1 | /*****************************************************************************/
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2 | // midi usb driver
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3 | // Written by Jérôme Duval
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4 | //
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5 | // usb_midi.c
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6 | //
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7 | // Copyright (c) 2006 Haiku Project
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8 | //
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9 | // Some portions of code are copyrighted by
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10 | // USB Joystick driver for BeOS R5
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11 | // Copyright 2000 (C) ITO, Takayuki
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12 | // All rights reserved
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13 | //
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14 | // Permission is hereby granted, free of charge, to any person obtaining a
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15 | // copy of this software and associated documentation files (the "Software"),
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16 | // to deal in the Software without restriction, including without limitation
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17 | // the rights to use, copy, modify, merge, publish, distribute, sublicense,
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18 | // and/or sell copies of the Software, and to permit persons to whom the
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19 | // Software is furnished to do so, subject to the following conditions:
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20 | //
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21 | // The above copyright notice and this permission notice shall be included
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22 | // in all copies or substantial portions of the Software.
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23 | //
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24 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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25 | // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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26 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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27 | // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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28 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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29 | // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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30 | // DEALINGS IN THE SOFTWARE.
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31 | /*****************************************************************************/
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32 | #include <support/Debug.h>
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33 | #include <stdlib.h>
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34 | #include <string.h>
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35 | #include <unistd.h>
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36 | #include "usb_midi.h"
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37 | #include "usbdevs.h"
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38 | #include "usbdevs_data.h"
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39 |
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40 | static int midi_device_number = 0;
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41 | const char *midi_base_name = "midi/usb/";
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42 |
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43 | my_device_info *
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44 | create_device(const usb_device *dev, const usb_interface_info *ii, uint16 ifno)
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45 | {
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46 | my_device_info *my_dev = NULL;
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47 | int number;
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48 | area_id area;
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49 | sem_id sem;
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50 | char area_name [32];
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51 | const char *base_name;
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52 |
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53 | assert (usb != NULL && dev != NULL);
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54 |
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55 | number = midi_device_number++;
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56 | base_name = midi_base_name;
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57 |
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58 | my_dev = malloc (sizeof (my_device_info));
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59 | if (my_dev == NULL)
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60 | return NULL;
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61 |
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62 | my_dev->sem_cb = sem = create_sem (0, DRIVER_NAME "_cb");
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63 | if (sem < 0) {
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64 | DPRINTF_ERR ((MY_ID "create_sem() failed %d\n", (int) sem));
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65 | free (my_dev);
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66 | return NULL;
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67 | }
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68 |
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69 | my_dev->sem_lock = sem = create_sem (1, DRIVER_NAME "_lock");
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70 | if (sem < 0) {
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71 | DPRINTF_ERR ((MY_ID "create_sem() failed %d\n", (int) sem));
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72 | delete_sem (my_dev->sem_cb);
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73 | free (my_dev);
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74 | return NULL;
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75 | }
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76 |
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77 | sprintf (area_name, DRIVER_NAME "_buffer%d", number);
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78 | my_dev->buffer_area = area = create_area (area_name,
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79 | (void **) &my_dev->buffer, B_ANY_KERNEL_ADDRESS,
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80 | B_PAGE_SIZE, B_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
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81 | if (area < 0) {
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82 | DPRINTF_ERR ((MY_ID "create_area() failed %d\n", (int) area));
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83 | delete_sem (my_dev->sem_cb);
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84 | delete_sem (my_dev->sem_lock);
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85 | free (my_dev);
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86 | return NULL;
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87 | }
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88 |
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89 | sprintf(my_dev->name, "%s%d", base_name, number);
