pci_kn300.c revision 1.2
1 /* $NetBSD: pci_kn300.c,v 1.2 1998/04/15 01:18:17 mjacob Exp $ */ 2 3 /* 4 * Copyright (c) 1998 by Matthew Jacob 5 * NASA AMES Research Center. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice immediately at the beginning of the file, without modification, 13 * this list of conditions, and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author 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 THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 24 * ANY 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 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 35 __KERNEL_RCSID(0, "$NetBSD: pci_kn300.c,v 1.2 1998/04/15 01:18:17 mjacob Exp $"); 36 37 #include <sys/types.h> 38 #include <sys/param.h> 39 #include <sys/time.h> 40 #include <sys/systm.h> 41 #include <sys/errno.h> 42 #include <sys/malloc.h> 43 #include <sys/device.h> 44 #include <sys/syslog.h> 45 46 #include <vm/vm.h> 47 48 #include <machine/autoconf.h> 49 50 #include <dev/pci/pcireg.h> 51 #include <dev/pci/pcivar.h> 52 53 #include <alpha/mcbus/mcbusvar.h> 54 #include <alpha/mcbus/mcbusreg.h> 55 #include <alpha/pci/mcpciareg.h> 56 #include <alpha/pci/mcpciavar.h> 57 #include <alpha/pci/pci_kn300.h> 58 59 #ifndef EVCNT_COUNTERS 60 #include <machine/intrcnt.h> 61 #endif 62 63 #include "sio.h" 64 #if NSIO 65 #include <alpha/pci/siovar.h> 66 #endif 67 68 int 69 dec_kn300_intr_map __P((void *, pcitag_t, int, int, pci_intr_handle_t *)); 70 const char *dec_kn300_intr_string __P((void *, pci_intr_handle_t)); 71 void * dec_kn300_intr_establish __P((void *, pci_intr_handle_t, 72 int, int (*func)(void *), void *)); 73 void dec_kn300_intr_disestablish __P((void *, void *)); 74 75 #define KN300_PCEB_IRQ 16 76 #define NPIN 4 77 78 static struct vectab { 79 int (*func) __P((void *)); 80 void *arg; 81 int irq; 82 } vectab[MAX_MC_BUS][MCPCIA_PER_MCBUS][MCPCIA_MAXSLOT][NPIN]; 83 84 struct mcpcia_config *mcpcia_eisaccp = NULL; 85 86 #ifdef EVCNT_COUNTERS 87 struct evcnt kn300_intr_evcnt; 88 #endif 89 90 int kn300_spurious __P((void *)); 91 void kn300_iointr __P((void *, unsigned long)); 92 void kn300_enable_intr __P((struct mcpcia_config *, int)); 93 void kn300_disable_intr __P((struct mcpcia_config *, int)); 94 95 void 96 pci_kn300_pickintr(ccp, first) 97 struct mcpcia_config *ccp; 98 int first; 99 { 100 pci_chipset_tag_t pc = &ccp->cc_pc; 101 102 if (first) { 103 int g; 104 for (g = 0; g < MAX_MC_BUS; g++) { 105 int m; 106 for (m = 0; m < MCPCIA_PER_MCBUS; m++) { 107 int s; 108 for (s = 0; s < MCPCIA_MAXSLOT; s++) { 109 int p; 110 for (p = 0; p < NPIN; p++) { 111 struct vectab *vp; 112 vp = &vectab[g][m][s][p]; 113 vp->func = kn300_spurious; 114 vp->arg = (void *) ((long) 115 (g << 0) | 116 (m << 3) | 117 (s << 6) | 118 (p << 9)); 119 vp->irq = -1; 120 } 121 } 122 } 123 } 124 set_iointr(kn300_iointr); 125 } 126 127 pc->pc_intr_v = ccp; 128 pc->pc_intr_map = dec_kn300_intr_map; 129 pc->pc_intr_string = dec_kn300_intr_string; 130 pc->pc_intr_establish = dec_kn300_intr_establish; 131 pc->pc_intr_disestablish = dec_kn300_intr_disestablish; 132 133 #if NSIO 134 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { 135 extern void dec_kn300_cons_init __P((void)); 136 bus_space_tag_t iot = &ccp->cc_iot; 137 if (mcpcia_eisaccp) { 138 printf("Huh? There's only supposed to be one eisa!