1 /* $NetBSD: em4k.c,v 1.6 2020/07/07 03:38:45 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/malloc.h> 41 #include <sys/kmem.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <machine/bus.h> 46 #include <machine/cpu.h> 47 48 #include <amiga/dev/zbusvar.h> 49 #include <amiga/pci/empbreg.h> 50 #include <amiga/pci/em4kvar.h> 51 #include <amiga/pci/emmemvar.h> 52 53 #include <dev/pci/pciconf.h> 54 55 #include "opt_pci.h" 56 57 static int em4k_match(device_t, cfdata_t, void *); 58 static void em4k_attach(device_t, device_t, void *); 59 static void em4k_callback(device_t); 60 61 static void em4k_find_mem(struct em4k_softc *); 62 static void em4k_intr_enable(struct em4k_softc *); 63 64 pcireg_t em4k_pci_conf_read(pci_chipset_tag_t, pcitag_t, int); 65 void em4k_pci_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t); 66 int em4k_pci_bus_maxdevs(pci_chipset_tag_t, int); 67 void em4k_pci_attach_hook(device_t, device_t, 68 struct pcibus_attach_args *); 69 pcitag_t em4k_pci_make_tag(pci_chipset_tag_t, int, int, int); 70 void em4k_pci_decompose_tag(pci_chipset_tag_t, pcitag_t, 71 int *, int *, int *); 72 int em4k_pci_intr_map(const struct pci_attach_args *, 73 pci_intr_handle_t *); 74 const struct evcnt * em4k_pci_intr_evcnt(pci_chipset_tag_t, 75 pci_intr_handle_t); 76 int em4k_pci_conf_hook(pci_chipset_tag_t, int, int, int, pcireg_t); 77 78 #ifdef PCI_NETBSD_CONFIGURE 79 static void em4k_pci_configure(struct em4k_softc *sc); 80 #endif /* PCI_NETBSD_CONFIGURE */ 81 82 CFATTACH_DECL_NEW(em4k, sizeof(struct em4k_softc), 83 em4k_match, em4k_attach, NULL, NULL); 84 85 static int 86 em4k_match(device_t parent, cfdata_t cf, void *aux) 87 { 88 struct zbus_args *zap; 89 90 zap = aux; 91 92 if (zap->manid != ZORRO_MANID_ELBOX) 93 return 0; 94 95 switch (zap->prodid) { 96 case ZORRO_PRODID_MED4K: 97 case ZORRO_PRODID_MED4KMKII: 98 return 1; 99 } 100 101 return 0; 102 } 103 104 105 static void 106 em4k_attach(device_t parent, device_t self, void *aux) 107 { 108 struct em4k_softc *sc; 109 struct zbus_args *zap; 110 111 volatile char *ba; 112 113 zap = aux; 114 sc = device_private(self); 115 sc->sc_dev = self; 116 ba = zap->va; 117 118 sc->model = zap->prodid; 119 120 switch (sc->model) { 121 case ZORRO_PRODID_MED4K: 122 aprint_normal(": ELBOX Mediator PCI 4000\n"); 123 break; 124 case ZORRO_PRODID_MED4KMKII: 125 aprint_normal(": ELBOX Mediator PCI 4000 MK-II\n"); 126 break; 127 default: 128 aprint_normal(": ELBOX Mediator PCI (unknown)\n"); 129 break; 130 } 131 132 /* Setup bus space mappings. */ 133 sc->pci_conf_area.base = (bus_addr_t) ba + EM4K_CONF_OFF; 134 sc->pci_conf_area.absm = &amiga_bus_stride_1swap; 135 136 sc->pci_io_area.base = (bus_addr_t) ba + EM4K_IO_OFF; 137 sc->pci_io_area.absm = &amiga_bus_stride_1swap; 138 139 sc->setup_area.base = (bus_addr_t) ba + EM4K_SETUP_OFF; 140 sc->setup_area.absm = &amiga_bus_stride_1; 141 142 /* 143 * Defer everything until later, we need to wait for possible 144 * emmem attachments. 