Merge branch 'master' of git://www.denx.de/git/u-boot-mpc85xx
[platform/kernel/u-boot.git] / disk / part_iso.c
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_SCSI) || \
30      defined(CONFIG_CMD_SATA) || \
31      defined(CONFIG_CMD_USB) || \
32      defined(CONFIG_MMC) || \
33      defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_ISO_PARTITION)
34
35 /* #define      ISO_PART_DEBUG */
36
37 #ifdef  ISO_PART_DEBUG
38 #define PRINTF(fmt,args...)     printf (fmt ,##args)
39 #else
40 #define PRINTF(fmt,args...)
41 #endif
42
43 /* enable this if CDs are written with the PowerPC Platform ID */
44 #undef CHECK_FOR_POWERPC_PLATTFORM
45 #define CD_SECTSIZE 2048
46
47 static unsigned char tmpbuf[CD_SECTSIZE];
48
49 /* Convert char[4] in little endian format to the host format integer
50  */
51 static inline unsigned long le32_to_int(unsigned char *le32)
52 {
53     return ((le32[3] << 24) +
54             (le32[2] << 16) +
55             (le32[1] << 8) +
56              le32[0]
57            );
58 }
59 /* Convert char[2] in little endian format to the host format integer
60  */
61 static inline unsigned short le16_to_int(unsigned char *le16)
62 {
63     return ((le16[1] << 8) +
64            le16[0]
65            );
66 }
67
68
69 /* only boot records will be listed as valid partitions */
70 int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
71 {
72         int i,offset,entry_num;
73         unsigned short *chksumbuf;
74         unsigned short chksum;
75         unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
76         iso_boot_rec_t *pbr = (iso_boot_rec_t   *)tmpbuf; /* boot record */
77         iso_pri_rec_t *ppr = (iso_pri_rec_t     *)tmpbuf;       /* primary desc */
78         iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
79         iso_init_def_entry_t *pide;
80
81         /* the first sector (sector 0x10) must be a primary volume desc */
82         blkaddr=PVD_OFFSET;
83         if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1)
84         return (-1);
85         if(ppr->desctype!=0x01) {
86                 if(verb)
87                         printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
88                                 dev_desc->dev, part_num);
89                 return (-1);
90         }
91         if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
92                 if(verb)
93                         printf ("** Wrong ISO Ident: %s on %d:%d **\n",
94                                 ppr->stand_ident,dev_desc->dev, part_num);
95                 return (-1);
96         }
97         lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
98                   ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
99                   ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
100                   ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
101         info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
102         PRINTF(" Lastsect:%08lx\n",lastsect);
103         for(i=blkaddr;i<lastsect;i++) {
104                 PRINTF("Reading block %d\n", i);
105                 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1)
106                 return (-1);
107                 if(ppr->desctype==0x00)
108                         break; /* boot entry found */
109                 if(ppr->desctype==0xff) {
110                         if(verb)
111                                 printf ("** No valid boot catalog found on %d:%d **\n",
112                                         dev_desc->dev, part_num);
113                         return (-1);
114                 }
115         }
116         /* boot entry found */
117         if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
118                 if(verb)
119                         printf ("** Wrong El Torito ident: %s on %d:%d **\n",
120                                 pbr->ident_str,dev_desc->dev, part_num);
121                 return (-1);
122         }
123         bootaddr=le32_to_int(pbr->pointer);
124         PRINTF(" Boot Entry at: %08lX\n",bootaddr);
125         if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) {
126                 if(verb)
127                         printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
128                                 bootaddr,dev_desc->dev, part_num);
129                 return (-1);
130         }
131         chksum=0;
132         chksumbuf = (unsigned short *)tmpbuf;
133         for(i=0;i<0x10;i++)
134                 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
135         if(chksum!=0) {
136                 if(verb)
137                         printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
138                                 dev_desc->dev, part_num);
139                 return (-1);
140         }
141         if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
142                 if(verb)
143                         printf ("** Key 0x55 0xAA error on %d:%d **\n",
144                                 dev_desc->dev, part_num);
145                 return(-1);
146         }
147 #ifdef CHECK_FOR_POWERPC_PLATTFORM
148         if(pve->platform!=0x01) {
