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 triggering, int polarity)
{
	if (triggering == ACPI_LEVEL_SENSITIVE) {
		if (polarity == ACPI_ACTIVE_LOW)
			return IORESOURCE_IRQ_LOWLEVEL;
		else
			return IORESOURCE_IRQ_HIGHLEVEL;
	} else {
		if (polarity == ACPI_ACTIVE_LOW)
			return IORESOURCE_IRQ_LOWEDGE;
		else
			return IORESOURCE_IRQ_HIGHEDGE;
	}
}

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

static void pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res,
						u32 gsi, int triggering,
						int polarity, int shareable)
{
	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
	res->irq_resource[i].flags |= irq_flags(triggering, polarity);
	irq = acpi_register_gsi(gsi, triggering, polarity);
	if (irq < 0) {
		res->irq_resource[i].flags |= IORESOURCE_DISABLED;
		return;
	}

	if (shareable)
		res->irq_resource[i].flags |= IORESOURCE_IRQ_SHAREABLE;

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

static int dma_flags(int type, int bus_master, int transfer)
{
	int flags = 0;

	if (bus_master)
		flags |= IORESOURCE_DMA_MASTER;
	switch (type) {
	case ACPI_COMPATIBILITY:
		flags |= IORESOURCE_DMA_COMPATIBLE;
		break;
	case ACPI_TYPE_A:
		flags |= IORESOURCE_DMA_TYPEA;
		break;
	case ACPI_TYPE_B:
		flags |= IORESOURCE_DMA_TYPEB;
		break;
	case ACPI_TYPE_F:
		flags |= IORESOURCE_DMA_TYPEF;
		break;
	default:
		/* Set a default value ? */
		flags |= IORESOURCE_DMA_COMPATIBLE;
		pnp_err("Invalid DMA type");
	}
	switch (transfer) {
	case ACPI_TRANSFER_8:
		flags |= IORESOURCE_DMA_8BIT;
		break;
	case ACPI_TRANSFER_8_16:
		flags |= IORESOURCE_DMA_8AND16BIT;
		break;
	case ACPI_TRANSFER_16:
		flags |= IORESOURCE_DMA_16BIT;
		break;
	default:
		/* Set a default value ? */
		flags |= IORESOURCE_DMA_8AND16BIT;
		pnp_err("Invalid DMA transfer type");
	}

	return flags;
}

static void pnpacpi_parse_allocated_dmaresource(struct pnp_resource_table *res,
						u32 dma, int type,
						int bus_master, int transfer)
{
	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
		res->dma_resource[i].flags |=
		    dma_flags(type, bus_master, transfer);
		if (dma == -1) {
			res->dma_resource[i].flags |= IORESOURCE_DISABLED;
			return;
		}
		res->dma_resource[i].start = dma;
		res->dma_resource[i].end =