sis85c503.c revision 1.8
1/* $OpenBSD: sis85c503.c,v 1.8 2008/06/26 05:42:11 ray Exp $ */ 2/* $NetBSD: sis85c503.c,v 1.2 2000/07/18 11:24:09 soda Exp $ */ 3 4/*- 5 * Copyright (c) 1999 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34/* 35 * Copyright (c) 1999, by UCHIYAMA Yasushi 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. The name of the developer may NOT be used to endorse or promote products 44 * derived from this software without specific prior written permission. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 */ 58 59/* 60 * Support for the SiS 85c503 PCI-ISA bridge interrupt controller. 61 */ 62 63#include <sys/param.h> 64#include <sys/systm.h> 65#include <sys/device.h> 66 67#include <machine/intr.h> 68#include <machine/bus.h> 69 70#include <dev/pci/pcivar.h> 71#include <dev/pci/pcireg.h> 72#include <dev/pci/pcidevs.h> 73 74#include <i386/pci/pcibiosvar.h> 75#include <i386/pci/sis85c503reg.h> 76#include <i386/pci/piixvar.h> 77 78int sis85c503_getclink(pciintr_icu_handle_t, int, int *); 79int sis85c503_get_intr(pciintr_icu_handle_t, int, int *); 80int sis85c503_set_intr(pciintr_icu_handle_t, int, int); 81 82const struct pciintr_icu sis85c503_pci_icu = { 83 sis85c503_getclink, 84 sis85c503_get_intr, 85 sis85c503_set_intr, 86 piix_get_trigger, 87 piix_set_trigger, 88}; 89 90int 91sis85c503_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag, 92 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp) 93{ 94 95 if (piix_init(pc, iot, tag, ptagp, phandp) == 0) { 96 *ptagp = &sis85c503_pci_icu; 97 return (0); 98 } 99 100 return (1); 101} 102 103int 104sis85c503_getclink(pciintr_icu_handle_t v, int link, int *clinkp) 105{ 106 107 /* Pattern 1: simple. */ 108 if (link >= 1 && link <= 4) { 109 *clinkp = SIS85C503_CFG_PIRQ_REGSTART + link - 1; 110 return (0); 111 } 112 113 /* Pattern 2: configuration register offset */ 114 if (link >= SIS85C503_CFG_PIRQ_REGSTART && 115 link <= SIS85C503_CFG_PIRQ_REGEND) { 116 *clinkp = link; 117 return (0); 118 } 119 120 return (1); 121} 122 123int 124sis85c503_get_intr(pciintr_icu_handle_t v, int clink, int *irqp) 125{ 126 struct piix_handle *ph = v; 127 pcireg_t reg; 128 129 if (SIS85C503_LEGAL_LINK(clink) == 0) 130 return (1); 131 132 reg = pci_conf_read(ph->ph_pc, ph->ph_tag, 133 SIS85C503_CFG_PIRQ_REGOFS(clink)); 134 reg = SIS85C503_CFG_PIRQ_REG(reg, clink); 135 136 if (reg & SIS85C503_CFG_PIRQ_ROUTE_DISABLE) 137 *irqp = 0xff; 138 else 139 *irqp = reg & SIS85C503_CFG_PIRQ_INTR_MASK; 140 141 return (0); 142} 143 144int 145sis85c503_set_intr(pciintr_icu_handle_t v, int clink, int irq) 146{ 147 struct piix_handle *ph = v; 148 int shift; 149 pcireg_t reg; 150 151 if (SIS85C503_LEGAL_LINK(clink) == 0 || SIS85C503_LEGAL_IRQ(irq) == 0) 152 return (1); 153 154 reg = pci_conf_read(ph->ph_pc, ph->ph_tag, 155 SIS85C503_CFG_PIRQ_REGOFS(clink)); 156 shift = SIS85C503_CFG_PIRQ_SHIFT(clink); 157 reg &= ~((SIS85C503_CFG_PIRQ_ROUTE_DISABLE | 158 SIS85C503_CFG_PIRQ_INTR_MASK) << shift); 159 reg |= (irq << shift); 160 pci_conf_write(ph->ph_pc, ph->ph_tag, SIS85C503_CFG_PIRQ_REGOFS(clink), 161 reg); 162 163 return (0); 164} 165