lowlander / dmx_usb_module Goto Github PK
View Code? Open in Web Editor NEWLinux kernel module for Enttec Open DMX dongle
Home Page: http://www.erwinrol.com/open-dmx-usb-linux-driver/
License: GNU General Public License v2.0
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mixman68 drewp xavierp56 romarcha foxdog-studios muxlux jiuzhuaxiong xorman edwin-oetelaar julia-otran sfera-labs aduskettdmx_usb_module's Issues
Interested in docu contributions?
Hi, I've used your module now on a few different debian boxes (x86) for cheap dmx <> artnet converters, using the $15 dollar USB > DMX adapters off of amazon, which are also just FTDI converters like the Open DMX. Your module works great with them. I've written up instructions/documentation on how to compile and install it on modern apt based systems (both 4.x and 5.x kernel, seems to work great on both). I could submit it as a pull request so your git repo has instructions besides rasPI, would it be best to add it to readme.md or elsewhere?
timing problems on new kernel
I'm on ubuntu 64-bit with kernel 3.5.0-30-generic and things are not going well. I had to add an err() macro (see drewp@129aa31) but now I get lots of corruption on the output: https://www.youtube.com/watch?v=NLrY3HrXR3k .
Notably, when I output r/g/b to channels 50,51,52, my device shows black unless I dial its dmx offset down to 47.
Problems compiling source
make -C /lib/modules/5.15.0-46-generic/build M=/home/dmx/dmx_usb_module
make[1]: Entering directory '/usr/src/linux-headers-5.15.0-46-generic'
CC [M] /home/dmx/dmx_usb_module/dmx_usb.o
In file included from ./include/linux/kernel.h:19,
from /home/dmx/dmx_usb_module/dmx_usb.c:16:
/home/dmx/dmx_usb_module/dmx_usb.c: In function ‘dmx_usb_write’:
./include/linux/kern_levels.h:5:18: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘size_t’ {aka ‘long unsigned int’} [-Wformat=]
5 | #define KERN_SOH "\001" /* ASCII Start Of Header /
| ^~~~~~
./include/linux/printk.h:422:11: note: in definition of macro ‘printk_index_wrap’
422 | _p_func(_fmt, ##VA_ARGS);
| ^~~~
/home/dmx/dmx_usb_module/dmx_usb.c:41:45: note: in expansion of macro ‘printk’
41 | #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG FILE ": " format "\n" , ## arg); } while (0)
| ^~~~~~
./include/linux/kern_levels.h:15:20: note: in expansion of macro ‘KERN_SOH’
15 | #define KERN_DEBUG KERN_SOH "7" / debug-level messages */
| ^~~~~~~~
/home/dmx/dmx_usb_module/dmx_usb.c:41:52: note: in expansion of macro ‘KERN_DEBUG’
41 | #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG FILE ": " format "\n" , ## arg); } while (0)
| ^~~~~~~~~~
/home/dmx/dmx_usb_module/dmx_usb.c:409:2: note: in expansion of macro ‘dbg’
409 | dbg("%s - minor %d, count = %d", FUNCTION, dev->minor, count);
| ^~~
MODPOST /home/dmx/dmx_usb_module/Module.symvers
CC [M] /home/dmx/dmx_usb_module/dmx_usb.mod.o
LD [M] /home/dmx/dmx_usb_module/dmx_usb.ko
BTF [M] /home/dmx/dmx_usb_module/dmx_usb.ko
Skipping BTF generation for /home/dmx/dmx_usb_module/dmx_usb.ko due to unavailability of vmlinux
make[1]: Leaving directory '/usr/src/linux-headers-5.15.0-46-generic'
gcc -O2 -pipe -Wall dmx_usb_test.c -o dmx_usb_test
module crashes on recent kernels
I had to apply https://github.com/openwrt/packages/blob/master/libs/dmx_usb_module/patches/002-fix-build-4.14.patch to get it to build. Yet dmx_usb_test fails and causes a kernel stack dump.
The driver loads and probes the devices successfully, everything looks normal:
[ 1.686732] usb 2-1.1: new full-speed USB device number 3 using ehci-pci
[ 1.790360] usb 2-1.1: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
[ 1.790367] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1.790372] usb 2-1.1: Product: DMX USB PRO
[ 1.790376] usb 2-1.1: Manufacturer: ENTTEC
[ 1.790381] usb 2-1.1: SerialNumber: EN172833
...
