1 /* $NetBSD: em4k.c,v 1.9 2023/12/20 00:40:42 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 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 4000 driver. */ 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/kmem.h> 41 42 #include <uvm/uvm_extern.h> 43 44 #include <machine/bus.h> 45 #include <machine/cpu.h> 46 47 #include <amiga/dev/zbusvar.h> 48 #include <amiga/pci/empbreg.h> 49 #include <amiga/pci/em4kvar.h> 50 #include <amiga/pci/emmemvar.h> 51 52 #include <dev/pci/pciconf.h> 53 54 #include "opt_pci.h" 55 56 static int em4k_match(device_t, cfdata_t, void *); 57 static void em4k_attach(device_t, device_t, void *); 58 static void em4k_callback(device_t); 59 60 static void em4k_find_mem(struct em4k_softc *); 61 static void em4k_intr_enable(struct em4k_softc *); 62 63 pcireg_t em4k_pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 64 void em4k_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t); 65 int em4k_pci_bus_maxdevs(pci_chipset_tag_t, int); 66 void em4k_pci_attach_hook(device_t, device_t, 67 struct pcibus_attach_args *); 68 pcitag_t em4k_pci_make_tag(pci_chipset_tag_t, int, int, int); 69 void em4k_pci_decompose_tag(pci_chipset_tag_t, pcitag_t, 70 int *, int *, int *); 71 int em4k_pci_intr_map(const struct pci_attach_args *, 72 pci_intr_handle_t *); 73 const struct evcnt * em4k_pci_intr_evcnt(pci_chipset_tag_t, 74 pci_intr_handle_t); 75 int em4k_pci_conf_hook(pci_chipset_tag_t, int, int, int, pcireg_t); 76 77 #ifdef PCI_NETBSD_CONFIGURE 78 static void em4k_pci_configure(struct em4k_softc *sc); 79 #endif /* PCI_NETBSD_CONFIGURE */ 80 81 CFATTACH_DECL_NEW(em4k, sizeof(struct em4k_softc), 82 em4k_match, em4k_attach, NULL, NULL); 83 84 static int 85 em4k_match(device_t parent, cfdata_t cf, void *aux) 86 { 87 struct zbus_args *zap; 88 89 zap = aux; 90 91 if (zap->manid != ZORRO_MANID_ELBOX) 92 return 0; 93 94 switch (zap->prodid) { 95 case ZORRO_PRODID_MED4K: 96 case ZORRO_PRODID_MED4KMKII: 97 return 1; 98 } 99 100 return 0; 101 } 102 103 104 static void 105 em4k_attach(device_t parent, device_t self, void *aux) 106 { 107 struct em4k_softc *sc; 108 struct zbus_args *zap; 109 110 volatile char *ba; 111 112 zap = aux; 113 sc = device_private(self); 114 sc->sc_dev = self; 115 ba = zap->va; 116 117 sc->model = zap->prodid; 118 119 switch (sc->model) { 120 case ZORRO_PRODID_MED4K: 121 aprint_normal(": ELBOX Mediator PCI 4000\n"); 122 break; 123 case ZORRO_PRODID_MED4KMKII: 124 aprint_normal(": ELBOX Mediator PCI 4000 MK-II\n"); 125 break; 126 default: 127 aprint_normal(": ELBOX Mediator PCI (unknown)\n"); 128 break; 129 } 130 131 /* Setup bus space mappings. */ 132 sc->pci_conf_area.base = (bus_addr_t) ba + EM4K_CONF_OFF; 133 sc->pci_conf_area.absm = &amiga_bus_stride_1swap; 134 135 sc->pci_io_area.base = (bus_addr_t) ba + EM4K_IO_OFF; 136 sc->pci_io_area.absm = &amiga_bus_stride_1swap; 137 138 sc->setup_area.base = (bus_addr_t) ba + EM4K_SETUP_OFF; 139 sc->setup_area.absm = &amiga_bus_stride_1; 140 141 /* 142 * Defer everything until later, we need to wait for possible 143 * emmem attachments. 