arm: mvebu: drivers/ddr: remove redundant assignment
[oweals/u-boot.git] / disk / part_iso.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2001
4  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
5  */
6
7 #include <common.h>
8 #include <command.h>
9 #include <asm/unaligned.h>
10 #include "part_iso.h"
11
12 #ifdef CONFIG_HAVE_BLOCK_DEVICE
13
14 /* #define      ISO_PART_DEBUG */
15
16 #ifdef  ISO_PART_DEBUG
17 #define PRINTF(fmt,args...)     printf (fmt ,##args)
18 #else
19 #define PRINTF(fmt,args...)
20 #endif
21
22 /* enable this if CDs are written with the PowerPC Platform ID */
23 #undef CHECK_FOR_POWERPC_PLATTFORM
24 #define CD_SECTSIZE 2048
25
26 static unsigned char tmpbuf[CD_SECTSIZE] __aligned(ARCH_DMA_MINALIGN);
27
28 unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start,
29                         lbaint_t blkcnt, void *buffer)
30 {
31         unsigned long ret;
32
33         if (block_dev->blksz == 512) {
34                 /* Convert from 2048 to 512 sector size */
35                 start *= 4;
36                 blkcnt *= 4;
37         }
38
39         ret = blk_dread(block_dev, start, blkcnt, buffer);
40
41         if (block_dev->blksz == 512)
42                 ret /= 4;
43
44         return ret;
45 }
46
47 /* only boot records will be listed as valid partitions */
48 int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num,
49                            disk_partition_t *info, int verb)
50 {
51         int i,offset,entry_num;
52         unsigned short *chksumbuf;
53         unsigned short chksum;
54         unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
55         iso_boot_rec_t *pbr = (iso_boot_rec_t   *)tmpbuf; /* boot record */
56         iso_pri_rec_t *ppr = (iso_pri_rec_t     *)tmpbuf;       /* primary desc */
57         iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
58         iso_init_def_entry_t *pide;
59
60         if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512))
61                 return -1;
62
63         /* the first sector (sector 0x10) must be a primary volume desc */
64         blkaddr=PVD_OFFSET;
65         if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1)
66                 return -1;
67         if(ppr->desctype!=0x01) {
68                 if(verb)
69                         printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
70                                 dev_desc->devnum, part_num);
71                 return (-1);
72         }
73         if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
74                 if(verb)
75                         printf ("** Wrong ISO Ident: %s on %d:%d **\n",
76                                 ppr->stand_ident, dev_desc->devnum, part_num);
77                 return (-1);
78         }
79         lastsect = le32_to_cpu(ppr->firstsek_LEpathtab1_LE);
80         /* assuming same block size for all entries */
81         info->blksz = be16_to_cpu(ppr->secsize_BE);
82         PRINTF(" Lastsect:%08lx\n",lastsect);
83         for(i=blkaddr;i<lastsect;i++) {
84                 PRINTF("Reading block %d\n", i);
85                 if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1)
86                         return -1;
87                 if(ppr->desctype==0x00)
88                         break; /* boot entry found */
89                 if(ppr->desctype==0xff) {
90                         if(verb)
91                                 printf ("** No valid boot catalog found on %d:%d **\n",
92                                         dev_desc->devnum, part_num);
93                         return (-1);
94                 }
95         }
96         /* boot entry found */
97         if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
98                 if(verb)
99                         printf ("** Wrong El Torito ident: %s on %d:%d **\n",
100                                 pbr->ident_str, dev_desc->devnum, part_num);
101                 return (-1);
102         }
103         bootaddr = get_unaligned_le32(pbr->pointer);
104         PRINTF(" Boot Entry at: %08lX\n",bootaddr);
105         if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) {
106                 if(verb)
107                         printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
108                                 bootaddr, dev_desc->devnum, part_num);
109                 return (-1);
110         }
111         chksum=0;
112         chksumbuf = (unsigned short *)tmpbuf;
113         for(i=0;i<0x10;i++)
114                 chksum += le16_to_cpu(chksumbuf[i]);
115         if(chksum!=0) {
116                 if(verb)
117                         printf("** Checksum Error in booting catalog validation entry on %d:%d **\n",
118                                dev_desc->devnum, part_num);
119                 return (-1);
120         }
121         if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
122                 if(verb)
123                         printf ("** Key 0x55 0xAA error on %d:%d **\n",
