169783Smsmith/*- 269783Smsmith * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier 369783Smsmith * Copyright (c) 2000 Michael Smith <msmith@freebsd.org> 469783Smsmith * Copyright (c) 2000 BSDi 569783Smsmith * All rights reserved. 669783Smsmith * 769783Smsmith * Redistribution and use in source and binary forms, with or without 869783Smsmith * modification, are permitted provided that the following conditions 969783Smsmith * are met: 1069783Smsmith * 1. Redistributions of source code must retain the above copyright 1169783Smsmith * notice, this list of conditions and the following disclaimer. 1269783Smsmith * 2. Redistributions in binary form must reproduce the above copyright 1369783Smsmith * notice, this list of conditions and the following disclaimer in the 1469783Smsmith * documentation and/or other materials provided with the distribution. 1569783Smsmith * 3. The name of the author may not be used to endorse or promote products 1669783Smsmith * derived from this software without specific prior written permission. 1769783Smsmith * 1869783Smsmith * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1969783Smsmith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2069783Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2169783Smsmith * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2269783Smsmith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2369783Smsmith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2469783Smsmith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2569783Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2669783Smsmith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2769783Smsmith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2869783Smsmith * SUCH DAMAGE. 2969783Smsmith */ 3069783Smsmith 31119418Sobrien#include <sys/cdefs.h> 32119418Sobrien__FBSDID("$FreeBSD$"); 33119418Sobrien 3469783Smsmith#include <sys/param.h> 35129876Sphk#include <sys/kernel.h> 36129876Sphk#include <sys/malloc.h> 37129876Sphk#include <sys/module.h> 3869783Smsmith#include <sys/systm.h> 3969783Smsmith#include <sys/bus.h> 4069783Smsmith 41119285Simp#include <dev/pci/pcivar.h> 42119285Simp#include <dev/pci/pcireg.h> 4369783Smsmith 4469783Smsmith/* 4569783Smsmith * Chipset fixups. 4669783Smsmith * 4769783Smsmith * These routines are invoked during the probe phase for devices which 4869783Smsmith * typically don't have specific device drivers, but which require 4969783Smsmith * some cleaning up. 5069783Smsmith */ 5169783Smsmith 5269783Smsmithstatic int fixup_pci_probe(device_t dev); 5369783Smsmithstatic void fixwsc_natoma(device_t dev); 54158881Sjhbstatic void fixc1_nforce2(device_t dev); 5569783Smsmith 5669783Smsmithstatic device_method_t fixup_pci_methods[] = { 5769783Smsmith /* Device interface */ 5869783Smsmith DEVMETHOD(device_probe, fixup_pci_probe), 5969783Smsmith DEVMETHOD(device_attach, bus_generic_attach), 6069783Smsmith { 0, 0 } 6169783Smsmith}; 6269783Smsmith 6369783Smsmithstatic driver_t fixup_pci_driver = { 6469783Smsmith "fixup_pci", 6569783Smsmith fixup_pci_methods, 6669783Smsmith 0, 6769783Smsmith}; 6869783Smsmith 6969783Smsmithstatic devclass_t fixup_pci_devclass; 7069783Smsmith 7169783SmsmithDRIVER_MODULE(fixup_pci, pci, fixup_pci_driver, fixup_pci_devclass, 0, 0); 7269783Smsmith 7369783Smsmithstatic int 7469783Smsmithfixup_pci_probe(device_t dev) 7569783Smsmith{ 7669783Smsmith switch (pci_get_devid(dev)) { 7769783Smsmith case 0x12378086: /* Intel 82440FX (Natoma) */ 7869783Smsmith fixwsc_natoma(dev); 7969783Smsmith break; 80158881Sjhb case 0x01e010de: /* nVidia nForce2 */ 81158881Sjhb fixc1_nforce2(dev); 82158881Sjhb break; 8369783Smsmith } 8469783Smsmith return(ENXIO); 8569783Smsmith} 8669783Smsmith 8769783Smsmithstatic void 8869783Smsmithfixwsc_natoma(device_t dev) 8969783Smsmith{ 9069783Smsmith int pmccfg; 9169783Smsmith 9269783Smsmith pmccfg = pci_read_config(dev, 0x50, 2); 9369783Smsmith#if defined(SMP) 9469783Smsmith if (pmccfg & 0x8000) { 95254207Srpaulo device_printf(dev, "correcting Natoma config for SMP\n"); 9669783Smsmith pmccfg &= ~0x8000; 9777649Speter pci_write_config(dev, 0x50, pmccfg, 2); 9869783Smsmith } 9969783Smsmith#else 10069783Smsmith if ((pmccfg & 0x8000) == 0) { 101254207Srpaulo device_printf(dev, "correcting Natoma config for non-SMP\n"); 10269783Smsmith pmccfg |= 0x8000; 10377649Speter pci_write_config(dev, 0x50, pmccfg, 2); 10469783Smsmith } 10569783Smsmith#endif 10669783Smsmith} 107158881Sjhb 108158881Sjhb/* 109158881Sjhb * Set the SYSTEM_IDLE_TIMEOUT to 80 ns on nForce2 systems to work 110158881Sjhb * around a hang that is triggered when the CPU generates a very fast 111158881Sjhb * CONNECT/HALT cycle sequence. Specifically, the hang can result in 112158881Sjhb * the lapic timer being stopped. 113158881Sjhb * 114158881Sjhb * This requires changing the value for config register at offset 0x6c 115158881Sjhb * for the Host-PCI bridge at bus/dev/function 0/0/0: 116158881Sjhb * 117158881Sjhb * Chip Current Value New Value 118158881Sjhb * ---- ---------- ---------- 119158881Sjhb * C17 0x1F0FFF01 0x1F01FF01 120158881Sjhb * C18D 0x9F0FFF01 0x9F01FF01 121158881Sjhb * 122158881Sjhb * We do this by always clearing the bits in 0x000e0000. 123158881Sjhb * 124158881Sjhb * See also: http://lkml.org/lkml/2004/5/3/157 125158881Sjhb */ 126158881Sjhbstatic void 127158881Sjhbfixc1_nforce2(device_t dev) 128158881Sjhb{ 129158881Sjhb uint32_t val; 130158881Sjhb 131158881Sjhb if (pci_get_bus(dev) == 0 && pci_get_slot(dev) == 0 && 132158881Sjhb pci_get_function(dev) == 0) { 133158881Sjhb val = pci_read_config(dev, 0x6c, 4); 134158881Sjhb if (val & 0x000e0000) { 135254207Srpaulo device_printf(dev, 136254207Srpaulo "correcting nForce2 C1 CPU disconnect hangs\n"); 137158881Sjhb val &= ~0x000e0000; 138158881Sjhb pci_write_config(dev, 0x6c, val, 4); 139158881Sjhb } 140158881Sjhb } 141158881Sjhb} 142