| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2001 |
| * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch. |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| #include <asm/unaligned.h> |
| #include "part_iso.h" |
| |
| #ifdef CONFIG_HAVE_BLOCK_DEVICE |
| |
| /* #define ISO_PART_DEBUG */ |
| |
| #ifdef ISO_PART_DEBUG |
| #define PRINTF(fmt,args...) printf (fmt ,##args) |
| #else |
| #define PRINTF(fmt,args...) |
| #endif |
| |
| /* enable this if CDs are written with the PowerPC Platform ID */ |
| #undef CHECK_FOR_POWERPC_PLATTFORM |
| #define CD_SECTSIZE 2048 |
| |
| static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN); |
| |
| unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start, |
| lbaint_t blkcnt, void *buffer) |
| { |
| unsigned long ret; |
| |
| if (block_dev->blksz == 512) { |
| /* Convert from 2048 to 512 sector size */ |
| start *= 4; |
| blkcnt *= 4; |
| } |
| |
| ret = blk_dread(block_dev, start, blkcnt, buffer); |
| |
| if (block_dev->blksz == 512) |
| ret /= 4; |
| |
| return ret; |
| } |
| |
| /* only boot records will be listed as valid partitions */ |
| int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num, |
| disk_partition_t *info, int verb) |
| { |
| int i,offset,entry_num; |
| unsigned short *chksumbuf; |
| unsigned short chksum; |
| unsigned long newblkaddr,blkaddr,lastsect,bootaddr; |
| iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */ |
| iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */ |
| iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf; |
| iso_init_def_entry_t *pide; |
| |
| if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512)) |
| return -1; |
| |
| /* the first sector (sector 0x10) must be a primary volume desc */ |
| blkaddr=PVD_OFFSET; |
| if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1) |
| return -1; |
| if(ppr->desctype!=0x01) { |
| if(verb) |
| printf ("** First descriptor is NOT a primary desc on %d:%d **\n", |
| dev_desc->devnum, part_num); |
| return (-1); |
| } |
| if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) { |
| if(verb) |
| printf ("** Wrong ISO Ident: %s on %d:%d **\n", |
| ppr->stand_ident, dev_desc->devnum, part_num); |
| return (-1); |
| } |
| lastsect = le32_to_cpu(ppr->firstsek_LEpathtab1_LE); |
| /* assuming same block size for all entries */ |
| info->blksz = be16_to_cpu(ppr->secsize_BE); |
| PRINTF(" Lastsect:%08lx\n",lastsect); |
| for(i=blkaddr;i<lastsect;i++) { |
| PRINTF("Reading block %d\n", i); |
| if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1) |
| return -1; |
| if(ppr->desctype==0x00) |
| break; /* boot entry found */ |
| if(ppr->desctype==0xff) { |
| if(verb) |
| printf ("** No valid boot catalog found on %d:%d **\n", |
| dev_desc->devnum, part_num); |
| return (-1); |
| } |
| } |
| /* boot entry found */ |
| if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { |
| if(verb) |
| printf ("** Wrong El Torito ident: %s on %d:%d **\n", |
| pbr->ident_str, dev_desc->devnum, part_num); |
| return (-1); |
| } |
| bootaddr = get_unaligned_le32(pbr->pointer); |
| PRINTF(" Boot Entry at: %08lX\n",bootaddr); |
| if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) { |
| if(verb) |
| printf ("** Can't read Boot Entry at %lX on %d:%d **\n", |
| bootaddr, dev_desc->devnum, part_num); |
| return (-1); |
| } |
| chksum=0; |
| chksumbuf = (unsigned short *)tmpbuf; |
| for(i=0;i<0x10;i++) |
| chksum += le16_to_cpu(chksumbuf[i]); |
| if(chksum!=0) { |
| if(verb) |
| printf("** Checksum Error in booting catalog validation entry on %d:%d **\n", |
| dev_desc->devnum, part_num); |
| return (-1); |
| } |
