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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
wdenkc7de8292002-11-19 11:04:11 +00002/*
3 * (C) Copyright 2001
wdenk8bde7f72003-06-27 21:31:46 +00004 * Hans-Joerg Frieden, Hyperion Entertainment
wdenkc7de8292002-11-19 11:04:11 +00005 * Hans-JoergF@hyperion-entertainment.com
wdenkc7de8292002-11-19 11:04:11 +00006 */
7#include <common.h>
8#include <command.h>
Simon Glass7b51b572019-08-01 09:46:52 -06009#include <env.h>
wdenkc7de8292002-11-19 11:04:11 +000010#include <ide.h>
wdenkc7de8292002-11-19 11:04:11 +000011#include "part_amiga.h"
Simon Glasse6f6f9e2020-05-10 11:39:58 -060012#include <part.h>
wdenkc7de8292002-11-19 11:04:11 +000013
wdenkc7de8292002-11-19 11:04:11 +000014#undef AMIGA_DEBUG
15
16#ifdef AMIGA_DEBUG
17#define PRINTF(fmt, args...) printf(fmt ,##args)
18#else
19#define PRINTF(fmt, args...)
20#endif
21
22struct block_header
23{
24 u32 id;
25 u32 summed_longs;
26 s32 chk_sum;
27};
28
29static unsigned char block_buffer[DEFAULT_SECTOR_SIZE];
30static struct rigid_disk_block rdb = {0};
31static struct bootcode_block bootcode = {0};
32
33/*
34 * Copy a bcpl to a c string
35 */
36static void bcpl_strcpy(char *to, char *from)
37{
38 int len = *from++;
39
40 while (len)
41 {
42 *to++ = *from++;
43 len--;
44 }
45 *to = 0;
46}
47
48/*
49 * Print a BCPL String. BCPL strings start with a byte with the length
50 * of the string, and don't contain a terminating nul character
51 */
52static void bstr_print(char *string)
53{
54 int len = *string++;
55 char buffer[256];
56 int i;
wdenk8bde7f72003-06-27 21:31:46 +000057
wdenkc7de8292002-11-19 11:04:11 +000058 i = 0;
59 while (len)
60 {
61 buffer[i++] = *string++;
62 len--;
63 }
64
65 buffer[i] = 0;
66 printf("%-10s", buffer);
67}
68
69/*
70 * Sum a block. The checksum of a block must end up at zero
71 * to be valid. The chk_sum field is selected so that adding
72 * it yields zero.
73 */
74int sum_block(struct block_header *header)
75{
76 s32 *block = (s32 *)header;
77 u32 i;
78 s32 sum = 0;
79
80 for (i = 0; i < header->summed_longs; i++)
81 sum += *block++;
wdenk8bde7f72003-06-27 21:31:46 +000082
wdenkc7de8292002-11-19 11:04:11 +000083 return (sum != 0);
84}
85
86/*
87 * Print an AmigaOS disk type. Disk types are a four-byte identifier
88 * describing the file system. They are usually written as a three-letter
89 * word followed by a backslash and a version number. For example,
90 * DOS\0 would be the original file system. SFS\0 would be SmartFileSystem.
91 * DOS\1 is FFS.
