empb.c revision 1.15
1 /* $NetBSD: empb.c,v 1.15 2021/08/07 16:18:42 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/malloc.h> 41 #include <sys/kmem.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <machine/bus.h> 46 #include <machine/cpu.h> 47 48 #include <amiga/dev/zbusvar.h> 49 #include <amiga/pci/empbreg.h> 50 #include <amiga/pci/empbvar.h> 51 #include <amiga/pci/emmemvar.h> 52 #include <amiga/pci/empmvar.h> 53 54 #include <dev/pci/pciconf.h> 55 56 #include "opt_pci.h" 57 58 /*#define EMPB_DEBUG 1 */ 59 60 #define PCI_CONF_LOCK(s) (s) = splhigh() 61 #define PCI_CONF_UNLOCK(s) splx((s)) 62 63 #define WINDOW_LOCK(s) (s) = splhigh() 64 #define WINDOW_UNLOCK(s) splx((s)) 65 66 static int empb_match(device_t, cfdata_t, void *); 67 static void empb_attach(device_t, device_t, void *); 68 static void empb_callback(device_t); 69 70 static void empb_empm_attach(struct empb_softc *sc); 71 static int empb_empm_print(void *aux, const char *pnp); 72 73 static void empb_find_mem(struct empb_softc *); 74 static void empb_switch_bridge(struct empb_softc *, uint8_t); 75 static void empb_intr_enable(struct empb_softc *); 76 77 pcireg_t empb_pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 78 void empb_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t); 79 int empb_pci_bus_maxdevs(pci_chipset_tag_t, int); 80 void empb_pci_attach_hook(device_t, device_t, 81 struct pcibus_attach_args *); 82 pcitag_t empb_pci_make_tag(pci_chipset_tag_t, int, int, int); 83 void empb_pci_decompose_tag(pci_chipset_tag_t, pcitag_t, 84 int *, int *, int *); 85 int empb_pci_intr_map(const struct pci_attach_args *, 86 pci_intr_handle_t *); 87 const struct evcnt * empb_pci_intr_evcnt(pci_chipset_tag_t, 88 pci_intr_handle_t); 89 int empb_pci_conf_hook(pci_chipset_tag_t, int, int, int, pcireg_t); 90 91 CFATTACH_DECL_NEW(empb, sizeof(struct empb_softc), 92 empb_match, empb_attach, NULL, NULL); 93 94 static int 95 empb_match(device_t parent, cfdata_t cf, void *aux) 96 { 97 struct zbus_args *zap; 98 99 zap = aux; 100 101 if (zap->manid != ZORRO_MANID_ELBOX) 102 return 0; 103 104 switch (zap->prodid) { 105 case ZORRO_PRODID_MED1K2: 106 case ZORRO_PRODID_MED1K2SX: 107 case ZORRO_PRODID_MED1K2LT2: 108 case ZORRO_PRODID_MED1K2LT4: 109 case ZORRO_PRODID_MED1K2TX: 110 case ZORRO_PRODID_MEDZIV: /* ZIV untested! */ 111 return 1; 112 } 113 114 return 0; 115 } 116 117 118 static void 119 empb_attach(device_t parent, device_t self, void *aux) 120 { 121 struct empb_softc *sc; 122 struct zbus_args *zap; 123 124 volatile char *ba; 125 126 zap = aux; 127 sc = device_private(self); 128 sc->sc_dev = self; 129 ba = zap->va; 130 131 sc->model = zap->prodid; 132 133 switch (sc->model) { 134 case ZORRO_PRODID_MED1K2: 135 aprint_normal(": ELBOX Mediator PCI 1200\n"); 136 break; 137 case ZORRO_PRODID_MED1K2SX: 138 aprint_normal(": ELBOX Mediator PCI 1200 SX\n"); 139 break; 140 case ZORRO_PRODID_MED1K2LT2: 141 aprint_normal(": ELBOX Mediator PCI 1200 LT2\n"); 142 break; 143 case ZORRO_PRODID_MED1K2LT4: 144 aprint_normal(": ELBOX Mediator PCI 1200 LT4\n"); 145 break; 