rsparser.c

来自「LINUX 2.6.17.4的源码」· C语言 代码 · 共 941 行 · 第 1/2 页

/*
 * pnpacpi -- PnP ACPI driver
 *
 * Copyright (c) 2004 Matthieu Castet <[e-mail]>
 * Copyright (c) 2004 Li Shaohua <[e-mail]>
 *
 * 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)
{
	int flag;
	if (triggering == ACPI_LEVEL_SENSITIVE) {
		if(polarity == ACPI_ACTIVE_LOW)
			flag = IORESOURCE_IRQ_LOWLEVEL;
		else
			flag = IORESOURCE_IRQ_HIGHLEVEL;
	}
	else {
		if(polarity == ACPI_ACTIVE_LOW)
			flag = IORESOURCE_IRQ_LOWEDGE;
		else
			flag = IORESOURCE_IRQ_HIGHEDGE;
	}
	return flag;
}

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 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, triggering, polarity);
	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;
	int i;

	switch (res->type) {
	case ACPI_RESOURCE_TYPE_IRQ:
		/*
		 * Per spec, only one interrupt per descriptor is allowed in
		 * _CRS, but some firmware violates this, so parse them all.
		 */
		for (i = 0; i < res->data.irq.interrupt_count; i++) {
			pnpacpi_parse_allocated_irqresource(res_table,
				res->data.irq.interrupts[i],
				res->data.irq.triggering,
				res->data.irq.polarity);
		}
		break;

	case ACPI_RESOURCE_TYPE_DMA:
		if (res->data.dma.channel_count > 0)
			pnpacpi_parse_allocated_dmaresource(res_table,
					res->data.dma.channels[0]);
		break;

	case ACPI_RESOURCE_TYPE_IO:
		pnpacpi_parse_allocated_ioresource(res_table,
				res->data.io.minimum,
				res->data.io.address_length);
		break;

	case ACPI_RESOURCE_TYPE_START_DEPENDENT:
	case ACPI_RESOURCE_TYPE_END_DEPENDENT:
		break;

	case ACPI_RESOURCE_TYPE_FIXED_IO:
		pnpacpi_parse_allocated_ioresource(res_table,
				res->data.fixed_io.address,
				res->data.fixed_io.address_length);
		break;

	case ACPI_RESOURCE_TYPE_VENDOR:
		break;

	case ACPI_RESOURCE_TYPE_END_TAG:
		break;

	case ACPI_RESOURCE_TYPE_MEMORY24:
		pnpacpi_parse_allocated_memresource(res_table,
				res->data.memory24.minimum,
				res->data.memory24.address_length);
		break;
	case ACPI_RESOURCE_TYPE_MEMORY32:
		pnpacpi_parse_allocated_memresource(res_table,
				res->data.memory32.minimum,
				res->data.memory32.address_length);
		break;
	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
		pnpacpi_parse_allocated_memresource(res_table,
				res->data.fixed_memory32.address,
				res->data.fixed_memory32.address_length);
		break;
	case ACPI_RESOURCE_TYPE_ADDRESS16:
		pnpacpi_parse_allocated_memresource(res_table,
				res->data.address16.minimum,
				res->data.address16.address_length);
		break;
	case ACPI_RESOURCE_TYPE_ADDRESS32:
		pnpacpi_parse_allocated_memresource(res_table,
				res->data.address32.minimum,
				res->data.address32.address_length);
		break;
	case ACPI_RESOURCE_TYPE_ADDRESS64:
		pnpacpi_parse_allocated_memresource(res_table,
		res->data.address64.minimum,
		res->data.address64.address_length);
		break;

	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
		break;

	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
		for (i = 0; i < res->data.extended_irq.interrupt_count; i++) {
			pnpacpi_parse_allocated_irqresource(res_table,
				res->data.extended_irq.interrupts[i],
				res->data.extended_irq.triggering,
				res->data.extended_irq.polarity);
		}
		break;

	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
		break;

	default:
		pnp_warn("PnPACPI: unknown resource type %d", res->type);
		return AE_ERROR;
	}
			
	return AE_OK;
}

acpi_status pnpacpi_parse_allocated_resource(acpi_handle handle, struct pnp_resource_table * res)
{
	/* Blank the resource table values */
	pnp_init_resource_table(res);

	return acpi_walk_resources(handle, METHOD_NAME__CRS, pnpacpi_allocated_resource, res);
}

static void pnpacpi_parse_dma_option(struct pnp_option *option, struct acpi_resource_dma *p)
{
	int i;
	struct pnp_dma * dma;

	if (p->channel_count == 0)
		return;
	dma = kcalloc(1, sizeof(struct pnp_dma), GFP_KERNEL);
	if (!dma)
		return;

