tools/kwboot.c

   1 /*
   2  * Boot a Marvell SoC, with Xmodem over UART0.
   3  *  supports Kirkwood, Dove, Armada 370, Armada XP, Armada 375, Armada 38x and
   4  *           Armada 39x
   5  *
   6  * (c) 2012 Daniel Stodden <daniel.stodden@gmail.com>
   7  * (c) 2021 Pali Rohár <pali@kernel.org>
   8  * (c) 2021 Marek Behún <marek.behun@nic.cz>
   9  *
  10  * References: marvell.com, "88F6180, 88F6190, 88F6192, and 88F6281
  11  *   Integrated Controller: Functional Specifications" December 2,
  12  *   2008. Chapter 24.2 "BootROM Firmware".
  13  */
  14
  15 #include "kwbimage.h"
  16 #include "mkimage.h"
  17 #include "version.h"
  18
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <stdarg.h>
  23 #include <image.h>
  24 #include <libgen.h>
  25 #include <fcntl.h>
  26 #include <errno.h>
  27 #include <unistd.h>
  28 #include <stdint.h>
  29 #include <time.h>
  30 #include <sys/stat.h>
  31
  32 #ifdef __linux__
  33 #include "termios_linux.h"
  34 #else
  35 #include <termios.h>
  36 #endif
  37
  38 /*
  39  * Marvell BootROM UART Sensing
  40  */
  41
  42 static unsigned char kwboot_msg_boot[] = {
  43         0xBB, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77
  44 };
  45
  46 static unsigned char kwboot_msg_debug[] = {
  47         0xDD, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77
  48 };
  49
  50 /* Defines known to work on Kirkwood */
  51 #define KWBOOT_MSG_REQ_DELAY    10 /* ms */
  52 #define KWBOOT_MSG_RSP_TIMEO    50 /* ms */
  53
  54 /* Defines known to work on Armada XP */
  55 #define KWBOOT_MSG_REQ_DELAY_AXP        1000 /* ms */
  56 #define KWBOOT_MSG_RSP_TIMEO_AXP        1000 /* ms */
  57
  58 /*
  59  * Xmodem Transfers
  60  */
  61
  62 #define SOH     1       /* sender start of block header */
  63 #define EOT     4       /* sender end of block transfer */
  64 #define ACK     6       /* target block ack */
  65 #define NAK     21      /* target block negative ack */
  66
  67 #define KWBOOT_XM_BLKSZ 128 /* xmodem block size */
  68
  69 struct kwboot_block {
  70         uint8_t soh;
  71         uint8_t pnum;
  72         uint8_t _pnum;
  73         uint8_t data[KWBOOT_XM_BLKSZ];
  74         uint8_t csum;
  75 } __packed;
  76
  77 #define KWBOOT_BLK_RSP_TIMEO 2000 /* ms */
  78 #define KWBOOT_HDR_RSP_TIMEO 10000 /* ms */
  79
  80 /* ARM code to change baudrate */
  81 static unsigned char kwboot_baud_code[] = {
  82                                 /* ; #define UART_BASE 0xd0012000             */
  83                                 /* ; #define DLL       0x00                   */
  84                                 /* ; #define DLH       0x04                   */
  85                                 /* ; #define LCR       0x0c                   */
  86                                 /* ; #define   DLAB    0x80                   */
  87                                 /* ; #define LSR       0x14                   */
  88                                 /* ; #define   TEMT    0x40                   */
  89                                 /* ; #define DIV_ROUND(a, b) ((a + b/2) / b)  */
  90                                 /* ;                                          */
  91                                 /* ; u32 set_baudrate(u32 old_b, u32 new_b) { */
  92                                 /* ;   while                                  */
  93                                 /* ;      (!(readl(UART_BASE + LSR) & TEMT)); */
  94                                 /* ;   u32 lcr = readl(UART_BASE + LCR);      */
  95                                 /* ;   writel(UART_BASE + LCR, lcr | DLAB);   */
  96                                 /* ;   u8 old_dll = readl(UART_BASE + DLL);   */
  97                                 /* ;   u8 old_dlh = readl(UART_BASE + DLH);   */
  98                                 /* ;   u16 old_dl = old_dll | (old_dlh << 8); */
  99                                 /* ;   u32 clk = old_b * old_dl;              */
 100                                 /* ;   u16 new_dl = DIV_ROUND(clk, new_b);    */
 101                                 /* ;   u8 new_dll = new_dl & 0xff;            */
 102                                 /* ;   u8 new_dlh = (new_dl >> 8) & 0xff;     */
 103                                 /* ;   writel(UART_BASE + DLL, new_dll);      */
 104                                 /* ;   writel(UART_BASE + DLH, new_dlh);      */
 105                                 /* ;   writel(UART_BASE + LCR, lcr & ~DLAB);  */
 106                                 /* ;   msleep(5);                             */
 107                                 /* ;   return 0;                              */
 108                                 /* ; }                                        */
 109
 110                                 /*  ; r0 = UART_BASE                          */
 111         0x0d, 0x02, 0xa0, 0xe3, /* mov   r0, #0xd0000000                      */
 112         0x12, 0x0a, 0x80, 0xe3, /* orr   r0, r0, #0x12000                     */
 113
 114                                 /*  ; Wait until Transmitter FIFO is Empty    */
 115                                 /* .Lloop_txempty:                            */
 116                                 /*  ; r1 = UART_BASE[LSR] & TEMT              */
 117         0x14, 0x10, 0x90, 0xe5, /* ldr   r1, [r0, #0x14]                      */
 118         0x40, 0x00, 0x11, 0xe3, /* tst   r1, #0x40                            */
 119         0xfc, 0xff, 0xff, 0x0a, /* beq   .Lloop_txempty                       */
 120
 121                                 /*  ; Set Divisor Latch Access Bit            */
 122                                 /*  ; UART_BASE[LCR] |= DLAB                  */
 123         0x0c, 0x10, 0x90, 0xe5, /* ldr   r1, [r0, #0x0c]                      */
 124         0x80, 0x10, 0x81, 0xe3, /* orr   r1, r1, #0x80                        */
 125         0x0c, 0x10, 0x80, 0xe5, /* str   r1, [r0, #0x0c]                      */
 126
 127                                 /*  ; Read current Divisor Latch              */
 128                                 /*  ; r1 = UART_BASE[DLH]<<8 | UART_BASE[DLL] */
 129         0x00, 0x10, 0x90, 0xe5, /* ldr   r1, [r0, #0x00]                      */
 130         0xff, 0x10, 0x01, 0xe2, /* and   r1, r1, #0xff                        */
 131         0x01, 0x20, 0xa0, 0xe1, /* mov   r2, r1                               */
 132         0x04, 0x10, 0x90, 0xe5, /* ldr   r1, [r0, #0x04]                      */
 133         0xff, 0x10, 0x01, 0xe2, /* and   r1, r1, #0xff                        */
 134         0x41, 0x14, 0xa0, 0xe1, /* asr   r1, r1, #8                           */
 135         0x02, 0x10, 0x81, 0xe1, /* orr   r1, r1, r2                           */
 136
 137                                 /*  ; Read old baudrate value                 */
 138                                 /*  ; r2 = old_baudrate                       */
 139         0x74, 0x20, 0x9f, 0xe5, /* ldr   r2, old_baudrate                     */
 140
 141                                 /*  ; Calculate base clock                    */
 142                                 /*  ; r1 = r2 * r1                            */
 143         0x92, 0x01, 0x01, 0xe0, /* mul   r1, r2, r1                           */
 144
 145                                 /*  ; Read new baudrate value                 */
 146                                 /*  ; r2 = new_baudrate                       */
 147         0x70, 0x20, 0x9f, 0xe5, /* ldr   r2, new_baudrate                     */
 148
 149                                 /*  ; Calculate new Divisor Latch             */
 150                                 /*  ; r1 = DIV_ROUND(r1, r2) =                */
 151                                 /*  ;    = (r1 + r2/2) / r2                   */
 152         0xa2, 0x10, 0x81, 0xe0, /* add   r1, r1, r2, lsr #1                   */
 153         0x02, 0x40, 0xa0, 0xe1, /* mov   r4, r2                               */
 154         0xa1, 0x00, 0x54, 0xe1, /* cmp   r4, r1, lsr #1                       */
 155                                 /* .Lloop_div1:                               */
 156         0x84, 0x40, 0xa0, 0x91, /* movls r4, r4, lsl #1                       */
 157         0xa1, 0x00, 0x54, 0xe1, /* cmp   r4, r1, lsr #1                       */
 158         0xfc, 0xff, 0xff, 0x9a, /* bls   .Lloop_div1                          */
 159         0x00, 0x30, 0xa0, 0xe3, /* mov   r3, #0                               */
 160                                 /* .Lloop_div2:                               */
 161         0x04, 0x00, 0x51, 0xe1, /* cmp   r1, r4                               */
 162         0x04, 0x10, 0x41, 0x20, /* subhs r1, r1, r4                           */
 163         0x03, 0x30, 0xa3, 0xe0, /* adc   r3, r3, r3                           */
