sys/arch/alpha/pci/pci_6600.c

   1 /* $NetBSD: pci_6600.c,v 1.18 2009/03/14 21:04:02 dsl Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1999 by Ross Harvey.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by Ross Harvey.
  17  * 4. The name of Ross Harvey may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
  21  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
  24  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  */
  33
  34 #include <sys/cdefs.h>
  35
  36 __KERNEL_RCSID(0, "$NetBSD: pci_6600.c,v 1.18 2009/03/14 21:04:02 dsl Exp $");
  37
  38 #include <sys/param.h>
  39 #include <sys/systm.h>
  40 #include <sys/kernel.h>
  41 #include <sys/device.h>
  42 #include <sys/malloc.h>
  43
  44 #include <uvm/uvm_extern.h>
  45
  46 #include <machine/autoconf.h>
  47 #define _ALPHA_BUS_DMA_PRIVATE
  48 #include <machine/bus.h>
  49 #include <machine/rpb.h>
  50 #include <machine/alpha.h>
  51
  52 #include <dev/pci/pcireg.h>
  53 #include <dev/pci/pcivar.h>
  54 #include <dev/pci/pciidereg.h>
  55 #include <dev/pci/pciidevar.h>
  56
  57 #include <alpha/pci/tsreg.h>
  58 #include <alpha/pci/tsvar.h>
  59 #include <alpha/pci/pci_6600.h>
  60
  61 #define pci_6600() { Generate ctags(1) key. }
  62
  63 #include "sio.h"
  64 #if NSIO
  65 #include <alpha/pci/siovar.h>
  66 #endif
  67
  68 #define PCI_NIRQ                64
  69 #define PCI_STRAY_MAX           5
  70
  71 /*
  72  * Some Tsunami models have a PCI device (the USB controller) with interrupts
  73  * tied to ISA IRQ lines.  The IRQ is encoded as:
  74  *
  75  *      line = 0xe0 | isa_irq;
  76  */
  77 #define DEC_6600_LINE_IS_ISA(line)      ((line) >= 0xe0 && (line) <= 0xef)
  78 #define DEC_6600_LINE_ISA_IRQ(line)     ((line) & 0x0f)
  79
  80 static const char *irqtype = "6600 irq";
  81 static struct tsp_config *sioprimary;
  82
  83 void dec_6600_intr_disestablish(void *, void *);
  84 void *dec_6600_intr_establish(
  85     void *, pci_intr_handle_t, int, int (*func)(void *), void *);
  86 const char *dec_6600_intr_string(void *, pci_intr_handle_t);
  87 const struct evcnt *dec_6600_intr_evcnt(void *, pci_intr_handle_t);
  88 int dec_6600_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
  89 void *dec_6600_pciide_compat_intr_establish(void *, struct device *,
  90     struct pci_attach_args *, int, int (*)(void *), void *);
  91
  92 struct alpha_shared_intr *dec_6600_pci_intr;
  93
  94 void dec_6600_iointr(void *arg, unsigned long vec);
  95 extern void dec_6600_intr_enable(int irq);
  96 extern void dec_6600_intr_disable(int irq);
  97
  98 void
  99 pci_6600_pickintr(struct tsp_config *pcp)
 100 {
 101         bus_space_tag_t iot = &pcp->pc_iot;
 102         pci_chipset_tag_t pc = &pcp->pc_pc;
 103         char *cp;
 104         int i;
 105
 106         pc->pc_intr_v = pcp;
 107         pc->pc_intr_map = dec_6600_intr_map;
 108         pc->pc_intr_string = dec_6600_intr_string;
 109         pc->pc_intr_evcnt = dec_6600_intr_evcnt;
 110         pc->pc_intr_establish = dec_6600_intr_establish;
 111         pc->pc_intr_disestablish = dec_6600_intr_disestablish;
 112         pc->pc_pciide_compat_intr_establish = NULL;
 113
 114         /*
 115          * System-wide and Pchip-0-only logic...
