sys/arch/i386/pci/via8231.c

   1 /*      $NetBSD: via8231.c,v 1.2 2006/05/15 00:36:55 christos 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  *
  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  * Copyright (c) 2005, by Michael Shalayeff
  35  * Copyright (c) 2003, by Matthew Gream
  36  * Copyright (c) 1999, by UCHIYAMA Yasushi
  37  * All rights reserved.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. The name of the developer may NOT be used to endorse or promote products
  45  *    derived from this software without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  */
  59
  60 /*
  61  * Support for the VIA Technologies Inc. VIA VT823[1357] PCI to ISA Bridge
  62  * Based upon documentation:
  63  * 1. VIA VT8231 South Bridge, Revision 1.85 (March 11, 2002), pg 73
  64  * 2. VIA VT8237R South Bridge, Revision 2.06 (December 15, 2004), pg 100
  65  * Derived from amd756.c
  66  */
  67
  68 #include <sys/cdefs.h>
  69 __KERNEL_RCSID(0, "$NetBSD: via8231.c,v 1.2 2006/05/15 00:36:55 christos Exp $");
  70
  71 #include <sys/param.h>
  72 #include <sys/systm.h>
  73 #include <sys/device.h>
  74 #include <sys/malloc.h>
  75
  76 #include <machine/intr.h>
  77 #include <machine/bus.h>
  78
  79 #include <dev/pci/pcivar.h>
  80 #include <dev/pci/pcireg.h>
  81 #include <dev/pci/pcidevs.h>
  82
  83 #include <i386/pci/pci_intr_fixup.h>
  84 #include <i386/pci/via8231reg.h>
  85
  86 struct via8231_handle {
  87         bus_space_tag_t ph_iot;
  88         bus_space_handle_t ph_regs_ioh;
  89         pci_chipset_tag_t ph_pc;
  90         pcitag_t ph_tag;
  91         int flags;
  92 #define VT8237  0x0001
  93 };
  94
  95 int via8231_getclink(pciintr_icu_handle_t, int, int *);
  96 int via8231_get_intr(pciintr_icu_handle_t, int, int *);
  97 int via8231_set_intr(pciintr_icu_handle_t, int, int);
  98 int via8231_get_trigger(pciintr_icu_handle_t, int, int *);
  99 int via8231_set_trigger(pciintr_icu_handle_t, int, int);
 100 #ifdef VIA8231_DEBUG
 101 static void via8231_pir_dump(const char*, struct via8231_handle *);
 102 #endif
 103
 104 const struct pciintr_icu via8231_pci_icu = {
 105         via8231_getclink,
 106         via8231_get_intr,
 107         via8231_set_intr,
 108         via8231_get_trigger,
 109         via8231_set_trigger,
 110 };
 111
 112 struct mask_shft_pair {
 113         int mask;
 114         int shft;
 115 };
 116
 117 static const struct mask_shft_pair via8231_routing_cnfg[VIA8231_LINK_MAX+1] = {
 118         { 0x0f,  0+4 }, /*PINTA#*/
 119         { 0x0f,  8+0 }, /*PINTB#*/
 120         { 0x0f,  8+4 }, /*PINTC#*/
 121         { 0x0f, 16+4 }  /*PINTD#*/
 122 };
 123
 124 #define VIA8231_GET_TRIGGER_CNFG(reg, pirq) \
 125         ((reg) & (1 << (3 - (clink & 3))))
 126 #define VIA8231_SET_TRIGGER_CNFG(reg, clink, cfg) \
 127         (((reg) & ~(1 << (3 - (clink & 3)))) | ((cfg) << (3 - (clink & 3))))
 128
 129 #define VIA8231_GET_ROUTING_CNFG(reg, pirq) \
 130         (((reg) >> via8231_routing_cnfg[(pirq)].shft) & \
 131             via8231_routing_cnfg[(pirq)].mask)
 132
 133 #define VIA8231_SET_ROUTING_CNFG(reg, pirq, cfg) \
 134         (((reg) & ~(via8231_routing_cnfg[(pirq)].mask << \
 135             via8231_routing_cnfg[(pirq)].shft)) | \
 136             (((cfg) & via8231_routing_cnfg[(pirq)].mask) << \
 137             via8231_routing_cnfg[(pirq)].shft))
 138
 139 int
 140 via8231_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
 141     pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
 142 {
 143         struct via8231_handle *ph;
 144         pcireg_t id;
 145
 146         ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT);
 147         if (ph == NULL)
 148                 return (1);
 149
 150         ph->ph_iot = iot;
 151         ph->ph_pc = pc;
 152         ph->ph_tag = tag;
 153         id = pci_conf_read(pc, tag, PCI_ID_REG);
 154         ph->flags = PCI_VENDOR(id) == PCI_VENDOR_VIATECH &&
 155              PCI_PRODUCT(id) == PCI_PRODUCT_VIATECH_VT8231? 0 : VT8237;
 156
 157         *ptagp = &via8231_pci_icu;
 158         *phandp = ph;
 159
 160 #ifdef VIA8231_DEBUG
 161         via8231_pir_dump("via8231_init", ph);
 162 #endif
 163
 164         return 0;
 165 }
 166
 167 int
 168 via8231_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
 169 {
 170         struct via8231_handle *ph = v;
 171
 172         if ((ph->flags & VT8237) && !VIA8237_LINK_LEGAL(link - 1))
 173                 return (1);
 174
 175         if (!(ph->flags & VT8237) && !VIA8231_LINK_LEGAL(link - 1))
 176                 return (1);
 177
 178         *clinkp = link - 1;
 179         return (0);
 180 }
 181
 182 int
 183 via8231_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
 184 {
 185         struct via8231_handle *ph = v;
 186         int reg, val;
 187
 188         if (VIA8237_LINK_LEGAL(clink) == 0)
 189                 return (1);
 190
 191         if (VIA8231_LINK_LEGAL(clink)) {
 192                 reg = VIA8231_GET_ROUTING(ph);
 193                 val = VIA8231_GET_ROUTING_CNFG(reg, clink);
 194         } else {
 195                 reg = VIA8237_GET_ROUTING(ph);
 196                 val = (reg >> ((clink & 3) * 4)) & 0xf;
 197         }
 198
 199         *irqp = (val == VIA8231_ROUTING_CNFG_DISABLED) ?
