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 <bskeggs@redhat.com> 23 */ 24 #include <subdev/bios.h> 25 #include <subdev/bios/image.h> 26 #include <subdev/bios/pcir.h> 27 #include <subdev/bios/npde.h> 28 29 static bool 30 nvbios_imagen(struct nvkm_bios *bios, struct nvbios_image *image) 31 { 32 struct nvbios_pcirT pcir; 33 struct nvbios_npdeT npde; 34 u8 ver; 35 u16 hdr; 36 u32 data; 37 38 switch ((data = nv_ro16(bios, image->base + 0x00))) { 39 case 0xaa55: 40 case 0xbb77: 41 case 0x4e56: /* NV */ 42 break; 43 default: 44 nv_debug(bios, "%08x: ROM signature (%04x) unknown\n", 45 image->base, data); 46 return false; 47 } 48 49 if (!(data = nvbios_pcirTp(bios, image->base, &ver, &hdr, &pcir))) 50 return false; 51 image->size = pcir.image_size; 52 image->type = pcir.image_type; 53 image->last = pcir.last; 54 55 if (image->type != 0x70) { 56 if (!(data = nvbios_npdeTp(bios, image->base, &npde))) 57 return true; 58 image->size = npde.image_size; 59 image->last = npde.last; 60 } else { 61 image->last = true; 62 } 63 64 return true; 65 } 66 67 bool 68 nvbios_image(struct nvkm_bios *bios, int idx, struct nvbios_image *image) 69 { 70 memset(image, 0x00, sizeof(*image)); 71 do { 72 image->base += image->size; 73 if (image->last || !nvbios_imagen(bios, image)) 74 return false; 75 } while(idx--); 76 return true; 77 } 78