| 1 | /* $NetBSD: if_ex_pci.c,v 1.57 2014/03/29 19:28:24 christos Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1998 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Frank van der Linden; Jason R. Thorpe of the Numerical Aerospace |
| 9 | * Simulation Facility, NASA Ames Research Center. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <sys/cdefs.h> |
| 34 | __KERNEL_RCSID(0, "$NetBSD: if_ex_pci.c,v 1.57 2014/03/29 19:28:24 christos Exp $" ); |
| 35 | |
| 36 | #include <sys/param.h> |
| 37 | #include <sys/systm.h> |
| 38 | #include <sys/mbuf.h> |
| 39 | #include <sys/socket.h> |
| 40 | #include <sys/ioctl.h> |
| 41 | #include <sys/errno.h> |
| 42 | #include <sys/syslog.h> |
| 43 | #include <sys/select.h> |
| 44 | #include <sys/device.h> |
| 45 | |
| 46 | #include <net/if.h> |
| 47 | #include <net/if_dl.h> |
| 48 | #include <net/if_ether.h> |
| 49 | #include <net/if_media.h> |
| 50 | |
| 51 | #include <sys/cpu.h> |
| 52 | #include <sys/bus.h> |
| 53 | #include <sys/intr.h> |
| 54 | |
| 55 | #include <dev/mii/miivar.h> |
| 56 | #include <dev/mii/mii.h> |
| 57 | |
| 58 | #include <dev/ic/elink3var.h> |
| 59 | #include <dev/ic/elink3reg.h> |
| 60 | #include <dev/ic/elinkxlreg.h> |
| 61 | #include <dev/ic/elinkxlvar.h> |
| 62 | |
| 63 | #include <dev/pci/pcivar.h> |
| 64 | #include <dev/pci/pcireg.h> |
| 65 | #include <dev/pci/pcidevs.h> |
| 66 | |
| 67 | struct ex_pci_softc { |
| 68 | struct ex_softc sc_ex; |
| 69 | |
| 70 | /* PCI function status space. 556,556B requests it. */ |
| 71 | bus_space_tag_t sc_funct; |
| 72 | bus_space_handle_t sc_funch; |
| 73 | |
| 74 | pci_chipset_tag_t psc_pc; /* pci chipset tag */ |
| 75 | pcireg_t psc_regs[0x40>>2]; /* saved PCI config regs (sparse) */ |
| 76 | pcitag_t psc_tag; /* pci device tag */ |
| 77 | }; |
| 78 | |
| 79 | /* |
| 80 | * PCI constants. |
| 81 | * XXX These should be in a common file! |
| 82 | */ |
| 83 | #define PCI_CONN 0x48 /* Connector type */ |
| 84 | #define PCI_CBIO PCI_BAR(0) /* Configuration Base IO Address */ |
| 85 | #define PCI_POWERCTL 0xe0 |
| 86 | #define PCI_FUNCMEM PCI_BAR(2) |
| 87 | |
| 88 | #define PCI_INTR 4 |
| 89 | #define PCI_INTRACK 0x00008000 |
| 90 | |
| 91 | static int ex_pci_match(device_t, cfdata_t, void *); |
| 92 | static void ex_pci_attach(device_t, device_t, void *); |
| 93 | static void ex_pci_intr_ack(struct ex_softc *); |
| 94 | |
| 95 | static int ex_pci_enable(struct ex_softc *); |
| 96 | |
| 97 | static void ex_pci_confreg_restore(struct ex_pci_softc *); |
| 98 | static int ex_d3tod0(pci_chipset_tag_t, pcitag_t, device_t, pcireg_t); |
| 99 | |
| 100 | CFATTACH_DECL_NEW(ex_pci, sizeof(struct ex_pci_softc), |
| 101 | ex_pci_match, ex_pci_attach, NULL, NULL); |
| 102 | |
