1 /* $NetBSD: pci_kn300.c,v 1.33 2010/12/15 01:27:19 matt 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 1.33 2010/12/15 01:27:19 matt 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 <machine/autoconf.h> 47 48 #include <dev/pci/pcireg.h> 49 #include <dev/pci/pcivar.h> 50 51 #include <alpha/mcbus/mcbusvar.h> 52 #include <alpha/mcbus/mcbusreg.h> 53 #include <alpha/pci/mcpciareg.h> 54 #include <alpha/pci/mcpciavar.h> 55 #include <alpha/pci/pci_kn300.h> 56 57 #include "sio.h" 58 #if NSIO > 0 || NPCEB > 0 59 #include <alpha/pci/siovar.h> 60 #endif 61 62 int dec_kn300_intr_map(struct pci_attach_args *, 63 pci_intr_handle_t *); 64 const char *dec_kn300_intr_string(void *, pci_intr_handle_t); 65 const struct evcnt *dec_kn300_intr_evcnt(void *, pci_intr_handle_t); 66 void *dec_kn300_intr_establish(void *, pci_intr_handle_t, 67 int, int (*func)(void *), void *); 68 void dec_kn300_intr_disestablish(void *, void *); 69 70 #define KN300_PCEB_IRQ 16 71 #define NPIN 4 72 73 #define NIRQ (MAX_MC_BUS * MCPCIA_PER_MCBUS * MCPCIA_MAXSLOT * NPIN) 74 static int savirqs[NIRQ]; 75 76 static struct alpha_shared_intr *kn300_pci_intr; 77 78 static struct mcpcia_config *mcpcia_eisaccp = NULL; 79 80 void kn300_iointr(void *, unsigned long); 81 void kn300_enable_intr(struct mcpcia_config *, int); 82 void kn300_disable_intr(struct mcpcia_config *, int); 83 84 void 85 pci_kn300_pickintr(struct mcpcia_config *ccp, int first) 86 { 87 char *cp; 88 pci_chipset_tag_t pc = &ccp->cc_pc; 89 90 if (first) { 91 int g; 92 93 kn300_pci_intr = alpha_shared_intr_alloc(NIRQ, 16); 94 for (g = 0; g < NIRQ; g++) { 95 alpha_shared_intr_set_maxstrays(kn300_pci_intr, g, 25); 96 cp = alpha_shared_intr_string(kn300_pci_intr, g); 97 sprintf(cp, "irq %d", g); 98 evcnt_attach_dynamic(alpha_shared_intr_evcnt( 99 kn300_pci_intr, g), EVCNT_TYPE_INTR, NULL, 100 "kn300", cp); 101 savirqs[g] = (char) -1; 102 } 103 } 104 105 pc->pc_intr_v = ccp; 106 pc->pc_intr_map = dec_kn300_intr_map; 107 pc->pc_intr_string = dec_kn300_intr_string; 108 pc->pc_intr_evcnt = dec_kn300_intr_evcnt; 109 pc->pc_intr_establish = dec_kn300_intr_establish; 110 pc->pc_intr_disestablish = dec_kn300_intr_disestablish; 111 112 /* Not supported on KN300. */ 113 pc->pc_pciide_compat_intr_establish = NULL; 114 115 if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) { 116 mcpcia_eisaccp = ccp; 117 #if NSIO > 0 || NPCEB > 0 118 sio_intr_setup(pc, &ccp->cc_iot); 119 kn300_enable_intr(ccp, KN300_PCEB_IRQ); 120 #endif 121 } 122 } 123 124 int 125 dec_kn300_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) 126 { 127 pcitag_t bustag = pa->pa_intrtag; 128 int buspin = pa->pa_intrpin; 129 pci_chipset_tag_t pc = pa->pa_pc; 130 struct mcpcia_config *ccp = (struct mcpcia_config *)pc->pc_intr_v; 131 int device; 132 int mcpcia_irq; 133 134 if (buspin == 0) { 135 /* No IRQ used. */ 136 return 1; 137 } 138 if (buspin > 4 || buspin < 0) { 139 printf("dec_kn300_intr_map: bad interrupt pin %d\n", buspin); 140 return 1; 141 } 142 143 pci_decompose_tag(pc, bustag, NULL, &device, NULL); 144 145 /* 146 * On MID 5 device 1 is the internal NCR 53c810. 