/* * This file is part of the coreboot project. * * Copyright (C) 2008 Rudolf Marek <r.marek@assembler.cz> * Copyright (C) 2011 Alexandru Gagniuc <mr.nuke.me@gmail.com> * * 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 <device/device.h> #include <device/pci.h> #include <device/pci_ops.h> #include <device/pci_ids.h> #include <console/console.h> #include "vt8237r.h" /* We support here K8M890/K8T890 and VT8237/S/A PCI1/Vlink */ static void vt8237_cfg(struct device *dev) { u8 regm; device_t devfun3; devfun3 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T800_DRAM, 0); if (!devfun3) devfun3 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8M800_DRAM, 0); if (!devfun3) devfun3 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T890CE_3, 0); if (!devfun3) devfun3 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8M890CE_3, 0); if (!devfun3) devfun3 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T890CF_3, 0); if (!devfun3) die("Unknown NB"); /* CPU to PCI Flow Control 1 & 2, just fill in recommended. */ pci_write_config8(dev, 0x70, 0xc2); pci_write_config8(dev, 0x71, 0xc8); /* PCI Control */ pci_write_config8(dev, 0x72, 0xee); pci_write_config8(dev, 0x73, 0x01); pci_write_config8(dev, 0x74, 0x3c); pci_write_config8(dev, 0x75, 0x0f); pci_write_config8(dev, 0x76, 0x50); pci_write_config8(dev, 0x77, 0x48); pci_write_config8(dev, 0x78, 0x01); /* APIC on HT */ /* Maybe Enable LDT APIC Mode bit3 set to 1 */ pci_write_config8(dev, 0x7c, 0x77); /* WARNING: Need to copy some registers from NB (D0F3) to SB (D11F7). */ regm = pci_read_config8(devfun3, 0x88); /* Shadow mem CTRL */ pci_write_config8(dev, 0x57, regm); regm = pci_read_config8(devfun3, 0x80); /* Shadow page C */ pci_write_config8(dev, 0x61, regm); regm = pci_read_config8(devfun3, 0x81); /* Shadow page D */ pci_write_config8(dev, 0x62, regm); /* Shadow page F + memhole copy */ regm = pci_read_config8(devfun3, 0x83); pci_write_config8(dev, 0x63, regm); regm = pci_read_config8(devfun3, 0x82);/* Shadow page E */ pci_write_config8(dev, 0x64, regm); regm = pci_read_config8(devfun3, 0x86); /* SMM and APIC decoding */ pci_write_config8(dev, 0xe6, regm); } /** * Example of setup: Setup the V-Link for VT8237R, 8X mode. * * For K8T890CF VIA recommends what is in VIA column, AW is award 8X: * * REG DEF AW VIA-8X VIA-4X * ----------------------------- * NB V-Link Manual Driving Control strobe 0xb5 0x46 0x46 0x88 0x88 * NB V-Link Manual Driving Control - Data 0xb6 0x46 0x46 0x88 0x88 * NB V-Link Receiving Strobe Delay 0xb7 0x02 0x02 0x61 0x01 * NB V-Link Compensation Control bit4,0 (b5,b6) 0xb4 0x10 0x10 0x11 0x11 * SB V-Link Strobe Drive Control 0xb9 0x00 0xa5 0x98 0x98 * SB V-Link Data drive Control???? 0xba 0x00 0xbb 0x77 0x77 * SB V-Link Receive Strobe Delay???? 0xbb 0x04 0x11 0x11 0x11 * SB V-Link Compensation Control bit0 (use b9) 0xb8 0x00 0x01 0x01 0x01 * V-Link CKG Control 0xb0 0x05 0x05 0x06 0x03 * V-Link CKG Control 0xb1 0x05 0x05 0x01 0x03 */ /* we setup 533MB/s mode full duplex */ static void vt8237s_vlink_init(struct device *dev) { u8 reg; device_t devfun7; devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T800_NB_SB_CTR, 0); if (!devfun7) devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8M800_NB_SB_CTR, 0); if (!devfun7) devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T890CE_7, 0); if (!devfun7) devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8M890CE_7, 0); if (!devfun7) devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T890CF_7, 0); /* No pairing NB was found. */ if (!devfun7) { printk(BIOS_DEBUG, "vt8237s_vlink_init: No pairing NB was found.