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Message-ID: <20240211101324.37266-1-shresthprasad7@gmail.com> Date: Sun, 11 Feb 2024 15:43:24 +0530 From: Shresth Prasad <shresthprasad7@...il.com> To: gregkh@...uxfoundation.org, corbet@....net, shresthprasad7@...il.com Cc: linux-usb@...r.kernel.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, skhan@...uxfoundation.org, linux-kernel-mentees@...ts.linuxfoundation.org Subject: [PATCH] Fix malformed table error in gadget-testing.rst I've replaced all tabs with 8 spaces in gadget-testing.rst so that the document is easier to work with. This also fixes a malformed table error emitted while compliling the docs. Signed-off-by: Shresth Prasad <shresthprasad7@...il.com> --- Documentation/usb/gadget-testing.rst | 554 +++++++++++++-------------- 1 file changed, 277 insertions(+), 277 deletions(-) diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst index 077dfac7ed98..824a5a47d115 100644 --- a/Documentation/usb/gadget-testing.rst +++ b/Documentation/usb/gadget-testing.rst @@ -41,7 +41,7 @@ Function-specific configfs interface The function name to use when creating the function directory is "acm". The ACM function provides just one attribute in its function directory: - port_num + port_num The attribute is read-only. @@ -53,21 +53,21 @@ Testing the ACM function On the host:: - cat > /dev/ttyACM<X> + cat > /dev/ttyACM<X> On the device:: - cat /dev/ttyGS<Y> + cat /dev/ttyGS<Y> then the other way round On the device:: - cat > /dev/ttyGS<Y> + cat > /dev/ttyGS<Y> On the host:: - cat /dev/ttyACM<X> + cat /dev/ttyACM<X> 2. ECM function =============== @@ -80,15 +80,15 @@ Function-specific configfs interface The function name to use when creating the function directory is "ecm". The ECM function provides these attributes in its function directory: - =============== ================================================== - ifname network device interface name associated with this - function instance - qmult queue length multiplier for high and super speed - host_addr MAC address of host's end of this - Ethernet over USB link - dev_addr MAC address of device's end of this - Ethernet over USB link - =============== ================================================== + =============== ================================================== + ifname network device interface name associated with this + function instance + qmult queue length multiplier for high and super speed + host_addr MAC address of host's end of this + Ethernet over USB link + dev_addr MAC address of device's end of this + Ethernet over USB link + =============== ================================================== and after creating the functions/ecm.<instance name> they contain default values: qmult is 5, dev_addr and host_addr are randomly selected. @@ -103,11 +103,11 @@ Configure IP addresses of the device and the host. Then: On the device:: - ping <host's IP> + ping <host's IP> On the host:: - ping <device's IP> + ping <device's IP> 3. ECM subset function ====================== @@ -120,15 +120,15 @@ Function-specific configfs interface The function name to use when creating the function directory is "geth". The ECM subset function provides these attributes in its function directory: - =============== ================================================== - ifname network device interface name associated with this - function instance - qmult queue length multiplier for high and super speed - host_addr MAC address of host's end of this - Ethernet over USB link - dev_addr MAC address of device's end of this - Ethernet over USB link - =============== ================================================== + =============== ================================================== + ifname network device interface name associated with this + function instance + qmult queue length multiplier for high and super speed + host_addr MAC address of host's end of this + Ethernet over USB link + dev_addr MAC address of device's end of this + Ethernet over USB link + =============== ================================================== and after creating the functions/ecm.<instance name> they contain default values: qmult is 5, dev_addr and host_addr are randomly selected. @@ -143,11 +143,11 @@ Configure IP addresses of the device and the host. Then: On the device:: - ping <host's IP> + ping <host's IP> On the host:: - ping <device's IP> + ping <device's IP> 4. EEM function =============== @@ -160,15 +160,15 @@ Function-specific configfs interface The function name to use when creating the function directory is "eem". The EEM function provides these attributes in its function directory: - =============== ================================================== - ifname network device interface name associated with this - function instance - qmult queue length multiplier for high and super speed - host_addr MAC address of host's end of this - Ethernet over USB link - dev_addr MAC address of device's end of this - Ethernet over USB link - =============== ================================================== + =============== ================================================== + ifname network device interface name associated with this + function instance + qmult queue length multiplier for high and super speed + host_addr MAC address of host's end of this + Ethernet over USB link + dev_addr MAC address of device's end of this + Ethernet over USB link + =============== ================================================== and after creating the functions/eem.