146 case ZORRO_PRODID_MED1K2TX: 147 aprint_normal(": ELBOX Mediator PCI 1200 TX\n"); 148 break; 149 default: 150 aprint_normal(": ELBOX Mediator PCI (unknown)\n"); 151 break; 152 } 153 154 /* Setup bus space mappings. */ 155 sc->pci_confio_area.base = (bus_addr_t) ba + EMPB_BRIDGE_OFF; 156 sc->pci_confio_area.absm = &amiga_bus_stride_1swap; 157 158 sc->setup_area.base = (bus_addr_t) ba + EMPB_SETUP_OFF; 159 sc->setup_area.absm = &amiga_bus_stride_1; 160 161 /* 162 * Defer everything until later, we need to wait for possible 163 * emmem attachments. 164 */ 165 166 config_defer(self, empb_callback); 167 } 168 169 static void 170 empb_callback(device_t self) { 171 172 struct empb_softc *sc; 173 pci_chipset_tag_t pc; 174 struct pcibus_attach_args pba; 175 176 sc = device_private(self); 177 pc = &sc->apc; 178 179 #ifdef EMPB_DEBUG 180 aprint_normal("empb: mapped setup %x->%x, conf/io %x->%x\n", 181 kvtop((void*) sc->setup_area.base), sc->setup_area.base, 182 kvtop((void*) sc->pci_confio_area.base), sc->pci_confio_area.base); 183 #endif 184 185 sc->pci_confio_t = &(sc->pci_confio_area); 186 187 /* 188 * We should not map I/O space here, however we have no choice 189 * since these addresses are shared between configuration space and 190 * I/O space. Not really a problem on m68k, however on PPC... 191 */ 192 if (bus_space_map(sc->pci_confio_t, 0, EMPB_BRIDGE_SIZE, 0, 193 &sc->pci_confio_h)) 194 aprint_error_dev(self, 195 "couldn't map PCI configuration & I/O space\n"); 196 197 sc->apc.pci_conf_datat = sc->pci_confio_t; 198 sc->apc.pci_conf_datah = sc->pci_confio_h; 199 200 sc->setup_area_t = &(sc->setup_area); 201 202 if (bus_space_map(sc->setup_area_t, 0, EMPB_SETUP_SIZE, 0, 203 &sc->setup_area_h)) 204 aprint_error_dev(self, 205 "couldn't map Mediator setup space\n"); 206 207 empb_find_mem(sc); 208 if (sc->pci_mem_win_size == 0) 209 aprint_error_dev(self, 210 "couldn't find memory space, check your WINDOW jumper\n"); 211 212 /* Initialize the PCI chipset tag. */ 213 sc->apc.pc_conf_v = (void*) pc; 214 sc->apc.pc_bus_maxdevs = empb_pci_bus_maxdevs; 215 sc->apc.pc_make_tag = amiga_pci_make_tag; 216 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag; 217 sc->apc.pc_conf_read = empb_pci_conf_read; 218 sc->apc.pc_conf_write = empb_pci_conf_write; 219 sc->apc.pc_attach_hook = empb_pci_attach_hook; 220 221 sc->apc.pc_intr_map = empb_pci_intr_map; 222 sc->apc.pc_intr_string = amiga_pci_intr_string; 223 sc->apc.pc_intr_establish = amiga_pci_intr_establish; 224 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish; 225 226 sc->apc.pc_conf_hook = empb_pci_conf_hook; 227 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt; 228 229 sc->apc.cookie = sc; 230 231 #ifdef PCI_NETBSD_CONFIGURE 232 struct pciconf_resources *pcires = pciconf_resource_init(); 233 234 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO, 235 0, EMPB_BRIDGE_SIZE); 236 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM, 237 EMPB_MEM_BASE, EMPB_MEM_SIZE); 238 239 pci_configure_bus(pc, pcires, 0, CACHELINE_SIZE); 240 241 pciconf_resource_fini(pcires); 