![Christoph Lameter](/assets/img/avatar_default.png)
1. Establish a simple API for process freezing defined in linux/include/sched.h: frozen(process) Check for frozen process freezing(process) Check if a process is being frozen freeze(process) Tell a process to freeze (go to refrigerator) thaw_process(process) Restart process frozen_process(process) Process is frozen now 2. Remove all references to PF_FREEZE and PF_FROZEN from all kernel sources except sched.h 3. Fix numerous locations where try_to_freeze is manually done by a driver 4. Remove the argument that is no longer necessary from two function calls. 5. Some whitespace cleanup 6. Clear potential race in refrigerator (provides an open window of PF_FREEZE cleared before setting PF_FROZEN, recalc_sigpending does not check PF_FROZEN). This patch does not address the problem of freeze_processes() violating the rule that a task may only modify its own flags by setting PF_FREEZE. This is not clean in an SMP environment. freeze(process) is therefore not SMP safe! Signed-off-by: Christoph Lameter <christoph@lameter.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1927 lines
49 KiB
C
1927 lines
49 KiB
C
/*
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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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/* Access speed for IO windows */
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INT_MODULE_PARM(io_speed, 0); /* 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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#ifdef CONFIG_PCMCIA_PROBE
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/* mask ofIRQs already reserved by other cards, we should avoid using them */
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static u8 pcmcia_used_irq[NR_IRQS];
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#endif
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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.
|
|
*/
|
|
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;
|
|
#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 */
|
|
|
|
|
|
/*======================================================================
|
|
|
|
Special stuff for managing IO windows, because they are scarce.
|
|
|
|
======================================================================*/
|
|
|
|
static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base,
|
|
ioaddr_t num, u_int lines)
|
|
{
|
|
int i;
|
|
kio_addr_t try, align;
|
|
|
|
align = (*base) ? (lines ? 1<<lines : 0) : 1;
|
|
if (align && (align < num)) {
|
|
if (*base) {
|
|
cs_dbg(s, 0, "odd IO request: num %#x align %#lx\n",
|
|
num, align);
|
|
align = 0;
|
|
} else
|
|
while (align && (align < num)) align <<= 1;
|
|
}
|
|
if (*base & ~(align-1)) {
|
|
cs_dbg(s, 0, "odd IO request: base %#x align %#lx\n",
|
|
*base, align);
|
|
align = 0;
|
|
}
|
|
if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
|
|
*base = s->io_offset | (*base & 0x0fff);
|
|
return 0;
|
|
}
|
|
/* Check for an already-allocated window that must conflict with
|
|
what was asked for. It is a hack because it does not catch all
|
|
potential conflicts, just the most obvious ones. */
|
|
for (i = 0; i < MAX_IO_WIN; i++)
|
|
if ((s->io[i].NumPorts != 0) &&
|
|
((s->io[i].BasePort & (align-1)) == *base))
|
|
return 1;
|
|
for (i = 0; i < MAX_IO_WIN; i++) {
|
|
if (s->io[i].NumPorts == 0) {
|
|
s->io[i].res = find_io_region(*base, num, align, s);
|
|
if (s->io[i].res) {
|
|
s->io[i].Attributes = attr;
|
|
s->io[i].BasePort = *base = s->io[i].res->start;
|
|
s->io[i].NumPorts = s->io[i].InUse = num;
|
|
break;
|
|
} else
|
|
return 1;
|
|
} else if (s->io[i].Attributes != attr)
|
|
continue;
|
|
/* Try to extend top of window */
|
|
try = s->io[i].BasePort + s->io[i].NumPorts;
|
|
if ((*base == 0) || (*base == try))
|
|
if (adjust_io_region(s->io[i].res, s->io[i].res->start,
|
|
s->io[i].res->end + num, s) == 0) {
|
|
*base = try;
|
|
s->io[i].NumPorts += num;
|
|
s->io[i].InUse += num;
|
|
break;
|
|
}
|
|
/* Try to extend bottom of window */
|
|
try = s->io[i].BasePort - num;
|
|
if ((*base == 0) || (*base == try))
|
|
if (adjust_io_region(s->io[i].res, s->io[i].res->start - num,
|
|
s->io[i].res->end, s) == 0) {
|
|
s->io[i].BasePort = *base = try;
|
|
s->io[i].NumPorts += num;
|
|
s->io[i].InUse += num;
|
|
break;
|
|
}
|
|
}
|
|
return (i == MAX_IO_WIN);
|
|
} /* alloc_io_space */
|
|
|
|
static void release_io_space(struct pcmcia_socket *s, ioaddr_t base,
|
|
ioaddr_t num)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_IO_WIN; i++) {
|
|
if ((s->io[i].BasePort <= base) &&
|
|
(s->io[i].BasePort+s->io[i].NumPorts >= base+num)) {
|
|
s->io[i].InUse -= num;
|
|
/* Free the window if no one else is using it */
|
|
if (s->io[i].InUse == 0) {
|
|
s->io[i].NumPorts = 0;
|
|
release_resource(s->io[i].res);
|
|
kfree(s->io[i].res);
|
|
s->io[i].res = NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*======================================================================
|
|
|
|
Access_configuration_register() reads and writes configuration
|
|
registers in attribute memory. Memory window 0 is reserved for
|
|
this and the tuple reading services.