<instance name> they contain default values: qmult is 5, dev_addr and host_addr are randomly selected. @@ -183,11 +183,11 @@ Configure IP addresses of the device and the host. Then: On the device:: - ping <host's IP> + ping <host's IP> On the host:: - ping <device's IP> + ping <device's IP> 5. FFS function =============== @@ -224,13 +224,13 @@ Function-specific configfs interface The function name to use when creating the function directory is "hid". The HID function provides these attributes in its function directory: - =============== =========================================== - protocol HID protocol to use - report_desc data to be used in HID reports, except data - passed with /dev/hidg<X> - report_length HID report length - subclass HID subclass to use - =============== =========================================== + =============== =========================================== + protocol HID protocol to use + report_desc data to be used in HID reports, except data + passed with /dev/hidg<X> + report_length HID report length + subclass HID subclass to use + =============== =========================================== For a keyboard the protocol and the subclass are 1, the report_length is 8, while the report_desc is:: @@ -257,7 +257,7 @@ Device: - run a program which writes to /dev/hidg<N>, e.g. a userspace program found in Documentation/usb/gadget_hid.rst:: - $ ./hid_gadget_test /dev/hidg0 keyboard + $ ./hid_gadget_test /dev/hidg0 keyboard Host: @@ -274,10 +274,10 @@ Function-specific configfs interface The function name to use when creating the function directory is "Loopback". The LOOPBACK function provides these attributes in its function directory: - =============== ======================= - qlen depth of loopback queue - bulk_buflen buffer length - =============== ======================= + =============== ======================= + qlen depth of loopback queue + bulk_buflen buffer length + =============== ======================= Testing the LOOPBACK function ----------------------------- @@ -298,20 +298,20 @@ The function name to use when creating the function directory is "mass_storage". The MASS STORAGE function provides these attributes in its directory: files: - =============== ============================================== - stall Set to permit function to halt bulk endpoints. - Disabled on some USB devices known not to work - correctly. You should set it to true. - num_buffers Number of pipeline buffers. Valid numbers - are 2..4. Available only if - CONFIG_USB_GADGET_DEBUG_FILES is set. - =============== ============================================== + =============== ============================================== + stall Set to permit function to halt bulk endpoints. + Disabled on some USB devices known not to work + correctly. You should set it to true. + num_buffers Number of pipeline buffers. Valid numbers + are 2..4. Available only if + CONFIG_USB_GADGET_DEBUG_FILES is set. + =============== ============================================== and a default lun.0 directory corresponding to SCSI LUN #0. A new lun can be added with mkdir:: - $ mkdir functions/mass_storage.0/partition.5 + $ mkdir functions/mass_storage.0/partition.5 Lun numbering does not have to be continuous, except for lun #0 which is created by default. A maximum of 8 luns can be specified and they all must be @@ -321,26 +321,26 @@ although it is not mandatory. In each lun directory there are the following attribute files: - =============== ============================================== - file The path to the backing file for the LUN. - Required if LUN is not marked as removable. - ro Flag specifying access to the LUN shall be - read-only. This is implied if CD-ROM emulation - is enabled as well as when it was impossible - to open "filename" in R/W mode. - removable Flag specifying that LUN shall be indicated as - being removable. - cdrom Flag specifying that LUN shall be reported as - being a CD-ROM. - nofua Flag specifying that FUA flag - in SCSI WRITE(10,12) - forced_eject This write-only file is useful only when - the function is active. It causes the backing - file to be forcibly detached from the LUN, - regardless of whether the host has allowed it. - Any non-zero number of bytes written will - result in ejection. - =============== ============================================== + =============== ============================================== + file The path to the backing file for the LUN. + Required if LUN is not marked as removable. + ro