 200             X86_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
 201
 202         return (0);
 203 }
 204
 205 int
 206 via8231_set_intr(pciintr_icu_handle_t v, int clink, int irq)
 207 {
 208         struct via8231_handle *ph = v;
 209         int reg;
 210
 211         if (VIA8237_LINK_LEGAL(clink) == 0 || VIA8231_PIRQ_LEGAL(irq) == 0)
 212                 return (1);
 213
 214 #ifdef VIA8231_DEBUG
 215         printf("via8231_set_intr: link(%02x) --> irq(%02x)\n", clink, irq);
 216         via8231_pir_dump("via8231_set_intr: ", ph);
 217 #endif
 218
 219         if (VIA8231_LINK_LEGAL(clink)) {
 220                 reg = VIA8231_GET_ROUTING(ph);
 221                 VIA8231_SET_ROUTING(ph,
 222                     VIA8231_SET_ROUTING_CNFG(reg, clink, irq));
 223         } else {
 224                 reg = VIA8237_GET_ROUTING(ph);
 225                 VIA8237_SET_ROUTING(ph, (reg & ~(0xf << (clink & 3))) |
 226                     ((irq & 0xf) << (clink & 3)));
 227         }
 228
 229         return (0);
 230 }
 231
 232 int
 233 via8231_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp)
 234 {
 235         struct via8231_handle *ph = v;
 236         int reg, clink, m, pciirq = 0;  /* XXX: GCC */
 237
 238         if (VIA8231_PIRQ_LEGAL(irq) == 0)
 239                 return (1);
 240
 241         m = ph->flags & VT8237? VIA8237_LINK_MAX : VIA8231_LINK_MAX;
 242         for (clink = 0; clink <= m; clink++) {
 243                 via8231_get_intr(v, clink, &pciirq);
 244                 if (pciirq == irq) {
 245                         reg = VIA8231_LINK_LEGAL(clink)?
 246                             VIA8231_GET_TRIGGER(ph):
 247                             VIA8237_GET_TRIGGER(ph);
 248                         *triggerp = VIA8231_GET_TRIGGER_CNFG(reg, clink)?
 249                             IST_EDGE : IST_LEVEL;
 250                         return (0);
 251                 }
 252         }
 253
 254         return (1);
 255 }
 256
 257 int
 258 via8231_set_trigger(pciintr_icu_handle_t v, int irq, int trigger)
 259 {
 260         struct via8231_handle *ph = v;
 261         int reg, clink, m, pciirq;
 262
 263         if (VIA8231_PIRQ_LEGAL(irq) == 0 || VIA8231_TRIG_LEGAL(trigger) == 0)
 264                 return (1);
 265
 266 #ifdef VIA8231_DEBUG
 267         printf("via8231_set_trig: irq(%02x) --> trig(%02x)\n", irq, trigger);
 268         via8231_pir_dump("via8231_set_trig: ", ph);
 269 #endif
 270
 271         m = ph->flags & VT8237? VIA8237_LINK_MAX : VIA8231_LINK_MAX;
 272         for (clink = 0; clink <= VIA8231_LINK_MAX; clink++) {
 273                 via8231_get_intr(v, clink, &pciirq);
 274                 if (pciirq == irq) {
 275                         reg = VIA8231_LINK_LEGAL(clink)?
 276                             VIA8231_GET_TRIGGER(ph):
 277                             VIA8237_GET_TRIGGER(ph);
 278                         switch (trigger) {
 279                         case IST_LEVEL:
 280                                 reg = VIA8231_SET_TRIGGER_CNFG(reg, clink,
 281                                         VIA8231_TRIGGER_CNFG_LEVEL);
 282                                 break;
 283                         case IST_EDGE:
 284                                 reg = VIA8231_SET_TRIGGER_CNFG(reg, clink,
 285                                         VIA8231_TRIGGER_CNFG_EDGE);
 286                                 break;
 287                         default:
 288                                 return (1);
 289                         }
 290                         if (VIA8231_LINK_LEGAL(clink))
 291                                 VIA8231_SET_TRIGGER(ph, reg);
 292                         else
 293                                 VIA8237_SET_TRIGGER(ph, reg);
 294                         return (0);
 295                 }
 296         }
 297
 298         return (1);
 299 }
 300
 301 #ifdef VIA8231_DEBUG
 302 static void
 303 via8231_pir_dump(const char *m, struct via8231_handle *ph)
 304 {
 305         int a, b;
 306
 307         a = VIA8231_GET_TRIGGER(ph);
 308         b = VIA8231_GET_ROUTING(ph);
 309
 310         printf("%s STATE: trigger(%02x), routing(%08x)\n", m, a, b);
 311 }
 312 #endif