|
|
|
|
======================================================================*/
|
|
|
|
int pccard_access_configuration_register(struct pcmcia_socket *s,
|
|
unsigned int function,
|
|
conf_reg_t *reg)
|
|
{
|
|
config_t *c;
|
|
int addr;
|
|
u_char val;
|
|
|
|
if (!s || !s->config)
|
|
return CS_NO_CARD;
|
|
|
|
c = &s->config[function];
|
|
|
|
if (c == NULL)
|
|
return CS_NO_CARD;
|
|
|
|
if (!(c->state & CONFIG_LOCKED))
|
|
return CS_CONFIGURATION_LOCKED;
|
|
|
|
addr = (c->ConfigBase + reg->Offset) >> 1;
|
|
|
|
switch (reg->Action) {
|
|
case CS_READ:
|
|
read_cis_mem(s, 1, addr, 1, &val);
|
|
reg->Value = val;
|
|
break;
|
|
case CS_WRITE:
|
|
val = reg->Value;
|
|
write_cis_mem(s, 1, addr, 1, &val);
|
|
break;
|
|
default:
|
|
return CS_BAD_ARGS;
|
|
break;
|
|
}
|
|
return CS_SUCCESS;
|
|
} /* access_configuration_register */
|
|
EXPORT_SYMBOL(pccard_access_configuration_register);
|
|
|
|
|
|
/*====================================================================*/
|
|
|
|
int pccard_get_configuration_info(struct pcmcia_socket *s,
|
|
unsigned int function,
|
|
config_info_t *config)
|
|
{
|
|
config_t *c;
|
|
|
|
if (!(s->state & SOCKET_PRESENT))
|
|
return CS_NO_CARD;
|
|
|
|
config->Function = function;
|
|
|
|
#ifdef CONFIG_CARDBUS
|
|
if (s->state & SOCKET_CARDBUS) {
|
|
memset(config, 0, sizeof(config_info_t));
|
|
config->Vcc = s->socket.Vcc;
|
|
config->Vpp1 = config->Vpp2 = s->socket.Vpp;
|
|
config->Option = s->cb_dev->subordinate->number;
|
|
if (s->state & SOCKET_CARDBUS_CONFIG) {
|
|
config->Attributes = CONF_VALID_CLIENT;
|
|
config->IntType = INT_CARDBUS;
|
|
config->AssignedIRQ = s->irq.AssignedIRQ;
|
|
if (config->AssignedIRQ)
|
|
config->Attributes |= CONF_ENABLE_IRQ;
|
|
config->BasePort1 = s->io[0].BasePort;
|
|
config->NumPorts1 = s->io[0].NumPorts;
|
|
}
|
|
return CS_SUCCESS;
|
|
}
|
|
#endif
|
|
|
|
c = (s->config != NULL) ? &s->config[function] : NULL;
|
|
|
|
if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
|
|
config->Attributes = 0;
|
|
config->Vcc = s->socket.Vcc;
|
|
config->Vpp1 = config->Vpp2 = s->socket.Vpp;
|
|
return CS_SUCCESS;
|
|
}
|
|
|
|
/* !!! This is a hack !!! */
|
|
memcpy(&config->Attributes, &c->Attributes, sizeof(config_t));
|
|
config->Attributes |= CONF_VALID_CLIENT;
|
|
config->CardValues = c->CardValues;
|
|
config->IRQAttributes = c->irq.Attributes;
|
|
config->AssignedIRQ = s->irq.AssignedIRQ;
|
|
config->BasePort1 = c->io.BasePort1;
|
|
config->NumPorts1 = c->io.NumPorts1;
|
|
config->Attributes1 = c->io.Attributes1;
|
|
config->BasePort2 = c->io.BasePort2;
|
|
config->NumPorts2 = c->io.NumPorts2;
|
|
config->Attributes2 = c->io.Attributes2;
|
|
config->IOAddrLines = c->io.IOAddrLines;
|
|
|
|
return CS_SUCCESS;
|
|
} /* get_configuration_info */
|
|
EXPORT_SYMBOL(pccard_get_configuration_info);
|
|
|
|
/*======================================================================
|
|
|
|
Return information about this version of Card Services.
