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PR/46998 CVS commit: src/sys/dev/ic

The following reply was made to PR port-acorn32/46998; it has been noted by 

From: "Nick Hudson" <>
Subject: PR/46998 CVS commit: src/sys/dev/ic
Date: Wed, 10 Oct 2012 22:40:33 +0000

 Module Name:   src
 Committed By:  skrll
 Date:          Wed Oct 10 22:40:33 UTC 2012
 Modified Files:
        src/sys/dev/ic: seeq8005.c
 Log Message:
 Second part of PR/46998. The following is taken from the PR with a slight
 edit from me.
 The TX buffer size is not a function of the SEEQ chip, it is an arbitrary
 driver threshold, so I've renamed the define accordingly and added a new
 one to specify how many buffers are used (in my port I allow multiple
 packets to be in flight at once, so have used #ifndef, such that the
 makefile can override).
 Comment corrected, and make use of the above defines.
 Missing delay(1) added, otherwise the 20,000 timeout loop is dependent
 on the speed of your processor. Matches ea_stoptx logic now.
 The FIFO empty check does nothing if the previous mode was 'read', but is
 required before changing the BUFCODE (per 80C04 datasheet page 19,
 note [2]). Then the mode is set to write, so a second FIFO empty check is
 needed incase the previous mode was read.
 Treat m0 as a pointer not an integer.
 Remove double write of the NULL packet header. Either do
 memset/ea_writebuf or two writes to SEEQ_BUFWIN, but not both.
 The calculation of nextpacket (for hdr[]) assumes bufstart = 0, and puts
 the packet header pointing in the wrong place when it isn't.
 The setting of CFG2_OUTPUT is done in ea_init(), so doing it in ea_rxinit
 is duplicated code.
 To generate a diff of this commit:
 cvs rdiff -u -r1.50 -r1.51 src/sys/dev/ic/seeq8005.c
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

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