Mercurial > flash_v2

annotate packages/io/usb/slave/current/src/usbs.c @ 1777:c16341b1bac6 default tip

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* Added execute permissions to files missed in conversion from CVS
author alexs
date Mon, 12 Oct 2009 02:26:09 +0100
parents d2c90368aeef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 //==========================================================================
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2 //
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3 // usbs.c
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4 //
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5 // Generic USB slave-side support
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6 //
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7 //==========================================================================
208
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
208
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
151
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): bartv
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44 // Contributors: bartv
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45 // Date: 2000-10-04
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46 //
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47 //####DESCRIPTIONEND####
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48 //
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49 //==========================================================================
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50
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51 #include <pkgconf/system.h>
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52 #include <cyg/infra/cyg_type.h>
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53 #include <cyg/infra/cyg_ass.h>
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54 #include <cyg/infra/cyg_trac.h>
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55 #include <cyg/infra/diag.h>
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56 #include <cyg/io/usb/usbs.h>
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57 #include <cyg/hal/drv_api.h>
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58
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59 // ----------------------------------------------------------------------------
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60 // Devtab entry support. This code can be compiled with no overheads as
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61 // long as the necessary support package is in place.
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62 #ifdef CYGPKG_IO
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63 # include <cyg/io/io.h>
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64 # include <cyg/io/devtab.h>
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65 // ----------------------------------------------------------------------------
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66 // read()/write() functions applied to USB endpoints. These just
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67 // indirect via the usbs_endpoint structures and wait for the
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68 // callback to happen.
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69
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70 typedef struct usbs_callback_data {
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71 bool completed;
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72 int result;
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73 cyg_drv_mutex_t lock;
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74 cyg_drv_cond_t signal;
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75 } usbs_callback_data;
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76
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77 static void
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78 usbs_devtab_callback(void* arg, int result)
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79 {
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80 usbs_callback_data* callback_data = (usbs_callback_data*) arg;
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81 callback_data->result = result;
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82 callback_data->completed = true;
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83 cyg_drv_cond_signal(&(callback_data->signal));
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84 }
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85
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86 Cyg_ErrNo
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87 usbs_devtab_cwrite(cyg_io_handle_t handle, const void* buf, cyg_uint32* size)
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88 {
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89 usbs_callback_data wait;
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90 cyg_devtab_entry_t* devtab_entry;
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91 usbs_tx_endpoint* endpoint;
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92 int result = ENOERR;
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93
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94 CYG_REPORT_FUNCTION();
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95
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96 wait.completed = 0;
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97 cyg_drv_mutex_init(&wait.lock);
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98 cyg_drv_cond_init(&wait.signal, &wait.lock);
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99
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100 devtab_entry = (cyg_devtab_entry_t*) handle;
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101 CYG_CHECK_DATA_PTR( devtab_entry, "A valid endpoint must be supplied");
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102 endpoint = (usbs_tx_endpoint*) devtab_entry->priv;
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103
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104 CYG_CHECK_DATA_PTR( endpoint, "The handle must correspond to a USB endpoint");
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105 CYG_CHECK_FUNC_PTR( endpoint->start_tx_fn, "The endpoint must have a start_tx function");
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106
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107 endpoint->buffer = (unsigned char*) buf;
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108 endpoint->buffer_size = (int) *size;
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109 endpoint->complete_fn = &usbs_devtab_callback;
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110 endpoint->complete_data = (void*) &wait;
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111 (*endpoint->start_tx_fn)(endpoint);
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112
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113 cyg_drv_mutex_lock(&wait.lock);
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114 while (!wait.completed) {
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115 cyg_drv_cond_wait(&wait.signal);
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116 }
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117 cyg_drv_mutex_unlock(&wait.lock);
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118 if (wait.result < 0) {
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119 result = wait.result;
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120 } else {
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121 *size = wait.result;
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122 }
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123
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124 cyg_drv_cond_destroy(&wait.signal);
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125 cyg_drv_mutex_destroy(&wait.lock);
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126
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127 CYG_REPORT_RETURN();
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128 return result;
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129 }
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130
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131 Cyg_ErrNo
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132 usbs_devtab_cread(cyg_io_handle_t handle, void* buf, cyg_uint32* size)
151
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133 {
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134 usbs_callback_data wait;
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135 cyg_devtab_entry_t* devtab_entry;
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136 usbs_rx_endpoint* endpoint;
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137 int result = ENOERR;
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138
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139 CYG_REPORT_FUNCTION();
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140
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141 wait.completed = 0;
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142 cyg_drv_mutex_init(&wait.lock);
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143 cyg_drv_cond_init(&wait.signal, &wait.lock);
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144