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90 | my_dev->dev = dev;
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91 | my_dev->ifno = ifno;
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92 | my_dev->open = 0;
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93 | my_dev->open_fds = NULL;
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94 | my_dev->active = true;
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95 | my_dev->flags = 0;
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96 | my_dev->rbuf = create_ring_buffer(384);
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97 | my_dev->total_report_size = sizeof(usb_midi_event_packet);
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98 |
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99 | return my_dev;
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100 | }
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101 |
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102 | void
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103 | remove_device (my_device_info *my_dev)
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104 | {
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105 | assert (my_dev != NULL);
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106 | if (my_dev->rbuf != NULL) {
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107 | delete_ring_buffer(my_dev->rbuf);
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108 | my_dev->rbuf = NULL;
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109 | }
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110 |
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111 | delete_area (my_dev->buffer_area);
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112 | delete_sem (my_dev->sem_cb);
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113 | delete_sem (my_dev->sem_lock);
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114 | free (my_dev);
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115 | }
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116 |
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117 |
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118 | /* driver cookie (per open) */
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119 |
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120 | typedef struct driver_cookie
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121 | {
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122 | struct driver_cookie *next;
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123 | my_device_info *my_dev;
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124 | } driver_cookie;
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125 |
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126 | /* NB global variables are valid only while driver is loaded */
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127 |
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128 | _EXPORT int32 api_version = B_CUR_DRIVER_API_VERSION;
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129 |
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130 | const char *usb_midi_driver_name = "usb_midi";
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131 |
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132 | usb_module_info *usb;
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133 |
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134 | static void
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135 | interpret_midi_buffer(my_device_info *my_dev)
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136 | {
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137 | usb_midi_event_packet *packet = my_dev->buffer;
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138 |
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139 | ring_buffer_write(my_dev->rbuf, packet->midi, sizeof(packet->midi));
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140 | release_sem_etc(my_dev->sem_cb, 3, B_DO_NOT_RESCHEDULE);
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141 | }
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142 |
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143 |
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144 | /*
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145 | callback: got a report, issue next request
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146 | */
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147 |
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148 | static void
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149 | midi_usb_callback(void *cookie, uint32 status,
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150 | void *data, uint32 actual_len)
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151 | {
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152 | status_t st;
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153 | my_device_info *my_dev = cookie;
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154 |
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155 | assert (cookie != NULL);
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156 | DPRINTF_INFO ((MY_ID "midi_usb_callback()\n"));
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157 |
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158 | acquire_sem (my_dev->sem_lock);
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159 | my_dev->actual_length = actual_len;
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160 | my_dev->bus_status = status; /* B_USB_STATUS_* */
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161 | if (status != B_OK) {
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162 | /* request failed */
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163 | release_sem (my_dev->sem_lock);
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164 | DPRINTF_ERR ((MY_ID "bus status %d\n", (int)status));
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165 | if (status == B_CANCELED) {
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166 | /* cancelled: device is unplugged */
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167 | return;
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168 | }
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169 | #if 0
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170 | st = usb->clear_feature (my_dev->ept->handle, USB_FEATURE_ENDPOINT_HALT);
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171 | if (st != B_OK)
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172 | DPRINTF_ERR ((MY_ID "clear_feature() error %d\n", (int)st));
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173 | #endif
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174 | } else {
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175 | /* got a report */
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176 | //#if 0
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177 | uint32 i;
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178 | char linbuf [256];
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179 | uint8 *buffer = my_dev->buffer;
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180 |
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181 | for (i = 0; i < my_dev->total_report_size; i++)
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182 | sprintf (&linbuf[i*3], "%02X ", buffer [i]);
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183 | DPRINTF_INFO ((MY_ID "report: %s\n", linbuf));
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184 | //#endif
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185 | my_dev->timestamp = system_time ();
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186 |
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187 | interpret_midi_buffer(my_dev);