| 103 | static const struct ex_pci_product { |
| 104 | uint32_t epp_prodid; /* PCI product ID */ |
| 105 | int epp_flags; /* initial softc flags */ |
| 106 | const char *epp_name; /* device name */ |
| 107 | } ex_pci_products[] = { |
| 108 | { PCI_PRODUCT_3COM_3C900TPO, 0, |
| 109 | "3c900-TPO Ethernet" }, |
| 110 | { PCI_PRODUCT_3COM_3C900COMBO, 0, |
| 111 | "3c900-COMBO Ethernet" }, |
| 112 | |
| 113 | { PCI_PRODUCT_3COM_3C905TX, EX_CONF_MII, |
| 114 | "3c905-TX 10/100 Ethernet" }, |
| 115 | { PCI_PRODUCT_3COM_3C905T4, EX_CONF_MII, |
| 116 | "3c905-T4 10/100 Ethernet" }, |
| 117 | |
| 118 | { PCI_PRODUCT_3COM_3C900BTPO, EX_CONF_90XB, |
| 119 | "3c900B-TPO Ethernet" }, |
| 120 | { PCI_PRODUCT_3COM_3C900BCOMBO, EX_CONF_90XB, |
| 121 | "3c900B-COMBO Ethernet" }, |
| 122 | { PCI_PRODUCT_3COM_3C900BTPC, EX_CONF_90XB, |
| 123 | "3c900B-TPC Ethernet" }, |
| 124 | |
| 125 | { PCI_PRODUCT_3COM_3C905BTX, EX_CONF_90XB|EX_CONF_MII|EX_CONF_INTPHY, |
| 126 | "3c905B-TX 10/100 Ethernet" }, |
| 127 | { PCI_PRODUCT_3COM_3C905BT4, EX_CONF_90XB|EX_CONF_MII, |
| 128 | "3c905B-T4 10/100 Ethernet" }, |
| 129 | { PCI_PRODUCT_3COM_3C905BCOMBO, EX_CONF_90XB/*|EX_CONF_MII|EX_CONF_INTPHY*/, |
| 130 | "3c905B-COMBO 10/100 Ethernet" }, |
| 131 | { PCI_PRODUCT_3COM_3C905BFX, EX_CONF_90XB, |
| 132 | "3c905B-FX 10/100 Ethernet" }, |
| 133 | |
| 134 | /* XXX Internal PHY? */ |
| 135 | { PCI_PRODUCT_3COM_3C980SRV, EX_CONF_90XB, |
| 136 | "3c980 Server Adapter 10/100 Ethernet" }, |
| 137 | { PCI_PRODUCT_3COM_3C980CTXM, EX_CONF_90XB|EX_CONF_MII, |
| 138 | "3c980C-TXM 10/100 Ethernet" }, |
| 139 | |
| 140 | { PCI_PRODUCT_3COM_3C905CTX, EX_CONF_90XB|EX_CONF_MII, |
| 141 | "3c905C-TX 10/100 Ethernet with mngmt" }, |
| 142 | |
| 143 | { PCI_PRODUCT_3COM_3C450TX, EX_CONF_90XB, |
| 144 | "3c450-TX 10/100 Ethernet" }, |
| 145 | |
| 146 | { PCI_PRODUCT_3COM_3CSOHO100TX, EX_CONF_90XB, |
| 147 | "3cSOHO100-TX 10/100 Ethernet" }, |
| 148 | |
| 149 | { PCI_PRODUCT_3COM_3C555, |
| 150 | EX_CONF_90XB | EX_CONF_MII | EX_CONF_EEPROM_OFF | |
| 151 | EX_CONF_EEPROM_8BIT, |
| 152 | "3c555 MiniPCI 10/100 Ethernet" }, |
| 153 | |
| 154 | { PCI_PRODUCT_3COM_3C556, |
| 155 | EX_CONF_90XB | EX_CONF_MII | EX_CONF_EEPROM_OFF | |
| 156 | EX_CONF_PCI_FUNCREG | EX_CONF_RESETHACK | EX_CONF_INV_LED_POLARITY | |
| 157 | EX_CONF_PHY_POWER | EX_CONF_EEPROM_8BIT, |
| 158 | "3c556 MiniPCI 10/100 Ethernet" }, |
| 159 | |
| 160 | { PCI_PRODUCT_3COM_3C556B, |
| 161 | EX_CONF_90XB | EX_CONF_MII | EX_CONF_EEPROM_OFF | |
| 162 | EX_CONF_PCI_FUNCREG | EX_CONF_RESETHACK | EX_CONF_INV_LED_POLARITY | |
| 163 | EX_CONF_PHY_POWER | EX_CONF_NO_XCVR_PWR, |
| 164 | "3c556B MiniPCI 10/100 Ethernet" }, |
| 165 | |
| 166 | { PCI_PRODUCT_3COM_3C905CXTX, EX_CONF_90XB|EX_CONF_MII, |
