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if_atw_cardbus.c revision 1.25 
      1 /* $NetBSD: if_atw_cardbus.c,v 1.25 2009/02/06 02:00:50 dyoung Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999, 2000, 2003 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center.  This code was adapted for the ADMtek ADM8211
     10  * by David Young.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 /*
     35  * CardBus bus front-end for the ADMtek ADM8211 802.11 MAC/BBP driver.
     36  */
     37 
     38 #include <sys/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: if_atw_cardbus.c,v 1.25 2009/02/06 02:00:50 dyoung Exp $");
     40 
     41 #include "opt_inet.h"
     42 #include "bpfilter.h"
     43 
     44 #include <sys/param.h>
     45 #include <sys/systm.h>
     46 #include <sys/mbuf.h>
     47 #include <sys/malloc.h>
     48 #include <sys/kernel.h>
     49 #include <sys/socket.h>
     50 #include <sys/ioctl.h>
     51 #include <sys/errno.h>
     52 #include <sys/device.h>
     53 
     54 #include <machine/endian.h>
     55 
     56 #include <net/if.h>
     57 #include <net/if_dl.h>
     58 #include <net/if_media.h>
     59 #include <net/if_ether.h>
     60 
     61 #include <net80211/ieee80211_netbsd.h>
     62 #include <net80211/ieee80211_radiotap.h>
     63 #include <net80211/ieee80211_var.h>
     64 
     65 #if NBPFILTER > 0
     66 #include <net/bpf.h>
     67 #endif
     68 
     69 #ifdef INET
     70 #include <netinet/in.h>
     71 #include <netinet/if_inarp.h>
     72 #endif
     73 
     74 
     75 #include <sys/bus.h>
     76 #include <sys/intr.h>
     77 
     78 #include <dev/ic/atwreg.h>
     79 #include <dev/ic/rf3000reg.h>
     80 #include <dev/ic/si4136reg.h>
     81 #include <dev/ic/atwvar.h>
     82 
     83 #include <dev/pci/pcivar.h>
     84 #include <dev/pci/pcireg.h>
     85 #include <dev/pci/pcidevs.h>
     86 
     87 #include <dev/cardbus/cardbusvar.h>
     88 #include <dev/pci/pcidevs.h>
     89 
     90 /*
     91  * PCI configuration space registers used by the ADM8211.
     92  */
     93 #define	ATW_PCI_IOBA		0x10	/* i/o mapped base */
     94 #define	ATW_PCI_MMBA		0x14	/* memory mapped base */
     95 
     96 struct atw_cardbus_softc {
     97 	struct atw_softc sc_atw;
     98 
     99 	/* CardBus-specific goo. */
    100 	void			*sc_ih;		/* interrupt handle */
    101 	cardbus_devfunc_t	sc_ct;		/* our CardBus devfuncs */
    102 	cardbustag_t		sc_tag;		/* our CardBus tag */
    103 	cardbusreg_t		sc_csr;		/* CSR bits */
    104 	bus_size_t		sc_mapsize;	/* the size of mapped bus space
    105 						 * region
    106 						 */
    107 
    108 	int			sc_cben;	/* CardBus enables */
    109 	int			sc_bar_reg;	/* which BAR to use */
    110 	cardbusreg_t		sc_bar_val;	/* value of the BAR */
    111 
    112 	cardbus_intr_line_t sc_intrline; /* interrupt line */
    113 };
    114 
    115 static int	atw_cardbus_match(device_t, cfdata_t, void *);
    116 static void	atw_cardbus_attach(device_t, device_t, void *);
    117 static int	atw_cardbus_detach(device_t, int);
    118 
    119 CFATTACH_DECL_NEW(atw_cardbus, sizeof(struct atw_cardbus_softc),
