1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * setserial implementation for busybox
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4 | *
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5 | *
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6 | * Copyright (C) 2011 Marek Bečka <yuen@klacno.sk>
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7 | *
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8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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9 | */
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10 |
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11 | //config:config SETSERIAL
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12 | //config: bool "setserial"
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13 | //config: default y
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14 | //config: select PLATFORM_LINUX
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15 | //config: help
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16 | //config: Retrieve or set Linux serial port.
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17 |
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18 | //applet:IF_SETSERIAL(APPLET(setserial, BB_DIR_BIN, BB_SUID_DROP))
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19 |
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20 | //kbuild:lib-$(CONFIG_SETSERIAL) += setserial.o
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21 |
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22 | #include "libbb.h"
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23 | #include <assert.h>
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24 |
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25 | #ifndef PORT_UNKNOWN
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26 | # define PORT_UNKNOWN 0
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27 | #endif
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28 | #ifndef PORT_8250
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29 | # define PORT_8250 1
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30 | #endif
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31 | #ifndef PORT_16450
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32 | # define PORT_16450 2
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33 | #endif
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34 | #ifndef PORT_16550
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35 | # define PORT_16550 3
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36 | #endif
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37 | #ifndef PORT_16550A
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38 | # define PORT_16550A 4
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39 | #endif
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40 | #ifndef PORT_CIRRUS
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41 | # define PORT_CIRRUS 5
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42 | #endif
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43 | #ifndef PORT_16650
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44 | # define PORT_16650 6
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45 | #endif
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46 | #ifndef PORT_16650V2
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47 | # define PORT_16650V2 7
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48 | #endif
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49 | #ifndef PORT_16750
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50 | # define PORT_16750 8
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51 | #endif
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52 | #ifndef PORT_STARTECH
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53 | # define PORT_STARTECH 9
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54 | #endif
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55 | #ifndef PORT_16C950
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56 | # define PORT_16C950 10
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57 | #endif
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58 | #ifndef PORT_16654
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59 | # define PORT_16654 11
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60 | #endif
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61 | #ifndef PORT_16850
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62 | # define PORT_16850 12
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63 | #endif
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64 | #ifndef PORT_RSA
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65 | # define PORT_RSA 13
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66 | #endif
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67 | #ifndef PORT_NS16550A
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68 | # define PORT_NS16550A 14
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69 | #endif
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70 | #ifndef PORT_XSCALE
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71 | # define PORT_XSCALE 15
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72 | #endif
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73 | #ifndef PORT_RM9000
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74 | # define PORT_RM9000 16
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75 | #endif
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76 | #ifndef PORT_OCTEON
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77 | # define PORT_OCTEON 17
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78 | #endif
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79 | #ifndef PORT_AR7
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80 | # define PORT_AR7 18
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81 | #endif
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82 | #ifndef PORT_U6_16550A
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83 | # define PORT_U6_16550A 19
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84 | #endif
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85 |
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86 | #ifndef ASYNCB_HUP_NOTIFY
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87 | # define ASYNCB_HUP_NOTIFY 0
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88 | #endif
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89 | #ifndef ASYNCB_FOURPORT
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90 | # define ASYNCB_FOURPORT 1
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91 | #endif
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92 | #ifndef ASYNCB_SAK
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93 | # define ASYNCB_SAK 2
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94 | #endif
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95 | #ifndef ASYNCB_SPLIT_TERMIOS
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96 | # define ASYNCB_SPLIT_TERMIOS 3
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97 | #endif
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98 | #ifndef ASYNCB_SPD_HI
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99 | # define ASYNCB_SPD_HI 4
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100 | #endif
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101 | #ifndef ASYNCB_SPD_VHI
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102 | # define ASYNCB_SPD_VHI 5
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103 | #endif
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104 | #ifndef ASYNCB_SKIP_TEST
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105 | # define ASYNCB_SKIP_TEST 6
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106 | #endif
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107 | #ifndef ASYNCB_AUTO_IRQ
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108 | # define ASYNCB_AUTO_IRQ 7
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109 | #endif
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110 | #ifndef ASYNCB_SESSION_LOCKOUT
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111 | # define ASYNCB_SESSION_LOCKOUT 8
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112 | #endif
