scoutos / prex-0.9.0 / bsp / drv / dev / base / cons.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2008-2009, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * cons.c - console redirection driver
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32 | */
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33 | |||
34 | #include <driver.h> |
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35 | #include <cons.h> |
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36 | #include <sys/dbgctl.h> |
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37 | |||
38 | static int cons_open(device_t, int); |
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39 | static int cons_close(device_t); |
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40 | static int cons_read(device_t, char *, size_t *, int); |
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41 | static int cons_write(device_t, char *, size_t *, int); |
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42 | static int cons_ioctl(device_t, u_long, void *); |
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43 | static int cons_devctl(device_t, u_long, void *); |
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44 | static int cons_init(struct driver *); |
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45 | |||
46 | static struct devops cons_devops = { |
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47 | /* open */ cons_open,
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48 | /* close */ cons_close,
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49 | /* read */ cons_read,
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50 | /* write */ cons_write,
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51 | /* ioctl */ cons_ioctl,
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52 | /* devctl */ cons_devctl,
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53 | }; |
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54 | |||
55 | struct driver cons_driver = {
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56 | /* name */ "cons", |
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57 | /* devops */ &cons_devops,
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58 | /* devsz */ 0, |
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59 | /* flags */ 0, |
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60 | /* probe */ NULL, |
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61 | /* init */ cons_init,
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62 | /* unload */ NULL, |
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63 | }; |
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64 | |||
65 | static struct diag_ops cons_diag_ops = { |
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66 | /* puts */ cons_puts,
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67 | }; |
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68 | |||
69 | static struct consdev *consdev; /* console device info */ |
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70 | |||
71 | static int |
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72 | cons_open(device_t dev, int mode)
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73 | { |
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74 | |||
75 | ASSERT(consdev != NULL);
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76 | dev = consdev->dev; |
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77 | return consdev->devops->open(dev, mode);
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78 | } |
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79 | |||
80 | static int |
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81 | cons_close(device_t dev) |
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82 | { |
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83 | |||
84 | ASSERT(consdev != NULL);
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85 | dev = consdev->dev; |
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86 | return consdev->devops->close(dev);
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87 | } |
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88 | |||
89 | static int |
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90 | cons_read(device_t dev, char *buf, size_t *nbyte, int blkno) |
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91 | { |
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92 | |||
93 | ASSERT(consdev != NULL);
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94 | dev = consdev->dev; |
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95 | return consdev->devops->read(dev, buf, nbyte, blkno);
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96 | } |
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97 | |||
98 | static int |
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99 | cons_write(device_t dev, char *buf, size_t *nbyte, int blkno) |
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100 | { |
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101 | |||
102 | ASSERT(consdev != NULL);
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103 | dev = consdev->dev; |
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104 | return consdev->devops->write(dev, buf, nbyte, blkno);
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105 | } |
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106 | |||
107 | static int |
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108 | cons_ioctl(device_t dev, u_long cmd, void *arg)
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109 | { |
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110 | |||
111 | ASSERT(consdev != NULL);
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112 | dev = consdev->dev; |
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113 | return consdev->devops->ioctl(dev, cmd, arg);
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114 | } |
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115 | |||
116 | static int |
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117 | cons_devctl(device_t dev, u_long cmd, void *arg)
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118 | { |
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119 | |||
120 | ASSERT(consdev != NULL);
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121 | dev = consdev->dev; |
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122 | return consdev->devops->devctl(dev, cmd, arg);
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123 | } |
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124 | |||
125 | /*
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126 | * Poll (busy wait) for a input and return the input key.
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127 | * cons_pollc() must be called before cons_getc() could be used.
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128 | * cons_getc() should be used only for kernel deugger.
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129 | */
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130 | int
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131 | cons_getc(void)
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132 | { |
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133 | |||
134 | ASSERT(consdev != NULL);
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135 | return consdev->cngetc(consdev->dev);
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136 | } |
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137 | |||
138 | /*
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139 | * Switch the console driver to polling mode if on is non-zero, or
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140 | * back to interrupt driven mode if on is zero.
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141 | * cons_pollc() should be used only for kernel deugger.
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142 | */
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143 | void
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144 | cons_pollc(int on)
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145 | { |
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146 | |||
147 | ASSERT(consdev != NULL);
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148 | consdev->cnpollc(consdev->dev, on); |
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149 | } |
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150 | |||
151 | /*
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152 | * Console character output routine.
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153 | */
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154 | void
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155 | cons_putc(int c)
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156 | { |
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157 | |||
158 | ASSERT(consdev != NULL);
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159 | if (c) {
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160 | consdev->cnputc(consdev->dev, c); |
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161 | if (c == '\n') |
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162 | consdev->cnputc(consdev->dev, '\r');
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163 | } |
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164 | } |
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165 | |||
166 | void
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167 | cons_puts(char *str)
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168 | { |
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169 | |||
170 | ASSERT(consdev != NULL);
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171 | |||
172 | consdev->cnpollc(consdev->dev, 1);
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173 | while (*str) {
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174 | consdev->cnputc(consdev->dev, *str); |
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175 | if (*str == '\n') |
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176 | consdev->cnputc(consdev->dev, '\r');
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177 | str++; |
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178 | } |
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179 | consdev->cnpollc(consdev->dev, 0);
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180 | } |
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181 | |||
182 | void
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183 | cons_attach(struct consdev *cdev, int diag) |
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184 | { |
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185 | |||
186 | if (consdev != NULL) |
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187 | return;
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188 | consdev = cdev; |
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189 | |||
190 | /*
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191 | * Set console port as diag port.
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192 | */
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193 | if (diag)
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194 | dbgctl(DBGC_SETDIAG, &cons_diag_ops); |
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195 | } |
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196 | |||
197 | int
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198 | cons_init(struct driver *self)
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199 | { |
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200 | |||
201 | consdev = NULL;
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202 | device_create(self, "console", D_CHR|D_TTY);
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203 | return 0; |
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204 | } |