From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Cc: linux-can@vger.kernel.org,
Matej Vasilevski <matej.vasilevski@seznam.cz>,
Oliver Hartkopp <socketcan@hartkopp.net>,
David Miller <davem@davemloft.net>,
Carsten Emde <c.emde@osadl.org>,
Marin Jerabek <martin.jerabek01@gmail.com>,
Ondrej Ille <ondrej.ille@gmail.com>,
Jiri Novak <jnovak@fel.cvut.cz>
Subject: Re: [PATCH v1 1/1] can: ctucanfd: Update CTU CAN FD IP core registers to match version 3.x.
Date: Mon, 18 Jul 2022 12:02:12 +0200 [thread overview]
Message-ID: <20220718100212.albs3uormsppr3wz@pengutronix.de> (raw)
In-Reply-To: <b426389bd3c6c4032b4bb6c234ccfe981e6d3860.1658136506.git.pisa@cmp.felk.cvut.cz>
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On 18.07.2022 11:55:18, Pavel Pisa wrote:
> The update is compatible/pure extension of 2.x IP core version
>
> - new option for 2, 4, or 8 Tx buffers option during synthesis.
> The 2.x version has fixed 4 Tx buffers. 3.x version default
> is 4 as well
> - new REG_TX_COMMAND_TXT_BUFFER_COUNT provides synthesis
> choice. When read as 0 assume 2.x core with fixed 4 Tx buffers.
> - new REG_ERR_CAPT_TS_BITS field to provide most significant
> active/implemented timestamp bit. For 2.x read as zero,
> assume value 63 is such case for 64 bit counter.
> - new REG_MODE_RXBAM bit which controls automatic advance
> to next word after Rx FIFO register read. Bit is set
> to 1 by default after the core reset (REG_MODE_RST)
> and value 1 has to be preserver for the normal ctucanfd
preserved?
> Linux driver operation. Even preceding driver version
> resets core and then modifies only known/required MODE
> register bits so backward and forward compatibility is
> ensured.
>
> See complete datasheet for time-triggered and other
> updated capabilities
>
> http://canbus.pages.fel.cvut.cz/ctucanfd_ip_core/doc/Datasheet.pdf
>
> The fields related to ongoing Ondrej Ille's work
> on fault tolerant version with parity protected buffers
> and FIFOs are not included for now. Their inclusion will
> be considered when design is settled and tested.
>
> Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
regards,
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
Vertretung West/Dortmund | Phone: +49-231-2826-924 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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next prev parent reply other threads:[~2022-07-18 10:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-18 9:55 [PATCH v1 0/1] can: ctucanfd: Update CTU CAN FD IP core registers to match version 3.x Pavel Pisa
2022-07-18 9:55 ` [PATCH v1 1/1] " Pavel Pisa
2022-07-18 10:02 ` Marc Kleine-Budde [this message]
2022-07-18 10:00 ` [PATCH v1 0/1] " Marc Kleine-Budde
2022-07-18 10:26 ` [PATCH v2 1/1] " Pavel Pisa
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