| libusb.3 (1829d5da5355930d5cfa8ec8add8ff47dc0bebab) | libusb.3 (dc8f21bc49c13bae38994679d0388170b28be719) |
|---|---|
| 1.\" 2.\" Copyright (c) 2008 Hans Petter Selasky 3.\" 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 12 unchanged lines hidden (view full) --- 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" | 1.\" 2.\" Copyright (c) 2008 Hans Petter Selasky 3.\" 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 12 unchanged lines hidden (view full) --- 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" |
| 29.Dd Feb 14, 2009 | 29.Dd April 5, 2009 |
| 30.Dt LIBUSB 3 31.Os 32.Sh NAME 33.Nm libusb 34. 35.Nd "USB access library" 36. 37. 38.Sh LIBRARY 39. 40. 41USB access library (libusb -lusb) 42. 43. 44. 45.Sh SYNOPSIS | 30.Dt LIBUSB 3 31.Os 32.Sh NAME 33.Nm libusb 34. 35.Nd "USB access library" 36. 37. 38.Sh LIBRARY 39. 40. 41USB access library (libusb -lusb) 42. 43. 44. 45.Sh SYNOPSIS |
| 46. 47. | |
| 48.In libusb20.h | 46.In libusb20.h |
| 47.Ft int 48.Fn libusb20_tr_close "struct libusb20_transfer *xfer" 49.Ft int 50.Fn libusb20_tr_open "struct libusb20_transfer *xfer" "uint32_t max_buf_size" "uint32_t max_frame_count" "uint8_t ep_no" 51.Ft struct libusb20_transfer* 52.Fn libusb20_tr_get_pointer "struct libusb20_device *pdev" "uint16_t tr_index" 53.Ft uint16_t 54.Fn libusb20_tr_get_time_complete "struct libusb20_transfer *xfer" 55.Ft uint32_t 56.Fn libusb20_tr_get_actual_frames "struct libusb20_transfer *xfer" 57.Ft uint32_t 58.Fn libusb20_tr_get_actual_length "struct libusb20_transfer *xfer" 59.Ft uint32_t 60.Fn libusb20_tr_get_max_frames "struct libusb20_transfer *xfer" 61.Ft uint32_t 62.Fn libusb20_tr_get_max_packet_length "struct libusb20_transfer *xfer" 63.Ft uint32_t 64.Fn libusb20_tr_get_max_total_length "struct libusb20_transfer *xfer" 65.Ft uint8_t 66.Fn libusb20_tr_get_status "struct libusb20_transfer *xfer" 67.Ft uint8_t 68.Fn libusb20_tr_pending "struct libusb20_transfer *xfer" 69.Ft void 70.Fn libusb20_tr_callback_wrapper "struct libusb20_transfer *xfer" 71.Ft void 72.Fn libusb20_tr_clear_stall_sync "struct libusb20_transfer *xfer" 73.Ft void 74.Fn libusb20_tr_drain "struct libusb20_transfer *xfer" 75.Ft void 76.Fn libusb20_tr_set_buffer "struct libusb20_transfer *xfer" "void *buffer" "uint16_t fr_index" 77.Ft void 78.Fn libusb20_tr_set_callback "struct libusb20_transfer *xfer" "libusb20_tr_callback_t *cb" 79.Ft void 80.Fn libusb20_tr_set_flags "struct libusb20_transfer *xfer" "uint8_t flags" 81.Ft void 82.Fn libusb20_tr_set_length "struct libusb20_transfer *xfer" "uint32_t length" "uint16_t fr_index" 83.Ft void 84.Fn libusb20_tr_set_priv_sc0 "struct libusb20_transfer *xfer" "void *sc0" 85.Ft void 86.Fn libusb20_tr_set_priv_sc1 "struct libusb20_transfer *xfer" "void *sc1" 87.Ft void 88.Fn libusb20_tr_set_timeout "struct libusb20_transfer *xfer" "uint32_t timeout" 89.Ft void 90.Fn libusb20_tr_set_total_frames "struct libusb20_transfer *xfer" "uint32_t nframes" 91.Ft void 92.Fn libusb20_tr_setup_bulk "struct libusb20_transfer *xfer" "void *pbuf" "uint32_t length" "uint32_t timeout" 93.Ft void 94.Fn libusb20_tr_setup_control "struct libusb20_transfer *xfer" "void *psetup" "void *pbuf" "uint32_t timeout" 95.Ft void 96.Fn libusb20_tr_setup_intr "struct libusb20_transfer *xfer" "void *pbuf" "uint32_t length" "uint32_t timeout" 97.Ft void 98.Fn libusb20_tr_setup_isoc "struct libusb20_transfer *xfer" "void *pbuf" "uint32_t length" "uint61_t fr_index" 99.Ft void 100.Fn libusb20_tr_start "struct libusb20_transfer *xfer" 101.Ft void 102.Fn libusb20_tr_stop "struct libusb20_transfer *xfer" 103.Ft void 104.Fn libusb20_tr_submit "struct libusb20_transfer *xfer" 105.Ft void * 106.Fn libusb20_tr_get_priv_sc0 "struct libusb20_transfer *xfer" 107.Ft void * 108.Fn libusb20_tr_get_priv_sc1 "struct libusb20_transfer *xfer" 109.Ft const char * 110.Fn libusb20_dev_get_backend_name "struct libusb20_device *" 111.Ft int 112.Fn libusb20_dev_get_info "struct libusb20_device *pdev" "struct usb2_device_info *pinfo" 113.Ft int 114.Fn libusb20_dev_get_iface_desc "struct libusb20_device *pdev" "uint8_t iface_index" "char *buf" "uint8_t len" 115.Ft const char * 116.Fn libusb20_dev_get_desc "struct libusb20_device *pdev" 117.Ft int 118.Fn libusb20_dev_claim_interface "struct libusb20_device *pdev" "uint8_t iface_index" 119.Ft int 120.Fn libusb20_dev_close "struct libusb20_device *pdev" 121.Ft int 122.Fn libusb20_dev_detach_kernel_driver "struct libusb20_device *pdev" "uint8_t iface_index" 123.Ft int 124.Fn libusb20_dev_set_config_index "struct libusb20_device *pdev" "uint8_t configIndex" 125.Ft int 126.Fn libusb20_dev_get_debug "struct libusb20_device *pdev" 127.Ft int 128.Fn libusb20_dev_get_fd "struct libusb20_device *pdev" 129.Ft int 130.Fn libusb20_dev_kernel_driver_active "struct libusb20_device *pdev" "uint8_t iface_index" 131.Ft int 132.Fn libusb20_dev_open "struct libusb20_device *pdev" "uint16_t transfer_max" 133.Ft int 134.Fn libusb20_dev_process "struct libusb20_device *pdev" 135.Ft int 136.Fn libusb20_dev_release_interface "struct libusb20_device *pdev" "uint8_t iface_index" 137.Ft int 138.Fn libusb20_dev_request_sync "struct libusb20_device *pdev" "struct LIBUSB20_CONTROL_SETUP_DECODED *setup" "void *data" "uint16_t *pactlen" "uint32_t timeout" "uint8_t flags" 139.Ft int 140.Fn libusb20_dev_req_string_sync "struct libusb20_device *pdev" "uint8_t index" "uint16_t langid" "void *ptr" "uint16_t len" 141.Ft int 142.Fn libusb20_dev_req_string_simple_sync "struct libusb20_device *pdev" "uint8_t index" "void *ptr" "uint16_t len" 143.Ft int 144.Fn libusb20_dev_reset "struct libusb20_device *pdev" 145.Ft int 146.Fn libusb20_dev_set_power_mode "struct libusb20_device *pdev" "uint8_t power_mode" 147.Ft uint8_t 148.Fn