\n"); 139 } 140 sio_intr_setup(pc, iot); 141 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 142 mcpcia_eisaccp = ccp; 143 dec_kn300_cons_init(); /* XXXXXXXXXXXXXXXXXXX */ 144 } 145 #endif 146 } 147 148 int 149 dec_kn300_intr_map(ccv, bustag, buspin, line, ihp) 150 void *ccv; 151 pcitag_t bustag; 152 int buspin, line; 153 pci_intr_handle_t *ihp; 154 { 155 struct mcpcia_config *ccp = ccv; 156 pci_chipset_tag_t pc = &ccp->cc_pc; 157 int device; 158 int kn300_irq; 159 160 if (buspin == 0) { 161 /* No IRQ used. */ 162 return 1; 163 } 164 if (buspin > 4 || buspin < 0) { 165 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 166 return 1; 167 } 168 169 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 170 171 if (device == 1) { 172 /* 173 * This can only be the NCR810 SCSI. 174 * XXX: Do we need to check this more closely? 175 */ 176 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { 177 printf("XXXXX: How can you have an EISA in the spot " 178 "as an NCR 810?\n"); 179 } 180 kn300_irq = 16; 181 } else if (device >= 2 && device <= 5) { 182 kn300_irq = (device - 2) * 4; 183 } else { 184 printf("dec_kn300_intr_map: weird device number %d\n", device); 185 return(1); 186 } 187 /* 188 * handle layout: 189 * 190 * bits 0..2 7-GID 191 * bits 3..5 MID-4 192 * bits 6..8 PCI Slot (0..7- yes, some don't exist) 193 * bits 9..10 buspin-1 194 * bits 11-15 IRQ 195 */ 196 *ihp = (pci_intr_handle_t) 197 (7 - ccp->cc_sc->mcpcia_gid) | 198 ((ccp->cc_sc->mcpcia_mid - 4) << 3) | 199 (device << 6) | 200 ((buspin-1) << 9) | 201 (kn300_irq << 11); 202 return (0); 203 } 204 205 const char * 206 dec_kn300_intr_string(ccv, ih) 207 void *ccv; 208 pci_intr_handle_t ih; 209 { 210 static char irqstr[64]; 211 sprintf(irqstr, "kn300 irq %d PCI Interrupt Pin %c", 212 (ih >> 11) & 0x1f, ((ih >> 9) & 0x3) + 'A'); 213 return (irqstr); 214 } 215 216 void * 217 dec_kn300_intr_establish(ccv, ih, level, func, arg) 218 void *ccv; 219 pci_intr_handle_t ih; 220 int level; 221 int (*func) __P((void *)); 222 void *arg; 223 { 224 struct vectab *vp; 225 int gidx, midx, slot, pidx, s; 226 void *cookie = NULL; 227 228 gidx = ih & 0x7; 229 midx = (ih >> 3) & 0x7; 230 slot = (ih >> 6) & 0x7; 231 pidx = (ih >> 9) & 0x3; 232 233 /* 234 * XXX: FIXME - for PCI bridges, the framework here is such that 235 * XXX: we're mapping the mapping for the bridge, not the 236 * XXX: device behind the bridge, so we're not cognizant of the 237 * XXX: pin swizzling that could go on. We really ought to fix 238 * XXX: this, but for a first cut, assuming all pins map to the 239 * XXX: same device and filling in all pin vectors is probably 240 * XXX: okay. 241 */ 242 243 for (pidx = 0; pidx < 4; pidx++) { 244 vp = &vectab[gidx][midx][slot][pidx]; 245 if (vp->func != kn300_spurious) { 246 printf("dec_kn300_intr_establish: vector cookie 0x%x " 247 "already used\n", ih); 248 return (cookie); 249 } 250 s = splhigh(); 251 vp->func = func; 252 vp->arg = arg; 253 vp->irq = (ih >> 11) & 0x1f; 254 (void) splx(s); 255 } 256 257 kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f)); 258 cookie = (void *) ih; 259 return (cookie); 260 } 261 262 void 263 dec_kn300_intr_disestablish(ccv, cookie) 264 void *ccv, *cookie; 265 { 266 pci_intr_handle_t ih = (pci_intr_handle_t) cookie; 267 int