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if_wi_pci.c revision 1.7
      1 /*      $NetBSD: if_wi_pci.c,v 1.7 2002/04/04 17:43:33 jdolecek Exp $  */
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Hideaki Imaizumi <hiddy (at) sfc.wide.ad.jp>
      9  * and Ichiro FUKUHARA (ichiro (at) ichiro.org).
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *        This product includes software developed by the NetBSD
     22  *        Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 /*
     41  * PCI bus front-end for the Intersil PCI WaveLan.
     42  * Works with Prism2.5 Mini-PCI wavelan.
     43  */
     44 
     45 #include <sys/cdefs.h>
     46 __KERNEL_RCSID(0, "$NetBSD: if_wi_pci.c,v 1.7 2002/04/04 17:43:33 jdolecek Exp $");
     47 
     48 #include <sys/param.h>
     49 #include <sys/systm.h>
     50 #include <sys/mbuf.h>
     51 #include <sys/syslog.h>
     52 #include <sys/socket.h>
     53 #include <sys/device.h>
     54 #include <sys/callout.h>
     55 
     56 #include <net/if.h>
     57 #include <net/if_ether.h>
     58 #include <net/if_media.h>
     59 #include <net/if_ieee80211.h>
     60 
     61 #include <machine/bus.h>
     62 #include <machine/intr.h>
     63 
     64 #include <dev/pci/pcireg.h>
     65 #include <dev/pci/pcivar.h>
     66 #include <dev/pci/pcidevs.h>
     67 
     68 #include <dev/ic/wi_ieee.h>
     69 #include <dev/ic/wireg.h>
     70 #include <dev/ic/wivar.h>
     71 
     72 #define WI_PCI_PLX_LOMEM	0x10	/* PLX chip membase */
     73 #define WI_PCI_PLX_LOIO		0x14	/* PLX chip iobase */
     74 #define WI_PCI_LOMEM		0x18	/* ISA membase */
     75 #define WI_PCI_LOIO		0x1C	/* ISA iobase */
     76 
     77 #define WI_PLX_COR_OFFSET       0x3E0
     78 #define WI_PLX_COR_VALUE        0x41
     79 
     80 struct wi_pci_softc {
     81 	struct wi_softc psc_wi;		/* real "wi" softc */
     82 
     83 	/* PCI-specific goo */
     84 	pci_intr_handle_t psc_ih;
     85 	struct pci_attach_args *psc_pa;
     86 
     87 	void *sc_powerhook;		/* power hook descriptor */
     88 };
     89 
     90 static int	wi_pci_match __P((struct device *, struct cfdata *, void *));
     91 static void	wi_pci_attach __P((struct device *, struct device *, void *));
     92 static int	wi_pci_enable __P((struct wi_softc *));
     93 static void	wi_pci_disable __P((struct wi_softc *));
     94 static void	wi_pci_reset __P((struct wi_softc *));
     95 static void	wi_pci_powerhook __P((int, void *));
     96 
     97 static const struct wi_pci_product
     98 	*wi_pci_lookup __P((struct pci_attach_args *));
     99 
    100 struct cfattach wi_pci_ca = {
    101 	sizeof(struct wi_pci_softc), wi_pci_match, wi_pci_attach
    102 };
    103 
    104 const struct wi_pci_product {
    105 	pci_vendor_id_t		wpp_vendor;	/* vendor ID */
    106 	pci_product_id_t	wpp_product;	/* product ID */
    107 	const char		*wpp_name;	/* product name */
    108 	int			wpp_plx;	/* uses PLX chip */
    109 } wi_pci_products[] = {
    110 	{ PCI_VENDOR_GLOBALSUN,		PCI_PRODUCT_GLOBALSUN_GL24110P,
    111 	  NULL, 1 },
    112 	{ PCI_VENDOR_GLOBALSUN,		PCI_PRODUCT_GLOBALSUN_GL24110P02,
    113 	  NULL, 1 },
    114 	{ PCI_VENDOR_EUMITCOM,		PCI_PRODUCT_EUMITCOM_WL11000P,
    115 	  NULL, 1 },
    116 	{ PCI_VENDOR_3COM,		PCI_PRODUCT_3COM_3CRWE777A,
