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

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

#include <common.h>
#include <command.h>
#include <asm/unaligned.h>
#include "part_iso.h"

#ifdef 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
Commit	Line	Data
cc1c8a13 WD	1	/*
	2	* (C) Copyright 2001
	3	* Denis Peter, MPL AG Switzerland, [email protected].
	4	*
3765b3e7	5	* SPDX-License-Identifier: GPL-2.0+
cc1c8a13 WD	6	*/
	7
	8	#include <common.h>
	9	#include <command.h>
0919228c	10	#include <asm/unaligned.h>
cc1c8a13 WD	11	#include "part_iso.h"
cc1c8a13 WD	12
2c1af9dc	13	#ifdef HAVE_BLOCK_DEVICE
cc1c8a13	14
1968e615	15	/* #define ISO_PART_DEBUG */
cc1c8a13 WD	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
5c27535d	27	static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN);
cc1c8a13	28
a2adb173 AG	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
cc1c8a13	48	/* only boot records will be listed as valid partitions */
3e8bd469 SG	49	int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num,
3e8bd469 SG	50	disk_partition_t *info, int verb)
cc1c8a13 WD	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
a2adb173	61	if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512))
d7ea4d4d EE	62	return -1;
d7ea4d4d EE	63
cc1c8a13 WD	64	/* the first sector (sector 0x10) must be a primary volume desc */
cc1c8a13 WD	65	blkaddr=PVD_OFFSET;
a2adb173	66	if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
7c4213f6	67	return -1;
cc1c8a13 WD	68	if(ppr->desctype!=0x01) {
	69	if(verb)
	70	printf (" First descriptor is NOT a primary desc on %d:%d \n",
bcce53d0	71	dev_desc->devnum, part_num);
cc1c8a13 WD	72	return (-1);
cc1c8a13 WD	73	}
77ddac94	74	if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
cc1c8a13 WD	75	if(verb)
cc1c8a13 WD	76	printf (" Wrong ISO Ident: %s on %d:%d \n",
bcce53d0	77	ppr->stand_ident, dev_desc->devnum, part_num);
cc1c8a13 WD	78	return (-1);
cc1c8a13 WD	79	}
ef9e6de5 AG	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);
cc1c8a13 WD	83	PRINTF(" Lastsect:%08lx\n",lastsect);
cc1c8a13 WD	84	for(i=blkaddr;i<lastsect;i++) {
c7de829c	85	PRINTF("Reading block %d\n", i);
a2adb173	86	if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
7c4213f6	87	return -1;
cc1c8a13 WD	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",
bcce53d0	93	dev_desc->devnum, part_num);
cc1c8a13 WD	94	return (-1);
	95	}
	96	}
53677ef1	97	/* boot entry found */
cc1c8a13 WD	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",
bcce53d0	101	pbr->ident_str, dev_desc->devnum, part_num);
cc1c8a13 WD	102	return (-1);
cc1c8a13 WD	103	}
0919228c	104	bootaddr = get_unaligned_le32(pbr->pointer);
cc1c8a13	105	PRINTF(" Boot Entry at: %08lX\n",bootaddr);
a2adb173	106	if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
cc1c8a13 WD	107	if(verb)
cc1c8a13 WD	108	printf (" Can't read Boot Entry at %lX on %d:%d \n",
bcce53d0	109	bootaddr, dev_desc->devnum, part_num);
cc1c8a13 WD	110	return (-1);
	111	}
	112	chksum=0;
	113	chksumbuf = (unsigned short *)tmpbuf;
	114	for(i=0;i<0x10;i++)
ef9e6de5	115	chksum += le16_to_cpu(chksumbuf[i]);
cc1c8a13 WD	116	if(chksum!=0) {
cc1c8a13 WD	117	if(verb)
bcce53d0 SG	118	printf(" Checksum Error in booting catalog validation entry on %d:%d \n",
bcce53d0 SG	119	dev_desc->devnum, part_num);
cc1c8a13 WD	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",
bcce53d0	125	dev_desc->devnum, part_num);
cc1c8a13 WD	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",
bcce53d0	132	dev_desc->devnum, part_num);
cc1c8a13 WD	133	return(-1);
	134	}
	135	#endif
	136	/* the validation entry seems to be ok, now search the "partition" */
2579c674	137	entry_num=1;
cc1c8a13	138	offset=0x20;
