1 /* $NetBSD: admpci.c,v 1.2 2009/10/19 23:19:38 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 David Young. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or 7 * without modification, are permitted provided that the following 8 * conditions are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following 13 * disclaimer in the documentation and/or other materials provided 14 * with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 18 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 19 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 27 * OF SUCH DAMAGE. 28 */ 29 /*- 30 * Copyright (c) 2006 Itronix Inc. 31 * All rights reserved. 32 * 33 * Written by Garrett D'Amore for Itronix Inc. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. The name of Itronix Inc. may not be used to endorse 44 * or promote products derived from this software without specific 45 * prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 49 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 50 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 51 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 52 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 53 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 54 * ON ANY THEORY OF LIABILITY, WHETHER IN 55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 57 * POSSIBILITY OF SUCH DAMAGE. 58 */ 59 60 #include "opt_pci.h" 61 #include "pci.h" 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: admpci.c,v 1.2 2009/10/19 23:19:38 rmind Exp $"); 65 66 #include <sys/types.h> 67 #include <sys/param.h> 68 #include <sys/time.h> 69 #include <sys/systm.h> 70 #include <sys/errno.h> 71 #include <sys/device.h> 72 #include <sys/malloc.h> 73 #include <sys/extent.h> 74 75 #include <uvm/uvm_extern.h> 76 77 #include <machine/bus.h> 78 #include <machine/cpu.h> 79 #include <machine/pte.h> 80 81 #include <dev/pci/pcivar.h> 82 #include <dev/pci/pcireg.h> 83 #include <dev/pci/pciconf.h> 84 85 #ifdef PCI_NETBSD_CONFIGURE 86 #include <mips/cache.h> 87 #endif 88 89 #include <mips/adm5120/include/adm5120_mainbusvar.h> 90 #include <mips/adm5120/include/adm5120reg.h> 91 #include <mips/adm5120/include/adm5120var.h> 92 93 #ifdef ADMPCI_DEBUG 94 int admpci_debug = 1; 95 #define ADMPCI_DPRINTF(__fmt, ...) \ 96 do { \ 97 if (admpci_debug) \ 98 printf((__fmt), __VA_ARGS__); \ 99 } while (/*CONSTCOND*/0) 100 #else /* !ADMPCI_DEBUG */ 101 #define ADMPCI_DPRINTF(__fmt, ...) do { } while (/*CONSTCOND*/0) 102 #endif /* ADMPCI_DEBUG */ 103 104 #define ADMPCI_TAG_BUS_MASK __BITS(23, 16) 105 /* Bit 11 is reserved. It selects the AHB-PCI bridge. Let device 0 106 * be the bridge. For all other device numbers, let bit[11] == 0. 107 */ 108 #define ADMPCI_TAG_DEVICE_MASK __BITS(15, 11) 109 #define ADMPCI_TAG_DEVICE_SUBMASK __BITS(15, 12) 110 #define ADMPCI_TAG_DEVICE_BRIDGE __BIT(11) 111 #define ADMPCI_TAG_FUNCTION_MASK __BITS(10, 8) 112 #define ADMPCI_TAG_REGISTER_MASK __BITS(7, 0) 113 114 #define ADMPCI_MAX_DEVICE 115 116 struct admpci_softc { 117 struct device sc_dev; 118 struct mips_pci_chipset sc_pc; 119 120 bus_space_tag_t sc_memt; 121 bus_space_tag_t sc_iot; 122 123 bus_space_tag_t sc_conft; 124 