if_ath_ahb.c revision 220185
1220185Sadrian/*- 2220185Sadrian * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 3220185Sadrian * Copyright (c) 2010-2011 Adrian Chadd, Xenion Pty Ltd 4220185Sadrian * All rights reserved. 5220185Sadrian * 6220185Sadrian * Redistribution and use in source and binary forms, with or without 7220185Sadrian * modification, are permitted provided that the following conditions 8220185Sadrian * are met: 9220185Sadrian * 1. Redistributions of source code must retain the above copyright 10220185Sadrian * notice, this list of conditions and the following disclaimer, 11220185Sadrian * without modification. 12220185Sadrian * 2. Redistributions in binary form must reproduce at minimum a disclaimer 13220185Sadrian * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 14220185Sadrian * redistribution must be conditioned upon including a substantially 15220185Sadrian * similar Disclaimer requirement for further binary redistribution. 16220185Sadrian * 17220185Sadrian * NO WARRANTY 18220185Sadrian * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19220185Sadrian * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20220185Sadrian * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 21220185Sadrian * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 22220185Sadrian * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 23220185Sadrian * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24220185Sadrian * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25220185Sadrian * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 26220185Sadrian * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27220185Sadrian * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28220185Sadrian * THE POSSIBILITY OF SUCH DAMAGES. 29220185Sadrian */ 30220185Sadrian 31220185Sadrian#include <sys/cdefs.h> 32220185Sadrian__FBSDID("$FreeBSD: head/sys/dev/ath/if_ath_ahb.c 220185 2011-03-31 08:07:13Z adrian $"); 33220185Sadrian 34220185Sadrian/* 35220185Sadrian * AHB bus front-end for the Atheros Wireless LAN controller driver. 36220185Sadrian */ 37220185Sadrian 38220185Sadrian#include <sys/param.h> 39220185Sadrian#include <sys/systm.h> 40220185Sadrian#include <sys/module.h> 41220185Sadrian#include <sys/kernel.h> 42220185Sadrian#include <sys/lock.h> 43220185Sadrian#include <sys/mutex.h> 44220185Sadrian#include <sys/errno.h> 45220185Sadrian 46220185Sadrian#include <machine/bus.h> 47220185Sadrian#include <machine/resource.h> 48220185Sadrian#include <sys/bus.h> 49220185Sadrian#include <sys/rman.h> 50220185Sadrian 51220185Sadrian#include <sys/socket.h> 52220185Sadrian 53220185Sadrian#include <net/if.h> 54220185Sadrian#include <net/if_media.h> 55220185Sadrian#include <net/if_arp.h> 56220185Sadrian 57220185Sadrian#include <net80211/ieee80211_var.h> 58220185Sadrian 59220185Sadrian#include <dev/ath/if_athvar.h> 60220185Sadrian 61220185Sadrian#include <mips/atheros/ar71xxreg.h> 62220185Sadrian#include <mips/atheros/ar91xxreg.h> 63220185Sadrian#include <mips/atheros/ar71xx_cpudef.h> 64220185Sadrian 65220185Sadrian/* 66220185Sadrian * bus glue. 67220185Sadrian */ 68220185Sadrian 69220185Sadrian/* number of 16 bit words */ 70220185Sadrian#define ATH_EEPROM_DATA_SIZE 2048 71220185Sadrian 72220185Sadrianstruct ath_ahb_softc { 73220185Sadrian struct ath_softc sc_sc; 74220185Sadrian struct resource *sc_sr; /* memory resource */ 75220185Sadrian struct resource *sc_irq; /* irq resource */ 76220185Sadrian struct resource *sc_eeprom; /* eeprom location */ 77220185Sadrian void *sc_ih; /* interrupt handler */ 78220185Sadrian}; 79220185Sadrian 80220185Sadrian#define VENDOR_ATHEROS 0x168c 81220185Sadrian#define AR9100_DEVID 0x000b 82220185Sadrian 83220185Sadrianstatic int 84220185Sadrianath_ahb_probe(device_t dev) 85220185Sadrian{ 86220185Sadrian const char* devname; 87220185Sadrian 88220185Sadrian /* Atheros / ar9100 */ 89220185Sadrian devname = ath_hal_probe(VENDOR_ATHEROS, AR9100_DEVID); 90220185Sadrian 91220185Sadrian if (devname != NULL) { 92220185Sadrian device_set_desc(dev, devname); 