mxm.c (3861B)
1/* 2 * Copyright 2012 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#include <subdev/bios.h> 25#include <subdev/bios/bit.h> 26#include <subdev/bios/mxm.h> 27 28u16 29mxm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr) 30{ 31 struct nvkm_subdev *subdev = &bios->subdev; 32 struct bit_entry x; 33 34 if (bit_entry(bios, 'x', &x)) { 35 nvkm_debug(subdev, "BIT 'x' table not present\n"); 36 return 0x0000; 37 } 38 39 *ver = x.version; 40 *hdr = x.length; 41 if (*ver != 1 || *hdr < 3) { 42 nvkm_warn(subdev, "BIT 'x' table %d/%d unknown\n", *ver, *hdr); 43 return 0x0000; 44 } 45 46 return x.offset; 47} 48 49/* These map MXM v2.x digital connection values to the appropriate SOR/link, 50 * hopefully they're correct for all boards within the same chipset... 51 * 52 * MXM v3.x VBIOS are nicer and provide pointers to these tables. 53 */ 54static u8 g84_sor_map[16] = { 55 0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31, 56 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 57}; 58 59static u8 g92_sor_map[16] = { 60 0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31, 61 0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 62}; 63 64static u8 g94_sor_map[16] = { 65 0x00, 0x14, 0x24, 0x11, 0x34, 0x31, 0x11, 0x31, 66 0x11, 0x31, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00 67}; 68 69static u8 g98_sor_map[16] = { 70 0x00, 0x14, 0x12, 0x11, 0x00, 0x31, 0x11, 0x31, 71 0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 72}; 73 74u8 75mxm_sor_map(struct nvkm_bios *bios, u8 conn) 76{ 77 struct nvkm_subdev *subdev = &bios->subdev; 78 u8 ver, hdr; 79 u16 mxm = mxm_table(bios, &ver, &hdr); 80 if (mxm && hdr >= 6) { 81 u16 map = nvbios_rd16(bios, mxm + 4); 82 if (map) { 83 ver = nvbios_rd08(bios, map); 84 if (ver == 0x10 || ver == 0x11) { 85 if (conn < nvbios_rd08(bios, map + 3)) { 86 map += nvbios_rd08(bios, map + 1); 87 map += conn; 88 return nvbios_rd08(bios, map); 89 } 90 91 return 0x00; 92 } 93 94 nvkm_warn(subdev, "unknown sor map v%02x\n", ver); 95 } 96 } 97 98 if (bios->version.chip == 0x84 || bios->version.chip == 0x86) 99 return g84_sor_map[conn]; 100 if (bios->version.chip == 0x92) 101 return g92_sor_map[conn]; 102 if (bios->version.chip == 0x94 || bios->version.chip == 0x96) 103 return g94_sor_map[conn]; 104 if (bios->version.chip == 0x98) 105 return g98_sor_map[conn]; 106 107 nvkm_warn(subdev, "missing sor map\n"); 108 return 0x00; 109} 110 111u8 112mxm_ddc_map(struct nvkm_bios *bios, u8 port) 113{ 114 struct nvkm_subdev *subdev = &bios->subdev; 115 u8 ver, hdr; 116 u16 mxm = mxm_table(bios, &ver, &hdr); 117 if (mxm && hdr >= 8) { 118 u16 map = nvbios_rd16(bios, mxm + 6); 119 if (map) { 120 ver = nvbios_rd08(bios, map); 121 if (ver == 0x10) { 122 if (port < nvbios_rd08(bios, map + 3)) { 123 map += nvbios_rd08(bios, map + 1); 124 map += port; 125 return nvbios_rd08(bios, map); 126 } 127 128 return 0x00; 129 } 130 131 nvkm_warn(subdev, "unknown ddc map v%02x\n", ver); 132 } 133 } 134 135 /* v2.x: directly write port as dcb i2cidx */ 136 return (port << 4) | port; 137}