1 /* 2 * (C) Copyright 2001 3 * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <command.h> 10 #include <asm/unaligned.h> 11 #include "part_iso.h" 12 13 #ifdef HAVE_BLOCK_DEVICE 14 15 /* #define ISO_PART_DEBUG */ 16 17 #ifdef ISO_PART_DEBUG 18 #define PRINTF(fmt,args...) printf (fmt ,##args) 19 #else 20 #define PRINTF(fmt,args...) 21 #endif 22 23 /* enable this if CDs are written with the PowerPC Platform ID */ 24 #undef CHECK_FOR_POWERPC_PLATTFORM 25 #define CD_SECTSIZE 2048 26 27 static unsigned char tmpbuf[CD_SECTSIZE]; 28 29 unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start, 30 lbaint_t blkcnt, void *buffer) 31 { 32 unsigned long ret; 33 34 if (block_dev->blksz == 512) { 35 /* Convert from 2048 to 512 sector size */ 36 start *= 4; 37 blkcnt *= 4; 38 } 39 40 ret = blk_dread(block_dev, start, blkcnt, buffer); 41 42 if (block_dev->blksz == 512) 43 ret /= 4; 44 45 return ret; 46 } 47 48 /* only boot records will be listed as valid partitions */ 49 int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num, 50 disk_partition_t *info, int verb) 51 { 52 int i,offset,entry_num; 53 unsigned short *chksumbuf; 54 unsigned short chksum; 55 unsigned long newblkaddr,blkaddr,lastsect,bootaddr; 56 iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */ 57 iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */ 58 iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf; 59 iso_init_def_entry_t *pide; 60 61 if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512)) 62 return -1; 63 64 /* the first sector (sector 0x10) must be a primary volume desc */ 65 blkaddr=PVD_OFFSET; 66 if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1) 67 return -1; 68 if(ppr->desctype!=0x01) { 69 if(verb) 70 printf ("** First descriptor is NOT a primary desc on %d:%d **\n", 71 dev_desc->devnum, part_num); 72 return (-1); 73 } 74 if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) { 75 if(verb) 76 printf ("** Wrong ISO Ident: %s on %d:%d **\n", 77 ppr->stand_ident, dev_desc->devnum, part_num); 78 return (-1); 79 } 80 lastsect = le32_to_cpu(ppr->firstsek_LEpathtab1_LE); 81 /* assuming same block size for all entries */ 82 info->blksz = be16_to_cpu(ppr->secsize_BE); 83 PRINTF(" Lastsect:%08lx\n",lastsect); 84 for(i=blkaddr;i<lastsect;i++) { 85 PRINTF("Reading block %d\n", i); 86 if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1) 87 return -1; 88 if(ppr->desctype==0x00) 89 break; /* boot entry found */ 90 if(ppr->desctype==0xff) { 91 if(verb) 92 printf ("** No valid boot catalog found on %d:%d **\n", 93 dev_desc->devnum, part_num); 94 return (-1); 95 } 96 } 97 /* boot entry found */ 98 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { 99 if(verb) 100 printf ("** Wrong El Torito ident: %s on %d:%d **\n", 101 pbr->ident_str, dev_desc->devnum, part_num); 102 return (-1); 103 } 104 bootaddr = get_unaligned_le32(pbr->pointer); 105 PRINTF(" Boot Entry at: %08lX\n",bootaddr); 106 if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) { 107 if(verb) 108 printf ("** Can't read Boot Entry at %lX on %d:%d **\n", 109 bootaddr, dev_desc->devnum, part_num); 110 return (-1); 111 } 112 chksum=0; 113 chksumbuf = (unsigned short *)tmpbuf; 114 for(i=0;i<0x10;i++) 115 chksum += le16_to_cpu(chksumbuf[i]); 116 if(chksum!=0) { 117 if(verb) 118 printf("** Checksum Error in booting catalog validation entry on %d:%d **\n", 119 dev_desc->devnum, part_num); 120 return (-1); 121 } 122 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { 123 if(verb) 124 printf ("** Key 0x55 0xAA error on %d:%d **\n", 125 dev_desc->devnum, part_num); 126 return(-1); 127 } 128 #ifdef CHECK_FOR_POWERPC_PLATTFORM 129 if(pve->platform!