/* $NetBSD: genfb_grfbus.c,v 1.3 2024/12/09 10:32:53 nat Exp $ */

/* NetBSD: simplefb.c,v 1.7 2019/01/30 00:55:04 jmcneill Exp */
/*-
* Copyright (c) 2017 Jared McNeill <[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.
*
* 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.
*/

/* NetBSD: macfb.c,v 1.20 2012/10/27 17:17:59 chs Exp */
/*
* Copyright (c) 1998 Matt DeBergalis
* 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 Matt DeBergalis
* 4. 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.
*/

#include "opt_wsdisplay_compat.h"

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: genfb_grfbus.c,v 1.3 2024/12/09 10:32:53 nat Exp $");

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

#include <machine/cpu.h>
#include <machine/bus.h>

#include <machine/video.h>
#include <machine/grfioctl.h>
#include <mac68k/nubus/nubus.h>
#include <mac68k/dev/grfvar.h>

#include <dev/wsfb/genfbvar.h>

struct genfb_grfbus_softc {
       struct genfb_softc sc_gen;

       uint32_t sc_width;
       uint32_t sc_height;
       uint8_t  sc_depth;
       uint16_t sc_stride;

       paddr_t sc_paddr;
       vaddr_t sc_vaddr;

       void (*sc_set_mapreg)(void *, int, int, int, int);
       struct grfbus_softc *sc_parent;
};

static int genfb_grfbus_ioctl(void *, void *, u_long, void *, int, lwp_t *);
static paddr_t genfb_grfbus_mmap(void *, void *, off_t, int);

static struct genfb_ops gfb_ops = {
       .genfb_ioctl = genfb_grfbus_ioctl,
       .genfb_mmap = genfb_grfbus_mmap,
};

static struct genfb_colormap_callback gfb_cmcb;

static int __unused
genfb_grfbus_is_console(paddr_t addr)
{

       if (addr != mac68k_video.mv_phys &&
           (addr >= 0xf9000000 && addr <= 0xfeffffff)) {
               /*
                * This is in the NuBus standard slot space range, so we
                * may well have to look at 0xFssxxxxx, too.  Mask off the
                * slot number and duplicate it in bits 20-23, per IM:V
                * pp 459, 463, and IM:VI ch 30 p 17.
                * Note:  this is an ugly hack and I wish I knew what
                * to do about it.  -- sr
                */
               addr = (paddr_t)(((u_long)addr & 0xff0fffff) |
                   (((u_long)addr & 0x0f000000) >> 4));
       }
       return ((mac68k_machine.serial_console & 0x03) == 0
           && (addr == mac68k_video.mv_phys));
}

static int
genfb_grfbus_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, lwp_t *l)
{
       struct genfb_grfbus_softc * const sc = v;
#if 0
       struct wsdisplayio_bus_id *busid;
#endif
       struct wsdisplayio_fbinfo *fbi;
       struct rasops_info *ri;
       int error;
       u_int video;

       switch (cmd) {
       case WSDISPLAYIO_GTYPE:
               *(u_int *)data = WSDISPLAY_TYPE_GENFB;
               return 0;
#if 0
       case WSDISPLAYIO_GET_BUSID:
               busid = data;
               busid->bus_type = WSDISPLAYIO_BUS_GRFBUS;
               return 0;
#endif
       case WSDISPLAYIO_GET_FBINFO:
               fbi = data;
               ri = &sc->sc_gen.vd.active->scr_ri;
               error = wsdisplayio_get_fbinfo(ri, fbi);
               if (error == 0) {
                       /*
                        * XXX
                        * if the fb isn't page aligned, tell wsfb to skip the
                        * unaligned part
                        */
                       fbi->fbi_fboffset = m68k_page_offset(sc->sc_paddr);
               }
               return error;
       case WSDISPLAYIO_SVIDEO:
               video = *(u_int *)data;
               if (video == WSDISPLAYIO_VIDEO_OFF)
                       pmf_event_inject(NULL, PMFE_DISPLAY_OFF);
               else if (video == WSDISPLAYIO_VIDEO_ON)
                       pmf_event_inject(NULL, PMFE_DISPLAY_ON);
               else
                       return EINVAL;
               return 0;
       default:
               return EPASSTHROUGH;
       }
}

static paddr_t
genfb_grfbus_mmap(void *v, void *vs, off_t off, int prot)
{
       struct genfb_grfbus_softc * const sc = v;

       if (off < 0 || off >= m68k_page_offset(sc->sc_paddr) +
           sc->sc_gen.sc_fbsize)
               return -1;

       return m68k_btop(m68k_trunc_page(sc->sc_paddr) + off);
}

static int
genfb_grfbus_attach_genfb(struct genfb_grfbus_softc *sc)
{
       device_t dev = sc->sc_gen.sc_dev;
       prop_dictionary_t dict = device_properties(dev);
       bool is_console;

       prop_dictionary_set_uint32(dict, "width", sc->sc_width);
       prop_dictionary_set_uint32(dict, "height", sc->sc_height);
       prop_dictionary_set_uint8(dict, "depth", sc->sc_depth);
       prop_dictionary_set_uint16(dict, "linebytes", sc->sc_stride);

       prop_dictionary_set_uint32(dict, "address", sc->sc_paddr);
       prop_dictionary_set_uint64(dict, "virtual_address", sc->sc_vaddr);

       if (sc->sc_set_mapreg != NULL) {
               gfb_cmcb.gcc_cookie = sc->sc_parent;
               gfb_cmcb.gcc_set_mapreg = sc->sc_set_mapreg;
               prop_dictionary_set_uint64(dict, "cmap_callback",
                   (uint64_t)(uintptr_t)&gfb_cmcb);
       }

       genfb_init(&sc->sc_gen);

       if (sc->sc_gen.sc_width == 0 || sc->sc_gen.sc_fbsize == 0) {
               aprint_normal(": disabled\n");
               return ENXIO;
       }

       aprint_naive("\n");
       aprint_normal(": colormap callback %sprovided\n",
           sc->sc_set_mapreg != NULL ? "" : "not ");

       is_console = genfb_grfbus_is_console(sc->sc_paddr);
       if (is_console)
               aprint_normal_dev(sc->sc_gen.sc_dev,
                   "switching to framebuffer console\n");
       prop_dictionary_set_bool(dict, "is_console", is_console);

       genfb_attach(&sc->sc_gen, &gfb_ops);

       return 0;
}

static int
genfb_grfbus_match(device_t parent, cfdata_t cf, void *aux)
{

       return 1;
}

static void
genfb_grfbus_attach(device_t parent, device_t self, void *aux)
{
       struct genfb_grfbus_softc * const sc = device_private(self);
       struct grfbus_attach_args *ga = aux;
       struct grfmode *gm = ga->ga_grfmode;

       sc->sc_gen.sc_dev = self;

       sc->sc_width = gm->width;
       sc->sc_height = gm->height;

       /*
        * XXX: tested on Quadra 840AV
        */
       sc->sc_depth = gm->psize == 16 ? 15 : gm->psize;

       sc->sc_stride = gm->rowbytes;
       sc->sc_paddr = ga->ga_phys + gm->fboff;
       sc->sc_vaddr = (vaddr_t)gm->fbbase + gm->fboff;
       sc->sc_set_mapreg = ga->ga_set_mapreg;
       sc->sc_parent = ga->ga_parent;

       genfb_grfbus_attach_genfb(sc);
}

CFATTACH_DECL_NEW(genfb_grfbus, sizeof(struct genfb_grfbus_softc),
       genfb_grfbus_match, genfb_grfbus_attach, NULL, NULL);

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