1 /* 2 * Copyright 2014 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/M0203.h> 27 28 u32 29 nvbios_M0203Te(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 30 { 31 struct bit_entry bit_M; 32 u32 data = 0x00000000; 33 34 if (!bit_entry(bios, 'M', &bit_M)) { 35 if (bit_M.version == 2 && bit_M.length > 0x04) 36 data = nvbios_rd16(bios, bit_M.offset + 0x03); 37 if (data) { 38 *ver = nvbios_rd08(bios, data + 0x00); 39 switch (*ver) { 40 case 0x10: 41 *hdr = nvbios_rd08(bios, data + 0x01); 42 *len = nvbios_rd08(bios, data + 0x02); 43 *cnt = nvbios_rd08(bios, data + 0x03); 44 return data; 45 default: 46 break; 47 } 48 } 49 } 50 51 return 0x00000000; 52 } 53 54 u32 55 nvbios_M0203Tp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, 56 struct nvbios_M0203T *info) 57 { 58 u32 data = nvbios_M0203Te(bios, ver, hdr, cnt, len); 59 memset(info, 0x00, sizeof(*info)); 60 switch (!!data * *ver) { 61 case 0x10: 62 info->type = nvbios_rd08(bios, data + 0x04); 63 info->pointer = nvbios_rd16(bios, data + 0x05); 64 break; 65 default: 66 break; 67 } 68 return data; 69 } 70 71 u32 72 nvbios_M0203Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) 73 { 74 u8 cnt, len; 75 u32 data = nvbios_M0203Te(bios, ver, hdr, &cnt, &len); 76 if (data && idx < cnt) { 77 data = data + *hdr + idx * len; 78 *hdr = len; 79 return data; 80 } 81 return 0x00000000; 82 } 83 84 u32 85 nvbios_M0203Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, 86 struct nvbios_M0203E *info) 87 { 88 u32 data = nvbios_M0203Ee(bios, idx, ver, hdr); 89 memset(info, 0x00, sizeof(*info)); 90 switch (!!data * *ver) { 91 case 0x10: 92 info->type = (nvbios_rd08(bios, data + 0x00) & 0x0f) >> 0; 93 info->strap = (nvbios_rd08(bios, data + 0x00) & 0xf0) >> 4; 94 info->group = (nvbios_rd08(bios, data + 0x01) & 0x0f) >> 0; 95 return data; 96 default: 97 break; 98 } 99 return 0x00000000; 100 } 101 102 u32 103 nvbios_M0203Em(struct nvkm_bios *bios, u8 ramcfg, u8 *ver, u8 *hdr, 104 struct nvbios_M0203E *info) 105 { 106 struct nvkm_subdev *subdev = &bios->subdev; 107 struct nvbios_M0203T M0203T; 108 u8 cnt, len, idx = 0xff; 109 u32 data; 110 111 if (!nvbios_M0203Tp(bios, ver, hdr, &cnt, &len, &M0203T)) { 112 nvkm_warn(subdev, "M0203T not found\n"); 113 return 0x00000000; 114 } 115 116 while ((data = nvbios_M0203Ep(bios, ++idx, ver, hdr, info))) { 117 switch (M0203T.type) { 118 case M0203T_TYPE_RAMCFG: 119 if (info->strap != ramcfg) 120 continue; 121 return data; 122 default: 123 nvkm_warn(subdev, "M0203T type %02x\n", M0203T.type); 124 return 0x00000000; 125 } 126 } 127 128 return data; 129 } 130