pci_kn300.c revision 1.19
1 /* $NetBSD: pci_kn300.c,v 1.19 2000/06/04 19:14:24 cgd 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 1.19 2000/06/04 19:14:24 cgd 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 > 0 || NPCEB > 0 65 #include <alpha/pci/siovar.h> 66 #endif 67 68 int dec_kn300_intr_map __P((void *, pcitag_t, int, int, 69 pci_intr_handle_t *)); 70 const char *dec_kn300_intr_string __P((void *, pci_intr_handle_t)); 71 const struct evcnt *dec_kn300_intr_evcnt __P((void *, pci_intr_handle_t)); 72 void *dec_kn300_intr_establish __P((void *, pci_intr_handle_t, 73 int, int (*func)(void *), void *)); 74 void dec_kn300_intr_disestablish __P((void *, void *)); 75 76 #define KN300_PCEB_IRQ 16 77 #define NPIN 4 78 79 #define NIRQ (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) 80 static int savirqs[NIRQ]; 81 82 static struct alpha_shared_intr *kn300_pci_intr; 83 84 static struct mcpcia_config *mcpcia_eisaccp = NULL; 85 86 #ifdef EVCNT_COUNTERS 87 struct evcnt kn300_intr_evcnt; 88 #endif 89 90 void kn300_iointr __P((void *, unsigned long)); 91 void kn300_enable_intr __P((struct mcpcia_config *, int)); 92 void kn300_disable_intr __P((struct mcpcia_config *, int)); 93 94 void 95 pci_kn300_pickintr(ccp, first) 96 struct mcpcia_config *ccp; 97 int first; 98 { 99 pci_chipset_tag_t pc = &ccp->cc_pc; 100 101 if (first) { 102 int g; 103 104 kn300_pci_intr = alpha_shared_intr_alloc(NIRQ); 105 for (g = 0; g < NIRQ; g++) { 106 alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25); 107 savirqs[g] = (char) -1; 108 } 109 set_iointr(kn300_iointr); 110 } 111 112 pc->pc_intr_v = ccp; 113 pc->pc_intr_map = dec_kn300_intr_map; 114 pc->pc_intr_string = dec_kn300_intr_string; 115 pc->pc_intr_evcnt = dec_kn300_intr_evcnt; 116 pc->pc_intr_establish = dec_kn300_intr_establish; 117 pc->pc_intr_disestablish = dec_kn300_intr_disestablish; 118 119 /* Not supported on KN300. */ 120 pc->pc_pciide_compat_intr_establish = NULL; 121 122 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) { 123 mcpcia_eisaccp = ccp; 124 #if NSIO > 0 || NPCEB > 0 125 sio_intr_setup(pc, &ccp->cc_iot); 126 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 127 #endif 128 } 129 } 130 131 int 132 dec_kn300_intr_map(ccv, bustag, buspin, line, ihp) 133 void *ccv; 134 pcitag_t bustag; 135 int buspin, line; 136 pci_intr_handle_t *ihp; 137 { 138 struct mcpcia_config *ccp = ccv; 139 pci_chipset_tag_t pc = &ccp->cc_pc; 140 int device; 141 int mcpcia_irq; 142 143 if (buspin == 0) { 144 /* No IRQ used. */ 145 return 1; 146 } 147 if (buspin > 4 || buspin < 0) { 148 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 149 return 1; 150 } 151 152 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 153 154 /* 155 * On MID 5 device 1 is the internal NCR 53c810. 156 */ 157 if (ccp->cc_mid == 5 && device == 1) { 158 mcpcia_irq = 16; 159 } else if (device >= 2 && device <= 5) { 160 mcpcia_irq = (device - 2) * 4; 161 } else { 162 printf("dec_kn300_intr_map: weird device number %d\n", device); 163 return(1); 164 } 165 166 /* 167 * handle layout: 168 * 169 * Determine kn300 IRQ (encoded in SCB vector): 170 * bits 0..1 buspin-1 171 * bits 2..4 PCI Slot (0..7- yes, some don't exist) 172 * bits 5..7 MID-4 173 * bits 8..10 7-GID 174 * 175 * Software only: 176 * bits 11-15 MCPCIA IRQ 177 */ 178 *ihp = (pci_intr_handle_t) 179 (buspin - 1 ) | 180 ((device & 0x7) << 2) | 181 ((ccp->cc_mid - 4) << 5) | 182 ((7 - ccp->cc_gid) << 8) | 183 (mcpcia_irq << 11); 184 return (0); 185 } 186 187 const char * 188 dec_kn300_intr_string(ccv, ih) 189 void *ccv; 190 pci_intr_handle_t ih; 191 { 192 static char irqstr[64]; 193 194 sprintf(irqstr, "kn300 irq %ld", ih & 0x3ff); 195 return (irqstr); 196 } 197 198 const struct evcnt * 199 dec_kn300_intr_evcnt(ccv, ih) 200 void *ccv; 201 pci_intr_handle_t ih; 202 { 203 