mutex_unlock(&skt->ops_mutex); + + if (!(skt->state & SOCKET_PRESENT)) { + ret = socket_insert(skt); + if (ret == -ENODEV) + ret = 0; + return ret; + } + + if (skt->resume_status) { + socket_shutdown(skt); + return 0; + } + + if (skt->suspended_state != skt->state) { + dev_dbg(&skt->dev, + "suspend state 0x%x != resume state 0x%x\n", + skt->suspended_state, skt->state); + + socket_shutdown(skt); + return socket_insert(skt); + } + + if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) + ret = skt->callback->early_resume(skt); + return ret; +} + +/* + * Finalize the resume. In case of a cardbus socket, we have + * to rebind the devices as we can't be certain that it has been + * replaced, or not. + */ +static int socket_complete_resume(struct pcmcia_socket *skt) +{ + int ret = 0; +#ifdef CONFIG_CARDBUS + if (skt->state & SOCKET_CARDBUS) { + /* We can't be sure the CardBus card is the same + * as the one previously inserted. Therefore, remove + * and re-add... */ + cb_free(skt); + ret = cb_alloc(skt); + if (ret) + cb_free(skt); + } +#endif + return ret; +} + +/* + * 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 err; + if (!(skt->state & SOCKET_SUSPEND)) + return -EBUSY; + + socket_early_resume(skt); + err = socket_late_resume(skt); + if (!err) + err = socket_complete_resume(skt); + return err; +} + +static void socket_remove(struct pcmcia_socket *skt) +{ + dev_printk(KERN_NOTICE, &skt->dev, + "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; + 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) { + dev_printk(KERN_WARNING, &skt->dev, + "PCMCIA: unable to register socket\n"); + skt->thread = NULL; + complete(&skt->thread_done); + return 0; + } + ret = pccard_sysfs_add_socket(&skt->dev); + if (ret) + dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); + + complete(&skt->thread_done); + + /* wait for userspace to catch up */ + msleep(250); + + set_freezable(); + for (;;) { + unsigned long flags; + unsigned int events; + unsigned int sysfs_events; + + set_current_state(TASK_INTERRUPTIBLE); + + spin_lock_irqsave(&skt->thread_lock, flags); + events = skt->thread_events; + skt->thread_events = 0; + sysfs_events = skt->sysfs_events; + skt->sysfs_events = 0; + spin_unlock_irqrestore(&skt->thread_lock, flags); + + mutex_lock(&skt->skt_mutex); + if (events & SS_DETECT) + socket_detect_change(skt); + + if (sysfs_events) { + if (sysfs_events & PCMCIA_UEVENT_EJECT) + socket_remove(skt); + if (sysfs_events & PCMCIA_UEVENT_INSERT) + socket_insert(skt); + if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) && + !(skt->state & SOCKET_CARDBUS)) { + if (skt->callback) + ret = skt->callback->suspend(skt); + else + ret = 0; + if (!ret) { + socket_suspend(skt); + msleep(100); + } + } + if ((sysfs_events & PCMCIA_UEVENT_RESUME) && + !(skt->state & SOCKET_CARDBUS)) { + ret = socket_resume(skt); + if (!ret && skt->callback) + skt->callback->resume(skt); + } + if ((sysfs_events & PCMCIA_UEVENT_REQUERY) && + !(skt->state & SOCKET_CARDBUS)) { + if (!ret && skt->callback) + skt->callback->requery(skt); + } + } + mutex_unlock(&skt->skt_mutex); + + if (events || sysfs_events) + continue; + + if (kthread_should_stop()) + break; + + schedule(); + try_to_freeze(); + } + /* make sure we are running before we exit */ + set_current_state(TASK_RUNNING); + + /* shut down socket, if a device is still present */ + if (skt->state & SOCKET_PRESENT) { + mutex_lock(&skt->skt_mutex); + socket_remove(skt); + mutex_unlock(&skt->skt_mutex); + } + + /* remove from the device core */ + pccard_sysfs_remove_socket(&skt->dev); + 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; + dev_dbg(&s->dev, "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_process(s->thread); + } +} /* pcmcia_parse_events */ +EXPORT_SYMBOL(pcmcia_parse_events); + +/** + * pcmcia_parse_uevents() - tell pccardd to issue manual commands + * @s: the PCMCIA socket we wan't to command + * @events: events to pass to pccardd + * + * userspace-issued insert, eject, suspend and resume commands must be + * handled by pccardd to avoid any sysfs-related deadlocks. Valid events + * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert), + * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend) + * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card). + */ +void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events) +{ + unsigned long flags; + dev_dbg(&s->dev, "parse_uevents: events %08x\n", events); + if (s->thread) { + spin_lock_irqsave(&s->thread_lock, flags); + s->sysfs_events |= events; + spin_unlock_irqrestore(&s->thread_lock, flags); + + wake_up_process(s->thread); + } +} +EXPORT_SYMBOL(pcmcia_parse_uevents); + + +/* 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) + s->callback->add(s); + } 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 pcmcia_reset_card(struct pcmcia_socket *skt) +{ + int ret; + + dev_dbg(&skt->dev, "resetting socket\n"); + + mutex_lock(&skt->skt_mutex); + do { + if (!(skt->state & SOCKET_PRESENT)) { + dev_dbg(&skt->dev, "can't reset, not present\n"); + ret = -ENODEV; + break; + } + if (skt->state & SOCKET_SUSPEND) { + dev_dbg(&skt->dev, "can't reset, suspended\n"); + ret = -EBUSY; + break; + } + if (skt->state & SOCKET_CARDBUS) { + dev_dbg(&skt->dev, "can't reset, is cardbus\n"); + ret = -EPERM; + break; + } + + if (skt->callback) + skt->callback->suspend(skt); + mutex_lock(&skt->ops_mutex); + ret = socket_reset(skt); + mutex_unlock(&skt->ops_mutex); + if ((ret == 0) && (skt->callback)) + skt->callback->resume(skt); + + ret = 0; + } while (0); + mutex_unlock(&skt->skt_mutex); + + return ret; +} /* reset_card */ +EXPORT_SYMBOL(pcmcia_reset_card); + + +static int pcmcia_socket_uevent(struct device *dev, + struct kobj_uevent_env *env) +{ + struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); + + if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) + return -ENOMEM; + + return 0; +} + + +static struct completion pcmcia_unload; + +static void pcmcia_release_socket_class(struct class *data) +{ + complete(&pcmcia_unload); +} + + +#ifdef CONFIG_PM + +static int __pcmcia_pm_op(struct device *dev, + int (*callback) (struct pcmcia_socket *skt)) +{ + struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); + int ret; + + mutex_lock(&s->skt_mutex); + ret = callback(s); + mutex_unlock(&s->skt_mutex); + + return ret; +} + +static int pcmcia_socket_dev_suspend_noirq(struct device *dev) +{ + return __pcmcia_pm_op(dev, socket_suspend); +} + +static int pcmcia_socket_dev_resume_noirq(struct device *dev) +{ + return __pcmcia_pm_op(dev, socket_early_resume); +} + +static int __used pcmcia_socket_dev_resume(struct device *dev) +{ + return __pcmcia_pm_op(dev, socket_late_resume); +} + +static void __used pcmcia_socket_dev_complete(struct device *dev) +{ + WARN(__pcmcia_pm_op(dev, socket_complete_resume), + "failed to complete resume"); +} + +static const struct dev_pm_ops pcmcia_socket_pm_ops = { + /* dev_resume may be called with IRQs enabled */ + SET_SYSTEM_SLEEP_PM_OPS(NULL, + pcmcia_socket_dev_resume) + + /* late suspend must be called with IRQs disabled */ + .suspend_noirq = pcmcia_socket_dev_suspend_noirq, + .freeze_noirq = pcmcia_socket_dev_suspend_noirq, + .poweroff_noirq = pcmcia_socket_dev_suspend_noirq, + + /* early resume must be called with IRQs disabled */ + .resume_noirq = pcmcia_socket_dev_resume_noirq, + .thaw_noirq = pcmcia_socket_dev_resume_noirq, + .restore_noirq = pcmcia_socket_dev_resume_noirq, + .complete = pcmcia_socket_dev_complete, +}; + +#define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops) + +#else /* CONFIG_PM */ + +#define PCMCIA_SOCKET_CLASS_PM_OPS NULL + +#endif /* CONFIG_PM */ + +struct class pcmcia_socket_class = { + .name = "pcmcia_socket", + .dev_uevent = pcmcia_socket_uevent, + .dev_release = pcmcia_release_socket, + .class_release = pcmcia_release_socket_class, + .pm = PCMCIA_SOCKET_CLASS_PM_OPS, +}; +EXPORT_SYMBOL(pcmcia_socket_class); + + +static int __init init_pcmcia_cs(void) +{ + init_completion(&pcmcia_unload); + return class_register(&pcmcia_socket_class); +} + +static void __exit exit_pcmcia_cs(void) +{ + class_unregister(&pcmcia_socket_class); + wait_for_completion(&pcmcia_unload); +} + +subsys_initcall(init_pcmcia_cs); +module_exit(exit_pcmcia_cs); + -- cgit v1.2.3