\n"); return; } /* * This init code is valid only for the VT8237S! For different * southbridges (e.g. VT8237A, VT8237S, VT8237R (without plus R) * and VT8251) a different init code is required. */ /* disable auto disconnect */ reg = pci_read_config8(devfun7, 0x42); reg &= ~0x4; pci_write_config8(devfun7, 0x42, reg); /* NB part setup */ pci_write_config8(devfun7, 0xb5, 0x66); pci_write_config8(devfun7, 0xb6, 0x66); pci_write_config8(devfun7, 0xb7, 0x64); reg = pci_read_config8(devfun7, 0xb4); reg |= 0x1; reg &= ~0x10; pci_write_config8(devfun7, 0xb4, reg); pci_write_config8(devfun7, 0xb0, 0x6); pci_write_config8(devfun7, 0xb1, 0x1); /* SB part setup */ pci_write_config8(dev, 0xb7, 0x60); pci_write_config8(dev, 0xb9, 0x88); pci_write_config8(dev, 0xba, 0x88); pci_write_config8(dev, 0xbb, 0x89); reg = pci_read_config8(dev, 0xbd); reg |= 0x3; reg &= ~0x4; pci_write_config8(dev, 0xbd, reg); reg = pci_read_config8(dev, 0xbc); reg &= ~0x7; pci_write_config8(dev, 0xbc, reg); /* Program V-link 8X 8bit full duplex, parity enabled. */ pci_write_config8(dev, 0x48, 0x23 | 0x80); /* enable auto disconnect, for STPGNT and HALT */ reg = pci_read_config8(devfun7, 0x42); reg |= 0x7; pci_write_config8(devfun7, 0x42, reg); } static void vt8237a_vlink_init(struct device *dev) { u8 reg; device_t devfun7; devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T800_NB_SB_CTR, 0); if (!devfun7) devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8M800_NB_SB_CTR, 0); if (!devfun7) devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T890CE_7, 0); if (!devfun7) devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8M890CE_7, 0); if (!devfun7) devfun7 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_K8T890CF_7, 0); /* No pairing NB was found. */ if (!devfun7) { printk(BIOS_DEBUG, "vt8237a_vlink_init: No pairing NB was found.\n"); return; } /* * This init code is valid only for the VT8237A! For different * southbridges (e.g. VT8237S, VT8237R and VT8251) a different * init code is required. * * FIXME: This is based on vt8237r_vlink_init() in * k8t890/k8t890_ctrl.c and modified to fit what the AMI * BIOS on my M2V wrote to these registers (by looking * at lspci -nxxx output). * Works for me. */ /* disable auto disconnect */ reg = pci_read_config8(devfun7, 0x42); reg &= ~0x4; pci_write_config8(devfun7, 0x42, reg); /* NB part setup */ pci_write_config8(devfun7, 0xb5, 0x88); pci_write_config8(devfun7, 0xb6, 0x88); pci_write_config8(devfun7, 0xb7, 0x61); reg = pci_read_config8(devfun7, 0xb4); reg |= 0x11; pci_write_config8(devfun7, 0xb4, reg); pci_write_config8(devfun7, 0xb0, 0x6); pci_write_config8(devfun7, 0xb1, 0x1); /* SB part setup */ pci_write_config8(dev, 0xb7, 0x50); pci_write_config8(dev, 0xb9, 0x88); pci_write_config8(dev, 0xba, 0x8a); pci_write_config8(dev, 0xbb, 0x88); reg = pci_read_config8(dev, 0xbd); reg |= 0x3; reg &= ~0x4; pci_write_config8(dev, 0xbd, reg); reg = pci_read_config8(dev, 0xbc); reg &= ~0x7; pci_write_config8(dev, 0xbc, reg); pci_write_config8(dev, 0x48, 0x23); /* enable auto disconnect, for STPGNT and HALT */ reg = pci_read_config8(devfun7, 0x42); reg |= 0x7; pci_write_config8(devfun7, 0x42, reg); } static void ctrl_enable(struct device *dev) { /* Enable the 0:13 and 0:13.1. */ /* FIXME */ pci_write_config8(dev, 0x4f, 0x43); } static void ctrl_init(struct device *dev) { /* * TODO: Fix some ordering issue for V-link set Rx77[6] and * PCI1_Rx4F[0] should to 1. * FIXME DO you need? */ /* * VT8237R specific configuration. Other SB are done in their own * directories. TODO: Add A version. */ device_t devsb = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT8237S_LPC, 0); if (devsb) { vt8237s_vlink_init(dev); } devsb = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT8237A_LPC, 0); if (devsb) { vt8237a_vlink_init(dev); } /* Configure PCI1 and copy mirror registers from D0F3. */ vt8237_cfg(dev); dump_south(dev); } static const struct device_operations ctrl_ops = { .read_resources = pci_dev_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = ctrl_init, .enable = ctrl_enable, .ops_pci = 0, }; static const struct pci_driver northbridge_driver_t __pci_driver = { .ops = &ctrl_ops, .vendor = PCI_VENDOR_ID_VIA, .device = PCI_DEVICE_ID_VIA_VT8237_VLINK, };