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113 | #ifndef ASYNCB_PGRP_LOCKOUT
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114 | # define ASYNCB_PGRP_LOCKOUT 9
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115 | #endif
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116 | #ifndef ASYNCB_CALLOUT_NOHUP
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117 | # define ASYNCB_CALLOUT_NOHUP 10
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118 | #endif
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119 | #ifndef ASYNCB_SPD_SHI
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120 | # define ASYNCB_SPD_SHI 12
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121 | #endif
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122 | #ifndef ASYNCB_LOW_LATENCY
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123 | # define ASYNCB_LOW_LATENCY 13
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124 | #endif
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125 | #ifndef ASYNCB_BUGGY_UART
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126 | # define ASYNCB_BUGGY_UART 14
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127 | #endif
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128 |
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129 | #ifndef ASYNC_HUP_NOTIFY
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130 | # define ASYNC_HUP_NOTIFY (1U << ASYNCB_HUP_NOTIFY)
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131 | #endif
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132 | #ifndef ASYNC_FOURPORT
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133 | # define ASYNC_FOURPORT (1U << ASYNCB_FOURPORT)
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134 | #endif
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135 | #ifndef ASYNC_SAK
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136 | # define ASYNC_SAK (1U << ASYNCB_SAK)
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137 | #endif
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138 | #ifndef ASYNC_SPLIT_TERMIOS
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139 | # define ASYNC_SPLIT_TERMIOS (1U << ASYNCB_SPLIT_TERMIOS)
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140 | #endif
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141 | #ifndef ASYNC_SPD_HI
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142 | # define ASYNC_SPD_HI (1U << ASYNCB_SPD_HI)
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143 | #endif
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144 | #ifndef ASYNC_SPD_VHI
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145 | # define ASYNC_SPD_VHI (1U << ASYNCB_SPD_VHI)
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146 | #endif
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147 | #ifndef ASYNC_SKIP_TEST
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148 | # define ASYNC_SKIP_TEST (1U << ASYNCB_SKIP_TEST)
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149 | #endif
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150 | #ifndef ASYNC_AUTO_IRQ
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151 | # define ASYNC_AUTO_IRQ (1U << ASYNCB_AUTO_IRQ)
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152 | #endif
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153 | #ifndef ASYNC_SESSION_LOCKOUT
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154 | # define ASYNC_SESSION_LOCKOUT (1U << ASYNCB_SESSION_LOCKOUT)
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155 | #endif
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156 | #ifndef ASYNC_PGRP_LOCKOUT
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157 | # define ASYNC_PGRP_LOCKOUT (1U << ASYNCB_PGRP_LOCKOUT)
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158 | #endif
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159 | #ifndef ASYNC_CALLOUT_NOHUP
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160 | # define ASYNC_CALLOUT_NOHUP (1U << ASYNCB_CALLOUT_NOHUP)
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161 | #endif
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162 | #ifndef ASYNC_SPD_SHI
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163 | # define ASYNC_SPD_SHI (1U << ASYNCB_SPD_SHI)
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164 | #endif
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165 | #ifndef ASYNC_LOW_LATENCY
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166 | # define ASYNC_LOW_LATENCY (1U << ASYNCB_LOW_LATENCY)
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167 | #endif
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168 | #ifndef ASYNC_BUGGY_UART
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169 | # define ASYNC_BUGGY_UART (1U << ASYNCB_BUGGY_UART)
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170 | #endif
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171 |
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172 | #ifndef ASYNC_SPD_CUST
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173 | # define ASYNC_SPD_CUST (ASYNC_SPD_HI|ASYNC_SPD_VHI)
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174 | #endif
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175 | #ifndef ASYNC_SPD_WARP
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176 | # define ASYNC_SPD_WARP (ASYNC_SPD_HI|ASYNC_SPD_SHI)
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177 | #endif
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178 | #ifndef ASYNC_SPD_MASK
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179 | # define ASYNC_SPD_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
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180 | #endif
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181 |
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182 | #ifndef ASYNC_CLOSING_WAIT_INF
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183 | # define ASYNC_CLOSING_WAIT_INF 0
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184 | #endif
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185 | #ifndef ASYNC_CLOSING_WAIT_NONE
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186 | # define ASYNC_CLOSING_WAIT_NONE 65535
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187 | #endif
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188 |
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189 | #ifndef _LINUX_SERIAL_H
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190 | struct serial_struct {
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191 | int type;
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192 | int line;
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193 | unsigned int port;
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194 | int irq;
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195 | int flags;
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196 | int xmit_fifo_size;
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197 | int custom_divisor;
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198 | int baud_base;
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199 | unsigned short close_delay;
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200 | char io_type;
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201 | char reserved_char[1];
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202 | int hub6;
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203 | unsigned short closing_wait; /* time to wait before closing */
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204 | unsigned short closing_wait2; /* no longer used... */
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205 | unsigned char *iomem_base;
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206 | unsigned short iomem_reg_shift;
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207 | unsigned int port_high;
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208 | unsigned long iomap_base; /* cookie passed into ioremap */
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209 | };
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210 | #endif
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211 |
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212 | //usage:#define setserial_trivial_usage
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213 | //usage: "[-gabGvzV] DEVICE [PARAMETER [ARG]]..."
