flashimage.c

基于xscale的远程更新nandflash设备

	for (i = 0; i < MAX_MTD_DEVICES; i++) {
		ptable[i].size = 0;
		ptable[i].erasesize = 0;
	}

	if ((fp = fopen("/proc/mtd", "r")) == NULL ) {
		fprintf(stderr, "=== WARNING: No mtd devices found. MTD operation disabled.\n");
		return -1;
	} else {
		if (!quiet) {
			fprintf(stderr, "The contents of file /proc/mtd are:\n");
			fprintf(stderr, "dev:     size     erasesize  name            (devfile)\n");
			fprintf(stderr, "-------------------------------------------------------\n");
        }
		while (fgets(line, sizeof(line), fp)) {
			if ( sscanf(line, "mtd%d:", &n)) {
				p=strrchr(line,'"'); *p = 0;
				p=strchr(line, '"');  p++;
				strcpy(ptable[n].name, p);
				sprintf(ptable[n].mtd, "mtd%d", n);

				sscanf(line,"%s %x %x %s\n", dev, &kk, &qq, name);
				p=strchr(dev,':'); *p=0;
				strcpy(ptable[n].mtd, dev);
				ptable[n].size = kk ;
				ptable[n].erasesize = qq;
				// fprintf(stderr, "%s, %x, %x, %s\n", dev, kk, qq, name);
				
				snprintf(devfile, sizeof(devfile), "/dev/mtd/%d", n);
				if (( ret = open(devfile, O_RDWR | O_SYNC)) < 0 ) {
				       snprintf(devfile, sizeof(devfile), "/dev/mtd%d", n << 1);
				} else {
			 		close(ret);
				}
				strcpy(ptable[n].devfile, devfile);
				if (!quiet)		
					fprintf(stderr, "%s: 0x%08X 0x%08X  %-15s %-15s\n", ptable[n].mtd, ptable[n].size,
							ptable[n].erasesize, ptable[n].name, ptable[n].devfile);
			}
			n++;
		}
		if (!quiet)
			fprintf(stderr, "\n");
		fclose(fp);
	}
	return 0;
}


int get_proc_mtdno(const char *name)
{
	int i;

	for (i = 0; ptable[i].size > 0 ; i++) {
		if (( strncmp(ptable[i].name, name, MAX_NAME_LEN) == 0) ||
				( strcmp( ptable[i].mtd, name) == 0))
			return i ;
	}
	return (-1);
}

	
					  


/****************************************/

void usage(void)
{
	fprintf(stderr, "Usage: flashimage [<options>] <command> [<arguments>] [<device>]\n"
		"The following options are available:\n"
		"	-q		quiet mode\n"
		"	-r		reboot after successful executed command\n"
		"	-e		erase <device> before executing the command\n"
		"The following commands are available:\n"
		"	unlock		unlock the device\n"
		"	erase		erase all data on device\n"
		"	write  <imgfile>|-	write packed imgfile to device\n"
		"	unpack <imgfile>|-	extract images from packde file\n"
		"	list   <imgfile>|-	list information in imgfile header\n"
		"NOTE: The <device> indicats the \"dev\" in /proc/mtd file (e.g. mtd2)\n");
	exit(1);
}

int main(int argc, char **argv)
{
	int ch, i, reboot, imgfd, force;
	int no_mtd = 0 ;
//	char *device;
//	char *imgfile;
	enum {
		CMD_ERASE,
		CMD_WRITE,
		CMD_UNLOCK,
		CMD_UNPACK,
		CMD_LIST
	} cmd;
//	struct pak_header *pak ;
//	char mtdname[30];
    int mtdno;
    char *devfile ;
	int nfd ;
	int n,rn, m;
	uint32_t offset ;
	char *filename ;	


	erase[0] = NULL ;
	reboot = force = buflen = quiet = 0;
	
	while (( ch = getopt(argc, argv, "frqe:")) != -1) {
		switch (ch) {
			case 'f':
				force = 1;
				break ;
			case 'r':
				reboot = 1;
				break;
			case 'q':
				quiet++;
				break;
			case 'e':
				i = 0;
				while ((erase[i] != NULL) && ((i+1) < MAX_ARGS)) i++;
				erase[i++] = optarg ;
				erase[i] = NULL ;
				break ;
			case '?':
			default :
				usage();
		}
	}

    if (!quiet)
		fprintf(stderr, "Flash Rom tools for Intel Xscale IXP4XX chipsets\n");

	if (init_ptable()) 
		no_mtd=1;

	argc -= optind;
	argv += optind;

	if (argc < 1) usage();

