| Tom Rini | 83d290c | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| wdenk | 6dd652f | 2003-06-19 23:40:20 +0000 | [diff] [blame] | 2 | /* |
| 3 | * (C) Copyright 2000 |
| 4 | * Murray Jensen <Murray.Jensen@csiro.au> |
| wdenk | 6dd652f | 2003-06-19 23:40:20 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| wdenk | bca52d6 | 2001-10-15 12:12:42 +0000 | [diff] [blame] | 7 | #include <unistd.h> |
| 8 | #include <string.h> |
| 9 | #include <fcntl.h> |
| 10 | #include <sys/time.h> |
| 11 | #include "serial.h" |
| 12 | |
| 13 | #if defined(__sun__) || \ |
| 14 | defined(__OpenBSD__) || \ |
| 15 | defined(__FreeBSD__) || \ |
| 16 | defined(__NetBSD__) || \ |
| 17 | defined(__APPLE__) |
| 18 | static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, { 0 } }; |
| 19 | #else |
| 20 | static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, 0 }; |
| 21 | #endif |
| 22 | |
| 23 | static struct speedmap { |
| 24 | char *str; |
| 25 | speed_t val; |
| 26 | } speedmap[] = { |
| 27 | { "50", B50 }, { "75", B75 }, { "110", B110 }, |
| 28 | { "134", B134 }, { "150", B150 }, { "200", B200 }, |
| 29 | { "300", B300 }, { "600", B600 }, { "1200", B1200 }, |
| 30 | { "1800", B1800 }, { "2400", B2400 }, { "4800", B4800 }, |
| 31 | { "9600", B9600 }, { "19200", B19200 }, { "38400", B38400 }, |
| 32 | { "57600", B57600 }, |
| 33 | #ifdef B76800 |
| 34 | { "76800", B76800 }, |
| 35 | #endif |
| 36 | { "115200", B115200 }, |
| 37 | #ifdef B153600 |
| 38 | { "153600", B153600 }, |
| 39 | #endif |
| 40 | { "230400", B230400 }, |
| 41 | #ifdef B307200 |
| 42 | { "307200", B307200 }, |
| 43 | #endif |
| 44 | #ifdef B460800 |
| 45 | { "460800", B460800 } |
| 46 | #endif |
| 47 | }; |
| 48 | static int nspeeds = sizeof speedmap / sizeof speedmap[0]; |
| 49 | |
| 50 | speed_t |
| 51 | cvtspeed(char *str) |
| 52 | { |
| 53 | struct speedmap *smp = speedmap, *esmp = &speedmap[nspeeds]; |
| 54 | |
| 55 | while (smp < esmp) { |
| 56 | if (strcmp(str, smp->str) == 0) |
| 57 | return (smp->val); |
| 58 | smp++; |
| 59 | } |
| 60 | return B0; |
| 61 | } |
| 62 | |
| 63 | int |
| 64 | serialopen(char *device, speed_t speed) |
| 65 | { |
| 66 | int fd; |
| 67 | |
| 68 | if (cfsetospeed(&tios, speed) < 0) |
| 69 | return -1; |
| 70 | |
| 71 | if ((fd = open(device, O_RDWR)) < 0) |
| 72 | return -1; |
| 73 | |
| 74 | if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { |
| 75 | (void)close(fd); |
| 76 | return -1; |
| 77 | } |
| 78 | |
| 79 | return fd; |
| 80 | } |
| 81 | |
| 82 | int |
| 83 | serialreadchar(int fd, int timeout) |
| 84 | { |
| 85 | fd_set fds; |
| 86 | struct timeval tv; |
| 87 | int n; |
| 88 | char ch; |
| 89 | |
| 90 | tv.tv_sec = timeout; |
| 91 | tv.tv_usec = 0; |
| 92 | |
| 93 | FD_ZERO(&fds); |
| 94 | FD_SET(fd, &fds); |
| 95 | |
| 96 | /* this is a fucking horrible quick hack - fix this */ |
| 97 | |
| 98 | if ((n = select(fd + 1, &fds, 0, 0, &tv)) < 0) |
| 99 | return SERIAL_ERROR; |
| 100 | |
| 101 | if (n == 0) |
| 102 | return SERIAL_TIMEOUT; |
| 103 | |
| 104 | if ((n = read(fd, &ch, 1)) < 0) |
| 105 | return SERIAL_ERROR; |
| 106 | |
| 107 | if (n == 0) |
| 108 | return SERIAL_EOF; |
| 109 | |
| 110 | return ch; |
| 111 | } |
| 112 | |
| 113 | int |
| 114 | serialwrite(int fd, char *buf, int len) |
| 115 | { |
| 116 | int n; |
| 117 | |
| 118 | do { |
| 119 | n = write(fd, buf, len); |
| 120 | if (n < 0) |
| 121 | return 1; |
| 122 | len -= n; |
| 123 | buf += n; |
| 124 | } while (len > 0); |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | int |
| 129 | serialclose(int fd) |
| 130 | { |
| 131 | return close(fd); |
| 132 | } |