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214 | //usage:#define setserial_full_usage "\n\n"
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215 | //usage: "Request or set Linux serial port information\n"
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216 | //usage: "\n"
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217 | //usage: " -g Interpret parameters as list of devices for reporting\n"
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218 | //usage: " -a Print all available information\n"
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219 | //usage: " -b Print summary information\n"
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220 | //usage: " -G Print in form which can be fed back\n"
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221 | //usage: " to setserial as command line parameters\n"
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222 | //usage: " -z Zero out serial flags before setting\n"
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223 | //usage: " -v Verbose\n"
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224 | //usage: "\n"
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225 | //usage: "Parameters: (* = takes an argument, ^ = can be turned off by preceding ^)\n"
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226 | //usage: " *port, *irq, *divisor, *uart, *baud_base, *close_delay, *closing_wait,\n"
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227 | //usage: " ^fourport, ^auto_irq, ^skip_test, ^sak, ^session_lockout, ^pgrp_lockout,\n"
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228 | //usage: " ^callout_nohup, ^split_termios, ^hup_notify, ^low_latency, autoconfig,\n"
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229 | //usage: " spd_normal, spd_hi, spd_vhi, spd_shi, spd_warp, spd_cust\n"
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230 | //usage: "\n"
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231 | //usage: "UART types:\n"
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232 | //usage: " unknown, 8250, 16450, 16550, 16550A, Cirrus, 16650, 16650V2, 16750,\n"
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233 | //usage: " 16950, 16954, 16654, 16850, RSA, NS16550A, XSCALE, RM9000, OCTEON, AR7,\n"
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234 | //usage: " U6_16550A"
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235 |
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236 | #define OPT_PRINT_SUMMARY (1 << 0)
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237 | #define OPT_PRINT_FEDBACK (1 << 1)
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238 | #define OPT_PRINT_ALL (1 << 2)
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239 | #define OPT_VERBOSE (1 << 3)
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240 | #define OPT_ZERO (1 << 4)
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241 | #define OPT_GET (1 << 5)
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242 |
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243 | #define OPT_MODE_MASK \
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244 | (OPT_PRINT_ALL | OPT_PRINT_SUMMARY | OPT_PRINT_FEDBACK)
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245 |
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246 | enum print_mode
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247 | {
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248 | PRINT_NORMAL = 0,
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249 | PRINT_SUMMARY = (1 << 0),
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250 | PRINT_FEDBACK = (1 << 1),
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251 | PRINT_ALL = (1 << 2),
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252 | };
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253 |
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254 | #define CTL_SET (1 << 0)
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255 | #define CTL_CONFIG (1 << 1)
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256 | #define CTL_GET (1 << 2)
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257 | #define CTL_CLOSE (1 << 3)
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258 | #define CTL_NODIE (1 << 4)
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259 |
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260 | static const char serial_types[] ALIGN1 =
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261 | "unknown\0" /* 0 */
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262 | "8250\0" /* 1 */
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263 | "16450\0" /* 2 */
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264 | "16550\0" /* 3 */
