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