From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 25 Oct 2010 18:44:03 +0200 (CEST) Received: from mail3.caviumnetworks.com ([12.108.191.235]:18709 "EHLO mail3.caviumnetworks.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S1491005Ab0JYQoA (ORCPT ); Mon, 25 Oct 2010 18:44:00 +0200 Received: from caexch01.caveonetworks.com (Not Verified[192.168.16.9]) by mail3.caviumnetworks.com with MailMarshal (v6,7,2,8378) id ; Mon, 25 Oct 2010 09:44:32 -0700 Received: from caexch01.caveonetworks.com ([192.168.16.9]) by caexch01.caveonetworks.com with Microsoft SMTPSVC(6.0.3790.4675); Mon, 25 Oct 2010 09:44:20 -0700 Received: from dd1.caveonetworks.com ([12.108.191.236]) by caexch01.caveonetworks.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.4675); Mon, 25 Oct 2010 09:44:20 -0700 Message-ID: <4CC5B3C9.60000@caviumnetworks.com> Date: Mon, 25 Oct 2010 09:43:53 -0700 From: David Daney User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.12) Gecko/20100907 Fedora/3.0.7-1.fc12 Thunderbird/3.0.7 MIME-Version: 1.0 To: "Ardelean, Andrei" CC: linux-mips@linux-mips.org Subject: Re: Is it any serial8250 platform driver available? References: <4CC1E677.1090404@caviumnetworks.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 25 Oct 2010 16:44:20.0574 (UTC) FILETIME=[DF379FE0:01CB7463] Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 28231 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ddaney@caviumnetworks.com Precedence: bulk X-list: linux-mips On 10/25/2010 08:37 AM, Ardelean, Andrei wrote: > Hi David, > > I studied this driver and few other examples and I have one question > regarding the driver configuration: > Which field must be initialized in the plat_serial8250_port structure: > unsigned long iobase; /* io base address */ > void __iomem *membase; /* ioremap cookie or NULL */ > resource_size_t mapbase; /* resource base */ > Some drivers init only one of them, other two fields. > > My UART is located at 0x1bf01000, can I put this value in all those > fields? > As with many things in life, it depends. In this case it depends on the flags you pass as well as any serial_in() and serial_out() functions you may have. It is fortunate you have the source code available, you can use it to see how the different options affect things. David Daney > Thanks, > Andrei > > > -----Original Message----- > From: David Daney [mailto:ddaney@caviumnetworks.com] > Sent: Friday, October 22, 2010 3:31 PM > To: Ardelean, Andrei > Cc: linux-mips@linux-mips.org > Subject: Re: Is it any serial8250 platform driver available? > > On 10/22/2010 12:23 PM, Ardelean, Andrei wrote: >> Hi, >> >> I am porting MIPS Linux from MALTA to a new board. I ported early >> console code from malta_console.c and I am looking now to use a >> interrupt driven driver for TTY. My UART is compatible with 8250 (1 > UART >> port only) but the UART registers are directly mapped in CPU memory > map. >> There is no PCI bus. My problem is that the driver implemented in > 8250.c >> is very complex and it seems to be hardcode for ISA bus, is it any >> simple platform UART driver available to be directly mapped in the CPU >> space? Can you give me some advice what would be a good approach for > my >> case? >> > > Many chips have 8250 compatible ports and use 8250.c. > > See arch/mips/cavium-octeon/serial.c > > David Daeny >