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path: root/drivers/net/can/janz-ican3.c
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2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner1-5/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-27can: janz-ican3: fix ican3_xmit()'s return typeLuc Van Oostenryck1-1/+1
The method ndo_start_xmit() is defined as returning an 'netdev_tx_t', which is a typedef for an enum type, but the implementation in this driver returns an 'int'. Fix this by returning 'netdev_tx_t' in this driver too. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2018-03-26drivers/net: Use octal not symbolic permissionsJoe Perches1-3/+3
Prefer the direct use of octal for permissions. Done with checkpatch -f --types=SYMBOLIC_PERMS --fix-inplace and some typing. Miscellanea: o Whitespace neatening around these conversions. Signed-off-by: Joe Perches <joe@perches.com> Reviewed-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-18net: can: janz-ican3: constify attribute_group structures.Arvind Yadav1-1/+1
attribute_group are not supposed to change at runtime. All functions working with attribute_group provided by <linux/netdevice.h> work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 11800 368 0 12168 2f88 drivers/net/can/janz-ican3.o File size After adding 'const': text data bss dec hex filename 11864 304 0 12168 2f88 drivers/net/can/janz-ican3.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-30drivers: net: generalize napi_complete_done()Eric Dumazet1-1/+1
napi_complete_done() allows to opt-in for gro_flush_timeout, added back in linux-3.19, commit 3b47d30396ba ("net: gro: add a per device gro flush timer") This allows for more efficient GRO aggregation without sacrifying latencies. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-09can: janz-ican3: error handling for CAL/CANopen firmwareAndreas Gröger1-9/+95
My patch of May 2015 was missing the changed handling of error indications. With CAL/CANopen firmware the NMTS-SlaveEventIndication must be used instead of CAN-EventIndication. An appropriate slave node must be configured to report the errors. In our department (about 15 development systems with Janz ICAN3- modules with firmware 1.48, my system also with firmware ICANOS 1.35) we use the driver with this patch for about one year: no known problems. Signed-off-by: Andreas Gröger <andreas24groeger@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2015-11-23can: remove obsolete assignment for CAN protocol error typeOliver Hartkopp1-1/+0
The assignment 'cf->data[2] |= CAN_ERR_PROT_UNSPEC' used at CAN error message creation time is obsolete as CAN_ERR_PROT_UNSPEC is zero and cf->data[2] is initialized with zero in alloc_can_err_skb() anyway. So we could either assign 'cf->data[2] = CAN_ERR_PROT_UNSPEC' correctly or we can remove the obsolete OR operation entirely. Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2015-05-06can: janz-ican3: add support for CAL/CANopen firmwareAndreas Gröger1-37/+88
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>
2015-02-04can: janz-ican3: fix type mismatch in assignmentNicholas Mc Guire1-4/+2
return type of wait_for_completion_timeout is unsigned long not int, this patch removes the type mismatch by moving the call into the condition. Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2015-01-20can: move can_stats.bus_off++ from can_bus_off into can_change_stateAndri Yngvason1-0/+1
In order to be able to move the stats increment from can_bus_off() into can_change_state(), the increment had to be moved back into code that was using can_bus_off() but not can_change_state(). As a side-effect, this patch fixes the following bugs: * Redundant call to can_bus_off() in c_can. * Bus-off counted twice in xilinx_can. Signed-off-by: Andri Yngvason <andri.yngvason@marel.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2014-10-20net: can: drop owner assignment from platform_driversWolfram Sang1-1/+0
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-03-17can: Unify MTU settings for CAN interfacesOliver Hartkopp1-0/+1
CAN interfaces only support MTU values of 16 (CAN 2.0) and 72 (CAN FD). Setting the MTU to other values is pointless but it does not really hurt. With the introduction of the CAN FD support in drivers/net/can a new function to switch the MTU for CAN FD has been introduced. This patch makes use of this can_change_mtu() function to check for correct MTU settings also in legacy CAN (2.0) devices. Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2014-03-07can: janz-ican3: convert dev_<level> printing to netdev_<level>Marc Kleine-Budde1-34/+30
This patch converts the dev_<level> printing to netdev_<level>, this makes it possible to remove the "struct device *dev" pointer from the "struct ican3_dev". Cc: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2014-01-30Merge tag 'linux-can-fixes-for-3.14-20140129' of ↵David S. Miller1-1/+1
git://gitorious.org/linux-can/linux-can linux-can-fixes-for-3.14-20140129 Marc Kleine-Budde says: ==================== Arnd Bergmann provides a fix for the flexcan driver, enabling compilation on all combinations of big and little endian on ARM and PowerPc. A patch by Ira W. Snyder fixes uninitialized variable warnings in the janz-ican3 driver. Rostislav Lisovy contributes a patch to propagate the SO_PRIORITY of raw sockets to skbs. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-30can: add destructor for self generated skbsOliver Hartkopp1-14/+4
