From patchwork Tue Dec 13 06:31:33 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eric Benard X-Patchwork-Id: 131002 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id 2AA74100A85 for ; Tue, 13 Dec 2011 17:32:18 +1100 (EST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [IPv6:2a01:e0c:1:1599::12]) by ozlabs.org (Postfix) with ESMTP id AB4441007D4 for ; Tue, 13 Dec 2011 17:32:04 +1100 (EST) Received: from localhost.localdomain (unknown [82.233.81.124]) by smtp3-g21.free.fr (Postfix) with ESMTP id D9130A6511; Tue, 13 Dec 2011 07:31:52 +0100 (CET) From: =?UTF-8?q?Eric=20B=C3=A9nard?= To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 01/19] mxc_udc: add workaround for ENGcm09152 for i.MX25 Date: Tue, 13 Dec 2011 07:31:33 +0100 Message-Id: <1323757911-25217-1-git-send-email-eric@eukrea.com> X-Mailer: git-send-email 1.7.6.4 MIME-Version: 1.0 Cc: Greg Kroah-Hartman , "open list:FREESCALE USB PER..." , open list , Felipe Balbi , Sascha Hauer , "open list:FREESCALE USB PER..." X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org this patch gives the possibility to workaround bug ENGcm09152 on i.MX25 when the hardware workaround is also implemented on the board. It covers the workaround described on page 42 of the following Errata : http://cache.freescale.com/files/dsp/doc/errata/IMX25CE.pdf Signed-off-by: Eric Bénard Cc: Sascha Hauer Cc: Greg Kroah-Hartman Cc: Li Yang --- drivers/usb/gadget/fsl_mxc_udc.c | 22 +++++++++++++--------- 1 files changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/usb/gadget/fsl_mxc_udc.c b/drivers/usb/gadget/fsl_mxc_udc.c index dcbc0a2..4aff05d 100644 --- a/drivers/usb/gadget/fsl_mxc_udc.c +++ b/drivers/usb/gadget/fsl_mxc_udc.c @@ -23,7 +23,7 @@ static struct clk *mxc_ahb_clk; static struct clk *mxc_usb_clk; -/* workaround ENGcm09152 for i.MX35 */ +/* workaround ENGcm09152 for i.MX25/35 */ #define USBPHYCTRL_OTGBASE_OFFSET 0x608 #define USBPHYCTRL_EVDO (1 << 23) @@ -89,16 +89,20 @@ eenahb: void fsl_udc_clk_finalize(struct platform_device *pdev) { struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; - if (cpu_is_mx35()) { + if (cpu_is_mx25() || cpu_is_mx35()) { unsigned int v; - - /* workaround ENGcm09152 for i.MX35 */ + void __iomem *otgbase; + if (cpu_is_mx25()) + otgbase = MX25_IO_ADDRESS(MX25_USB_BASE_ADDR + + USBPHYCTRL_OTGBASE_OFFSET); + else if (cpu_is_mx35()) + otgbase = MX35_IO_ADDRESS(MX35_USB_BASE_ADDR + + USBPHYCTRL_OTGBASE_OFFSET); + + /* workaround ENGcm09152 for i.MX25/35 */ if (pdata->workaround & FLS_USB2_WORKAROUND_ENGCM09152) { - v = readl(MX35_IO_ADDRESS(MX35_USB_BASE_ADDR + - USBPHYCTRL_OTGBASE_OFFSET)); - writel(v | USBPHYCTRL_EVDO, - MX35_IO_ADDRESS(MX35_USB_BASE_ADDR + - USBPHYCTRL_OTGBASE_OFFSET)); + v = readl(otgbase); + writel(v | USBPHYCTRL_EVDO, otgbase); } }