LXR linux/drivers/gpu/drm/nouveau/core/subdev/bios/M0209.c

   1/*
   2 * Copyright 2013 Red Hat Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 * Authors: Ben Skeggs
  23 */
  24
  25#include <subdev/bios.h>
  26#include <subdev/bios/bit.h>
  27#include <subdev/bios/M0209.h>
  28
  29u32
  30nvbios_M0209Te(struct nouveau_bios *bios,
  31               u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
  32{
  33        struct bit_entry bit_M;
  34        u32 data = 0x00000000;
  35
  36        if (!bit_entry(bios, 'M', &bit_M)) {
  37                if (bit_M.version == 2 && bit_M.length > 0x0c)
  38                        data = nv_ro32(bios, bit_M.offset + 0x09);
  39                if (data) {
  40                        *ver = nv_ro08(bios, data + 0x00);
  41                        switch (*ver) {
  42                        case 0x10:
  43                                *hdr = nv_ro08(bios, data + 0x01);
  44                                *len = nv_ro08(bios, data + 0x02);
  45                                *ssz = nv_ro08(bios, data + 0x03);
  46                                *snr = 1;
  47                                *cnt = nv_ro08(bios, data + 0x04);
  48                                return data;
  49                        default:
  50                                break;
  51                        }
  52                }
  53        }
  54
  55        return 0x00000000;
  56}
  57
  58u32
  59nvbios_M0209Ee(struct nouveau_bios *bios, int idx,
  60               u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  61{
  62        u8  snr, ssz;
  63        u32 data = nvbios_M0209Te(bios, ver, hdr, cnt, len, &snr, &ssz);
  64        if (data && idx < *cnt) {
  65                data = data + *hdr + idx * (*len + (snr * ssz));
  66                *hdr = *len;
  67                *cnt = snr;
  68                *len = ssz;
  69                return data;
  70        }
  71        return 0x00000000;
  72}
  73
  74u32
  75nvbios_M0209Ep(struct nouveau_bios *bios, int idx,
  76               u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
  77               struct nvbios_M0209E *info)
  78{
  79        u32 data = nvbios_M0209Ee(bios, idx, ver, hdr, cnt, len);
  80        memset(info, 0x00, sizeof(*info));
  81        switch (!!data * *ver) {
  82        case 0x10:
  83                info->v00_40 = (nv_ro08(bios, data + 0x00) & 0x40) >> 6;
  84                info->bits   =  nv_ro08(bios, data + 0x00) & 0x3f;
  85                info->modulo =  nv_ro08(bios, data + 0x01);
  86                info->v02_40 = (nv_ro08(bios, data + 0x02) & 0x40) >> 6;
  87                info->v02_07 =  nv_ro08(bios, data + 0x02) & 0x07;
  88                info->v03    =  nv_ro08(bios, data + 0x03);
  89                return data;
  90        default:
  91                break;
  92        }
  93        return 0x00000000;
  94}
  95
  96u32
  97nvbios_M0209Se(struct nouveau_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
  98{
  99
 100        u8  cnt, len;
 101        u32 data = nvbios_M0209Ee(bios, ent, ver, hdr, &cnt, &len);
 102        if (data && idx < cnt) {
 103                data = data + *hdr + idx * len;
 104                *hdr = len;
 105                return data;
 106        }
 107        return 0x00000000;
 108}
 109
 110u32
 111nvbios_M0209Sp(struct nouveau_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
 112               struct nvbios_M0209S *info)
 113{
 114        struct nvbios_M0209E M0209E;
 115        u8  cnt, len;
 116        u32 data = nvbios_M0209Ep(bios, ent, ver, hdr, &cnt, &len, &M0209E);
 117        if (data) {
 118                u32 i, data = nvbios_M0209Se(bios, ent, idx, ver, hdr);
 119                memset(info, 0x00, sizeof(*info));
 120                switch (!!data * *ver) {
 121                case 0x10:
 122                        for (i = 0; i < ARRAY_SIZE(info->data); i++) {
 123                                u32 bits = (i % M0209E.modulo) * M0209E.bits;
 124                                u32 mask = (1ULL << M0209E.bits) - 1;
 125                                u16  off = bits / 8;
 126                                u8   mod = bits % 8;
 127                                info->data[i] = nv_ro32(bios, data + off);
 128                                info->data[i] = info->data[i] >> mod;
 129                                info->data[i] = info->data[i] & mask;
 130                        }
 131                        return data;
 132                default:
 133                        break;
 134                }
 135        }
 136        return 0x00000000;
 137}
 138