subdev/bios/P0260.c

0001 /*
0002  * Copyright 2013 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Ben Skeggs
0023  */
0024 #include <subdev/bios.h>
0025 #include <subdev/bios/bit.h>
0026 #include <subdev/bios/P0260.h>
0027
0028 u32
0029 nvbios_P0260Te(struct nvkm_bios *bios,
0030            u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz)
0031 {
0032     struct bit_entry bit_P;
0033     u32 data = 0x00000000;
0034
0035     if (!bit_entry(bios, 'P', &bit_P)) {
0036         if (bit_P.version == 2 && bit_P.length > 0x63)
0037             data = nvbios_rd32(bios, bit_P.offset + 0x60);
0038         if (data) {
0039             *ver = nvbios_rd08(bios, data + 0);
0040             switch (*ver) {
0041             case 0x10:
0042                 *hdr = nvbios_rd08(bios, data + 1);
0043                 *cnt = nvbios_rd08(bios, data + 2);
0044                 *len = 4;
0045                 *xnr = nvbios_rd08(bios, data + 3);
0046                 *xsz = 4;
0047                 return data;
0048             default:
0049                 break;
0050             }
0051         }
0052     }
0053
0054     return 0x00000000;
0055 }
0056
0057 u32
0058 nvbios_P0260Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
0059 {
0060     u8  hdr, cnt, xnr, xsz;
0061     u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, len, &xnr, &xsz);
0062     if (data && idx < cnt)
0063         return data + hdr + (idx * *len);
0064     return 0x00000000;
0065 }
0066
0067 u32
0068 nvbios_P0260Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
0069            struct nvbios_P0260E *info)
0070 {
0071     u32 data = nvbios_P0260Ee(bios, idx, ver, len);
0072     memset(info, 0x00, sizeof(*info));
0073     switch (!!data * *ver) {
0074     case 0x10:
0075         info->data = nvbios_rd32(bios, data);
0076         return data;
0077     default:
0078         break;
0079     }
0080     return 0x00000000;
0081 }
0082
0083 u32
0084 nvbios_P0260Xe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *xsz)
0085 {
0086     u8  hdr, cnt, len, xnr;
0087     u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, &len, &xnr, xsz);
0088     if (data && idx < xnr)
0089         return data + hdr + (cnt * len) + (idx * *xsz);
0090     return 0x00000000;
0091 }
0092
0093 u32
0094 nvbios_P0260Xp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
0095            struct nvbios_P0260X *info)
0096 {
0097     u32 data = nvbios_P0260Xe(bios, idx, ver, hdr);
0098     memset(info, 0x00, sizeof(*info));
0099     switch (!!data * *ver) {
0100     case 0x10:
0101         info->data = nvbios_rd32(bios, data);
0102         return data;
0103     default:
0104         break;
0105     }
0106     return 0x00000000;
0107 }