| 167 | "3c905CX-TX 10/100 Ethernet with mngmt" }, |
| 168 | |
| 169 | { PCI_PRODUCT_3COM_3C920BEMBW, EX_CONF_90XB|EX_CONF_MII, |
| 170 | "3c920B-EMB-WNM Integrated Fast Ethernet" }, |
| 171 | |
| 172 | { 0, 0, |
| 173 | NULL }, |
| 174 | }; |
| 175 | |
| 176 | static const struct ex_pci_product * |
| 177 | ex_pci_lookup(const struct pci_attach_args *pa) |
| 178 | { |
| 179 | const struct ex_pci_product *epp; |
| 180 | |
| 181 | if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_3COM) |
| 182 | return (NULL); |
| 183 | |
| 184 | for (epp = ex_pci_products; epp->epp_name != NULL; epp++) |
| 185 | if (PCI_PRODUCT(pa->pa_id) == epp->epp_prodid) |
| 186 | return (epp); |
| 187 | return (NULL); |
| 188 | } |
| 189 | |
| 190 | static int |
| 191 | ex_pci_match(device_t parent, cfdata_t match, |
| 192 | void *aux) |
| 193 | { |
| 194 | struct pci_attach_args *pa = (struct pci_attach_args *) aux; |
| 195 | |
| 196 | if (ex_pci_lookup(pa) != NULL) |
| 197 | return (2); /* beat ep_pci */ |
| 198 | |
| 199 | return (0); |
| 200 | } |
| 201 | |
| 202 | static void |
| 203 | ex_pci_attach(device_t parent, device_t self, void *aux) |
| 204 | { |
| 205 | struct ex_pci_softc *psc = device_private(self); |
| 206 | struct ex_softc *sc = &psc->sc_ex; |
| 207 | struct pci_attach_args *pa = aux; |
| 208 | pci_chipset_tag_t pc = pa->pa_pc; |
| 209 | pci_intr_handle_t ih; |
| 210 | const struct ex_pci_product *epp; |
| 211 | const char *intrstr = NULL; |
| 212 | int rev; |
| 213 | int error; |
| 214 | char intrbuf[PCI_INTRSTR_LEN]; |
| 215 | |
| 216 | aprint_naive(": Ethernet controller\n" ); |
| 217 | |
| 218 | sc->sc_dev = self; |
| 219 | |
| 220 | if (pci_mapreg_map(pa, PCI_CBIO, PCI_MAPREG_TYPE_IO, 0, |
| 221 | &sc->sc_iot, &sc->sc_ioh, NULL, NULL)) { |
| 222 | aprint_error(": can't map i/o space\n" ); |
| 223 | return; |
| 224 | } |
| 225 | |
| 226 | epp = ex_pci_lookup(pa); |
| 227 | if (epp == NULL) { |
| 228 | printf("\n" ); |
| 229 | panic("ex_pci_attach: impossible" ); |
| 230 | } |
| 231 | |
| 232 | rev = PCI_REVISION(pci_conf_read(pc, pa->pa_tag, PCI_CLASS_REG)); |
| 233 | aprint_normal(": 3Com %s (rev. 0x%x)\n" , epp->epp_name, rev); |
| 234 | |
| 235 | sc->sc_dmat = pa->pa_dmat; |
| 236 | |
| 237 | sc->ex_conf = epp->epp_flags; |
| 238 | |
| 239 | /* Enable the card. */ |
| 240 | pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, |
| 241 | pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) | |
| 242 | PCI_COMMAND_MASTER_ENABLE); |
| 243 | |
| 244 | psc->psc_pc = pc; |
| 245 | psc->psc_tag = pa->pa_tag; |
| 246 | psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] = |
| 247 | pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); |
