if_rtw_pci.c revision 1.23
1 /* $NetBSD: if_rtw_pci.c,v 1.23 2014/03/29 19:28:25 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2004, 2005, 2010 David Young. All rights reserved. 5 * 6 * Adapted for the RTL8180 by David Young. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 19 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 20 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David 21 * Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 28 * OF SUCH DAMAGE. 29 */ 30 /*- 31 * Copyright (c) 1998, 1999, 2000, 2002 The NetBSD Foundation, Inc. 32 * All rights reserved. 33 * 34 * This code is derived from software contributed to The NetBSD Foundation 35 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 36 * NASA Ames Research Center; Charles M. Hannum; and David Young. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 48 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 49 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 50 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 51 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 57 * POSSIBILITY OF SUCH DAMAGE. 58 */ 59 60 /* 61 * PCI bus front-end for the Realtek RTL8180 802.11 MAC/BBP chip. 62 * 63 * Derived from the ADMtek ADM8211 PCI bus front-end. 64 * 65 * Derived from the ``Tulip'' PCI bus front-end. 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: if_rtw_pci.c,v 1.23 2014/03/29 19:28:25 christos Exp $"); 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/mbuf.h> 74 #include <sys/malloc.h> 75 #include <sys/kernel.h> 76 #include <sys/socket.h> 77 #include <sys/ioctl.h> 78 #include <sys/errno.h> 79 #include <sys/device.h> 80 81 #include <machine/endian.h> 82 83 #include <net/if.h> 84 #include <net/if_dl.h> 85 #include <net/if_media.h> 86 #include <net/if_ether.h> 87 88 #include <net80211/ieee80211_netbsd.h> 89 #include <net80211/ieee80211_radiotap.h> 90 #include <net80211/ieee80211_var.h> 91 92 #include <sys/bus.h> 93 #include <sys/intr.h> 94 95 #include <dev/ic/rtwreg.h> 96 #include <dev/ic/rtwvar.h> 97 98 #include <dev/pci/pcivar.h> 99 #include <dev/pci/pcireg.h> 100 #include <dev/pci/pcidevs.h> 101 102 /* 103 * PCI configuration space registers used by the RTL8180. 104 */ 105 #define RTW_PCI_IOBA PCI_BAR(0) /* i/o mapped base */ 106 #define RTW_PCI_MMBA PCI_BAR(1) /* memory mapped base */ 107 108 struct rtw_pci_softc { 109 struct rtw_softc psc_rtw; 110 111 pcireg_t psc_csr; 112 void *psc_ih; 113 pci_chipset_tag_t psc_pc; 114 pci_intr_handle_t psc_pih; 115 pcitag_t psc_tag; 116 }; 117 118 static void rtw_pci_attach(device_t, device_t, void *); 119 static int rtw_pci_detach(device_t, int); 120 #if 0 121 static void rtw_pci_funcregen(struct rtw_regs *, int); 122 #endif 123 static const struct rtw_pci_product * 124 rtw_pci_lookup(const struct pci_attach_args *); 125 static int rtw_pci_match(device_t, cfdata_t, void *); 126 static bool rtw_pci_resume(device_t, const pmf_qual_t *); 127 static int rtw_pci_setup(struct rtw_pci_softc *); 128 static bool rtw_pci_suspend(device_t, const pmf_qual_t *); 129 130 CFATTACH_DECL3_NEW(rtw_pci, sizeof(struct rtw_pci_softc), 131 rtw_pci_match, rtw_pci_attach, rtw_pci_detach, NULL, NULL, NULL, 132 DVF_DETACH_SHUTDOWN); 133 134 static const struct rtw_pci_product { 135 u_int32_t rpp_vendor; /* PCI vendor ID */ 136 u_int32_t rpp_product; /* PCI product ID */ 137 const