/*      $NetBSD: if_wi_pci.c,v 1.57 2018/12/09 11:14:02 jdolecek Exp $  */

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Hideaki Imaizumi <hiddy@sfc.wide.ad.jp>
 * and Ichiro FUKUHARA (ichiro@ichiro.org).
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

/*
 * PCI bus front-end for the Intersil PCI WaveLan.
 * Works with Prism2.5 Mini-PCI wavelan.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_wi_pci.c,v 1.57 2018/12/09 11:14:02 jdolecek Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <sys/callout.h>

#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>

#include <net80211/ieee80211_netbsd.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_rssadapt.h>

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

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>

#include <dev/ic/wi_ieee.h>
#include <dev/ic/wireg.h>
#include <dev/ic/wivar.h>

#define WI_PCI_CBMA PCI_BAR(0)	/* Configuration Base Memory Address */
#define WI_PCI_PLX_LOMEM	0x10	/* PLX chip membase */
#define WI_PCI_PLX_LOIO PCI_BAR(1)	/* PLX chip iobase */
#define WI_PCI_LOMEM PCI_BAR(2)	/* ISA membase */
#define WI_PCI_LOIO PCI_BAR(3)	/* ISA iobase */

#define CHIP_PLX_OTHER		0x01
#define CHIP_PLX_9052		0x02
#define CHIP_TMD_7160		0x03

#define WI_PLX_COR_OFFSET       0x3E0
#define WI_PLX_COR_VALUE        0x41

struct wi_pci_softc {
	struct wi_softc psc_wi;		/* real "wi" softc */

	/* PCI-specific goo */
	pci_intr_handle_t psc_ih;
	pci_chipset_tag_t psc_pc;
	pcitag_t psc_pcitag;
};

static int	wi_pci_match(device_t, cfdata_t, void *);
static void	wi_pci_attach(device_t, device_t, void *);
static int	wi_pci_enable(device_t, int);
static void	wi_pci_reset(struct wi_softc *);

static const struct wi_pci_product
	*wi_pci_lookup(struct pci_attach_args *);

CFATTACH_DECL_NEW(wi_pci, sizeof(struct wi_pci_softc),
    wi_pci_match, wi_pci_attach, NULL, NULL);

static const struct wi_pci_product {
	pci_vendor_id_t		wpp_vendor;	/* vendor ID */
	pci_product_id_t	wpp_product;	/* product ID */
	int			wpp_chip;	/* uses other chip */
} wi_pci_products[] = {
	{ PCI_VENDOR_GLOBALSUN,		PCI_PRODUCT_GLOBALSUN_GL24110P,
	  CHIP_PLX_OTHER },
	{ PCI_VENDOR_GLOBALSUN,		PCI_PRODUCT_GLOBALSUN_GL24110P02,
	  CHIP_PLX_OTHER },
	{ PCI_VENDOR_EUMITCOM,		PCI_PRODUCT_EUMITCOM_WL11000P,
	  CHIP_PLX_OTHER },
	{ PCI_VENDOR_3COM,		PCI_PRODUCT_3COM_3CRWE777A,
	  CHIP_PLX_OTHER },
	{ PCI_VENDOR_NETGEAR,		PCI_PRODUCT_NETGEAR_MA301,
	  CHIP_PLX_OTHER },
	{ PCI_VENDOR_INTERSIL,		PCI_PRODUCT_INTERSIL_MINI_PCI_WLAN,
	  0 },
	{ PCI_VENDOR_NDC,		PCI_PRODUCT_NDC_NCP130,
	  CHIP_PLX_9052 },
	{ PCI_VENDOR_USR2,		PCI_PRODUCT_USR2_2415,
	  CHIP_PLX_OTHER },
	{ PCI_VENDOR_NDC,		PCI_PRODUCT_NDC_NCP130A2,
	  CHIP_TMD_7160 },
	{ 0,				0,
	  0},
};

static int
wi_pci_enable(device_t self, int onoff)
{
	struct wi_pci_softc *psc = device_private(self);
	struct wi_softc *sc = &psc->psc_wi;

	if (onoff) {
		/* XXX re-establishing interrupt shouldn't be needed */
		sc->sc_ih = pci_intr_establish_xname(psc->psc_pc,
		    psc->psc_ih, IPL_NET, wi_intr, sc, device_xname(self));
		if (sc->sc_ih == NULL) {
			aprint_error_dev(sc->sc_dev,
			    "couldn't establish interrupt\n");
			return EIO;
		}

