]> git.sur5r.net Git - u-boot/blob - disk/part_iso.c
iso: Allow 512 byte sector size
[u-boot] / disk / part_iso.c
1 /*
2  * (C) Copyright 2001
3  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <command.h>
10 #include <asm/unaligned.h>
11 #include "part_iso.h"
12
13 #ifdef HAVE_BLOCK_DEVICE
14
15 /* #define      ISO_PART_DEBUG */
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
27 static unsigned char tmpbuf[CD_SECTSIZE];
28
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
48 /* only boot records will be listed as valid partitions */
49 int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num,
50                            disk_partition_t *info, int verb)
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
61         if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512))
62                 return -1;
63
64         /* the first sector (sector 0x10) must be a primary volume desc */
65         blkaddr=PVD_OFFSET;
66         if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
67                 return -1;
68         if(ppr->desctype!=0x01) {
69                 if(verb)
70                         printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
71                                 dev_desc->devnum, part_num);
72                 return (-1);
73         }
74         if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
75                 if(verb)
76                         printf ("** Wrong ISO Ident: %s on %d:%d **\n",
77                                 ppr->stand_ident, dev_desc->devnum, part_num);
78                 return (-1);
79         }
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);
83         PRINTF(" Lastsect:%08lx\n",lastsect);
84         for(i=blkaddr;i<lastsect;i++) {
85                 PRINTF("Reading block %d\n", i);
86                 if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
87                         return -1;
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",
93                                         dev_desc->devnum, part_num);
94                         return (-1);
95                 }
96         }
97         /* boot entry found */
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",
101                                 pbr->ident_str, dev_desc->devnum, part_num);
102                 return (-1);
103         }
104         bootaddr = get_unaligned_le32(pbr->pointer);
105         PRINTF(" Boot Entry at: %08lX\n",bootaddr);
106         if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
107                 if(verb)
108                         printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
109                                 bootaddr, dev_desc->devnum, part_num);
110                 return (-1);
111         }
112         chksum=0;
113         chksumbuf = (unsigned short *)tmpbuf;
114         for(i=0;i<0x10;i++)
115                 chksum += le16_to_cpu(chksumbuf[i]);
116         if(chksum!=0) {
117                 if(verb)
118                         printf("** Checksum Error in booting catalog validation entry on %d:%d **\n",
119                                dev_desc->devnum, part_num);
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",
125                                 dev_desc->devnum, part_num);
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",
132                                 dev_desc->devnum, part_num);
133                 return(-1);
134         }
135 #endif
136         /* the validation entry seems to be ok, now search the "partition" */
137         entry_num=1;
138         offset=0x20;
139         strcpy((char *)info->type, "U-Boot");
140         switch(dev_desc->if_type) {
141                 case IF_TYPE_IDE:
142                 case IF_TYPE_SATA:
143                 case IF_TYPE_ATAPI:
144                         sprintf ((char *)info->name, "hd%c%d",
145                                 'a' + dev_desc->devnum, part_num);
146                         break;
147                 case IF_TYPE_SCSI:
148                         sprintf ((char *)info->name, "sd%c%d",
149                                 'a' + dev_desc->devnum, part_num);
150                         break;
151                 case IF_TYPE_USB:
152                         sprintf ((char *)info->name, "usbd%c%d",
153                                 'a' + dev_desc->devnum, part_num);
154                         break;
155                 case IF_TYPE_DOC:
156                         sprintf ((char *)info->name, "docd%c%d",
157                                 'a' + dev_desc->devnum, part_num);
158                         break;
159                 default:
160                         sprintf ((char *)info->name, "xx%c%d",
161                                 'a' + dev_desc->devnum, part_num);
162                         break;
163         }
164         /* the bootcatalog (including validation Entry) is limited to 2048Bytes
165          * (63 boot entries + validation entry) */
166          while(offset<2048) {
167                 pide=(iso_init_def_entry_t *)&tmpbuf[offset];
168                 if ((pide->boot_ind==0x88) ||
169                     (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
170                         if(entry_num==part_num) { /* part found */
171                                 goto found;
172                         }
173                         entry_num++; /* count partitions Entries (boot and non bootables */
174                         offset+=0x20;
175                         continue;
176                 }
177                 if ((pide->boot_ind==0x90) ||   /* Section Header Entry */
178                     (pide->boot_ind==0x91) ||   /* Section Header Entry (last) */
179                     (pide->boot_ind==0x44)) {   /* Extension Indicator */
180                         offset+=0x20; /* skip unused entries */
181                 }
182                 else {
183                         if(verb)
184                                 printf ("** Partition %d not found on device %d **\n",
185                                         part_num, dev_desc->devnum);
186                         return(-1);
187                 }
188         }
189         /* if we reach this point entire sector has been
190          * searched w/o succsess */
191         if(verb)
192                 printf ("** Partition %d not found on device %d **\n",
193                         part_num, dev_desc->devnum);
194         return(-1);
195 found:
196         if(pide->boot_ind!=0x88) {
197                 if(verb)
198                         printf("** Partition %d is not bootable on device %d **\n",
199                                part_num, dev_desc->devnum);
200                 return (-1);
201         }
202         switch(pide->boot_media) {
203                 case 0x00: /* no emulation */
204                         info->size = get_unaligned_le16(pide->sec_cnt)>>2;
205                         break;
206                 case 0x01:      info->size=2400>>2; break; /* 1.2MByte Floppy */
207                 case 0x02:      info->size=2880>>2; break; /* 1.44MByte Floppy */
208                 case 0x03:      info->size=5760>>2; break; /* 2.88MByte Floppy */
209                 case 0x04:      info->size=2880>>2; break; /* dummy (HD Emulation) */
210                 default:        info->size=0; break;
211         }
212         newblkaddr = get_unaligned_le32(pide->rel_block_addr);
213         info->start=newblkaddr;
214
215         if (dev_desc->blksz == 512) {
216                 info->size *= 4;
217                 info->start *= 4;
218                 info->blksz = 512;
219         }
220
221         PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size);
222         return 0;
223 }
224
225 static int part_get_info_iso(struct blk_desc *dev_desc, int part_num,
226                                   disk_partition_t *info)
227 {
228         return part_get_info_iso_verb(dev_desc, part_num, info, 1);
229 }
230
231 static void part_print_iso(struct blk_desc *dev_desc)
232 {
233         disk_partition_t info;
234         int i;
235
236         if (part_get_info_iso_verb(dev_desc, 0, &info, 0) == -1) {
237                 printf("** No boot partition found on device %d **\n",
238                        dev_desc->devnum);
239                 return;
240         }
241         printf("Part   Start     Sect x Size Type\n");
242         i=0;
243         do {
244                 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
245                        i, info.start, info.size, info.blksz, info.type);
246                 i++;
247         } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1);
248 }
249
250 static int part_test_iso(struct blk_desc *dev_desc)
251 {
252         disk_partition_t info;
253
254         return part_get_info_iso_verb(dev_desc, 1, &info, 1);
255 }
256
257 U_BOOT_PART_TYPE(iso) = {
258         .name           = "ISO",
259         .part_type      = PART_TYPE_ISO,
260         .get_info       = part_get_info_iso,
261         .print          = part_print_iso,
262         .test           = part_test_iso,
263 };
264 #endif