145 */ 146 147 config_defer(self, em4k_callback); 148 } 149 150 static void 151 em4k_callback(device_t self) { 152 153 struct em4k_softc *sc; 154 pci_chipset_tag_t pc; 155 struct pcibus_attach_args pba; 156 157 sc = device_private(self); 158 pc = &sc->apc; 159 160 #ifdef EM4K_DEBUG 161 aprint_normal("em4k: mapped setup %x->%x, conf %x->%x, io %x->%x\n", 162 kvtop((void*) sc->setup_area.base), sc->setup_area.base, 163 kvtop((void*) sc->pci_conf_area.base), sc->pci_conf_area.base, 164 kvtop((void*) sc->pci_io_area.base), sc->pci_io_area.base); 165 #endif 166 167 sc->pci_conf_t = &(sc->pci_conf_area); 168 sc->pci_io_t = &(sc->pci_io_area); 169 170 if (bus_space_map(sc->pci_conf_t, 0, EM4K_CONF_SIZE, 0, 171 &sc->pci_conf_h)) 172 aprint_error_dev(self, "couldn't map PCI config space\n"); 173 174 if (bus_space_map(sc->pci_io_t, 0, EM4K_IO_SIZE, 0, 175 &sc->pci_io_h)) 176 aprint_error_dev(self, "couldn't map PCI I/O space\n"); 177 178 sc->apc.pci_conf_datat = sc->pci_conf_t; 179 sc->apc.pci_conf_datah = sc->pci_conf_h; 180 181 sc->setup_area_t = &(sc->setup_area); 182 183 if (bus_space_map(sc->setup_area_t, 0, EM4K_SETUP_SIZE, 0, 184 &sc->setup_area_h)) 185 aprint_error_dev(self, 186 "couldn't map Mediator setup space\n"); 187 188 em4k_find_mem(sc); 189 if (sc->pci_mem_win_size == 0) 190 aprint_error_dev(self, 191 "couldn't find memory space, this shouldn't happen!\n"); 192 193 /* Initialize the PCI chipset tag. */ 194 sc->apc.pc_conf_v = (void*) pc; 195 sc->apc.pc_bus_maxdevs = em4k_pci_bus_maxdevs; 196 sc->apc.pc_make_tag = amiga_pci_make_tag; 197 sc->apc.pc_decompose_tag = amiga_pci_decompose_tag; 198 sc->apc.pc_conf_read = em4k_pci_conf_read; 199 sc->apc.pc_conf_write = em4k_pci_conf_write; 200 sc->apc.pc_attach_hook = em4k_pci_attach_hook; 201 202 sc->apc.pc_intr_map = em4k_pci_intr_map; 203 sc->apc.pc_intr_string = amiga_pci_intr_string; 204 sc->apc.pc_intr_establish = amiga_pci_intr_establish; 205 sc->apc.pc_intr_disestablish = amiga_pci_intr_disestablish; 206 207 sc->apc.pc_conf_hook = em4k_pci_conf_hook; 208 sc->apc.pc_conf_interrupt = amiga_pci_conf_interrupt; 209 210 sc->apc.cookie = sc; 211 212 #ifdef PCI_NETBSD_CONFIGURE 213 em4k_pci_configure(sc); 214 #endif /* PCI_NETBSD_CONFIGURE */ 215 216 pba.pba_iot = &(sc->pci_io_area); 217 pba.pba_dmat = NULL; 218 pba.pba_dmat64 = NULL; 219 pba.pba_pc = pc; 220 pba.pba_flags = PCI_FLAGS_IO_OKAY; 221 222 if (sc->pci_mem_win_size > 0) { 223 pba.pba_memt = &(sc->pci_mem_win); 224 pba.pba_flags |= PCI_FLAGS_MEM_OKAY; 225 } else 226 pba.pba_memt = NULL; 227 228 pba.pba_bus = 0; 229 pba.pba_bridgetag = NULL; 230 231 /* Set correct window position. */ 232 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 233 EM4K_SETUP_WINDOW_OFF, kvtop((void*) sc->pci_mem_win.base) >> 234 EM4K_WINDOW_SHIFT); 235 236 em4k_intr_enable(sc); 237 238 config_found_ia(self, "pcibus", &pba, pcibusprint); 239 } 240 241 #ifdef PCI_NETBSD_CONFIGURE 242 static void 243 em4k_pci_configure(struct em4k_softc *sc) 244 { 245 struct pciconf_resources *pcires; 246 247 pcires = pciconf_resource_init(); 248 249 /* I/O addresses are relative to I/O space address. */ 250 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO, 0, EM4K_IO_SIZE); 251 252 /* 253 * Memory space addresses are absolute (and keep in mind that 254 * they are in a separate address space. 