 164         0xa4, 0x40, 0xa0, 0xe1, /* mov   r4, r4, lsr #1                       */
 165         0x02, 0x00, 0x54, 0xe1, /* cmp   r4, r2                               */
 166         0xf9, 0xff, 0xff, 0x2a, /* bhs   .Lloop_div2                          */
 167         0x03, 0x10, 0xa0, 0xe1, /* mov   r1, r3                               */
 168
 169                                 /*  ; Set new Divisor Latch Low               */
 170                                 /*  ; UART_BASE[DLL] = r1 & 0xff              */
 171         0x01, 0x20, 0xa0, 0xe1, /* mov   r2, r1                               */
 172         0xff, 0x20, 0x02, 0xe2, /* and   r2, r2, #0xff                        */
 173         0x00, 0x20, 0x80, 0xe5, /* str   r2, [r0, #0x00]                      */
 174
 175                                 /*  ; Set new Divisor Latch High              */
 176                                 /*  ; UART_BASE[DLH] = r1>>8 & 0xff           */
 177         0x41, 0x24, 0xa0, 0xe1, /* asr   r2, r1, #8                           */
 178         0xff, 0x20, 0x02, 0xe2, /* and   r2, r2, #0xff                        */
 179         0x04, 0x20, 0x80, 0xe5, /* str   r2, [r0, #0x04]                      */
 180
 181                                 /*  ; Clear Divisor Latch Access Bit          */
 182                                 /*  ; UART_BASE[LCR] &= ~DLAB                 */
 183         0x0c, 0x10, 0x90, 0xe5, /* ldr   r1, [r0, #0x0c]                      */
 184         0x80, 0x10, 0xc1, 0xe3, /* bic   r1, r1, #0x80                        */
 185         0x0c, 0x10, 0x80, 0xe5, /* str   r1, [r0, #0x0c]                      */
 186
 187                                 /*  ; Loop 0x2dc000 (2998272) cycles          */
 188                                 /*  ; which is about 5ms on 1200 MHz CPU      */
 189                                 /*  ; r1 = 0x2dc000                           */
 190         0xb7, 0x19, 0xa0, 0xe3, /* mov   r1, #0x2dc000                        */
 191                                 /* .Lloop_sleep:                              */
 192         0x01, 0x10, 0x41, 0xe2, /* sub   r1, r1, #1                           */
 193         0x00, 0x00, 0x51, 0xe3, /* cmp   r1, #0                               */
 194         0xfc, 0xff, 0xff, 0x1a, /* bne   .Lloop_sleep                         */
 195
 196                                 /*  ; Jump to the end of execution            */
 197         0x01, 0x00, 0x00, 0xea, /* b     end                                  */
 198
 199                                 /*  ; Placeholder for old baudrate value      */
 200                                 /* old_baudrate:                              */
 201         0x00, 0x00, 0x00, 0x00, /* .word 0                                    */
 202
 203                                 /*  ; Placeholder for new baudrate value      */
 204                                 /* new_baudrate:                              */
 205         0x00, 0x00, 0x00, 0x00, /* .word 0                                    */
 206
 207                                 /* end:                                       */
 208 };
 209
 210 /* ARM code from binary header executed by BootROM before changing baudrate */
 211 static unsigned char kwboot_baud_code_binhdr_pre[] = {
 212                                 /* ; #define UART_BASE 0xd0012000             */
 213                                 /* ; #define THR       0x00                   */
 214                                 /* ; #define LSR       0x14                   */
 215                                 /* ; #define   THRE    0x20                   */
 216                                 /* ;                                          */
 217                                 /* ; void send_preamble(void) {               */
 218                                 /* ;   const u8 *str = "$baudratechange";     */
 219                                 /* ;   u8 c;                                  */
 220                                 /* ;   do {                                   */
 221                                 /* ;       while                              */
 222                                 /* ;       ((readl(UART_BASE + LSR) & THRE)); */
 223                                 /* ;       c = *str++;                        */
 224                                 /* ;       writel(UART_BASE + THR, c);        */
 225                                 /* ;   } while (c);                           */
 226                                 /* ; }                                        */
 227
 228                                 /*  ; Preserve registers for BootROM          */
 229         0xfe, 0x5f, 0x2d, 0xe9, /* push  { r1 - r12, lr }                     */
 230
 231                                 /*  ; r0 = UART_BASE                          */
 232         0x0d, 0x02, 0xa0, 0xe3, /* mov   r0, #0xd0000000                      */
 233         0x12, 0x0a, 0x80, 0xe3, /* orr   r0, r0, #0x12000                     */
 234
 235                                 /*  ; r2 = address of preamble string         */
 236         0x00, 0x20, 0x8f, 0xe2, /* adr   r2, .Lstr_preamble                   */
 237
 238                                 /*  ; Skip preamble data section              */
 239         0x03, 0x00, 0x00, 0xea, /* b     .Lloop_preamble                      */
 240
 241                                 /*  ; Preamble string                         */
 242                                 /* .Lstr_preamble:                            */
 243         0x24, 0x62, 0x61, 0x75, /* .asciz "$baudratechange"                   */
 244         0x64, 0x72, 0x61, 0x74,
 245         0x65, 0x63, 0x68, 0x61,
 246         0x6e, 0x67, 0x65, 0x00,
 247
 248                                 /*  ; Send preamble string over UART          */
 249                                 /* .Lloop_preamble:                           */
 250                                 /*                                            */
 251                                 /*  ; Wait until Transmitter Holding is Empty */
 252                                 /* .Lloop_thre:                               */
 253                                 /*  ; r1 = UART_BASE[LSR] & THRE              */
 254         0x14, 0x10, 0x90, 0xe5, /* ldr   r1, [r0, #0x14]                      */
 255         0x20, 0x00, 0x11, 0xe3, /* tst   r1, #0x20                            */
 256         0xfc, 0xff, 0xff, 0x0a, /* beq   .Lloop_thre                          */
 257
 258                                 /*  ; Put character into Transmitter FIFO     */
 259                                 /*  ; r1 = *r2++                              */
 260         0x01, 0x10, 0xd2, 0xe4, /* ldrb  r1, [r2], #1                         */
 261                                 /*  ; UART_BASE[THR] = r1                     */
 262         0x00, 0x10, 0x80, 0xe5, /* str   r1, [r0, #0x0]                       */
 263
 264                                 /*  ; Loop until end of preamble string       */
 265         0x00, 0x00, 0x51, 0xe3, /* cmp   r1, #0                               */
 266         0xf8, 0xff, 0xff, 0x1a, /* bne   .Lloop_preamble                      */
 267 };
 268
 269 /* ARM code for returning from binary header back to BootROM */
 270 static unsigned char kwboot_baud_code_binhdr_post[] = {
 271                                 /*  ; Return 0 - no error                     */
 272         0x00, 0x00, 0xa0, 0xe3, /* mov   r0, #0                               */
 273         0xfe, 0x9f, 0xbd, 0xe8, /* pop   { r1 - r12, pc }                     */
 274 };
 275
 276 /* ARM code for jumping to the original image exec_addr */
 277 static unsigned char kwboot_baud_code_data_jump[] = {
 278         0x04, 0xf0, 0x1f, 0xe5, /* ldr   pc, exec_addr                        */
 279                                 /*  ; Placeholder for exec_addr               */
 280                                 /* exec_addr:                                 */
 281         0x00, 0x00, 0x00, 0x00, /* .word 0                                    */
 282 };
 283
 284 static const char kwb_baud_magic[16] = "$baudratechange";
 285
 286 static int kwboot_verbose;
 287
 288 static int msg_req_delay = KWBOOT_MSG_REQ_DELAY;
 289 static int msg_rsp_timeo = KWBOOT_MSG_RSP_TIMEO;
 290 static int blk_rsp_timeo = KWBOOT_BLK_RSP_TIMEO;
 291
 292 static ssize_t
 293 kwboot_write(int fd, const char *buf, size_t len)
 294 {
 295         size_t tot = 0;
 296
 297         while (tot < len) {
 298                 ssize_t wr = write(fd, buf + tot, len - tot);
 299
 300                 if (wr < 0)
 301                         return -1;
 302
 303                 tot += wr;
 304         }
 305
 306         return tot;
 307 }
 308
 309 static void
 310 kwboot_printv(const char *fmt, ...)