libusb20_dev_get_power_mode "struct libusb20_device *pdev" 149.Ft int 150.Fn libusb20_dev_set_alt_index "struct libusb20_device *pdev" "uint8_t iface_index" "uint8_t alt_index" 151.Ft int 152.Fn libusb20_dev_get_device_desc "struct libusb20_device *pdev" "uint8_t iface_indexr", "char *buf" "uint8_t len" 153.Ft struct libusb20_config * 154.Fn libusb20_dev_alloc_config "struct libusb20_device *pdev" "uint8_t config_index" 155.Ft struct libusb20_device * 156.Fn libusb20_dev_alloc "void" 157.Ft uint8_t 158.Fn libusb20_dev_get_address "struct libusb20_device *pdev" 159.Ft uint8_t 160.Fn libusb20_dev_get_bus_number "struct libusb20_device *pdev" 161.Ft uint8_t 162.Fn libusb20_dev_get_mode "struct libusb20_device *pdev" 163.Ft uint8_t 164.Fn libusb20_dev_get_speed "struct libusb20_device *pdev" 165.Ft uint8_t 166.Fn libusb20_dev_get_config_index "struct libusb20_device *pdev" 167.Ft void 168.Fn libusb20_dev_free "struct libusb20_device *pdev" 169.Ft void 170.Fn libusb20_dev_set_debug "struct libusb20_device *pdev" "int debug" 171.Ft void 172.Fn libusb20_dev_wait_process "struct libusb20_device *pdev" "int timeout" 173.Ft int 174.Fn libusb20_be_get_template "struct libusb20_backend *pbe" "int *ptemp" 175.Ft int 176.Fn libusb20_be_set_template "struct libusb20_backend *pbe" "int temp" 177.Ft int 178.Fn libusb20_be_get_dev_quirk "struct libusb20_backend *pber", "uint16_t index" "struct libusb20_quirk *pq" 179.Ft int 180.Fn libusb20_be_get_quirk_name "struct libusb20_backend *pbe" "uint16_t index" "struct libusb20_quirk *pq" 181.Ft int 182.Fn libusb20_be_add_dev_quirk "struct libusb20_backend *pbe" "struct libusb20_quirk *pq" 183.Ft int 184.Fn libusb20_be_remove_dev_quirk "struct libusb20_backend *pbe" "struct libusb20_quirk *pq" 185.Ft struct libusb20_backend * 186.Fn libusb20_be_alloc_linux "void" 187.Ft struct libusb20_device * 188.Fn libusb20_be_device_foreach "struct libusb20_backend *pbe" "struct libusb20_device *pdev" 189.Ft void 190.Fn libusb20_be_dequeue_device "struct libusb20_backend *pbe" "struct libusb20_device *pdev" 191.Ft void 192.Fn libusb20_be_enqueue_device "struct libusb20_backend *pbe" "struct libusb20_device *pdev" 193.Ft void 194.Fn libusb20_be_free "struct libusb20_backend *pbe" 195.Ft uint8_t 196.Fn libusb20_me_get_1 "const struct libusb20_me_struct *me" "uint16_t off" 197.Ft uint16_t 198.Fn libusb20_me_get_2 "const struct libusb20_me_struct *me" "uint16_t off" 199.Ft uint16_t 200.Fn libusb20_me_encode "void *pdata" "uint16_t len" "const void *pdecoded" 201.Ft uint16_t 202.Fn libusb20_me_decode "const void *pdata" "uint16_t len" "void *pdecoded" 203.Ft "const uint8_t *" 204.Fn libusb20_desc_foreach "const struct libusb20_me_struct *me" "const uint8_t *pdesc" |
|
| 49. 50. 51.Sh DESCRIPTION 52. 53The 54.Nm 55library implements functions to be able to easily access and control 56USB through the USB file system interface. 57. 58. 59.Sh USB TRANSFER OPERATIONS 60. 61.Pp 62. | 205. 206. 207.Sh DESCRIPTION 208. 209The 210.Nm 211library implements functions to be able to easily access and control 212USB through the USB file system interface. 213. 214. 215.Sh USB TRANSFER OPERATIONS 216. 217.Pp 218. |
| 63.Fn libusb20_tr_close pxfer 64This function will release all kernel resources associated with an USB 65.Fa pxfer . | 219.Fn libusb20_tr_close 220will release all kernel resources associated with an USB 221.Fa xfer . |
| 66. 67This function returns zero upon success. 68. 69Non-zero return values indicate a LIBUSB20_ERROR value. 70. 71.Pp 72. | 222. 223This function returns zero upon success. 224. 225Non-zero return values indicate a LIBUSB20_ERROR value. 226. 227.Pp 228. |
| 73.Fn libusb20_tr_open pxfer max_buf_size max_frame_count ep_no 74This function will allocate kernel resources like | 229.Fn libusb20_tr_open 230will allocate kernel resources like |
| 75.Fa max_buf_size 76and 77.Fa max_frame_count 78associated with an USB 79.Fa pxfer 80and bind the transfer to the specified 81.Fa ep_no . 82. 83This function returns zero upon success. 84. 85Non-zero return values indicate a LIBUSB20_ERROR value. 86. 87.Pp 88. | 231.Fa max_buf_size 232and 233.Fa max_frame_count 234associated with an USB 235.Fa pxfer 236and bind the transfer to the specified 237.Fa ep_no . 238. 239This function returns zero upon success. 240. 241Non-zero return values indicate a LIBUSB20_ERROR value. 242. 243.Pp 244. |
| 89.Fn libusb20_tr_get_pointer pdev tr_index 90This function will return a pointer to the allocated USB transfer according to the | 245.Fn libusb20_tr_get_pointer 246will return a pointer to the allocated USB transfer according to the |
| 91.Fa pdev 92and 93.Fa tr_index 94arguments. 95. 96This function returns NULL in case of failure. 97. 98.Pp 99. | 247.Fa pdev 248and 249.Fa tr_index 250arguments. 251. 252This function returns NULL in case of failure. 253. 254.Pp 255. |
| 100.Fn libusb20_tr_get_time_complete pxfer 101This function will return the completion time of an USB transfer in | 256.Fn libusb20_tr_get_time_complete 257will return the completion time of an USB transfer in |
| 102millisecond units. This function is most useful for isochronous USB 103transfers when doing echo cancelling. 104. 105.Pp 106. | 258millisecond units. This function is most useful for isochronous USB 259transfers when doing echo cancelling. 260. 261.Pp 262. |
| 107.Fn libusb20_tr_get_actual_frames pxfer 108This function will return the actual number of USB frames after an USB | 263.Fn libusb20_tr_get_actual_frames 264will return the actual number of USB frames after an USB |
| 109transfer completed. A value of zero means that no data was transferred. 110. 111.Pp 112. | 265transfer completed. A value of zero means that no data was transferred. 266. 267.Pp 268. |
