85a053fa5f
Fixups are executed once the pci-device is found which is during boot process so __init seems fine as long as the platform does not support hotplug. However it is possible to remove the PCI bus at run time and have it rediscovered again via "echo 1 > /sys/bus/pci/rescan" and this will call the fixups again. [ralf@linux-mips.org: Made piixirqmap[] in malta_piix_func0_fixup() __initdata.] Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Cc: linux-mips@linux-mips.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
#include <linux/init.h>
|
|
#include <linux/pci.h>
|
|
|
|
/* PCI interrupt pins */
|
|
#define PCIA 1
|
|
#define PCIB 2
|
|
#define PCIC 3
|
|
#define PCID 4
|
|
|
|
/* This table is filled in by interrogating the PIIX4 chip */
|
|
static char pci_irq[5] __initdata;
|
|
|
|
static char irq_tab[][5] __initdata = {
|
|
/* INTA INTB INTC INTD */
|
|
{0, 0, 0, 0, 0 }, /* 0: GT64120 PCI bridge */
|
|
{0, 0, 0, 0, 0 }, /* 1: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 2: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 3: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 4: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 5: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 6: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 7: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 8: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 9: Unused */
|
|
{0, 0, 0, 0, PCID }, /* 10: PIIX4 USB */
|
|
{0, PCIB, 0, 0, 0 }, /* 11: AMD 79C973 Ethernet */
|
|
{0, PCIC, 0, 0, 0 }, /* 12: Crystal 4281 Sound */
|
|
{0, 0, 0, 0, 0 }, /* 13: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 14: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 15: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 16: Unused */
|
|
{0, 0, 0, 0, 0 }, /* 17: Bonito/SOC-it PCI Bridge*/
|
|
{0, PCIA, PCIB, PCIC, PCID }, /* 18: PCI Slot 1 */
|
|
{0, PCIB, PCIC, PCID, PCIA }, /* 19: PCI Slot 2 */
|
|
{0, PCIC, PCID, PCIA, PCIB }, /* 20: PCI Slot 3 */
|
|
{0, PCID, PCIA, PCIB, PCIC } /* 21: PCI Slot 4 */
|
|
};
|
|
|
|
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
int virq;
|
|
virq = irq_tab[slot][pin];
|
|
return pci_irq[virq];
|
|
}
|
|
|
|
/* Do platform specific device initialization at pci_enable_device() time */
|
|
int pcibios_plat_dev_init(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void __devinit malta_piix_func0_fixup(struct pci_dev *pdev)
|
|
{
|
|
unsigned char reg_val;
|
|
static int piixirqmap[16] __devinitdata = { /* PIIX PIRQC[A:D] irq mappings */
|
|
0, 0, 0, 3,
|
|
4, 5, 6, 7,
|
|
0, 9, 10, 11,
|
|
12, 0, 14, 15
|
|
};
|
|
int i;
|
|
|
|
/* Interrogate PIIX4 to get PCI IRQ mapping */
|
|
for (i = 0; i <= 3; i++) {
|
|
pci_read_config_byte(pdev, 0x60+i, ®_val);
|
|
if (reg_val & 0x80)
|
|
pci_irq[PCIA+i] = 0; /* Disabled */
|
|
else
|
|
pci_irq[PCIA+i] = piixirqmap[reg_val & 15];
|
|
}
|
|
|
|
/* Done by YAMON 2.00 onwards */
|
|
if (PCI_SLOT(pdev->devfn) == 10) {
|
|
/*
|
|
* Set top of main memory accessible by ISA or DMA
|
|
* devices to 16 Mb.
|
|
*/
|
|
pci_read_config_byte(pdev, 0x69, ®_val);
|
|
pci_write_config_byte(pdev, 0x69, reg_val | 0xf0);
|
|
}
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
|
|
malta_piix_func0_fixup);
|
|
|
|
static void __devinit malta_piix_func1_fixup(struct pci_dev *pdev)
|
|
{
|
|
unsigned char reg_val;
|
|
|
|
/* Done by YAMON 2.02 onwards */
|
|
if (PCI_SLOT(pdev->devfn) == 10) {
|
|
/*
|
|
* IDE Decode enable.
|
|
*/
|
|
pci_read_config_byte(pdev, 0x41, ®_val);
|
|
pci_write_config_byte(pdev, 0x41, reg_val|0x80);
|
|
pci_read_config_byte(pdev, 0x43, ®_val);
|
|
pci_write_config_byte(pdev, 0x43, reg_val|0x80);
|
|
}
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB,
|
|
malta_piix_func1_fixup);
|