empb.c revision 1.8
1 /* $NetBSD: empb.c,v 1.8 2012/10/27 17:17:34 chs 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/extent.h> 42 #include <sys/kmem.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/bus.h> 47 #include <machine/cpu.h> 48 49 #include <amiga/dev/zbusvar.h> 50 #include <amiga/pci/empbreg.h> 51 #include <amiga/pci/empbvar.h> 52 #include <amiga/pci/emmemvar.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 69 static void empb_callback(device_t); 70 71 static void empb_find_mem(struct empb_softc *); 72 static void empb_switch_bridge(struct empb_softc *, uint8_t); 73 static void empb_intr_enable(struct empb_softc *); 74 75 pcireg_t empb_pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 76 void empb_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t); 77 int empb_pci_bus_maxdevs(pci_chipset_tag_t, int); 78 void empb_pci_attach_hook(device_t, device_t, 79 struct pcibus_attach_args *); 80 pcitag_t empb_pci_make_tag(pci_chipset_tag_t, int, int, int); 81 void empb_pci_decompose_tag(pci_chipset_tag_t, pcitag_t, 82 int *, int *, int *); 83 int empb_pci_intr_map(const struct pci_attach_args *, 84 pci_intr_handle_t *); 85 const struct evcnt * empb_pci_intr_evcnt(pci_chipset_tag_t, 86 pci_intr_handle_t); 87 int empb_pci_conf_hook(pci_chipset_tag_t, int, int, int, pcireg_t); 88 89 CFATTACH_DECL_NEW(empb, sizeof(struct empb_softc), 90 empb_match, empb_attach, NULL, NULL); 91 92 static int 93 empb_match(device_t parent, cfdata_t cf, void *aux) 94 { 95 struct zbus_args *zap; 96 97 zap = aux; 98 99 if (zap->manid != ZORRO_MANID_ELBOX) 100 return 0; 101 102 switch (zap->prodid) { 103 case ZORRO_PRODID_MED1K2: 104 case ZORRO_PRODID_MED1K2SX: 105 case ZORRO_PRODID_MED1K2LT2: 106 case ZORRO_PRODID_MED1K2LT4: 107 case ZORRO_PRODID_MED1K2TX: 108 return 1; 109 } 110 111 return 0; 112 } 113 114 115 static void 116 empb_attach(device_t parent, device_t self, void *aux) 117 { 118 struct empb_softc *sc; 119 struct zbus_args *zap; 120 121 volatile char *ba; 122 123 zap = aux; 124 sc = device_private(self); 125 sc->sc_dev = self; 126 ba = zap->va; 127 128 switch (zap->prodid) { 129 case ZORRO_PRODID_MED1K2: 130 aprint_normal(": ELBOX Mediator PCI 1200\n"); 131 break; 132 case ZORRO_PRODID_MED1K2SX: 133 aprint_normal(": ELBOX Mediator PCI 1200 SX\n"); 134 break; 135 case ZORRO_PRODID_MED1K2LT2: 136 aprint_normal(": ELBOX Mediator PCI 1200 LT2\n"); 137 break; 138 case ZORRO_PRODID_MED1K2LT4: 139 aprint_normal(": ELBOX Mediator PCI 1200 LT4\n"); 140 break; 141 case ZORRO_PRODID_MED1K2TX: 142 aprint_normal(": ELBOX Mediator PCI 1200 TX\n"); 143 break; 144 default: 145 aprint_normal(": ELBOX Mediator PCI (unknown)\n"); 146 break; 147 } 148 149 /* Setup bus space mappings. */ 150 sc->pci_confio_area.base = (bus_addr_t) ba + EMPB_BRIDGE_OFF; 151 sc->pci_confio_area.absm = &amiga_bus_stride_1swap; 152 153 sc->setup_area.base = (bus_addr_t) ba + EMPB_SETUP_OFF; 154 sc->setup_area.absm = &amiga_bus_stride_1; 155 156 /* 157 * Defer everything until later, we need to wait for possible 158 * emmem attachments. 159 */ 160 161 config_defer(self, empb_callback); 162 } 163 164 static void 165 empb_callback(device_t self) { 166 167 struct empb_softc *sc; 168 pci_chipset_tag_t pc; 169 struct pcibus_attach_args pba; 170 #ifdef PCI_NETBSD_CONFIGURE 171 struct extent *ioext, *memext; 172 #endif /* PCI_NETBSD_CONFIGURE */ 173 174 sc = device_private(self); 175 pc = &sc->apc; 176 177 #ifdef EMPB_DEBUG 178 aprint_normal("empb: mapped setup %x->%x, conf/io %x->%x\n", 179 kvtop((void*) sc->setup_area.base), sc->setup_area.base, 180 kvtop((void*) sc->pci_confio_area.base), sc->pci_confio_area.base); 181 #endif 182 183 sc->pci_confio_t = &(sc->pci_confio_area); 184 185 /* 186 * We should not map I/O space here, however we have no choice 187 * since these addresses are shared between configuration space and 188 * I/O space. Not really a problem on m68k, however on PPC... 189 */ 190 if (bus_space_map(sc->pci_confio_t, 0, EMPB_BRIDGE_SIZE, 0, 191 &sc->pci_confio_h)) 192 aprint_error_dev(self, 193 "couldn't map PCI configuration & I/O space\n"); 194 195 sc->apc.pci_conf_datat = sc->pci_confio_t; 196 sc->apc.pci_conf_datah = sc->pci_confio_h; 197 198 sc->setup_area_t = &(sc->setup_area); 199 200 if (bus_space_map(sc->setup_area_t, 0, EMPB_SETUP_SIZE, 0, 201 &sc->setup_area_h)) 202 aprint_error_dev(self, 203 "couldn't map Mediator setup space\n"); 204 205 empb_find_mem(sc); 206 if (sc->pci_mem_win_size == 0) 207 aprint_error_dev(self, 208 "couldn't find memory space, check your WINDOW jumper\n"); 209 210 /* Initialize the PCI chipset tag. */ 211 sc->apc.pc_conf_v = (void*) pc; 212 sc->apc.pc_bus_maxdevs = empb_pci_bus_maxdevs; 213 sc->apc.pc_make_tag = amiga_pci_make_tag; 214 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag; 215 sc->apc.pc_conf_read = empb_pci_conf_read; 216 sc->apc.pc_conf_write = empb_pci_conf_write; 217 sc->apc.pc_attach_hook = empb_pci_attach_hook; 218 219 sc->apc.pc_intr_map = empb_pci_intr_map; 220 sc->apc.pc_intr_string = amiga_pci_intr_string; 221 sc->apc.pc_intr_establish = amiga_pci_intr_establish; 222 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish; 223 224 sc->apc.pc_conf_hook = empb_pci_conf_hook; 225 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt; 226 227 sc->apc.cookie = sc; 228 229 #ifdef PCI_NETBSD_CONFIGURE 230 ioext = extent_create("empbio", 0, EMPB_BRIDGE_SIZE, 231 NULL, 0, EX_NOWAIT); 232 233 memext = extent_create("empbmem", EMPB_MEM_BASE, EMPB_MEM_END, 234 NULL, 0, EX_NOWAIT); 235 236 pci_configure_bus(pc, ioext, memext, NULL, 0, CACHELINE_SIZE); 237 238 extent_destroy(ioext); 239 extent_destroy(memext); 240 241 #endif /* PCI_NETBSD_CONFIGURE */ 242 243 pba.pba_iot = &(sc->pci_confio_area); 244 pba.pba_dmat = NULL; 245 pba.pba_dmat64 = NULL; 246 pba.pba_pc = pc; 247 pba.pba_flags = PCI_FLAGS_IO_OKAY; 248 249 if(sc->pci_mem_win_size > 0) { 250 pba.pba_memt = &(sc->pci_mem_win); 251 pba.pba_flags |= PCI_FLAGS_MEM_OKAY; 252 } else 253 pba.pba_memt = NULL; 254 255 pba.pba_bus = 0; 256 pba.pba_bridgetag = NULL; 257 258 empb_intr_enable(sc); 259 260 config_found_ia(self, "pcibus", &pba, pcibusprint); 261 } 262 263 static void 264 empb_intr_enable(struct empb_softc *sc) 265 { 266 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 267 EMPB_SETUP_INTR_OFF, EMPB_INTR_ENABLE); 268 } 269 270 /* 271 * Switch between configuration space and I/O space. 272 */ 273 static void 274 empb_switch_bridge(struct empb_softc *sc, uint8_t mode) 275 { 276 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 277 EMPB_SETUP_BRIDGE_OFF, mode); 278 } 279 280 281 /* 282 * Try to find a (optional) memory window board. 283 */ 284 static void 285 empb_find_mem(struct empb_softc *sc) 286 { 287 device_t memdev; 288 struct emmem_softc *mem_sc; 289 290 memdev = device_find_by_xname("emmem0"); 291 sc->pci_mem_win_size = 0; 292 293 if(memdev == NULL) { 294 return; 295 } 296 297 mem_sc = device_private(memdev); 298 299 sc->pci_mem_win.base = (bus_addr_t) mem_sc->sc_base; 300 sc->pci_mem_win.absm = &empb_bus_swap; 301 sc->pci_mem_win_size = mem_sc->sc_size; 302 sc->pci_mem_win_t = &sc->pci_mem_win; 303 304 if(sc->pci_mem_win_size == 8*1024*1024) 305 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_8M; 306 else if(sc->pci_mem_win_size == 4*1024*1024) 307 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_4M; 308 else /* disable anyway */ 309 sc->pci_mem_win_size = 0; 310 311 #ifdef EMPB_DEBUG 312 aprint_normal("empb: found %x b window at %p, switch mask %x\n", 313 sc->pci_mem_win_size, (void*) sc->pci_mem_win.base, 314 sc->pci_mem_win_mask); 315 #endif /* EMPB_DEBUG */ 316 317 } 318 319 /* 320 * Switch memory window position. Return PCI mem address seen at the beginning 321 * of window. 