	if ((strcmp(argv[0], "unlock") == 0) && (argc == 2) && (no_mtd == 0)) {
		cmd = CMD_UNLOCK;
		device = argv[1];
	} else if ((strcmp(argv[0], "erase") == 0) && (argc == 2) && (no_mtd == 0)) {
		cmd = CMD_ERASE;
		device = argv[1];
	} else if ((strcmp(argv[0], "write") == 0) && (argc >= 2) && (no_mtd == 0)) {
		cmd = CMD_WRITE;
		if (argc == 3) {
			device = argv[2];
		} else device = NULL;
		if (strcmp(argv[1],"-") == 0) {
			imgfile = "<stdin>";
			imgfd = 0 ;
		} else {
			imgfile = argv[1];
			if ((imgfd = open(argv[1], O_RDONLY)) < 0) {
				fprintf(stderr, "Couldn't open imgfile: %s\n", imgfile);
				exit(1);
			}
		}
		if (!image_crc32_check(imgfd)) {
			if (!force) {
				fprintf(stderr, "Image file crc32 check failed.\n");
				exit(1);
			}
		}		
	} else if ((strcmp(argv[0], "unpack") == 0) && (argc >= 2)) {
		cmd = CMD_UNPACK;
		if (argc == 3) {
			device = argv[2];
		} else device = NULL;
		if (strcmp(argv[1],"-") == 0) {
			imgfile = "<stdin>";
			imgfd = 0 ;
		} else {
			imgfile = argv[1];
			if ((imgfd = open(argv[1], O_RDONLY)) < 0) {
				fprintf(stderr, "Couldn't open imgfile: %s\n", imgfile);
				exit(1);
			}
		}		
		if (!image_crc32_check(imgfd)) {
			if (!force) {
				fprintf(stderr, "Image file crc32 check failed.\n");
				exit(1);
			}
		}
	} else if ((strcmp(argv[0], "list") == 0) && ( argc >= 2)) {
		cmd = CMD_LIST;
		if (argc == 3) {
			device = argv[2];
		}
		else device = NULL;
			
		if (strcmp(argv[1],"-") == 0) {
			imgfile = "<stdin>";
			imgfd = 0 ;
		} else {
			imgfile = argv[1];
			if ((imgfd = open(argv[1], O_RDONLY)) < 0) {
				fprintf(stderr, "Couldn't open imgfile: %s\n", imgfile);
				exit(1);
			}
		}		
		if (!image_crc32_check(imgfd)) {
			if (!force) {
				fprintf(stderr, "Image file crc32 check failed.\n");
				exit(1);
			}
		}
	} else {
	    //   usage();
		cmd = CMD_LIST;
		device = NULL;
		if (strcmp(argv[0],"-") == 0) {
			imgfile = "<stdin>";
			imgfd = 0;
		} else {
			imgfile = argv[0];
			if ((imgfd = open(imgfile, O_RDONLY)) < 0) {
				fprintf(stderr, "Could not open imgfile: %s\n", imgfile);
				exit(1);
			}
		}
		if (!image_crc32_check(imgfd)) {
			if (!force) {
				fprintf(stderr, "Image file check failed.\n");
				exit(1);
			}
		}
	}

	if ((cmd == CMD_UNLOCK) || (cmd == CMD_ERASE) || (cmd == CMD_WRITE)) {
		sync();
		i = 0 ;
		unlocked = 0 ;
		while (erase[i] != NULL) {
			if (quiet < 2)
				fprintf(stderr, "Unlocking %s ... \n", erase[i]);
			mtd_unlock(erase[i]);
			if (quiet < 2)
				fprintf(stderr, "Erasing %s ... \n", erase[i]);
			mtd_erase(erase[i]);
			if (strcmp(erase[i], device) == 0)
				unlocked = 1;
			i++ ;
		}
		if (!unlocked && (device !=NULL)) {
			if (quiet < 2)
				fprintf(stderr, "Unlocking %s ... \n", device);
			mtd_unlock(device);
		}
    }

