sys/arch/alpha/pci/pci_2100_a50.c

   1 /* $NetBSD: pci_2100_a50.c,v 1.35 2009/03/14 21:04:02 dsl Exp $ */
   2
   3 /*
   4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
   5  * All rights reserved.
   6  *
   7  * Author: Chris G. Demetriou
   8  *
   9  * Permission to use, copy, modify and distribute this software and
  10  * its documentation is hereby granted, provided that both the copyright
  11  * notice and this permission notice appear in all copies of the
  12  * software, derivative works or modified versions, and any portions
  13  * thereof, and that both notices appear in supporting documentation.
  14  *
  15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  18  *
  19  * Carnegie Mellon requests users of this software to return to
  20  *
  21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  22  *  School of Computer Science
  23  *  Carnegie Mellon University
  24  *  Pittsburgh PA 15213-3890
  25  *
  26  * any improvements or extensions that they make and grant Carnegie the
  27  * rights to redistribute these changes.
  28  */
  29
  30 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  31
  32 __KERNEL_RCSID(0, "$NetBSD: pci_2100_a50.c,v 1.35 2009/03/14 21:04:02 dsl Exp $");
  33
  34 #include <sys/types.h>
  35 #include <sys/param.h>
  36 #include <sys/time.h>
  37 #include <sys/systm.h>
  38 #include <sys/errno.h>
  39 #include <sys/device.h>
  40
  41 #include <uvm/uvm_extern.h>
  42
  43 #include <machine/autoconf.h>
  44 #include <machine/bus.h>
  45 #include <machine/intr.h>
  46
  47 #include <dev/isa/isavar.h>
  48 #include <dev/pci/pcireg.h>
  49 #include <dev/pci/pcivar.h>
  50
  51 #include <alpha/pci/apecsvar.h>
  52
  53 #include <alpha/pci/pci_2100_a50.h>
  54 #include <alpha/pci/siovar.h>
  55 #include <alpha/pci/sioreg.h>
  56
  57 #include "sio.h"
  58
  59 int     dec_2100_a50_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
  60 const char *dec_2100_a50_intr_string(void *, pci_intr_handle_t);
  61 const struct evcnt *dec_2100_a50_intr_evcnt(void *, pci_intr_handle_t);
  62 void    *dec_2100_a50_intr_establish(void *, pci_intr_handle_t,
  63             int, int (*func)(void *), void *);
  64 void    dec_2100_a50_intr_disestablish(void *, void *);
  65
  66 #define APECS_SIO_DEVICE        7       /* XXX */
  67
  68 void
  69 pci_2100_a50_pickintr(struct apecs_config *acp)
  70 {
  71         bus_space_tag_t iot = &acp->ac_iot;
  72         pci_chipset_tag_t pc = &acp->ac_pc;
  73         pcireg_t sioclass;
  74         int sioII;
  75
  76         /* XXX MAGIC NUMBER */
  77         sioclass = pci_conf_read(pc, pci_make_tag(pc, 0, 7, 0), PCI_CLASS_REG);
  78         sioII = (sioclass & 0xff) >= 3;
  79
  80         if (!sioII)
  81                 printf("WARNING: SIO NOT SIO II... NO BETS...\n");
  82
  83         pc->pc_intr_v = acp;
  84         pc->pc_intr_map = dec_2100_a50_intr_map;
  85         pc->pc_intr_string = dec_2100_a50_intr_string;
  86         pc->pc_intr_evcnt = dec_2100_a50_intr_evcnt;
  87         pc->pc_intr_establish = dec_2100_a50_intr_establish;
  88         pc->pc_intr_disestablish = dec_2100_a50_intr_disestablish;
  89
  90         /* Not supported on 2100 A50. */
  91         pc->pc_pciide_compat_intr_establish = NULL;
  92
  93 #if NSIO
  94         sio_intr_setup(pc, iot);
  95 #else
  96         panic("pci_2100_a50_pickintr: no I/O interrupt handler (no sio)");
  97 #endif
  98 }
  99
 100 int
 101 dec_2100_a50_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
 102 {
 103         pcitag_t bustag = pa->pa_intrtag;
 104         int buspin = pa->pa_intrpin;
 105         pci_chipset_tag_t pc = pa->pa_pc;
 106         int device, pirq;
 107         pcireg_t pirqreg;
 108         u_int8_t pirqline;
 109
 110 #ifndef DIAGNOSTIC
 111         pirq = 0;                               /* XXX gcc -Wuninitialized */
 112 #endif
 113
 114         if (buspin == 0) {
 115                 /* No IRQ used. */
 116                 return 1;
 117         }
 118         if (buspin > 4) {
 119                 printf("dec_2100_a50_intr_map: bad interrupt pin %d\n",
 120                     buspin);
 121                 return 1;
 122         }
 123
 124         pci_decompose_tag(pc, bustag, NULL, &device, NULL);
 125
 126         switch (device) {
 127         case 6:                                 /* NCR SCSI */
 128                 pirq = 3;
