empb.c revision 1.3
1 /* $NetBSD: empb.c,v 1.3 2012/06/01 09:41:35 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 74 pcireg_t empb_pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 75 void empb_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t); 76 int empb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno); 77 void empb_pci_attach_hook(struct device *parent, 78 struct device *self, struct pcibus_attach_args *pba); 79 pcitag_t empb_pci_make_tag(pci_chipset_tag_t pc, int bus, int device, 80 int function); 81 void empb_pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, 82 int *bp, int *dp, int *fp); 83 int empb_pci_intr_map(const struct pci_attach_args *pa, 84 pci_intr_handle_t *ihp); 85 const struct evcnt * empb_pci_intr_evcnt(pci_chipset_tag_t pc, 86 pci_intr_handle_t ih); 87 88 CFATTACH_DECL_NEW(empb, sizeof(struct empb_softc), 89 empb_match, empb_attach, NULL, NULL); 90 91 static int 92 empb_match(device_t parent, cfdata_t cf, void *aux) 93 { 94 struct zbus_args *zap; 95 96 zap = aux; 97 98 if (zap->manid != ZORRO_MANID_ELBOX) 99 return 0; 100 101 switch (zap->prodid) { 102 case ZORRO_PRODID_MED1K2: 103 case ZORRO_PRODID_MED1K2SX: 104 case ZORRO_PRODID_MED1K2LT2: 105 case ZORRO_PRODID_MED1K2LT4: 106 case ZORRO_PRODID_MED1K2TX: 107 return 1; 108 } 109 110 return 0; 111 } 112 113 114 static void 115 empb_attach(device_t parent, device_t self, void *aux) 116 { 117 struct empb_softc *sc; 118 struct zbus_args *zap; 119 120 volatile char *ba; 121 122 zap = aux; 123 sc = device_private(self); 124 sc->sc_dev = self; 125 ba = zap->va; 126 127 switch (zap->prodid) { 128 case ZORRO_PRODID_MED1K2: 129 aprint_normal(": ELBOX Mediator PCI 1200\n"); 130 break; 131 case ZORRO_PRODID_MED1K2SX: 132 aprint_normal(": ELBOX Mediator PCI 1200 SX\n"); 133 break; 134 case ZORRO_PRODID_MED1K2LT2: 135 aprint_normal(": ELBOX Mediator PCI 1200 LT2\n"); 136 break; 137 case ZORRO_PRODID_MED1K2LT4: 138 aprint_normal(": ELBOX Mediator PCI 1200 LT4\n"); 139 break; 140 case ZORRO_PRODID_MED1K2TX: 141 aprint_normal(": ELBOX Mediator PCI 1200 TX\n"); 142 break; 143 default: 144 aprint_normal(": ELBOX Mediator PCI (unknown)\n"); 145 break; 146 } 147 148 /* Setup bus space mappings. */ 149 sc->pci_confio_area.base = (bus_addr_t) ba + EMPB_BRIDGE_OFF; 150 sc->pci_confio_area.absm = &amiga_bus_stride_1swap; 151 152 sc->setup_area.base = (bus_addr_t) ba + EMPB_SETUP_OFF; 153 sc->setup_area.absm = &amiga_bus_stride_1; 154 155 /* 156 * Defer everything until later, we need to wait for possible 157 * emmem attachments. 158 */ 159 160 config_defer(self, empb_callback); 161 } 162 163 static void 164 empb_callback(device_t self) { 165 166 struct empb_softc *sc; 167 pci_chipset_tag_t pc; 168 struct pcibus_attach_args pba; 169 170 sc = device_private(self); 171 pc = &sc->apc; 172 173 #ifdef EMPB_DEBUG 174 aprint_normal("empb: mapped setup %x->%x, conf/io %x->%x\n", 175 kvtop((void*) sc->setup_area.base), sc->setup_area.base, 176 kvtop((void*) sc->pci_confio_area.base), sc->pci_confio_area.base); 177 #endif 178 179 sc->pci_confio_t = &(sc->pci_confio_area); 180 