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[u-boot] / disk / part_mac.c
1 /*
2  * (C) Copyright 2000
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 /*
9  * Support for harddisk partitions.
10  *
11  * To be compatible with LinuxPPC and Apple we use the standard Apple
12  * SCSI disk partitioning scheme. For more information see:
13  * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
14  */
15
16 #include <common.h>
17 #include <command.h>
18 #include <memalign.h>
19 #include <ide.h>
20 #include "part_mac.h"
21
22 #ifdef HAVE_BLOCK_DEVICE
23
24 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
25 #ifndef __ldiv_t_defined
26 typedef struct {
27         long int quot;          /* Quotient     */
28         long int rem;           /* Remainder    */
29 } ldiv_t;
30 extern ldiv_t ldiv (long int __numer, long int __denom);
31 # define __ldiv_t_defined       1
32 #endif
33
34
35 static int part_mac_read_ddb(struct blk_desc *dev_desc,
36                              mac_driver_desc_t *ddb_p);
37 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
38                              mac_partition_t *pdb_p);
39
40 /*
41  * Test for a valid MAC partition
42  */
43 static int part_test_mac(struct blk_desc *dev_desc)
44 {
45         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
46         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
47         ulong i, n;
48
49         if (part_mac_read_ddb (dev_desc, ddesc)) {
50                 /* error reading Driver Desriptor Block, or no valid Signature */
51                 return (-1);
52         }
53
54         n = 1;  /* assuming at least one partition */
55         for (i=1; i<=n; ++i) {
56                 if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
57                     (mpart->signature != MAC_PARTITION_MAGIC) ) {
58                         return (-1);
59                 }
60                 /* update partition count */
61                 n = mpart->map_count;
62         }
63         return (0);
64 }
65
66 static void part_print_mac(struct blk_desc *dev_desc)
67 {
68         ulong i, n;
69         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
70         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
71         ldiv_t mb, gb;
72
73         if (part_mac_read_ddb (dev_desc, ddesc)) {
74                 /* error reading Driver Desriptor Block, or no valid Signature */
75                 return;
76         }
77
78         n  = ddesc->blk_count;
79
80         mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
81         /* round to 1 digit */
82         mb.rem *= 10 * ddesc->blk_size;
83         mb.rem += 512 * 1024;
84         mb.rem /= 1024 * 1024;
85
86         gb = ldiv(10 * mb.quot + mb.rem, 10240);
87         gb.rem += 512;
88         gb.rem /= 1024;
89
90
91         printf ("Block Size=%d, Number of Blocks=%d, "
92                 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
93                 "DeviceType=0x%x, DeviceId=0x%x\n\n"
94                 "   #:                 type name"
95                 "                   length   base       (size)\n",
96                 ddesc->blk_size,
97                 ddesc->blk_count,
98                 mb.quot, mb.rem, gb.quot, gb.rem,
99                 ddesc->dev_type, ddesc->dev_id
100                 );
101
102         n = 1;  /* assuming at least one partition */
103         for (i=1; i<=n; ++i) {
104                 ulong bytes;
105                 char c;
106
107                 printf ("%4ld: ", i);
108                 if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
109                         printf ("** Can't read Partition Map on %d:%ld **\n",
110                                 dev_desc->devnum, i);
111                         return;
112                 }
113
114                 if (mpart->signature != MAC_PARTITION_MAGIC) {
115                         printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
116                                dev_desc->devnum, i, MAC_PARTITION_MAGIC,
117                                mpart->signature);
118                         return;
119                 }
120
121                 /* update partition count */
122                 n = mpart->map_count;
123
124                 c      = 'k';
125                 bytes  = mpart->block_count;
126                 bytes /= (1024 / ddesc->blk_size);  /* kB; assumes blk_size == 512 */
127                 if (bytes >= 1024) {
128                         bytes >>= 10;
129                         c = 'M';
130                 }
131                 if (bytes >= 1024) {
132                         bytes >>= 10;
133                         c = 'G';
134                 }
135
136                 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
137                         mpart->type,
138                         mpart->name,
139                         mpart->block_count,
140                         mpart->start_block,
141                         bytes, c
142                         );
143         }
144
145         return;
146 }
147
148
149 /*
150  * Read Device Descriptor Block
151  */
152 static int part_mac_read_ddb(struct blk_desc *dev_desc,
153                              mac_driver_desc_t *ddb_p)
154 {
155         if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
156                 printf ("** Can't read Driver Desriptor Block **\n");
157                 return (-1);
158         }
159
160         if (ddb_p->signature != MAC_DRIVER_MAGIC) {
161 #if 0
162                 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n",
163                         MAC_DRIVER_MAGIC, ddb_p->signature);
164 #endif
165                 return (-1);
166         }
167         return (0);
168 }
169
170 /*
171  * Read Partition Descriptor Block
172  */
173 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
174                              mac_partition_t *pdb_p)
175 {
176         int n = 1;
177
178         for (;;) {
179                 /*
180                  * We must always read the descritpor block for
181                  * partition 1 first since this is the only way to
182                  * know how many partitions we have.
183                  */
184                 if (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
185                         printf ("** Can't read Partition Map on %d:%d **\n",
186                                 dev_desc->devnum, n);
187                         return (-1);
188                 }
189
190                 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
191                         printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
192                                dev_desc->devnum, n, MAC_PARTITION_MAGIC,
193                                pdb_p->signature);
194                         return (-1);
195                 }
196
197                 if (n == part)
198                         return (0);
199
200                 if ((part < 1) || (part > pdb_p->map_count)) {
201                         printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
202                                 dev_desc->devnum, part,
203                                 dev_desc->devnum,
204                                 dev_desc->devnum, pdb_p->map_count);
205                         return (-1);
206                 }
207
208                 /* update partition count */
209                 n = part;
210         }
211
212         /* NOTREACHED */
213 }
214
215 static int part_get_info_mac(struct blk_desc *dev_desc, int part,
216                                   disk_partition_t *info)
217 {
218         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
219         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
220
221         if (part_mac_read_ddb (dev_desc, ddesc)) {
222                 return (-1);
223         }
224
225         info->blksz = ddesc->blk_size;
226
227         if (part_mac_read_pdb (dev_desc, part, mpart)) {
228                 return (-1);
229         }
230
231         info->start = mpart->start_block;
232         info->size  = mpart->block_count;
233         memcpy (info->type, mpart->type, sizeof(info->type));
234         memcpy (info->name, mpart->name, sizeof(info->name));
235
236         return (0);
237 }
238
239 U_BOOT_PART_TYPE(mac) = {
240         .name           = "MAC",
241         .part_type      = PART_TYPE_MAC,
242         .get_info       = part_get_info_mac,
243         .print          = part_print_mac,
244         .test           = part_test_mac,
245 };
246 #endif