192bc694	139	strcpy((char *)info->type, "U-Boot");
da2ee24d	140	part_set_generic_name(dev_desc, part_num, (char *)info->name);
cc1c8a13 WD	141	/* the bootcatalog (including validation Entry) is limited to 2048Bytes
	142	* (63 boot entries + validation entry) */
	143	while(offset<2048) {
	144	pide=(iso_init_def_entry_t *)&tmpbuf[offset];
	145	if ((pide->boot_ind==0x88) \|\|
	146	(pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
	147	if(entry_num==part_num) { /* part found */
	148	goto found;
	149	}
	150	entry_num++; /* count partitions Entries (boot and non bootables */
	151	offset+=0x20;
	152	continue;
	153	}
	154	if ((pide->boot_ind==0x90) \|\| /* Section Header Entry */
	155	(pide->boot_ind==0x91) \|\| /* Section Header Entry (last) */
	156	(pide->boot_ind==0x44)) { /* Extension Indicator */
	157	offset+=0x20; /* skip unused entries */
	158	}
	159	else {
	160	if(verb)
	161	printf (" Partition %d not found on device %d \n",
bcce53d0	162	part_num, dev_desc->devnum);
cc1c8a13 WD	163	return(-1);
	164	}
	165	}
	166	/* if we reach this point entire sector has been
	167	* searched w/o succsess */
	168	if(verb)
	169	printf (" Partition %d not found on device %d \n",
bcce53d0	170	part_num, dev_desc->devnum);
cc1c8a13 WD	171	return(-1);
	172	found:
	173	if(pide->boot_ind!=0x88) {
	174	if(verb)
bcce53d0 SG	175	printf(" Partition %d is not bootable on device %d \n",
bcce53d0 SG	176	part_num, dev_desc->devnum);
cc1c8a13 WD	177	return (-1);
	178	}
	179	switch(pide->boot_media) {
	180	case 0x00: /* no emulation */
0919228c	181	info->size = get_unaligned_le16(pide->sec_cnt)>>2;
cc1c8a13 WD	182	break;
	183	case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
	184	case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
	185	case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
	186	case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
	187	default: info->size=0; break;
	188	}
0919228c	189	newblkaddr = get_unaligned_le32(pide->rel_block_addr);
cc1c8a13	190	info->start=newblkaddr;
a2adb173 AG	191
	192	if (dev_desc->blksz == 512) {
	193	info->size *= 4;
	194	info->start *= 4;
	195	info->blksz = 512;
	196	}
	197
	198	PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size);
cc1c8a13 WD	199	return 0;
	200	}
	201
3e8bd469	202	static int part_get_info_iso(struct blk_desc *dev_desc, int part_num,
96e5b03c	203	disk_partition_t *info)
cc1c8a13	204	{
b16339e2	205	return part_get_info_iso_verb(dev_desc, part_num, info, 0);
cc1c8a13 WD	206	}
cc1c8a13 WD	207
084bf4c2	208	static void part_print_iso(struct blk_desc *dev_desc)
cc1c8a13 WD	209	{
	210	disk_partition_t info;
	211	int i;
3e8bd469	212
28f0014b	213	if (part_get_info_iso_verb(dev_desc, 1, &info, 0) == -1) {
bcce53d0 SG	214	printf(" No boot partition found on device %d \n",
bcce53d0 SG	215	dev_desc->devnum);
cc1c8a13 WD	216	return;
	217	}
	218	printf("Part Start Sect x Size Type\n");
28f0014b	219	i=1;
cc1c8a13	220	do {
04735e9c FL	221	printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
04735e9c FL	222	i, info.start, info.size, info.blksz, info.type);
cc1c8a13	223	i++;
3e8bd469	224	} while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1);
cc1c8a13 WD	225	}
cc1c8a13 WD	226
084bf4c2	227	static int part_test_iso(struct blk_desc *dev_desc)
cc1c8a13 WD	228	{
	229	disk_partition_t info;
	230
b16339e2	231	return part_get_info_iso_verb(dev_desc, 1, &info, 0);
cc1c8a13 WD	232	}
cc1c8a13 WD	233
96e5b03c SG	234	U_BOOT_PART_TYPE(iso) = {
	235	.name = "ISO",
	236	.part_type = PART_TYPE_ISO,
87b8530f	237	.max_entries = ISO_ENTRY_NUMBERS,
3e8bd469	238	.get_info = part_get_info_iso,
084bf4c2 SG	239	.print = part_print_iso,
084bf4c2 SG	240	.test = part_test_iso,
96e5b03c	241	};
cde5c64d	242	#endif