pci_kn300.c revision 1.18
1 /* $NetBSD: pci_kn300.c,v 1.18 2000/02/10 07:45:43 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 1.18 2000/02/10 07:45:43 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 > 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 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 NIRQ (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) 79 static int savirqs[NIRQ]; 80 81 static struct alpha_shared_intr *kn300_pci_intr; 82 83 static struct mcpcia_config *mcpcia_eisaccp = NULL; 84 85 #ifdef EVCNT_COUNTERS 86 struct evcnt kn300_intr_evcnt; 87 #endif 88 89 void kn300_iointr __P((void *, unsigned long)); 90 void kn300_enable_intr __P((struct mcpcia_config *, int)); 91 void kn300_disable_intr __P((struct mcpcia_config *, int)); 92 93 void 94 pci_kn300_pickintr(ccp, first) 95 struct mcpcia_config *ccp; 96 int first; 97 { 98 pci_chipset_tag_t pc = &ccp->cc_pc; 99 100 if (first) { 101 int g; 102 103 kn300_pci_intr = alpha_shared_intr_alloc(NIRQ); 104 for (g = 0; g < NIRQ; g++) { 105 alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25); 106 savirqs[g] = (char) -1; 107 } 108 set_iointr(kn300_iointr); 109 } 110 111 pc->pc_intr_v = ccp; 112 pc->pc_intr_map = dec_kn300_intr_map; 113 pc->pc_intr_string = dec_kn300_intr_string; 114 pc->pc_intr_establish = dec_kn300_intr_establish; 115 pc->pc_intr_disestablish = dec_kn300_intr_disestablish; 116 117 /* Not supported on KN300. */ 118 pc->pc_pciide_compat_intr_establish = NULL; 119 120 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) { 121 mcpcia_eisaccp = ccp; 122 #if NSIO > 0 || NPCEB > 0 123 sio_intr_setup(pc, &ccp->cc_iot); 124 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 125 #endif 126 } 127 } 128 129 int 130 dec_kn300_intr_map(ccv, bustag, buspin, line, ihp) 131 void *ccv; 132 pcitag_t bustag; 133 int buspin, line; 134 pci_intr_handle_t *ihp; 135 { 136 struct mcpcia_config *ccp = ccv; 137 pci_chipset_tag_t pc = &ccp->cc_pc; 138 int device; 139 int mcpcia_irq; 140 141 if (buspin == 0) { 142 /* No IRQ used. */ 143 return 1; 144 } 145 if (buspin > 4 || buspin < 0) { 146 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 147 return 1; 148 } 149 150 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 151 152 /* 153 * On MID 5 device 1 is the internal NCR 53c810. 154 */ 155 if (ccp->cc_mid == 5 && device == 1) { 156 mcpcia_irq = 16; 157 } else if (device >= 2 && device <= 5) { 158 mcpcia_irq = (device - 2) * 4; 159 } else { 160 printf("dec_kn300_intr_map: weird device number %d\n", device); 161 return(1); 162 } 163 164 /* 165 * handle layout: 166 * 167 * Determine kn300 IRQ (encoded in SCB vector): 168 * bits 0..1 buspin-1 169 * bits 2..4 PCI Slot (0..7- yes, some don't exist) 170 * bits 5..7 MID-4 171 * bits 8..10 7-GID 172 * 173 * Software only: 174 * bits 11-15 MCPCIA IRQ 175 */ 176 *ihp = (pci_intr_handle_t) 177 (buspin - 1 ) | 178 ((device & 0x7) << 2) | 179 ((ccp->cc_mid - 4) << 5) | 180 ((7 - ccp->cc_gid) << 8) | 181 (mcpcia_irq << 11); 182 return (0); 183 } 184 185 const char * 186 dec_kn300_intr_string(ccv, ih) 187 void *ccv; 188 pci_intr_handle_t ih; 189 { 190 static char irqstr[64]; 191 192 sprintf(irqstr, "kn300 irq %ld", ih & 0x3ff); 193 return (irqstr); 194 } 195 196 void * 197 dec_kn300_intr_establish(ccv, ih, level, func, arg) 198 void *ccv; 199 pci_intr_handle_t ih; 200 int level; 201 int (*func) __P((void *)); 202 void *arg; 203 { 204 struct mcpcia_config *ccp = ccv; 205 void *cookie; 206 int irq; 207 208 