		/* reset HFA3842 MAC core */
		if (sc->sc_reset != NULL)
			wi_pci_reset(sc);

	} else
		pci_intr_disestablish(psc->psc_pc, sc->sc_ih);
	return 0;
}

static void
wi_pci_reset(struct wi_softc *sc)
{
	int i, secs, usecs;

	bus_space_write_2(sc->sc_iot, sc->sc_ioh,
	    WI_PCI_COR, WI_COR_SOFT_RESET);
	DELAY(250*1000); /* 1/4 second */

	bus_space_write_2(sc->sc_iot, sc->sc_ioh,
	    WI_PCI_COR, WI_COR_CLEAR);
	DELAY(500*1000); /* 1/2 second */

	/* wait 2 seconds for firmware to complete initialization. */

	for (i = 200000; i--; DELAY(10))
		if (!(CSR_READ_2(sc, WI_COMMAND) & WI_CMD_BUSY))
			break;

	if (i < 0) {
		printf("%s: PCI reset timed out\n", device_xname(sc->sc_dev));
	} else if (sc->sc_if.if_flags & IFF_DEBUG) {
		usecs = (200000 - i) * 10;
		secs = usecs / 1000000;
		usecs %= 1000000;

		printf("%s: PCI reset in %d.%06d seconds\n",
                       device_xname(sc->sc_dev), secs, usecs);
	}

	return;
}

static const struct wi_pci_product *
wi_pci_lookup(struct pci_attach_args *pa)
{
	const struct wi_pci_product *wpp;

	for (wpp = wi_pci_products; wpp->wpp_vendor != 0; wpp++) {
		if (PCI_VENDOR(pa->pa_id) == wpp->wpp_vendor &&
		    PCI_PRODUCT(pa->pa_id) == wpp->wpp_product)
			return (wpp);
	}
	return (NULL);
}

static int
wi_pci_match(device_t parent, cfdata_t match, void *aux)
{
	struct pci_attach_args *pa = aux;

	if (wi_pci_lookup(pa) != NULL)
		return (1);
	return (0);
}

static void
wi_pci_attach(device_t parent, device_t self, void *aux)
{
	struct wi_pci_softc *psc = device_private(self);
	struct wi_softc *sc = &psc->psc_wi;
	struct pci_attach_args *pa = aux;
	pci_chipset_tag_t pc = pa->pa_pc;
	const char *intrstr;
	const struct wi_pci_product *wpp;
	pci_intr_handle_t ih;
	bus_space_tag_t memt, iot, plxt, tmdt;
	bus_space_handle_t memh, ioh, plxh, tmdh;
	char intrbuf[PCI_INTRSTR_LEN];

	sc->sc_dev = self;
	psc->psc_pc = pc;
	psc->psc_pcitag = pa->pa_tag;

	wpp = wi_pci_lookup(pa);
#ifdef DIAGNOSTIC
	if (wpp == NULL) {
		printf("\n");
		panic("wi_pci_attach: impossible");
	}
#endif

	switch (wpp->wpp_chip) {
	case CHIP_PLX_OTHER:
	case CHIP_PLX_9052:
		/* Map memory and I/O registers. */
		if (pci_mapreg_map(pa, WI_PCI_LOMEM, PCI_MAPREG_TYPE_MEM, 0,
		    &memt, &memh, NULL, NULL) != 0) {
			aprint_error(": can't map mem space\n");
			return;
		}
		if (pci_mapreg_map(pa, WI_PCI_LOIO, PCI_MAPREG_TYPE_IO, 0,
		    &iot, &ioh, NULL, NULL) != 0) {
			aprint_error(": can't map I/O space\n");
			return;
		}

