From: Pavel Pisa <p...@cmp.felk.cvut.cz> Hello Stefan and others,
I have found some time over holidays. I have rebased patches and checked that the CAN bus emulation works with QEMU-2.8 release. The work has been started by Jin Yang in the frame of GSoC 2013 slot contributed by RTEMS project which has been looking for environment to allow develope and test CAN drivers for multiple CPU rachitectures. I have menthored the project and then done substantial code cleanup and update to QOM. Deniz Eren then used emulation for SJA1000 base card driver development for other operating system and contributed PCM-3680I support. Some page about the project https://rtime.felk.cvut.cz/can/can-qemu/ RTLWS 2015 article http://rtime.felk.cvut.cz/publications/public/rtlws2015-qemu-can.pdf and slides http://rtime.felk.cvut.cz/publications/public/rtlws2015-qemu-can-slides.pdf GitHub repository with can-pci branch for 2.3, 2.4, 2.7 and 2.8 version if QEMU is available there https://github.com/CTU-IIG/qemu There are more unsolved things in the code still (for example freeze and migration would not work. CAN controllers use proper QOM model but bus/interconnection emulation uses simple broadcast connection which is required for CAN, but it is not based on QEMU bus model). CAN-FD support would be interesting but it is missing and there is almost zero chance that I find spare time to start such work without more people contribute and or funded project at university which would allow to seek between my colleagues for cooperation. But I believe that (even in its actual state) provided solution is great help for embedded systems developers when they can connect SocketCAN from one or more embedded systems running in virtual environment together or with Linux host SocketCAN virtual or real bus interfaces. We have even tested our generic CANopen device configured for CANopen 401 profile for generic I/O running in the virtual system which can control GPIO inputs/outputs through virtual industrial I/O card. This industrial I/O card support would worth to be included in QEMU mainline as well but it would require even more effort to get it into mainline acceptable state then this CAN support even that we have mainlined UIO and Comedi drivers for that this card hardware to Linux mainline long time ago. Generally QEMU can be interesting setup which allows to test complete industrial applications in virtual environment even before real hardware is availabe. Best wishes and sucesfull year 2017, Pavel Deniz Eren (4): CAN bus PCM-3680I PCI (dual SJA1000 channel) emulation added. Fixed IRQ problem for CAN device can_pcm3680_pci. Minor clean-up of can_pcm3680_pci. CAN bus MIOe-3680 PCI (dual SJA1000 channel) emulation added. Pavel Pisa (2): CAN bus simple SJA1000 PCI card emulation for QEMU CAN bus Kvaser PCI CAN-S (single SJA1000 channel) emulation added. default-configs/pci.mak | 2 + hw/Makefile.objs | 1 + hw/can/Makefile.objs | 8 + hw/can/can_core.c | 349 +++++++++++++++++ hw/can/can_kvaser_pci.c | 364 ++++++++++++++++++ hw/can/can_mioe3680_pci.c | 325 ++++++++++++++++ hw/can/can_pci.c | 239 ++++++++++++ hw/can/can_pcm3680_pci.c | 325 ++++++++++++++++ hw/can/can_sja1000.c | 943 ++++++++++++++++++++++++++++++++++++++++++++++ hw/can/can_sja1000.h | 163 ++++++++ include/can/can_emu.h | 123 ++++++ 11 files changed, 2842 insertions(+) create mode 100644 hw/can/Makefile.objs create mode 100644 hw/can/can_core.c create mode 100644 hw/can/can_kvaser_pci.c create mode 100644 hw/can/can_mioe3680_pci.c create mode 100644 hw/can/can_pci.c create mode 100644 hw/can/can_pcm3680_pci.c create mode 100644 hw/can/can_sja1000.c create mode 100644 hw/can/can_sja1000.h create mode 100644 include/can/can_emu.h -- 1.9.1