    120     atw_cardbus_match, atw_cardbus_attach, atw_cardbus_detach, atw_activate);
    121 
    122 static void	atw_cardbus_setup(struct atw_cardbus_softc *);
    123 
    124 static int	atw_cardbus_enable(struct atw_softc *);
    125 static void	atw_cardbus_disable(struct atw_softc *);
    126 
    127 static const struct atw_cardbus_product *atw_cardbus_lookup
    128    (const struct cardbus_attach_args *);
    129 
    130 static const struct atw_cardbus_product {
    131 	u_int32_t	 acp_vendor;	/* PCI vendor ID */
    132 	u_int32_t	 acp_product;	/* PCI product ID */
    133 	const char	*acp_product_name;
    134 } atw_cardbus_products[] = {
    135 	{ PCI_VENDOR_ADMTEK,		PCI_PRODUCT_ADMTEK_ADM8211,
    136 	  "ADMtek ADM8211 802.11 MAC/BBP" },
    137 
    138 	{ 0,				0,	NULL },
    139 };
    140 
    141 static const struct atw_cardbus_product *
    142 atw_cardbus_lookup(const struct cardbus_attach_args *ca)
    143 {
    144 	const struct atw_cardbus_product *acp;
    145 
    146 	for (acp = atw_cardbus_products; acp->acp_product_name != NULL; acp++) {
    147 		if (PCI_VENDOR(ca->ca_id) == acp->acp_vendor &&
    148 		    PCI_PRODUCT(ca->ca_id) == acp->acp_product)
    149 			return acp;
    150 	}
    151 	return NULL;
    152 }
    153 
    154 static int
    155 atw_cardbus_match(device_t parent, cfdata_t match, void *aux)
    156 {
    157 	struct cardbus_attach_args *ca = aux;
    158 
    159 	if (atw_cardbus_lookup(ca) != NULL)
    160 		return 1;
    161 
    162 	return 0;
    163 }
    164 
    165 static void
    166 atw_cardbus_attach(device_t parent, device_t self, void *aux)
    167 {
    168 	struct atw_cardbus_softc *csc = device_private(self);
    169 	struct atw_softc *sc = &csc->sc_atw;
    170 	struct cardbus_attach_args *ca = aux;
    171 	cardbus_devfunc_t ct = ca->ca_ct;
    172 	const struct atw_cardbus_product *acp;
    173 #if 0
    174 	int i;
    175 #define	FUNCREG(__x)	{#__x, (__x)}
    176 	struct {
    177 		const char *name;
    178 		bus_size_t ofs;
    179 	} funcregs[] = {
    180 		FUNCREG(ATW_FER), FUNCREG(ATW_FEMR), FUNCREG(ATW_FPSR),
    181 		FUNCREG(ATW_FFER)
    182 	};
    183 #undef FUNCREG
    184 #endif
    185 	bus_addr_t adr;
    186 
    187 	sc->sc_dev = self;
    188 	sc->sc_dmat = ca->ca_dmat;
    189 	csc->sc_ct = ct;
    190 	csc->sc_tag = ca->ca_tag;
    191 
    192 	acp = atw_cardbus_lookup(ca);
    193 	if (acp == NULL) {
    194 		printf("\n");
    195 		panic("atw_cardbus_attach: impossible");
    196 	}
    197 
    198 	/*
    199 	 * Power management hooks.
    200 	 */
    201 	sc->sc_enable = atw_cardbus_enable;
    202 	sc->sc_disable = atw_cardbus_disable;
    203 
    204 	/* Get revision info. */
    205 	sc->sc_rev = PCI_REVISION(ca->ca_class);
    206 
    207 	printf(": %s, revision %d.%d\n", acp->acp_product_name,
    208 	    (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
    209 
    210 #if 0
    211 	printf("%s: signature %08x\n", device_xname(self),
    212 	    (rev >> 4) & 0xf, rev & 0xf,
    213 	    cardbus_conf_read(ct->ct_cc, ct->ct_cf, csc->sc_tag, 0x80));
    214 #endif
    215 
    216 	/*
    217 	 * Map the device.