255 */ 256 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM, 257 kvtop((void*) sc->pci_mem_win.base), sc->pci_mem_win_size); 258 259 pci_configure_bus(&sc->apc, pcires, 0, CACHELINE_SIZE); 260 261 pciconf_resource_fini(pcires); 262 } 263 #endif /* PCI_NETBSD_CONFIGURE */ 264 265 static void 266 em4k_intr_enable(struct em4k_softc *sc) 267 { 268 bus_space_write_1(sc->setup_area_t, sc->setup_area_h, 269 EM4K_SETUP_INTR_OFF, EMPB_INTR_ENABLE); 270 } 271 272 /* 273 * Try to find a (optional) memory window board. 274 */ 275 static void 276 em4k_find_mem(struct em4k_softc *sc) 277 { 278 device_t memdev; 279 struct emmem_softc *mem_sc; 280 281 memdev = device_find_by_xname("emmem0"); 282 sc->pci_mem_win_size = 0; 283 284 if (memdev == NULL) { 285 return; 286 } 287 288 mem_sc = device_private(memdev); 289 290 sc->pci_mem_win.base = (bus_addr_t) mem_sc->sc_base; 291 sc->pci_mem_win.absm = &amiga_bus_stride_1swap_abs; 292 sc->pci_mem_win_size = mem_sc->sc_size; 293 sc->pci_mem_win_t = &sc->pci_mem_win; 294 295 if (sc->pci_mem_win_size == 512*1024*1024) 296 sc->pci_mem_win_mask = EM4K_WINDOW_MASK_512M; 297 else if (sc->pci_mem_win_size == 256*1024*1024) 298 sc->pci_mem_win_mask = EM4K_WINDOW_MASK_256M; 299 else /* disable anyway */ 300 sc->pci_mem_win_size = 0; 301 302 #ifdef EM4K_DEBUG 303 aprint_normal("em4k: found %x b window at %p, switch mask %x\n", 304 sc->pci_mem_win_size, (void*) sc->pci_mem_win.base, 305 sc->pci_mem_win_mask); 306 #endif /* EM4K_DEBUG */ 307 308 } 309 310 pcireg_t 311 em4k_pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) 312 { 313 uint32_t data; 314 uint32_t bus, dev, func; 315 316 if ((unsigned int)reg >= PCI_CONF_SIZE) 317 return (pcireg_t) -1; 318 319 pci_decompose_tag(pc, tag, &bus, &dev, &func); 320 321 data = bus_space_read_4(pc->pci_conf_datat, pc->pci_conf_datah, 322 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg); 323 #ifdef EM4K_DEBUG_CONF 324 aprint_normal("em4k conf read va: %lx, bus: %d, dev: %d, " 325 "func: %d, reg: %d -r-> data %x\n", 326 pc->pci_conf_datah, bus, dev, func, reg, data); 327 #endif /* EM4K_DEBUG_CONF */ 328 329 return data; 330 } 331 332 void 333 em4k_pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val) 334 { 335 uint32_t bus, dev, func; 336 337 if ((unsigned int)reg >= PCI_CONF_SIZE) 338 return; 339 340 pci_decompose_tag(pc, tag, &bus, &dev, &func); 341 342 bus_space_write_4(pc->pci_conf_datat, pc->pci_conf_datah, 343 EMPB_CONF_DEV_STRIDE*dev + EMPB_CONF_FUNC_STRIDE*func + reg, val); 344 #ifdef EM4K_DEBUG_CONF 345 aprint_normal("em4k conf write va: %lx, bus: %d, dev: %d, " 346 "func: %d, reg: %d -w-> data %x\n", 347 pc->pci_conf_datah, bus, dev, func, reg, val); 348 #endif /* EM4K_DEBUG_CONF */ 349 } 350 351 int 352 em4k_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 353 { 354 return 6; /* no Mediator with more than 6 slots? */ 355 } 356 357 void 358 em4k_pci_attach_hook(device_t parent, device_t self, 359 struct pcibus_attach_args *pba) 360 { 361 } 362 363 int 364 em4k_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 365 { 366 /* TODO: add sanity checking */ 367 368 *ihp = EMPB_INT; 369 return 0; 370 } 371 372 const struct evcnt * 373 em4k_pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) 374 { 375 /* TODO: implement */ 376 return NULL; 377 } 378 379 int 380 em4k_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, 381 pcireg_t id) 382 { 383 return PCI_CONF_DEFAULT; 384 } 385