/*
 * Copyright (c) 2002 Takeshi Shibagaki
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/* xe pccard interface driver */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>

#include <sys/module.h>
#include <sys/bus.h>

#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
 
#include <net/ethernet.h>
#include <net/if.h> 
#include <net/if_arp.h>
#include <net/if_media.h>
#include <net/if_mib.h>


#include <dev/xe/if_xereg.h>
#include <dev/xe/if_xevar.h>

#include <dev/pccard/pccardvar.h>
#include <dev/pccard/pccarddevs.h>
#include <dev/pccard/pccard_cis.h>
#include "card_if.h"

/*
 * Debug logging levels - set with hw.xe.debug sysctl
 * 0 = None
 * 1 = More hardware details, probe/attach progress
 * 2 = Most function calls, ioctls and media selection progress
 * 3 = Everything - interrupts, packets in/out and multicast address setup
 */
#define XE_DEBUG
#ifdef XE_DEBUG

extern int xe_debug;

#define DEVPRINTF(level, arg) if (xe_debug >= (level)) device_printf arg
#define DPRINTF(level, arg) if (xe_debug >= (level)) printf arg
#else
#define DEVPRINTF(level, arg)
#define DPRINTF(level, arg)
#endif


#define XE_CARD_TYPE_FLAGS_NO 0x0
#define XE_CARD_TYPE_FLAGS_CE2 0x1
#define XE_CARD_TYPE_FLAGS_MOHAWK 0x2
#define XE_CARD_TYPE_FLAGS_DINGO 0x4
#define XE_PROD_ETHER_MASK 0x0100
#define XE_PROD_MODEM_MASK 0x1000

#define XE_BOGUS_MAC_OFFSET 0x90

/* MAC vendor prefix used by most Xircom cards is 00:80:c7 */
#define XE_MAC_ADDR_0 0x00
#define XE_MAC_ADDR_1 0x80
#define XE_MAC_ADDR_2 0xc7

/* Some (all?) REM56 cards have vendor prefix 00:10:a4 */
#define XE_REM56_MAC_ADDR_0 0x00
#define XE_REM56_MAC_ADDR_1 0x10
#define XE_REM56_MAC_ADDR_2 0xa4


struct xe_pccard_product {
	struct pccard_product product;
	u_int16_t prodext;
	u_int16_t flags;
};

static const struct xe_pccard_product xe_pccard_products[] = {
	{ PCMCIA_CARD_D(ACCTON, EN2226, 0),      0x43, XE_CARD_TYPE_FLAGS_MOHAWK },
	{ PCMCIA_CARD_D(COMPAQ2, CPQ_10_100, 0), 0x43, XE_CARD_TYPE_FLAGS_MOHAWK },
	{ PCMCIA_CARD_D(INTEL, EEPRO100, 0),     0x43, XE_CARD_TYPE_FLAGS_MOHAWK },
	{ PCMCIA_CARD_D(XIRCOM, CE, 0),          0x41, XE_CARD_TYPE_FLAGS_NO },
	{ PCMCIA_CARD_D(XIRCOM, CE2, 0),         0x41, XE_CARD_TYPE_FLAGS_CE2 },
	{ PCMCIA_CARD_D(XIRCOM, CE2, 0),         0x42, XE_CARD_TYPE_FLAGS_CE2 },
	{ PCMCIA_CARD_D(XIRCOM, CE2_2, 0),       0x41, XE_CARD_TYPE_FLAGS_CE2 },
	{ PCMCIA_CARD_D(XIRCOM, CE2_2, 0),       0x42, XE_CARD_TYPE_FLAGS_CE2 },
	{ PCMCIA_CARD_D(XIRCOM, CE3, 0),         0x43, XE_CARD_TYPE_FLAGS_MOHAWK },
	{ PCMCIA_CARD_D(XIRCOM, CEM, 0),         0x41, XE_CARD_TYPE_FLAGS_NO },
	{ PCMCIA_CARD_D(XIRCOM, CEM2, 0),        0x42, XE_CARD_TYPE_FLAGS_CE2 },
	{ PCMCIA_CARD_D(XIRCOM, CEM28, 0),       0x43, XE_CARD_TYPE_FLAGS_CE2 },
	{ PCMCIA_CARD_D(XIRCOM, CEM33, 0),       0x44, XE_CARD_TYPE_FLAGS_CE2 },
	{ PCMCIA_CARD_D(XIRCOM, CEM33_2, 0),     0x44, XE_CARD_TYPE_FLAGS_CE2 },
	{ PCMCIA_CARD_D(XIRCOM, CEM56, 0),       0x45, XE_CARD_TYPE_FLAGS_DINGO },
	{ PCMCIA_CARD_D(XIRCOM, CEM56_2, 0),     0x46, XE_CARD_TYPE_FLAGS_DINGO },
	{ PCMCIA_CARD_D(XIRCOM, REM56, 0),       0x46, XE_CARD_TYPE_FLAGS_DINGO },
	{ PCMCIA_CARD_D(XIRCOM, REM10, 0),       0x47, XE_CARD_TYPE_FLAGS_DINGO },
	{ PCMCIA_CARD_D(XIRCOM, XEM5600, 0),     0x56, XE_CARD_TYPE_FLAGS_DINGO },
	{ { NULL }, 0, 0 }	
};