 311 {
 312         va_list ap;
 313
 314         if (kwboot_verbose) {
 315                 va_start(ap, fmt);
 316                 vprintf(fmt, ap);
 317                 va_end(ap);
 318                 fflush(stdout);
 319         }
 320 }
 321
 322 static void
 323 __spinner(void)
 324 {
 325         const char seq[] = { '-', '\\', '|', '/' };
 326         const int div = 8;
 327         static int state, bs;
 328
 329         if (state % div == 0) {
 330                 fputc(bs, stdout);
 331                 fputc(seq[state / div % sizeof(seq)], stdout);
 332                 fflush(stdout);
 333         }
 334
 335         bs = '\b';
 336         state++;
 337 }
 338
 339 static void
 340 kwboot_spinner(void)
 341 {
 342         if (kwboot_verbose)
 343                 __spinner();
 344 }
 345
 346 static void
 347 __progress(int pct, char c)
 348 {
 349         const int width = 70;
 350         static const char *nl = "";
 351         static int pos;
 352
 353         if (pos % width == 0)
 354                 printf("%s%3d %% [", nl, pct);
 355
 356         fputc(c, stdout);
 357
 358         nl = "]\n";
 359         pos = (pos + 1) % width;
 360
 361         if (pct == 100) {
 362                 while (pos && pos++ < width)
 363                         fputc(' ', stdout);
 364                 fputs(nl, stdout);
 365                 nl = "";
 366                 pos = 0;
 367         }
 368
 369         fflush(stdout);
 370
 371 }
 372
 373 static void
 374 kwboot_progress(int _pct, char c)
 375 {
 376         static int pct;
 377
 378         if (_pct != -1)
 379                 pct = _pct;
 380
 381         if (kwboot_verbose)
 382                 __progress(pct, c);
 383
 384         if (pct == 100)
 385                 pct = 0;
 386 }
 387
 388 static int
 389 kwboot_tty_recv(int fd, void *buf, size_t len, int timeo)
 390 {
 391         int rc, nfds;
 392         fd_set rfds;
 393         struct timeval tv;
 394         ssize_t n;
 395
 396         rc = -1;
 397
 398         FD_ZERO(&rfds);
 399         FD_SET(fd, &rfds);
 400
 401         tv.tv_sec = 0;
 402         tv.tv_usec = timeo * 1000;
 403         if (tv.tv_usec > 1000000) {
 404                 tv.tv_sec += tv.tv_usec / 1000000;
 405                 tv.tv_usec %= 1000000;
 406         }
 407
 408         do {
 409                 nfds = select(fd + 1, &rfds, NULL, NULL, &tv);
 410                 if (nfds < 0)
 411                         goto out;
 412                 if (!nfds) {
 413                         errno = ETIMEDOUT;
 414                         goto out;
 415                 }
 416
 417                 n = read(fd, buf, len);
 418                 if (n <= 0)
 419                         goto out;
 420
 421                 buf = (char *)buf + n;
 422                 len -= n;
 423         } while (len > 0);
 424
 425         rc = 0;
 426 out:
 427         return rc;
 428 }
 429
 430 static int
 431 kwboot_tty_send(int fd, const void *buf, size_t len, int nodrain)
 432 {
 433         if (!buf)
 434                 return 0;
 435
 436         if (kwboot_write(fd, buf, len) < 0)
 437                 return -1;
 438
 439         if (nodrain)
 440                 return 0;
 441
 442         return tcdrain(fd);
 443 }
 444
 445 static int
 446 kwboot_tty_send_char(int fd, unsigned char c)
 447 {
 448         return kwboot_tty_send(fd, &c, 1, 0);
 449 }
 450
 451 static speed_t
 452 kwboot_tty_baudrate_to_speed(int baudrate)
 453 {
 454         switch (baudrate) {
 455 #ifdef B4000000
 456         case 4000000:
 457                 return B4000000;
 458 #endif
 459 #ifdef B3500000
 460         case 3500000:
 461                 return B3500000;
 462 #endif
 463 #ifdef B3000000
 464         case 3000000:
 465                 return B3000000;
 466 #endif
 467 #ifdef B2500000
 468         case 2500000:
 469                 return B2500000;
 470 #endif
 471 #ifdef B2000000
 472         case 2000000:
 473                 return B2000000;
 474 #endif
 475 #ifdef B1500000
 476         case 1500000:
 477                 return B1500000;
 478 #endif
 479 #ifdef B1152000
 480         case 1152000:
 481                 return B1152000;
 482 #endif
 483 #ifdef B1000000
 484         case 1000000:
 485                 return B1000000;
 486 #endif
 487 #ifdef B921600
 488         case 921600:
 489                 return B921600;
 490 #endif
 491 #ifdef B614400
 492         case 614400:
 493                 return B614400;
 494 #endif
 495 #ifdef B576000
 496         case 576000:
 497                 return B576000;
 498 #endif
 499 #ifdef B500000
 500         case 500000:
 501                 return B500000;
 502 #endif
 503 #ifdef B460800
 504         case 460800:
 505                 return B460800;
 506 #endif
 507 #ifdef B307200
 508         case 307200:
 509                 return B307200;
 510 #endif
 511 #ifdef B230400
 512         case 230400:
 513                 return B230400;
 514 #endif
 515 #ifdef B153600
 516         case 153600:
 517                 return B153600;
 518 #endif
 519 #ifdef B115200
 520         case 115200:
 521                 return B115200;
 522 #endif
 523 #ifdef B76800
 524         case 76800:
 525                 return B76800;
 526 #endif
 527 #ifdef B57600
 528         case 57600:
 529                 return B57600;
 530 #endif
 531 #ifdef B38400
 532         case 38400:
 533                 return B38400;
 534 #endif
 535 #ifdef B19200
 536         case 19200:
 537                 return B19200;
 538 #endif
 539 #ifdef B9600
 540         case 9600:
 541                 return B9600;
 542 #endif
 543 #ifdef B4800
 544         case 4800:
 545                 return B4800;
 546 #endif
 547 #ifdef B2400
 548         case 2400:
 549                 return B2400;
 550 #endif
 551 #ifdef B1800
 552         case 1800:
 553                 return B1800;
 554 #endif
 555 #ifdef B1200
 556         case 1200:
 557                 return B1200;
 558 #endif
 559 #ifdef B600
 560         case 600:
 561                 return B600;
 562 #endif
 563 #ifdef B300
 564         case 300:
 565                 return B300;
 566 #endif
 567 #ifdef B200
 568         case 200:
 569                 return B200;
 570 #endif
 571 #ifdef B150
 572         case 150:
 573                 return B150;
 574 #endif
 575 #ifdef B134
 576         case 134:
 577                 return B134;
 578 #endif
 579 #ifdef B110
 580         case 110:
 581                 return B110;
 582 #endif
 583 #ifdef B75
 584         case 75:
 585                 return B75;
 586 #endif
 587 #ifdef B50
 588         case 50:
 589                 return B50;
 590 #endif
 591         default:
 592 #ifdef BOTHER
 593                 return BOTHER;
 594 #else
 595                 return B0;
 596 #endif
 597         }
 598 }
 599
 600 static int
 601 _is_within_tolerance(int value, int reference, int tolerance)
 602 {
 603         return 100 * value >= reference * (100 - tolerance) &&
 604                100 * value <= reference * (100 + tolerance);
 605 }
 606
 607 static int
 608 kwboot_tty_change_baudrate(int fd, int baudrate)
 609 {
 610         struct termios tio;
 611         speed_t speed;
 612         int rc;
 613
 614         rc = tcgetattr(fd, &tio);
 615         if (rc)
 616                 return rc;
 617
 618         speed = kwboot_tty_baudrate_to_speed(baudrate);
 619         if (speed == B0) {
 620                 errno = EINVAL;
 621                 return -1;
 622         }
 623
 624 #ifdef BOTHER
 625         if (speed == BOTHER)
 626                 tio.c_ospeed = tio.c_ispeed = baudrate;
 627 #endif
 628
 629         rc = cfsetospeed(&tio, speed);
 630         if (rc)
 631                 return rc;
 632
 633         rc = cfsetispeed(&tio, speed);
 634         if (rc)
 635                 return rc;
 636
 637         rc = tcsetattr(fd, TCSANOW, &tio);
 638         if (rc)
 639                 return rc;
 640
 641         rc = tcgetattr(fd, &tio);
 642         if (rc)
 643                 return rc;
 644
 645         if (cfgetospeed(&tio) != speed || cfgetispeed(&tio) != speed)
 646                 goto baud_fail;
 647
 648 #ifdef BOTHER
 649         /*
 650          * Check whether set baudrate is within 3% tolerance.