Flag specifying access to the LUN shall be + read-only. This is implied if CD-ROM emulation + is enabled as well as when it was impossible + to open "filename" in R/W mode. + removable Flag specifying that LUN shall be indicated as + being removable. + cdrom Flag specifying that LUN shall be reported as + being a CD-ROM. + nofua Flag specifying that FUA flag + in SCSI WRITE(10,12) + forced_eject This write-only file is useful only when + the function is active. It causes the backing + file to be forcibly detached from the LUN, + regardless of whether the host has allowed it. + Any non-zero number of bytes written will + result in ejection. + =============== ============================================== Testing the MASS STORAGE function --------------------------------- @@ -360,14 +360,14 @@ Function-specific configfs interface The function name to use when creating the function directory is "midi". The MIDI function provides these attributes in its function directory: - =============== ==================================== - buflen MIDI buffer length - id ID string for the USB MIDI adapter - in_ports number of MIDI input ports - index index value for the USB MIDI adapter - out_ports number of MIDI output ports - qlen USB read request queue length - =============== ==================================== + =============== ==================================== + buflen MIDI buffer length + id ID string for the USB MIDI adapter + in_ports number of MIDI input ports + index index value for the USB MIDI adapter + out_ports number of MIDI output ports + qlen USB read request queue length + =============== ==================================== Testing the MIDI function ------------------------- @@ -448,17 +448,17 @@ Function-specific configfs interface The function name to use when creating the function directory is "ncm". The NCM function provides these attributes in its function directory: - ======================= ================================================== - ifname network device interface name associated with this - function instance - qmult queue length multiplier for high and super speed - host_addr MAC address of host's end of this - Ethernet over USB link - dev_addr MAC address of device's end of this - Ethernet over USB link - max_segment_size Segment size required for P2P connections. This - will set MTU to 14 bytes - ======================= ================================================== + ======================= ================================================== + ifname network device interface name associated with this + function instance + qmult queue length multiplier for high and super speed + host_addr MAC address of host's end of this + Ethernet over USB link + dev_addr MAC address of device's end of this + Ethernet over USB link + max_segment_size Segment size required for P2P connections. This + will set MTU to 14 bytes + ======================= ================================================== and after creating the functions/ncm.<instance name> they contain default values: qmult is 5, dev_addr and host_addr are randomly selected. @@ -473,11 +473,11 @@ Configure IP addresses of the device and the host. Then: On the device:: - ping <host's IP> + ping <host's IP> On the host:: - ping <device's IP> + ping <device's IP> 11. OBEX function ================= @@ -490,7 +490,7 @@ Function-specific configfs interface The function name to use when creating the function directory is "obex". The OBEX function provides just one attribute in its function directory: - port_num + port_num The attribute is read-only. @@ -501,16 +501,16 @@ Testing the OBEX function On device:: - seriald -f /dev/ttyGS<Y> -s 1024 + seriald -f /dev/ttyGS<Y> -s 1024 On host:: - serialc -v <vendorID> -p <productID> -i<interface#> -a1 -s1024 \ - -t<out endpoint addr> -r<in endpoint addr> + serialc -v <vendorID> -p <productID> -i<interface#> -a1 -s1024 \ + -t<out endpoint addr> -r<in endpoint addr> where seriald and serialc are Felipe's utilities found here: - https://github.com/felipebalbi/usb-tools.git master + https://github.com/felipebalbi/usb-tools.git master 12. PHONET function =================== @@ -523,10 +523,10 @@ Function-specific configfs interface The function name to use when creating the function directory is "phonet". The PHONET function provides just one attribute in its function directory: - =============== ================================================== - ifname network device interface name associated with this - function instance - =============== ================================================== + =============== ================================================== + ifname network device interface name associated with this + function instance + =============== ================================================== Testing the PHONET function --------------------------- @@ -543,39 +543,39 @@ git://git.gitorious.org/meego-cellular/phonet-utils.git On the host:: - $ ./phonet -a 0x10 -i usbpn0 - $ ./pnroute add 0x6c usbpn0 - $./pnroute add 0x10 usbpn0 - $ ifconfig usbpn0 up + $ ./phonet -a 0x10 -i usbpn0 + $ ./pnroute add 0x6c usbpn0 + $./pnroute add 0x10 usbpn0 + $ ifconfig usbpn0 up On the device:: - $ ./phonet -a 0x6c -i upnlink0 - $ ./pnroute add 0x10 upnlink0 - $ ifconfig upnlink0 up + $ ./phonet -a 0x6c -i upnlink0 + $ ./pnroute add 0x10 upnlink0 + $ ifconfig upnlink0 up Then a test program can be used:: - http://www.spinics.net/lists/linux-usb/msg85690.html + http://www.spinics.net/lists/linux-usb/msg85690.html On the device:: - $ ./pnxmit -a 0x6c -r + $ ./pnxmit -a 0x6c -r On the host:: - $ ./pnxmit -a 0x10 -s 0x6c + $ ./pnxmit -a 0x10 -s 0x6c As a result some data should be sent from host to device. Then the other way round: On the host:: - $ ./pnxmit -a 0x10 -r + $ ./pnxmit -a 0x10 -r On the device:: - $ ./pnxmit -a 0x6c -s 0x10 + $ ./pnxmit -a 0x6c -s 0x10 13. RNDIS function ================== @@ -588,15 +588,15 @@ Function-specific configfs interface The function name to use when creating the function directory is "rndis". The RNDIS function provides these attributes in its function directory: - =============== ================================================== - ifname network device interface name associated with this - function instance - qmult queue length multiplier for high and super speed - host_addr MAC address of host's end of this - Ethernet over USB link - dev_addr MAC address of device's end of this - Ethernet over USB link - =============== ================================================== + =============== ================================================== + ifname network device interface name associated with this + function instance + qmult queue length multiplier for high and super speed + host_addr MAC address of host's end of this + Ethernet over USB link + dev_addr MAC address of device's end of this + Ethernet over USB link + =============== ================================================== and after creating the functions/rndis.<instance name> they contain default values: qmult is 5, dev_addr and host_addr are randomly selected. @@ -611,11 +611,11 @@ Configure IP addresses of the device and the host. Then: On the device:: - ping <host's IP> + ping <host's IP> On the host:: - ping <device's IP> + ping <device's IP> 14. SERIAL function =================== @@ -628,7 +628,7 @@ Function-specific configfs interface The function name to use when creating the function directory is "gser". The SERIAL function provides just one attribute in its function directory: - port_num + port_num The attribute is read-only. @@ -639,26 +639,26 @@ Testing the SERIAL function On host:: - insmod usbserial - echo VID PID >/sys/bus/usb-serial/drivers/generic/new_id + insmod usbserial + echo VID PID >/sys/bus/usb-serial/drivers/generic/new_id On host:: - cat > /dev/ttyUSB<X> + cat > /dev/ttyUSB<X> On target:: - cat /dev/ttyGS<Y> + cat /dev/ttyGS<Y> then the other way round On target:: - cat > /dev/ttyGS<Y> + cat > /dev/ttyGS<Y> On host:: - cat /dev/ttyUSB<X> + cat /dev/ttyUSB<X> 15. SOURCESINK function ======================= @@ -671,16 +671,16 @@ Function-specific configfs interface The function name to use when creating the function directory is "SourceSink". The SOURCESINK function provides these attributes in its function directory: - =============== ================================== - pattern 0 (all zeros), 1 (mod63), 2 (none) - isoc_interval 1..16 - isoc_maxpacket 0 - 1023 (fs), 0 - 1024 (hs/ss) - isoc_mult 0..2 (hs/ss only) - isoc_maxburst 0..15 (ss only) - bulk_buflen buffer length - bulk_qlen depth of queue for bulk - iso_qlen depth of queue for iso - =============== ================================== + =============== ================================== + pattern 0 (all zeros), 1 (mod63), 2 (none) + isoc_interval 1..16 + isoc_maxpacket 0 - 1023 (fs), 0 - 1024 (hs/ss) + isoc_mult 0..2 (hs/ss only) + isoc_maxburst 0..15 (ss only) + bulk_buflen buffer length + bulk_qlen depth of queue for bulk + iso_qlen depth of queue for iso + =============== ================================== Testing the SOURCESINK function ------------------------------- @@ -702,14 +702,14 @@ The function name to use when creating the function directory is "uac1_legacy". The uac1 function provides these attributes in its function directory: - =============== ==================================== - audio_buf_size audio buffer size - fn_cap capture pcm device file name - fn_cntl control device file name - fn_play playback pcm device file name - req_buf_size ISO OUT endpoint request buffer size - req_count ISO OUT endpoint request count - =============== ==================================== + =============== ==================================== + audio_buf_size audio buffer size + fn_cap capture pcm device file name + fn_cntl control device file name + fn_play playback pcm device file name + req_buf_size ISO OUT endpoint request buffer size + req_count ISO OUT endpoint request count + =============== ==================================== The attributes