empb.c revision 1.1
1 /* $NetBSD: empb.c,v 1.1 2012/05/30 18:01:51 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 <m68k/bus_dma.h> 50 #include <amiga/dev/zbusvar.h> 51 #include <amiga/pci/empbreg.h> 52 #include <amiga/pci/emmemvar.h> 53 54 #include <dev/pci/pcivar.h> 55 #include <dev/pci/pcireg.h> 56 #include <dev/pci/pcidevs.h> 57 #include <dev/pci/pciconf.h> 58 59 #include "opt_pci.h" 60 61 /* #define EMPB_DEBUG 1 */ 62 63 #define PCI_CONF_LOCK(s) (s) = splhigh() 64 #define PCI_CONF_UNLOCK(s) splx((s)) 65 66 struct empb_softc { 67 device_t sc_dev; 68 69 struct bus_space_tag setup_area; 70 bus_space_tag_t setup_area_t; 71 bus_space_handle_t setup_area_h; 72 73 struct bus_space_tag pci_confio_area; 74 bus_space_tag_t pci_confio_t; 75 bus_space_handle_t pci_confio_h; 76 uint8_t pci_confio_mode; 77 78 struct bus_space_tag pci_mem_window; 79 uint32_t pci_mem_window_size; 80 81 struct amiga_pci_chipset apc; 82 83 }; 84 85 static int empb_match(struct device *, struct cfdata *, void *); 86 static void empb_attach(struct device *, struct device *, void *); 87 static void empb_callback(device_t self); 88 89 /*static bool empb_find_mem(struct empb_softc *sc);*/ 90 void empb_switch_bridge(struct empb_softc *sc, uint8_t mode); 91 92 pcireg_t empb_pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 93 void empb_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t); 94 int empb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno); 95 void empb_pci_attach_hook(struct device *parent, 96 struct device *self, struct pcibus_attach_args *pba); 97 pcitag_t empb_pci_make_tag(pci_chipset_tag_t pc, int bus, int device, 98 int function); 99 void empb_pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, 100 int *bp, int *dp, int *fp); 101 int empb_pci_intr_map(const struct pci_attach_args *pa, 102 pci_intr_handle_t *ihp); 103 const struct evcnt * empb_pci_intr_evcnt(pci_chipset_tag_t pc, 104 pci_intr_handle_t ih); 105 106 CFATTACH_DECL_NEW(empb, sizeof(struct empb_softc), 107 empb_match, empb_attach, NULL, NULL); 108 109 static int 110 empb_match(device_t parent, cfdata_t cf, void *aux) 111 { 112 struct zbus_args *zap; 113 114 zap = aux; 115 116 if (zap->manid != ZORRO_MANID_ELBOX) 117 return 0; 118 119 switch (zap->prodid) { 120 case ZORRO_PRODID_MED1K2: 121 case ZORRO_PRODID_MED1K2SX: 122 case ZORRO_PRODID_MED1K2LT2: 123 case ZORRO_PRODID_MED1K2LT4: 124 case ZORRO_PRODID_MED1K2TX: 125 return 1; 126 } 127 128 return 0; 129 } 130 131 132 static void 133 empb_attach(device_t parent, device_t self, void *aux) 134 { 135 struct empb_softc *sc; 136 struct zbus_args *zap; 137 138 volatile char *ba; 139 140 zap = aux; 141 sc = device_private(self); 142 sc->sc_dev = self; 143 ba = zap->va; 144 145 switch (zap->prodid) { 146 case ZORRO_PRODID_MED1K2: 147 aprint_normal(": ELBOX Mediator PCI 1200\n"); 148 break; 149 case ZORRO_PRODID_MED1K2SX: 150 aprint_normal(": ELBOX Mediator PCI 1200 SX\n"); 151 break; 152 case ZORRO_PRODID_MED1K2LT2: 153 aprint_normal(": ELBOX Mediator PCI 1200 LT2\n"); 154 break; 155 case ZORRO_PRODID_MED1K2LT4: 156 aprint_normal(": ELBOX Mediator PCI 1200 LT4\n"); 157 break; 158 case ZORRO_PRODID_MED1K2TX: 159 aprint_normal(": ELBOX Mediator PCI 1200 TX\n"); 160 break; 161 default: 162 aprint_normal(": ELBOX Mediator PCI (unknown)\n"); 163 break; 164 } 165 166 /* Setup bus space mappings. */ 167 sc->pci_confio_area.base = (bus_addr_t) ba + EMPB_BRIDGE_OFF; 168 sc->pci_confio_area.absm = &amiga_bus_stride_1swap; 169 170 sc->setup_area.base = (bus_addr_t) ba + EMPB_SETUP_OFF; 171 sc->setup_area.absm = &amiga_bus_stride_1; 172 173 /* 174 * Defer everything until later, we need to wait for possible 175 * emmem attachments. 176 */ 177 178 config_defer(self, empb_callback); 179 } 180 181 static void 182 empb_callback(device_t self) { 183 184 struct empb_softc *sc; 185 pci_chipset_tag_t pc; 186 struct pcibus_attach_args pba; 187 188 sc = device_private(self); 189 pc = &sc->apc; 190 191 #ifdef EMPB_DEBUG 192 aprint_normal("empb: mapped setup %x->%x, conf/io %x->%x\n", 193 kvtop((void*) sc->setup_area.base), sc->setup_area.base, 194 kvtop((void*) sc->pci_confio_area.base), sc->pci_confio_area.base); 195 #endif 196 197 sc->pci_confio_t = &(sc->pci_confio_area); 198 199 if (bus_space_map(sc->pci_confio_t, 0, EMPB_BRIDGE_SIZE, 0, 200 &sc->pci_confio_h)) 201 aprint_error_dev(self, 202 "couldn't map PCI