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188 | release_sem (my_dev->sem_lock);
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189 | }
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190 |
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191 | /* issue next request */
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192 |
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193 | DPRINTF_INFO ((MY_ID "in callback: my_dev = %p endpoint = %p (base %p)\n",
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194 | my_dev, my_dev->ept, *(void **)my_dev));
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195 | if (my_dev->ept == 0xcccccccc) return; /* prevent KDL */
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196 | st = usb->queue_bulk (my_dev->ept->handle, my_dev->buffer,
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197 | my_dev->total_report_size, midi_usb_callback, my_dev);
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198 | if (st != B_OK) {
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199 | /* XXX probably endpoint stall */
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200 | DPRINTF_ERR ((MY_ID "queue_interrupt() error %d\n", (int)st));
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201 | }
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202 | }
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203 |
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204 | /*
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205 | USB specific device hooks
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206 | */
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207 |
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208 | static status_t
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209 | usb_midi_added(const usb_device *dev, void **cookie)
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210 | {
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211 | my_device_info *my_dev;
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212 | const usb_device_descriptor *dev_desc;
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213 | const usb_configuration_info *conf;
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214 | const usb_interface_info *intf;
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215 | status_t st;
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216 | uint16 ifno, i;
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217 | int alt;
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218 |
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219 | assert (dev != NULL && cookie != NULL);
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220 | DPRINTF_INFO ((MY_ID "device_added()\n"));
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221 |
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222 | dev_desc = usb->get_device_descriptor (dev);
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223 |
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224 | DPRINTF_INFO ((MY_ID "vendor ID 0x%04X, product ID 0x%04X\n",
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225 | dev_desc->vendor_id, dev_desc->product_id));
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226 |
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227 | /* check interface class */
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228 |
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229 | if ((conf = usb->get_nth_configuration(dev, DEFAULT_CONFIGURATION)) == NULL) {
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230 | DPRINTF_ERR ((MY_ID "cannot get default configuration\n"));
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231 | return B_ERROR;
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232 | }
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233 |
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234 | for (ifno = 0; ifno < conf->interface_count; ifno++) {
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235 | /* This is C; I can use "class" :-> */
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236 | int class, subclass, protocol;
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237 |
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238 | for (alt = 0; alt < conf->interface[ifno].alt_count; alt++) {
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239 | intf = &conf->interface [ifno].alt[alt];
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240 | class = intf->descr->interface_class;
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241 | subclass = intf->descr->interface_subclass;
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242 | protocol = intf->descr->interface_protocol;
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243 | DPRINTF_INFO ((MY_ID "interface %d, alt : %d: class %d, subclass %d, protocol %d\n",
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244 | ifno, alt, class, subclass, protocol));
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245 |
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246 | if (class == USB_AUDIO_DEVICE_CLASS
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247 | && subclass == USB_AUDIO_INTERFACE_MIDISTREAMING_SUBCLASS)
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248 | goto got_one;
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249 | }
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250 | }
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251 |
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252 | DPRINTF_INFO ((MY_ID "Midi interface not found\n"));
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253 | return B_ERROR;
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254 |
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255 | got_one:
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256 |
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257 | for (i=0; i<sizeof(usb_knowndevs)/sizeof(struct usb_knowndev) ; i++) {
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258 | if (usb_knowndevs[i].vendor == dev_desc->vendor_id
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259 | && usb_knowndevs[i].product == dev_desc->product_id) {
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260 | DPRINTF_INFO ((MY_ID "vendor %s, product %s\n",
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261 | usb_knowndevs[i].vendorname, usb_knowndevs[i].productname));
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262 | }
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263 | }
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264 |
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265 | if(alt && (st = usb->set_alt_interface(dev, intf)) != B_OK) {
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266 | DPRINTF_ERR ((MY_ID "set_alt_interface() failed %d\n", (int)st));
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267 | return B_ERROR;
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268 | }
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269 |
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270 | /* configuration */
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271 | if ((st = usb->set_configuration (dev, conf)) != B_OK) {
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272 | DPRINTF_ERR ((MY_ID "set_configuration() failed %d\n", (int)st));
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273 | return B_ERROR;
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274 | }
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275 |
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276 | if ((my_dev = create_device (dev, intf, ifno)) == NULL) {
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277 | return B_ERROR;
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278 | }
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279 |