| 113.Fn libusb20_tr_get_actual_length pxfer 114This function will return the sum of the actual length for all | 269.Fn libusb20_tr_get_actual_length 270will return the sum of the actual length for all |
| 115transferred USB frames for the given USB transfer. 116. 117.Pp 118. | 271transferred USB frames for the given USB transfer. 272. 273.Pp 274. |
| 119.Fn libusb20_tr_get_max_frames pxfer 120This function will return the maximum number of USB frames that were | 275.Fn libusb20_tr_get_max_frames 276will return the maximum number of USB frames that were |
| 121allocated when an USB transfer was setup for the given USB transfer. 122. 123.Pp 124. | 277allocated when an USB transfer was setup for the given USB transfer. 278. 279.Pp 280. |
| 125.Fn libusb20_tr_get_max_packet_length pxfer 126This function will return the maximum packet length in bytes | 281.Fn libusb20_tr_get_max_packet_length 282will return the maximum packet length in bytes |
| 127associated with the given USB transfer. 128. 129The packet length can be used round up buffer sizes so that short USB 130packets are avoided for proxy buffers. 131. 132. 133.Pp 134. | 283associated with the given USB transfer. 284. 285The packet length can be used round up buffer sizes so that short USB 286packets are avoided for proxy buffers. 287. 288. 289.Pp 290. |
| 135.Fn libusb20_tr_get_max_total_length pxfer 136This function will return the maximum value for the length sum of all | 291.Fn libusb20_tr_get_max_total_length 292function will return the maximum value for the length sum of all |
| 137USB frames associated with an USB transfer. 138. 139.Pp 140. | 293USB frames associated with an USB transfer. 294. 295.Pp 296. |
| 141.Fn libusb20_tr_get_status pxfer 142This function will return the status of an USB transfer. | 297.Fn libusb20_tr_get_status 298will return the status of an USB transfer. |
| 143. 144Status values are defined by a set of LIBUSB20_TRANSFER_XXX enums. 145. 146.Pp 147. | 299. 300Status values are defined by a set of LIBUSB20_TRANSFER_XXX enums. 301. 302.Pp 303. |
| 148.Fn libusb20_tr_pending pxfer 149This function will return non-zero if the given USB transfer is | 304.Fn libusb20_tr_pending 305will return non-zero if the given USB transfer is |
| 150pending for completion. 151. 152Else this function returns zero. 153. 154.Pp 155. | 306pending for completion. 307. 308Else this function returns zero. 309. 310.Pp 311. |
| 156.Fn libusb20_tr_callback_wrapper pxfer | 312.Fn libusb20_tr_callback_wrapper |
| 157This is an internal function used to wrap asynchronous USB callbacks. 158. 159.Pp 160. | 313This is an internal function used to wrap asynchronous USB callbacks. 314. 315.Pp 316. |
| 161.Fn libusb20_tr_clear_stall_sync pxfer | 317.Fn libusb20_tr_clear_stall_sync |
| 162This is an internal function used to synchronously clear the stall on 163the given USB transfer. 164. 165Please see the USB specification for more information on stall 166clearing. 167. 168If the given USB transfer is pending when this function is called, the 169USB transfer will complete with an error after that this function has 170been called. 171. 172.Pp 173. | 318This is an internal function used to synchronously clear the stall on 319the given USB transfer. 320. 321Please see the USB specification for more information on stall 322clearing. 323. 324If the given USB transfer is pending when this function is called, the 325USB transfer will complete with an error after that this function has 326been called. 327. 328.Pp 329. |
| 174.Fn libusb20_tr_drain pxfer 175This function will stop the given USB transfer and will not return | 330.Fn libusb20_tr_drain 331will stop the given USB transfer and will not return |
| 176until the USB transfer has been stopped in hardware. 177. 178.Pp 179. | 332until the USB transfer has been stopped in hardware. 333. 334.Pp 335. |
| 180.Fn libusb20_tr_set_buffer pxfer pbuf fr_index 181This function is used to set the | 336.Fn libusb20_tr_set_buffer 337is used to set the |
| 182.Fa buffer 183pointer for the given USB transfer and 184.Fa fr_index . 185. 186Typically the frame index is zero. 187. 188. 189.Pp 190. | 338.Fa buffer 339pointer for the given USB transfer and 340.Fa fr_index . 341. 342Typically the frame index is zero. 343. 344. 345.Pp 346. |
| 191.Fn libusb20_tr_set_callback pxfer pcallback 192This function is used to set the USB callback for asynchronous USB | 347.Fn libusb20_tr_set_callback 348is used to set the USB callback for asynchronous USB |
| 193transfers. 194. 195The callback type is defined by libusb20_tr_callback_t. 196. 197.Pp 198. | 349transfers. 350. 351The callback type is defined by libusb20_tr_callback_t. 352. 353.Pp 354. |
| 199.Fn libusb20_tr_set_flags pxfer flags 200This function is used to set various USB flags for the given USB transfer. | 355.Fn libusb20_tr_set_flags 356is used to set various USB flags for the given USB transfer. |
| 201.Bl -tag 202.It LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK 203Report a short frame as error. 204.It LIBUSB20_TRANSFER_MULTI_SHORT_NOT_OK 205Multiple short frames are not allowed. 206.It LIBUSB20_TRANSFER_FORCE_SHORT 207All transmitted frames are short terminated. 208.It LIBUSB20_TRANSFER_DO_CLEAR_STALL 209Will do a clear-stall before starting the transfer. 210.El 211. 212.Pp 213. | 357.Bl -tag 358.It LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK 359Report a short frame as error. 360.It LIBUSB20_TRANSFER_MULTI_SHORT_NOT_OK 361Multiple short frames are not allowed. 362.It LIBUSB20_TRANSFER_FORCE_SHORT 363All transmitted frames are short terminated. 364.It LIBUSB20_TRANSFER_DO_CLEAR_STALL 365Will do a clear-stall before starting the transfer. 366.El 367. 368.Pp 369. |
