| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2008-2009 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; version 2 of |
| * the License. |
| * |
| * 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; |
| u8 reg8; |
| |
| /* Enable Bus Master */ |
| reg16 = pci_read_config16(dev, PCI_COMMAND); |
| reg16 |= PCI_COMMAND_MASTER; |
| pci_write_config16(dev, PCI_COMMAND, reg16); |
| |
| /* This device has no interrupt */ |
| pci_write_config8(dev, 0x3c, 0xff); |
| |
| /* disable parity error response and SERR */ |
| reg16 = pci_read_config16(dev, 0x3e); |
| reg16 &= ~(1 << 0); |
| reg16 &= ~(1 << 1); |
| pci_write_config16(dev, 0x3e, reg16); |
| |
| /* Master Latency Count must be set to 0x04! */ |
| reg8 = pci_read_config8(dev, 0x1b); |
| reg8 &= 0x07; |
| reg8 |= (0x04 << 3); |
| pci_write_config8(dev, 0x1b, reg8); |
| |
| /* Will this improve throughput of bus masters? */ |
| pci_write_config8(dev, PCI_MIN_GNT, 0x06); |
| |
| /* 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); |
| } |
| |
| #undef PCI_BRIDGE_UPDATE_COMMAND |
| 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); |
| } |
| |
| command = pci_read_config16(dev, PCI_COMMAND); |
| command |= dev->command; |
| #if PCI_BRIDGE_UPDATE_COMMAND |
| /* If we write to PCI_COMMAND, on some systems |
| * this will cause the ROM and APICs not being visible |
| * anymore. |
| */ |
| printk_debug("%s cmd <- %02x\n", dev_path(dev), command); |
| pci_write_config16(dev, PCI_COMMAND, command); |
| #else |
| printk_debug("%s cmd <- %02x (NOT WRITTEN!)\n", dev_path(dev), 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) |
| { |
| /* NOTE: This is not the default position! */ |
| if (!vendor || !device) { |
| pci_write_config32(dev, 0x54, |
| pci_read_config32(dev, PCI_VENDOR_ID)); |
| } else { |
| pci_write_config32(dev, 0x54, |
| ((device & 0xffff) << 16) | (vendor & 0xffff)); |
| } |
| } |
| |
| 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 */ |
| /* 82801BA/CA/DB/EB/ER/FB/FR/FW/FRW/GB/GR/GDH/HB/IB/6300ESB/i3100 */ |
| static const struct pci_driver i82801g_pci __pci_driver = { |
| .ops = &device_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = 0x244e, |
| }; |
| |
| /* Mobile / Ultra Mobile */ |
| /* 82801BAM/CAM/DBL/DBM/FBM/GBM/GHM/GU/HBM/HEM */ |
| static const struct pci_driver i82801gmu_pci __pci_driver = { |
| .ops = &device_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = 0x2448, |
| }; |