From mboxrd@z Thu Jan 1 00:00:00 1970 From: Albert Lee Subject: Re: PDC20269: Limit on number of controllers? Date: Wed, 23 Feb 2005 15:09:17 +0800 Message-ID: <421C2C1D.9010207@tw.ibm.com> References: <66F9227F7417874C8DB3CEB057727417044F99@MILEX0.Miltope.local> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Received: from bluehawaii.tikira.net ([61.62.22.51]:9211 "EHLO bluehawaii.tikira.net") by vger.kernel.org with ESMTP id S261351AbVBWHJg (ORCPT ); Wed, 23 Feb 2005 02:09:36 -0500 In-Reply-To: <66F9227F7417874C8DB3CEB057727417044F99@MILEX0.Miltope.local> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: "Winstel, Drew" Cc: IDE Linux Winstel, Drew wrote: > I am not sure whether you are > correct about the PLL being initialized (I don't know > enough about the internals to say for certain), but I > have attached the dmesg output from 2.6.10 compiled > with your patch Thanks for the testing and dmesg. From the dmesg, we can see 1st adapter: pll_ctl[57][D] => PLL initialized by the firmware 2nd adapter: pll_ctl[57][D] => PLL initialized by the firmware 3rd adapter: pll_ctl[58][4D] => PLL uninitialized 4th adapter: pll_ctl[58][4D] => PLL uninitialized So, the firmware on the pdc20269 only initialize the 1st and 2nd adapters. PLL of adapter 3/4 are left uninitialized by the firmware. The pdc202xx_new driver relies on the firmware to initialize the PLL. That's why adapter 3/4 won't work. > I have yet to test ATAPI devices on it. With 2.6.10 + pdc20269, there is a known problem on ATAPI DMA. Please use 2.6.11 to test ATAPI. Albert