/*      $NetBSD: igsfb_pci.c,v 1.25 2019/11/10 21:16:36 chs Exp $ */

/*
* Copyright (c) 2002, 2003 Valeriy E. Ushakov
* 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. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/

/*
* Integraphics Systems IGA 168x and CyberPro series.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: igsfb_pci.c,v 1.25 2019/11/10 21:16:36 chs Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/buf.h>

#ifdef __sparc__  /* XXX: this doesn't belong here */
#include <machine/autoconf.h>
#endif
#include <sys/bus.h>
#include <sys/intr.h>

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

#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/rasops/rasops.h>
#include <dev/wscons/wsdisplay_vconsvar.h>

#include <dev/ic/igsfbreg.h>
#include <dev/ic/igsfbvar.h>
#include <dev/pci/igsfb_pcivar.h>


static int      igsfb_pci_match_by_id(pcireg_t);
static int      igsfb_pci_map_regs(struct igsfb_devconfig *,
                                  bus_space_tag_t, bus_space_tag_t,
                                  pci_chipset_tag_t,
                                  pcitag_t, pci_product_id_t);
static int      igsfb_pci_is_console(pci_chipset_tag_t, pcitag_t);

static int igsfb_pci_console = 0;
static pcitag_t igsfb_pci_constag;



static int      igsfb_pci_match(device_t, cfdata_t, void *);
static void     igsfb_pci_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(igsfb_pci, sizeof(struct igsfb_softc),
   igsfb_pci_match, igsfb_pci_attach, NULL, NULL);


static int
igsfb_pci_match_by_id(pcireg_t id)
{

       if (PCI_VENDOR(id) != PCI_VENDOR_INTEGRAPHICS)
               return 0;

       switch (PCI_PRODUCT(id)) {
       case PCI_PRODUCT_INTEGRAPHICS_IGA1682:          /* FALLTHROUGH */
       case PCI_PRODUCT_INTEGRAPHICS_CYBERPRO2000:     /* FALLTHROUGH */
       case PCI_PRODUCT_INTEGRAPHICS_CYBERPRO2010:
               return 1;
       default:
               return 0;
       }
}


int
igsfb_pci_cnattach(bus_space_tag_t iot, bus_space_tag_t memt,
                  pci_chipset_tag_t pc,
                  int bus, int device, int function)
{
       struct igsfb_devconfig *dc;
       pcitag_t tag;
       pcireg_t id;
       int ret;

       tag = pci_make_tag(pc, bus, device, function);
       id = pci_conf_read(pc, tag, PCI_ID_REG);

       if (igsfb_pci_match_by_id(id) == 0)
               return 1;

       dc = &igsfb_console_dc;
       if (igsfb_pci_map_regs(dc, iot, memt, pc, tag, PCI_PRODUCT(id)) != 0)
               return 1;

       ret = igsfb_enable(dc->dc_iot, dc->dc_iobase, dc->dc_ioflags);
       if (ret)
               return ret;

       ret = igsfb_cnattach_subr(dc);
       if (ret)
               return ret;

       igsfb_pci_console = 1;
       igsfb_pci_constag = tag;

       return 0;
}


static int
igsfb_pci_is_console(pci_chipset_tag_t pc, pcitag_t tag)
{

       return igsfb_pci_console &&
           !memcmp(&tag, &igsfb_pci_constag, sizeof tag);
}


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

       return igsfb_pci_match_by_id(pa->pa_id);
}


static void
igsfb_pci_attach(device_t parent, device_t self, void *aux)
{
       struct igsfb_softc *sc = device_private(self);
       struct pci_attach_args *pa = aux;
       int isconsole;

       sc->sc_dev = self;

       pci_aprint_devinfo(pa, NULL);

#if defined(__sparc__) && !defined(KRUPS_FORCE_SERIAL_CONSOLE)
       /* XXX: this doesn't belong here */
       if (PCITAG_NODE(pa->pa_tag) == prom_instance_to_package(prom_stdout()))
       {
               int b, d, f;

               pci_decompose_tag(pa->pa_pc, pa->pa_tag, &b, &d, &f);
               igsfb_pci_cnattach(pa->pa_iot, pa->pa_memt, pa->pa_pc, b,d,f);
       }
#endif

       isconsole = 0;
       if (igsfb_pci_is_console(pa->pa_pc, pa->pa_tag)) {
               sc->sc_dc = &igsfb_console_dc;
               isconsole = 1;
       } else {
               sc->sc_dc = malloc(sizeof(struct igsfb_devconfig),
                                  M_DEVBUF, M_WAITOK | M_ZERO);
               if (igsfb_pci_map_regs(sc->sc_dc,
                           pa->pa_iot, pa->pa_memt, pa->pa_pc,
                           pa->pa_tag, PCI_PRODUCT(pa->pa_id)) != 0)
               {
                       aprint_error("unable to map device registers\n");
                       free(sc->sc_dc, M_DEVBUF);
                       sc->sc_dc = NULL;
                       return;
               }

               igsfb_enable(sc->sc_dc->dc_iot, sc->sc_dc->dc_iobase,
                            sc->sc_dc->dc_ioflags);
       }

       igsfb_attach_subr(sc, isconsole);
}


/*
* Init memory and i/o bus space tags.  Map device registers.
* Use memory space mapped i/o space access for i/o registers
* for CyberPro cards.
*/
static int
igsfb_pci_map_regs(struct igsfb_devconfig *dc,
                  bus_space_tag_t iot, bus_space_tag_t memt,
                  pci_chipset_tag_t pc, pcitag_t tag,
                  pci_product_id_t id)
{

       dc->dc_id = id;

       /*
        * Configure memory space first since for CyberPro we use
        * memory-mapped i/o access.  Note that we are NOT mapping any
        * of it yet.  (XXX: search for memory BAR?)
        */
#define IGS_MEM_MAPREG (PCI_MAPREG_START + 0)

       dc->dc_memt = memt;
       if (pci_mapreg_info(pc, tag,
               IGS_MEM_MAPREG, PCI_MAPREG_TYPE_MEM,
               &dc->dc_memaddr, &dc->dc_memsz, &dc->dc_memflags) != 0)
       {
               printf("unable to configure memory space\n");
               return 1;
       }

       /*
        * Configure I/O space.  On CyberPro use MMIO.  IGS 168x doesn't
        * have a BAR for its i/o space, so we have to hardcode it.
        */
       if (id >= PCI_PRODUCT_INTEGRAPHICS_CYBERPRO2000) {
               dc->dc_iot = dc->dc_memt;
               dc->dc_iobase = dc->dc_memaddr | IGS_MEM_MMIO_SELECT;
               dc->dc_ioflags = dc->dc_memflags;
       } else {
               dc->dc_iot = iot;
               dc->dc_iobase = 0;
               dc->dc_ioflags = 0;
       }

       /*
        * Map I/O registers.  This is done in bus glue, not in common
        * code because on e.g. ISA bus we'd need to access registers
        * to obtain/program linear memory location.
        */
       if (bus_space_map(dc->dc_iot,
                         dc->dc_iobase + IGS_REG_BASE, IGS_REG_SIZE,
                         dc->dc_ioflags,
                         &dc->dc_ioh) != 0)
       {
               printf("unable to map I/O registers\n");
               return 1;
       }

       return 0;
}

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