[J-u-boot.git] / disk / part_iso.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2001
 * Denis Peter, MPL AG Switzerland, [email protected].
 */

#include <common.h>
#include <blk.h>
#include <command.h>
#include <part.h>
#include <asm/cache.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,
			   struct disk_partition *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,
			     struct disk_partition *info)
{
	return part_get_info_iso_verb(dev_desc, part_num, info, 0);
}

static void part_print_iso(struct blk_desc *dev_desc)
{
	struct disk_partition 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)
{
	struct disk_partition 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
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
cc1c8a13 WD	2	/*
	3	* (C) Copyright 2001
	4	* Denis Peter, MPL AG Switzerland, [email protected].
cc1c8a13 WD	5	*/
	6
	7	#include <common.h>
e6f6f9e6	8	#include <blk.h>
cc1c8a13	9	#include <command.h>
e6f6f9e6	10	#include <part.h>
90526e9f	11	#include <asm/cache.h>
0919228c	12	#include <asm/unaligned.h>
cc1c8a13 WD	13	#include "part_iso.h"
cc1c8a13 WD	14
1811a928	15	#ifdef CONFIG_HAVE_BLOCK_DEVICE
cc1c8a13	16
1968e615	17	/* #define ISO_PART_DEBUG */
cc1c8a13 WD	18
	19	#ifdef ISO_PART_DEBUG
	20	#define PRINTF(fmt,args...) printf (fmt ,##args)
	21	#else
	22	#define PRINTF(fmt,args...)
	23	#endif
	24
	25	/* enable this if CDs are written with the PowerPC Platform ID */
	26	#undef CHECK_FOR_POWERPC_PLATTFORM
	27	#define CD_SECTSIZE 2048
	28
5c27535d	29	static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN);
cc1c8a13	30
a2adb173 AG	31	unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start,
	32	lbaint_t blkcnt, void *buffer)
	33	{
	34	unsigned long ret;
	35
	36	if (block_dev->blksz == 512) {
	37	/* Convert from 2048 to 512 sector size */
	38	start *= 4;
	39	blkcnt *= 4;
	40	}
	41
	42	ret = blk_dread(block_dev, start, blkcnt, buffer);
	43
	44	if (block_dev->blksz == 512)
	45	ret /= 4;
	46
	47	return ret;
	48	}
	49
cc1c8a13	50	/* only boot records will be listed as valid partitions */
3e8bd469	51	int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num,
0528979f	52	struct disk_partition *info, int verb)
cc1c8a13 WD	53	{
	54	int i,offset,entry_num;
	55	unsigned short *chksumbuf;
	56	unsigned short chksum;
	57	unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
	58	iso_boot_rec_t pbr = (iso_boot_rec_t )tmpbuf; /* boot record */
	59	iso_pri_rec_t ppr = (iso_pri_rec_t )tmpbuf; /* primary desc */
	60	iso_val_entry_t pve = (iso_val_entry_t )tmpbuf;
	61	iso_init_def_entry_t *pide;
	62
a2adb173	63	if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512))
d7ea4d4d EE	64	return -1;
d7ea4d4d EE	65
cc1c8a13 WD	66	/* the first sector (sector 0x10) must be a primary volume desc */
cc1c8a13 WD	67	blkaddr=PVD_OFFSET;
a2adb173	68	if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
7c4213f6	69	return -1;
cc1c8a13 WD	70	if(ppr->desctype!=0x01) {
	71	if(verb)
	72	printf (" First descriptor is NOT a primary desc on %d:%d \n",
bcce53d0	73	dev_desc->devnum, part_num);
cc1c8a13 WD	74	return (-1);
cc1c8a13 WD	75	}
