1 /* 2 * Copyright (c) 2002-2005 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 * 3. Neither the names of the above-listed copyright holders nor the names 16 * of any contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * Alternatively, this software may be distributed under the terms of the 20 * GNU General Public License ("GPL") version 2 as published by the Free 21 * Software Foundation. 22 * 23 * NO WARRANTY 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 27 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 28 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 29 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 32 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 34 * THE POSSIBILITY OF SUCH DAMAGES. 35 * 36 * $FreeBSD: src/sys/dev/ath/if_ath_pci.c,v 1.12 2005/03/05 19:06:12 imp Exp $ 37 * $DragonFly: src/sys/dev/netif/ath/ath/if_ath_pci.c,v 1.1 2006/07/13 09:15:22 sephe Exp $ 38 */ 39 40 /* 41 * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/module.h> 47 #include <sys/kernel.h> 48 #include <sys/errno.h> 49 #include <sys/sysctl.h> 50 51 #include <machine/bus.h> 52 #include <machine/resource.h> 53 #include <sys/bus.h> 54 #include <sys/rman.h> 55 56 #include <sys/socket.h> 57 58 #include <net/if.h> 59 #include <net/if_media.h> 60 #include <net/if_arp.h> 61 62 #include <netproto/802_11/ieee80211_var.h> 63 64 #include <bus/pci/pcivar.h> 65 #include <bus/pci/pcireg.h> 66 67 #include <dev/netif/ath/ath/if_athvar.h> 68 #include <contrib/dev/ath/ah.h> 69 70 static int ath_pci_probe(device_t); 71 static int ath_pci_attach(device_t); 72 static int ath_pci_detach(device_t); 73 static int ath_pci_shutdown(device_t); 74 static int ath_pci_suspend(device_t); 75 static int ath_pci_resume(device_t); 76 77 static void ath_pci_setup(device_t); 78 79 /* 80 * PCI glue. 81 */ 82 83 struct ath_pci_softc { 84 struct ath_softc sc_sc; 85 struct resource *sc_sr; /* memory resource */ 86 int sc_srid; 87 }; 88 89 #define BS_BAR 0x10 90 #define PCIR_RETRY_TIMEOUT 0x41 91 92 static int 93 ath_pci_probe(device_t dev) 94 { 95 const char* devname; 96 97 devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev)); 98 if (devname != NULL) { 99 device_set_desc(dev, devname); 100 return 0; 101 } 102 return ENXIO; 103 } 104 105 static void 106 ath_pci_setup(device_t dev) 107 { 108 /* 109 * Enable memory mapping and bus mastering. 110 */ 111 pci_enable_busmaster(dev); 112 113 /* 114 * Disable retry timeout to keep PCI Tx retries from 115 * interfering with C3 CPU state. 116 */ 117 pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1); 118 } 119 120 static int 121 ath_pci_attach(device_t dev) 122 { 123 struct ath_pci_softc *psc = device_get_softc(dev); 124 struct ath_softc *sc = &psc->sc_sc; 125 int error; 126 127 sc->sc_dev = dev; 128 129 ath_pci_setup(dev); 130 131 /* 132 * Setup memory-mapping of PCI registers. 133 */ 134 psc->sc_srid = BS_BAR; 135 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &psc->sc_srid, 136 RF_ACTIVE); 137 if (psc->sc_sr == NULL) { 138 device_printf(dev, "cannot map register space\n"); 139 return ENXIO; 140 } 141 sc->sc_st = rman_get_bustag(psc->sc_sr); 142 sc->sc_sh = rman_get_bushandle(psc->sc_sr); 143 144 /* 145 * Setup DMA descriptor area. 146 */ 147 error = bus_dma_tag_create(NULL, 1, 0, 148 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 149 NULL, NULL, 0x3ffff/* maxsize XXX */, 150 ATH_MAX_SCATTER, BUS_SPACE_MAXADDR, 151 BUS_DMA_ALLOCNOW, &sc->sc_dmat); 152 if (error) { 153 device_printf(dev, "cannot allocate DMA tag\n"); 154 goto back; 155 } 156 157 error = ath_attach(pci_get_device(dev), sc); 158 159 back: 160 if (error) 161 ath_pci_detach(dev); 162 return error; 163 } 164 165 static int 166 ath_pci_detach(device_t dev) 167 { 168 struct ath_pci_softc *psc = device_get_softc(dev); 169 struct ath_softc *sc = &psc->sc_sc; 170 171 /* XXX check if device was removed */ 172 sc->sc_invalid = !bus_child_present(dev); 173 174 if (device_is_attached(dev)) 175 ath_detach(sc); 176 177 bus_generic_detach(dev); 178 179 if (sc->sc_dmat != NULL) 180 bus_dma_tag_destroy(sc->sc_dmat); 181 182 if (psc->sc_sr != NULL) { 183 bus_release_resource(dev, SYS_RES_MEMORY, psc->sc_srid, 184 psc->sc_sr); 185 } 186 return 0; 187 } 188 189 static int 190 ath_pci_shutdown(device_t dev) 191 { 192 struct ath_pci_softc *psc = device_get_softc(dev); 193 194 ath_shutdown(&psc->sc_sc); 195 return (0); 196 } 197 198 static int 199 ath_pci_suspend(device_t dev) 200 { 201 struct ath_pci_softc *psc = device_get_softc(dev); 202 203 ath_suspend(&psc->sc_sc); 204 return (0); 205 } 206 207 static int 208 ath_pci_resume(device_t dev) 209 { 210 struct ath_pci_softc *psc = device_get_softc(dev); 211 212 ath_pci_setup(dev); 213 ath_resume(&psc->sc_sc); 214 return (0); 215 } 216 217 static device_method_t ath_pci_methods[] = { 218 /* Device interface */ 219 DEVMETHOD(device_probe, ath_pci_probe), 220 DEVMETHOD(device_attach, ath_pci_attach), 221 DEVMETHOD(device_detach, ath_pci_detach), 222 DEVMETHOD(device_shutdown, ath_pci_shutdown), 223 DEVMETHOD(device_suspend, ath_pci_suspend), 224 DEVMETHOD(device_resume, ath_pci_resume), 225 226 { 0, 0 } 227 }; 228 229 static driver_t ath_pci_driver = { 230 "ath", 231 ath_pci_methods, 232 sizeof (struct ath_pci_softc) 233 }; 234 235 static devclass_t ath_devclass; 236 237 DRIVER_MODULE(if_ath, pci, ath_pci_driver, ath_devclass, 0, 0); 238 DRIVER_MODULE(if_ath, cardbus, ath_pci_driver, ath_devclass, 0, 0); 239 240 MODULE_VERSION(if_ath, 1); 241 242 MODULE_DEPEND(if_ath, ath_hal, 1, 1, 1); /* Atheros HAL */ 243 MODULE_DEPEND(if_ath, ath_rate, 1, 1, 1); /* rate control algorithm */ 244 MODULE_DEPEND(if_ath, wlan, 1, 1, 1); /* 802.11 media layer */ 245