have sane default values. @@ -720,7 +720,7 @@ device: run the gadget host:: - aplay -l # should list our USB Audio Gadget + aplay -l # should list our USB Audio Gadget 17. UAC2 function ================= @@ -733,33 +733,33 @@ Function-specific configfs interface The function name to use when creating the function directory is "uac2". The uac2 function provides these attributes in its function directory: - ================ ==================================================== - c_chmask capture channel mask - c_srate list of capture sampling rates (comma-separated) - c_ssize capture sample size (bytes) - c_sync capture synchronization type (async/adaptive) - c_mute_present capture mute control enable - c_volume_present capture volume control enable - c_volume_min capture volume control min value (in 1/256 dB) - c_volume_max capture volume control max value (in 1/256 dB) - c_volume_res capture volume control resolution (in 1/256 dB) - c_hs_bint capture bInterval for HS/SS (1-4: fixed, 0: auto) - fb_max maximum extra bandwidth in async mode - p_chmask playback channel mask - p_srate list of playback sampling rates (comma-separated) - p_ssize playback sample size (bytes) - p_mute_present playback mute control enable - p_volume_present playback volume control enable - p_volume_min playback volume control min value (in 1/256 dB) - p_volume_max playback volume control max value (in 1/256 dB) - p_volume_res playback volume control resolution (in 1/256 dB) - p_hs_bint playback bInterval for HS/SS (1-4: fixed, 0: auto) - req_number the number of pre-allocated request for both capture - and playback - function_name name of the interface - c_terminal_type code of the capture terminal type - p_terminal_type code of the playback terminal type - ================ ==================================================== + ================ ==================================================== + c_chmask capture channel mask + c_srate list of capture sampling rates (comma-separated) + c_ssize capture sample size (bytes) + c_sync capture synchronization type (async/adaptive) + c_mute_present capture mute control enable + c_volume_present capture volume control enable + c_volume_min capture volume control min value (in 1/256 dB) + c_volume_max capture volume control max value (in 1/256 dB) + c_volume_res capture volume control resolution (in 1/256 dB) + c_hs_bint capture bInterval for HS/SS (1-4: fixed, 0: auto) + fb_max maximum extra bandwidth in async mode + p_chmask playback channel mask + p_srate list of playback sampling rates (comma-separated) + p_ssize playback sample size (bytes) + p_mute_present playback mute control enable + p_volume_present playback volume control enable + p_volume_min playback volume control min value (in 1/256 dB) + p_volume_max playback volume control max value (in 1/256 dB) + p_volume_res playback volume control resolution (in 1/256 dB) + p_hs_bint playback bInterval for HS/SS (1-4: fixed, 0: auto) + req_number the number of pre-allocated request for both capture + and playback + function_name name of the interface + c_terminal_type code of the capture terminal type + p_terminal_type code of the playback terminal type + ================ ==================================================== The attributes have sane default values. @@ -774,12 +774,12 @@ sends a stream of audio data to/from the host. In order to actually hear something at the device side, a command similar to this must be used at the device side:: - $ arecord -f dat -t wav -D hw:2,0 | aplay -D hw:0,0 & + $ arecord -f dat -t wav -D hw:2,0 | aplay -D hw:0,0 & e.g.:: - $ arecord -f dat -t wav -D hw:CARD=UAC2Gadget,DEV=0 | \ - aplay -D default:CARD=OdroidU3 + $ arecord -f dat -t wav -D hw:CARD=UAC2Gadget,DEV=0 | \ + aplay -D default:CARD=OdroidU3 18. UVC function ================ @@ -792,30 +792,30 @@ Function-specific configfs interface The function name to use when creating the function directory is "uvc". The uvc function provides these attributes in its function directory: - =================== ================================================ - streaming_interval interval for polling endpoint for data transfers - streaming_maxburst bMaxBurst for super speed companion descriptor - streaming_maxpacket maximum packet size this endpoint is capable of - sending or receiving when this configuration is - selected - function_name name of the interface - =================== ================================================ + =================== ================================================ + streaming_interval interval for polling endpoint for data transfers + streaming_maxburst bMaxBurst for super speed companion descriptor + streaming_maxpacket maximum packet size this endpoint is capable of + sending or receiving when this configuration is + selected + function_name name of the interface + =================== ================================================ There are also "control" and "streaming" subdirectories, each of which contain a number of their