144 */ 145 146 config_defer(self, em4k_callback); 147 } 148 149 static void 150 em4k_callback(device_t self) { 151 152 struct em4k_softc *sc; 153 pci_chipset_tag_t pc; 154 struct pcibus_attach_args pba; 155 156 sc = device_private(self); 157 pc = &sc->apc; 158 159 #ifdef EM4K_DEBUG 160 aprint_normal("em4k: mapped setup %x->%x, conf %x->%x, io %x->%x\n", 161 kvtop((void*) sc->setup_area.base), sc->setup_area.base, 162 kvtop((void*) sc->pci_conf_area.base), sc->pci_conf_area.base, 163 kvtop((void*) sc->pci_io_area.base), sc->pci_io_area.base); 164 #endif 165 166 sc->pci_conf_t = &(sc->pci_conf_area); 167 sc->pci_io_t = &(sc->pci_io_area); 168 169 if (bus_space_map(sc->pci_conf_t, 0, EM4K_CONF_SIZE, 0, 170 &sc->pci_conf_h)) 171 aprint_error_dev(self, "couldn't map PCI config space\n"); 172 173 if (bus_space_map(sc->pci_io_t, 0, EM4K_IO_SIZE, 0, 174 &sc->pci_io_h)) 175 aprint_error_dev(self, "couldn't map PCI I/O space\n"); 176 177 sc->apc.pci_conf_datat = sc->pci_conf_t; 178 sc->apc.pci_conf_datah = sc->pci_conf_h; 179 180 sc->setup_area_t = &(sc->setup_area); 181 182 if (bus_space_map(sc->setup_area_t, 0, EM4K_SETUP_SIZE, 0, 183 &sc->setup_area_h)) 184 aprint_error_dev(self, 185 "couldn't map Mediator setup space\n"); 186 187 em4k_find_mem(sc); 188 if (sc->pci_mem_win_size == 0) 189 aprint_error_dev(self, 190 "couldn't find memory space, this shouldn't happen!\n"); 191 192 /* Initialize the PCI chipset tag. */ 193 sc->apc.pc_conf_v = (void*) pc; 194 sc->apc.pc_bus_maxdevs = em4k_pci_bus_maxdevs; 195 sc->apc.pc_make_tag = amiga_pci_make_tag; 196 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag; 197 sc->apc.pc_conf_read = em4k_pci_conf_read; 198 sc->apc.pc_conf_write = em4k_pci_conf_write; 199 sc->apc.pc_attach_hook = em4k_pci_attach_hook; 200 201 sc->apc.pc_intr_map = em4k_pci_intr_map; 202 sc->apc.pc_intr_string = amiga_pci_intr_string; 203 sc->apc.pc_intr_establish = amiga_pci_intr_establish; 204 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish; 205 206 sc->apc.pc_conf_hook = em4k_pci_conf_hook; 207 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt; 208 209 sc->apc.cookie = sc; 210 211 #ifdef PCI_NETBSD_CONFIGURE 212 em4k_pci_configure(sc); 213 #endif /* PCI_NETBSD_CONFIGURE */ 214 215 pba.pba_iot = &(sc->pci_io_area); 216 pba.pba_dmat = NULL; 217 pba.pba_dmat64 = NULL; 218 pba.pba_pc = pc; 219 pba.pba_flags = PCI_FLAGS_IO_OKAY; 220 221 if (sc->pci_mem_win_size > 0) { 222 pba.pba_memt = &(sc->pci_mem_win); 223 pba.pba_flags |= PCI_FLAGS_MEM_OKAY; 224 } else 225 pba.pba_memt = NULL; 226 227 pba.pba_bus = 0; 228 pba.pba_bridgetag = NULL; 229 230 /* Set correct window position. */ 231 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 232 EM4K_SETUP_WINDOW_OFF, kvtop((void*) sc->pci_mem_win.base) >> 233 EM4K_WINDOW_SHIFT); 234 235 em4k_intr_enable(sc); 236 237 config_found(self, &pba, pcibusprint, CFARGS_NONE); 238 } 239 240 #ifdef PCI_NETBSD_CONFIGURE 241 static void 242 em4k_pci_configure(struct em4k_softc *sc) 243 { 244 struct pciconf_resources *pcires; 245 246 pcires = pciconf_resource_init(); 247 248 /* I/O addresses are relative to I/O space address. */ 249 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO, 0, EM4K_IO_SIZE); 250 251 /* 252 * Memory space addresses are absolute (and keep in mind that 253 * they are in a separate address space. 