93220185Sadrian return BUS_PROBE_DEFAULT; 94220185Sadrian } 95220185Sadrian return ENXIO; 96220185Sadrian} 97220185Sadrian 98220185Sadrianstatic int 99220185Sadrianath_ahb_attach(device_t dev) 100220185Sadrian{ 101220185Sadrian struct ath_ahb_softc *psc = device_get_softc(dev); 102220185Sadrian struct ath_softc *sc = &psc->sc_sc; 103220185Sadrian int error = ENXIO; 104220185Sadrian int rid; 105220185Sadrian long eepromaddr; 106220185Sadrian uint8_t *p; 107220185Sadrian 108220185Sadrian sc->sc_dev = dev; 109220185Sadrian 110220185Sadrian rid = 0; 111220185Sadrian psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 112220185Sadrian if (psc->sc_sr == NULL) { 113220185Sadrian device_printf(dev, "cannot map register space\n"); 114220185Sadrian goto bad; 115220185Sadrian } 116220185Sadrian 117220185Sadrian if (resource_long_value(device_get_name(dev), device_get_unit(dev), 118220185Sadrian "eepromaddr", &eepromaddr) != 0) { 119220185Sadrian device_printf(dev, "cannot fetch 'eepromaddr' from hints\n"); 120220185Sadrian goto bad0; 121220185Sadrian } 122220185Sadrian rid = 0; 123220185Sadrian device_printf(sc->sc_dev, "eeprom @ %p\n", (void *) eepromaddr); 124220185Sadrian psc->sc_eeprom = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, (uintptr_t) eepromaddr, 125220185Sadrian (uintptr_t) eepromaddr + (uintptr_t) ((ATH_EEPROM_DATA_SIZE * 2) - 1), 0, RF_ACTIVE); 126220185Sadrian if (psc->sc_sr == NULL) { 127220185Sadrian device_printf(dev, "cannot map eeprom space\n"); 128220185Sadrian goto bad0; 129220185Sadrian } 130220185Sadrian 131220185Sadrian /* XXX uintptr_t is a bandaid for ia64; to be fixed */ 132220185Sadrian sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr); 133220185Sadrian sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr); 134220185Sadrian /* 135220185Sadrian * Mark device invalid so any interrupts (shared or otherwise) 136220185Sadrian * that arrive before the HAL is setup are discarded. 137220185Sadrian */ 138220185Sadrian sc->sc_invalid = 1; 139220185Sadrian 140220185Sadrian /* Copy the EEPROM data out */ 141220185Sadrian sc->sc_eepromdata = malloc(ATH_EEPROM_DATA_SIZE * 2, M_TEMP, M_NOWAIT | M_ZERO); 142220185Sadrian device_printf(sc->sc_dev, "eeprom data @ %p\n", (void *) rman_get_bushandle(psc->sc_eeprom)); 143220185Sadrian /* XXX why doesn't this work? -adrian */ 144220185Sadrian#if 0 145220185Sadrian bus_space_read_multi_1( 146220185Sadrian rman_get_bustag(psc->sc_eeprom), 147220185Sadrian rman_get_bushandle(psc->sc_eeprom), 148220185Sadrian 0, (u_int8_t *) sc->sc_eepromdata, ATH_EEPROM_DATA_SIZE * 2); 149220185Sadrian#endif 150220185Sadrian p = (void *) rman_get_bushandle(psc->sc_eeprom); 151220185Sadrian memcpy(sc->sc_eepromdata, p, ATH_EEPROM_DATA_SIZE * 2); 152220185Sadrian 153220185Sadrian /* 154220185Sadrian * Arrange interrupt line. 155220185Sadrian */ 156220185Sadrian rid = 0; 157220185Sadrian psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE|RF_ACTIVE); 158220185Sadrian if (psc->sc_irq == NULL) { 159220185Sadrian device_printf(dev, "could not map interrupt\n"); 160220185Sadrian goto bad1; 161220185Sadrian } 162220185Sadrian if (bus_setup_intr(dev, psc->sc_irq, 163220185Sadrian INTR_TYPE_NET | INTR_MPSAFE, 164220185Sadrian NULL, ath_intr, sc, &psc->sc_ih)) { 165220185Sadrian device_printf(dev, "could not establish interrupt\n"); 166220185Sadrian goto bad2; 167220185Sadrian } 168220185Sadrian 169220185Sadrian /* 170220185Sadrian * Setup DMA descriptor area. 171220185Sadrian */ 172220185Sadrian if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 173220185Sadrian 1, 0, /* alignment, bounds */ 174220185Sadrian BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 175220185Sadrian BUS_SPACE_MAXADDR, /* highaddr */ 176220185Sadrian NULL, NULL, /* filter, filterarg */ 177220185Sadrian 0x3ffff, /* maxsize XXX */ 178220185Sadrian ATH_MAX_SCATTER, /* nsegments */ 179220185Sadrian 0x3ffff, /* maxsegsize XXX */ 180220185Sadrian BUS_DMA_ALLOCNOW, /* flags */ 181220185Sadrian NULL, /* lockfunc */ 182220185Sadrian