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1007 lines
23 KiB
1007 lines
23 KiB
/*
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* cs.c -- Kernel Card Services - core services
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The initial developer of the original code is David A. Hinds
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* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
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* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
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*
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* (C) 1999 David A. Hinds
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/config.h>
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#include <linux/string.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/timer.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/pci.h>
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#include <linux/device.h>
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#include <asm/system.h>
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#include <asm/irq.h>
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#define IN_CARD_SERVICES
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#include <pcmcia/version.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/cs.h>
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#include <pcmcia/bulkmem.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/cisreg.h>
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#include <pcmcia/ds.h>
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#include "cs_internal.h"
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#ifdef CONFIG_PCI
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#define PCI_OPT " [pci]"
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#else
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#define PCI_OPT ""
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#endif
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#ifdef CONFIG_CARDBUS
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#define CB_OPT " [cardbus]"
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#else
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#define CB_OPT ""
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#endif
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#ifdef CONFIG_PM
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#define PM_OPT " [pm]"
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#else
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#define PM_OPT ""
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#endif
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#if !defined(CONFIG_CARDBUS) && !defined(CONFIG_PCI) && !defined(CONFIG_PM)
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#define OPTIONS " none"
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#else
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#define OPTIONS PCI_OPT CB_OPT PM_OPT
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#endif
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static const char *release = "Linux Kernel Card Services";
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static const char *options = "options: " OPTIONS;
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/*====================================================================*/
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/* Module parameters */
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MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
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MODULE_DESCRIPTION("Linux Kernel Card Services\noptions:" OPTIONS);
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MODULE_LICENSE("GPL");
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#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
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INT_MODULE_PARM(setup_delay, 10); /* centiseconds */
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INT_MODULE_PARM(resume_delay, 20); /* centiseconds */
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INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */
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INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */
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INT_MODULE_PARM(reset_time, 10); /* usecs */
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INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */
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INT_MODULE_PARM(unreset_check, 10); /* centiseconds */
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INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */
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/* Access speed for attribute memory windows */
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INT_MODULE_PARM(cis_speed, 300); /* ns */
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#ifdef DEBUG
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static int pc_debug;
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module_param(pc_debug, int, 0644);
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int cs_debug_level(int level)
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{
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return pc_debug > level;
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}
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#endif
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/*====================================================================*/
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socket_state_t dead_socket = {
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.csc_mask = SS_DETECT,
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};
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/* List of all sockets, protected by a rwsem */
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LIST_HEAD(pcmcia_socket_list);
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DECLARE_RWSEM(pcmcia_socket_list_rwsem);
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EXPORT_SYMBOL(pcmcia_socket_list);
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EXPORT_SYMBOL(pcmcia_socket_list_rwsem);
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/*====================================================================
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Low-level PC Card interface drivers need to register with Card
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Services using these calls.
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======================================================================*/
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/**
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* socket drivers are expected to use the following callbacks in their
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* .drv struct:
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* - pcmcia_socket_dev_suspend
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* - pcmcia_socket_dev_resume
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* These functions check for the appropriate struct pcmcia_soket arrays,
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* and pass them to the low-level functions pcmcia_{suspend,resume}_socket
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*/
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static int socket_resume(struct pcmcia_socket *skt);
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static int socket_suspend(struct pcmcia_socket *skt);
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int pcmcia_socket_dev_suspend(struct device *dev, pm_message_t state)
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{
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struct pcmcia_socket *socket;
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down_read(&pcmcia_socket_list_rwsem);
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list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
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if (socket->dev.dev != dev)
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continue;
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down(&socket->skt_sem);
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socket_suspend(socket);
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up(&socket->skt_sem);
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}
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up_read(&pcmcia_socket_list_rwsem);
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return 0;
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}
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EXPORT_SYMBOL(pcmcia_socket_dev_suspend);
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int pcmcia_socket_dev_resume(struct device *dev)
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{
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struct pcmcia_socket *socket;
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down_read(&pcmcia_socket_list_rwsem);
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list_for_each_entry(socket, &pcmcia_socket_list, socket_list) {
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if (socket->dev.dev != dev)
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continue;
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down(&socket->skt_sem);
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socket_resume(socket);
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up(&socket->skt_sem);
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}
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up_read(&pcmcia_socket_list_rwsem);
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return 0;
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}
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EXPORT_SYMBOL(pcmcia_socket_dev_resume);
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struct pcmcia_socket * pcmcia_get_socket(struct pcmcia_socket *skt)
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{
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struct class_device *cl_dev = class_device_get(&skt->dev);
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if (!cl_dev)
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return NULL;
