disk/part_mac.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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 /*
  25  * Support for harddisk partitions.
  26  *
  27  * To be compatible with LinuxPPC and Apple we use the standard Apple
  28  * SCSI disk partitioning scheme. For more information see:
  29  * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
  30  */
  31
  32 #include <common.h>
  33 #include <command.h>
  34 #include <ide.h>
  35 #include "part_mac.h"
  36
  37 #if (defined(CONFIG_CMD_IDE) || \
  38      defined(CONFIG_CMD_SCSI) || \
  39      defined(CONFIG_CMD_SATA) || \
  40      defined(CONFIG_CMD_USB) || \
  41      defined(CONFIG_MMC) || \
  42      defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_MAC_PARTITION)
  43
  44 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
  45 #ifndef __ldiv_t_defined
  46 typedef struct {
  47         long int quot;          /* Quotient     */
  48         long int rem;           /* Remainder    */
  49 } ldiv_t;
  50 extern ldiv_t ldiv (long int __numer, long int __denom);
  51 # define __ldiv_t_defined       1
  52 #endif
  53
  54
  55 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p);
  56 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p);
  57
  58 /*
  59  * Test for a valid MAC partition
  60  */
  61 int test_part_mac (block_dev_desc_t *dev_desc)
  62 {
  63         mac_driver_desc_t       ddesc;
  64         mac_partition_t         mpart;
  65         ulong i, n;
  66
  67         if (part_mac_read_ddb (dev_desc, &ddesc)) {
  68                 /* error reading Driver Desriptor Block, or no valid Signature */
  69                 return (-1);
  70         }
  71
  72         n = 1;  /* assuming at least one partition */
  73         for (i=1; i<=n; ++i) {
  74                 if ((dev_desc->block_read(dev_desc->dev, i, 1, (ulong *)&mpart) != 1) ||
  75                     (mpart.signature != MAC_PARTITION_MAGIC) ) {
  76                         return (-1);
  77                 }
  78                 /* update partition count */
  79                 n = mpart.map_count;
  80         }
  81         return (0);
  82 }
  83
  84
  85 void print_part_mac (block_dev_desc_t *dev_desc)
  86 {
  87         ulong i, n;
  88         mac_driver_desc_t       ddesc;
  89         mac_partition_t         mpart;
  90         ldiv_t mb, gb;
  91
  92         if (part_mac_read_ddb (dev_desc, &ddesc)) {
  93                 /* error reading Driver Desriptor Block, or no valid Signature */
  94                 return;
  95         }
  96
  97         n  = ddesc.blk_count;
  98
  99         mb = ldiv(n, ((1024 * 1024) / ddesc.blk_size)); /* MB */
 100         /* round to 1 digit */
 101         mb.rem *= 10 * ddesc.blk_size;
 102         mb.rem += 512 * 1024;
 103         mb.rem /= 1024 * 1024;
 104
 105         gb = ldiv(10 * mb.quot + mb.rem, 10240);
 106         gb.rem += 512;
 107         gb.rem /= 1024;
 108
 109
 110         printf ("Block Size=%d, Number of Blocks=%d, "
 111                 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
 112                 "DeviceType=0x%x, DeviceId=0x%x\n\n"
 113                 "   #:                 type name"
 114                 "                   length   base       (size)\n",
 115                 ddesc.blk_size,
 116                 ddesc.blk_count,
 117                 mb.quot, mb.rem, gb.quot, gb.rem,
 118                 ddesc.dev_type, ddesc.dev_id
 119                 );
 120
 121         n = 1;  /* assuming at least one partition */
 122         for (i=1; i<=n; ++i) {
 123                 ulong bytes;
 124                 char c;
 125
 126                 printf ("%4ld: ", i);
 127                 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *)&mpart) != 1) {
 128                         printf ("** Can't read Partition Map on %d:%ld **\n",
 129                                 dev_desc->dev, i);
 130                         return;
 131                 }
 132
 133                 if (mpart.signature != MAC_PARTITION_MAGIC) {
 134                         printf ("** Bad Signature on %d:%ld - "
 135                                 "expected 0x%04x, got 0x%04x\n",
 136                                 dev_desc->dev, i, MAC_PARTITION_MAGIC, mpart.signature);