NULL, /* lockarg */ 183220185Sadrian &sc->sc_dmat)) { 184220185Sadrian device_printf(dev, "cannot allocate DMA tag\n"); 185220185Sadrian goto bad3; 186220185Sadrian } 187220185Sadrian 188220185Sadrian ATH_LOCK_INIT(sc); 189220185Sadrian 190220185Sadrian error = ath_attach(AR9100_DEVID, sc); 191220185Sadrian if (error == 0) /* success */ 192220185Sadrian return 0; 193220185Sadrian 194220185Sadrian ATH_LOCK_DESTROY(sc); 195220185Sadrian bus_dma_tag_destroy(sc->sc_dmat); 196220185Sadrianbad3: 197220185Sadrian bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 198220185Sadrianbad2: 199220185Sadrian bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 200220185Sadrianbad1: 201220185Sadrian bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom); 202220185Sadrianbad0: 203220185Sadrian bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr); 204220185Sadrianbad: 205220185Sadrian /* XXX?! */ 206220185Sadrian if (sc->sc_eepromdata) 207220185Sadrian free(sc->sc_eepromdata, M_TEMP); 208220185Sadrian return (error); 209220185Sadrian} 210220185Sadrian 211220185Sadrianstatic int 212220185Sadrianath_ahb_detach(device_t dev) 213220185Sadrian{ 214220185Sadrian struct ath_ahb_softc *psc = device_get_softc(dev); 215220185Sadrian struct ath_softc *sc = &psc->sc_sc; 216220185Sadrian 217220185Sadrian /* check if device was removed */ 218220185Sadrian sc->sc_invalid = !bus_child_present(dev); 219220185Sadrian 220220185Sadrian ath_detach(sc); 221220185Sadrian 222220185Sadrian bus_generic_detach(dev); 223220185Sadrian bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); 224220185Sadrian bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); 225220185Sadrian 226220185Sadrian bus_dma_tag_destroy(sc->sc_dmat); 227220185Sadrian bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr); 228220185Sadrian bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom); 229220185Sadrian /* XXX?! */ 230220185Sadrian if (sc->sc_eepromdata) 231220185Sadrian free(sc->sc_eepromdata, M_TEMP); 232220185Sadrian 233220185Sadrian ATH_LOCK_DESTROY(sc); 234220185Sadrian 235220185Sadrian return (0); 236220185Sadrian} 237220185Sadrian 238220185Sadrianstatic int 239220185Sadrianath_ahb_shutdown(device_t dev) 240220185Sadrian{ 241220185Sadrian struct ath_ahb_softc *psc = device_get_softc(dev); 242220185Sadrian 243220185Sadrian ath_shutdown(&psc->sc_sc); 244220185Sadrian return (0); 245220185Sadrian} 246220185Sadrian 247220185Sadrianstatic int 248220185Sadrianath_ahb_suspend(device_t dev) 249220185Sadrian{ 250220185Sadrian struct ath_ahb_softc *psc = device_get_softc(dev); 251220185Sadrian 252220185Sadrian ath_suspend(&psc->sc_sc); 253220185Sadrian 254220185Sadrian return (0); 255220185Sadrian} 256220185Sadrian 257220185Sadrianstatic int 258220185Sadrianath_ahb_resume(device_t dev) 259220185Sadrian{ 260220185Sadrian struct ath_ahb_softc *psc = device_get_softc(dev); 261220185Sadrian 262220185Sadrian ath_resume(&psc->sc_sc); 263220185Sadrian 264220185Sadrian return (0); 265220185Sadrian} 266220185Sadrian 267220185Sadrianstatic device_method_t ath_ahb_methods[] = { 268220185Sadrian /* Device interface */ 269220185Sadrian DEVMETHOD(device_probe, ath_ahb_probe), 270220185Sadrian DEVMETHOD(device_attach, ath_ahb_attach), 271220185Sadrian DEVMETHOD(device_detach, ath_ahb_detach), 272220185Sadrian DEVMETHOD(device_shutdown, ath_ahb_shutdown), 273220185Sadrian DEVMETHOD(device_suspend, ath_ahb_suspend), 274220185Sadrian DEVMETHOD(device_resume, ath_ahb_resume), 275220185Sadrian 276220185Sadrian { 0,0 } 277220185Sadrian}; 278220185Sadrianstatic driver_t ath_ahb_driver = { 279220185Sadrian "ath", 280220185Sadrian ath_ahb_methods, 281220185Sadrian sizeof (struct ath_ahb_softc) 282220185Sadrian}; 283220185Sadrianstatic devclass_t ath_devclass; 284220185SadrianDRIVER_MODULE(ath, nexus, ath_ahb_driver, ath_devclass, 0, 0); 285220185SadrianMODULE_VERSION(ath, 1); 286220185SadrianMODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */ 287220185SadrianMODULE_DEPEND(ath, if_ath, 1, 1, 1); /* if_ath driver */ 288