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[people/ms/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 /* 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