149                 if(verb)
150                         printf ("** No PowerPC platform CD on %d:%d **\n",
151                                 dev_desc->dev, part_num);
152                 return(-1);
153         }
154 #endif
155         /* the validation entry seems to be ok, now search the "partition" */
156         entry_num=0;
157         offset=0x20;
158         sprintf ((char *)info->type, "U-Boot");
159         switch(dev_desc->if_type) {
160                 case IF_TYPE_IDE:
161                 case IF_TYPE_SATA:
162                 case IF_TYPE_ATAPI:
163                         sprintf ((char *)info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num);
164                         break;
165                 case IF_TYPE_SCSI:
166                         sprintf ((char *)info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num);
167                         break;
168                 case IF_TYPE_USB:
169                         sprintf ((char *)info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num);
170                         break;
171                 case IF_TYPE_DOC:
172                         sprintf ((char *)info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num);
173                         break;
174                 default:
175                         sprintf ((char *)info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num);
176                         break;
177         }
178         /* the bootcatalog (including validation Entry) is limited to 2048Bytes
179          * (63 boot entries + validation entry) */
180          while(offset<2048) {
181                 pide=(iso_init_def_entry_t *)&tmpbuf[offset];
182                 if ((pide->boot_ind==0x88) ||
183                     (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
184                         if(entry_num==part_num) { /* part found */
185                                 goto found;
186                         }
187                         entry_num++; /* count partitions Entries (boot and non bootables */
188                         offset+=0x20;
189                         continue;
190                 }
191                 if ((pide->boot_ind==0x90) ||   /* Section Header Entry */
192                     (pide->boot_ind==0x91) ||   /* Section Header Entry (last) */
193                     (pide->boot_ind==0x44)) {   /* Extension Indicator */
194                         offset+=0x20; /* skip unused entries */
195                 }
196                 else {
197                         if(verb)
198                                 printf ("** Partition %d not found on device %d **\n",
199                                         part_num,dev_desc->dev);
200                         return(-1);
201                 }
202         }
203         /* if we reach this point entire sector has been
204          * searched w/o succsess */
205         if(verb)
206                 printf ("** Partition %d not found on device %d **\n",
207                         part_num,dev_desc->dev);
208         return(-1);
209 found:
210         if(pide->boot_ind!=0x88) {
211                 if(verb)
212                         printf ("** Partition %d is not bootable on device %d **\n",
213                                 part_num,dev_desc->dev);
214                 return (-1);
215         }
216         switch(pide->boot_media) {
217                 case 0x00: /* no emulation */
218                         info->size=le16_to_int(pide->sec_cnt)>>2;
219                         break;
220                 case 0x01:      info->size=2400>>2; break; /* 1.2MByte Floppy */
221                 case 0x02:      info->size=2880>>2; break; /* 1.44MByte Floppy */
222                 case 0x03:      info->size=5760>>2; break; /* 2.88MByte Floppy */
223                 case 0x04:      info->size=2880>>2; break; /* dummy (HD Emulation) */
224                 default:        info->size=0; break;
225         }
226         newblkaddr=le32_to_int(pide->rel_block_addr);
227         info->start=newblkaddr;
228         PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
229         return 0;
230 }
231
232 int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
233 {
234         return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
235 }
236
237
238 void print_part_iso(block_dev_desc_t * dev_desc)
239 {
240         disk_partition_t info;
241         int i;
242         if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
243                 printf("** No boot partition found on device %d **\n",dev_desc->dev);
244                 return;
245         }
246         printf("Part   Start     Sect x Size Type\n");
247         i=0;
248         do {
249                 printf (" %2d %8ld %8ld %6ld %.32s\n",
250                         i, info.start, info.size, info.blksz, info.type);
251                 i++;
252         } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
253 }
254
255 int test_part_iso (block_dev_desc_t *dev_desc)
256 {
257         disk_partition_t info;
258
259         return(get_partition_info_iso_verb(dev_desc,0,&info,0));
260 }
261
262 #endif