xref: /openbmc/u-boot/disk/part_iso.c (revision 5794619e)
1 /*
2  * (C) Copyright 2001
3  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23 
24 #include <common.h>
25 #include <command.h>
26 #include "part_iso.h"
27 
28 #if defined(CONFIG_CMD_IDE) || \
29     defined(CONFIG_CMD_MG_DISK) || \
30     defined(CONFIG_CMD_SCSI) || \
31     defined(CONFIG_CMD_SATA) || \
32     defined(CONFIG_CMD_USB) || \
33     defined(CONFIG_MMC) || \
34     defined(CONFIG_SYSTEMACE)
35 
36 /* #define	ISO_PART_DEBUG */
37 
38 #ifdef	ISO_PART_DEBUG
39 #define	PRINTF(fmt,args...)	printf (fmt ,##args)
40 #else
41 #define PRINTF(fmt,args...)
42 #endif
43 
44 /* enable this if CDs are written with the PowerPC Platform ID */
45 #undef CHECK_FOR_POWERPC_PLATTFORM
46 #define CD_SECTSIZE 2048
47 
48 static unsigned char tmpbuf[CD_SECTSIZE];
49 
50 /* Convert char[4] in little endian format to the host format integer
51  */
52 static inline unsigned long le32_to_int(unsigned char *le32)
53 {
54     return ((le32[3] << 24) +
55 	    (le32[2] << 16) +
56 	    (le32[1] << 8) +
57 	     le32[0]
58 	   );
59 }
60 /* Convert char[2] in little endian format to the host format integer
61  */
62 static inline unsigned short le16_to_int(unsigned char *le16)
63 {
64     return ((le16[1] << 8) +
65 	   le16[0]
66 	   );
67 }
68 
69 
70 /* only boot records will be listed as valid partitions */
71 int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
72 {
73 	int i,offset,entry_num;
74 	unsigned short *chksumbuf;
75 	unsigned short chksum;
76 	unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
77 	iso_boot_rec_t *pbr = (iso_boot_rec_t	*)tmpbuf; /* boot record */
78 	iso_pri_rec_t *ppr = (iso_pri_rec_t	*)tmpbuf;	/* primary desc */
79 	iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
80 	iso_init_def_entry_t *pide;
81 
82 	/* the first sector (sector 0x10) must be a primary volume desc */
83 	blkaddr=PVD_OFFSET;
84 	if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1)
85 	return (-1);
86 	if(ppr->desctype!=0x01) {
87 		if(verb)
88 			printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
89 				dev_desc->dev, part_num);
90 		return (-1);
91 	}
92 	if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
93 		if(verb)
94 			printf ("** Wrong ISO Ident: %s on %d:%d **\n",
95 				ppr->stand_ident,dev_desc->dev, part_num);
96 		return (-1);
97 	}
98 	lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
99 		  ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
100 		  ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
101 		  ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
102 	info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
103 	PRINTF(" Lastsect:%08lx\n",lastsect);
104 	for(i=blkaddr;i<lastsect;i++) {
105 		PRINTF("Reading block %d\n", i);
106 		if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1)
107 		return (-1);
108 		if(ppr->desctype==0x00)
109 			break; /* boot entry found */
110 		if(ppr->desctype==0xff) {
111 			if(verb)
112 				printf ("** No valid boot catalog found on %d:%d **\n",
113 					dev_desc->dev, part_num);
114 			return (-1);
115 		}
116 	}
117 	/* boot entry found */
118 	if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
119 		if(verb)
120 			printf ("** Wrong El Torito ident: %s on %d:%d **\n",
121 				pbr->ident_str,dev_desc->dev, part_num);
122 		return (-1);
123 	}
124 	bootaddr=le32_to_int(pbr->pointer);
125 	PRINTF(" Boot Entry at: %08lX\n",bootaddr);
126 	if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) {
127 		if(verb)
128 			printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
129 				bootaddr,dev_desc->dev, part_num);
130 		return (-1);
131 	}
132 	chksum=0;
133 	chksumbuf = (unsigned short *)tmpbuf;
134 	for(i=0;i<0x10;i++)
135 		chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
136 	if(chksum!=0) {
137 		if(verb)
138 			printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
139 				dev_desc->dev, part_num);
140 		return (-1);
141 	}
