kernel-ark/drivers/pnp/quirks.c
Bjorn Helgaas 4b34fe1564 PNP: mark resources that conflict with PCI devices "disabled"
Both the PNP/PCI conflict detection quirk and the PNP system
driver must use the same mechanism to mark resources as disabled.

I think it's best to keep the resource and to keep the type bit
(IORESOURCE_MEM, etc), so that we match the list from firmware
as closely as possible.

Fixes this regression from 2.6.25: http://lkml.org/lkml/2008/6/1/82

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Tested-by: Avuton Olrich <avuton@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-02 15:59:06 -07:00

339 lines
8.0 KiB
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>
*
* 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_resources(struct pnp_dev *dev)
{
struct pnp_port *port, *port2, *port3;
struct pnp_option *res = dev->dependent;
/*
* Unfortunately the isapnp_add_port_resource is too tightly bound
* into the PnP discovery sequence, and cannot be used. Link in the
* two extra ports (at offset 0x400 and 0x800 from the one given) by
* hand.
*/
for (; res; res = res->next) {
port2 = pnp_alloc(sizeof(struct pnp_port));
if (!port2)
return;
port3 = pnp_alloc(sizeof(struct pnp_port));
if (!port3) {
kfree(port2);
return;
}
port = res->port;
memcpy(port2, port, sizeof(struct pnp_port));
memcpy(port3, port, sizeof(struct pnp_port));
port->next = port2;
port2->next = port3;
port2->min += 0x400;
port2->max += 0x400;
port3->min += 0x800;
port3->max += 0x800;
dev_info(&dev->dev,
"AWE32 quirk - added ioports 0x%lx and 0x%lx\n",
(unsigned long)port2->min,
(unsigned long)port3->min);
}
}
static void quirk_cmi8330_resources(struct pnp_dev *dev)
{
struct pnp_option *res = dev->dependent;
unsigned long tmp;
for (; res; res = res->next) {
struct pnp_irq *irq;
struct pnp_dma *dma;
for (irq = res->irq; irq; irq = irq->next) { // Valid irqs are 5, 7, 10
tmp = 0x04A0;
bitmap_copy(irq->map, &tmp, 16); // 0000 0100 1010 0000
}
for (dma = res->dma; dma; dma = dma->next) // Valid 8bit dma channels are 1,3
if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
IORESOURCE_DMA_8BIT)
dma->map = 0x000A;
}
dev_info(&dev->dev, "CMI8330 quirk - forced possible IRQs to 5, 7, 10 "
"and DMA channels to 1, 3\n");
}
static void quirk_sb16audio_resources(struct pnp_dev *dev)
{
struct pnp_port *port;
struct pnp_option *res = dev->dependent;
int changed = 0;
/*
* The default range on the mpu port for these devices is 0x388-0x388.
* Here we increase that range so that two such cards can be
* auto-configured.
*/
for (; res; res = res->next) {
port = res->port;
if (!port)
continue;
port = port->next;
if (!port)
continue;
port = port->next;
if (!port)
continue;
if (port->min != port->max)
continue;
port->max += 0x70;
changed = 1;
}
if (changed)
dev_info(&dev->dev, "SB audio device quirk - increased port range\n");
}
static struct pnp_option *quirk_isapnp_mpu_options(struct pnp_dev *dev)
{
struct pnp_option *head = NULL;
struct pnp_option *prev = NULL;
struct pnp_option *res;
/*
* Build a functional IRQ-less variant of each MPU option.
*/
for (res = dev->dependent; res; res = res->next) {
struct pnp_option *curr;
struct pnp_port *port;
struct pnp_port *copy;
port = res->port;
if (!port || !res->irq)
continue;
copy = pnp_alloc(sizeof *copy);
if (!copy)
break;
copy->min = port->min;
copy->max = port->max;
copy->align = port->align;
copy->size = port->size;
copy->flags = port->flags;
curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL);
if (!curr) {
kfree(copy);
break;
}
curr->port = copy;
if (prev)
prev->next = curr;
else
head = curr;
prev = curr;
}
if (head)
dev_info(&dev->dev, "adding IRQ-less MPU options\n");
return head;
}
static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
{
struct pnp_option *res;
struct pnp_irq *irq;
/*
* Distribute the independent IRQ over the dependent options
*/
res = dev->independent;
if (!res)
return;
irq = res->irq;
if (!irq || irq->next)
return;
res = dev->dependent;
if (!res)
return;
while (1) {
struct pnp_irq *copy;
copy = pnp_alloc(sizeof *copy);
if (!copy)
break;
memcpy(copy->map, irq->map, sizeof copy->map);
copy->flags = irq->flags;
copy->next = res->irq; /* Yes, this is NULL */
res->irq = copy;
if (!res->next)
break;
res = res->next;
}
kfree(irq);
res->next = quirk_isapnp_mpu_options(dev);
res = dev->independent;
res->irq = NULL;
}
static void quirk_isapnp_mpu_resources(struct pnp_dev *dev)
{
struct pnp_option *res;
res = dev->dependent;
if (!res)
return;
while (res->next)
res = res->next;
res->next = quirk_isapnp_mpu_options(dev);
}
#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++) {
if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
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, IORESOURCE_MEM, j));
j++) {
if (res->flags & IORESOURCE_UNSET ||
(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, "mem resource "
"(0x%llx-0x%llx) overlaps %s BAR %d "
"(0x%llx-0x%llx), disabling\n",
(unsigned long long) pnp_start,
(unsigned long long) pnp_end,
pci_name(pdev), i,
(unsigned long long) pci_start,
(unsigned long long) pci_end);
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-less MPU options */
{"ADS7151", quirk_ad1815_mpu_resources},
{"ADS7181", quirk_isapnp_mpu_resources},
{"AZT0002", quirk_isapnp_mpu_resources},
/* 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;
#ifdef DEBUG
dev_dbg(&dev->dev, "%s: calling ", f->id);
print_fn_descriptor_symbol("%s\n", f->quirk_function);
#endif
f->quirk_function(dev);
}
}