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 25 #include "core/device.h" 26 27 #include "subdev/bios.h" 28 #include "subdev/bios/dcb.h" 29 30 u16 31 dcb_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 32 { 33 struct nouveau_device *device = nv_device(bios); 34 u16 dcb = 0x0000; 35 36 if (device->card_type > NV_04) 37 dcb = nv_ro16(bios, 0x36); 38 if (!dcb) { 39 nv_warn(bios, "DCB table not found\n"); 40 return dcb; 41 } 42 43 *ver = nv_ro08(bios, dcb); 44 45 if (*ver >= 0x42) { 46 nv_warn(bios, "DCB version 0x%02x unknown\n", *ver); 47 return 0x0000; 48 } else 49 if (*ver >= 0x30) { 50 if (nv_ro32(bios, dcb + 6) == 0x4edcbdcb) { 51 *hdr = nv_ro08(bios, dcb + 1); 52 *cnt = nv_ro08(bios, dcb + 2); 53 *len = nv_ro08(bios, dcb + 3); 54 return dcb; 55 } 56 } else 57 if (*ver >= 0x20) { 58 if (nv_ro32(bios, dcb + 4) == 0x4edcbdcb) { 59 u16 i2c = nv_ro16(bios, dcb + 2); 60 *hdr = 8; 61 *cnt = (i2c - dcb) / 8; 62 *len = 8; 63 return dcb; 64 } 65 } else 66 if (*ver >= 0x15) { 67 if (!nv_memcmp(bios, dcb - 7, "DEV_REC", 7)) { 68 u16 i2c = nv_ro16(bios, dcb + 2); 69 *hdr = 4; 70 *cnt = (i2c - dcb) / 10; 71 *len = 10; 72 return dcb; 73 } 74 } else { 75 /* 76 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but 77 * always has the same single (crt) entry, even when tv-out 78 * present, so the conclusion is this version cannot really 79 * be used. 80 * 81 * v1.2 tables (some NV6/10, and NV15+) normally have the 82 * same 5 entries, which are not specific to the card and so 83 * no use. 84 * 85 * v1.2 does have an I2C table that read_dcb_i2c_table can 86 * handle, but cards exist (nv11 in #14821) with a bad i2c 87 * table pointer, so use the indices parsed in 88 * parse_bmp_structure. 89 * 90 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful 91 */ 92 nv_warn(bios, "DCB contains no useful data\n"); 93 return 0x0000; 94 } 95 96 nv_warn(bios, "DCB header validation failed\n"); 97 return 0x0000; 98 } 99 100 u16 101 dcb_outp(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len) 102 { 103 u8 hdr, cnt; 104 u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len); 105 if (dcb && idx < cnt) 106 return dcb + hdr + (idx * *len); 107 return 0x0000; 108 } 109 110 static inline u16 111 dcb_outp_hasht(struct dcb_output *outp) 112 { 113 return (outp->extdev << 8) | (outp->location << 4) | outp->type; 114 } 115 116 static inline u16 117 dcb_outp_hashm(struct dcb_output *outp) 118 { 119 return (outp->heads << 8) | (outp->link << 6) | outp->or; 120 } 121 122 u16 123 dcb_outp_parse(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len, 124 struct dcb_output *outp) 125 { 126 u16 dcb = dcb_outp(bios, idx, ver, len); 127 memset(outp, 0x00, sizeof(*outp)); 128 if (dcb) { 129 if (*ver >= 0x20) { 130 u32 conn = nv_ro32(bios, dcb + 0x00); 131 outp->or = (conn & 0x0f000000) >> 24; 132 outp->location = (conn & 0x00300000) >> 20; 133 outp->bus = (conn & 0x000f0000) >> 16; 134 outp->connector = (conn & 0x0000f000) >> 12; 135 outp->heads = (conn & 0x00000f00) >> 8; 136 outp->i2c_index = (conn & 0x000000f0) >> 4; 137 outp->type = (conn & 0x0000000f); 138 outp->link = 0; 139 } else { 140 dcb = 0x0000; 141 } 142 143 if (*ver >= 0x40) { 144 u32 conf = nv_ro32(bios, dcb + 0x04); 145 switch (outp->type) { 146 case DCB_OUTPUT_DP: 147 switch (conf & 0x00e00000) { 148 case 0x00000000: 149 outp->dpconf.link_bw = 0x06; 150 break; 151 case 0x00200000: 152 outp->dpconf.link_bw = 0x0a; 153 break; 154 case 0x00400000: 155 default: 156 outp->dpconf.link_bw = 0x14; 157 break; 158 } 159 160 outp->dpconf.link_nr = (conf & 0x0f000000) >> 24; 161 if (*ver < 0x41) { 162 switch (outp->dpconf.link_nr) { 163 case 0x0f: 164 outp->dpconf.link_nr = 4; 165 break; 166 case 0x03: 167 outp->dpconf.link_nr = 2; 168 break; 169 case 0x01: 170 default: 171 outp->dpconf.link_nr = 1; 172 break; 173 } 174 } 175 176 /* fall-through... */ 177 case DCB_OUTPUT_TMDS: 178 case DCB_OUTPUT_LVDS: 179 outp->link = (conf & 0x00000030) >> 4; 180 outp->sorconf.link = outp->link; /*XXX*/ 181 outp->extdev = 0x00; 182 if (outp->location != 0) 183 outp->extdev = (conf & 0x0000ff00) >> 8; 184 break; 185 default: 186 break; 187 } 188 } 189 190 outp->hasht = dcb_outp_hasht(outp); 191 outp->hashm = dcb_outp_hashm(outp); 192 } 193 return dcb; 194 } 195 196 u16 197 dcb_outp_match(struct nouveau_bios *bios, u16 type, u16 mask, 198 u8 *ver, u8 *len, struct dcb_output *outp) 199 { 200 u16 dcb, idx = 0; 201 while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) { 202 if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) { 203 if ((dcb_outp_hashm(outp) & mask) == mask) 204 break; 205 } 206 } 207 return dcb; 208 } 209 210 int 211 dcb_outp_foreach(struct nouveau_bios *bios, void *data, 212 int (*exec)(struct nouveau_bios *, void *, int, u16)) 213 { 214 int ret, idx = -1; 215 u8 ver, len; 216 u16 outp; 217 218 while ((outp = dcb_outp(bios, ++idx, &ver, &len))) { 219 if (nv_ro32(bios, outp) == 0x00000000) 220 break; /* seen on an NV11 with DCB v1.5 */ 221 if (nv_ro32(bios, outp) == 0xffffffff) 222 break; /* seen on an NV17 with DCB v2.0 */ 223 224 if (nv_ro08(bios, outp) == DCB_OUTPUT_UNUSED) 225 continue; 226 if (nv_ro08(bios, outp) == DCB_OUTPUT_EOL) 227 break; 228 229 ret = exec(bios, data, idx, outp); 230 if (ret) 231 return ret; 232 } 233 234 return 0; 235 } 236