181 if (bus_space_map(sc->pci_confio_t, 0, EMPB_BRIDGE_SIZE, 0, 182 &sc->pci_confio_h)) 183 aprint_error_dev(self, 184 "couldn't map PCI configuration & I/O space\n"); 185 186 sc->apc.pci_conf_datat = sc->pci_confio_t; 187 sc->apc.pci_conf_datah = sc->pci_confio_h; 188 189 sc->setup_area_t = &(sc->setup_area); 190 191 if (bus_space_map(sc->setup_area_t, 0, EMPB_SETUP_SIZE, 0, 192 &sc->setup_area_h)) 193 aprint_error_dev(self, 194 "couldn't map Mediator setup space\n"); 195 196 empb_find_mem(sc); 197 if (sc->pci_mem_win_size == 0) 198 aprint_error_dev(self, 199 "couldn't find memory space, check your WINDOW jumper\n"); 200 201 /* just a test */ 202 empb_switch_window(sc, 0x80000000); 203 empb_switch_window(sc, 0x82F00000); 204 empb_switch_window(sc, 0x82000000); 205 206 /* Initialize the PCI chipset tag. */ 207 sc->apc.pc_conf_v = (void*) pc; 208 sc->apc.pc_bus_maxdevs = empb_pci_bus_maxdevs; 209 sc->apc.pc_make_tag = amiga_pci_make_tag; 210 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag; 211 sc->apc.pc_conf_read = empb_pci_conf_read; 212 sc->apc.pc_conf_write = empb_pci_conf_write; 213 sc->apc.pc_attach_hook = empb_pci_attach_hook; 214 215 sc->apc.pc_intr_map = empb_pci_intr_map; 216 sc->apc.pc_intr_string = amiga_pci_intr_string; 217 sc->apc.pc_intr_establish = amiga_pci_intr_establish; 218 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish; 219 220 sc->apc.pc_conf_hook = amiga_pci_conf_hook; 221 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt; 222 223 sc->apc.cookie = sc; 224 225 pba.pba_iot = &(sc->pci_confio_area); 226 pba.pba_dmat = NULL; 227 pba.pba_dmat64 = NULL; 228 pba.pba_pc = pc; 229 pba.pba_flags = PCI_FLAGS_IO_OKAY; 230 231 if(sc->pci_mem_win_size > 0) { 232 pba.pba_memt = &(sc->pci_mem_win); 233 pba.pba_flags |= PCI_FLAGS_MEM_OKAY; 234 } else 235 pba.pba_memt = NULL; 236 237 pba.pba_bus = 0; 238 pba.pba_bridgetag = NULL; 239 240 config_found_ia(self, "pcibus", &pba, pcibusprint); 241 } 242 243 /* 244 * Switch between configuration space and I/O space. 245 */ 246 static void 247 empb_switch_bridge(struct empb_softc *sc, uint8_t mode) 248 { 249 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 250 EMPB_SETUP_BRIDGE_OFF, mode); 251 } 252 253 254 /* 255 * Try to find a (optional) memory window board. 256 */ 257 static void 258 empb_find_mem(struct empb_softc *sc) 259 { 260 device_t memdev; 261 struct emmem_softc *mem_sc; 262 263 memdev = device_find_by_xname("emmem0"); 264 sc->pci_mem_win_size = 0; 265 266 if(memdev == NULL) { 267 return; 268 } 269 270 mem_sc = device_private(memdev); 271 272 sc->pci_mem_win.base = (bus_addr_t) mem_sc->sc_base; 273 sc->pci_mem_win.absm = &amiga_bus_stride_1; 274 275 sc->pci_mem_win_size = mem_sc->sc_size; 276 277 if(sc->pci_mem_win_size == 8*1024*1024) 278 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_8M; 279 else if(sc->pci_mem_win_size == 4*1024*1024) 280 sc->pci_mem_win_mask = EMPB_WINDOW_MASK_4M; 281 else /* disable anyway */ 282 sc->pci_mem_win_size = 0; 283 284 #ifdef EMPB_DEBUG 285 aprint_normal("empb: found %x b window at %p, switch mask %x\n", 286 sc->pci_mem_win_size, (void*) sc->pci_mem_win.base, 287 sc->pci_mem_win_mask); 288 #endif /* EMPB_DEBUG */ 289 290 } 291 292 /* 293 * Switch memory window position. 