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280 | DPRINTF_INFO ((MY_ID "my_dev = %p interface endpoint = %p\n",
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281 | my_dev, &intf->endpoint [0]));
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282 | st = usb->queue_request(dev,
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283 | USB_REQTYPE_ENDPOINT_OUT | USB_REQTYPE_STANDARD,
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284 | USB_REQUEST_CLEAR_FEATURE,
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285 | USB_FEATURE_ENDPOINT_HALT, 1, my_dev->total_report_size,
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286 | my_dev->buffer, my_dev->total_report_size, midi_usb_callback, my_dev);
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287 | if (st != B_OK) {
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288 | DPRINTF_ERR ((MY_ID "queue_request() error %d\n", (int)st));
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289 | return B_ERROR;
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290 | }
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291 |
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292 | my_dev->timestamp = system_time ();
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293 |
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294 | DPRINTF_INFO ((MY_ID "queueing bulk xfer ep 0\n"));
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295 | /* issue bulk transfer */
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296 | my_dev->ept = &intf->endpoint [0]; /* interrupt IN */
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297 | /* DPRINTF_INFO ((MY_ID "my_dev = %p endpoint = %p interface endpoint = %p\n",*/
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298 | /* my_dev, my_dev->ept, &intf->endpoint [0]));*/
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299 | st = usb->queue_bulk (my_dev->ept->handle, my_dev->buffer,
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300 | my_dev->total_report_size, midi_usb_callback, my_dev);
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301 | if (st != B_OK) {
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302 | DPRINTF_ERR ((MY_ID "queue_bulk() error %d\n", (int)st));
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303 | return B_ERROR;
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304 | }
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305 |
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306 | /* create a port */
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307 | add_device_info (my_dev);
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308 |
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309 | *cookie = my_dev;
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310 | DPRINTF_INFO ((MY_ID "added %s\n", my_dev->name));
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311 |
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312 | return B_OK;
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313 | }
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314 |
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315 | static status_t
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316 | usb_midi_removed (void *cookie)
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317 | {
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318 | my_device_info *my_dev = cookie;
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319 |
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320 | assert (cookie != NULL);
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321 |
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322 | DPRINTF_INFO ((MY_ID "device_removed(%s)\n", my_dev->name));
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323 | usb->cancel_queued_transfers (my_dev->ept->handle);
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324 | remove_device_info (my_dev);
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325 | if (my_dev->open == 0) {
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326 | remove_device (my_dev);
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327 | } else {
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328 | DPRINTF_INFO ((MY_ID "%s still open\n", my_dev->name));
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329 | my_dev->active = false;
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330 | }
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331 | return B_OK;
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332 | }
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333 |
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334 | static usb_notify_hooks my_notify_hooks =
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335 | {
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336 | usb_midi_added, usb_midi_removed
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337 | };
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338 |
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339 | #define SUPPORTED_DEVICES 1
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340 | usb_support_descriptor my_supported_devices [SUPPORTED_DEVICES] =
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341 | {
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342 | { USB_AUDIO_DEVICE_CLASS, USB_AUDIO_INTERFACE_MIDISTREAMING_SUBCLASS, 0, 0, 0 },
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343 | };
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344 |
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345 |
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346 | /* ----------
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347 | usb_midi_open - handle open() calls
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348 | ----- */
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349 |
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350 | static status_t
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351 | usb_midi_open(const char *name, uint32 flags,
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352 | driver_cookie **out_cookie)
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353 | {
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354 | driver_cookie *cookie;
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355 | my_device_info *my_dev;
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356 |
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357 | assert (name != NULL);
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358 | assert (out_cookie != NULL);
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359 | DPRINTF_INFO ((MY_ID "open(%s)\n", name));
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360 |
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361 | if ((my_dev = search_device_info (name)) == NULL)
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362 | return B_ENTRY_NOT_FOUND;
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363 | if ((cookie = malloc (sizeof (driver_cookie))) == NULL)
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364 | return B_NO_MEMORY;
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365 |
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366 | acquire_sem (my_dev->sem_lock);
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367 | cookie->my_dev = my_dev;
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368 | cookie->next = my_dev->open_fds;
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369 | my_dev->open_fds = cookie;
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370 | my_dev->open++;
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371 | release_sem (my_dev->sem_lock);
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372 |
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373 | *out_cookie = cookie;