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skt = class_get_devdata(cl_dev);
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if (!try_module_get(skt->owner)) {
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class_device_put(&skt->dev);
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return NULL;
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}
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return (skt);
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}
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EXPORT_SYMBOL(pcmcia_get_socket);
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void pcmcia_put_socket(struct pcmcia_socket *skt)
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{
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module_put(skt->owner);
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class_device_put(&skt->dev);
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}
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EXPORT_SYMBOL(pcmcia_put_socket);
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static void pcmcia_release_socket(struct class_device *class_dev)
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{
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struct pcmcia_socket *socket = class_get_devdata(class_dev);
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complete(&socket->socket_released);
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}
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static int pccardd(void *__skt);
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/**
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* pcmcia_register_socket - add a new pcmcia socket device
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*/
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int pcmcia_register_socket(struct pcmcia_socket *socket)
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{
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int ret;
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if (!socket || !socket->ops || !socket->dev.dev || !socket->resource_ops)
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return -EINVAL;
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cs_dbg(socket, 0, "pcmcia_register_socket(0x%p)\n", socket->ops);
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spin_lock_init(&socket->lock);
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if (socket->resource_ops->init) {
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ret = socket->resource_ops->init(socket);
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if (ret)
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return (ret);
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}
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/* try to obtain a socket number [yes, it gets ugly if we
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* register more than 2^sizeof(unsigned int) pcmcia
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* sockets... but the socket number is deprecated
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* anyways, so I don't care] */
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down_write(&pcmcia_socket_list_rwsem);
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if (list_empty(&pcmcia_socket_list))
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socket->sock = 0;
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else {
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unsigned int found, i = 1;
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struct pcmcia_socket *tmp;
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do {
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found = 1;
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list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) {
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if (tmp->sock == i)
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found = 0;
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}
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i++;
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} while (!found);
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socket->sock = i - 1;
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}
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list_add_tail(&socket->socket_list, &pcmcia_socket_list);
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up_write(&pcmcia_socket_list_rwsem);
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/* set proper values in socket->dev */
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socket->dev.class_data = socket;
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socket->dev.class = &pcmcia_socket_class;
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snprintf(socket->dev.class_id, BUS_ID_SIZE, "pcmcia_socket%u", socket->sock);
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/* base address = 0, map = 0 */
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socket->cis_mem.flags = 0;
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socket->cis_mem.speed = cis_speed;
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INIT_LIST_HEAD(&socket->cis_cache);
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init_completion(&socket->socket_released);
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init_completion(&socket->thread_done);
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init_waitqueue_head(&socket->thread_wait);
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init_MUTEX(&socket->skt_sem);
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spin_lock_init(&socket->thread_lock);
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ret = kernel_thread(pccardd, socket, CLONE_KERNEL);
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if (ret < 0)
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goto err;
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wait_for_completion(&socket->thread_done);
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if(!socket->thread) {
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printk(KERN_WARNING "PCMCIA: warning: socket thread for socket %p did not start\n", socket);
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return -EIO;
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}
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pcmcia_parse_events(socket, SS_DETECT);
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return 0;
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err:
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down_write(&pcmcia_socket_list_rwsem);
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list_del(&socket->socket_list);
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up_write(&pcmcia_socket_list_rwsem);
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return ret;
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} /* pcmcia_register_socket */
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EXPORT_SYMBOL(pcmcia_register_socket);
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/**
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* pcmcia_unregister_socket - remove a pcmcia socket device
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*/
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void pcmcia_unregister_socket(struct pcmcia_socket *socket)
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{
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if (!socket)
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return;
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cs_dbg(socket, 0, "pcmcia_unregister_socket(0x%p)\n", socket->ops);
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if (socket->thread) {
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init_completion(&socket->thread_done);
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socket->thread = NULL;
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wake_up(&socket->thread_wait);
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wait_for_completion(&socket->thread_done);
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}
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release_cis_mem(socket);
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/* remove from our own list */
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down_write(&pcmcia_socket_list_rwsem);
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list_del(&socket->socket_list);
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up_write(&pcmcia_socket_list_rwsem);
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/* wait for sysfs to drop all references */
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release_resource_db(socket);
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wait_for_completion(&socket->socket_released);
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} /* pcmcia_unregister_socket */
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EXPORT_SYMBOL(pcmcia_unregister_socket);
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struct pcmcia_socket * pcmcia_get_socket_by_nr(unsigned int nr)
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{
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struct pcmcia_socket *s;
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down_read(&pcmcia_socket_list_rwsem);
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list_for_each_entry(s, &pcmcia_socket_list, socket_list)
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if (s->sock == nr) {
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up_read(&pcmcia_socket_list_rwsem);
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return s;
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}
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up_read(&pcmcia_socket_list_rwsem);
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return NULL;
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}
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EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
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/*======================================================================
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socket_setup() and shutdown_socket() are called by the main event
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handler when card insertion and removal events are received.
