git.zerfleddert.de Git - hmcfgusb/blob - flash-hmcfgusb.c

   1 /* flasher for HM-CFG-USB
   2  *
   3  * Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to
   7  * deal in the Software without restriction, including without limitation the
   8  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   9  * sell copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <stdint.h>
  28 #include <string.h>
  29 #include <strings.h>
  30 #include <poll.h>
  31 #include <errno.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <fcntl.h>
  35 #include <sys/time.h>
  36 #include <libusb-1.0/libusb.h>
  37
  38 #include "hexdump.h"
  39 #include "version.h"
  40 #include "hmcfgusb.h"
  41
  42 /* This might be wrong, but it works for current fw */
  43 #define MAX_BLOCK_LENGTH        512
  44
  45 struct recv_data {
  46         int ack;
  47 };
  48
  49 static int parse_hmcfgusb(uint8_t *buf, int buf_len, void *data)
  50 {
  51         struct recv_data *rdata = data;
  52
  53         if (buf_len != 1)
  54                 return 1;
  55
  56         rdata->ack = buf[0];
  57
  58         return 1;
  59 }
  60
  61 static uint8_t ascii_to_nibble(uint8_t a)
  62 {
  63         uint8_t c = 0x00;
  64
  65         if ((a >= '0') && (a <= '9')) {
  66                 c = a - '0';
  67         } else if ((a >= 'A') && (a <= 'F')) {
  68                 c = (a - 'A') + 10;
  69         } else if ((a >= 'a') && (a <= 'f')) {
  70                 c = (a - 'a') + 10;
  71         }
  72
  73         return c;
  74 }
  75
  76 static int validate_nibble(uint8_t a)
  77 {
  78         if (((a >= '0') && (a <= '9')) ||
  79             ((a >= 'A') && (a <= 'F')) ||
  80             ((a >= 'a') && (a <= 'f')))
  81                 return 1;
  82
  83         return 0;
  84 }
  85
  86 int main(int argc, char **argv)
  87 {
  88         const char twiddlie[] = { '-', '\\', '|', '/' };
  89         struct hmcfgusb_dev *dev;
  90         struct recv_data rdata;
  91         struct stat stat_buf;
  92         uint8_t buf[4096];
  93         uint16_t len;
  94         uint8_t **fw = NULL;
  95         int fw_blocks = 0;
  96         int block;
  97         int fd;
  98         int pfd;
  99         int r;
 100         int i;
 101         int debug = 0;
 102
 103         printf("HM-CFG-USB flasher version " VERSION "\n\n");
 104
 105         if (argc != 2) {
 106                 if (argc == 1)
 107                         fprintf(stderr, "Missing firmware filename!\n\n");
 108
 109                 fprintf(stderr, "Syntax: %s hmusbif.enc\n\n", argv[0]);
 110                 exit(EXIT_FAILURE);
 111         }
 112
 113         if (stat(argv[1], &stat_buf) == -1) {
 114                 fprintf(stderr, "Can't stat %s: %s\n", argv[1], strerror(errno));
 115                 exit(EXIT_FAILURE);
 116         }
 117
 118         fd = open(argv[1], O_RDONLY);
 119         if (fd < 0) {
 120                 fprintf(stderr, "Can't open %s: %s", argv[1], strerror(errno));
 121                 exit(EXIT_FAILURE);
 122         }
 123
 124         printf("Reading firmware from %s...\n", argv[1]);
 125         do {
 126                 memset(buf, 0, sizeof(buf));
 127                 r = read(fd, buf, 4);
 128                 if (r < 0) {
 129                         perror("read");
 130                         exit(EXIT_FAILURE);
 131                 } else if (r == 0) {
 132                         break;
 133                 } else if (r != 4) {
 134                         printf("can't get length information!\n");
 135                         exit(EXIT_FAILURE);
 136                 }
 137
 138                 for (i = 0; i < r; i++) {
 139                         if (!validate_nibble(buf[i])) {
 140                                 fprintf(stderr, "Firmware file not valid!\n");
 141                                 exit(EXIT_FAILURE);
 142                         }
 143                 }
 144
 145                 len = (ascii_to_nibble(buf[0]) & 0xf)<< 4;
 146                 len |= ascii_to_nibble(buf[1]) & 0xf;
 147                 len <<= 8;
 148                 len |= (ascii_to_nibble(buf[2]) & 0xf)<< 4;
 149                 len |= ascii_to_nibble(buf[3]) & 0xf;
 150
 151                 /* This might be wrong, but it works for current fw */
 152                 if (len > MAX_BLOCK_LENGTH) {
 153                         fprintf(stderr, "Invalid block-length %u > %u for block %d!\n", len, MAX_BLOCK_LENGTH, fw_blocks+1);
 154                         exit(EXIT_FAILURE);
 155                 }
 156
 157                 fw = realloc(fw, sizeof(uint8_t*) * (fw_blocks + 1));
 158                 if (fw == NULL) {
 159                         perror("Can't reallocate fw-blocklist");
 160                         exit(EXIT_FAILURE);
 161                 }
 162
 163                 fw[fw_blocks] = malloc(len + 4);
 164                 if (fw[fw_blocks] == NULL) {