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374 | DPRINTF_INFO ((MY_ID "device %s open (%d)\n", name, my_dev->open));
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375 | return B_OK;
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376 | }
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377 |
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378 |
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379 | /* ----------
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380 | usb_midi_read - handle read() calls
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381 | ----- */
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382 |
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383 | static status_t
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384 | usb_midi_read(driver_cookie *cookie, off_t position,
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385 | void *buf, size_t *num_bytes)
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386 | {
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387 | status_t err = B_ERROR;
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388 | my_device_info *my_dev;
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389 |
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390 | assert (cookie != NULL);
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391 | my_dev = cookie->my_dev;
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392 | assert (my_dev != NULL);
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393 |
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394 | if (!my_dev->active)
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395 | return B_ERROR; /* already unplugged */
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396 |
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397 | err = acquire_sem_etc(my_dev->sem_cb, 1, B_CAN_INTERRUPT, 0LL);
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398 | if (err != B_OK)
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399 | return err;
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400 | acquire_sem (my_dev->sem_lock);
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401 | ring_buffer_user_read(my_dev->rbuf, buf, 1);
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402 | release_sem (my_dev->sem_lock);
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403 | *num_bytes = 1;
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404 | return err;
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405 | }
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406 |
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407 |
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408 | /* ----------
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409 | usb_midi_write - handle write() calls
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410 | ----- */
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411 |
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412 | static status_t
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413 | usb_midi_write(driver_cookie *cookie, off_t position,
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414 | const void *buf, size_t *num_bytes)
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415 | {
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416 | return B_ERROR;
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417 | }
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418 |
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419 | /* ----------
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420 | usb_midi_control - handle ioctl calls
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421 | ----- */
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422 |
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423 | static status_t
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424 | usb_midi_control(void * cookie, uint32 iop,
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425 | void * data, size_t len)
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426 | {
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427 | return B_ERROR;
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428 | }
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429 |
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430 | /* ----------
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431 | usb_midi_close - handle close() calls
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432 | ----- */
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433 |
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434 | static status_t
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435 | usb_midi_close(driver_cookie *cookie)
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436 | {
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437 | my_device_info *my_dev;
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438 |
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439 | assert (cookie != NULL && cookie->my_dev != NULL);
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440 | my_dev = cookie->my_dev;
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441 | DPRINTF_INFO ((MY_ID "close(%s)\n", my_dev->name));
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442 |
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443 | /* detach the cookie from list */
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444 |
|
---|
445 | acquire_sem (my_dev->sem_lock);
|
---|
446 | if (my_dev->open_fds == cookie)
|
---|
447 | my_dev->open_fds = cookie->next;
|
---|
448 | else {
|
---|
449 | driver_cookie *p;
|
---|
450 | for (p = my_dev->open_fds; p != NULL; p = p->next) {
|
---|
451 | if (p->next == cookie) {
|
---|
452 | p->next = cookie->next;
|
---|
453 | break;
|
---|
454 | }
|
---|
455 | }
|
---|
456 | }
|
---|
457 | --my_dev->open;
|
---|
458 | release_sem (my_dev->sem_lock);
|
---|
459 |
|
---|
460 | return B_OK;
|
---|
461 | }
|
---|
462 |
|
---|
463 |
|
---|
464 | /* -----
|
---|
465 | usb_midi_free - called after the last device is closed, and after
|
---|
466 | all i/o is complete.
|
---|
467 | ----- */
|
---|
468 | static status_t
|
---|
469 | usb_midi_free(driver_cookie *cookie)
|
---|
470 | {
|
---|
471 | my_device_info *my_dev;
|
---|
472 |
|
---|
473 | assert (cookie != NULL && cookie->my_dev != NULL);
|
---|
474 | my_dev = cookie->my_dev;
|
---|
475 | DPRINTF_INFO ((MY_ID "free(%s)\n", my_dev->name));
|
---|
476 |
|
---|
477 | free (cookie);
|
---|
478 | if (my_dev->open > 0)
|
---|
479 | DPRINTF_INFO ((MY_ID "%d opens left\n", my_dev->open));
|
---|
480 | else if (!my_dev->active) {
|
---|
481 | DPRINTF_INFO ((MY_ID "removed %s\n", my_dev->name));
|
---|
482 | remove_device (my_dev);
|
---|
483 | }
|
---|
484 |
|
---|
485 | return B_OK;
|
---|
486 | }
|
---|
487 |
|
---|
488 |
|
---|
489 | /* -----
|
---|
490 | function pointers for the device hooks entry points
|
---|
491 | ----- */
|
---|
492 |
|
---|
493 | static device_hooks usb_midi_hooks = {
|
---|
494 | (device_open_hook) usb_midi_open,
|
---|
495 | (device_close_hook) usb_midi_close,
|
---|
496 | (device_free_hook) usb_midi_free,
|
---|
497 | (device_control_hook) usb_midi_control,
|
---|
498 | (device_read_hook) usb_midi_read,
|
---|
499 | (device_write_hook) usb_midi_write,
|
---|
500 | NULL, NULL, NULL, NULL
|
---|
501 | };
|
---|
502 |
|
---|
503 |
|
---|
504 | /* ----------
|
---|
505 | init_hardware - called once the first time the driver is loaded
|
---|
506 | ----- */
|
---|
507 | _EXPORT status_t
|
---|
508 | init_hardware (void)
|
---|
509 | {
|
---|
510 | DPRINTF_INFO ((MY_ID "init_hardware() " __DATE__ " " __TIME__ "\n"));
|
---|
511 | return B_OK;
|
---|
512 | }
|
---|
513 |
|
---|
514 | /* ----------
|
---|
515 | init_driver - optional function - called every time the driver
|
---|
516 | is loaded.
