Message-ID: <43F63FD0.3060300@microgate.com>
Date: Fri, 17 Feb 2006 15:27:44 -0600
From: Paul Fulghum <paulkf@microgate.com>
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To: Russell King <rmk+lkml@arm.linux.org.uk>
CC: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] SIIG 8-port serial boards support
References: <20060124082538.GB4855@pazke> <20060124210140.GB23513@flint.arm.linux.org.uk> <20060202102644.GC5034@flint.arm.linux.org.uk> <20060202132726.GD24903@pazke> <20060202201734.GA17329@flint.arm.linux.org.uk> <20060203091308.GA19805@pazke> <20060203092435.GA30738@flint.arm.linux.org.uk> <20060217113942.GA30787@pazke> <20060217200213.GA13502@flint.arm.linux.org.uk>
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Russell King wrote:
> So, there are three distinct flow control scenarios:

So I'm clear on how you interpret these,
am I correct with the following?

> - conventional RTS/CTS
RTS active = ready to receive
CTS active = allowed to send

> - alternative RTS/CTS
RTS active = on before send, off after send
CTS active = allowed to send

> - RS485
RTS active = on before send, off after send (RTS enables driver)
CTS ignored (2 wire mode, no CTS)

So maybe the extra control fields would be:
CRTSONTX - RTS on before send, off after send
CTXONCTS - wait for CTS before sending

-- 
Paul Fulghum
Microgate Systems, Ltd.
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