[ 2.554415] /usr/src/dmx_usb_module-20130818/dmx_usb.c: DMX USB device now attached to dmx0
[ 2.554415] /usr/src/dmx_usb_module-20130818/dmx_usb.c: DMX USB device now attached to dmx0
[ 2.554457] usbcore: registered new interface driver dmx_usb
[ 2.554458] /usr/src/dmx_usb_module-20130818/dmx_usb.c: DMX USB Driver v0.1.20130818
Running dmx_usb_test fails:
./dmx_usb_test
write: Bad address
and causes this:
[ 38.470537] ------------[ cut here ]------------
[ 38.470540] transfer buffer not dma capable
[ 38.470691] WARNING: CPU: 0 PID: 1047 at drivers/usb/core/hcd.c:1586 usb_hcd_map_urb_for_dma+0x413/0x570 [usbcore]
[ 38.470693] Modules linked in: rfcomm fuse bnep sunrpc dm_crypt algif_skcipher af_alg joydev mousedev i915 intel_powerclamp coretemp arc4 kvm_intel dell_wmi snd_hda_codec_hdmi wmi_bmof sparse_keymap kvm gpio_ich iTCO_wdt iwldvm iTCO_vendor_support dell_rbtn snd_hda_codec_idt nls_iso8859_1 snd_hda_codec_generic nls_cp437 ppdev vfat mac80211 fat snd_hda_intel dell_laptop snd_hda_codec irqbypass dell_smbios i2c_algo_bit iwlwifi dm_mod crct10dif_pclmul dell_wmi_descriptor crc32_pclmul drm_kms_helper dcdbas uvcvideo ghash_clmulni_intel videobuf2_vmalloc snd_hda_core pcbc dell_smm_hwmon videobuf2_memops videobuf2_v4l2 snd_hwdep aesni_intel btusb btrtl btbcm videobuf2_common aes_x86_64 crypto_simd btintel cryptd glue_helper intel_cstate intel_uncore drm cfg80211 bluetooth psmouse input_leds snd_pcm pcspkr
[ 38.470770] videodev snd_timer dmx_usb(O) media snd e1000e intel_agp ecdh_generic intel_gtt intel_ips soundcore lpc_ich agpgart rfkill syscopyarea tpm_tis sysfillrect sysimgblt fb_sys_fops i2c_i801 wmi tpm_tis_core tpm rtc_cmos parport_pc rng_core parport dell_smo8800 evdev mac_hid pcc_cpufreq battery ac acpi_cpufreq sg vhba(O) crypto_user binder_linux(O) ashmem_linux(O) ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 fscrypto sr_mod cdrom sd_mod serio_raw atkbd libps2 ahci sdhci_pci cqhci libahci sdhci crc32c_intel led_class ehci_pci libata ehci_hcd scsi_mod mmc_core usbcore usb_common i8042 serio
[ 38.470847] CPU: 0 PID: 1047 Comm: dmx_usb_test Tainted: G O 4.18.1-arch1-1-ARCH #1
[ 38.470849] Hardware name: Dell Inc. Latitude E4310/0D8H24, BIOS A15 05/12/2017
[ 38.470865] RIP: 0010:usb_hcd_map_urb_for_dma+0x413/0x570 [usbcore]
[ 38.470866] Code: 39 c9 73 30 80 3d 8d c6 02 00 00 41 bd f5 ff ff ff 0f 85 57 ff ff ff 48 c7 c7 88 1e 26 c0 c6 05 73 c6 02 00 01 e8 f7 42 63 d6 <0f> 0b 8b 53 64 e9 3a ff ff ff 65 48 8b 0c 25 00 5c 01 00 48 8b 49
[ 38.470926] RSP: 0018:ffffa45903407cc8 EFLAGS: 00010282
[ 38.470930] RAX: 0000000000000000 RBX: ffffa085a9fbc180 RCX: 0000000000000001
[ 38.470932] RDX: 0000000080000001 RSI: ffffffff97681166 RDI: 00000000ffffffff
[ 38.470934] RBP: ffffa085d3189000 R08: 0000000000000001 R09: 000000000000036b
[ 38.470936] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000600000
[ 38.470938] R13: 00000000fffffff5 R14: 00007ffcc18ff4e0 R15: 0000000000000000
[ 38.470942] FS: 00007fa041039500(0000) GS:ffffa085dfc00000(0000) knlGS:0000000000000000
[ 38.470944] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 38.470946] CR2: 000055ddc0999004 CR3: 00000001f8dae006 CR4: 00000000000206f0
[ 38.470948] Call Trace:
[ 38.470969] usb_hcd_submit_urb+0x38d/0xb30 [usbcore]
[ 38.470977] ? path_openat+0x400/0x14b0
[ 38.470982] ? __do_page_fault+0x237/0x570
[ 38.470999] usb_start_wait_urb+0x65/0x160 [usbcore]
[ 38.471007] dmx_usb_write+0x115/0x1e0 [dmx_usb]
[ 38.471016] __vfs_write+0x36/0x190
[ 38.471022] ? __audit_syscall_entry+0xd7/0x160
[ 38.471028] ? syscall_slow_exit_work+0x19b/0x1b0
[ 38.471033] vfs_write+0xa9/0x190
[ 38.471037] ksys_write+0x4f/0xb0
[ 38.471042] do_syscall_64+0x5b/0x170
[ 38.471050] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 38.471054] RIP: 0033:0x7fa040f607a8
[ 38.471055] Code: 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 8d 05 95 6d 0d 00 8b 00 85 c0 75 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 41 54 49 89 d4 55
[ 38.471115] RSP: 002b:00007ffcc18ff4d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 38.471118] RAX: ffffffffffffffda RBX: 00007ffcc18ff4e0 RCX: 00007fa040f607a8
[ 38.471120] RDX: 0000000000000201 RSI: 00007ffcc18ff4e0 RDI: 0000000000000003
[ 38.471123] RBP: 0000000000000003 R08: 00007fa041033be0 R09: 00007fa041033be0
[ 38.471124] R10: 0000000000000000 R11: 0000000000000246 R12: 000055ddc0998110
[ 38.471126] R13: 00007ffcc18ff7e0 R14: 0000000000000000 R15: 0000000000000000
[ 38.471131] ---[ end trace 43b3ea1ef0fbbf06 ]---
Any ideas? @NeoRaider @FriedZombie
dmx_usb_module failed to build on kernel 6.6
Hi,
When I tried to build dmx_usb_module for Linux Kernel 6.6.18, I got following error.