|
---|
517 | ----- */
|
---|
518 | _EXPORT status_t
|
---|
519 | init_driver (void)
|
---|
520 | {
|
---|
521 |
|
---|
522 | DPRINTF_INFO ((MY_ID "init_driver() " __DATE__ " " __TIME__ "\n"));
|
---|
523 |
|
---|
524 | if (get_module (B_USB_MODULE_NAME, (module_info **) &usb) != B_OK)
|
---|
525 | return B_ERROR;
|
---|
526 |
|
---|
527 | if ((my_device_list_lock = create_sem (1, "dev_list_lock")) < 0) {
|
---|
528 | put_module (B_USB_MODULE_NAME);
|
---|
529 | return my_device_list_lock; /* error code */
|
---|
530 | }
|
---|
531 |
|
---|
532 | usb->register_driver (usb_midi_driver_name, my_supported_devices,
|
---|
533 | SUPPORTED_DEVICES, NULL);
|
---|
534 | usb->install_notify (usb_midi_driver_name, &my_notify_hooks);
|
---|
535 | DPRINTF_INFO ((MY_ID "init_driver() OK\n"));
|
---|
536 |
|
---|
537 | return B_OK;
|
---|
538 | }
|
---|
539 |
|
---|
540 |
|
---|
541 | /* ----------
|
---|
542 | uninit_driver - optional function - called every time the driver
|
---|
543 | is unloaded
|
---|
544 | ----- */
|
---|
545 | _EXPORT void
|
---|
546 | uninit_driver (void)
|
---|
547 | {
|
---|
548 | DPRINTF_INFO ((MY_ID "uninit_driver()\n"));
|
---|
549 | usb->uninstall_notify (usb_midi_driver_name);
|
---|
550 |
|
---|
551 | delete_sem(my_device_list_lock);
|
---|
552 | put_module(B_USB_MODULE_NAME);
|
---|
553 | free_device_names();
|
---|
554 | }
|
---|
555 |
|
---|
556 | /*
|
---|
557 | publish_devices
|
---|
558 | device names are generated dynamically
|
---|
559 | */
|
---|
560 |
|
---|
561 | _EXPORT const char **
|
---|
562 | publish_devices (void)
|
---|
563 | {
|
---|
564 | DPRINTF_INFO ((MY_ID "publish_devices()\n"));
|
---|
565 |
|
---|
566 | if (my_device_list_changed) {
|
---|
567 | free_device_names ();
|
---|
568 | alloc_device_names ();
|
---|
569 | if (my_device_names != NULL)
|
---|
570 | rebuild_device_names ();
|
---|
571 | my_device_list_changed = false;
|
---|
572 | }
|
---|
573 | assert (my_device_names != NULL);
|
---|
574 | return (const char **) my_device_names;
|
---|
575 | }
|
---|
576 |
|
---|
577 | /* ----------
|
---|
578 | find_device - return ptr to device hooks structure for a
|
---|
579 | given device name
|
---|
580 | ----- */
|
---|
581 |
|
---|
582 | _EXPORT device_hooks *
|
---|
583 | find_device(const char *name)
|
---|
584 | {
|
---|
585 | assert (name != NULL);
|
---|
586 | DPRINTF_INFO ((MY_ID "find_device(%s)\n", name));
|
---|
587 | if (search_device_info(name) == NULL)
|
---|
588 | return NULL;
|
---|
589 | return &usb_midi_hooks;
|
---|
590 | }
|
---|
591 |
|
---|