d597dcf00ae01d6f66018b7451d5d60d888e20bf
[platform/kernel/u-boot.git] / 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                 /*
51                  * error reading Driver Descriptor Block,
52                  * or no valid Signature
53                  */
54                 return (-1);
55         }
56
57         n = 1;  /* assuming at least one partition */
58         for (i=1; i<=n; ++i) {
59                 if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
60                     (mpart->signature != MAC_PARTITION_MAGIC) ) {
61                         return (-1);
62                 }
63                 /* update partition count */
64                 n = mpart->map_count;
65         }
66         return (0);
67 }
68
69 static void part_print_mac(struct blk_desc *dev_desc)
70 {
71         ulong i, n;
72         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
73         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
74         ldiv_t mb, gb;
75
76         if (part_mac_read_ddb (dev_desc, ddesc)) {
77                 /*
78                  * error reading Driver Descriptor Block,
79                  * or no valid Signature
80                  */
81                 return;
82         }
83
84         n  = ddesc->blk_count;
85
86         mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
87         /* round to 1 digit */
88         mb.rem *= 10 * ddesc->blk_size;
89         mb.rem += 512 * 1024;
90         mb.rem /= 1024 * 1024;
91
92         gb = ldiv(10 * mb.quot + mb.rem, 10240);
93         gb.rem += 512;
94         gb.rem /= 1024;
95
96
97         printf ("Block Size=%d, Number of Blocks=%d, "
98                 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
99                 "DeviceType=0x%x, DeviceId=0x%x\n\n"
100                 "   #:                 type name"
101                 "                   length   base       (size)\n",
102                 ddesc->blk_size,
103                 ddesc->blk_count,
104                 mb.quot, mb.rem, gb.quot, gb.rem,
105                 ddesc->dev_type, ddesc->dev_id
106                 );
107
108         n = 1;  /* assuming at least one partition */
109         for (i=1; i<=n; ++i) {
110                 ulong bytes;
111                 char c;
112
113                 printf ("%4ld: ", i);
114                 if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
115                         printf ("** Can't read Partition Map on %d:%ld **\n",
116                                 dev_desc->devnum, i);
117                         return;
118                 }
119
120                 if (mpart->signature != MAC_PARTITION_MAGIC) {
121                         printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
122                                dev_desc->devnum, i, MAC_PARTITION_MAGIC,
123                                mpart->signature);
124                         return;
125                 }
126
127                 /* update partition count */
128                 n = mpart->map_count;
129
130                 c      = 'k';
131                 bytes  = mpart->block_count;
132                 bytes /= (1024 / ddesc->blk_size);  /* kB; assumes blk_size == 512 */
133                 if (bytes >= 1024) {
134                         bytes >>= 10;
135                         c = 'M';
136                 }
137                 if (bytes >= 1024) {
138                         bytes >>= 10;
139                         c = 'G';
140                 }
141
142                 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
143                         mpart->type,
144                         mpart->name,
145                         mpart->block_count,
146                         mpart->start_block,
147                         bytes, c
148                         );
149         }
150
151         return;
152 }
153
154
155 /*
156  * Read Device Descriptor Block
157  */
158 static int part_mac_read_ddb(struct blk_desc *dev_desc,
159                              mac_driver_desc_t *ddb_p)
160 {
161         if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
162                 printf("** Can't read Driver Descriptor Block **\n");
163                 return (-1);
164         }
165
166         if (ddb_p->signature != MAC_DRIVER_MAGIC) {
167 #if 0
168                 printf ("** Bad Signature: expected 0x%04x, got 0x%04x\n",
169                         MAC_DRIVER_MAGIC, ddb_p->signature);
170 #endif
171                 return (-1);
172         }
173         return (0);
174 }
175
176 /*
177  * Read Partition Descriptor Block
178  */
179 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
180                              mac_partition_t *pdb_p)
181 {
182         int n = 1;
183
184         for (;;) {
185                 /*
186                  * We must always read the descritpor block for
187                  * partition 1 first since this is the only way to
188                  * know how many partitions we have.
189                  */
190                 if (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
191                         printf ("** Can't read Partition Map on %d:%d **\n",
192                                 dev_desc->devnum, n);
193                         return (-1);
194                 }
195
196                 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
197                         printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
198                                dev_desc->devnum, n, MAC_PARTITION_MAGIC,
199                                pdb_p->signature);
200                         return (-1);
201                 }
202
203                 if (n == part)
204                         return (0);
205
206                 if ((part < 1) || (part > pdb_p->map_count)) {
207                         printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
208                                 dev_desc->devnum, part,
209                                 dev_desc->devnum,
210                                 dev_desc->devnum, pdb_p->map_count);
211                         return (-1);
212                 }
213
214                 /* update partition count */
215                 n = part;
216         }
217
218         /* NOTREACHED */
219 }
220
221 static int part_get_info_mac(struct blk_desc *dev_desc, int part,
222                                   disk_partition_t *info)
223 {
224         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
225         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
226
227         if (part_mac_read_ddb (dev_desc, ddesc)) {
228                 return (-1);
229         }
230
231         info->blksz = ddesc->blk_size;
232
233         if (part_mac_read_pdb (dev_desc, part, mpart)) {
234                 return (-1);
235         }
236
237         info->start = mpart->start_block;
238         info->size  = mpart->block_count;
239         memcpy (info->type, mpart->type, sizeof(info->type));
240         memcpy (info->name, mpart->name, sizeof(info->name));
241
242         return (0);
243 }
244
245 U_BOOT_PART_TYPE(mac) = {
246         .name           = "MAC",
247         .part_type      = PART_TYPE_MAC,
248         .max_entries    = MAC_ENTRY_NUMBERS,
249         .get_info       = part_get_info_mac,
250         .print          = part_print_mac,
251         .test           = part_test_mac,
252 };
253 #endif