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265 | "16550A\0" /* 4 */
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266 | "Cirrus\0" /* 5 */
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267 | "16650\0" /* 6 */
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268 | "16650V2\0" /* 7 */
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269 | "16750\0" /* 8 */
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270 | "16950\0" /* 9 UNIMPLEMENTED: also know as "16950/954" */
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271 | "16954\0" /* 10 */
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272 | "16654\0" /* 11 */
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273 | "16850\0" /* 12 */
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274 | "RSA\0" /* 13 */
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275 | #ifndef SETSERIAL_BASE
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276 | "NS16550A\0" /* 14 */
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277 | "XSCALE\0" /* 15 */
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278 | "RM9000\0" /* 16 */
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279 | "OCTEON\0" /* 17 */
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280 | "AR7\0" /* 18 */
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281 | "U6_16550A\0" /* 19 */
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282 | #endif
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283 | ;
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284 |
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285 | #ifndef SETSERIAL_BASE
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286 | # define MAX_SERIAL_TYPE 19
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287 | #else
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288 | # define MAX_SERIAL_TYPE 13
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289 | #endif
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290 |
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291 | static const char commands[] ALIGN1 =
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292 | "spd_normal\0"
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293 | "spd_hi\0"
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294 | "spd_vhi\0"
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295 | "spd_shi\0"
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296 | "spd_warp\0"
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297 | "spd_cust\0"
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298 |
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299 | "sak\0"
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300 | "fourport\0"
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301 | "hup_notify\0"
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302 | "skip_test\0"
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303 | "auto_irq\0"
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304 | "split_termios\0"
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305 | "session_lockout\0"
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306 | "pgrp_lockout\0"
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307 | "callout_nohup\0"
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308 | "low_latency\0"
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309 |
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310 | "port\0"
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311 | "irq\0"
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312 | "divisor\0"
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313 | "uart\0"
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314 | "baud_base\0"
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315 | "close_delay\0"
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316 | "closing_wait\0"
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317 |
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318 | "autoconfig\0"
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319 | ;
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320 |
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321 | enum
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322 | {
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323 | CMD_SPD_NORMAL = 0,
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324 | CMD_SPD_HI,
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325 | CMD_SPD_VHI,
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326 | CMD_SPD_SHI,
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327 | CMD_SPD_WARP,
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328 | CMD_SPD_CUST,
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329 |