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145 devtab_entry = (cyg_devtab_entry_t*) handle;
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146 CYG_CHECK_DATA_PTR( devtab_entry, "A valid endpoint must be supplied");
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147 endpoint = (usbs_rx_endpoint*) devtab_entry->priv;
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148
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149 CYG_CHECK_DATA_PTR( endpoint, "The handle must correspond to a USB endpoint");
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150 CYG_CHECK_FUNC_PTR( endpoint->start_rx_fn, "The endpoint must have a start_rx function");
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151
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152 endpoint->buffer = (unsigned char*) buf;
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153 endpoint->buffer_size = (int) *size;
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154 endpoint->complete_fn = &usbs_devtab_callback;
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155 endpoint->complete_data = (void*) &wait;
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156 (*endpoint->start_rx_fn)(endpoint);
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157 cyg_drv_mutex_lock(&wait.lock);
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158 while (!wait.completed) {
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159 cyg_drv_cond_wait(&wait.signal);
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160 }
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161 cyg_drv_mutex_unlock(&wait.lock);
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162 if (wait.result < 0) {
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163 result = wait.result;
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164 } else {
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165 *size = wait.result;
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166 }
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167
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168 cyg_drv_cond_destroy(&wait.signal);
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169 cyg_drv_mutex_destroy(&wait.lock);
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170
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171 CYG_REPORT_RETURN();
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172 return result;
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173 }
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174
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175 // ----------------------------------------------------------------------------
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176 // More devtab functions, this time related to ioctl() style operations.
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177 Cyg_ErrNo
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178 usbs_devtab_get_config(cyg_io_handle_t handle, cyg_uint32 code, void* buf, cyg_uint32* size)
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179 {
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180 return -EINVAL;
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181 }
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182
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183 Cyg_ErrNo
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184 usbs_devtab_set_config(cyg_io_handle_t handle, cyg_uint32 code, const void* buf, cyg_uint32* size)
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185 {
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186 return -EINVAL;
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187 }
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188
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189 #endif // CYGPKG_IO
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190
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191 // ----------------------------------------------------------------------------
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192 // USB-specific functions that are useful for applications/packages which
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193 // do not want to use the devtab interface. These may get called in DSR
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194 // context.
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195
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196 void
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197 usbs_start_rx(usbs_rx_endpoint* endpoint)
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198 {
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199 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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200 CYG_CHECK_FUNC_PTR( endpoint->start_rx_fn, "The USB endpoint must support receive operations");
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201 (*endpoint->start_rx_fn)(endpoint);
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202 }
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203
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204 void
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205 usbs_start_rx_buffer(usbs_rx_endpoint* endpoint,
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206 unsigned char* buf, int size,
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207 void (*callback_fn)(void *, int), void* callback_arg)
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208 {
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209 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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210 CYG_CHECK_FUNC_PTR( endpoint->start_rx_fn, "The USB endpoint must support receive operations");
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211
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212 endpoint->buffer = buf;
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213 endpoint->buffer_size = size;
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214 endpoint->complete_fn = callback_fn;
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215 endpoint->complete_data = callback_arg;
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216 (*endpoint->start_rx_fn)(endpoint);
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217 }
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218
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219 void
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220 usbs_start_tx(usbs_tx_endpoint* endpoint)
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221 {
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222 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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223 CYG_CHECK_FUNC_PTR( endpoint->start_tx_fn, "The USB endpoint must support receive operations");
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224 (*endpoint->start_tx_fn)(endpoint);
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225 }
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226
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227 void
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228 usbs_start_tx_buffer(usbs_tx_endpoint* endpoint,
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229 const unsigned char* buf, int size,
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230 void (*callback_fn)(void*, int), void *callback_arg)
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231 {
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232 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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233 CYG_CHECK_FUNC_PTR( endpoint->start_tx_fn, "The USB endpoint must support receive operations");
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234
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235 endpoint->buffer = buf;
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236 endpoint->buffer_size = size;
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237 endpoint->complete_fn = callback_fn;
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238 endpoint->complete_data = callback_arg;
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239 (*endpoint->start_tx_fn)(endpoint);
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240 }
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241
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242 void
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243 usbs_start(usbs_control_endpoint* endpoint)
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244 {
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245 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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246 CYG_CHECK_FUNC_PTR( endpoint->start_fn, "The USB endpoint should have a start function");
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247
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248 (*endpoint->start_fn)(endpoint);
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249 }
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250
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251 cyg_bool
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252 usbs_rx_endpoint_halted(usbs_rx_endpoint* endpoint)
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253 {
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254 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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255 return endpoint->halted;
