cmd_nand.c.l

嵌入式试验箱S3C2410的bootloader源代码

01 /*
02  * Driver for NAND support, Rick Bronson
03  * borrowed heavily from:
04  * (c) 1999 Machine Vision Holdings, Inc.
05  * (c) 1999, 2000 David Woodhouse <[e-mail]>
06  *
07  * Added 16-bit nand support
08  * (C) 2004 Texas Instruments
09  */
10 
11 #include <common.h>
12 
13 
14 #ifndef CFG_NAND_LEGACY
15 /*
16  *
17  * New NAND support
18  *
19  */
20 #include <common.h>
21 
22 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
23 
24 #include <command.h>
25 #include <watchdog.h>
26 #include <malloc.h>
27 #include <asm/byteorder.h>
28 
29 #ifdef CONFIG_SHOW_BOOT_PROGRESS
30 # include <status_led.h>
31 # define SHOW_BOOT_PROGRESS(arg)    show_boot_progress(arg)
32 #else
33 # define SHOW_BOOT_PROGRESS(arg)
34 #endif
35 
36 #include <jffs2/jffs2.h>
37 #include <nand.h>
38 
39 #if (CONFIG_COMMANDS & CFG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)
40 
41 /* parition handling routines */
42 int mtdparts_init(void);
43 int id_parse(const char *id, const char **ret_id, u8 *dev_type, u8 *dev_num);
44 int find_dev_and_part(const char *id, struct mtd_device **dev,
45         u8 *part_num, struct part_info **part);
46 #endif
47 
48 extern nand_info_t nand_info[];       /* info for NAND chips */
49 
50 static int nand_dump_oob(nand_info_t *nand, ulong off)
51 {
52     return 0;
53 }
54 
55 static int nand_dump(nand_info_t *nand, ulong off)
56 {
57     int i;
58     u_char *buf, *p;
59 
60     buf = malloc(nand->oobblock + nand->oobsize);
61     if (!buf) {
62         puts("No memory for page buffer\n");
63         return 1;
64     }
65     off &= ~(nand->oobblock - 1);
66     i = nand_read_raw(nand, buf, off, nand->oobblock, nand->oobsize);
67     if (i < 0) {
68         printf("Error (%d) reading page %08x\n", i, off);
69         free(buf);
70         return 1;
71     }
72     printf("Page %08x dump:\n", off);
73     i = nand->oobblock >> 4; p = buf;
74     while (i--) {
75         printf( "\t%02x %02x %02x %02x %02x %02x %02x %02x"
76             "  %02x %02x %02x %02x %02x %02x %02x %02x\n",
77             p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
78             p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
79         p += 16;
80     }
81     puts("OOB:\n");
82     i = nand->oobsize >> 3;
83     while (i--) {
84         printf( "\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
85             p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
86         p += 8;
87     }
88     free(buf);
89 
90     return 0;
91 }
92 
93 /* ------------------------------------------------------------------------- */
94 
95 static inline int str2long(char *p, ulong *num)
96 {
97     char *endptr;
98 
99     *num = simple_strtoul(p, &endptr, 16);
100     return (*p != '\0' && *endptr == '\0') ? 1 : 0;
101 }
102 
103 static int
104 arg_off_size(int argc, char *argv[], nand_info_t *nand, ulong *off, ulong *size)
105 {
106     int idx = nand_curr_device;
107 #if (CONFIG_COMMANDS & CFG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)
108     struct mtd_device *dev;
109     struct part_info *part;
110     u8 pnum;
111 
112     if (argc >= 1 && !(str2long(argv[0], off))) {
113         if ((mtdparts_init() == 0) &&
114             (find_dev_and_part(argv[0], &dev, &pnum, &part) == 0)) {
115             if (dev->id->type != MTD_DEV_TYPE_NAND) {
116                 puts("not a NAND device\n");
117                 return -1;
118             }
119             *off = part->offset;
120             if (argc >= 2) {
121                 if (!(str2long(argv[1], size))) {
122                     printf("'%s' is not a number\n", argv[1]);
123                     return -1;
124                 }
125                 if (*size > part->size)
126                     *size = part->size;
127             } else {
128                 *size = part->size;
129             }
130             idx = dev->id->num;
131             *nand = nand_info[idx];
132             goto out;
133         }
134     }
135 #endif
136 
137     if (argc >= 1) {
138         if (!(str2long(argv[0], off))) {
139             printf("'%s' is not a number\n", argv[0]);
140             return -1;
141         }
142     } else {
143         *off = 0;
144     }
145 
146     if (argc >= 2) {
147         if (!(str2long(argv[1], size))) {
148             printf("'%s' is not a number\n", argv[1]);
149             return -1;
150         }
151     } else {
152         *size = nand->size - *off;
153     }
154 
155 #if (CONFIG_COMMANDS & CFG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)
156 out:
157 #endif
158     printf("device %d ", idx);
159     if (*size == nand->size)
160         puts("whole chip\n");
161     else
162         printf("offset 0x%x, size 0x%x\n", *off, *size);
163     return 0;
164 }
165 
166 int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
167 {
168     int i, dev, ret;
169     ulong addr, off, size;
170     char *cmd, *s;
171     nand_info_t *nand;
172     int quiet = 0;
173     const char *quiet_str = getenv("quiet");
174 
175     /* at least two arguments please */
176     if (argc < 2)
177         goto usage;
178 
179     if (quiet_str)
180         quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
181 
182     cmd = argv[1];
183 
184     if (strcmp(cmd, "info") == 0) {
185 
186         putc('\n');
187         for (i = 0; i < CFG_MAX_NAND_DEVICE; i++) {
188             if (nand_info[i].name)