| 248 | psc->psc_regs[PCI_BHLC_REG>>2] = |
| 249 | pci_conf_read(pc, pa->pa_tag, PCI_BHLC_REG); |
| 250 | psc->psc_regs[PCI_CBIO>>2] = |
| 251 | pci_conf_read(pc, pa->pa_tag, PCI_CBIO); |
| 252 | |
| 253 | if (sc->ex_conf & EX_CONF_PCI_FUNCREG) { |
| 254 | /* Map PCI function status window. */ |
| 255 | if (pci_mapreg_map(pa, PCI_FUNCMEM, PCI_MAPREG_TYPE_MEM, 0, |
| 256 | &psc->sc_funct, &psc->sc_funch, NULL, NULL)) { |
| 257 | aprint_error_dev(self, |
| 258 | "unable to map function status window\n" ); |
| 259 | return; |
| 260 | } |
| 261 | sc->intr_ack = ex_pci_intr_ack; |
| 262 | |
| 263 | psc->psc_regs[PCI_FUNCMEM>>2] = |
| 264 | pci_conf_read(pc, pa->pa_tag, PCI_FUNCMEM); |
| 265 | } |
| 266 | |
| 267 | psc->psc_regs[PCI_INTERRUPT_REG>>2] = |
| 268 | pci_conf_read(pc, pa->pa_tag, PCI_INTERRUPT_REG); |
| 269 | /* power up chip */ |
| 270 | error = pci_activate(pa->pa_pc, pa->pa_tag, self, ex_d3tod0); |
| 271 | switch (error) { |
| 272 | case EOPNOTSUPP: |
| 273 | break; |
| 274 | case 0: |
| 275 | sc->enable = ex_pci_enable; |
| 276 | sc->disable = NULL; |
| 277 | break; |
| 278 | default: |
| 279 | aprint_error_dev(self, "cannot activate %d\n" , error); |
| 280 | return; |
| 281 | } |
| 282 | sc->enabled = 1; |
| 283 | |
| 284 | /* Map and establish the interrupt. */ |
| 285 | if (pci_intr_map(pa, &ih)) { |
| 286 | aprint_error_dev(self, "couldn't map interrupt\n" ); |
| 287 | return; |
| 288 | } |
| 289 | |
| 290 | intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf)); |
| 291 | sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, ex_intr, sc); |
| 292 | if (sc->sc_ih == NULL) { |
| 293 | aprint_error_dev(self, "couldn't establish interrupt" ); |
| 294 | if (intrstr != NULL) |
| 295 | aprint_error(" at %s" , intrstr); |
| 296 | aprint_error("\n" ); |
| 297 | return; |
| 298 | } |
| 299 | aprint_normal_dev(self, "interrupting at %s\n" , intrstr); |
| 300 | |
| 301 | ex_config(sc); |
| 302 | |
| 303 | if (sc->ex_conf & EX_CONF_PCI_FUNCREG) |
| 304 | bus_space_write_4(psc->sc_funct, psc->sc_funch, PCI_INTR, |
| 305 | PCI_INTRACK); |
| 306 | |
| 307 | if (sc->disable != NULL) |
| 308 | ex_disable(sc); |
| 309 | } |
| 310 | |
| 311 | static void |
| 312 | ex_pci_intr_ack(struct ex_softc *sc) |
| 313 | { |
| 314 | struct ex_pci_softc *psc = (struct ex_pci_softc *)sc; |
| 315 | |
| 316 | bus_space_write_4(psc->sc_funct, psc->sc_funch, PCI_INTR, |
| 317 | PCI_INTRACK); |
| 318 | } |
| 319 | |
| 320 | static int |
| 321 | ex_d3tod0(pci_chipset_tag_t pc, pcitag_t tag, device_t self, pcireg_t state) |
| 322 | { |
| 323 | |
| 324 | #define PCI_CACHE_LAT_BIST 0x0c |
| 325 | #define PCI_EXP_ROM_BAR 0x30 |
| 326 | #define PCI_INT_GNT_LAT 0x3c |
| 327 | |
| 328 | uint32_t base0; |
