| /* |
| * 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 <bskeggs@redhat.com> |
| */ |
| #include <subdev/bios.h> |
| #include <subdev/bios/bit.h> |
| #include <subdev/bios/ramcfg.h> |
| #include <subdev/bios/M0203.h> |
| |
| static u8 |
| nvbios_ramcfg_strap(struct nvkm_subdev *subdev) |
| { |
| return (nvkm_rd32(subdev->device, 0x101000) & 0x0000003c) >> 2; |
| } |
| |
| u8 |
| nvbios_ramcfg_count(struct nvkm_bios *bios) |
| { |
| struct bit_entry bit_M; |
| |
| if (!bit_entry(bios, 'M', &bit_M)) { |
| if (bit_M.version == 1 && bit_M.length >= 5) |
| return nvbios_rd08(bios, bit_M.offset + 2); |
| if (bit_M.version == 2 && bit_M.length >= 3) |
| return nvbios_rd08(bios, bit_M.offset + 0); |
| } |
| |
| return 0x00; |
| } |
| |
| u8 |
| nvbios_ramcfg_index(struct nvkm_subdev *subdev) |
| { |
| struct nvkm_bios *bios = subdev->device->bios; |
| u8 strap = nvbios_ramcfg_strap(subdev); |
| u32 xlat = 0x00000000; |
| struct bit_entry bit_M; |
| struct nvbios_M0203E M0203E; |
| u8 ver, hdr; |
| |
| if (!bit_entry(bios, 'M', &bit_M)) { |
| if (bit_M.version == 1 && bit_M.length >= 5) |
| xlat = nvbios_rd16(bios, bit_M.offset + 3); |
| if (bit_M.version == 2 && bit_M.length >= 3) { |
| /*XXX: is M ever shorter than this? |
| * if not - what is xlat used for now? |
| * also - sigh.. |
| */ |
| if (bit_M.length >= 7 && |
| nvbios_M0203Em(bios, strap, &ver, &hdr, &M0203E)) |
| return M0203E.group; |
| xlat = nvbios_rd16(bios, bit_M.offset + 1); |
| } |
| } |
| |
| if (xlat) |
| strap = nvbios_rd08(bios, xlat + strap); |
| return strap; |
| } |