|
|
|
|
======================================================================*/
|
|
|
|
int pcmcia_get_card_services_info(servinfo_t *info)
|
|
{
|
|
unsigned int socket_count = 0;
|
|
struct list_head *tmp;
|
|
info->Signature[0] = 'C';
|
|
info->Signature[1] = 'S';
|
|
down_read(&pcmcia_socket_list_rwsem);
|
|
list_for_each(tmp, &pcmcia_socket_list)
|
|
socket_count++;
|
|
up_read(&pcmcia_socket_list_rwsem);
|
|
info->Count = socket_count;
|
|
info->Revision = CS_RELEASE_CODE;
|
|
info->CSLevel = 0x0210;
|
|
info->VendorString = (char *)release;
|
|
return CS_SUCCESS;
|
|
} /* get_card_services_info */
|
|
|
|
|
|
/*====================================================================*/
|
|
|
|
int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle, int idx, win_req_t *req)
|
|
{
|
|
window_t *win;
|
|
int w;
|
|
|
|
if (!s || !(s->state & SOCKET_PRESENT))
|
|
return CS_NO_CARD;
|
|
for (w = idx; w < MAX_WIN; w++)
|
|
if (s->state & SOCKET_WIN_REQ(w)) break;
|
|
if (w == MAX_WIN)
|
|
return CS_NO_MORE_ITEMS;
|
|
win = &s->win[w];
|
|
req->Base = win->ctl.res->start;
|
|
req->Size = win->ctl.res->end - win->ctl.res->start + 1;
|
|
req->AccessSpeed = win->ctl.speed;
|
|
req->Attributes = 0;
|
|
if (win->ctl.flags & MAP_ATTRIB)
|
|
req->Attributes |= WIN_MEMORY_TYPE_AM;
|
|
if (win->ctl.flags & MAP_ACTIVE)
|
|
req->Attributes |= WIN_ENABLE;
|
|
if (win->ctl.flags & MAP_16BIT)
|
|
req->Attributes |= WIN_DATA_WIDTH_16;
|
|
if (win->ctl.flags & MAP_USE_WAIT)
|
|
req->Attributes |= WIN_USE_WAIT;
|
|
*handle = win;
|
|
return CS_SUCCESS;
|
|
} /* get_window */
|
|
EXPORT_SYMBOL(pcmcia_get_window);
|
|
|
|
/*=====================================================================
|
|
|
|
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
|
|
|
|
/*======================================================================
|
|
|
|
Get the current socket state bits. We don't support the latched
|
|
SocketState yet: I haven't seen any point for it.
|
|
|
|
======================================================================*/
|
|
|
|
int pccard_get_status(struct pcmcia_socket *s, unsigned int function, cs_status_t *status)
|
|
{
|
|
config_t *c;
|
|
int val;
|
|
|
|
s->ops->get_status(s, &val);
|
|
status->CardState = status->SocketState = 0;
|
|
status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
|
|
status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
|
|
status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
|
|
status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
|
|
if (s->state & SOCKET_SUSPEND)
|
|
status->CardState |= CS_EVENT_PM_SUSPEND;
|
|
if (!(s->state & SOCKET_PRESENT))
|
|
return CS_NO_CARD;
|
|
|
|
c = (s->config != NULL) ? &s->config[function] : NULL;
|
|
if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
|
|
(c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
|
|
u_char reg;
|
|
if (c->Present & PRESENT_PIN_REPLACE) {
|
|
read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, ®);
|
|
status->CardState |=
|
|
(reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
|
|
status->CardState |=
|
|
(reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
|
|
status->CardState |=
|
|
(reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
|
|
status->CardState |=
|
|
(reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
|
|
} else {
|
|
/* No PRR? Then assume we're always ready */
|
|
status->CardState |= CS_EVENT_READY_CHANGE;
|
|
}
|
|
if (c->Present & PRESENT_EXT_STATUS) {
|
|
read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, ®);
|
|
status->CardState |=
|
|
(reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
|
|
}
|
|
return CS_SUCCESS;
|
|
}
|
|
status->CardState |=
|
|
(val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
|
|
status->CardState |=
|
|
(val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
|
|
status->CardState |=
|
|
(val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
|
|
status->CardState |=
|
|
(val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
|
|
return CS_SUCCESS;
|
|
} /* get_status */
|
|
EXPORT_SYMBOL(pccard_get_status);
|
|
|
|
/*======================================================================
|
|
|
|
Change the card address of an already open memory window.