| if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { |
| if(verb) |
| printf ("** Key 0x55 0xAA error on %d:%d **\n", |
| dev_desc->devnum, part_num); |
| return(-1); |
| } |
| #ifdef CHECK_FOR_POWERPC_PLATTFORM |
| if(pve->platform!=0x01) { |
| if(verb) |
| printf ("** No PowerPC platform CD on %d:%d **\n", |
| dev_desc->devnum, part_num); |
| return(-1); |
| } |
| #endif |
| /* the validation entry seems to be ok, now search the "partition" */ |
| entry_num=1; |
| offset=0x20; |
| strcpy((char *)info->type, "U-Boot"); |
| part_set_generic_name(dev_desc, part_num, (char *)info->name); |
| /* the bootcatalog (including validation Entry) is limited to 2048Bytes |
| * (63 boot entries + validation entry) */ |
| while(offset<2048) { |
| pide=(iso_init_def_entry_t *)&tmpbuf[offset]; |
| if ((pide->boot_ind==0x88) || |
| (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */ |
| if(entry_num==part_num) { /* part found */ |
| goto found; |
| } |
| entry_num++; /* count partitions Entries (boot and non bootables */ |
| offset+=0x20; |
| continue; |
| } |
| if ((pide->boot_ind==0x90) || /* Section Header Entry */ |
| (pide->boot_ind==0x91) || /* Section Header Entry (last) */ |
| (pide->boot_ind==0x44)) { /* Extension Indicator */ |
| offset+=0x20; /* skip unused entries */ |
| } |
| else { |
| if(verb) |
| printf ("** Partition %d not found on device %d **\n", |
| part_num, dev_desc->devnum); |
| return(-1); |
| } |
| } |
| /* if we reach this point entire sector has been |
| * searched w/o succsess */ |
| if(verb) |
| printf ("** Partition %d not found on device %d **\n", |
| part_num, dev_desc->devnum); |
| return(-1); |
| found: |
| if(pide->boot_ind!=0x88) { |
| if(verb) |
| printf("** Partition %d is not bootable on device %d **\n", |
| part_num, dev_desc->devnum); |
| return (-1); |
| } |
| switch(pide->boot_media) { |
| case 0x00: /* no emulation */ |
| info->size = get_unaligned_le16(pide->sec_cnt)>>2; |
| break; |
| case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */ |
| case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */ |
| case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */ |
| case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */ |
| default: info->size=0; break; |
| } |
| newblkaddr = get_unaligned_le32(pide->rel_block_addr); |
| info->start=newblkaddr; |
| |
| if (dev_desc->blksz == 512) { |
| info->size *= 4; |
| info->start *= 4; |
| info->blksz = 512; |
| } |
| |
| PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size); |
| return 0; |
| } |
| |
| static int part_get_info_iso(struct blk_desc *dev_desc, int part_num, |
| disk_partition_t *info) |
| { |
| return part_get_info_iso_verb(dev_desc, part_num, info, 0); |
| } |
| |
| static void part_print_iso(struct blk_desc *dev_desc) |
| { |
| disk_partition_t info; |
| int i; |
| |
| if (part_get_info_iso_verb(dev_desc, 1, &info, 0) == -1) { |
| printf("** No boot partition found on device %d **\n", |
| dev_desc->devnum); |
| return; |
| } |
| printf("Part Start Sect x Size Type\n"); |
| i=1; |
| do { |
| printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n", |
| i, info.start, info.size, info.blksz, info.type); |
| i++; |
| } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1); |
| } |
| |
| static int part_test_iso(struct blk_desc *dev_desc) |
| { |
| disk_partition_t info; |
| |
| return part_get_info_iso_verb(dev_desc, 1, &info, 0); |
| } |
| |
| U_BOOT_PART_TYPE(iso) = { |
| .name = "ISO", |
| .part_type = PART_TYPE_ISO, |
| .max_entries = ISO_ENTRY_NUMBERS, |
| .get_info = part_get_info_iso, |
| .print = part_print_iso, |
| .test = part_test_iso, |
| }; |
| #endif |
