diff options
Diffstat (limited to 'src/southbridge')
| -rw-r--r-- | src/southbridge/intel/i82801ex/lpc.c | 65 |
1 files changed, 45 insertions, 20 deletions
diff --git a/src/southbridge/intel/i82801ex/lpc.c b/src/southbridge/intel/i82801ex/lpc.c index d0d597871f..fb1586eb12 100644 --- a/src/southbridge/intel/i82801ex/lpc.c +++ b/src/southbridge/intel/i82801ex/lpc.c @@ -21,6 +21,45 @@ #define CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL MAINBOARD_POWER_ON #endif +/** + * Enable ACPI I/O range. + * + * @param dev PCI device with ACPI and PM BAR's + */ +static void i82801ex_enable_acpi(struct device *dev) +{ + u8 gpio_cntl; + + /* Enable ACPI I/O range decode and ACPI power management. */ + pci_write_config8(dev, ACPI_CNTL, ACPI_EN); + + /* Enable the GPIO bar */ + gpio_cntl = pci_read_config8(dev, GPIO_CNTL); + gpio_cntl |= GPIO_EN; + pci_write_config8(dev, GPIO_CNTL, gpio_cntl); +} + +/** + * Set miscellanous static southbridge features. + * + * @param dev PCI device with I/O APIC configuration registers + */ +static void i82801ex_general_cntl(struct device *dev) +{ + u32 reg32; + + reg32 = pci_read_config32(dev, GEN_CNTL); + reg32 |= (3 << 7); /* IOAPIC enable (APIC_EN) */ + reg32 |= (1 << 1); /* Delayed transaction enable (DTE) */ + pci_write_config32(dev, GEN_CNTL, reg32); + printk(BIOS_DEBUG, "Southbridge GEN_CNTL 0x%08x\n", reg32); + + reg32 = pci_read_config32(dev, GEN_STS); + reg32 |= (1<<1); + pci_write_config32(dev, GEN_STS, reg32); + +} + #define SERIRQ_CNTL 0x64 static void i82801ex_enable_serial_irqs(device_t dev) { @@ -237,16 +276,11 @@ static void enable_hpet(struct device *dev) static void lpc_init(struct device *dev) { uint8_t byte; - uint32_t value; int pwr_on=CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL; - /* IO APIC initialization */ - value = pci_read_config32(dev, 0xd0); - value |= (1 << 8)|(1<<7)|(1<<1); - pci_write_config32(dev, 0xd0, value); - value = pci_read_config32(dev, 0xd4); - value |= (1<<1); - pci_write_config32(dev, 0xd4, value); + i82801ex_general_cntl(dev); + + /* IO APIC initialization. */ setup_ioapic(IO_APIC_ADDR, 0); // Don't rename IO APIC ID. i82801ex_enable_serial_irqs(dev); @@ -319,20 +353,11 @@ static void i82801ex_lpc_read_resources(device_t dev) static void i82801ex_lpc_enable_resources(device_t dev) { - uint8_t acpi_cntl, gpio_cntl; - - /* Enable the normal pci resources */ + /* Enable the normal PCI resources. */ pci_dev_enable_resources(dev); - /* Enable the ACPI bar */ - acpi_cntl = pci_read_config8(dev, 0x44); - acpi_cntl |= (1 << 4); - pci_write_config8(dev, 0x44, acpi_cntl); - - /* Enable the GPIO bar */ - gpio_cntl = pci_read_config8(dev, 0x5c); - gpio_cntl |= (1 << 4); - pci_write_config8(dev, 0x5c, gpio_cntl); + /* Enable ACPI and GPIO BARs. */ + i82801ex_enable_acpi(dev); } static struct pci_operations lops_pci = { |