via8231.c revision 1.1.2.2
1/* $NetBSD: via8231.c,v 1.1.2.2 2006/01/15 10:02:38 yamt Exp $ */ 2/* OpenBSD: via8231.c,v 1.6 2005/10/27 16:41:06 mickey 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 * Copyright (c) 2005, by Michael Shalayeff 42 * Copyright (c) 2003, by Matthew Gream 43 * Copyright (c) 1999, by UCHIYAMA Yasushi 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. The name of the developer may NOT be used to endorse or promote products 52 * derived from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 */ 66 67/* 68 * Support for the VIA Technologies Inc. VIA VT823[1357] PCI to ISA Bridge 69 * Based upon documentation: 70 * 1. VIA VT8231 South Bridge, Revision 1.85 (March 11, 2002), pg 73 71 * 2. VIA VT8237R South Bridge, Revision 2.06 (December 15, 2004), pg 100 72 * Derived from amd756.c 73 */ 74 75#include <sys/cdefs.h> 76__KERNEL_RCSID(0, "$NetBSD: via8231.c,v 1.1.2.2 2006/01/15 10:02:38 yamt Exp $"); 77 78#include <sys/param.h> 79#include <sys/systm.h> 80#include <sys/device.h> 81#include <sys/malloc.h> 82 83#include <machine/intr.h> 84#include <machine/bus.h> 85 86#include <dev/pci/pcivar.h> 87#include <dev/pci/pcireg.h> 88#include <dev/pci/pcidevs.h> 89 90#include <i386/pci/pci_intr_fixup.h> 91#include <i386/pci/via8231reg.h> 92 93struct via8231_handle { 94 bus_space_tag_t ph_iot; 95 bus_space_handle_t ph_regs_ioh; 96 pci_chipset_tag_t ph_pc; 97 pcitag_t ph_tag; 98 int flags; 99#define VT8237 0x0001 100}; 101 102int via8231_getclink(pciintr_icu_handle_t, int, int *); 103int via8231_get_intr(pciintr_icu_handle_t, int, int *); 104int via8231_set_intr(pciintr_icu_handle_t, int, int); 105int via8231_get_trigger(pciintr_icu_handle_t, int, int *); 106int via8231_set_trigger(pciintr_icu_handle_t, int, int); 107#ifdef VIA8231_DEBUG 108static void via8231_pir_dump(const char*, struct via8231_handle *); 109#endif 110 111const struct pciintr_icu via8231_pci_icu = { 112 via8231_getclink, 113 via8231_get_intr, 114 via8231_set_intr, 115 via8231_get_trigger, 116 via8231_set_trigger, 117}; 118 119struct mask_shft_pair { 120 int mask; 121 int shft; 122}; 123 124static const struct mask_shft_pair via8231_routing_cnfg[VIA8231_LINK_MAX+1] = { 125 { 0x0f, 0+4 }, /*PINTA#*/ 126 { 0x0f, 8+0 }, /*PINTB#*/ 127 { 0x0f, 8+4 }, /*PINTC#*/ 128 { 0x0f, 16+4 } /*PINTD#*/ 129}; 130 131#define VIA8231_GET_TRIGGER_CNFG(reg, pirq) \ 132 ((reg) & (1 << (3 - (clink & 3)))) 133#define VIA8231_SET_TRIGGER_CNFG(reg, clink, cfg) \ 134 (((reg) & ~(1 << (3 - (clink & 3)))) | ((cfg) << (3 - (clink & 3)))) 135 136#define VIA8231_GET_ROUTING_CNFG(reg, pirq) \ 137 (((reg) >> via8231_routing_cnfg[(pirq)].shft) & \ 138 via8231_routing_cnfg[(pirq)].mask) 139 140#define VIA8231_SET_ROUTING_CNFG(reg, pirq, cfg) \ 141 (((reg) & ~(via8231_routing_cnfg[(pirq)].mask << \ 142 via8231_routing_cnfg[(pirq)].shft)) | \ 143 (((cfg) & via8231_routing_cnfg[(pirq)].mask) << \ 144 via8231_routing_cnfg[(pirq)].shft)) 145 146int 147via8231_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag, 148 pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp) 149{ 150 struct via8231_handle *ph; 151 pcireg_t id; 152 153 ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT); 154 if (ph == NULL) 155 return (1); 156 157 ph->ph_iot = iot; 158 ph->ph_pc = pc; 159 ph->ph_tag = tag; 160 id = pci_conf_read(pc, tag, PCI_ID_REG); 161 ph->flags = PCI_VENDOR(id) == PCI_VENDOR_VIATECH && 162 PCI_PRODUCT(id) == PCI_PRODUCT_VIATECH_VT8231? 