92 */
93static void print_disk_type(u32 disk_type)
94{
95 char buffer[6];
96 buffer[0] = (disk_type & 0xFF000000)>>24;
97 buffer[1] = (disk_type & 0x00FF0000)>>16;
98 buffer[2] = (disk_type & 0x0000FF00)>>8;
99 buffer[3] = '\\';
100 buffer[4] = (disk_type & 0x000000FF) + '0';
101 buffer[5] = 0;
102 printf("%s", buffer);
103}
104
105/*
106 * Print the info contained within the given partition block
107 */
108static void print_part_info(struct partition_block *p)
109{
110 struct amiga_part_geometry *g;
wdenk8bde7f72003-06-27 21:31:46 +0000111
wdenkc7de8292002-11-19 11:04:11 +0000112 g = (struct amiga_part_geometry *)&(p->environment);
113
114 bstr_print(p->drive_name);
wdenk8bde7f72003-06-27 21:31:46 +0000115 printf("%6d\t%6d\t",
116 g->low_cyl * g->block_per_track * g->surfaces ,
wdenkc7de8292002-11-19 11:04:11 +0000117 (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1);
118 print_disk_type(g->dos_type);
119 printf("\t%5d\n", g->boot_priority);
120}
121
122/*
123 * Search for the Rigid Disk Block. The rigid disk block is required
124 * to be within the first 16 blocks of a drive, needs to have
125 * the ID AMIGA_ID_RDISK ('RDSK') and needs to have a valid
126 * sum-to-zero checksum
127 */
Simon Glass4101f682016-02-29 15:25:34 -0700128struct rigid_disk_block *get_rdisk(struct blk_desc *dev_desc)
wdenkc7de8292002-11-19 11:04:11 +0000129{
130 int i;
131 int limit;
132 char *s;
133
Simon Glass00caae62017-08-03 12:22:12 -0600134 s = env_get("amiga_scanlimit");
wdenkc7de8292002-11-19 11:04:11 +0000135 if (s)
Simon Glass0b1284e2021-07-24 09:03:30 -0600136 limit = dectoul(s, NULL);
wdenkc7de8292002-11-19 11:04:11 +0000137 else
138 limit = AMIGA_BLOCK_LIMIT;
139
140 for (i=0; i<limit; i++)
141 {
Simon Glass2a981dc2016-02-29 15:25:52 -0700142 ulong res = blk_dread(dev_desc, i, 1, (ulong *)block_buffer);
wdenkc7de8292002-11-19 11:04:11 +0000143 if (res == 1)
144 {
145 struct rigid_disk_block *trdb = (struct rigid_disk_block *)block_buffer;
146 if (trdb->id == AMIGA_ID_RDISK)
147 {
148 PRINTF("Rigid disk block suspect at %d, checking checksum\n",i);
149 if (sum_block((struct block_header *)block_buffer) == 0)
150 {
151 PRINTF("FOUND\n");
152 memcpy(&rdb, trdb, sizeof(struct rigid_disk_block));
153 return (struct rigid_disk_block *)&rdb;
154 }
155 }
156 }
157 }
158 PRINTF("Done scanning, no RDB found\n");
159 return NULL;
160}
161
wdenk8bde7f72003-06-27 21:31:46 +0000162/*
wdenkc7de8292002-11-19 11:04:11 +0000163 * Search for boot code
164 * Again, the first boot block must be located somewhere in the first 16 blocks, or rooted in the
165 * Ridgid disk block
166 */
167
Simon Glass4101f682016-02-29 15:25:34 -0700168struct bootcode_block *get_bootcode(struct blk_desc *dev_desc)
wdenkc7de8292002-11-19 11:04:11 +0000169{
170 int i;
171 int limit;
172 char *s;
173
Simon Glass00caae62017-08-03 12:22:12 -0600174 s = env_get("amiga_scanlimit");
wdenkc7de8292002-11-19 11:04:11 +0000175 if (s)
Simon Glass0b1284e2021-07-24 09:03:30 -0600176 limit = dectoul(s, NULL);
wdenkc7de8292002-11-19 11:04:11 +0000177 else
178 limit = AMIGA_BLOCK_LIMIT;
179
180 PRINTF("Scanning for BOOT from 0 to %d\n", limit);
181
182 for (i = 0; i < limit; i++)
183 {
Simon Glass2a981dc2016-02-29 15:25:52 -0700184 ulong res = blk_dread(dev_desc, i, 1, (ulong *)block_buffer);
wdenkc7de8292002-11-19 11:04:11 +0000185 if (res == 1)
186 {
187 struct bootcode_block *boot = (struct bootcode_block *)block_buffer;
188 if (boot->id == AMIGA_ID_BOOT)
189 {
190 PRINTF("BOOT block at %d, checking checksum\n", i);