/*
 * Fixing for CEM2, CEM3 and CEM56/REM56 cards.  These need some magic to
 * enable the Ethernet function, which isn't mentioned anywhere in the CIS.
 * Despite the register names, most of this isn't Dingo-specific.
 */
static int
xe_cemfix(device_t dev)
{
	struct xe_softc *sc = (struct xe_softc *) device_get_softc(dev);
	bus_space_tag_t bst;
	bus_space_handle_t bsh;
	struct resource *r;
	int rid;
	int ioport;

	DEVPRINTF(2, (dev, "cemfix\n"));

	DEVPRINTF(1, (dev, "CEM I/O port 0x%0lx, size 0x%0lx\n",
		bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid),
		bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid)));

	rid = 0;
	r = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0,
			       ~0, 4 << 10, RF_ACTIVE);
	if (!r) {
		device_printf(dev, "cemfix: Can't map in attribute memory\n");
		return (-1);
	}

	bsh = rman_get_bushandle(r);
	bst = rman_get_bustag(r);

	CARD_SET_RES_FLAGS(device_get_parent(dev), dev, SYS_RES_MEMORY, rid,
			   PCCARD_A_MEM_ATTR);

	bus_space_write_1(bst, bsh, DINGO_ECOR, DINGO_ECOR_IRQ_LEVEL |
						DINGO_ECOR_INT_ENABLE |
						DINGO_ECOR_IOB_ENABLE |
						DINGO_ECOR_ETH_ENABLE);
	ioport = bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid);
	bus_space_write_1(bst, bsh, DINGO_EBAR0, ioport & 0xff);
	bus_space_write_1(bst, bsh, DINGO_EBAR1, (ioport >> 8) & 0xff);

	if (sc->dingo) {
		bus_space_write_1(bst, bsh, DINGO_DCOR0, DINGO_DCOR0_SF_INT);
		bus_space_write_1(bst, bsh, DINGO_DCOR1, DINGO_DCOR1_INT_LEVEL |
						  DINGO_DCOR1_EEDIO);
		bus_space_write_1(bst, bsh, DINGO_DCOR2, 0x00);
		bus_space_write_1(bst, bsh, DINGO_DCOR3, 0x00);
		bus_space_write_1(bst, bsh, DINGO_DCOR4, 0x00);
	}

	bus_release_resource(dev, SYS_RES_MEMORY, rid, r);

	/* success! */
	return (0);
}

/*
 * Fixing for CE2-class cards with bogus CIS entry for MAC address.  This
 * should be in a type 0x22 tuple, but some cards seem to use 0x89.
 * This function looks for a sensible MAC address tuple starting at the given
 * offset in attribute memory, ignoring the tuple type field.
 */
static int
xe_macfix(device_t dev, int offset)
{
	struct xe_softc *sc = (struct xe_softc *) device_get_softc(dev);
	bus_space_tag_t bst;
	bus_space_handle_t bsh;
	struct resource *r;
	int rid, i;
	u_int8_t cisdata[9];
	u_int8_t required[6] = { 0x08, PCCARD_TPLFE_TYPE_LAN_NID, ETHER_ADDR_LEN,
				 XE_MAC_ADDR_0, XE_MAC_ADDR_1, XE_MAC_ADDR_2 };

