1 | /*
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2 | * Copyright (c) 2006 Josef Cejka
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3 | * Copyright (c) 2011 Jiri Svoboda
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4 | * All rights reserved.
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5 | *
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6 | * Redistribution and use in source and binary forms, with or without
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7 | * modification, are permitted provided that the following conditions
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8 | * are met:
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9 | *
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10 | * - Redistributions of source code must retain the above copyright
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11 | * notice, this list of conditions and the following disclaimer.
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12 | * - Redistributions in binary form must reproduce the above copyright
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13 | * notice, this list of conditions and the following disclaimer in the
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14 | * documentation and/or other materials provided with the distribution.
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15 | * - The name of the author may not be used to endorse or promote products
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16 | * derived from this software without specific prior written permission.
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17 | *
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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28 | */
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29 |
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30 | /** @file
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31 | * @brief Msim console driver.
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32 | */
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33 |
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34 | #include <async.h>
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35 | #include <ddf/driver.h>
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36 | #include <ddf/log.h>
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37 | #include <ddi.h>
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38 | #include <errno.h>
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39 | #include <io/chardev_srv.h>
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40 |
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41 | #include "msim-con.h"
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42 |
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43 | static void msim_con_connection(ipc_call_t *, void *);
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44 |
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45 | static errno_t msim_con_read(chardev_srv_t *, void *, size_t, size_t *,
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46 | chardev_flags_t);
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47 | static errno_t msim_con_write(chardev_srv_t *, const void *, size_t, size_t *);
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48 |
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49 | static chardev_ops_t msim_con_chardev_ops = {
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50 | .read = msim_con_read,
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51 | .write = msim_con_write
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52 | };
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53 |
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54 | static irq_cmd_t msim_cmds_proto[] = {
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55 | {
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56 | .cmd = CMD_PIO_READ_8,
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57 | .addr = (void *) 0, /* will be patched in run-time */
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58 | .dstarg = 2
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59 | },
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60 | {
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61 | .cmd = CMD_ACCEPT
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62 | }
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63 | };
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64 |
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65 | static void msim_irq_handler(ipc_call_t *call, void *arg)
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66 | {
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67 | msim_con_t *con = (msim_con_t *) arg;
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68 | uint8_t c;
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69 | errno_t rc;
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70 |
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71 | fibril_mutex_lock(&con->buf_lock);
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72 |
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73 | c = ipc_get_arg2(call);
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74 | rc = circ_buf_push(&con->cbuf, &c);
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75 | if (rc != EOK)
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76 | ddf_msg(LVL_ERROR, "Buffer overrun");
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77 |
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78 | fibril_mutex_unlock(&con->buf_lock);
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79 | fibril_condvar_broadcast(&con->buf_cv);
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80 | }
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81 |
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82 | /** Add msim console device. */
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83 | errno_t msim_con_add(msim_con_t *con, msim_con_res_t *res)
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84 | {
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85 | ddf_fun_t *fun = NULL;
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86 | irq_cmd_t *msim_cmds = NULL;
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87 | errno_t rc;
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88 | bool bound = false;
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89 |
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90 | circ_buf_init(&con->cbuf, con->buf, msim_con_buf_size, 1);
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91 | fibril_mutex_initialize(&con->buf_lock);
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92 | fibril_condvar_initialize(&con->buf_cv);
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93 |
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94 | con->irq_handle = CAP_NIL;
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95 |
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96 | msim_cmds = malloc(sizeof(msim_cmds_proto));
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97 | if (msim_cmds == NULL) {
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98 | rc = ENOMEM;
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99 | goto error;
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100 | }
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101 |
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102 | con->res = *res;
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103 |
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104 | fun = ddf_fun_create(con->dev, fun_exposed, "a");
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105 | if (fun == NULL) {
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106 | ddf_msg(LVL_ERROR, "Error creating function 'a'.");
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107 | rc = ENOMEM;
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108 | goto error;
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109 | }
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110 |
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111 | rc = pio_enable((void *)res->base, 1, (void **) &con->out_reg);
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112 | if (rc != EOK) {
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113 | ddf_msg(LVL_ERROR, "Error enabling I/O");
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114 | goto error;
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115 | }
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116 |
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117 | ddf_fun_set_conn_handler(fun, msim_con_connection);
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118 |
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119 | con->irq_range[0].base = res->base;
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120 | con->irq_range[0].size = 1;
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121 |
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122 | memcpy(msim_cmds, msim_cmds_proto, sizeof(msim_cmds_proto));
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123 | msim_cmds[0].addr = (void *) res->base;
