1 /* $NetBSD: nouveau_nvkm_subdev_bios_disp.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $ */ 2 3 /* 4 * Copyright 2012 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs 25 */ 26 #include <sys/cdefs.h> 27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_disp.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $"); 28 29 #include <subdev/bios.h> 30 #include <subdev/bios/bit.h> 31 #include <subdev/bios/disp.h> 32 33 u16 34 nvbios_disp_table(struct nvkm_bios *bios, 35 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *sub) 36 { 37 struct bit_entry U; 38 39 if (!bit_entry(bios, 'U', &U)) { 40 if (U.version == 1) { 41 u16 data = nvbios_rd16(bios, U.offset); 42 if (data) { 43 *ver = nvbios_rd08(bios, data + 0x00); 44 switch (*ver) { 45 case 0x20: 46 case 0x21: 47 case 0x22: 48 *hdr = nvbios_rd08(bios, data + 0x01); 49 *len = nvbios_rd08(bios, data + 0x02); 50 *cnt = nvbios_rd08(bios, data + 0x03); 51 *sub = nvbios_rd08(bios, data + 0x04); 52 return data; 53 default: 54 break; 55 } 56 } 57 } 58 } 59 60 return 0x0000; 61 } 62 63 u16 64 nvbios_disp_entry(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, u8 *sub) 65 { 66 u8 hdr, cnt; 67 u16 data = nvbios_disp_table(bios, ver, &hdr, &cnt, len, sub); 68 if (data && idx < cnt) 69 return data + hdr + (idx * *len); 70 *ver = 0x00; 71 return 0x0000; 72 } 73 74 u16 75 nvbios_disp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len, u8 *sub, 76 struct nvbios_disp *info) 77 { 78 u16 data = nvbios_disp_entry(bios, idx, ver, len, sub); 79 if (data && *len >= 2) { 80 info->data = nvbios_rd16(bios, data + 0); 81 return data; 82 } 83 return 0x0000; 84 } 85 86 u16 87 nvbios_outp_entry(struct nvkm_bios *bios, u8 idx, 88 u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 89 { 90 struct nvbios_disp info; 91 u16 data = nvbios_disp_parse(bios, idx, ver, len, hdr, &info); 92 if (data) { 93 *cnt = nvbios_rd08(bios, info.data + 0x05); 94 *len = 0x06; 95 data = info.data; 96 } 97 return data; 98 } 99 100 u16 101 nvbios_outp_parse(struct nvkm_bios *bios, u8 idx, 102 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_outp *info) 103 { 104 u16 data = nvbios_outp_entry(bios, idx, ver, hdr, cnt, len); 105 if (data && *hdr >= 0x0a) { 106 info->type = nvbios_rd16(bios, data + 0x00); 107 info->mask = nvbios_rd32(bios, data + 0x02); 108 if (*ver <= 0x20) /* match any link */ 109 info->mask |= 0x00c0; 110 info->script[0] = nvbios_rd16(bios, data + 0x06); 111 info->script[1] = nvbios_rd16(bios, data + 0x08); 112 info->script[2] = 0x0000; 113 if (*hdr >= 0x0c) 114 info->script[2] = nvbios_rd16(bios, data + 0x0a); 115 return data; 116 } 117 return 0x0000; 118 } 119 120 u16 121 nvbios_outp_match(struct nvkm_bios *bios, u16 type, u16 mask, 122 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_outp *info) 123 { 124 u16 data, idx = 0; 125 while ((data = nvbios_outp_parse(bios, idx++, ver, hdr, cnt, len, info)) || *ver) { 126 if (data && info->type == type) { 127 if ((info->mask & mask) == mask) 128 break; 129 } 130 } 131 return data; 132 } 133 134 u16 135 nvbios_ocfg_entry(struct nvkm_bios *bios, u16 outp, u8 idx, 136 u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 137 { 138 if (idx < *cnt) 139 return outp + *hdr + (idx * *len); 140 return 0x0000; 141 } 142 143 u16 144 nvbios_ocfg_parse(struct nvkm_bios *bios, u16 outp, u8 idx, 145 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ocfg *info) 146 { 147 u16 data = nvbios_ocfg_entry(bios, outp, idx, ver, hdr, cnt, len); 148 if (data) { 149 info->proto = nvbios_rd08(bios, data + 0x00); 150 info->flags = nvbios_rd16(bios, data + 0x01); 151 info->clkcmp[0] = nvbios_rd16(bios, data + 0x02); 152 info->clkcmp[1] = nvbios_rd16(bios, data + 0x04); 153 } 154 return data; 155 } 156 157 u16 158 nvbios_ocfg_match(struct nvkm_bios *bios, u16 outp, u8 proto, u8 flags, 159 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_ocfg *info) 160 { 161 u16 data, idx = 0; 162 while ((data = nvbios_ocfg_parse(bios, outp, idx++, ver, hdr, cnt, len, info))) { 163 if ((info->proto == proto || info->proto == 0xff) && 164 (info->flags == flags)) 165 break; 166 } 167 return data; 168 } 169 170 u16 171 nvbios_oclk_match(struct nvkm_bios *bios, u16 cmp, u32 khz) 172 { 173 while (cmp) { 174 if (khz / 10 >= nvbios_rd16(bios, cmp + 0x00)) 175 return nvbios_rd16(bios, cmp + 0x02); 176 cmp += 0x04; 177 } 178 return 0x0000; 179 } 180
Indexes created Thu Sep 25 16:09:42 GMT 2025