diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/kwboot.c | 139 |
1 files changed, 123 insertions, 16 deletions
diff --git a/tools/kwboot.c b/tools/kwboot.c index 9fd90b9bec..3ab49e74bb 100644 --- a/tools/kwboot.c +++ b/tools/kwboot.c @@ -881,30 +881,139 @@ kwboot_bootmsg(int tty) static int kwboot_debugmsg(int tty) { - int rc; + unsigned char buf[8192]; + pthread_t write_thread; + int rc, err, i, pos; + size_t off; - kwboot_printv("Sending debug message. Please reboot the target..."); + /* flush input and output queue */ + tcflush(tty, TCIOFLUSH); - do { - char buf[16]; + rc = kwboot_msg_start_thread(&write_thread, &tty, kwboot_msg_debug); + if (rc) { + perror("Failed to start write thread"); + return rc; + } - rc = tcflush(tty, TCIOFLUSH); - if (rc) - break; + kwboot_printv("Sending debug message. Please reboot the target..."); + kwboot_spinner(); - rc = kwboot_tty_send(tty, kwboot_msg_debug, sizeof(kwboot_msg_debug), 0); - if (rc) + err = 0; + off = 0; + while (1) { + /* Read immediately all bytes in queue without waiting */ + rc = read(tty, buf + off, sizeof(buf) - off); + if ((rc < 0 && errno == EINTR) || rc == 0) { + continue; + } else if (rc < 0) { + err = errno; break; - - rc = kwboot_tty_recv(tty, buf, 16, msg_rsp_timeo); + } + off += rc - 1; kwboot_spinner(); - } while (rc); + /* + * Check if we received at least 4 debug message patterns + * (console echo from BootROM) in cyclic buffer + */ + + for (pos = 0; pos < sizeof(kwboot_msg_debug); pos++) + if (buf[off] == kwboot_msg_debug[(pos + off) % sizeof(kwboot_msg_debug)]) + break; + + for (i = off; i >= 0; i--) + if (buf[i] != kwboot_msg_debug[(pos + i) % sizeof(kwboot_msg_debug)]) + break; + + off -= i; + + if (off >= 4 * sizeof(kwboot_msg_debug)) + break; + + /* If not move valid suffix from end of the buffer to the beginning of buffer */ + memmove(buf, buf + i + 1, off); + } kwboot_printv("\n"); - return rc; + rc = kwboot_msg_stop_thread(write_thread); + if (rc) { + perror("Failed to stop write thread"); + return rc; + } + + if (err) { + errno = err; + perror("Failed to read response for debug message pattern"); + return -1; + } + + /* flush output queue with remaining debug message patterns */ + rc = tcflush(tty, TCOFLUSH); + if (rc) { + perror("Failed to flush output queue"); + return rc; + } + + kwboot_printv("Clearing input buffer...\n"); + + /* + * Wait until BootROM transmit all remaining echo characters. + * Experimentally it was measured that for Armada 385 BootROM + * it is required to wait at least 0.415s. So wait 0.5s. + */ + usleep(500 * 1000); + + /* + * In off variable is stored number of characters received after the + * successful detection of echo reply. So these characters are console + * echo for other following debug message patterns. BootROM may have in + * its output queue other echo characters which were being transmitting + * before above sleep call. So read remaining number of echo characters + * sent by the BootROM now. + */ + while ((rc = kwboot_tty_recv(tty, &buf[0], 1, 0)) == 0) + off++; + if (errno != ETIMEDOUT) { + perror("Failed to read response"); + return rc; + } + + /* + * Clear every echo character set by the BootROM by backspace byte. + * This is required prior writing any command to the BootROM debug + * because BootROM command line buffer has limited size. If length + * of the command is larger than buffer size then it looks like + * that Armada 385 BootROM crashes after sending ENTER. So erase it. + * Experimentally it was measured that for Armada 385 BootROM it is + * required to send at least 3 backspace bytes for one echo character. + * This is unknown why. But lets do it. + */ + off *= 3; + memset(buf, '\x08', sizeof(buf)); + while (off > sizeof(buf)) { + rc = kwboot_tty_send(tty, buf, sizeof(buf), 1); + if (rc) { + perror("Failed to send clear sequence"); + return rc; + } + off -= sizeof(buf); + } + rc = kwboot_tty_send(tty, buf, off, 0); + if (rc) { + perror("Failed to send clear sequence"); + return rc; + } + + usleep(msg_rsp_timeo * 1000); + rc = tcflush(tty, TCIFLUSH); + if (rc) { + perror("Failed to flush input queue"); + return rc; + } + + return 0; } static size_t @@ -1951,10 +2060,8 @@ main(int argc, char **argv) if (debugmsg) { rc = kwboot_debugmsg(tty); - if (rc) { - perror("debugmsg"); + if (rc) goto out; - } } else if (bootmsg) { rc = kwboot_bootmsg(tty); if (rc) |