294 */ 295 void 296 empb_switch_window(struct empb_softc *sc, bus_addr_t address) 297 { 298 int s; 299 uint16_t win_reg; 300 301 WINDOW_LOCK(s); 302 303 win_reg = bswap16((address >> EMPB_WINDOW_SHIFT) 304 & sc->pci_mem_win_mask); 305 306 #ifdef EMPB_DEBUG 307 aprint_normal("empb: access to %p window switch to %x (@%p)\n", 308 (void*) address, win_reg, (void*) sc->setup_area_h); 309 #endif /* EMPB_DEBUG */ 310 311 bus_space_write_2(sc->setup_area_t, sc->setup_area_h, 312 EMPB_SETUP_WINDOW_OFF, win_reg); 313 314 /* store window pos, like: sc->pci_mem_win_pos = win_reg ? */ 315 316 win_reg = bus_space_read_2(sc->setup_area_t, sc->setup_area_h, 317 EMPB_SETUP_WINDOW_OFF); 318 319 WINDOW_UNLOCK(s); 320 321 #ifdef EMPB_DEBUG 322 aprint_normal("empb: window reg now %x\n", win_reg); 323 #endif /* EMPB_DEBUG */ 324 } 325 326 327 pcireg_t 328 empb_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 329 { 330 uint32_t data; 331 uint32_t bus, dev, func; 332 struct empb_softc *sc; 333 int s; 334 335 sc = pc->cookie; 336 337 pci_decompose_tag(pc, tag, &bus, &dev, &func); 338 339 PCI_CONF_LOCK(s); 340 341 empb_switch_bridge(sc, BRIDGE_CONF); 342 343 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah, 344 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg); 345 #ifdef EMPB_DEBUG_CONF 346 aprint_normal("empb conf read va: %lx, bus: %d, dev: %d, " 347 "func: %d, reg: %d -r-> data %x\n", 348 pc->pci_conf_datah, bus, dev, func, reg, data); 349 #endif /* EMPB_DEBUG_CONF */ 350 351 empb_switch_bridge(sc, BRIDGE_IO); 352 353 PCI_CONF_UNLOCK(s); 354 355 return data; 356 } 357 358 void 359 empb_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val) 360 { 361 uint32_t bus, dev, func; 362 struct empb_softc *sc; 363 int s; 364 365 sc = pc->cookie; 366 367 pci_decompose_tag(pc, tag, &bus, &dev, &func); 368 369 PCI_CONF_LOCK(s); 370 371 empb_switch_bridge(sc, BRIDGE_CONF); 372 373 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah, 374 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg, val); 375 #ifdef EMPB_DEBUG_CONF 376 aprint_normal("empb conf write va: %lx, bus: %d, dev: %d, " 377 "func: %d, reg: %d -w-> data %x\n", 378 pc->pci_conf_datah, bus, dev, func, reg, val); 379 #endif /* EMPB_DEBUG_CONF */ 380 empb_switch_bridge(sc, BRIDGE_IO); 381 382 PCI_CONF_UNLOCK(s); 383 } 384 385 int 386 empb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 387 { 388 return 6; /* no Mediator with more than 6 slots? */ 389 } 390 391 void 392 empb_pci_attach_hook(struct device *parent, struct device *self, 393 struct pcibus_attach_args *pba) 394 { 395 } 396 397 int 398 empb_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 399 { 400 /* TODO: add sanity checking */ 401 402 *ihp = EMPB_INT; 403 return 0; 404 } 405 406 const struct evcnt * 407 empb_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 408 { 409 /* TODO: implement */ 410 return NULL; 411 } 412 413
Indexes created Tue Sep 30 20:09:53 GMT 2025