configuration & I/O space\n"); 203 204 sc->apc.pci_conf_datat = sc->pci_confio_t; 205 sc->apc.pci_conf_datah = sc->pci_confio_h; 206 207 sc->setup_area_t = &(sc->setup_area); 208 209 if (bus_space_map(sc->setup_area_t, 0, EMPB_SETUP_SIZE, 0, 210 &sc->setup_area_h)) 211 aprint_error_dev(self, 212 "couldn't map Mediator setup space\n"); 213 214 /* Initialize the PCI chipset tag. */ 215 sc->apc.pc_conf_v = (void*) pc; 216 sc->apc.pc_bus_maxdevs = empb_pci_bus_maxdevs; 217 sc->apc.pc_make_tag = amiga_pci_make_tag; 218 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag; 219 sc->apc.pc_conf_read = empb_pci_conf_read; 220 sc->apc.pc_conf_write = empb_pci_conf_write; 221 sc->apc.pc_attach_hook = empb_pci_attach_hook; 222 223 sc->apc.pc_intr_map = empb_pci_intr_map; 224 sc->apc.pc_intr_string = amiga_pci_intr_string; 225 sc->apc.pc_intr_establish = amiga_pci_intr_establish; 226 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish; 227 228 sc->apc.pc_conf_hook = amiga_pci_conf_hook; 229 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt; 230 231 sc->apc.cookie = sc; 232 233 pba.pba_iot = &(sc->pci_confio_area); 234 pba.pba_dmat = NULL; 235 pba.pba_dmat64 = NULL; 236 pba.pba_pc = pc; 237 pba.pba_flags = PCI_FLAGS_IO_OKAY; 238 239 /*if(sc->pci_mem_window_size > 0) { 240 pba.pba_memt = &(sc->pci_mem_window); 241 pba.pba_flags |= PCI_FLAGS_MEM_OKAY; 242 } else */ 243 pba.pba_memt = NULL; 244 245 pba.pba_bus = 0; 246 pba.pba_bridgetag = NULL; 247 248 config_found_ia(self, "pcibus", &pba, pcibusprint); 249 } 250 251 /* 252 * Switch between configuration space and I/O space. 253 */ 254 void 255 empb_switch_bridge(struct empb_softc *sc, uint8_t mode) 256 { 257 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 258 EMPB_SETUP_BRIDGE_OFF, mode); 259 } 260 261 262 /* 263 * Try to find a (optional) memory window board. 264 */ 265 /*bool 266 empb_find_mem(struct empb_softc *sc) 267 { 268 device_t memdev; 269 struct emmem_softc *mem_sc; 270 271 memdev = device_find_by_xname("emmem0"); 272 273 if(memdev == NULL) 274 return false; 275 276 mem_sc = device_private(memdev); 277 278 sc->pci_mem_window.base = (bus_addr_t) mem_sc->sc_base; 279 sc->pci_mem_window.absm = &amiga_bus_stride_1; 280 281 sc->pci_mem_window_size = mem_sc->sc_size; 282 }*/ 283 284 pcireg_t 285 empb_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 286 { 287 uint32_t data; 288 uint32_t bus, dev, func; 289 struct empb_softc *sc; 290 int s; 291 292 sc = pc->cookie; 293 294 pci_decompose_tag(pc, tag, &bus, &dev, &func); 295 296 PCI_CONF_LOCK(s); 297 298 empb_switch_bridge(sc, BRIDGE_CONF); 299 300 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah, 301 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg); 302 #ifdef EMPB_DEBUG_CONF 303 aprint_normal("empb conf read va: %lx, bus: %d, dev: %d, " 304 "func: %d, reg: %d -r-> data %x\n", 305 pc->pci_conf_datah, bus, dev, func, reg, data); 306 #endif /* EMPB_DEBUG_CONF */ 307 308 empb_switch_bridge(sc, BRIDGE_IO); 309 310 PCI_CONF_UNLOCK(s); 311 312 return data; 313 } 314 315 void 316 empb_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val) 317 { 318 uint32_t bus, dev, func; 319 struct empb_softc *sc; 320 int s; 321 322 sc = pc->cookie; 323 324 pci_decompose_tag(pc, tag, &bus, &dev, &func); 325 326 PCI_CONF_LOCK(s); 327 328 empb_switch_bridge(sc, BRIDGE_CONF); 329 330 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah, 331 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg, val); 332 #ifdef EMPB_DEBUG_CONF 333 aprint_normal("empb conf write va: %lx, bus: %d, dev: %d, " 334 "func: %d, reg: %d -w-> data %x\n", 335 pc->pci_conf_datah, bus, dev, func, reg, val); 336 #endif /* EMPB_DEBUG_CONF */ 337 empb_switch_bridge(sc, BRIDGE_IO); 338 339 PCI_CONF_UNLOCK(s); 340 } 341 342 int 343 empb_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 344 { 345 return 6; /* no Mediator with more than 6 slots? */ 346 } 347 348 void 349 empb_pci_attach_hook(struct device *parent, struct device *self, 350 struct pcibus_attach_args *pba) 351 { 352 } 353 354 int 355 empb_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 356 { 357 /* TODO: add sanity checking */ 358 359 *ihp = EMPB_INT; 360 return 0; 361 } 362 363 const struct evcnt * 364 empb_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 365 { 366 /* TODO: implement */ 367 return NULL; 368 } 369 370
Indexes created Tue Sep 30 20:09:53 GMT 2025