1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 15 * redistribution must be conditioned upon including a substantially 16 * similar Disclaimer requirement for further binary redistribution. 17 * 18 * NO WARRANTY 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 24 * OR 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 27 * IN 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 29 * THE POSSIBILITY OF SUCH DAMAGES. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 /* 36 * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver. 37 */ 38 #include "opt_ath.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/malloc.h> 43 #include <sys/module.h> 44 #include <sys/kernel.h> 45 #include <sys/lock.h> 46 #include <sys/mutex.h> 47 #include <sys/errno.h> 48 49 #include <machine/bus.h> 50 #include <machine/resource.h> 51 #include <sys/bus.h> 52 #include <sys/rman.h> 53 54 #include <sys/socket.h> 55 56 #include <net/if.h> 57 #include <net/if_media.h> 58 #include <net/if_arp.h> 59 #include <net/ethernet.h> 60 61 #include <net80211/ieee80211_var.h> 62 63 #include <dev/ath/if_athvar.h> 64 65 #include <dev/pci/pcivar.h> 66 #include <dev/pci/pcireg.h> 67 68 /* For EEPROM firmware */ 69 #ifdef ATH_EEPROM_FIRMWARE 70 #include <sys/linker.h> 71 #include <sys/firmware.h> 72 #endif /* ATH_EEPROM_FIRMWARE */ 73 74 /* 75 * PCI glue. 76 */ 77 78 struct ath_pci_softc { 79 struct ath_softc sc_sc; 80 struct resource *sc_sr; /* memory resource */ 81 struct resource *sc_irq; /* irq resource */ 82 void *sc_ih; /* interrupt handler */ 83 }; 84 85 #define PCI_VDEVICE(v, d) \ 86 PCI_DEV(v,d) 87 88 #define PCI_DEVICE_SUB(v, d, sv, sd) \ 89 PCI_DEV(v, d), PCI_SUBDEV(sv, sd) 90 91 #define PCI_VENDOR_ID_ATHEROS 0x168c 92 #define PCI_VENDOR_ID_SAMSUNG 0x144d 93 #define PCI_VENDOR_ID_AZWAVE 0x1a3b 94 #define PCI_VENDOR_ID_FOXCONN 0x105b 95 #define PCI_VENDOR_ID_ATTANSIC 0x1969 96 #define PCI_VENDOR_ID_ASUSTEK 0x1043 97 #define PCI_VENDOR_ID_DELL 0x1028 98 #define PCI_VENDOR_ID_QMI 0x1a32 99 #define PCI_VENDOR_ID_LENOVO 0x17aa 100 #define PCI_VENDOR_ID_HP 0x103c 101 102 #include "if_ath_pci_devlist.h" 103 104 #define BS_BAR 0x10 105 #define PCIR_RETRY_TIMEOUT 0x41 106 #define PCIR_CFG_PMCSR 0x48 107 108 #define DEFAULT_CACHESIZE 32 109 110 static void 111 ath_pci_setup(device_t dev) 112 { 113 uint8_t cz; 114 115 /* XXX TODO: need to override the _system_ saved copies of this */ 116 117 /* 118 * If the cache line size is 0, force it to a reasonable 119 * value. 120 */ 121 cz = pci_read_config(dev, PCIR_CACHELNSZ, 1); 122 if (cz == 0) { 123 pci_write_config(dev, PCIR_CACHELNSZ, 124 DEFAULT_CACHESIZE / 4, 1); 125 } 126 127 /* Override the system latency timer */ 128 pci_write_config(dev, PCIR_LATTIMER, 0xa8, 1); 129 130 /* If a PCI NIC, force wakeup */ 131 #ifdef ATH_PCI_WAKEUP_WAR 132 /* XXX TODO: don't do this for non-PCI (ie, PCIe, Cardbus!) */ 133 if (1) { 134 uint16_t pmcsr; 135 pmcsr = pci_read_config(dev, PCIR_CFG_PMCSR, 2); 136 pmcsr |= 3; 137 pci_write_config(dev, PCIR_CFG_PMCSR, pmcsr, 2); 138 pmcsr &= ~3; 139 pci_write_config(dev, PCIR_CFG_PMCSR, pmcsr, 2); 140 } 141 #endif 142 143 /* 144 * Disable retry timeout to keep PCI Tx retries from 145 * interfering with C3 CPU state. 