	DEVPRINTF(2, (dev, "macfix\n"));

	rid = 0;
	r = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0,
			       ~0, 4 << 10, RF_ACTIVE);
	if (!r) {
		device_printf(dev, "macfix: Can't map in attribute memory\n");
		return (-1);
	}

	bsh = rman_get_bushandle(r);
	bst = rman_get_bustag(r);

	CARD_SET_RES_FLAGS(device_get_parent(dev), dev, SYS_RES_MEMORY, rid,
			   PCCARD_A_MEM_ATTR);

	/*
	 * Looking for (relative to offset):
	 *
	 *  0x00	0x??	Tuple type (ignored)
	 *  0x02 	0x08	Tuple length (must be 8)
	 *  0x04	0x04	Address type? (must be 4)
	 *  0x06	0x06	Address length (must be 6)
	 *  0x08	0x00	Manufacturer ID, byte 1
	 *  0x0a	0x80	Manufacturer ID, byte 2
	 *  0x0c	0xc7	Manufacturer ID, byte 3
	 *  0x0e	0x??	Card ID, byte 1
	 *  0x10	0x??	Card ID, byte 2
	 *  0x12	0x??	Card ID, byte 3
	 */
	for (i = 0; i < 9; i++) {
		cisdata[i] = bus_space_read_1(bst, bsh, offset + (2 * i) + 2);
		if (i < 6 && required[i] != cisdata[i]) {
			device_printf(dev, "macfix: Can't find valid MAC address\n");
			bus_release_resource(dev, SYS_RES_MEMORY, rid, r);
			return (-1);
		}
	}
	
	for (i = 0; i < ETHER_ADDR_LEN; i++) {
		sc->arpcom.ac_enaddr[i] = cisdata[i + 3];
	}
	    
	bus_release_resource(dev, SYS_RES_MEMORY, rid, r);

	/* success! */
	return (0);
}

/*
 * PCMCIA probe routine.
 * Identify the device.  Called from the bus driver when the card is
 * inserted or otherwise powers up.
 */
static int
xe_pccard_probe(device_t dev)
{
	struct xe_softc *scp = (struct xe_softc *) device_get_softc(dev);
	u_int32_t vendor,product;
	u_int16_t prodext;
	const char* vendor_str = NULL;
	const char* product_str = NULL;
	const char* cis4_str = NULL;
	const char *cis3_str=NULL;
	const struct xe_pccard_product *xpp;

	DEVPRINTF(2, (dev, "pccard_probe\n"));

	pccard_get_vendor(dev, &vendor);
	pccard_get_product(dev, &product);
	pccard_get_prodext(dev, &prodext);
	pccard_get_vendor_str(dev, &vendor_str);
	pccard_get_product_str(dev, &product_str);
	pccard_get_cis3_str(dev, &cis3_str);
	pccard_get_cis4_str(dev, &cis4_str);

	DEVPRINTF(1, (dev, "vendor = 0x%04x\n", vendor));
	DEVPRINTF(1, (dev, "product = 0x%04x\n", product));
	DEVPRINTF(1, (dev, "prodext = 0x%02x\n", prodext));
	DEVPRINTF(1, (dev, "vendor_str = %s\n", vendor_str));
	DEVPRINTF(1, (dev, "product_str = %s\n", product_str));
	DEVPRINTF(1, (dev, "cis3_str = %s\n", cis3_str));
	DEVPRINTF(1, (dev, "cis4_str = %s\n", cis4_str));


	/*
	 * Possibly already did this search in xe_pccard_match(),
	 * but we need to do it here anyway to figure out which
	 * card we have.
	 */
	for (xpp = xe_pccard_products; xpp->product.pp_vendor != 0; xpp++) {
		if (vendor == xpp->product.pp_vendor &&
		    product == xpp->product.pp_product &&
		    prodext == xpp->prodext)
			break;
	}

	/* Found a match? */
	if (xpp->product.pp_vendor == 0)
		return (ENODEV);


	/* Set card name for logging later */
	if (xpp->product.pp_name != NULL)
		device_set_desc(dev, xpp->product.pp_name);

	/* Reject known but unsupported cards */
	if (xpp->flags & XE_CARD_TYPE_FLAGS_NO) {
		device_printf(dev, "Sorry, your %s %s card is not supported :(\n",
				vendor_str, product_str);
		return (ENODEV);
	}