 651          * If BOTHER is defined, Linux always fills out c_ospeed / c_ispeed
 652          * with real values.
 653          */
 654         if (!_is_within_tolerance(tio.c_ospeed, baudrate, 3))
 655                 goto baud_fail;
 656
 657         if (!_is_within_tolerance(tio.c_ispeed, baudrate, 3))
 658                 goto baud_fail;
 659 #endif
 660
 661         return 0;
 662
 663 baud_fail:
 664         fprintf(stderr, "Could not set baudrate to requested value\n");
 665         errno = EINVAL;
 666         return -1;
 667 }
 668
 669 static int
 670 kwboot_open_tty(const char *path, int baudrate)
 671 {
 672         int rc, fd, flags;
 673         struct termios tio;
 674
 675         rc = -1;
 676
 677         fd = open(path, O_RDWR | O_NOCTTY | O_NDELAY);
 678         if (fd < 0)
 679                 goto out;
 680
 681         rc = tcgetattr(fd, &tio);
 682         if (rc)
 683                 goto out;
 684
 685         cfmakeraw(&tio);
 686         tio.c_cflag |= CREAD | CLOCAL;
 687         tio.c_cflag &= ~(CSTOPB | HUPCL | CRTSCTS);
 688         tio.c_cc[VMIN] = 1;
 689         tio.c_cc[VTIME] = 0;
 690
 691         rc = tcsetattr(fd, TCSANOW, &tio);
 692         if (rc)
 693                 goto out;
 694
 695         flags = fcntl(fd, F_GETFL);
 696         if (flags < 0)
 697                 goto out;
 698
 699         rc = fcntl(fd, F_SETFL, flags & ~O_NDELAY);
 700         if (rc)
 701                 goto out;
 702
 703         rc = kwboot_tty_change_baudrate(fd, baudrate);
 704         if (rc)
 705                 goto out;
 706
 707         rc = fd;
 708 out:
 709         if (rc < 0) {
 710                 if (fd >= 0)
 711                         close(fd);
 712         }
 713
 714         return rc;
 715 }
 716
 717 static int
 718 kwboot_bootmsg(int tty, void *msg)
 719 {
 720         int rc;
 721         char c;
 722         int count;
 723
 724         if (msg == NULL)
 725                 kwboot_printv("Please reboot the target into UART boot mode...");
 726         else
 727                 kwboot_printv("Sending boot message. Please reboot the target...");
 728
 729         do {
 730                 rc = tcflush(tty, TCIOFLUSH);
 731                 if (rc)
 732                         break;
 733
 734                 for (count = 0; count < 128; count++) {
 735                         rc = kwboot_tty_send(tty, msg, 8, 0);
 736                         if (rc) {
 737                                 usleep(msg_req_delay * 1000);
 738                                 continue;
 739                         }
 740                 }
 741
 742                 rc = kwboot_tty_recv(tty, &c, 1, msg_rsp_timeo);
 743
 744                 kwboot_spinner();
 745
 746         } while (rc || c != NAK);
 747
 748         kwboot_printv("\n");
 749
 750         return rc;
 751 }
 752
 753 static int
 754 kwboot_debugmsg(int tty, void *msg)
 755 {
 756         int rc;
 757
 758         kwboot_printv("Sending debug message. Please reboot the target...");
 759
 760         do {
 761                 char buf[16];
 762
 763                 rc = tcflush(tty, TCIOFLUSH);
 764                 if (rc)
 765                         break;
 766
 767                 rc = kwboot_tty_send(tty, msg, 8, 0);
 768                 if (rc) {
 769                         usleep(msg_req_delay * 1000);
 770                         continue;
 771                 }
 772
 773                 rc = kwboot_tty_recv(tty, buf, 16, msg_rsp_timeo);
 774
 775                 kwboot_spinner();
 776
 777         } while (rc);
 778
 779         kwboot_printv("\n");
 780
 781         return rc;
 782 }
 783
 784 static size_t
 785 kwboot_xm_makeblock(struct kwboot_block *block, const void *data,
 786                     size_t size, int pnum)
 787 {
 788         size_t i, n;
 789
 790         block->soh = SOH;
 791         block->pnum = pnum;
 792         block->_pnum = ~block->pnum;
 793
 794         n = size < KWBOOT_XM_BLKSZ ? size : KWBOOT_XM_BLKSZ;
 795         memcpy(&block->data[0], data, n);
 796         memset(&block->data[n], 0, KWBOOT_XM_BLKSZ - n);
 797
 798         block->csum = 0;
 799         for (i = 0; i < n; i++)
 800                 block->csum += block->data[i];
 801
 802         return n;
 803 }
 804
 805 static uint64_t
 806 _now(void)
 807 {
 808         struct timespec ts;
 809
 810         if (clock_gettime(CLOCK_MONOTONIC, &ts)) {
 811                 static int err_print;
 812
 813                 if (!err_print) {
 814                         perror("clock_gettime() does not work");
 815                         err_print = 1;
 816                 }
 817
 818                 /* this will just make the timeout not work */
 819                 return -1ULL;
 820         }
 821
 822         return ts.tv_sec * 1000ULL + (ts.tv_nsec + 500000) / 1000000;
 823 }
 824
 825 static int
 826 _is_xm_reply(char c)
 827 {
 828         return c == ACK || c == NAK;
 829 }
 830
 831 static int
 832 _xm_reply_to_error(int c)
 833 {
 834         int rc = -1;
 835
 836         switch (c) {
 837         case ACK:
 838                 rc = 0;
 839                 break;
 840         case NAK:
 841                 errno = EBADMSG;
 842                 break;
 843         default:
 844                 errno = EPROTO;
 845                 break;
 846         }
 847
 848         return rc;
 849 }
 850
 851 static int
 852 kwboot_baud_magic_handle(int fd, char c, int baudrate)
 853 {
 854         static size_t rcv_len;
 855
 856         if (rcv_len < sizeof(kwb_baud_magic)) {
 857                 /* try to recognize whole magic word */
 858                 if (c == kwb_baud_magic[rcv_len]) {
 859                         rcv_len++;
 860                 } else {
 861                         printf("%.*s%c", (int)rcv_len, kwb_baud_magic, c);
 862                         fflush(stdout);
 863                         rcv_len = 0;
 864                 }
 865         }
 866
 867         if (rcv_len == sizeof(kwb_baud_magic)) {
 868                 /* magic word received */
 869                 kwboot_printv("\nChanging baudrate to %d Bd\n", baudrate);
 870
 871                 return kwboot_tty_change_baudrate(fd, baudrate) ? : 1;
 872         } else {
 873                 return 0;
 874         }
 875 }
 876
 877 static int
 878 kwboot_xm_recv_reply(int fd, char *c, int stop_on_non_xm,
 879                      int ignore_nak_reply,
 880                      int allow_non_xm, int *non_xm_print,
 881                      int baudrate, int *baud_changed)
 882 {
 883         int timeout = allow_non_xm ? KWBOOT_HDR_RSP_TIMEO : blk_rsp_timeo;
 884         uint64_t recv_until = _now() + timeout;
 885         int rc;
 886
 887         while (1) {
 888                 rc = kwboot_tty_recv(fd, c, 1, timeout);
 889                 if (rc) {
 890                         if (errno != ETIMEDOUT)
 891                                 return rc;
 892                         else if (allow_non_xm && *non_xm_print)
 893                                 return -1;
 894                         else
 895                                 *c = NAK;
 896                 }
 897
 898                 /* If received xmodem reply, end. */
 899                 if (_is_xm_reply(*c)) {
 900                         if (*c == NAK && ignore_nak_reply) {
 901                                 timeout = recv_until - _now();
 902                                 if (timeout >= 0)
 903                                         continue;
 904                         }
 905                         break;
 906                 }
 907
 908                 /*
 909                  * If receiving/printing non-xmodem text output is allowed and
 910                  * such a byte was received, we want to increase receiving time
 911                  * and either:
 912                  * - print the byte, if it is not part of baudrate change magic
 913                  *   sequence while baudrate change was requested (-B option)
 914                  * - change baudrate
 915                  * Otherwise decrease timeout by time elapsed.