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256 }
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257
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258 cyg_bool
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259 usbs_tx_endpoint_halted(usbs_tx_endpoint* endpoint)
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260 {
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261 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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262 return endpoint->halted;
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263 }
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264
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265 void
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266 usbs_set_rx_endpoint_halted(usbs_rx_endpoint* endpoint, cyg_bool halted)
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267 {
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268 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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269 CYG_CHECK_FUNC_PTR( endpoint->set_halted_fn, "The USB endpoint should have a set-halted function");
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270 (*endpoint->set_halted_fn)(endpoint, halted);
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271 }
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272
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273 void
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274 usbs_set_tx_endpoint_halted(usbs_tx_endpoint* endpoint, cyg_bool halted)
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275 {
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276 CYG_CHECK_DATA_PTR( endpoint, "A valid USB endpoint must be supplied");
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277 CYG_CHECK_FUNC_PTR( endpoint->set_halted_fn, "The USB endpoint should have a set-halted function");
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278 (*endpoint->set_halted_fn)(endpoint, halted);
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279 }
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280
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281 void
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282 usbs_start_rx_endpoint_wait(usbs_rx_endpoint* endpoint, void (*callback_fn)(void*, int), void* callback_data)
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283 {
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284 endpoint->buffer = (unsigned char*) 0;
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285 endpoint->buffer_size = 0;
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286 endpoint->complete_fn = callback_fn;
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287 endpoint->complete_data = callback_data;
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288 (*endpoint->start_rx_fn)(endpoint);
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289 }
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290
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291 void
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292 usbs_start_tx_endpoint_wait(usbs_tx_endpoint* endpoint, void (*callback_fn)(void*, int), void* callback_data)
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293 {
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294 endpoint->buffer = (unsigned char*) 0;
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295 endpoint->buffer_size = 0;
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296 endpoint->complete_fn = callback_fn;
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297 endpoint->complete_data = callback_data;
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298 (*endpoint->start_tx_fn)(endpoint);
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299 }
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300
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301
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302 // ----------------------------------------------------------------------------
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303 // Handling of standard control messages. This will be invoked by
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304 // a USB device driver, usually at DSR level, to process any control
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305 // messages that cannot be handled by the hardware itself and that
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306 // have also not been handled by the application-specific handler
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307 // (if any).
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308 //
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309 // Because this function can run at DSR level performance is important.
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310 //
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311 // The various standard control messages are affected as follows:
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312 //
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313 // clear-feature: nothing can be done here about device requests to
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314 // disable remote-wakeup or about endpoint halt requests. It appears
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315 // to be legal to clear no features on an interface.
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316 //
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317 // get-configuration: if the device is not configured a single byte 0
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318 // should be returned. Otherwise this code assumes only one configuration
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319 // is supported and its id can be extracted from the enumeration data.
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320 // For more complicated devices get-configuration has to be handled
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321 // at a higher-level.
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322 //
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323 // get-descriptor: this is the big one. It is used to obtain
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324 // the enumeration data. An auxiliary refill function is needed.
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325 //
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326 // get-interface: this can be used to identify the current variant
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327 // for a given interface within a configuration. For simple devices
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328 // there will be only interface, 0. For anything more complicated
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329 // higher level code will have to take care of the request.
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330 //
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331 // get-status. Much the same as clear-feature.
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332 //
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333 // set-address. Must be handled at the device driver level.
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334 //
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335 // set-configuration: a value of 0 is used to deconfigure the device,
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336 // which can be handled here. Otherwise this code assumes that only
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337 // a single configuration is supported and enables that. For anything
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338 // more complicated higher-level code has to handle this request.
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339 //
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340 // set-descriptor: used to update the enumeration data. This is not
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341 // supported here, although higher-level code can choose to do so.
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342 //
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343 // set-feature. See clear-feature and get-status.
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344 //
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345 // set-interface. Variant interfaces are not supported by the
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346 // base code so this request has to be handled at a higher level.
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347 //
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348 // synch-frame. This is only relevant for isochronous transfers
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349 // which are not yet supported, and anyway it is not clear what
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350 // could be done about these requests here.
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351
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352 // This refill function handles GET_DESCRIPTOR requests for a
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353 // configuration. For details of the control_buffer usage see
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354 // the relevant code in the main callback.