|
|
|
|
======================================================================*/
|
|
|
|
int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
|
|
{
|
|
if ((win == NULL) || (win->magic != WINDOW_MAGIC))
|
|
return CS_BAD_HANDLE;
|
|
req->Page = 0;
|
|
req->CardOffset = win->ctl.card_start;
|
|
return CS_SUCCESS;
|
|
} /* get_mem_page */
|
|
|
|
int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
|
|
{
|
|
struct pcmcia_socket *s;
|
|
if ((win == NULL) || (win->magic != WINDOW_MAGIC))
|
|
return CS_BAD_HANDLE;
|
|
if (req->Page != 0)
|
|
return CS_BAD_PAGE;
|
|
s = win->sock;
|
|
win->ctl.card_start = req->CardOffset;
|
|
if (s->ops->set_mem_map(s, &win->ctl) != 0)
|
|
return CS_BAD_OFFSET;
|
|
return CS_SUCCESS;
|
|
} /* map_mem_page */
|
|
|
|
/*======================================================================
|
|
|
|
Modify a locked socket configuration
|
|
|
|
======================================================================*/
|
|
|
|
int pcmcia_modify_configuration(client_handle_t handle,
|
|
modconf_t *mod)
|
|
{
|
|
struct pcmcia_socket *s;
|
|
config_t *c;
|
|
|
|
if (CHECK_HANDLE(handle))
|
|
return CS_BAD_HANDLE;
|
|
s = SOCKET(handle); c = CONFIG(handle);
|
|
if (!(s->state & SOCKET_PRESENT))
|
|
return CS_NO_CARD;
|
|
if (!(c->state & CONFIG_LOCKED))
|
|
return CS_CONFIGURATION_LOCKED;
|
|
|
|
if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
|
|
if (mod->Attributes & CONF_ENABLE_IRQ) {
|
|
c->Attributes |= CONF_ENABLE_IRQ;
|
|
s->socket.io_irq = s->irq.AssignedIRQ;
|
|
} else {
|
|
c->Attributes &= ~CONF_ENABLE_IRQ;
|
|
s->socket.io_irq = 0;
|
|
}
|
|
s->ops->set_socket(s, &s->socket);
|
|
}
|
|
|
|
if (mod->Attributes & CONF_VCC_CHANGE_VALID)
|
|
return CS_BAD_VCC;
|
|
|
|
/* We only allow changing Vpp1 and Vpp2 to the same value */
|
|
if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
|
|
(mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
|
|
if (mod->Vpp1 != mod->Vpp2)
|
|
return CS_BAD_VPP;
|
|
c->Vpp1 = c->Vpp2 = s->socket.Vpp = mod->Vpp1;
|
|
if (s->ops->set_socket(s, &s->socket))
|
|
return CS_BAD_VPP;
|
|
} else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
|
|
(mod->Attributes & CONF_VPP2_CHANGE_VALID))
|
|
return CS_BAD_VPP;
|
|
|
|
return CS_SUCCESS;
|
|
} /* modify_configuration */
|
|
|
|
/* 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);
|
|
|
|
/*====================================================================*/
|
|
|
|
int pcmcia_release_configuration(client_handle_t handle)
|
|
{
|
|
pccard_io_map io = { 0, 0, 0, 0, 1 };
|
|
struct pcmcia_socket *s;
|
|
int i;
|
|
|
|
if (CHECK_HANDLE(handle) ||
|
|
!(handle->state & CLIENT_CONFIG_LOCKED))
|
|
return CS_BAD_HANDLE;
|
|
handle->state &= ~CLIENT_CONFIG_LOCKED;
|
|
s = SOCKET(handle);
|
|
|
|
#ifdef CONFIG_CARDBUS
|
|
if (handle->state & CLIENT_CARDBUS)
|
|
return CS_SUCCESS;
|
|
#endif
|
|
|
|
if (!(handle->state & CLIENT_STALE)) {
|
|
config_t *c = CONFIG(handle);
|
|
if (--(s->lock_count) == 0) {
|
|
s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
|
|
s->socket.Vpp = 0;
|
|
s->socket.io_irq = 0;
|
|
s->ops->set_socket(s, &s->socket);
|
|
}
|
|
if (c->state & CONFIG_IO_REQ)
|
|
for (i = 0; i < MAX_IO_WIN; i++) {
|
|
if (s->io[i].NumPorts == 0)
|
|
continue;
|
|
s->io[i].Config--;
|
|
if (s->io[i].Config != 0)
|
|
continue;
|
|
io.map = i;
|
|
s->ops->set_io_map(s, &io);
|
|
}
|
|
c->state &= ~CONFIG_LOCKED;
|
|
}
|
|
|
|
return CS_SUCCESS;
|
|
} /* release_configuration */
|
|
|
|
/*======================================================================
|
|
|
|
Release_io() releases the I/O ranges allocated by a client. This
|
|
may be invoked some time after a card ejection has already dumped
|
|
the actual socket configuration, so if the client is "stale", we
|
|
don't bother checking the port ranges against the current socket
|
|
values.