 916                  */
 917                 if (allow_non_xm) {
 918                         recv_until = _now() + timeout;
 919
 920                         if (baudrate && !*baud_changed) {
 921                                 rc = kwboot_baud_magic_handle(fd, *c, baudrate);
 922                                 if (rc == 1)
 923                                         *baud_changed = 1;
 924                                 else if (!rc)
 925                                         *non_xm_print = 1;
 926                                 else
 927                                         return rc;
 928                         } else if (!baudrate || !*baud_changed) {
 929                                 putchar(*c);
 930                                 fflush(stdout);
 931                                 *non_xm_print = 1;
 932                         }
 933                 } else {
 934                         if (stop_on_non_xm)
 935                                 break;
 936                         timeout = recv_until - _now();
 937                         if (timeout < 0) {
 938                                 errno = ETIMEDOUT;
 939                                 return -1;
 940                         }
 941                 }
 942         }
 943
 944         return 0;
 945 }
 946
 947 static int
 948 kwboot_xm_sendblock(int fd, struct kwboot_block *block, int allow_non_xm,
 949                     int *done_print, int baudrate)
 950 {
 951         int non_xm_print, baud_changed;
 952         int rc, err, retries;
 953         char c;
 954
 955         *done_print = 0;
 956         non_xm_print = 0;
 957         baud_changed = 0;
 958
 959         retries = 0;
 960         do {
 961                 rc = kwboot_tty_send(fd, block, sizeof(*block), 1);
 962                 if (rc)
 963                         goto err;
 964
 965                 if (allow_non_xm && !*done_print) {
 966                         kwboot_progress(100, '.');
 967                         kwboot_printv("Done\n");
 968                         *done_print = 1;
 969                 }
 970
 971                 rc = kwboot_xm_recv_reply(fd, &c, retries < 3,
 972                                           retries > 8,
 973                                           allow_non_xm, &non_xm_print,
 974                                           baudrate, &baud_changed);
 975                 if (rc)
 976                         goto err;
 977
 978                 if (!allow_non_xm && c != ACK)
 979                         kwboot_progress(-1, '+');
 980         } while (c == NAK && retries++ < 16);
 981
 982         if (non_xm_print)
 983                 kwboot_printv("\n");
 984
 985         if (allow_non_xm && baudrate && !baud_changed) {
 986                 fprintf(stderr, "Baudrate was not changed\n");
 987                 errno = EPROTO;
 988                 return -1;
 989         }
 990
 991         return _xm_reply_to_error(c);
 992 err:
 993         err = errno;
 994         kwboot_printv("\n");
 995         errno = err;
 996         return rc;
 997 }
 998
 999 static int
1000 kwboot_xm_finish(int fd)
1001 {
1002         int rc, retries;
1003         char c;
1004
1005         kwboot_printv("Finishing transfer\n");
1006
1007         retries = 0;
1008         do {
1009                 rc = kwboot_tty_send_char(fd, EOT);
1010                 if (rc)
1011                         return rc;
1012
1013                 rc = kwboot_xm_recv_reply(fd, &c, retries < 3,
1014                                           retries > 8,
1015                                           0, NULL, 0, NULL);
1016                 if (rc)
1017                         return rc;
1018         } while (c == NAK && retries++ < 16);
1019
1020         return _xm_reply_to_error(c);
1021 }
1022
1023 static int
1024 kwboot_xmodem_one(int tty, int *pnum, int header, const uint8_t *data,
1025                   size_t size, int baudrate)
1026 {
1027         int done_print = 0;
1028         size_t sent, left;
1029         int rc;
1030
1031         kwboot_printv("Sending boot image %s (%zu bytes)...\n",
1032                       header ? "header" : "data", size);
1033
1034         left = size;
1035         sent = 0;
1036
1037         while (sent < size) {
1038                 struct kwboot_block block;
1039                 int last_block;
1040                 size_t blksz;
1041
1042                 blksz = kwboot_xm_makeblock(&block, data, left, (*pnum)++);
1043                 data += blksz;
1044
1045                 last_block = (left <= blksz);
1046
1047                 rc = kwboot_xm_sendblock(tty, &block, header && last_block,
1048                                          &done_print, baudrate);
1049                 if (rc)
1050                         goto out;
1051
1052                 sent += blksz;
1053                 left -= blksz;
1054
1055                 if (!done_print)
1056                         kwboot_progress(sent * 100 / size, '.');
1057         }
1058
1059         if (!done_print)
1060                 kwboot_printv("Done\n");
1061
1062         return 0;
1063 out:
1064         kwboot_printv("\n");
1065         return rc;
1066 }
1067
1068 static int
1069 kwboot_xmodem(int tty, const void *_img, size_t size, int baudrate)
1070 {
1071         const uint8_t *img = _img;
1072         int rc, pnum;
1073         size_t hdrsz;
1074
1075         hdrsz = kwbheader_size(img);
1076
1077         /*
1078          * If header size is not aligned to xmodem block size (which applies
1079          * for all images in kwbimage v0 format) then we have to ensure that
1080          * the last xmodem block of header contains beginning of the data
1081          * followed by the header. So align header size to xmodem block size.
1082          */
1083         hdrsz += (KWBOOT_XM_BLKSZ - hdrsz % KWBOOT_XM_BLKSZ) % KWBOOT_XM_BLKSZ;
1084
1085         kwboot_printv("Waiting %d ms and flushing tty\n", blk_rsp_timeo);
1086         usleep(blk_rsp_timeo * 1000);
1087         tcflush(tty, TCIOFLUSH);
1088
1089         pnum = 1;
1090
1091         rc = kwboot_xmodem_one(tty, &pnum, 1, img, hdrsz, baudrate);
1092         if (rc)
1093                 return rc;
1094
1095         /*
1096          * If we have already sent image data as a part of the last
1097          * xmodem header block then we have nothing more to send.
