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Diffstat (limited to 'arch/i386/pci/direct.c')
-rw-r--r--arch/i386/pci/direct.c302
1 files changed, 0 insertions, 302 deletions
diff --git a/arch/i386/pci/direct.c b/arch/i386/pci/direct.c
deleted file mode 100644
index 431c9a51b15..00000000000
--- a/arch/i386/pci/direct.c
+++ /dev/null
@@ -1,302 +0,0 @@
-/*
- * direct.c - Low-level direct PCI config space access
- */
-
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/dmi.h>
-#include "pci.h"
-
-/*
- * Functions for accessing PCI configuration space with type 1 accesses
- */
-
-#define PCI_CONF1_ADDRESS(bus, devfn, reg) \
- (0x80000000 | (bus << 16) | (devfn << 8) | (reg & ~3))
-
-int pci_conf1_read(unsigned int seg, unsigned int bus,
- unsigned int devfn, int reg, int len, u32 *value)
-{
- unsigned long flags;
-
- if ((bus > 255) || (devfn > 255) || (reg > 255)) {
- *value = -1;
- return -EINVAL;
- }
-
- spin_lock_irqsave(&pci_config_lock, flags);
-
- outl(PCI_CONF1_ADDRESS(bus, devfn, reg), 0xCF8);
-
- switch (len) {
- case 1:
- *value = inb(0xCFC + (reg & 3));
- break;
- case 2:
- *value = inw(0xCFC + (reg & 2));
- break;
- case 4:
- *value = inl(0xCFC);
- break;
- }
-
- spin_unlock_irqrestore(&pci_config_lock, flags);
-
- return 0;
-}
-
-int pci_conf1_write(unsigned int seg, unsigned int bus,
- unsigned int devfn, int reg, int len, u32 value)
-{
- unsigned long flags;
-
- if ((bus > 255) || (devfn > 255) || (reg > 255))
- return -EINVAL;
-
- spin_lock_irqsave(&pci_config_lock, flags);
-
- outl(PCI_CONF1_ADDRESS(bus, devfn, reg), 0xCF8);
-
- switch (len) {
- case 1:
- outb((u8)value, 0xCFC + (reg & 3));
- break;
- case 2:
- outw((u16)value, 0xCFC + (reg & 2));
- break;
- case 4:
- outl((u32)value, 0xCFC);
- break;
- }
-
- spin_unlock_irqrestore(&pci_config_lock, flags);
-
- return 0;
-}
-
-#undef PCI_CONF1_ADDRESS
-
-struct pci_raw_ops pci_direct_conf1 = {
- .read = pci_conf1_read,
- .write = pci_conf1_write,
-};
-
-
-/*
- * Functions for accessing PCI configuration space with type 2 accesses
- */
-
-#define PCI_CONF2_ADDRESS(dev, reg) (u16)(0xC000 | (dev << 8) | reg)
-
-static int pci_conf2_read(unsigned int seg, unsigned int bus,
- unsigned int devfn, int reg, int len, u32 *value)
-{
- unsigned long flags;
- int dev, fn;
-
- if ((bus > 255) || (devfn > 255) || (reg > 255)) {
- *value = -1;
- return -EINVAL;
- }
-
- dev = PCI_SLOT(devfn);
- fn = PCI_FUNC(devfn);
-
- if (dev & 0x10)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- spin_lock_irqsave(&pci_config_lock, flags);
-
- outb((u8)(0xF0 | (fn << 1)), 0xCF8);
- outb((u8)bus, 0xCFA);
-
- switch (len) {
- case 1:
- *value = inb(PCI_CONF2_ADDRESS(dev, reg));
- break;
- case 2:
- *value = inw(PCI_CONF2_ADDRESS(dev, reg));
- break;
- case 4:
- *value = inl(PCI_CONF2_ADDRESS(dev, reg));
- break;
- }
-
- outb(0, 0xCF8);
-
- spin_unlock_irqrestore(&pci_config_lock, flags);
-
- return 0;
-}
-
-static int pci_conf2_write(unsigned int seg, unsigned int bus,
- unsigned int devfn, int reg, int len, u32 value)
-{
- unsigned long flags;
- int dev, fn;
-
- if ((bus > 255) || (devfn > 255) || (reg > 255))
- return -EINVAL;
-
- dev = PCI_SLOT(devfn);
- fn = PCI_FUNC(devfn);
-
- if (dev & 0x10)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- spin_lock_irqsave(&pci_config_lock, flags);
-
- outb((u8)(0xF0 | (fn << 1)), 0xCF8);
- outb((u8)bus, 0xCFA);
-
- switch (len) {
- case 1:
- outb((u8)value, PCI_CONF2_ADDRESS(dev, reg));
- break;
- case 2:
- outw((u16)value, PCI_CONF2_ADDRESS(dev, reg));
- break;
- case 4:
- outl((u32)value, PCI_CONF2_ADDRESS(dev, reg));
- break;
- }
-
- outb(0, 0xCF8);
-
- spin_unlock_irqrestore(&pci_config_lock, flags);
-
- return 0;
-}
-
-#undef PCI_CONF2_ADDRESS
-
-static struct pci_raw_ops pci_direct_conf2 = {
- .read = pci_conf2_read,
- .write = pci_conf2_write,
-};
-
-
-/*
- * Before we decide to use direct hardware access mechanisms, we try to do some
- * trivial checks to ensure it at least _seems_ to be working -- we just test
- * whether bus 00 contains a host bridge (this is similar to checking
- * techniques used in XFree86, but ours should be more reliable since we
- * attempt to make use of direct access hints provided by the PCI BIOS).