|
|
|
|
======================================================================*/
|
|
|
|
int pcmcia_release_io(client_handle_t handle, io_req_t *req)
|
|
{
|
|
struct pcmcia_socket *s;
|
|
|
|
if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IO_REQ))
|
|
return CS_BAD_HANDLE;
|
|
handle->state &= ~CLIENT_IO_REQ;
|
|
s = SOCKET(handle);
|
|
|
|
#ifdef CONFIG_CARDBUS
|
|
if (handle->state & CLIENT_CARDBUS)
|
|
return CS_SUCCESS;
|
|
#endif
|
|
|
|
if (!(handle->state & CLIENT_STALE)) {
|
|
config_t *c = CONFIG(handle);
|
|
if (c->state & CONFIG_LOCKED)
|
|
return CS_CONFIGURATION_LOCKED;
|
|
if ((c->io.BasePort1 != req->BasePort1) ||
|
|
(c->io.NumPorts1 != req->NumPorts1) ||
|
|
(c->io.BasePort2 != req->BasePort2) ||
|
|
(c->io.NumPorts2 != req->NumPorts2))
|
|
return CS_BAD_ARGS;
|
|
c->state &= ~CONFIG_IO_REQ;
|
|
}
|
|
|
|
release_io_space(s, req->BasePort1, req->NumPorts1);
|
|
if (req->NumPorts2)
|
|
release_io_space(s, req->BasePort2, req->NumPorts2);
|
|
|
|
return CS_SUCCESS;
|
|
} /* release_io */
|
|
|
|
/*====================================================================*/
|
|
|
|
int pcmcia_release_irq(client_handle_t handle, irq_req_t *req)
|
|
{
|
|
struct pcmcia_socket *s;
|
|
if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IRQ_REQ))
|
|
return CS_BAD_HANDLE;
|
|
handle->state &= ~CLIENT_IRQ_REQ;
|
|
s = SOCKET(handle);
|
|
|
|
if (!(handle->state & CLIENT_STALE)) {
|
|
config_t *c = CONFIG(handle);
|
|
if (c->state & CONFIG_LOCKED)
|
|
return CS_CONFIGURATION_LOCKED;
|
|
if (c->irq.Attributes != req->Attributes)
|
|
return CS_BAD_ATTRIBUTE;
|
|
if (s->irq.AssignedIRQ != req->AssignedIRQ)
|
|
return CS_BAD_IRQ;
|
|
if (--s->irq.Config == 0) {
|
|
c->state &= ~CONFIG_IRQ_REQ;
|
|
s->irq.AssignedIRQ = 0;
|
|
}
|
|
}
|
|
|
|
if (req->Attributes & IRQ_HANDLE_PRESENT) {
|
|
free_irq(req->AssignedIRQ, req->Instance);
|
|
}
|
|
|
|
#ifdef CONFIG_PCMCIA_PROBE
|
|
pcmcia_used_irq[req->AssignedIRQ]--;
|
|
#endif
|
|
|
|
return CS_SUCCESS;
|
|
} /* cs_release_irq */
|
|
|
|
/*====================================================================*/
|
|
|
|
int pcmcia_release_window(window_handle_t win)
|
|
{
|
|
struct pcmcia_socket *s;
|
|
|
|
if ((win == NULL) || (win->magic != WINDOW_MAGIC))
|
|
return CS_BAD_HANDLE;
|
|
s = win->sock;
|
|
if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
|
|
return CS_BAD_HANDLE;
|
|
|
|
/* Shut down memory window */
|
|
win->ctl.flags &= ~MAP_ACTIVE;
|
|
s->ops->set_mem_map(s, &win->ctl);
|
|
s->state &= ~SOCKET_WIN_REQ(win->index);
|
|
|
|
/* Release system memory */
|
|
if (win->ctl.res) {
|
|
release_resource(win->ctl.res);
|
|
kfree(win->ctl.res);
|
|
win->ctl.res = NULL;
|
|
}
|
|
win->handle->state &= ~CLIENT_WIN_REQ(win->index);
|
|
|
|
win->magic = 0;
|
|
|
|
return CS_SUCCESS;
|
|
} /* release_window */
|
|
|
|
/*====================================================================*/
|
|
|
|
int pcmcia_request_configuration(client_handle_t handle,
|
|
config_req_t *req)
|
|
{
|
|
int i;
|
|
u_int base;
|
|
struct pcmcia_socket *s;
|
|
config_t *c;
|
|
pccard_io_map iomap;
|
|
|
|
if (CHECK_HANDLE(handle))
|
|
return CS_BAD_HANDLE;
|
|
s = SOCKET(handle);
|
|
if (!(s->state & SOCKET_PRESENT))
|
|
return CS_NO_CARD;
|
|
|
|
#ifdef CONFIG_CARDBUS
|
|
if (handle->state & CLIENT_CARDBUS)
|
|
return CS_UNSUPPORTED_MODE;
|
|
#endif
|
|
|
|
if (req->IntType & INT_CARDBUS)
|
|
return CS_UNSUPPORTED_MODE;
|
|
c = CONFIG(handle);
|
|
if (c->state & CONFIG_LOCKED)
|
|
return CS_CONFIGURATION_LOCKED;
|
|
|
|
/* Do power control. We don't allow changes in Vcc. */
|
|
if (s->socket.Vcc != req->Vcc)
|
|
return CS_BAD_VCC;
|
|
if (req->Vpp1 != req->Vpp2)
|
|
return CS_BAD_VPP;
|
|
s->socket.Vpp = req->Vpp1;
|
|
if (s->ops->set_socket(s, &s->socket))
|
|
return CS_BAD_VPP;
|
|
|
|
c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
|
|
|
|
/* Pick memory or I/O card, DMA mode, interrupt */
|
|
c->IntType = req->IntType;
|
|
c->Attributes = req->Attributes;
|
|
if (req->IntType & INT_MEMORY_AND_IO)
|
|
s->socket.flags |= SS_IOCARD;
|
|
if (req->IntType & INT_ZOOMED_VIDEO)
|
|
s->socket.flags |= SS_ZVCARD | SS_IOCARD;
|
|
if (req->Attributes & CONF_ENABLE_DMA)
|
|
s->socket.flags |= SS_DMA_MODE;
|
|
if (req->Attributes & CONF_ENABLE_SPKR)
|
|
s->socket.flags |= SS_SPKR_ENA;
|
|
if (req->Attributes & CONF_ENABLE_IRQ)
