diff options
Diffstat (limited to 'src/southbridge/intel/pxhd/bridge.c')
| -rw-r--r-- | src/southbridge/intel/pxhd/bridge.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/southbridge/intel/pxhd/bridge.c b/src/southbridge/intel/pxhd/bridge.c new file mode 100644 index 0000000000..1134f8f2f8 --- /dev/null +++ b/src/southbridge/intel/pxhd/bridge.c @@ -0,0 +1,212 @@ +/* + * (C) 2003-2004 Linux Networx + */ +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#include <device/pcix.h> +#include <pc80/mc146818rtc.h> +#include <arch/ioapic.h> +#include <delay.h> +#include "pxhd.h" + +static void pxhd_enable(device_t dev) +{ + device_t bridge; + uint16_t value; + if ((dev->path.pci.devfn & 1) == 0) { + /* Can we enable/disable the bridges? */ + return; + } + bridge = dev_find_slot(dev->bus->secondary, dev->path.pci.devfn & ~1); + if (!bridge) { + printk(BIOS_ERR, "Cannot find bridge for ioapic: %s\n", + dev_path(dev)); + return; + } + value = pci_read_config16(bridge, 0x40); + value &= ~(1 << 13); + if (!dev->enabled) { + value |= (1 << 13); + } + pci_write_config16(bridge, 0x40, value); +} + + +#define NMI_OFF 0 + +static unsigned int pxhd_scan_bridge(device_t dev, unsigned int max) +{ + int bus_100Mhz = 0; + + dev->link_list->dev = dev; + + get_option(&bus_100Mhz, "pxhd_bus_speed_100"); + if(bus_100Mhz) { + uint16_t word; + + printk(BIOS_DEBUG, "setting pxhd bus to 100 Mhz\n"); + /* set to pcix 100 mhz */ + word = pci_read_config16(dev, 0x40); + word &= ~(3 << 14); + word |= (1 << 14); + word &= ~(3 << 9); + word |= (2 << 9); + pci_write_config16(dev, 0x40, word); + + /* reset the bus to make the new frequencies effective */ + pci_bus_reset(dev->link_list); + } + return pcix_scan_bridge(dev, max); +} +static void pcix_init(device_t dev) +{ + /* Bridge control ISA enable */ + pci_write_config8(dev, 0x3e, 0x07); + + // FIXME Please review lots of dead code here. +#if 0 + int nmi_option; + uint32_t dword; + uint16_t word; + uint8_t byte; + + /* Enable memory write and invalidate ??? */ + byte = pci_read_config8(dev, 0x04); + byte |= 0x10; + pci_write_config8(dev, 0x04, byte); + + /* Set drive strength */ + word = pci_read_config16(dev, 0xe0); + word = 0x0404; + pci_write_config16(dev, 0xe0, word); + word = pci_read_config16(dev, 0xe4); + word = 0x0404; + pci_write_config16(dev, 0xe4, word); + + /* Set impedance */ + word = pci_read_config16(dev, 0xe8); + word = 0x0404; + pci_write_config16(dev, 0xe8, word); + + /* Set discard unrequested prefetch data */ + word = pci_read_config16(dev, 0x4c); + word |= 1; + pci_write_config16(dev, 0x4c, word); + + /* Set split transaction limits */ + word = pci_read_config16(dev, 0xa8); + pci_write_config16(dev, 0xaa, word); + word = pci_read_config16(dev, 0xac); + pci_write_config16(dev, 0xae, word); + + /* Set up error reporting, enable all */ + /* system error enable */ + dword = pci_read_config32(dev, 0x04); + dword |= (1<<8); + pci_write_config32(dev, 0x04, dword); + + /* system and error parity enable */ + dword = pci_read_config32(dev, 0x3c); + dword |= (3<<16); + pci_write_config32(dev, 0x3c, dword); + + /* NMI enable */ + nmi_option = NMI_OFF; + get_option(&nmi_option, "nmi"); + if(nmi_option) { + dword = pci_read_config32(dev, 0x44); + dword |= (1<<0); + pci_write_config32(dev, 0x44, dword); + } + + /* Set up CRC flood enable */ + dword = pci_read_config32(dev, 0xc0); + if(dword) { /* do device A only */ + dword = pci_read_config32(dev, 0xc4); + dword |= (1<<1); + pci_write_config32(dev, 0xc4, dword); + dword = pci_read_config32(dev, 0xc8); + dword |= (1<<1); + pci_write_config32(dev, 0xc8, dword); + } + + return; +#endif +} + +static struct device_operations pcix_ops = { + .read_resources = pci_bus_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_bus_enable_resources, + .init = pcix_init, + .scan_bus = pxhd_scan_bridge, + .reset_bus = pci_bus_reset, + .ops_pci = 0, +}; + +static const struct pci_driver pcix_driver __pci_driver = { + .ops = &pcix_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x0329, +}; + +static const struct pci_driver pcix_driver2 __pci_driver = { + .ops = &pcix_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x032a, +}; + +static void ioapic_init(device_t dev) +{ + uint32_t value, ioapic_base; + /* Enable bus mastering so IOAPICs work */ + value = pci_read_config16(dev, PCI_COMMAND); + value |= PCI_COMMAND_MASTER; + pci_write_config16(dev, PCI_COMMAND, value); + + ioapic_base = pci_read_config32(dev, PCI_BASE_ADDRESS_0); + + setup_ioapic(ioapic_base, 0); // Don't rename IOAPIC ID +} + +static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device) +{ + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + ((device & 0xffff) << 16) | (vendor & 0xffff)); +} + +static struct pci_operations intel_ops_pci = { + .set_subsystem = intel_set_subsystem, +}; + +static struct device_operations ioapic_ops = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = ioapic_init, + .scan_bus = 0, + .enable = pxhd_enable, + .ops_pci = &intel_ops_pci, +}; + +static const struct pci_driver ioapic_driver __pci_driver = { + .ops = &ioapic_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x0326, + +}; + +static const struct pci_driver ioapic2_driver __pci_driver = { + .ops = &ioapic_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x0327, + +}; + +struct chip_operations southbridge_intel_pxhd_ops = { + CHIP_NAME("Intel PXHD Southbridge") + .enable_dev = pxhd_enable, +}; |