| 214.Fn libusb20_tr_set_length pxfer length fr_index 215This function sets the length of a given USB transfer and frame index. | 370.Fn libusb20_tr_set_length 371sets the length of a given USB transfer and frame index. |
| 216. 217.Pp 218. | 372. 373.Pp 374. |
| 219.Fn libusb20_tr_set_priv_sc0 pxfer psc0 220This function sets private driver pointer number zero. | 375.Fn libusb20_tr_set_priv_sc0 376sets private driver pointer number zero. |
| 221. 222.Pp 223. | 377. 378.Pp 379. |
| 224.Fn libusb20_tr_set_priv_sc1 pxfer psc1 225This function sets private driver pointer number one. | 380.Fn libusb20_tr_set_priv_sc1 381sets private driver pointer number one. |
| 226. 227.Pp 228. | 382. 383.Pp 384. |
| 229.Fn libusb20_tr_set_timeout pxfer timeout 230This function sets the timeout for the given USB transfer. | 385.Fn libusb20_tr_set_timeout 386sets the timeout for the given USB transfer. |
| 231. 232A timeout value of zero means no timeout. 233. 234The timeout is given in milliseconds. 235. 236.Pp 237. | 387. 388A timeout value of zero means no timeout. 389. 390The timeout is given in milliseconds. 391. 392.Pp 393. |
| 238.Fn libusb20_tr_set_total_frames pxfer nframes 239This function sets the total number of frames that should be executed when the USB transfer is submitted. | 394.Fn libusb20_tr_set_total_frames 395sets the total number of frames that should be executed when the USB transfer is submitted. |
| 240. 241The total number of USB frames must be less than the maximum number of USB frames associated with the given USB transfer. 242. 243.Pp 244. | 396. 397The total number of USB frames must be less than the maximum number of USB frames associated with the given USB transfer. 398. 399.Pp 400. |
| 245.Fn libusb20_tr_setup_bulk pxfer pbuf length timeout 246This function is a helper function for setting up a single frame USB BULK transfer. | 401.Fn libusb20_tr_setup_bulk 402is a helper function for setting up a single frame USB BULK transfer. |
| 247. 248.Pp 249. | 403. 404.Pp 405. |
| 250.Fn libusb20_tr_setup_control pxfer psetup pbuf timeout 251This function is a helper function for setting up a single or dual | 406.Fn libusb20_tr_setup_control 407is a helper function for setting up a single or dual |
| 252frame USB CONTROL transfer depending on the control transfer length. 253. 254.Pp 255. | 408frame USB CONTROL transfer depending on the control transfer length. 409. 410.Pp 411. |
| 256.Fn libusb20_tr_setup_intr pxfer pbuf length timeout 257This function is a helper function for setting up a single frame USB INTERRUPT transfer. | 412.Fn libusb20_tr_setup_intr 413is a helper function for setting up a single frame USB INTERRUPT transfer. |
| 258. 259.Pp 260. | 414. 415.Pp 416. |
| 261.Fn libusb20_tr_setup_isoc pxfer pbuf length fr_index 262This function is a helper function for setting up a multi frame USB ISOCHRONOUS transfer. | 417.Fn libusb20_tr_setup_isoc 418is a helper function for setting up a multi frame USB ISOCHRONOUS transfer. |
| 263. 264.Pp 265. | 419. 420.Pp 421. |
| 266.Fn libusb20_tr_start pxfer 267This function will get the USB transfer started, if not already | 422.Fn libusb20_tr_start 423will get the USB transfer started, if not already |
| 268started. 269. 270This function will not get the transfer queued in hardware. 271. 272This function is non-blocking. 273. 274.Pp 275. | 424started. 425. 426This function will not get the transfer queued in hardware. 427. 428This function is non-blocking. 429. 430.Pp 431. |
| 276.Fn libusb20_tr_stop pxfer 277This function will get the USB transfer stopped, if not already stopped. | 432.Fn libusb20_tr_stop 433will get the USB transfer stopped, if not already stopped. |
| 278. 279This function is non-blocking, which means that the actual stop can 280happen after the return of this function. 281. 282.Pp 283. | 434. 435This function is non-blocking, which means that the actual stop can 436happen after the return of this function. 437. 438.Pp 439. |
| 284.Fn libusb20_tr_submit pxfer 285This function will get the USB transfer queued in hardware. | 440.Fn libusb20_tr_submit 441will get the USB transfer queued in hardware. |
| 286. 287. 288.Pp 289. | 442. 443. 444.Pp 445. |
| 290.Fn libusb20_tr_get_priv_sc0 pxfer 291This function returns private driver pointer number zero associated | 446.Fn libusb20_tr_get_priv_sc0 447returns private driver pointer number zero associated |
| 292with an USB transfer. 293. 294. 295.Pp 296. | 448with an USB transfer. 449. 450. 451.Pp 452. |
| 297.Fn libusb20_tr_get_priv_sc1 pxfer 298This function returns private driver pointer number one associated | 453.Fn libusb20_tr_get_priv_sc1 454returns private driver pointer number one associated |
| 299with an USB transfer. 300. 301. 302.Sh USB DEVICE OPERATIONS 303. 304.Pp 305. | 455with an USB transfer. 456. 457. 458.Sh USB DEVICE OPERATIONS 459. 460.Pp 461. |
| 306.Fn libusb20_dev_get_backend_name pdev 307This function returns a zero terminated string describing the backend used. | 462.Fn libusb20_dev_get_backend_name 463returns a zero terminated string describing the backend used. |
| 308. 309.Pp 310. | 464. 465.Pp 466. |
| 311.Fn libusb20_dev_get_info pdev pinfo 312This function retrives the BSD specific usb2_device_info structure into the memory location given by | 467.Fn libusb20_dev_get_info 468retrives the BSD specific usb2_device_info structure into the memory location given by |
| 313.Fa pinfo . 314The USB device given by 315.Fa pdev 316must be opened before this function will succeed. 317This function returns zero on success else a LIBUSB20_ERROR value is returned. 318. 319.Pp 320. | 469.Fa pinfo . 470The USB device given by 471.Fa pdev 472must be opened before this function will succeed. 473This function returns zero on success else a LIBUSB20_ERROR value is returned. 474. 475.Pp 476. |
