pci_kn300.c revision 1.7
1 /* $NetBSD: pci_kn300.c,v 1.7 1998/05/05 22:01:31 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 1.7 1998/05/05 22:01:31 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 #define NVEC (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) 79 static char savunit[NVEC]; 80 static char savirqs[NVEC]; 81 extern struct mcpcia_softc *mcpcias; 82 83 struct mcpcia_config *mcpcia_eisaccp = NULL; 84 85 static struct alpha_shared_intr *kn300_pci_intr; 86 87 #ifdef EVCNT_COUNTERS 88 struct evcnt kn300_intr_evcnt; 89 #endif 90 91 static char * kn300_spurious __P((int)); 92 void kn300_iointr __P((void *, unsigned long)); 93 void kn300_enable_intr __P((struct mcpcia_config *, int)); 94 void kn300_disable_intr __P((struct mcpcia_config *, int)); 95 96 void 97 pci_kn300_pickintr(ccp, first) 98 struct mcpcia_config *ccp; 99 int first; 100 { 101 pci_chipset_tag_t pc = &ccp->cc_pc; 102 103 if (first) { 104 int g; 105 106 kn300_pci_intr = alpha_shared_intr_alloc(NVEC); 107 for (g = 0; g < NVEC; g++) { 108 alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25); 109 savunit[g] = (char) -1; 110 savirqs[g] = (char) -1; 111 } 112 set_iointr(kn300_iointr); 113 } 114 115 pc->pc_intr_v = ccp; 116 pc->pc_intr_map = dec_kn300_intr_map; 117 pc->pc_intr_string = dec_kn300_intr_string; 118 pc->pc_intr_establish = dec_kn300_intr_establish; 119 pc->pc_intr_disestablish = dec_kn300_intr_disestablish; 120 121 /* Not supported on KN300. */ 122 pc->pc_pciide_compat_intr_establish = NULL; 123 124 #if NSIO 125 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { 126 extern void dec_kn300_cons_init __P((void)); 127 bus_space_tag_t iot = &ccp->cc_iot; 128 if (mcpcia_eisaccp) { 129 printf("Huh? There's only supposed to be one eisa!\n"); 130 } 131 sio_intr_setup(pc, iot); 132 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 133 mcpcia_eisaccp = ccp; 134 dec_kn300_cons_init(); /* XXXXXXXXXXXXXXXXXXX */ 135 } 136 #else 137 #error "It will be impossible for you to have a console" 138 #endif 139 } 140 141 int 142 dec_kn300_intr_map(ccv, bustag, buspin, line, ihp) 143 void *ccv; 144 pcitag_t bustag; 145 int buspin, line; 146 pci_intr_handle_t *ihp; 147 { 148 struct mcpcia_config *ccp = ccv; 149 pci_chipset_tag_t pc = &ccp->cc_pc; 150 int device; 151 int kn300_irq; 152 153 if (buspin == 0) { 154 /* No IRQ used. */ 155 return 1; 156 } 157 if (buspin > 4 || buspin < 0) { 158 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 159 return 1; 160 } 161 162 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 163 164 if (device == 1) { 165 /* 166 * This can only be the NCR810 SCSI. 167 * XXX: Do we need to check this more closely? 168 */ 169 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { 170 printf("XXXXX: How can you have an EISA in the spot " 171 "as an NCR 810?\n"); 172 } 173 kn300_irq = 16; 174 } else if (device >= 2 && device <= 5) { 175 kn300_irq = (device - 2) * 4; 176 } else { 177 printf("dec_kn300_intr_map: weird device number %d\n", device); 178 return(1); 179 } 180 /* 181 * handle layout: 182 * 183 * bits 0..1 buspin-1 184 * bits 2..4 PCI Slot (0..7- yes, some don't exist) 185 * bits 5..7 MID-4 186 * bits 8..10 7-GID 187 * bits 11-15 IRQ 188 */ 189 *ihp = (pci_intr_handle_t) 190 (buspin - 1 ) | 191 ((device & 0x7) << 2) | 192 ((ccp->cc_sc->mcpcia_mid - 4) << 5) | 193 ((7 - ccp->cc_sc->mcpcia_gid) << 8) | 194 (kn300_irq << 11); 195 return (0); 196 } 197 198 const char * 199 dec_kn300_intr_string(ccv, ih) 200 void *ccv; 201 pci_intr_handle_t ih; 202 { 203 static char irqstr[64]; 204 sprintf(irqstr, "kn300 irq %d PCI Interrupt Pin %c", 205 (ih >> 11) & 0x1f, (ih & 0x3) + 'A'); 206 return (irqstr); 207 } 208 209 void * 210 dec_kn300_intr_establish(ccv, ih, level, func, arg) 211 void *ccv; 212 pci_intr_handle_t ih; 213 int level; 214 int (*func) __P((void *)); 215 void *arg; 216 { 217 void *cookie; 218 int v; 219 220 v = ih & 0x3ff; 221 cookie = alpha_shared_intr_establish(kn300_pci_intr, v, IST_LEVEL, 222 level, func, arg, "kn300 vector"); 223 224 if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, v)) { 225 struct mcpcia_config *ccp = ccv; 226 savunit[v] = ccp->cc_sc->mcpcia_dev.dv_unit; 227 savirqs[v] = (ih >> 11) & 0x1f; 228 kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f)); 229 alpha_mb(); 230 } 231 return (cookie); 232 } 233 234 void 235 dec_kn300_intr_disestablish(ccv, cookie) 236 void *ccv, *cookie; 237 { 238 panic("dec_kn300_intr_disestablish not implemented"); 239 } 240 241 static char * 242 kn300_spurious(ih) 243 int ih; 244 { 245 static char str[48]; 246 int pidx, slot, midx, gidx; 247 248 pidx = ih & 0x3; 249 slot = (ih >> 2) & 0x7; 250 midx = (ih >> 5) & 0x7; 251 gidx = (ih >> 8) & 0x7; 252 sprintf(str, "mcbus%d mid %d PCI Slot %d PCI Interrupt Pin %c irq", 253 gidx, midx + 4, slot, pidx + 'A'); 254 return (str); 255 } 256 257 void 258 kn300_iointr(framep, vec) 259 void *framep; 260 unsigned long vec; 261 { 262 struct mcpcia_softc *mcp; 263 int v, gidx, midx; 264 265 if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) { 266 #if NSIO 267 sio_iointr(framep, vec); 268 return; 269 #else 270 printf("kn300_iointr: (E)ISA interrupt support not configured" 271 " for vector 0x%x", vec); 272 kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ); 273 #endif 274 } 275 276 v = (int) vec - MCPCIA_VEC_PCI; 277 278 279 midx = v / 0x200; 280 gidx = midx / 4; 281 midx = midx % 4; 282 283 284 #ifdef EVCNT_COUNTERS 285 kn300_intr_evcnt.ev_count++; 286 #endif 287 /* 288 * Check for i2c bus interrupts XXXXXXXXX 289 */ 290 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_CVEC) { 291 #ifndef EVCNT_COUNTERS 292 intrcnt[INTRCNT_KN300_I2C_CTRL]++; 293 #endif 294 printf("i2c: controller interrupt\n"); 295 return; 296 } 297 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_BVEC) { 298 #ifndef EVCNT_COUNTERS 299 intrcnt[INTRCNT_KN300_I2C_BUS]++; 300 #endif 301 printf("i2c: bus interrupt\n"); 302 return; 303 } 304 305 306 /* 307 * Convert vector offset into a dense number. 308 */ 309 310 v /= 0x10; 311 #ifndef EVCNT_COUNTERS 312 if (savirqs[v] >= 0 && savirqs[v] <= INTRCNT_KN300_NCR810) { 313 intrcnt[INTRCNT_KN300_IRQ + savirqs[v]]++; 314 } 315 #endif 316 317 if (alpha_shared_intr_dispatch(kn300_pci_intr, v)) { 318 return; 319 } 320 /* 321 * Nobody fielded the interrupt? 322 */ 323 alpha_shared_intr_stray(kn300_pci_intr, savirqs[v], kn300_spurious(v)); 324 if (kn300_pci_intr[v].intr_nstrays < 325 kn300_pci_intr[v].intr_maxstrays) { 326 return; 327 } 328 /* 329 * Search for the controlling mcpcia. 330 */ 331 for (mcp = mcpcias; mcp != NULL; mcp = mcp->mcpcia_next) { 332 if (mcp->mcpcia_dev.dv_unit == savunit[v]) { 333 break; 334 } 335 } 336 /* 337 * And if found, disable this IRQ level. Guess what? 338 * This may kill other things too. 339 */ 340 if (mcp) { 341 kn300_disable_intr(&mcp->mcpcia_cc, savirqs[v]); 342 } 343 } 344 345 void 346 kn300_enable_intr(ccp, irq) 347 struct mcpcia_config *ccp; 348 int irq; 349 { 350 alpha_mb(); 351 REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) |= (1 << irq); 352 alpha_mb(); 353 } 354 355 void 356 kn300_disable_intr(ccp, irq) 357 struct mcpcia_config *ccp; 358 int irq; 359 { 360 alpha_mb(); 361 REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) &= ~(1 << irq); 362 alpha_mb(); 363 } 364
Indexes created Sun Oct 12 22:09:51 GMT 2025