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if_ath_cardbus.c revision 1.45 
      1 /*	$NetBSD: if_ath_cardbus.c,v 1.45 2011/10/07 20:47:42 dyoung Exp $ */
      2 /*
      3  * Copyright (c) 2003
      4  *	Ichiro FUKUHARA <ichiro (at) ichiro.org>.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
     20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 /*
     29  * CardBus bus front-end for the AR5001 Wireless LAN 802.11a/b/g CardBus.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: if_ath_cardbus.c,v 1.45 2011/10/07 20:47:42 dyoung Exp $");
     34 
     35 #include "opt_inet.h"
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/mbuf.h>
     40 #include <sys/malloc.h>
     41 #include <sys/kernel.h>
     42 #include <sys/socket.h>
     43 #include <sys/ioctl.h>
     44 #include <sys/errno.h>
     45 #include <sys/device.h>
     46 
     47 #include <machine/endian.h>
     48 
     49 #include <net/if.h>
     50 #include <net/if_dl.h>
     51 #include <net/if_media.h>
     52 #include <net/if_ether.h>
     53 
     54 #include <net80211/ieee80211_netbsd.h>
     55 #include <net80211/ieee80211_var.h>
     56 
     57 #ifdef INET
     58 #include <netinet/in.h>
     59 #include <netinet/if_inarp.h>
     60 #endif
     61 
     62 
     63 #include <sys/bus.h>
     64 #include <sys/intr.h>
     65 
     66 #include <dev/mii/miivar.h>
     67 #include <dev/mii/mii_bitbang.h>
     68 
     69 #include <dev/ic/ath_netbsd.h>
     70 #include <dev/ic/athvar.h>
     71 
     72 #include <external/isc/atheros_hal/dist/ah.h>
     73 
     74 #include <dev/pci/pcivar.h>
     75 #include <dev/pci/pcireg.h>
     76 #include <dev/pci/pcidevs.h>
     77 
     78 #include <dev/cardbus/cardbusvar.h>
     79 #include <dev/pci/pcidevs.h>
     80 
     81 /*
     82  * PCI configuration space registers
     83  */
     84 #define ATH_PCI_MMBA PCI_BAR(0)	/* memory mapped base */
     85 
     86 struct ath_cardbus_softc {
     87 	struct ath_softc	sc_ath;
     88 
     89 	/* CardBus-specific goo. */
     90 	void	*sc_ih;			/* interrupt handle */
     91 	cardbus_devfunc_t sc_ct;	/* our CardBus devfuncs */
     92 	pcitag_t sc_tag;		/* our CardBus tag */
     93 	bus_size_t sc_mapsize;		/* the size of mapped bus space region */
     94 
     95 	pcireg_t sc_bar_val;		/* value of the BAR */
     96 
     97 	bus_space_tag_t sc_iot;
     98 	bus_space_handle_t sc_ioh;
     99 };
    100 
    101 int	ath_cardbus_match(device_t, cfdata_t, void *);
    102 void	ath_cardbus_attach(device_t, device_t, void *);
    103 int	ath_cardbus_detach(device_t, int);
    104 
    105 CFATTACH_DECL_NEW(ath_cardbus, sizeof(struct ath_cardbus_softc),
    106     ath_cardbus_match, ath_cardbus_attach, ath_cardbus_detach, NULL);
    107 
    108 void	ath_cardbus_setup(struct ath_cardbus_softc *);
    109 
    110 static bool
    111 ath_cardbus_suspend(device_t self, const pmf_qual_t *qual)
    112 {
    113 	struct ath_cardbus_softc *csc = device_private(self);
    114 
    115 	ath_suspend(&csc->sc_ath);
    116 	if (csc->sc_ih != NULL) {
    117 		Cardbus_intr_disestablish(csc->sc_ct, csc->sc_ih);
    118 		csc->sc_ih = NULL;
    119 	}
    120 	return true;
    121 }
    122 
    123 static bool
    124 ath_cardbus_resume(device_t self, const pmf_qual_t *qual)
    125 {
    126 	struct ath_cardbus_softc *csc = device_private(self);
    127 
    128 	csc->sc_ih = Cardbus_intr_establish(csc->sc_ct,
    129 	    IPL_NET, ath_intr, &csc->sc_ath);
    130 
    131 	if (csc->sc_ih == NULL) {
    132 		aprint_error_dev(self,
    133 		    "unable to establish interrupt\n");
    134 		return false;
    135 	}
    136 
    137 	return ath_resume(&csc->sc_ath);
    138 }
    139 
    140 int
    141 ath_cardbus_match(device_t parent, cfdata_t match, void *aux)
    142 {
    143 	struct cardbus_attach_args *ca = aux;
    144 	const char *devname;
    145 
    146 	devname = ath_hal_probe(PCI_VENDOR(ca->ca_id), PCI_PRODUCT(ca->ca_id));
    147 
    148 	if (devname)
    149 		return 1;
    150 
    151 	return 0;
    152 }
    153 
    154 void
    155 ath_cardbus_attach(device_t parent, device_t self, void *aux)
    156 {
    157 	struct ath_cardbus_softc *csc = device_private(self);
    158 	struct ath_softc *sc = &csc->sc_ath;
    159 	struct cardbus_attach_args *ca = aux;
    160 	cardbus_devfunc_t ct = ca->ca_ct;
    161 	bus_addr_t adr;
    162 
    163 	sc->sc_dev = self;
    164 	sc->sc_dmat = ca->ca_dmat;
    165 	csc->sc_ct = ct;
    166 	csc->sc_tag = ca->ca_tag;
    167 
    168 	aprint_normal("\n");
    169 
    170 	/*
    171 	 * Map the device.