| 321.Fn libusb20_dev_get_iface_desc pdev iface_index pbuf len 322This function retrieves the kernel interface description for the given USB | 477.Fn libusb20_dev_get_iface_desc 478retrieves the kernel interface description for the given USB |
| 323.Fa iface_index . 324The format of the USB interface description is: "drivername<unit>: <description>" 325The description string is always zero terminated. 326A zero length string is written in case no driver is attached to the given interface. 327The USB device given by 328.Fa pdev 329must be opened before this function will succeed. 330This function returns zero on success else a LIBUSB20_ERROR value is returned. 331. 332.Pp 333. | 479.Fa iface_index . 480The format of the USB interface description is: "drivername<unit>: <description>" 481The description string is always zero terminated. 482A zero length string is written in case no driver is attached to the given interface. 483The USB device given by 484.Fa pdev 485must be opened before this function will succeed. 486This function returns zero on success else a LIBUSB20_ERROR value is returned. 487. 488.Pp 489. |
| 334.Fn libusb20_dev_get_desc pdev 335This function returns a zero terminated string describing the given USB device. | 490.Fn libusb20_dev_get_desc 491returns a zero terminated string describing the given USB device. |
| 336The format of the string is: "drivername<unit>: <description>" 337. 338.Pp 339. | 492The format of the string is: "drivername<unit>: <description>" 493. 494.Pp 495. |
| 340.Fn libusb20_dev_claim_interface pdev iface_index | 496.Fn libusb20_dev_claim_interface |
| 341This function will try to claim the given USB interface given by 342.Fa iface_index . 343This function returns zero on success else a LIBUSB20_ERROR value is 344returned. 345. 346.Pp 347. | 497This function will try to claim the given USB interface given by 498.Fa iface_index . 499This function returns zero on success else a LIBUSB20_ERROR value is 500returned. 501. 502.Pp 503. |
| 348.Fn libusb20_dev_close pdev 349This function will close the given USB device. | 504.Fn libusb20_dev_close 505will close the given USB device. |
| 350. 351This function returns zero on success else a LIBUSB20_ERROR value is 352returned. 353. 354.Pp 355. | 506. 507This function returns zero on success else a LIBUSB20_ERROR value is 508returned. 509. 510.Pp 511. |
| 356.Fn libusb20_dev_detach_kernel_driver pdev iface_index 357This function will try to detach the kernel driver for the USB interface given by | 512.Fn libusb20_dev_detach_kernel_driver 513will try to detach the kernel driver for the USB interface given by |
| 358.Fa iface_index . 359. 360This function returns zero on success else a LIBUSB20_ERROR value is 361returned. 362. 363.Pp 364. | 514.Fa iface_index . 515. 516This function returns zero on success else a LIBUSB20_ERROR value is 517returned. 518. 519.Pp 520. |
| 365.Fn libusb20_dev_set_config_index pdev config_index 366This function will try to set the configuration index on an USB | 521.Fn libusb20_dev_set_config_index 522will try to set the configuration index on an USB |
| 367device. 368. 369The first configuration index is zero. 370. 371The un-configure index is 255. 372. 373This function returns zero on success else a LIBUSB20_ERROR value is returned. 374. 375.Pp 376. | 523device. 524. 525The first configuration index is zero. 526. 527The un-configure index is 255. 528. 529This function returns zero on success else a LIBUSB20_ERROR value is returned. 530. 531.Pp 532. |
| 377.Fn libusb20_dev_get_debug pdev 378This function returns the debug level of an USB device. | 533.Fn libusb20_dev_get_debug 534returns the debug level of an USB device. |
| 379. 380.Pp 381. | 535. 536.Pp 537. |
| 382.Fn libusb20_dev_get_fd pdev 383This function returns the file descriptor of the given USB device. | 538.Fn libusb20_dev_get_fd 539returns the file descriptor of the given USB device. |
| 384. 385A negative value is returned when no file descriptor is present. 386. 387The file descriptor can be used for polling purposes. 388. 389.Pp 390. | 540. 541A negative value is returned when no file descriptor is present. 542. 543The file descriptor can be used for polling purposes. 544. 545.Pp 546. |
| 391.Fn libusb20_dev_kernel_driver_active pdev iface_index 392This function returns a non-zero value if a kernel driver is active on | 547.Fn libusb20_dev_kernel_driver_active 548returns a non-zero value if a kernel driver is active on |
| 393the given USB interface. 394. 395Else zero is returned. 396. 397.Pp 398. | 549the given USB interface. 550. 551Else zero is returned. 552. 553.Pp 554. |
| 399.Fn libusb20_dev_open pdev transfer_max 400This function opens an USB device so that setting up USB transfers | 555.Fn libusb20_dev_open 556opens an USB device so that setting up USB transfers |
| 401becomes possible. 402. 403The number of USB transfers can be zero which means only control 404transfers are allowed. 405. 406This function returns zero on success else a LIBUSB20_ERROR value is 407returned. 408. 409A return value of LIBUSB20_ERROR_BUSY means that the device is already 410opened. 411. 412.Pp 413. | 557becomes possible. 558. 559The number of USB transfers can be zero which means only control 560transfers are allowed. 561. 562This function returns zero on success else a LIBUSB20_ERROR value is 563returned. 564. 565A return value of LIBUSB20_ERROR_BUSY means that the device is already 566opened. 567. 568.Pp 569. |
| 414.Fn libusb20_dev_process pdev 415This function is called to sync kernel USB transfers with userland USB | 570.Fn libusb20_dev_process 571is called to sync kernel USB transfers with userland USB |