//FPRINTF(stderr, "Step 11\n");
	switch (cmd) {
		case CMD_UNLOCK:
			break;
		case CMD_ERASE:
			if (quiet < 2)
				fprintf(stderr, "Erasing %s ... \n", device);
			mtd_erase(device);
			break ;
        	case CMD_WRITE:
			if (device != NULL){
				if (quiet < 2)
					fprintf(stderr, "Writing device %s from packed file %s ...\n", device, imgfile);
	    		mtdno = -1 ;
				sscanf(device, "mtd%d", &mtdno);
				for (i=0; i < READ32_BE(pheader.icount); i++) {
					if ((strcmp(device, pheader.img[i].mtdname)==0)||(mtdno == READ32_BE(pheader.img[i].mtdno))){
						// we need only list this specified img info.
						mtdno = READ32_BE(pheader.img[i].mtdno);
						if (mtdno == get_proc_mtdno(device)){
                            //int my_mtd_write(int imgfd, int pt_id, int img_id)
							my_mtd_write(imgfd, mtdno, i);
						}
					}
				}
		    } else {   // device == NULL.
				if (quiet < 2)
					fprintf(stderr, "Writing images to mtd from packed file %s ...\n", imgfile);
				// means we shall write all images in Imgfile into mtd asa images are valid.
				for (i=0; i < READ32_BE(pheader.icount); i++) {	
                	mtdno = READ32_BE(pheader.img[i].mtdno);
					if (mtdno == get_proc_mtdno(pheader.img[i].mtdname)) {
						my_mtd_write(imgfd, mtdno, i);
					} else {
						fprintf(stderr, "WARNING: device \"%s\" has no relat mtd partition in /proc/mtd.\n",
										                  				pheader.img[i].mtdname);
						check_device_In_imgfile(pheader.img[i].mtdname, 1);
					}
                }
			}  	
			if (quiet < 2)
				fprintf(stderr, "\n");
			break;
		case CMD_UNPACK:
			if (device != NULL){
				if (quiet < 2)
					fprintf(stderr, "Extract \"%s\"'s images from %s ...\n", device, imgfile);
	    		mtdno = -1 ;
				sscanf(device, "mtd%d", &mtdno);
				//fprintf(stderr, "CMD_UNPACK: device = %s \n", device);
				for (i=0; i < READ32_BE(pheader.icount); i++) {
					if ((strcmp(device, pheader.img[i].mtdname)==0)||(mtdno == READ32_BE(pheader.img[i].mtdno))){
						// we need only list this specified img info.
						mtdno = READ32_BE(pheader.img[i].mtdno);
						devfile = ptable[mtdno].devfile;
						fprintf(stderr, "Extracting device \"%s\"'s image file : %s\n",
														device, pheader.img[i].filename);
						//my_mtd_write(i, devfile);
						offset = READ32_BE(pheader.img[i].offset);
						n = READ32_BE(pheader.img[i].len);
						filename = pheader.img[i].filename;
						lseek(imgfd, offset, 0);
						nfd = creat(filename, 0666);
                        rn = (n>sizeof(buf))? sizeof(buf):n;
						while (n>0) {
							m = read(imgfd, buf, rn);
							write(nfd, buf, rn);
							n -= rn;
							rn = (n>sizeof(buf))? sizeof(buf):n;
						}
						close(nfd);
					}
				}
		    } else {   // device == NULL.
				if (quiet < 2)
					fprintf(stderr, "Unpack images from %s ...\n", imgfile);
				// means we shall write all images in Imgfile into mtd asa images are valid.
				for (i=0; i < READ32_BE(pheader.icount); i++) {	
                	mtdno = READ32_BE(pheader.img[i].mtdno);
					devfile = ptable[mtdno].devfile;
					fprintf(stderr, "extracting \"%s\"'s image file : %s\n",
									pheader.img[i].mtdname, pheader.img[i].filename);
					//my_mtd_write(i, devfile);
					offset = READ32_BE(pheader.img[i].offset);
					n = READ32_BE(pheader.img[i].len);
					filename = pheader.img[i].filename;
					lseek(imgfd, offset, 0);
					nfd = creat(filename, 0666);
                    rn = (n>sizeof(buf))? sizeof(buf):n;
					while (n>0) {
						m = read(imgfd, buf, rn);
						write(nfd, buf, rn);
						n -= rn;
						rn = (n>sizeof(buf))? sizeof(buf):n;
					}
					close(nfd);
                }
			}  	
			if (quiet < 2)
				fprintf(stderr, "\n");
			break ;
		case CMD_LIST:
			// If device=NULL, This means there is no argv[3] on command line, Thus
			// we need to obtain mtdn from imgfile. So we first dig the
			// image header info.
			if (device != NULL) {
				check_device_In_imgfile(device, 1);
			} else {  // device = NULL
				show_imgfile_info();
			}		
			break;
		default:
			usage();
	}

	sync();

	if (reboot) {
		fprintf(stderr, "Rebooting ...\n");
		fflush(stderr);
		syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
					LINUX_REBOOT_CMD_RESTART, NULL );
	}

	return 0;
}

	

static const uint32_t crc_32_tab[] = { /* CRC polynomial 0xedb88320 */
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};

uint32_t crc32(uint32_t crc, char *buf, size_t len)
{
	while (len--) {
		crc = crc_32_tab[(crc^ *buf++) & 0xff] ^ (crc >> 8) ;
	}
	return crc;
}