1098          */
1099         if (hdrsz < size) {
1100                 img += hdrsz;
1101                 size -= hdrsz;
1102                 rc = kwboot_xmodem_one(tty, &pnum, 0, img, size, 0);
1103                 if (rc)
1104                         return rc;
1105         }
1106
1107         rc = kwboot_xm_finish(tty);
1108         if (rc)
1109                 return rc;
1110
1111         if (baudrate) {
1112                 kwboot_printv("\nChanging baudrate back to 115200 Bd\n\n");
1113                 rc = kwboot_tty_change_baudrate(tty, 115200);
1114                 if (rc)
1115                         return rc;
1116         }
1117
1118         return 0;
1119 }
1120
1121 static int
1122 kwboot_term_pipe(int in, int out, const char *quit, int *s)
1123 {
1124         ssize_t nin;
1125         char _buf[128], *buf = _buf;
1126
1127         nin = read(in, buf, sizeof(_buf));
1128         if (nin <= 0)
1129                 return -1;
1130
1131         if (quit) {
1132                 int i;
1133
1134                 for (i = 0; i < nin; i++) {
1135                         if (*buf == quit[*s]) {
1136                                 (*s)++;
1137                                 if (!quit[*s])
1138                                         return 0;
1139                                 buf++;
1140                                 nin--;
1141                         } else {
1142                                 if (kwboot_write(out, quit, *s) < 0)
1143                                         return -1;
1144                                 *s = 0;
1145                         }
1146                 }
1147         }
1148
1149         if (kwboot_write(out, buf, nin) < 0)
1150                 return -1;
1151
1152         return 0;
1153 }
1154
1155 static int
1156 kwboot_terminal(int tty)
1157 {
1158         int rc, in, s;
1159         const char *quit = "\34c";
1160         struct termios otio, tio;
1161
1162         rc = -1;
1163
1164         in = STDIN_FILENO;
1165         if (isatty(in)) {
1166                 rc = tcgetattr(in, &otio);
1167                 if (!rc) {
1168                         tio = otio;
1169                         cfmakeraw(&tio);
1170                         rc = tcsetattr(in, TCSANOW, &tio);
1171                 }
1172                 if (rc) {
1173                         perror("tcsetattr");
1174                         goto out;
1175                 }
1176
1177                 kwboot_printv("[Type Ctrl-%c + %c to quit]\r\n",
1178                               quit[0] | 0100, quit[1]);
1179         } else
1180                 in = -1;
1181
1182         rc = 0;
1183         s = 0;
1184
1185         do {
1186                 fd_set rfds;
1187                 int nfds = 0;
1188
1189                 FD_ZERO(&rfds);
1190                 FD_SET(tty, &rfds);
1191                 nfds = nfds < tty ? tty : nfds;
1192
1193                 if (in >= 0) {
1194                         FD_SET(in, &rfds);
1195                         nfds = nfds < in ? in : nfds;
1196                 }
1197
1198                 nfds = select(nfds + 1, &rfds, NULL, NULL, NULL);
1199                 if (nfds < 0)
1200                         break;
1201
1202                 if (FD_ISSET(tty, &rfds)) {
1203                         rc = kwboot_term_pipe(tty, STDOUT_FILENO, NULL, NULL);
1204                         if (rc)
1205                                 break;
1206                 }
1207
1208                 if (in >= 0 && FD_ISSET(in, &rfds)) {
1209                         rc = kwboot_term_pipe(in, tty, quit, &s);
1210                         if (rc)
1211                                 break;
1212                 }
1213         } while (quit[s] != 0);
1214
1215         if (in >= 0)
1216                 tcsetattr(in, TCSANOW, &otio);
1217         printf("\n");
1218 out:
1219         return rc;
1220 }
1221
1222 static void *
1223 kwboot_read_image(const char *path, size_t *size, size_t reserve)
1224 {
1225         int rc, fd;
1226         struct stat st;
1227         void *img;
1228         off_t tot;
1229
1230         rc = -1;
1231         img = NULL;
1232
1233         fd = open(path, O_RDONLY);
1234         if (fd < 0)
1235                 goto out;
1236
1237         rc = fstat(fd, &st);
1238         if (rc)
1239                 goto out;
1240
1241         img = malloc(st.st_size + reserve);
1242         if (!img)
1243                 goto out;
1244
1245         tot = 0;
1246         while (tot < st.st_size) {
1247                 ssize_t rd = read(fd, img + tot, st.st_size - tot);
1248
1249                 if (rd < 0)
1250                         goto out;
1251
1252                 tot += rd;
1253
1254                 if (!rd && tot < st.st_size) {
1255                         errno = EIO;
1256                         goto out;
1257                 }
1258         }
1259
1260         rc = 0;
1261         *size = st.st_size;
1262 out:
1263         if (rc && img) {
1264                 free(img);
1265                 img = NULL;
1266         }
1267         if (fd >= 0)
1268                 close(fd);
1269
1270         return img;
1271 }
1272
1273 static uint8_t
1274 kwboot_hdr_csum8(const void *hdr)
1275 {
1276         const uint8_t *data = hdr;
1277         uint8_t csum;
1278         size_t size;
1279
1280         size = kwbheader_size_for_csum(hdr);
1281
1282         for (csum = 0; size-- > 0; data++)
1283                 csum += *data;
1284
1285         return csum;
1286 }
1287
1288 static uint32_t *
1289 kwboot_img_csum32_ptr(void *img)
1290 {
1291         struct main_hdr_v1 *hdr = img;
1292         uint32_t datasz;
1293
1294         datasz = le32_to_cpu(hdr->blocksize) - sizeof(uint32_t);
1295
1296         return img + le32_to_cpu(hdr->srcaddr) + datasz;
1297 }
1298
1299 static uint32_t
1300 kwboot_img_csum32(const void *img)
1301 {
1302         const struct main_hdr_v1 *hdr = img;
1303         uint32_t datasz, csum = 0;
1304         const uint32_t *data;
1305
1306         datasz = le32_to_cpu(hdr->blocksize) - sizeof(csum);
1307         if (datasz % sizeof(uint32_t))
1308                 return 0;
1309
1310         data = img + le32_to_cpu(hdr->srcaddr);
1311         while (datasz > 0) {
1312                 csum += le32_to_cpu(*data++);
1313                 datasz -= 4;
1314         }
1315
1316         return cpu_to_le32(csum);
1317 }
1318
1319 static int
1320 kwboot_img_is_secure(void *img)
1321 {
1322         struct opt_hdr_v1 *ohdr;
1323
1324         for_each_opt_hdr_v1 (ohdr, img)
1325                 if (ohdr->headertype == OPT_HDR_V1_SECURE_TYPE)
1326                         return 1;
1327
1328         return 0;
1329 }
1330
1331 static void *
1332 kwboot_img_grow_data_right(void *img, size_t *size, size_t grow)
1333 {
1334         struct main_hdr_v1 *hdr = img;
1335         void *result;
1336
1337         /*
1338          * 32-bit checksum comes after end of image code, so we will be putting
1339          * new code there. So we get this pointer and then increase data size
1340          * (since increasing data size changes kwboot_img_csum32_ptr() return
1341          *  value).
1342          */
1343         result = kwboot_img_csum32_ptr(img);
1344         hdr->blocksize = cpu_to_le32(le32_to_cpu(hdr->blocksize) + grow);
1345         *size += grow;
1346
1347         return result;
1348 }
1349
1350 static void
1351 kwboot_img_grow_hdr(void *img, size_t *size, size_t grow)
1352 {
1353         uint32_t hdrsz, datasz, srcaddr;
1354         struct main_hdr_v1 *hdr = img;
1355         struct opt_hdr_v1 *ohdr;
1356         uint8_t *data;
1357
1358         srcaddr = le32_to_cpu(hdr->srcaddr);
1359
1360         /* calculate real used space in kwbimage header */
1361         if (kwbimage_version(img) == 0) {
1362                 hdrsz = kwbheader_size(img);
1363         } else {
1364                 hdrsz = sizeof(*hdr);
1365                 for_each_opt_hdr_v1 (ohdr, hdr)
1366                         hdrsz += opt_hdr_v1_size(ohdr);
1367         }
1368
1369         data = (uint8_t *)img + srcaddr;
1370         datasz = *size - srcaddr;
1371
1372         /* only move data if there is not enough space */
1373         if (hdrsz + grow > srcaddr) {
1374                 size_t need = hdrsz + grow - srcaddr;
1375
1376                 /* move data by enough bytes */
1377                 memmove(data + need, data, datasz);
1378
1379                 hdr->srcaddr = cpu_to_le32(srcaddr + need);
1380                 *size += need;
1381         }
1382
1383         if (kwbimage_version(img) == 1) {
1384                 hdrsz += grow;
1385                 if (hdrsz > kwbheader_size(img)) {
1386                         hdr->headersz_msb = hdrsz >> 16;
1387                         hdr->headersz_lsb = cpu_to_le16(hdrsz & 0xffff);
1388                 }
1389         }
1390 }
1391
1392 static void *
1393 kwboot_add_bin_ohdr_v1(void *img, size_t *size, uint32_t binsz)
1394 {
1395         struct main_hdr_v1 *hdr = img;
1396         struct opt_hdr_v1 *ohdr;
1397         uint32_t num_args;
1398         uint32_t offset;
1399         uint32_t ohdrsz;
1400         uint8_t *prev_ext;
1401
1402         if (hdr->ext) {
1403                 for_each_opt_hdr_v1 (ohdr, img)
1404                         if (opt_hdr_v1_next(ohdr) == NULL)
1405                                 break;
1406
1407                 prev_ext = opt_hdr_v1_ext(ohdr);
1408                 ohdr = _opt_hdr_v1_next(ohdr);
1409         } else {
1410                 ohdr = (void *)(hdr + 1);
1411                 prev_ext = &hdr->ext;
1412         }
1413
1414         /*
1415          * ARM executable code inside the BIN header on some mvebu platforms
1416          * (e.g. A370, AXP) must always be aligned with the 128-bit boundary.
