| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2010 Advanced Micro Devices, Inc. |
| * |
| * 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. |
| */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_ops.h> |
| #include "rs780.h" |
| |
| /* for UMA internal graphics */ |
| void avoid_lpc_dma_deadlock(device_t nb_dev, device_t sb_dev) |
| { |
| device_t cpu_f0; |
| u8 reg; |
| |
| cpu_f0 = dev_find_slot(0, PCI_DEVFN(0x18, 0)); |
| set_nbcfg_enable_bits(cpu_f0, 0x68, 3 << 21, 1 << 21); |
| |
| reg = nbpcie_p_read_index(sb_dev, 0x10); |
| reg |= 0x100; /* bit9=1 */ |
| nbpcie_p_write_index(sb_dev, 0x10, reg); |
| |
| reg = nbpcie_p_read_index(nb_dev, 0x10); |
| reg |= 0x100; /* bit9=1 */ |
| nbpcie_p_write_index(nb_dev, 0x10, reg); |
| |
| /* Enable NP protocol over PCIE for memory-mapped writes targeting LPC |
| * Set this bit to avoid a deadlock condition. */ |
| reg = htiu_read_index(nb_dev, 0x6); |
| reg |= 0x1000000; /* bit26 */ |
| htiu_write_index(nb_dev, 0x6, reg); |
| } |
| |
| static void pcie_init(struct device *dev) |
| { |
| /* Enable pci error detecting */ |
| u32 dword; |
| |
| printk(BIOS_INFO, "pcie_init in rs780_ht.c\n"); |
| |
| /* System error enable */ |
| dword = pci_read_config32(dev, 0x04); |
| dword |= (1 << 8); /* System error enable */ |
| dword |= (1 << 30); /* Clear possible errors */ |
| pci_write_config32(dev, 0x04, dword); |
| |
| /* |
| * 1 is APIC enable |
| * 18 is enable nb to accept A4 interrupt request from SB. |
| */ |
| dword = pci_read_config32(dev, 0x4C); |
| dword |= 1 << 1 | 1 << 18; /* Clear possible errors */ |
| pci_write_config32(dev, 0x4C, dword); |
| } |
| |
| static struct pci_operations lops_pci = { |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| |
| static struct device_operations ht_ops = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = pcie_init, |
| .scan_bus = 0, |
| .ops_pci = &lops_pci, |
| }; |
| |
| static const struct pci_driver ht_driver __pci_driver = { |
| .ops = &ht_ops, |
| .vendor = PCI_VENDOR_ID_AMD, |
| .device = PCI_DEVICE_ID_AMD_RS780_HT, |
| }; |