242 243 #endif /* PCI_NETBSD_CONFIGURE */ 244 245 pba.pba_iot = &(sc->pci_confio_area); 246 pba.pba_dmat = NULL; 247 pba.pba_dmat64 = NULL; 248 pba.pba_pc = pc; 249 pba.pba_flags = PCI_FLAGS_IO_OKAY; 250 251 if(sc->pci_mem_win_size > 0) { 252 pba.pba_memt = &(sc->pci_mem_win); 253 pba.pba_flags |= PCI_FLAGS_MEM_OKAY; 254 } else 255 pba.pba_memt = NULL; 256 257 pba.pba_bus = 0; 258 pba.pba_bridgetag = NULL; 259 260 /* Attach power management on SX and TX models. */ 261 switch (sc->model) { 262 case ZORRO_PRODID_MED1K2SX: 263 case ZORRO_PRODID_MED1K2TX: 264 empb_empm_attach(sc); 265 default: 266 break; 267 } 268 269 empb_intr_enable(sc); 270 271 config_found(self, &pba, pcibusprint, 272 CFARGS(.iattr = "pcibus")); 273 } 274 275 static void 276 empb_empm_attach(struct empb_softc *sc) 277 { 278 struct empm_attach_args aa; 279 aa.setup_area_t = sc->setup_area_t; 280 281 config_found(sc->sc_dev, &aa, empb_empm_print, 282 CFARGS(.iattr = "empmdev")); 283 } 284 285 static int 286 empb_empm_print(void *aux, const char *pnp) 287 { 288 if (pnp) 289 aprint_normal("empm at %s", pnp); 290 291 return UNCONF; 292 } 293 294 static void 295 empb_intr_enable(struct empb_softc *sc) 296 { 297 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 298 EMPB_SETUP_INTR_OFF, EMPB_INTR_ENABLE); 299 } 300 301 /* 302 * Switch between configuration space and I/O space. 303 */ 304 static void 305 empb_switch_bridge(struct empb_softc *sc, uint8_t mode) 306 { 307 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 308 EMPB_SETUP_BRIDGE_OFF, mode); 309 } 310 311 312 /* 313 * Try to find a (optional) memory window board. 314 */ 315 static void 316 empb_find_mem(struct empb_softc *sc) 317 { 318 device_t memdev; 319 struct emmem_softc *mem_sc; 320 321 memdev = device_find_by_xname("emmem0"); 322 sc->pci_mem_win_size = 0; 323 324 if(memdev == NULL) { 325 return; 326 } 327 328 mem_sc = device_private(memdev); 329 330 sc->pci_mem_win.base = (bus_addr_t) mem_sc->sc_base; 331 sc->pci_mem_win.absm = &empb_bus_swap; 332 sc->pci_mem_win_size = mem_sc->sc_size; 333 sc->pci_mem_win_t = &sc->pci_mem_win; 334 335 if(sc->pci_mem_win_size == 8*1024*1024) 336 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_8M; 337 else if(sc->pci_mem_win_size == 4*1024*1024) 338 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_4M; 339 else /* disable anyway */ 340 sc->pci_mem_win_size = 0; 341 342 #ifdef EMPB_DEBUG 343 aprint_normal("empb: found %x b window at %p, switch mask %x\n", 344 sc->pci_mem_win_size, (void*) sc->pci_mem_win.base, 345 sc->pci_mem_win_mask); 346 #endif /* EMPB_DEBUG */ 347 348 } 349 350 /* 351 * Switch memory window position. Return PCI mem address seen at the beginning 352 * of window. 