/*      $NetBSD: if_re_pci.c,v 1.53 2024/02/28 18:55:11 jakllsch Exp $  */

/*
* Copyright (c) 1997, 1998-2003
*      Bill Paul <[email protected]>.  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.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
* 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.
*/

/* $FreeBSD: /repoman/r/ncvs/src/sys/dev/re/if_re.c,v 1.20 2004/04/11 20:34:08 ru Exp $ */

/*
* RealTek 8139C+/8169/8169S/8110S PCI NIC driver
*
* Written by Bill Paul <[email protected]>
* Senior Networking Software Engineer
* Wind River Systems
*
* NetBSD bus-specific frontends for written by
* Jonathan Stone <[email protected]>
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_re_pci.c,v 1.53 2024/02/28 18:55:11 jakllsch Exp $");

#include <sys/types.h>

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

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

#include <sys/bus.h>

#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>

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

#include <dev/ic/rtl81x9reg.h>
#include <dev/ic/rtl81x9var.h>
#include <dev/ic/rtl8169var.h>

struct re_pci_softc {
       struct rtk_softc sc_rtk;

       void *sc_ih;
       pci_intr_handle_t *sc_pihp;
       pci_chipset_tag_t sc_pc;
};

static int      re_pci_match(device_t, cfdata_t, void *);
static void     re_pci_attach(device_t, device_t, void *);
static int      re_pci_detach(device_t, int);

CFATTACH_DECL_NEW(re_pci, sizeof(struct re_pci_softc),
   re_pci_match, re_pci_attach, re_pci_detach, NULL);

/*
* Various supported device vendors/types and their names.
*/
static const struct rtk_type re_devs[] = {
       { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139,
           RTK_8139CPLUS,
           "RealTek 8139C+ 10/100BaseTX" },
       { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8101E,
           RTK_8101E,
           "RealTek 8100E/8101E/8102E/8102EL PCIe 10/100BaseTX" },
       { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8168,
           RTK_8168,
           "RealTek 8168/8111 PCIe Gigabit Ethernet" },
       { PCI_VENDOR_NCUBE, PCI_PRODUCT_NCUBE_TG3648,
           RTK_8168,
           "TP-Link TG-3468 v2 (RTL8168) Gigabit Ethernet" },
       { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8169,
           RTK_8169,
           "RealTek 8169/8110 Gigabit Ethernet" },
       { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8169SC,
           RTK_8169,
           "RealTek 8169SC/8110SC Single-chip Gigabit Ethernet" },
       { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_E2600,
           RTK_8169,
           "Killer E2600 Gigabit Ethernet" },
       { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_LAPCIGT,
           RTK_8169,
           "Corega CG-LAPCIGT Gigabit Ethernet" },
       { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DGE528T,
           RTK_8169,
           "D-Link DGE-528T Gigabit Ethernet" },
       { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DGE530T_C1,
           RTK_8169,
           "D-Link DGE-530T C1 Gigabit Ethernet" },
       { PCI_VENDOR_USR2, PCI_PRODUCT_USR2_USR997902,
           RTK_8169,
           "US Robotics (3Com) USR997902 Gigabit Ethernet" },
       { PCI_VENDOR_LINKSYS, PCI_PRODUCT_LINKSYS_EG1032,
           RTK_8169,
           "Linksys EG1032 rev. 3 Gigabit Ethernet" },
};

static const struct rtk_type *
re_pci_lookup(const struct pci_attach_args * pa)
{
       int i;

       for (i = 0; i < __arraycount(re_devs); i++) {
               if (PCI_VENDOR(pa->pa_id) != re_devs[i].rtk_vid)
                       continue;
               if (PCI_PRODUCT(pa->pa_id) == re_devs[i].rtk_did)
                       return &re_devs[i];
       }

       return NULL;
}

#define RE_LINKSYS_EG1032_SUBID 0x00241737

/*
* Probe for a RealTek 8139C+/8169/8110 chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
static int
re_pci_match(device_t parent, cfdata_t cf, void *aux)
{
       struct pci_attach_args *pa = aux;
       pcireg_t subid;

       subid = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);

       /* special-case Linksys EG1032, since rev 2 uses sk(4) */
       if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_LINKSYS &&
           PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_LINKSYS_EG1032) {
               if (subid != RE_LINKSYS_EG1032_SUBID)
                       return 0;
       }

       /* Don't match 8139 other than C-PLUS */
       if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_REALTEK &&
           PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_REALTEK_RT8139) {
               if (PCI_REVISION(pa->pa_class) != 0x20)
                       return 0;
       }

       if (re_pci_lookup(pa) != NULL)
               return 2;       /* defeat rtk(4) */

       return 0;
}

static void
re_pci_attach(device_t parent, device_t self, void *aux)
{
       struct re_pci_softc *psc = device_private(self);
       struct rtk_softc *sc = &psc->sc_rtk;
       struct pci_attach_args *pa = aux;
       pci_chipset_tag_t pc = pa->pa_pc;
       const char *intrstr = NULL;
       const struct rtk_type *t;
       uint32_t hwrev;
       pcireg_t command, memtype;
       bool ioh_valid, memh_valid;
       bus_space_tag_t iot, memt;
       bus_space_handle_t ioh, memh;
       bus_size_t iosize, memsize;
       char intrbuf[PCI_INTRSTR_LEN];
       bool prefer_io = false;

       sc->sc_dev = self;
       psc->sc_pc = pa->pa_pc;

       command = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
       command |= PCI_COMMAND_MASTER_ENABLE;
       pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, command);