- *
- * This should be close to trivial, but it isn't, because there are buggy
- * chipsets (yes, you guessed it, by Intel and Compaq) that have no class ID.
- */
-static int __init pci_sanity_check(struct pci_raw_ops *o)
-{
- u32 x = 0;
- int devfn;
-
- if (pci_probe & PCI_NO_CHECKS)
- return 1;
- /* Assume Type 1 works for newer systems.
- This handles machines that don't have anything on PCI Bus 0. */
- if (dmi_get_year(DMI_BIOS_DATE) >= 2001)
- return 1;
-
- for (devfn = 0; devfn < 0x100; devfn++) {
- if (o->read(0, 0, devfn, PCI_CLASS_DEVICE, 2, &x))
- continue;
- if (x == PCI_CLASS_BRIDGE_HOST || x == PCI_CLASS_DISPLAY_VGA)
- return 1;
-
- if (o->read(0, 0, devfn, PCI_VENDOR_ID, 2, &x))
- continue;
- if (x == PCI_VENDOR_ID_INTEL || x == PCI_VENDOR_ID_COMPAQ)
- return 1;
- }
-
- DBG(KERN_WARNING "PCI: Sanity check failed\n");
- return 0;
-}
-
-static int __init pci_check_type1(void)
-{
- unsigned long flags;
- unsigned int tmp;
- int works = 0;
-
- local_irq_save(flags);
-
- outb(0x01, 0xCFB);
- tmp = inl(0xCF8);
- outl(0x80000000, 0xCF8);
- if (inl(0xCF8) == 0x80000000 && pci_sanity_check(&pci_direct_conf1)) {
- works = 1;
- }
- outl(tmp, 0xCF8);
- local_irq_restore(flags);
-
- return works;
-}
-
-static int __init pci_check_type2(void)
-{
- unsigned long flags;
- int works = 0;
-
- local_irq_save(flags);
-
- outb(0x00, 0xCFB);
- outb(0x00, 0xCF8);
- outb(0x00, 0xCFA);
- if (inb(0xCF8) == 0x00 && inb(0xCFA) == 0x00 &&
- pci_sanity_check(&pci_direct_conf2)) {
- works = 1;
- }
-
- local_irq_restore(flags);
-
- return works;
-}
-
-void __init pci_direct_init(int type)
-{
- if (type == 0)
- return;
- printk(KERN_INFO "PCI: Using configuration type %d\n", type);
- if (type == 1)
- raw_pci_ops = &pci_direct_conf1;
- else
- raw_pci_ops = &pci_direct_conf2;
-}
-
-int __init pci_direct_probe(void)
-{
- struct resource *region, *region2;
-
- if ((pci_probe & PCI_PROBE_CONF1) == 0)
- goto type2;
- region = request_region(0xCF8, 8, "PCI conf1");
- if (!region)
- goto type2;
-
- if (pci_check_type1())
- return 1;
- release_resource(region);
-
- type2:
- if ((pci_probe & PCI_PROBE_CONF2) == 0)
- return 0;
- region = request_region(0xCF8, 4, "PCI conf2");
- if (!region)
- return 0;
- region2 = request_region(0xC000, 0x1000, "PCI conf2");
- if (!region2)
- goto fail2;
-
- if (pci_check_type2()) {
- printk(KERN_INFO "PCI: Using configuration type 2\n");
- raw_pci_ops = &pci_direct_conf2;
- return 2;
- }
-
- release_resource(region2);
- fail2:
- release_resource(region);
- return 0;
-}
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