	/* Set various card ID fields in softc */
	scp->vendor = vendor_str;
	scp->card_type = product_str;
	if (xpp->flags & XE_CARD_TYPE_FLAGS_CE2)
		scp->ce2 = 1;
	if (xpp->flags & XE_CARD_TYPE_FLAGS_MOHAWK)
		scp->mohawk = 1;
	if (xpp->flags & XE_CARD_TYPE_FLAGS_DINGO) {
		scp->dingo = 1;
		scp->mohawk = 1;
	}
	if (xpp->product.pp_product & XE_PROD_MODEM_MASK)
		scp->modem = 1;

	/* Get MAC address */
	pccard_get_ether(dev, scp->arpcom.ac_enaddr);

	/* Deal with bogus MAC address */
	if (xpp->product.pp_vendor == PCMCIA_VENDOR_XIRCOM
	    && scp->ce2
	    && (scp->arpcom.ac_enaddr[0] != XE_MAC_ADDR_0
		|| scp->arpcom.ac_enaddr[1] != XE_MAC_ADDR_1
		|| scp->arpcom.ac_enaddr[2] != XE_MAC_ADDR_2)
	    && xe_macfix(dev, XE_BOGUS_MAC_OFFSET) < 0) {
		device_printf(dev,
			      "Unable to find MAC address for your %s card\n",
			      scp->card_type);
		return (ENODEV);	    
	}

	/* Success */
	return (0);
}

/*
 * Attach a device.
 */
static int
xe_pccard_attach(device_t dev)
{
	struct xe_softc *scp = device_get_softc(dev);
	int err;

	DEVPRINTF(2, (dev, "pccard_attach\n"));

	if ((err = xe_activate(dev)) != 0)
		return (err);
         
	/* Hack RealPorts into submission */
	if (scp->modem && xe_cemfix(dev) < 0) {
		device_printf(dev, "Unable to fix your %s %s combo card\n",
					  scp->vendor, scp->card_type);
		xe_deactivate(dev);
		return (ENODEV);
	}
	if ((err = xe_attach(dev))) {
		device_printf(dev, "xe_attach() failed! (%d)\n", err);
		return (err);
	}
	return (0);
}

/*
 * The device entry is being removed, probably because someone ejected the
 * card.  The interface should have been brought down manually before calling
 * this function; if not you may well lose packets.  In any case, I shut down
 * the card and the interface, and hope for the best.
 */
static int
xe_pccard_detach(device_t dev)
{
	struct xe_softc *sc = device_get_softc(dev);

	DEVPRINTF(2, (dev, "pccard_detach\n"));

	sc->arpcom.ac_if.if_flags &= ~IFF_RUNNING;
	ether_ifdetach(&sc->arpcom.ac_if);
	xe_deactivate(dev);
	return (0);
}

static int
xe_pccard_product_match(device_t dev, const struct pccard_product* ent, int vpfmatch)
{
	const struct xe_pccard_product* xpp;
	u_int16_t prodext;

	DEVPRINTF(2, (dev, "pccard_product_match\n"));

	xpp = (const struct xe_pccard_product*)ent;
	pccard_get_prodext(dev, &prodext);

	if (xpp->prodext != prodext)
		vpfmatch = 0;

	return (vpfmatch);
}

static int
xe_pccard_match(device_t dev)
{
	const struct pccard_product *pp;

	DEVPRINTF(2, (dev, "pccard_match\n"));

	pp = (const struct pccard_product*)xe_pccard_products;

	if ((pp = pccard_product_lookup(dev, pp,
	     sizeof(xe_pccard_products[0]), xe_pccard_product_match)) != NULL)
		return (0);

	return (EIO);
}

static device_method_t xe_pccard_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         pccard_compat_probe),
        DEVMETHOD(device_attach,        pccard_compat_attach),
        DEVMETHOD(device_detach,        xe_pccard_detach),

        /* Card interface */
        DEVMETHOD(card_compat_match,    xe_pccard_match),
        DEVMETHOD(card_compat_probe,    xe_pccard_probe),
        DEVMETHOD(card_compat_attach,   xe_pccard_attach),

        { 0, 0 }
};

static driver_t xe_pccard_driver = {
        "xe",
        xe_pccard_methods,
        sizeof(struct xe_softc),
};

devclass_t xe_devclass;

DRIVER_MODULE(xe, pccard, xe_pccard_driver, xe_devclass, 0, 0);