1/* $OpenBSD: sis85c503.c,v 1.9 2023/01/30 10:49:05 jsg 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 66#include <machine/intr.h> 67#include <machine/bus.h> 68 69#include <dev/pci/pcivar.h> 70 71#include <i386/pci/pcibiosvar.h> 72#include <i386/pci/sis85c503reg.h> 73#include <i386/pci/piixvar.h> 74 75int sis85c503_getclink(pciintr_icu_handle_t, int, int *); 76int sis85c503_get_intr(pciintr_icu_handle_t, int, int *); 77int sis85c503_set_intr(pciintr_icu_handle_t, int, int); 78 79const struct pciintr_icu sis85c503_pci_icu = { 80 sis85c503_getclink, 81 sis85c503_get_intr, 82 sis85c503_set_intr, 83 piix_get_trigger, 84 piix_set_trigger, 85}; 86 87int 88sis85c503_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag, 89 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp) 90{ 91 92 if (piix_init(pc, iot, tag, ptagp, phandp) == 0) { 93 *ptagp = &sis85c503_pci_icu; 94 return (0); 95 } 96 97 return (1); 98} 99 100int 101sis85c503_getclink(pciintr_icu_handle_t v, int link, int *clinkp) 102{ 103 104 /* Pattern 1: simple. */ 105 if (link >= 1 && link <= 4) { 106 *clinkp = SIS85C503_CFG_PIRQ_REGSTART + link - 1; 107 return (0); 108 } 109 110 /* Pattern 2: configuration register offset */ 111 if (link >= SIS85C503_CFG_PIRQ_REGSTART && 112 link <= SIS85C503_CFG_PIRQ_REGEND) { 113 *clinkp = link; 114 return (0); 115 } 116 117 return (1); 118} 119 120int 121sis85c503_get_intr(pciintr_icu_handle_t v, int clink, int *irqp) 122{ 123 struct piix_handle *ph = v; 124 pcireg_t reg; 125 126 if (SIS85C503_LEGAL_LINK(clink) == 0) 127 return (1); 128 129 reg = pci_conf_read(ph->ph_pc, ph->ph_tag, 130 SIS85C503_CFG_PIRQ_REGOFS(clink)); 131 reg = SIS85C503_CFG_PIRQ_REG(reg, clink); 132 133 if (reg & SIS85C503_CFG_PIRQ_ROUTE_DISABLE) 134 *irqp = 0xff; 135 else 136 *irqp = reg & SIS85C503_CFG_PIRQ_INTR_MASK; 137 138 return (0); 139} 140 141int 142sis85c503_set_intr(pciintr_icu_handle_t v, int clink, int irq) 143{ 144 struct piix_handle *ph = v; 145 int shift; 146 pcireg_t reg; 147 148 if (SIS85C503_LEGAL_LINK(clink) == 0 || SIS85C503_LEGAL_IRQ(irq) == 0) 149 return (1); 150 151 reg = pci_conf_read(ph->ph_pc, ph->ph_tag, 152 SIS85C503_CFG_PIRQ_REGOFS(clink)); 153 shift = SIS85C503_CFG_PIRQ_SHIFT(clink); 154 reg &= ~((SIS85C503_CFG_PIRQ_ROUTE_DISABLE | 155 SIS85C503_CFG_PIRQ_INTR_MASK) << shift); 156 reg |= (irq << shift); 157 pci_conf_write(ph->ph_pc, ph->ph_tag, SIS85C503_CFG_PIRQ_REGOFS(clink), 158 reg); 159 160 return (0); 161} 162