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/dcb.h> 26 27 u16 28 dcb_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 29 { 30 struct nvkm_device *device = nv_device(bios); 31 u16 dcb = 0x0000; 32 33 if (device->card_type > NV_04) 34 dcb = nv_ro16(bios, 0x36); 35 if (!dcb) { 36 nv_warn(bios, "DCB table not found\n"); 37 return dcb; 38 } 39 40 *ver = nv_ro08(bios, dcb); 41 42 if (*ver >= 0x42) { 43 nv_warn(bios, "DCB version 0x%02x unknown\n", *ver); 44 return 0x0000; 45 } else 46 if (*ver >= 0x30) { 47 if (nv_ro32(bios, dcb + 6) == 0x4edcbdcb) { 48 *hdr = nv_ro08(bios, dcb + 1); 49 *cnt = nv_ro08(bios, dcb + 2); 50 *len = nv_ro08(bios, dcb + 3); 51 return dcb; 52 } 53 } else 54 if (*ver >= 0x20) { 55 if (nv_ro32(bios, dcb + 4) == 0x4edcbdcb) { 56 u16 i2c = nv_ro16(bios, dcb + 2); 57 *hdr = 8; 58 *cnt = (i2c - dcb) / 8; 59 *len = 8; 60 return dcb; 61 } 62 } else 63 if (*ver >= 0x15) { 64 if (!nv_memcmp(bios, dcb - 7, "DEV_REC", 7)) { 65 u16 i2c = nv_ro16(bios, dcb + 2); 66 *hdr = 4; 67 *cnt = (i2c - dcb) / 10; 68 *len = 10; 69 return dcb; 70 } 71 } else { 72 /* 73 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but 74 * always has the same single (crt) entry, even when tv-out 75 * present, so the conclusion is this version cannot really 76 * be used. 77 * 78 * v1.2 tables (some NV6/10, and NV15+) normally have the 79 * same 5 entries, which are not specific to the card and so 80 * no use. 81 * 82 * v1.2 does have an I2C table that read_dcb_i2c_table can 83 * handle, but cards exist (nv11 in #14821) with a bad i2c 84 * table pointer, so use the indices parsed in 85 * parse_bmp_structure. 86 * 87 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful 88 */ 89 nv_warn(bios, "DCB contains no useful data\n"); 90 return 0x0000; 91 } 92 93 nv_warn(bios, "DCB header validation failed\n"); 94 return 0x0000; 95 } 96 97 u16 98 dcb_outp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len) 99 { 100 u8 hdr, cnt; 101 u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len); 102 if (dcb && idx < cnt) 103 return dcb + hdr + (idx * *len); 104 return 0x0000; 105 } 106 107 static inline u16 108 dcb_outp_hasht(struct dcb_output *outp) 109 { 110 return (outp->extdev << 8) | (outp->location << 4) | outp->type; 111 } 112 113 static inline u16 114 dcb_outp_hashm(struct dcb_output *outp) 115 { 116 return (outp->heads << 8) | (outp->link << 6) | outp->or; 117 } 118 119 u16 120 dcb_outp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, 121 struct dcb_output *outp) 122 { 123 u16 dcb = dcb_outp(bios, idx, ver, len); 124 memset(outp, 0x00, sizeof(*outp)); 125 if (dcb) { 126 if (*ver >= 0x20) { 127 u32 conn = nv_ro32(bios, dcb + 0x00); 128 outp->or = (conn & 0x0f000000) >> 24; 129 outp->location = (conn & 0x00300000) >> 20; 130 outp->bus = (conn & 0x000f0000) >> 16; 131 outp->connector = (conn & 0x0000f000) >> 12; 132 outp->heads = (conn & 0x00000f00) >> 8; 133 outp->i2c_index = (conn & 0x000000f0) >> 4; 134 outp->type = (conn & 0x0000000f); 135 outp->link = 0; 136 } else { 137 dcb = 0x0000; 138 } 139 140 if (*ver >= 0x40) { 141 u32 conf = nv_ro32(bios, dcb + 0x04); 142 switch (outp->type) { 143 case DCB_OUTPUT_DP: 144 switch (conf & 0x00e00000) { 145 case 0x00000000: 146 outp->dpconf.link_bw = 0x06; 147 break; 148 case 0x00200000: 149 outp->dpconf.link_bw = 0x0a; 150 break; 151 case 0x00400000: 152 default: 153 outp->dpconf.link_bw = 0x14; 154 break; 155 } 156 157 switch ((conf & 0x0f000000) >> 24) { 158 case 0xf: 159 case 0x4: 160 outp->dpconf.link_nr = 4; 161 break; 162 case 0x3: 163 case 0x2: 164 outp->dpconf.link_nr = 2; 165 break; 166 case 0x1: 167 default: 168 outp->dpconf.link_nr = 1; 169 break; 170 } 171 172 /* fall-through... */ 173 case DCB_OUTPUT_TMDS: 174 case DCB_OUTPUT_LVDS: 175 outp->link = (conf & 0x00000030) >> 4; 176 outp->sorconf.link = outp->link; /*XXX*/ 177 outp->extdev = 0x00; 178 if (outp->location != 0) 179 outp->extdev = (conf & 0x0000ff00) >> 8; 180 break; 181 default: 182 break; 183 } 184 } 185 186 outp->hasht = dcb_outp_hasht(outp); 187 outp->hashm = dcb_outp_hashm(outp); 188 } 189 return dcb; 190 } 191 192 u16 193 dcb_outp_match(struct nvkm_bios *bios, u16 type, u16 mask, 194 u8 *ver, u8 *len, struct dcb_output *outp) 195 { 196 u16 dcb, idx = 0; 197 while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) { 198 if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) { 199 if ((dcb_outp_hashm(outp) & mask) == mask) 200 break; 201 } 202 } 203 return dcb; 204 } 205 206 int 207 dcb_outp_foreach(struct nvkm_bios *bios, void *data, 208 int (*exec)(struct nvkm_bios *, void *, int, u16)) 209 { 210 int ret, idx = -1; 211 u8 ver, len; 212 u16 outp; 213 214 while ((outp = dcb_outp(bios, ++idx, &ver, &len))) { 215 if (nv_ro32(bios, outp) == 0x00000000) 216 break; /* seen on an NV11 with DCB v1.5 */ 217 if (nv_ro32(bios, outp) == 0xffffffff) 218 break; /* seen on an NV17 with DCB v2.0 */ 219 220 if (nv_ro08(bios, outp) == DCB_OUTPUT_UNUSED) 221 continue; 222 if (nv_ro08(bios, outp) == DCB_OUTPUT_EOL) 223 break; 224 225 ret = exec(bios, data, idx, outp); 226 if (ret) 227 return ret; 228 } 229 230 return 0; 231 } 232