/*
 * 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 <subdev/bios.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/M0209.h>

u32
nvbios_M0209Te(struct nvkm_bios *bios,
               u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
{
        struct bit_entry bit_M;
        u32 data = 0x00000000;

        if (!bit_entry(bios, 'M', &bit_M)) {
                if (bit_M.version == 2 && bit_M.length > 0x0c)
                        data = nvbios_rd32(bios, bit_M.offset + 0x09);
                if (data) {
                        *ver = nvbios_rd08(bios, data + 0x00);
                        switch (*ver) {
                        case 0x10:
                                *hdr = nvbios_rd08(bios, data + 0x01);
                                *len = nvbios_rd08(bios, data + 0x02);
                                *ssz = nvbios_rd08(bios, data + 0x03);
                                *snr = 1;
                                *cnt = nvbios_rd08(bios, data + 0x04);
                                return data;
                        default:
                                break;
                        }
                }
        }

        return 0x00000000;
}

u32
nvbios_M0209Ee(struct nvkm_bios *bios, int idx,
               u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
{
        u8  snr, ssz;
        u32 data = nvbios_M0209Te(bios, ver, hdr, cnt, len, &snr, &ssz);
        if (data && idx < *cnt) {
                data = data + *hdr + idx * (*len + (snr * ssz));
                *hdr = *len;
                *cnt = snr;
                *len = ssz;
                return data;
        }
        return 0x00000000;
}

u32
nvbios_M0209Ep(struct nvkm_bios *bios, int idx,
               u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_M0209E *info)
{
        u32 data = nvbios_M0209Ee(bios, idx, ver, hdr, cnt, len);
        memset(info, 0x00, sizeof(*info));
        switch (!!data * *ver) {
        case 0x10:
                info->v00_40 = (nvbios_rd08(bios, data + 0x00) & 0x40) >> 6;
                info->bits   =  nvbios_rd08(bios, data + 0x00) & 0x3f;
                info->modulo =  nvbios_rd08(bios, data + 0x01);
                info->v02_40 = (nvbios_rd08(bios, data + 0x02) & 0x40) >> 6;
                info->v02_07 =  nvbios_rd08(bios, data + 0x02) & 0x07;
                info->v03    =  nvbios_rd08(bios, data + 0x03);
                return data;
        default:
                break;
        }
        return 0x00000000;
}

u32
nvbios_M0209Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
{

        u8  cnt, len;
        u32 data = nvbios_M0209Ee(bios, ent, ver, hdr, &cnt, &len);
        if (data && idx < cnt) {
                data = data + *hdr + idx * len;
                *hdr = len;
                return data;
        }
        return 0x00000000;
}

u32
nvbios_M0209Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
               struct nvbios_M0209S *info)
{
        struct nvbios_M0209E M0209E;
        u8  cnt, len;
        u32 data = nvbios_M0209Ep(bios, ent, ver, hdr, &cnt, &len, &M0209E);
        if (data) {
                u32 i, data = nvbios_M0209Se(bios, ent, idx, ver, hdr);
                memset(info, 0x00, sizeof(*info));
                switch (!!data * *ver) {
                case 0x10:
                        for (i = 0; i < ARRAY_SIZE(info->data); i++) {
                                u32 bits = (i % M0209E.modulo) * M0209E.bits;
                                u32 mask = (1ULL << M0209E.bits) - 1;
                                u16  off = bits / 8;
                                u8   mod = bits % 8;
                                info->data[i] = nvbios_rd32(bios, data + off);
                                info->data[i] = info->data[i] >> mod;
                                info->data[i] = info->data[i] & mask;
                        }
                        return data;
                default:
                        break;
                }
        }
        return 0x00000000;
}