empb.c revision 1.5
1 /* $NetBSD: empb.c,v 1.5 2012/06/04 12:56:48 rkujawa 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(struct device *, struct cfdata *, void *); 67 static void empb_attach(struct device *, struct device *, void *); 68 69 static void empb_callback(device_t self); 70 71 static void empb_find_mem(struct empb_softc *sc); 72 static void empb_switch_bridge(struct empb_softc *sc, uint8_t mode); 73 static void empb_intr_enable(struct empb_softc *sc); 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 pc, int busno); 78 void empb_pci_attach_hook(struct device *parent, 79 struct device *self, struct pcibus_attach_args *pba); 80 pcitag_t empb_pci_make_tag(pci_chipset_tag_t pc, int bus, int device, 81 int function); 82 void empb_pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, 83 int *bp, int *dp, int *fp); 84 int empb_pci_intr_map(const struct pci_attach_args *pa, 85 pci_intr_handle_t *ihp); 86 const struct evcnt * empb_pci_intr_evcnt(pci_chipset_tag_t pc, 87 pci_intr_handle_t ih); 88 int empb_pci_conf_hook(pci_chipset_tag_t pct, int bus, 89 int dev, int func, pcireg_t id); 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 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 switch (zap->prodid) { 131 case ZORRO_PRODID_MED1K2: 132 aprint_normal(": ELBOX Mediator PCI 1200\n"); 133 break; 134 case ZORRO_PRODID_MED1K2SX: 135 aprint_normal(": ELBOX Mediator PCI 1200 SX\n"); 136 break; 137 case ZORRO_PRODID_MED1K2LT2: 138 aprint_normal(": ELBOX Mediator PCI 1200 LT2\n"); 139 break; 140 case ZORRO_PRODID_MED1K2LT4: 141 aprint_normal(": ELBOX Mediator PCI 1200 LT4\n"); 142 break; 143 case ZORRO_PRODID_MED1K2TX: 144 aprint_normal(": ELBOX Mediator PCI 1200 TX\n"); 145 break; 146 default: 147 aprint_normal(": ELBOX Mediator PCI (unknown)\n"); 148 break; 149 } 150 151 /* Setup bus space mappings. */ 152 sc->pci_confio_area.base = (bus_addr_t) ba + EMPB_BRIDGE_OFF; 153 sc->pci_confio_area.absm = &amiga_bus_stride_1swap; 154 155 sc->setup_area.base = (bus_addr_t) ba + EMPB_SETUP_OFF; 156 sc->setup_area.absm = &amiga_bus_stride_1; 157 158 /* 159 * Defer everything until later, we need to wait for possible 160 * emmem attachments. 161 */ 162 163 config_defer(self, empb_callback); 164 } 165 166 static void 167 empb_callback(device_t self) { 168 169 struct empb_softc *sc; 170 pci_chipset_tag_t pc; 171 struct pcibus_attach_args pba; 172 #ifdef PCI_NETBSD_CONFIGURE 173 struct extent *ioext, *memext; 174 #endif /* PCI_NETBSD_CONFIGURE */ 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 /* just a test */ 213 empb_switch_window(sc, 0x80000000); 214 empb_switch_window(sc, 0x82F00000); 215 empb_switch_window(sc, 0x82000000); 216 217 /* Initialize the PCI chipset tag. */ 218 sc->apc.pc_conf_v = (void*) pc; 219 sc->apc.pc_bus_maxdevs = empb_pci_bus_maxdevs; 220 sc->apc.pc_make_tag = amiga_pci_make_tag; 221 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag; 222 sc->apc.pc_conf_read = empb_pci_conf_read; 223 sc->apc.pc_conf_write = empb_pci_conf_write; 224 sc->apc.pc_attach_hook = empb_pci_attach_hook; 225 226 sc->apc.pc_intr_map = empb_pci_intr_map; 227 sc->apc.pc_intr_string = amiga_pci_intr_string; 228 sc->apc.pc_intr_establish = amiga_pci_intr_establish; 229 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish; 230 231 sc->apc.pc_conf_hook = empb_pci_conf_hook; 232 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt; 233 234 sc->apc.cookie = sc; 235 236 #ifdef PCI_NETBSD_CONFIGURE 237 ioext = extent_create("empbio", 0, EMPB_BRIDGE_SIZE, 238 NULL, 0, EX_NOWAIT); 239 240 memext = extent_create("empbmem", EMPB_MEM_BASE, EMPB_MEM_END, 241 NULL, 0, EX_NOWAIT); 242 243 pci_configure_bus(pc, ioext, memext, NULL, 0, CACHELINE_SIZE); 244 245 extent_destroy(ioext); 246 extent_destroy(memext); 247 248 #endif /* PCI_NETBSD_CONFIGURE */ 249 250 pba.pba_iot = &(sc->pci_confio_area); 251 pba.pba_dmat = NULL; 252 pba.pba_dmat64 = NULL; 253 pba.pba_pc = pc; 254 pba.pba_flags = PCI_FLAGS_IO_OKAY; 255 256 if(sc->pci_mem_win_size > 0) { 257 pba.pba_memt = &(sc->pci_mem_win); 258 pba.pba_flags |= PCI_FLAGS_MEM_OKAY; 259 } else 260 pba.pba_memt = NULL; 261 262 pba.pba_bus = 0; 263 pba.pba_bridgetag = NULL; 264 265 empb_intr_enable(sc); 266 267 config_found_ia(self, "pcibus", &pba, pcibusprint); 268 } 269 270 static void 271 empb_intr_enable(struct empb_softc *sc) 272 { 273 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 274 EMPB_SETUP_INTR_OFF, EMPB_INTR_ENABLE); 275 } 276 277 /* 278 * Switch between configuration space and I/O space. 