sys/arch/i386/pci/amd756.c

   1 /*      $NetBSD: amd756.c,v 1.7 2006/11/16 01:32:38 christos Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1999, 2001 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  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1999, by UCHIYAMA Yasushi
  35  * All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. The name of the developer may NOT be used to endorse or promote products
  43  *    derived from this software without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 /*
  59  * Support for the Advanced Micro Devices AMD756 Peripheral Bus Controller.
  60  */
  61
  62 #include <sys/cdefs.h>
  63 __KERNEL_RCSID(0, "$NetBSD: amd756.c,v 1.7 2006/11/16 01:32:38 christos Exp $");
  64
  65 #include <sys/param.h>
  66 #include <sys/systm.h>
  67 #include <sys/device.h>
  68 #include <sys/malloc.h>
  69
  70 #include <machine/intr.h>
  71 #include <machine/bus.h>
  72
  73 #include <dev/pci/pcivar.h>
  74 #include <dev/pci/pcireg.h>
  75 #include <dev/pci/pcidevs.h>
  76
  77 #include <i386/pci/pci_intr_fixup.h>
  78 #include <i386/pci/amd756reg.h>
  79
  80 struct amd756_handle {
  81         bus_space_tag_t ph_iot;
  82         bus_space_handle_t ph_regs_ioh;
  83         pci_chipset_tag_t ph_pc;
  84         pcitag_t ph_tag;
  85 };
  86
  87 int     amd756_getclink(pciintr_icu_handle_t, int, int *);
  88 int     amd756_get_intr(pciintr_icu_handle_t, int, int *);
  89 int     amd756_set_intr(pciintr_icu_handle_t, int, int);
  90 int     amd756_get_trigger(pciintr_icu_handle_t, int, int *);
  91 int     amd756_set_trigger(pciintr_icu_handle_t, int, int);
  92 #ifdef AMD756_DEBUG
  93 static void     amd756_pir_dump(struct amd756_handle *);
  94 #endif
  95
  96 const struct pciintr_icu amd756_pci_icu = {
  97         amd756_getclink,
  98         amd756_get_intr,
  99         amd756_set_intr,
 100         amd756_get_trigger,
 101         amd756_set_trigger,
 102 };
 103
 104
 105 int
 106 amd756_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
 107     pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
 108 {
 109         struct amd756_handle *ph;
 110
 111         ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT);
 112         if (ph == NULL)
 113                 return (1);
 114
 115         ph->ph_iot = iot;
 116         ph->ph_pc = pc;
 117         ph->ph_tag = tag;
 118
 119         *ptagp = &amd756_pci_icu;
 120         *phandp = ph;
 121
 122 #ifdef AMD756_DEBUG
 123         amd756_pir_dump(ph);
 124 #endif
 125
 126         return (0);
 127 }
 128
 129 int
 130 amd756_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
 131 {
 132         if (AMD756_LEGAL_LINK(link - 1) == 0)
 133                 return (1);
 134
 135         *clinkp = link - 1;
 136
 137         return (0);
 138 }
 139
 140 int
 141 amd756_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
 142 {
 143         struct amd756_handle *ph = v;
 144         pcireg_t reg;
 145         int val;
 146
 147         if (AMD756_LEGAL_LINK(clink) == 0)
 148                 return (1);
 149
 150         reg = AMD756_GET_PIIRQSEL(ph);
 151         val = (reg >> (4 * clink)) & 0x0f;
 152         *irqp = (val == 0) ?
 153             X86_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
 154
 155         return (0);
 156 }
 157
 158 int
 159 amd756_set_intr(pciintr_icu_handle_t v, int clink, int irq)
 160 {
 161         struct amd756_handle *ph = v;
 162         int val;
 163         pcireg_t reg;
 164
 165         if (AMD756_LEGAL_LINK(clink) == 0 || AMD756_LEGAL_IRQ(irq) == 0)
 166                 return (1);
 167
 168         reg = AMD756_GET_PIIRQSEL(ph);
 169         amd756_get_intr(v, clink, &val);
 170         reg &= ~(0x000f << (4 * clink));
 171         reg |= irq << (4 * clink);
 172         AMD756_SET_PIIRQSEL(ph, reg);
 173
 174         return (0);
 175 }
 176
 177 int
 178 amd756_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp)
 179 {
 180         struct amd756_handle *ph = v;
 181         int i, pciirq;
 182         pcireg_t reg;
 183
 184         if (AMD756_LEGAL_IRQ(irq) == 0)
 185                 return (1);
 186
 187         for (i = 0; i <= 3; i++) {
 188                 amd756_get_intr(v, i, &pciirq);
 189                 if (pciirq == irq) {
 190                         reg = AMD756_GET_EDGESEL(ph);
 191                         if (reg & (1 << i))
 192                                 *triggerp = IST_EDGE;
 193                         else
 194                                 *triggerp = IST_LEVEL;
 195                         break;
 196                 }
 197         }
 198
 199         return (0);
 200 }
 201
 202 int
 203 amd756_set_trigger(pciintr_icu_handle_t v, int irq, int trigger)
 204 {
 205         struct amd756_handle *ph = v;
 206         int i, pciirq;
 207         pcireg_t reg;
 208
 209         if (AMD756_LEGAL_IRQ(irq) == 0)
 210                 return (1);
 211
 212         for (i = 0; i <= 3; i++) {
 213                 amd756_get_intr(v, i, &pciirq);
 214                 if (pciirq == irq) {
 215                         reg = AMD756_GET_PIIRQSEL(ph);
 216                         if (trigger == IST_LEVEL)
 217                                 reg &= ~(1 << (4 * i));
 218                         else
 219                                 reg |= 1 << (4 * i);
 220                         AMD756_SET_PIIRQSEL(ph, reg);
 221                         break;
 222                 }
 223         }
 224
 225         return (0);
 226 }
 227
 228 #ifdef AMD756_DEBUG
 229 static void
 230 amd756_pir_dump(struct amd756_handle *ph)
 231 {
 232         int a, b;
 233
 234         printf ("AMD756 PCI INTERRUPT ROUTING REGISTERS:\n");
 235
 236         a = AMD756_GET_EDGESEL(ph);
 237         b = AMD756_GET_PIIRQSEL(ph);
 238
 239         printf ("TRIGGER: %02x, ROUTING: %04x\n", a, b);
 240 }
 241 #endif