stm32f746-disco: enable flash support
[oweals/u-boot.git] / lib / gunzip.c
1 /*
2  * (C) Copyright 2000-2006
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <watchdog.h>
10 #include <command.h>
11 #include <console.h>
12 #include <image.h>
13 #include <malloc.h>
14 #include <u-boot/zlib.h>
15 #include <div64.h>
16
17 #define HEADER0                 '\x1f'
18 #define HEADER1                 '\x8b'
19 #define ZALLOC_ALIGNMENT        16
20 #define HEAD_CRC                2
21 #define EXTRA_FIELD             4
22 #define ORIG_NAME               8
23 #define COMMENT                 0x10
24 #define RESERVED                0xe0
25 #define DEFLATED                8
26
27 void *gzalloc(void *x, unsigned items, unsigned size)
28 {
29         void *p;
30
31         size *= items;
32         size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
33
34         p = malloc (size);
35
36         return (p);
37 }
38
39 void gzfree(void *x, void *addr, unsigned nb)
40 {
41         free (addr);
42 }
43
44 int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
45 {
46         int i, flags;
47
48         /* skip header */
49         i = 10;
50         flags = src[3];
51         if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
52                 puts ("Error: Bad gzipped data\n");
53                 return (-1);
54         }
55         if ((flags & EXTRA_FIELD) != 0)
56                 i = 12 + src[10] + (src[11] << 8);
57         if ((flags & ORIG_NAME) != 0)
58                 while (src[i++] != 0)
59                         ;
60         if ((flags & COMMENT) != 0)
61                 while (src[i++] != 0)
62                         ;
63         if ((flags & HEAD_CRC) != 0)
64                 i += 2;
65         if (i >= *lenp) {
66                 puts ("Error: gunzip out of data in header\n");
67                 return (-1);
68         }
69
70         return zunzip(dst, dstlen, src, lenp, 1, i);
71 }
72
73 #ifdef CONFIG_CMD_UNZIP
74 __weak
75 void gzwrite_progress_init(u64 expectedsize)
76 {
77         putc('\n');
78 }
79
80 __weak
81 void gzwrite_progress(int iteration,
82                      u64 bytes_written,
83                      u64 total_bytes)
84 {
85         if (0 == (iteration & 3))
86                 printf("%llu/%llu\r", bytes_written, total_bytes);
87 }
88
89 __weak
90 void gzwrite_progress_finish(int returnval,
91                              u64 bytes_written,
92                              u64 total_bytes,
93                              u32 expected_crc,
94                              u32 calculated_crc)
95 {
96         if (0 == returnval) {
97                 printf("\n\t%llu bytes, crc 0x%08x\n",
98                        total_bytes, calculated_crc);
99         } else {
100                 printf("\n\tuncompressed %llu of %llu\n"
101                        "\tcrcs == 0x%08x/0x%08x\n",
102                        bytes_written, total_bytes,
103                        expected_crc, calculated_crc);
104         }
105 }
106
107 int gzwrite(unsigned char *src, int len,
108             struct blk_desc *dev,
109             unsigned long szwritebuf,
110             u64 startoffs,
111             u64 szexpected)
112 {
113         int i, flags;
114         z_stream s;
115         int r = 0;
116         unsigned char *writebuf;
117         unsigned crc = 0;
118         u64 totalfilled = 0;
119         lbaint_t blksperbuf, outblock;
120         u32 expected_crc;
121         u32 payload_size;
122         int iteration = 0;
123
124         if (!szwritebuf ||
125             (szwritebuf % dev->blksz) ||
126             (szwritebuf < dev->blksz)) {
127                 printf("%s: size %lu not a multiple of %lu\n",
128                        __func__, szwritebuf, dev->blksz);
129                 return -1;
130         }
131
132         if (startoffs & (dev->blksz-1)) {
133                 printf("%s: start offset %llu not a multiple of %lu\n",
134                        __func__, startoffs, dev->blksz);
135                 return -1;
136         }
137
138         blksperbuf = szwritebuf / dev->blksz;
139         outblock = lldiv(startoffs, dev->blksz);
140
141         /* skip header */
142         i = 10;
143         flags = src[3];
144         if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
145                 puts("Error: Bad gzipped data\n");
146                 return -1;
147         }
148         if ((flags & EXTRA_FIELD) != 0)
149                 i = 12 + src[10] + (src[11] << 8);
150         if ((flags & ORIG_NAME) != 0)
151                 while (src[i++] != 0)
152                         ;
153         if ((flags & COMMENT) != 0)
154                 while (src[i++] != 0)
155                         ;
156         if ((flags & HEAD_CRC) != 0)
157                 i += 2;
158
159         if (i >= len-8) {
160                 puts("Error: gunzip out of data in header");
161                 return -1;
162         }
163
164         payload_size = len - i - 8;
165
166         memcpy(&expected_crc, src + len - 8, sizeof(expected_crc));
167         expected_crc = le32_to_cpu(expected_crc);
168         u32 szuncompressed;
169         memcpy(&szuncompressed, src + len - 4, sizeof(szuncompressed));
