1 /* $OpenBSD: piix.c,v 1.5 2001/01/25 00:07:40 mickey Exp $ */ 2 /* $NetBSD: piix.c,v 1.1 1999/11/17 01:21:20 thorpej 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 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /* 42 * Copyright (c) 1999, by UCHIYAMA Yasushi 43 * All rights reserved. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. The name of the developer may NOT be used to endorse or promote products 51 * derived from this software without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 */ 65 66 /* 67 * Support for the Intel PIIX PCI-ISA bridge interrupt controller. 68 */ 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/device.h> 73 #include <sys/malloc.h> 74 75 #include <machine/intr.h> 76 #include <machine/bus.h> 77 78 #include <dev/pci/pcivar.h> 79 #include <dev/pci/pcireg.h> 80 #include <dev/pci/pcidevs.h> 81 82 #include <i386/pci/pcibiosvar.h> 83 #include <i386/pci/piixreg.h> 84 #include <i386/pci/piixvar.h> 85 86 #ifdef PIIX_DEBUG 87 #define DPRINTF(arg) printf arg 88 #else 89 #define DPRINTF(arg) 90 #endif 91 92 int piix_getclink __P((pciintr_icu_handle_t, int, int *)); 93 int piix_get_intr __P((pciintr_icu_handle_t, int, int *)); 94 int piix_set_intr __P((pciintr_icu_handle_t, int, int)); 95 #ifdef PIIX_DEBUG 96 void piix_pir_dump __P((struct piix_handle *)); 97 #endif 98 99 const struct pciintr_icu piix_pci_icu = { 100 piix_getclink, 101 piix_get_intr, 102 piix_set_intr, 103 piix_get_trigger, 104 piix_set_trigger, 105 }; 106 107 int 108 piix_init(pc, iot, tag, ptagp, phandp) 109 pci_chipset_tag_t pc; 110 bus_space_tag_t iot; 111 pcitag_t tag; 112 pciintr_icu_tag_t *ptagp; 113 pciintr_icu_handle_t *phandp; 114 { 115 struct piix_handle *ph; 116 117 ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT); 118 if (ph == NULL) 119 return (1); 120 121 ph->ph_iot = iot; 122 ph->ph_pc = pc; 123 ph->ph_tag = tag; 124 125 if (bus_space_map(iot, PIIX_REG_ELCR, PIIX_REG_ELCR_SIZE, 0, 126 &ph->ph_elcr_ioh) != 0) { 127 free(ph, M_DEVBUF); 128 return (1); 129 } 130 131 #ifdef PIIX_DEBUG 132 piix_pir_dump(ph); 133 #endif 134 *ptagp = &piix_pci_icu; 135 *phandp = ph; 136 return (0); 137 } 138 139 int 140 piix_getclink(v, link, clinkp) 141 pciintr_icu_handle_t v; 142 int link, *clinkp; 143 { 144 DPRINTF(("PIIX link value 0x%x: ", link)); 145 146 /* Pattern 1: simple. */ 147 if (PIIX_LEGAL_LINK(link - 1)) { 148 *clinkp = link - 1; 149 DPRINTF(("PIRQ %d (simple)\n", *clinkp)); 150 return (0); 151 } 152 153 /* Pattern 2: configuration register offset */ 154 if (link >= 0x60 && link <= 0x63) { 155 *clinkp = link - 0x60; 156 DPRINTF(("PIRQ %d (register offset)\n", *clinkp)); 157 return (0); 158 } 159 160 DPRINTF(("bogus IRQ selection source\n")); 161 return (1); 162 } 163 164 int 165 piix_get_intr(v, clink, irqp) 