bus_space_handle_t sc_addrh; 125 bus_space_handle_t sc_datah; 126 }; 127 128 int admpcimatch(struct device *, struct cfdata *, void *); 129 void admpciattach(struct device *, struct device *, void *); 130 131 #if NPCI > 0 132 static void admpci_attach_hook(struct device *, struct device *, 133 struct pcibus_attach_args *); 134 static int admpci_bus_maxdevs(void *, int); 135 static pcitag_t admpci_make_tag(void *, int, int, int); 136 static void admpci_decompose_tag(void *, pcitag_t, int *, int *, int *); 137 static pcireg_t admpci_conf_read(void *, pcitag_t, int); 138 static void admpci_conf_write(void *, pcitag_t, int, pcireg_t); 139 static const char *admpci_intr_string(void *, pci_intr_handle_t); 140 static void admpci_conf_interrupt(void *, int, int, int, int, int *); 141 static void *admpci_intr_establish(void *, pci_intr_handle_t, int, 142 int (*)(void *), void *); 143 static void admpci_intr_disestablish(void *, void *); 144 static int admpci_intr_map(struct pci_attach_args *, pci_intr_handle_t *); 145 146 #ifdef PCI_NETBSD_CONFIGURE 147 static struct extent *io_ex = NULL; 148 static struct extent *mem_ex = NULL; 149 #endif /* PCI_NETBSD_CONFIGURE */ 150 151 #endif /* NPCI > 0 */ 152 153 CFATTACH_DECL(admpci, sizeof(struct admpci_softc), 154 admpcimatch, admpciattach, NULL, NULL); 155 156 int admpci_found = 0; 157 158 /* 159 * Physical PCI addresses are 36-bits long, so we need to have 160 * adequate storage space for them. 161 */ 162 #if NPCI > 0 163 #if !defined(_MIPS_PADDR_T_64BIT) && !defined(_LP64) 164 #error "admpci requires 64 bit paddr_t!" 165 #endif 166 #endif 167 168 int 169 admpcimatch(struct device *parent, struct cfdata *match, void *aux) 170 { 171 struct mainbus_attach_args *ma = (struct mainbus_attach_args *)aux; 172 173 return !admpci_found && strcmp(ma->ma_name, "admpci") == 0; 174 } 175 176 void 177 admpciattach(struct device *parent, struct device *self, void *aux) 178 { 179 struct adm5120_config *admc = &adm5120_configuration; 180 struct admpci_softc *sc = (struct admpci_softc *)self; 181 struct mainbus_attach_args *ma = (struct mainbus_attach_args *)aux; 182 #if NPCI > 0 183 u_long result; 184 pcitag_t tag; 185 struct pcibus_attach_args pba; 186 #endif 187 188 admpci_found = 1; 189 190 sc->sc_conft = ma->ma_obiot; 191 if (bus_space_map(sc->sc_conft, ADM5120_BASE_PCI_CONFDATA, 4, 0, 192 &sc->sc_datah) != 0) { 193 printf( 194 "\n%s: unable to map PCI Configuration Data register\n", 195 device_xname(&sc->sc_dev)); 196 return; 197 } 198 if (bus_space_map(sc->sc_conft, ADM5120_BASE_PCI_CONFADDR, 4, 0, 199 &sc->sc_addrh) != 0) { 200 printf( 201 "\n%s: unable to map PCI Configuration Address register\n", 202 device_xname(&sc->sc_dev)); 203 return; 204 } 205 206 printf(": ADM5120 Host-PCI Bridge, data %lx addr %lx, sc %p\n", 207 sc->sc_datah, sc->sc_addrh, (void *)sc); 208 209 #if NPCI > 0 210 sc->sc_memt = &admc->pcimem_space; 211 sc->sc_iot = &admc->pciio_space; 212 213 sc->sc_pc.pc_conf_v = sc; 214 sc->sc_pc.pc_attach_hook = admpci_attach_hook; 215 sc->sc_pc.pc_bus_maxdevs = admpci_bus_maxdevs; 216 sc->sc_pc.pc_make_tag = admpci_make_tag; 217 sc->sc_pc.pc_decompose_tag = admpci_decompose_tag; 218 