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330 | CMD_FLAG_SAK,
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331 | CMD_FLAG_FOURPORT,
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332 | CMD_FLAG_NUP_NOTIFY,
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333 | CMD_FLAG_SKIP_TEST,
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334 | CMD_FLAG_AUTO_IRQ,
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335 | CMD_FLAG_SPLIT_TERMIOS,
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336 | CMD_FLAG_SESSION_LOCKOUT,
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337 | CMD_FLAG_PGRP_LOCKOUT,
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338 | CMD_FLAG_CALLOUT_NOHUP,
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339 | CMD_FLAG_LOW_LATENCY,
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340 |
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341 | CMD_PORT,
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342 | CMD_IRQ,
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343 | CMD_DIVISOR,
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344 | CMD_UART,
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345 | CMD_BASE,
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346 | CMD_DELAY,
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347 | CMD_WAIT,
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348 |
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349 | CMD_AUTOCONFIG,
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350 |
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351 | CMD_FLAG_FIRST = CMD_FLAG_SAK,
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352 | CMD_FLAG_LAST = CMD_FLAG_LOW_LATENCY,
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353 | };
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354 |
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355 | static bool cmd_noprint(int cmd)
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356 | {
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357 | return (cmd >= CMD_FLAG_SKIP_TEST && cmd <= CMD_FLAG_CALLOUT_NOHUP);
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358 | }
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359 |
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360 | static bool cmd_is_flag(int cmd)
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361 | {
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362 | return (cmd >= CMD_FLAG_FIRST && cmd <= CMD_FLAG_LAST);
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363 | }
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364 |
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365 | static bool cmd_need_arg(int cmd)
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366 | {
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367 | return (cmd >= CMD_PORT && cmd <= CMD_WAIT);
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368 | }
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369 |
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370 | #define ALL_SPD ( \
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371 | ASYNC_SPD_HI | ASYNC_SPD_VHI | ASYNC_SPD_SHI | \
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372 | ASYNC_SPD_WARP | ASYNC_SPD_CUST \
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373 | )
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374 |
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375 | #define ALL_FLAGS ( \
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376 | ASYNC_SAK | ASYNC_FOURPORT | ASYNC_HUP_NOTIFY | \
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377 | ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ | ASYNC_SPLIT_TERMIOS | \
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378 | ASYNC_SESSION_LOCKOUT | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP | \
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379 | ASYNC_LOW_LATENCY \
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380 | )
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381 |
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382 | #if (ALL_SPD | ALL_FLAGS) > 0xffff
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383 | # error "Unexpected flags size"
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384 | #endif
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385 |
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386 | static const uint16_t setbits[CMD_FLAG_LAST + 1] =
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387 | {
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388 | 0,
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389 | ASYNC_SPD_HI,