Self generated skbuffs in net/can/bcm.c are setting a skb->sk reference but no explicit destructor which is enforced since Linux 3.11 with commit 376c7311bdb6 (net: add a temporary sanity check in skb_orphan()). This patch adds some helper functions to make sure that a destructor is properly defined when a sock reference is assigned to a CAN related skb. To create an unshared skb owned by the original sock a common helper function has been introduced to replace open coded functions to create CAN echo skbs. Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Tested-by: Andre Naujoks <nautsch2@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-29can: janz-ican3: fix uninitialized variable warningsIra W. Snyder1-1/+1
Analysis of the code shows that the struct ican3_msg variable cannot be used uninitialized. Error conditions are checked and the loop terminates before calling the ican3_handle_message() function with an uninitialized value. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Acked-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2014-01-16drivers/net: delete non-required instances of include <linux/init.h>Paul Gortmaker1-1/+0
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. This covers everything under drivers/net except for wireless, which has been submitted separately. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-21can: janz-ican3: use dev_get_platdata()Jingoo Han1-1/+1
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2013-06-03net: can: replace strict_strtoul() with kstrtoul()Jingoo Han1-1/+1
The usage of strict_strtoul() is not preferred, because strict_strtoul() is obsolete. Thus, kstrtoul() should be used. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-12-03can: remove __dev* attributesBill Pemberton1-12/+12
CONFIG_HOTPLUG is going away as an option. As result the __dev* markings will be going away. Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: Marc Kleine-Budde <mkl@pengutronix.de> Cc: linux-can@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-15can: janz-ican3: Fix the usage of wait_for_completion_timeoutChuansheng Liu1-2/+2
The return value of wait_for_completion_timeout() is always >= 0 with unsigned int type. So the condition "ret < 0" or "ret >= 0" is pointless. Signed-off-by: liu chuansheng <chuansheng.liu@intel.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-09-21can: janz-ican3: fix support for older hardware revisionsIra W. Snyder1-3/+1
The Revision 1.0 Janz CMOD-IO Carrier Board does not have support for the reset registers. To support older hardware, the code is changed to use the hardware reset register on the Janz VMOD-ICAN3 hardware itself. Cc: stable <stable@vger.kernel.org> Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-07-20can: janz-ican3: add support for one shot modeIra W. Snyder1-1/+7
The Janz VMOD-ICAN3 hardware has support for one shot packet transmission. This means that a packet will be attempted to be sent once, with no automatic retries. The SocketCAN core has a controller-wide setting for this mode: CAN_CTRLMODE_ONE_SHOT. The Janz VMOD-ICAN3 hardware supports this flag on a per-packet level, but the SocketCAN core does not. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-07-20can: janz-ican3: avoid firmware lockup caused by infinite bus error quotaIra W. Snyder1-1/+11
If the bus error quota is set to infinite and the host CPU cannot keep up, the Janz VMOD-ICAN3 firmware will stop responding to control messages until the controller is reset. The firmware will automatically stop sending bus error messages when the quota is reached, and will only resume sending bus error messages when the quota is re-set to a positive value. This limitation is worked around by setting the bus error quota to one message, and then re-setting the quota to one message every time a bus error message is received. By doing this, the firmware never stops responding to control messages. The CAN bus can be reset without a hard-reset of the controller card. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-07-20can: janz-ican3: fix support for CAN_RAW_RECV_OWN_MSGSIra W. Snyder1-46/+157
The Janz VMOD-ICAN3 firmware does not support any sort of TX-done notification or interrupt. The driver previously used the hardware loopback to attempt to work around this deficiency, but this caused all sockets to receive all messages, even if CAN_RAW_RECV_OWN_MSGS is off. Using the new function ican3_cmp_echo_skb(), we can drop the loopback messages and return the original skbs. This fixes the issues with CAN_RAW_RECV_OWN_MSGS. A private skb queue is used to store the echo skbs. This avoids the need for any index management. Due to a lack of TX-error interrupts, bus errors are permanently enabled, and are used as a TX-error notification. This is used to drop an echo skb when transmission fails. Bus error packets are not generated if the user has not enabled bus error reporting. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-07-20can: janz-ican3: fix error and byte countersIra W. Snyder1-5/+6