 116          */
 117         if (dec_6600_pci_intr == NULL) {
 118                 sioprimary = pcp;
 119                 pc->pc_pciide_compat_intr_establish =
 120                     dec_6600_pciide_compat_intr_establish;
 121                 dec_6600_pci_intr = alpha_shared_intr_alloc(PCI_NIRQ, 8);
 122                 for (i = 0; i < PCI_NIRQ; i++) {
 123                         alpha_shared_intr_set_maxstrays(dec_6600_pci_intr, i,
 124                             PCI_STRAY_MAX);
 125                         alpha_shared_intr_set_private(dec_6600_pci_intr, i,
 126                             sioprimary);
 127
 128                         cp = alpha_shared_intr_string(dec_6600_pci_intr, i);
 129                         sprintf(cp, "irq %d", i);
 130                         evcnt_attach_dynamic(alpha_shared_intr_evcnt(
 131                             dec_6600_pci_intr, i), EVCNT_TYPE_INTR, NULL,
 132                             "dec_6600", cp);
 133                 }
 134 #if NSIO
 135                 sio_intr_setup(pc, iot);
 136                 dec_6600_intr_enable(55);       /* irq line for sio */
 137 #endif
 138         }
 139 }
 140
 141 int
 142 dec_6600_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
 143 {
 144         pcitag_t bustag = pa->pa_intrtag;
 145         int buspin = pa->pa_intrpin, line = pa->pa_intrline;
 146         pci_chipset_tag_t pc = pa->pa_pc;
 147         int bus, device, function;
 148
 149         if (buspin == 0) {
 150                 /* No IRQ used. */
 151                 return 1;
 152         }
 153         if (buspin > 4) {
 154                 printf("intr_map: bad interrupt pin %d\n", buspin);
 155                 return 1;
 156         }
 157
 158         pci_decompose_tag(pc, bustag, &bus, &device, &function);
 159
 160         /*
 161          * The console places the interrupt mapping in the "line" value.
 162          * A value of (char)-1 indicates there is no mapping.
 163          */
 164         if (line == 0xff) {
 165                 printf("dec_6600_intr_map: no mapping for %d/%d/%d\n",
 166                     bus, device, function);
 167                 return (1);
 168         }
 169
 170 #if NSIO == 0
 171         if (DEC_6600_LINE_IS_ISA(line)) {
 172                 printf("dec_6600_intr_map: ISA IRQ %d for %d/%d/%d\n",
 173                     DEC_6600_LINE_ISA_IRQ(line), bus, device, function);
 174                 return (1);
 175         }
 176 #endif
 177
 178         if (DEC_6600_LINE_IS_ISA(line) == 0 && line >= PCI_NIRQ)
 179                 panic("dec_6600_intr_map: dec 6600 irq too large (%d)",
 180                     line);
 181
 182         *ihp = line;
 183         return (0);
 184 }
 185
 186 const char *
 187 dec_6600_intr_string(void *acv, pci_intr_handle_t ih)
 188 {
 189
 190         static const char irqfmt[] = "dec 6600 irq %ld";
 191         static char irqstr[sizeof irqfmt];
 192
 193 #if NSIO
 194         if (DEC_6600_LINE_IS_ISA(ih))
 195                 return (sio_intr_string(NULL /*XXX*/,
 196                     DEC_6600_LINE_ISA_IRQ(ih)));
 197 #endif
 198
 199         snprintf(irqstr, sizeof irqstr, irqfmt, ih);
 200         return (irqstr);
 201 }
 202
 203 const struct evcnt *
 204 dec_6600_intr_evcnt(void *acv, pci_intr_handle_t ih)
 205 {
 206
 207 #if NSIO
 208         if (DEC_6600_LINE_IS_ISA(ih))
 209                 return (sio_intr_evcnt(NULL /*XXX*/,
 210                     DEC_6600_LINE_ISA_IRQ(ih)));
 211 #endif
 212
 213         return (alpha_shared_intr_evcnt(dec_6600_pci_intr, ih));
 214 }
 215
 216 void *
 217 dec_6600_intr_establish(void *acv, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg)
 218 {
 219         void *cookie;
 220
 221 #if NSIO
 222         if (DEC_6600_LINE_IS_ISA(ih))
 223                 return (sio_intr_establish(NULL /*XXX*/,
 224                     DEC_6600_LINE_ISA_IRQ(ih), IST_LEVEL, level, func, arg));
 225 #endif
 226
 227         if (ih >= PCI_NIRQ)
 228                 panic("dec_6600_intr_establish: bogus dec 6600 IRQ 0x%lx",
 229                     ih);
 230
 231         cookie = alpha_shared_intr_establish(dec_6600_pci_intr, ih, IST_LEVEL,
 232             level, func, arg, irqtype);
 233
 234         if (cookie != NULL &&
 235             alpha_shared_intr_firstactive(dec_6600_pci_intr, ih)) {
 236                 scb_set(0x900 + SCB_IDXTOVEC(ih), dec_6600_iointr, NULL,
 237                     level);
 238                 dec_6600_intr_enable(ih);
 239         }
 240         return (cookie);
 241 }
 242
 243 void
 244 dec_6600_intr_disestablish(void *acv, void *cookie)
 245 {
 246         struct alpha_shared_intrhand *ih = cookie;
 247         unsigned int irq = ih->ih_num;
 248         int s;
 249
 250 #if NSIO
 251         /*
 252          * We have to determine if this is an ISA IRQ or not!  We do this
 253          * by checking to see if the intrhand points back to an intrhead
 254          * that points to the sioprimary TSP.  If not, it's an ISA IRQ.