subdirectories. There are some sane defaults provided, but the user must provide the following: - ================== ==================================================== - control header create in control/header, link from control/class/fs - and/or control/class/ss - streaming header create in streaming/header, link from - streaming/class/fs and/or streaming/class/hs and/or - streaming/class/ss - format description create in streaming/mjpeg and/or - streaming/uncompressed - frame description create in streaming/mjpeg/<format> and/or in - streaming/uncompressed/<format> - ================== ==================================================== + ================== ==================================================== + control header create in control/header, link from control/class/fs + and/or control/class/ss + streaming header create in streaming/header, link from + streaming/class/fs and/or streaming/class/hs and/or + streaming/class/ss + format description create in streaming/mjpeg and/or + streaming/uncompressed + frame description create in streaming/mjpeg/<format> and/or in + streaming/uncompressed/<format> + ================== ==================================================== Each frame description contains frame interval specification, and each such specification consists of a number of lines with an interval value @@ -851,15 +851,15 @@ device: run the gadget, modprobe vivid:: # uvc-gadget -u /dev/video<uvc video node #> -v /dev/video<vivid video node #> where uvc-gadget is this program: - http://git.ideasonboard.org/uvc-gadget.git + http://git.ideasonboard.org/uvc-gadget.git with these patches: - http://www.spinics.net/lists/linux-usb/msg99220.html + http://www.spinics.net/lists/linux-usb/msg99220.html host:: - luvcview -f yuv + luvcview -f yuv 19. PRINTER function ==================== @@ -872,10 +872,10 @@ Function-specific configfs interface The function name to use when creating the function directory is "printer". The printer function provides these attributes in its function directory: - ========== =========================================== - pnp_string Data to be passed to the host in pnp string - q_len Number of requests per endpoint - ========== =========================================== + ========== =========================================== + pnp_string Data to be passed to the host in pnp string + q_len Number of requests per endpoint + ========== =========================================== Testing the PRINTER function ---------------------------- @@ -884,7 +884,7 @@ The most basic testing: device: run the gadget:: - # ls -l /devices/virtual/usb_printer_gadget/ + # ls -l /devices/virtual/usb_printer_gadget/ should show g_printer<number>. @@ -898,19 +898,19 @@ host->device transmission: device:: - # cat /dev/g_printer<number> + # cat /dev/g_printer<number> host:: - # cat > /dev/usb/lp0 + # cat > /dev/usb/lp0 device->host transmission:: - # cat > /dev/g_printer<number> + # cat > /dev/g_printer<number> host:: - # cat /dev/usb/lp0 + # cat /dev/usb/lp0 More advanced testing can be done with the prn_example described in Documentation/usb/gadget_printer.rst. @@ -929,27 +929,27 @@ Function-specific configfs interface The function name to use when creating the function directory is "uac1". The uac1 function provides these attributes in its function directory: - ================ ==================================================== - c_chmask capture channel mask - c_srate list of capture sampling rates (comma-separated) - c_ssize capture sample size (bytes) - c_mute_present capture mute control enable - c_volume_present capture volume control enable - c_volume_min capture volume control min value (in 1/256 dB) - c_volume_max capture volume control max value (in 1/256 dB) - c_volume_res capture volume control resolution (in 1/256 dB) - p_chmask playback channel mask - p_srate list of playback sampling rates (comma-separated) - p_ssize playback sample size (bytes) - p_mute_present playback mute control enable - p_volume_present playback volume control enable - p_volume_min playback volume control min value (in 1/256 dB) - p_volume_max playback volume control max value (in 1/256 dB) - p_volume_res playback volume control resolution (in 1/256 dB) - req_number the number of pre-allocated requests for both capture - and playback - function_name name of the interface - ================ ==================================================== + ================ ==================================================== + c_chmask capture channel mask + c_srate list of capture sampling rates (comma-separated) + c_ssize capture sample size (bytes) + c_mute_present capture mute control enable + c_volume_present capture volume control enable + c_volume_min capture volume control min value (in 1/256 dB) + c_volume_max capture volume control max value (in 1/256 dB) + c_volume_res capture volume control resolution (in 1/256 dB) + p_chmask playback channel mask + p_srate list of playback sampling rates (comma-separated) + p_ssize