char *rpp_product_name; 138 } rtw_pci_products[] = { 139 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8180, 140 "Realtek RTL8180 802.11 MAC/BBP" }, 141 #ifdef RTW_DEBUG 142 #if 0 /* These came from openbsd, netbsd doesn't have the definitions. */ 143 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8185, 144 "Realtek RTL8185 802.11 MAC/BBP" }, 145 { PCI_VENDOR_BELKIN2, PCI_PRODUCT_BELKIN2_F5D7010, 146 "Belkin F5D7010" }, 147 #endif 148 #endif 149 { PCI_VENDOR_BELKIN, PCI_PRODUCT_BELKIN_F5D6001, 150 "Belkin F5D6001" }, 151 { PCI_VENDOR_BELKIN, PCI_PRODUCT_BELKIN_F5D6020V3, 152 "Belkin F5D6020v3" }, 153 {PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DWL610, 154 "DWL-610 D-Link Air 802.11b (RTL8180 MAC/BBP)"}, 155 { 0, 0, NULL }, 156 }; 157 158 static const struct rtw_pci_product * 159 rtw_pci_lookup(const struct pci_attach_args *pa) 160 { 161 const struct rtw_pci_product *rpp; 162 163 for (rpp = rtw_pci_products; rpp->rpp_product_name != NULL; rpp++) { 164 if (PCI_VENDOR(pa->pa_id) == rpp->rpp_vendor && 165 PCI_PRODUCT(pa->pa_id) == rpp->rpp_product) 166 return rpp; 167 } 168 return NULL; 169 } 170 171 static int 172 rtw_pci_match(device_t parent, cfdata_t match, void *aux) 173 { 174 struct pci_attach_args *pa = aux; 175 176 if (rtw_pci_lookup(pa) != NULL) 177 return 1; 178 179 return 0; 180 } 181 182 static void 183 rtw_pci_attach(device_t parent, device_t self, void *aux) 184 { 185 struct rtw_pci_softc *psc = device_private(self); 186 struct rtw_softc *sc = &psc->psc_rtw; 187 struct rtw_regs *regs = &sc->sc_regs; 188 struct pci_attach_args *pa = aux; 189 const char *intrstr = NULL; 190 const struct rtw_pci_product *rpp; 191 char intrbuf[PCI_INTRSTR_LEN]; 192 193 sc->sc_dev = self; 194 sc->sc_dmat = pa->pa_dmat; 195 psc->psc_pc = pa->pa_pc; 196 psc->psc_tag = pa->pa_tag; 197 198 rpp = rtw_pci_lookup(pa); 199 if (rpp == NULL) { 200 printf("\n"); 201 panic("rtw_pci_attach: impossible"); 202 } 203 204 /* 205 * Get revision info, and set some chip-specific variables. 206 */ 207 sc->sc_rev = PCI_REVISION(pa->pa_class); 208 aprint_normal(": %s, revision %d.%d signature %08x\n", 209 rpp->rpp_product_name, 210 (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf, 211 pci_conf_read(psc->psc_pc, psc->psc_tag, 0x80)); 212 213 /* 214 * Map the device. 215 */ 216 psc->psc_csr = PCI_COMMAND_MASTER_ENABLE | 217 PCI_COMMAND_PARITY_ENABLE | 218 PCI_COMMAND_SERR_ENABLE; 219 if (pci_mapreg_map(pa, RTW_PCI_MMBA, PCI_MAPREG_TYPE_MEM, 0, 220 ®s->r_bt, ®s->r_bh, NULL, ®s->r_sz) == 0) { 221 RTW_DPRINTF(RTW_DEBUG_ATTACH, 222 ("%s: %s mapped %" PRIuMAX " bytes mem space\n", 223 device_xname(self), __func__, (uintmax_t)regs->r_sz)); 224 psc->psc_csr |= PCI_COMMAND_MEM_ENABLE; 225 } else if (pci_mapreg_map(pa, RTW_PCI_IOBA, PCI_MAPREG_TYPE_IO, 0, 226 ®s->r_bt, ®s->r_bh, NULL, ®s->r_sz) == 0) { 227 RTW_DPRINTF(RTW_DEBUG_ATTACH, 228 ("%s: %s mapped %" PRIuMAX " bytes I/O space\n", 229 device_xname(self), __func__, (uintmax_t)regs->r_sz)); 230 psc->psc_csr |= PCI_COMMAND_IO_ENABLE; 231 } else { 232 aprint_error_dev(self, "unable to map device registers\n"); 233 return; 234 } 235 236 /* 237 * Bring the chip out of powersave mode and initialize the 238 * configuration registers. 239 */ 240 if (rtw_pci_setup(psc) != 0) 241 return; 242 243 /* 244 * Map and establish our interrupt. 