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 nvkm_subdev *subdev = &bios->subdev; 33 struct nvbios_pcirT pcir; 34 struct nvbios_npdeT npde; 35 u8 ver; 36 u16 hdr; 37 u32 data; 38 39 switch ((data = nvbios_rd16(bios, image->base + 0x00))) { 40 case 0xaa55: 41 case 0xbb77: 42 case 0x4e56: /* NV */ 43 break; 44 default: 45 nvkm_debug(subdev, "%08x: ROM signature (%04x) unknown\n", 46 image->base, data); 47 return false; 48 } 49 50 if (!(data = nvbios_pcirTp(bios, image->base, &ver, &hdr, &pcir))) 51 return false; 52 image->size = pcir.image_size; 53 image->type = pcir.image_type; 54 image->last = pcir.last; 55 56 if (image->type != 0x70) { 57 if (!(data = nvbios_npdeTp(bios, image->base, &npde))) 58 return true; 59 image->size = npde.image_size; 60 image->last = npde.last; 61 } else { 62 image->last = true; 63 } 64 65 return true; 66 } 67 68 bool 69 nvbios_image(struct nvkm_bios *bios, int idx, struct nvbios_image *image) 70 { 71 memset(image, 0x00, sizeof(*image)); 72 do { 73 image->base += image->size; 74 if (image->last || !nvbios_imagen(bios, image)) 75 return false; 76 } while(idx--); 77 return true; 78 } 79