playback sample size (bytes) + p_mute_present playback mute control enable + p_volume_present playback volume control enable + p_volume_min playback volume control min value (in 1/256 dB) + p_volume_max playback volume control max value (in 1/256 dB) + p_volume_res playback volume control resolution (in 1/256 dB) + req_number the number of pre-allocated requests for both capture + and playback + function_name name of the interface + ================ ==================================================== The attributes have sane default values. @@ -964,12 +964,12 @@ sends a stream of audio data to/from the host. In order to actually hear something at the device side, a command similar to this must be used at the device side:: - $ arecord -f dat -t wav -D hw:2,0 | aplay -D hw:0,0 & + $ arecord -f dat -t wav -D hw:2,0 | aplay -D hw:0,0 & e.g.:: - $ arecord -f dat -t wav -D hw:CARD=UAC1Gadget,DEV=0 | \ - aplay -D default:CARD=OdroidU3 + $ arecord -f dat -t wav -D hw:CARD=UAC1Gadget,DEV=0 | \ + aplay -D default:CARD=OdroidU3 21. MIDI2 function @@ -988,49 +988,49 @@ The function name to use when creating the function directory is "midi2". The midi2 function provides these attributes in its function directory as the card top-level information: - ============= ================================================= - process_ump Bool flag to process UMP Stream messages (0 or 1) - static_block Bool flag for static blocks (0 or 1) - iface_name Optional interface name string - ============= ================================================= + ============= ================================================= + process_ump Bool flag to process UMP Stream messages (0 or 1) + static_block Bool flag for static blocks (0 or 1) + iface_name Optional interface name string + ============= ================================================= The directory contains a subdirectory "ep.0", and this provides the attributes for a UMP Endpoint (which is a pair of USB MIDI Endpoints): - ============= ================================================= - protocol_caps MIDI protocol capabilities; - 1: MIDI 1.0, 2: MIDI 2.0, or 3: both protocols - protocol Default MIDI protocol (either 1 or 2) - ep_name UMP Endpoint name string - product_id Product ID string - manufacturer Manufacture ID number (24 bit) - family Device family ID number (16 bit) - model Device model ID number (16 bit) - sw_revision Software revision (32 bit) - ============= ================================================= + ============= ================================================= + protocol_caps MIDI protocol capabilities; + 1: MIDI 1.0, 2: MIDI 2.0, or 3: both protocols + protocol Default MIDI protocol (either 1 or 2) + ep_name UMP Endpoint name string + product_id Product ID string + manufacturer Manufacture ID number (24 bit) + family Device family ID number (16 bit) + model Device model ID number (16 bit) + sw_revision Software revision (32 bit) + ============= ================================================= Each Endpoint subdirectory contains a subdirectory "block.0", which represents the Function Block for Block 0 information. Its attributes are: - ================= =============================================== - name Function Block name string - direction Direction of this FB - 1: input, 2: output, or 3: bidirectional - first_group The first UMP Group number (0-15) - num_groups The number of groups in this FB (1-16) - midi1_first_group The first UMP Group number for MIDI 1.0 (0-15) - midi1_num_groups The number of groups for MIDI 1.0 (0-16) - ui_hint UI-hint of this FB - 0: unknown, 1: receiver, 2: sender, 3: both - midi_ci_verison Supported MIDI-CI version number (8 bit) - is_midi1 Legacy MIDI 1.0 device (0-2) - 0: MIDI 2.0 device, - 1: MIDI 1.0 without restriction, or - 2: MIDI 1.0 with low speed - sysex8_streams Max number of SysEx8 streams (8 bit) - active Bool flag for FB activity (0 or 1) - ================= =============================================== + ================= =============================================== + name Function Block name string + direction Direction of this FB + 1: input, 2: output, or 3: bidirectional + first_group The first UMP Group number (0-15) + num_groups The number of groups in this FB (1-16) + midi1_first_group The first UMP Group number for MIDI 1.0 (0-15) + midi1_num_groups The number of groups for MIDI 1.0 (0-16) + ui_hint UI-hint of this FB + 0: unknown, 1: receiver, 2: sender, 3: both + midi_ci_verison Supported MIDI-CI version number (8 bit) + is_midi1 Legacy MIDI 1.0 device (0-2) + 0: MIDI 2.0 device, + 1: MIDI 1.0 without restriction, or + 2: MIDI 1.0 with low speed + sysex8_streams Max number of SysEx8 streams (8 bit) + active Bool flag for FB activity (0 or 1) + ================= =============================================== If multiple Function Blocks are required, you can add more Function Blocks by creating subdirectories "block.<num>" with the corresponding -- 2.43.0
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