Author: stefanct Date: Fri Aug 23 23:51:32 2013 New Revision: 1717 URL: http://flashrom.org/trac/flashrom/changeset/1717
Log: Introduce serialport_config().
This allows to easily reconfigure a serial port as needed in the Bus Pirate speedup patch.
Signed-off-by: Stefan Tauner stefan.tauner@student.tuwien.ac.at Acked-by: Stefan Tauner stefan.tauner@student.tuwien.ac.at
Modified: trunk/programmer.h trunk/serial.c
Modified: trunk/programmer.h ============================================================================== --- trunk/programmer.h Sun Aug 18 01:58:01 2013 (r1716) +++ trunk/programmer.h Fri Aug 23 23:51:32 2013 (r1717) @@ -660,6 +660,7 @@
void sp_flush_incoming(void); fdtype sp_openserport(char *dev, unsigned int baud); +int serialport_config(fdtype fd, unsigned int baud); void __attribute__((noreturn)) sp_die(char *msg); extern fdtype sp_fd; /* expose serialport_shutdown as it's currently used by buspirate */
Modified: trunk/serial.c ============================================================================== --- trunk/serial.c Sun Aug 18 01:58:01 2013 (r1716) +++ trunk/serial.c Fri Aug 23 23:51:32 2013 (r1717) @@ -158,35 +158,18 @@ #endif }
-fdtype sp_openserport(char *dev, unsigned int baud) +int serialport_config(fdtype fd, unsigned int baud) { -#ifdef _WIN32 - HANDLE fd; - char *dev2 = dev; - if ((strlen(dev) > 3) && - (tolower((unsigned char)dev[0]) == 'c') && - (tolower((unsigned char)dev[1]) == 'o') && - (tolower((unsigned char)dev[2]) == 'm')) { - dev2 = malloc(strlen(dev) + 5); - if (!dev2) { - msg_perr_strerror("Out of memory: "); - return SER_INV_FD; - } - strcpy(dev2, "\\.\"); - strcpy(dev2 + 4, dev); - } - fd = CreateFile(dev2, GENERIC_READ | GENERIC_WRITE, 0, NULL, - OPEN_EXISTING, 0, NULL); - if (dev2 != dev) - free(dev2); - if (fd == INVALID_HANDLE_VALUE) { - msg_perr_strerror("Cannot open serial port: "); - return SER_INV_FD; + if (fd == SER_INV_FD) { + msg_perr("%s: File descriptor is invalid.\n", __func__); + return 1; } + +#ifdef _WIN32 DCB dcb; if (!GetCommState(fd, &dcb)) { msg_perr_strerror("Could not fetch original serial port configuration: "); - goto out_close; + return 1; } const struct baudentry *entry = round_baud(baud); dcb.BaudRate = entry->flag; @@ -195,35 +178,25 @@ dcb.StopBits = ONESTOPBIT; if (!SetCommState(fd, &dcb)) { msg_perr_strerror("Could not change serial port configuration: "); - goto out_close; + return 1; } if (!GetCommState(fd, &dcb)) { msg_perr_strerror("Could not fetch new serial port configuration: "); - goto out_close; + return 1; } msg_pdbg("Baud rate is %ld.\n", dcb.BaudRate); - return fd; -out_close: - CloseHandle(sp_fd); - return SER_INV_FD; #else struct termios wanted, observed; - int fd; - fd = open(dev, O_RDWR | O_NOCTTY | O_NDELAY); - if (fd < 0) { - msg_perr_strerror("Cannot open serial port: "); - return SER_INV_FD; - } fcntl(fd, F_SETFL, 0); if (tcgetattr(fd, &observed) != 0) { msg_perr_strerror("Could not fetch original serial port configuration: "); - goto out_close; + return 1; } wanted = observed; const struct baudentry *entry = round_baud(baud); if (cfsetispeed(&wanted, entry->flag) != 0 || cfsetospeed(&wanted, entry->flag) != 0) { msg_perr_strerror("Could not set serial baud rate: "); - goto out_close; + return 1; } wanted.c_cflag &= ~(PARENB | CSTOPB | CSIZE | CRTSCTS); wanted.c_cflag |= (CS8 | CLOCAL | CREAD); @@ -232,11 +205,11 @@ wanted.c_oflag &= ~OPOST; if (tcsetattr(fd, TCSANOW, &wanted) != 0) { msg_perr_strerror("Could not change serial port configuration: "); - goto out_close; + return 1; } if (tcgetattr(fd, &observed) != 0) { msg_perr_strerror("Could not fetch new serial port configuration: "); - goto out_close; + return 1; } if (observed.c_cflag != wanted.c_cflag || observed.c_lflag != wanted.c_lflag || @@ -244,14 +217,54 @@ observed.c_oflag != wanted.c_oflag || cfgetispeed(&observed) != cfgetispeed(&wanted)) { msg_perr("%s: Some requested options did not stick.\n", __func__); - goto out_close; + return 1; } - msg_pdbg("Baud rate is %d.\n", entry->baud); - return fd; + msg_pdbg("Baud rate is %d now.\n", entry->baud); +#endif + return 0; +}
-out_close: - close(sp_fd); - return SER_INV_FD; +fdtype sp_openserport(char *dev, unsigned int baud) +{ + fdtype fd; +#ifdef _WIN32 + char *dev2 = dev; + if ((strlen(dev) > 3) && + (tolower((unsigned char)dev[0]) == 'c') && + (tolower((unsigned char)dev[1]) == 'o') && + (tolower((unsigned char)dev[2]) == 'm')) { + dev2 = malloc(strlen(dev) + 5); + if (!dev2) { + msg_perr_strerror("Out of memory: "); + return SER_INV_FD; + } + strcpy(dev2, "\\.\"); + strcpy(dev2 + 4, dev); + } + fd = CreateFile(dev2, GENERIC_READ | GENERIC_WRITE, 0, NULL, + OPEN_EXISTING, 0, NULL); + if (dev2 != dev) + free(dev2); + if (fd == INVALID_HANDLE_VALUE) { + msg_perr_strerror("Cannot open serial port: "); + return SER_INV_FD; + } + if (serialport_config(fd, baud) != 0) { + CloseHandle(fd); + return SER_INV_FD; + } + return fd; +#else + fd = open(dev, O_RDWR | O_NOCTTY | O_NDELAY); + if (fd < 0) { + msg_perr_strerror("Cannot open serial port: "); + return SER_INV_FD; + } + if (serialport_config(fd, baud) != 0) { + close(fd); + return SER_INV_FD; + } + return fd; #endif }
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