arm: mvebu: drivers/ddr: remove redundant assignment
[oweals/u-boot.git] / disk / part_mac.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2000
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  */
6
7 /*
8  * Support for harddisk partitions.
9  *
10  * To be compatible with LinuxPPC and Apple we use the standard Apple
11  * SCSI disk partitioning scheme. For more information see:
12  * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
13  */
14
15 #include <common.h>
16 #include <command.h>
17 #include <memalign.h>
18 #include <ide.h>
19 #include "part_mac.h"
20
21 #ifdef CONFIG_HAVE_BLOCK_DEVICE
22
23 /* stdlib.h causes some compatibility problems; should fixe these! -- wd */
24 #ifndef __ldiv_t_defined
25 typedef struct {
26         long int quot;          /* Quotient     */
27         long int rem;           /* Remainder    */
28 } ldiv_t;
29 extern ldiv_t ldiv (long int __numer, long int __denom);
30 # define __ldiv_t_defined       1
31 #endif
32
33
34 static int part_mac_read_ddb(struct blk_desc *dev_desc,
35                              mac_driver_desc_t *ddb_p);
36 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
37                              mac_partition_t *pdb_p);
38
39 /*
40  * Test for a valid MAC partition
41  */
42 static int part_test_mac(struct blk_desc *dev_desc)
43 {
44         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
45         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
46         ulong i, n;
47
48         if (part_mac_read_ddb (dev_desc, ddesc)) {
49                 /*
50                  * error reading Driver Descriptor Block,
51                  * or no valid Signature
52                  */
53                 return (-1);
54         }
55
56         n = 1;  /* assuming at least one partition */
57         for (i=1; i<=n; ++i) {
58                 if ((blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) ||
59                     (mpart->signature != MAC_PARTITION_MAGIC) ) {
60                         return (-1);
61                 }
62                 /* update partition count */
63                 n = mpart->map_count;
64         }
65         return (0);
66 }
67
68 static void part_print_mac(struct blk_desc *dev_desc)
69 {
70         ulong i, n;
71         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
72         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
73         ldiv_t mb, gb;
74
75         if (part_mac_read_ddb (dev_desc, ddesc)) {
76                 /*
77                  * error reading Driver Descriptor Block,
78                  * or no valid Signature
79                  */
80                 return;
81         }
82
83         n  = ddesc->blk_count;
84
85         mb = ldiv(n, ((1024 * 1024) / ddesc->blk_size)); /* MB */
86         /* round to 1 digit */
87         mb.rem *= 10 * ddesc->blk_size;
88         mb.rem += 512 * 1024;
89         mb.rem /= 1024 * 1024;
90
91         gb = ldiv(10 * mb.quot + mb.rem, 10240);
92         gb.rem += 512;
93         gb.rem /= 1024;
94
95
96         printf ("Block Size=%d, Number of Blocks=%d, "
97                 "Total Capacity: %ld.%ld MB = %ld.%ld GB\n"
98                 "DeviceType=0x%x, DeviceId=0x%x\n\n"
99                 "   #:                 type name"
100                 "                   length   base       (size)\n",
101                 ddesc->blk_size,
102                 ddesc->blk_count,
103                 mb.quot, mb.rem, gb.quot, gb.rem,
104                 ddesc->dev_type, ddesc->dev_id
105                 );
106
107         n = 1;  /* assuming at least one partition */
108         for (i=1; i<=n; ++i) {
109                 ulong bytes;
110                 char c;
111
112                 printf ("%4ld: ", i);
113                 if (blk_dread(dev_desc, i, 1, (ulong *)mpart) != 1) {
114                         printf ("** Can't read Partition Map on %d:%ld **\n",
115                                 dev_desc->devnum, i);
116                         return;
117                 }
118
119                 if (mpart->signature != MAC_PARTITION_MAGIC) {
120                         printf("** Bad Signature on %d:%ld - expected 0x%04x, got 0x%04x\n",
121                                dev_desc->devnum, i, MAC_PARTITION_MAGIC,
122                                mpart->signature);
123                         return;
