- 根目录:
- drivers
- pnp
- quirks.c
/*
* This file contains quirk handling code for PnP devices
* Some devices do not report all their resources, and need to have extra
* resources added. This is most easily accomplished at initialisation time
* when building up the resource structure for the first time.
*
* Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
* Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
* Bjorn Helgaas <bjorn.helgaas@hp.com>
*
* Heavily based on PCI quirks handling which is
*
* Copyright (c) 1999 Martin Mares <mj@ucw.cz>
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/pnp.h>
#include <linux/io.h>
#include <linux/kallsyms.h>
#include "base.h"
static void quirk_awe32_add_ports(struct pnp_dev *dev,
struct pnp_option *option,
unsigned int offset)
{
struct pnp_option *new_option;
new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL);
if (!new_option) {
dev_err(&dev->dev, "couldn't add ioport region to option set "
"%d\n", pnp_option_set(option));
return;
}
*new_option = *option;
new_option->u.port.min += offset;
new_option->u.port.max += offset;
list_add(&new_option->list, &option->list);
dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n",
(unsigned long long) new_option->u.port.min,
(unsigned long long) new_option->u.port.max,
pnp_option_set(option));
}
static void quirk_awe32_resources(struct pnp_dev *dev)
{
struct pnp_option *option;
unsigned int set = ~0;
/*
* Add two extra ioport regions (at offset 0x400 and 0x800 from the
* one given) to every dependent option set.
*/
list_for_each_entry(option, &dev->options, list) {
if (pnp_option_is_dependent(option) &&
pnp_option_set(option) != set) {
set = pnp_option_set(option);
quirk_awe32_add_ports(dev, option, 0x800);
quirk_awe32_add_ports(dev, option, 0x400);
}
}
}
static void quirk_cmi8330_resources(struct pnp_dev *dev)
{
struct pnp_option *option;
struct pnp_irq *irq;
struct pnp_dma *dma;
list_for_each_entry(option, &dev->options, list) {
if (!pnp_option_is_dependent(option))
continue;
if (option->type == IORESOURCE_IRQ) {
irq = &option->u.irq;
bitmap_zero(irq->map.bits, PNP_IRQ_NR);
__set_bit(5, irq->map.bits);
__set_bit(7, irq->map.bits);
__set_bit(10, irq->map.bits);
dev_info(&dev->dev, "set possible IRQs in "
"option set %d to 5, 7, 10\n",
pnp_option_set(option));
} else if (option->type == IORESOURCE_DMA) {
dma = &option->u.dma;
if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
IORESOURCE_DMA_8BIT &&
dma->map != 0x0A) {
dev_info(&dev->dev, "changing possible "
"DMA channel mask in option set %d "
"from %#02x to 0x0A (1, 3)\n",
pnp_option_set(option), dma->map);
dma->map = 0x0A;
}
}
}
}
static void quirk_sb16audio_resources(struct pnp_dev *dev)
{
struct pnp_option *option;
unsigned int prev_option_flags = ~0, n = 0;
struct pnp_port *port;
/*
* The default range on the OPL port for these devices is 0x388-0x388.
* Here we increase that range so that two such cards can be
* auto-configured.
*/
list_for_each_entry(option, &dev->options, list) {
if (prev_option_flags != option->flags) {
prev_option_flags = option->flags;
n = 0;
}
if (pnp_option_is_dependent(option) &&
option->type == IORESOURCE_IO) {
n++;
port = &option->u.port;
if (n == 3 && port->min == port->max) {
port->max += 0x70;
dev_info(&dev->dev, "increased option port "
"range from %#llx-%#llx to "
"%#llx-%#llx\n",
(unsigned long long) port->min,
(unsigned long long) port->min,
(unsigned long long) port->min,
(unsigned long long) port->max);
}
}
}
}
static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev,
unsigned int set)
{
struct pnp_option *tail = NULL, *first_new_option = NULL;
struct pnp_option *option, *new_option;
unsigned int flags;
list_for_each_entry(option, &dev->options, list) {
if (pnp_option_is_dependent(option))
tail = option;
}
if (!tail) {
dev_err(&dev->dev, "no dependent option sets\n");
return NULL;
}
flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL);
list_for_each_entry(option, &dev->options, list) {
if (pnp_option_is_dependent(option) &&
pnp_option_set(option) == set) {
new_option = kmalloc(sizeof(struct pnp_option),
GFP_KERNEL);
if (!new_option) {
dev_err(&dev->dev, "couldn't clone dependent "
"set %d\n", set);
return NULL;
}
*new_option = *option;
new_option->flags = flags;
if (!first_new_option)