    117 	  NULL, 1 },
    118 	{ PCI_VENDOR_NETGEAR,		PCI_PRODUCT_NETGEAR_MA301,
    119 	  NULL, 1 },
    120 	{ PCI_VENDOR_INTERSIL,		PCI_PRODUCT_INTERSIL_MINI_PCI_WLAN,
    121 	  "Intersil Prism2.5", 0 },
    122 	{ 0,				0,
    123 	  NULL, 0},
    124 };
    125 
    126 static int
    127 wi_pci_enable(sc)
    128 	struct wi_softc *sc;
    129 {
    130 	struct wi_pci_softc *psc = (struct wi_pci_softc *)sc;
    131 
    132 	/* establish the interrupt. */
    133 	sc->sc_ih = pci_intr_establish(psc->psc_pa->pa_pc,
    134 					psc->psc_ih, IPL_NET, wi_intr, sc);
    135 	if (sc->sc_ih == NULL) {
    136 		printf("%s: couldn't establish interrupt\n",
    137 		    sc->sc_dev.dv_xname);
    138 		return (EIO);
    139 	}
    140 
    141 	/* reset HFA3842 MAC core */
    142 	wi_pci_reset(sc);
    143 
    144 	return (0);
    145 }
    146 
    147 static void
    148 wi_pci_disable(sc)
    149 	struct wi_softc *sc;
    150 {
    151 	struct wi_pci_softc *psc = (struct wi_pci_softc *)sc;
    152 
    153 	pci_intr_disestablish(psc->psc_pa->pa_pc, sc->sc_ih);
    154 }
    155 
    156 static void
    157 wi_pci_reset(sc)
    158 	struct wi_softc		*sc;
    159 {
    160 	bus_space_write_2(sc->sc_iot, sc->sc_ioh,
    161 			  WI_PCI_COR, WI_PCI_SOFT_RESET);
    162 	DELAY(100*1000); /* 100 m sec */
    163 
    164 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, WI_PCI_COR, 0x0);
    165 	DELAY(100*1000); /* 100 m sec */
    166 
    167 	return;
    168 }
    169 
    170 static const struct wi_pci_product *
    171 wi_pci_lookup(pa)
    172 	struct pci_attach_args *pa;
    173 {
    174 	const struct wi_pci_product *wpp;
    175 
    176 	for (wpp = wi_pci_products; wpp->wpp_vendor != 0; wpp++) {
    177 		if (PCI_VENDOR(pa->pa_id) == wpp->wpp_vendor &&
    178 		    PCI_PRODUCT(pa->pa_id) == wpp->wpp_product)
    179 			return (wpp);
    180 	}
    181 	return (NULL);
    182 }
    183 
    184 static int
    185 wi_pci_match(parent, match, aux)
    186 	struct device *parent;
    187 	struct cfdata *match;
    188 	void *aux;
    189 {
    190 	struct pci_attach_args *pa = aux;
    191 
    192 	if (wi_pci_lookup(pa) != NULL)
    193 		return (1);
    194 	return (0);
    195 }
    196 
    197 static void
    198 wi_pci_attach(parent, self, aux)
    199 	struct device *parent, *self;
    200 	void *aux;
    201 {
    202 	struct wi_pci_softc *psc = (struct wi_pci_softc *)self;
    203 	struct wi_softc *sc = &psc->psc_wi;
    204 	struct pci_attach_args *pa = aux;
    205 	pci_chipset_tag_t pc = pa->pa_pc;
    206 	const char *intrstr;
    207 	const struct wi_pci_product *wpp;
    208 	pci_intr_handle_t ih;
    209 	bus_space_tag_t memt, iot;
    210 	bus_space_handle_t memh, ioh;
    211 
    212 	psc->psc_pa = pa;
    213 
    214 	wpp = wi_pci_lookup(pa);
    215 #ifdef DIAGNOSTIC
    216 	if (wpp == NULL) {
    217 		printf("\n");
    218 		panic("wi_pci_attach: impossible");
    219 	}
    220 #endif
    221 
    222 	if (wpp->wpp_plx) {
    223 		/* Map memory and I/O registers. */
    224 		if (pci_mapreg_map(pa, WI_PCI_LOMEM, PCI_MAPREG_TYPE_MEM, 0,
    225 		    &memt, &memh, NULL, NULL) != 0) {
    226 			printf(": can't map mem space\n");
    227 			return;
    228 		}