Could you help?
Thanks,
CC [M] /home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.o
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c:100:47: error: macro "DEFINE_SEMAPHORE" requires 2 arguments, but only 1 given
100 | static DEFINE_SEMAPHORE(disconnect_sem);
| ^
In file included from ./include/linux/fs.h:25,
from ./arch/arm64/include/asm/elf.h:141,
from ./include/linux/elf.h:6,
from ./include/linux/module.h:19,
from /home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c:20:
./include/linux/semaphore.h:34: note: macro "DEFINE_SEMAPHORE" defined here
34 | #define DEFINE_SEMAPHORE(_name, _n) \
|
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c:100:16: error: type defaults to 'int' in declaration of 'DEFINE_SEMAPHORE' [-Werror=implicit-int]
100 | static DEFINE_SEMAPHORE(disconnect_sem);
| ^~~~~~~~~~~~~~~~
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c: In function 'dmx_usb_open':
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c:277:16: error: 'disconnect_sem' undeclared (first use in this function)
277 | down (&disconnect_sem);
| ^~~~~~~~~~~~~~
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c:277:16: note: each undeclared identifier is reported only once for each function it appears in
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c: In function 'dmx_usb_disconnect':
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c:677:16: error: 'disconnect_sem' undeclared (first use in this function)
677 | down (&disconnect_sem);
| ^~~~~~~~~~~~~~
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c: At top level:
/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.c:100:16: error: 'DEFINE_SEMAPHORE' defined but not used [-Werror=unused-variable]
100 | static DEFINE_SEMAPHORE(disconnect_sem);
| ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[7]: *** [scripts/Makefile.build:243: /home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/dmx_usb.o] Error 1
make[6]: *** [/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/linux-6.6.18/Makefile:1913: /home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1] Error 2
make[5]: *** [Makefile:234: __sub-make] Error 2
make[5]: Leaving directory '/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/linux-6.6.18'
make[4]: *** [Makefile:15: default] Error 2
make[4]: Leaving directory '/home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1'
make[3]: *** [Makefile:58: /home/cm/openwrt/build_dir/target-aarch64_cortex-a53_musl/linux-mediatek_filogic/dmx_usb_module-19.12.1/.built] Error 2
make[3]: Leaving directory '/home/cm/openwrt/feeds/packages/libs/dmx_usb_module'
time: package/feeds/packages/dmx_usb_module/compile#0.74#0.14#0.86
ERROR: package/feeds/packages/dmx_usb_module failed to build.
No /dev/dmx0 after installing the module
Hi,
I have this system installed on my RPi4B:
Linux rpi 6.1.0-rpi4-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.54-1+rpt2 (2023-10-05) aarch64 GNU/Linux
I need to control LED light connected with Enttec's Open DMX USB device.
I'm able to compile the module after installing kernel headers:
sudo apt install raspberrypi-kernel-headers
But when I install the compiled module using:
sudo insmod dmx_usb.ko
I don't have /dev/dmx0 as is expected in the dmx_usb_test.
This is what I see, when I connect the device to my RPi:
oldes@rpi:~/git/dmx_usb_module $ ls -la /dev/serial/by-id
total 0
drwxr-xr-x 2 root root 60 Nov 10 07:17 .
drwxr-xr-x 4 root root 80 Nov 10 07:17 ..
lrwxrwxrwx 1 root root 13 Nov 10 07:17 usb-FTDI_FT232R_USB_UART_A10NH808-if00-port0 -> ../../ttyUSB0
Any idea, how to make the module working on my setup?
Newer kernel
Newer kernels need the following patch:
index 1e4071e..e79db0c 100644
--- a/dmx_usb.c
+++ b/dmx_usb.c
@@ -23,6 +23,7 @@
#include <asm/uaccess.h>
#include <linux/usb.h>
#include <linux/version.h>
+#include <linux/uaccess.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
#include <linux/semaphore.h>Error Compiling source
error on rpi 4, Debian 11.6 when compiling api-source:
`File "usr/bin/rpi-source", line 111
except urllib2.HTTPError, e:
SyntaxError: invalid syntax`
I tried changing 'urllib2' to 'url lib', same error
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