diff options
Diffstat (limited to 'src/southbridge/intel')
| -rw-r--r-- | src/southbridge/intel/i82801jx/chip.h | 13 | ||||
| -rw-r--r-- | src/southbridge/intel/i82801jx/lpc.c | 41 |
2 files changed, 21 insertions, 33 deletions
diff --git a/src/southbridge/intel/i82801jx/chip.h b/src/southbridge/intel/i82801jx/chip.h index 95d0d75cc1..533254a872 100644 --- a/src/southbridge/intel/i82801jx/chip.h +++ b/src/southbridge/intel/i82801jx/chip.h @@ -24,19 +24,6 @@ enum { struct southbridge_intel_i82801jx_config { /** - * Interrupt Routing configuration - * If bit7 is 1, the interrupt is disabled. - */ - uint8_t pirqa_routing; - uint8_t pirqb_routing; - uint8_t pirqc_routing; - uint8_t pirqd_routing; - uint8_t pirqe_routing; - uint8_t pirqf_routing; - uint8_t pirqg_routing; - uint8_t pirqh_routing; - - /** * GPI Routing configuration * * Only the lower two bits have a meaning: diff --git a/src/southbridge/intel/i82801jx/lpc.c b/src/southbridge/intel/i82801jx/lpc.c index bd50366751..18025ff5dc 100644 --- a/src/southbridge/intel/i82801jx/lpc.c +++ b/src/southbridge/intel/i82801jx/lpc.c @@ -94,42 +94,43 @@ static void i82801jx_enable_serial_irqs(struct device *dev) static void i82801jx_pirq_init(device_t dev) { device_t irq_dev; - /* Get the chip configuration */ - config_t *config = dev->chip_info; - pci_write_config8(dev, D31F0_PIRQA_ROUT, config->pirqa_routing); - pci_write_config8(dev, D31F0_PIRQB_ROUT, config->pirqb_routing); - pci_write_config8(dev, D31F0_PIRQC_ROUT, config->pirqc_routing); - pci_write_config8(dev, D31F0_PIRQD_ROUT, config->pirqd_routing); + /* Interrupt 11 is not used by legacy devices and so can always be used + * for PCI interrupts. Full legacy IRQ routing is complicated and hard + * to get right. Fortunately all modern OS use MSI and so it's not that + * big of an issue anyway. Still we have to provide a reasonable + * default. Using interrupt 11 for it everywhere is a working default. + * ACPI-aware OS can move it to any interrupt and others will just leave + * them at default. + */ + const u8 pirq_routing = 11; + + pci_write_config8(dev, D31F0_PIRQA_ROUT, pirq_routing); + pci_write_config8(dev, D31F0_PIRQB_ROUT, pirq_routing); + pci_write_config8(dev, D31F0_PIRQC_ROUT, pirq_routing); + pci_write_config8(dev, D31F0_PIRQD_ROUT, pirq_routing); - pci_write_config8(dev, D31F0_PIRQE_ROUT, config->pirqe_routing); - pci_write_config8(dev, D31F0_PIRQF_ROUT, config->pirqf_routing); - pci_write_config8(dev, D31F0_PIRQG_ROUT, config->pirqg_routing); - pci_write_config8(dev, D31F0_PIRQH_ROUT, config->pirqh_routing); + pci_write_config8(dev, D31F0_PIRQE_ROUT, pirq_routing); + pci_write_config8(dev, D31F0_PIRQF_ROUT, pirq_routing); + pci_write_config8(dev, D31F0_PIRQG_ROUT, pirq_routing); + pci_write_config8(dev, D31F0_PIRQH_ROUT, pirq_routing); /* Eric Biederman once said we should let the OS do this. * I am not so sure anymore he was right. */ for (irq_dev = all_devices; irq_dev; irq_dev = irq_dev->next) { - u8 int_pin=0, int_line=0; + u8 int_pin = 0; if (!irq_dev->enabled || irq_dev->path.type != DEVICE_PATH_PCI) continue; int_pin = pci_read_config8(irq_dev, PCI_INTERRUPT_PIN); - switch (int_pin) { - case 1: /* INTA# */ int_line = config->pirqa_routing; break; - case 2: /* INTB# */ int_line = config->pirqb_routing; break; - case 3: /* INTC# */ int_line = config->pirqc_routing; break; - case 4: /* INTD# */ int_line = config->pirqd_routing; break; - } - - if (!int_line) + if (int_pin == 0) continue; - pci_write_config8(irq_dev, PCI_INTERRUPT_LINE, int_line); + pci_write_config8(irq_dev, PCI_INTERRUPT_LINE, pirq_routing); } } |