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355 static void
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356 usbs_configuration_descriptor_refill(usbs_control_endpoint* endpoint)
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357 {
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358 usb_devreq* req = (usb_devreq*) endpoint->control_buffer;
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359 int length = (req->length_hi << 8) | req->length_lo;
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360 int sent = (req->index_hi << 8) | req->index_lo;
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361 int current_interface = req->type;
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362 int last_interface = req->request;
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363 int current_endpoint = req->value_lo;
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364 int last_endpoint = req->value_hi;
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365 cyg_bool done = false;
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366
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367 if (current_endpoint == last_endpoint) {
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368 // The next transfer should be a single interface - unless we have already finished.
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369 if (current_interface == last_interface) {
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370 done = true;
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371 } else {
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372 endpoint->buffer = (unsigned char*) &(endpoint->enumeration_data->interfaces[current_interface]);
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373 if (USB_INTERFACE_DESCRIPTOR_LENGTH >= (length - sent)) {
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374 endpoint->buffer_size = length - sent;
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375 done = true;
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376 } else {
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377 endpoint->buffer_size = USB_INTERFACE_DESCRIPTOR_LENGTH;
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378 sent += USB_INTERFACE_DESCRIPTOR_LENGTH;
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379 // Note that an interface with zero endpoints is ok. We'll just move
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380 // to the next interface in the next call.
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381 last_endpoint = current_endpoint +
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382 endpoint->enumeration_data->interfaces[current_interface].number_endpoints;
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383 current_interface++;
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384 }
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385 }
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386 } else {
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387 // The next transfer should be a single endpoint. The
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388 // endpoints are actually contiguous array elements
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389 // but may not be packed, so they have to be transferred
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390 // one at a time.
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391 endpoint->buffer = (unsigned char*) &(endpoint->enumeration_data->endpoints[current_endpoint]);
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392 if ((sent + USB_ENDPOINT_DESCRIPTOR_LENGTH) >= length) {
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393 endpoint->buffer_size = length - sent;
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394 done = true;
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395 } else {
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396 endpoint->buffer_size = USB_ENDPOINT_DESCRIPTOR_LENGTH;
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397 current_endpoint ++;
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398 }
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399 }
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400
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401 if (done) {
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402 endpoint->fill_buffer_fn = (void (*)(usbs_control_endpoint*)) 0;
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403 } else {
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404 req->type = (unsigned char) current_interface;
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405 req->value_lo = (unsigned char) current_endpoint;
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406 req->value_hi = (unsigned char) last_endpoint;
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407 req->index_hi = (unsigned char) (sent >> 8);
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408 req->index_lo = (unsigned char) (sent & 0x00FF);
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409 }
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410 }
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411
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412 usbs_control_return
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413 usbs_handle_standard_control(usbs_control_endpoint* endpoint)
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414 {
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415 usbs_control_return result = USBS_CONTROL_RETURN_UNKNOWN;
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416 usb_devreq* req = (usb_devreq*) endpoint->control_buffer;
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417 int length;
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418 int direction;
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419 int recipient;
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420
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421 length = (req->length_hi << 8) | req->length_lo;
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422 direction = req->type & USB_DEVREQ_DIRECTION_MASK;
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423 recipient = req->type & USB_DEVREQ_RECIPIENT_MASK;
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424
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425 if (USB_DEVREQ_CLEAR_FEATURE == req->request) {
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426
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427 if (USB_DEVREQ_RECIPIENT_INTERFACE == recipient) {
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428 // The host should expect no data back, the device must
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429 // be configured, and there are no defined features to clear.
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430 if ((0 == length) &&
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431 (USBS_STATE_CONFIGURED == (endpoint->state & USBS_STATE_MASK)) &&
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432 (0 == req->value_lo)) {
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diff changeset
433
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434 int interface_id = req->index_lo;
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435 CYG_ASSERT( 1 == endpoint->enumeration_data->total_number_interfaces, \
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436 "Higher level code should have handled this request");
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437
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438 if (interface_id == endpoint->enumeration_data->interfaces[0].interface_id) {
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439 result = USBS_CONTROL_RETURN_HANDLED;
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440 } else {
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441 result = USBS_CONTROL_RETURN_STALL;
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442 }
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diff changeset
443
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444 } else {
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445 result = USBS_CONTROL_RETURN_STALL;
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446 }
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447 }
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448
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449 } else if (USB_DEVREQ_GET_CONFIGURATION == req->request) {
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450
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451 // Return a single byte 0 if the device is not currently
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jlarmour
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452 // configured. Otherwise assume a single configuration
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453 // in the enumeration data and return its id.
