// SPDX-License-Identifier: GPL-2.0-only /* * cs.c -- Kernel Card Services - core services * * The initial developer of the original code is David A. Hinds * <[email protected]>. 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/device.h> #include <linux/kthread.h> #include <linux/freezer.h> #include <asm/irq.h> #include <pcmcia/ss.h> #include <pcmcia/cistpl.h> #include <pcmcia/cisreg.h> #include <pcmcia/ds.h> #include "cs_internal.h" /* Module parameters */ MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; #define INT_MODULE_PARM(n, v) … 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 = …; EXPORT_SYMBOL(…); /* List of all sockets, protected by a rwsem */ LIST_HEAD(…); EXPORT_SYMBOL(…); DECLARE_RWSEM(…) …; EXPORT_SYMBOL(…); struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) { … } EXPORT_SYMBOL(…); void pcmcia_put_socket(struct pcmcia_socket *skt) { … } EXPORT_SYMBOL(…); static void pcmcia_release_socket(struct device *dev) { … } 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) { … } /* pcmcia_register_socket */ EXPORT_SYMBOL(…); /** * pcmcia_unregister_socket - remove a pcmcia socket device * @socket: the &socket to unregister */ void pcmcia_unregister_socket(struct pcmcia_socket *socket) { … } /* pcmcia_unregister_socket */ EXPORT_SYMBOL(…); struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) { … } EXPORT_SYMBOL(…); static int socket_reset(struct pcmcia_socket *skt) { … } /* * 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) { … } static int socket_setup(struct pcmcia_socket *skt, int initial_delay) { … } /* * 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) { … } static int socket_suspend(struct pcmcia_socket *skt) { … } static int socket_early_resume(struct pcmcia_socket *skt) { … } static int socket_late_resume(struct pcmcia_socket *skt) { … } /* * 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) { … } /* * 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) { … } static void socket_remove(struct pcmcia_socket *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) { … } static int pccardd(void *__skt) { … } /* * 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) { … } /* pcmcia_parse_events */ EXPORT_SYMBOL(…); /** * 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) { … } EXPORT_SYMBOL(…); /* register pcmcia_callback */ int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) { … } EXPORT_SYMBOL(…); /* 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) { … } /* reset_card */ EXPORT_SYMBOL(…); static int pcmcia_socket_uevent(const struct device *dev, struct kobj_uevent_env *env) { … } static struct completion pcmcia_unload; static void pcmcia_release_socket_class(const struct class *data) { … } #ifdef CONFIG_PM static int __pcmcia_pm_op(struct device *dev, int (*callback) (struct pcmcia_socket *skt)) { … } static int pcmcia_socket_dev_suspend_noirq(struct device *dev) { … } static int pcmcia_socket_dev_resume_noirq(struct device *dev) { … } static int __used pcmcia_socket_dev_resume(struct device *dev) { … } static void __used pcmcia_socket_dev_complete(struct device *dev) { … } static const struct dev_pm_ops pcmcia_socket_pm_ops = …; #define PCMCIA_SOCKET_CLASS_PM_OPS … #else /* CONFIG_PM */ #define PCMCIA_SOCKET_CLASS_PM_OPS … #endif /* CONFIG_PM */ const struct class pcmcia_socket_class = …; EXPORT_SYMBOL(…); static int __init init_pcmcia_cs(void) { … } static void __exit exit_pcmcia_cs(void) { … } subsys_initcall(init_pcmcia_cs); module_exit(exit_pcmcia_cs);
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