/*
 * Copyright 2013 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */
#include "nv50.h"

#include <subdev/bios.h>
#include <subdev/bios/dcb.h>
#include <subdev/bios/disp.h>
#include <subdev/bios/init.h>
#include <subdev/bios/pll.h>
#include <subdev/clk/pll.h>
#include <subdev/ibus.h>
#include <subdev/vga.h>

int
nv50_devinit_pll_set(struct nvkm_devinit *devinit, u32 type, u32 freq)
{
        struct nv50_devinit_priv *priv = (void *)devinit;
        struct nvkm_bios *bios = nvkm_bios(priv);
        struct nvbios_pll info;
        int N1, M1, N2, M2, P;
        int ret;

        ret = nvbios_pll_parse(bios, type, &info);
        if (ret) {
                nv_error(devinit, "failed to retrieve pll data, %d\n", ret);
                return ret;
        }

        ret = nv04_pll_calc(nv_subdev(devinit), &info, freq, &N1, &M1, &N2, &M2, &P);
        if (!ret) {
                nv_error(devinit, "failed pll calculation\n");
                return ret;
        }

        switch (info.type) {
        case PLL_VPLL0:
        case PLL_VPLL1:
                nv_wr32(priv, info.reg + 0, 0x10000611);
                nv_mask(priv, info.reg + 4, 0x00ff00ff, (M1 << 16) | N1);
                nv_mask(priv, info.reg + 8, 0x7fff00ff, (P  << 28) |
                                                        (M2 << 16) | N2);
                break;
        case PLL_MEMORY:
                nv_mask(priv, info.reg + 0, 0x01ff0000, (P << 22) |
                                                        (info.bias_p << 19) |
                                                        (P << 16));
                nv_wr32(priv, info.reg + 4, (N1 << 8) | M1);
                break;
        default:
                nv_mask(priv, info.reg + 0, 0x00070000, (P << 16));
                nv_wr32(priv, info.reg + 4, (N1 << 8) | M1);
                break;
        }

        return 0;
}

static u64
nv50_devinit_disable(struct nvkm_devinit *devinit)
{
        struct nv50_devinit_priv *priv = (void *)devinit;
        u32 r001540 = nv_rd32(priv, 0x001540);
        u64 disable = 0ULL;

        if (!(r001540 & 0x40000000))
                disable |= (1ULL << NVDEV_ENGINE_MPEG);

        return disable;
}

int
nv50_devinit_init(struct nvkm_object *object)
{
        struct nvkm_bios *bios = nvkm_bios(object);
        struct nvkm_ibus *ibus = nvkm_ibus(object);
        struct nv50_devinit_priv *priv = (void *)object;
        struct nvbios_outp info;
        struct dcb_output outp;
        u8  ver = 0xff, hdr, cnt, len;
        int ret, i = 0;

        if (!priv->base.post) {
                if (!nv_rdvgac(priv, 0, 0x00) &&
                    !nv_rdvgac(priv, 0, 0x1a)) {
                        nv_info(priv, "adaptor not initialised\n");
                        priv->base.post = true;
                }
        }

        /* some boards appear to require certain priv register timeouts
         * to be bumped before runing devinit scripts.  not a clue why
         * the vbios engineers didn't make the scripts just work...
         */
        if (priv->base.post && ibus)
                nv_ofuncs(ibus)->init(nv_object(ibus));

        ret = nvkm_devinit_init(&priv->base);
        if (ret)
                return ret;

        /* if we ran the init tables, we have to execute the first script
         * pointer of each dcb entry's display encoder table in order
         * to properly initialise each encoder.
         */
        while (priv->base.post && dcb_outp_parse(bios, i, &ver, &hdr, &outp)) {
                if (nvbios_outp_match(bios, outp.hasht, outp.hashm,
                                      &ver, &hdr, &cnt, &len, &info)) {
                        struct nvbios_init init = {
                                .subdev = nv_subdev(priv),
                                .bios = bios,
                                .offset = info.script[0],
                                .outp = &outp,
                                .crtc = -1,
                                .execute = 1,
                        };

                        nvbios_exec(&init);
                }
                i++;
        }

        return 0;
}

int
nv50_devinit_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
                  struct nvkm_oclass *oclass, void *data, u32 size,
                  struct nvkm_object **pobject)
{
        struct nv50_devinit_priv *priv;
        int ret;

        ret = nvkm_devinit_create(parent, engine, oclass, &priv);
        *pobject = nv_object(priv);
        if (ret)
                return ret;

        return 0;
}

struct nvkm_oclass *
nv50_devinit_oclass = &(struct nvkm_devinit_impl) {
        .base.handle = NV_SUBDEV(DEVINIT, 0x50),
        .base.ofuncs = &(struct nvkm_ofuncs) {
                .ctor = nv50_devinit_ctor,
                .dtor = _nvkm_devinit_dtor,
                .init = nv50_devinit_init,
                .fini = _nvkm_devinit_fini,
        },
        .pll_set = nv50_devinit_pll_set,
        .disable = nv50_devinit_disable,
        .post = nvbios_init,
}.base;