sc->sc_pc.pc_conf_read = admpci_conf_read; 219 sc->sc_pc.pc_conf_write = admpci_conf_write; 220 221 sc->sc_pc.pc_intr_v = sc; 222 sc->sc_pc.pc_intr_map = admpci_intr_map; 223 sc->sc_pc.pc_intr_string = admpci_intr_string; 224 sc->sc_pc.pc_intr_establish = admpci_intr_establish; 225 sc->sc_pc.pc_intr_disestablish = admpci_intr_disestablish; 226 sc->sc_pc.pc_conf_interrupt = admpci_conf_interrupt; 227 228 tag = pci_make_tag(&sc->sc_pc, 0, 0, 0); 229 ADMPCI_DPRINTF("%s: BAR 0x10 0x%08x\n", __func__, 230 pci_conf_read(&sc->sc_pc, tag, PCI_MAPREG_START)); 231 232 #ifdef PCI_NETBSD_CONFIGURE 233 mem_ex = extent_create("pcimem", 234 ADM5120_BOTTOM, ADM5120_TOP, 235 M_DEVBUF, NULL, 0, EX_WAITOK); 236 (void)extent_alloc_subregion(mem_ex, 237 ADM5120_BASE_SRAM1, ADM5120_BASE_PCI_MEM - 1, 238 ADM5120_BASE_PCI_MEM - ADM5120_BASE_SRAM1, 239 ADM5120_BASE_PCI_MEM - ADM5120_BASE_SRAM1, 240 0, EX_WAITOK, &result); 241 (void)extent_alloc_subregion(mem_ex, 242 ADM5120_BASE_PCI_IO, ADM5120_TOP, 243 ADM5120_TOP - ADM5120_BASE_PCI_IO + 1, 244 ADM5120_TOP - ADM5120_BASE_PCI_IO + 1, 245 0, EX_WAITOK, &result); 246 247 io_ex = extent_create("pciio", 248 ADM5120_BASE_PCI_IO, ADM5120_BASE_PCI_CONFADDR - 1, 249 M_DEVBUF, NULL, 0, EX_WAITOK); 250 251 pci_configure_bus(&sc->sc_pc, 252 io_ex, mem_ex, NULL, 0, mips_dcache_align); 253 extent_destroy(mem_ex); 254 extent_destroy(io_ex); 255 #endif 256 257 pba.pba_iot = sc->sc_iot; 258 pba.pba_memt = sc->sc_memt; 259 /* XXX: review dma tag logic */ 260 pba.pba_dmat = ma->ma_dmat; 261 pba.pba_dmat64 = NULL; 262 pba.pba_pc = &sc->sc_pc; 263 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; 264 pba.pba_bus = 0; 265 pba.pba_bridgetag = NULL; 266 267 config_found_ia(self, "pcibus", &pba, pcibusprint); 268 #endif /* NPCI > 0 */ 269 } 270 271 #if NPCI > 0 272 273 void 274 admpci_attach_hook(struct device *parent, struct device *self, 275 struct pcibus_attach_args *pba) 276 { 277 } 278 279 /* There are at most four devices on bus 0. The ADM5120 has 280 * request/grant lines for 3 PCI devices: 1, 2, and 3. The host 281 * bridge is device 0. 282 */ 283 int 284 admpci_bus_maxdevs(void *v, int bus) 285 { 286 if (bus == 0) 287 return 4; 288 289 return 1 + __SHIFTOUT_MASK(ADMPCI_TAG_DEVICE_MASK); 290 } 291 292 pcitag_t 293 admpci_make_tag(void *v, int bus, int device, int function) 294 { 295 if (bus > __SHIFTOUT_MASK(ADMPCI_TAG_BUS_MASK) || 296 device > __SHIFTOUT_MASK(ADMPCI_TAG_DEVICE_MASK) || 297 function > __SHIFTOUT_MASK(ADMPCI_TAG_FUNCTION_MASK)) 298 panic("%s: bad request", __func__); 299 300 return __SHIFTIN(bus, ADMPCI_TAG_BUS_MASK) | 301 __SHIFTIN(device, ADMPCI_TAG_DEVICE_MASK) | 302 __SHIFTIN(function, ADMPCI_TAG_FUNCTION_MASK); 303 } 304 305 void 306 admpci_decompose_tag(void *v, pcitag_t tag, int *b, int *d, int *f) 307 { 308 int bus, device, function; 309 310 bus = __SHIFTOUT(tag, ADMPCI_TAG_BUS_MASK); 311 device = __SHIFTOUT(tag, ADMPCI_TAG_DEVICE_MASK); 312 function = __SHIFTOUT(tag, ADMPCI_TAG_FUNCTION_MASK); 313 314 if (b != NULL) 315 *b = bus; 316 if (d != NULL) 317 *d = device; 318 if (f != NULL) 319 *f = function; 320 } 321 322 static int 323 admpci_tag_to_addr(void *v, pcitag_t tag, int