path: root/drivers/pnp/pnpacpi/rsparser.c

/*
 * pnpacpi -- PnP ACPI driver
 *
 * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
 * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
 * 
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/pci.h>
#include "pnpacpi.h"

#ifdef CONFIG_IA64
#define valid_IRQ(i) (1)
#else
#define valid_IRQ(i) (((i) != 0) && ((i) != 2))
#endif

/*
 * Allocated Resources
 */
static int irq_flags(int edge_level, int active_high_low)
{
	int flag;
	if (edge_level == ACPI_LEVEL_SENSITIVE) {
		if(active_high_low == ACPI_ACTIVE_LOW)
			flag = IORESOURCE_IRQ_LOWLEVEL;
		else
			flag = IORESOURCE_IRQ_HIGHLEVEL;
	}
	else {
		if(active_high_low == ACPI_ACTIVE_LOW)
			flag = IORESOURCE_IRQ_LOWEDGE;
		else
			flag = IORESOURCE_IRQ_HIGHEDGE;
	}
	return flag;
}

static void decode_irq_flags(int flag, int *edge_level, int *active_high_low)
{
	switch (flag) {
	case IORESOURCE_IRQ_LOWLEVEL:
		*edge_level = ACPI_LEVEL_SENSITIVE;
		*active_high_low = ACPI_ACTIVE_LOW;
		break;
	case IORESOURCE_IRQ_HIGHLEVEL:	
		*edge_level = ACPI_LEVEL_SENSITIVE;
		*active_high_low = ACPI_ACTIVE_HIGH;
		break;
	case IORESOURCE_IRQ_LOWEDGE:
		*edge_level = ACPI_EDGE_SENSITIVE;
		*active_high_low = ACPI_ACTIVE_LOW;
		break;
	case IORESOURCE_IRQ_HIGHEDGE:
		*edge_level = ACPI_EDGE_SENSITIVE;
		*active_high_low = ACPI_ACTIVE_HIGH;
		break;
	}
}

static void
pnpacpi_parse_allocated_irqresource(struct pnp_resource_table * res, u32 gsi,
	int edge_level, int active_high_low)
{
	int i = 0;
	int irq;

	if (!valid_IRQ(gsi))
		return;

	while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) &&
			i < PNP_MAX_IRQ)
		i++;
	if (i >= PNP_MAX_IRQ)
		return;

	res->irq_resource[i].flags = IORESOURCE_IRQ;  // Also clears _UNSET flag
	irq = acpi_register_gsi(gsi, edge_level, active_high_low);
	if (irq < 0) {
		res->irq_resource[i].flags |= IORESOURCE_DISABLED;
		return;
	}

	res->irq_resource[i].start = irq;
	res->irq_resource[i].end = irq;
	pcibios_penalize_isa_irq(irq, 1);
}

static void
pnpacpi_parse_allocated_dmaresource(struct pnp_resource_table * res, u32 dma)
{
	int i = 0;
	while (i < PNP_MAX_DMA &&
			!(res->dma_resource[i].flags & IORESOURCE_UNSET))
		i++;
	if (i < PNP_MAX_DMA) {
		res->dma_resource[i].flags = IORESOURCE_DMA;  // Also clears _UNSET flag
		if (dma == -1) {
			res->dma_resource[i].flags |= IORESOURCE_DISABLED;
			return;
		}
		res->dma_resource[i].start = dma;
		res->dma_resource[i].end = dma;
	}
}

static void
pnpacpi_parse_allocated_ioresource(struct pnp_resource_table * res,
	u32 io, u32 len)
{
	int i = 0;
	while (!(res->port_resource[i].flags & IORESOURCE_UNSET) &&
			i < PNP_MAX_PORT)
		i++;
	if (i < PNP_MAX_PORT) {
		res->port_resource[i].flags = IORESOURCE_IO;  // Also clears _UNSET flag
		if (len <= 0 || (io + len -1) >= 0x10003) {
			res->port_resource[i].flags |= IORESOURCE_DISABLED;
			return;
		}
		res->port_resource[i].start = io;
		res->port_resource[i].end = io + len - 1;
	}
}

static void
pnpacpi_parse_allocated_memresource(struct pnp_resource_table * res,
	u64 mem, u64 len)
{
	int i = 0;
	while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) &&
			(i < PNP_MAX_MEM))
		i++;
	if (i < PNP_MAX_MEM) {
		res->mem_resource[i].flags = IORESOURCE_MEM;  // Also clears _UNSET flag
		if (len <= 0) {
			res->mem_resource[i].flags |= IORESOURCE_DISABLED;
			return;
		}
		res->mem_resource[i].start = mem;
		res->mem_resource[i].end = mem + len - 1;
	}
}


static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
	void *data)
{
	struct pnp_resource_table * res_table = (struct pnp_resource_table *)data;