The error and byte counter statistics were being incremented incorrectly. For example, a TX error would be counted both in tx_errors and rx_errors. This corrects the problem so that tx_errors and rx_errors are only incremented for errors caused by packets sent to the bus. Error packets generated by the driver are not counted. The byte counters are only increased for packets which are actually transmitted or received from the bus. Error packets generated by the driver are not counted. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-07-20can: janz-ican3: cleanup of ican3_to_can_frame and can_frame_to_ican3Marc Kleine-Budde1-5/+5
This patch cleans up the ICAN3 to Linux CAN frame and vice versa conversion functions: - RX: Use get_can_dlc() to limit the dlc value. - RX+TX: Don't copy the whole frame, only copy the amount of bytes specified in cf->can_dlc. Acked-by: Ira W. Snyder <iws@ovro.caltech.edu> Tested-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-07-20can: janz-ican3: drop invalid skbsIra W. Snyder1-0/+3
The commit which added the janz-ican3 driver and commit 3ccd4c61 "can: Unify droping of invalid tx skbs and netdev stats" were committed into mainline Linux during the same merge window. Therefore, the addition of this code to the janz-ican3 driver was forgotten. This patch adds the expected code. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-07-20can: janz-ican3: remove dead codeIra W. Snyder1-2/+0
The code which used this variable was removed during review, before the driver was added to mainline Linux. It is now dead code, and can be removed. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2012-07-20can: mark bittiming_const pointer in struct can_priv as constMarc Kleine-Budde1-1/+1
This patch marks the bittiming_const pointer as in the struct can_pric as "const". This allows us to mark the struct can_bittiming_const in the CAN drivers as "const", too. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2011-11-29net/can: convert drivers/net/can/* to use module_platform_driver()Axel Lin1-12/+1
This patch converts the drivers in drivers/net/can/* to use the module_platform_driver() macro which makes the code smaller and a bit simpler. Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Bhupesh Sharma <bhupesh.sharma@st.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Anatolij Gustschin <agust@denx.de> Cc: Paul Bolle <pebolle@tiscali.nl> Cc: Kurt Van Dijck <kurt.van.dijck@eia.be> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21net: remove mm.h inclusion from netdevice.hAlexey Dobriyan1-0/+1
Remove linux/mm.h inclusion from netdevice.h -- it's unused (I've checked manually). To prevent mm.h inclusion via other channels also extract "enum dma_data_direction" definition into separate header. This tiny piece is what gluing netdevice.h with mm.h via "netdevice.h => dmaengine.h => dma-mapping.h => scatterlist.h => mm.h". Removal of mm.h from scatterlist.h was tried and was found not feasible on most archs, so the link was cutoff earlier. Hope people are OK with tiny include file. Note, that mm_types.h is still dragged in, but it is a separate story. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-26mfd: Use mfd cell platform_data for janz cells platform bitsSamuel Ortiz1-2/+1
With the addition of a platform device mfd_cell pointer, MFD drivers can go back to passing platform data back to their sub drivers. This allows for an mfd_cell->mfd_data removal and thus keep the sub drivers MFD agnostic. This is mostly needed for non MFD aware sub drivers. Cc: Ira W. Snyder <iws@ovro.caltech.edu> Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-31Fix common misspellingsLucas De Marchi1-4/+4
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-23mfd: mfd_cell is now implicitly available to janz driversAndres Salomon1-1/+2
The cell's platform_data is now accessed with a helper function; change clients to use that, and remove the now-unused data_size. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-02-04net: can: janz-ican3: world-writable sysfs termination fileVasiliy Kulikov1-1/+1
Don't allow everybody to set terminator via sysfs. Signed-off-by: Vasiliy Kulikov <segoon@openwall.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-12drivers/net: remove unnecessary flush_scheduled_work() callsTejun Heo1-9/+0
janz-ican3, sh_eth, skge and vxge don't use workqueue at all and there is no reason to flush the system_wq. Drop flush_scheduled_work() calls and references to workqueue. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Wolfgang Grandegger <wg@grandegger.com> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Ramkrishna Vepa <ramkrishna.vepa@exar.com> Cc: Sivakumar Subramani <sivakumar.subramani@exar.com> Cc: Sreenivasa Honnur <sreenivasa.honnur@exar.com> Cc: Jon Mason <jon.mason@exar.com> Cc: netdev@vger.kernel.org
2010-05-28can: Add support for Janz VMOD-ICAN3 Intelligent CAN moduleIra W. Snyder1-0/+1830
The Janz VMOD-ICAN3 is a MODULbus daughterboard which fits onto any MODULbus carrier board. It is an intelligent CAN controller with a microcontroller and associated firmware. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Acked-by: Wolfgang Grandegger <wg@grandegger.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>