77ddac94	76	if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
cc1c8a13 WD	77	if(verb)
cc1c8a13 WD	78	printf (" Wrong ISO Ident: %s on %d:%d \n",
bcce53d0	79	ppr->stand_ident, dev_desc->devnum, part_num);
cc1c8a13 WD	80	return (-1);
cc1c8a13 WD	81	}
ef9e6de5 AG	82	lastsect = le32_to_cpu(ppr->firstsek_LEpathtab1_LE);
	83	/* assuming same block size for all entries */
	84	info->blksz = be16_to_cpu(ppr->secsize_BE);
cc1c8a13 WD	85	PRINTF(" Lastsect:%08lx\n",lastsect);
cc1c8a13 WD	86	for(i=blkaddr;i<lastsect;i++) {
c7de829c	87	PRINTF("Reading block %d\n", i);
a2adb173	88	if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
7c4213f6	89	return -1;
cc1c8a13 WD	90	if(ppr->desctype==0x00)
	91	break; /* boot entry found */
	92	if(ppr->desctype==0xff) {
	93	if(verb)
	94	printf (" No valid boot catalog found on %d:%d \n",
bcce53d0	95	dev_desc->devnum, part_num);
cc1c8a13 WD	96	return (-1);
	97	}
	98	}
53677ef1	99	/* boot entry found */
cc1c8a13 WD	100	if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
	101	if(verb)
	102	printf (" Wrong El Torito ident: %s on %d:%d \n",
bcce53d0	103	pbr->ident_str, dev_desc->devnum, part_num);
cc1c8a13 WD	104	return (-1);
cc1c8a13 WD	105	}
0919228c	106	bootaddr = get_unaligned_le32(pbr->pointer);
cc1c8a13	107	PRINTF(" Boot Entry at: %08lX\n",bootaddr);
a2adb173	108	if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
cc1c8a13 WD	109	if(verb)
cc1c8a13 WD	110	printf (" Can't read Boot Entry at %lX on %d:%d \n",
bcce53d0	111	bootaddr, dev_desc->devnum, part_num);
cc1c8a13 WD	112	return (-1);
	113	}
	114	chksum=0;
	115	chksumbuf = (unsigned short *)tmpbuf;
	116	for(i=0;i<0x10;i++)
ef9e6de5	117	chksum += le16_to_cpu(chksumbuf[i]);
cc1c8a13 WD	118	if(chksum!=0) {
cc1c8a13 WD	119	if(verb)
bcce53d0 SG	120	printf(" Checksum Error in booting catalog validation entry on %d:%d \n",
bcce53d0 SG	121	dev_desc->devnum, part_num);
cc1c8a13 WD	122	return (-1);
	123	}
	124	if((pve->key[0]!=0x55)\|\|(pve->key[1]!=0xAA)) {
	125	if(verb)
	126	printf (" Key 0x55 0xAA error on %d:%d \n",
bcce53d0	127	dev_desc->devnum, part_num);
cc1c8a13 WD	128	return(-1);
	129	}
	130	#ifdef CHECK_FOR_POWERPC_PLATTFORM
	131	if(pve->platform!=0x01) {
	132	if(verb)
	133	printf (" No PowerPC platform CD on %d:%d \n",
bcce53d0	134	dev_desc->devnum, part_num);
cc1c8a13 WD	135	return(-1);
	136	}
	137	#endif
	138	/* the validation entry seems to be ok, now search the "partition" */
2579c674	139	entry_num=1;
cc1c8a13	140	offset=0x20;
192bc694	141	strcpy((char *)info->type, "U-Boot");
da2ee24d	142	part_set_generic_name(dev_desc, part_num, (char *)info->name);
cc1c8a13 WD	143	/* the bootcatalog (including validation Entry) is limited to 2048Bytes
	144	* (63 boot entries + validation entry) */
	145	while(offset<2048) {
	146	pide=(iso_init_def_entry_t *)&tmpbuf[offset];
	147	if ((pide->boot_ind==0x88) \|\|
	148	(pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
	149	if(entry_num==part_num) { /* part found */
	150	goto found;
	151	}
	152	entry_num++; /* count partitions Entries (boot and non bootables */
	153	offset+=0x20;
	154	continue;
	155	}