|
|
s->socket.io_irq = s->irq.AssignedIRQ;
|
|
else
|
|
s->socket.io_irq = 0;
|
|
s->ops->set_socket(s, &s->socket);
|
|
s->lock_count++;
|
|
|
|
/* Set up CIS configuration registers */
|
|
base = c->ConfigBase = req->ConfigBase;
|
|
c->Present = c->CardValues = req->Present;
|
|
if (req->Present & PRESENT_COPY) {
|
|
c->Copy = req->Copy;
|
|
write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
|
|
}
|
|
if (req->Present & PRESENT_OPTION) {
|
|
if (s->functions == 1) {
|
|
c->Option = req->ConfigIndex & COR_CONFIG_MASK;
|
|
} else {
|
|
c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
|
|
c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
|
|
if (req->Present & PRESENT_IOBASE_0)
|
|
c->Option |= COR_ADDR_DECODE;
|
|
}
|
|
if (c->state & CONFIG_IRQ_REQ)
|
|
if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
|
|
c->Option |= COR_LEVEL_REQ;
|
|
write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
|
|
mdelay(40);
|
|
}
|
|
if (req->Present & PRESENT_STATUS) {
|
|
c->Status = req->Status;
|
|
write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
|
|
}
|
|
if (req->Present & PRESENT_PIN_REPLACE) {
|
|
c->Pin = req->Pin;
|
|
write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
|
|
}
|
|
if (req->Present & PRESENT_EXT_STATUS) {
|
|
c->ExtStatus = req->ExtStatus;
|
|
write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
|
|
}
|
|
if (req->Present & PRESENT_IOBASE_0) {
|
|
u_char b = c->io.BasePort1 & 0xff;
|
|
write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
|
|
b = (c->io.BasePort1 >> 8) & 0xff;
|
|
write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
|
|
}
|
|
if (req->Present & PRESENT_IOSIZE) {
|
|
u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
|
|
write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
|
|
}
|
|
|
|
/* Configure I/O windows */
|
|
if (c->state & CONFIG_IO_REQ) {
|
|
iomap.speed = io_speed;
|
|
for (i = 0; i < MAX_IO_WIN; i++)
|
|
if (s->io[i].NumPorts != 0) {
|
|
iomap.map = i;
|
|
iomap.flags = MAP_ACTIVE;
|
|
switch (s->io[i].Attributes & IO_DATA_PATH_WIDTH) {
|
|
case IO_DATA_PATH_WIDTH_16:
|
|
iomap.flags |= MAP_16BIT; break;
|
|
case IO_DATA_PATH_WIDTH_AUTO:
|
|
iomap.flags |= MAP_AUTOSZ; break;
|
|
default:
|
|
break;
|
|
}
|
|
iomap.start = s->io[i].BasePort;
|
|
iomap.stop = iomap.start + s->io[i].NumPorts - 1;
|
|
s->ops->set_io_map(s, &iomap);
|
|
s->io[i].Config++;
|
|
}
|
|
}
|
|
|
|
c->state |= CONFIG_LOCKED;
|
|
handle->state |= CLIENT_CONFIG_LOCKED;
|
|
return CS_SUCCESS;
|
|
} /* request_configuration */
|
|
|
|
/*======================================================================
|
|
|
|
Request_io() reserves ranges of port addresses for a socket.
|
|
I have not implemented range sharing or alias addressing.
|
|
|
|
======================================================================*/
|
|
|
|
int pcmcia_request_io(client_handle_t handle, io_req_t *req)
|
|
{
|
|
struct pcmcia_socket *s;
|
|
config_t *c;
|
|
|
|
if (CHECK_HANDLE(handle))
|
|
return CS_BAD_HANDLE;
|
|
s = SOCKET(handle);
|
|
if (!(s->state & SOCKET_PRESENT))
|
|
return CS_NO_CARD;
|
|
|
|
if (handle->state & CLIENT_CARDBUS) {
|
|
#ifdef CONFIG_CARDBUS
|
|
handle->state |= CLIENT_IO_REQ;
|
|
return CS_SUCCESS;
|
|
#else
|
|
return CS_UNSUPPORTED_FUNCTION;
|
|
#endif
|
|
}
|
|
|
|
if (!req)
|
|
return CS_UNSUPPORTED_MODE;
|
|
c = CONFIG(handle);
|
|
if (c->state & CONFIG_LOCKED)
|
|
return CS_CONFIGURATION_LOCKED;
|
|
if (c->state & CONFIG_IO_REQ)
|
|
return CS_IN_USE;
|
|
if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
|
|
return CS_BAD_ATTRIBUTE;
|
|
if ((req->NumPorts2 > 0) &&
|
|
(req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
|
|
return CS_BAD_ATTRIBUTE;
|
|
|
|
if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
|
|
req->NumPorts1, req->IOAddrLines))
|
|
return CS_IN_USE;
|
|
|
|
if (req->NumPorts2) {
|
|
if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
|
|
req->NumPorts2, req->IOAddrLines)) {
|
|
release_io_space(s, req->BasePort1, req->NumPorts1);
|
|
return CS_IN_USE;
|
|
}
|
|
}
|
|
|
|
c->io = *req;
|
|
c->state |= CONFIG_IO_REQ;
|
|
handle->state |= CLIENT_IO_REQ;
|
|
return CS_SUCCESS;
|
|
} /* request_io */
|
|
|
|
/*======================================================================
|
|
|
|
Request_irq() reserves an irq for this client.
