1 /*- 2 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer, 10 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13 * redistribution must be conditioned upon including a substantially 14 * similar Disclaimer requirement for further binary redistribution. 15 * 16 * NO WARRANTY 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/module.h> 40 #include <sys/kernel.h> 41 #include <sys/lock.h> 42 #include <sys/mutex.h> 43 #include <sys/errno.h> 44 45 #include <machine/bus.h> 46 #include <machine/resource.h> 47 #include <sys/bus.h> 48 #include <sys/rman.h> 49 50 #include <sys/socket.h> 51 52 #include <net/if.h> 53 #include <net/if_media.h> 54 #include <net/if_arp.h> 55 56 #include <net80211/ieee80211_var.h> 57 58 #include <dev/ath/if_athvar.h> 59 #include <contrib/dev/ath/ah.h> 60 61 #include <dev/pci/pcivar.h> 62 #include <dev/pci/pcireg.h> 63 64 /* 65 * PCI glue. 66 */ 67 68 struct ath_pci_softc { 69 struct ath_softc sc_sc; 70 struct resource *sc_sr; /* memory resource */ 71 struct resource *sc_irq; /* irq resource */ 72 void *sc_ih; /* interrupt handler */ 73 }; 74 75 #define BS_BAR 0x10 76 #define PCIR_RETRY_TIMEOUT 0x41 77 78 static int 79 ath_pci_probe(device_t dev) 80 { 81 const char* devname; 82 83 devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev)); 84 if (devname != NULL) { 85 device_set_desc(dev, devname); 86 return BUS_PROBE_DEFAULT; 87 } 88 return ENXIO; 89 } 90 91 static int 92 ath_pci_attach(device_t dev) 93 { 94 struct ath_pci_softc *psc = device_get_softc(dev); 95 struct ath_softc *sc = &psc->sc_sc; 96 int error = ENXIO; 97 int rid; 98 99 sc->sc_dev = dev; 100 101 /* 102 * Enable bus mastering. 103 */ 104 pci_enable_busmaster(dev); 105 106 /* 107 * Disable retry timeout to keep PCI Tx retries from 108 * interfering with C3 CPU state. 109 */ 110 pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1); 111 112 /* 113 * Setup memory-mapping of PCI registers. 114 */ 115 rid = BS_BAR; 116 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 117 RF_ACTIVE); 118 if (psc->sc_sr == NULL) { 119 device_printf(dev, "cannot map register space\n"); 120 goto bad; 121 } 122 /* XXX uintptr_t is a bandaid for ia64; to be fixed */ 123 sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr); 124 sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr); 125 /* 126 * Mark device invalid so any interrupts (shared or otherwise) 127 * that arrive before the HAL is setup are discarded. 128 */ 129 sc->sc_invalid = 1; 130 131 /* 132 * Arrange interrupt line. 133 */ 134 rid = 0; 135 psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 136 RF_SHAREABLE|RF_ACTIVE); 137 if (psc->sc_irq == NULL) { 138 device_printf(dev, "could not map interrupt\n"); 139 goto bad1; 140 } 141 if (bus_setup_intr(dev, psc->sc_irq, 142 INTR_TYPE_NET | INTR_MPSAFE, 143 NULL, ath_intr, sc, &psc->sc_ih)) { 144 device_printf(dev, "could not establish interrupt\n"); 145 goto bad2; 146 } 147 148 /* 149 * Setup DMA descriptor area. 150 */ 151 if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 152 1, 0, /* alignment, bounds */ 153 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 154 BUS_SPACE_MAXADDR, /* highaddr */ 155 NULL, NULL, /* filter, filterarg */ 156 0x3ffff, /* maxsize XXX */ 157 ATH_MAX_SCATTER, /* nsegments */ 158 0x3ffff, /* maxsegsize XXX */ 159 BUS_DMA_ALLOCNOW, /* flags */ 160 NULL, /* lockfunc */ 161 NULL, /* lockarg */ 162 &sc->sc_dmat)) { 163 device_printf(dev, "cannot allocate DMA tag\n"); 164 goto bad3; 165 } 166 167 ATH_LOCK_INIT(sc); 168 169 error = ath_attach(pci_get_device(dev), sc); 170 if (error == 0) /* success */ 171 return 0; 172 173 ATH_LOCK_DESTROY(sc); 174 bus_dma_tag_destroy(sc->sc_dmat); 175 bad3: 176 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 177 bad2: 178 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 179 bad1: 180 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr); 181 bad: 182 return (error); 183 } 184 185 static int 186 ath_pci_detach(device_t dev) 187 { 188 struct ath_pci_softc *psc = device_get_softc(dev); 189 struct ath_softc *sc = &psc->sc_sc; 190 191 /* check if device was removed */ 192 sc->sc_invalid = !bus_child_present(dev); 193 194 ath_detach(sc); 195 196 bus_generic_detach(dev); 197 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 198 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 199 200 bus_dma_tag_destroy(sc->sc_dmat); 201 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr); 202 203 ATH_LOCK_DESTROY(sc); 204 205 return (0); 206 } 207 208 static int 209 ath_pci_shutdown(device_t dev) 210 { 211 struct ath_pci_softc *psc = device_get_softc(dev); 212 213 ath_shutdown(&psc->sc_sc); 214 return (0); 215 } 216 217 static int 218 ath_pci_suspend(device_t dev) 219 { 220 struct ath_pci_softc *psc = device_get_softc(dev); 221 222 ath_suspend(&psc->sc_sc); 223 224 return (0); 225 } 226 227 static int 228 ath_pci_resume(device_t dev) 229 { 230 struct ath_pci_softc *psc = device_get_softc(dev); 231 232 ath_resume(&psc->sc_sc); 233 234 return (0); 235 } 236 237 static device_method_t ath_pci_methods[] = { 238 /* Device interface */ 239 DEVMETHOD(device_probe, ath_pci_probe), 240 DEVMETHOD(device_attach, ath_pci_attach), 241 DEVMETHOD(device_detach, ath_pci_detach), 242 DEVMETHOD(device_shutdown, ath_pci_shutdown), 243 DEVMETHOD(device_suspend, ath_pci_suspend), 244 DEVMETHOD(device_resume, ath_pci_resume), 245 246 { 0,0 } 247 }; 248 static driver_t ath_pci_driver = { 249 "ath", 250 ath_pci_methods, 251 sizeof (struct ath_pci_softc) 252 }; 253 static devclass_t ath_devclass; 254 DRIVER_MODULE(if_ath, pci, ath_pci_driver, ath_devclass, 0, 0); 255 DRIVER_MODULE(if_ath, cardbus, ath_pci_driver, ath_devclass, 0, 0); 256 MODULE_VERSION(if_ath, 1); 257 MODULE_DEPEND(if_ath, ath_hal, 1, 1, 1); /* Atheros HAL */ 258 MODULE_DEPEND(if_ath, wlan, 1, 1, 1); /* 802.11 media layer */ 259 MODULE_DEPEND(if_ath, ath_rate, 1, 1, 1); /* rate control algorithm */ 260