1 /* $NetBSD: isa_machdep.c,v 1.42 2022/09/25 12:41:46 andvar Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: isa_machdep.c,v 1.42 2022/09/25 12:41:46 andvar Exp $"); 34 35 #include "opt_vr41xx.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/reboot.h> 40 #include <sys/device.h> 41 42 #include <dev/isa/isavar.h> 43 #include <dev/isa/isareg.h> 44 45 #include <machine/platid.h> 46 #include <machine/platid_mask.h> 47 #include <machine/bus.h> 48 #include <machine/bus_space_hpcmips.h> 49 #include <machine/debug.h> 50 51 #include <dev/hpc/hpciovar.h> 52 53 #include <hpcmips/vr/vripif.h> 54 55 #include "locators.h" 56 57 #define VRISADEBUG 58 59 #ifdef VRISADEBUG 60 #ifndef VRISADEBUG_CONF 61 #define VRISADEBUG_CONF 0 62 #endif /* VRISADEBUG_CONF */ 63 int vrisa_debug = VRISADEBUG_CONF; 64 #define DPRINTF(arg) if (vrisa_debug) printf arg; 65 #define DBITDISP(mask) if (vrisa_debug) dbg_bit_print(mask); 66 #define VPRINTF(arg) if (bootverbose || vrisa_debug) printf arg; 67 #else /* VRISADEBUG */ 68 #define DPRINTF(arg) 69 #define DBITDISP(mask) 70 #define VPRINTF(arg) if (bootverbose) printf arg; 71 #endif /* VRISADEBUG */ 72 73 /* 74 * interrupt no. encoding: 75 * 76 * 0x0000000f ISA IRQ# 77 * 0x00ff0000 GPIO port# 78 * 0x01000000 interrupt signal hold/through (1:hold/0:though) 79 * 0x02000000 interrupt detection level (1:low /0:high ) 80 * 0x04000000 interrupt detection trigger (1:edge/0:level ) 81 */ 82 #define INTR_IRQ(i) (((i)>> 0) & 0x0f) 83 #define INTR_PORT(i) (((i)>>16) & 0xff) 84 #define INTR_MODE(i) (((i)>>24) & 0x07) 85 #define INTR_NIRQS 16 86 87 int vrisabprint(void *, const char *); 88 int vrisabmatch(device_t, cfdata_t, void *); 89 void vrisabattach(device_t, device_t, void *); 90 91 struct vrisab_softc { 92 hpcio_chip_t sc_hc; 93 int sc_intr_map[INTR_NIRQS]; /* ISA <-> GIU interrupt line mapping */ 94 struct hpcmips_isa_chipset sc_isa_ic; 95 }; 96 97 CFATTACH_DECL_NEW(vrisab, sizeof(struct vrisab_softc), 98 vrisabmatch, vrisabattach, NULL, NULL); 99 100 #ifdef DEBUG_FIND_PCIC 101 #include <mips/cpuregs.h> 102 #warning DEBUG_FIND_PCIC 103 static void __find_pcic(void); 104 #endif 105 106 #ifdef DEBUG_FIND_COMPORT 107 #include <mips/cpuregs.h> 108 #include <dev/ic/ns16550reg.h> 109 #include <dev/ic/comreg.h> 110 #warning DEBUG_FIND_COMPORT 111 static void __find_comport(void); 112 #endif 113 114 int 115 vrisabmatch(device_t parent, cfdata_t match, void *aux) 116 { 117 struct hpcio_attach_args *haa = aux; 118 platid_mask_t mask; 119 int n; 120 121 if (strcmp(haa->haa_busname, match->cf_name)) 122 return (0); 123 124 if (match->cf_loc[HPCIOIFCF_PLATFORM] == HPCIOIFCF_PLATFORM_DEFAULT) 125 return (1); 126 127 mask = PLATID_DEREF(match->cf_loc[HPCIOIFCF_PLATFORM]); 128 if ((n = platid_match(&platid, &mask)) != 0) 129 return (n + 2); 130 131 return (0); 132 } 133 134 void 135 vrisabattach(device_t parent, device_t self, void *aux) 136 { 137 struct hpcio_attach_args *haa = aux; 138 struct vrisab_softc *sc = device_private(self); 139 struct isabus_attach_args iba; 140 struct bus_space_tag_hpcmips *iot, *memt; 141 bus_addr_t offset; 142 int i; 143 144 sc->sc_hc = (*haa->haa_getchip)(haa->haa_sc, VRIP_IOCHIP_VRGIU); 145 sc->sc_isa_ic.ic_sc = sc; 146 147 iba.iba_ic = &sc->sc_isa_ic; 148 iba.iba_dmat = 0; /* XXX not yet */ 149 150 /* Allocate ISA memory space */ 151 memt = hpcmips_alloc_bus_space_tag(); 152 offset = device_cfdata(self)->cf_loc[VRISABIFCF_ISAMEMOFFSET]; 153 hpcmips_init_bus_space(memt, 154 (struct bus_space_tag_hpcmips *)haa->haa_iot, "ISA mem", 155 VR_ISA_MEM_BASE + offset, VR_ISA_MEM_SIZE - offset); 156 iba.iba_memt = &memt->bst; 157 158 /* Allocate ISA port space */ 159 iot = hpcmips_alloc_bus_space_tag(); 160 offset = device_cfdata(self)->cf_loc[VRISABIFCF_ISAPORTOFFSET]; 161 hpcmips_init_bus_space(iot, 162 (struct bus_space_tag_hpcmips *)haa->haa_iot, "ISA port", 163 VR_ISA_PORT_BASE + offset, VR_ISA_PORT_SIZE - offset); 164 iba.iba_iot = &iot->bst; 165 166 #ifdef DEBUG_FIND_PCIC 167 #warning DEBUG_FIND_PCIC 168 __find_pcic(); 169 #else 170 /* Initialize ISA IRQ <-> GPIO mapping */ 171 for (i = 0; i < INTR_NIRQS; i++) 172 sc->sc_intr_map[i] = -1; 173 printf(": ISA port %#x-%#x mem %#x-%#x\n", 174 iot->base, iot->base + iot->size, 175 memt->base, memt->base + memt->size); 176 config_found(self, &iba, vrisabprint, CFARGS_NONE); 177 #endif 178 179 #ifdef DEBUG_FIND_COMPORT 180 #warning DEBUG_FIND_COMPORT 181 __find_comport(); 182 #endif 183 } 184 185 int 186 vrisabprint(void *aux, const char *pnp) 187 { 188 if (pnp) 189 return (QUIET); 190 191 return (UNCONF); 192 } 193 194 void 195 isa_attach_hook(device_t parent, device_t self, 196 struct isabus_attach_args *iba) 197 { 198 199 } 200 201 void 202 isa_detach_hook(isa_chipset_tag_t ic, device_t self) 203 { 204 } 205 206 const struct evcnt * 207 isa_intr_evcnt(isa_chipset_tag_t ic, int irq) 208 { 209 210 /* XXX for now, no evcnt parent reported */ 211 return (NULL); 212 } 213 214 void * 215 isa_intr_establish(isa_chipset_tag_t ic, int intr, int type, int level, 216 int (*ih_fun)(void*), void *ih_arg) 217 { 218 struct vrisab_softc *sc = ic->ic_sc; 219 int port, irq, mode; 220 221 static int intr_modes[8] = { 222 HPCIO_INTR_LEVEL_HIGH_THROUGH, 223 HPCIO_INTR_LEVEL_HIGH_HOLD, 224 HPCIO_INTR_LEVEL_LOW_THROUGH, 225 HPCIO_INTR_LEVEL_LOW_HOLD, 226 HPCIO_INTR_EDGE_THROUGH, 227 HPCIO_INTR_EDGE_HOLD, 228 HPCIO_INTR_EDGE_THROUGH, 229 HPCIO_INTR_EDGE_HOLD, 230 }; 231 #ifdef VRISADEBUG 232 static const char* intr_mode_names[8] = { 233 "level high through", 234 "level high hold", 235 "level low through", 236 "level low hold", 237 "edge through", 238 "edge hold", 239 "edge through", 240 "edge hold", 241 }; 242 #endif /* VRISADEBUG */ 243 /* 244 * ISA IRQ <-> GPIO port mapping 245 */ 246 irq = INTR_IRQ(intr); 247 if (sc->sc_intr_map[irq] != -1) { 248 /* already mapped */ 249 intr = sc->sc_intr_map[irq]; 250 } else { 251 /* not mapped yet */ 252 sc->sc_intr_map[irq] = intr; /* Register it */ 