146 */ 147 pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1); 148 } 149 150 static int 151 ath_pci_probe(device_t dev) 152 { 153 const char* devname; 154 155 devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev)); 156 if (devname != NULL) { 157 device_set_desc(dev, devname); 158 return BUS_PROBE_DEFAULT; 159 } 160 return ENXIO; 161 } 162 163 static int 164 ath_pci_attach(device_t dev) 165 { 166 struct ath_pci_softc *psc = device_get_softc(dev); 167 struct ath_softc *sc = &psc->sc_sc; 168 int error = ENXIO; 169 int rid; 170 #ifdef ATH_EEPROM_FIRMWARE 171 const struct firmware *fw = NULL; 172 const char *buf; 173 #endif 174 const struct pci_device_table *pd; 175 176 sc->sc_dev = dev; 177 178 /* Do this lookup anyway; figure out what to do with it later */ 179 pd = PCI_MATCH(dev, ath_pci_id_table); 180 if (pd) 181 sc->sc_pci_devinfo = pd->driver_data; 182 183 /* 184 * Enable bus mastering. 185 */ 186 pci_enable_busmaster(dev); 187 188 /* 189 * Setup other PCI bus configuration parameters. 190 */ 191 ath_pci_setup(dev); 192 193 /* 194 * Setup memory-mapping of PCI registers. 195 */ 196 rid = BS_BAR; 197 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 198 RF_ACTIVE); 199 if (psc->sc_sr == NULL) { 200 device_printf(dev, "cannot map register space\n"); 201 goto bad; 202 } 203 sc->sc_st = (HAL_BUS_TAG) rman_get_bustag(psc->sc_sr); 204 sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr); 205 /* 206 * Mark device invalid so any interrupts (shared or otherwise) 207 * that arrive before the HAL is setup are discarded. 208 */ 209 sc->sc_invalid = 1; 210 211 ATH_LOCK_INIT(sc); 212 ATH_PCU_LOCK_INIT(sc); 213 ATH_RX_LOCK_INIT(sc); 214 ATH_TX_LOCK_INIT(sc); 215 ATH_TXSTATUS_LOCK_INIT(sc); 216 217 /* 218 * Arrange interrupt line. 219 */ 220 rid = 0; 221 psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 222 RF_SHAREABLE|RF_ACTIVE); 223 if (psc->sc_irq == NULL) { 224 device_printf(dev, "could not map interrupt\n"); 225 goto bad1; 226 } 227 if (bus_setup_intr(dev, psc->sc_irq, 228 INTR_TYPE_NET | INTR_MPSAFE, 229 NULL, ath_intr, sc, &psc->sc_ih)) { 230 device_printf(dev, "could not establish interrupt\n"); 231 goto bad2; 232 } 233 234 /* 235 * Setup DMA descriptor area. 236 */ 237 if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 238 1, 0, /* alignment, bounds */ 239 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 240 BUS_SPACE_MAXADDR, /* highaddr */ 241 NULL, NULL, /* filter, filterarg */ 242 0x3ffff, /* maxsize XXX */ 243 ATH_MAX_SCATTER, /* nsegments */ 244 0x3ffff, /* maxsegsize XXX */ 245 BUS_DMA_ALLOCNOW, /* flags */ 246 NULL, /* lockfunc */ 247 NULL, /* lockarg */ 248 &sc->sc_dmat)) { 249 device_printf(dev, "cannot allocate DMA tag\n"); 250 goto bad3; 251 } 252 253 #ifdef ATH_EEPROM_FIRMWARE 254 /* 255 * If there's an EEPROM firmware image, load that in. 256 */ 257 if (resource_string_value(device_get_name(dev), device_get_unit(dev), 258 "eeprom_firmware", &buf) == 0) { 259 if (bootverbose) 260 device_printf(dev, "%s: looking up firmware @ '%s'\n", 261 __func__, buf); 262 263 fw = firmware_get(buf); 264 if (fw == NULL) { 265 device_printf(dev, "%s: couldn't find firmware\n", 266 __func__); 267 goto bad4; 268 } 269 270 device_printf(dev, "%s: EEPROM firmware @ %p\n", 271 __func__, fw->data); 272 sc->sc_eepromdata = 273 malloc(fw->datasize, M_TEMP, M_WAITOK | M_ZERO); 274 if (! sc->sc_eepromdata) { 275 device_printf(dev, "%s: can't malloc eepromdata\n", 276 __func__); 277 goto bad4; 278 } 279 memcpy(sc->sc_eepromdata, fw->data, fw->datasize); 280 firmware_put(fw, 0); 281 } 282 #endif /* ATH_EEPROM_FIRMWARE */ 283 284 error = ath_attach(pci_get_device(dev), sc); 285 if (error == 0) /* success */ 286 return 0; 287 288 #ifdef ATH_EEPROM_FIRMWARE 289 bad4: 290 #endif 291 bus_dma_tag_destroy(sc->sc_dmat); 292 bad3: 293 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 294 bad2: 295 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 296 bad1: 297 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr); 298 299 ATH_TXSTATUS_LOCK_DESTROY(sc); 300 ATH_PCU_LOCK_DESTROY(sc); 301 ATH_RX_LOCK_DESTROY(sc); 302 ATH_TX_LOCK_DESTROY(sc); 303 ATH_LOCK_DESTROY(sc); 304 305 bad: 306 return (error); 307 } 308 309 static int 310 ath_pci_detach(device_t dev) 311 { 312 struct ath_pci_softc *psc = device_get_softc(dev); 313 struct ath_softc *sc = &psc->sc_sc; 314 315 /* check if device was removed */ 316 sc->sc_invalid = !bus_child_present(dev); 317 318 /* 319 * Do a config read to clear pre-existing pci error status. 320 */ 321 (void) pci_read_config(dev, PCIR_COMMAND, 4); 322 323 ath_detach(sc); 324 325 bus_generic_detach(dev); 326 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 327 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 328 329 bus_dma_tag_destroy(sc->sc_dmat); 330 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr); 331 332 if (sc->sc_eepromdata) 333 free(sc->sc_eepromdata, M_TEMP); 334 335 ATH_TXSTATUS_LOCK_DESTROY(sc); 336 ATH_PCU_LOCK_DESTROY(sc); 337 ATH_RX_LOCK_DESTROY(sc); 338 ATH_TX_LOCK_DESTROY(sc); 339 ATH_LOCK_DESTROY(sc); 340 341 return (0); 342 } 343 344 static int 345 ath_pci_shutdown(device_t dev) 346 { 347 struct ath_pci_softc *psc = device_get_softc(dev); 348 349 ath_shutdown(&psc->sc_sc); 350 return (0); 351 } 352 353 static int 354 ath_pci_suspend(device_t dev) 355 { 356 struct ath_pci_softc *psc = device_get_softc(dev); 357 358 ath_suspend(&psc->sc_sc); 359 360 return (0); 361 } 362 363 static int 364 ath_pci_resume(device_t dev) 365 { 366 struct ath_pci_softc *psc = device_get_softc(dev); 367 368 /* 369 * Suspend/resume resets the PCI configuration space. 370 */ 371 ath_pci_setup(dev); 372 373 ath_resume(&psc->sc_sc); 374 375 return (0); 376 } 377 378 static device_method_t ath_pci_methods[] = { 379 /* Device interface */ 380 DEVMETHOD(device_probe, ath_pci_probe), 381 DEVMETHOD(device_attach, ath_pci_attach), 382 DEVMETHOD(device_detach, ath_pci_detach), 383 DEVMETHOD(device_shutdown, ath_pci_shutdown), 384 DEVMETHOD(device_suspend, ath_pci_suspend), 385 DEVMETHOD(device_resume, ath_pci_resume), 386 { 0,0 } 387 }; 388 389 static driver_t ath_pci_driver = { 390 "ath", 391 ath_pci_methods, 392 sizeof (struct ath_pci_softc) 393 }; 394 395 DRIVER_MODULE(if_ath_pci, pci, ath_pci_driver, 0, 0); 396 MODULE_VERSION(if_ath_pci, 1); 397 MODULE_DEPEND(if_ath_pci, wlan, 1, 1, 1); /* 802.11 media layer */ 398 MODULE_DEPEND(if_ath_pci, ath_main, 1, 1, 1); /* if_ath driver */ 399 MODULE_DEPEND(if_ath_pci, ath_hal, 1, 1, 1); /* ath HAL */ 400