gidx, midx, slot, pidx, s; 268 struct vectab *vp; 269 270 gidx = ih & 0x7; 271 midx = (ih >> 3) & 0x7; 272 slot = (ih >> 6) & 0x7; 273 pidx = (ih >> 9) & 0x3; 274 vp = &vectab[gidx][midx][slot][pidx]; 275 s = splhigh(); 276 vp->func = kn300_spurious; 277 vp->arg = cookie; 278 vp->irq = -1; 279 (void) splx(s); 280 kn300_disable_intr(ccv, (int)((ih >> 11) & 0x1f)); 281 } 282 283 int 284 kn300_spurious(arg) 285 void *arg; 286 { 287 pci_intr_handle_t ih = (pci_intr_handle_t) arg; 288 int gidx, midx, slot, pidx; 289 290 gidx = ih & 0x7; 291 midx = (ih >> 3) & 0x7; 292 slot = (ih >> 6) & 0x7; 293 pidx = (ih >> 9) & 0x3; 294 printf("Spurious Interrupt from mcbus%d MID %d Slot %d " 295 "PCI Interrupt Pin %c\n", gidx, midx + 4, slot, pidx + 'A'); 296 /* 297 * XXX: We *could*, if we have recorded all the mcpcia softcs 298 * XXX: that we've configured, and this spurious interrupt 299 * XXX: falls within this range, disable this interrupt. 300 * 301 * XXX: Later. 302 */ 303 return (-1); 304 } 305 306 void 307 kn300_iointr(framep, vec) 308 void *framep; 309 unsigned long vec; 310 { 311 int base, gidx, midx, slot, pidx; 312 struct vectab *vp; 313 314 if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) { 315 #if NSIO 316 sio_iointr(framep, vec); 317 return; 318 #else 319 printf("kn300_iointr: (E)ISA interrupt support not configured" 320 " for vector 0x%x", vec); 321 kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ); 322 #endif 323 } 324 325 base = (int) vec - MCPCIA_VEC_PCI; 326 327 midx = base / 0x200; 328 gidx = midx / 4; 329 midx = midx % 4; 330 slot = (base % 0x200) / 0x10; 331 pidx = ((slot / 4) & 0x3); 332 slot = slot / 4; 333 334 if (gidx >= MAX_MC_BUS || midx >= MCPCIA_PER_MCBUS || 335 slot >= MCPCIA_MAXSLOT || pidx >= NPIN) { 336 panic("kn300_iointr: vec 0x%x (mcbus%d mid%d slot %d pin%d)", 337 vec, gidx, midx+4, slot, pidx); 338 } 339 340 #ifdef EVCNT_COUNTERS 341 kn300_intr_evcnt.ev_count++; 342 #endif 343 /* 344 * Check for i2c bus interrupts XXXXXXXXX 345 */ 346 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_CVEC) { 347 #ifndef EVCNT_COUNTERS 348 intrcnt[INTRCNT_KN300_I2C_CTRL]++; 349 #endif 350 printf("i2c: controller interrupt\n"); 351 return; 352 } 353 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_BVEC) { 354 #ifndef EVCNT_COUNTERS 355 intrcnt[INTRCNT_KN300_I2C_BUS]++; 356 #endif 357 printf("i2c: bus interrupt\n"); 358 return; 359 } 360 361 /* 362 * Now, for the main stuff... 363 */ 364 vp = &vectab[gidx][midx][slot][pidx]; 365 #ifndef EVCNT_COUNTERS 366 if (vp->irq >= 0 && vp->irq <= INTRCNT_KN300_NCR810) { 367 intrcnt[INTRCNT_KN300_IRQ + vp->irq]++; 368 } 369 #endif 370 if ((*vp->func)(vp->arg) == 0) { 371 #if 0 372 printf("Unclaimed interrupt from mcbus%d MID %d Slot %d " 373 "PCI Interrupt Pin %c\n", gidx, midx + 4, slot, pidx + 'A'); 374 #endif 375 } 376 } 377 378 void 379 kn300_enable_intr(ccp, irq) 380 struct mcpcia_config *ccp; 381 int irq; 382 { 383 alpha_mb(); 384 REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) |= (1 << irq); 385 alpha_mb(); 386 } 387 388 void 389 kn300_disable_intr(ccp, irq) 390 struct mcpcia_config *ccp; 391 int irq; 392 { 393 alpha_mb(); 394 REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) &= ~(1 << irq); 395 alpha_mb(); 396 } 397
Indexes created Mon Oct 13 04:09:54 GMT 2025