|
|
|
|
Also, since Linux only reserves irq's when they are actually
|
|
hooked, we don't guarantee that an irq will still be available
|
|
when the configuration is locked. Now that I think about it,
|
|
there might be a way to fix this using a dummy handler.
|
|
|
|
======================================================================*/
|
|
|
|
#ifdef CONFIG_PCMCIA_PROBE
|
|
static irqreturn_t test_action(int cpl, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
return IRQ_NONE;
|
|
}
|
|
#endif
|
|
|
|
int pcmcia_request_irq(client_handle_t handle, irq_req_t *req)
|
|
{
|
|
struct pcmcia_socket *s;
|
|
config_t *c;
|
|
int ret = CS_IN_USE, irq = 0;
|
|
struct pcmcia_device *p_dev = handle_to_pdev(handle);
|
|
|
|
if (CHECK_HANDLE(handle))
|
|
return CS_BAD_HANDLE;
|
|
s = SOCKET(handle);
|
|
if (!(s->state & SOCKET_PRESENT))
|
|
return CS_NO_CARD;
|
|
c = CONFIG(handle);
|
|
if (c->state & CONFIG_LOCKED)
|
|
return CS_CONFIGURATION_LOCKED;
|
|
if (c->state & CONFIG_IRQ_REQ)
|
|
return CS_IN_USE;
|
|
|
|
#ifdef CONFIG_PCMCIA_PROBE
|
|
if (s->irq.AssignedIRQ != 0) {
|
|
/* If the interrupt is already assigned, it must be the same */
|
|
irq = s->irq.AssignedIRQ;
|
|
} else {
|
|
int try;
|
|
u32 mask = s->irq_mask;
|
|
void *data = NULL;
|
|
|
|
for (try = 0; try < 64; try++) {
|
|
irq = try % 32;
|
|
|
|
/* marked as available by driver, and not blocked by userspace? */
|
|
if (!((mask >> irq) & 1))
|
|
continue;
|
|
|
|
/* avoid an IRQ which is already used by a PCMCIA card */
|
|
if ((try < 32) && pcmcia_used_irq[irq])
|
|
continue;
|
|
|
|
/* register the correct driver, if possible, of check whether
|
|
* registering a dummy handle works, i.e. if the IRQ isn't
|
|
* marked as used by the kernel resource management core */
|
|
ret = request_irq(irq,
|
|
(req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
|
|
((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
|
|
(s->functions > 1) ||
|
|
(irq == s->pci_irq)) ? SA_SHIRQ : 0,
|
|
p_dev->dev.bus_id,
|
|
(req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
|
|
if (!ret) {
|
|
if (!(req->Attributes & IRQ_HANDLE_PRESENT))
|
|
free_irq(irq, data);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
if (ret) {
|
|
if (!s->pci_irq)
|
|
return ret;
|
|
irq = s->pci_irq;
|
|
}
|
|
|
|
if (ret && req->Attributes & IRQ_HANDLE_PRESENT) {
|
|
if (request_irq(irq, req->Handler,
|
|
((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) ||
|
|
(s->functions > 1) ||
|
|
(irq == s->pci_irq)) ? SA_SHIRQ : 0,
|
|
p_dev->dev.bus_id, req->Instance))
|
|
return CS_IN_USE;
|
|
}
|
|
|
|
c->irq.Attributes = req->Attributes;
|
|
s->irq.AssignedIRQ = req->AssignedIRQ = irq;
|
|
s->irq.Config++;
|
|
|
|
c->state |= CONFIG_IRQ_REQ;
|
|
handle->state |= CLIENT_IRQ_REQ;
|
|
|
|
#ifdef CONFIG_PCMCIA_PROBE
|
|
pcmcia_used_irq[irq]++;
|
|
#endif
|
|
|
|
return CS_SUCCESS;
|
|
} /* pcmcia_request_irq */
|
|
|
|
/*======================================================================
|
|
|
|
Request_window() establishes a mapping between card memory space
|
|
and system memory space.
