path: root/drivers/pcmcia/pcmcia_resource.c

/*
 * PCMCIA 16-bit resource management functions
 *
 * 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.
 *
 * Copyright (C) 1999	     David A. Hinds
 * Copyright (C) 2004-2005   Dominik Brodowski
 *
 * 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.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/slab.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>

#include "cs_internal.h"


/* Access speed for IO windows */
static int io_speed;
module_param(io_speed, int, 0444);


#ifdef CONFIG_PCMCIA_PROBE
#include <asm/irq.h>
/* mask of IRQs already reserved by other cards, we should avoid using them */
static u8 pcmcia_used_irq[NR_IRQS];
#endif

static int pcmcia_adjust_io_region(struct resource *res, unsigned long start,
				   unsigned long end, struct pcmcia_socket *s)
{
	if (s->resource_ops->adjust_io_region)
		return s->resource_ops->adjust_io_region(res, start, end, s);
	return -ENOMEM;
}

static 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;
}

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;
}

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;
}


/** alloc_io_space
 *
 * Special stuff for managing IO windows, because they are scarce
 */

static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
			  unsigned int *base, unsigned int num, u_int lines)
{
	int i;
	unsigned int try, align;

	align = (*base) ? (lines ? 1<<lines : 0) : 1;
	if (align && (align < num)) {
		if (*base) {
			dev_dbg(&s->dev, "odd IO request: num %#x align %#x\n",
			       num, align);
			align = 0;
		} else
			while (align && (align < num))
				align <<= 1;
	}
	if (*base & ~(align-1)) {
		dev_dbg(&s->dev, "odd IO request: base %#x align %#x\n",
		       *base, align);
		align = 0;
	}
	if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
		</