 165                         perror("Can't allocate memory for fw-block");
 166                         exit(EXIT_FAILURE);
 167                 }
 168
 169                 fw[fw_blocks][0] = (fw_blocks >> 8) & 0xff;
 170                 fw[fw_blocks][1] = fw_blocks & 0xff;
 171                 fw[fw_blocks][2] = (len >> 8) & 0xff;
 172                 fw[fw_blocks][3] = len & 0xff;
 173
 174                 r = read(fd, buf, len * 2);
 175                 if (r < 0) {
 176                         perror("read");
 177                         exit(EXIT_FAILURE);
 178                 } else if (r < len * 2) {
 179                         fprintf(stderr, "short read, aborting (%d < %d)\n", r, len * 2);
 180                         exit(EXIT_FAILURE);
 181                 }
 182
 183                 for (i = 0; i < r; i+=2) {
 184                         if ((!validate_nibble(buf[i])) ||
 185                             (!validate_nibble(buf[i+1]))) {
 186                                 fprintf(stderr, "Firmware file not valid!\n");
 187                                 exit(EXIT_FAILURE);
 188                         }
 189
 190                         fw[fw_blocks][(i/2) + 4] = (ascii_to_nibble(buf[i]) & 0xf)<< 4;
 191                         fw[fw_blocks][(i/2) + 4] |= ascii_to_nibble(buf[i+1]) & 0xf;
 192                 }
 193
 194                 fw_blocks++;
 195                 if (debug)
 196                         printf("Firmware block %d with length %u read.\n", fw_blocks, len);
 197         } while(r > 0);
 198
 199         if (fw_blocks == 0) {
 200                 fprintf(stderr, "Firmware file not valid!\n");
 201                 exit(EXIT_FAILURE);
 202         }
 203
 204         printf("Firmware with %d blocks successfully read.\n", fw_blocks);
 205
 206         hmcfgusb_set_debug(debug);
 207
 208         memset(&rdata, 0, sizeof(rdata));
 209
 210         dev = hmcfgusb_init(parse_hmcfgusb, &rdata);
 211         if (!dev) {
 212                 fprintf(stderr, "Can't initialize HM-CFG-USB\n");
 213                 exit(EXIT_FAILURE);
 214         }
 215
 216         if (!dev->bootloader) {
 217                 fprintf(stderr, "\nHM-CFG-USB not in bootloader mode, entering bootloader.\n");
 218                 hmcfgusb_enter_bootloader(dev);
 219                 fprintf(stderr, "\nWaiting for device to reappear...\n");
 220
 221                 do {
 222                         sleep(1);
 223                 } while ((dev = hmcfgusb_init(parse_hmcfgusb, &rdata)) == NULL);
 224
 225                 if (!dev->bootloader) {
 226                         fprintf(stderr, "Can't enter bootloader, giving up!\n");
 227                         exit(EXIT_FAILURE);
 228                 }
 229         }
 230
 231         printf("\nHM-CFG-USB opened.\n\n");
 232
 233
 234         printf("Flashing %d blocks", fw_blocks);
 235         if (debug) {
 236                 printf("\n");
 237         } else {
 238                 printf(": %c", twiddlie[0]);
 239                 fflush(stdout);
 240         }
 241
 242         for (block = 0; block < fw_blocks; block++) {
 243                 len = fw[block][2] << 8;
 244                 len |= fw[block][3];
 245
 246                 len += 4; /* block nr., length */
 247
 248                 if (debug)
 249                         hexdump(fw[block], len, "F> ");
 250
 251                 rdata.ack = 0;
 252                 if (!hmcfgusb_send(dev, fw[block], len, 0)) {
 253                         perror("\n\nhmcfgusb_send");
 254                         exit(EXIT_FAILURE);
 255                 }
 256
 257                 if (debug)
 258                         printf("Waiting for ack...\n");
 259                 do {
 260                         errno = 0;
 261                         pfd = hmcfgusb_poll(dev, 1);
 262                         if ((pfd < 0) && errno) {
 263                                 perror("\n\nhmcfgusb_poll");
 264                                 exit(EXIT_FAILURE);
 265                         }
 266                         if (rdata.ack) {
 267                                 break;
 268                         }
 269                 } while (pfd < 0);
 270
 271                 if (rdata.ack == 2) {
 272                         printf("\n\nFirmware update successfull!\n");
 273                         break;
 274                 }
 275
 276                 if (rdata.ack != 1) {
 277                         fprintf(stderr, "\n\nError flashing block %d, status: %u\n", block, rdata.ack);
 278                         exit(EXIT_FAILURE);
 279                 }
 280
 281                 if (!debug) {
 282                         printf("\b%c", twiddlie[block % sizeof(twiddlie)]);
 283                         fflush(stdout);
 284                 }
 285                 free(fw[block]);
 286         }
 287
 288         free(fw);
 289
 290         hmcfgusb_close(dev);
 291
 292         return EXIT_SUCCESS;
 293 }