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454 if ((1 == length) && (USB_DEVREQ_DIRECTION_IN == direction)) {
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455
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456 if (USBS_STATE_CONFIGURED == (endpoint->state & USBS_STATE_MASK)) {
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457 CYG_ASSERT( 1 == endpoint->enumeration_data->device.number_configurations, \
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458 "Higher level code should have handled this request");
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459 endpoint->control_buffer[0] = endpoint->enumeration_data->configurations[0].configuration_id;
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460 } else {
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461 endpoint->control_buffer[0] = 0;
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462 }
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463 endpoint->buffer = endpoint->control_buffer;
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464 endpoint->buffer_size = 1;
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465 endpoint->fill_buffer_fn = (void (*)(usbs_control_endpoint*)) 0;
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466 endpoint->complete_fn = (usbs_control_return (*)(usbs_control_endpoint*, cyg_bool)) 0;
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467 result = USBS_CONTROL_RETURN_HANDLED;
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468
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469 } else {
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470 result = USBS_CONTROL_RETURN_STALL;
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471 }
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472
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473 } else if (USB_DEVREQ_GET_DESCRIPTOR == req->request) {
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474
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jlarmour
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475 // The descriptor type is in value_hi. The descriptor index
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jlarmour
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476 // is in value_lo.
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jlarmour
parents:
diff changeset
477 // The hsot must expect at least one byte of data.
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478 if ((0 == length) || (USB_DEVREQ_DIRECTION_IN != direction)) {
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479
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480 result = USBS_CONTROL_RETURN_STALL;
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diff changeset
481
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482 } else if (USB_DEVREQ_DESCRIPTOR_TYPE_DEVICE == req->value_hi) {
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483
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484 // The device descriptor is easy, it is a single field in the
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485 // enumeration data.
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486 endpoint->buffer = (unsigned char*) &(endpoint->enumeration_data->device);
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487 endpoint->fill_buffer_fn = (void (*)(usbs_control_endpoint*)) 0;
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488 endpoint->complete_fn = (usbs_control_return (*)(usbs_control_endpoint*, cyg_bool)) 0;
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489 if (length < USB_DEVICE_DESCRIPTOR_LENGTH) {
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490 endpoint->buffer_size = length;
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491 } else {
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492 endpoint->buffer_size = USB_DEVICE_DESCRIPTOR_LENGTH;
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493 }
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494 result = USBS_CONTROL_RETURN_HANDLED;
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495
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496 } else if (USB_DEVREQ_DESCRIPTOR_TYPE_CONFIGURATION == req->value_hi) {
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497
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498 // This is where things get messy. We need to supply the
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diff changeset
499 // specified configuration data, followed by some number of
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diff changeset
500 // interfaces and endpoints. Plus there are length limits
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501 // to consider. First check that the specified index is valid.
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502 if (req->value_lo >= endpoint->enumeration_data->device.number_configurations) {
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503 result = USBS_CONTROL_RETURN_STALL;
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504 } else {
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jlarmour
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diff changeset
505 // No such luck. OK, supplying the initial block is easy.
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506 endpoint->buffer = (unsigned char*) &(endpoint->enumeration_data->configurations[req->value_lo]);
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507 endpoint->complete_fn = (usbs_control_return (*)(usbs_control_endpoint*, cyg_bool)) 0;
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diff changeset
508
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jlarmour
parents:
diff changeset
509 // How much data was actually requested. If only the
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jlarmour
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diff changeset
510 // configuration itself is of interest then there is
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jlarmour
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511 // no need to worry about the rest.
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512 if (length <= USB_CONFIGURATION_DESCRIPTOR_LENGTH) {
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513 endpoint->buffer_size = length;
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514 endpoint->fill_buffer_fn = (void (*)(usbs_control_endpoint*)) 0;
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515 } else {
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516 int i, j;
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517 int start_interface;
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518 int start_endpoint;
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519 endpoint->buffer_size = USB_CONFIGURATION_DESCRIPTOR_LENGTH;
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520 endpoint->fill_buffer_fn = &usbs_configuration_descriptor_refill;
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521
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jlarmour
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522 // The descriptor refill_fn needs to know what next to transfer.
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jlarmour
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diff changeset
523 // The desired interfaces and endpoints will be contiguous so
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jlarmour
parents:
diff changeset
524 // we need to keep track of the following:
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jlarmour
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diff changeset
525 // 1) the current interface index being transferred.
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jlarmour
parents:
diff changeset
526 // 2) the last interface that should be transferred.
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jlarmour
parents:
diff changeset
527 // 3) the current endpoint index that should be transferred.
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jlarmour
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diff changeset
528 // 4) the last endpoint index. This marks interface/endpoint transitions.