254 */ 255 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM, 256 kvtop((void*) sc->pci_mem_win.base), sc->pci_mem_win_size); 257 258 pci_configure_bus(&sc->apc, pcires, 0, CACHELINE_SIZE); 259 260 pciconf_resource_fini(pcires); 261 } 262 #endif /* PCI_NETBSD_CONFIGURE */ 263 264 static void 265 em4k_intr_enable(struct em4k_softc *sc) 266 { 267 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 268 EM4K_SETUP_INTR_OFF, EMPB_INTR_ENABLE); 269 } 270 271 /* 272 * Try to find a (optional) memory window board. 273 */ 274 static void 275 em4k_find_mem(struct em4k_softc *sc) 276 { 277 device_t memdev; 278 struct emmem_softc *mem_sc; 279 280 memdev = device_find_by_xname("emmem0"); 281 sc->pci_mem_win_size = 0; 282 283 if (memdev == NULL) { 284 return; 285 } 286 287 mem_sc = device_private(memdev); 288 289 sc->pci_mem_win.base = (bus_addr_t) mem_sc->sc_base; 290 sc->pci_mem_win.absm = &amiga_bus_stride_1swap_abs; 291 sc->pci_mem_win_size = mem_sc->sc_size; 292 sc->pci_mem_win_t = &sc->pci_mem_win; 293 294 if (sc->pci_mem_win_size == 512*1024*1024) 295 sc->pci_mem_win_mask = EM4K_WINDOW_MASK_512M; 296 else if (sc->pci_mem_win_size == 256*1024*1024) 297 sc->pci_mem_win_mask = EM4K_WINDOW_MASK_256M; 298 else /* disable anyway */ 299 sc->pci_mem_win_size = 0; 300 301 #ifdef EM4K_DEBUG 302 aprint_normal("em4k: found %x b window at %p, switch mask %x\n", 303 sc->pci_mem_win_size, (void*) sc->pci_mem_win.base, 304 sc->pci_mem_win_mask); 305 #endif /* EM4K_DEBUG */ 306 307 } 308 309 pcireg_t 310 em4k_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 311 { 312 uint32_t data; 313 uint32_t bus, dev, func; 314 315 if ((unsigned int)reg >= PCI_CONF_SIZE) 316 return (pcireg_t) -1; 317 318 pci_decompose_tag(pc, tag, &bus, &dev, &func); 319 320 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah, 321 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg); 322 #ifdef EM4K_DEBUG_CONF 323 aprint_normal("em4k conf read va: %lx, bus: %d, dev: %d, " 324 "func: %d, reg: %d -r-> data %x\n", 325 pc->pci_conf_datah, bus, dev, func, reg, data); 326 #endif /* EM4K_DEBUG_CONF */ 327 328 return data; 329 } 330 331 void 332 em4k_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val) 333 { 334 uint32_t bus, dev, func; 335 336 if ((unsigned int)reg >= PCI_CONF_SIZE) 337 return; 338 339 pci_decompose_tag(pc, tag, &bus, &dev, &func); 340 341 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah, 342 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg, val); 343 #ifdef EM4K_DEBUG_CONF 344 aprint_normal("em4k conf write va: %lx, bus: %d, dev: %d, " 345 "func: %d, reg: %d -w-> data %x\n", 346 pc->pci_conf_datah, bus, dev, func, reg, val); 347 #endif /* EM4K_DEBUG_CONF */ 348 } 349 350 int 351 em4k_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 352 { 353 return 6; /* no Mediator with more than 6 slots? */ 354 } 355 356 void 357 em4k_pci_attach_hook(device_t parent, device_t self, 358 struct pcibus_attach_args *pba) 359 { 360 } 361 362 int 363 em4k_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 364 { 365 /* TODO: add sanity checking */ 366 367 *ihp = EMPB_INT; 368 return 0; 369 } 370 371 const struct evcnt * 372 em4k_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 373 { 374 /* TODO: implement */ 375 return NULL; 376 } 377 378 int 379 em4k_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, 380 pcireg_t id) 381 { 382 return PCI_CONF_DEFAULT; 383 } 384