    172 	 */
    173 	if (Cardbus_mapreg_map(ct, ATH_PCI_MMBA, PCI_MAPREG_TYPE_MEM, 0,
    174 	    &csc->sc_iot, &csc->sc_ioh, &adr, &csc->sc_mapsize) == 0) {
    175 		csc->sc_bar_val = adr | PCI_MAPREG_TYPE_MEM;
    176 	} else {
    177 		aprint_error_dev(self, "unable to map device registers\n");
    178 		return;
    179 	}
    180 
    181 	sc->sc_st = HALTAG(csc->sc_iot);
    182 	sc->sc_sh = HALHANDLE(csc->sc_ioh);
    183 
    184 	/*
    185 	 * Set up the PCI configuration registers.
    186 	 */
    187 	ath_cardbus_setup(csc);
    188 
    189 	/*
    190 	 * Finish off the attach.
    191 	 */
    192 	if (ath_attach(PCI_PRODUCT(ca->ca_id), sc) != 0)
    193 		return;
    194 
    195 	if (pmf_device_register(self,
    196 	    ath_cardbus_suspend, ath_cardbus_resume)) {
    197 		pmf_class_network_register(self, &sc->sc_if);
    198 		pmf_device_suspend(self, &sc->sc_qual);
    199 	} else
    200 		aprint_error_dev(self, "couldn't establish power handler\n");
    201 }
    202 
    203 int
    204 ath_cardbus_detach(device_t self, int flags)
    205 {
    206 	struct ath_cardbus_softc *csc = device_private(self);
    207 	struct ath_softc *sc = &csc->sc_ath;
    208 	struct cardbus_devfunc *ct = csc->sc_ct;
    209 	int rv;
    210 
    211 #if defined(DIAGNOSTIC)
    212 	if (ct == NULL)
    213 		panic("%s: data structure lacks", device_xname(sc->sc_dev));
    214 #endif
    215 
    216 	rv = ath_detach(sc);
    217 	if (rv)
    218 		return (rv);
    219 
    220 	pmf_device_deregister(self);
    221 
    222 	/*
    223 	 * Unhook the interrupt handler.
    224 	 */
    225 	if (csc->sc_ih != NULL) {
    226 		Cardbus_intr_disestablish(ct, csc->sc_ih);
    227 		csc->sc_ih = NULL;
    228 	}
    229 
    230 	/*
    231 	 * Release bus space and close window.
    232 	 */
    233 	Cardbus_mapreg_unmap(ct, ATH_PCI_MMBA, csc->sc_iot, csc->sc_ioh,
    234 	    csc->sc_mapsize);
    235 
    236 	return (0);
    237 }
    238 
    239 void
    240 ath_cardbus_setup(struct ath_cardbus_softc *csc)
    241 {
    242 	cardbus_devfunc_t ct = csc->sc_ct;
    243 	int rc;
    244 	pcireg_t reg;
    245 
    246 	if ((rc = cardbus_set_powerstate(ct, csc->sc_tag, PCI_PWR_D0)) != 0)
    247 		aprint_debug("%s: cardbus_set_powerstate %d\n", __func__, rc);
    248 
    249 	/* Program the BAR. */
    250 	Cardbus_conf_write(ct, csc->sc_tag, ATH_PCI_MMBA, csc->sc_bar_val);
    251 
    252 	/* Enable the appropriate bits in the PCI CSR. */
    253 	reg = Cardbus_conf_read(ct, csc->sc_tag,
    254 	    PCI_COMMAND_STATUS_REG);
    255 	reg |= PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_MEM_ENABLE;
    256 	Cardbus_conf_write(ct, csc->sc_tag, PCI_COMMAND_STATUS_REG, reg);
    257 }
    258