0 : VT8237; 163 164 *ptagp = &via8231_pci_icu; 165 *phandp = ph; 166 167#ifdef VIA8231_DEBUG 168 via8231_pir_dump("via8231_init", ph); 169#endif 170 171 return 0; 172} 173 174int 175via8231_getclink(pciintr_icu_handle_t v, int link, int *clinkp) 176{ 177 struct via8231_handle *ph = v; 178 179 if ((ph->flags & VT8237) && !VIA8237_LINK_LEGAL(link - 1)) 180 return (1); 181 182 if (!(ph->flags & VT8237) && !VIA8231_LINK_LEGAL(link - 1)) 183 return (1); 184 185 *clinkp = link - 1; 186 return (0); 187} 188 189int 190via8231_get_intr(pciintr_icu_handle_t v, int clink, int *irqp) 191{ 192 struct via8231_handle *ph = v; 193 int reg, val; 194 195 if (VIA8237_LINK_LEGAL(clink) == 0) 196 return (1); 197 198 if (VIA8231_LINK_LEGAL(clink)) { 199 reg = VIA8231_GET_ROUTING(ph); 200 val = VIA8231_GET_ROUTING_CNFG(reg, clink); 201 } else { 202 reg = VIA8237_GET_ROUTING(ph); 203 val = (reg >> ((clink & 3) * 4)) & 0xf; 204 } 205 206 *irqp = (val == VIA8231_ROUTING_CNFG_DISABLED) ? 207 X86_PCI_INTERRUPT_LINE_NO_CONNECTION : val; 208 209 return (0); 210} 211 212int 213via8231_set_intr(pciintr_icu_handle_t v, int clink, int irq) 214{ 215 struct via8231_handle *ph = v; 216 int reg; 217 218 if (VIA8237_LINK_LEGAL(clink) == 0 || VIA8231_PIRQ_LEGAL(irq) == 0) 219 return (1); 220 221#ifdef VIA8231_DEBUG 222 printf("via8231_set_intr: link(%02x) --> irq(%02x)\n", clink, irq); 223 via8231_pir_dump("via8231_set_intr: ", ph); 224#endif 225 226 if (VIA8231_LINK_LEGAL(clink)) { 227 reg = VIA8231_GET_ROUTING(ph); 228 VIA8231_SET_ROUTING(ph, 229 VIA8231_SET_ROUTING_CNFG(reg, clink, irq)); 230 } else { 231 reg = VIA8237_GET_ROUTING(ph); 232 VIA8237_SET_ROUTING(ph, (reg & ~(0xf << (clink & 3))) | 233 ((irq & 0xf) << (clink & 3))); 234 } 235 236 return (0); 237} 238 239int 240via8231_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp) 241{ 242 struct via8231_handle *ph = v; 243 int reg, clink, m, pciirq; 244 245 if (VIA8231_PIRQ_LEGAL(irq) == 0) 246 return (1); 247 248 m = ph->flags & VT8237? VIA8237_LINK_MAX : VIA8231_LINK_MAX; 249 for (clink = 0; clink <= m; clink++) { 250 via8231_get_intr(v, clink, &pciirq); 251 if (pciirq == irq) { 252 reg = VIA8231_LINK_LEGAL(clink)? 253 VIA8231_GET_TRIGGER(ph): 254 VIA8237_GET_TRIGGER(ph); 255 *triggerp = VIA8231_GET_TRIGGER_CNFG(reg, clink)? 256 IST_EDGE : IST_LEVEL; 257 return (0); 258 } 259 } 260 261 return (1); 262} 263 264int 265via8231_set_trigger(pciintr_icu_handle_t v, int irq, int trigger) 266{ 267 struct via8231_handle *ph = v; 268 int reg, clink, m, pciirq; 269 270 if (VIA8231_PIRQ_LEGAL(irq) == 0 || VIA8231_TRIG_LEGAL(trigger) == 0) 271 return (1); 272 273#ifdef VIA8231_DEBUG 274 printf("via8231_set_trig: irq(%02x) --> trig(%02x)\n", irq, trigger); 275 via8231_pir_dump("via8231_set_trig: ", ph); 276#endif 277 278 m = ph->flags & VT8237? VIA8237_LINK_MAX : VIA8231_LINK_MAX; 279 for (clink = 0; clink <= VIA8231_LINK_MAX; clink++) { 280 via8231_get_intr(v, clink, &pciirq); 281 if (pciirq == irq) { 282 reg = VIA8231_LINK_LEGAL(clink)? 283 VIA8231_GET_TRIGGER(ph): 284 VIA8237_GET_TRIGGER(ph); 285 switch (trigger) { 286 case IST_LEVEL: 287 reg = VIA8231_SET_TRIGGER_CNFG(reg, clink, 288 VIA8231_TRIGGER_CNFG_LEVEL); 289 break; 290 case IST_EDGE: 291 reg = VIA8231_SET_TRIGGER_CNFG(reg, clink, 292 VIA8231_TRIGGER_CNFG_EDGE); 293 break; 294 default: 295 return (1); 296 } 297 if (VIA8231_LINK_LEGAL(clink)) 298 VIA8231_SET_TRIGGER(ph, reg); 299 else 300 VIA8237_SET_TRIGGER(ph, reg); 301 return (0); 302 } 303 } 304 305 return (1); 306} 307 308#ifdef VIA8231_DEBUG 309static void 310via8231_pir_dump(const char *m, struct via8231_handle *ph) 311{ 312 int a, b; 313 314 a = VIA8231_GET_TRIGGER(ph); 315 b = VIA8231_GET_ROUTING(ph); 316 317 printf("%s STATE: trigger(%02x), routing(%08x)\n", m, a, b); 318} 319#endif 320