191 if (sum_block((struct block_header *)block_buffer) == 0)
192 {
193 PRINTF("Found valid bootcode block\n");
194 memcpy(&bootcode, boot, sizeof(struct bootcode_block));
195 return &bootcode;
196 }
197 }
198 }
199 }
200
201 PRINTF("No boot code found on disk\n");
202 return 0;
203}
204
wdenk8bde7f72003-06-27 21:31:46 +0000205/*
wdenkc7de8292002-11-19 11:04:11 +0000206 * Test if the given partition has an Amiga partition table/Rigid
207 * Disk block
208 */
Simon Glass084bf4c2016-02-29 15:26:04 -0700209static int part_test_amiga(struct blk_desc *dev_desc)
wdenkc7de8292002-11-19 11:04:11 +0000210{
211 struct rigid_disk_block *rdb;
212 struct bootcode_block *bootcode;
213
Simon Glass084bf4c2016-02-29 15:26:04 -0700214 PRINTF("part_test_amiga: Testing for an Amiga RDB partition\n");
wdenk8bde7f72003-06-27 21:31:46 +0000215
wdenkc7de8292002-11-19 11:04:11 +0000216 rdb = get_rdisk(dev_desc);
217 if (rdb)
218 {
219 bootcode = get_bootcode(dev_desc);
220 if (bootcode)
Simon Glass084bf4c2016-02-29 15:26:04 -0700221 PRINTF("part_test_amiga: bootable Amiga disk\n");
wdenkc7de8292002-11-19 11:04:11 +0000222 else
Simon Glass084bf4c2016-02-29 15:26:04 -0700223 PRINTF("part_test_amiga: non-bootable Amiga disk\n");
wdenkc7de8292002-11-19 11:04:11 +0000224
225 return 0;
226 }
wdenk8bde7f72003-06-27 21:31:46 +0000227 else
wdenkc7de8292002-11-19 11:04:11 +0000228 {
Simon Glass084bf4c2016-02-29 15:26:04 -0700229 PRINTF("part_test_amiga: no RDB found\n");
wdenkc7de8292002-11-19 11:04:11 +0000230 return -1;
231 }
232
233}
234
wdenk8bde7f72003-06-27 21:31:46 +0000235/*
wdenkc7de8292002-11-19 11:04:11 +0000236 * Find partition number partnum on the given drive.
237 */
Simon Glass4101f682016-02-29 15:25:34 -0700238static struct partition_block *find_partition(struct blk_desc *dev_desc,
239 int partnum)
wdenkc7de8292002-11-19 11:04:11 +0000240{
241 struct rigid_disk_block *rdb;
242 struct partition_block *p;
243 u32 block;
244
245 PRINTF("Trying to find partition block %d\n", partnum);
246 rdb = get_rdisk(dev_desc);
wdenk8bde7f72003-06-27 21:31:46 +0000247 if (!rdb)
wdenkc7de8292002-11-19 11:04:11 +0000248 {
249 PRINTF("find_partition: no rdb found\n");
250 return NULL;
251 }
wdenk8bde7f72003-06-27 21:31:46 +0000252
wdenkc7de8292002-11-19 11:04:11 +0000253 PRINTF("find_partition: Scanning partition list\n");
254
255 block = rdb->partition_list;
256 PRINTF("find_partition: partition list at 0x%x\n", block);
257
258 while (block != 0xFFFFFFFF)
259 {
Simon Glass2a981dc2016-02-29 15:25:52 -0700260 ulong res = blk_dread(dev_desc, block, 1, (ulong *)block_buffer);
wdenkc7de8292002-11-19 11:04:11 +0000261 if (res == 1)
262 {
263 p = (struct partition_block *)block_buffer;
264 if (p->id == AMIGA_ID_PART)
265 {
266 PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
267 if (sum_block((struct block_header *)p) == 0)
268 {
269 if (partnum == 0) break;
wdenk8bde7f72003-06-27 21:31:46 +0000270 else
wdenkc7de8292002-11-19 11:04:11 +0000271 {
272 partnum--;
273 block = p->next;
274 }
275 }
276 } else block = 0xFFFFFFFF;
277 } else block = 0xFFFFFFFF;
278 }
279
wdenk8bde7f72003-06-27 21:31:46 +0000280 if (block == 0xFFFFFFFF)
wdenkc7de8292002-11-19 11:04:11 +0000281 {
282 PRINTF("PART block not found\n");
283 return NULL;
284 }
285
286 return (struct partition_block *)block_buffer;
287}
288
wdenk8bde7f72003-06-27 21:31:46 +0000289/*
wdenkc7de8292002-11-19 11:04:11 +0000290 * Get info about a partition
291 */
Simon Glass3e8bd462016-02-29 15:25:48 -0700292static int part_get_info_amiga(struct blk_desc *dev_desc, int part,