=0x01) { 130 if(verb) 131 printf ("** No PowerPC platform CD on %d:%d **\n", 132 dev_desc->devnum, part_num); 133 return(-1); 134 } 135 #endif 136 /* the validation entry seems to be ok, now search the "partition" */ 137 entry_num=1; 138 offset=0x20; 139 strcpy((char *)info->type, "U-Boot"); 140 switch(dev_desc->if_type) { 141 case IF_TYPE_IDE: 142 case IF_TYPE_SATA: 143 case IF_TYPE_ATAPI: 144 sprintf ((char *)info->name, "hd%c%d", 145 'a' + dev_desc->devnum, part_num); 146 break; 147 case IF_TYPE_SCSI: 148 sprintf ((char *)info->name, "sd%c%d", 149 'a' + dev_desc->devnum, part_num); 150 break; 151 case IF_TYPE_USB: 152 sprintf ((char *)info->name, "usbd%c%d", 153 'a' + dev_desc->devnum, part_num); 154 break; 155 case IF_TYPE_DOC: 156 sprintf ((char *)info->name, "docd%c%d", 157 'a' + dev_desc->devnum, part_num); 158 break; 159 default: 160 sprintf ((char *)info->name, "xx%c%d", 161 'a' + dev_desc->devnum, part_num); 162 break; 163 } 164 /* the bootcatalog (including validation Entry) is limited to 2048Bytes 165 * (63 boot entries + validation entry) */ 166 while(offset<2048) { 167 pide=(iso_init_def_entry_t *)&tmpbuf[offset]; 168 if ((pide->boot_ind==0x88) || 169 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */ 170 if(entry_num==part_num) { /* part found */ 171 goto found; 172 } 173 entry_num++; /* count partitions Entries (boot and non bootables */ 174 offset+=0x20; 175 continue; 176 } 177 if ((pide->boot_ind==0x90) || /* Section Header Entry */ 178 (pide->boot_ind==0x91) || /* Section Header Entry (last) */ 179 (pide->boot_ind==0x44)) { /* Extension Indicator */ 180 offset+=0x20; /* skip unused entries */ 181 } 182 else { 183 if(verb) 184 printf ("** Partition %d not found on device %d **\n", 185 part_num, dev_desc->devnum); 186 return(-1); 187 } 188 } 189 /* if we reach this point entire sector has been 190 * searched w/o succsess */ 191 if(verb) 192 printf ("** Partition %d not found on device %d **\n", 193 part_num, dev_desc->devnum); 194 return(-1); 195 found: 196 if(pide->boot_ind!=0x88) { 197 if(verb) 198 printf("** Partition %d is not bootable on device %d **\n", 199 part_num, dev_desc->devnum); 200 return (-1); 201 } 202 switch(pide->boot_media) { 203 case 0x00: /* no emulation */ 204 info->size = get_unaligned_le16(pide->sec_cnt)>>2; 205 break; 206 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */ 207 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */ 208 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */ 209 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */ 210 default: info->size=0; break; 211 } 212 newblkaddr = get_unaligned_le32(pide->rel_block_addr); 213 info->start=newblkaddr; 214 215 if (dev_desc->blksz == 512) { 216 info->size *= 4; 217 info->start *= 4; 218 info->blksz = 512; 219 } 220 221 PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size); 222 return 0; 223 } 224 225 static int part_get_info_iso(struct blk_desc *dev_desc, int part_num, 226 disk_partition_t *info) 227 { 228 return part_get_info_iso_verb(dev_desc, part_num, info, 1); 229 } 230 231 static void part_print_iso(struct blk_desc *dev_desc) 232 { 233 disk_partition_t info; 234 int i; 235 236 if (part_get_info_iso_verb(dev_desc, 0, &info, 0) == -1) { 237 printf("** No boot partition found on device %d **\n", 238 dev_desc->devnum); 239 return; 240 } 241 printf("Part Start Sect x Size Type\n"); 242 i=0; 243 do { 244 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n", 245 i, info.start, info.size, info.blksz, info.type); 246 i++; 247 } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1); 248 } 249 250 static int part_test_iso(struct blk_desc *dev_desc) 251 { 252 disk_partition_t info; 253 254 return part_get_info_iso_verb(dev_desc, 1, &info, 1); 255 } 256 257 U_BOOT_PART_TYPE(iso) = { 258 .name = "ISO", 259 .part_type = PART_TYPE_ISO, 260 .get_info = part_get_info_iso, 261 .print = part_print_iso, 262 .test = part_test_iso, 263 }; 264 #endif 265