1 /* $NetBSD: empb.c,v 1.16 2023/12/20 00:40:42 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Radoslaw Kujawa. 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 /* Elbox Mediator PCI bridge driver. Currently supports Mediator 1200 models.*/ 33 34 #include <sys/types.h> 35 #include <sys/param.h> 36 #include <sys/time.h> 37 #include <sys/systm.h> 38 #include <sys/errno.h> 39 #include <sys/device.h> 40 #include <sys/kmem.h> 41 42 #include <uvm/uvm_extern.h> 43 44 #include <machine/bus.h> 45 #include <machine/cpu.h> 46 47 #include <amiga/dev/zbusvar.h> 48 #include <amiga/pci/empbreg.h> 49 #include <amiga/pci/empbvar.h> 50 #include <amiga/pci/emmemvar.h> 51 #include <amiga/pci/empmvar.h> 52 53 #include <dev/pci/pciconf.h> 54 55 #include "opt_pci.h" 56 57 /*#define EMPB_DEBUG 1 */ 58 59 #define PCI_CONF_LOCK(s) (s) = splhigh() 60 #define PCI_CONF_UNLOCK(s) splx((s)) 61 62 #define WINDOW_LOCK(s) (s) = splhigh() 63 #define WINDOW_UNLOCK(s) splx((s)) 64 65 static int empb_match(device_t, cfdata_t, void *); 66 static void empb_attach(device_t, device_t, void *); 67 static void empb_callback(device_t); 68 69 static void empb_empm_attach(struct empb_softc *sc); 70 static int empb_empm_print(void *aux, const char *pnp); 71 72 static void empb_find_mem(struct empb_softc *); 73 static void empb_switch_bridge(struct empb_softc *, uint8_t); 74 static void empb_intr_enable(struct empb_softc *); 75 76 pcireg_t empb_pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 77 void empb_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t); 78 int empb_pci_bus_maxdevs(pci_chipset_tag_t, int); 79 void empb_pci_attach_hook(device_t, device_t, 80 struct pcibus_attach_args *); 81 pcitag_t empb_pci_make_tag(pci_chipset_tag_t, int, int, int); 82 void empb_pci_decompose_tag(pci_chipset_tag_t, pcitag_t, 83 int *, int *, int *); 84 int empb_pci_intr_map(const struct pci_attach_args *, 85 pci_intr_handle_t *); 86 const struct evcnt * empb_pci_intr_evcnt(pci_chipset_tag_t, 87 pci_intr_handle_t); 88 int empb_pci_conf_hook(pci_chipset_tag_t, int, int, int, pcireg_t); 89 90 CFATTACH_DECL_NEW(empb, sizeof(struct empb_softc), 91 empb_match, empb_attach, NULL, NULL); 92 93 static int 94 empb_match(device_t parent, cfdata_t cf, void *aux) 95 { 96 struct zbus_args *zap; 97 98 zap = aux; 99 100 if (zap->manid != ZORRO_MANID_ELBOX) 101 return 0; 102 103 switch (zap->prodid) { 104 case ZORRO_PRODID_MED1K2: 105 case ZORRO_PRODID_MED1K2SX: 106 case ZORRO_PRODID_MED1K2LT2: 107 case ZORRO_PRODID_MED1K2LT4: 108 case ZORRO_PRODID_MED1K2TX: 109 case ZORRO_PRODID_MEDZIV: /* ZIV untested! */ 110 return 1; 111 } 112 113 return 0; 114 } 115 116 117 static void 118 empb_attach(device_t parent, device_t self, void *aux) 119 { 120 struct empb_softc *sc; 121 struct zbus_args *zap; 122 123 volatile char *ba; 124 125 zap = aux; 126 sc = device_private(self); 127 sc->sc_dev = self; 128 ba = zap->va; 129 130 sc->model = zap->prodid; 131 132 switch (sc->model) { 133 case ZORRO_PRODID_MED1K2: 134 aprint_normal(": ELBOX Mediator PCI 1200\n"); 135 break; 136 case ZORRO_PRODID_MED1K2SX: 137 aprint_normal(": ELBOX Mediator PCI 1200 SX\n"); 