root/arch/i386/pci/via8231.c

DEFINITIONS

1. via8231_init
2. via8231_getclink
3. via8231_get_intr
4. via8231_set_intr
5. via8231_get_trigger
6. via8231_set_trigger
7. via8231_pir_dump

    1 /*      $OpenBSD: via8231.c,v 1.7 2006/09/19 11:06:34 jsg Exp $ */
    3 /*-
    4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *     This product includes software developed by the NetBSD
   22  *     Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 /*
   40  * Copyright (c) 2005, by Michael Shalayeff
   41  * Copyright (c) 2003, by Matthew Gream
   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  */
   66 /*
   67  * Support for the VIA Technologies Inc. VIA8231 PCI to ISA Bridge
   68  * Based upon documentation:
   69  * 1. VIA VT8231 South Bridge, Revision 1.85 (March 11, 2002), pg 73
   70  * 2. VIA VT8237R South Bridge, Revision 2.06 (December 15, 2004), pg 100
   71  * Derived from amd756.c
   72  */
   74 #include <sys/param.h>
   75 #include <sys/systm.h>
   76 #include <sys/device.h>
   77 #include <sys/malloc.h>
   79 #include <machine/intr.h>
   80 #include <machine/bus.h>
   82 #include <dev/pci/pcivar.h>
   83 #include <dev/pci/pcireg.h>
   84 #include <dev/pci/pcidevs.h>
   86 #include <i386/pci/pcibiosvar.h>
   87 #include <i386/pci/via8231reg.h>
   89 struct via8231_handle {
bus_space_tag_t ph_iot;
bus_space_handle_t ph_regs_ioh;
pci_chipset_tag_t ph_pc;
pcitag_t ph_tag;
   94         int flags;
   95 #define VT8237  0x0001
   96 };
   98 int via8231_getclink(pciintr_icu_handle_t, int, int *);
   99 int via8231_get_intr(pciintr_icu_handle_t, int, int *);
  100 int via8231_set_intr(pciintr_icu_handle_t, int, int);
  101 int via8231_get_trigger(pciintr_icu_handle_t, int, int *);
  102 int via8231_set_trigger(pciintr_icu_handle_t, int, int);
  103 #ifdef VIA8231_DEBUG
  104 static void via8231_pir_dump(const char*, struct via8231_handle *);
  105 #endif
  107 const struct pciintr_icu via8231_pci_icu = {
via8231_getclink,
via8231_get_intr,
via8231_set_intr,
via8231_get_trigger,
via8231_set_trigger,
  113 };
  115 struct mask_shft_pair {
  116         int mask;
  117         int shft;
  118 };
  120 static const struct mask_shft_pair via8231_routing_cnfg[VIA8231_LINK_MAX+1] = {
  121         { 0x0f,  0+4 }, /*PINTA#*/
  122         { 0x0f,  8+0 }, /*PINTB#*/
  123         { 0x0f,  8+4 }, /*PINTC#*/
  124         { 0x0f, 16+4 }  /*PINTD#*/
  125 };
  127 #define VIA8231_GET_TRIGGER_CNFG(reg, pirq) \
  128         ((reg) & (1 << (3 - (clink & 3))))
  129 #define VIA8231_SET_TRIGGER_CNFG(reg, clink, cfg) \
  130         (((reg) & ~(1 << (3 - (clink & 3)))) | ((cfg) << (3 - (clink & 3))))
  132 #define VIA8231_GET_ROUTING_CNFG(reg, pirq) \
  133         (((reg) >> via8231_routing_cnfg[(pirq)].shft) & \
via8231_routing_cnfg[(pirq)].mask)
  136 #define VIA8231_SET_ROUTING_CNFG(reg, pirq, cfg) \
  137         (((reg) & ~(via8231_routing_cnfg[(pirq)].mask << \
via8231_routing_cnfg[(pirq)].shft)) | \
  139             (((cfg) & via8231_routing_cnfg[(pirq)].mask) << \
via8231_routing_cnfg[(pirq)].shft))
  142 int
via8231_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
  145 {
  146         struct via8231_handle *ph;
pcireg_t id;
ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT);
  150         if (ph == NULL)
  151                 return (1);
ph->ph_iot = iot;
ph->ph_pc = pc;
ph->ph_tag = tag;
id = pci_conf_read(pc, tag, PCI_ID_REG);
ph->flags = PCI_VENDOR(id) == PCI_VENDOR_VIATECH &&
PCI_PRODUCT(id) == PCI_PRODUCT_VIATECH_VT8231_ISA? 0 : VT8237;
  160         *ptagp = &via8231_pci_icu;
  161         *phandp = ph;
  163 #ifdef VIA8231_DEBUG
via8231_pir_dump("via8231_init", ph);
  165 #endif
  167         return 0;
  168 }
  170 int
via8231_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
  172 {
  173         struct via8231_handle *ph = v;
  175         if ((ph->flags & VT8237) && !VIA8237_LINK_LEGAL(link - 1))
  176                 return (1);
  178         if (!(ph->flags & VT8237) && !VIA8231_LINK_LEGAL(link - 1))
