| /* |
| * Copyright 2012 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/dcb.h" |
| #include "subdev/bios/dp.h" |
| |
| u16 |
| dp_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
| { |
| struct bit_entry bit_d; |
| |
| if (!bit_entry(bios, 'd', &bit_d)) { |
| if (bit_d.version == 1) { |
| u16 data = nv_ro16(bios, bit_d.offset); |
| if (data) { |
| *ver = nv_ro08(bios, data + 0); |
| *hdr = nv_ro08(bios, data + 1); |
| *len = nv_ro08(bios, data + 2); |
| *cnt = nv_ro08(bios, data + 3); |
| return data; |
| } |
| } |
| } |
| |
| return 0x0000; |
| } |
| |
| u16 |
| dp_outp(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len) |
| { |
| u8 hdr, cnt; |
| u16 table = dp_table(bios, ver, &hdr, &cnt, len); |
| if (table && idx < cnt) |
| return nv_ro16(bios, table + hdr + (idx * *len)); |
| return 0xffff; |
| } |
| |
| u16 |
| dp_outp_match(struct nouveau_bios *bios, struct dcb_output *outp, |
| u8 *ver, u8 *len) |
| { |
| u8 idx = 0; |
| u16 data; |
| while ((data = dp_outp(bios, idx++, ver, len)) != 0xffff) { |
| if (data) { |
| u32 hash = nv_ro32(bios, data); |
| if (dcb_hash_match(outp, hash)) |
| return data; |
| } |
| } |
| return 0x0000; |
| } |