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socket_setup() turns on socket power and resets the socket, in two stages.
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shutdown_socket() unconfigures a socket and turns off socket power.
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======================================================================*/
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static void shutdown_socket(struct pcmcia_socket *s)
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{
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cs_dbg(s, 1, "shutdown_socket\n");
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/* Blank out the socket state */
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s->socket = dead_socket;
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s->ops->init(s);
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s->ops->set_socket(s, &s->socket);
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s->irq.AssignedIRQ = s->irq.Config = 0;
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s->lock_count = 0;
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destroy_cis_cache(s);
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#ifdef CONFIG_CARDBUS
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cb_free(s);
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#endif
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s->functions = 0;
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if (s->config) {
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kfree(s->config);
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s->config = NULL;
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}
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{
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int status;
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s->ops->get_status(s, &status);
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if (status & SS_POWERON) {
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printk(KERN_ERR "PCMCIA: socket %p: *** DANGER *** unable to remove socket power\n", s);
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}
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}
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} /* shutdown_socket */
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/*======================================================================
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The central event handler. Send_event() sends an event to the
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16-bit subsystem, which then calls the relevant device drivers.
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Parse_events() interprets the event bits from
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a card status change report. Do_shutdown() handles the high
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priority stuff associated with a card removal.
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======================================================================*/
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/* NOTE: send_event needs to be called with skt->sem held. */
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static int send_event(struct pcmcia_socket *s, event_t event, int priority)
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{
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int ret;
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if (s->state & SOCKET_CARDBUS)
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return 0;
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cs_dbg(s, 1, "send_event(event %d, pri %d, callback 0x%p)\n",
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event, priority, s->callback);
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if (!s->callback)
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return 0;
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if (!try_module_get(s->callback->owner))
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return 0;
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ret = s->callback->event(s, event, priority);
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module_put(s->callback->owner);
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return ret;
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}
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static void socket_remove_drivers(struct pcmcia_socket *skt)
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{
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cs_dbg(skt, 4, "remove_drivers\n");
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send_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
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}
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static void socket_shutdown(struct pcmcia_socket *skt)
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{
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cs_dbg(skt, 4, "shutdown\n");
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socket_remove_drivers(skt);
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skt->state &= SOCKET_INUSE|SOCKET_PRESENT;
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msleep(shutdown_delay * 10);
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skt->state &= SOCKET_INUSE;
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shutdown_socket(skt);
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}
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static int socket_reset(struct pcmcia_socket *skt)
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{
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int status, i;
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cs_dbg(skt, 4, "reset\n");
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skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET;
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skt->ops->set_socket(skt, &skt->socket);
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udelay((long)reset_time);
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skt->socket.flags &= ~SS_RESET;
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skt->ops->set_socket(skt, &skt->socket);
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msleep(unreset_delay * 10);
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for (i = 0; i < unreset_limit; i++) {
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skt->ops->get_status(skt, &status);
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if (!(status & SS_DETECT))
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return CS_NO_CARD;
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if (status & SS_READY)
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return CS_SUCCESS;
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msleep(unreset_check * 10);
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}
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cs_err(skt, "time out after reset.\n");
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return CS_GENERAL_FAILURE;
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}
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static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
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{
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int status, i;
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cs_dbg(skt, 4, "setup\n");
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skt->ops->get_status(skt, &status);
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if (!(status & SS_DETECT))
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return CS_NO_CARD;
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msleep(initial_delay * 10);
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for (i = 0; i < 100; i++) {
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skt->ops->get_status(skt, &status);
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if (!(status & SS_DETECT))
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return CS_NO_CARD;
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if (!(status & SS_PENDING))
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break;
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msleep(100);
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}
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if (status & SS_PENDING) {
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cs_err(skt, "voltage interrogation timed out.\n");
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return CS_GENERAL_FAILURE;
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}
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if (status & SS_CARDBUS) {
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skt->state |= SOCKET_CARDBUS;
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#ifndef CONFIG_CARDBUS
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cs_err(skt, "cardbus cards are not supported.\n");
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return CS_BAD_TYPE;
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#endif
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}
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/*
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* Decode the card voltage requirements, and apply power to the card.
