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 "priv.h" 25 26 #include <subdev/bios.h> 27 #include <subdev/bios/bmp.h> 28 #include <subdev/bios/bit.h> 29 30 u8 31 nvbios_checksum(const u8 *data, int size) 32 { 33 u8 sum = 0; 34 while (size--) 35 sum += *data++; 36 return sum; 37 } 38 39 u16 40 nvbios_findstr(const u8 *data, int size, const char *str, int len) 41 { 42 int i, j; 43 44 for (i = 0; i <= (size - len); i++) { 45 for (j = 0; j < len; j++) 46 if ((char)data[i + j] != str[j]) 47 break; 48 if (j == len) 49 return i; 50 } 51 52 return 0; 53 } 54 55 int 56 nvbios_extend(struct nvkm_bios *bios, u32 length) 57 { 58 if (bios->size < length) { 59 u8 *prev = bios->data; 60 if (!(bios->data = kmalloc(length, GFP_KERNEL))) { 61 bios->data = prev; 62 return -ENOMEM; 63 } 64 memcpy(bios->data, prev, bios->size); 65 bios->size = length; 66 kfree(prev); 67 return 1; 68 } 69 return 0; 70 } 71 72 static u8 73 nvkm_bios_rd08(struct nvkm_object *object, u64 addr) 74 { 75 struct nvkm_bios *bios = (void *)object; 76 return bios->data[addr]; 77 } 78 79 static u16 80 nvkm_bios_rd16(struct nvkm_object *object, u64 addr) 81 { 82 struct nvkm_bios *bios = (void *)object; 83 return get_unaligned_le16(&bios->data[addr]); 84 } 85 86 static u32 87 nvkm_bios_rd32(struct nvkm_object *object, u64 addr) 88 { 89 struct nvkm_bios *bios = (void *)object; 90 return get_unaligned_le32(&bios->data[addr]); 91 } 92 93 static void 94 nvkm_bios_wr08(struct nvkm_object *object, u64 addr, u8 data) 95 { 96 struct nvkm_bios *bios = (void *)object; 97 bios->data[addr] = data; 98 } 99 100 static void 101 nvkm_bios_wr16(struct nvkm_object *object, u64 addr, u16 data) 102 { 103 struct nvkm_bios *bios = (void *)object; 104 put_unaligned_le16(data, &bios->data[addr]); 105 } 106 107 static void 108 nvkm_bios_wr32(struct nvkm_object *object, u64 addr, u32 data) 109 { 110 struct nvkm_bios *bios = (void *)object; 111 put_unaligned_le32(data, &bios->data[addr]); 112 } 113 114 static int 115 nvkm_bios_ctor(struct nvkm_object *parent, struct nvkm_object *engine, 116 struct nvkm_oclass *oclass, void *data, u32 size, 117 struct nvkm_object **pobject) 118 { 119 struct nvkm_bios *bios; 120 struct bit_entry bit_i; 121 int ret; 122 123 ret = nvkm_subdev_create(parent, engine, oclass, 0, 124 "VBIOS", "bios", &bios); 125 *pobject = nv_object(bios); 126 if (ret) 127 return ret; 128 129 ret = nvbios_shadow(bios); 130 if (ret) 131 return ret; 132 133 /* detect type of vbios we're dealing with */ 134 bios->bmp_offset = nvbios_findstr(bios->data, bios->size, 135 "\xff\x7f""NV\0", 5); 136 if (bios->bmp_offset) { 137 nv_info(bios, "BMP version %x.%x\n", 138 bmp_version(bios) >> 8, 139 bmp_version(bios) & 0xff); 140 } 141 142 bios->bit_offset = nvbios_findstr(bios->data, bios->size, 143 "\xff\xb8""BIT", 5); 144 if (bios->bit_offset) 145 nv_info(bios, "BIT signature found\n"); 146 147 /* determine the vbios version number */ 148 if (!bit_entry(bios, 'i', &bit_i) && bit_i.length >= 4) { 149 bios->version.major = nv_ro08(bios, bit_i.offset + 3); 150 bios->version.chip = nv_ro08(bios, bit_i.offset + 2); 151 bios->version.minor = nv_ro08(bios, bit_i.offset + 1); 152 bios->version.micro = nv_ro08(bios, bit_i.offset + 0); 153 bios->version.patch = nv_ro08(bios, bit_i.offset + 4); 154 } else 155 if (bmp_version(bios)) { 156 bios->version.major = nv_ro08(bios, bios->bmp_offset + 13); 157 bios->version.chip = nv_ro08(bios, bios->bmp_offset + 12); 158 bios->version.minor = nv_ro08(bios, bios->bmp_offset + 11); 159 bios->version.micro = nv_ro08(bios, bios->bmp_offset + 10); 160 } 161 162 nv_info(bios, "version %02x.%02x.%02x.%02x.%02x\n", 163 bios->version.major, bios->version.chip, 164 bios->version.minor, bios->version.micro, bios->version.patch); 165 166 return 0; 167 } 168 169 static void 170 nvkm_bios_dtor(struct nvkm_object *object) 171 { 172 struct nvkm_bios *bios = (void *)object; 173 kfree(bios->data); 174 nvkm_subdev_destroy(&bios->subdev); 175 } 176 177 static int 178 nvkm_bios_init(struct nvkm_object *object) 179 { 180 struct nvkm_bios *bios = (void *)object; 181 return nvkm_subdev_init(&bios->subdev); 182 } 183 184 static int 185 nvkm_bios_fini(struct nvkm_object *object, bool suspend) 186 { 187 struct nvkm_bios *bios = (void *)object; 188 return nvkm_subdev_fini(&bios->subdev, suspend); 189 } 190 191 struct nvkm_oclass 192 nvkm_bios_oclass = { 193 .handle = NV_SUBDEV(VBIOS, 0x00), 194 .ofuncs = &(struct nvkm_ofuncs) { 195 .ctor = nvkm_bios_ctor, 196 .dtor = nvkm_bios_dtor, 197 .init = nvkm_bios_init, 198 .fini = nvkm_bios_fini, 199 .rd08 = nvkm_bios_rd08, 200 .rd16 = nvkm_bios_rd16, 201 .rd32 = nvkm_bios_rd32, 202 .wr08 = nvkm_bios_wr08, 203 .wr16 = nvkm_bios_wr16, 204 .wr32 = nvkm_bios_wr32, 205 }, 206 }; 207