1417          * This requirement can be met by inserting dummy arguments into
1418          * BIN header, if needed.
1419          */
1420         offset = &ohdr->data[4] - (char *)img;
1421         num_args = ((16 - offset % 16) % 16) / sizeof(uint32_t);
1422
1423         ohdrsz = sizeof(*ohdr) + 4 + 4 * num_args + binsz + 4;
1424         kwboot_img_grow_hdr(hdr, size, ohdrsz);
1425
1426         *prev_ext = 1;
1427
1428         ohdr->headertype = OPT_HDR_V1_BINARY_TYPE;
1429         ohdr->headersz_msb = ohdrsz >> 16;
1430         ohdr->headersz_lsb = cpu_to_le16(ohdrsz & 0xffff);
1431
1432         memset(&ohdr->data[0], 0, ohdrsz - sizeof(*ohdr));
1433         *(uint32_t *)&ohdr->data[0] = cpu_to_le32(num_args);
1434
1435         return &ohdr->data[4 + 4 * num_args];
1436 }
1437
1438 static void
1439 _inject_baudrate_change_code(void *img, size_t *size, int for_data,
1440                              int old_baud, int new_baud)
1441 {
1442         struct main_hdr_v1 *hdr = img;
1443         uint32_t orig_datasz;
1444         uint32_t codesz;
1445         uint8_t *code;
1446
1447         if (for_data) {
1448                 orig_datasz = le32_to_cpu(hdr->blocksize) - sizeof(uint32_t);
1449
1450                 codesz = sizeof(kwboot_baud_code) +
1451                          sizeof(kwboot_baud_code_data_jump);
1452                 code = kwboot_img_grow_data_right(img, size, codesz);
1453         } else {
1454                 codesz = sizeof(kwboot_baud_code_binhdr_pre) +
1455                          sizeof(kwboot_baud_code) +
1456                          sizeof(kwboot_baud_code_binhdr_post);
1457                 code = kwboot_add_bin_ohdr_v1(img, size, codesz);
1458
1459                 codesz = sizeof(kwboot_baud_code_binhdr_pre);
1460                 memcpy(code, kwboot_baud_code_binhdr_pre, codesz);
1461                 code += codesz;
1462         }
1463
1464         codesz = sizeof(kwboot_baud_code) - 2 * sizeof(uint32_t);
1465         memcpy(code, kwboot_baud_code, codesz);
1466         code += codesz;
1467         *(uint32_t *)code = cpu_to_le32(old_baud);
1468         code += sizeof(uint32_t);
1469         *(uint32_t *)code = cpu_to_le32(new_baud);
1470         code += sizeof(uint32_t);
1471
1472         if (for_data) {
1473                 codesz = sizeof(kwboot_baud_code_data_jump) - sizeof(uint32_t);
1474                 memcpy(code, kwboot_baud_code_data_jump, codesz);
1475                 code += codesz;
1476                 *(uint32_t *)code = hdr->execaddr;
1477                 code += sizeof(uint32_t);
1478                 hdr->execaddr = cpu_to_le32(le32_to_cpu(hdr->destaddr) + orig_datasz);
1479         } else {
1480                 codesz = sizeof(kwboot_baud_code_binhdr_post);
1481                 memcpy(code, kwboot_baud_code_binhdr_post, codesz);
1482                 code += codesz;
1483         }
1484 }
1485
1486 static int
1487 kwboot_img_patch(void *img, size_t *size, int baudrate)
1488 {
1489         struct main_hdr_v1 *hdr;
1490         uint32_t srcaddr;
1491         uint8_t csum;
1492         size_t hdrsz;
1493         int image_ver;
1494         int is_secure;
1495
1496         hdr = img;
1497
1498         if (*size < sizeof(struct main_hdr_v1))
1499                 goto err;
1500
1501         image_ver = kwbimage_version(img);
1502         if (image_ver != 0 && image_ver != 1) {
1503                 fprintf(stderr, "Invalid image header version\n");
1504                 goto err;
1505         }
1506
1507         hdrsz = kwbheader_size(hdr);
1508
1509         if (*size < hdrsz)
1510                 goto err;
1511
1512         csum = kwboot_hdr_csum8(hdr) - hdr->checksum;
1513         if (csum != hdr->checksum)
1514                 goto err;
1515
1516         srcaddr = le32_to_cpu(hdr->srcaddr);
1517
1518         switch (hdr->blockid) {
1519         case IBR_HDR_SATA_ID:
1520                 if (srcaddr < 1)
1521                         goto err;
1522
1523                 hdr->srcaddr = cpu_to_le32((srcaddr - 1) * 512);
1524                 break;
1525
1526         case IBR_HDR_SDIO_ID:
1527                 hdr->srcaddr = cpu_to_le32(srcaddr * 512);
1528                 break;
1529
1530         case IBR_HDR_PEX_ID:
1531                 if (srcaddr == 0xFFFFFFFF)
1532                         hdr->srcaddr = cpu_to_le32(hdrsz);
1533                 break;
1534
1535         case IBR_HDR_SPI_ID:
1536                 if (hdr->destaddr == cpu_to_le32(0xFFFFFFFF)) {
1537                         kwboot_printv("Patching destination and execution addresses from SPI/NOR XIP area to DDR area 0x00800000\n");
1538                         hdr->destaddr = cpu_to_le32(0x00800000);
1539                         hdr->execaddr = cpu_to_le32(0x00800000);
1540                 }
1541                 break;
1542         }
1543
1544         if (hdrsz > le32_to_cpu(hdr->srcaddr) ||
1545             *size < le32_to_cpu(hdr->srcaddr) + le32_to_cpu(hdr->blocksize))
1546                 goto err;
1547
1548         if (kwboot_img_csum32(img) != *kwboot_img_csum32_ptr(img))
1549                 goto err;
1550
1551         is_secure = kwboot_img_is_secure(img);
1552
1553         if (hdr->blockid != IBR_HDR_UART_ID) {
1554                 if (is_secure) {
1555                         fprintf(stderr,
1556                                 "Image has secure header with signature for non-UART booting\n");
1557                         goto err;
1558                 }
1559
1560                 kwboot_printv("Patching image boot signature to UART\n");
1561                 hdr->blockid = IBR_HDR_UART_ID;
1562         }
1563
1564         if (!is_secure) {
1565                 if (image_ver == 1) {
1566                         /*
1567                          * Tell BootROM to send BootROM messages to UART port
1568                          * number 0 (used also for UART booting) with default
1569                          * baudrate (which should be 115200) and do not touch
1570                          * UART MPP configuration.
1571                          */
1572                         hdr->options &= ~0x1F;
1573                         hdr->options |= MAIN_HDR_V1_OPT_BAUD_DEFAULT;
1574                         hdr->options |= 0 << 3;
1575                 }
1576                 if (image_ver == 0)
1577                         ((struct main_hdr_v0 *)img)->nandeccmode = IBR_HDR_ECC_DISABLED;
1578                 hdr->nandpagesize = 0;
1579         }
1580
1581         if (baudrate) {
1582                 if (image_ver == 0) {
1583                         fprintf(stderr,
1584                                 "Cannot inject code for changing baudrate into v0 image header\n");
1585                         goto err;
1586                 }
1587
1588                 if (is_secure) {
1589                         fprintf(stderr,
1590                                 "Cannot inject code for changing baudrate into image with secure header\n");
1591                         goto err;
1592                 }
1593
1594                 /*
1595                  * First inject code that changes the baudrate from the default
1596                  * value of 115200 Bd to requested value. This code is inserted
1597                  * as a new opt hdr, so it is executed by BootROM after the
1598                  * header part is received.