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*/
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if (status & SS_3VCARD)
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skt->socket.Vcc = skt->socket.Vpp = 33;
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else if (!(status & SS_XVCARD))
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skt->socket.Vcc = skt->socket.Vpp = 50;
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else {
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cs_err(skt, "unsupported voltage key.\n");
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return CS_BAD_TYPE;
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}
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if (skt->power_hook)
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skt->power_hook(skt, HOOK_POWER_PRE);
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skt->socket.flags = 0;
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skt->ops->set_socket(skt, &skt->socket);
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/*
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* Wait "vcc_settle" for the supply to stabilise.
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*/
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msleep(vcc_settle * 10);
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skt->ops->get_status(skt, &status);
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if (!(status & SS_POWERON)) {
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cs_err(skt, "unable to apply power.\n");
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return CS_BAD_TYPE;
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}
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status = socket_reset(skt);
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if (skt->power_hook)
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skt->power_hook(skt, HOOK_POWER_POST);
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return status;
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}
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/*
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* Handle card insertion. Setup the socket, reset the card,
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* and then tell the rest of PCMCIA that a card is present.
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*/
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static int socket_insert(struct pcmcia_socket *skt)
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{
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int ret;
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cs_dbg(skt, 4, "insert\n");
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if (!cs_socket_get(skt))
|
|
return CS_NO_CARD;
|
|
|
|
ret = socket_setup(skt, setup_delay);
|
|
if (ret == CS_SUCCESS) {
|
|
skt->state |= SOCKET_PRESENT;
|
|
#ifdef CONFIG_CARDBUS
|
|
if (skt->state & SOCKET_CARDBUS) {
|
|
cb_alloc(skt);
|
|
skt->state |= SOCKET_CARDBUS_CONFIG;
|
|
}
|
|
#endif
|
|
cs_dbg(skt, 4, "insert done\n");
|
|
|
|
send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
|
|
} else {
|
|
socket_shutdown(skt);
|
|
cs_socket_put(skt);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int socket_suspend(struct pcmcia_socket *skt)
|
|
{
|
|
if (skt->state & SOCKET_SUSPEND)
|
|
return CS_IN_USE;
|
|
|
|
send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
|
|
skt->socket = dead_socket;
|
|
skt->ops->set_socket(skt, &skt->socket);
|
|
if (skt->ops->suspend)
|
|
skt->ops->suspend(skt);
|
|
skt->state |= SOCKET_SUSPEND;
|
|
|
|
return CS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Resume a socket. If a card is present, verify its CIS against
|
|
* our cached copy. If they are different, the card has been
|
|
* replaced, and we need to tell the drivers.
|
|
*/
|
|
static int socket_resume(struct pcmcia_socket *skt)
|
|
{
|
|
int ret;
|
|
|
|
if (!(skt->state & SOCKET_SUSPEND))
|
|
return CS_IN_USE;
|
|
|
|
skt->socket = dead_socket;
|
|
skt->ops->init(skt);
|
|
skt->ops->set_socket(skt, &skt->socket);
|
|
|
|
if (!(skt->state & SOCKET_PRESENT)) {
|
|
skt->state &= ~SOCKET_SUSPEND;
|
|
return socket_insert(skt);
|
|
}
|
|
|
|
ret = socket_setup(skt, resume_delay);
|
|
if (ret == CS_SUCCESS) {
|
|
/*
|
|
* FIXME: need a better check here for cardbus cards.
