From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Subject: Re: Marvel 88SE6121 driver Date: Mon, 28 Jan 2008 18:09:10 +0300 Message-ID: <479DF016.7070100@ru.mvista.com> References: <7f96c8390801280622w1edf1784p6144651d3233b8ca@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from h155.mvista.com ([63.81.120.155]:63221 "EHLO imap.sh.mvista.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751155AbYA1PIR (ORCPT ); Mon, 28 Jan 2008 10:08:17 -0500 In-Reply-To: <7f96c8390801280622w1edf1784p6144651d3233b8ca@mail.gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Mike Zheng Cc: htejun@gmail.com, mlord@pobox.com, linux-ide@vger.kernel.org Hello. Mike Zheng wrote: > From PCI config space, the VENDOR_ID and DEVICE_ID are correct for my > driver. However the PCI_COMMAND register of 88SE6121 I got is 0x7, > which is the same as default value. Based on the document, it has to > be 0x0207 to enable interrupt. However I always failed to do so, the Bit 10 (mask 0x0200) is fast back-to-back enable, what does it have to do with iterrupts. > value remains 0x7 after it is re-assigned to the new value 0x0207. So This means that fast back-to-back is not supported > that I have no interrupt from PCIe as INTA. Do you have any idea on > this issue? There's also bit 11 (mask 0x0400) meaning INTx emulation *disable*. > Thanks for your help, > Mike Zheng MBR, Sergei