|
|
|
|
======================================================================*/
|
|
|
|
int pcmcia_request_window(client_handle_t *handle, win_req_t *req, window_handle_t *wh)
|
|
{
|
|
struct pcmcia_socket *s;
|
|
window_t *win;
|
|
u_long align;
|
|
int w;
|
|
|
|
if (CHECK_HANDLE(*handle))
|
|
return CS_BAD_HANDLE;
|
|
s = (*handle)->Socket;
|
|
if (!(s->state & SOCKET_PRESENT))
|
|
return CS_NO_CARD;
|
|
if (req->Attributes & (WIN_PAGED | WIN_SHARED))
|
|
return CS_BAD_ATTRIBUTE;
|
|
|
|
/* Window size defaults to smallest available */
|
|
if (req->Size == 0)
|
|
req->Size = s->map_size;
|
|
align = (((s->features & SS_CAP_MEM_ALIGN) ||
|
|
(req->Attributes & WIN_STRICT_ALIGN)) ?
|
|
req->Size : s->map_size);
|
|
if (req->Size & (s->map_size-1))
|
|
return CS_BAD_SIZE;
|
|
if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
|
|
(req->Base & (align-1)))
|
|
return CS_BAD_BASE;
|
|
if (req->Base)
|
|
align = 0;
|
|
|
|
/* Allocate system memory window */
|
|
for (w = 0; w < MAX_WIN; w++)
|
|
if (!(s->state & SOCKET_WIN_REQ(w))) break;
|
|
if (w == MAX_WIN)
|
|
return CS_OUT_OF_RESOURCE;
|
|
|
|
win = &s->win[w];
|
|
win->magic = WINDOW_MAGIC;
|
|
win->index = w;
|
|
win->handle = *handle;
|
|
win->sock = s;
|
|
|
|
if (!(s->features & SS_CAP_STATIC_MAP)) {
|
|
win->ctl.res = find_mem_region(req->Base, req->Size, align,
|
|
(req->Attributes & WIN_MAP_BELOW_1MB), s);
|
|
if (!win->ctl.res)
|
|
return CS_IN_USE;
|
|
}
|
|
(*handle)->state |= CLIENT_WIN_REQ(w);
|
|
|
|
/* Configure the socket controller */
|
|
win->ctl.map = w+1;
|
|
win->ctl.flags = 0;
|
|
win->ctl.speed = req->AccessSpeed;
|
|
if (req->Attributes & WIN_MEMORY_TYPE)
|
|
win->ctl.flags |= MAP_ATTRIB;
|
|
if (req->Attributes & WIN_ENABLE)
|
|
win->ctl.flags |= MAP_ACTIVE;
|
|
if (req->Attributes & WIN_DATA_WIDTH_16)
|
|
win->ctl.flags |= MAP_16BIT;
|
|
if (req->Attributes & WIN_USE_WAIT)
|
|
win->ctl.flags |= MAP_USE_WAIT;
|
|
win->ctl.card_start = 0;
|
|
if (s->ops->set_mem_map(s, &win->ctl) != 0)
|
|
return CS_BAD_ARGS;
|
|
s->state |= SOCKET_WIN_REQ(w);
|
|
|
|
/* Return window handle */
|
|
if (s->features & SS_CAP_STATIC_MAP) {
|
|
req->Base = win->ctl.static_start;
|
|
} else {
|
|
req->Base = win->ctl.res->start;
|
|
}
|
|
*wh = win;
|
|
|
|
return CS_SUCCESS;
|
|
} /* request_window */
|
|
|
|
/*======================================================================
|
|
|
|
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 */
|
|
|
|
/*======================================================================
|
|
|
|
OS-specific module glue goes here
|
|
|
|
======================================================================*/
|
|
/* in alpha order */
|
|
EXPORT_SYMBOL(pcmcia_eject_card);
|
|
EXPORT_SYMBOL(pcmcia_get_card_services_info);
|
|
EXPORT_SYMBOL(pcmcia_get_mem_page);
|
|
EXPORT_SYMBOL(pcmcia_insert_card);
|
|
EXPORT_SYMBOL(pcmcia_map_mem_page);
|
|
EXPORT_SYMBOL(pcmcia_modify_configuration);
|
|
EXPORT_SYMBOL(pcmcia_release_configuration);
|
|
EXPORT_SYMBOL(pcmcia_release_io);
|
|
EXPORT_SYMBOL(pcmcia_release_irq);
|
|
EXPORT_SYMBOL(pcmcia_release_window);
|
|
EXPORT_SYMBOL(pcmcia_replace_cis);
|
|
EXPORT_SYMBOL(pcmcia_request_configuration);
|
|
EXPORT_SYMBOL(pcmcia_request_io);
|
|
EXPORT_SYMBOL(pcmcia_request_irq);
|
|
EXPORT_SYMBOL(pcmcia_request_window);
|
|
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",
|
|
.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);
|
|
|
|
/*====================================================================*/
|
|
|