| /* |
| * Copyright 2014 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/M0203.h> |
| |
| u32 |
| nvbios_M0203Te(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
| { |
| struct bit_entry bit_M; |
| u32 data = 0x00000000; |
| |
| if (!bit_entry(bios, 'M', &bit_M)) { |
| if (bit_M.version == 2 && bit_M.length > 0x04) |
| data = nv_ro16(bios, bit_M.offset + 0x03); |
| if (data) { |
| *ver = nv_ro08(bios, data + 0x00); |
| switch (*ver) { |
| case 0x10: |
| *hdr = nv_ro08(bios, data + 0x01); |
| *len = nv_ro08(bios, data + 0x02); |
| *cnt = nv_ro08(bios, data + 0x03); |
| return data; |
| default: |
| break; |
| } |
| } |
| } |
| |
| return 0x00000000; |
| } |
| |
| u32 |
| nvbios_M0203Tp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, |
| struct nvbios_M0203T *info) |
| { |
| u32 data = nvbios_M0203Te(bios, ver, hdr, cnt, len); |
| memset(info, 0x00, sizeof(*info)); |
| switch (!!data * *ver) { |
| case 0x10: |
| info->type = nv_ro08(bios, data + 0x04); |
| info->pointer = nv_ro16(bios, data + 0x05); |
| break; |
| default: |
| break; |
| } |
| return data; |
| } |
| |
| u32 |
| nvbios_M0203Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) |
| { |
| u8 cnt, len; |
| u32 data = nvbios_M0203Te(bios, ver, hdr, &cnt, &len); |
| if (data && idx < cnt) { |
| data = data + *hdr + idx * len; |
| *hdr = len; |
| return data; |
| } |
| return 0x00000000; |
| } |
| |
| u32 |
| nvbios_M0203Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, |
| struct nvbios_M0203E *info) |
| { |
| u32 data = nvbios_M0203Ee(bios, idx, ver, hdr); |
| memset(info, 0x00, sizeof(*info)); |
| switch (!!data * *ver) { |
| case 0x10: |
| info->type = (nv_ro08(bios, data + 0x00) & 0x0f) >> 0; |
| info->strap = (nv_ro08(bios, data + 0x00) & 0xf0) >> 4; |
| info->group = (nv_ro08(bios, data + 0x01) & 0x0f) >> 0; |
| return data; |
| default: |
| break; |
| } |
| return 0x00000000; |
| } |
| |
| u32 |
| nvbios_M0203Em(struct nvkm_bios *bios, u8 ramcfg, u8 *ver, u8 *hdr, |
| struct nvbios_M0203E *info) |
| { |
| struct nvbios_M0203T M0203T; |
| u8 cnt, len, idx = 0xff; |
| u32 data; |
| |
| if (!nvbios_M0203Tp(bios, ver, hdr, &cnt, &len, &M0203T)) { |
| nv_warn(bios, "M0203T not found\n"); |
| return 0x00000000; |
| } |
| |
| while ((data = nvbios_M0203Ep(bios, ++idx, ver, hdr, info))) { |
| switch (M0203T.type) { |
| case M0203T_TYPE_RAMCFG: |
| if (info->strap != ramcfg) |
| continue; |
| return data; |
| default: |
| nv_warn(bios, "M0203T type %02x\n", M0203T.type); |
| return 0x00000000; |
| } |
| } |
| |
| return data; |
| } |