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jlarmour
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diff changeset
529 // 5) how much has been transferred to date.
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jlarmour
parents:
diff changeset
530 // This information can be held in the control_buffer,
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jlarmour
parents:
diff changeset
531 // with the length field being preserved.
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532 start_interface = 0;
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diff changeset
533 start_endpoint = 0;
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jlarmour
parents:
diff changeset
534 // For all configurations up to the desired one.
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535 for (i = 0; i < req->value_lo; i++) {
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parents:
diff changeset
536 int config_interfaces = endpoint->enumeration_data->configurations[i].number_interfaces;
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jlarmour
parents:
diff changeset
537
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jlarmour
parents:
diff changeset
538 // For all interfaces in this configuration.
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jlarmour
parents:
diff changeset
539 for (j = 0; j < config_interfaces; j++) {
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jlarmour
parents:
diff changeset
540 // Add the number of endpoints in this interface to the current count.
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diff changeset
541 CYG_ASSERT( (j + start_interface) < endpoint->enumeration_data->total_number_interfaces, \
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diff changeset
542 "Valid interface count in enumeration data");
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diff changeset
543 start_endpoint += endpoint->enumeration_data->interfaces[j + start_interface].number_endpoints;
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diff changeset
544 }
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jlarmour
parents:
diff changeset
545 // And update the index for the starting interface.
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jlarmour
parents:
diff changeset
546 start_interface += config_interfaces;
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diff changeset
547 }
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diff changeset
548 CYG_ASSERT( start_interface < endpoint->enumeration_data->total_number_interfaces, \
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parents:
diff changeset
549 "Valid interface count in enumeration data");
184
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diff changeset
550 CYG_ASSERT( ((0 == endpoint->enumeration_data->total_number_endpoints) && (0 == start_endpoint)) || \
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parents: 165
diff changeset
551 (start_endpoint < endpoint->enumeration_data->total_number_endpoints), \
151
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diff changeset
552 "Valid endpoint count in enumeration data");
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jlarmour
parents:
diff changeset
553
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jlarmour
parents:
diff changeset
554 req->type = (unsigned char) start_interface;
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diff changeset
555 req->request = (unsigned char) (start_interface +
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diff changeset
556 endpoint->enumeration_data->configurations[req->value_lo].number_interfaces
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jlarmour
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diff changeset
557 );
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diff changeset
558 req->value_lo = (unsigned char) start_endpoint;
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jlarmour
parents:
diff changeset
559 req->value_hi = (unsigned char) start_endpoint;
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jlarmour
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diff changeset
560 req->index_lo = USB_CONFIGURATION_DESCRIPTOR_LENGTH;
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diff changeset
561 req->index_hi = 0;
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diff changeset
562 }
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diff changeset
563 result = USBS_CONTROL_RETURN_HANDLED;
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jlarmour
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diff changeset
564 }
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jlarmour
parents:
diff changeset
565
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jlarmour
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diff changeset
566
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jlarmour
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diff changeset
567 } else if (USB_DEVREQ_DESCRIPTOR_TYPE_STRING == req->value_hi) {
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jlarmour
parents:
diff changeset
568
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jlarmour
parents:
diff changeset
569 // As long as the index is valid, the rest is easy since
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jlarmour
parents:
diff changeset
570 // the strings are just held in a simple array.
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jlarmour
parents:
diff changeset
571 // NOTE: if multiple languages have to be supported
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jlarmour
parents:
diff changeset
572 // then things get more difficult.