166 pciintr_icu_handle_t v; 167 int clink, *irqp; 168 { 169 struct piix_handle *ph = v; 170 int shift; 171 pcireg_t reg; 172 173 if (PIIX_LEGAL_LINK(clink) == 0) 174 return (1); 175 176 reg = pci_conf_read(ph->ph_pc, ph->ph_tag, PIIX_CFG_PIRQ); 177 shift = clink << 3; 178 if ((reg >> shift) & PIIX_CFG_PIRQ_NONE) 179 *irqp = I386_PCI_INTERRUPT_LINE_NO_CONNECTION; 180 else 181 *irqp = PIIX_PIRQ(reg, clink); 182 183 return (0); 184 } 185 186 int 187 piix_set_intr(v, clink, irq) 188 pciintr_icu_handle_t v; 189 int clink, irq; 190 { 191 struct piix_handle *ph = v; 192 int shift; 193 pcireg_t reg; 194 195 if (PIIX_LEGAL_LINK(clink) == 0 || PIIX_LEGAL_IRQ(irq) == 0) 196 return (1); 197 198 reg = pci_conf_read(ph->ph_pc, ph->ph_tag, PIIX_CFG_PIRQ); 199 shift = clink << 3; 200 reg &= ~((PIIX_CFG_PIRQ_NONE | PIIX_CFG_PIRQ_MASK) << shift); 201 reg |= irq << shift; 202 pci_conf_write(ph->ph_pc, ph->ph_tag, PIIX_CFG_PIRQ, reg); 203 204 return (0); 205 } 206 207 int 208 piix_get_trigger(v, irq, triggerp) 209 pciintr_icu_handle_t v; 210 int irq, *triggerp; 211 { 212 struct piix_handle *ph = v; 213 int off, bit; 214 u_int8_t elcr; 215 216 if (PIIX_LEGAL_IRQ(irq) == 0) 217 return (1); 218 219 off = (irq > 7) ? 1 : 0; 220 bit = irq & 7; 221 222 elcr = bus_space_read_1(ph->ph_iot, ph->ph_elcr_ioh, off); 223 if (elcr & (1 << bit)) 224 *triggerp = IST_LEVEL; 225 else 226 *triggerp = IST_EDGE; 227 228 return (0); 229 } 230 231 int 232 piix_set_trigger(v, irq, trigger) 233 pciintr_icu_handle_t v; 234 int irq, trigger; 235 { 236 struct piix_handle *ph = v; 237 int off, bit; 238 u_int8_t elcr; 239 240 if (PIIX_LEGAL_IRQ(irq) == 0) 241 return (1); 242 243 off = (irq > 7) ? 1 : 0; 244 bit = irq & 7; 245 246 elcr = bus_space_read_1(ph->ph_iot, ph->ph_elcr_ioh, off); 247 if (trigger == IST_LEVEL) 248 elcr |= (1 << bit); 249 else 250 elcr &= ~(1 << bit); 251 bus_space_write_1(ph->ph_iot, ph->ph_elcr_ioh, off, elcr); 252 253 return (0); 254 } 255 256 #ifdef PIIX_DEBUG 257 void 258 piix_pir_dump(ph) 259 struct piix_handle *ph; 260 { 261 int i, irq; 262 pcireg_t irqs = pci_conf_read(ph->ph_pc, ph->ph_tag, PIIX_CFG_PIRQ); 263 u_int8_t elcr[2]; 264 265 elcr[0] = bus_space_read_1(ph->ph_iot, ph->ph_elcr_ioh, 0); 266 elcr[1] = bus_space_read_1(ph->ph_iot, ph->ph_elcr_ioh, 1); 267 268 for (i = 0; i < 4; i++) { 269 irq = PIIX_PIRQ(irqs, i); 270 if (irq & PIIX_CFG_PIRQ_NONE) 271 printf("PIIX PIRQ %d: irq none (0x%x)\n", i, irq); 272 else 273 printf("PIIX PIRQ %d: irq %d\n", i, irq); 274 } 275 printf("PIIX irq:"); 276 for (i = 0; i < 16; i++) 277 printf(" %2d", i); 278 printf("\n"); 279 printf(" trigger:"); 280 for (i = 0; i < 16; i++) 281 printf(" %c", (elcr[(i & 8) ? 1 : 0] & (1 << (i & 7))) ? 282 'L' : 'E'); 283 printf("\n"); 284 } 285 #endif /* PIIX_DEBUG */ 286