	for(i = 0; i < p->channel_count; i++)
		dma->map |= 1 << p->channels[i];
	dma->flags = 0;
	if (p->bus_master)
		dma->flags |= IORESOURCE_DMA_MASTER;
	switch (p->type) {
	case ACPI_COMPATIBILITY:
		dma->flags |= IORESOURCE_DMA_COMPATIBLE;
		break;
	case ACPI_TYPE_A:
		dma->flags |= IORESOURCE_DMA_TYPEA;
		break;
	case ACPI_TYPE_B:
		dma->flags |= IORESOURCE_DMA_TYPEB;
		break;
	case ACPI_TYPE_F:
		dma->flags |= IORESOURCE_DMA_TYPEF;
		break;
	default:
		/* Set a default value ? */
		dma->flags |= IORESOURCE_DMA_COMPATIBLE;
		pnp_err("Invalid DMA type");
	}
	switch (p->transfer) {
	case ACPI_TRANSFER_8:
		dma->flags |= IORESOURCE_DMA_8BIT;
		break;
	case ACPI_TRANSFER_8_16:
		dma->flags |= IORESOURCE_DMA_8AND16BIT;
		break;
	case ACPI_TRANSFER_16:
		dma->flags |= IORESOURCE_DMA_16BIT;
		break;
	default:
		/* Set a default value ? */
		dma->flags |= IORESOURCE_DMA_8AND16BIT;
		pnp_err("Invalid DMA transfer type");
	}

	pnp_register_dma_resource(option,dma);
	return;
}

	
static void pnpacpi_parse_irq_option(struct pnp_option *option,
	struct acpi_resource_irq *p)
{
	int i;
	struct pnp_irq * irq;
	
	if (p->interrupt_count == 0)
		return;
	irq = kcalloc(1, sizeof(struct pnp_irq), GFP_KERNEL);
	if (!irq)
		return;

	for(i = 0; i < p->interrupt_count; i++)
		if (p->interrupts[i])
			__set_bit(p->interrupts[i], irq->map);
	irq->flags = irq_flags(p->triggering, p->polarity);

	pnp_register_irq_resource(option, irq);
	return;
}

static void pnpacpi_parse_ext_irq_option(struct pnp_option *option,
	struct acpi_resource_extended_irq *p)
{
	int i;
	struct pnp_irq * irq;

	if (p->interrupt_count == 0)
		return;
	irq = kcalloc(1, sizeof(struct pnp_irq), GFP_KERNEL);
	if (!irq)
		return;

	for(i = 0; i < p->interrupt_count; i++)
		if (p->interrupts[i])
			__set_bit(p->interrupts[i], irq->map);
	irq->flags = irq_flags(p->triggering, p->polarity);

	pnp_register_irq_resource(option, irq);
	return;
}

static void
pnpacpi_parse_port_option(struct pnp_option *option,
	struct acpi_resource_io *io)
{
	struct pnp_port * port;

	if (io->address_length == 0)
		return;
	port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
	if (!port)
		return;
	port->min = io->minimum;
	port->max = io->maximum;
	port->align = io->alignment;
	port->size = io->address_length;
	port->flags = ACPI_DECODE_16 == io->io_decode ?
		PNP_PORT_FLAG_16BITADDR : 0;
	pnp_register_port_resource(option,port);
	return;
}

static void
pnpacpi_parse_fixed_port_option(struct pnp_option *option,
	struct acpi_resource_fixed_io *io)
{
	struct pnp_port * port;

	if (io->address_length == 0)
		return;
	port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
	if (!port)
		return;
	port->min = port->max = io->address;
	port->size = io->address_length;
	port->align = 0;
	port->flags = PNP_PORT_FLAG_FIXED;
	pnp_register_port_resource(option,port);
	return;
}

static void
pnpacpi_parse_mem24_option(struct pnp_option *option,
	struct acpi_resource_memory24 *p)
{
	struct pnp_mem * mem;

	if (p->address_length == 0)
		return;
	mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
	if (!mem)
		return;
	mem->min = p->minimum;
	mem->max = p->maximum;
	mem->align = p->alignment;
	mem->size = p->address_length;

	mem->flags = (ACPI_READ_WRITE_MEMORY == p->write_protect) ?
			IORESOURCE_MEM_WRITEABLE : 0;

	pnp_register_mem_resource(option,mem);
	return;
}

static void
pnpacpi_parse_mem32_option(struct pnp_option *option,
	struct acpi_resource_memory32 *p)
{
	struct pnp_mem * mem;

	if (p->address_length == 0)
		return;
	mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
	if (!mem)
		return;
	mem->min = p->minimum;
	mem->max = p->maximum;
	mem->align = p->alignment;
	mem->size = p->address_length;

	mem->flags = (ACPI_READ_WRITE_MEMORY == p->write_protect) ?
			IORESOURCE_MEM_WRITEABLE : 0;

	pnp_register_mem_resource(option,mem);
	return;
}

static void
pnpacpi_parse_fixed_mem32_option(struct pnp_option *option,
	struct acpi_resource_fixed_memory32 *p)
{
	struct pnp_mem * mem;

	if (p->address_length == 0)
		return;
	mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
	if (!mem)
		return;
	mem->min = mem->max = p->address;
	mem->size = p->address_length;
	mem->align = 0;

	mem->flags = (ACPI_READ_WRITE_MEMORY == p->write_protect) ?
			IORESOURCE_MEM_WRITEABLE : 0;

	pnp_register_mem_resource(option,mem);