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jlarmour
parents:
diff changeset
573 if (req->value_lo >= endpoint->enumeration_data->total_number_strings) {
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jlarmour
parents:
diff changeset
574 result = USBS_CONTROL_RETURN_STALL;
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jlarmour
parents:
diff changeset
575 } else {
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jlarmour
parents:
diff changeset
576 endpoint->buffer = (unsigned char*) endpoint->enumeration_data->strings[req->value_lo];
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jlarmour
parents:
diff changeset
577 endpoint->fill_buffer_fn = (void (*)(usbs_control_endpoint*)) 0;
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jlarmour
parents:
diff changeset
578 endpoint->complete_fn = (usbs_control_return (*)(usbs_control_endpoint*, cyg_bool)) 0;
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jlarmour
parents:
diff changeset
579
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jlarmour
parents:
diff changeset
580 if (length < endpoint->buffer[0]) {
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jlarmour
parents:
diff changeset
581 endpoint->buffer_size = length;
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jlarmour
parents:
diff changeset
582 } else {
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jlarmour
parents:
diff changeset
583 endpoint->buffer_size = endpoint->buffer[0];
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
584 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
585 result = USBS_CONTROL_RETURN_HANDLED;
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jlarmour
parents:
diff changeset
586 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
587
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jlarmour
parents:
diff changeset
588 } else {
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jlarmour
parents:
diff changeset
589 result = USBS_CONTROL_RETURN_STALL;
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jlarmour
parents:
diff changeset
590 }
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jlarmour
parents:
diff changeset
591
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jlarmour
parents:
diff changeset
592 } else if (USB_DEVREQ_GET_INTERFACE == req->request) {
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jlarmour
parents:
diff changeset
593
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
594 if ((1 != length) ||
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jlarmour
parents:
diff changeset
595 (USB_DEVREQ_DIRECTION_IN != direction) ||
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jlarmour
parents:
diff changeset
596 (USBS_STATE_CONFIGURED != (endpoint->state & USBS_STATE_MASK))) {
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jlarmour
parents:
diff changeset
597
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jlarmour
parents:
diff changeset
598 result = USBS_CONTROL_RETURN_STALL;
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jlarmour
parents:
diff changeset
599
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
600 } else {
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jlarmour
parents:
diff changeset
601 int interface_id;
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jlarmour
parents:
diff changeset
602
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jlarmour
parents:
diff changeset
603 CYG_ASSERT( (1 == endpoint->enumeration_data->device.number_configurations) && \
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jlarmour
parents:
diff changeset
604 (1 == endpoint->enumeration_data->total_number_interfaces), \
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jlarmour
parents:
diff changeset
605 "Higher level code should have handled this request");
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jlarmour
parents:
diff changeset
606
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jlarmour
parents:
diff changeset
607 interface_id = (req->index_hi << 8) | req->index_lo;
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jlarmour
parents:
diff changeset
608 if (interface_id != endpoint->enumeration_data->interfaces[0].interface_id) {
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jlarmour
parents:
diff changeset
609 result = USBS_CONTROL_RETURN_STALL;
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jlarmour
parents:
diff changeset
610 } else {
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jlarmour
parents:
diff changeset
611 endpoint->control_buffer[0] = endpoint->enumeration_data->interfaces[0].alternate_setting;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
612 endpoint->buffer = endpoint->control_buffer;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
613 endpoint->buffer_size = 1;
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jlarmour
parents:
diff changeset
614 endpoint->fill_buffer_fn = (void (*)(usbs_control_endpoint*)) 0;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
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diff changeset
615 endpoint->complete_fn = (usbs_control_return (*)(usbs_control_endpoint*, cyg_bool)) 0;
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parents:
diff changeset
616 result = USBS_CONTROL_RETURN_HANDLED;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
617 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
618 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
619
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jlarmour
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diff changeset
620 } else if (USB_DEVREQ_GET_STATUS == req->request) {
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jlarmour
parents:
diff changeset
621
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jlarmour
parents:
diff changeset
622 if (USB_DEVREQ_RECIPIENT_INTERFACE == recipient) {
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jlarmour
parents:
diff changeset
623 // The host should expect two bytes back, the device must
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
624 // be configured, the interface number must be valid.
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jlarmour
parents:
diff changeset
625 // The host should expect no data back, the device must
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
626 // be configured, and there are no defined features to clear.
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jlarmour
parents:
diff changeset
627 if ((2 == length) &&
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jlarmour
parents:
diff changeset
628 (USB_DEVREQ_DIRECTION_IN == direction) &&
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jlarmour
parents:
diff changeset
629 (USBS_STATE_CONFIGURED == (endpoint->state & USBS_STATE_MASK))) {
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jlarmour
parents:
diff changeset
630
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jlarmour
parents:
diff changeset
631 int interface_id = req->index_lo;
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jlarmour
parents:
diff changeset
632 CYG_ASSERT( 1 == endpoint->enumeration_data->total_number_interfaces, \
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jlarmour
parents:
diff changeset
633 "Higher level code should have handled this request");
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jlarmour
parents:
diff changeset
634
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jlarmour
parents:
diff changeset
635 if (interface_id == endpoint->enumeration_data->interfaces[0].interface_id) {
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jlarmour
parents:
diff changeset
636
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jlarmour
parents:
diff changeset
637 // The request is legit, but there are no defined features for an interface...