147 */ 148 if (ccp->cc_mid == 5 && device == 1) { 149 mcpcia_irq = 16; 150 } else if (device >= 2 && device <= 5) { 151 mcpcia_irq = (device - 2) * 4 + buspin - 1; 152 } else { 153 printf("dec_kn300_intr_map: weird device number %d\n", device); 154 return(1); 155 } 156 157 /* 158 * handle layout: 159 * 160 * Determine kn300 IRQ (encoded in SCB vector): 161 * bits 0..1 buspin-1 162 * bits 2..4 PCI Slot (0..7- yes, some don't exist) 163 * bits 5..7 MID-4 164 * bits 8..10 7-GID 165 * 166 * Software only: 167 * bits 11-15 MCPCIA IRQ 168 */ 169 *ihp = (pci_intr_handle_t) 170 (buspin - 1 ) | 171 ((device & 0x7) << 2) | 172 ((ccp->cc_mid - 4) << 5) | 173 ((7 - ccp->cc_gid) << 8) | 174 (mcpcia_irq << 11); 175 return (0); 176 } 177 178 const char * 179 dec_kn300_intr_string(void *ccv, pci_intr_handle_t ih) 180 { 181 static char irqstr[64]; 182 183 sprintf(irqstr, "kn300 irq %ld", ih & 0x3ff); 184 return (irqstr); 185 } 186 187 const struct evcnt * 188 dec_kn300_intr_evcnt(void *ccv, pci_intr_handle_t ih) 189 { 190 191 return (alpha_shared_intr_evcnt(kn300_pci_intr, ih & 0x3ff)); 192 } 193 194 void * 195 dec_kn300_intr_establish(ccv, ih, level, func, arg) 196 void *ccv; 197 pci_intr_handle_t ih; 198 int level; 199 int (*func)(void *); 200 void *arg; 201 { 202 struct mcpcia_config *ccp = ccv; 203 void *cookie; 204 int irq; 205 206 irq = ih & 0x3ff; 207 cookie = alpha_shared_intr_establish(kn300_pci_intr, irq, IST_LEVEL, 208 level, func, arg, "kn300 irq"); 209 210 if (cookie != NULL && 211 alpha_shared_intr_firstactive(kn300_pci_intr, irq)) { 212 scb_set(MCPCIA_VEC_PCI + SCB_IDXTOVEC(irq), 213 kn300_iointr, NULL, level); 214 alpha_shared_intr_set_private(kn300_pci_intr, irq, ccp); 215 savirqs[irq] = (ih >> 11) & 0x1f; 216 kn300_enable_intr(ccp, savirqs[irq]); 217 alpha_mb(); 218 } 219 return (cookie); 220 } 221 222 void 223 dec_kn300_intr_disestablish(void *ccv, void *cookie) 224 { 225 panic("dec_kn300_intr_disestablish not implemented"); 226 } 227 228 void 229 kn300_iointr(void *arg, unsigned long vec) 230 { 231 struct mcpcia_softc *mcp; 232 u_long irq; 233 234 irq = SCB_VECTOIDX(vec - MCPCIA_VEC_PCI); 235 236 if (alpha_shared_intr_dispatch(kn300_pci_intr, irq)) { 237 /* 238 * Any claim of an interrupt at this level is a hint to 239 * reset the stray interrupt count- elsewise a slow leak 240 * over time will cause this level to be shutdown. 241 */ 242 alpha_shared_intr_reset_strays(kn300_pci_intr, irq); 243 return; 244 } 245 246 /* 247 * If we haven't finished configuring yet, or there is no mcp 248 * registered for this level yet, just return. 249 */ 250 mcp = alpha_shared_intr_get_private(kn300_pci_intr, irq); 251 if (mcp == NULL || mcp->mcpcia_cc == NULL) 252 return; 253 254 /* 255 * We're getting an interrupt for a device we haven't enabled. 256 * We had better not try and use -1 to find the right bit to disable. 257 */ 258 if (savirqs[irq] == -1) { 259 printf("kn300_iointr: stray interrupt vector 0x%lx\n", vec); 260 return; 261 } 262 263 /* 264 * Stray interrupt; disable the IRQ on the appropriate MCPCIA 265 * if we've reached the limit. 266 */ 267 alpha_shared_intr_stray(kn300_pci_intr, irq, "kn300 irq"); 268 if (ALPHA_SHARED_INTR_DISABLE(kn300_pci_intr, irq) == 0) 269 return; 270 kn300_disable_intr(mcp->mcpcia_cc, savirqs[irq]); 271 } 272 273 void 274 kn300_enable_intr(struct mcpcia_config *ccp, int irq) 275 { 276 alpha_mb(); 277 REGVAL(MCPCIA_INT_MASK0(ccp)) |= (1 << irq); 278 alpha_mb(); 279 } 280 281 void 282 kn300_disable_intr(struct mcpcia_config *ccp, int irq) 283 { 284 alpha_mb(); 285 REGVAL(MCPCIA_INT_MASK0(ccp)) &= ~(1 << irq); 286 alpha_mb(); 287 } 288