Simon Glass05289792020-05-10 11:39:57 -0600293 struct disk_partition *info)
wdenkc7de8292002-11-19 11:04:11 +0000294{
295 struct partition_block *p = find_partition(dev_desc, part-1);
296 struct amiga_part_geometry *g;
297 u32 disk_type;
298
299 if (!p) return -1;
300
301 g = (struct amiga_part_geometry *)&(p->environment);
302 info->start = g->low_cyl * g->block_per_track * g->surfaces;
303 info->size = (g->high_cyl - g->low_cyl + 1) * g->block_per_track * g->surfaces - 1;
304 info->blksz = rdb.block_bytes;
Simon Glass95a6f9d2016-02-29 15:25:45 -0700305 bcpl_strcpy((char *)info->name, p->drive_name);
wdenk8bde7f72003-06-27 21:31:46 +0000306
wdenkc7de8292002-11-19 11:04:11 +0000307
308 disk_type = g->dos_type;
309
310 info->type[0] = (disk_type & 0xFF000000)>>24;
311 info->type[1] = (disk_type & 0x00FF0000)>>16;
312 info->type[2] = (disk_type & 0x0000FF00)>>8;
313 info->type[3] = '\\';
314 info->type[4] = (disk_type & 0x000000FF) + '0';
315 info->type[5] = 0;
wdenk8bde7f72003-06-27 21:31:46 +0000316
wdenkc7de8292002-11-19 11:04:11 +0000317 return 0;
318}
319
Simon Glass084bf4c2016-02-29 15:26:04 -0700320static void part_print_amiga(struct blk_desc *dev_desc)
wdenk8bde7f72003-06-27 21:31:46 +0000321{
wdenkc7de8292002-11-19 11:04:11 +0000322 struct rigid_disk_block *rdb;
323 struct bootcode_block *boot;
324 struct partition_block *p;
325 u32 block;
326 int i = 1;
327
328 rdb = get_rdisk(dev_desc);
wdenk8bde7f72003-06-27 21:31:46 +0000329 if (!rdb)
wdenkc7de8292002-11-19 11:04:11 +0000330 {
Simon Glass084bf4c2016-02-29 15:26:04 -0700331 PRINTF("part_print_amiga: no rdb found\n");
wdenkc7de8292002-11-19 11:04:11 +0000332 return;
333 }
wdenk8bde7f72003-06-27 21:31:46 +0000334
Simon Glass084bf4c2016-02-29 15:26:04 -0700335 PRINTF("part_print_amiga: Scanning partition list\n");
wdenkc7de8292002-11-19 11:04:11 +0000336
337 block = rdb->partition_list;
Simon Glass084bf4c2016-02-29 15:26:04 -0700338 PRINTF("part_print_amiga: partition list at 0x%x\n", block);
wdenkc7de8292002-11-19 11:04:11 +0000339
340 printf("Summary: DiskBlockSize: %d\n"
341 " Cylinders : %d\n"
342 " Sectors/Track: %d\n"
343 " Heads : %d\n\n",
344 rdb->block_bytes, rdb->cylinders, rdb->sectors,
345 rdb->heads);
346
347 printf(" First Num. \n"
348 "Nr. Part. Name Block Block Type Boot Priority\n");
349
350 while (block != 0xFFFFFFFF)
351 {
352 ulong res;
353
354 PRINTF("Trying to load block #0x%X\n", block);
wdenk8bde7f72003-06-27 21:31:46 +0000355
Simon Glass2a981dc2016-02-29 15:25:52 -0700356 res = blk_dread(dev_desc, block, 1, (ulong *)block_buffer);
wdenkc7de8292002-11-19 11:04:11 +0000357 if (res == 1)
358 {
359 p = (struct partition_block *)block_buffer;
360 if (p->id == AMIGA_ID_PART)
361 {
362 PRINTF("PART block suspect at 0x%x, checking checksum\n",block);
363 if (sum_block((struct block_header *)p) == 0)
364 {
365 printf("%-4d ", i); i++;
366 print_part_info(p);
367 block = p->next;
368 }
369 } else block = 0xFFFFFFFF;
370 } else block = 0xFFFFFFFF;
371 }
372
373 boot = get_bootcode(dev_desc);
374 if (boot)
375 {
376 printf("Disk is bootable\n");
377 }
378}
379
Simon Glass96e5b032016-02-29 15:25:47 -0700380U_BOOT_PART_TYPE(amiga) = {
381 .name = "AMIGA",
382 .part_type = PART_TYPE_AMIGA,
Petr Kulhavy87b85302016-09-09 10:27:15 +0200383 .max_entries = AMIGA_ENTRY_NUMBERS,
Simon Glass3e8bd462016-02-29 15:25:48 -0700384 .get_info = part_get_info_amiga,
Simon Glass084bf4c2016-02-29 15:26:04 -0700385 .print = part_print_amiga,
386 .test = part_test_amiga,
Simon Glass96e5b032016-02-29 15:25:47 -0700387};