From: Wolfgang Grandegger <wg-5Yr1BZd7O62+XT7JhA+gdA@public•gmane.org>
To: "Ira W. Snyder" <iws-lulEs6mt1IksTUYHLfqkUA@public•gmane.org>
Cc: socketcan-core-0fE9KPoRgkgATYTw5x5z8w@public•gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public•gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public•gmane.org,
sameo-VuQAYsv1563Yd54FQh9/CA@public•gmane.org
Subject: Re: [PATCH 2/3] can: add support for Janz VMOD-ICAN3 Intelligent CAN module
Date: Mon, 22 Mar 2010 20:23:42 +0100 [thread overview]
Message-ID: <4BA7C3BE.8040306@grandegger.com> (raw)
In-Reply-To: <4BA7C236.9060609-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
Wolfgang Grandegger wrote:
> Ira W. Snyder wrote:
>> On Sat, Mar 20, 2010 at 08:55:16AM +0100, Wolfgang Grandegger wrote:
>>> Ira W. Snyder wrote:
> [snip]
>>>> Does this seem right? It seems pretty good to me.
>>> Yes, I'm just missing an error-passive message. What state does "ip -d
>>> link show can0" report.
>>>
>> Ok, here is what I did:
>>
>> $ ip link set can0 up type can bitrate 1000000
>> $ ip link set can1 up type can bitrate 1000000 berr-reporting on
>> $ ip -d -s link
>> 5: can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10
>> link/can
>> can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 0
>> bitrate 1000000 sample-point 0.750
>> tq 125 prop-seg 2 phase-seg1 3 phase-seg2 2 sjw 1
>> janz-ican3: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1
>> clock 8000000
>> re-started bus-errors arbit-lost error-warn error-pass bus-off
>> 0 0 0 0 0 0
>> RX: bytes packets errors dropped overrun mcast
>> 0 0 0 0 0 0
>> TX: bytes packets errors dropped carrier collsns
>> 0 0 0 0 0 0
>> 6: can1: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UNKNOWN qlen 10
>> link/can
>> can <BERR-REPORTING> state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 0
>> bitrate 1000000 sample-point 0.750
>> tq 125 prop-seg 2 phase-seg1 3 phase-seg2 2 sjw 1
>> janz-ican3: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp-inc 1
>> clock 8000000
>> re-started bus-errors arbit-lost error-warn error-pass bus-off
>> 0 0 0 0 0 0
>> RX: bytes packets errors dropped overrun mcast
>> 0 0 0 0 0 0
>> TX: bytes packets errors dropped carrier collsns
>> 0 0 0 0 0 0
>>
>> Now, in seperate windows, I ran cansequence and candump. I stopped
>> cansequence when it could not send any more packets (due to the cable
>> being unplugged).
>>
>> $ cansequence -v -e -p can0
>> $ cansequence -v -e -p can1
>> $ candump any,0~0,#FFFFFFFF
>> can0 20000004 [8] 00 08 00 00 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000004 [8] 00 08 00 00 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>> can1 20000088 [8] 00 00 80 19 00 00 00 00 ERRORFRAME
>>
>> This last message is repeated lots more times. That's the flooding we're
>> avoiding with berr-reporting off.
>>
>> I see two types of messages here:
>> 1) bus error (only on can1)
>> 2) controller problems -- tx warning limit reached (both)
>>
>> Am I missing some message? My error frame generation was mostly copied
>> from the sja1000 driver.
>
> It seem that you are not getting the error passive interrupt even...
Because you do not enable/handle it. CEVTIND_EPI seems to be missing:
http://lxr.linux.no/#linux+v2.6.33/drivers/net/can/sja1000/sja1000.c#L403
Wolfgang.
next prev parent reply other threads:[~2010-03-22 19:23 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-18 16:38 [PATCH 2/3] can: add support for Janz VMOD-ICAN3 Intelligent CAN module Ira W. Snyder
[not found] ` <1268930324-29841-3-git-send-email-iws-lulEs6mt1IksTUYHLfqkUA@public.gmane.org>
2010-03-19 9:01 ` Wolfgang Grandegger
[not found] ` <4BA33D5A.8070000-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
2010-03-19 15:19 ` Ira W. Snyder
2010-03-19 15:45 ` Wolfgang Grandegger
2010-03-19 20:03 ` Ira W. Snyder
[not found] ` <20100319200325.GE13672-lulEs6mt1IksTUYHLfqkUA@public.gmane.org>
2010-03-19 20:13 ` Wolfgang Grandegger
2010-03-19 21:52 ` Ira W. Snyder
[not found] ` <20100319215227.GF13672-lulEs6mt1IksTUYHLfqkUA@public.gmane.org>
2010-03-20 7:55 ` Wolfgang Grandegger
[not found] ` <4BA47F64.8030108-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
2010-03-22 15:53 ` Ira W. Snyder
[not found] ` <20100322155318.GA19251-lulEs6mt1IksTUYHLfqkUA@public.gmane.org>
2010-03-22 19:17 ` Wolfgang Grandegger
[not found] ` <4BA7C236.9060609-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
2010-03-22 19:23 ` Wolfgang Grandegger [this message]
[not found] ` <4BA7C3BE.8040306-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
2010-03-22 20:12 ` Ira W. Snyder
2010-03-22 20:10 ` Ira W. Snyder
[not found] ` <20100322201039.GA19327-lulEs6mt1IksTUYHLfqkUA@public.gmane.org>
2010-03-22 20:28 ` Wolfgang Grandegger
[not found] ` <4BA7D2E9.6010007-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
2010-03-22 20:51 ` Ira W. Snyder
[not found] ` <20100322205101.GC19327-lulEs6mt1IksTUYHLfqkUA@public.gmane.org>
2010-03-22 21:24 ` Wolfgang Grandegger
-- strict thread matches above, loose matches on Subject: below --
2010-03-29 16:58 Ira W. Snyder
[not found] ` <1269881932-3803-3-git-send-email-iws-lulEs6mt1IksTUYHLfqkUA@public.gmane.org>
2010-03-30 8:14 ` Wolfgang Grandegger
2010-03-31 6:46 ` David Miller
2010-04-01 20:03 ` Andrew Morton
[not found] ` <20100401130359.9a9b5c7b.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2010-04-02 0:43 ` Ira W. Snyder
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