138 break; 139 case ZORRO_PRODID_MED1K2LT2: 140 aprint_normal(": ELBOX Mediator PCI 1200 LT2\n"); 141 break; 142 case ZORRO_PRODID_MED1K2LT4: 143 aprint_normal(": ELBOX Mediator PCI 1200 LT4\n"); 144 break; 145 case ZORRO_PRODID_MED1K2TX: 146 aprint_normal(": ELBOX Mediator PCI 1200 TX\n"); 147 break; 148 default: 149 aprint_normal(": ELBOX Mediator PCI (unknown)\n"); 150 break; 151 } 152 153 /* Setup bus space mappings. */ 154 sc->pci_confio_area.base = (bus_addr_t) ba + EMPB_BRIDGE_OFF; 155 sc->pci_confio_area.absm = &amiga_bus_stride_1swap; 156 157 sc->setup_area.base = (bus_addr_t) ba + EMPB_SETUP_OFF; 158 sc->setup_area.absm = &amiga_bus_stride_1; 159 160 /* 161 * Defer everything until later, we need to wait for possible 162 * emmem attachments. 163 */ 164 165 config_defer(self, empb_callback); 166 } 167 168 static void 169 empb_callback(device_t self) { 170 171 struct empb_softc *sc; 172 pci_chipset_tag_t pc; 173 struct pcibus_attach_args pba; 174 175 sc = device_private(self); 176 pc = &sc->apc; 177 178 #ifdef EMPB_DEBUG 179 aprint_normal("empb: mapped setup %x->%x, conf/io %x->%x\n", 180 kvtop((void*) sc->setup_area.base), sc->setup_area.base, 181 kvtop((void*) sc->pci_confio_area.base), sc->pci_confio_area.base); 182 #endif 183 184 sc->pci_confio_t = &(sc->pci_confio_area); 185 186 /* 187 * We should not map I/O space here, however we have no choice 188 * since these addresses are shared between configuration space and 189 * I/O space. Not really a problem on m68k, however on PPC... 190 */ 191 if (bus_space_map(sc->pci_confio_t, 0, EMPB_BRIDGE_SIZE, 0, 192 &sc->pci_confio_h)) 193 aprint_error_dev(self, 194 "couldn't map PCI configuration & I/O space\n"); 195 196 sc->apc.pci_conf_datat = sc->pci_confio_t; 197 sc->apc.pci_conf_datah = sc->pci_confio_h; 198 199 sc->setup_area_t = &(sc->setup_area); 200 201 if (bus_space_map(sc->setup_area_t, 0, EMPB_SETUP_SIZE, 0, 202 &sc->setup_area_h)) 203 aprint_error_dev(self, 204 "couldn't map Mediator setup space\n"); 205 206 empb_find_mem(sc); 207 if (sc->pci_mem_win_size == 0) 208 aprint_error_dev(self, 209 "couldn't find memory space, check your WINDOW jumper\n"); 210 211 /* Initialize the PCI chipset tag. */ 212 sc->apc.pc_conf_v = (void*) pc; 213 sc->apc.pc_bus_maxdevs = empb_pci_bus_maxdevs; 214 sc->apc.pc_make_tag = amiga_pci_make_tag; 215 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag; 216 sc->apc.pc_conf_read = empb_pci_conf_read; 217 sc->apc.pc_conf_write = empb_pci_conf_write; 218 sc->apc.pc_attach_hook = empb_pci_attach_hook; 219 220 sc->apc.pc_intr_map = empb_pci_intr_map; 221 sc->apc.pc_intr_string = amiga_pci_intr_string; 222 sc->apc.pc_intr_establish = amiga_pci_intr_establish; 223 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish; 224 225 sc->apc.pc_conf_hook = empb_pci_conf_hook; 226 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt; 227 228 sc->apc.cookie = sc; 229 230 #ifdef PCI_NETBSD_CONFIGURE 231 struct pciconf_resources *pcires = pciconf_resource_init(); 232 233 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO, 234 0, EMPB_BRIDGE_SIZE); 235 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM, 