1/*- 2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 3 * Copyright (c) 2010-2011 Adrian Chadd, Xenion Pty Ltd 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer, 11 * without modification. 12 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 13 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 14 * redistribution must be conditioned upon including a substantially 15 * similar Disclaimer requirement for further binary redistribution. 16 * 17 * NO WARRANTY 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 21 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 23 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 26 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGES. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD$"); 33 34/* 35 * AHB bus front-end for the Atheros Wireless LAN controller driver. 36 */ 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/module.h> 41#include <sys/kernel.h> 42#include <sys/lock.h> 43#include <sys/mutex.h> 44#include <sys/errno.h> 45 46#include <machine/bus.h> 47#include <machine/resource.h> 48#include <sys/bus.h> 49#include <sys/rman.h> 50 51#include <sys/socket.h> 52 53#include <net/if.h> 54#include <net/if_media.h> 55#include <net/if_arp.h> 56 57#include <net80211/ieee80211_var.h> 58 59#include <dev/ath/if_athvar.h> 60 61#include <mips/atheros/ar71xxreg.h> 62#include <mips/atheros/ar91xxreg.h> 63#include <mips/atheros/ar71xx_cpudef.h> 64 65/* 66 * bus glue. 67 */ 68 69/* number of 16 bit words */ 70#define ATH_EEPROM_DATA_SIZE 2048 71 72struct ath_ahb_softc { 73 struct ath_softc sc_sc; 74 struct resource *sc_sr; /* memory resource */ 75 struct resource *sc_irq; /* irq resource */ 76 struct resource *sc_eeprom; /* eeprom location */ 77 void *sc_ih; /* interrupt handler */ 78}; 79 80#define VENDOR_ATHEROS 0x168c 81#define AR9130_DEVID 0x000b 82 83static int 84ath_ahb_probe(device_t dev) 85{ 86 const char* devname; 87 88 /* Atheros / ar9130 */ 89 devname = ath_hal_probe(VENDOR_ATHEROS, AR9130_DEVID); 90 91 if (devname != NULL) { 92 device_set_desc(dev, devname); 93 return BUS_PROBE_DEFAULT; 94 } 95 return ENXIO; 96} 97 98static int 99ath_ahb_attach(device_t dev) 100{ 101 struct ath_ahb_softc *psc = device_get_softc(dev); 102 struct ath_softc *sc = &psc->sc_sc; 103 int error = ENXIO; 104 int rid; 105 long eepromaddr; 106 uint8_t *p; 107 108 sc->sc_dev = dev; 109 110 rid = 0; 111 psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 112 if (psc->sc_sr == NULL) { 113 device_printf(dev, "cannot map register space\n"); 114 goto bad; 115 } 116 117 if (resource_long_value(device_get_name(dev), device_get_unit(dev), 118 "eepromaddr", &eepromaddr) != 0) { 119 device_printf(dev, "cannot fetch 'eepromaddr' from hints\n"); 120 goto bad0; 121 } 122 rid = 0; 123 device_printf(sc->sc_dev, "eeprom @ %p\n", (void *) eepromaddr); 124 psc->sc_eeprom = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, (uintptr_t) eepromaddr, 125 (uintptr_t) eepromaddr + (uintptr_t) ((ATH_EEPROM_DATA_SIZE * 2) - 1), 0, RF_ACTIVE); 126 if (psc->sc_eeprom == NULL) { 127 device_printf(dev, "cannot map eeprom space\n"); 128 goto bad0; 129 } 130 131 /* XXX uintptr_t is a bandaid for ia64; to be fixed */ 132 sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr); 133 sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr); 134 /* 135 * Mark device invalid so any interrupts (shared or otherwise) 136 * that arrive before the HAL is setup are discarded. 