| 416transfers. 417. 418This function returns zero on success else a LIBUSB20_ERROR value is 419returned typically indicating that the given USB device has been 420detached. 421. 422.Pp 423. | 572transfers. 573. 574This function returns zero on success else a LIBUSB20_ERROR value is 575returned typically indicating that the given USB device has been 576detached. 577. 578.Pp 579. |
| 424.Fn libusb20_dev_release_interface pdev iface_index 425This function will try to release a claimed USB interface for the specified USB device. | 580.Fn libusb20_dev_release_interface 581will try to release a claimed USB interface for the specified USB device. |
| 426. 427This function returns zero on success else a LIBUSB20_ERROR value is 428returned. 429. 430.Pp 431. | 582. 583This function returns zero on success else a LIBUSB20_ERROR value is 584returned. 585. 586.Pp 587. |
| 432.Fn libusb20_dev_request_sync pdev psetup pdata pactlen timeout flags 433This function will perform a synchronous control request on the given | 588.Fn libusb20_dev_request_sync 589will perform a synchronous control request on the given |
| 434USB device. 435. 436Before this call will succeed the USB device must be opened. 437. 438.Fa setup 439is a pointer to a decoded and host endian SETUP packet. 440.Fa data 441is a pointer to a data transfer buffer associated with the control transaction. This argument can be NULL. --- 5 unchanged lines hidden (view full) --- 447.Fa flags 448is used to specify transaction flags, for example LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK. 449. 450This function returns zero on success else a LIBUSB20_ERROR value is 451returned. 452. 453.Pp 454. | 590USB device. 591. 592Before this call will succeed the USB device must be opened. 593. 594.Fa setup 595is a pointer to a decoded and host endian SETUP packet. 596.Fa data 597is a pointer to a data transfer buffer associated with the control transaction. This argument can be NULL. --- 5 unchanged lines hidden (view full) --- 603.Fa flags 604is used to specify transaction flags, for example LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK. 605. 606This function returns zero on success else a LIBUSB20_ERROR value is 607returned. 608. 609.Pp 610. |
| 455.Fn libusb20_dev_req_string_sync pdev index lang_id pbuf len 456This function will synchronously request an USB string by language ID | 611.Fn libusb20_dev_req_string_sync 612will synchronously request an USB string by language ID |
| 457and string index into the given buffer limited by a maximum length. 458. 459This function returns zero on success else a LIBUSB20_ERROR value is 460returned. 461. 462.Pp 463. | 613and string index into the given buffer limited by a maximum length. 614. 615This function returns zero on success else a LIBUSB20_ERROR value is 616returned. 617. 618.Pp 619. |
| 464.Fn libusb20_dev_req_string_simple_sync pdev index pbuf len 465This function will synchronously request an USB string using the | 620.Fn libusb20_dev_req_string_simple_sync 621will synchronously request an USB string using the |
| 466default language ID and convert the string into ASCII before storing 467the string into the given buffer limited by a maximum length which 468includes the terminating zero. 469. 470This function returns zero on success else a LIBUSB20_ERROR value is 471returned. 472. 473. 474.Pp 475. | 622default language ID and convert the string into ASCII before storing 623the string into the given buffer limited by a maximum length which 624includes the terminating zero. 625. 626This function returns zero on success else a LIBUSB20_ERROR value is 627returned. 628. 629. 630.Pp 631. |
| 476.Fn libusb20_dev_reset pdev 477This function will try to BUS reset the given USB device and restore | 632.Fn libusb20_dev_reset 633will try to BUS reset the given USB device and restore |
| 478the last set USB configuration. 479. 480This function returns zero on success else a LIBUSB20_ERROR value is 481returned. 482. 483.Pp 484. | 634the last set USB configuration. 635. 636This function returns zero on success else a LIBUSB20_ERROR value is 637returned. 638. 639.Pp 640. |
| 485.Fn libusb20_dev_set_power_mode pdev power_mode 486This function sets the power mode of the USB device. | 641.Fn libusb20_dev_set_power_mode 642sets the power mode of the USB device. |
| 487. 488Valid power modes: 489.Bl -tag 490.It LIBUSB20_POWER_OFF 491.It LIBUSB20_POWER_ON 492.It LIBUSB20_POWER_SAVE 493.It LIBUSB20_POWER_SUSPEND 494.It LIBUSB20_POWER_RESUME 495.El 496. 497This function returns zero on success else a LIBUSB20_ERROR value is 498returned. 499. 500.Pp 501. | 643. 644Valid power modes: 645.Bl -tag 646.It LIBUSB20_POWER_OFF 647.It LIBUSB20_POWER_ON 648.It LIBUSB20_POWER_SAVE 649.It LIBUSB20_POWER_SUSPEND 650.It LIBUSB20_POWER_RESUME 651.El 652. 653This function returns zero on success else a LIBUSB20_ERROR value is 654returned. 655. 656.Pp 657. |
| 502.Fn libusb20_dev_get_power_mode pdev 503This function returns the currently selected power mode for the given | 658.Fn libusb20_dev_get_power_mode 659returns the currently selected power mode for the given |
| 504USB device. 505. 506.Pp 507. | 660USB device. 661. 662.Pp 663. |
| 508.Fn libusb20_dev_set_alt_index pdev iface_index alt_index 509This function will try to set the given alternate index for the given | 664.Fn libusb20_dev_set_alt_index 665will try to set the given alternate index for the given |
| 510USB interface index. 511. 512This function returns zero on success else a LIBUSB20_ERROR value is 513returned. 514. 515.Pp 516. | 666USB interface index. 667. 668This function returns zero on success else a LIBUSB20_ERROR value is 669returned. 670. 671.Pp 672. |