    229 		if (pci_mapreg_map(pa, WI_PCI_LOIO, PCI_MAPREG_TYPE_IO, 0,
    230 		    &iot, &ioh, NULL, NULL) != 0) {
    231 			printf(": can't map I/O space\n");
    232 			return;
    233 		}
    234 	} else {
    235 		if (pci_mapreg_map(pa, WI_PCI_CBMA,
    236 		    PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT,
    237 		    0, &iot, &ioh, NULL, NULL) != 0) {
    238 			printf(": can't map mem space\n");
    239 			return;
    240 		}
    241 
    242 		memt = iot;
    243 		memh = ioh;
    244 		sc->sc_pci = 1;
    245 	}
    246 
    247 	if (wpp->wpp_name != NULL) {
    248 		printf(": %s Wireless Lan\n", wpp->wpp_name);
    249 	} else {
    250 		char devinfo[256];
    251 
    252 		pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
    253 		printf(": %s (rev. 0x%02x)\n", devinfo,
    254 		       PCI_REVISION(pa->pa_class));
    255 	}
    256 
    257 	sc->sc_enabled = 1;
    258 	sc->sc_enable = wi_pci_enable;
    259 	sc->sc_disable = wi_pci_disable;
    260 
    261 	/* Enable the card. */
    262 	pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
    263 		pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
    264 		PCI_COMMAND_MASTER_ENABLE);
    265 
    266 	sc->sc_iot = iot;
    267 	sc->sc_ioh = ioh;
    268 	/* Make sure interrupts are disabled. */
    269 	CSR_WRITE_2(sc, WI_INT_EN, 0);
    270 	CSR_WRITE_2(sc, WI_EVENT_ACK, 0xFFFF);
    271 
    272 	/* Map and establish the interrupt. */
    273 	if (pci_intr_map(pa, &ih)) {
    274 		printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
    275 		return;
    276 	}
    277 	intrstr = pci_intr_string(pc, ih);
    278 
    279 	psc->psc_ih = ih;
    280 	sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, wi_intr, sc);
    281 	if (sc->sc_ih == NULL) {
    282 		printf("%s: couldn't establish interrupt",
    283 		    sc->sc_dev.dv_xname);
    284 		if (intrstr != NULL)
    285 			printf(" at %s", intrstr);
    286 		printf("\n");
    287 		return;
    288 	}
    289 
    290 	printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
    291 
    292 	if (wpp->wpp_plx) {
    293 		/*
    294 		 * Setup the PLX chip for level interrupts and config index 1
    295 		 * XXX - should really reset the PLX chip too.
    296 		 */
    297 		bus_space_write_1(memt, memh,
    298 		    WI_PLX_COR_OFFSET, WI_PLX_COR_VALUE);
    299 	} else {
    300 		/* reset HFA3842 MAC core */
    301 		wi_pci_reset(sc);
    302 	}
    303 
    304 	printf("%s:", sc->sc_dev.dv_xname);
    305 	sc->sc_ifp = &sc->sc_ethercom.ec_if;
    306 	if (wi_attach(sc) != 0) {
    307 		printf("%s: failed to attach controller\n",
    308 			sc->sc_dev.dv_xname);
    309 		pci_intr_disestablish(pa->pa_pc, sc->sc_ih);
    310 		return;
    311 	}
    312 
    313 	/* Add a suspend hook to restore PCI config state */
    314 	psc->sc_powerhook = powerhook_establish(wi_pci_powerhook, psc);
    315 	if (psc->sc_powerhook == NULL)
    316 		printf ("%s: WARNING: unable to establish pci power hook\n",
    317 		        sc->sc_dev.dv_xname);
    318 }
    319 
    320 static void
    321 wi_pci_powerhook(why, arg)
    322 	int why;
    323 	void *arg;
    324 {
    325 	struct wi_pci_softc *psc = arg;
    326 	struct wi_softc *sc = &psc->psc_wi;
    327 
    328 	wi_power(sc, why);
    329 }
    330