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Subject: Re: [RFC PATCH v2 0/1] FPGA subsystem core
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Fri, 04 Oct 2013 22:34:10 -0700
To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, monstr@monstr.eu,
        Pavel Machek <pavel@denx.de>, Michal Simek <michal.simek@xilinx.com>,
        linux-kernel@vger.kernel.org, Alan Tull <atull@altera.com>,
        Dinh Nguyen <dinguyen@altera.com>,
        Philip Balister <philip@balister.org>,
        Alessandro Rubini <rubini@gnudd.com>,
        Steffen Trumtrar <s.trumtrar@pengutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Yves Vandervennet <rocket.yvanderv@gmail.com>,
        Kyle Teske <kyle.teske@ni.com>, Josh Cartwright <joshc@eso.teric.us>,
        Nicolas Pitre <nico@linaro.org>,
        Mark Langsdorf <mark.langsdorf@calxeda.com>,
        Felipe Balbi <balbi@ti.com>, linux-doc@vger.kernel.org,
        Mauro Carvalho Chehab <m.chehab@samsung.com>,
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        Samuel Ortiz <sameo@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>
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I do it all the time.

JAM/STAPL seems to me to be more used for exotic connections to serial flash for persistent programming.

Jason Gunthorpe <jgunthorpe@obsidianresearch.com> wrote:
>On Fri, Oct 04, 2013 at 09:00:28PM -0700, H. Peter Anvin wrote:
>
>> Every FPGA toolchain I know of has a way to emit JAM/STAPL bytecode
>> files... and a fair number of programming scenarios need them.
>
>Yes, but now you are talking about JTAG.
>
>JTAG is a very different problem than configuring over the
>configuration bus, I don't think it makes much sense to try and
>combine those two things into a single subsystem.
>
>The majority use of JAM/STAPL output is for manufacturing
>automation. In system, In field programming of SRAM FPGAs via JTAG is
>uncommon.
>
>Jason

-- 
Sent from my mobile phone.  Please pardon brevity and lack of formatting.
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