189                 printf("Device %d: %s, sector size %lu KiB\n",
190                     i, nand_info[i].name,
191                     nand_info[i].erasesize >> 10);
192         }
193         return 0;
194     }
195 
196     if (strcmp(cmd, "device") == 0) {
197 
198         if (argc < 3) {
199             if ((nand_curr_device < 0) ||
200                 (nand_curr_device >= CFG_MAX_NAND_DEVICE))
201                 puts("\nno devices available\n");
202             else
203                 printf("\nDevice %d: %s\n", nand_curr_device,
204                     nand_info[nand_curr_device].name);
205             return 0;
206         }
207         dev = (int)simple_strtoul(argv[2], NULL, 10);
208         if (dev < 0 || dev >= CFG_MAX_NAND_DEVICE || !nand_info[dev].name) {
209             puts("No such device\n");
210             return 1;
211         }
212         printf("Device %d: %s", dev, nand_info[dev].name);
213         puts("... is now current device\n");
214         nand_curr_device = dev;
215 
216 #ifdef CFG_NAND_SELECT_DEVICE
217         /*
218          * Select the chip in the board/cpu specific driver
219          */
220         board_nand_select_device(nand_info[dev].priv, dev);
221 #endif
222 
223         return 0;
224     }
225 
226     if (strcmp(cmd, "bad") != 0 && strcmp(cmd, "erase") != 0 &&
227         strncmp(cmd, "dump", 4) != 0 &&
228         strncmp(cmd, "read", 4) != 0 && strncmp(cmd, "write", 5) != 0 &&
229         strcmp(cmd, "scrub") != 0 && strcmp(cmd, "markbad") != 0 &&
230         strcmp(cmd, "biterr") != 0 &&
231         strcmp(cmd, "lock") != 0 && strcmp(cmd, "unlock") != 0 )
232         goto usage;
233 
234     /* the following commands operate on the current device */
235     if (nand_curr_device < 0 || nand_curr_device >= CFG_MAX_NAND_DEVICE ||
236         !nand_info[nand_curr_device].name) {
237         puts("\nno devices available\n");
238         return 1;
239     }
240     nand = &nand_info[nand_curr_device];
241 
242     if (strcmp(cmd, "bad") == 0) {
243         printf("\nDevice %d bad blocks:\n", nand_curr_device);
244         for (off = 0; off < nand->size; off += nand->erasesize)
245             if (nand_block_isbad(nand, off))
246                 printf("  %08x\n", off);
247         return 0;
248     }
249 
250     /*
251      * Syntax is:
252      *   0    1     2       3    4
253      *   nand erase [clean] [off size]
254      */
255     if (strcmp(cmd, "erase") == 0 || strcmp(cmd, "scrub") == 0) {
256         nand_erase_options_t opts;
257         /* "clean" at index 2 means request to write cleanmarker */
258         int clean = argc > 2 && !strcmp("clean", argv[2]);
259         int o = clean ? 3 : 2;
260         int scrub = !strcmp(cmd, "scrub");
261 
262         printf("\nNAND %s: ", scrub ? "scrub" : "erase");
263         /* skip first two or three arguments, look for offset and size */
264         if (arg_off_size(argc - o, argv + o, nand, &off, &size) != 0)
265             return 1;
266 
267         memset(&opts, 0, sizeof(opts));
268         opts.offset = off;
269         opts.length = size;
270         opts.jffs2  = clean;
271         opts.quiet  = quiet;
272 
273         if (scrub) {
274             puts("Warning: "
275                  "scrub option will erase all factory set "
276                  "bad blocks!\n"
277                  "         "
278                  "There is no reliable way to recover them.\n"
279                  "         "
280                  "Use this command only for testing purposes "
281                  "if you\n"
282                  "         "
283                  "are sure of what you are doing!\n"
284                  "\nReally scrub this NAND flash? <y/N>\n");
285 
286             if (getc() == 'y' && getc() == '\r') {
287                 opts.scrub = 1;
288             } else {
289                 puts("scrub aborted\n");
290                 return -1;
291             }
292         }
293         ret = nand_erase_opts(nand, &opts);
294         printf("%s\n", ret ? "ERROR" : "OK");
295 
296         return ret == 0 ? 0 : 1;
297     }
298 
299     if (strncmp(cmd, "dump", 4) == 0) {
300         if (argc < 3)
301             goto usage;
302 
303         s = strchr(cmd, '.');
304         off = (int)simple_strtoul(argv[2], NULL, 16);
305 
306         if (s != NULL && strcmp(s, ".oob") == 0)
307             ret = nand_dump_oob(nand, off);
308         else
309             ret = nand_dump(nand, off);
310 
311         return ret == 0 ? 1 : 0;
312 
313     }
314 
315     /* read write */
316     if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
317         int read;
318 
319         if (argc < 4)
320             goto usage;
321 
322         addr = (ulong)simple_strtoul(argv[2], NULL, 16);
323 
324         read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
325         printf("\nNAND %s: ", read ? "read" : "write");
326         if (arg_off_size(argc - 3, argv + 3, nand, &off, &size) != 0)
327             return 1;
328 
329         s = strchr(cmd, '.');
330         if (s != NULL &&
331             (!strcmp(s, ".jffs2") || !strcmp(s, ".e") || !strcmp(s, ".i"))) {
332             if (read) {
333                 /* read */
334                 nand_read_options_t opts;
335                 memset(&opts, 0, sizeof(opts));
336                 opts.buffer = (u_char*) addr;
337                 opts.length = size;
338                 opts.offset = off;
339                 opts.quiet      = quiet;