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/*
* resource.c - Contains functions for registering and analyzing resource information
*
* based on isapnp.c resource management (c) Jaroslav Kysela <perex@suse.cz>
* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/pnp.h>
#include "base.h"
static int pnp_reserve_irq[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some IRQ */
static int pnp_reserve_dma[8] = { [0 ... 7] = -1 }; /* reserve (don't use) some DMA */
static int pnp_reserve_io[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some I/O region */
static int pnp_reserve_mem[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some memory region */
/*
* option registration
*/
static struct pnp_option * pnp_build_option(int priority)
{
struct pnp_option *option = pnp_alloc(sizeof(struct pnp_option));
/* check if pnp_alloc ran out of memory */
if (!option)
return NULL;
option->priority = priority & 0xff;
/* make sure the priority is valid */
if (option->priority > PNP_RES_PRIORITY_FUNCTIONAL)
option->priority = PNP_RES_PRIORITY_INVALID;
return option;
}
struct pnp_option * pnp_register_independent_option(struct pnp_dev *dev)
{
struct pnp_option *option;
if (!dev)
return NULL;
option = pnp_build_option(PNP_RES_PRIORITY_PREFERRED);
/* this should never happen but if it does we'll try to continue */
if (dev->independent)
pnp_err("independent resource already registered");
dev->independent = option;
return option;
}
struct pnp_option * pnp_register_dependent_option(struct pnp_dev *dev, int priority)
{
struct pnp_option *option;
if (!dev)
return NULL;
option = pnp_build_option(priority);
if (dev->dependent) {
struct pnp_option *parent = dev->dependent;
while (parent->next)
parent = parent->next;
parent->next = option;
} else
dev->dependent = option;
return option;
}
int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data)
{
struct pnp_irq *ptr;
if (!option)
return -EINVAL;
if (!data)
return -EINVAL;
ptr = option->irq;
while (ptr && ptr->next)
ptr = ptr->next;
if (ptr)
ptr->next = data;
else
option->irq = data;
#ifdef CONFIG_PCI
{
int i;
for (i = 0; i < 16; i++)
if (test_bit(i, data->map))
pcibios_penalize_isa_irq(i, 0);
}
#endif
return 0;
}
int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data)
{
struct pnp_dma *ptr;
if (!option)
return -EINVAL;
if (!data)
return -EINVAL;
ptr = option->dma;
while (ptr && ptr->next)
ptr = ptr->next;
if (ptr)
ptr->next = data;
else
option->dma = data;
return 0;
}
int pnp_register_port_resource(struct pnp_option *option, struct pnp_port *data)
{
struct pnp_port *ptr;
if (!option)
return -EINVAL;
if (!data)
return -EINVAL;
ptr = option->port;
while (ptr && ptr->next)
ptr = ptr->next;
if (ptr)
ptr->next = data;
else
option->port = data;
return 0;
}
int pnp_register_mem_resource(struct pnp_option *option, struct pnp_mem *data)
{
struct pnp_mem *ptr;
if (!option)
return -EINVAL;
if (!data)
return -EINVAL;
ptr = option->mem;
while (ptr && ptr->next)
ptr = ptr->next;
if (ptr)
ptr->next = data;
else
option->mem = data;
return 0;
}
static void pnp_free_port(struct pnp_port *port)
{
struct pnp_port *next;
while (port) {
next = port->next;
kfree(port);
port = next;
}
}
static void pnp_free_irq(struct pnp_irq *irq)
{
struct pnp_irq *next;
while (irq) {
next = irq->next;
kfree(irq);
irq = next;
}
}
static void pnp_free_dma(struct pnp_dma *dma)
{
struct pnp_dma *next;
while (dma) {
next = dma->next;
kfree(dma);
dma = next;
}
}
static void pnp_free_mem(struct pnp_mem *mem)
{
struct pnp_mem *next;
while (mem) {
next = mem->next;
kfree(mem);
mem = next;
}
}
void pnp_free_option(struct pnp_option *option)
{
struct pnp_option *next;
while (option) {
next = option->next;
pnp_free_port(option->port);
pnp_free_irq(option->irq);
pnp_free_dma(option->dma);
pnp_free_mem(option->mem);
kfree(option);
option = next;
}
}
/*
* resource validity checking
*/
#define length(start, end) (*(end) - *(start) + 1)
/* Two ranges conflict if one doesn't end before the other starts */
#define ranged_conflict(starta, enda, startb, endb) \
!((*(enda) < *(startb)) || (*(endb) < *(starta)))
#define cannot_compare(flags) \
((flags) & (IORESOURCE_UNSET | IORESOURCE_DISABLED))
int pnp_check_port(struct pnp_dev * dev, int idx)
{
int tmp;
struct pnp_dev *tdev;
unsigned long *port, *end, *tport, *tend;
port = &dev->res.port_resource[idx].start;
end = &dev->res.port_resource[idx].end;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(dev->res.port_resource[idx].flags))
return 1;
/* check if the resource is already in use, skip if the
* device is active because it itself may be in use */
if(!dev->active) {
if (__check_region(&ioport_resource, *port, length(port,end)))
return 0;
}
/* check if the resource is reserved */
for (tmp = 0; tmp
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