124                 }
125
126                 /* update partition count */
127                 n = mpart->map_count;
128
129                 c      = 'k';
130                 bytes  = mpart->block_count;
131                 bytes /= (1024 / ddesc->blk_size);  /* kB; assumes blk_size == 512 */
132                 if (bytes >= 1024) {
133                         bytes >>= 10;
134                         c = 'M';
135                 }
136                 if (bytes >= 1024) {
137                         bytes >>= 10;
138                         c = 'G';
139                 }
140
141                 printf ("%20.32s %-18.32s %10u @ %-10u (%3ld%c)\n",
142                         mpart->type,
143                         mpart->name,
144                         mpart->block_count,
145                         mpart->start_block,
146                         bytes, c
147                         );
148         }
149
150         return;
151 }
152
153
154 /*
155  * Read Device Descriptor Block
156  */
157 static int part_mac_read_ddb(struct blk_desc *dev_desc,
158                              mac_driver_desc_t *ddb_p)
159 {
160         if (blk_dread(dev_desc, 0, 1, (ulong *)ddb_p) != 1) {
161                 debug("** Can't read Driver Descriptor Block **\n");
162                 return (-1);
163         }
164
165         if (ddb_p->signature != MAC_DRIVER_MAGIC) {
166                 return (-1);
167         }
168         return (0);
169 }
170
171 /*
172  * Read Partition Descriptor Block
173  */
174 static int part_mac_read_pdb(struct blk_desc *dev_desc, int part,
175                              mac_partition_t *pdb_p)
176 {
177         int n = 1;
178
179         for (;;) {
180                 /*
181                  * We must always read the descritpor block for
182                  * partition 1 first since this is the only way to
183                  * know how many partitions we have.
184                  */
185                 if (blk_dread(dev_desc, n, 1, (ulong *)pdb_p) != 1) {
186                         printf ("** Can't read Partition Map on %d:%d **\n",
187                                 dev_desc->devnum, n);
188                         return (-1);
189                 }
190
191                 if (pdb_p->signature != MAC_PARTITION_MAGIC) {
192                         printf("** Bad Signature on %d:%d: expected 0x%04x, got 0x%04x\n",
193                                dev_desc->devnum, n, MAC_PARTITION_MAGIC,
194                                pdb_p->signature);
195                         return (-1);
196                 }
197
198                 if (n == part)
199                         return (0);
200
201                 if ((part < 1) || (part > pdb_p->map_count)) {
202                         printf ("** Invalid partition %d:%d [%d:1...%d:%d only]\n",
203                                 dev_desc->devnum, part,
204                                 dev_desc->devnum,
205                                 dev_desc->devnum, pdb_p->map_count);
206                         return (-1);
207                 }
208
209                 /* update partition count */
210                 n = part;
211         }
212
213         /* NOTREACHED */
214 }
215
216 static int part_get_info_mac(struct blk_desc *dev_desc, int part,
217                                   disk_partition_t *info)
218 {
219         ALLOC_CACHE_ALIGN_BUFFER(mac_driver_desc_t, ddesc, 1);
220         ALLOC_CACHE_ALIGN_BUFFER(mac_partition_t, mpart, 1);
221
222         if (part_mac_read_ddb (dev_desc, ddesc)) {
223                 return (-1);
224         }
225
226         info->blksz = ddesc->blk_size;
227
228         if (part_mac_read_pdb (dev_desc, part, mpart)) {
229                 return (-1);
230         }
231
232         info->start = mpart->start_block;
233         info->size  = mpart->block_count;
234         memcpy (info->type, mpart->type, sizeof(info->type));
235         memcpy (info->name, mpart->name, sizeof(info->name));
236
237         return (0);
238 }
239
240 U_BOOT_PART_TYPE(mac) = {
241         .name           = "MAC",
242         .part_type      = PART_TYPE_MAC,
243         .max_entries    = MAC_ENTRY_NUMBERS,
244         .get_info       = part_get_info_mac,
245         .print          = part_print_mac,
246         .test           = part_test_mac,
247 };
248 #endif