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jlarmour
parents:
diff changeset
638 endpoint->control_buffer[0] = 0;
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jlarmour
parents:
diff changeset
639 endpoint->control_buffer[1] = 0;
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jlarmour
parents:
diff changeset
640 endpoint->buffer = endpoint->control_buffer;
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jlarmour
parents:
diff changeset
641 endpoint->buffer_size = 2;
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jlarmour
parents:
diff changeset
642 endpoint->fill_buffer_fn = (void (*)(usbs_control_endpoint*)) 0;
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jlarmour
parents:
diff changeset
643 endpoint->complete_fn = (usbs_control_return (*)(usbs_control_endpoint*, cyg_bool)) 0;
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jlarmour
parents:
diff changeset
644 result = USBS_CONTROL_RETURN_HANDLED;
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jlarmour
parents:
diff changeset
645
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jlarmour
parents:
diff changeset
646 } else {
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jlarmour
parents:
diff changeset
647 result = USBS_CONTROL_RETURN_STALL;
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jlarmour
parents:
diff changeset
648 }
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jlarmour
parents:
diff changeset
649 } else {
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jlarmour
parents:
diff changeset
650 result = USBS_CONTROL_RETURN_STALL;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
651 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
652 }
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jlarmour
parents:
diff changeset
653
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jlarmour
parents:
diff changeset
654 } else if (USB_DEVREQ_SET_CONFIGURATION == req->request) {
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jlarmour
parents:
diff changeset
655
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jlarmour
parents:
diff changeset
656 // Changing to configuration 0 means a state change from
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
657 // configured to addressed. Changing to anything else means a
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
658 // state change to configured. Both involve invoking the
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
659 // state change callback. If there are multiple configurations
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
660 // to choose from then this request has to be handled at
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
661 // a higher level.
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
662 int old_state = endpoint->state;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
663 if (0 == req->value_lo) {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
664 endpoint->state = USBS_STATE_ADDRESSED;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
665 if ((void (*)(usbs_control_endpoint*, void*, usbs_state_change, int))0 != endpoint->state_change_fn) {
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jlarmour
parents:
diff changeset
666 (*endpoint->state_change_fn)(endpoint, endpoint->state_change_data,
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jlarmour
parents:
diff changeset
667 USBS_STATE_CHANGE_DECONFIGURED, old_state);
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
668 }
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jlarmour
parents:
diff changeset
669 result = USBS_CONTROL_RETURN_HANDLED;
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jlarmour
parents:
diff changeset
670
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jlarmour
parents:
diff changeset
671 } else {
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jlarmour
parents:
diff changeset
672 CYG_ASSERT(1 == endpoint->enumeration_data->device.number_configurations, \
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jlarmour
parents:
diff changeset
673 "Higher level code should have handled this request");
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
674 if (req->value_lo == endpoint->enumeration_data->configurations[0].configuration_id) {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
675 endpoint->state = USBS_STATE_CONFIGURED;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
676 if ((void (*)(usbs_control_endpoint*, void*, usbs_state_change, int))0 != endpoint->state_change_fn) {
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jlarmour
parents:
diff changeset
677 (*endpoint->state_change_fn)(endpoint, endpoint->state_change_data,
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jlarmour
parents:
diff changeset
678 USBS_STATE_CHANGE_CONFIGURED, old_state);
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
679 }
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jlarmour
parents:
diff changeset
680 result = USBS_CONTROL_RETURN_HANDLED;
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jlarmour
parents:
diff changeset
681 } else {
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jlarmour
parents:
diff changeset
682 result = USBS_CONTROL_RETURN_STALL;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
683 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
684 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
685
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
686 } else if (USB_DEVREQ_SET_FEATURE == req->request) {
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jlarmour
parents:
diff changeset
687
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
688 if (USB_DEVREQ_RECIPIENT_INTERFACE == recipient) {
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jlarmour
parents:
diff changeset
689 // The host should expect no data back, the device must
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
690 // be configured, and there are no defined features to clear.
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
691 if ((0 == length) &&
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
692 (USBS_STATE_CONFIGURED == (endpoint->state & USBS_STATE_MASK)) &&
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
693 (0 == req->value_lo)) {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
694
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
695 int interface_id = req->index_lo;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
696 CYG_ASSERT( 1 == endpoint->enumeration_data->total_number_interfaces, \
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
697 "Higher level code should have handled this request");
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
698
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
699 if (interface_id == endpoint->enumeration_data->interfaces[0].interface_id) {
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jlarmour
parents:
diff changeset
700 result = USBS_CONTROL_RETURN_HANDLED;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
701 } else {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
702 result = USBS_CONTROL_RETURN_STALL;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
703 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
704
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
705 } else {
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
706 result = USBS_CONTROL_RETURN_STALL;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
707 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
708 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
709
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
710 }
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
711
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
712 return result;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents:
diff changeset
713 }