irq = ih & 0x3ff; 209 cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL, 210 level, func, arg, "kn300 irq"); 211 212 if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, irq)) { 213 alpha_shared_intr_set_private(kn300_pci_intr, irq, ccp); 214 savirqs[irq] = (ih >> 11) & 0x1f; 215 kn300_enable_intr(ccp, savirqs[irq]); 216 alpha_mb(); 217 } 218 return (cookie); 219 } 220 221 void 222 dec_kn300_intr_disestablish(ccv, cookie) 223 void *ccv, *cookie; 224 { 225 panic("dec_kn300_intr_disestablish not implemented"); 226 } 227 228 void 229 kn300_iointr(framep, vec) 230 void *framep; 231 unsigned long vec; 232 { 233 struct mcpcia_softc *mcp; 234 u_long irq; 235 236 if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) { 237 #if NSIO > 0 || NPCEB > 0 238 sio_iointr(framep, vec); 239 return; 240 #else 241 static const char *plaint = "kn300_iointr: (E)ISA interrupt " 242 "support not configured for vector 0x%x"; 243 if (mcpcia_eisaccp) { 244 kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ); 245 printf(plaint, vec); 246 } else { 247 panic(plaint, vec); 248 } 249 #endif 250 } 251 252 #ifdef EVCNT_COUNTERS 253 kn300_intr_evcnt.ev_count++; 254 #endif 255 256 irq = (vec - MCPCIA_VEC_PCI) >> 4; 257 258 /* 259 * Check for I2C interrupts. These are technically within 260 * the PCI vector range, but no PCI device should ever map 261 * to them. 262 */ 263 if (vec == MCPCIA_I2C_CVEC) { 264 #ifndef EVCNT_COUNTERS 265 intrcnt[INTRCNT_KN300_I2C_CTRL]++; 266 #endif 267 printf("i2c: controller interrupt\n"); 268 return; 269 } 270 if (vec == MCPCIA_I2C_BVEC) { 271 #ifndef EVCNT_COUNTERS 272 intrcnt[INTRCNT_KN300_I2C_BUS]++; 273 #endif 274 printf("i2c: bus interrupt\n"); 275 return; 276 } 277 278 #ifndef EVCNT_COUNTERS 279 if (savirqs[irq] >= 0 && savirqs[irq] <= INTRCNT_KN300_NCR810) { 280 intrcnt[INTRCNT_KN300_IRQ + savirqs[irq]]++; 281 } 282 #endif 283 284 if (alpha_shared_intr_dispatch(kn300_pci_intr, irq)) { 285 /* 286 * Any claim of an interrupt at this level is a hint to 287 * reset the stray interrupt count- elsewise a slow leak 288 * over time will cause this level to be shutdown. 289 */ 290 alpha_shared_intr_set_maxstrays(kn300_pci_intr, irq, 25); 291 return; 292 } 293 294 /* 295 * If we haven't finished configuring yet, or there is no mcp 296 * registered for this level yet, just return. 297 */ 298 mcp = alpha_shared_intr_get_private(kn300_pci_intr, irq); 299 if (mcp == NULL || mcp->mcpcia_cc == NULL) 300 return; 301 302 /* 303 * We're getting an interrupt for a device we haven't enabled. 304 * We had better not try and use -1 to find the right bit to disable. 305 */ 306 if (savirqs[irq] == -1) { 307 printf("kn300_iointr: stray interrupt vector 0x%lx\n", vec); 308 return; 309 } 310 311 /* 312 * Stray interrupt; disable the IRQ on the appropriate MCPCIA 313 * if we've reached the limit. 314 */ 315 alpha_shared_intr_stray(kn300_pci_intr, irq, "kn300 irq"); 316 if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0) 317 return; 318 kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]); 319 } 320 321 void 322 kn300_enable_intr(ccp, irq) 323 struct mcpcia_config *ccp; 324 int irq; 325 { 326 alpha_mb(); 327 REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq); 328 alpha_mb(); 329 } 330 331 void 332 kn300_disable_intr(ccp, irq) 333 struct mcpcia_config *ccp; 334 int irq; 335 { 336 alpha_mb(); 337 REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq); 338 alpha_mb(); 339 } 340
Indexes created Mon Oct 13 00:09:54 GMT 2025