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[people/ms/u-boot.git] / 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, 1, &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=1;
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