author | Florian Pose <fp@igh-essen.com> |
Mon, 02 Feb 2009 13:32:48 +0000 | |
changeset 1350 | cd278db5a872 |
parent 1336 | e27b37e80a99 |
child 1363 | 11c0b2caa253 |
permissions | -rw-r--r-- |
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/****************************************************************************** |
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* |
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* $Id$ |
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* |
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* Copyright (C) 2008 Olav Zarges, imc Meßsysteme GmbH |
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* |
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* This file is part of the IgH EtherCAT Master. |
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* |
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* The IgH EtherCAT Master is free software; you can redistribute it |
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* and/or modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* The IgH EtherCAT Master is distributed in the hope that it will be |
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with the IgH EtherCAT Master; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* The right to use EtherCAT Technology is granted and comes free of |
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* charge under condition of compatibility of product made by |
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* Licensee. People intending to distribute/sell products based on the |
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* code, have to sign an agreement to guarantee that products using |
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* software based on IgH EtherCAT master stay compatible with the actual |
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* EtherCAT specification (which are released themselves as an open |
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* standard) as the (only) precondition to have the right to use EtherCAT |
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* Technology, IP and trade marks. |
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* |
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*****************************************************************************/ |
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/** \file |
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* File-over-EtherCAT request functions. |
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*/ |
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/*****************************************************************************/ |
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#include <linux/module.h> |
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#include <linux/jiffies.h> |
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#include "foe_request.h" |
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#include "foe.h" |
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/*****************************************************************************/ |
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/** Default timeout in ms to wait for FoE transfer responses. |
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*/ |
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#define EC_FOE_REQUEST_RESPONSE_TIMEOUT 3000 |
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/*****************************************************************************/ |
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void ec_foe_request_clear_data(ec_foe_request_t *); |
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/*****************************************************************************/ |
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/** FoE request constructor. |
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*/ |
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void ec_foe_request_init( |
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ec_foe_request_t *req, /**< FoE request. */ |
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uint8_t* file_name /** filename */) |
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{ |
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req->buffer = NULL; |
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req->file_name = file_name; |
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req->buffer_size = 0; |
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req->data_size = 0; |
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req->dir = EC_DIR_INVALID; |
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req->issue_timeout = 0; // no timeout |
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req->response_timeout = EC_FOE_REQUEST_RESPONSE_TIMEOUT; |
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req->state = EC_INT_REQUEST_INIT; |
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req->result = FOE_BUSY; |
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req->error_code = 0x00000000; |
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} |
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/*****************************************************************************/ |
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/** FoE request destructor. |
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*/ |
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void ec_foe_request_clear( |
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ec_foe_request_t *req /**< FoE request. */ |
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) |
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{ |
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ec_foe_request_clear_data(req); |
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} |
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/*****************************************************************************/ |
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/** FoE request destructor. |
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*/ |
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void ec_foe_request_clear_data( |
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ec_foe_request_t *req /**< FoE request. */ |
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) |
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{ |
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if (req->buffer) { |
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kfree(req->buffer); |
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req->buffer = NULL; |
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} |
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100 |
req->buffer_size = 0; |
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101 |
req->data_size = 0; |
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102 |
} |
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|
103 |
|
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104 |
/*****************************************************************************/ |
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|
105 |
|
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106 |
/** Pre-allocates the data memory. |
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107 |
* |
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108 |
* If the \a buffer_size is already bigger than \a size, nothing is done. |
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109 |
*/ |
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110 |
int ec_foe_request_alloc( |
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111 |
ec_foe_request_t *req, /**< FoE request. */ |
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112 |
size_t size /**< Data size to allocate. */ |
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113 |
) |
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114 |
{ |
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115 |
if (size <= req->buffer_size) |
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116 |
return 0; |
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117 |
|
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118 |
ec_foe_request_clear_data(req); |
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119 |
|
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120 |
if (!(req->buffer = (uint8_t *) kmalloc(size, GFP_KERNEL))) { |
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121 |
EC_ERR("Failed to allocate %u bytes of FoE memory.\n", size); |
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122 |
return -1; |
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123 |
} |
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124 |
|
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125 |
req->buffer_size = size; |
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126 |
req->data_size = 0; |
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127 |
return 0; |
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128 |
} |
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129 |
|
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130 |
/*****************************************************************************/ |
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131 |
|
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132 |
/** Copies FoE data from an external source. |
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133 |
* |
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134 |
* If the \a buffer_size is to small, new memory is allocated. |
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135 |
*/ |
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136 |
int ec_foe_request_copy_data( |
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137 |
ec_foe_request_t *req, /**< FoE request. */ |
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138 |
const uint8_t *source, /**< Source data. */ |
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139 |
size_t size /**< Number of bytes in \a source. */ |
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140 |
) |
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141 |
{ |
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142 |
if (ec_foe_request_alloc(req, size)) |
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143 |
return -1; |
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144 |
|
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145 |
memcpy(req->buffer, source, size); |
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146 |
req->data_size = size; |
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147 |
return 0; |
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148 |
} |
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149 |
|
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150 |
/*****************************************************************************/ |
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|
151 |
|
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152 |
/** Checks, if the timeout was exceeded. |
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153 |
* |
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154 |
* \return non-zero if the timeout was exceeded, else zero. |
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155 |
*/ |
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156 |
int ec_foe_request_timed_out(const ec_foe_request_t *req /**< FoE request. */) |
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157 |
{ |
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158 |
return req->issue_timeout |
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159 |
&& jiffies - req->jiffies_start > HZ * req->issue_timeout / 1000; |
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160 |
} |
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|
161 |
|
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162 |
/*****************************************************************************/ |
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|
163 |
|
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164 |
void ec_foe_request_timeout(ec_foe_request_t *req, uint32_t timeout) |
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165 |
{ |
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166 |
req->issue_timeout = timeout; |
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167 |
} |
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|
168 |
|
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169 |
/*****************************************************************************/ |
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|
170 |
|
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171 |
uint8_t *ec_foe_request_data(ec_foe_request_t *req) |
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172 |
{ |
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173 |
return req->buffer; |
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174 |
} |
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|
175 |
|
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176 |
/*****************************************************************************/ |
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|
177 |
|
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178 |
size_t ec_foe_request_data_size(const ec_foe_request_t *req) |
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179 |
{ |
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180 |
return req->data_size; |
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181 |
} |
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|
182 |
|
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183 |
/*****************************************************************************/ |
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|
184 |
|
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185 |
void ec_foe_request_read(ec_foe_request_t *req) |
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186 |
{ |
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187 |
req->dir = EC_DIR_INPUT; |
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188 |
req->state = EC_INT_REQUEST_QUEUED; |
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189 |
req->result = FOE_BUSY; |
1335
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190 |
req->jiffies_start = jiffies; |
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191 |
} |
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|
192 |
|
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193 |
/*****************************************************************************/ |
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|
194 |
|
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195 |
void ec_foe_request_write(ec_foe_request_t *req) |
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196 |
{ |
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197 |
req->dir = EC_DIR_OUTPUT; |
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198 |
req->state = EC_INT_REQUEST_QUEUED; |
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199 |
req->result = FOE_BUSY; |
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200 |
req->jiffies_start = jiffies; |
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201 |
} |
09c6fce1ae45
merge -c1616 branches/1.4-foe: Included FoE patch from Olav Zarges.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
202 |
|
09c6fce1ae45
merge -c1616 branches/1.4-foe: Included FoE patch from Olav Zarges.
Florian Pose <fp@igh-essen.com>
parents:
diff
changeset
|
203 |
/*****************************************************************************/ |