253 } 254 mode = INTR_MODE(intr); 255 port = INTR_PORT(intr); 256 257 VPRINTF(("ISA IRQ %d -> %s port %d, %s\n", 258 irq, sc->sc_hc->hc_name, port, intr_mode_names[mode])); 259 260 /* Call Vr routine */ 261 return (hpcio_intr_establish(sc->sc_hc, port, intr_modes[mode], 262 ih_fun, ih_arg)); 263 } 264 265 void 266 isa_intr_disestablish(isa_chipset_tag_t ic, void *arg) 267 { 268 struct vrisab_softc *sc = ic->ic_sc; 269 /* Call Vr routine */ 270 hpcio_intr_disestablish(sc->sc_hc, arg); 271 } 272 273 int 274 isa_intr_alloc(isa_chipset_tag_t ic, int mask, int type, int *irq) 275 { 276 /* XXX not coded yet. this is temporary XXX */ 277 DPRINTF(("isa_intr_alloc:")); 278 DBITDISP(mask); 279 *irq = (ffs(mask) -1); /* XXX */ 280 281 return (0); 282 } 283 284 #ifdef DEBUG_FIND_PCIC 285 #warning DEBUG_FIND_PCIC 286 static void 287 __find_pcic(void) 288 { 289 int i, j, step, found; 290 u_int32_t addr; 291 u_int8_t reg; 292 int __read_revid (u_int32_t port) 293 { 294 addr = MIPS_PHYS_TO_KSEG1(i + port); 295 printf("%#x\r", i); 296 for (found = 0, j = 0; j < 0x100; j += 0x40) { 297 *((volatile u_int8_t *)addr) = j; 298 reg = *((volatile u_int8_t *)(addr + 1)); 299 #ifdef DEBUG_FIND_PCIC_I82365SL_ONLY 300 if (reg == 0x82 || reg == 0x83) { 301 #else 302 if ((reg & 0xc0) == 0x80) { 303 #endif 304 found++; 305 } 306 if (found) 307 printf("\nfound %d socket at %#x" 308 "(base from %#x)\n", found, addr, 309 i + port - VR_ISA_PORT_BASE); 310 } 311 } 312 step = 0x1000000; 313 printf("\nFinding PCIC. Trying ISA port %#x-%#x step %#x\n", 314 VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE, step); 315 for (i = VR_ISA_PORT_BASE; i < VR_ISA_PORT_BASE+VR_ISA_PORT_SIZE; 316 i+= step) { 317 __read_revid (0x3e0); 318 __read_revid (0x3e2); 319 } 320 } 321 #endif /* DEBUG_FIND_PCIC */ 322 323 324 #ifdef DEBUG_FIND_COMPORT 325 #warning DEBUG_FIND_COMPORT 326 327 static int probe_com(u_int32_t); 328 329 static int 330 probe_com(u_int32_t port_addr) 331 { 332 u_int32_t addr; 333 u_int8_t ubtmp1, ubtmp2; 334 335 addr = MIPS_PHYS_TO_KSEG1(port_addr); 336 337 *((volatile u_int8_t *)(addr + com_cfcr)) = LCR_8BITS; 338 *((volatile u_int8_t *)(addr + com_iir)) = 0; 339 340 ubtmp1 = *((volatile u_int8_t *)(addr + com_cfcr)); 341 ubtmp2 = *((volatile u_int8_t *)(addr + com_iir)); 342 343 if ((ubtmp1 != LCR_8BITS) || ((ubtmp2 & 0x38) != 0)) { 344 return (0); 345 } 346 347 return (1); 348 } 349 350 static void 351 __find_comport(void) 352 { 353 int found; 354 u_int32_t port, step; 355 356 found = 0; 357 step = 0x08; 358 359 printf("Searching COM port. Trying ISA port %#x-%#x step %#x\n", 360 VR_ISA_PORT_BASE, VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE - 1, step ); 361 362 for (port = VR_ISA_PORT_BASE; 363 port < (VR_ISA_PORT_BASE + VR_ISA_PORT_SIZE); port += step){ 364 if (probe_com(port)) { 365 found++; 366 printf("found %d at %#x\n", found, port); 367 } 368 } 369 } 370 #endif /* DEBUG_FIND_COMPORT */ 371
Indexes created Sun Oct 25 00:26:45 UTC 2026