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390 | ASYNC_SPD_VHI,
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391 | ASYNC_SPD_SHI,
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392 | ASYNC_SPD_WARP,
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393 | ASYNC_SPD_CUST,
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394 |
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395 | ASYNC_SAK,
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396 | ASYNC_FOURPORT,
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397 | ASYNC_HUP_NOTIFY,
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398 | ASYNC_SKIP_TEST,
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399 | ASYNC_AUTO_IRQ,
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400 | ASYNC_SPLIT_TERMIOS,
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401 | ASYNC_SESSION_LOCKOUT,
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402 | ASYNC_PGRP_LOCKOUT,
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403 | ASYNC_CALLOUT_NOHUP,
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404 | ASYNC_LOW_LATENCY
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405 | };
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406 |
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407 | #define STR_INFINITE "infinite"
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408 | #define STR_NONE "none"
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409 |
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410 | static const char *uart_type(int type)
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411 | {
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412 | if (type > MAX_SERIAL_TYPE)
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413 | return "undefined";
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414 |
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415 | return nth_string(serial_types, type);
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416 | }
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417 |
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418 | /* libbb candidate */
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419 | static int index_in_strings_case_insensitive(const char *strings, const char *key)
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420 | {
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421 | int idx = 0;
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422 |
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423 | while (*strings) {
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424 | if (strcasecmp(strings, key) == 0) {
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425 | return idx;
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426 | }
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427 | strings += strlen(strings) + 1; /* skip NUL */
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428 | idx++;
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429 | }
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430 | return -1;
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431 | }
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432 |
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433 | static int uart_id(const char *name)
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434 | {
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435 | return index_in_strings_case_insensitive(serial_types, name);
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436 | }
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437 |
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438 | static const char *get_spd(int flags, enum print_mode mode)
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439 | {
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440 | int idx;
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441 |
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442 | switch (flags & ASYNC_SPD_MASK) {
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443 | case ASYNC_SPD_HI:
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444 | idx = CMD_SPD_HI;
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445 | break;
|
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446 | case ASYNC_SPD_VHI:
|
---|
447 | idx = CMD_SPD_VHI;
|
---|
448 | break;
|
---|
449 | case ASYNC_SPD_SHI:
|
---|
450 | idx = CMD_SPD_SHI;
|
---|
451 | break;
|
---|
452 | case ASYNC_SPD_WARP:
|
---|
453 | idx = CMD_SPD_WARP;
|
---|
454 | break;
|
---|
455 | case ASYNC_SPD_CUST:
|
---|
456 | idx = CMD_SPD_CUST;
|
---|
457 | break;
|
---|
458 | default:
|
---|
459 | if (mode < PRINT_FEDBACK)
|
---|
460 | return NULL;
|
---|
461 | idx = CMD_SPD_NORMAL;
|
---|
462 | }
|
---|