| 329 | uint32_t base1; |
| 330 | uint32_t romaddr; |
| 331 | uint32_t pci_int_lat; |
| 332 | uint32_t pci_cache_lat; |
| 333 | |
| 334 | if (state != PCI_PMCSR_STATE_D3) |
| 335 | return 0; |
| 336 | |
| 337 | aprint_normal_dev(self, "found in power state D%d, " |
| 338 | "attempting to recover.\n" , state); |
| 339 | /* XXX is this needed? */ |
| 340 | (void)pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); |
| 341 | base0 = pci_conf_read(pc, tag, PCI_BAR0); |
| 342 | base1 = pci_conf_read(pc, tag, PCI_BAR1); |
| 343 | romaddr = pci_conf_read(pc, tag, PCI_EXP_ROM_BAR); |
| 344 | pci_cache_lat= pci_conf_read(pc, tag, PCI_CACHE_LAT_BIST); |
| 345 | pci_int_lat = pci_conf_read(pc, tag, PCI_INT_GNT_LAT); |
| 346 | |
| 347 | pci_conf_write(pc, tag, PCI_POWERCTL, 0); |
| 348 | pci_conf_write(pc, tag, PCI_BAR0, base0); |
| 349 | pci_conf_write(pc, tag, PCI_BAR1, base1); |
| 350 | pci_conf_write(pc, tag, PCI_EXP_ROM_BAR, romaddr); |
| 351 | pci_conf_write(pc, tag, PCI_INT_GNT_LAT, pci_int_lat); |
| 352 | pci_conf_write(pc, tag, PCI_CACHE_LAT_BIST, pci_cache_lat); |
| 353 | pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, |
| 354 | (PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_IO_ENABLE)); |
| 355 | aprint_normal_dev(self, "changed power state to D0.\n" ); |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | static void |
| 360 | ex_pci_confreg_restore(struct ex_pci_softc *psc) |
| 361 | { |
| 362 | struct ex_softc *sc = (void *) psc; |
| 363 | pcireg_t reg; |
| 364 | |
| 365 | reg = pci_conf_read(psc->psc_pc, psc->psc_tag, PCI_COMMAND_STATUS_REG); |
| 366 | |
| 367 | pci_conf_write(psc->psc_pc, psc->psc_tag, |
| 368 | PCI_COMMAND_STATUS_REG, |
| 369 | (reg & 0xffff0000) | |
| 370 | (psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] & 0xffff)); |
| 371 | pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_BHLC_REG, |
| 372 | psc->psc_regs[PCI_BHLC_REG>>2]); |
| 373 | pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_CBIO, |
| 374 | psc->psc_regs[PCI_CBIO>>2]); |
| 375 | if (sc->ex_conf & EX_CONF_PCI_FUNCREG) |
| 376 | pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_FUNCMEM, |
| 377 | psc->psc_regs[PCI_FUNCMEM>>2]); |
| 378 | pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_INTERRUPT_REG, |
| 379 | psc->psc_regs[PCI_INTERRUPT_REG>>2]); |
| 380 | } |
| 381 | |
| 382 | static int |
| 383 | ex_pci_enable(struct ex_softc *sc) |
| 384 | { |
| 385 | struct ex_pci_softc *psc = (void *) sc; |
| 386 | |
| 387 | aprint_debug_dev(sc->sc_dev, "going to power state D0\n" ); |
| 388 | |
| 389 | /* Now restore the configuration registers. */ |
| 390 | ex_pci_confreg_restore(psc); |
| 391 | |
| 392 | return (0); |
| 393 | } |
| 394 | |