/* * 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, };