 255          * Pretty disgusting, eh?
 256          */
 257         if (ih->ih_intrhead->intr_private != sioprimary) {
 258                 sio_intr_disestablish(NULL /*XXX*/, cookie);
 259                 return;
 260         }
 261 #endif
 262
 263         s = splhigh();
 264
 265         alpha_shared_intr_disestablish(dec_6600_pci_intr, cookie, irqtype);
 266         if (alpha_shared_intr_isactive(dec_6600_pci_intr, irq) == 0) {
 267                 dec_6600_intr_disable(irq);
 268                 alpha_shared_intr_set_dfltsharetype(dec_6600_pci_intr, irq,
 269                     IST_NONE);
 270                 scb_free(0x900 + SCB_IDXTOVEC(irq));
 271         }
 272
 273         splx(s);
 274 }
 275
 276 void
 277 dec_6600_iointr(void *arg, unsigned long vec)
 278 {
 279         int irq;
 280
 281         irq = SCB_VECTOIDX(vec - 0x900);
 282
 283         if (irq >= PCI_NIRQ)
 284                 panic("iointr: irq %d is too high", irq);
 285
 286         if (!alpha_shared_intr_dispatch(dec_6600_pci_intr, irq)) {
 287                 alpha_shared_intr_stray(dec_6600_pci_intr, irq,
 288                     irqtype);
 289                 if (ALPHA_SHARED_INTR_DISABLE(dec_6600_pci_intr, irq))
 290                         dec_6600_intr_disable(irq);
 291         } else
 292                 alpha_shared_intr_reset_strays(dec_6600_pci_intr, irq);
 293 }
 294
 295 void
 296 dec_6600_intr_enable(int irq)
 297 {
 298         alpha_mb();
 299         STQP(TS_C_DIM0) |= 1UL << irq;
 300         alpha_mb();
 301 }
 302
 303 void
 304 dec_6600_intr_disable(int irq)
 305 {
 306         alpha_mb();
 307         STQP(TS_C_DIM0) &= ~(1UL << irq);
 308         alpha_mb();
 309 }
 310
 311 void *
 312 dec_6600_pciide_compat_intr_establish(void *v, struct device *dev, struct pci_attach_args *pa, int chan, int (*func)(void *), void *arg)
 313 {
 314         pci_chipset_tag_t pc = pa->pa_pc;
 315         void *cookie = NULL;
 316         int bus, irq;
 317
 318         pci_decompose_tag(pc, pa->pa_tag, &bus, NULL, NULL);
 319
 320         /*
 321          * If this isn't PCI bus #0 on the TSP that holds the PCI-ISA
 322          * bridge, all bets are off.
 323          */
 324         if (bus != 0 || pc->pc_intr_v != sioprimary)
 325                 return (NULL);
 326
 327         irq = PCIIDE_COMPAT_IRQ(chan);
 328 #if NSIO
 329         cookie = sio_intr_establish(NULL /*XXX*/, irq, IST_EDGE, IPL_BIO,
 330             func, arg);
 331         if (cookie == NULL)
 332                 return (NULL);
 333         printf("%s: %s channel interrupting at %s\n", dev->dv_xname,
 334             PCIIDE_CHANNEL_NAME(chan), sio_intr_string(NULL /*XXX*/, irq));
 335 #endif
 336         return (cookie);
 337 }