322 */ 323 bus_addr_t 324 empb_switch_window(struct empb_softc *sc, bus_addr_t address) 325 { 326 int s; 327 uint16_t win_reg; 328 #ifdef EMPB_DEBUG 329 uint16_t rwin_reg; 330 #endif /* EMPB_DEBUG */ 331 332 WINDOW_LOCK(s); 333 334 win_reg = bswap16((address >> EMPB_WINDOW_SHIFT) 335 & sc->pci_mem_win_mask); 336 337 bus_space_write_2(sc->setup_area_t, sc->setup_area_h, 338 EMPB_SETUP_WINDOW_OFF, win_reg); 339 340 /* store window pos, like: sc->pci_mem_win_pos = win_reg ? */ 341 342 #ifdef EMPB_DEBUG 343 rwin_reg = bus_space_read_2(sc->setup_area_t, sc->setup_area_h, 344 EMPB_SETUP_WINDOW_OFF); 345 346 aprint_normal("empb: access to %p window switch to %x => reg now %x\n", 347 (void*) address, win_reg, rwin_reg); 348 #endif /* EMPB_DEBUG */ 349 350 WINDOW_UNLOCK(s); 351 352 return (bus_addr_t)((bswap16(win_reg)) << EMPB_WINDOW_SHIFT); 353 } 354 355 356 pcireg_t 357 empb_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 358 { 359 uint32_t data; 360 uint32_t bus, dev, func; 361 struct empb_softc *sc; 362 int s; 363 364 sc = pc->cookie; 365 366 pci_decompose_tag(pc, tag, &bus, &dev, &func); 367 368 PCI_CONF_LOCK(s); 369 370 empb_switch_bridge(sc, BRIDGE_CONF); 371 372 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah, 373 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg); 374 #ifdef EMPB_DEBUG_CONF 375 aprint_normal("empb conf read va: %lx, bus: %d, dev: %d, " 376 "func: %d, reg: %d -r-> data %x\n", 377 pc->pci_conf_datah, bus, dev, func, reg, data); 378 #endif /* EMPB_DEBUG_CONF */ 379 380 empb_switch_bridge(sc, BRIDGE_IO); 381 382 PCI_CONF_UNLOCK(s); 383 384 return data; 385 } 386 387 void 388 empb_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val) 389 { 390 uint32_t bus, dev, func; 391 struct empb_softc *sc; 392 int s; 393 394 sc = pc->cookie; 395 396 pci_decompose_tag(pc, tag, &bus, &dev, &func); 397 398 PCI_CONF_LOCK(s); 399 400 empb_switch_bridge(sc, BRIDGE_CONF); 401 402 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah, 403 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg, val); 404 #ifdef EMPB_DEBUG_CONF 405 aprint_normal("empb conf write va: %lx, bus: %d, dev: %d, " 406 "func: %d, reg: %d -w-> data %x\n", 407 pc->pci_conf_datah, bus, dev, func, reg, val); 408 #endif /* EMPB_DEBUG_CONF */ 409 empb_switch_bridge(sc, BRIDGE_IO); 410 411 PCI_CONF_UNLOCK(s); 412 } 413 414 int 415 empb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 416 { 417 return 6; /* no Mediator with more than 6 slots? */ 418 } 419 420 void 421 empb_pci_attach_hook(device_t parent, device_t self, 422 struct pcibus_attach_args *pba) 423 { 424 } 425 426 int 427 empb_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 428 { 429 /* TODO: add sanity checking */ 430 431 *ihp = EMPB_INT; 432 return 0; 433 } 434 435 const struct evcnt * 436 empb_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 437 { 438 /* TODO: implement */ 439 return NULL; 440 } 441 442 int 443 empb_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, 444 pcireg_t id) 445 { 446 447 /* 448 * Register information about some known PCI devices with 449 * DMA-able memory. 450 */ 451 /*if ((PCI_VENDOR(id) == PCI_VENDOR_3DFX) && 452 (PCI_PRODUCT(id) >= PCI_PRODUCT_3DFX_VOODOO3))*/ 453 454 455 return PCI_CONF_DEFAULT; 456 } 457
Indexes created Tue Sep 30 20:09:53 GMT 2025