142 	if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
143 		if(verb)
144 			printf ("** Key 0x55 0xAA error on %d:%d **\n",
145 				dev_desc->dev, part_num);
146 		return(-1);
147 	}
148 #ifdef CHECK_FOR_POWERPC_PLATTFORM
149 	if(pve->platform!=0x01) {
150 		if(verb)
151 			printf ("** No PowerPC platform CD on %d:%d **\n",
152 				dev_desc->dev, part_num);
153 		return(-1);
154 	}
155 #endif
156 	/* the validation entry seems to be ok, now search the "partition" */
157 	entry_num=0;
158 	offset=0x20;
159 	sprintf ((char *)info->type, "U-Boot");
160 	switch(dev_desc->if_type) {
161 		case IF_TYPE_IDE:
162 		case IF_TYPE_SATA:
163 		case IF_TYPE_ATAPI:
164 			sprintf ((char *)info->name, "hd%c%d",
165 				'a' + dev_desc->dev, part_num);
166 			break;
167 		case IF_TYPE_SCSI:
168 			sprintf ((char *)info->name, "sd%c%d",
169 				'a' + dev_desc->dev, part_num);
170 			break;
171 		case IF_TYPE_USB:
172 			sprintf ((char *)info->name, "usbd%c%d",
173 				'a' + dev_desc->dev, part_num);
174 			break;
175 		case IF_TYPE_DOC:
176 			sprintf ((char *)info->name, "docd%c%d",
177 				'a' + dev_desc->dev, part_num);
178 			break;
179 		default:
180 			sprintf ((char *)info->name, "xx%c%d",
181 				'a' + dev_desc->dev, part_num);
182 			break;
183 	}
184 	/* the bootcatalog (including validation Entry) is limited to 2048Bytes
185 	 * (63 boot entries + validation entry) */
186 	 while(offset<2048) {
187 		pide=(iso_init_def_entry_t *)&tmpbuf[offset];
188 		if ((pide->boot_ind==0x88) ||
189 		    (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
190 			if(entry_num==part_num) { /* part found */
191 				goto found;
192 			}
193 			entry_num++; /* count partitions Entries (boot and non bootables */
194 			offset+=0x20;
195 			continue;
196 		}
197 		if ((pide->boot_ind==0x90) ||	/* Section Header Entry */
198 		    (pide->boot_ind==0x91) ||	/* Section Header Entry (last) */
199 		    (pide->boot_ind==0x44)) {	/* Extension Indicator */
200 			offset+=0x20; /* skip unused entries */
201 		}
202 		else {
203 			if(verb)
204 				printf ("** Partition %d not found on device %d **\n",
205 					part_num,dev_desc->dev);
206 			return(-1);
207 		}
208 	}
209 	/* if we reach this point entire sector has been
210 	 * searched w/o succsess */
211 	if(verb)
212 		printf ("** Partition %d not found on device %d **\n",
213 			part_num,dev_desc->dev);
214 	return(-1);
215 found:
216 	if(pide->boot_ind!=0x88) {
217 		if(verb)
218 			printf ("** Partition %d is not bootable on device %d **\n",
219 				part_num,dev_desc->dev);
220 		return (-1);
221 	}
222 	switch(pide->boot_media) {
223 		case 0x00: /* no emulation */
224 			info->size=le16_to_int(pide->sec_cnt)>>2;
225 			break;
226 		case 0x01:	info->size=2400>>2; break; /* 1.2MByte Floppy */
227 		case 0x02:	info->size=2880>>2; break; /* 1.44MByte Floppy */
228 		case 0x03:	info->size=5760>>2; break; /* 2.88MByte Floppy */
229 		case 0x04:	info->size=2880>>2; break; /* dummy (HD Emulation) */
230 		default:	info->size=0; break;
231 	}
232 	newblkaddr=le32_to_int(pide->rel_block_addr);
233 	info->start=newblkaddr;
234 	PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
235 	return 0;
236 }
237 
238 int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
239 {
240 	return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
241 }
242 
243 
244 void print_part_iso(block_dev_desc_t * dev_desc)
245 {
246 	disk_partition_t info;
247 	int i;
248 	if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
249 		printf("** No boot partition found on device %d **\n",dev_desc->dev);
250 		return;
251 	}
252 	printf("Part   Start     Sect x Size Type\n");
253 	i=0;
254 	do {
255 		printf (" %2d %8ld %8ld %6ld %.32s\n",
256 			i, info.start, info.size, info.blksz, info.type);
257 		i++;
258 	} while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
259 }
260 
261 int test_part_iso (block_dev_desc_t *dev_desc)
262 {
263 	disk_partition_t info;
264 
265 	return(get_partition_info_iso_verb(dev_desc,0,&info,0));
266 }
267 
268 #endif
269