| 517.Fn libusb20_dev_get_device_desc pdev 518This function returns a pointer to the decoded and host endian version | 673.Fn libusb20_dev_get_device_desc 674returns a pointer to the decoded and host endian version |
| 519of the device descriptor. 520. 521The USB device need not be opened when calling this function. 522. 523.Pp 524. | 675of the device descriptor. 676. 677The USB device need not be opened when calling this function. 678. 679.Pp 680. |
| 525.Fn libusb20_dev_alloc_config pdev config_index 526This function will read out and decode the USB config descriptor for | 681.Fn libusb20_dev_alloc_config 682will read out and decode the USB config descriptor for |
| 527the given USB device and config index. This function returns a pointer 528to the decoded configuration which must eventually be passed to 529free(). NULL is returned in case of failure. 530. 531.Pp 532. | 683the given USB device and config index. This function returns a pointer 684to the decoded configuration which must eventually be passed to 685free(). NULL is returned in case of failure. 686. 687.Pp 688. |
| 533.Fn libusb20_dev_alloc void 534This is an internal function to allocate a new USB device. | 689.Fn libusb20_dev_alloc 690is an internal function to allocate a new USB device. |
| 535. 536.Pp 537. | 691. 692.Pp 693. |
| 538.Fn libusb20_dev_get_address pdev 539This function returns the internal and not necessarily the real | 694.Fn libusb20_dev_get_address 695returns the internal and not necessarily the real |
| 540hardware address of the given USB device. 541. 542.Pp 543. | 696hardware address of the given USB device. 697. 698.Pp 699. |
| 544.Fn libusb20_dev_get_bus_number pdev 545This function return the internal bus number which the given USB | 700.Fn libusb20_dev_get_bus_number 701returns the internal bus number which the given USB |
| 546device belongs to. 547. 548.Pp 549. | 702device belongs to. 703. 704.Pp 705. |
| 550.Fn libusb20_dev_get_mode pdev 551This function returns the current operation mode of the USB entity. | 706.Fn libusb20_dev_get_mode 707returns the current operation mode of the USB entity. |
| 552. 553Valid return values are: 554.Bl -tag 555.It LIBUSB20_MODE_HOST 556.It LIBUSB20_MODE_DEVICE 557.El 558. 559.Pp 560. | 708. 709Valid return values are: 710.Bl -tag 711.It LIBUSB20_MODE_HOST 712.It LIBUSB20_MODE_DEVICE 713.El 714. 715.Pp 716. |
| 561.Fn libusb20_dev_get_speed pdev 562This function returns the current speed of the given USB device. | 717.Fn libusb20_dev_get_speed 718returns the current speed of the given USB device. |
| 563. 564.Bl -tag 565.It LIBUSB20_SPEED_UNKNOWN 566.It LIBUSB20_SPEED_LOW 567.It LIBUSB20_SPEED_FULL 568.It LIBUSB20_SPEED_HIGH 569.It LIBUSB20_SPEED_VARIABLE 570.It LIBUSB20_SPEED_SUPER 571.El 572. 573.Pp 574. | 719. 720.Bl -tag 721.It LIBUSB20_SPEED_UNKNOWN 722.It LIBUSB20_SPEED_LOW 723.It LIBUSB20_SPEED_FULL 724.It LIBUSB20_SPEED_HIGH 725.It LIBUSB20_SPEED_VARIABLE 726.It LIBUSB20_SPEED_SUPER 727.El 728. 729.Pp 730. |
| 575.Fn libusb20_dev_get_config_index pdev | 731.Fn libusb20_dev_get_config_index |
| 576This function returns the currently select config index for the given 577USB device. 578. 579.Pp 580. | 732This function returns the currently select config index for the given 733USB device. 734. 735.Pp 736. |
| 581.Fn libusb20_dev_free pdev 582This function will free the given USB device and all associated USB | 737.Fn libusb20_dev_free 738will free the given USB device and all associated USB |
| 583transfers. 584. 585.Pp 586. | 739transfers. 740. 741.Pp 742. |
| 587.Fn libusb20_dev_set_debug pdev debug_level 588This function will set the debug level for the given USB device. | 743.Fn libusb20_dev_set_debug 744will set the debug level for the given USB device. |
| 589. 590.Pp 591. | 745. 746.Pp 747. |
| 592.Fn libusb20_dev_wait_process pdev timeout 593This function will wait until a pending USB transfer has completed on | 748.Fn libusb20_dev_wait_process 749function will wait until a pending USB transfer has completed on |
| 594the given USB device. 595. 596A timeout value can be specified which is passed on to the 597.Xr 2 poll 598function. 599. 600.Sh USB BACKEND OPERATIONS 601. | 750the given USB device. 751. 752A timeout value can be specified which is passed on to the 753.Xr 2 poll 754function. 755. 756.Sh USB BACKEND OPERATIONS 757. |
| 602.Fn libusb20_be_get_template pbackend ptemp 603This function will return the currently selected global USB device | 758.Fn libusb20_be_get_template 759will return the currently selected global USB device |
| 604side mode template into the integer pointer 605.Fa ptemp . 606This function returns zero on success else a LIBUSB20_ERROR value is 607returned. 608. 609.Pp 610. | 760side mode template into the integer pointer 761.Fa ptemp . 762This function returns zero on success else a LIBUSB20_ERROR value is 763returned. 764. 765.Pp 766. |
| 611.Fn libusb20_be_set_template pbackend temp 612This function will set the global USB device side mode template to | 767.Fn libusb20_be_set_template 768will set the global USB device side mode template to |
| 613.Fa temp . 614The new template is not activated until after the next USB 615enumeration. 616The template number decides how the USB device will present itself to 617the USB Host, like Mass Storage Device, USB Ethernet Device. Also see 618the 619.Xr usb2_template 4 620module. 621This function returns zero on success else a LIBUSB20_ERROR value is 622returned. 623. 624.Pp 625. | 769.Fa temp . 770The new template is not activated until after the next USB 771enumeration. 772The template number decides how the USB device will present itself to 773the USB Host, like Mass Storage Device, USB Ethernet Device. Also see 774the 775.Xr usb2_template 4 776module. 777This function returns zero on success else a LIBUSB20_ERROR value is 778returned. 779. 780.Pp 781. |