	156	if ((pide->boot_ind==0x90) \|\| /* Section Header Entry */
	157	(pide->boot_ind==0x91) \|\| /* Section Header Entry (last) */
	158	(pide->boot_ind==0x44)) { /* Extension Indicator */
	159	offset+=0x20; /* skip unused entries */
	160	}
	161	else {
	162	if(verb)
	163	printf (" Partition %d not found on device %d \n",
bcce53d0	164	part_num, dev_desc->devnum);
cc1c8a13 WD	165	return(-1);
	166	}
	167	}
	168	/* if we reach this point entire sector has been
	169	* searched w/o succsess */
	170	if(verb)
	171	printf (" Partition %d not found on device %d \n",
bcce53d0	172	part_num, dev_desc->devnum);
cc1c8a13 WD	173	return(-1);
	174	found:
	175	if(pide->boot_ind!=0x88) {
	176	if(verb)
bcce53d0 SG	177	printf(" Partition %d is not bootable on device %d \n",
bcce53d0 SG	178	part_num, dev_desc->devnum);
cc1c8a13 WD	179	return (-1);
	180	}
	181	switch(pide->boot_media) {
	182	case 0x00: /* no emulation */
0919228c	183	info->size = get_unaligned_le16(pide->sec_cnt)>>2;
cc1c8a13 WD	184	break;
	185	case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
	186	case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
	187	case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
	188	case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
	189	default: info->size=0; break;
	190	}
0919228c	191	newblkaddr = get_unaligned_le32(pide->rel_block_addr);
cc1c8a13	192	info->start=newblkaddr;
a2adb173 AG	193
	194	if (dev_desc->blksz == 512) {
	195	info->size *= 4;
	196	info->start *= 4;
	197	info->blksz = 512;
	198	}
	199
	200	PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size);
cc1c8a13 WD	201	return 0;
	202	}
	203
3e8bd469	204	static int part_get_info_iso(struct blk_desc *dev_desc, int part_num,
0528979f	205	struct disk_partition *info)
cc1c8a13	206	{
b16339e2	207	return part_get_info_iso_verb(dev_desc, part_num, info, 0);
cc1c8a13 WD	208	}
cc1c8a13 WD	209
084bf4c2	210	static void part_print_iso(struct blk_desc *dev_desc)
cc1c8a13	211	{
0528979f	212	struct disk_partition info;
cc1c8a13	213	int i;
3e8bd469	214
28f0014b	215	if (part_get_info_iso_verb(dev_desc, 1, &info, 0) == -1) {
bcce53d0 SG	216	printf(" No boot partition found on device %d \n",
bcce53d0 SG	217	dev_desc->devnum);
cc1c8a13 WD	218	return;
	219	}
	220	printf("Part Start Sect x Size Type\n");
28f0014b	221	i=1;
cc1c8a13	222	do {
04735e9c FL	223	printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
04735e9c FL	224	i, info.start, info.size, info.blksz, info.type);
cc1c8a13	225	i++;
3e8bd469	226	} while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1);
cc1c8a13 WD	227	}
cc1c8a13 WD	228
084bf4c2	229	static int part_test_iso(struct blk_desc *dev_desc)
cc1c8a13	230	{
0528979f	231	struct disk_partition info;
cc1c8a13	232
b16339e2	233	return part_get_info_iso_verb(dev_desc, 1, &info, 0);
cc1c8a13 WD	234	}
cc1c8a13 WD	235
96e5b03c SG	236	U_BOOT_PART_TYPE(iso) = {
	237	.name = "ISO",
	238	.part_type = PART_TYPE_ISO,
87b8530f	239	.max_entries = ISO_ENTRY_NUMBERS,
3e8bd469	240	.get_info = part_get_info_iso,
084bf4c2 SG	241	.print = part_print_iso,
084bf4c2 SG	242	.test = part_test_iso,
96e5b03c	243	};
cde5c64d	244	#endif