       /*
        * Map control/status registers.
        */
       ioh_valid = (pci_mapreg_map(pa, RTK_PCI_LOIO, PCI_MAPREG_TYPE_IO, 0,
           &iot, &ioh, NULL, &iosize) == 0);
       memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, RTK_PCI_LOMEM);
       switch (memtype) {
       case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT:
       case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT:
               memh_valid =
                   (pci_mapreg_map(pa, RTK_PCI_LOMEM,
                       memtype, 0, &memt, &memh, NULL, &memsize) == 0) ||
                   (pci_mapreg_map(pa, RTK_PCI_LOMEM + 4,
                       PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT,
                       0, &memt, &memh, NULL, &memsize) == 0);
               break;
       default:
               memh_valid = 0;
               break;
       }

       switch (PCI_VENDOR(pa->pa_id)) {
       case PCI_VENDOR_REALTEK:
               switch (PCI_PRODUCT(pa->pa_id)) {
               case PCI_PRODUCT_REALTEK_RT8169SC:
                       prefer_io = true;
                       break;
               }
               break;
       }
       if (!memh_valid)
               prefer_io = true;

       if (ioh_valid && prefer_io) {
               sc->rtk_btag = iot;
               sc->rtk_bhandle = ioh;
               sc->rtk_bsize = iosize;
               if (memh_valid)
                       bus_space_unmap(memt, memh, memsize);

               command = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
               command |= PCI_COMMAND_IO_ENABLE;
               pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, command);
       } else if (memh_valid) {
               sc->rtk_btag = memt;
               sc->rtk_bhandle = memh;
               sc->rtk_bsize = memsize;
               if (ioh_valid)
                       bus_space_unmap(iot, ioh, iosize);

               command = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
               command |= PCI_COMMAND_MEM_ENABLE;
               pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, command);
       } else {
               aprint_error(": can't map registers\n");
               return;
       }

       t = re_pci_lookup(pa);
       KASSERT(t != NULL);

       pci_aprint_devinfo_fancy(pa, NULL, t->rtk_name, 1);

       if (t->rtk_basetype == RTK_8139CPLUS)
               sc->sc_quirk |= RTKQ_8139CPLUS;

       if (t->rtk_basetype == RTK_8168 ||
           t->rtk_basetype == RTK_8101E)
               sc->sc_quirk |= RTKQ_PCIE;

       if (t->rtk_basetype == RTK_8168)
               sc->sc_quirk |= RTKQ_IM_HW;

       if (pci_dma64_available(pa) && (sc->sc_quirk & RTKQ_PCIE))
               sc->sc_dmat = pa->pa_dmat64;
       else
               sc->sc_dmat = pa->pa_dmat;

       /*
        * No power/enable/disable machinery for PCI attach;
        * mark the card enabled now.
        */
       sc->sc_flags |= RTK_ENABLED;

       /* Hook interrupt last to avoid having to lock softc */
       /* Allocate interrupt */
       if (pci_intr_alloc(pa, &psc->sc_pihp, NULL, 0)) {
               aprint_error_dev(self, "couldn't map interrupt\n");
               return;
       }
       intrstr = pci_intr_string(pc, psc->sc_pihp[0], intrbuf,
           sizeof(intrbuf));
       psc->sc_ih = pci_intr_establish_xname(pc, psc->sc_pihp[0], IPL_NET,
           re_intr, sc, device_xname(sc->sc_dev));
       if (psc->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);

       re_attach(sc);

       hwrev = CSR_READ_4(sc, RTK_TXCFG) & RTK_TXCFG_HWREV;

       /*
        * Perform hardware diagnostic on the original RTL8169.
        * Some 32-bit cards were incorrectly wired and would
        * malfunction if plugged into a 64-bit slot.
        */
       if (hwrev == RTK_HWREV_8169) {
               if (re_diag(sc)) {
                       re_pci_detach(self, 0);
                       aprint_error_dev(self, "disabled\n");
               }
       }
}

static int
re_pci_detach(device_t self, int flags)
{
       struct re_pci_softc *psc = device_private(self);
       struct rtk_softc *sc = &psc->sc_rtk;
       int rv;

       if ((sc->sc_flags & RTK_ATTACHED) != 0)
               /* re_stop() */
               sc->ethercom.ec_if.if_stop(&sc->ethercom.ec_if, 0);

       rv = re_detach(sc);
       if (rv)
               return rv;

       if (psc->sc_ih != NULL) {
               pci_intr_disestablish(psc->sc_pc, psc->sc_ih);
               psc->sc_ih = NULL;
       }

       if (psc->sc_pihp != NULL) {
               pci_intr_release(psc->sc_pc, psc->sc_pihp, 1);
               psc->sc_pihp = NULL;
       }

       if (sc->rtk_bsize != 0) {
               bus_space_unmap(sc->rtk_btag, sc->rtk_bhandle, sc->rtk_bsize);
               sc->rtk_bsize = 0;
       }

       return 0;
}

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