236 EMPB_MEM_BASE, EMPB_MEM_SIZE); 237 238 pci_configure_bus(pc, pcires, 0, CACHELINE_SIZE); 239 240 pciconf_resource_fini(pcires); 241 242 #endif /* PCI_NETBSD_CONFIGURE */ 243 244 pba.pba_iot = &(sc->pci_confio_area); 245 pba.pba_dmat = NULL; 246 pba.pba_dmat64 = NULL; 247 pba.pba_pc = pc; 248 pba.pba_flags = PCI_FLAGS_IO_OKAY; 249 250 if(sc->pci_mem_win_size > 0) { 251 pba.pba_memt = &(sc->pci_mem_win); 252 pba.pba_flags |= PCI_FLAGS_MEM_OKAY; 253 } else 254 pba.pba_memt = NULL; 255 256 pba.pba_bus = 0; 257 pba.pba_bridgetag = NULL; 258 259 /* Attach power management on SX and TX models. */ 260 switch (sc->model) { 261 case ZORRO_PRODID_MED1K2SX: 262 case ZORRO_PRODID_MED1K2TX: 263 empb_empm_attach(sc); 264 default: 265 break; 266 } 267 268 empb_intr_enable(sc); 269 270 config_found(self, &pba, pcibusprint, 271 CFARGS(.iattr = "pcibus")); 272 } 273 274 static void 275 empb_empm_attach(struct empb_softc *sc) 276 { 277 struct empm_attach_args aa; 278 aa.setup_area_t = sc->setup_area_t; 279 280 config_found(sc->sc_dev, &aa, empb_empm_print, 281 CFARGS(.iattr = "empmdev")); 282 } 283 284 static int 285 empb_empm_print(void *aux, const char *pnp) 286 { 287 if (pnp) 288 aprint_normal("empm at %s", pnp); 289 290 return UNCONF; 291 } 292 293 static void 294 empb_intr_enable(struct empb_softc *sc) 295 { 296 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 297 EMPB_SETUP_INTR_OFF, EMPB_INTR_ENABLE); 298 } 299 300 /* 301 * Switch between configuration space and I/O space. 302 */ 303 static void 304 empb_switch_bridge(struct empb_softc *sc, uint8_t mode) 305 { 306 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 307 EMPB_SETUP_BRIDGE_OFF, mode); 308 } 309 310 311 /* 312 * Try to find a (optional) memory window board. 313 */ 314 static void 315 empb_find_mem(struct empb_softc *sc) 316 { 317 device_t memdev; 318 struct emmem_softc *mem_sc; 319 320 memdev = device_find_by_xname("emmem0"); 321 sc->pci_mem_win_size = 0; 322 323 if(memdev == NULL) { 324 return; 325 } 326 327 mem_sc = device_private(memdev); 328 329 sc->pci_mem_win.base = (bus_addr_t) mem_sc->sc_base; 330 sc->pci_mem_win.absm = &empb_bus_swap; 331 sc->pci_mem_win_size = mem_sc->sc_size; 332 sc->pci_mem_win_t = &sc->pci_mem_win; 333 334 if(sc->pci_mem_win_size == 8*1024*1024) 335 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_8M; 336 else if(sc->pci_mem_win_size == 4*1024*1024) 337 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_4M; 338 else /* disable anyway */ 339 sc->pci_mem_win_size = 0; 340 341 #ifdef EMPB_DEBUG 342 aprint_normal("empb: found %x b window at %p, switch mask %x\n", 343 sc->pci_mem_win_size, (void*) sc->pci_mem_win.base, 344 sc->pci_mem_win_mask); 345 #endif /* EMPB_DEBUG */ 346 347 } 348 349 /* 350 * Switch memory window position. Return PCI mem address seen at the beginning 351 * of window. 