path: root/Documentation
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authorAndreas Gröger <andreas24groeger@gmail.com>2015-05-05 20:08:34 +0200
committerMarc Kleine-Budde <mkl@pengutronix.de>2015-05-06 08:03:20 +0200
commit844e0edf42d1847b974427b5597009f1de45496c (patch)
tree4d82aa63759b889d1dd41ac92eac7beb066aaad3 /Documentation
parent0d1802ef8fea1eee9bec00319db33ab54202bb0a (diff)
can: janz-ican3: add support for CAL/CANopen firmware
In our department we are using some older Janz ICAN3-modules in our dekstop pcs. There we have slightly different carrier boards than the janz-cmodio supported in the kernel sources, called CAN-PCI2 with two submodules. But the pci configuration regions are identical. So extending the supported pci devices to the corresponding device ids is sufficient to get the drivers working. * The old ICAN3-modules with firmware 1.28 need more then 250ms for the restart after reset. I've increased the timeout to 500ms. * The janz_ican3 module uses the raw can services of the Janz-firmware, this means firmware must be ICANOS/2. Our ICAN3-modules are equipped with CAL/CANopen-firmware, so I must use the appropriate commands for the layer management services. Te driver detects the firmware after module reset and selects the commands matching the firmware. This affects the bus on/off-command (ican3_set_bus_state) and the configuration of the bittiming (ican3_set_bittiming). For better diagnostics the detected firmware string is presented as sysfs attribute (fwinfo). Signed-off-by: Andreas Gröger <andreas24groeger@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'Documentation')
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-net-janz-ican3 b/Documentation/ABI/testing/sysfs-class-net-janz-ican3
index af25a580e6d6..fdbc03a2b8f8 100644
--- a/Documentation/ABI/testing/sysfs-class-net-janz-ican3
+++ b/Documentation/ABI/testing/sysfs-class-net-janz-ican3
@@ -8,3 +8,12 @@ Description:
Default: 1 (termination active)
Reading: get actual termination state
Writing: set actual termination state (0=no termination, 1=termination active)
+What: /sys/class/net/<iface>/fwinfo
+Date: May 2015
+KernelVersion: 3.19
+Contact: Andreas Gröger <andreas24groeger@gmail.com>
+ Firmware stamp of ican3 module
+ Read-only: 32 byte string identification of the ICAN3 module
+ (known values: "JANZ-ICAN3 ICANOS 1.xx", "JANZ-ICAN3 CAL/CANopen 1.xx")

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