pci_kn300.c revision 1.6
1 /* $NetBSD: pci_kn300.c,v 1.6 1998/04/30 04:31:19 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 1.6 1998/04/30 04:31:19 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 #endif 137 } 138 139 int 140 dec_kn300_intr_map(ccv, bustag, buspin, line, ihp) 141 void *ccv; 142 pcitag_t bustag; 143 int buspin, line; 144 pci_intr_handle_t *ihp; 145 { 146 struct mcpcia_config *ccp = ccv; 147 pci_chipset_tag_t pc = &ccp->cc_pc; 148 int device; 149 int kn300_irq; 150 151 if (buspin == 0) { 152 /* No IRQ used. */ 153 return 1; 154 } 155 if (buspin > 4 || buspin < 0) { 156 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 157 return 1; 158 } 159 160 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 161 162 if (device == 1) { 163 /* 164 * This can only be the NCR810 SCSI. 165 * XXX: Do we need to check this more closely? 166 */ 167 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp->cc_sc)))) { 168 printf("XXXXX: How can you have an EISA in the spot " 169 "as an NCR 810?\n"); 170 } 171 kn300_irq = 16; 172 } else if (device >= 2 && device <= 5) { 173 kn300_irq = (device - 2) * 4; 174 } else { 175 printf("dec_kn300_intr_map: weird device number %d\n", device); 176 return(1); 177 } 178 /* 179 * handle layout: 180 * 181 * bits 0..1 buspin-1 182 * bits 2..4 PCI Slot (0..7- yes, some don't exist) 183 * bits 5..7 MID-4 184 * bits 8..10 7-GID 185 * bits 11-15 IRQ 186 */ 187 *ihp = (pci_intr_handle_t) 188 (buspin - 1 ) | 189 ((device & 0x7) << 2) | 190 ((ccp->cc_sc->mcpcia_mid - 4) << 5) | 191 ((7 - ccp->cc_sc->mcpcia_gid) << 8) | 192 (kn300_irq << 11); 193 return (0); 194 } 195 196 const char * 197 dec_kn300_intr_string(ccv, ih) 198 void *ccv; 199 pci_intr_handle_t ih; 200 { 201 static char irqstr[64]; 202 sprintf(irqstr, "kn300 irq %d PCI Interrupt Pin %c", 203 (ih >> 11) & 0x1f, (ih & 0x3) + 'A'); 204 return (irqstr); 205 } 206 207 void * 208 dec_kn300_intr_establish(ccv, ih, level, func, arg) 209 void *ccv; 210 pci_intr_handle_t ih; 211 int level; 212 int (*func) __P((void *)); 213 void *arg; 214 { 215 void *cookie; 216 int v; 217 218 v = ih & 0x3ff; 219 cookie = alpha_shared_intr_establish(kn300_pci_intr, v, IST_LEVEL, 220 level, func, arg, "kn300 vector"); 221 222 if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, v)) { 223 struct mcpcia_config *ccp = ccv; 224 savunit[v] = ccp->cc_sc->mcpcia_dev.dv_unit; 225 savirqs[v] = (ih >> 11) & 0x1f; 226 kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f)); 227 alpha_mb(); 228 } 229 return (cookie); 230 } 231 232 void 233 dec_kn300_intr_disestablish(ccv, cookie) 234 void *ccv, *cookie; 235 { 236 panic("dec_kn300_intr_disestablish not implemented"); 237 } 238 239 static char * 240 kn300_spurious(ih) 241 int ih; 242 { 243 static char str[48]; 244 int pidx, slot, midx, gidx; 245 246 pidx = ih & 0x3; 247 slot = (ih >> 2) & 0x7; 248 midx = (ih >> 5) & 0x7; 249 gidx = (ih >> 8) & 0x7; 250 sprintf(str, "mcbus%d mid %d PCI Slot %d PCI Interrupt Pin %c irq", 251 gidx, midx + 4, slot, pidx + 'A'); 252 return (str); 253 } 254 255 void 256 kn300_iointr(framep, vec) 257 void *framep; 258 unsigned long vec; 259 { 260 struct mcpcia_softc *mcp; 261 int v, gidx, midx; 262 263 if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) { 264 #if NSIO 265 sio_iointr(framep, vec); 266 return; 267 #else 268 printf("kn300_iointr: (E)ISA interrupt support not configured" 269 " for vector 0x%x", vec); 270 kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ); 271 #endif 272 } 273 274 v = (int) vec - MCPCIA_VEC_PCI; 275 276 277 midx = v / 0x200; 278 gidx = midx / 4; 279 midx = midx % 4; 280 281 282 #ifdef EVCNT_COUNTERS 283 kn300_intr_evcnt.ev_count++; 284 #endif 285 /* 286 * Check for i2c bus interrupts XXXXXXXXX 287 */ 288 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_CVEC) { 289 #ifndef EVCNT_COUNTERS 290 intrcnt[INTRCNT_KN300_I2C_CTRL]++; 291 #endif 292 printf("i2c: controller interrupt\n"); 293 return; 294 } 295 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_BVEC) { 296 #ifndef EVCNT_COUNTERS 297 intrcnt[INTRCNT_KN300_I2C_BUS]++; 298 #endif 299 printf("i2c: bus interrupt\n"); 300 return; 301 } 302 303 304 /* 305 * Convert vector offset into a dense number. 306 */ 307 308 v /= 0x10; 309 #ifndef EVCNT_COUNTERS 310 if (savirqs[v] >= 0 && savirqs[v] <= INTRCNT_KN300_NCR810) { 311 intrcnt[INTRCNT_KN300_IRQ + savirqs[v]]++; 312 } 313 #endif 314 315 if (alpha_shared_intr_dispatch(kn300_pci_intr, v)) { 316 return; 317 } 318 /* 319 * Nobody fielded the interrupt? 320 */ 321 alpha_shared_intr_stray(kn300_pci_intr, savirqs[v], kn300_spurious(v)); 322 if (kn300_pci_intr[v].intr_nstrays < 323 kn300_pci_intr[v].intr_maxstrays) { 324 return; 325 } 326 /* 327 * Search for the controlling mcpcia. 328 */ 329 for (mcp = mcpcias; mcp != NULL; mcp = mcp->mcpcia_next) { 330 if (mcp->mcpcia_dev.dv_unit == savunit[v]) { 331 break; 332 } 333 } 334 /* 335 * And if found, disable this IRQ level. Guess what? 336 * This may kill other things too. 337 */ 338 if (mcp) { 339 kn300_disable_intr(&mcp->mcpcia_cc, savirqs[v]); 340 } 341 } 342 343 void 344 kn300_enable_intr(ccp, irq) 345 struct mcpcia_config *ccp; 346 int irq; 347 { 348 alpha_mb(); 349 REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) |= (1 << irq); 350 alpha_mb(); 351 } 352 353 void 354 kn300_disable_intr(ccp, irq) 355 struct mcpcia_config *ccp; 356 int irq; 357 { 358 alpha_mb(); 359 REGVAL(MCPCIA_INT_MASK0(ccp->cc_sc)) &= ~(1 << irq); 360 alpha_mb(); 361 } 362
Indexes created Mon Oct 13 04:09:54 GMT 2025