 137                         return;
 138                 }
 139
 140                 /* update partition count */
 141                 n = mpart.map_count;
 142
 143                 c      = 'k';
 144                 bytes  = mpart.block_count;
 145                 bytes /= (1024 / ddesc.blk_size);  /* kB; assumes blk_size == 512 */
 146                 if (bytes >= 1024) {
 147                         bytes >>= 10;
 148                         c = 'M';
 149                 }
 150                 if (bytes >= 1024) {
 151                         bytes >>= 10;
 152                         c = 'G';
 153                 }
 154
 155                 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
 156                         mpart.type,
 157                         mpart.name,
 158                         mpart.block_count,
 159                         mpart.start_block,
 160                         bytes, c
 161                         );
 162         }
 163
 164         return;
 165 }
 166
 167
 168 /*
 169  * Read Device Descriptor Block
 170  */
 171 static int part_mac_read_ddb (block_dev_desc_t *dev_desc, mac_driver_desc_t *ddb_p)
 172 {
 173         if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)ddb_p) != 1) {
 174                 printf ("** Can't read Driver Desriptor Block **\n");
 175                 return (-1);
 176         }
 177
 178         if (ddb_p->signature != MAC_DRIVER_MAGIC) {
 179 #if 0
 180                 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n",
 181                         MAC_DRIVER_MAGIC, ddb_p->signature);
 182 #endif
 183                 return (-1);
 184         }
 185         return (0);
 186 }
 187
 188 /*
 189  * Read Partition Descriptor Block
 190  */
 191 static int part_mac_read_pdb (block_dev_desc_t *dev_desc, int part, mac_partition_t *pdb_p)
 192 {
 193         int n = 1;
 194
 195         for (;;) {
 196                 /*
 197                  * We must always read the descritpor block for
 198                  * partition 1 first since this is the only way to
 199                  * know how many partitions we have.
 200                  */
 201                 if (dev_desc->block_read (dev_desc->dev, n, 1, (ulong *)pdb_p) != 1) {
 202                         printf ("** Can't read Partition Map on %d:%d **\n",
 203                                 dev_desc->dev, n);
 204                         return (-1);
 205                 }
 206
 207                 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
 208                         printf ("** Bad Signature on %d:%d: "
 209                                 "expected 0x%04x, got 0x%04x\n",
 210                                 dev_desc->dev, n, MAC_PARTITION_MAGIC, pdb_p->signature);
 211                         return (-1);
 212                 }
 213
 214                 if (n == part)
 215                         return (0);
 216
 217                 if ((part < 1) || (part > pdb_p->map_count)) {
 218                         printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
 219                                 dev_desc->dev, part,
 220                                 dev_desc->dev,
 221                                 dev_desc->dev, pdb_p->map_count);
 222                         return (-1);
 223                 }
 224
 225                 /* update partition count */
 226                 n = part;
 227         }
 228
 229         /* NOTREACHED */
 230 }
 231
 232 int get_partition_info_mac (block_dev_desc_t *dev_desc, int part, disk_partition_t *info)
 233 {
 234         mac_driver_desc_t       ddesc;
 235         mac_partition_t         mpart;
 236
 237         if (part_mac_read_ddb (dev_desc, &ddesc)) {
 238                 return (-1);
 239         }
 240
 241         info->blksz = ddesc.blk_size;
 242
 243         if (part_mac_read_pdb (dev_desc, part, &mpart)) {
 244                 return (-1);
 245         }
 246
 247         info->start = mpart.start_block;
 248         info->size  = mpart.block_count;
 249         memcpy (info->type, mpart.type, sizeof(info->type));
 250         memcpy (info->name, mpart.name, sizeof(info->name));
 251
 252         return (0);
 253 }
 254
 255 #endif