|
|
*/
|
|
if (verify_cis_cache(skt) != 0) {
|
|
cs_dbg(skt, 4, "cis mismatch - different card\n");
|
|
socket_remove_drivers(skt);
|
|
destroy_cis_cache(skt);
|
|
/*
|
|
* Workaround: give DS time to schedule removal.
|
|
* Remove me once the 100ms delay is eliminated
|
|
* in ds.c
|
|
*/
|
|
msleep(200);
|
|
send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
|
|
} else {
|
|
cs_dbg(skt, 4, "cis matches cache\n");
|
|
send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
|
|
}
|
|
} else {
|
|
socket_shutdown(skt);
|
|
cs_socket_put(skt);
|
|
}
|
|
|
|
skt->state &= ~SOCKET_SUSPEND;
|
|
|
|
return CS_SUCCESS;
|
|
}
|
|
|
|
static void socket_remove(struct pcmcia_socket *skt)
|
|
{
|
|
socket_shutdown(skt);
|
|
cs_socket_put(skt);
|
|
}
|
|
|
|
/*
|
|
* Process a socket card detect status change.
|
|
*
|
|
* If we don't have a card already present, delay the detect event for
|
|
* about 20ms (to be on the safe side) before reading the socket status.
|
|
*
|
|
* Some i82365-based systems send multiple SS_DETECT events during card
|
|
* insertion, and the "card present" status bit seems to bounce. This
|
|
* will probably be true with GPIO-based card detection systems after
|
|
* the product has aged.
|
|
*/
|
|
static void socket_detect_change(struct pcmcia_socket *skt)
|
|
{
|
|
if (!(skt->state & SOCKET_SUSPEND)) {
|
|
int status;
|
|
|
|
if (!(skt->state & SOCKET_PRESENT))
|
|
msleep(20);
|
|
|
|
skt->ops->get_status(skt, &status);
|
|
if ((skt->state & SOCKET_PRESENT) &&
|
|
!(status & SS_DETECT))
|
|
socket_remove(skt);
|
|
if (!(skt->state & SOCKET_PRESENT) &&
|
|
(status & SS_DETECT))
|
|
socket_insert(skt);
|
|
}
|
|
}
|
|
|
|
static int pccardd(void *__skt)
|
|
{
|
|
struct pcmcia_socket *skt = __skt;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
int ret;
|
|
|
|
daemonize("pccardd");
|
|
|
|
skt->thread = current;
|
|
skt->socket = dead_socket;
|
|
skt->ops->init(skt);
|
|
skt->ops->set_socket(skt, &skt->socket);
|
|
|
|
/* register with the device core */
|
|
ret = class_device_register(&skt->dev);
|
|
if (ret) {
|
|
printk(KERN_WARNING "PCMCIA: unable to register socket 0x%p\n",
|
|
skt);
|
|
skt->thread = NULL;
|
|
complete_and_exit(&skt->thread_done, 0);
|
|
}
|
|
complete(&skt->thread_done);
|
|
|
|
add_wait_queue(&skt->thread_wait, &wait);
|
|
for (;;) {
|
|
unsigned long flags;
|
|
unsigned int events;
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
spin_lock_irqsave(&skt->thread_lock, flags);
|
|
events = skt->thread_events;
|
|
skt->thread_events = 0;
|
|
spin_unlock_irqrestore(&skt->thread_lock, flags);
|
|
|
|
if (events) {
|
|
down(&skt->skt_sem);
|
|
if (events & SS_DETECT)
|
|
socket_detect_change(skt);
|
|
if (events & SS_BATDEAD)
|
|
send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
|
|
if (events & SS_BATWARN)
|
|
send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
|
|
if (events & SS_READY)
|
|
send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
|
|
up(&skt->skt_sem);
|
|
continue;
|
|
}
|
|
|
|
schedule();
|
|
try_to_freeze();
|
|
|
|
if (!skt->thread)
|
|
break;
|
|
}
|
|
remove_wait_queue(&skt->thread_wait, &wait);
|
|
|
|
/* remove from the device core */
|
|
class_device_unregister(&skt->dev);
|
|
|
|
complete_and_exit(&skt->thread_done, 0);
|
|
}
|
|
|
|
/*
|
|
* Yenta (at least) probes interrupts before registering the socket and
|
|
* starting the handler thread.