    218 	 */
    219 	csc->sc_csr = CARDBUS_COMMAND_MASTER_ENABLE;
    220 	if (Cardbus_mapreg_map(ct, ATW_PCI_MMBA,
    221 	    CARDBUS_MAPREG_TYPE_MEM, 0, &sc->sc_st, &sc->sc_sh, &adr,
    222 	    &csc->sc_mapsize) == 0) {
    223 #if 0
    224 		printf("%s: atw_cardbus_attach mapped %d bytes mem space\n",
    225 		    device_xname(self), csc->sc_mapsize);
    226 #endif
    227 #if rbus
    228 #else
    229 		(*ct->ct_cf->cardbus_mem_open)(cc, 0, adr, adr+csc->sc_mapsize);
    230 #endif
    231 		csc->sc_cben = CARDBUS_MEM_ENABLE;
    232 		csc->sc_csr |= CARDBUS_COMMAND_MEM_ENABLE;
    233 		csc->sc_bar_reg = ATW_PCI_MMBA;
    234 		csc->sc_bar_val = adr | CARDBUS_MAPREG_TYPE_MEM;
    235 	} else if (Cardbus_mapreg_map(ct, ATW_PCI_IOBA,
    236 	    CARDBUS_MAPREG_TYPE_IO, 0, &sc->sc_st, &sc->sc_sh, &adr,
    237 	    &csc->sc_mapsize) == 0) {
    238 #if 0
    239 		printf("%s: atw_cardbus_attach mapped %d bytes I/O space\n",
    240 		    device_xname(self), csc->sc_mapsize);
    241 #endif
    242 #if rbus
    243 #else
    244 		(*ct->ct_cf->cardbus_io_open)(cc, 0, adr, adr+csc->sc_mapsize);
    245 #endif
    246 		csc->sc_cben = CARDBUS_IO_ENABLE;
    247 		csc->sc_csr |= CARDBUS_COMMAND_IO_ENABLE;
    248 		csc->sc_bar_reg = ATW_PCI_IOBA;
    249 		csc->sc_bar_val = adr | CARDBUS_MAPREG_TYPE_IO;
    250 	} else {
    251 		aprint_error_dev(self, "unable to map device registers\n");
    252 		return;
    253 	}
    254 
    255 	/*
    256 	 * Bring the chip out of powersave mode and initialize the
    257 	 * configuration registers.
    258 	 */
    259 	atw_cardbus_setup(csc);
    260 
    261 	/* Remember which interrupt line. */
    262 	csc->sc_intrline = ca->ca_intrline;
    263 
    264 #if 0
    265 	/*
    266 	 * The CardBus cards will make it to store-and-forward mode as
    267 	 * soon as you put them under any kind of load, so just start
    268 	 * out there.
    269 	 */
    270 	sc->sc_txthresh = 3; /* TBD name constant */
    271 #endif
    272 
    273 	/*
    274 	 * Finish off the attach.
    275 	 */
    276 	atw_attach(sc);
    277 
    278 #if 0
    279 	for (i = 0; i < __arraycount(funcregs); i++) {
    280 		aprint_error_dev(sc->sc_dev, "%s %" PRIx32 "\n",
    281 		    funcregs[i].name, ATW_READ(sc, funcregs[i].ofs));
    282 	}
    283 #endif
    284 	ATW_WRITE(sc, ATW_FEMR, 0);
    285 	ATW_WRITE(sc, ATW_FER, ATW_READ(sc, ATW_FER));
    286 
    287 	/*
    288 	 * Power down the socket.
    289 	 */
    290 	Cardbus_function_disable(csc->sc_ct);
    291 }
    292 
    293 static int
    294 atw_cardbus_detach(device_t self, int flags)
    295 {
    296 	struct atw_cardbus_softc *csc = device_private(self);
    297 	struct atw_softc *sc = &csc->sc_atw;
    298 	struct cardbus_devfunc *ct = csc->sc_ct;
    299 	int rv;
    300 
    301 #if defined(DIAGNOSTIC)
    302 	if (ct == NULL)
    303 		panic("%s: data structure lacks", device_xname(self));
    304 #endif
    305 
    306 	rv = atw_detach(sc);
    307 	if (rv != 0)
    308 		return rv;
    309 
    310 	/*
    311 	 * Unhook the interrupt handler.