| 626.Fn libusb20_be_get_dev_quirk pbackend index pquirk | 782.Fn libusb20_be_get_dev_quirk |
| 627This function will return the device quirk according to 628.Fa index 629into the libusb20_quirk structure pointed to by 630.Fa pq . 631This function returns zero on success else a LIBUSB20_ERROR value is 632returned. 633. 634If the given quirk does not exist LIBUSB20_ERROR_NOT_FOUND is 635returned. 636. 637.Pp 638. | 783This function will return the device quirk according to 784.Fa index 785into the libusb20_quirk structure pointed to by 786.Fa pq . 787This function returns zero on success else a LIBUSB20_ERROR value is 788returned. 789. 790If the given quirk does not exist LIBUSB20_ERROR_NOT_FOUND is 791returned. 792. 793.Pp 794. |
| 639.Fn libusb20_be_get_quirk_name pbackend index pquirk 640This function will return the quirk name according to | 795.Fn libusb20_be_get_quirk_name 796will return the quirk name according to |
| 641.Fa index 642into the libusb20_quirk structure pointed to by 643.Fa pq . 644This function returns zero on success else a LIBUSB20_ERROR value is 645returned. 646. 647If the given quirk does not exist LIBUSB20_ERROR_NOT_FOUND is 648returned. 649. 650.Pp 651. | 797.Fa index 798into the libusb20_quirk structure pointed to by 799.Fa pq . 800This function returns zero on success else a LIBUSB20_ERROR value is 801returned. 802. 803If the given quirk does not exist LIBUSB20_ERROR_NOT_FOUND is 804returned. 805. 806.Pp 807. |
| 652.Fn libusb20_be_add_dev_quirk pbackend pquirk 653This function will add the libusb20_quirk structure pointed to by the | 808.Fn libusb20_be_add_dev_quirk 809will add the libusb20_quirk structure pointed to by the |
| 654.Fa pq 655argument into the device quirk list. 656. 657This function returns zero on success else a LIBUSB20_ERROR value is 658returned. 659. 660If the given quirk cannot be added LIBUSB20_ERROR_NO_MEM is 661returned. 662. 663.Pp 664. | 810.Fa pq 811argument into the device quirk list. 812. 813This function returns zero on success else a LIBUSB20_ERROR value is 814returned. 815. 816If the given quirk cannot be added LIBUSB20_ERROR_NO_MEM is 817returned. 818. 819.Pp 820. |
| 665.Fn libusb20_be_remove_dev_quirk pbackend pquirk 666This function will remove the quirk matching the libusb20_quirk structure pointed to by the | 821.Fn libusb20_be_remove_dev_quirk 822will remove the quirk matching the libusb20_quirk structure pointed to by the |
| 667.Fa pq 668argument from the device quirk list. 669. 670This function returns zero on success else a LIBUSB20_ERROR value is 671returned. 672. 673If the given quirk does not exist LIBUSB20_ERROR_NOT_FOUND is 674returned. 675. | 823.Fa pq 824argument from the device quirk list. 825. 826This function returns zero on success else a LIBUSB20_ERROR value is 827returned. 828. 829If the given quirk does not exist LIBUSB20_ERROR_NOT_FOUND is 830returned. 831. |
| 676.Fn libusb20_be_alloc_linux void | 832.Fn libusb20_be_alloc_linux |
| 677These functions are used to allocate a specific USB backend or the 678operating system default USB backend. Allocating a backend is a way to 679scan for currently present USB devices. 680. 681.Pp 682. | 833These functions are used to allocate a specific USB backend or the 834operating system default USB backend. Allocating a backend is a way to 835scan for currently present USB devices. 836. 837.Pp 838. |
| 683.Fn libusb20_be_device_foreach pbackend pdev 684This function is used to iterate USB devices present in a USB backend. | 839.Fn libusb20_be_device_foreach 840is used to iterate USB devices present in a USB backend. |
| 685. 686The starting value of 687.Fa pdev 688is NULL. 689. 690This function returns the next USB device in the list. 691. 692If NULL is returned the end of the USB device list has been reached. 693. 694.Pp 695. | 841. 842The starting value of 843.Fa pdev 844is NULL. 845. 846This function returns the next USB device in the list. 847. 848If NULL is returned the end of the USB device list has been reached. 849. 850.Pp 851. |
| 696.Fn libusb20_be_dequeue_device pbackend pdev 697This function will dequeue the given USB device pointer from the | 852.Fn libusb20_be_dequeue_device 853will dequeue the given USB device pointer from the |
| 698backend USB device list. 699. 700Dequeued USB devices will not be freed when the backend is freed. 701. 702.Pp 703. | 854backend USB device list. 855. 856Dequeued USB devices will not be freed when the backend is freed. 857. 858.Pp 859. |
| 704.Fn libusb20_be_enqueue_device pbackend pdev | 860.Fn libusb20_be_enqueue_device |
| 705This function will enqueue the given USB device pointer in the backend USB device list. 706. 707Enqueued USB devices will get freed when the backend is freed. 708. 709.Pp 710. | 861This function will enqueue the given USB device pointer in the backend USB device list. 862. 863Enqueued USB devices will get freed when the backend is freed. 864. 865.Pp 866. |
| 711.Fn libusb20_be_free pbackend 712This function will free the given backend and all USB devices in its device list. | 867.Fn libusb20_be_free 868will free the given backend and all USB devices in its device list. |
| 713. 714. 715.Sh USB DESCRIPTOR PARSING 716. 717.Fn libusb20_me_get_1 pie offset 718This function will return a byte at the given byte offset of a message 719entity. 720. --- 81 unchanged lines hidden --- | 869. 870. 871.Sh USB DESCRIPTOR PARSING 872. 873.Fn libusb20_me_get_1 pie offset 874This function will return a byte at the given byte offset of a message 875entity. 876. --- 81 unchanged lines hidden --- |