From owner-freebsd-arm@FreeBSD.ORG Mon Mar 5 14:49:37 2007 Return-Path: X-Original-To: freebsd-arm@freebsd.org Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3624716A403 for ; Mon, 5 Mar 2007 14:49:37 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from harmony.bsdimp.com (vc4-2-0-87.dsl.netrack.net [199.45.160.85]) by mx1.freebsd.org (Postfix) with ESMTP id E117113C48E for ; Mon, 5 Mar 2007 14:49:36 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from localhost (localhost [127.0.0.1]) by harmony.bsdimp.com (8.13.4/8.13.4) with ESMTP id l25En9uJ076737; Mon, 5 Mar 2007 07:49:09 -0700 (MST) (envelope-from imp@bsdimp.com) Date: Mon, 05 Mar 2007 07:49:20 -0700 (MST) Message-Id: <20070305.074920.-1090027333.imp@bsdimp.com> To: krassi@bulinfo.net From: "M. Warner Losh" In-Reply-To: <45EC2BF9.2000804@bulinfo.net> References: <45EC2667.9040004@bulinfo.net> <20070305.072919.2010473806.imp@bsdimp.com> <45EC2BF9.2000804@bulinfo.net> X-Mailer: Mew version 4.2 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0 (harmony.bsdimp.com [127.0.0.1]); Mon, 05 Mar 2007 07:49:10 -0700 (MST) Cc: freebsd-arm@freebsd.org Subject: Re: IIC support? X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Mar 2007 14:49:37 -0000 In message: <45EC2BF9.2000804@bulinfo.net> Krassimir Slavchev writes: : M. Warner Losh wrote: : > In message: <45EC2667.9040004@bulinfo.net> : > Krassimir Slavchev writes: : > : Warner Losh wrote: : > : >> I have problems to access the iic eeprom from userland. Even after set : > : >> SCAN_IICBUS in iicbus.c nothing has been detected. I have made some : > : >> tests from the bootloader to read/write from/to the eeprom and they work. : > : >> Is there any known problems with TWI or any differences between board : > : >> settings? : > : >> : > : > : > : > The IIC bus is not a self enumerating bus. Bad things happen when you : > : > go out and try to 'probe' it, although often you can get away with : > : > that. FreeBSD takes a conservative approach. You need hints for each : > : > iic device on bus that you have on your board. : > : > : > : > : > : Ok, that was just for testing. : > : : > : I am trying to write a driver for pcf8563 (RTC similar to ds1672) but : > : when I call the iicbus_transfer() function the iicbus_transfer_gen() is : > : called instead of at91_twi_transfer(). : > : In the kernel config file I have: : > : ... : > : device at91_twi : > : device iicbus : > : ... : > : : > : Is this correct or I miss something else? : > : > Should be correct. What version of FreeBSD are you using? : > : 7.0-CURRENT, 2 days old OK. I'll take a look to see if there are unmerged patches from p4. I'm nearly positive that I fixed this... Warner