|
|
*/
|
|
void pcmcia_parse_events(struct pcmcia_socket *s, u_int events)
|
|
{
|
|
cs_dbg(s, 4, "parse_events: events %08x\n", events);
|
|
if (s->thread) {
|
|
spin_lock(&s->thread_lock);
|
|
s->thread_events |= events;
|
|
spin_unlock(&s->thread_lock);
|
|
|
|
wake_up(&s->thread_wait);
|
|
}
|
|
} /* pcmcia_parse_events */
|
|
|
|
|
|
/*=====================================================================
|
|
|
|
Return the PCI device associated with a card..
|
|
|
|
======================================================================*/
|
|
|
|
#ifdef CONFIG_CARDBUS
|
|
|
|
struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s)
|
|
{
|
|
if (!s || !(s->state & SOCKET_CARDBUS))
|
|
return NULL;
|
|
|
|
return s->cb_dev->subordinate;
|
|
}
|
|
|
|
EXPORT_SYMBOL(pcmcia_lookup_bus);
|
|
|
|
#endif
|
|
|
|
|
|
/* register pcmcia_callback */
|
|
int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
|
|
{
|
|
int ret = 0;
|
|
|
|
/* s->skt_sem also protects s->callback */
|
|
down(&s->skt_sem);
|
|
|
|
if (c) {
|
|
/* registration */
|
|
if (s->callback) {
|
|
ret = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
s->callback = c;
|
|
|
|
if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
|
|
send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
|
|
} else
|
|
s->callback = NULL;
|
|
err:
|
|
up(&s->skt_sem);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pccard_register_pcmcia);
|
|
|
|
|
|
/*======================================================================
|
|
|
|
I'm not sure which "reset" function this is supposed to use,
|
|
but for now, it uses the low-level interface's reset, not the
|
|
CIS register.
|
|
|
|
======================================================================*/
|
|
|
|
int pccard_reset_card(struct pcmcia_socket *skt)
|
|
{
|
|
int ret;
|
|
|
|
cs_dbg(skt, 1, "resetting socket\n");
|
|
|
|
down(&skt->skt_sem);
|
|
do {
|
|
if (!(skt->state & SOCKET_PRESENT)) {
|
|
ret = CS_NO_CARD;
|
|
break;
|
|
}
|
|
if (skt->state & SOCKET_SUSPEND) {
|
|
ret = CS_IN_USE;
|
|
break;
|
|
}
|
|
if (skt->state & SOCKET_CARDBUS) {
|
|
ret = CS_UNSUPPORTED_FUNCTION;
|
|
break;
|
|
}
|
|
|
|
ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
|
|
if (ret == 0) {
|
|
send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
|
|
if (socket_reset(skt) == CS_SUCCESS)
|
|
send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
|
|
}
|
|
|
|
ret = CS_SUCCESS;
|
|
} while (0);
|
|
up(&skt->skt_sem);
|
|
|
|
return ret;
|
|
} /* reset_card */
|
|
EXPORT_SYMBOL(pccard_reset_card);
|
|
|
|
/*======================================================================
|
|
|
|
These shut down or wake up a socket. They are sort of user
|
|
initiated versions of the APM suspend and resume actions.
|
|
|
|
======================================================================*/
|
|
|
|
int pcmcia_suspend_card(struct pcmcia_socket *skt)
|
|
{
|
|
int ret;
|
|
|
|
cs_dbg(skt, 1, "suspending socket\n");
|
|
|
|
down(&skt->skt_sem);
|
|
do {
|
|
if (!(skt->state & SOCKET_PRESENT)) {
|
|
ret = CS_NO_CARD;
|
|
break;
|
|
}
|
|
if (skt->state & SOCKET_CARDBUS) {
|
|
ret = CS_UNSUPPORTED_FUNCTION;
|
|
break;
|
|
}
|
|
ret = socket_suspend(skt);
|
|
} while (0);
|
|
up(&skt->skt_sem);
|
|
|
|
return ret;
|
|
} /* suspend_card */
|
|
|
|
int pcmcia_resume_card(struct pcmcia_socket *skt)
|
|
{
|
|
int ret;
|
|
|
|
cs_dbg(skt, 1, "waking up socket\n");
|
|
|
|
down(&skt->skt_sem);
|
|
do {
|
|
if (!(skt->state & SOCKET_PRESENT)) {
|
|
ret = CS_NO_CARD;
|
|
break;
|
|
}
|
|
if (skt->state & SOCKET_CARDBUS) {
|
|
ret = CS_UNSUPPORTED_FUNCTION;
|
|
break;
|
|
}
|
|
ret = socket_resume(skt);
|
|
} while (0);
|
|
up(&skt->skt_sem);
|
|
|
|
return ret;
|
|
} /* resume_card */
|
|
|
|
/*======================================================================
|
|
|
|
These handle user requests to eject or insert a card.
