/*
* 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;
}
printk(KERN_INFO "pnp: AWE32 quirk - adding two ports\n");
}
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;
}
printk(KERN_INFO "pnp: CMI8330 quirk - fixing interrupts and dma\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)
printk(KERN_INFO
"pnp: SB audio device quirk - increasing port range\n");
}
#include <linux/pci.h>
static void quirk_system_pci_resources(struct pnp_dev *dev)
{
struct pci_dev *pdev = NULL;
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; j < PNP_MAX_MEM; j++) {
if (!pnp_mem_valid(dev, j) ||
pnp_mem_len(dev, j) == 0)
continue;
pnp_start = pnp_mem_start(dev, j);
pnp_end = pnp_mem_end(dev, j);
/*
* 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);
pnp_mem_flags(dev, j) = 0;
}
}
}
}
/*
* 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},
{"PNP0c01", quirk_system_pci_resources},
{"PNP0c02", quirk_system_pci_resources},
{""}
};
void pnp_fixup_device(struct pnp_dev *dev)
{
int i = 0;
void (*quirk)(struct pnp_dev *);
while (*pnp_fixups[i].id) {
if (compare_pnp_id(dev->id, pnp_fixups[i].id)) {
quirk = pnp_fixups[i].quirk_function;
#ifdef DEBUG
dev_dbg(&dev->dev, "calling quirk 0x%p", quirk);
print_fn_descriptor_symbol(": %s()\n",
(unsigned long) *quirk);
#endif
(*quirk)(dev);
}
i++;
}
}