170         if (szexpected == 0) {
171                 szexpected = le32_to_cpu(szuncompressed);
172         } else if (szuncompressed != (u32)szexpected) {
173                 printf("size of %llx doesn't match trailer low bits %x\n",
174                        szexpected, szuncompressed);
175                 return -1;
176         }
177         if (lldiv(szexpected, dev->blksz) > (dev->lba - outblock)) {
178                 printf("%s: uncompressed size %llu exceeds device size\n",
179                        __func__, szexpected);
180                 return -1;
181         }
182
183         gzwrite_progress_init(szexpected);
184
185         s.zalloc = gzalloc;
186         s.zfree = gzfree;
187
188         r = inflateInit2(&s, -MAX_WBITS);
189         if (r != Z_OK) {
190                 printf("Error: inflateInit2() returned %d\n", r);
191                 return -1;
192         }
193
194         s.next_in = src + i;
195         s.avail_in = payload_size+8;
196         writebuf = (unsigned char *)malloc(szwritebuf);
197
198         /* decompress until deflate stream ends or end of file */
199         do {
200                 if (s.avail_in == 0) {
201                         printf("%s: weird termination with result %d\n",
202                                __func__, r);
203                         break;
204                 }
205
206                 /* run inflate() on input until output buffer not full */
207                 do {
208                         unsigned long blocks_written;
209                         int numfilled;
210                         lbaint_t writeblocks;
211
212                         s.avail_out = szwritebuf;
213                         s.next_out = writebuf;
214                         r = inflate(&s, Z_SYNC_FLUSH);
215                         if ((r != Z_OK) &&
216                             (r != Z_STREAM_END)) {
217                                 printf("Error: inflate() returned %d\n", r);
218                                 goto out;
219                         }
220                         numfilled = szwritebuf - s.avail_out;
221                         crc = crc32(crc, writebuf, numfilled);
222                         totalfilled += numfilled;
223                         if (numfilled < szwritebuf) {
224                                 writeblocks = (numfilled+dev->blksz-1)
225                                                 / dev->blksz;
226                                 memset(writebuf+numfilled, 0,
227                                        dev->blksz-(numfilled%dev->blksz));
228                         } else {
229                                 writeblocks = blksperbuf;
230                         }
231
232                         gzwrite_progress(iteration++,
233                                          totalfilled,
234                                          szexpected);
235                         blocks_written = dev->block_write(dev, outblock,
236                                                           writeblocks,
237                                                           writebuf);
238                         outblock += blocks_written;
239                         if (ctrlc()) {
240                                 puts("abort\n");
241                                 goto out;
242                         }
243                         WATCHDOG_RESET();
244                 } while (s.avail_out == 0);
245                 /* done when inflate() says it's done */
246         } while (r != Z_STREAM_END);
247
248         if ((szexpected != totalfilled) ||
249             (crc != expected_crc))
250                 r = -1;
251         else
252                 r = 0;
253
254 out:
255         gzwrite_progress_finish(r, totalfilled, szexpected,
256                                 expected_crc, crc);
257         free(writebuf);
258         inflateEnd(&s);
259
260         return r;
261 }
262 #endif
263
264 /*
265  * Uncompress blocks compressed with zlib without headers
266  */
267 int zunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp,
268                                                 int stoponerr, int offset)
269 {
270         z_stream s;
271         int err = 0;
272         int r;
273
274         s.zalloc = gzalloc;
275         s.zfree = gzfree;
276
277         r = inflateInit2(&s, -MAX_WBITS);
278         if (r != Z_OK) {
279                 printf("Error: inflateInit2() returned %d\n", r);
280                 return -1;
281         }
282         s.next_in = src + offset;
283         s.avail_in = *lenp - offset;
284         s.next_out = dst;
285         s.avail_out = dstlen;
286         do {
287                 r = inflate(&s, Z_FINISH);
288                 if (stoponerr == 1 && r != Z_STREAM_END &&
289                     (s.avail_in == 0 || s.avail_out == 0 || r != Z_BUF_ERROR)) {
290                         printf("Error: inflate() returned %d\n", r);
291                         err = -1;
292                         break;
293                 }
294         } while (r == Z_BUF_ERROR);
295         *lenp = s.next_out - (unsigned char *) dst;
296         inflateEnd(&s);
297
298         return err;
299 }