463 |
|
---|
464 | return nth_string(commands, idx);
|
---|
465 | }
|
---|
466 |
|
---|
467 | static int get_numeric(const char *arg)
|
---|
468 | {
|
---|
469 | return bb_strtol(arg, NULL, 0);
|
---|
470 | }
|
---|
471 |
|
---|
472 | static int get_wait(const char *arg)
|
---|
473 | {
|
---|
474 | if (strcasecmp(arg, STR_NONE) == 0)
|
---|
475 | return ASYNC_CLOSING_WAIT_NONE;
|
---|
476 |
|
---|
477 | if (strcasecmp(arg, STR_INFINITE) == 0)
|
---|
478 | return ASYNC_CLOSING_WAIT_INF;
|
---|
479 |
|
---|
480 | return get_numeric(arg);
|
---|
481 | }
|
---|
482 |
|
---|
483 | static int get_uart(const char *arg)
|
---|
484 | {
|
---|
485 | int uart = uart_id(arg);
|
---|
486 |
|
---|
487 | if (uart < 0)
|
---|
488 | bb_error_msg_and_die("illegal UART type: %s", arg);
|
---|
489 |
|
---|
490 | return uart;
|
---|
491 | }
|
---|
492 |
|
---|
493 | static int serial_open(const char *dev, bool quiet)
|
---|
494 | {
|
---|
495 | int fd;
|
---|
496 |
|
---|
497 | fd = device_open(dev, O_RDWR | O_NONBLOCK);
|
---|
498 | if (fd < 0 && !quiet)
|
---|
499 | bb_simple_perror_msg(dev);
|
---|
500 |
|
---|
501 | return fd;
|
---|
502 | }
|
---|
503 |
|
---|
504 | static int serial_ctl(int fd, int ops, struct serial_struct *serinfo)
|
---|
505 | {
|
---|
506 | int ret = 0;
|
---|
507 | const char *err;
|
---|
508 |
|
---|
509 | if (ops & CTL_SET) {
|
---|
510 | ret = ioctl(fd, TIOCSSERIAL, serinfo);
|
---|
511 | if (ret < 0) {
|
---|
512 | err = "can't set serial info";
|
---|
513 | goto fail;
|
---|
514 | }
|
---|
515 | }
|
---|
516 |
|
---|
517 | if (ops & CTL_CONFIG) {
|
---|
518 | ret = ioctl(fd, TIOCSERCONFIG);
|
---|
519 | if (ret < 0) {
|
---|
520 | err = "can't autoconfigure port";
|
---|
521 | goto fail;
|
---|
522 | }
|
---|
523 | }
|
---|
524 |
|
---|
525 | if (ops & CTL_GET) {
|
---|
526 | ret = ioctl(fd, TIOCGSERIAL, serinfo);
|
---|
527 | if (ret < 0) {
|
---|
528 | err = "can't get serial info";
|
---|
529 | goto fail;
|
---|
530 | }
|
---|
531 | }
|
---|
532 | nodie:
|
---|
533 | if (ops & CTL_CLOSE)
|
---|
534 | close(fd);
|
---|
535 |
|
---|
536 | return ret;
|
---|
537 | fail:
|
---|
538 | bb_simple_perror_msg(err);
|
---|
539 | if (ops & CTL_NODIE)
|
---|
540 | goto nodie;
|
---|
541 | exit(EXIT_FAILURE);
|
---|
542 | }
|
---|
543 |
|
---|
544 | static void print_flag(const char **prefix, const char *flag)
|
---|
545 | {
|
---|
546 | printf("%s%s", *prefix, flag);
|
---|
547 | *prefix = " ";
|
---|
548 | }
|
---|
549 |
|
---|
550 | static void print_serial_flags(int serial_flags, enum print_mode mode,
|
---|
551 | const char *prefix, const char *postfix)
|
---|
552 | {
|
---|
553 | int i;
|
---|
554 | const char *spd, *pr;
|
---|
555 |
|
---|
556 | pr = prefix;
|
---|
557 |
|
---|
558 | spd = get_spd(serial_flags, mode);
|
---|
559 | if (spd)
|
---|
560 | print_flag(&pr, spd);
|
---|
561 |
|
---|
562 | for (i = CMD_FLAG_FIRST; i <= CMD_FLAG_LAST; i++) {
|
---|
563 | if ((serial_flags & setbits[i])
|
---|
564 | && (mode > PRINT_SUMMARY || !cmd_noprint(i))
|
---|
565 | ) {
|
---|
566 | print_flag(&pr, nth_string(commands, i));
|
---|
567 | }
|
---|
568 | }
|
---|
569 |
|
---|
570 | puts(pr == prefix ? "" : postfix);
|
---|
571 | }
|
---|
572 |
|
---|
573 | static void print_closing_wait(unsigned int closing_wait)
|
---|
574 | {
|
---|
575 | switch (closing_wait) {
|
---|
576 | case ASYNC_CLOSING_WAIT_NONE:
|
---|
577 | puts(STR_NONE);
|
---|
578 | break;
|
---|
579 | case ASYNC_CLOSING_WAIT_INF:
|
---|
580 | puts(STR_INFINITE);
|
---|
581 | break;
|
---|
582 | default:
|
---|
583 | printf("%u\n", closing_wait);
|
---|
584 | }
|
---|
585 | }
|
---|
586 |
|
---|
587 | static void serial_get(const char *device, enum print_mode mode)
|
---|
588 | {
|
---|
589 | int fd, ret;
|
---|
590 | const char *uart, *prefix, *postfix;
|
---|
591 | struct serial_struct serinfo;
|
---|
592 |
|
---|
593 | fd = serial_open(device, /*quiet:*/ mode == PRINT_SUMMARY);
|
---|
594 | if (fd < 0)
|
---|
595 | return;
|
---|
596 |
|
---|
597 | ret = serial_ctl(fd, CTL_GET | CTL_CLOSE | CTL_NODIE, &serinfo);
|
---|
598 | if (ret < 0)
|
---|
599 | return;
|
---|
600 |
|
---|
601 | uart = uart_type(serinfo.type);
|
---|
602 | prefix = ", Flags: ";
|
---|
603 | postfix = "";
|
---|
604 |
|
---|
605 | switch (mode) {
|
---|
606 | case PRINT_NORMAL:
|
---|
607 | printf("%s, UART: %s, Port: 0x%.4x, IRQ: %d",
|
---|
608 | device, uart, serinfo.port, serinfo.irq);
|
---|
609 | break;
|
---|
610 | case PRINT_SUMMARY:
|
---|
611 | if (!serinfo.type)
|
---|
612 | return;
|
---|
613 | printf("%s at 0x%.4x (irq = %d) is a %s",
|
---|
614 | device, serinfo.port, serinfo.irq, uart);
|
---|
615 | prefix = " (";
|
---|
616 | postfix = ")";
|
---|
617 | break;
|
---|
618 | case PRINT_FEDBACK:
|
---|