137 */ 138 sc->sc_invalid = 1; 139 140 /* Copy the EEPROM data out */ 141 sc->sc_eepromdata = malloc(ATH_EEPROM_DATA_SIZE * 2, M_TEMP, M_NOWAIT | M_ZERO); 142 if (sc->sc_eepromdata == NULL) { 143 device_printf(dev, "cannot allocate memory for eeprom data\n"); 144 goto bad1; 145 } 146 device_printf(sc->sc_dev, "eeprom data @ %p\n", (void *) rman_get_bushandle(psc->sc_eeprom)); 147 /* XXX why doesn't this work? -adrian */ 148#if 0 149 bus_space_read_multi_1( 150 rman_get_bustag(psc->sc_eeprom), 151 rman_get_bushandle(psc->sc_eeprom), 152 0, (u_int8_t *) sc->sc_eepromdata, ATH_EEPROM_DATA_SIZE * 2); 153#endif 154 p = (void *) rman_get_bushandle(psc->sc_eeprom); 155 memcpy(sc->sc_eepromdata, p, ATH_EEPROM_DATA_SIZE * 2); 156 157 /* 158 * Arrange interrupt line. 159 */ 160 rid = 0; 161 psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE|RF_ACTIVE); 162 if (psc->sc_irq == NULL) { 163 device_printf(dev, "could not map interrupt\n"); 164 goto bad1; 165 } 166 if (bus_setup_intr(dev, psc->sc_irq, 167 INTR_TYPE_NET | INTR_MPSAFE, 168 NULL, ath_intr, sc, &psc->sc_ih)) { 169 device_printf(dev, "could not establish interrupt\n"); 170 goto bad2; 171 } 172 173 /* 174 * Setup DMA descriptor area. 175 */ 176 if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 177 1, 0, /* alignment, bounds */ 178 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 179 BUS_SPACE_MAXADDR, /* highaddr */ 180 NULL, NULL, /* filter, filterarg */ 181 0x3ffff, /* maxsize XXX */ 182 ATH_MAX_SCATTER, /* nsegments */ 183 0x3ffff, /* maxsegsize XXX */ 184 BUS_DMA_ALLOCNOW, /* flags */ 185 NULL, /* lockfunc */ 186 NULL, /* lockarg */ 187 &sc->sc_dmat)) { 188 device_printf(dev, "cannot allocate DMA tag\n"); 189 goto bad3; 190 } 191 192 ATH_LOCK_INIT(sc); 193 194 error = ath_attach(AR9130_DEVID, sc); 195 if (error == 0) /* success */ 196 return 0; 197 198 ATH_LOCK_DESTROY(sc); 199 bus_dma_tag_destroy(sc->sc_dmat); 200bad3: 201 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 202bad2: 203 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 204bad1: 205 bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom); 206bad0: 207 bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr); 208bad: 209 /* XXX?! */ 210 if (sc->sc_eepromdata) 211 free(sc->sc_eepromdata, M_TEMP); 212 return (error); 213} 214 215static int 216ath_ahb_detach(device_t dev) 217{ 218 struct ath_ahb_softc *psc = device_get_softc(dev); 219 struct ath_softc *sc = &psc->sc_sc; 220 221 /* check if device was removed */ 222 sc->sc_invalid = !bus_child_present(dev); 223 224 ath_detach(sc); 225 226 bus_generic_detach(dev); 227 bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 228 bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 229 230 bus_dma_tag_destroy(sc->sc_dmat); 231 bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr); 232 bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom); 233 /* XXX?! */ 234 if (sc->sc_eepromdata) 235 free(sc->sc_eepromdata, M_TEMP); 236 237 ATH_LOCK_DESTROY(sc); 238 239 return (0); 240} 241 242static int 243ath_ahb_shutdown(device_t dev) 244{ 245 struct ath_ahb_softc *psc = device_get_softc(dev); 246 247 ath_shutdown(&psc->sc_sc); 248 return (0); 249} 250 251static int 252ath_ahb_suspend(device_t dev) 253{ 254 struct ath_ahb_softc *psc = device_get_softc(dev); 255 256 ath_suspend(&psc->sc_sc); 257 258 return (0); 259} 260 261static int 262ath_ahb_resume(device_t dev) 263{ 264 struct ath_ahb_softc *psc = device_get_softc(dev); 265 266 ath_resume(&psc->sc_sc); 267 268 return (0); 269} 270 271static device_method_t ath_ahb_methods[] = { 272 /* Device interface */ 273 DEVMETHOD(device_probe, ath_ahb_probe), 274 DEVMETHOD(device_attach, ath_ahb_attach), 275 DEVMETHOD(device_detach, ath_ahb_detach), 276 DEVMETHOD(device_shutdown, ath_ahb_shutdown), 277 DEVMETHOD(device_suspend, ath_ahb_suspend), 278 DEVMETHOD(device_resume, ath_ahb_resume), 279 280 { 0,0 } 281}; 282static driver_t ath_ahb_driver = { 283 "ath", 284 ath_ahb_methods, 285 sizeof (struct ath_ahb_softc) 286}; 287static devclass_t ath_devclass; 288DRIVER_MODULE(ath, nexus, ath_ahb_driver, ath_devclass, 0, 0); 289MODULE_VERSION(ath, 1); 290MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */ 291MODULE_DEPEND(ath, if_ath, 1, 1, 1); /* if_ath driver */ 292