353 */ 354 bus_addr_t 355 empb_switch_window(struct empb_softc *sc, bus_addr_t address) 356 { 357 int s; 358 uint16_t win_reg; 359 #ifdef EMPB_DEBUG 360 uint16_t rwin_reg; 361 #endif /* EMPB_DEBUG */ 362 363 WINDOW_LOCK(s); 364 365 win_reg = bswap16((address >> EMPB_WINDOW_SHIFT) 366 & sc->pci_mem_win_mask); 367 368 bus_space_write_2(sc->setup_area_t, sc->setup_area_h, 369 EMPB_SETUP_WINDOW_OFF, win_reg); 370 371 /* store window pos, like: sc->pci_mem_win_pos = win_reg ? */ 372 373 #ifdef EMPB_DEBUG 374 rwin_reg = bus_space_read_2(sc->setup_area_t, sc->setup_area_h, 375 EMPB_SETUP_WINDOW_OFF); 376 377 aprint_normal("empb: access to %p window switch to %x => reg now %x\n", 378 (void*) address, win_reg, rwin_reg); 379 #endif /* EMPB_DEBUG */ 380 381 WINDOW_UNLOCK(s); 382 383 return (bus_addr_t)((bswap16(win_reg)) << EMPB_WINDOW_SHIFT); 384 } 385 386 387 pcireg_t 388 empb_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 389 { 390 uint32_t data; 391 uint32_t bus, dev, func; 392 struct empb_softc *sc; 393 int s; 394 395 if ((unsigned int)reg >= PCI_CONF_SIZE) 396 return (pcireg_t) -1; 397 398 sc = pc->cookie; 399 400 pci_decompose_tag(pc, tag, &bus, &dev, &func); 401 402 PCI_CONF_LOCK(s); 403 404 empb_switch_bridge(sc, BRIDGE_CONF); 405 406 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah, 407 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg); 408 #ifdef EMPB_DEBUG_CONF 409 aprint_normal("empb conf read va: %lx, bus: %d, dev: %d, " 410 "func: %d, reg: %d -r-> data %x\n", 411 pc->pci_conf_datah, bus, dev, func, reg, data); 412 #endif /* EMPB_DEBUG_CONF */ 413 414 empb_switch_bridge(sc, BRIDGE_IO); 415 416 PCI_CONF_UNLOCK(s); 417 418 return data; 419 } 420 421 void 422 empb_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val) 423 { 424 uint32_t bus, dev, func; 425 struct empb_softc *sc; 426 int s; 427 428 if ((unsigned int)reg >= PCI_CONF_SIZE) 429 return; 430 431 sc = pc->cookie; 432 433 pci_decompose_tag(pc, tag, &bus, &dev, &func); 434 435 PCI_CONF_LOCK(s); 436 437 empb_switch_bridge(sc, BRIDGE_CONF); 438 439 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah, 440 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg, val); 441 #ifdef EMPB_DEBUG_CONF 442 aprint_normal("empb conf write va: %lx, bus: %d, dev: %d, " 443 "func: %d, reg: %d -w-> data %x\n", 444 pc->pci_conf_datah, bus, dev, func, reg, val); 445 #endif /* EMPB_DEBUG_CONF */ 446 empb_switch_bridge(sc, BRIDGE_IO); 447 448 PCI_CONF_UNLOCK(s); 449 } 450 451 int 452 empb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 453 { 454 return 6; /* no Mediator with more than 6 slots? */ 455 } 456 457 void 458 empb_pci_attach_hook(device_t parent, device_t self, 459 struct pcibus_attach_args *pba) 460 { 461 } 462 463 int 464 empb_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 465 { 466 /* TODO: add sanity checking */ 467 468 *ihp = EMPB_INT; 469 return 0; 470 } 471 472 const struct evcnt * 473 empb_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 474 { 475 /* TODO: implement */ 476 return NULL; 477 } 478 479 int 480 empb_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, 481 pcireg_t id) 482 { 483 484 /* 485 * Register information about some known PCI devices with 486 * DMA-able memory. 487 */ 488 /*if ((PCI_VENDOR(id) == PCI_VENDOR_3DFX) && 489 (PCI_PRODUCT(id) >= PCI_PRODUCT_3DFX_VOODOO3))*/ 490 491 492 return PCI_CONF_DEFAULT; 493 } 494
Indexes created Tue Sep 30 20:09:53 GMT 2025