pci_kn300.c revision 1.11
1 /* $NetBSD: pci_kn300.c,v 1.11 1999/04/15 22:37:25 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 1.11 1999/04/15 22:37:25 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 #define NVEC (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) 79 static int savunit[NVEC]; 80 static int 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 > 0 125 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) { 126 sio_intr_setup(pc, &ccp->cc_iot); 127 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 128 } 129 #endif 130 } 131 132 int 133 dec_kn300_intr_map(ccv, bustag, buspin, line, ihp) 134 void *ccv; 135 pcitag_t bustag; 136 int buspin, line; 137 pci_intr_handle_t *ihp; 138 { 139 struct mcpcia_config *ccp = ccv; 140 pci_chipset_tag_t pc = &ccp->cc_pc; 141 int device; 142 int kn300_irq; 143 144 if (buspin == 0) { 145 /* No IRQ used. */ 146 return 1; 147 } 148 if (buspin > 4 || buspin < 0) { 149 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 150 return 1; 151 } 152 153 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 154 155 /* 156 * On MID 5 device 1 is the internal NCR 53c810. 157 */ 158 if (ccp->cc_mid == 5 && device == 1) { 159 kn300_irq = 16; 160 } else if (device >= 2 && device <= 5) { 161 kn300_irq = (device - 2) * 4; 162 } else { 163 printf("dec_kn300_intr_map: weird device number %d\n", device); 164 return(1); 165 } 166 167 /* 168 * handle layout: 169 * 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 * bits 11-15 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 (kn300_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 sprintf(irqstr, "kn300 irq %ld PCI Interrupt Pin %c", 192 (ih >> 11) & 0x1f, (int)(ih & 0x3) + 'A'); 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 void *cookie; 205 int v; 206 207 v = ih & 0x3ff; 208 cookie = alpha_shared_intr_establish(kn300_pci_intr, v, IST_LEVEL, 209 level, func, arg, "kn300 vector"); 210 211 if (cookie != NULL && alpha_shared_intr_isactive(kn300_pci_intr, v)) { 212 struct mcpcia_config *ccp = ccv; 213 savunit[v] = ccp->cc_sc->mcpcia_dev.dv_unit; 214 savirqs[v] = (ih >> 11) & 0x1f; 215 kn300_enable_intr(ccv, (int)((ih >> 11) & 0x1f)); 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 static char * 229 kn300_spurious(ih) 230 int ih; 231 { 232 static char str[48]; 233 int pidx, slot, midx, gidx; 234 235 pidx = ih & 0x3; 236 slot = (ih >> 2) & 0x7; 237 midx = (ih >> 5) & 0x7; 238 gidx = (ih >> 8) & 0x7; 239 sprintf(str, "mcbus%d mid %d PCI Slot %d PCI Interrupt Pin %c irq", 240 gidx, midx + 4, slot, pidx + 'A'); 241 return (str); 242 } 243 244 void 245 kn300_iointr(framep, vec) 246 void *framep; 247 unsigned long vec; 248 { 249 struct mcpcia_softc *mcp; 250 int v, gidx, midx; 251 extern struct cfdriver mcpcia_cd; 252 253 if (vec >= MCPCIA_VEC_EISA && vec < MCPCIA_VEC_PCI) { 254 #if NSIO > 0 255 sio_iointr(framep, vec); 256 return; 257 #else 258 printf("kn300_iointr: (E)ISA interrupt support not configured" 259 " for vector 0x%x", vec); 260 kn300_disable_intr(mcpcia_eisaccp, KN300_PCEB_IRQ); 261 #endif 262 } 263 264 v = (int) vec - MCPCIA_VEC_PCI; 265 266 midx = v / 0x200; 267 gidx = midx / 4; 268 midx = midx % 4; 269 270 271 #ifdef EVCNT_COUNTERS 272 kn300_intr_evcnt.ev_count++; 273 #endif 274 /* 275 * Check for i2c bus interrupts XXXXXXXXX 276 */ 277 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_CVEC) { 278 #ifndef EVCNT_COUNTERS 279 intrcnt[INTRCNT_KN300_I2C_CTRL]++; 280 #endif 281 printf("i2c: controller interrupt\n"); 282 return; 283 } 284 if (gidx == 0 && midx == 0 && vec == MCPCIA_I2C_BVEC) { 285 #ifndef EVCNT_COUNTERS 286 intrcnt[INTRCNT_KN300_I2C_BUS]++; 287 #endif 288 printf("i2c: bus interrupt\n"); 289 return; 290 } 291 292 293 /* 294 * Convert vector offset into a dense number. 295 */ 296 297 v /= 0x10; 298 #ifndef EVCNT_COUNTERS 299 if (savirqs[v] >= 0 && savirqs[v] <= INTRCNT_KN300_NCR810) { 300 intrcnt[INTRCNT_KN300_IRQ + savirqs[v]]++; 301 } 302 #endif 303 304 if (alpha_shared_intr_dispatch(kn300_pci_intr, v)) 305 return; 306 307 /* 308 * Stray interrupt; disable the IRQ on the appropriate MCPCIA 309 * if we've reached the limit. 310 */ 311 alpha_shared_intr_stray(kn300_pci_intr, savirqs[v], kn300_spurious(v)); 312 if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, v) == 0) 313 return; 314 315 mcp = mcpcia_cd.cd_devs[savunit[v]]; 316 kn300_disable_intr(mcp->mcpcia_cc, savirqs[v]); 317 } 318 319 void 320 kn300_enable_intr(ccp, irq) 321 struct mcpcia_config *ccp; 322 int irq; 323 { 324 alpha_mb(); 325 REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq); 326 alpha_mb(); 327 } 328 329 void 330 kn300_disable_intr(ccp, irq) 331 struct mcpcia_config *ccp; 332 int irq; 333 { 334 alpha_mb(); 335 REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq); 336 alpha_mb(); 337 } 338
Indexes created Mon Oct 13 00:09:54 GMT 2025