if_ath_ahb.c

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    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 
   72 struct 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 
   83 static int
   84 ath_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 
   98 static int
   99 ath_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);
  200 bad3:
  201         bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
  202 bad2:
  203         bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
  204 bad1:
  205         bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_eeprom);
  206 bad0:
  207         bus_release_resource(dev, SYS_RES_MEMORY, 0, psc->sc_sr);
  208 bad:
  209         /* XXX?! */
  210         if (sc->sc_eepromdata)
  211                 free(sc->sc_eepromdata, M_TEMP);
  212         return (error);
  213 }
  214 
  215 static int
  216 ath_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 
  242 static int
  243 ath_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 
  251 static int
  252 ath_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 
  261 static int
  262 ath_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 
  271 static 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 };
  282 static driver_t ath_ahb_driver = {
  283         "ath",
  284         ath_ahb_methods,
  285         sizeof (struct ath_ahb_softc)
  286 };
  287 static  devclass_t ath_devclass;
  288 DRIVER_MODULE(ath, nexus, ath_ahb_driver, ath_devclass, 0, 0);
  289 MODULE_VERSION(ath, 1);
  290 MODULE_DEPEND(ath, wlan, 1, 1, 1);              /* 802.11 media layer */
  291 MODULE_DEPEND(ath, if_ath, 1, 1, 1);            /* if_ath driver */
Cache object: c45b5526d99501cd4acb23c60a8e276a
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FreeBSD/Linux Kernel Cross Reference sys/dev/ath/if_ath_ahb.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ath/if_ath_ahb.c
