pci_kn300.c revision 1.5
1 /* $NetBSD: pci_kn300.c,v 1.5 1998/04/25 00:12:45 thorpej 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 1.5 1998/04/25 00:12:45 thorpej 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 /* Not supported on KN300. */ 134 pc->pc_pciide_compat_intr_establish = NULL; 135 136 #if NSIO 137 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { 138 extern void dec_kn300_cons_init __P((void)); 139 bus_space_tag_t iot = &ccp->cc_iot; 140 if (mcpcia_eisaccp) { 141 printf("Huh? There's only supposed to be one eisa!\n"); 142 } 143 sio_intr_setup(pc, iot); 144 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 145 mcpcia_eisaccp = ccp; 146 dec_kn300_cons_init(); /* XXXXXXXXXXXXXXXXXXX */ 147 } 148 #endif 149 } 150 151 int 152 dec_kn300_intr_map(ccv, bustag, buspin, line, ihp) 153 void *ccv; 154 pcitag_t bustag; 155 int buspin, line; 156 pci_intr_handle_t *ihp; 157 { 158 struct mcpcia_config *ccp = ccv; 159 pci_chipset_tag_t pc = &ccp->cc_pc; 160 int device; 161 int kn300_irq; 162 163 if (buspin == 0) { 164 /* No IRQ used. */ 165 return 1; 166 } 167 if (buspin > 4 || buspin < 0) { 168 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 169 return 1; 170 } 171 172 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 173 174 if (device == 1) { 175 /* 176 * This can only be the NCR810 SCSI. 177 * XXX: Do we need to check this more closely? 178 */ 179 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { 180 printf("XXXXX: How can you have an EISA in the spot " 181 "as an NCR 810?\n"); 182 } 183 kn300_irq = 16; 184 } else if (device >= 2 && device <= 5) { 185 kn300_irq = (device - 2) * 4; 186 } else { 187 printf("dec_kn300_intr_map: weird device number %d\n", device); 188 return(1); 189 } 190 /* 191 * handle layout: 192 * 193 * bits 0..2 7-GID 194 * bits 3..5 MID-4 195 * bits 6..8 PCI Slot (0..7- yes, some don't exist) 196 * bits 9..10 buspin-1 197 * bits 11-15 IRQ 198 */ 199 *ihp = (pci_intr_handle_t) 200 (7 - ccp->cc_sc->mcpcia_gid) | 201 ((ccp->cc_sc->mcpcia_mid - 4) << 3) | 202 (device << 6) | 203 ((buspin-1) << 9) | 204 (kn300_irq << 11); 205 return (0); 206 } 207 208 const char * 209 dec_kn300_intr_string(ccv, ih) 210 void *ccv; 211 pci_intr_handle_t ih; 212 { 213 static char irqstr[64]; 214 sprintf(irqstr, "kn300 irq %d PCI Interrupt Pin %c", 215 (ih >> 11) & 0x1f, ((ih >> 9) & 0x3) + 'A'); 216 return (irqstr); 217 } 218 219 void * 220 dec_kn300_intr_establish(ccv, ih, level, func, arg) 221 void *ccv; 222 pci_intr_handle_t ih; 223 int level; 224 int (*func) __P((void *)); 225 void *arg; 226 { 227 struct vectab *vp; 228 int gidx, midx, slot, pidx, s; 229 void *cookie = NULL; 230 231 gidx = ih & 0x7; 232 midx = (ih >> 3) & 0x7; 233 slot = (ih >> 6) & 0x7; 234 pidx = (ih >> 9) & 0x3; 235 236 /* 237 * XXX: FIXME - for PCI bridges, the framework here is such that 238 * XXX: we're mapping the mapping for the bridge, not the 239 * XXX: device behind the bridge, so we're not cognizant of the 240 * XXX: pin swizzling that could go on. We really ought to fix 241 * XXX: this, but for a first cut, assuming all pins map to the 242 * XXX: same device and filling in all pin vectors is probably 243 * XXX: okay. 244 */ 245 246 for (pidx = 0; pidx < 4; pidx++) { 247 vp = &vectab[gidx][midx][slot][pidx]; 248 if (vp->func != kn300_spurious) { 249 printf("dec_kn300_intr_establish: vector cookie 0x%x " 250 "already used\n", ih); 251 return (cookie); 252 } 253 s = splhigh(); 254 vp->func = func; 255 vp->arg = arg; 256 vp->irq = (ih >> 11) & 0x1f; 257 (void) splx(s); 258 } 259 260 kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f)); 261 cookie = (void *) ih; 262 return (cookie); 263 } 264 265 void 266 dec_kn300_intr_disestablish(ccv, cookie) 267 void *ccv, *cookie; 268 { 269 pci_intr_handle_t ih = (pci_intr_handle_t) cookie; 270 int gidx, midx, slot, pidx, s; 271 struct vectab *vp; 272 273 gidx = ih & 0x7; 274 midx = (ih >> 3) & 0x7; 275 slot = (ih >> 6) & 0x7; 276 pidx = (ih >> 9) & 0x3; 277 vp = &vectab[gidx][midx][slot][pidx]; 278 s = splhigh(); 279 vp->func = kn300_spurious; 280 vp->arg = cookie; 281 vp->irq = -1; 282 (void) splx(s); 283 kn300_disable_intr(ccv, (int)((ih >> 11) & 0x1f)); 284 } 285 286 int 287 kn300_spurious(arg) 288 void *arg; 289 { 290 pci_intr_handle_t ih = (pci_intr_handle_t) arg; 291 int gidx, midx, slot, pidx; 292 293 gidx = ih & 0x7; 294 midx = (ih >> 3) & 0x7; 295 slot = (ih >> 6) & 0x7; 296 pidx = (ih >> 9) & 0x3; 297 printf("Spurious Interrupt from mcbus%d MID %d Slot %d " 298 "PCI Interrupt Pin %c\n", gidx, midx + 4, slot, pidx + 'A'); 299 /* 300 * XXX: We *could*, if we have recorded all the mcpcia softcs 301 * XXX: that we've configured, and this spurious interrupt 302 * XXX: falls within this range, disable this interrupt. 303 * 304 * XXX: Later. 305 */ 306 return (-1); 307 } 308 309 void 310 kn300_iointr(framep, vec) 311 void *framep; 312 unsigned long vec; 313 { 314 int base, gidx, midx, slot, pidx; 315 struct vectab *vp; 316 317 if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) { 318 #if NSIO 319 sio_iointr(framep, vec); 320 return; 321 #else 322 printf("kn300_iointr: (E)ISA interrupt support not configured" 323 " for vector 0x%x", vec); 324 kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ); 325 #endif 326 } 327 328 base = (int) vec - MCPCIA_VEC_PCI; 329 330 midx = base / 0x200; 331 gidx = midx / 4; 332 midx = midx % 4; 333 slot = (base % 0x200) / 0x10; 334 pidx = ((slot / 4) & 0x3); 335 slot = slot / 4; 336 337 if (gidx >= MAX_MC_BUS || midx >= MCPCIA_PER_MCBUS || 338 slot >= MCPCIA_MAXSLOT || pidx >= NPIN) { 339 panic("kn300_iointr: vec 0x%x (mcbus%d mid%d slot %d pin%d)", 340 vec, gidx, midx+4, slot, pidx); 341 } 342 343 #ifdef EVCNT_COUNTERS 344 kn300_intr_evcnt.ev_count++; 345 #endif 346 /* 347 * Check for i2c bus interrupts XXXXXXXXX 348 */ 349 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_CVEC) { 350 #ifndef EVCNT_COUNTERS 351 intrcnt[INTRCNT_KN300_I2C_CTRL]++; 352 #endif 353 printf("i2c: controller interrupt\n"); 354 return; 355 } 356 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_BVEC) { 357 #ifndef EVCNT_COUNTERS 358 intrcnt[INTRCNT_KN300_I2C_BUS]++; 359 #endif 360 printf("i2c: bus interrupt\n"); 361 return; 362 } 363 364 /* 365 * Now, for the main stuff... 366 */ 367 vp = &vectab[gidx][midx][slot][pidx]; 368 #ifndef EVCNT_COUNTERS 369 if (vp->irq >= 0 && vp->irq <= INTRCNT_KN300_NCR810) { 370 intrcnt[INTRCNT_KN300_IRQ + vp->irq]++; 371 } 372 #endif 373 if ((*vp->func)(vp->arg) == 0) { 374 #if 0 375 printf("Unclaimed interrupt from mcbus%d MID %d Slot %d " 376 "PCI Interrupt Pin %c\n", gidx, midx + 4, slot, pidx + 'A'); 377 #endif 378 } 379 } 380 381 void 382 kn300_enable_intr(ccp, irq) 383 struct mcpcia_config *ccp; 384 int irq; 385 { 386 alpha_mb(); 387 REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) |= (1 << irq); 388 alpha_mb(); 389 } 390 391 void 392 kn300_disable_intr(ccp, irq) 393 struct mcpcia_config *ccp; 394 int irq; 395 { 396 alpha_mb(); 397 REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) &= ~(1 << irq); 398 alpha_mb(); 399 } 400
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