204 /* XXX for now, no evcnt parent reported */ 205 return (NULL); 206 } 207 208 void * 209 dec_kn300_intr_establish(ccv, ih, level, func, arg) 210 void *ccv; 211 pci_intr_handle_t ih; 212 int level; 213 int (*func) __P((void *)); 214 void *arg; 215 { 216 struct mcpcia_config *ccp = ccv; 217 void *cookie; 218 int irq; 219 220 irq = ih & 0x3ff; 221 cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL, 222 level, func, arg, "kn300 irq"); 223 224 if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, irq)) { 225 alpha_shared_intr_set_private(kn300_pci_intr, irq, ccp); 226 savirqs[irq] = (ih >> 11) & 0x1f; 227 kn300_enable_intr(ccp, savirqs[irq]); 228 alpha_mb(); 229 } 230 return (cookie); 231 } 232 233 void 234 dec_kn300_intr_disestablish(ccv, cookie) 235 void *ccv, *cookie; 236 { 237 panic("dec_kn300_intr_disestablish not implemented"); 238 } 239 240 void 241 kn300_iointr(framep, vec) 242 void *framep; 243 unsigned long vec; 244 { 245 struct mcpcia_softc *mcp; 246 u_long irq; 247 248 if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) { 249 #if NSIO > 0 || NPCEB > 0 250 sio_iointr(framep, vec); 251 return; 252 #else 253 static const char *plaint = "kn300_iointr: (E)ISA interrupt " 254 "support not configured for vector 0x%x"; 255 if (mcpcia_eisaccp) { 256 kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ); 257 printf(plaint, vec); 258 } else { 259 panic(plaint, vec); 260 } 261 #endif 262 } 263 264 #ifdef EVCNT_COUNTERS 265 kn300_intr_evcnt.ev_count++; 266 #endif 267 268 irq = (vec - MCPCIA_VEC_PCI) >> 4; 269 270 /* 271 * Check for I2C interrupts. These are technically within 272 * the PCI vector range, but no PCI device should ever map 273 * to them. 274 */ 275 if (vec == MCPCIA_I2C_CVEC) { 276 #ifndef EVCNT_COUNTERS 277 intrcnt[INTRCNT_KN300_I2C_CTRL]++; 278 #endif 279 printf("i2c: controller interrupt\n"); 280 return; 281 } 282 if (vec == MCPCIA_I2C_BVEC) { 283 #ifndef EVCNT_COUNTERS 284 intrcnt[INTRCNT_KN300_I2C_BUS]++; 285 #endif 286 printf("i2c: bus interrupt\n"); 287 return; 288 } 289 290 #ifndef EVCNT_COUNTERS 291 if (savirqs[irq] >= 0 && savirqs[irq] <= INTRCNT_KN300_NCR810) { 292 intrcnt[INTRCNT_KN300_IRQ + savirqs[irq]]++; 293 } 294 #endif 295 296 if (alpha_shared_intr_dispatch(kn300_pci_intr, irq)) { 297 /* 298 * Any claim of an interrupt at this level is a hint to 299 * reset the stray interrupt count- elsewise a slow leak 300 * over time will cause this level to be shutdown. 301 */ 302 alpha_shared_intr_set_maxstrays(kn300_pci_intr, irq, 25); 303 return; 304 } 305 306 /* 307 * If we haven't finished configuring yet, or there is no mcp 308 * registered for this level yet, just return. 309 */ 310 mcp = alpha_shared_intr_get_private(kn300_pci_intr, irq); 311 if (mcp == NULL || mcp->mcpcia_cc == NULL) 312 return; 313 314 /* 315 * We're getting an interrupt for a device we haven't enabled. 316 * We had better not try and use -1 to find the right bit to disable. 317 */ 318 if (savirqs[irq] == -1) { 319 printf("kn300_iointr: stray interrupt vector 0x%lx\n", vec); 320 return; 321 } 322 323 /* 324 * Stray interrupt; disable the IRQ on the appropriate MCPCIA 325 * if we've reached the limit. 326 */ 327 alpha_shared_intr_stray(kn300_pci_intr, irq, "kn300 irq"); 328 if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0) 329 return; 330 kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]); 331 } 332 333 void 334 kn300_enable_intr(ccp, irq) 335 struct mcpcia_config *ccp; 336 int irq; 337 { 338 alpha_mb(); 339 REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq); 340 alpha_mb(); 341 } 342 343 void 344 kn300_disable_intr(ccp, irq) 345 struct mcpcia_config *ccp; 346 int irq; 347 { 348 alpha_mb(); 349 REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq); 350 alpha_mb(); 351 } 352
Indexes created Mon Oct 13 00:09:54 GMT 2025