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124 |
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125 | con->irq_code.rangecount = 1;
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126 | con->irq_code.ranges = con->irq_range;
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127 | con->irq_code.cmdcount = sizeof(msim_cmds_proto) / sizeof(irq_cmd_t);
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128 | con->irq_code.cmds = msim_cmds;
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129 |
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130 | rc = async_irq_subscribe(res->irq, msim_irq_handler, con,
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131 | &con->irq_code, &con->irq_handle);
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132 | if (rc != EOK) {
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133 | ddf_msg(LVL_ERROR, "Error registering IRQ code.");
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134 | goto error;
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135 | }
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136 |
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137 | chardev_srvs_init(&con->cds);
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138 | con->cds.ops = &msim_con_chardev_ops;
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139 | con->cds.sarg = con;
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140 |
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141 | rc = ddf_fun_bind(fun);
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142 | if (rc != EOK) {
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143 | ddf_msg(LVL_ERROR, "Error binding function 'a'.");
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144 | goto error;
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145 | }
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146 |
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147 | bound = true;
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148 |
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149 | rc = ddf_fun_add_to_category(fun, "console");
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150 | if (rc != EOK) {
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151 | ddf_msg(LVL_ERROR, "Error adding function 'a' to category "
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152 | "'console'.");
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153 | goto error;
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154 | }
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155 |
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156 | return EOK;
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157 | error:
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158 | if (cap_handle_valid(con->irq_handle))
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159 | async_irq_unsubscribe(con->irq_handle);
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160 | if (bound)
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161 | ddf_fun_unbind(fun);
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162 | if (fun != NULL)
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163 | ddf_fun_destroy(fun);
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164 | free(msim_cmds);
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165 |
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166 | return rc;
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167 | }
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168 |
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169 | /** Remove msim console device */
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170 | errno_t msim_con_remove(msim_con_t *con)
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171 | {
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172 | return ENOTSUP;
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173 | }
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174 |
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175 | /** Msim console device gone */
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176 | errno_t msim_con_gone(msim_con_t *con)
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177 | {
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178 | return ENOTSUP;
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179 | }
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180 |
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181 | static void msim_con_putchar(msim_con_t *con, uint8_t ch)
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182 | {
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183 | pio_write_8(con->out_reg, ch);
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184 | }
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185 |
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186 | /** Read from msim console device */
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187 | static errno_t msim_con_read(chardev_srv_t *srv, void *buf, size_t size,
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188 | size_t *nread, chardev_flags_t flags)
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189 | {
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190 | msim_con_t *con = (msim_con_t *) srv->srvs->sarg;
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191 | size_t p;
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192 | uint8_t *bp = (uint8_t *) buf;
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193 | errno_t rc;
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194 |
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195 | fibril_mutex_lock(&con->buf_lock);
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196 |
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197 | while ((flags & chardev_f_nonblock) == 0 &&
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198 | circ_buf_nused(&con->cbuf) == 0)
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199 | fibril_condvar_wait(&con->buf_cv, &con->buf_lock);
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200 |
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201 | p = 0;
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202 | while (p < size) {
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203 | rc = circ_buf_pop(&con->cbuf, &bp[p]);
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204 | if (rc != EOK)
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205 | break;
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206 | ++p;
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207 | }
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208 |
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209 | fibril_mutex_unlock(&con->buf_lock);
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210 |
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211 | *nread = p;
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212 | return EOK;
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213 | }
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214 |
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215 | /** Write to msim console device */
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216 | static errno_t msim_con_write(chardev_srv_t *srv, const void *data, size_t size,
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217 | size_t *nwr)
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218 | {
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219 | msim_con_t *con = (msim_con_t *) srv->srvs->sarg;
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220 | size_t i;
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221 | uint8_t *dp = (uint8_t *) data;
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222 |
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223 | for (i = 0; i < size; i++)
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224 | msim_con_putchar(con, dp[i]);
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225 |
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226 | *nwr = size;
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227 | return EOK;
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228 | }
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229 |
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230 | /** Character device connection handler. */
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231 | static void msim_con_connection(ipc_call_t *icall, void *arg)
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232 | {
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233 | msim_con_t *con = (msim_con_t *) ddf_dev_data_get(
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234 | ddf_fun_get_dev((ddf_fun_t *) arg));
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235 |
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236 | chardev_conn(icall, &con->cds);
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237 | }
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238 |
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239 | /** @}
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240 | */
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