    312 	 */
    313 	if (csc->sc_ih != NULL)
    314 		cardbus_intr_disestablish(ct->ct_cc, ct->ct_cf, csc->sc_ih);
    315 
    316 	/*
    317 	 * Release bus space and close window.
    318 	 */
    319 	if (csc->sc_bar_reg != 0)
    320 		Cardbus_mapreg_unmap(ct, csc->sc_bar_reg,
    321 		    sc->sc_st, sc->sc_sh, csc->sc_mapsize);
    322 
    323 	return 0;
    324 }
    325 
    326 static int
    327 atw_cardbus_enable(struct atw_softc *sc)
    328 {
    329 	struct atw_cardbus_softc *csc = (struct atw_cardbus_softc *)sc;
    330 	cardbus_devfunc_t ct = csc->sc_ct;
    331 	cardbus_chipset_tag_t cc = ct->ct_cc;
    332 	cardbus_function_tag_t cf = ct->ct_cf;
    333 
    334 	/*
    335 	 * Power on the socket.
    336 	 */
    337 	Cardbus_function_enable(ct);
    338 
    339 	/*
    340 	 * Set up the PCI configuration registers.
    341 	 */
    342 	atw_cardbus_setup(csc);
    343 
    344 	/*
    345 	 * Map and establish the interrupt.
    346 	 */
    347 	csc->sc_ih = cardbus_intr_establish(cc, cf, csc->sc_intrline, IPL_NET,
    348 	    atw_intr, sc);
    349 	if (csc->sc_ih == NULL) {
    350 		aprint_error_dev(sc->sc_dev,
    351 				 "unable to establish interrupt\n");
    352 		Cardbus_function_disable(csc->sc_ct);
    353 		return 1;
    354 	}
    355 
    356 	return 0;
    357 }
    358 
    359 static void
    360 atw_cardbus_disable(struct atw_softc *sc)
    361 {
    362 	struct atw_cardbus_softc *csc = (struct atw_cardbus_softc *)sc;
    363 	cardbus_devfunc_t ct = csc->sc_ct;
    364 	cardbus_chipset_tag_t cc = ct->ct_cc;
    365 	cardbus_function_tag_t cf = ct->ct_cf;
    366 
    367 	/* Unhook the interrupt handler. */
    368 	cardbus_intr_disestablish(cc, cf, csc->sc_ih);
    369 	csc->sc_ih = NULL;
    370 
    371 	/* Power down the socket. */
    372 	Cardbus_function_disable(ct);
    373 }
    374 
    375 static void
    376 atw_cardbus_setup(struct atw_cardbus_softc *csc)
    377 {
    378 	cardbus_devfunc_t ct = csc->sc_ct;
    379 	cardbus_chipset_tag_t cc = ct->ct_cc;
    380 	cardbus_function_tag_t cf = ct->ct_cf;
    381 	cardbusreg_t csr;
    382 
    383 	(void)cardbus_set_powerstate(ct, csc->sc_tag, PCI_PWR_D0);
    384 
    385 	/* Program the BAR. */
    386 	cardbus_conf_write(cc, cf, csc->sc_tag, csc->sc_bar_reg,
    387 	    csc->sc_bar_val);
    388 
    389 	/* Make sure the right access type is on the CardBus bridge. */
    390 	(*ct->ct_cf->cardbus_ctrl)(cc, csc->sc_cben);
    391 	(*ct->ct_cf->cardbus_ctrl)(cc, CARDBUS_BM_ENABLE);
    392 
    393 	/* Enable the appropriate bits in the PCI CSR. */
    394 	csr = cardbus_conf_read(cc, cf, csc->sc_tag,
    395 	    CARDBUS_COMMAND_STATUS_REG);
    396 	csr &= ~(CARDBUS_COMMAND_IO_ENABLE|CARDBUS_COMMAND_MEM_ENABLE);
    397 	csr |= csc->sc_csr;
    398 	cardbus_conf_write(cc, cf, csc->sc_tag, CARDBUS_COMMAND_STATUS_REG,
    399 	    csr);
    400 }
    401