  179                 return (1);
  181         *clinkp = link - 1;
  182         return (0);
  183 }
  185 int
via8231_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
  187 {
  188         struct via8231_handle *ph = v;
  189         int reg, val;
  191         if (VIA8237_LINK_LEGAL(clink) == 0)
  192                 return (1);
  194         if (VIA8231_LINK_LEGAL(clink)) {
reg = VIA8231_GET_ROUTING(ph);
val = VIA8231_GET_ROUTING_CNFG(reg, clink);
  197         } else {
reg = VIA8237_GET_ROUTING(ph);
val = (reg >> ((clink & 3) * 4)) & 0xf;
  200         }
  202         *irqp = (val == VIA8231_ROUTING_CNFG_DISABLED) ?
I386_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
  205         return (0);
  206 }
  208 int
via8231_set_intr(pciintr_icu_handle_t v, int clink, int irq)
  210 {
  211         struct via8231_handle *ph = v;
  212         int reg;
  214         if (VIA8237_LINK_LEGAL(clink) == 0 || VIA8231_PIRQ_LEGAL(irq) == 0)
  215                 return (1);
  217 #ifdef VIA8231_DEBUG
printf("via8231_set_intr: link(%02x) --> irq(%02x)\n", clink, irq);
via8231_pir_dump("via8231_set_intr: ", ph);
  220 #endif
  222         if (VIA8231_LINK_LEGAL(clink)) {
reg = VIA8231_GET_ROUTING(ph);
VIA8231_SET_ROUTING(ph,
VIA8231_SET_ROUTING_CNFG(reg, clink, irq));
  226         } else {
reg = VIA8237_GET_ROUTING(ph);
VIA8237_SET_ROUTING(ph, (reg & ~(0xf << (clink & 3))) |
  229                     ((irq & 0xf) << (clink & 3)));
  230         }
  232         return (0);
  233 }
  235 int
via8231_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp)
  237 {
  238         struct via8231_handle *ph = v;
  239         int reg, clink, max, pciirq;
  241         if (VIA8231_PIRQ_LEGAL(irq) == 0)
  242                 return (1);
max = ph->flags & VT8237? VIA8237_LINK_MAX : VIA8231_LINK_MAX;
  245         for (clink = 0; clink <= max; clink++) {
via8231_get_intr(v, clink, &pciirq);
  247                 if (pciirq == irq) {
reg = VIA8231_LINK_LEGAL(clink)?
VIA8231_GET_TRIGGER(ph):
VIA8237_GET_TRIGGER(ph);
  251                         *triggerp = VIA8231_GET_TRIGGER_CNFG(reg, clink)?
IST_EDGE : IST_LEVEL;
  253                         return (0);
  254                 }
  255         }
  257         return (1);
  258 }
  260 int
via8231_set_trigger(pciintr_icu_handle_t v, int irq, int trigger)
  262 {
  263         struct via8231_handle *ph = v;
  264         int reg, clink, max, pciirq;
  266         if (VIA8231_PIRQ_LEGAL(irq) == 0 || VIA8231_TRIG_LEGAL(trigger) == 0)
  267                 return (1);
  269 #ifdef VIA8231_DEBUG
printf("via8231_set_trig: irq(%02x) --> trig(%02x)\n", irq, trigger);
via8231_pir_dump("via8231_set_trig: ", ph);
  272 #endif
max = ph->flags & VT8237? VIA8237_LINK_MAX : VIA8231_LINK_MAX;
  275         for (clink = 0; clink <= VIA8231_LINK_MAX; clink++) {
via8231_get_intr(v, clink, &pciirq);
  277                 if (pciirq == irq) {
reg = VIA8231_LINK_LEGAL(clink)?
VIA8231_GET_TRIGGER(ph):
VIA8237_GET_TRIGGER(ph);
  281                         switch (trigger) {
  282                         case IST_LEVEL:
reg = VIA8231_SET_TRIGGER_CNFG(reg, clink,
VIA8231_TRIGGER_CNFG_LEVEL);
  285                                 break;
  286                         case IST_EDGE:
reg = VIA8231_SET_TRIGGER_CNFG(reg, clink,
VIA8231_TRIGGER_CNFG_EDGE);
  289                                 break;
  290                         default:
  291                                 return (1);
  292                         }
  293                         if (VIA8231_LINK_LEGAL(clink))
VIA8231_SET_TRIGGER(ph, reg);
  295                         else
VIA8237_SET_TRIGGER(ph, reg);
  297                         return (0);
  298                 }
  299         }
  301         return (1);
  302 }
  304 #ifdef VIA8231_DEBUG
  305 static void
via8231_pir_dump(const char *m, struct via8231_handle *ph)
  307 {
  308         int a, b;
a = VIA8231_GET_TRIGGER(ph);
b = VIA8231_GET_ROUTING(ph);
printf("%s STATE: trigger(%02x), routing(%08x)\n", m, a, b);
  314 }
  315 #endif