1599                  */
1600                 kwboot_printv("Injecting binary header code for changing baudrate to %d Bd\n",
1601                               baudrate);
1602                 _inject_baudrate_change_code(img, size, 0, 115200, baudrate);
1603
1604                 /*
1605                  * Now inject code that changes the baudrate back to 115200 Bd.
1606                  * This code is appended after the data part of the image, and
1607                  * execaddr is changed so that it is executed before U-Boot
1608                  * proper.
1609                  */
1610                 kwboot_printv("Injecting code for changing baudrate back\n");
1611                 _inject_baudrate_change_code(img, size, 1, baudrate, 115200);
1612
1613                 /* Update the 32-bit data checksum */
1614                 *kwboot_img_csum32_ptr(img) = kwboot_img_csum32(img);
1615
1616                 /* recompute header size */
1617                 hdrsz = kwbheader_size(hdr);
1618         }
1619
1620         if (hdrsz % KWBOOT_XM_BLKSZ) {
1621                 size_t grow = KWBOOT_XM_BLKSZ - hdrsz % KWBOOT_XM_BLKSZ;
1622
1623                 if (is_secure) {
1624                         fprintf(stderr, "Cannot align image with secure header\n");
1625                         goto err;
1626                 }
1627
1628                 kwboot_printv("Aligning image header to Xmodem block size\n");
1629                 kwboot_img_grow_hdr(img, size, grow);
1630         }
1631
1632         hdr->checksum = kwboot_hdr_csum8(hdr) - csum;
1633
1634         *size = le32_to_cpu(hdr->srcaddr) + le32_to_cpu(hdr->blocksize);
1635         return 0;
1636 err:
1637         errno = EINVAL;
1638         return -1;
1639 }
1640
1641 static void
1642 kwboot_usage(FILE *stream, char *progname)
1643 {
1644         fprintf(stream,
1645                 "Usage: %s [OPTIONS] [-b <image> | -D <image> ] [-B <baud> ] <TTY>\n",
1646                 progname);
1647         fprintf(stream, "\n");
1648         fprintf(stream,
1649                 "  -b <image>: boot <image> with preamble (Kirkwood, Armada 370/XP)\n");
1650         fprintf(stream,
1651                 "  -D <image>: boot <image> without preamble (Dove)\n");
1652         fprintf(stream, "  -d: enter debug mode\n");
1653         fprintf(stream, "  -a: use timings for Armada XP\n");
1654         fprintf(stream, "  -q <req-delay>:  use specific request-delay\n");
1655         fprintf(stream, "  -s <resp-timeo>: use specific response-timeout\n");
1656         fprintf(stream,
1657                 "  -o <block-timeo>: use specific xmodem block timeout\n");
1658         fprintf(stream, "\n");
1659         fprintf(stream, "  -t: mini terminal\n");
1660         fprintf(stream, "\n");
1661         fprintf(stream, "  -B <baud>: set baud rate\n");
1662         fprintf(stream, "\n");
1663 }
1664
1665 int
1666 main(int argc, char **argv)
1667 {
1668         const char *ttypath, *imgpath;
1669         int rv, rc, tty, term;
1670         void *bootmsg;
1671         void *debugmsg;
1672         void *img;
1673         size_t size;
1674         size_t after_img_rsv;
1675         int baudrate;
1676
1677         rv = 1;
1678         tty = -1;
1679         bootmsg = NULL;
1680         debugmsg = NULL;
1681         imgpath = NULL;
1682         img = NULL;
1683         term = 0;
1684         size = 0;
1685         after_img_rsv = KWBOOT_XM_BLKSZ;
1686         baudrate = 115200;
1687
1688         printf("kwboot version %s\n", PLAIN_VERSION);
1689
1690         kwboot_verbose = isatty(STDOUT_FILENO);
1691
1692         do {
1693                 int c = getopt(argc, argv, "hb:ptaB:dD:q:s:o:");
1694                 if (c < 0)
1695                         break;
1696
1697                 switch (c) {
1698                 case 'b':
1699                         bootmsg = kwboot_msg_boot;
1700                         imgpath = optarg;
1701                         break;
1702
1703                 case 'D':
1704                         bootmsg = NULL;
1705                         imgpath = optarg;
1706                         break;
1707
1708                 case 'd':
1709                         debugmsg = kwboot_msg_debug;
1710                         break;
1711
1712                 case 'p':
1713                         /* nop, for backward compatibility */
1714                         break;
1715
1716                 case 't':
1717                         term = 1;
1718                         break;
1719
1720                 case 'a':
1721                         msg_req_delay = KWBOOT_MSG_REQ_DELAY_AXP;
1722                         msg_rsp_timeo = KWBOOT_MSG_RSP_TIMEO_AXP;
1723                         break;
1724
1725                 case 'q':
1726                         msg_req_delay = atoi(optarg);
1727                         break;
1728
1729                 case 's':
1730                         msg_rsp_timeo = atoi(optarg);
1731                         break;
1732
1733                 case 'o':
1734                         blk_rsp_timeo = atoi(optarg);
1735                         break;
1736
1737                 case 'B':
1738                         baudrate = atoi(optarg);
1739                         break;
1740
1741                 case 'h':
1742                         rv = 0;
1743                 default:
1744                         goto usage;
1745                 }
1746         } while (1);
1747
1748         if (!bootmsg && !term && !debugmsg)
1749                 goto usage;
1750
1751         if (argc - optind < 1)
1752                 goto usage;
1753
1754         ttypath = argv[optind++];
1755
1756         tty = kwboot_open_tty(ttypath, imgpath ? 115200 : baudrate);
1757         if (tty < 0) {
1758                 perror(ttypath);
1759                 goto out;
1760         }
1761
1762         if (baudrate == 115200)
1763                 /* do not change baudrate during Xmodem to the same value */
1764                 baudrate = 0;
1765         else
1766                 /* ensure we have enough space for baudrate change code */
1767                 after_img_rsv += sizeof(struct opt_hdr_v1) + 8 + 16 +
1768                                  sizeof(kwboot_baud_code_binhdr_pre) +
1769                                  sizeof(kwboot_baud_code) +
1770                                  sizeof(kwboot_baud_code_binhdr_post) +
1771                                  KWBOOT_XM_BLKSZ +
1772                                  sizeof(kwboot_baud_code) +
1773                                  sizeof(kwboot_baud_code_data_jump) +
1774                                  KWBOOT_XM_BLKSZ;
1775
1776         if (imgpath) {
1777                 img = kwboot_read_image(imgpath, &size, after_img_rsv);
1778                 if (!img) {
1779                         perror(imgpath);
1780                         goto out;
1781                 }
1782
1783                 rc = kwboot_img_patch(img, &size, baudrate);
1784                 if (rc) {
1785                         fprintf(stderr, "%s: Invalid image.\n", imgpath);
1786                         goto out;
1787                 }
1788         }
1789
1790         if (debugmsg) {
1791                 rc = kwboot_debugmsg(tty, debugmsg);
1792                 if (rc) {
1793                         perror("debugmsg");
1794                         goto out;
1795                 }
1796         } else if (bootmsg) {
1797                 rc = kwboot_bootmsg(tty, bootmsg);
1798                 if (rc) {
1799                         perror("bootmsg");
1800                         goto out;
1801                 }
1802         }
1803
1804         if (img) {
1805                 rc = kwboot_xmodem(tty, img, size, baudrate);
1806                 if (rc) {
1807                         perror("xmodem");
1808                         goto out;
1809                 }
1810         }
1811
1812         if (term) {
1813                 rc = kwboot_terminal(tty);
1814                 if (rc && !(errno == EINTR)) {
1815                         perror("terminal");
1816                         goto out;
1817                 }
1818         }
1819
1820         rv = 0;
1821 out:
1822         if (tty >= 0)
1823                 close(tty);
1824
1825         if (img)
1826                 free(img);
1827
1828         return rv;
1829
1830 usage:
1831         kwboot_usage(rv ? stderr : stdout, basename(argv[0]));
1832         goto out;
1833 }