352 */ 353 bus_addr_t 354 empb_switch_window(struct empb_softc *sc, bus_addr_t address) 355 { 356 int s; 357 uint16_t win_reg; 358 #ifdef EMPB_DEBUG 359 uint16_t rwin_reg; 360 #endif /* EMPB_DEBUG */ 361 362 WINDOW_LOCK(s); 363 364 win_reg = bswap16((address >> EMPB_WINDOW_SHIFT) 365 & sc->pci_mem_win_mask); 366 367 bus_space_write_2(sc->setup_area_t, sc->setup_area_h, 368 EMPB_SETUP_WINDOW_OFF, win_reg); 369 370 /* store window pos, like: sc->pci_mem_win_pos = win_reg ? */ 371 372 #ifdef EMPB_DEBUG 373 rwin_reg = bus_space_read_2(sc->setup_area_t, sc->setup_area_h, 374 EMPB_SETUP_WINDOW_OFF); 375 376 aprint_normal("empb: access to %p window switch to %x => reg now %x\n", 377 (void*) address, win_reg, rwin_reg); 378 #endif /* EMPB_DEBUG */ 379 380 WINDOW_UNLOCK(s); 381 382 return (bus_addr_t)((bswap16(win_reg)) << EMPB_WINDOW_SHIFT); 383 } 384 385 386 pcireg_t 387 empb_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 388 { 389 uint32_t data; 390 uint32_t bus, dev, func; 391 struct empb_softc *sc; 392 int s; 393 394 if ((unsigned int)reg >= PCI_CONF_SIZE) 395 return (pcireg_t) -1; 396 397 sc = pc->cookie; 398 399 pci_decompose_tag(pc, tag, &bus, &dev, &func); 400 401 PCI_CONF_LOCK(s); 402 403 empb_switch_bridge(sc, BRIDGE_CONF); 404 405 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah, 406 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg); 407 #ifdef EMPB_DEBUG_CONF 408 aprint_normal("empb conf read va: %lx, bus: %d, dev: %d, " 409 "func: %d, reg: %d -r-> data %x\n", 410 pc->pci_conf_datah, bus, dev, func, reg, data); 411 #endif /* EMPB_DEBUG_CONF */ 412 413 empb_switch_bridge(sc, BRIDGE_IO); 414 415 PCI_CONF_UNLOCK(s); 416 417 return data; 418 } 419 420 void 421 empb_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val) 422 { 423 uint32_t bus, dev, func; 424 struct empb_softc *sc; 425 int s; 426 427 if ((unsigned int)reg >= PCI_CONF_SIZE) 428 return; 429 430 sc = pc->cookie; 431 432 pci_decompose_tag(pc, tag, &bus, &dev, &func); 433 434 PCI_CONF_LOCK(s); 435 436 empb_switch_bridge(sc, BRIDGE_CONF); 437 438 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah, 439 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg, val); 440 #ifdef EMPB_DEBUG_CONF 441 aprint_normal("empb conf write va: %lx, bus: %d, dev: %d, " 442 "func: %d, reg: %d -w-> data %x\n", 443 pc->pci_conf_datah, bus, dev, func, reg, val); 444 #endif /* EMPB_DEBUG_CONF */ 445 empb_switch_bridge(sc, BRIDGE_IO); 446 447 PCI_CONF_UNLOCK(s); 448 } 449 450 int 451 empb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 452 { 453 return 6; /* no Mediator with more than 6 slots? */ 454 } 455 456 void 457 empb_pci_attach_hook(device_t parent, device_t self, 458 struct pcibus_attach_args *pba) 459 { 460 } 461 462 int 463 empb_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 464 { 465 /* TODO: add sanity checking */ 466 467 *ihp = EMPB_INT; 468 return 0; 469 } 470 471 const struct evcnt * 472 empb_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 473 { 474 /* TODO: implement */ 475 return NULL; 476 } 477 478 int 479 empb_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, 480 pcireg_t id) 481 { 482 483 /* 484 * Register information about some known PCI devices with 485 * DMA-able memory. 486 */ 487 /*if ((PCI_VENDOR(id) == PCI_VENDOR_3DFX) && 488 (PCI_PRODUCT(id) >= PCI_PRODUCT_3DFX_VOODOO3))*/ 489 490 491 return PCI_CONF_DEFAULT; 492 } 493
Indexes created Tue Sep 30 11:09:46 GMT 2025