reg, bus_addr_t *addrp) 324 { 325 int bus, device, function; 326 327 KASSERT(addrp != NULL); 328 /* panics if tag is not well-formed */ 329 admpci_decompose_tag(v, tag, &bus, &device, &function); 330 if (reg > __SHIFTOUT_MASK(ADMPCI_TAG_REGISTER_MASK)) 331 panic("%s: bad register", __func__); 332 333 *addrp = 0x80000000 | tag | __SHIFTIN(reg, ADMPCI_TAG_REGISTER_MASK); 334 335 return 0; 336 } 337 338 static pcireg_t 339 admpci_conf_read(void *v, pcitag_t tag, int reg) 340 { 341 int s; 342 struct admpci_softc *sc = (struct admpci_softc *)v; 343 uint32_t data; 344 bus_addr_t addr; 345 346 ADMPCI_DPRINTF("%s: sc %p tag %lx reg %d\n", __func__, (void *)sc, tag, 347 reg); 348 349 if (admpci_tag_to_addr(v, tag, reg, &addr) == -1) 350 return 0xffffffff; 351 352 ADMPCI_DPRINTF("%s: sc_addrh %lx sc_datah %lx addr %lx\n", __func__, 353 sc->sc_addrh, sc->sc_datah, addr); 354 355 s = splhigh(); 356 bus_space_write_4(sc->sc_conft, sc->sc_addrh, 0, addr); 357 data = bus_space_read_4(sc->sc_conft, sc->sc_datah, 0); 358 splx(s); 359 360 ADMPCI_DPRINTF("%s: read 0x%" PRIx32 "\n", __func__, data); 361 return data; 362 } 363 364 void 365 admpci_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data) 366 { 367 int s; 368 struct admpci_softc *sc = (struct admpci_softc *)v; 369 bus_addr_t addr; 370 371 ADMPCI_DPRINTF("%s: sc %p tag %lx reg %d\n", __func__, (void *)sc, tag, 372 reg); 373 374 if (admpci_tag_to_addr(v, tag, reg, &addr) == -1) 375 return; 376 377 ADMPCI_DPRINTF("%s: sc_addrh %lx sc_datah %lx addr %lx\n", __func__, 378 sc->sc_addrh, sc->sc_datah, addr); 379 380 s = splhigh(); 381 bus_space_write_4(sc->sc_conft, sc->sc_addrh, 0, addr); 382 bus_space_write_4(sc->sc_conft, sc->sc_datah, 0, data); 383 splx(s); 384 } 385 386 const char * 387 admpci_intr_string(void *v, pci_intr_handle_t ih) 388 { 389 static char name[16]; 390 391 (void)snprintf(name, sizeof(name), "irq %u", (unsigned)ih); 392 return name; 393 } 394 395 void * 396 admpci_intr_establish(void *v, pci_intr_handle_t ih, int ipl, 397 int (*handler)(void *), void *arg) 398 { 399 return adm5120_intr_establish(ih, ipl, handler, arg); 400 } 401 402 void 403 admpci_intr_disestablish(void *v, void *cookie) 404 { 405 adm5120_intr_disestablish(cookie); 406 } 407 408 void 409 admpci_conf_interrupt(void *v, int bus, int dev, int ipin, int swiz, int *iline) 410 { 411 /* 412 * We let the machdep_pci_intr_map take care of IRQ routing. 413 * On some platforms the BIOS may have handled this properly, 414 * on others it might not have. For now we avoid clobbering 415 * the settings establishsed by the BIOS, so that they will be 416 * there if the platform logic is confident that it can rely 417 * on them. 418 */ 419 } 420 421 /* 422 * Map the bus 0 device numbers 1, 2, and 3 to IRQ 6, 7, and 8, 423 * respectively. 424 * 425 * XXX How to handle bridges? 426 */ 427 static int 428 admpci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) 429 { 430 int bus, device, function; 431 432 admpci_decompose_tag(pa->pa_pc->pc_conf_v, pa->pa_tag, 433 &bus, &device, &function); 434 435 if (bus != 0 || device > 3) 436 return -1; 437 438 *ihp = (device - 1) + 6; 439 440 return 0; 441 } 442 #endif 443