245 */ 246 if (pci_intr_map(pa, &psc->psc_pih)) { 247 aprint_error_dev(self, "unable to map interrupt\n"); 248 return; 249 } 250 intrstr = pci_intr_string(psc->psc_pc, psc->psc_pih, intrbuf, sizeof(intrbuf)); 251 psc->psc_ih = pci_intr_establish(psc->psc_pc, psc->psc_pih, IPL_NET, 252 rtw_intr, sc); 253 if (psc->psc_ih == NULL) { 254 aprint_error_dev(self, "unable to establish interrupt"); 255 if (intrstr != NULL) 256 aprint_error(" at %s", intrstr); 257 aprint_error("\n"); 258 return; 259 } 260 261 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 262 263 /* 264 * Finish off the attach. 265 */ 266 rtw_attach(sc); 267 268 if (pmf_device_register(self, rtw_pci_suspend, rtw_pci_resume)) { 269 pmf_class_network_register(self, &sc->sc_if); 270 /* 271 * Power down the socket. 272 */ 273 pmf_device_suspend(self, &sc->sc_qual); 274 } else 275 aprint_error_dev(self, "couldn't establish power handler\n"); 276 } 277 278 static int 279 rtw_pci_detach(device_t self, int flags) 280 { 281 struct rtw_pci_softc *psc = device_private(self); 282 struct rtw_softc *sc = &psc->psc_rtw; 283 struct rtw_regs *regs = &sc->sc_regs; 284 int rc; 285 286 if ((rc = rtw_detach(sc)) != 0) 287 return rc; 288 if (psc->psc_ih != NULL) 289 pci_intr_disestablish(psc->psc_pc, psc->psc_ih); 290 bus_space_unmap(regs->r_bt, regs->r_bh, regs->r_sz); 291 292 return 0; 293 } 294 295 static bool 296 rtw_pci_resume(device_t self, const pmf_qual_t *qual) 297 { 298 struct rtw_pci_softc *psc = device_private(self); 299 struct rtw_softc *sc = &psc->psc_rtw; 300 301 /* Establish the interrupt. */ 302 psc->psc_ih = pci_intr_establish(psc->psc_pc, psc->psc_pih, IPL_NET, 303 rtw_intr, sc); 304 if (psc->psc_ih == NULL) { 305 aprint_error_dev(sc->sc_dev, "unable to establish interrupt\n"); 306 return false; 307 } 308 309 return rtw_resume(self, qual); 310 } 311 312 static bool 313 rtw_pci_suspend(device_t self, const pmf_qual_t *qual) 314 { 315 struct rtw_pci_softc *psc = device_private(self); 316 317 if (!rtw_suspend(self, qual)) 318 return false; 319 320 /* Unhook the interrupt handler. */ 321 pci_intr_disestablish(psc->psc_pc, psc->psc_ih); 322 psc->psc_ih = NULL; 323 return true; 324 } 325 326 static int 327 rtw_pci_setup(struct rtw_pci_softc *psc) 328 { 329 pcitag_t tag = psc->psc_tag; 330 pcireg_t bhlc, csr, lattimer; 331 device_t self = psc->psc_rtw.sc_dev; 332 int rc; 333 334 /* power up chip */ 335 rc = pci_activate(psc->psc_pc, psc->psc_tag, self, NULL); 336 337 if (rc != 0 && rc != EOPNOTSUPP) { 338 aprint_error_dev(self, "cannot activate (%d)\n", rc); 339 return rc; 340 } 341 342 /* I believe the datasheet tries to warn us that the RTL8180 343 * wants for 16 (0x10) to divide the latency timer. 344 */ 345 bhlc = pci_conf_read(psc->psc_pc, tag, PCI_BHLC_REG); 346 lattimer = rounddown(PCI_LATTIMER(bhlc), 0x10); 347 if (PCI_LATTIMER(bhlc) != lattimer) { 348 bhlc &= ~(PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT); 349 bhlc |= (lattimer << PCI_LATTIMER_SHIFT); 350 pci_conf_write(psc->psc_pc, tag, PCI_BHLC_REG, bhlc); 351 } 352 353 /* Enable the appropriate bits in the PCI CSR. */ 354 csr = pci_conf_read(psc->psc_pc, tag, PCI_COMMAND_STATUS_REG); 355 csr &= ~(PCI_COMMAND_IO_ENABLE|PCI_COMMAND_MEM_ENABLE); 356 csr |= psc->psc_csr; 357 pci_conf_write(psc->psc_pc, tag, PCI_COMMAND_STATUS_REG, csr); 358 359 return 0; 360 } 361
Indexes created Wed Sep 24 15:09:51 GMT 2025