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/*
* rsrc_mgr.c -- Resource management routines and/or wrappers
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The initial developer of the original code is David A. Hinds
* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
*
* (C) 1999 David A. Hinds
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include "cs_internal.h"
#ifdef CONFIG_PCMCIA_PROBE
static int adjust_irq(struct pcmcia_socket *s, adjust_t *adj)
{
int irq;
u32 mask;
irq = adj->resource.irq.IRQ;
if ((irq < 0) || (irq > 15))
return CS_BAD_IRQ;
if (adj->Action != REMOVE_MANAGED_RESOURCE)
return 0;
mask = 1 << irq;
if (!(s->irq_mask & mask))
return 0;
s->irq_mask &= ~mask;
return 0;
}
#else
static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) {
return CS_SUCCESS;
}
#endif
int pcmcia_adjust_resource_info(adjust_t *adj)
{
struct pcmcia_socket *s;
int ret = CS_UNSUPPORTED_FUNCTION;
unsigned long flags;
down_read(&pcmcia_socket_list_rwsem);
list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
if (adj->Resource == RES_IRQ)
ret = adjust_irq(s, adj);
else if (s->resource_ops->adjust_resource) {
/* you can't use the old interface if the new
* one was used before */
spin_lock_irqsave(&s->lock, flags);
if ((s->resource_setup_new) &&
!(s->resource_setup_old)) {
spin_unlock_irqrestore(&s->lock, flags);
continue;
} else if (!(s->resource_setup_old))
s->resource_setup_old = 1;
spin_unlock_irqrestore(&s->lock, flags);
ret = s->resource_ops->adjust_resource(s, adj);
if (!ret) {
/* as there's no way we know this is the
* last call to adjust_resource_info, we
* always need to assume this is the latest
* one... */
spin_lock_irqsave(&s->lock, flags);
s->resource_setup_done = 1;
spin_unlock_irqrestore(&s->lock, flags);
}
}
}
up_read(&pcmcia_socket_list_rwsem);
return (ret);
}
EXPORT_SYMBOL(pcmcia_adjust_resource_info);
int pcmcia_validate_mem(struct pcmcia_socket *s)
{
if (s->resource_ops->validate_mem)
return s->resource_ops->validate_mem(s);
/* if there is no callback, we can assume that everything is OK */
return 0;
}
EXPORT_SYMBOL(pcmcia_validate_mem);
int pcmcia_adjust_io_region(struct resource *res, unsigned long r_start,
unsigned long r_end, struct pcmcia_socket *s)
{
if (s->resource_ops->adjust_io_region)
return s->resource_ops->adjust_io_region(res, r_start, r_end, s);
return -ENOMEM;
}
EXPORT_SYMBOL(pcmcia_adjust_io_region);
struct resource *pcmcia_find_io_region(unsigned long base, int num,
unsigned long align, struct pcmcia_socket *s)
{
if (s->resource_ops->find_io)
return s->resource_ops->find_io(base, num, align, s);
return NULL;
}
EXPORT_SYMBOL(pcmcia_find_io_region);
struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
int low, struct pcmcia_socket *s)
{
if (s->resource_ops->find_mem)
return s->resource_ops->find_mem(base, num, align, low, s);
return NULL;
}
EXPORT_SYMBOL(pcmcia_find_mem_region);
void release_resource_db(struct pcmcia_socket *s)
{
if (s->resource_ops->exit)
s->resource_ops->exit(s);
}
static int static_init(struct pcmcia_socket *s)
{
unsigned long flags;
/* the good thing about SS_CAP_STATIC_MAP sockets is
* that they don't need a resource database */
spin_lock_irqsave(&s->lock, flags);
s->resource_setup_done = 1;
spin_unlock_irqrestore(&s->lock, flags);
return 0;
}
struct pccard_resource_ops pccard_static_ops = {
.validate_mem = NULL,
.adjust_io_region = NULL,
.find_io = NULL,
.find_mem = NULL,
.adjust_resource = NULL,
.init = static_init,
.exit = NULL,
};
EXPORT_SYMBOL(pccard_static_ops);
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