diff options
Diffstat (limited to 'src/southbridge/intel/i82801gx/i82801gx_pci.c')
-rw-r--r-- | src/southbridge/intel/i82801gx/i82801gx_pci.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801gx/i82801gx_pci.c b/src/southbridge/intel/i82801gx/i82801gx_pci.c new file mode 100644 index 0000000000..cf7cad6c3e --- /dev/null +++ b/src/southbridge/intel/i82801gx/i82801gx_pci.c @@ -0,0 +1,141 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008 coresystems GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> + +static void pci_init(struct device *dev) +{ + u16 reg16; + +#if 0 + /* Commented out for now because it will break on some machines. */ + /* Set latency timer to 32. */ + pci_write_config16(dev, 0x1b, 0x20); +#endif + + /* disable parity error response */ + reg16 = pci_read_config16(dev, 0x3e); + reg16 &= ~(1 << 0); + pci_write_config16(dev, 0x3e, reg16); + + /* Clear errors in status registers */ + reg16 = pci_read_config16(dev, 0x06); + reg16 |= 0xf900; + pci_write_config16(dev, 0x06, reg16); + + reg16 = pci_read_config16(dev, 0x1e); + reg16 |= 0xf900; + pci_write_config16(dev, 0x1e, reg16); +} + +static void ich_pci_dev_enable_resources(struct device *dev) +{ + const struct pci_operations *ops; + uint16_t command; + + /* Set the subsystem vendor and device id for mainboard devices */ + ops = ops_pci(dev); + if (dev->on_mainboard && ops && ops->set_subsystem) { + printk_debug("%s subsystem <- %02x/%02x\n", + dev_path(dev), + MAINBOARD_PCI_SUBSYSTEM_VENDOR_ID, + MAINBOARD_PCI_SUBSYSTEM_DEVICE_ID); + ops->set_subsystem(dev, + MAINBOARD_PCI_SUBSYSTEM_VENDOR_ID, + MAINBOARD_PCI_SUBSYSTEM_DEVICE_ID); + } + +#if 0 + /* If we write to PCI_COMMAND, on some systems + * this will cause the ROM and APICs not being visible + * anymore. + */ + command = pci_read_config16(dev, PCI_COMMAND); + command |= dev->command; + printk_debug("%s cmd <- %02x\n", dev_path(dev), command); + pci_write_config16(dev, PCI_COMMAND, command); +#endif +} + +static void ich_pci_bus_enable_resources(struct device *dev) +{ + uint16_t ctrl; + /* enable IO in command register if there is VGA card + * connected with (even it does not claim IO resource) + */ + if (dev->link[0].bridge_ctrl & PCI_BRIDGE_CTL_VGA) + dev->command |= PCI_COMMAND_IO; + ctrl = pci_read_config16(dev, PCI_BRIDGE_CONTROL); + ctrl |= dev->link[0].bridge_ctrl; + ctrl |= (PCI_BRIDGE_CTL_PARITY + PCI_BRIDGE_CTL_SERR); /* error check */ + printk_debug("%s bridge ctrl <- %04x\n", dev_path(dev), ctrl); + pci_write_config16(dev, PCI_BRIDGE_CONTROL, ctrl); + + /* This is the reason we need our own pci_bus_enable_resources */ + ich_pci_dev_enable_resources(dev); + + enable_childrens_resources(dev); +} + +static void set_subsystem(device_t dev, unsigned vendor, unsigned device) +{ +#if 0 + /* Currently disabled because it causes a "BAR 9" memory resource + * conflict: + */ + u32 pci_id; + + printk_debug("Setting PCI bridge subsystem ID\n"); + pci_id = pci_read_config32(dev, 0); + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, pci_id ); +#endif +} + +static struct pci_operations pci_ops = { + .set_subsystem = set_subsystem, +}; + +static struct device_operations device_ops = { + .read_resources = pci_bus_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = ich_pci_bus_enable_resources, + .init = pci_init, + .scan_bus = pci_scan_bridge, + .ops_pci = &pci_ops, +}; + + +/* Desktop */ +static const struct pci_driver i82801g_pci __pci_driver = { + .ops = &device_ops, + .vendor = 0x8086, + .device = 0x244e, +}; + +/* Mobile / Ultra Mobile */ +static const struct pci_driver i82801gmu_pci __pci_driver = { + .ops = &device_ops, + .vendor = 0x8086, + .device = 0x2448, +}; + |