linux/drivers/pnp/quirks.c

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/*
* 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.bits, &tmp, 16);
}
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;
/*
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* Build a functional IRQ-optional variant of each MPU option.
*/
for (res = dev->dependent; res; res = res->next) {
struct pnp_option *curr;
struct pnp_port *port;
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struct pnp_port *copy_port;
struct pnp_irq *irq;
struct pnp_irq *copy_irq;
port = res->port;
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irq = res->irq;
if (!port || !irq)
continue;
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copy_port = pnp_alloc(sizeof *copy_port);
if (!copy_port)
break;
copy_irq = pnp_alloc(sizeof *copy_irq);
if (!copy_irq) {
kfree(copy_port);
break;
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}
*copy_port = *port;
copy_port->next = NULL;
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*copy_irq = *irq;
copy_irq->flags |= IORESOURCE_IRQ_OPTIONAL;
copy_irq->next = NULL;
curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL);
if (!curr) {
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kfree(copy_port);
kfree(copy_irq);
break;
}
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curr->port = copy_port;
curr->irq = copy_irq;
if (prev)
prev->next = curr;
else
head = curr;
prev = curr;
}
if (head)
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dev_info(&dev->dev, "adding IRQ-optional MPU options\n");
return head;
}
static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
{
struct pnp_option *res;
struct pnp_irq *irq;
res = dev->independent;
if (!res)
return;
irq = res->irq;
if (!irq || irq->next)
return;
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irq->flags |= IORESOURCE_IRQ_OPTIONAL;
dev_info(&dev->dev, "made independent IRQ optional\n");
}
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++) {
PNP: replace pnp_resource_table with dynamically allocated resources PNP used to have a fixed-size pnp_resource_table for tracking the resources used by a device. This table often overflowed, so we've had to increase the table size, which wastes memory because most devices have very few resources. This patch replaces the table with a linked list of resources where the entries are allocated on demand. This removes messages like these: pnpacpi: exceeded the max number of IO resources 00:01: too many I/O port resources References: http://bugzilla.kernel.org/show_bug.cgi?id=9535 http://bugzilla.kernel.org/show_bug.cgi?id=9740 http://lkml.org/lkml/2007/11/30/110 This patch also changes the way PNP uses the IORESOURCE_UNSET, IORESOURCE_AUTO, and IORESOURCE_DISABLED flags. Prior to this patch, the pnp_resource_table entries used the flags like this: IORESOURCE_UNSET This table entry is unused and available for use. When this flag is set, we shouldn't look at anything else in the resource structure. This flag is set when a resource table entry is initialized. IORESOURCE_AUTO This resource was assigned automatically by pnp_assign_{io,mem,etc}(). This flag is set when a resource table entry is initialized and cleared whenever we discover a resource setting by reading an ISAPNP config register, parsing a PNPBIOS resource data stream, parsing an ACPI _CRS list, or interpreting a sysfs "set" command. Resources marked IORESOURCE_AUTO are reinitialized and marked as IORESOURCE_UNSET by pnp_clean_resource_table() in these cases: - before we attempt to assign resources automatically, - if we fail to assign resources automatically, - after disabling a device IORESOURCE_DISABLED Set by pnp_assign_{io,mem,etc}() when automatic assignment fails. Also set by PNPBIOS and PNPACPI for: - invalid IRQs or GSI registration failures - invalid DMA channels - I/O ports above 0x10000 - mem ranges with negative length After this patch, there is no pnp_resource_table, and the resource list entries use the flags like this: IORESOURCE_UNSET This flag is no longer used in PNP. Instead of keeping IORESOURCE_UNSET entries in the resource list, we remove entries from the list and free them. IORESOURCE_AUTO No change in meaning: it still means the resource was assigned automatically by pnp_assign_{port,mem,etc}(), but these functions now set the bit explicitly. We still "clean" a device's resource list in the same places, but rather than reinitializing IORESOURCE_AUTO entries, we just remove them from the list. Note that IORESOURCE_AUTO entries are always at the end of the list, so removing them doesn't reorder other list entries. This is because non-IORESOURCE_AUTO entries are added by the ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the sysfs "set" command. In each of these cases, we completely free the resource list first. IORESOURCE_DISABLED In addition to the cases where we used to set this flag, ISAPNP now adds an IORESOURCE_DISABLED resource when it reads a configuration register with a "disabled" value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
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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, "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);
}
}