1 /*- 2 * Copyright (c) 2002-2008 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 60 #include <dev/pci/pcivar.h> 61 #include <dev/pci/pcireg.h> 62 63 /* 64 * PCI glue. 65 */ 66 67 struct ath_pci_softc { 68 struct ath_softc sc_sc; 69 struct resource *sc_sr; /* memory resource */ 70 struct resource *sc_irq; /* irq resource */ 71 void *sc_ih; /* interrupt handler */ 72 }; 73 74 #define BS_BAR 0x10 75 #define PCIR_RETRY_TIMEOUT 0x41 76 77 static int 78 ath_pci_probe(device_t dev) 79 { 80 const char* devname; 81 82 devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev)); 83 if (devname != NULL) { 84 device_set_desc(dev, devname); 85 return BUS_PROBE_DEFAULT; 86 } 87 return ENXIO; 88 } 89 90 static int 91 ath_pci_attach(device_t dev) 92 { 93 struct ath_pci_softc *psc = device_get_softc(dev); 94 struct ath_softc *sc = &psc->sc_sc; 95 int error = ENXIO; 96 int rid; 97 98 sc->sc_dev = dev; 99 100 /* 101 * Enable bus mastering. 102 */ 103 pci_enable_busmaster(dev); 104 105 /* 106 * Disable retry timeout to keep PCI Tx retries from 107 * interfering with C3 CPU state. 108 */ 109 pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1); 110 111 /* 112 * Setup memory-mapping of PCI registers. 113 */ 114 rid = BS_BAR; 115 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 116 RF_ACTIVE); 117 if (psc->sc_sr == NULL) { 118 device_printf(dev, "cannot map register space\n"); 119 goto bad; 120 } 121 /* XXX uintptr_t is a bandaid for ia64; to be fixed */ 122 sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr); 123 sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr); 124 /* 125 * Mark device invalid so any interrupts (shared or otherwise) 126 * that arrive before the HAL is setup are discarded. 127 */ 128 sc->sc_invalid = 1; 129 130 /* 131 * Arrange interrupt line. 132 */ 133 rid = 0; 134 psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 135 RF_SHAREABLE|RF_ACTIVE); 136 if (psc->sc_irq == NULL) { 137 device_printf(dev, "could not map interrupt\n"); 138 goto bad1; 139 } 140 if (bus_setup_intr(dev, psc->sc_irq, 141 INTR_TYPE_NET | INTR_MPSAFE, 142 NULL, ath_intr, sc, &psc->sc_ih)) { 143 device_printf(dev, "could not establish interrupt\n"); 144 goto bad2; 145 } 146 147 /* 148 * Setup DMA descriptor area. 149 */ 150 if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 151 1, 0, /* alignment, bounds */ 152 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 153 BUS_SPACE_MAXADDR, /* highaddr */ 154 NULL, NULL, /* filter, filterarg */ 155 0x3ffff, /* maxsize XXX */ 156 ATH_MAX_SCATTER, /* nsegments */ 157 0x3ffff, /* maxsegsize XXX */ 158 BUS_DMA_ALLOCNOW, /* flags */ 159 NULL, /* lockfunc */ 160 NULL, /* lockarg */ 161 &sc->sc_dmat)) { 162 device_printf(dev, "cannot allocate DMA tag\n"); 163 goto bad3; 164 } 165 166 ATH_LOCK_INIT(sc); 167 168 error = ath_attach(pci_get_device(dev), sc); 169 if (error == 0) /* success */ 170 return 0; 171 172 ATH_LOCK_DESTROY(sc); 173 bus_dma_tag_destroy(sc->sc_dmat); 174 bad3: 175 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 176 bad2: 177 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 178 bad1: 179 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr); 180 bad: 181 return (error); 182 } 183 184 static int 185 ath_pci_detach(device_t dev) 186 { 187 struct ath_pci_softc *psc = device_get_softc(dev); 188 struct ath_softc *sc = &psc->sc_sc; 189 190 /* check if device was removed */ 191 sc->sc_invalid = !bus_child_present(dev); 192 193 ath_detach(sc); 194 195 bus_generic_detach(dev); 196 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 197 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 198 199 bus_dma_tag_destroy(sc->sc_dmat); 200 bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr); 201 202 ATH_LOCK_DESTROY(sc); 203 204 return (0); 205 } 206 207 static int 208 ath_pci_shutdown(device_t dev) 209 { 210 struct ath_pci_softc *psc = device_get_softc(dev); 211 212 ath_shutdown(&psc->sc_sc); 213 return (0); 214 } 215 216 static int 217 ath_pci_suspend(device_t dev) 218 { 219 struct ath_pci_softc *psc = device_get_softc(dev); 220 221 ath_suspend(&psc->sc_sc); 222 223 return (0); 224 } 225 226 static int 227 ath_pci_resume(device_t dev) 228 { 229 struct ath_pci_softc *psc = device_get_softc(dev); 230 231 ath_resume(&psc->sc_sc); 232 233 return (0); 234 } 235 236 static device_method_t ath_pci_methods[] = { 237 /* Device interface */ 238 DEVMETHOD(device_probe, ath_pci_probe), 239 DEVMETHOD(device_attach, ath_pci_attach), 240 DEVMETHOD(device_detach, ath_pci_detach), 241 DEVMETHOD(device_shutdown, ath_pci_shutdown), 242 DEVMETHOD(device_suspend, ath_pci_suspend), 243 DEVMETHOD(device_resume, ath_pci_resume), 244 245 { 0,0 } 246 }; 247 static driver_t ath_pci_driver = { 248 "ath", 249 ath_pci_methods, 250 sizeof (struct ath_pci_softc) 251 }; 252 static devclass_t ath_devclass; 253 DRIVER_MODULE(ath, pci, ath_pci_driver, ath_devclass, 0, 0); 254 MODULE_VERSION(ath, 1); 255 MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */ 256