124                                 dev_desc->devnum, part_num);
125                 return(-1);
126         }
127 #ifdef CHECK_FOR_POWERPC_PLATTFORM
128         if(pve->platform!=0x01) {
129                 if(verb)
130                         printf ("** No PowerPC platform CD on %d:%d **\n",
131                                 dev_desc->devnum, part_num);
132                 return(-1);
133         }
134 #endif
135         /* the validation entry seems to be ok, now search the "partition" */
136         entry_num=1;
137         offset=0x20;
138         strcpy((char *)info->type, "U-Boot");
139         part_set_generic_name(dev_desc, part_num, (char *)info->name);
140         /* the bootcatalog (including validation Entry) is limited to 2048Bytes
141          * (63 boot entries + validation entry) */
142          while(offset<2048) {
143                 pide=(iso_init_def_entry_t *)&tmpbuf[offset];
144                 if ((pide->boot_ind==0x88) ||
145                     (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
146                         if(entry_num==part_num) { /* part found */
147                                 goto found;
148                         }
149                         entry_num++; /* count partitions Entries (boot and non bootables */
150                         offset+=0x20;
151                         continue;
152                 }
153                 if ((pide->boot_ind==0x90) ||   /* Section Header Entry */
154                     (pide->boot_ind==0x91) ||   /* Section Header Entry (last) */
155                     (pide->boot_ind==0x44)) {   /* Extension Indicator */
156                         offset+=0x20; /* skip unused entries */
157                 }
158                 else {
159                         if(verb)
160                                 printf ("** Partition %d not found on device %d **\n",
161                                         part_num, dev_desc->devnum);
162                         return(-1);
163                 }
164         }
165         /* if we reach this point entire sector has been
166          * searched w/o succsess */
167         if(verb)
168                 printf ("** Partition %d not found on device %d **\n",
169                         part_num, dev_desc->devnum);
170         return(-1);
171 found:
172         if(pide->boot_ind!=0x88) {
173                 if(verb)
174                         printf("** Partition %d is not bootable on device %d **\n",
175                                part_num, dev_desc->devnum);
176                 return (-1);
177         }
178         switch(pide->boot_media) {
179                 case 0x00: /* no emulation */
180                         info->size = get_unaligned_le16(pide->sec_cnt)>>2;
181                         break;
182                 case 0x01:      info->size=2400>>2; break; /* 1.2MByte Floppy */
183                 case 0x02:      info->size=2880>>2; break; /* 1.44MByte Floppy */
184                 case 0x03:      info->size=5760>>2; break; /* 2.88MByte Floppy */
185                 case 0x04:      info->size=2880>>2; break; /* dummy (HD Emulation) */
186                 default:        info->size=0; break;
187         }
188         newblkaddr = get_unaligned_le32(pide->rel_block_addr);
189         info->start=newblkaddr;
190
191         if (dev_desc->blksz == 512) {
192                 info->size *= 4;
193                 info->start *= 4;
194                 info->blksz = 512;
195         }
196
197         PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size);
198         return 0;
199 }
200
201 static int part_get_info_iso(struct blk_desc *dev_desc, int part_num,
202                                   disk_partition_t *info)
203 {
204         return part_get_info_iso_verb(dev_desc, part_num, info, 0);
205 }
206
207 static void part_print_iso(struct blk_desc *dev_desc)
208 {
209         disk_partition_t info;
210         int i;
211
212         if (part_get_info_iso_verb(dev_desc, 1, &info, 0) == -1) {
213                 printf("** No boot partition found on device %d **\n",
214                        dev_desc->devnum);
215                 return;
216         }
217         printf("Part   Start     Sect x Size Type\n");
218         i=1;
219         do {
220                 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
221                        i, info.start, info.size, info.blksz, info.type);
222                 i++;
223         } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1);
224 }
225
226 static int part_test_iso(struct blk_desc *dev_desc)
227 {
228         disk_partition_t info;
229
230         return part_get_info_iso_verb(dev_desc, 1, &info, 0);
231 }
232
233 U_BOOT_PART_TYPE(iso) = {
234         .name           = "ISO",
235         .part_type      = PART_TYPE_ISO,
236         .max_entries    = ISO_ENTRY_NUMBERS,
237         .get_info       = part_get_info_iso,
238         .print          = part_print_iso,
239         .test           = part_test_iso,
240 };
241 #endif