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u-boot/disk/part_iso.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

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// 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
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