first_new_option = new_option;
list_add(&new_option->list, &tail->list);
tail = new_option;
}
}
return first_new_option;
}
static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev)
{
struct pnp_option *new_option;
unsigned int num_sets, i, set;
struct pnp_irq *irq;
num_sets = dev->num_dependent_sets;
for (i = 0; i < num_sets; i++) {
new_option = pnp_clone_dependent_set(dev, i);
if (!new_option)
return;
set = pnp_option_set(new_option);
while (new_option && pnp_option_set(new_option) == set) {
if (new_option->type == IORESOURCE_IRQ) {
irq = &new_option->u.irq;
irq->flags |= IORESOURCE_IRQ_OPTIONAL;
}
dbg_pnp_show_option(dev, new_option);
new_option = list_entry(new_option->list.next,
struct pnp_option, list);
}
dev_info(&dev->dev, "added dependent option set %d (same as "
"set %d except IRQ optional)\n", set, i);
}
}
static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
{
struct pnp_option *option;
struct pnp_irq *irq = NULL;
unsigned int independent_irqs = 0;
list_for_each_entry(option, &dev->options, list) {
if (option->type == IORESOURCE_IRQ &&
!pnp_option_is_dependent(option)) {
independent_irqs++;
irq = &option->u.irq;
}
}
if (independent_irqs != 1)
return;
irq->flags |= IORESOURCE_IRQ_OPTIONAL;
dev_info(&dev->dev, "made independent IRQ optional\n");
}
#include <linux/pci.h>
static void quirk_system_pci_resources(struct pnp_dev *dev)
{
struct pci_dev *pdev = NULL;
struct resource *res;
resource_size_t pnp_start, pnp_end, pci_start, pci_end;
int i, j;
/*
* Some BIOSes have PNP motherboard devices with resources that
* partially overlap PCI BARs. The PNP system driver claims these
* motherboard resources, which prevents the normal PCI driver from
* requesting them later.
*
* This patch disables the PNP resources that conflict with PCI BARs
* so they won't be claimed by the PNP system driver.
*/
for_each_pci_dev(pdev) {
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
unsigned long type;
type = pci_resource_flags(pdev, i) &
(IORESOURCE_IO | IORESOURCE_MEM);
if (!type || pci_resource_len(pdev, i) == 0)
continue;
pci_start = pci_resource_start(pdev, i);
pci_end = pci_resource_end(pdev, i);
for (j = 0;
(res = pnp_get_resource(dev, type, j)); j++) {
if (res->start == 0 && res->end == 0)
continue;
pnp_start = res->start;
pnp_end = res->end;
/*
* If the PNP region doesn't overlap the PCI
* region at all, there's no problem.
*/
if (pnp_end < pci_start || pnp_start > pci_end)
continue;
/*
* If the PNP region completely encloses (or is
* at least as large as) the PCI region, that's
* also OK. For example, this happens when the
* PNP device describes a bridge with PCI
* behind it.
*/
if (pnp_start <= pci_start &&
pnp_end >= pci_end)
continue;
/*
* Otherwise, the PNP region overlaps *part* of
* the PCI region, and that might prevent a PCI
* driver from requesting its resources.
*/
dev_warn(&dev->dev,
"disabling %pR because it overlaps "
"%s BAR %d %pR\n", res,
pci_name(pdev), i, &pdev->resource[i]);
res->flags |= IORESOURCE_DISABLED;
}
}
}
}
/*
* PnP Quirks
* Cards or devices that need some tweaking due to incomplete resource info
*/
static struct pnp_fixup pnp_fixups[] = {
/* Soundblaster awe io port quirk */
{"CTL0021", quirk_awe32_resources},
{"CTL0022", quirk_awe32_resources},
{"CTL0023", quirk_awe32_resources},
/* CMI 8330 interrupt and dma fix */
{"@X@0001", quirk_cmi8330_resources},
/* Soundblaster audio device io port range quirk */
{"CTL0001", quirk_sb16audio_resources},
{"CTL0031", quirk_sb16audio_resources},
{"CTL0041", quirk_sb16audio_resources},
{"CTL0042", quirk_sb16audio_resources},
{"CTL0043", quirk_sb16audio_resources},
{"CTL0044", quirk_sb16audio_resources},
{"CTL0045", quirk_sb16audio_resources},
/* Add IRQ-optional MPU options */
{"ADS7151", quirk_ad1815_mpu_resources},
{"ADS7181", quirk_add_irq_optional_dependent_sets},
{"AZT0002", quirk_add_irq_optional_dependent_sets},
/* PnP resources that might overlap PCI BARs */
{"PNP0c01", quirk_system_pci_resources},
{"PNP0c02", quirk_system_pci_resources},
{""}
};
void pnp_fixup_device(struct pnp_dev *dev)
{
struct pnp_fixup *f;
for (f = pnp_fixups; *f->id; f++) {
if (!compare_pnp_id(dev->id, f->id))
continue;
pnp_dbg(&dev->dev, "%s: calling %pF\n", f->id,
f->quirk_function);
f->quirk_function(dev);
}
}