From: Scott Wood [EMAIL PROTECTED]
To: roger blofeld [EMAIL PROTECTED]
Cc: Wolfram Sang [EMAIL PROTECTED]; Arnd Bergmann [EMAIL PROTECTED];
linuxppc-embedded@ozlabs.org
Sent: Monday, August 25, 2008 10:36:48 AM
Subject: Re: [PATCH V2] MPC52XX: Don't touch pipelining for MPC5200B
roger
- Original Message
From: Wolfram Sang [EMAIL PROTECTED]
To: Arnd Bergmann [EMAIL PROTECTED]
Cc: linuxppc-embedded@ozlabs.org
Sent: Monday, August 18, 2008 9:18:31 AM
Subject: [PATCH V2] MPC52XX: Don't touch pipelining for MPC5200B
MPC5200 needs to have pipelining disabled for
Original Message
From: [EMAIL PROTECTED] [EMAIL PROTECTED]
To: linuxppc-embedded@ozlabs.org
Sent: Friday, December 7, 2007 4:58:56 AM
Subject: Help with MPC5200 + Bestcomm + Local Plus Bus same problem [ifm
ScanMail: oK]
Hello Roger,
i have read your message. I have
Daniel,
Maybe using Sylvain's patches from 2007-05-13
http://ozlabs.org/pipermail/linuxppc-dev/2007-May/035953.html will help?
Does anyone know if those patches are ready for Paul Mackerras' for-2.6.23
branch? http://ozlabs.org/pipermail/linuxppc-dev/2007-June/037903.html
-roger
Matthias,
I would suggest http://git.secretlab.ca/cgi-bin/gitweb.cgi or
http://gitbits.246tnt.com/gitweb/gitweb.cgi?p=linux-2.6-mpc52xx.git;a=summary
or www.denx.de as starting points.
Does anyone know if patches from these repositories are destined to be in the
mainline kernel any time
Hi
I have a custom board which is essentially an icecube with an FPGA on
the local bus. I have a driver which pulls data from the FPGA in
response to interrupts using memcpy_fromio(). I would like to reduce
the CPU usage.
Has anyone used bestcomm to move data from LPB to memory? Is there an
/built-in.o(.init.text+0x302):include/asm/io.h:309: undefined
reference to `isa_io_base'
make: *** [.tmp_vmlinux1] Error 1
This patch fixes it for me, but I don't know if this is the correct
solution.
Signed Off By: Roger Blofeld blofeldus at yahoo.com
-roger
diff --git a/arch/ppc/platforms
' follows non-static declaration
drivers/serial/mpc52xx_uart.c:675: error: previous declaration of
'mpc52xx_uart_driver' was here
Signed off by Roger Blofeld blofeldus at yahoo.com
diff --git a/drivers/net/fec_mpc52xx/fec.c
b/drivers/net/fec_mpc52xx/fec.c
--- a/drivers/net/fec_mpc52xx/fec.c
+++ b
Hi,
A few weeks ago a simple I2S driver was discussed on this list. Is
that driver available for download anywhere? I'd like to try it out
with a simple DAC I have connected to an IceCube board.
Thanks
-roger
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Hi Roger
By experimenting I have found that the BestComm and FEC work without
the cache flush provided CPU_FTR_MAYBE_CAN_NAP is removed from the
cputable (nap disables snooping) and that CPU_FTR_NEED_COHERENT is
added to the cputable (turns on M bit in BAT/PTE so that the XLB
has
a chance of
Sylvain,
By experimenting I have found that the BestComm and FEC work without
the cache flush provided CPU_FTR_MAYBE_CAN_NAP is removed from the
cputable (nap disables snooping) and that CPU_FTR_NEED_COHERENT is
added to the cputable (turns on M bit in BAT/PTE so that the XLB has
a chance of
Sylvain,
Using your latest tree still shows the packet checksum errors, despite
XLB snooping being enabled. I think that the cache flush is required or
that the skb pages must be marked coherent somehow. I note that the 8xx
fec.c file also has a cache flush, so it isn't that strange.
-rb
What tree are you exactly using ?
In mainstream XLB snooping is not configured so if you have the
mainstream + added DMA,
the problem may come from this.
Sylvain
I did a bk clone of the linux-2.5 tree (2.6.10-rc2), then a bk pull of
your tree. You're probably right about the snooping.
Adding a call
flush_dcache_range((u32)skb-data, (u32)skb-data + skb-len);
just before spin_lock_irq() in fec_hard_start_xmit() removes the
remaining transmission checksum errors for me.
-rb
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Retransmissions from the lite5200 work OK now, but the occasional ACK
packet is sent from the lite5200 with a bad checksum causing
retransmissions. Perhaps another patch would fix this problem too?
-roger
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Bravo! Retransmissions now have the correct checksums. Thanks
-roger
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