|
|
|
|
======================================================================*/
|
|
|
|
int pcmcia_eject_card(struct pcmcia_socket *skt)
|
|
{
|
|
int ret;
|
|
|
|
cs_dbg(skt, 1, "user eject request\n");
|
|
|
|
down(&skt->skt_sem);
|
|
do {
|
|
if (!(skt->state & SOCKET_PRESENT)) {
|
|
ret = -ENODEV;
|
|
break;
|
|
}
|
|
|
|
ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
|
|
if (ret != 0) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
socket_remove(skt);
|
|
ret = 0;
|
|
} while (0);
|
|
up(&skt->skt_sem);
|
|
|
|
return ret;
|
|
} /* eject_card */
|
|
|
|
int pcmcia_insert_card(struct pcmcia_socket *skt)
|
|
{
|
|
int ret;
|
|
|
|
cs_dbg(skt, 1, "user insert request\n");
|
|
|
|
down(&skt->skt_sem);
|
|
do {
|
|
if (skt->state & SOCKET_PRESENT) {
|
|
ret = -EBUSY;
|
|
break;
|
|
}
|
|
if (socket_insert(skt) == CS_NO_CARD) {
|
|
ret = -ENODEV;
|
|
break;
|
|
}
|
|
ret = 0;
|
|
} while (0);
|
|
up(&skt->skt_sem);
|
|
|
|
return ret;
|
|
} /* insert_card */
|
|
|
|
static int pcmcia_socket_hotplug(struct class_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_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size,
|
|
&length, "SOCKET_NO=%u", s->sock))
|
|
return -ENOMEM;
|
|
|
|
envp[i] = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*======================================================================
|
|
|
|
OS-specific module glue goes here
|
|
|
|
======================================================================*/
|
|
/* in alpha order */
|
|
EXPORT_SYMBOL(pcmcia_eject_card);
|
|
EXPORT_SYMBOL(pcmcia_insert_card);
|
|
EXPORT_SYMBOL(pcmcia_replace_cis);
|
|
EXPORT_SYMBOL(pcmcia_resume_card);
|
|
EXPORT_SYMBOL(pcmcia_suspend_card);
|
|
|
|
EXPORT_SYMBOL(dead_socket);
|
|
EXPORT_SYMBOL(pcmcia_parse_events);
|
|
|
|
struct class pcmcia_socket_class = {
|
|
.name = "pcmcia_socket",
|
|
.hotplug = pcmcia_socket_hotplug,
|
|
.release = pcmcia_release_socket,
|
|
};
|
|
EXPORT_SYMBOL(pcmcia_socket_class);
|
|
|
|
|
|
static int __init init_pcmcia_cs(void)
|
|
{
|
|
int ret;
|
|
printk(KERN_INFO "%s\n", release);
|
|
printk(KERN_INFO " %s\n", options);
|
|
|
|
ret = class_register(&pcmcia_socket_class);
|
|
if (ret)
|
|
return (ret);
|
|
return class_interface_register(&pccard_sysfs_interface);
|
|
}
|
|
|
|
static void __exit exit_pcmcia_cs(void)
|
|
{
|
|
printk(KERN_INFO "unloading Kernel Card Services\n");
|
|
class_interface_unregister(&pccard_sysfs_interface);
|
|
class_unregister(&pcmcia_socket_class);
|
|
}
|
|
|
|
subsys_initcall(init_pcmcia_cs);
|
|
module_exit(exit_pcmcia_cs);
|
|
|
|
/*====================================================================*/
|
|
|
|
|