619 | printf("%s uart %s port 0x%.4x irq %d baud_base %d", device,
|
---|
620 | uart, serinfo.port, serinfo.irq, serinfo.baud_base);
|
---|
621 | prefix = " ";
|
---|
622 | break;
|
---|
623 | case PRINT_ALL:
|
---|
624 | printf("%s, Line %d, UART: %s, Port: 0x%.4x, IRQ: %d\n",
|
---|
625 | device, serinfo.line, uart, serinfo.port, serinfo.irq);
|
---|
626 | printf("\tBaud_base: %d, close_delay: %u, divisor: %d\n",
|
---|
627 | serinfo.baud_base, serinfo.close_delay,
|
---|
628 | serinfo.custom_divisor);
|
---|
629 | printf("\tclosing_wait: ");
|
---|
630 | print_closing_wait(serinfo.closing_wait);
|
---|
631 | prefix = "\tFlags: ";
|
---|
632 | postfix = "\n";
|
---|
633 | break;
|
---|
634 | default:
|
---|
635 | assert(0);
|
---|
636 | }
|
---|
637 |
|
---|
638 | print_serial_flags(serinfo.flags, mode, prefix, postfix);
|
---|
639 | }
|
---|
640 |
|
---|
641 | static int find_cmd(const char *cmd)
|
---|
642 | {
|
---|
643 | int idx;
|
---|
644 |
|
---|
645 | idx = index_in_strings_case_insensitive(commands, cmd);
|
---|
646 | if (idx < 0)
|
---|
647 | bb_error_msg_and_die("invalid flag: %s", cmd);
|
---|
648 |
|
---|
649 | return idx;
|
---|
650 | }
|
---|
651 |
|
---|
652 | static void serial_set(char **arg, int opts)
|
---|
653 | {
|
---|
654 | struct serial_struct serinfo;
|
---|
655 | int cmd;
|
---|
656 | const char *word;
|
---|
657 | int fd;
|
---|
658 |
|
---|
659 | fd = serial_open(*arg++, /*quiet:*/ false);
|
---|
660 | if (fd < 0)
|
---|
661 | exit(201);
|
---|
662 |
|
---|
663 | serial_ctl(fd, CTL_GET, &serinfo);
|
---|
664 |
|
---|
665 | if (opts & OPT_ZERO)
|
---|
666 | serinfo.flags = 0;
|
---|
667 |
|
---|
668 | while (*arg) {
|
---|
669 | int invert;
|
---|
670 |
|
---|
671 | word = *arg++;
|
---|
672 | invert = (*word == '^');
|
---|
673 | word += invert;
|
---|
674 |
|
---|
675 | cmd = find_cmd(word);
|
---|
676 |
|
---|
677 | if (*arg == NULL && cmd_need_arg(cmd))
|
---|
678 | bb_error_msg_and_die(bb_msg_requires_arg, word);
|
---|
679 |
|
---|
680 | if (invert && !cmd_is_flag(cmd))
|
---|
681 | bb_error_msg_and_die("can't invert %s", word);
|
---|
682 |
|
---|
683 | switch (cmd) {
|
---|
684 | case CMD_SPD_NORMAL:
|
---|
685 | case CMD_SPD_HI:
|
---|
686 | case CMD_SPD_VHI:
|
---|
687 | case CMD_SPD_SHI:
|
---|
688 | case CMD_SPD_WARP:
|
---|
689 | case CMD_SPD_CUST:
|
---|
690 | serinfo.flags &= ~ASYNC_SPD_MASK;
|
---|
691 | /* fallthrough */
|
---|
692 | case CMD_FLAG_SAK:
|
---|
693 | case CMD_FLAG_FOURPORT:
|
---|
694 | case CMD_FLAG_NUP_NOTIFY:
|
---|
695 | case CMD_FLAG_SKIP_TEST:
|
---|
696 | case CMD_FLAG_AUTO_IRQ:
|
---|
697 | case CMD_FLAG_SPLIT_TERMIOS:
|
---|
698 | case CMD_FLAG_SESSION_LOCKOUT:
|
---|
699 | case CMD_FLAG_PGRP_LOCKOUT:
|
---|
700 | case CMD_FLAG_CALLOUT_NOHUP:
|
---|
701 | case CMD_FLAG_LOW_LATENCY:
|
---|
702 | if (invert)
|
---|
703 | serinfo.flags &= ~setbits[cmd];
|
---|
704 | else
|
---|
705 | serinfo.flags |= setbits[cmd];
|
---|
706 | break;
|
---|
707 | case CMD_PORT:
|
---|
708 | serinfo.port = get_numeric(*arg++);
|
---|
709 | break;
|
---|
710 | case CMD_IRQ:
|
---|
711 | serinfo.irq = get_numeric(*arg++);
|
---|
712 | break;
|
---|
713 | case CMD_DIVISOR:
|
---|
714 | serinfo.custom_divisor = get_numeric(*arg++);
|
---|
715 | break;
|
---|
716 | case CMD_UART:
|
---|
717 | serinfo.type = get_uart(*arg++);
|
---|
718 | break;
|
---|
719 | case CMD_BASE:
|
---|
720 | serinfo.baud_base = get_numeric(*arg++);
|
---|
721 | break;
|
---|
722 | case CMD_DELAY:
|
---|
723 | serinfo.close_delay = get_numeric(*arg++);
|
---|
724 | break;
|
---|
725 | case CMD_WAIT:
|
---|
726 | serinfo.closing_wait = get_wait(*arg++);
|
---|
727 | break;
|
---|
728 | case CMD_AUTOCONFIG:
|
---|
729 | serial_ctl(fd, CTL_SET | CTL_CONFIG | CTL_GET, &serinfo);
|
---|
730 | break;
|
---|
731 | default:
|
---|
732 | assert(0);
|
---|
733 | }
|
---|
734 | }
|
---|
735 |
|
---|
736 | serial_ctl(fd, CTL_SET | CTL_CLOSE, &serinfo);
|
---|
737 | }
|
---|
738 |
|
---|
739 | int setserial_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
740 | int setserial_main(int argc UNUSED_PARAM, char **argv)
|
---|
741 | {
|
---|
742 | int opts;
|
---|
743 |
|
---|
744 | opt_complementary = "-1:b-aG:G-ab:a-bG";
|
---|
745 | opts = getopt32(argv, "bGavzg");
|
---|
746 | argv += optind;
|
---|
747 |
|
---|
748 | if (!argv[1]) /* one arg only? */
|
---|
749 | opts |= OPT_GET;
|
---|
750 |
|
---|
751 | if (!(opts & OPT_GET)) {
|
---|
752 | serial_set(argv, opts);
|
---|
753 | argv[1] = NULL;
|
---|
754 | }
|
---|
755 |
|
---|
756 | if (opts & (OPT_VERBOSE | OPT_GET)) {
|
---|
757 | do {
|
---|
758 | serial_get(*argv++, opts & OPT_MODE_MASK);
|
---|
759 | } while (*argv);
|
---|
760 | }
|
---|
761 |
|
---|
762 | return EXIT_SUCCESS;
|
---|
763 | }
|
---|