1 /* $OpenBSD: amd756.c,v 1.6 2023/01/30 10:49:05 jsg Exp $ */ 2 /* $NetBSD$ */ 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 Advanced Micro Devices AMD756 Peripheral Bus Controller. 61 */ 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/malloc.h> 66 67 #include <machine/intr.h> 68 #include <machine/bus.h> 69 70 #include <dev/pci/pcivar.h> 71 72 #include <i386/pci/pcibiosvar.h> 73 #include <i386/pci/amd756reg.h> 74 75 struct viper_handle { 76 bus_space_tag_t ph_iot; 77 bus_space_handle_t ph_regs_ioh; 78 pci_chipset_tag_t ph_pc; 79 pcitag_t ph_tag; 80 }; 81 82 int amd756_getclink(pciintr_icu_handle_t, int, int *); 83 int amd756_get_intr(pciintr_icu_handle_t, int, int *); 84 int amd756_set_intr(pciintr_icu_handle_t, int, int); 85 int amd756_get_trigger(pciintr_icu_handle_t, int, int *); 86 int amd756_set_trigger(pciintr_icu_handle_t, int, int); 87 #ifdef VIPER_DEBUG 88 static void amd756_pir_dump(struct viper_handle *); 89 #endif 90 91 const struct pciintr_icu amd756_pci_icu = { 92 amd756_getclink, 93 amd756_get_intr, 94 amd756_set_intr, 95 amd756_get_trigger, 96 amd756_set_trigger, 97 }; 98 99 100 int 101 amd756_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag, 102 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp) 103 { 104 struct viper_handle *ph; 105 106 ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT); 107 if (ph == NULL) 108 return (1); 109 110 ph->ph_iot = iot; 111 ph->ph_pc = pc; 112 ph->ph_tag = tag; 113 114 *ptagp = &amd756_pci_icu; 115 *phandp = ph; 116 117 #ifdef VIPER_DEBUG 118 amd756_pir_dump(ph); 119 #endif 120 121 return 0; 122 } 123 124 int 125 amd756_getclink(pciintr_icu_handle_t v, int link, int *clinkp) 126 { 127 if (AMD756_LEGAL_LINK(link - 1) == 0) 128 return (1); 129 130 *clinkp = link - 1; 131 return (0); 132 } 133 134 int 135 amd756_get_intr(pciintr_icu_handle_t v, int clink, int *irqp) 136 { 137 struct viper_handle *ph = v; 138 pcireg_t reg; 139 int val; 140 141 if (AMD756_LEGAL_LINK(clink) == 0) 142 return (1); 143 144 reg = AMD756_GET_PIIRQSEL(ph); 145 val = (reg >> (4*clink)) & 0x0f; 146 *irqp = (val == 0) ? 147 I386_PCI_INTERRUPT_LINE_NO_CONNECTION : val; 148 149 return (0); 150 } 151 152 int 153 amd756_set_intr(pciintr_icu_handle_t v, int clink, int irq) 154 { 155 struct viper_handle *ph = v; 156 int val; 157 pcireg_t reg; 158 159 if (AMD756_LEGAL_LINK(clink) == 0 || AMD756_LEGAL_IRQ(irq) == 0) 160 return (1); 161 162 reg = AMD756_GET_PIIRQSEL(ph); 163 amd756_get_intr(v, clink, &val); 164 reg &= ~(0x000f << (4*clink)); 165 reg |= irq << (4*clink); 166 AMD756_SET_PIIRQSEL(ph, reg); 167 168 return 0; 169 } 170 171 int 172 amd756_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp) 173 { 174 struct viper_handle *ph = v; 175 int i, pciirq; 176 pcireg_t reg; 177 178 if (AMD756_LEGAL_IRQ(irq) == 0) 179 return (1); 180 181 for (i = 0; i <= 3; i++) { 182 amd756_get_intr(v, i, &pciirq); 183 if (pciirq == irq) { 184 reg = AMD756_GET_EDGESEL(ph); 185 if (reg & (1 << i)) 186 *triggerp = IST_EDGE; 187 else 188 *triggerp = IST_LEVEL; 189 break; 190 } 191 } 192 193 return 0; 194 } 195 196 int 197 amd756_set_trigger(pciintr_icu_handle_t v, int irq, int trigger) 198 { 199 struct viper_handle *ph = v; 200 int i, pciirq; 201 pcireg_t reg; 202 203 if (AMD756_LEGAL_IRQ(irq) == 0) 204 return (1); 205 206 for (i = 0; i <= 3; i++) { 207 amd756_get_intr(v, i, &pciirq); 208 if (pciirq == irq) { 209 reg = AMD756_GET_PIIRQSEL(ph); 210 if (trigger == IST_LEVEL) 211 reg &= ~(1 << (4*i)); 212 else 213 reg |= 1 << (4*i); 214 AMD756_SET_PIIRQSEL(ph, reg); 215 break; 216 } 217 } 218 219 return (0); 220 } 221 222 #ifdef VIPER_DEBUG 223 static void 224 amd756_pir_dump(struct viper_handle *ph) 225 { 226 int a, b; 227 228 printf ("VIPER PCI INTERRUPT ROUTING REGISTERS:\n"); 229 230 a = AMD756_GET_EDGESEL(ph); 231 b = AMD756_GET_PIIRQSEL(ph); 232 233 printf ("TRIGGER: %02x, ROUTING: %04x\n", a, b); 234 } 235 #endif 236