 129                 break;
 130
 131         case 11:                                /* slot 1 */
 132         case 14:                                /* slot 3 */
 133                 switch (buspin) {
 134                 case PCI_INTERRUPT_PIN_A:
 135                 case PCI_INTERRUPT_PIN_D:
 136                         pirq = 0;
 137                         break;
 138                 case PCI_INTERRUPT_PIN_B:
 139                         pirq = 2;
 140                         break;
 141                 case PCI_INTERRUPT_PIN_C:
 142                         pirq = 1;
 143                         break;
 144 #ifdef DIAGNOSTIC
 145                 default:                        /* XXX gcc -Wuninitialized */
 146                         panic("dec_2100_a50_intr_map bogus PCI pin %d",
 147                             buspin);
 148 #endif
 149                 };
 150                 break;
 151
 152         case 12:                                /* slot 2 */
 153                 switch (buspin) {
 154                 case PCI_INTERRUPT_PIN_A:
 155                 case PCI_INTERRUPT_PIN_D:
 156                         pirq = 1;
 157                         break;
 158                 case PCI_INTERRUPT_PIN_B:
 159                         pirq = 0;
 160                         break;
 161                 case PCI_INTERRUPT_PIN_C:
 162                         pirq = 2;
 163                         break;
 164 #ifdef DIAGNOSTIC
 165                 default:                        /* XXX gcc -Wuninitialized */
 166                         panic("dec_2100_a50_intr_map bogus PCI pin %d",
 167                             buspin);
 168 #endif
 169                 };
 170                 break;
 171
 172         case 13:                                /* slot 3 */
 173                 switch (buspin) {
 174                 case PCI_INTERRUPT_PIN_A:
 175                 case PCI_INTERRUPT_PIN_D:
 176                         pirq = 2;
 177                         break;
 178                 case PCI_INTERRUPT_PIN_B:
 179                         pirq = 1;
 180                         break;
 181                 case PCI_INTERRUPT_PIN_C:
 182                         pirq = 0;
 183                         break;
 184 #ifdef DIAGNOSTIC
 185                 default:                        /* XXX gcc -Wuninitialized */
 186                         panic("dec_2100_a50_intr_map bogus PCI pin %d",
 187                             buspin);
 188 #endif
 189                 };
 190                 break;
 191
 192         default:
 193                 printf("dec_2100_a50_intr_map: weird device number %d\n",
 194                     device);
 195                 return 1;
 196         }
 197
 198         pirqreg = pci_conf_read(pc, pci_make_tag(pc, 0, APECS_SIO_DEVICE, 0),
 199             SIO_PCIREG_PIRQ_RTCTRL);
 200 #if 0
 201         printf("pci_2100_a50_intr_map: device %d pin %c: pirq %d, reg = %x\n",
 202                 device, '@' + buspin, pirq, pirqreg);
 203 #endif
 204         pirqline = (pirqreg >> (pirq * 8)) & 0xff;
 205         if ((pirqline & 0x80) != 0)
 206                 return 1;
 207         pirqline &= 0xf;
 208
 209 #if 0
 210         printf("pci_2100_a50_intr_map: device %d pin %c: mapped to line %d\n",
 211             device, '@' + buspin, pirqline);
 212 #endif
 213
 214         *ihp = pirqline;
 215         return (0);
 216 }
 217
 218 const char *
 219 dec_2100_a50_intr_string(void *acv, pci_intr_handle_t ih)
 220 {
 221 #if 0
 222         struct apecs_config *acp = acv;
 223 #endif
 224
 225         return sio_intr_string(NULL /*XXX*/, ih);
 226 }
 227
 228 const struct evcnt *
 229 dec_2100_a50_intr_evcnt(void *acv, pci_intr_handle_t ih)
 230 {
 231 #if 0
 232         struct apecs_config *acp = acv;
 233 #endif
 234
 235         return sio_intr_evcnt(NULL /*XXX*/, ih);
 236 }
 237
 238 void *
 239 dec_2100_a50_intr_establish(void *acv, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg)
 240 {
 241 #if 0
 242         struct apecs_config *acp = acv;
 243 #endif
 244
 245         return sio_intr_establish(NULL /*XXX*/, ih, IST_LEVEL, level, func,
 246             arg);
 247 }
 248
 249 void
 250 dec_2100_a50_intr_disestablish(void *acv, void *cookie)
 251 {
 252 #if 0
 253         struct apecs_config *acp = acv;
 254 #endif
 255
 256         sio_intr_disestablish(NULL /*XXX*/, cookie);
 257 }