		if (wpp->wpp_chip == CHIP_PLX_OTHER) {
			/* The PLX 9052 doesn't have IO at 0x14.  Perhaps
			   other chips have, so we'll make this conditional. */
			if (pci_mapreg_map(pa, WI_PCI_PLX_LOIO,
			    PCI_MAPREG_TYPE_IO, 0, &plxt, &plxh, NULL, NULL)
			    != 0) {
				aprint_error(": can't map PLX\n");
				return;
			}
		}
		break;
	case CHIP_TMD_7160:
		/* Used instead of PLX on at least one revision of
		 * the National Datacomm Corporation NCP130. Values
		 * for registers acquired from OpenBSD, which in
		 * turn got them from a Linux driver.
		 */
		/* Map COR and I/O registers. */
		if (pci_mapreg_map(pa, WI_TMD_COR, PCI_MAPREG_TYPE_IO, 0,
		    &tmdt, &tmdh, NULL, NULL) != 0) {
			aprint_error(": can't map TMD\n");
			return;
		}
		if (pci_mapreg_map(pa, WI_TMD_IO, PCI_MAPREG_TYPE_IO, 0,
		    &iot, &ioh, NULL, NULL) != 0) {
			aprint_error(": can't map I/O space\n");
			return;
		}
		break;
	default:
		if (pci_mapreg_map(pa, WI_PCI_CBMA,
		    PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT,
		    0, &iot, &ioh, NULL, NULL) != 0) {
			aprint_error(": can't map mem space\n");
			return;
		}

		memt = iot;
		memh = ioh;
		sc->sc_pci = 1;
		break;
	}

	pci_aprint_devinfo(pa, NULL);

	sc->sc_enabled = 1;
	sc->sc_enable = wi_pci_enable;

	sc->sc_iot = iot;
	sc->sc_ioh = ioh;
	/* Make sure interrupts are disabled. */
	CSR_WRITE_2(sc, WI_INT_EN, 0);
	CSR_WRITE_2(sc, WI_EVENT_ACK, 0xFFFF);

	if (wpp->wpp_chip == CHIP_PLX_OTHER) {
		uint32_t command;
#define	WI_LOCAL_INTCSR		0x4c
#define	WI_LOCAL_INTEN		0x40	/* poke this into INTCSR */

		command = bus_space_read_4(plxt, plxh, WI_LOCAL_INTCSR);
		command |= WI_LOCAL_INTEN;
		bus_space_write_4(plxt, plxh, WI_LOCAL_INTCSR, command);
	}

	/* Map and establish the interrupt. */
	if (pci_intr_map(pa, &ih)) {
		aprint_error_dev(self, "couldn't map interrupt\n");
		return;
	}
	intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf));

	psc->psc_ih = ih;
	sc->sc_ih = pci_intr_establish_xname(pc, ih, IPL_NET, wi_intr, sc,
	    device_xname(self));
	if (sc->sc_ih == NULL) {
		aprint_error_dev(self, "couldn't establish interrupt");
		if (intrstr != NULL)
			aprint_error(" at %s", intrstr);
		aprint_error("\n");
		return;
	}

	aprint_normal_dev(self, "interrupting at %s\n", intrstr);

	switch (wpp->wpp_chip) {
	case CHIP_PLX_OTHER:
	case CHIP_PLX_9052:
		/*
		 * Setup the PLX chip for level interrupts and config index 1
		 * XXX - should really reset the PLX chip too.
		 */
		bus_space_write_1(memt, memh,
		    WI_PLX_COR_OFFSET, WI_PLX_COR_VALUE);
		break;
	case CHIP_TMD_7160:
		/* Enable I/O mode and level interrupts on the embedded
		 * card. The card's COR is the first byte of BAR 0.
		 */
		bus_space_write_1(tmdt, tmdh, 0, WI_COR_IOMODE);
		break;
	default:
		/* reset HFA3842 MAC core */
		wi_pci_reset(sc);
		break;
	}

	printf("%s:", device_xname(self));

	if (wi_attach(sc, 0) != 0) {
		aprint_error_dev(self, "failed to attach controller\n");
		pci_intr_disestablish(pa->pa_pc, sc->sc_ih);
		return;
	}

	if (!wpp->wpp_chip)
		sc->sc_reset = wi_pci_reset;

	if (pmf_device_register(self, NULL, NULL))
		pmf_class_network_register(self, &sc->sc_if);
	else
		aprint_error_dev(self, "couldn't establish power handler\n");
}