disk/: Remove obsolete references to CONFIG_COMMANDS
[platform/kernel/u-boot.git] / disk / part_dos.c
1 /*
2  * (C) Copyright 2001
3  * Raymond Lo, lo@routefree.com
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  *
6  * See file CREDITS for list of people who contributed to this
7  * project.
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License as
11  * published by the Free Software Foundation; either version 2 of
12  * the License, or (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22  * MA 02111-1307 USA
23  */
24
25 /*
26  * Support for harddisk partitions.
27  *
28  * To be compatible with LinuxPPC and Apple we use the standard Apple
29  * SCSI disk partitioning scheme. For more information see:
30  * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
31  */
32
33 #include <common.h>
34 #include <command.h>
35 #include <ide.h>
36 #include "part_dos.h"
37
38 #if (defined(CONFIG_CMD_IDE) || \
39      defined(CONFIG_CMD_SCSI) || \
40      defined(CONFIG_CMD_USB) || \
41      defined(CONFIG_MMC) || \
42      defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_DOS_PARTITION)
43
44 /* Convert char[4] in little endian format to the host format integer
45  */
46 static inline int le32_to_int(unsigned char *le32)
47 {
48     return ((le32[3] << 24) +
49             (le32[2] << 16) +
50             (le32[1] << 8) +
51              le32[0]
52            );
53 }
54
55 static inline int is_extended(int part_type)
56 {
57     return (part_type == 0x5 ||
58             part_type == 0xf ||
59             part_type == 0x85);
60 }
61
62 static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num)
63 {
64         int lba_start = ext_part_sector + le32_to_int (p->start4);
65         int lba_size  = le32_to_int (p->size4);
66
67         printf ("%5d\t\t%10d\t%10d\t%2x%s\n",
68                 part_num, lba_start, lba_size, p->sys_ind,
69                 (is_extended (p->sys_ind) ? " Extd" : ""));
70 }
71
72 static int test_block_type(unsigned char *buffer)
73 {
74         if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
75             (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
76                 return (-1);
77         } /* no DOS Signature at all */
78         if(strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0)
79                 return DOS_PBR; /* is PBR */
80         return DOS_MBR;     /* Is MBR */
81 }
82
83
84 int test_part_dos (block_dev_desc_t *dev_desc)
85 {
86         unsigned char buffer[DEFAULT_SECTOR_SIZE];
87
88         if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
89             (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
90             (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
91                 return (-1);
92         }
93         return (0);
94 }
95
96 /*  Print a partition that is relative to its Extended partition table
97  */
98 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
99                                                            int part_num)
100 {
101         unsigned char buffer[DEFAULT_SECTOR_SIZE];
102         dos_partition_t *pt;
103         int i;
104
105         if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
106                 printf ("** Can't read partition table on %d:%d **\n",
107                         dev_desc->dev, ext_part_sector);
108                 return;
109         }
110         i=test_block_type(buffer);
111         if(i==-1) {
112                 printf ("bad MBR sector signature 0x%02x%02x\n",
113                         buffer[DOS_PART_MAGIC_OFFSET],
114                         buffer[DOS_PART_MAGIC_OFFSET + 1]);
115                 return;
116         }
117         if(i==DOS_PBR) {
118                 printf ("    1\t\t         0\t%10ld\t%2x\n",
119                         dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]);
120                 return;
121         }
122         /* Print all primary/logical partitions */
123         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
124         for (i = 0; i < 4; i++, pt++) {
125                 /*
126                  * fdisk does not show the extended partitions that
127                  * are not in the MBR
128                  */
129
130                 if ((pt->sys_ind != 0) &&
131                     (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
132                         print_one_part (pt, ext_part_sector, part_num);
133                 }
134
135                 /* Reverse engr the fdisk part# assignment rule! */
136                 if ((ext_part_sector == 0) ||
137                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
138                         part_num++;
139                 }
140         }
141
142         /* Follows the extended partitions */
143         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
144         for (i = 0; i < 4; i++, pt++) {
145                 if (is_extended (pt->sys_ind)) {
146                         int lba_start = le32_to_int (pt->start4) + relative;
147
148                         print_partition_extended (dev_desc, lba_start,
149                                                   ext_part_sector == 0  ? lba_start
150                                                                         : relative,
151                                                   part_num);
152                 }
153         }
154
155         return;
156 }
157
158
159 /*  Print a partition that is relative to its Extended partition table
160  */
161 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
162                                  int relative, int part_num,
163                                  int which_part, disk_partition_t *info)
164 {
165         unsigned char buffer[DEFAULT_SECTOR_SIZE];
166         dos_partition_t *pt;
167         int i;
168
169         if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
170                 printf ("** Can't read partition table on %d:%d **\n",
171                         dev_desc->dev, ext_part_sector);
172                 return -1;
173         }
174         if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
175                 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
176                 printf ("bad MBR sector signature 0x%02x%02x\n",
177                         buffer[DOS_PART_MAGIC_OFFSET],
178                         buffer[DOS_PART_MAGIC_OFFSET + 1]);
179                 return -1;
180         }
181
182         /* Print all primary/logical partitions */
183         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
184         for (i = 0; i < 4; i++, pt++) {
185                 /*
186                  * fdisk does not show the extended partitions that
187                  * are not in the MBR
188                  */
189                 if ((pt->sys_ind != 0) &&
190                     (part_num == which_part) &&
191                     (is_extended(pt->sys_ind) == 0)) {
192                         info->blksz = 512;
193                         info->start = ext_part_sector + le32_to_int (pt->start4);
194                         info->size  = le32_to_int (pt->size4);
195                         switch(dev_desc->if_type) {
196                                 case IF_TYPE_IDE:
197                                 case IF_TYPE_ATAPI:
198                                         sprintf ((char *)info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num);
199                                         break;
200                                 case IF_TYPE_SCSI:
201                                         sprintf ((char *)info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num);
202                                         break;
203                                 case IF_TYPE_USB:
204                                         sprintf ((char *)info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num);
205                                         break;
206                                 case IF_TYPE_DOC:
207                                         sprintf ((char *)info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num);
208                                         break;
209                                 default:
210                                         sprintf ((char *)info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num);
211                                         break;
212                         }
213                         /* sprintf(info->type, "%d, pt->sys_ind); */
214                         sprintf ((char *)info->type, "U-Boot");
215                         return 0;
216                 }
217
218                 /* Reverse engr the fdisk part# assignment rule! */
219                 if ((ext_part_sector == 0) ||
220                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
221                         part_num++;
222                 }
223         }
224
225         /* Follows the extended partitions */
226         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
227         for (i = 0; i < 4; i++, pt++) {
228                 if (is_extended (pt->sys_ind)) {
229                         int lba_start = le32_to_int (pt->start4) + relative;
230
231                         return get_partition_info_extended (dev_desc, lba_start,
232                                  ext_part_sector == 0 ? lba_start : relative,
233                                  part_num, which_part, info);
234                 }
235         }
236         return -1;
237 }
238
239 void print_part_dos (block_dev_desc_t *dev_desc)
240 {
241         printf ("Partition     Start Sector     Num Sectors     Type\n");
242         print_partition_extended (dev_desc, 0, 0, 1);
243 }
244
245 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
246 {
247         return get_partition_info_extended (dev_desc, 0, 0, 1, part, info);
248 }
249
250
251 #endif