279 */ 280 static void 281 empb_switch_bridge(struct empb_softc *sc, uint8_t mode) 282 { 283 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 284 EMPB_SETUP_BRIDGE_OFF, mode); 285 } 286 287 288 /* 289 * Try to find a (optional) memory window board. 290 */ 291 static void 292 empb_find_mem(struct empb_softc *sc) 293 { 294 device_t memdev; 295 struct emmem_softc *mem_sc; 296 297 memdev = device_find_by_xname("emmem0"); 298 sc->pci_mem_win_size = 0; 299 300 if(memdev == NULL) { 301 return; 302 } 303 304 mem_sc = device_private(memdev); 305 306 sc->pci_mem_win.base = (bus_addr_t) mem_sc->sc_base; 307 sc->pci_mem_win.absm = &empb_bus_swap; 308 sc->pci_mem_win_size = mem_sc->sc_size; 309 sc->pci_mem_win_t = &sc->pci_mem_win; 310 311 if(sc->pci_mem_win_size == 8*1024*1024) 312 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_8M; 313 else if(sc->pci_mem_win_size == 4*1024*1024) 314 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_4M; 315 else /* disable anyway */ 316 sc->pci_mem_win_size = 0; 317 318 #ifdef EMPB_DEBUG 319 aprint_normal("empb: found %x b window at %p, switch mask %x\n", 320 sc->pci_mem_win_size, (void*) sc->pci_mem_win.base, 321 sc->pci_mem_win_mask); 322 #endif /* EMPB_DEBUG */ 323 324 } 325 326 /* 327 * Switch memory window position. Return PCI mem address seen at the beginning 328 * of window. 329 */ 330 bus_addr_t 331 empb_switch_window(struct empb_softc *sc, bus_addr_t address) 332 { 333 int s; 334 uint16_t win_reg; 335 #ifdef EMPB_DEBUG 336 uint16_t rwin_reg; 337 #endif /* EMPB_DEBUG */ 338 339 WINDOW_LOCK(s); 340 341 win_reg = bswap16((address >> EMPB_WINDOW_SHIFT) 342 & sc->pci_mem_win_mask); 343 344 bus_space_write_2(sc->setup_area_t, sc->setup_area_h, 345 EMPB_SETUP_WINDOW_OFF, win_reg); 346 347 /* store window pos, like: sc->pci_mem_win_pos = win_reg ? */ 348 349 #ifdef EMPB_DEBUG 350 rwin_reg = bus_space_read_2(sc->setup_area_t, sc->setup_area_h, 351 EMPB_SETUP_WINDOW_OFF); 352 353 aprint_normal("empb: access to %p window switch to %x => reg now %x\n", 354 (void*) address, win_reg, rwin_reg); 355 #endif /* EMPB_DEBUG */ 356 357 WINDOW_UNLOCK(s); 358 359 return (bus_addr_t)((bswap16(win_reg)) << EMPB_WINDOW_SHIFT); 360 } 361 362 363 pcireg_t 364 empb_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 365 { 366 uint32_t data; 367 uint32_t bus, dev, func; 368 struct empb_softc *sc; 369 int s; 370 371 sc = pc->cookie; 372 373 pci_decompose_tag(pc, tag, &bus, &dev, &func); 374 375 PCI_CONF_LOCK(s); 376 377 empb_switch_bridge(sc, BRIDGE_CONF); 378 379 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah, 380 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg); 381 #ifdef EMPB_DEBUG_CONF 382 aprint_normal("empb conf read va: %lx, bus: %d, dev: %d, " 383 "func: %d, reg: %d -r-> data %x\n", 384 pc->pci_conf_datah, bus, dev, func, reg, data); 385 #endif /* EMPB_DEBUG_CONF */ 386 387 empb_switch_bridge(sc, BRIDGE_IO); 388 389 PCI_CONF_UNLOCK(s); 390 391 return data; 392 } 393 394 void 395 empb_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val) 396 { 397 uint32_t bus, dev, func; 398 struct empb_softc *sc; 399 int s; 400 401 sc = pc->cookie; 402 403 pci_decompose_tag(pc, tag, &bus, &dev, &func); 404 405 PCI_CONF_LOCK(s); 406 407 empb_switch_bridge(sc, BRIDGE_CONF); 408 409 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah, 410 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg, val); 411 #ifdef EMPB_DEBUG_CONF 412 aprint_normal("empb conf write va: %lx, bus: %d, dev: %d, " 413 "func: %d, reg: %d -w-> data %x\n", 414 pc->pci_conf_datah, bus, dev, func, reg, val); 415 #endif /* EMPB_DEBUG_CONF */ 416 empb_switch_bridge(sc, BRIDGE_IO); 417 418 PCI_CONF_UNLOCK(s); 419 } 420 421 int 422 empb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 423 { 424 return 6; /* no Mediator with more than 6 slots? */ 425 } 426 427 void 428 empb_pci_attach_hook(struct device *parent, struct device *self, 429 struct pcibus_attach_args *pba) 430 { 431 } 432 433 int 434 empb_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 435 { 436 /* TODO: add sanity checking */ 437 438 *ihp = EMPB_INT; 439 return 0; 440 } 441 442 const struct evcnt * 443 empb_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 444 { 445 /* TODO: implement */ 446 return NULL; 447 } 448 449 int 450 empb_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, 451 pcireg_t id) 452 { 453 454 /* 455 * Register information about some known PCI devices with 456 * DMA-able memory. 457 */ 458 /*if ((PCI_VENDOR(id) == PCI_VENDOR_3DFX) && 459 (PCI_PRODUCT(id) >= PCI_PRODUCT_3DFX_VOODOO3))*/ 460 461 462 return PCI_CONF_DEFAULT; 463 } 464
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